http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이일환,남인철,정장원,김동현 대한이비인후과학회 2016 대한이비인후과학회지 두경부외과학 Vol.59 No.1
Cholesterol granuloma is rare and has occasionally been reported in uncommon sites of the head and neck, such as in the nasal sinus (frontal, ethmoid, sphenoid, or maxillary sinus), endolymphatic sac, and pterygoid process of the sphenoid sinus. The pathogenesis of thisnrare disease is not clear. We experienced one patient with cholesterol granuloma located in the nasal septum, which was managed successfully by endoscopic assisted excision. Korean J Otorhinolaryngol-Head Neck Surg 2016;59(1):49-52
이일환,노승훈,한대성,김영조,길사근,박인규 한국반도체디스플레이기술학회 2019 반도체디스플레이기술학회지 Vol.18 No.1
Pipes are widely used in various industries such as automobile, anti-vibration devices, factories and ship building. Chamfering is one of the most critical processes in pipe manufacturing which removes burrs of the pipes for better surface quality. In most cases, the defects of the chamfered surface are originated from the structural vibrations of the chamfering machine. In this study, the dynamic characteristics of a chamfering machine have been analyzed though the experiment and the computer simulation. And the effects of the design parameters affecting the stability of the machine have been investigated to stabilize the machine structure and further to reduce structural vibrations. The result shows that design alterations to stabilize the machine can suppress the defects of the machined surface as well as the vibrations during chamfering.
태양전지 웨이퍼용 Wire Saw안정화를 위한 지지구조 개선
이일환,노승훈,김동욱,박인규,길사근,김영조 한국반도체디스플레이기술학회 2018 반도체디스플레이기술학회지 Vol.17 No.3
In recent years, the solar cell market has steadily grown with the demand for new energies. And wire sawing is one of the most critical processes in manufacturing solar cell wafer which is supposed to affect the breakage of wafers most during the process and afterwards. Generally, the defects of the wafers are generated from the structural vibrations of the machine. In the sawing process, the vibrations cause unnecessary normal stress on the cut surface of wafers, and eventually create the surface damage or leave the residual stress. In this study, the dynamic properties of a wire saw have been analyzed through the frequency response test and the computer simulation. And the effects of the design alterations have been investigated to stabilize the machine structure and further to reduce the vibrations. The result shows that relatively simple design alterations of supporting structure without any change of major parts of the machine can suppress the vibrations of the machine effectively.
일개 도시에서 발생한 병원 밖 성인 심정지 환자들에 대한 분석 및 시계열 변화에 대한 고찰
이일환,안성준,김용환,이준호,이동우,박종윤,황성연,이경렬 대한응급의학회 2023 대한응급의학회지 Vol.34 No.2
Objective: This study aimed to determine the incidence, characteristics, and outcomes of out-of-hospital cardiac arrests (OHCA) and to investigate the trends for the same in Changwon city, South Korea between 2012 and 2018. Methods: We analyzed a list of adult cardiac arrest cases occurring between 2012 and 2018 from the OHCA surveillance registry and the Changwon Fire Department’s emergency medical services database. The trends in the incidence and resuscitation-related characteristics were assessed using nonparametric tests for trends across ordered groups. The predictors of the primary outcome were investigated using multivariable logistic regression. The primary outcome was a good neurological outcome at hospital discharge. Results: A total of 2,951 OHCAs were attended by the emergency medical services and of these, 2,834 were included in this study. Overall, the proportion of patients discharged with a good neurologic outcome was 4.7% (133/2,834). Both OHCA survival and good neurologic outcomes improved significantly over time, from 4.9% and 2.1%, respectively, in 2012 to 10.3% and 7.4% in 2018 (P<0.001). The Utstein comparator (bystander-witnessed arrests presenting with initial shockable rhythm) increased over the study period (P-for-trend<0.001). Age, response time, scene time, in-hospital cardiopulmonary resuscitation (CPR) time, witness presence, cardiac origin, and shockable rhythm were associated with good neurologic outcomes. Conclusion: With the gradual increase in the proportion of patients with witnessed cardiac arrests, bystander CPR, and initial shockable rhythm, the rate of survival and a good neurologic outcome at discharge also increased annually.