http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
성견 치조골 결손부에 자가골이식과 조직유도재생막을 이용한 치주치료시 치유효과에 관한 비교연구
홍기석,김종여,정진형,Hong, Ki-Seok,Kim, Jong-Yeo,Chung, Chin-Hyung 대한치주과학회 1994 Journal of Periodontal & Implant Science Vol.24 No.1
The goal of periodontal therapy is the regeneration of the periodontium lost by periodontal disease. The purpose of this study was to evaluate the regenerative potential of the autogenous bone graft and guided tissue regeneration in the treatment of periodontal bony defect in dogs. Experimental periodontitis were induced in the mandibular left 3rd premolar and right 3rd and 4th premolars of 5 dogs using orthodontic ligature wire. After 6 weeks, the ligature wire removed, surgical procedure were performed as follows. 1) control group : Flap operation(Mn.Lt 3rd premolar) 2) experimental group I : Flap operation + autogenous bone graft (Mn.Rt. 3rd premolar) 3) experimental group II : Flap operation + Gore-Tex membrane (Mn.Rt. 4th premoalr) Thereafter, dogs were sacrificed on the 1,2,4,8,16th week and the specimens were prepared and stained with hematoxyline-eosin stain for the light microscopic examination. The results of this study were as follows. 1. The apical migration of junctional epithelium was most remarkable in the flap operation and the experimental group II was less than the experimental group I. 2. In the formation of new alveolar bone, it was found in experimental group I,II and experimental group I is more than II. In the control group, few bone formation was found. 3. In the formation of new cementum, it was found in experimental group I,II and experimental group II is more than I. So, the periodontal therapy combined with autogenous and guided tissue regeneration will be produce the periodontal regeneration.
홍기석,손은승 한국개발연구원 2005 KDI Journal of Economic Policy (KDI JEP) Vol.27 No.2
Using Korean household data, this paper examines how consumption of durable goods is determined. Previous studies report that the standard Permanent Income Hypothesis (PIH), while being broadly consistent with non-durable goods consumption, provides little explanation for durable goods consumption. In this paper, we consider the (S, s) model as an alternative to the standard PIH. The (S, s) model predicts that, because of fixed adjustment costs, consumers make no adjustment to the durable goods stock until deviation from the optimal level becomes large. When the adjustments are made, the durable goods stock attains the optimal level. In order to test this prediction, we examine the intra-temporal relationship between non-durable goods and durable goods consumption and intertemporal changes in durable goods consumption, using data from the Korean Household Panel Study. The results show that, while the standard PIH is rejected by the data, the (S, s) model is not. 본 논문은 우리나라 가계의 내구재 소비 결정에 관한 실증분석이다. 기존의 연구에 의하면 표준적인 항상소득가설은 비내구재 소비에 대해서는 비교적 높은 설명력을 나타내지만 내구재 소비에 대해서는 설명력이 거의 없는 것으로 나타난다. 본 연구에서는 이러한 항상소득가설의 대안으로서 조정비용의 존재를 허용하는 (S, s)모형을 고려한다. (S, s)모형에 의하면 내구재 소비는 조정비용 때문에 매 순간 최적 수준을 유지하지는 못하지만, 일단 조정이 이루어지는 경우에는 최적 수준을 달성할 것으로 예상된다. 본 논문은 (S, s)모형의 이러한 예측을 검증하기 위하여 한국가구 패널조사자료에 나타난 각 가계의 내구재 소비와 비내구재 소비의 관계 및 내구재 소비의 기간 간 변화를 살펴본다. 분석결과에 의하면 표준적인 항상소득가설은 기각되는 반면 (S, s)모형은 대체로 자료와 일치하는 것으로 나타난다.
주택 소비와 습관형성 : 주관적 만족도 및 주택 소비 자료의 분석
홍기석 한국응용경제학회 2017 응용경제 Vol.19 No.1
본 연구는 비내구재 소비 대신 주택 소비를 대상으로 하여 습관형성(habit formation)의 실증적 증거를 살펴본다. 특히 한국노동패널의 주관적 만족도 자료를 이용하여 주택 소비가 개인의 만족도에 미치는 영향을 추정하고, 습관형성과 예상오류(projection bias)의 가능성을 고려한 이론적 모형에 근거하여 주택 소비와 비내구재 소비 간의 관계도 추정한다. 본 연구의 주요 분석결과는 다음과 같다. 첫째, 주택 소비의 경우 헤도닉적응(hedonic adaptation) 혹은 습관형성의 경향이 유의하게 관찰된다. 반면 비내구재 소비의 경우에는 유사한 결과가 관찰되지 않는다. 둘째, 소비자들이 습관형성의 정도를 과소평가할 경우에 존재할 것으로 예상되는 주택 소비와 비내구재 소비 간의 관계도 실제 자료에서 관찰된다. 셋째, 본 연구의 결과는 주택 소비에 관한 다른 가설 특히 조정비용 모형으로는 잘 설명되지 않는다. This paper reexamines empirical evidence on habit formation focusing on housing consumption. In particular, we use a household database to estimate the effect of housing consumption on subjective well-being and the relationship between housing and nondurables consumption implied by the theory. Main results are as follows. First, we find significant evidence of hedonic adaptation or habit formation for housing consumption, but not for nondurables consumption. Second, we find a relationship between housing and nondurables consumption that is consistent with a model of projection bias. Third, our results are not easily explained by alternative hypotheses including the non-convex adjustment cost model.
정상 한국인 혈청 포도당, Insulin 및 C-Peptide 의 일중 변동에 관한 연구
홍기석,이홍규,고창순,최두혁,정준기 대한핵의학회 1983 핵의학 분자영상 Vol.17 No.1
Sixty-nine patients with diffuse lung uptake of Tc-99m-tin colloid were evaluated to determine the kinds of associated diseases, the incidence of associated liver scan abnormalities, and prognosis. The results were as follows: 1) Diseases (associated with dliffuse lung uptake included malignancies in 3l patients, infectious diseases in 19, chronic liver diseases in 14, and others in 5, It appeared that the marked degree of lung uptake was associated with severe diseases. 2) Thirty-one of the 69 patients(45%) had abnormal liver size, 43(62%) had space occupying lesions or nonhomogeneity in liver image, 37(54%) had splenomegaly and 45(65%) had increased splenic uptake. In creased bone marrow uptake was found in 48(70%) and renal uptake in 15(22%). As the degree of lung uptake increased, there was a statistically significant (p〈0.05) tendency for the incidences of the abnormal liver image and renal uptake to increase. 3) Sixty-two of the 69 patients were followed up for one to 439 days (mean 44 days) after live scanning. Eleven(l8%) were dead, 10(16%) were aggravated, and 13(21%) were improved. Most of improved patients had infectious diseases. It appeared that diffuse lung uptake of Tc-99m-Tn colloid was found in the various diseases including malignancies, infections, and chronic liver diseases, and that it was strongly associated with other liver scan abnormalities, but was not necessarily associated with a poor prognosis, particularly when underlying diseases were infections.