HDPE 개질 아스팔트 혼합물의 강도 및 변형특성

김광우,이기호,권오선,고태영 강원대학교 부설 석재복합신소재 제품연구센터 2004 석재연 논문집 Vol.9 No.-

본 연구는 폐비닐 펠렛을 도로포장재료로 재활용하여 자원절약 및 아스팔트 혼합물의 품질향상을 위한 연구이다. 이를 위하여 폐비닐의 첨가량별 배합설계를 수행하여 적정 폐비닐 첨가량과 최적 아스팔트 함량으로 편마암과 화강암 2가지 골재와 폐비닐인 RHDPE의 함량을 4가지로 혼합물을 제작하여 8종류의 재질 혼합물과 2종류의 무개질 혼합물을 제작하였다. 그리고 이 공시체에 대하여 마샬안정도, 간접인장강도 및 Kim test와 반복주행시험 등 실내시험을 통하여 혼합물의 특성을 분석하였다. 폐비닐 첨가량은 RHDPE가 8%일 때 안정도와 간접인장강도 모두 가장 우수한 것으로 나타났고 취성도 나타나지 않았다. RHDPE를 첨가한 혼합물에 대하여 Kim test를 수행한 결과 DR과 DS 모두 높은 상관성을 보였다. 그리고 반복주행시험에서는 RHDPE를 첨가한 혼합물이 일반 혼합물보다 우수하였다. 향후 많은 실험을 통해 RHDPE의 우수성을 입증한다면 소성변형 저항성에 우수한 재료로 이용될 수 있을 것이다. This study is a fundamental research for recycled high-density polyethylene (RHDPE) in asphalt mixture for improving roadway pavement. Marshall mix design was conducted and optimum asphalt content(OAC) was determined for dense-graded surface course mixture by RHDPE content. Marshall stability test, indirect tensile strength (ITS) test, wheel tracking trest and Kim-test were carried out to measure the characteristics of RHDPE-added asphalt concretes. From the results of this study, RHDPE in asphalt mixture if possible. It could be considered that adding too much RHDPE in asphalt mixture is not proper. The optimum content of RHDPE was appeared to be 8%. In Kim-test, statistical analysis was performed for each loading head and aggregate to find out correlation between S_(D) values and each rut parameter. The analysis result showed that S_(D) had very high coefficient of determination with rut parameters on the average.

Clinical Outcome of Modified Cervical Lateral Mass Screw Fixation Technique

Kim, Seong-Hwan,Seo, Won-Deog,Kim, Ki-Hong,Yeo, Hyung-Tae,Choi, Gi-Hwan,Kim, Dae-Hyun The Korean Neurosurgical Society 2012 Journal of Korean neurosurgical society Vol.52 No.2

Objective : The purpose of this study was 1) to analyze clinically-executed cervical lateral mass screw fixation by the Kim's technique as suggested in the previous morphometric and cadaveric study and 2) to examine various complications and bicortical purchase that are important for b-one fusion. Methods : A retrospective study was done on the charts, operative records, radiographs, and clinical follow up of thirty-nine patients. One hundred and seventy-eight lateral mass screws were analyzed. The spinal nerve injury, violation of the facet joint, vertebral artery injury, and the bicortical purchases were examined at each lateral mass. Results : All thirty-nine patients received instrumentations with poly axial screws and rod systems, in which one hundred and seventy-eight screws in total. No vertebral artery injury or nerve root injury were observed. Sixteen facet joint violations were observed (9.0%). Bicortical purchases were achieved on one hundred and fifty-six (87.6%). Bone fusion was achieved in all patients. Conclusion : The advantages of the Kim's technique are that it is performed by using given anatomical structures and that the complication rate is as low as those of other known techniques. The Kim's technique can be performed easily and safely without fluoroscopic assistance for the treatment of many cervical diseases.

비만 여성을 대상으로 한 해조류 추출물의 국부처치와 운동 병행을 통한 지방분해 효과의 임상적 검정

서태수,이인숙,변재철,김규호,박승한,김유영,김상국,김현정,김상기,신동철,성미영,박종석,김종기,박언휘 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.3

This study was carried out to test the body fat breakdown during topical seaweed extract treatment and in combination with the aerobic exercise. Of 20 female obesity subjects, ten treated a cream types of seaweed extract(control group) and ten treated a placebo cream(placebo group). Topical treatment of each sample was designed for 4 weeks, and treated with 2 times a day about 10ml on the abdomen and the thigh, respectively. All subjects were participated aerobic dance half hour a day and four times a week. After 4 weeks of topical treatment and exercise, they were measured body fat, skinfold thickness, body circumference. Then venous blood samples were taken and analyzed blood cells, serum enzymes, and serum lipids. There were reduction of body weight, % of body fat, antebrachium, brachium, chest, waist, thigh circumference and abdomen thickness between pre and post treatment in both group. Especially, body weight and % of body fat significantly reduced in the subjects treating the seaweed extract than those treating the placebo. There were significant decrement in total cholesterol and LDL whereas increment in HDL and TBIL in the control group, but no significant difference in the placebo group. In conclusion, there were 7.6% of body fat reduction during 4 weeks of aerobic exercise and 21% of body fat reducement in combination of topical seaweed treatment and exercise, respectively. These results suggest that the topical treatment of seaweed extract should be very effective for fat breakdown. Especially, the body fat breakdown maximized in the combination with the topical seaweed extracts treatment and the aerobic exercise.

한의진단명과 진단요건의 표준화 연구 III : 3차년도 연구결과 보고

최선미,양기상,최승훈,박경모,박종현,심범상,김성우,노석선,이인선,정진홍,이진용,김달래,임형호,김윤범,박성식,송태원,김종우,이승기,최윤정,신순식 한국한의학연구원 1997 한국한의학연구원논문집 Vol.3 No.1

The diagnostic requirements were suggested and explained regarding the systems of differentiation of symptoms and signs in the third year study of standardization and unification of the terms and conditions used for diagnosis in oriental medicine. The systems were as follows : - analyzing and differentiating of epidemic febrile disease - analyzing and differentiating in accordance with the Sasang constitution medicine based on four-type recognition - differentiation of disease according to pathological changes of Chong and Ren channels - standards for diagnosis of women's disease - standards for diagnosis of children's disease - standards for diagnosis of motor and sensor disturbance (-muscle. born, joint, etc.) - standards for diagnosis of neuropsychiatric disease - standards for diagnosis of five sense organ disease - standards for diagnosis of external disease The indivisual diagnosis pattern was arranged by the diagnostic requirements in the following order : another name, notion of diagnosis pattern, index of differentiation of symptoms and signs, the main point of diagnosis, analysis of diagnosis pattern, discrimination of diagnosis pattern, prognosis, a way of curing a disease, prescription, herbs in common use, disease appearing the diagnosis pattern, documents. The standards for diagnosis of each disease was arranged by the diagnostic requirements in the following order : another name, notion of disease, the main point of diagnosis, analyzing and differentiating of disease, analysis of disease, discrimination of disease, prognosis, a way of curing and prescription of disease, disease in western medicine appearing the disease in oriental medicine, documents.

한국정부와 민단의 협력과 갈등관계

김태기 전남대학교 아시아태평양지역연구소 2000 아시아태평양지역연구 Vol.3 No.1

이 연구는 이승만 정권이 성립되는 1948년부티 박정희 정권이 무너지는 1979년 말까지에 있어서의 한국정부의 재일한국인 정책과 민단과의 관계를 다룬 것이다. 특히 민단에 대하여 한국정부가 어떠한 정치적 의도를 가지고 관여하였으며, 그것이 현재의 민단체제에 어떠한 영향을 끼치게 되었는지를 실증적으로 고찰하는 것이 과제라고 할 수 있다. 이승만 정권의 재일한국인 정책에 있어서는, 정부 수립 이후 신생국가 한국정부가 제일한국인문제를 어떠한 시각에서 보고, 어떠한 정리를 강구 하였는지를 살펴보았다. 박정희 정권의 재일한국인 정권에 있어서는, 군사혁명이라는 부담을 안고 출발한 박정희 정권 초기와 유신체제 및 문세광 사건 이후 한국정부가 민단조직에 어떠한 형태로 관여하고, 민단 지도층은 어떠한 정치적 선택을 하였는지를 중심으로 고찰하였다. 결론적으로 이 연구는 한국정부가 반공정책 및 유신체재의 유지라는 정치적 의도에서 민단이라는 조직이 강화되고 변화되어 왔기 때문에, 한국 정부의 입장에서는 소기의 정회적 목표를 달성했다고 할 수 있으나, 그 결과 재일한국인 문제를 주도적으로 해결할 수 있는 단체로서의 역할을 충분히 하지 못하고 있는 현재의 민단을 낳게 되었다는 점을 지적하고 있다. 최근의 젊은 세대의 민족적 아이덴티티의 상실로 인한 재일한국인 사회의 분열이 확산되고 있는데, 이러한 문제에 민단이 능동적으로 대처하고 있다고 볼 수 있다. 즉 이러한 민단의 현실에는 한국정부는 적지 않은 책임이 있으며, 앞으로 이에 대한 시급한 대책의 필요성을 이 연구는 제기하고 있다. This study deals with the relationship between the Korean government Policies for the Korean residents in Japan and the Residents 'Association from 1948, when the Government of President Lee Seung-Man was established, to the end of 1979, when the Government of Park Chung-hee collapsed. 'With what Political intentions has the Korean government engaged in the Association of Korean Residents in Japan?' 'How does the engagement influence the current system of the Korean Residents' Association?' The demonstrative verification of the two questions mentioned above are the subjects of this study. At first the study examines what kind of prejudices the Korean government has about foreigners and which policies the government devises. What was the government part in the Korean Residents' Association and what political decisions were made by the leaders of the association in the beginning of Park Chung-hee's government launched from a military revolution in the era of Revitalizing Reforms System and after the political affair of Mun Se-kwang? Those questions are focused upon the investigation of the policies of Park Chung-hee's government. The Association of the Korean Residents in Japan has been strengthened and changed according to the political intentions of Korean government for the anti-Communist policy and the maintenance of the Revitalizing Reforms System. From the standpoint of the Korean government its proposes were achieved. However, the Korean Residents' Association could not carry out its roles successfully as the leading organization pushing to solve the problems of Korean residents in Japan. This study Points out this issue. Recently the division of the Korean residents' society in Japan has been extended due to the young generation's loss of racial identity. The Association has not actively coped with the matter. Much of the blame for the current circumstances may belong to the Korean government This study suggests that an assessment of this matter must be made without further delay.

남원시 생활하수가 요천 수질오염에 미치는 영향에 관한 연구

김환기,김태근,이영우 全北大學校 附設 都市및環境硏究所 1995 都市 및 環境硏究 Vol.10 No.1

The Yo stream(drainage area: 526.08㎢, length: 52.0㎞) is one of the branchs of the Seom Jin river. In order to evaluate effects of the sewage in Nam-Won City(I) on the water pollution of the Yo stream, water qulity analysis and estimate the pollutant discharge rate were carried out at six sites in the Yo stream basin from December 1994 to September 1995. The results of research are summarized as follow: 1. According to the water quality of six sites evaluated by BOD, ST1 is classified into I grade, ST2 and ST3 are II grade, ST4∼ST6 sites are III grade. 2. Amount of total BOD load from the Yo stream basin was estimated 11,810㎏/day of which 13.9% was contributed by land, 0.1%, was contributed by industrial waste water, 43% was contributed by population and livestock, respectively. 3. As Nam-Won city(I), discharge rate and effluence rate of BOD, SS were estimated 28.4%, 10.6% and 20.6%, respectively. 4. Since Nam-Won city sewage treatment plant started operation, BOD, SS reduction rate of Nam-Won city(I) were forecasted 36.1% and 20.6%, respectively.

위암환자의 생존율에 관한 역학적 조사연구

김덕성,이태용,이영수,류기하 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.2

To find out the survival rates of stomach cancer patients, the author studied 288 stomach cancer patients who took operation at the Department of Surgery in Chungnam National University Hospital from January 1, 1985 to December 31, 1991. The results were as follows: 1. Of the total patients, 67.4% were male: but 32.6% were female. 2. 64.6% of patients lived in rural area and 35.4% urban;98.3% of those were married; 30.6% were farmers and 17.4% were commercial workers; 54.5% were smokers; 48.3% were alcohol drinkers. 3. By types of gastric cancer, 84.4% were progressive gastric cancer patients. Among these, type 2 patients were more than other type patients. 61.5% of those had metastasis to lymph node. 55.2% of those took operation by RSG with gastrojejunostomy; 97.6% of those knew that they had cancer; 19.1% of those had a family history that at least one of family members had cancer. 4. The gross 5 year survival rate of total patients was 47.2%. 5. The 5 year survival rate of male patients was 41.6% but that of female was 46.3%. The 5 year survival rates by residential area, chemotherapy, marital status, blood type, family history, smoking, and drinking were not significantly different. 6. The 5 year survival rate of type 2 progressive gastric cancer patients was the highest with the rate of 72.0%. Metastasis to lymph node and type of operation showed statistically significant difference in 5 year survival rates.

고속가공시 다중센서를 이용한 가공상태 감시 기술

김전하,강명창,김정석,나승표,김기태 한국공작기계학회 2000 한국공작기계학회 추계학술대회논문집 Vol.2000 No.-

The high hardened materials that are remarkable in aspects of durability have been used for die and mold industry. As the high hardened materials are hard to machine, the high-speed machining is essential to manufacture these materials. Currently, in the general turning and milling, experiments to the tool wear monitoring have studied, but those have not applied in high-speed machining. In this study, the cutting mechanism was analysed by the cutting force according to cutting conditions, and the parameters to monitor the tool wear were selected from the tendency of the cutting force and acceleration according to cutting length in the high-speed machining of the high hardened materials(STD11).

대식세포주 RAW264.7에서 Nitric oxide에 의해 과발현되는 CD53의 기능분석

김태림,이혜영,김인규,백상기 충남대학교 생물공학연구소 2004 생물공학연구지 Vol.10 No.2

The CD53 antigen is a member of the tetraspanin membrane protein family that is expressed in the lymphoid-myeloid lineage. It is highly expressed in Radio-resistant tumor cells. Recently, it was reported that CD53 associates with the GSH-metabolizing protein γ-glutamyl transpeptidase. Its biological roles however remains unknown. Macrophages activated by microbial lipopolysaccharides (LPS) produce a burst of nitric oxide and reactive oxygen species. Nitric oxide plays important roles in macrophage activation as a toxic agent towards infectious organisms, an inducer or suppressor of apoptosis or an immunoregulator, whether nitric oxide can induce or inhibit apoptosis is highly dependent on different cell types at different stages of the inflammatory process. Using cDNA microarrays, we identified CD53 as one of the principal genes up-regulated by exposure of macrophages to LPS. We found that mRNA and protein levels of CD53 were increased by nitric oxide as well as LPS treatment in macrophages. Cells stably transfected with sense CD53 cDNA had lower levels of peroxide, and were more resistant to γ-irradiation. The stably transfected RAW264.7 cells with antisense CD53 recombination had the opposite properties. Activation of CD53 by cross-linking with monoclonal anti-CD53 antibody (OX-79) showed the expression of the inducible nitric oxide synthase. We propose that the induction of CD53 is one of major self-protection mechanisms of macrophages against LPS induced-oxidative stress and irradiation.

비호지킨 림프종의 임상적 고찰

김태원,조은택,조기섭,정재용,허재봉,장영,박유환,정춘해 조선대학교 1995 The Medical Journal of Chosun University Vol.20 No.1

A retrospective clinical and histologic study of 30 non-Hodgkin's lymphomas diagnosed at the Department of Hemato-oncology of the Chosun University from January 1989 to December 1993 is presented. Among total 30 cases whose sexes were mentioned, male were 18 and female were 12 and the ratio is 1.5:1. The peak incidence of non-Hodgkin's lymphoma was found in the third decade. The case distributions by Working formulation were summarized in table 3. The most common histopathologic type of non-Hodgkin's lymphoma was the diffuse large cell type of intermediate grade. The presenting symptoms at the time of first visit to the hospital were summarized in table 4. The most common symptoms were palpable mass. Lymph node enlargements were found in 87 %, and most frequently on cervical area(35%). The incidence of primary nodal lymphoma is more frequent than extranodal lymphoma, 1.2:1. The most common primary site of extranodal lymphoma is the gastrointestinal tract. In the laboratory findings, the data of hemoglobin and hematocrit were summarized in table 8, 9, Values of hemoglobin and hematocrit of female patients greater than those of male patients. The results of the immunophenotypings of nodal and extranodal lymphoma indicates that the B-cell lymphoma are predominant(B:T=1.4:1). The clinical stage was Ⅱ in 9 cases(30%) Ⅲ in 9 cases(30%), Ⅳ in 8 cases(26.7%), Ⅰin 4 cases(13.3%), 28 cases were treated with CHOP regimen. Among them, 17 cases(60.8%) achieved a complete remission. 5 cases had a partial response. The most frequent toxicities were toxic hepatitis.