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Titaniun Interlayer가 TiN 박막의 밀착특성에 미치는 영향
공성호,김홍유,신영식,김문일 ( S . H . Kong,H . W . Kim,Y . S . Shin,M . I . Kim ) 한국열처리공학회 1992 열처리공학회지 Vol.5 No.1
In order to improve adhesive force of TiN film, we sputtered titanium as interlayer before TiN deposition by Plasma Enhanced Chemical Vapour Deposition. We observed changes of hardness and adhsion at a various thickness of titanium interlayer and also examined analysis. At the critical thickness of the titanium interlayer(about 0.2㎛) , adhesive force of TiN films were promoted mostly. But over the critical thickness, a marked reduction of adhesive force was showed, because of the internal stress of titanium interlayer. From AES analysis, the adhesion improvement of TiN films was mainly caused by nitrogen diffusion into titanium interlayer during TiN deposition process which relieved stress concentration at TiN coating-substrate interface.
공성호,양한광 대한의사협회 2010 대한의사협회지 Vol.53 No.4
Since early gastric cancer (EGC) patients show an excellent surgical outcome and a longterm survival rate, the purpose and methods of postoperative follow-up need to be reconsidered. The recurrence rate after surgery is less than 2% in EGC. The mode of recurrence is diverse, of which hematogeous metastasis being most frequently encountered. Post-gastrectomy patients have a risk of nutritional deficiency and more chances to develop remnant gastric tumor or secondary tumor than normal population. Based on the pattern and developmental time span of recurrence, postoperative follow-up program for EGC should not be different from that for advanced gastric cancer. Most Korean doctors’post-operative follow-up with the patients range up to 5 years with an interval of 4 to 6 months. Gastroscopy, CT, and tumor markers are used for follow-up by more than 50% of doctors. Due to the increased rate of long-term survival,follow-up program should include assessment of functional aspect and nutritional well-being of the patients. Epidemiological studies for the long-term survivors and specialized strategies need to be developed for management of postgastrectomy cancer patients. Although early detection of recurrence is the primary goal of post-operative follow-up, postgastrectomy patients should be recognized as a risk group in terms of nutritional and medical problems on a life-long basis, and long-term management strategy should be developed.
공성호,이은방 해양환경안전학회 1999 해양환경안전학회지 Vol.5 No.1
In the decision of a collision avoidance action for navigators and intelligent ships, it is necessary to evaluate the degree of surrounding risks and to control them effectively. In this paper, we propose the new methodology for navigational risk evaluation and control at sea. In the methodology, navigation risk is evaluated in two dimensions using Even Risk Contour on the basis of the concept of contour line. In addition, the movement information of dangerous targets is assessed continuously and precisely with wide band data. The presented technique is useful for the safety navigation at the heavy traffic sea and will be applied for the ultra automatic ship.
공성호,최용준,유건희,임윤성 대한이비인후과학회 부산,울산,경남 지부회 2015 임상이비인후과 Vol.26 No.2
Dentigerous cyst is one of the most prevalent types of odontogenic cysts and is associated with the crown of an unerupted or developing tooth. Although mostly asymptomatic, some of untreated denigerous cysts may displace adjacent teeth and cause complications such as jaw fracture, maxillary sinusitis or oroantral fistula. We report a 69-year-old female with dentigerous cyst, who had extensive deep neck infection which resulted in a life-threatening airway obstruction.