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윤찬호,석경휴,나기창,배철수,나상동 조선대학교 전자정보통신연구소 2002 電子情報通信硏究所論文誌 Vol.5 No.1
Java applets are downloaded from web server through internet and executed in Java Virtual Machine of clients' browser. Before execution of java applets, JVM checks bytecode program with bytecode verifier and performs runtime tests with interpreter. However, these tests will not protect against undesirable runtime behavior of java applets, such as denial of service attack, email forging attack, URL spoofing attack, or annoying sound attack. In order to protect malicious applets, a technique used in this paper is java bytecode modification. This technique is used to restrict applet behavior or insert code appropriate to profiling or other monitoring efforts. Java byte modification is divided into two general forms, class-level modification involving subclassing non-final classes and method-level modification used when control over objects from final classes or interface. This paper showed that malicious applets are controlled by java bytecode modification using proxy server. This implementation does not require any changes in the web sever, JVM or web browser.
장은진,한미라,정철호 대한생물치료정신의학회 2001 생물치료정신의학 Vol.7 No.2
Objectives : This study is aimed at determining how the reliability of the results of the Korean Personality Inventory for Children(KPI-C) is affected according to the results of Minnesota Multiphasic Personality Inventory(MMPI) of the mothers. It is also intended to determine the mothers’ characteristics to considered at the interpretation or evaluation of the results of the test and investigate the correlation between the psychological problems of the mothers and their children. Methods : The subjects of this study were 43 mothers whose children visited the psychiatric department at Dongsan Hospital, Keimyung University from August 1998 until Jun 1999. They were administered with both MMPI and KPI-C Inventory. They were sorted into two group ; diagnosis consistent group and diagnosis inconsistent group depending on whether or not the KPI-C results mothers reported matched the clinical diagnosis of children. The motehrs’ variables and the results of MMPI were compared between the two groups. The correlation of MMPI and KPI-C was also studied. The statistical analysis was conducted using Independent samples t-test, χ^2-test, and Person correlation analysis. Statistical significance was p<0.05. Results : 1) In the whole group, the diagnosis consistent group was 29 people(67.2%) and the diagnosis inconsistent group was 14 people(32.8%). 2) The mothers’ MMPI results of the two groups belonged to the normal range. 3) There was no significant difference between the two group in their age, educational level, and job. 4) In comparing MMPI of the groups, the diagnosis inconsistent group showed significantly higher scores in L and K scales, and the diagnosis consistent group had higher scores in F, Hs, D, Hy, and Pa scales. 5) The correlation analysis of the validity scales of MMPI and the scales of KPI-C showed significantly negative correlation in the L scale f MMPI and FAM scale of KIP-C, K scale of MMPI and F, SOM, DLQ, PSY scales of KPI-C, On the other hand, the analysis showed significantly positive correlation in the K scale of MMPI and ERS scale of KPI-C, F scale of MMPI and DEP, SOM scales of KPI-C. 6) The correlation analysis of the clinical scales of MMPI and the scales of KPI-C showed significantly positive correlation in the Hs scales of MMPI and F, ANX, DEP, SOM of KPI-C, D scales of MMPI and ANX, DEP, SOM SOC, of KPI-C, Hy scales of MMPI and F, ANX, DEP, SOM, HPR, FAM scales of KPI-C, Pd scales of MMPI and DEP, SOM, FAM scales of KPI-C. It also showed significantly positive correlation in the Pa of MMPI and ANX, SOM scales of KPI-C, Pt scales of MMPI and PDL, ANX, DEP, SOM, FAM, PSY scales of KPI-C, Sc scales of MMPI and F, DEP, SOM, FAM, PSY scales of KPI-C, Ma scales of MMPI and F, SOM, FAM scales of KPI-C, Si scales of MMPI and SOM scales of KPI-C. On the other hand, the analysis showed significantly negative correlation in the Hs, D, Hy, Pt, Sc scales of MMPI and ERS scales of KPI-C. Conclusion : It is shown that the characteristics of the mothers’ personality have important effects on the perception of their children’s problems. In particular, the stronger the mothers’ defensive characteristics are, the lower the reliability of their perception of the children’s problems. On the other hand, the reliability is high when the mothers acknowledge their problems and perceive their children’s responses sensitively. Accordingly, it will hereafter be necessary to consider the characteristics of mothers’ personality at the interpretation or diagnosis of the results of children’s evaluation that mothers report. It is also shown that there is a significant correlation between the psychological problems of the mothers and their children.
정신분열병 환자에서 얼굴 영상의 작동기억 장애 : 기능자기공명영상연구
이창욱,김태석,주라형,박주미,박여진,김종진,전신수,배치운,김정진,이수정,이철,백인호 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.2
Objectives : Impaired processing of facial information is one of the broad ranges of cognitive deficits seen in patients with Schi-zophrenia. We aimed to elucidate the differences in brain activities involved in the process of facial working memory between schizophrenic patients and healthy comparison subjects. Methods : Twelve patients with schizophrenia were recruited along with twelve demographically matched healthy volunteers as a comparison group. Functional magnetic resonance imaging (fMRI) was used to assess cortical activities during the Perfor-mance of a 2-back working memory paradigm using images of neutral faces as mnemonic content. Rcsults : The patient group performed the tasks with reduced accuracy. Group analysis revealed that the left fusiform gyrus, the right superior frontal gyrus, the bilateral middle frontal gyri/insula, the left middle temporal gyrus, the precuneus, the quadrangular lobules and the vermis of cerebellum showed decreased cortical activities in the patient group. On the other hand, an increased level of activation in the lateral prefrontal cortex and the pahetal lobule was observed from the patient group, all in the right hemisphere. Conulusion : A decreased level of activity in the left fusiform gyrus among the patient group implicates inefficient processing of facial information. An increased level of activation in prefrontal and parietal neural networks from the patient group confirms earlier findings on the impaired working memory of patients with schizophrenia.
Ra, Ho Jong,Lee, Hyun Jae,Jo, Ho Seung,Nam, Dae Cheol,Lee, Young Bok,Kang, Byeong Hun,Moon, Dong Kyu,Kim, Dong Hee,Lee, Choong Jae,Hwang, Sun-Chul The Korean Society of Pharmacology 2017 The Korean Journal of Physiology & Pharmacology Vol.21 No.1
We investigated whether betulin affects the gene expression, secretion and proteolytic activity of matrix metalloproteinase-3 (MMP-3) in primary cultured rabbit articular chondrocytes, as well as in vivo production of MMP-3 in the rat knee joint to evaluate the potential chondroprotective effect of betulin. Rabbit articular chondrocytes were cultured and reverse transcription-polymerase chain reaction (RT-PCR) was used to measure interleukin-$1{\beta}$ ($IL-1{\beta}$)-induced gene expression of MMP-3, MMP-1, MMP-13, a disintegrin and metalloproteinase with thrombospondin motifs-4 (ADAMTS-4), ADAMTS-5 and type II collagen. Effect of betulin on IL-$1{\beta}$-induced secretion and proteolytic activity of MMP-3 was investigated using western blot analysis and casein zymography, respectively. Effect of betulin on MMP-3 protein production was also examined in vivo. The results were as follows: (1) betulin inhibited the gene expression of MMP-3, MMP-1, MMP-13, ADAMTS-4, and ADAMTS-5, but increased the gene expression of type II collagen; (2) betulin inhibited the secretion and proteolytic activity of MMP-3; (3) betulin suppressed the production of MMP-3 protein in vivo. These results suggest that betulin can regulate the gene expression, secretion, and proteolytic activity of MMP-3, by directly acting on articular chondrocytes.
Ho Jong Ra,Hyun Jae Lee,Ho Seung Jo,Dae Cheol Nam,Young Bok Lee,Byeong Hun Kang,Dong Kyu Moon,Dong Hee Kim,Choong Jae Lee,Sun-Chul Hwang 대한생리학회-대한약리학회 2017 The Korean Journal of Physiology & Pharmacology Vol.21 No.1
We investigated whether betulin affects the gene expression, secretion and proteolytic activity of matrix metalloproteinase-3 (MMP-3) in primary cultured rabbit articular chondrocytes, as well as <i>in vivo</i> production of MMP-3 in the rat knee joint to evaluate the potential chondroprotective effect of betulin. Rabbit articular chondrocytes were cultured and reverse transcription-polymerase chain reaction (RT-PCR) was used to measure interleukin-1β (IL-1β)-induced gene expression of MMP-3, MMP-1, MMP-13, a disintegrin and metalloproteinase with thrombospondin motifs-4 (ADAMTS-4), ADAMTS-5 and type II collagen. Effect of betulin on IL-1β-induced secretion and proteolytic activity of MMP-3 was investigated using western blot analysis and casein zymography, respectively. Effect of betulin on MMP-3 protein production was also examined<i> in vivo</i>. The results were as follows: (1) betulin inhibited the gene expression of MMP-3, MMP-1, MMP-13, ADAMTS-4, and ADAMTS-5, but increased the gene expression of type II collagen; (2) betulin inhibited the secretion and proteolytic activity of MMP-3; (3) betulin suppressed the production of MMP-3 protein<i> in vivo</i>. These results suggest that betulin can regulate the gene expression, secretion, and proteolytic activity of MMP-3, by directly acting on articular chondrocytes.