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RISS 인기검색어
- 검색키워드
- 저자 : Yu-Ning Geng (검색결과 5 건)
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Research on Wormhole Attack Detection Algorithm in Space Information Networks
Yu Geng,Zhang jie,Zhang Yongfang,Ye ning,Ren Kaiya 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.5
Wormhole attack is a coordinated attack that launched by two or more malicious node. With a high quality private link malicious node, attracted traffic, attacked routing protocol, destroyed network topology, has a great threat to space information network. We propose a wormhole attack detection algorithm based on abnormal topology and time delay in space information network and the algorithm is mainly composed of two phases: finding abnormal topology and getting the malicious node. According to the number of nodes which are mutually non-one-hop neighbors in the normal network and the abnormal topology in backbone get the suspicious neighbors. To confirm the fake link, uses the round trip time to detect suspicious neighbors. Sends warning messages to isolate false neighbors or malicious nodes to ensure the security of the network. Using the network simulation software NS2 analyses the performance of the detection algorithm. The simulation results show that the proposed algorithm can detect wormhole also has high detection rate and a low false positive rate.
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Ghost Cell Odontogenic Carcinoma Arising from Calcifying Cystic Odontogenic Tumor: A Case Report
Zhi-Yu Zhu,Yu Chen,Zhi-Gang Chu,Wei-Ping Zhang,Di Lv,Ning Geng,Ming-Zhong Yang 대한병리학회 2012 Journal of Pathology and Translational Medicine Vol.46 No.5
Ghost cell odontogenic carcinoma (GCOC) is an exceptionally rare and malignant odontogenic tumor with aggressive growth characteristics. We describe a case of GCOC which was considerably derived from a previously resected calcifying cystic odontogenic tumor (CCOT). Cellular atypia, mitotic activity, Ki-67 labeling index and matrix metalloprotease-9 positive expression rate were all increased in the currently resected specimen compared to the initial one. This is a rare case of malignant transformation of CCOT to GCOC with respect to its histopathological and immunohistochemical findings.
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Hou, Wenpeng,Zhao, Ning-Jiu,Meng, Dongli,Tang, Jing,Zeng, Yi,Wu, Yu,Weng, Yangziwan,Cheng, Chungui,Xu, Xiulai,Li, Yi,Zhang, Jian-Ping,Huang, Yong,Bielawski, Christopher W.,Geng, Jianxin American Chemical Society 2016 ACS NANO Vol.10 No.5
<P>The installation of heterojunctions on the surfaces of carbon nanotubes (CNTs) is an effective method for promoting the charge separation processes needed for CNT-based electronics and optoelectronics applications. Conjugated polymers are proven state-of-the-art candidates for modifying the surfaces of CNTs. However, all previous attempts to incorporate conjugated polymers to CNTs resulted in unordered interfaces. Herein we show that well-defined chains of regioregular poly(3-hexylthiophene) (P3HT) were successfully grown from the surfaces of multiwalled CNTs (MWNTs) using surface-initiated Kumada catalyst-transfer polycondensation. The polymerization was found to proceed in a controlled manner as chains of tunable lengths were prepared through variation of the initial monomer-to-initiator ratio. Moreover, it was determined that large-diameter MWNTs afforded highly ordered P3HT aggregates, which exhibited a markedly bathochromically shifted optical absorption due to a high grafting density induced planarization of the polymer chains. Using ultrafast spectroscopy, the heterojunctions formed between the MWNTs and P3HT were shown to effectively overcome the binding energy of excitons, leading to photoinduced electron transfer from P3HT to MWNTs. Finally, when used as prototype devices, the individual MWNT-g-P3HT core-shell structures exhibited excellent photoresponses under a low illumination density.</P>
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Hongzhen Zhang,Ronghua Xu,Zuowen Yin,Jun Yu,Ning Liang,Geng Qian 한국고분자학회 2022 Macromolecular Research Vol.30 No.1
Wound treatment is an important issue and poses a critical challenge for healthcare systems. It is of great significance to develop materials for wound repair and regeneration. Herein, we presented a kind of novel drug-loaded methacryloyl chondroitin sulfate (CSMA) microspheres for promoting the wound healing process. The CSMA droplets were generated from microfluidic electrospray and polymerized with ultraviolet light. With further freeze-drying and drug uploading, the drugloaded CSMA microspheres were achieved. The prepared microspheres exhibited excellent biocompatibility, and the following animal experiments indicated they could promote wound healing significantly. This study opens the door to drug-loaded CSMA microspheres for wound healing applications.
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Yue He,Su-Bin Han,Yu-Ning Geng,Shu-Li Yang,Yu-Mei Wu 대한부인종양학회 2020 Journal of Gynecologic Oncology Vol.31 No.3
Objective: This study aimed to identify proteins related to paclitaxel and carboplatin chemoresistance in cervical cancer. Methods: Quantitative proteomic analysis was performed on normal SiHa cells and those treated with paclitaxel and carboplatin for 14 days, with isobaric tags for relative and absolute quantitation (iTRAQ) analysis. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses were used to identify related processes and differentially expressed proteins. Results: A total of 67 and 96 differentially expressed proteins were identified in the paclitaxel- and carboplatin- treated groups, respectively. GO and KEGG enrichment analyses identified 53 (43 upregulated and 10 downregulated) and 85 differentially expressed proteins (70 upregulated and 15 downregulated) in the paclitaxel- and carboplatin-treated groups, respectively. The cell counting kit-8 results revealed that APOA1 was overexpressed in both the paclitaxel- and carboplatin- resistant SiHa cells compared with the control cells. Immunohistochemistry showed that APOA1 was highly expressed in the paclitaxel- and carboplatin- resistant squamous cell carcinoma of the cervix. Conclusion: This study is the first to use iTRAQ to identify paclitaxel- and carboplatin- resistance proteins in cervical cells. We identified several proteins previously unassociated with paclitaxel and carboplatin resistance in cervical cancer, thereby expanding our understanding of paclitaxel and carboplatin resistance mechanisms. Moreover, these findings indicate that the APOA1 protein could serve as a potential marker for monitoring and predicting paclitaxel and carboplatin resistance levels.
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