수도권 근교농촌의 토지이용과 경관의 변화

이애란,고동완,김유일 성균관대학교 생명과학자원연구소 1996 生命資源科學硏究 Vol.2 No.2

The city's countryside is adjusting to change by urbanisation. As it, the recent phenomena in this area decline in rural landuse and damage of landscape which has local characteristics. But, no study think together landuse and landscape at present in this area. The aim of this study was to clarify causes and problems of change by investigating intersection of environments and causes, processes and results of landuse and landscape in city's countryside. The sites are 2 Up and 2 Myon belong to Yongin Gun closed by Seoul City. These site are rapidly changed and almost intermediate between city and rural at present. As methods, I exeminated not only various statistical data but also unstatistical data. This case study revealed the diversity of change in city's countryside. 1) The change of landuse is clarified by Local Main commercial district is Yongin Up, Development of Traffic and industry is Kihung Up, Bed-town closed by city is Suji Myon and Recreation development is Pogok Myon. Each landuse divided by landscape types as local diversity in several Ri. Also each case seperatied by its special shape from each Ri and have causes and problems. 2) From these results did I point out problems and make a proposal about national landuse plan and landscape management in city's countryside. It stressed the need of a long-ranged policy of development in countryside considering local characteristics and residential environments. This paper was the start of case study about landuse and landscape in city's countryside.

Unconventional Geometric Quantum Phase Gate for Trapped Ions Based on the Squeeze Operator

Ai-Dong Zhu,Shou ZHANG,엄정인,연규황 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.1

A scheme for generating a geometric phase gate (GPG) with the squeeze operator is proposed in a system of trapped ions by using two standing wave lasers illuminating two ions simultaneously. A geometric phase is acquired by using a vibration mode undergoing a cyclic squeezing process in the phase space. This scheme gives an alternative effective way for a GPG in trapped ions, and it is realizable with current experimental techniques.

A Statistical Analysis of Postoperative Deaths in the Hospital

Dong Ai An,Byung Ki Kim,Hack Ju Park,Hang Soo Sohn Korean Society of Critical Care Medicine 1997 Acute and Critical Care Vol.12 No.1

Introduction: Anesthesia deaths are rare, while deaths due to surgical or other risk factors are more frequent. The goal of this analysis is to evaluate risk factors associated with postoperative mortality. METHODS: We have analyzed 34,200 surgical patients between 1990 and 1996 through records of anesthesia. The following informations were recorded; age of patients, physical status, site of operation, time of death, primary cause of death. RESULTS: The results are as follows; 1) Of 34,200 surgical patients, 119 died in the hospital. 2) The postoperative mortality rose progressively with age and was highest above 70 years. 3) Within 48 hours, the mortality was 36.1% of total deaths, declined progressively thereafter. The patients who had head operations exceeded 45% of deaths during this period. Eight days after the operation the mortality rate was 34.2% of total deaths and the patients who had an elective operation of the abdomen were 60.8%. 4) 34.2% patients of the total deaths had brain damages. Of these, 79.5% showed physical status V and had an emergency head operation and 47.5% were 50~60 years of age. 17.5% and 13.2% of deaths were due to sepsis and respiratory insufficiency and 48.6% of these two categories were physical status II, III and had an elective operation and 55.5% were above 60 years. CONCLUSION: The postoperative mortality was highest in the patients who had an emergency head operation and primary cause of death was brain damage. The patients of above 60 years, had a physical status II, III, had an elective abdominal operation were succeptable to sepsis and respiratory insufficieny.

Research and Implementation of Support Vector Machine and Its Fast Algorithm

Dong Ai-mei 보안공학연구지원센터 2014 International Journal of Multimedia and Ubiquitous Vol.9 No.10

Early Detection of Pulmonary Edema by Pulse Oximeter during Cesarean Section: Case report

Dong Ai An Korean Society of Critical Care Medicine 1997 Acute and Critical Care Vol.12 No.2

This case showed that pulse oximeter was helpful for early detection of pulmonary edema during Cesarean section in a parturient woman with preoperative ritodrine treatment. Though arterial oxygen saturation ( Sp02 ) by pulse oximeter was low before the induction of anesthesia, the woman was anesthetized due to emergency situation. SpO2 was continuously low during the operation, so pulmonary edema was suspected. After the operaton, pulmonary edema was diagnosed on the chest x-ray. On the ECG, anteroseptal wall ischemia was detected. Supplementary O2 and diuretics therapy were performed. On the 3rd postoperative day, arterial blood gas analysis was within normal range. Four days after the operation, ECG was normalized and chest x-ray finding was much improved. 10 days later, chest x-ray finding was normalized.

Creating unconventional geometric phase gate using squeeze-like operator assisted by strong driving field

Ai-Dong, Zhu,Shou, Zhang,Kyu-Hwang, Yeon,Seong-Cho, Yu,Chung-In, Um Chinese Physical Society 2007 CHINESE PHYSICS -BEIJING- Vol.16 No.6

<P>Based on the idea that a squeezing process can be thought of as a total cumulative effect of a large number of tiny squeezing processes, we define a squeeze-like operator with a time-dependent squeeze parameter. Applying this operator to and combining with a system which includes a two-photon interaction between two atoms and an initial vacuum cavity field, and resorting to a resonant strong driving classical field, we obtain an unconventional geometric phase gate with a shorter gating time.</P>

Preparation of porous cordierite ceramic with acid-leached coal gangue

Wang Xu-Dong,Xu Hai-Yan,Zhang Feng-Jun,Li Dong-Cai,Wang Ai-Guo,Sun Dao-Sheng,오원춘 한국세라믹학회 2020 한국세라믹학회지 Vol.57 No.4

The eff ect of impurities in coal gangue on the sintering and properties (porosity and compressive strength) of porous cordierite ceramics has been investigated by adjusting the amount of impurities by controlling the acid–gangue ratio during acid leaching. The sintering behavior and microstructure of the porous ceramics have been characterized via X-ray diff ractometry and scanning electron microscopy. The eff ects of both the acid–gangue ratio and sintering temperature on the porosity and compressive strength have been also investigated. The results indicated that both porosity and compressive strength of the porous cordierite ceramics prepared using acid-leached coal gangue were evidently improved. The content of the impurities in coal gangue was adjusted via acid leaching by controlling the acid–gangue ratio. The appropriate content of impurities in coal gangue facilitated the sintering process and improved the porosity and compressive strength of the obtained porous cordierite ceramics.

Identification of a Lead small-molecule inhibitor of anthrax Lethal toxin by using fluorescence-based high-throughput screening

( Dong Wei ),( Zhao Yun Bu ),( Ai Lian Yu ),( Feng Li ) 생화학분자생물학회(구 한국생화학분자생물학회) 2011 BMB Reports Vol.44 No.12

Inhalational anthrax is caused by B. anthracis, a virulent spore- forming bacterium which secretes anthrax toxins consisting of protective antigen (PA), lethal factor (LF) and edema factor (EF). LF is a Zn-dependent metalloprotease and is the main determinant in the pathogenesis of anthrax. Here we report the identification of a lead small-molecule inhibitor of anthrax lethal factor by screening an available synthetic small-molecule inhibitor library using fluorescence-based high-throughput screening (HTS) approach. Seven small molecules were found to have inhibitory effect against LF activity, among which SM157 had the highest inhibitory activity. All theses small molecule inhibitors inhibited LF in a noncompetitive inhibition mode. SM157 and SM167 are from the same family, both having an identical group complex, which is predicted to insert into S1` pocket of LF. More potent small-molecule inhibitors could be developed by modifying SM157 based on this identical group complex. [BMB reports 2011; 44(12): 811-815]

Minimum 2-Year Experience with Magnetically Controlled Growing Rods for the Treatment of Early-Onset Scoliosis: A Systematic Review

Ai-Min Wu,Jason Pui Yin Cheung,Kenneth Man Chee Cheung,Jia-Liang Lin,Hai-Ming Jin,Dong Chen,Xiang-Yang Wang,Jie Zhao,Kenny Yat Hong Kwan 대한척추외과학회 2019 Asian Spine Journal Vol.13 No.4

Magnetically controlled growing rods have been used to treat early-onset scoliosis for the last 9 years; however, few studies have been published, with only short-term follow-up. The aim of the present study is to systematically review the outcomes of magnetically controlled growing rods in the treatment of early-onset scoliosis with a minimum of 2-year follow-up. Studies were included if patients with early-onset scoliosis (scoliosis diagnosed before 10 years of age) underwent implantation of magnetically controlled growing rods with a minimum of 2-year follow-up. The literature review and data extraction followed the established preferred reporting items for systematic review and meta-analysis guidelines. Data of distraction frequency, number of distractions, distracted length, Cobb angle, kyphosis, T1–T12 length, and T1–S1 length preoperatively, postoperatively, and at final follow-up were collected. Data regarding complications and unplanned reoperations were also extracted. The mean values of these parameters were calculated, or pooled meta-analysis was performed if available. Ten articles were included in this systematic review, with a total of 116 patients and a follow-up period between 23 and 61 months. The mean preoperative Cobb angle and kyphosis angle were 60.1° and 38.0°, respectively, and improved to 35.4° and 26.1° postoperatively. At final follow-up, the Cobb and kyphosis angles were maintained at 36.9° and 36.0°, respectively. The average preoperative T1–T12 and T1–S1 lengths were 180.6 mm and 293.6 mm, respectively, and increased to 198.3 mm and 320.3 mm postoperatively. T1–T12 and T1–S1 lengths were 212.3 mm and 339.3 mm at final follow-up, respectively. The overall rate of patients with complications was 48% (95% confidence interval [CI], 0.38–0.58) and unplanned reoperation 44% (95% CI, 0.33–0.55) after sensitivity analysis. The current evidence from different countries with a minimum of a 2-year follow-up suggests that magnetically controlled growing rods are an effective technique to treat pediatric scoliosis and promote spine growth. However, nearly half of patients still developed complications or required unplanned reoperations.

Robust H-infinity Estimation for Linear Time-Delay Systems: An Improved LMI Approach

Ai-Guo Wu,Jin Dong,Guang-Ren Duan 제어·로봇·시스템학회 2009 International Journal of Control, Automation, and Vol.7 No.4

The problem of robust H∞ estimation for the polytopic uncertain linear system with state delay is considered. Firstly, by introducing two auxiliary matrices a new LMI representation of H∞ performance is presented for the linear systems with a single time-varying state delay. The proposed criterion exhibits a kind of separation between the system matrices and the positive definite Lyapunov matrices. So the vertex-dependent Lyapunov functions can be adopted, and thus a less conservative re-sult is expected to be obtained.