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치과 임플란트 수술용 고출력 초음파 수술기 설계 및 제작
김나리,전대우,김진호,김선욱,황종희,이정배,최성재,임대진,이영진,Kim, Na Ri,Jeon, Dae Woo,Kim, Jin Ho,Kim, Sun Woog,Hwang, Jong Hee,Lee, Jeong Bae,Choi, Sung Jae,Im, Dae Jin,Lee, Young Jin 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.10
This paper presents the design and fabrication of a high power piezoelectric ultrasonic surgery unit for multi-purpose dental implantation. A conventional piezoelectric ultrasonic surgery units consists of a transducer and a tip. However, the drawback of this simple structure is that the output performance of the transducer considerably changes with the change of the tips. An ultrasonic surgery unit that has an additional booster between the transducer and the tip can solve this problem to some extent; for this, an optimal structural design for the transducer is required. We used the Bolted Langevin Transducer (BLT) as the basic transducer; it consists of piezoelectric ceramics and a metal body. It's structure was optimized using mathematical methods to determine the length and radius of the tail and head masses. Additionally, the booster was also subjected to the same methods. Using these mathematical methods, optimal results in terms of the resonance frequency (24.96 kHz), displacement ($14.27{\mu}m$), and pressure (2.8 MPa), could be obtained. The validity of this proposed surgery unit was confirmed experimentally, exhibiting a cutting force of around 7% higher than that of a conventional surgery unit.
뷰티산업 프랜차이즈의 내부마케팅이 직무만족, 직무몰입 및 직무성과에 미치는 영향 연구 : 피부미용서비스 종사자 중심으로
김현주(Hyun-Joo Kim),임대진(Dae-Jin Lim) 한국인체미용예술학회 2021 한국인체미용예술학회지 Vol.22 No.4
This study attempted to investigate the influence of internal marketing on cosmetologists’ job satisfaction, job commitment, and job performance in beauty franchises, which are highly dependent upon human resources and have a goal of enhancing their competitiveness. A questionnaire survey was performed among 500 workers from beauty franchise stores from November to December 2017. Among 413 questionnaires returned, 320 copies, excluding poorly answered ones, were used for final analysis. The collected data were analyzed by frequency analysis, factor analysis, correlation analysis, and reliability, using SPSS 22.0. In addition, confirmatory factor analysis and structural equation modeling were conducted with AMOS 21.0, and the results found the following: First, as compensation system, support from the management and empowerment were higher, job satisfaction increased. Second, when education & training and compensation rose, job commitment was higher. Third, as job satisfaction improved, job commitment increased. Fourth, when job satisfaction was higher, job performance was greater. Fifth, as job commitment rose, job performance increased. The implications of this study are as follows: First, according to confirmatory factor analysis, the compensation system was the highest, followed by empowerment and support from the management in terms of explanatory power. In other words, it is required to suggest a human resources management plan by factor during human resources management strategy planning. Second, because education & training affected job commitment, there is a necessity to provide self-development programs. Third, it is necessary for beauty franchise owners to understand the importance of human resources development and become active in investment and assistance.
복강내 및 복강외 방광파열과 소장파열이 동반된 직장천통
김용정,지훈상,손승국,윤동섭,심희수,임대진,권민수 대한외상학회 1997 大韓外傷學會誌 Vol.10 No.2
Rectal impalement is even more unusual form of rectal injury. The typical mechanism of injury is a jump or a fall onto an impaling object, such as a fence or rake. This type of injury may range from simple rectal perforation with minimal soft tissue injury to severe rectal impalement, characterized by transfixion by the impaling object with resultant extensive perineal trauma and multiple organ damage. Because rectal injuries in civilians are uncommon, there remain considerable differences of opinion ahout the need for their repair as well as the optimal type of colostomy, method of drainage, and role of irrigation. We report a case of rectal impalement with associated intrapeirtoneal, extraperitoneal bladder perofration and ileal perforation caused hy through and through mechanism. Operatively, the anterior rectal tear was closed primarily transanally with interrupted two layer vicryl sutures. The diverting colostomy and presacral drainage were not performed. The defects of bladder were closed with running chromic sutures. A suprapubic tube was placed. Postoperatively, the patient did well and discharged on postoperative day 14. We believe this to he the first reported case of rectal impalement causing intraperitoneal, extraperitoneal bladder perforation and ileal perforation.
김석주,김용정,지훈상,임대진,이두연 대한외상학회 1997 大韓外傷學會誌 Vol.10 No.2
Blunt diaphragm rupture in and of itself is seldom acutely fatal. But it can he associated with severe life threatening abdominal or thoracic injuries. Late presentation of diaphragm rupture, particulary in the strangulation phase, is associated with greatly increased mortality directly attrihutable to the diaphragm rupture. We reviewed 37 patients at Yongdong Severance hospital from Jan. 1992 to Dec. 1996 in an attempt to; 1) evaluate the dit'ferences hetween the outcome of the cases with early diagnosis and delayed iliagnosis; and 2) identify factors contributing to diagnostic delay. Fourteen of 37(37.8%) blunt diaphragm rupture were missed on initial evaluation. As for the cause of injury. Driver accident had significantly grcater proportion of delayed diagnosis(71.4%) than early diagnosis(47.8%). Right diaphragm rupture was more frequently found in delayed diagnosis(28.6%) than early diagnosis(8.7%), hut there was no tatistical significance. Coincidental intraahdominal injuries had significantly greater proportion of early diagnosis(65.2%) than delayed cliagnosis (7,2%)(p=0.005). In herniation into the thoracic cavity. Delayed diagnosis(7I.4%) was more common than early diagnosis(39.1%). Shock (p=0.005) and transfused pocked red cell(p=0.001) were significantly greater in early diagnosis than delayed diagnosis. Injury severity score and Glasgov, coma scale, duration of lCU. Hospital day and duration of ventilator showed no difference betwecn the two groups. In delayed diagnosis, only four of 14(28.6% ) were admitted to department of surgery or thoracic surgery. All patients with early diagnosis were admitted to the department of surgery or chest surgery. Five patients with early diagnosis died due to associated injuries. No patients died in case of delayed diagnosis. In conclusion. Blunt diaphragm rupture is difficult to diagnose and remains a. marker of severe combined injuries. In absence of indications for immediate operation I.e. associated intraabdominal injury, shock, and massive transfusion, patients with equivocal radiologic findings should be admitted to general or thoracic surgery and repeatedly examined to prevent delays in diagnosis.