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Virtual Queue Based QoS Layered Vertical Mapping in Wireless Networks
( Shu-guang Fang ),( Ri-zhao Tang ),( Yu-ning Dong ),( Hui Zhang ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.6
Wireless communication is one of most active areas in modern communication researches, QoS (Quality of Service) assurance is very important for wireless communication systems design, especially for applications such as streaming video etc., which requires strict QoS assurance. The modern wireless networks multi-layer protocol stack structure results in QoS metrics layered and acting in cascade and QoS metrics vertical mapping between protocol layers. Based on virtual buffer between protocol layers and queuing technology, a unified layered QoS mapping framework is proposed in this paper, in which we first propose virtual queue concept, give a novelty united neighboring protocol layers QoS metric mapping framework, and analysis method based on dicerete-time Markov chain, and numerical results show that our proposed framework represents a significant improvement over previous model.
Xiao-Guang Dong,Li-Bing Gao,Hai-Jun Zhang,Jing Wang,Kai Qiu,Guang-Hai Qi,Shu-Geng Wu 한국축산식품학회 2021 한국축산식품학회지 Vol.41 No.6
This study discriminated fatty acid profile and flavor characteristics of Beijing You Chicken (BYC) as a precious local breed and Dwarf Beijing You Chicken (DBYC) eggs. Fatty acid profile and flavor characteristics were analyzed to identify differences between BYC and DBYC eggs. Four classification algorithms were used to build classification models. Arachidic acid, oleic acid (OA), eicosatrienoic acid, docosapentaenoic acid (DPA), hexadecenoic acid, monounsaturated fatty acids (MUFA), polyunsaturated fatty acids (PUFA), unsaturated fatty acids (UFA) and 35 volatile compounds had significant differences in fatty acids and volatile compounds by gas chromatographymass spectrometry (GC-MS) (p<0.05). For fatty acid data, k-nearest neighbor (KNN) and support vector machine (SVM) got 91.7% classification accuracy. SPME-GC-MS data failed in classification models. For electronic nose data, classification accuracy of KNN, linear discriminant analysis (LDA), SVM and decision tree was all 100%. The overall results indicated that BYC and DBYC eggs could be discriminated based on electronic nose with suitable classification algorithms. This research compared the differentiation of the fatty acid profile and volatile compounds of various egg yolks. The results could be applied to evaluate egg nutrition and distinguish avian eggs.
기초 :In Situ Film Zymography를 이용한 신경교종의 기질 금속단백분해효소 활성도 관찰
김서광 ( Shu Guang Jin ),정신 ( Shin Jung ),문경섭 ( Kyung Sub Moon ),김인영 ( In Young Kim ),배검 ( Jian Pei ),정태영 ( Tae Young Jung ) 대한뇌종양학회 2009 대한뇌종양학회지 Vol.8 No.1
Introduction:Glioma is a common brain tumor, during the initial stage of oncogenesis, there are both invasions of normal tissues nearby and metastasis to contralateral cerebral hemisphere. Among the tumor invasion factors, matrix metalloproteinases( MMPs) facilitates the invasiveness of tumor cells and is highly expressed in malignant brain tumors. This study is to investigate the level of MMP expression, its location in glioma, using in situ film zymography. Materials and Methods:Thirteen glioblastoma samples and 5 oligodendroglioma samples were studied. Using in situ film zymography method, we classified the MMP expression into 4 patterns, such as tumor center, margin, both(center & margin), and negative. Results:In glioblastoma samples, 10 samples(76.9%) were positive. Among them, 7 expressed the pattern of margin. In 5 oligodendroglioma samples, only one anaplastic oligodendroglioma which was transformed from oligodendroglioma, expressed as marginal pattern. There was no MMPs expression in normal brain tissues. Conclusion:The conclusion of this study is that MMPs highly expressed in glioblastoma, and mostly in the pattern of margin. MMPs is thought to be secreted by tumor cells and it may be practical of using MMP inhibitor during the treatment of glioma patients.
Jin, Shu-Guang,Jeong, Young-Il,Jung, Shin,Ryu, Hyang-Hwa,Jin, Yong-Hao,Kim, In-Young The Korean Neurosurgical Society 2009 Journal of Korean neurosurgical society Vol.46 No.5
Objective : Hyaluronidase (HAse), a degrading enzyme of hyaluronic acid (HA), is highly expressed in patients with malignant glioma. The purpose of this study was to verify whether HAse is related to the invasion of glioma cells. We also investigated if glioma cells with higher mobility in 2-dimensioal (2-D) method have also higher mobility at 3-dimensional (3-D) environment. Methods : Malignant glioma cell lines (U87MG, U251MG, U343MG-A, and U373MG) were used, and their HAse expressions were evaluated by HA zymography. The migration ability was evaluated by simple scratch technique. The invasiveness of each cell lines was evaluated by Matrigel invasion assay and HA hydrogel invasion assay. In HA hydrogel invasion assay, colonies larger than $150\;{\mu}m$ were regarded as positive ones and counted. Statistical analysis of migration ability and invasion properties of each cell lines was performed using t-test. Results : In scratch test to examine migration ability of each cell lines, U87MG cells were most motile than others, and U343MG-A least motile. The HAse was expressed in U251MG and U343MG-A cell lines. However, U87MG and U373MG cell lines did not express HAse activity. In Matrigel invasion assay, the cell lines expressing HAse (U251MG and U343MG-A) were more invasive in the presence of HA than HAse deficient cell lines (U87MG and U373MG). In HA hydrogel invasion assay, the HAse-expressing cell lines formed colonies more invasively than HAse-deficient ones. Conclusion : Malignant Glioma cells expressing HAse were more invasive than HAse-deficient ones in 3-dimensional environment. Therefore, it might be suggested that invasion of malignant gliomas is suppressed by inhibition of HAse expression or HA secretion. Additionally, the ability of 2-D migration and 3-D invasion might not be always coincident to each other in malignant glioma cells.
Shu Yi Chu,Ji Bo Xiao,Guang Ming Tian,Ming Hung Wongb 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
Preparation of activated carbon from Thalia dealbata was carried out. The T. dealbata-derived activated carbon (TDAC) was characterized by BET, SEM and FTIR. The potential of TDAC to remove reactive brilliant blue from aqueous solutions was investigated under varying conditions of pH, adsorbent dosage, contact time, initial dye concentration, and temperature. Adsorption equilibrium, and kinetics were further studied. Adsorption was favored under acid conditions, and the process attained equilibrium in 30 min. The pseudo-second-order model could best describe the adsorption kinetics. The equilibrium data fitted well with the Langmuir and Freundlich models, and the maximum capacity was 555 mg g-1.