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Room Temperature Preparation of Poly-Si Thin Films by IBE with Substrate Bias Method
Cho, Byung-Yoon,Yang, Sung- Chae,Han, Byoung-Sung,Lee, Jung-Hui,Yatsui Kiyoshi The Korean Institute of Electrical and Electronic 2005 Transactions on Electrical and Electronic Material Vol.6 No.2
Using intense pulsed ion beam evaporation technique, we have succeeded in the preparation of poly crystalline silicon thin films without impurities on silicon substrate. Good crystallinity and high deposition rate have been achieved without heating the substrate by using lEE. The crystallinity of poly-Si film has been improved with the high density of the ablation plasma. The intense diffraction peaks of poly-Si thin films could be obtained by using the substrate bias system. The crystallinity and the deposition rate of poly-Si thin films were increased by applying (-) bias voltage for the substrate.
Experience of treatment of patients with granulomatous lobular mastitis
Sung Mo Hur,Dong Hui Cho,Se Kyung Lee,Min-Young Choi,Soo Youn Bae,Min Young Koo,Sangmin Kim,Jun-Ho Choe,Jung-Han Kim,Jee Soo Kim,Seok-Jin Nam,Jung-Hyun Yang,Jeong Eon Lee 대한외과학회 2013 Annals of Surgical Treatment and Research(ASRT) Vol.85 No.1
Purpose: To present the author’s experience with various treatment methods of granulomatous lobular mastitis (GLM) and to determine effective treatment methods of GLM. Methods: Fifty patients who were diagnosed with GLM were classified into five groups based on the initial treatment methods they underwent, which included observation (n = 8), antibiotics (n = 3), steroid (n = 13), drainage (n = 14), and surgical excision (n = 12). The treatment processes in each group were examined and their clinical characteristics, treatment processes, and results were analyzed respectively. Results: Success rates with each initial treatment were observation, 87.5%; antibiotics, 33.3%; steroids, 30.8%; drainage, 28.6%; and surgical excision, 91.7%. In most cases of observation, the lesions were small and the symptoms were mild. A total of 23 patients underwent surgical excision during treatment. Surgical excision showed particularly fast recovery, high success rate (90.3%) and low recurrence rate (8.7%). Conclusion: The clinical course of GLM is complex and the outcome of each treatment type are variable. Surgery may play an important role when a lesion is determined to be mass-forming or appears localized as an abscess pocket during breast examination or imaging study.
Clinical Significance of Slow Recovery of Graft Function in Living Donor Kidney Transplantation
Lee, So Young,Chung, Byung Ha,Piao, Shang Guo,Kang, Seok Hui,Hyoung, Bok Jin,Jeon, Youn Joo,Hwang, Hyeon Seok,Yoon, Hye Eun,Choi, Bum Soon,Kim, Ji-Il,Moon, In Sung,Kim, Yong-Soo,Choi, Yeong Jin,Yang, Lippincott Williams Wilkins, Inc. 2010 Transplantation Vol.90 No.1
BACKGROUND.: The clinical significance of slow recovery of graft function (SGF) in living donor kidney transplantation is unclear. We evaluated the incidence, risk factors, and clinical outcome of SGF in living donor transplantation. METHODS.: Three hundred ten living donor kidney recipients were included and categorized into immediate recovery of graft function (IGF; n=239) and SGF (n=71), according to estimated glomerular filtration rate (60 mL/min/1.73 m) at posttransplant day 14. We compared the clinical parameters, protocol biopsy findings, acute rejection (AR), and 10-year graft survival between the two groups. RESULTS.: The SGF group had an older recipient age, lower ratio of donor to recipient body mass index, and higher incidence of AR than IGF group, as shown by protocol biopsies. The SGF group had significantly more AR episodes than IGF group within 12 months (21.1% vs. 13.4%, P<0.05) and during follow-up period (32.4% vs. 20.1%, P<0.05). The 10-year graft survival rate did not differ between groups, but AR presence was significantly associated with a lower graft survival in the SGF group than the IGF group (64.9% vs. 78.9%, P<0.05). CONCLUSIONS.: SGF in the early posttransplant period is immunologically active and should be considered as one of the risk factors for determining long-term graft survival in living donor kidney transplantation.
( Sung Bae Cho ),( Jongmin Lee ),( Hyeon Hui Kang ),( Hwa Sik Moon ),( Sang Haak Lee ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1
Background: Recent researches suggest that chronic obstructive pulmonary disease (COPD) is associated with an increased risk of peptic ulcer disease, but limited data exist on affecting factors in COPD patient with peptic ulcer disease on gastroduodenoscopy. Methods: We retrospectively reviewed medical records on 237 COPD patients who performed gastroduodenoscopy in 2003-2013. Patients were divided into two groups accordingly: peptic ulcer (gastric and/or duodenal ulcer) group and non-ulcerative disease group. Statistical analyses were performed with the logistic regression model to obtain the factors affecting peptic ulceration in COPD patients, controlling confounding factors. Results: The prevalence of peptic ulcer disease was 99 of 237 COPD patients (41.7%) and a male sex had a positive association with peptic ulcer disease (odds ratio[OR], 2.270, 95% confidence interval[CI], 1.189 to 4.332). There was independent relationships between the presence of peptic ulcer disease and both liters of predicted forced expiratory volume in 1s (FEV1) (OR, 0.407, 95% CI, 0.229 to 0.724) and liters of functional vital capacity (FVC) (OR, 1.029, 95% CI, 1.011 to 1.048). Smoking status and corticosteroids, known risk factors of peptic ulcer disease in general population, did not showed expected affect on peptic ulceration. Conclusions: Our findings provide further evidence that COPD is associated with peptic ulcer disease and there is an increased risk for peptic ulcer associated with COPD severity.
Hui Joon Park,Seung Min Hong,Sang-Soo Lee,Junkyung Kim,Min Park IEEE 2008 IEEE TRANSACTIONS ON ADVANCED PACKAGING Vol.31 No.2
<P>A new type of composite filler mechanically treated with multi-walled carbon nanotubes (MWNTs) and (BT) particles was prepared to produce higher dielectric properties in the composite. The hybrid film fabricated by incorporating these composite fillers in an epoxy matrix had a high dielectric constant and similar dielectric loss as compared to the composite which contained neat BT particles. The dielectric properties of these hybrid films were found to be dependent on both the content of MWNTs and mechanical processing time. Results suggest that this novel hybrid film composed of the composite filler and the epoxy matrix can be used for embedded capacitor material.</P>
Lee, Hui-Young,Cho, Sun-A,Lee, In-Soo,Park, Jong-Hwan,Seok, Seung-Hyeok,Baek, Min-Won,Kim, Dong-Jae,Lee, Seok-Ho,Hur, Sook-Jin,Ban, Sang-Ja,Lee, Yoo-Kyoung,Han, Yang-Keum,Cho, Young-Keun,Park, Jae-Hak Oxford University Press 2007 FEMS IMMUNOLOGY AND MEDICAL MICROBIOLOGY Vol.51 No.2
<P>The attenuation and immunoenhancing effects of rpoS and phoPSalmonella enterica serovar strain Typhi (Salmonella typhi) mutants have not been compared. Here, three S. typhi deletion mutants (phoP, rpoS, and rpoS-phoP double mutant) are constructed and these mutants are characterized with respect to invasiveness, virulence, and protective immune response compared with wild-type Ty2. It was found that phoP and phoP-rpoS deletion mutants are less invasive to HT-29 cells than the wild-type Ty2 and the rpoS single-deleted strain. The LD(50) of immunized mice was higher for phoP than for rpoS mutants, and the highest for the phoP-rpoS double mutant. In addition, all S. typhi mutants showed an increase in the specific serum IgG levels and T-cell-mediated immunity, and showed equal protection abilities against a wild-type Ty2 challenge after two rounds of immunization in BALB/c mice. It is concluded that phoP genes appear to play a more important role than rpoS genes in both cellular invasion and virulence of S. typhi, but not in immunogenicity in mice. Furthermore, the data indicate that the phoP-rpoS double mutant may show promise as a candidate for an attenuated typhoid vaccine.</P>
Lee, Sang-Gon,Lim, Meng-Hui,Lee, Hoon-Jae The Korea Institute of Information and Commucation 2009 Journal of information and communication convergen Vol.7 No.3
Multi-server password authentication schemes enable remote users to obtain service from multiple servers with single password without separately registering to each server. In 2007, Hu-Niu-Yang proposed an improved efficient password authenticated key agreement scheme for multi-server architecture based on Chang-Lee's scheme proposed in 2004. This scheme is claimed to be more efficient and is able to overcome a few existing deficiencies in Chang-Lee's scheme. However, we find false claim of forward secrecy property and some potential threats such as offline dictionary attack, key-compromise attack, and poor reparability in their scheme. In this paper, we will discuss these issues in depth.