전이균형(Transitional Equilibrium)을 이용한 인플레이션조세의 후생비용 분석

서종덕 大田大學校 社會科學硏究所 2005 社會科學論文集 Vol.24 No.1

본 연구에서는 신고전파의 성장모형을 이용하여 인플레이션의 진행에 따른 후생효과를 분석하고 있다. 정상상태 간에 존재하는 조정비용을 고려함과 동시에 조세를 모형에 도입하여 후생비용을 정태적인 측면과 동태적인 측면(전이균형)에서 분석하고 있다. 그 결과 조정비용의 존재와 조세의 왜곡효과가 존재하는 경우 후생비용의 크기는 기존의 연구결과 보다 크게 나타나고 있다. This paper uses the neoclassical growth model in which administration of policies is costly to evaluate the size of welfare cost of inflation tax. In addition, we consider the taxes on capital and labor which have effect on the size of welfare cost, so that we can find the equilibriums of both stationary and non -stationary. We find that the presence of adjustment cost increase the welfare cost of inflation. Second, the welfare cost of inflation in the case of higher rate of unemployment is lower. Finally, the interaction between monetary and fiscal polices makes the negative effect on policy maker so that welfare costs is more higher than without fiscal polices

데이터 마이닝 기법을 이용한 환율예측

서종덕(Jong-Duk Suh) 한국산업경제학회 2016 산업경제연구 Vol.29 No.5

실시간으로 발생하는 거대한 양의 빅 데이터를 활용할 수 있는 데이터 마이닝 기법은 기계학습모형들 중 한 가지로 아직 경제학 분야에서는 활발하게 논의되고 있지 않은 분야이다. 특히 자료의 변동성이 큰 금융시장에선 더욱 그러하다. 본 연구는 기계학습모형 가운데 예측성이 우수한 것으로 알려진 데이터 마이닝 기법의 한 종류인 랜덤 포레스트 모형과 금융시장 시계열자료의 변동성을 반영할 수 있는 GARCH 모형을 결합하여 우리나라의 환율에 대한 예측력을 향상시킬 수 있는가를 분석하고 있다. 아울러 어떤 경제변수들이 환율의 변화에 영향을 미치고 있는가를 선별하고 이들 변수들의 중요도에 대해서 분석하고 있다. 분석 결과 기계학습모형과 계량경제모형이 결합된 혼합모형이 기존의 계량경제모형보다 예측력이 향상되었으며, 외환시장에서는 미국달러지수가 시장에 가장 큰 영향을 미치고 있으며 그 다음으로 KRX100 지수와 KOSPI 지수가 영향을 미치는 것으로 나타났다. This paper focused on investigating the predictability of exchange rate returns on daily frequency using the Random Forest model that have been mostly developed in the machine learning field especially data mining. A financial returns data is the presence of volatility clustering but machine learning models assume a constant variance. We therefore extend Random Forest model with the most widely used model for volatility clustering, the GARCH process. This GARCH extended Random Forest model is applied to show whether to improve the predictability of exchange rate return or not. In addition using this model, which variables are important for volatility in exchange market. Our results show that GARCH extended Random Forest model has a great potential for improving the predictive performance of the forecasting of exchange rate returns. In the exchange market US dolla r index is the most important variable and KRX 100 is the second and finally KOSPI index is the third variable.

Survival of Korean Cancer Patients Diagnosed in 1995

Jong-Myon Bae,Young-Joo Won,Kyu-Won Jung,Kyung-Ae Suh,Young-Ho Yun,Myung-Hee Shin,Yoon-Ok Ahn,Duk-Hee Lee,Hai-Rim Shin,Don-Hee Ahn,Dae-Kyu Oh,Jae-Gahb Park 대한암학회 2002 Cancer Research and Treatment Vol.34 No.5

Purpose: To produce the nationwide 5-year survivalrates of Korean cancer patients by primary cancer site.Materials and Methods: The study subjects were cancerpatients diagnosed in 1995, as documented by the KoreaCentral Cancer Registry (KCCR) Program. This data wascollected in 120 (93%) of 129 nationwide intern- andresident-training hospitals and 75 (94%) of the 80 Koreanuniversity hospitals. Follow-up was performed by obtaininginformation upon vital status (i.e., whether living ordead) from the government administered whole populationfiles. Cumulative observed survival rate (OSR) wascalculated by using the life table method and the relativesurvival rate (RSR) was computed using the life-time tablefor the years 1995, 1997, and 1999.Results: Of the 55,042 study subjects, the OSR for allKorean cancer patients was 61.4% at 1 year and 38.1%at 5 years. The RSR for all cancers was 62.5% at 1 yearand 41.4% at 5 years, and the 5-year RSRs for all cancersin men and women were 32.6% and 53.2%, respectively.Conclusion: This is the first nationwide report upon5-year cancer survival by primary site in Korea. Menshowed a lower survival rate than women in most malignancies.Pancreatic and thyroid cancer had the lowestand highest 5-year survival rates, respectively. (Cancer Res Treat. 2002;34:319-325)

A Minimum Energy Tracking Loop with Accurate Energy Sensing and Hierarchical Tracking

Jong-Woo Kim,Bomin Joo,Jung-Duk Suh,Joo-Seong Kim,Bai-Sun Kong 대한전자공학회 2020 Journal of semiconductor technology and science Vol.20 No.4

This paper describes a minimum energy tracking (MET) loop to allow load system to consume the minimum energy with changing workload and temperature. The proposed loop can track the minimum energy point more accurately by adopting an accurate energy sensing and a hierarchical tracking methods, resulting in more energy saving than the conventional approach. The proposed MET hardware has been fabricated in a 130nm CMOS process. The experimental results indicated that the accuracy of the proposed loop was improved up to 95% and 99.4% for light and heavy workload conditions, respectively, resulting in energy saving up to 38.7% as compared to the conventional loop.

간접형 빌리루빈이 더 높았던 Rotor 증후군 1예

서동진,정상용,신동우,구양서,김진휘,정종익,한병철,권덕호 대한내과학회 2000 대한내과학회지 Vol.59 No.1

Rotor syndrome is a rare benign familial disorder characterized by chronic, fluctuating, nonhemolytic and predominantly conjugated hyperbilirubinemia with normal liver tissue. In contrast to Dubin-Johnson syndrome, there is no liver hyperpigmentation in Rotor syndrome, and BSP clearance does not show a secondary retention peak. The serum bilirubin in patients with Gilbert's syndrome is almost all unconjugated in contrast to Rotor syndrome. A 29-year-old male was admitted due to persistent jaundice. Physical examination revealed icteric sclera without hepatosplenomegaly. Laboratory findings showed increased serum bilirubin with indirect bilirubin predominance. Urinary excretion of total coproporphyrin was markedly elevated, and coproporphyrin Ⅰ was 66% of total urinary coproporphyrin. Oral cholecystography showed well visualized the gallbladder, but 99mTc-DISIDA scan showed markedly decreased hepatic uptake and poor visualization of the gallbladder and biliary tract. Histology of the liver showed no abnormalfinding. We report the case with the review of literature.(Korean J Med 59:109-113, 2000)

벼의 蒸發散量 算定에 關한 實驗 分析

徐承德,李鍾國 COLLEGE OF AGRICULTURE KYUNGPOOK NATIONAL UNIVERSI 1985 慶北大農學誌 Vol.3 No.-

This work was carried out to obtain the most suitable crop coefficient for the paddy rice growing in Taegu area. The result was due to the comparative measurement of evapotranspiration formula in terms of Blaney & Criddle and eight other formulas with those produced by experiment particularly in this area. The crop coefficient, evapotranspiration and transpiration ratio produced by this research are hopefully expected to be of service in the future calculation of evapotranspiration without repeating experiment respectively, whenever the water requirement of paddy rice is planned in Taegu and its vicinity. The accomplished results could be summarized as follows : The maximum amount of evapotranspiration was recorded in the early and middle parts of August. The average reading of evapotranspiration was 6.33 ㎜/day throughout the growth. The evapotranspiration had a highly significant correlation with pan evaporation, solar radiation, sunshine hours and relative humidity of meteorological elements. K and Kc by the use of Blaney & Criddle formula calculated at 0.76 to 1.45 and 0.82 to 1.27, respectively. Its peak value appeared commonly in early August. The ratio of transpiration was 269. 03.

두개골 전이로 진단된 원발성 간세포암 1예

서경희,이덕현,이동엽,제석준,우상균,정시욱,백효종,김원호 慶北大學校 醫科大學 1998 慶北醫大雜誌 Vol.39 No.2

경기변동을 고려한 인플레이션의 후생비용 측정

서종덕 大田大學校 社會科學硏究所 2006 社會科學論文集 Vol.25 No.1

본 연구는 실업률을 기준으로 경제상황을 구분한 후 고실업률과 저실업률 상황에서 인플레이션의 후생비용을 측정하고 있다. 경제주체들은 이질적이고 개별적 불확실성에 직면하며, 화폐는 이러한 개별적 불확실성에 대비하기 위해 보유되는 Imrohoroglu(1992)의 유동성제약 모형을 따르고 있다. 연구결과를 요약하면 다음과 같다. 첫째, 초기 실업률 수준에 관계없이 기존 연구결과와 동일하게인플레이션은 화폐보유에 따른 조세로 작용하여 인플레이션율이 높아지면서 후생비용을 증가시키고 있다. 둘째, 인플레이션 후생비용은 실업률이 높아지면서(낮아지면서) 감소(증가)하는 것으로 나타났다. 이러한 결과는 본 연구를 통해 얻어진 주요한 결과로 동일한 인플레이션을 유발하는 통화정책에 대해 고실업률 경제에선 인플레이션 조세부담 효과가 유동성 완화 효과보다 적기 때문인 것으로 보인다. This paper calculate the welfare cost of inflation in various economic environments which are classified by the rate of unemployment. Individual agents in the model who face on idiosyncratic uncertainty are dealt with the heterogeneous. In addition the money which individual agents are holding is treated as assets for the purpose of ‘individual uncertainty. These characteristics are following the Imrohoroglu(l992), which is so called liquidity constraint model. The results are followings. First, accepted as general results in existing research, welfare costs of inflation is increased as the rate of inflation is higher. But the second essay is to show that the results are always sustained in spite of various initial rate of unemployment. Second, the welfare cost in the case of the rate of unemployment is higher is more higher. The result show the possibility that in circumstance with the same rate of inflation the effects of inflation tax are more powerful then that of liquidity effects.

Relationship Between Blood Metabolic Profile and Milking Performance in Holstein Cows

Duk-Yoon Kil(길덕윤),Gi-Hwal Son(손기활),Jong-Suh Shin(신종서),Byung-Ki Park(길박병기) 한국산학기술학회 2023 한국산학기술학회논문지 Vol.24 No.3

본 연구는 홀스타인 착유우에서 혈중 대사물질 농도와 산유 성적의 연관성을 검증하기 위해 수행하였다. 총 885두의 암소는 비유 단계, 산유량 및 산차에 따라 각각 4(비유 초기, 비유 중기, 비유 후기 및 건유기), 4(< 30, 30 – 35, 36 - 40 및 > 40 kg/일) 혹은 5(1, 2, 3, 4 및 5 산차)개의 그룹으로 배치되었다. 산유성적과 혈청 대사물질은 시험조건에 따라 수집 및 분석되었다. glucose 농도는 비유 초기 및 중기 그룹에서 낮았지만(p < 0.05), 혈청 non-esterified fatty acid (NEFA) 농도는 비유 초기 및 건유기 그룹에서 높았다(p < 0.05). 혈청 blood urea nitrogen과 Mg의 농도는 비유 후기 및 건유기 그룹에 비해 비유 초기 및 중기 그룹에서 높았다(p < 0.05). 혈청 NEFA, albumin 및 cholesterol 농도는 다른 그룹에 비해 > 40 kg/일 그룹에서 높았다(p < 0.05). 혈청 glucose, cholesterol 및 Mg 농도는 다른 산차 그룹에 비해 1산차 그룹에서 높았다(p < 0.05). 혈청 total protein 및 globulin 농도는 저산차 그룹(1, 2 및 3 산차)에 비해 고산차 그룹(4 및 5 산차)에서 높았다(p < 0.05). 따라서 본 연구의 결과에서 홀스타인 착유우의 영양 및 건강 상태를 보다 정밀하게 진단하기 위해서는 비유 단계와 산유량 및 산차를 함께 고려할 필요가 있는 것으로 판단된다. This study was conducted to evaluate the relationship between blood metabolic profile and milking performance in Holstein cows. 858 cows were each allocated to four or five groups according to lactation stage, milk yield, and parity. Milk performance and serum metabolites were collected and analyzed with respect to experimental conditions. Mean serum glucose concentration was lower in the early- and mid-lactation groups (p < 0.05), but non-esterified fatty acid (NEFA) concentration was higher in early-lactation and dry-period groups (p < 0.05). Serum blood urea nitrogen and Mg concentrations were higher in the early- and mid-lactation groups than in the late-lactation and dry-period groups. NEFA, albumin, and cholesterol concentrations were highest in the > 40 kg/d group (p < 0.05). Glucose, cholesterol, and Mg concentrations were higher in the parity 1 group than in the other parity groups (p < 0.05), and total protein and globulin concentrations were higher in the parity 4 and 5 groups than in the lower parity groups. Thus, we recommend that blood metabolic profiles be considered with lactation stage, milk yield, and parity to more accurately determine the nutritional and health statuses of Holstein cows.

발작성 고도 방실 차단을 동반하여 영구형 인공심박조율기를 삽입한 Emery-Dreifuss형 근이영양증 1례

홍종서,강지향,이공섭,이창선,최현주,이병두,김준수,서연림,김덕경,지제근,안경주 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.10