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성대의 화농성 육아종 환자에서 광봉을 이용한 기관 삽관 중 발생한 우발적인 육아종의 제거 - 증례 보고 -
김한수 대한마취통증의학회 2007 Anesthesia and pain medicine Vol.2 No.3
We experienced a case of incidental removal of granuloma of vocal cord after blind endotracheal intubation with lightwand. The patient was a 43-years-old female suffering from hoarseness for 2 months and diagnosed as vocal cord pyogenic granuloma developed after primary closure of thyroid cartilage laceration. She had a limited neck extension suggesting difficult intubation, so endotracheal intubation with lightwand was planned to secure airway. After endotracheal intubation using lightwand, the lesion of vocal cord could not be seen in the microscopic exam. We discovered and immediately removed the granuloma on the carina level using rigid bronchoscope.
Study on the Forest Watershed Classification Method for Forest Watershed Management
김한수,이양주 한국환경생태학회 2015 한국환경생태학회지 Vol.29 No.2
The master plan of forest land management proposes forest watershed management that considers regional characteristics in order to overcome the problem of uniform forest land management. In order to manage the forest watersheds in Gyeonggi-do, this study classified 1,823 forest watersheds in Gyeonggi-do and attempted to understand their characteristics. It conducted a factor analysis and cluster analysis from the perspective of conservation value and development pressure using forest land indicators. In terms of conservation value, three factors were drawn: the topography factor, vegetation factor and public service factor, while in terms of development pressure, three factors were drawn: the easiness of development factor, economic benefits factor and development activity factor. Using these factors, forest watersheds were divided into three clusters in terms of conservation value while they were divided into three clusters in terms of development pressure. Using the results of the cluster analysis from a conservation-development perspective, the forest watersheds were classified into nine different types, and the characteristics were identified by each type. It is judged that the factors and clusters drawn as a result of the research accurately reflect the present conditions of Gyeonggi-do, and the nine types of forest watersheds have clear characteristics according to each type, which are judged to be utilized in forest management in the future.
외래치료실에서의 근위축성 측삭경화증 환자(ALS)의 전신마취 하치과 치료시 마취관리
김한수,이숙영,최은혜,김승오,Kim, Han-Su,Lee, Suk-Yung,Choi, Eun-Hye,Kim, Seung-Oh 대한치과마취과학회 2013 Journal of Dental Anesthesia and Pain Medicine Vol.13 No.4
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease caused by the degeneration of upper and lower motor neurons. The disorder causes muscle weakness and atrophy in airway muscles including pharyngeal, laryngeal and other respiratory muscles. The response to muscle realxant is also altered in patients with ALS. Because of the inherent muscle weakness and associated respiratory insufficiency, particular attentions are needed in anesthetic management of ALS patients. We used proper doses of inhalation anesthetics and opioids under EEG-entropy (electroencephalography-entropy)-monitoring without the use of muscle realxants in the anesthetic management of a patient with ALS. The patient early recovered and was discharged on the same day without any respiratory complications.
김한수 한국환경생태학회 2015 한국환경생태학회지 Vol.29 No.2
This study is intended to evaluate the value of functional aspect from the viewpoint of habitat. The indicators that are used in biotope evaluations are various, but most of them use the criteria to evaluate the naturality. This evaluation method cannot appropriately reflect the functional characteristics coming from relation to the surrounding biotope. In this study, the connectivity, cohesion and diversity between individual biotope are quantitatively measured by a landscape index. It is hard to draw the functional value of individual biotopes because the landscape index related to connectivity, cohesion and diversity comes from a landscape having a number of biotopes. The concept of contribution was used to overcome this limitation. The concept of contribution is to quantify how much each individual biotope contributes to the connectivity, cohesion, and diversity in a certain range of landscape by deriving the amount of change in the landscape index according to the presence or absence of each individual biotope. In order to understand the characteristics of evaluation results in functional aspect, this research has done a comparative analysis of the previous research findings in the same target area. According to the result of the research, individual biotopes such as artificial forests, fragmented natural forests, and small planting sites were highly rated.
김한수,반수홍 한국환경생태학회 2015 한국환경생태학회지 Vol.29 No.2
This study analyzed the growth characteristics of multi-layer planted trees through their growth analysis and attempted to present a management strategy. The subject of research is the Citizen's Forest Area of Seoul Forest Park located in Seoul City. Field surveys were conducted three times over eight years from 2005 when the Seoul Forest Park was created through 2013. Labels were attached to all trees in the target area, and their species, height and DBH were investigated. To identify the growth differences by trees in each area, a detailed tree location map was drawn up for use in the analysis. To check soil health, soil organic matter, soil pH and soil microbial activities were analyzed. It turned out that the growth of the multi-layer planted trees in the target area of research was higher than that of the trees in existing urban parks, and that it was similar to that of trees in natural forests. Through a field survey in the area with a remarkably low growth, high-density planting problem, soil was found to have excess-moisture and there was the problem of Pueraria lobata covering. As a result of the analysis of the soil, it was found that its organic content in the soil was lower; soil pH was higher; and microbial activities in the soil were lower when compared to that of natural forests.
Characteristics of Silicon Surface Barrier Radiation Detectors for Alpha Particle Detection
김한수,박세환,하장호,조승연,김용균 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.6
Silicon surface barrier (SSB) radiation detectors with various electrode structures were designed and fabricated to extract an optimal structure for detecting charged particles with high sensitivity. There are two main considerations in this study. One is a guard electrode structure to minimize reverse-bias leakage currents and the other is the size of the active area to achieve a relatively high-energy resolution for its application. Two different semiconductor fabrication processes were incorporated. The contribution of an etching process, which is one of the semiconductor fabrication processes affecting a detector's performance, was also investigated. Reverse-bias leakage currents of the guard-configured SSB radiation detectors can be minimized by about ten times compared with those of the plain planar-type SSB radiation detectors in both an etching case and a non-etching case. Improved energy resolutions for alpha particles from ²³8Pu were also observed in both cases. The diameters of the active areas of the plain planar-type SSB radiation detectors were varied from 8 mm to 1 mm to determine the optimal active area by comparing the energy resolutions. From this study, the characteristics of SSB radiation detectors due to an incorporation of a guard electrode, including the size of an active area, were investigated for their proper application, such as high-energy charged-particle detection in an accelerator and radon detection in air. Two different fabrication processes were also addressed.