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(Dong Gun Lee),(Su Mi Choi),(Jung Hyun Choi),(Jin Hong Yoo),(Yoo Jin Kim),(Seok Lee),(Chang Ki Min),(Hee Je Kim),(Dong Wook Kim),(Jong Wook Lee),(Woo Sung Min),(Wan Shik Shin),(Chun Choo Kim),(Yoon He 대한내과학회 2002 The Korean Journal of Internal Medicine Vol.17 No.1
N/A Background : Infection is still a frequent cause of morbidity and mortality in acute myelogenous leukemia (AML) patients receiving chemotherapy. Recently the main cause of infection has changed from gram-negative to gram-positive bacteria and the resistance to antibiotics has increased. This study aimed to access the effectiveness of antimicrobial prophylaxis (AP) with orally absorbable antibiotics. Methods : Ninety-five AML patients receiving chemotherapy at Catholic Hemopoietic Stem Cell Transplantation Center from March 1999 to July 1999 were randomly divided into the AP group (250 mg ciprofloxacin twice a day, 150 mg roxithromycin twice a day, 50 mg fluconazole once a day) and the control group for a prospective analysis. Results : The incidence of fever was 82.6% in the AP group and 91.6% in the control group (p=0.15). Though classification and sites of infections showed no difference between the two groups, the catheter associated infection occurred more frequently in the AP group in significance. The time interval between initiation of chemotherapy and onset of fever, white blood cell (WBC) count at the onset of fever, duration of leukopenia (WBC <1,000/mm3), duration of systemic antibiotic therapy, mortality due to infection and hospitalization period from the data starting chemotherapy showed no differences between the two groups. Infections due to gram negative bacteria decreased to 33.3% in the AP group (vs. 92% in the control group), but infections due to gram positive bacteria increased to 66.7% (vs. 8% in the control group). Gram negative bacteria showed 100% resistance to ciprofloxacin in the AP group and gram-positive bacteria showed 90-100% resistance to erythromycin, regardless of the presence of AP. Conclusion : The AP could not reduce the occurrence of infection or infection associated death in AML patients receiving chemotherapy. On considering increased gram-positive infection and resistance to fluoroquinolone and macrolide, routine prescription of AP should be reconsidered. Further studi8S that assess the effectiveness of AP in other malignancies, aplastic anemia and bone marrow transplantation are required.
Multimodal Fusion and Data Augmentation for 3D Semantic Segmentation
Dong He,Furqan Abid,Jong-Hwan Kim 제어로봇시스템학회 2022 제어로봇시스템학회 국제학술대회 논문집 Vol.2022 No.11
Since modern autonomous driving (AD) platforms offer a variety of sensors, it is intuitive to leverage complementary data from multimodal sensors to produce reliable 3D semantic segmentation. However, due to the information loss and the sub-optimized fusion in multimodal fusion methods, LiDAR-only methods currently occupy the top positions in the leaderboard of datasets. In this paper, we focus on two aspects to improve the LiDAR-camera fusion semantic segmentation performance, namely data augmentation and fusion strategy. First, we propose an novel data augmentation by refining point-image patches. Second, we design an attention fusion block for the dual-branch segmentation network by considering the modality gap between LiDAR and RGB camera. Experiments on nuScences indicate that our proposed method outperforms the baseline methods on key classes.
Dong-Choon Uhm(엄동춘),Ji-Young Hwang(황지영),Myung-he Jun(전명희),Dong-ok Kim(김동옥) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.2
본 연구는 국내 임상간호사를 대상으로 기본소생술 수행을 설명하기 위한 가설적 모형을 설정하고 실증적 자료검증 을 통해 예측모형을 구축함으로써 국내 임상간호사의 기본소생술 수행 능력 향상을 위한 이론적 기틀을 제공하고자 한다. 본 연구는 2012년 10월 25일부터 2013년 2월 25일 까지 3차 의료기관 임상간호사 520명을 대상으로 설문조사를 시행하였으 며, 수집된 자료는 SPSS win 20.0와 AMOS 18.0 프로그램을 이용하여 분석하였다. 연구 결과 간호사의 기본소생술의 지식은 임상경험에 의해 직접적인 영향을 받았고, 임상경험은 기본소생술 수행의지에 간접적인 영향을 미쳤다. 지식과 임상경험의 기본소생술 수행의지에 대한 설명력은 19.5%이었다. 임상경험은 지식과 유의한 상관관계가 있었다(r=.61, p<.001). 따라서, 임상간호사의 기본소생술 수행의지를 높이기 위해 입원 환자의 질병 상태를 고려한 지식과 임상경험의 지속적인 교육이 필요하다. This study was conducted to develop a model that explains the factors influencing the clinical nurses' willingness to perform Basic Life Support and to verify the appropriateness of the model. The participants were 550 clinical nurses working at a university hospital in Korea. The data were collected from self-reported questionnaires from October 2012 to February 2013. A total of 520 questionnaires were analyzed using the SPSS/WIN 20.0 and Amos version 18.0 software packages. The results indicated that the clinical nurses' knowledge of basic life support had a direct impact and their clinical experience had an indirect impact on their willingness to perform basic life support at the scene. These variables together explained 19.5% of the variance in the nurses' willingness to perform Basic Life Support. The clinical experience was correlated significantly with knowledge (r=.61, p<.001). To increase the clinical nurses' performance of Basic Life Support, knowledge and clinical experience should be reinforced by continuous in-service education on Basic Life Support, considering the disease status of hospitalized patients.
Orthogonal 방법을 통한 Poly(AM-DMDAAC)/MMT 고흡수성나노복합체 제조 연구
Jun Dong Yuan,Ming Zhou,Shuang Qiao Yang,Yong Guo Zhou,Nan Qin,Song Tao He,Dong Lai,Zhong Qiang Xie 한국고분자학회 2014 폴리머 Vol.38 No.1
A novel poly(AM-DMDAAC)/MMT superabsorbent nanocomposites are prepared by radical polymerizationusing ammonium persulfate (APS) and anhydrous sodium sulfite as a free radical initiator and N,N-methylene bisacrylamide(MBA) as a crosslinker. In this paper, an optimization study on the synthesis of superabsorbent nanocompositesis carried out. Orthogonal array experiment indicates that the optimized conditions is acrylamide (AM) content 23 wt%,diallyl dimethyl ammonium chloride (DMDAAAC) content 6 wt%, montmorillonite (MMT) content 4 wt%, initiatorcontent 0.2 wt% and crosslinker content 0.02 wt%. Under the optimization syntheses conditions concluded, the maximumwater absorbency in distilled water is 659.53 g·g-1 and in 2 wt% sodium chloride solution is 116.25 g·g-1. Compared withthe range values of different factors (Rj), the order of significance factors in distilled water is C (MMT) > B (DMDAAC)> A (AM) > D (crosslinker) > E (initiator). MMT is intercalated during polymerization reaction and a nanocompositestructure is formed as shown by TEM analysis and XRD analysis.
Han, Dong He,Piao, Shang Guo,Song, Ji-Hyun,Ghee, Jung Yeon,Hwang, Hyeon Seok,Choi, Bum Soon,Kim, Jin,Yang, Chul Woo Lippincott WilliamsWilkins, Inc. 2010 Transplantation Vol.90 No.2
BACKGROUND.: The aim of this study was to observe the effect of sirolimus (SRL) on calcineurin inhibitor (CNI)-induced nephrotoxicity in the aging process by using renal expression of KLOTHO, an antiaging gene. METHODS.: Mice were treated with vehicle (VH; 1 mL/kg/day of olive oil), cyclosporine A (CsA; 30 mg/kg/day), or tacrolimus (FK; 1 mg/kg/day) with or without SRL (0.3 mg/kg/day) for 2 weeks. KLOTHO expression was evaluated by using reverse-transcriptase polymerase chain reaction, immunoblotting, and immunohistochemistry. Oxidative stress was evaluated by using immunohistochemistry and urinary excretion of 8-hydroxy-2&vprime;-deoxyguanosine (8-OHdG). The calcium metabolism was evaluated by using renal ectopic calcification, serum intact parathyroid hormone level, and renal fibroblast factor 23 (FGF23) expression. RESULTS.: Treatment with CsA or FK alone significantly decreased KLOTHO expression and increased urinary 8-OHdG excretion compared with VH treatment but SRL treatment did not. Treatment SRL+CsA or SRL+FK further decreased KLOTHO expression and increased urinary 8-OHdG excretion compared with treatment of CsA or FK alone. There was a strong correlation between KLOTHO expression and urinary 8-OHdG excretion (r=−0.893; P<0.001). Treatment of CsA or FK alone increased renal ectopic calcification and serum intact parathyroid hormone level and decreased renal FGF23 expression compared with VH treatment (P<0.05) but SRL treatment did not. Treatment with SRL+CNI aggravated these parameters compared with CNI alone. CONCLUSIONS.: SRL accelerates the CNI-induced oxidative process by down-regulating the renal antioxidant KLOTHO expression in the kidney.