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백태현,김환,이선구 국립7개대학공동논문집간행위원회 2003 공업기술연구 Vol.3 No.-
An experimental study for a crane hook was performed to investigate the stress distribution along a certain line where the maximum and minimum stresses to be developed. The crane hook was modeled into a 2-dimensional plate made of urethane rubber called 'Photoflex'. The materiel of Photoflex is very sensitive to a load and has low photoelastic fringe constant. The photoelastic techniques used in this experiment were the Tardy compensation method, the fringe thinning process and the 4-step phase shifting method. Experimental results by photoelasticity were compared with the stresses obtained from the simple curved beam theory and finite element analysis. All the results were close to each other.
Tae-Seok Jang(Tae-Seok Jang),Seung-Woo Lee(Seung-Woo Lee),Baek-Soo Lee(Baek-Soo Lee),Gyujo Shim(Gyujo Shim),Suyun Seon(Suyun Seon),Joo-Young Ohe(Joo-Young Ohe) 대한구강악안면외과학회 2022 대한구강악안면외과학회지 Vol.48 No.5
Objectives: During Le Fort I osteotomy, the separation of the pterygomaxillary junction (PMJ) is a difficult procedure for most surgeons because it is invisible. In this process, damage to the posterior structures constituting the sinus or those adjacent to it, including the maxillary sinus posterior wall and pterygoid plate, may occur. We would like to investigate the effects of this on the inside of the maxillary sinus after surgery and whether there are complications. Materials and Methods: One-hundred patients who underwent Le Fort I osteotomy from 2013 to 2020 using cone-beam computed tomography images were classified into two groups (clean-cut type and fractured type) according to the PMJ cutting pattern. In addition, the mucosal thickness in the maxil-lary sinus was divided into preoperative, postoperative three months, one year, and the change over the course of surgery was evaluated retrospectively. Results: Of the total 100 cases, the clean-cut type numbered 28 cases and the fractured type totaled 72 cases. Among the fracture types, part of the si-nus wall and the pterygoid plate were broken in 69 cases, and the maxillary sinus posterior wall was detached in three cases. There was no statistically significant difference in sinus mucosal thickening between the clean-cut type and fractured type of the PMJ, three months and one year after surgery between the two groups. However, there was a significant difference in sinus mucosal thickness at postoperative one year in the case where a partial detachment of the maxillary sinus posterior wall occurred compared to not. Conclusion: Even if there is some damage to the structures behind the PMJ, it may not be reasonable to spend some time on the PMJ separation pro-cess considering the overall postoperative complications, if there is no significant difference inside the sinus, or increased probability of postoperative complications.
한열변증 설문지와 일반적 건강 검진 결과와의 상호 연관성에 관한 비교 연구
백태선 ( Tae-seon Baek ),박영재 ( Young-jae Park ),박영배 ( Young-bae Park ),박재형 ( Jae-hyung Park ),임재중 ( Jae-joong Im ) 대한한의진단학회 2005 大韓韓醫診斷學會誌 Vol.9 No.2
Background and purpose: The cold-heat patternization is one of the most frequently use for diagnostic method in oriental medicine, But it is still an unclear scientific mechanism and the objective index. the aim of this study is to search the objective index of the cold-heat patternization, comparing with ordinary health test. Method: The study group comprised 101 Korean, male:female ratio 51:50, with a mean age of 49.74 years, The results of the questionnaires for cold-heat patternization were compared with the western health test that it consist of height, weight, muscle mass, body fat, WBC, Hb, ALT, AST, TG, Total cholesterol, glucose, HDL-cholesterol, free-T4 and TSH, measured in the health promotion center of the hospital of Chungnam university Result: The cold patternization were significantly higher in the women than the man, The somothing of the questionmaires for the heat patternization were positive correlated with TG, TSH, glucose, Hb, free T4, weight, musle mass(p<0,05), But there were no correlation in the gross. The somothing of the questionnaires for the cold patternization were negative correlated with the weight, musle mass, body fat, glucose, Hb and ALT(p<0.05), Especially there were strong negative correlation with the weight and muscle mass(p<0.01). Conclusion: The present study shows there is no definitive index for the cold-heat patternization in the ordinary health test. But the weight and muscle mass can be useful index of the cold patternization.
양태선 ( Tae-seon Yang ),우종태 ( Jong-tae Woo ),황인백 ( In-baek Hwang ) 한국구조물진단유지관리공학회 2008 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.12 No.1
In metropolitan tunnel red sedimentation substance is composd of Fe, CaCO<sub>3</sub>, SO<sub>4</sub><sup>2</sup> etc. The ground water in tunnel drain contains brown and dark yellowish black color, also. In case of white sedimentation substance, the most frequently founded ingredient is CaO. This substance is doesn't affect safety of a tunnel.
Kim, Tae Sung,Jung, Ki Kyung,Kim, Soon Sun,Kang, Il Hyun,Baek, Jung Hee,Nam, Hye-Seon,Hong, Soon-Keun,Lee, Byung Mu,Hong, Jin Tae,Oh, Ki Wan,Kim, Hyung Sik,Han, Soon Young,Kang, Tae Seok Taylor Francis 2010 Journal of toxicology and environmental health. Pa Vol.73 No.21
<P>The purpose of this study was to determine the effects of di(n-butyl) phthalate (DBP) administration on male reproductive organ development in F1 Sprague-Dawley rats following in utero exposure. During gestation days (GD) 10-19, pregnant rats were administered daily, orally, DBP at 250, 500, or 700 mg/kg or flutamide (1, 12.5, or 25 mg/kg/d) as a positive control. The male offspring were sacrificed at 31 d of age. DBP and flutamide dose-dependently significantly increased the incidence of hypospadias and cryptorchidism in F1 male offspring. The weights of testes and accessory sex organs (epididymides, seminal vesicles, ventral prostate, levator ani plus bulbocavernosus muscles (LABC), and Cowper's glands) were significantly reduced in DBP-treated animals. Furthermore, cauda agenesis of epididymides and ventral prostate atrophy were observed in high-dose 700-mg/kg DBP males. Anogenital distance (AGD) and levels of dihydrotestosterone (DHT) and testosterone were significantly decreased in the DBP (700 mg/kg/d)-treated groups. In particular, the expression of androgen receptor (AR) and 5관-reductase type 2 in the proximal penis was markedly depressed following administration of DBP (700 mg/kg/d) or flutamide (25 mg/kg/d). The expression of sonic hedgehog (Shh) in the urethral epithelium of the proximal penis was significantly less in the DBP (700 mg/kg/d)- or flutamide (25 mg/kg/d)-treated groups. In addition, DBP dose-dependently significantly increased the expression of estrogen receptor (ER 관) in the undescended testis. Data demonstrated that in utero exposure to DBP produced several abnormal responses in male reproductive organs, and these effects may be due to disruption of the stage-specific expression of genes related to androgen-dependent organs development.</P>