A Systematic Review and Meta-Analysis of Arthroscopic Meniscus Repair in Young Patients: Comparison of All-Inside and Inside-Out Suture Techniques

Dong­Geun Kang,Young­Jin Park,Jae­Ha Yu,Jong­Byung Oh,Dong-Yeong Lee 대한슬관절학회 2019 대한슬관절학회지 Vol.31 No.1

Purpose: The purposes of the present study were to review published studies that investigated arthroscopic meniscus repair to treat meniscus injury in young patients and to compare all­inside and inside­out suture techniques.Methods: Various electronic databases were queried for published articles, and this search was updated in August 2017 for evaluating the outcomes of arthroscopic meniscus surgery in young patients. Data search, extraction, analysis, and quality assessment were performed according to the Cochrane Collaboration guidelines, and the clinical outcomes were evaluated using various outcome values in young patients according to suture techniques.Results: Three randomized controlled trials and three prospective comparative studies were included in this systematic review and meta­analysis. There were no significant differences in clinical outcomes such as meniscus healing rate (risk ratio [RR], 1.11; 95% confidence interval [CI], 0.90 to 1.37; I2=39%) and perioperative complications (RR, 0.62; 95% CI, 0.23 to 1.72; I2=43%) between all­inside and inside­out techniques for meniscus repair.Conclusions: The present study shows favorable results for clinical outcomes such as meniscus healing rate and perioperative complications in young patients. Furthermore, based on our results, both all­inside and inside­out meniscal suture techniques are equally effective in these patients.

Lightweight Printed Dipole Antenna Array With 3×2 Beamforming Network for Wide UAV Communication Coverage

Dong‑Geun Seo,Jeong‑Soo Park,Gun ‑Ki Lee,Wang‑Sang Lee 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.4

In this paper, a lightweight printed dipole antenna array with 3×2 beamforming network for wide unmanned aerial vehicle (UAV) communication coverage is presented. The proposed antenna consists of an upper substrate, a lower substrate, and two supports with a microstrip feeding. The upper substrate has a two-element printed dipole antenna array, and the lower substrate includes a beamforming feeding circuit and a ground plane as a refector of the proposed antenna array for gain improvement. For wide beam coverage, the proposed feeding network consists of three RF switches, one Wilkinson power divider, and one 90° hybrid coupler, and generates the wide beam using one broadside beam and two end-fre beams. Measured impedance bandwidth, peak gain, and half-power beamwidth (HPBW) of the proposed array operated from 5.03 to 5.15 GHz are approximately 2 GHz, 4.3 dBi, and 155°, respectively.

플라즈마 표지소자의 제작

이상윤,라병욱,박동수,황인헌,이덕동,신영남,박성배,이동욱,박용석,박형근,손상호,권태근,채경락,정경득 慶北大學校 自然科學大學 1986 自然科學論文集 Vol.4 No.-

An Ac-type Plasma Display Panel (PDP) operating with Ne-Ar(0.1%) Penning mixture gas is fabicated. The characterics of the panel with electrodes covered with thin and thick dielectric layers are studied. The brightness of the Neon-orange light emitted by the panel measured as function of applied voltage and frequency. As an application, a graphic display system equipped with PDP showing still and moving pictures is made.

한국인 직무 스트레스 측정도구의 개발 및 표준화

장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.

현대국어 흉내말의 통사ㆍ의미 특성 연구

박동근 건국대학교 1996 대학원 학술논문집 Vol.43 No.-

This study is to investicate the syntactic properties of the symbolic words in modern Korean on the basis of relevance with semantic properties of the symbolic words. First, I showed that the symbolic words are realized as various categories, and overviewed the syntactic properties of the symbolic words in each category which the symbolic words are as. Next, I took the symboic forms of high frequency as the object of my inquiry, and statcically examined the aspects that they are realized in sentences as free forms or derived forms. The conclusions are as follows: 1.A symbolic word is not a categorial type, but a object at the lexical level. Symbolic words exist in various categorial types. 2. As a result of examining a modified word and an object word(this term means the expression of the object that a symbolic word corresponds to in the real world), I came to the following conclustions. there are symbolic words with extremely limited modified and object words and symbolic words of the open types with modified and object words. The degree of restriction on the modified and the object word is related to the semantic properties of the symbolic words. The more concrete a symbolic word is, the more restricted a modified word and a object word is. 3. As a result of investigating sentence types and the position of the symbolic words in the sentences, it is clear that the position of the adverbial symbolic words generally are at the front of the modified words. The higher the ratio of the restriction on the modified, the higher this tendency is. 4. The symbolic words with the vowel opposition and the consonantal opposition have differences in the linguistic sense as well as differences in the semantic domains and these appear as the differences of the syntactic properties

'-하다, -대다, -거리다, -이다' 연구(1) : word formaton rules with symbolic words by their morphosynthetic properties 흉내말과의 형태ㆍ통어론적 특성에 따른 결합 규칙 -

박동근 건국대학교 1994 대학원 학술논문집 Vol.38 No.-

This thesis. as a composite study on '-hada, -taeda, -koˇrida, -ida' which combine symbolic words to form verds or adjectives, aims to specify word formation rules and their constraints with respect to morphosynthetic properties of these four morohemes and symbolic words. (1)'-hada' is the most productive form of the four. When combining with active symbolic words. it derives adjectives, and when combining with stative ones, it derives verds. The most evident characteristic in its combining with symbolic words is that symbolic forms should be free in principle. rulel: [XX] → 1) [[XX]-hada] v/abj 2)[[X(X)]-hada]v/adj constraint: if X is not free, then 1) and if X free, then 2)ruel2: [X] → [[X]-hada]v/ad constraint: 'X' is 'A' type or 'AB' type with no reduplicated form. (2)'-koˇrida' and '-taeda' derive verds by combining with symbolic words. The morphosynthetic properties in combining symbolic words with '-koˇrida', '-taeda' are the same. rule: [XX] → [[X(X)] -koˇrida/taeda]v constraint: if 'X' is 'A' type, then the truncation rule is not applied. (3)'-ida' derives verds by combining with symbolic words. It is most affected by distributional restrictions, and not productive. rule:[XX] → [[X]-ida]v constraint: 'X' must be 'AB' type necessarily. As a whole, bound forms evolve from free forms. These four forms show differences in the degree of boundness, such as '-hada< -taeda< -koˇrida< -ida'.

정상임신 산모와 중증자간전증 산모의 혈소판지수 비교

박용범,한지수,정동근,이인식,김암,민원기,지현숙,목정은 울산대학교 의과대학 1993 울산의대학술지 Vol.2 No.1

The purpose of this retrospective study was to define platelet indices in severe preeclampsia(N=98) and to compare them to normal nonpregnant values(N=93) during the years 1990-1993 in the Department of Obstetrics and Gynecology, College of medicine, University of Ulsan, Asan Medical Center. Indices evaluated included platelet count, mean platelet volume, and platelet distribution width. Means platelet volume was statistically different between two groups, however mean platelet count was significantly decreased(p=0.029) and platelet distribution width was significantly increased(p=0.0001) and platelet distribution width was significantly increased(p=0.0001) in severe preeclampria. Mean platelet volume versus platelet count in normal pregnancy showed a significant inverse nonlinear relationship(r=-0.39, 9<0.001) and that in preeclampsia was congruent with notmal nonpregnant valus. With same mean platelet volume, platelet distribution width showed tendency to shift to right in severe preeclampsia. These findings support the concept of severe preeclampsia as a compensated state of increased platelet comsumption comparing with normal pregnancy. We concluded from above results that quantification of platelet indices may have some value in screening for and following severe preeclampsia.

턱걸이(Pull-up) 수행 시 숙련자와 비숙련자의 근육사용 차이에 관한 운동학적 연구

임동찬,임지환,박건우,박근표,이광수 순천향대학교 기초과학연구소 2022 순천향자연과학연구 논문집 Vol.28 No.1,2

This study was conducted to find out the difference in the use of latissimus dorsi muscle and forearm muscles between skilled and unskilled people when performing pull-up. The subjects of the study were one skilled in the department of sports science at Soon-chun-hyang University, one unskilled person who had no problems with the musculoskeletal system over the past year, and a total of two people who could do pull-ups more than 20 times. A total of one experiment was conducted, and two tests were conducted. The electromyogram data of the light back and forearm muscles were compared using a wireless electromyogram measurement device (EMG). As a result of the study, first, when performing pull-up, the unskilled person performed the movement with the strength of the forearm muscle rather than the light back muscle compared to the skilled person. Second, when performing pull-up, the skilled person showed similar use of force in both pull-up movements, and for non-skilled people, the activity of the forearm muscle in the second movement was significantly increased.

통신언어의 생성 방식에 따른 생산성 연구

박동근 한말연구학회 2003 한말연구 Vol.- No.12

Though net lingo seems to be indiscreet in a sense, it develops with a regular paradigm because it is also a way of communication. The paradigm of net lingo is influenced by people' s consciousness, and this is a main reason why linguists pay their attention to the study of net lingo. This study is about relations between the degree of the productivity of net lingo and the morphological properties of it. The conclusion of this study is described as follows. First, in the formation of net lingo, variations are mainly found in adverbs and exclamations and have high productivity in conjunctions and greeting words. Second, in case that we make new words through compounding or affixation, some specific stems or affixes, including -bang, -jul, or -ding, have high productivity. Third, new words made by root formation are almost symbolic words. Forth, in the formation of net lingo, endings have higher productivity than particles have. Fifth, the variants which add consonants to the end of an ending have difference in their productivity following the order of the consonants, which is 'ㅇ>ㅁ>ㅅ>ㅂ>ㅋ'

축산폐수로 인한 하천수 및 퇴적토 오염의 지표세균으로서 분변성 연쇄상구균

박성주,이동근,김상종 대전대학교 기초과학연구소 1997 自然科學 Vol.8 No.2

경안천에서 양돈단지 폐수가 유입되는 소하천의 3개 정점의 분변성 대장균(fecal coliforms;FC)과 분변성 연쇄상구균(fecal streptococci; FS)의 평균비(FC/FS ratio)는 하천수에서 7.4, 퇴적토(sediment)에서 2.9로서 생활하수에 비하여 상대적으로 훨씬 낮은 값을 나타내었다. 이들 정점의 하천수와 퇴적초에서 분리된 분변성 연쇄상구균 균주가운데 가축에서만 기원되는 Streptococcus bovis 와 S.avium이 전체의 37.6%를 차지하였다. 이러한 결과는 경안천이 축산폐수에 의하여 오염되고 있으며, 이러한 축산폐수의 오염을 밝혀주는 지표미생물로서 분변성 연쇄상구균이 유용하게 사용될 수 있음을 보여 주었다. 동시에 분변성 연쇄상구균은 퇴적토에서 생존력이 강하므로 축산폐수에 의한 수역의 수질오염을 평가한 때는 물뿐만 아니라 퇴적토도 같이 조사해야 할 필요가 있다. The mean ratios of fecal coliforms to fecal streptococci at three sampling sites in small tributaries of the Kyongan Stream receiving livestock wastewater were 7.4 for water and 2.8 for sediment. These values are much lower than that of the domestic sewage. Of the fecal streptococcal isolates from water and sediment samples at these three sites. Streptococcus bovis and S. avium occupied 37.6%. These findings represent that the Kyongan Stream be polluted by the livestock wastewater and fecal streptococci be a useful indicator microorganism for assessing livestock wastewater pollution. In addition, it is recommended that bacterial assay in sediment as well as water be proceeded in water pollution studies by livestock wastewater as fecal streptococci have much stronger survivability in sediment than in water.