Ruptured Spinal Dermoid Cysts with Lipid Droplets into the Syrinx Cavity : Reports of Fourteen Cases

Cheng, Cheng,Li, Rong,Gao, Haihao,Tao, Benzhang,Wang, Hui,Sun, Mengchun,Gao, Gan,Wang, Jianzhen,Shang, Aijia The Korean Neurosurgical Society 2022 Journal of Korean neurosurgical society Vol.65 No.3

Objective : Dermoid cysts are uncommon in spinal cord tumors, and the phenomenon of their spontaneous rupture into the syrinx cavity is quite rare. We aimed to analyze the imaging characteristics and etiologies, and propose some surgical strategies, for this uncommon phenomenon. Methods : We retrospectively reviewed 14 cases with spinal dermoid cysts that ruptured into the cervical and thoracic syrinx cavity. There were six male and eight female cases, aged 21 to 46 years, who had lipid droplets in the syrinx cavity from C1 to L3. The dermoid cysts were always located at the conus. Based on patients' complaints, clinical manifestations, and imaging results, we adopted tumor excision and/or syrinx cavity aspiration in one stage or multiple stages. Results : Three patients had only a syrinx cavity aspiration surgery due to a history of dermoid cyst excision. Eight patients had dermoid cyst resection and syrinx cavity aspiration in one stage. One patient was operated upon in two stages due to the development of new symptoms at nine months follow-up. Two patients underwent only tumor resection since they did not show similar symptoms or signs caused by the cervicothoracic syrinx. The axial magnetic resonance imaging indicated that the lipid droplets were always not at the center but were eccentric. The clinical effect was satisfactory during the follow-up period in this group. Conclusion : The lipid droplets filled the spinal syrinx cavity, not entirely confined to the central canal. Based on the chief complaints and associated signs, we adopted different surgical strategies and had satisfactory clinical results.

CSR활동이 기업 내부효과에 미치는 영향 연구

고성성(Gao, Cheng Cheng),배정한(Bae, Jung Han),김귀옥(Kim, Gi Ok) 영남대학교 중국연구센터 2014 중국과 중국학 Vol.22 No.-

최근에 중국에서도 기업의 지속가능경영을 위해 종업원을 만족시켜야 한다는 내부 마케팅에 대한 관심이 높아져 가고 있다. 따라서 본 연구는 중국기업의 CSR활동이 기업 내의 종업원에게 어떠한 영향을 미치는가를 분석하고, 이러한 분석결과를 바탕으로 기업들에게 시사점을 제시함을 목적으로 하고 있다. 이를 위해 첫째, 선행연구를 통하여 CSR 활동의 영향을 받는 내부 효과변인과 커뮤니케이션 효과모델을 결합한 “인식-태도-행동”에 따른 연구모형을 기초로 하여 연구모형을 제시하였으며, 둘째, 중국 기업의 CSR 활동에 대한 내부 종업원들의 인식이 내부요인(CSR태도, 직무만족, 조직시민행동)에 어떠한 영향이 있는지와 내부요인들간의 상관성에 대하여 분석하였으며, 셋째, CSR활동의 내부효과 변인의 하나인 직무만족이 이직의도에 어떠한 영향을 미치는가를 분석하고 있다. 넷째, 이러한 분석들을 통하여 기업들에게 중국에서의 CSR활동에 대한 시사점들을 다음과 가타이 제시하였다. 첫째, CSR 인식은 CSR 태도, 직무만족과 조직시민행동에 대해 직접적인 영향을 미치는 것으로 확인되었으며, CSR태도는 직무만족과 조직시민행동에 직접적인 영향을 미치는 것으로 나타났다. 둘째, 최근 중국에서 시민의식이 급속하게 확장되고 있고, 또한 새롭게 출범한 시진핑 정부는 그간의 성장일변도의 정책에서 복지와 분배를 중심으로 하는 정책으로 방향을 전환하고 있다. 따라서 향후 중국의 시민들은 사회적 문제점들에 대하여 적극적으로 인식하고 또한 의견을 표출할 가능성이 많으며, 그 중에서 기업들에게는 CSR 활동에 대한 요구의 정도가 점점 더 강화될 것이라고 판단된다. 마지막으로 오늘날 중국에서 급속한 경제발전으로 동서간의 빈부격차, 부정부패, 노동력 수급, 환경문제 등의 심각한 사회문제가 대두되었음에도 선진국들에 비해 여전히 CSR 활동의 중요성에 대한 인식률이 낮다고 할 수 있다. This study empirically examines the internal effects on a firm’s corporate social responsibility activities focusing on the coastal area of China’s Shandong province. In order to conduct this research, previous research on CSR activities of Chinese companies’ awareness of the internal employee attitude, job satisfaction and organizational citizenship behavior were analyzed to determine if there was any impact on the correlation between the internal factors examined. And CSR activities through job satisfaction on turnover intentions were analyzed with an impact analysis. The result are as follows. The awareness of CSR is directly effected with CSR attitude, job satisfaction, and organizational citizenship behavior positively, and CSR attitude is not directly related with job satisfaction and organizational citizenship behavior. Job satisfaction is not directly related with organizational citizenship behavior.

ABS ALGORITHM FOR SOLVING A CLASS OF LINEAR DIOPHANTINE INEQUALITIES AND INTEGER LP PROBLEMS

Gao, Cheng-Zhi,Dong, Yu-Lin Korean Society of Computational and Applied Mathem 2008 Journal of applied mathematics & informatics Vol.26 No.1

Using the recently developed ABS algorithm for solving linear Diophantine equations we introduce an algorithm for solving a system of m linear integer inequalities in n variables, m $\leq$ n, with full rank coefficient matrix. We apply this result to solve linear integer programming problems with m $\leq$ n inequalities.

Wind velocity simulation of spatial three-dimensional fields based on autoregressive model

Gao, Wei-Cheng,Yu, Yan-Lei Techno-Press 2008 Wind and Structures, An International Journal (WAS Vol.11 No.3

This paper adopts autoregressive (AR) model to simulate the wind velocity of spatial three-dimensional fields in accordance with the time and space dependent characteristics of the 3-D fields. Based on the built MATLAB programming, this paper discusses in detail the issues of the AR model deduced by matrix form in the simulation and proposes the corresponding solving methods: the over-relaxation iteration to solve the large sparse matrix equations produced by large number of degrees of freedom of structures; the improved Gauss formula to calculate the numerical integral equations which integral functions contain oscillating functions; the mixed congruence and central limit theorem of Lindberg-Levy to generate random numbers. This paper also develops a method of ascertaining the rank of the AR model. The numerical examples show that all those methods are stable and reliable, which can be used to simulate the wind velocity of all large span structures in civil engineering.

Impact of network settings on reinforcement learning based caching policy in cooperative edge networks

Cheng Xiaobao,Gao Minghan,Gao Qiang,Peng Xiao-Hong 한국통신학회 2023 ICT Express Vol.9 No.6

Reinforcement learning (RL) has been used in combination with cooperative caching to deal with growing traffic in mobile networks, but the performance of RL based caching policies depends heavily on network settings. This paper investigates the impact of access delays within network infrastructures and popularity and similarity properties of the contents requested on network performance. A deep Q-network based caching framework is established in both basic and extended cooperative edge networks. Our simulation results reveal explicit relationships between the performance and influential parameters, which can provide a guidance and benchmark for the design of effective caching polices with RL and cooperation technologies.

ABS algorithm for solving a class of linear Diophantineinequalities and integer LP problems

Cheng-Zhi Gao,Yu-Lin Dong 한국전산응용수학회 2008 Journal of applied mathematics & informatics Vol.26 No.1

Using the recently developed ABS algorithm for solving linear Diophantine equations we introduce an algorithm for solving a system of m linear integer inequalities in n variables, m≤n, with full rank coefficient matrix. We apply this result to solve linear integer programming problems with m≤n inequalities.

Comparison of the Gene Expression Profiles Between Smokers With and Without Lung Cancer Using RNA-Seq

Cheng, Peng,Cheng, You,Li, Yan,Zhao, Zhenguo,Gao, Hui,Li, Dong,Li, Hua,Zhang, Tao Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.8

Lung cancer seriously threatens human health, so it is important to investigate gene expression changes in affected individuals in comparison with healthy people. Here we compared the gene expression profiles between smokers with and without lung cancer. We found that the majority of the expressed genes (threshold was set as 0.1 RPKM) were the same in the two samples, with a small portion of the remainder being unique to smokers with and without lung cancer. Expression distribution patterns showed that most of the genes in smokers with and without lung cancer are expressed at low or moderate levels. We also found that the expression levels of the genes in smokers with lung cancer were lower than in smokers without lung cancer in general. Then we detected 27 differentially expressed genes in smokers with versus without lung cancer, and these differentially expressed genes were foudn to be involved in diverse processes. Our study provided detail expression profiles and expression changes between smokers with and without lung cancer.

An Optimization Algorithm with Novel Flexible Grid: Applications to Parameter Decision in LS-SVM

Gao, Weishang,Shao, Cheng,Gao, Qin Korean Institute of Information Scientists and Eng 2015 Journal of Computing Science and Engineering Vol.9 No.2

Genetic algorithm (GA) and particle swarm optimization (PSO) are two excellent approaches to multimodal optimization problems. However, slow convergence or premature convergence readily occurs because of inappropriate and inflexible evolution. In this paper, a novel optimization algorithm with a flexible grid optimization (FGO) is suggested to provide adaptive trade-off between exploration and exploitation according to the specific objective function. Meanwhile, a uniform agents array with adaptive scale is distributed on the gird to speed up the calculation. In addition, a dominance centroid and a fitness center are proposed to efficiently determine the potential guides when the population size varies dynamically. Two types of subregion division strategies are designed to enhance evolutionary diversity and convergence, respectively. By examining the performance on four benchmark functions, FGO is found to be competitive with or even superior to several other popular algorithms in terms of both effectiveness and efficiency, tending to reach the global optimum earlier. Moreover, FGO is evaluated by applying it to a parameter decision in a least squares support vector machine (LS-SVM) to verify its practical competence.

Relationship Between PTEN and Livin Expression and Malignancy of Renal Cell Carcinomas

Cheng, Tao,Zhang, Jian-Guo,Cheng, Yuan-He,Gao, Zhong-Wei,Ren, Xiao-Qiang Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.6

Objectives: This study focused on PTEN and Livin expression and associations with malignancy in human renal clear cell carcinomas (RCCC). Methods: PTEN and Livin expression was assessed in 100 RCCC tissue samples, 50 paracarcinoma cases, and 20 normal renal tissue samples using the immunohistochemical Streptavidin proxidase (SP) method. The relationships between binding and corresponding biological characteristics, such as histological grade, lymph node metastases, and clinical stages were analyzed. Results: Positive PTEN expression in RCCC was significantly lower than in renal tissue adjacent to carcinoma tissue and normal renal tissue (P<0.01). Livin expression in the renal tissue adjacent to the carcinoma and normal renal tissues exhibited only low levels, whereas overall Livin expression in RCCC was statistically significant (P<0.01). In RCCC, PTEN expression rate gradually decreased with an increase in clinical stage, whereas that of Livin increased to statistically significant levels (P<0.01), PTEN and Livin levels being negatively correlated (r=-0.395, P<0.01). Conclusions: PTEN and Livin are important in RCCC development. The two factors combined are expected to provide indices for estimating RCCC malignancy and progression levels, as well as references for RCCC diagnosis and treatment.

Bicluster and Pathway Enrichment Analysis of HCV-induced Cirrhosis and Hepatocellular Carcinoma

Cheng, Peng,Cheng, You,Su, Mei X.,Li, Dong,Zhao, Guo Z.,Gao, Hui,Li, Yan,Zhu, Jie Y.,Li, Hua,Zhang, Tao Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.8

Background: Hepatocellular carcinoma (HCC) is the sixth most common cancer worldwide and the most common form of liver cancer. However, while it is associated frequently with hepatitis C virus (HCV) there is only an elementary understanding of its molecular pathogenesis. Methods: To gain insight into the molecular mechanisms of HCV-induced hepatocarcinogenesis, we performed microarray analysis on 75 surgical liver samples from 48 HCV-infected patients. Results: There were 395 differentially expressed geness between cirrhotic samples and HCC samples. Of these, 125 genes were up-regulated and 270 genes were down-regulated. We performed pathway enrichment analysis and screened as described previously. Conclusions: The differentially expressed genes might be involved in hepatocarcinogenesis through upregulating the pathways of ECM-receptor interaction, focal adhesion, cell adhesion molecules and other cancer-related pathways, and downregulating the pathways of "complement and coagulation cascades". We hope our results could aid in seeking of therapeutic targets for HCV-induced hepatocellular carcinoma.