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- 저자 : Gahee LEE (검색결과 58 건)
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Lee, Dong Bok,Kim, Kwang-Joong,Yoo, Gahee,Park, Sung,Lee, Jae Chun American Scientific Publishers 2015 Journal of Nanoscience and Nanotechnology Vol.15 No.7
<P>The effect of adding Al2O3 nano-filler (5 and 10 vol%) to two different alkali/alkaline-earth borosilicate glass sealants, particularly on the viscosity and electrical characteristics of the glass composite sealants, was investigated to improve the cyclic sealing performance. The effects of the filler and base glass composition on the viscosities, electrical conductivities, and phase transformations of the sealants were investigated. The glass viscosity was decreased by replacing 20 mol% SrO with alkali and zirconium oxide in a base alkaline-earth glass. Alumina filler increased the high-temperature electrical conductivities, as well as the viscosities, of the heat-treated glass composite sealants. The replacement of 20 mol% SrO with alkali and zirconium oxide in the base alkaline-earth glass decreased the electrical conductivity of the heat-treated glass containing Al2O3 nano-filler.</P>
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Gahee Son,Sohee Oh,Jaehee Lee,Saeromi Jun,Jongbin Kim,Jongsoo Kim,Joonhaeng Lee,Miran Han,Jisun Shin The Korean Dental Society of Anesthsiology 2024 Journal of Dental Anesthesia and Pain Medicine Vol.24 No.3
Background: Patients with autism spectrum disorder (ASD) present challenges in dental treatment cooperation owing to deficits in communication skills and social interaction. Behavioral guidance, sedation, and general anesthesia may be employed to ensure the quality of dental care for individuals with ASD. This study aimed to examine the trends in dental treatment for patients with ASD who visited the Department of Pediatric Dentistry at Dankook University Jukjeon Dental Hospital, an oral health center for the disabled in the Gyeonggi region, over the past 10 years. Methods: This study utilized the order communication system to gather data on sex, age, cooperation level, number of quadrants treated, and administration of sedation or general anesthesia for patients with ASD who visited the Department of Pediatric Dentistry at Dankook University Jukjeon Dental Hospital between January 2013 and December 2022. Results: The total number of patients with ASD increased annually, possibly due to an increase in ASD prevalence and the hospital's designation as a center for disabled oral health. General anesthesia was predominant before 2017, with a shift towards N<sub>2</sub>O-O<sub>2</sub> sedation. The most common age group for sedation or general anesthesia was 6-9 years, with a higher prevalence in males than in females. Notably, N<sub>2</sub>O-O<sub>2</sub> and midazolam sedation resulted in better cooperation and fewer treated teeth than general anesthesia. Conclusion: This study highlights the evolving trends in dental treatment for individuals with ASD, indicating a shift towards outpatient methods, particularly N<sub>2</sub>O-O<sub>2</sub> sedation. The sex distribution aligns with national statistics, emphasizing a higher prevalence of ASD in males than in females. These findings underscore the need for further research to establish evidence-based guidelines for optimal dental care strategies tailored to the unique needs of individuals with ASD.
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Characterization of Ceftriaxone-Resistant Haemophilus influenzae Among Korean Children
Lee Sanghoon,Kim Gahee,Kim Jung Hwa,Kim Mi-Na,Lee Jina 대한의학회 2024 Journal of Korean medical science Vol.39 No.15
Background: Haemophilus influenzae is a frequently encountered pathogen responsible for respiratory tract infections in children. Following the detection of ceftriaxone-resistant H. influenzae at our institution, we aimed to investigate the resistance mechanisms of ceftriaxone in H. influenzae, with a particular focus on alterations in penicillin-binding protein 3 (PBP3) and β-lactamase production. Methods: Among H. influenzae isolates collected at Asan Medical Center Children’s Hospital from March 2014 to April 2019, ceftriaxone-resistant strains by the disk-diffusion test were included. Ceftriaxone minimum inhibitory concentrations (MICs) were determined using the E-test according to the European Committee on Antimicrobial Susceptibility Testing (EUCAST) guidelines. The presence of β-lactamase was assessed through cefinase test and TEM-1/ROB-1 polymerase chain reaction (PCR). PBP3 alterations were explored via ftsI gene sequencing. Results: Out of the 68 collected strains, 21 exhibited resistance to ceftriaxone in disk diffusion tests. Two strains were excluded due to failed subculture. Among 19 ceftriaxoneresistant H. influenzae isolates, eighteen were non-typeable H. influenzae, and twelve were positive for TEM-1 PCR. Isolates were classified into groups II (harboring only N526K, n = 3), III (N526K+S385T, n = 2), III+ (S385T+L389F+N526K, n = 11), and III-like+ (S385T+L389F+R517H, n = 3) according to the PBP3 alteration pattern. With a median ceftriaxone MIC of 0.190 mg/L (range, 0.008–0.750), the median ceftriaxone MIC was the highest in group III-like+ (0.250 mg/L), followed by groups III+ (0.190 mg/L), III (0.158 mg/L), and II (0.012 mg/L). All three strains belonging to group II, which did not harbor the S385T substitution, had ceftriaxone MICs of ≤ 0.125 mg/L. Conclusion: The emergence of ceftriaxone-resistant H. influenzae with ceftriaxone MIC values of up to 0.75 mg/L was observed even in children in South Korea, with most associated with S385T and L389F substitutions. The N526K mutation alone does not significantly impact ceftriaxone resistance. Further large-scale studies are essential to investigate changes in antibiotic resistance patterns and factors influencing antibiotic resistance in H. influenzae isolated from pediatric patients in Korea.
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( Gahee Kim ),( Junbum Lee ),( Sangho Lee ),( Jeong-hyun Choi ) 경희대학교 경희의료원 2022 慶熙醫學 Vol.37 No.1
Sugammadex induced anaphylactic reaction is very urgent event as it is usually not anticipated in the advance. The incidence of anaphylactic reaction due to sugammadex is rare, 0.0039% to 0.3%, but it can occur even if there is no previous allergy history, and it often occurs after extubation, so immediate diagnosis and treatment are essential. This report presents a 70-year-old woman who had no previous exposure to sugammadex and allergy history and scheduled to undergo posterior lumbar interbody fusion L4-S1 to treat lumbosacral spondylolisthesis. Anesthesia via propofol, inhalational gas, remifentanil and rocuronium was used. The operation under general anesthesia went well without any problems The patient was administered sugammadex to reversal neuromuscular block, and delivered to post-anesthesia care unit (PACU). After arrival at PACU, she had anaphylactic reaction and received appropriate treatment including epinephrine. She discharged without any complications 6 weeks days after the surgery.
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Lee Yoo Jung,Min Jinsoo,Myong Jun-Pyo,Lee Yun-Hee,Park Young-Joon,Kim Yujin,Kim Gahee,Park Gyuri,Lee Sung-Soon,Park Jae Seuk,Kim Ju Sang,Kim Hyung Woo 대한의학회 2024 Journal of Korean medical science Vol.39 No.28
Background: With a rapid decrease in tuberculosis (TB) incidence, the significance of latent tuberculosis infection (LTBI) has been underscored in South Korea. Although South Korea does not have a high proportion of immigrants compared to other countries, there is a growing argument that it should actively embrace immigrants as a solution to address issues of low birth rates and population aging. This study aimed to assess TB incidence among immigrants who participated a pilot LTBI screening program in South Korea. Methods: Records of immigrants participated in a pilot LTBI screening program in South Korea between 2018 and 2019 were linked with Korean National TB Surveillance System to determine TB development. Participants underwent interferon-gamma release assay (IGRA) and chest X-rays. Standardized incidence ratios (SIRs) stratified by age, country of origin’s TB burden was calculated with a reference group of general South Korean population. Results: Of a total of 9,517 participants, 14 TB cases were identified. Participants with positive IGRA results who did not initiate LTBI treatment showed TB incidence of 312.5 per 100,000 person-years, whereas those with negative results showed TB incidence of 34.4 per 100,000 person-years, resulting in an incidence rate ratio of 9.08 (95% confidence interval [CI], 2.50–32.99). SIR of TB among total participants including those with negative IGRA results was 2.60 (95% CI, 1.54–4.38; P < 0.001), whereas SIR among those with positive IGRA results was 5.86 (95% CI, 3.15–10.89; P < 0.001). In the calculation of SIR among participants with positive IGRA results, those aged under 35 from high TB-burden countries or intermediate TBburden countries showed a high SIR (18.08; 95% CI, 2.55–128.37; P = 0.004), and 11.30 (95% CI, 2.82–45.16; P < 0.001), respectively). Contrary to previous reports that suggest the majority of elderly population with a positive IGRA result were due to remote infection and had a lower TB risk compared to younger ages, SIR among those aged 65 or over from intermediate TB-burden countries was 6.15 (95% CI, 0.87–43.69; P = 0.069), which was comparable to that in younger participants aged between 35 and 49 (SIR, 4.87; 95% CI, 1.22–19.49; P = 0.025) or those aged between 50 and 64 (SIR, 4.62; 95% CI, 1.73–12.31; P = 0.002). Conclusion: Young immigrants with positive IGRA results from countries with high or intermediate TB burden showed a relatively high TB risk compared to a general South Korea population. In addition, unexpected high TB risk was observed among elderly immigrants with positive IGRA results. In establishing future policies for LTBI in immigrants in South Korea, screenings should primarily focus on younger age group (who aged under 35). Additionally, further research is needed on the high TB risk observed in elderly immigrants.
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고가희(Gahee Ko),박용민(Yongmin Park),서유진(YouJin Seo),이세환(SeHwan Lee),최훈영(HoonYoung Choi),이주환(Ju-Hwan Lee) 한국HCI학회 2019 한국HCI학회 학술대회 Vol.2019 No.2
자율주행은 미래 모빌리티 산업의 변화를 이끌어갈 핵심요소로 주목 받고 있다. 대중교통이나 공유차량이 아닌 개인소유 차량에서 운전자의 개입이 필요 없는 완전한 자율주행이 가능해지기 까지는 상당한 기간이 소요될 것으로 보인다. 기존 차량의 운전자 지원정보는 대부분 수동주행에 맞춰 운전자에게 제공된다. 수동주행에서 자율주행으로 통제권이 전환되었을 때 사용자 입장에서 차량 내 지원정보의 우선순위가 변한다면 이에 맞게 정보디스플레이의 형태나 배치 또한 달라져야 한다. 본 연구에서는 수동주행과 자율주행 사이에 사용자가 느끼는 지원정보 우선순위의 차이를 파악하고, 그에 맞는 지원정보 디스플레이 방식을 논의하였다. 평가실험 참가자는 기존 차량 운행 경험을 바탕으로 수동주행 차량들이 제공하고 있는 주행 지원정보들의 우선순위를 평가하고, 자율주행 상황을 가정하여 동일한 정보들의 우선순위를 평가하였다. 그 결과로 분석된 우선순위의 변화를 반영하여 차량 지원정보 디스플레이 방식을 논의하였다.
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온도변화와 촉매조건에 따른 아역청탄과 아역청탄으로부터 추출한 초청정탄을 이용한 가스화 반응성 비교
이가희(Gahee Lee),윤상필(SangPhil Yoon),전영신(YongShin Jeon),김형택(Hyung-Taek Kim) 한국에너지기후변화학회 2011 에너지기후변화학회지 Vol.6 No.2
Coal is spotlighted as a top priority energy resource which will replace oil. Coal gasification can reduce amount of carbon dioxide(CO<SUB>2</SUB>), sulfur oxides(SOx) and nitrogen oxides(NOx). Also, it produces mono dioxide(CO) and Hydrogen(H<SUB>2</SUB>). However, typical-type coal gasification technology is required huge amount of energy at high temperature over 1000℃. Therefore, catalyst(K<SUB>2</SUB>CO<SUB>3</SUB>) is added to decrease operation temperature and reduce amount of energy. In this experiment, Roto ultra clean coal(UCC) and Roto original coal(OC) are used. And coal char is produced for this experiment. The experiment is progressed with 1g of coal char with potassium carbonate(K<SUB>2</SUB>CO<SUB>3</SUB>) under flowed 500ml/m of steam(H<SUB>2</SUB>O) as a reactant and 2000ml/min of nitrogen as carrier gas. With this condition, it is progressed for 1hr under different designated temperature(600, 700, 800℃) and different catalyst conditions. From those experiments, the carbon conversion ratio is calculated and compared the gasification reactivity
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