거시경제 변수를 활용한 주택담보대출 연체율에 미치는 결정요인에 관한 연구

이석원(Lee, Seok-Won),황윤구(Hwang, Yun-Goo),윤영의(Yoon, Young-Eui) 한국부동산정책학회 2017 不動産政策硏究 Vol.18 No.3

In the second quarter of 2017, the size of the household debts has been reaching 1,388 trillion won. And, because the size of the housing mortgage loans has been closing in upon 560 trillion won, around 40.3% has been crowded in the housing demand funds. Regarding this, there is no choice but for the influence on the entire economy to be high according to the increase of the delinquency rate in case the economy worsens or the recession continues. This study intends to suggest the implications regarding the housing mortgage loans in the long-term viewpoint through the influence evaluations of the macroeconomic variables related to such housing mortgage loan delinquencies. The macroeconomic variables that were used were the housing mortgage loan delinquency rate (TOD), the price index of the average buying and selling of the real apartment transactions (APT_PRICE), the new housing mortgage loan interest rate (HINTEREST), the index of the industrial products (IIP), the amount of money in circulation (M2), the monetary amount of the housing mortgage loans (HML), the amount of the apartment transactions (TRADE), and these were unfolded in the viewpoint of the relationship with the real estate market and the currency policy. As a result of the unit root test, it appeared that, regarding the amount of the apartment transactions, the time series raw data had been maintaining the stability. And it was able to find out that the data of the remaining variables, including the housing mortgage loan delinquency rate (TOD), had been getting stabilized through the primary difference. Because, as a result of a co-integration test, at least 6 variables possess the linear, the selection of the model used the VEC model, and, regarding the optimal differential, the 1st model was selected based on the SC (Schwarz Criterion) value. As a result of taking a look at the granger causality relationship, it appeared that the variables that had the influences on the housing mortgage loan delinquency rate were the price index of the average buying and selling of the real apartment transactions (APT_PRICE), the new housing mortgage loan interest rate (HINTEREST), the index of the industrial products (IIP), the amount of money in circulation (M2), and the amount of the apartment transactions (TRADE). As a result of analyzing the VECM (Vector error correction Model) short-run equilibrium relationship, it appeared that the housing mortgage loan delinquency rate were influenced by the index of the average price of the buying and selling of the real transactions of the apartments and by the index of industrial products. As a result of a reaction to a shock, the positive (+) correlation appeared between the housing mortgage loan delinquency rate and the amount of the transactions of the apartments (TRADE) and, also, the interest rate of the new housing mortgage loan (HINTEREST). Eventually, regarding the housing mortgage loan delinquency rate, if the interest rate goes up, right away, an increase of the delinquency rate takes place. And, it appeared that, if the monetary amount of the housing mortgage loan becomes big, the delinquency rate decreases. This is because the delinquency rate has the influences on the incomes and others of the like, it can be under the control of the interest rate policies. The meaning of this research is that it investigated about the relationship with the housing mortgage loan delinquency rates by considering the indices in the real estate market and the currency policies at the same time. And, it is that, in the condition in which the scale of the housing mortgage loan having become big at present, raising the interest rate can aggravate the confusion more in the market. As a result, with regard to the proceeding with the real estate policies, the prudent and macroscopic approach is needed. And the researches on the relationships of the indices will be needed more in the macroscopic viewpoint.

공 컨테이너를 고려한 컨테이너 내륙수송에서의 차량배치문제

윤원영,안창근,최용석 한국경영과학회 1999 한국경영과학회지 Vol.24 No.4

In the container transportation of inland depots the empty container is an important issue. The truck dispatching problem in this paper is considered under restriction about empty containers. When a full container arrives in a depot by truck, after unloading operation the full container is changed to an empty container. After loading operation an empty container is changed to a full container. We suggest an integrated approach to the problem of simultaneously managing empty truck and container movements. We would like to find the truck dispatching method minimizing empty truck movements and empty container movements. In this paper, a mixed integer programming model is developed to obtain the optimal truck dispatching in container transportation and heuristic is developed to give a good solution in much shorter time. The numerical examples are studied and the proposed heuristic is also compared with the result of numerical examples.

급성 뇌경색 환자에서 경색 위치가 심근 효소치 상승에 미치는 영향

윤경호,박현영,박성욱,장혁,김요식,조광호,유남진,김남호,오석규,정진원 圓光大學校 醫科學硏究所 2003 圓光醫科學 Vol.18 No.2

레진모형근관에서 엔진구동형 및 수동형 ProTaper 파일로 근관성형 후 근관형태 변화에 대한 비교연구

양인석,강인철,황윤찬,황인남,오원만 大韓齒科保存學會 2005 Restorative Dentistry & Endodontics Vol.30 No.5

본 연구는 형태 및 재질이 동일한 엔진구동형 ProTaper 파일과 수동형 ProTaper 파일을 이용하여 레진모형근관을 성형한 후 근관형태 변화를 비교 분석하고자 시행되었다. 본 연구에서는 레진모형근관으로 총 40개의 J자와 S자의 근관형태가 재현된 ENDO-TRAINING BLOC을 사용하였다. 근관 성형 기구로는 엔진구동형 Ni-Ti 파일로 ProTaper^(TM), 수동형 Ni-Ti 파일로 ProTaper^(®) For Hand Use를 사용하였다. 사용된 레진모형근관과 파일의 종류에 따라 10개씩 4개의 그룹으로 나누어 근관성형을 시행하였다. 근관 성형 전 · 후 이미지를 스캐너 (Color scanner, UMAX Techologies, Inc., USA)를 이용하여 얻은 후, Photoshop 7.0 프로그램 (Adobe System Inc., USA)을 이용하여 이미지를 중첩하였다. 이미지 분석 프로그램 (Image-Pro^(®) Plus, Media Cybernetic, USA)을 이용하여 치근단 쪽에서부터 0, 1, 2, 3, 4, 5, 6 및 7 ㎜ 수준에서 근관 성형에 따른 근관의 내측 및 외측 폭경의 변화량, 근관 총폭경의 변화량, 근관 중심축의 변위량을 측정하였다. 또한 근관 성형 시간을 기록하였다. 두 기구 사이의 유의성 검정을 위해 독립 표본 t-검정을 시행하여, 근관 성형 시 수동형 ProTaper 파일에 엔진구동형 ProTaper 파일에 비해 근관 중심축의 변위가 유의하게 덜 일어나며 근관의 원래 형태를 더욱 잘 유지할 수 있지만, 근관 성형시간은 길어질 수 있다는 결론을 얻었다. The purpose of this study was to compare the canal configuration after shaping by ProTaper rotary files and ProTaper hand files in resin simulated canals. Forty resin simulated canals with a curvature of J-shape and S-shape were divided into four groups by 10 blocks each. Simulated root canals in resin block were prepared by ProTaper rotary files and ProTaper hand files using a crown-down pressureless technique. All simulated canals were prepared up to size #25 file at end-point of preparation. Pre- and post-instrumentation images were recorded with color scanner. Assessment of canal shape was completed with an image analysis program. Measurements were made at 0, 1, 2, 3, 4, 5, 6 and 7 ㎜ from the apex. At each level, outer canal width, inner canal width, total canal width, and amount of transportation from original axis were recorded. Instrumentation time was recorded. The data were analyzed statistically using independent t-test. The result was that ProTaper hand files cause significantly less canal transportation from original axis of canal body and maintain original canal configuration better than ProTaper rotary files, however ProTaper hand files take more shaping time.

Symplastic glomus tumor 1예

이원채,장윤환,김효진,이석종,정상립,이수경,배한익 대한피부과학회 2003 대한피부과학회지 Vol.41 No.8

Glomus tumor is a benign lesion characterized by vessels and glomus cells in the varying proportion and it classically presents as a solitary, painful papule or nodule. Occasionally it displays unusual histopathologic features diagnosed as "atypical" glomus tumor, including malignant glomus tumor, glomus tumor of uncertain malignant potential, glomangiomatosis, and symplastic glomus tumor. Glomangiomatosis and symplastic glomus tumor reveal benign biologic behavior. We report herein a typical case of symplastic glomus tumor showing marked nuclear atypia, its only unusual feature comparing with classical one, in addition to the typical clinical and pathological features. (Korean J Dermatol 2003;41(8) : 1118~1120)

J-R 곡선에 대한 시편크기의 영향에 관한 연구

조연제,석창성,김영진,양원호,최용식 成均館大學校 科學技術硏究所 1995 論文集 Vol.46 No.1

The objective of this paper is to investigate the constraint effect on fracture resistance curves. A series of fracture toughness tests with different specimen sizes taken from nuclear piping materials(SA312 TP347 SA516 Gr. 70) were performed. Test results show that fracture toughness is increased with increase in specimen size, probably due to the relaxation crack tip constraint. Elastic-plastic finite element analyses were also performed to investigate the constraint effect. Numerical results show that the stress triaxiality at the crack tip is the governing factor for fracture toughness.

60세 이상 환자의 척추수술

윤석만,이경석,도재원,배학근,윤일규 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.1

Objective: Advances in surgical technique, anesthesia and perioperative patient management, coupled with the rapid increase in the population of patients reaching their 60s or older, have led to a signiticant rise in spinal precedures. The objective of this study was to evaluate frequency of the disease, surgical results and postoperative complications of the aged patients who underwent spinal surgeries. Methods : We reviewed all spinal procedures for spinal lesions including degenerative diseases, trauma, tumor and others in patients aged 60 years or older between January 1 1994 and October 1 1998(56 men and 26 women), retrospectively. Final outcome was assessed by telephone interview with the patient or the family in 67.1%(55/82). Results : There were 56 male patients and 26 female patients. There were 57 cases of degenerative diseases, 14 cases of trauma, 5 cases of metastaisis, 4 cases of infection and 2 cases of others. According to the level of surgical procedures, there were 20 cases fo cervical spine, 8 cases of thoracic spine, 54 cases of lumbar spine. Postoperaive complications included the following(17/82): 7 dural tears, 2 sepsis, 2 nerve root injury and 6 others. There were no operation-related deaths. During follow up period, ten patients(12.2%) had died, 45 patients(54.9%) were contacted and 27 patients(32.9%) could not be located. Mean follow up period for the 45 patients contacted was 26.1±15.7 months. Of the 45 persons contacted, 34(75.6%) reported improvement, 6(13.3%) no change and 5(11.1%) aggravation of their preoperative symptoms. Conclusion: Spine surgery in patients aged 60 years or older has higher complication rate compare to the younger but it is reasonable to consider the surgical procedures even in the elderly if it is needed. We should give attention not to tear the dura during the surgical procedures, especially in the elderly.

새로운 Quinolone 誘導體의 合成에 關한 硏究(Ⅱ)

함원훈,고윤석,배형준,이기영,정영훈 성균관대학교 약학연구소 1995 成均藥硏論文集 Vol.7 No.1

Abstract - Palladium catalyzed cross-coupling reactions of aryl halides with organo tin reagents and π-sufficient aromatic heterocycles proceeded easily and efficiently during carbon-carbon bond formation. We used this method for the anti bacterial agents, and synthesis of new quinolone derivatives which have C-C bond at C-7 position of general quinolone moieties. Quinolone moieties, and aryl tin or aromatic heterocycles in the presence of palladium catalyst were coupled to afford new quinolone derivatives. The synthesis and structure-activity relationship are presented.

요석 환자에서 대사 이상의 평가

이석영,서정원,윤석중,이상철,김용태,김원재 충북대학교 의학연구소 2001 忠北醫大學術誌 Vol.11 No.2

연구목적: 요석은 대사적 질환의 일종이라 할 수 있으며 이는 소변의 유체 역학의 장애나 혹은 배설되는 대사 산물의 생화학적 불균형으로 초래하게 된다. 따라서 본 연구에서는 24시간 요검사를 통하여 요석 환자들에서 요중 대사적 이상에 대해 알아보고자 하였다. 대상 및 방법: 연속적으로 내원한 재발성 요석 환자 151명(남자 114명, 여자 37명)을 대상으로 하였으며, 요석이 완전 치유된 후 최소 3개월이 지나고 24시간 소변을 채취하여 요량, 나트륨, 인, 요산, 칼슘, 마그네슘, 수산 및 구연산에 대하여 분석하였으며 대사 이상의 종류 및 빈도를 조사하였다. 결과: 요석 환자들에서 가장 호발하는 대사적 이상은 저구연산뇨증(47.1%)이었으며 다음으로 고나트륨뇨증(43.2%), 저소변량(30.5%), 고칼슘뇨증(23.5%), 고요산뇨증(22.1%), 고수산뇨증(10.7%), 그리고 저마그네슘뇨증(9.4%) 순이었다. 151명의 환자 중 적어도 한가지 이상의 대사 이상이 136명에서 관찰되었다. 결론: 요석 환자들에서 요중 대사 이상은 90.1%에서 관찰되었으며 저구연산뇨증과 고나트륨뇨증이 요석의 생성과 재발에 중요한 역할을 하는 것으로 조사되었다. 이러한 요중대사적 평가는 요석 환자의 진단 및 예방에 유용하게 이용될 수 있을 것으로 사료된다. Purpose: Urolithiasis is a metabolic disease which arises from disturbances of the physico-chemical balance or the hydrodynamic system of the urine. This study was to determine the metabolic abnormalities through the 24-hour urine examination in patients with urolithiasis. Materials and Methods: The 24-hour urine specimens of 151 RSF (114 men, 37 women) were analyzed for volume, sodium, phosphorus, uric acid, calcium, magnesium, oxalate, and citrate. The incidence and frequency of metabolic abnomalities in RSF were determined. Results : The most frequent metabolic abnormality in RSF was hypocitraturia (47.1% ), followed by hypernatriuria (43.2%), low urine volume (30.5% ), hypercalciuria (23.5%), hperuricosuria (22.1%), hyperoxaluria (10.7%), and hypomagnesiuria (9.4%). At least one metabolic abnormality was found in 136 out of 151 RSF. Conclusion : Our results showed that RSF had metabolic abnormalities were found up to 90.1% of them. Hypocitraturla and hypernatriuria could play an important role in the development and recurrence of urolithiasis. This data suggested that metabolic evaluation might be the useful tools for urolithiasis detection and prevention.

CMOS 연산 증폭기의 고장검출

한석붕,윤원효 慶尙大學校生産技術硏究所 1998 生産技術硏究所論文集 Vol.14 No.-

In this paper, a novel test method is proposed to detect hard and soft faults in CMOS operational amplifiers. Proposed test method makes use of the offset voltage, which is one of the op-amps specifications. During the test mode, CUT is implemented to unit gain op-amps with feedback loop. When the input is grounded, a good circuit has a small offset voltage, but a faulty circuit has a large offset voltage exceeding predefined range of tolerance. Using the proposed method, no test vector is required to be applied. Therefore the test vector generation problem is eliminated and the test time is reduced. The accuracy and effectiveness of the method is verified through HSPICE simulation.