• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 춘계학술대회 논문집
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• pp.875-876
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• 2012

• Journal of the Optical Society of Korea
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• 제14권1호
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• pp.14-21
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• 2010

Fiber ring laser based intra-cavity absorption spectroscopic sensor has great potential for high sensitivity gas detection. Using the rate equations and propagation equations, we investigated theoretically factors that affect the sensitivity of such fiber ring laser sensors and determined the optimal design parameters and conditions for significant enhancement of the system sensitivity. Experiments have been conducted to determine the sensitivity enhancement performance. The results showed a factor of 25 ~ 30 in sensitivity enhancement in the experimental system, agreeing well with the theoretical expectations. Experiments on acetylene detection have also been carried out and the results showed that the ring cavity significantly increases the signal absorption and that high sensitivity can be obtained for gas detection.

• 대한물리의학회지
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• 제3권4호
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• pp.247-254
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• 2008

Purpose : The purpose of this study was to analyze some factors that can cause incidence of the muscle and skeletal system trouble, by which Dental Hygiene Students examine the pain and the inconvenient feeling according to kinds in manual implements and the usability in the level of manipulating and maintaining the manual implement, in the actual training of the intra oral cavity along with mannequin given the scaling practice. Methods : Targeting 18 female juniors for the department of dental hygiene, who had directly practiced oral prophylaxis for 2 years, the questionnaire research was carried out right after the mutual practice in the intra oral cavity along with mannequin. Results : It was indicated that there is no big difficulty both in intra oral cavity and mannequin in terms of manipulating implement with a method of maintaining the rightly hand fixing or of grasping the trans formative pencil and of controlling force given manipulating the implement. How to grasp a trans formative pencil was indicated to be more difficult in the intra-oral manipulation(p<.05). Pain and inconvenient-feeling level, which occur in muscle and skeletal system during practicing the scaling in mannequin, were indicated to be in order of shoulder, wrist, neck, waist, elbow, and headache. Conclusion : There was no big difference in the pain and the inconvenient feeling in muscle and skeletal system according to mannequin and intra-oral environment given manipulating tile manual implement. However, there was difference in manipulating the implement with a method of grasping transformative pencil. The pain and inconvenient feeling in muscle and skeletal system were the highest both in shoulder and wrist.

• 의료법학
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• 제18권1호
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• pp.265-295
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• 2017

최근 들어서면서 유방에 대한 수술이 종류가 확대술 축소술 재건술로 대별되고 다양해지면서 이에 따른 원치 않은 수술성과에 대한 분쟁이 증가상태에 있으며, 이로 인한 배보상 문제가 최종적으로 대두되면서, '원치 않은 수술성과'를 '수술 후의 문제점' 보다는 "장애'로 보는 관점이 증가되면서, 신체장애 평가에서 유방의 흉부 장기 해당 여부에 따른 노동력상실률이 직접적으로 거론되기에 이에 대한 견해를 발표하고자 한다. 이를 위해, 법령에서 나오는 용어의 사전적 정의 및 의학적 제반 사항을 살펴보았다. 흉부 장기에 유방 포함 여부의 혼란은 용어 선정 후 그 해석이 시대 변화와 맞물려 유발된 것으로 생각된다. 법령에서의 자구 해석을 살펴보면, 유방은 흉부 장기에 해당되지 못함으로 규정된 것으로 사료되며, 수유장애는 낮은 출산율과 실제로 모유수유하는 경우가 현저하게 줄어들고 있는 상황에서 다수의 의견이라고 주장 강조함이 약화되고 있으며, 모유수유를 노동으로 볼 수 있는 유모로서의 직업도 현재 존재하는지 조차 모르는 실정이다. 이런 이유로, 유방을 흉복부 장기 해당 여부에 대한 논란을 잠재우기 위해서, 포함시키려면, (1) 법령집의 용어를 교체하거나(흉복부 장기에서 (ㄱ) 흉복부를 '흉복부 및 흉복강'으로 그리고 (ㄴ) 장기를 '장기 및 기관'으로), (2) 여러 법령에서 용어 변경은 어렵기 때문에, "산업재해보상보험법 시행규칙 [별표 제5호] 신체부위별 장해등급 판정에 관한 세부기준(제48조 관련)"에 유방을 예외적으로 포함시키면 될 것이라고 생각해 본다. 그러나 피부부속기관인 유방을 흉복부 기관 혹은 예외적으로 포함시키면, 당연히 다른 피부부속기관도 포함시켜야 하는 모순관계가 도출되는 문제가 있다고 사료된다. 반면 완전히 배제시키려면, (1) '흉복부'를 '흉복강'으로 하거나, (2) "유방은 제외된다"라는 단서 조항만 삽입하면 될 것이라고 생각해 본다. 법 앞에 만인이 평등하다 하지만 만인 앞에 법이 평등하기 위해서는, 즉 새로운 해석과 판결을 위해서는 사회적인 합의가 있어야 할 것으로 생각된다.

• 전기전자학회논문지
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• 제18권1호
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• pp.19-24
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• 2014

We report stable, wideband, flat-topped, 10 GHz optical frequency comb generation from a semiconductor-based mode-locked ring laser with an intra-cavity high finesse Fabry-Perot etalon. We demonstrate a stable 10 GHz comb with greater than 200 lines within a spectral power variation below 1 dB, which is the largest value obtained from a similar mode-locked laser in our knowledge. Greater than 20 dB of the spectral peak to deep ratio at 0.02 nm resolution, ~92 femtosecond timing jitter over 1 kHz to 1 MHz range, and non-averaged time traces of pulses confirm very stable optical frequency comb lines.

• Journal of Chest Surgery
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• 제33권1호
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• pp.73-78
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• 2000

Background: this study was designed to estimate whether specific risk factors could increase the postoperative complication rate of pneumonectomy for chronic complicated inf-lammatory lung disease. Material and Method: Eighty-five patients underwent pneumon-ectomy for chronic complicated inflammatory lung disease(tuberculosis, 67 ; bronchiecasis 11; aspergio- losis, 4; others, 3) between January 1991 and August 1998. We performed a univariated statistical analysis to identify preoperative and intraoperative risk factors associated with postoperative complications, Result: There was no operative mortality. There were a total of 18 postoperative complications(22.2%) Bronchopleural fistula(BPF) and empyema occurred in 5(5.9%) and 2(2.4%) respectively. General complication rate was significantly higher in patients with right-sided pneumonectomy(p=.029) extrapleural pneu-monectomy(p=.009) and intraoperative pleural spillage due to cavity or lesion perforation (p=.004). The prevalence of BPF and empyema was higher in patients with right sided pneumonectomy(p=.007) extrapleural pneumonectomy(p=.015) and intraoperative pl- eural spillage due to cavity or lesion perforation(p=.003) which is as the same results as gen-eral complication rate. Conclusion: The postoperative complication rate of pneumone-ctomy for chronic complicated lung disease is accptably low. But it is increase in patients with right sided pneumonectomy extrapleural pneumonectomy and intraoperative pleural spillage due to cavity or lesion perforation. therefore more careful and meticulous intra-operatve management are needed in right sided extrapleural pneumonectomy without intra- pleural spillage.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제4권2호
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• pp.224-227
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• 2001

Esophageal duplication cysts are quite uncommon benign lesions of the esophagus that have previously been described as occurring only in the thoracic cavity. We experienced a rare case of completely intra-abdominal esophageal duplication cyst in a 10-year-old boy who has suffered from epigastric abdominal pain. Surgical excision is recommended at the time of cyst discovery whether symptoms present or not.

• Restorative Dentistry and Endodontics
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• 제29권3호
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• pp.239-248
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• 2004

The purpose of this study was to investigate the influence of NK1 receptor antagonists on the pulpal blood flow (PBF) when applied iontophoretically through the dentinal cavity of the teeth in order to understand whether iontophoretically applied NK1 receptor antagonists can control the pulpal inflammation. Eleven cats were anesthetized with alpha-chloralose and urethane, and substance P (SP) was administered to the dental pulp through the catheterized lingual artery in doses that caused PBF change without the influence of systemic blood pressure. NK1 receptor antagonists were applied iontophoretically to the prepared dentinal cavity of ipsilateral canine teeth of the drug administration, and PBF was monitored. Data were analyzed statistically with paired t-test. PBF increase after iontophoretic application of the NK1 receptor antagonists followed by the intra-arterial administration of SP was significantly less than PBF increase after iontophoretic application of the 0.9% saline followed by the intra-arterial administration of SP as a control (p < 0.05). Iontophoretic application of the NK1 receptor antagonists (0.2~3.4 mM) following the intra-arterial administration of SP resulted in less increase of PBF than the iontophoretic application of the 0.9% saline following the intra-arterial administration of SP as a control (p < 0.05). Therefore. the results of the present study provide evidences that the iontophoretic application is an effective method to deliver drugs to the dental pulp. and that iontophoretically applied NK1 receptor antagonists block SP-induced vasodilation effectively. The above results show the possibility that the iontophoretical application of NK1 receptor antagonists can control the neurogenic inflammation in the dental pulp.

• 대한방사선치료학회지
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• 제7권1호
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• pp.92-96
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• 1995

All patients who will Undergo irraidiation of the oral cavity cancer will need dental before and during Radiotherapy. The extent of the region and the presence of numerous critical normal tissues(mucosa, gingiva, teeth and the alveolar ridge, alveolar bony structure, etc) in the oral cavity area, injury to which could result in serious functional impairment. Therefore I evaluate the Usefulness of custom-made intraoral shielding device before and during Radiotherapy in oral cavity cancer. Materials and Methods(1) : Manufacture process of Custom-made intraoral shielding device Containing Cerroband. A. Acquisition of impression B. Matrix Constitution C. Separation by Separator D. Sprincle on method E. Trimming F. Spacing G. Fill with Cerroband Materials and Methods (2) A. Preannealing B. TLD Set up C. Annealing D. TLD Reading = Results = Therefore dosimetric characteristics in oral cavity by TLD Compared to isodose curve dose distribution Ipsilateral oral mucosa, Contralateral oral mucosa, alveolar ridge, tongue, dose was reduced by intraoral shielding device containning Cerroband technique Compard to isodose plan = Conclusions = The custom-made intra-oral shielding device containing Cerroband was useful in reducing the Contralateral oral mucosa dose and Volume irradiated.

• Journal of the Optical Society of Korea
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• 제5권3호
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• pp.83-89
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• 2001

Room temperature quasi-continuous operation is achieved near 1556 nm with threshold current as low as 2.2 mA from a 5.6-${\mu}{\textrm}{m}$ oxide-aperture vertical-cavity surface-emitting laser. Wafer fusion techniques are employed to combine the GaAs/AlGaAs mirror and the InP-based InGaAs/InGaAsP active layer. In this structure, an $Al_x/O_y$/GaAs distributed bragg reflector and intra-cavity contacts are used to reduce free carrier absorption.