요추추간판 수핵탈출증에 대한 편측견인의 치료효과

박지환,권혁수 대한정형물리치료학회 1995 대한정형도수물리치료학회지 Vol.1 No.1

Markolf and Morris suggests that the deranged disk and torn annulus have an exellent re-covery ability from the position of spine extension, where the posterior annulus is not under stress and the gel can move anterioly. McKenzie explains side gliding as a combination of rotaion and side bending, his clinical studies indicate that side-gliding can gel laterally. In conclusion, the prone unilateral traction on the opposite side from the patient's pain along with the other treatment appered to have helped reduce those patient's pain. The method of treatment described in this report is suggest-ed for Korean physical therapists who treat patients suspected of posterolateral herniated nu-cleus pulposus.

요통환자에 있어서 요부굴곡운동과 요부신전 운동의 치료효과 비교연구

권혁수,박지환 대한정형물리치료학회 1996 대한정형도수물리치료학회지 Vol.2 No.1

To compare the treatment effects of back execise on functional status, spinal mobility, SLR, pain severity, and treatment results satisfaction, and to determine whether spinal exercises during the low back pain reduces recurrent episodes of back pain. 1. Flexion and extension exercise groups did not differ in any outcome over 4weeks. After 1 week, both exercise groups had reduced disability score, a higher proportion returning to work, and fewer subjects with a positive SLR compared with the control group. 2. There was no difference among regarding recurrence of low back pain after 6~12 months. 3. There was no difference for any outcomes between the flexion or extension groups. However, either exercise was slightly more effective than no exercise when patients with low back pain were treated.

제지공정수 최적화를 위한 UF의 적합성 평가 및 응용

김형진,이지영,권혁윤 한국공업화학회 2004 응용화학 Vol.8 No.1

This study was carried out to evaluate the application possibility of UF Membrane System to papermaking industry in order to optimize the recycling of white water. In this study, for the efficiency test of UF modules, the MWCO(molecular weight cut-off) of the membrane was estimated by the COD measurement from UF filtrate water. From the rejection rate of membrane, three kinds of UF module were selected and evaluated in the factors of COD, SS, turbidity and flow rate.

돼지 미성숙 난포란의 회수 및 체외수정에 관한 연구

박성원,김정혁,홍승표,이지삼,정장용,박희성 진주산업대학교 농업기술연구소 1999 農業技術硏究所報 Vol.12 No.-

본 연구는 돼지의 체외수정에 있어서 난포란의 회수방법과 체외수정란 및 체외발달율을 조사하여 체외수정의 기본 원리를 밝히고자 본 연구를 수행하였다. 도축장으로부터 채집한 난소의 난포에서 흡입법, 세절법 및 흡입후세절법 등으로 난포란을 채취하여 등급별로 분류하여 회수율을 조사하였으며, 채취한 난포란은 액상정액과 정소상체미부 정액을 사용하여 체외수정을 시킨후 TCM-199 와 NCSU-23 배양액으로 체외배양을 실시하였다. 본 연구에서 얻은 결과를 요약하면 다음과 같다. 회수방법당 각각 37개의 난소에서 회수한 난포란의 수는 흡입법이 1,365개, 세절법이 1,884개 및 흡입후 세절법이 3.830개로써 난소당 난포란의 수는 각각 36.9, 50.9 및 103.5개로써 회수방법간에 유의적(P<0.05)인 차이가 있었다. 액상정액과 정소상체미부 정액을 사용하였을 때 수정율은 각각 83.0 및 83.% 로써 정액간에 유의적(P<0.05) 인 차이는 없었다. 체외수정이 이루어진 난자들의 분할율도 액상정액(60.8%) 과 정소상체미부 정액(69.0%) 간에 유의적(P<0.05) 인 차이는 없었다. 2-4세포기로의 발달율은 24.6 및 28.4%로써 배양액간에 위의적(P<0.05)인 차이는 없었으며, 상실배로의 발달율도 TCM-199 와 NCSU-23 배양액이 각각 14.8 및 24.5% 로써 이들간에 유의적(P<0.05)인 차이는 없었다. To improve the efficiency of in vitro production of embryos with follicular oocytes in pig, the recovery rates, in vitro fertilization and development, and the time required for collectng and processing oocytes by aspiration with or without slicing were evaluated comparatively. The oocytes were collected by aspiration of follicles(2-6mm) with or without slicing ovaries after aspiration, and classified into grade I-IV oocytes by the morpholoy of cumulus cells attached and the homogeneity of cytoplasmic granules. The grade Ⅰ-Ⅱ oocytes were matured invitro for 46 hours in TCM-199 and NCSU-23 supplemented with 1㎍/㎖ FSH, 2IU/㎖ hCG, 1㎍/㎖ estradiol-17 at 39℃ under 5% CO_2 in air. They were fertilized in vitro by epididymis sperm and ejaculated sperm treated with hypotaurin for 24 hours. and then the zygotes were co-cultured in vitro with pFF(porcine follicular fluid) for 7-9 days. The results obtained were as follows: The number of ocytes recovered per ovary was averaged 30.7 by aspiration, 50.8 by slicing and 103.5 by aspiration post slicing. The number of grade Ⅰ oocytes recovered was total 0.2% by aspiration, 0.1% by slicing and 0.1% by aspiration post slicing. The oocytes recovered per ovary was significantly(P<0.05) higher as recovery methods. The cleavage rates of the embryos obtained from 83.0(ejaculate sperm) and 83.1(epididymis sperm) respectively(P<0.05). In vitro developmental rates(9.9 and 18.6%) of embryos cultured in TCM-199 and NCSU-23 up to morula stage were non significantly(P<0.05) different between the culture media.

하악골에 발생된 Low grade 골육종:증례보고

조현이,정종철,김호성,최재욱,성대경,서지훈,김성범,이계혁 大韓顎顔面成形再建外科學會 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.1

Osteosarcoma is a primary malignant tumor arising most often in the long bone, but rare in jaw bone. Especially osteogenic sarcoma of the mandible is a rare tumor, comprising less than 0.5% of all head and neck tumors. Osteosarcoma occurs cheifly in young persons, and presenting very survival rates. Histopathologically this tumor can be classified three types, osteoblastic, fibroblastic, chondroblastic and classified from low grade to high grade by anaplasia or mitosis of the tumor cells. Sometimes, the exact diagnosis of osteosarcoma is difficult especially in low grade osteosarcoma, even if clinical or radiographical findings suggest to osteosarcoma. So suspcious to malignant bone tumor in clinical or radiological findings, biopsy should be taked from deep portion and multiple area, and sharing the patient history and radiographs with pathologist will assist in the development of the diagnosis. We report a case of low grade osteosarcoma on the mandible initially difficulty in accurate diagnosis. The patient visited our hospital for routine dental treatment but radiographic findings displayed ill-defined radiolucency with osteoid formation on the mandible. Final diagnosis was difficulty in initial biopsy but subsequent biopsy taked from deep portion presented infiltrative growth and mitosis of the tumor cell in some area with small osteoid bone formation, so we could reach final diagnosis as low grade sarcoma. We treated this patient with bloc resection of the mandible and immediate reconstruction with iliac corticocancellous block.

투명교정 시스템의 장점을 고려한 효율적인 임상적 적용

Hyeok Ji(Hyeok Ji) 연세대학교 치과대학 두개안면기형연구소 2023 연세임상교정 Vol.30 No.1

최근 브라켓/와이어 교정장치에 비해 심미적이고 편하다는 장점 때문에 투명교정장치를 이용한 교정치료에 대한 환자들의 관심이 급속도로 증가하고 있다. CAD/CAM system을 바탕으로 교정치료의 전과정은 이미 디지털화 되어 있고, 여러 교정 장치 중 투명교정장치가 이 과정에 최적화 되어 있으며 임상적으로 많은 장점을 가지고 있다. 투명교정장치는 장치의 역학적 장점을 최대한으로 이용할 수 있는 적절한 케이스 선택을 통해 다양한 케이스에서 기존의 브라켓/와이어 시스템에 비해 우수한 결과를 더 쉽고 빠르게 얻을 수도 있다. 또한 다양한 이유로 브라켓/와이어 시스템으로는 치료를 진행하기 어려운 증례에서 투명교정장치의 선택으로 치료가 가능해지는 경우도 있기 때문에 치료 가능한 환자의 범위가 확장될 수 있다는 것도 장점으로 꼽을 수 있다. 하지만 100% 환자 의존적으로 치료를 진행해야 하기 때문에 환자의 협조도는 치료의 성공을 위해 가장 중요한 열쇠이며, 투명교정장치를 의사가 얼마나 잘 이해하는지도 치료의 성공 여부를 좌우하는 요소 중 하나이다. 본 논문에서는 Invisalign Clear Aligner의 역학적, 임상적 장점을 고려하여 효율적으로 치료를 진행할 수 있는 다양한 사례를 살펴보고자 한다. Due to the advantages of being more esthetic and comfortable compared to traditional bracket/wire orthodontic appliances, there has been a rapid increase in patient interest in orthodontic treatment using clear aligners. The entire process of orthodontic treatment has already been digitalized on the basis of computer-aided design/computer-aided manufacturing (CAD/CAM) systems. Among various orthodontic devices, clear aligners are optimized for this process and have many clinical advantages. By selecting appropriate cases that maximize the mechanical advantages of clear aligners, superior results can be obtained more easily and quickly than with traditional bracket/wire systems in various cases. In addition, selecting clear aligners can expand the range of treatable patients, including cases in which treatment with bracket/wire systems may be difficult for various reasons. However, since treatment must be carried out 100% dependent on the patient, patient cooperation is the most important key to the success of treatment. The extent to which the orthodontist understands clear aligners is also one of the factors that determine the success of treatment. In this article, we aim to examine various cases that could be treated efficiently by considering the mechanical and clinical advantages of Invisalign clear aligners.

Changes in Sugar Content during Storage of Minituber ‘Superior’ as Related with Low Dose Gamma Radiation

Ji Hyeok Lim(임지혁),Jae-Sung Kim(김재성),Jun-Kwon Hwangbo(황보준권),Byung Yeoup Chung(정병엽),Myung-Hwa Baek(백명화),Jin-Hong Kim(김진홍) 한국원예학회 2003 한국원예학회 학술발표요지 Vol.2003 No.10

Forming Simulation and Experiment for Progressive Fabrication Process of Inner Fin in Heat Exchanger

Ji, Dong-Hyeok,Jung, Dae-Han,Jin, Chul-Kyu The Korean Society of Industry Convergence 2019 한국산업융합학회 논문집 Vol.22 No.4

In this study, a progressive process was performed to fabricate the inner fin of a high-efficiency heat exchanger. A forming simulation was also carried out on the concavo-convex of the inner fin, forming a simulation based on elastic-plastic finite element method. The forming analysis where the speed of the press descended and ascended was set to five seconds showed that the effective stress was at a maximum of about 69 MPa in the curved portion where the bending occurred. Therefore, the die was designed based on the simulation results, and the inner fin die was installed on the 400-ton capacity press. After that, the inner fin fabrication experiment was conducted under the same condition as the simulation. Crack was not found from the curved portion of the concavo-convex of the inner fin. The profile of the concavo-convex of the prepared inner fin measured 6.7~6.8 mm in depth, 2.65~2.7 mm in width, and 0.3 mm in thickness.

Real Time Data Analysis with In-memory computing in Amusement Park

Ji-hyeok Jeong,Tae-Gu Kang,Young-Real Kim 한국콘텐츠학회 2013 ICCC International Digital Design Invitation Exhib Vol.2013 No.12

Epiglottic Cyst Treated with Electrocautery: A Case Report

Ji Hyeok Choi,Sang Joon Lee,Phil-Sang Chung,Seung Hoon Woo 대한의학레이저학회 2022 MEDICAL LASERS Vol.11 No.1

Epiglottic cysts which usually occur on the lingual side of the epiglottis, are often benign lesions. This is a case report of a 40-year-old woman who visited our hospital and was found to have an epiglottic cyst during a gastroscopy procedure. We removed the epiglottic cyst via laryngo-microsurgery using electrocautery. After the surgery, the shape and function of the epiglottis were completely preserved, and complications such as aspiration symptoms did not occur. Therefore, it is believed that the procedure could be established as an alternative or complementary surgical method for the removal of epiglottic cysts.