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681 results on '"Wang, Yingxu"'

656. Knowledge Reduction in Concept Lattices Based on Irreducible Elements

Author

Wang, Xia, Zhang, Wenxiu, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, and Chan, Keith C. C., editor

Published
2009
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657. Dyna: A Tool for Dynamic Knowledge Modeling

Author

Harrison, Robert, Chan, Christine W., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, and Chan, Keith C. C., editor

Published
2009
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658. Intelligent Processing of an Unrestricted Text in First Order String Calculus

Author

Gleibman, Andrew, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, and Chan, Keith C. C., editor

Published
2009
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659. Hybrid Evolutionary Algorithm for the Graph Coloring Register Allocation Problem for Embedded Systems

Author

Mahajan, Anjali, Ali, M. S., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, and Chan, Keith C. C., editor

Published
2009
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660. Knowledge Reduction of Covering Approximation Space

Author

Hu, Jun, Wang, GuoYin, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, and Chan, Keith C. C., editor

Published
2009
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661. Images as Symbols: An Associative Neurotransmitter-Field Model of the Brodmann Areas

Author

Greer, Douglas S., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, and Chan, Keith C. C., editor

Published
2009
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662. On Temporal Properties of Knowledge Base Inconsistency

Author

Zhang, Du, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, and Chan, Keith C. C., editor

Published
2009
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663. Extended Pawlak’s Flow Graphs and Information Theory

Author

Liu, Huawen, Sun, Jigui, Zhang, Huijie, Liu, Lei, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, and Chan, Keith C. C., editor

Published
2009
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664. Rough Sets and Functional Dependencies in Data: Foundations of Association Reducts

Author

Ślęzak, Dominik, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, and Chan, Keith C. C., editor

Published
2009
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665. Mereological Theories of Concepts in Granular Computing

Author

Polkowski, Lech, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, Yao, Yiyu, editor, and Wang, Guoyin, editor

Published
2008
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666. Attribute Set Dependence in Reduct Computation

Author

Terlecki, Pawel, Walczak, Krzysztof, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, Yao, Yiyu, editor, and Wang, Guoyin, editor

Published
2008
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667. A General Model for Transforming Vague Sets into Fuzzy Sets

Author

Liu, Yong, Wang, Guoyin, Feng, Lin, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, Yao, Yiyu, editor, and Wang, Guoyin, editor

Published
2008
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668. Quantifying Knowledge Base Inconsistency Via Fixpoint Semantics

Author

Zhang, Du, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, Yao, Yiyu, editor, and Wang, Guoyin, editor

Published
2008
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669. On Reduct Construction Algorithms

Author

Yao, Yiyu, Zhao, Yan, Wang, Jue, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, Yao, Yiyu, editor, and Wang, Guoyin, editor

Published
2008
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670. Rough Logic and Its Reasoning

Author

Liu, Qing, Liu, Lan, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, Yao, Yiyu, editor, and Wang, Guoyin, editor

Published
2008
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671. A Comparative Study of STOPA and RTPA

Author

Lopez, Natalia, Núñez, Manuel, Pelayo, Fernando L., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, Yao, Yiyu, editor, and Wang, Guoyin, editor

Published
2008
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672. Contingency Matrix Theory I: Rank and Statistical Independence in a Contigency Table

Author

Tsumoto, Shusaku, Hirano, Shoji, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, Yao, Yiyu, editor, and Wang, Guoyin, editor

Published
2008
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673. Applying Rough Sets to Information Tables Containing Possibilistic Values

Author

Nakata, Michinori, Sakai, Hiroshi, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Gavrilova, Marina L., editor, Tan, C. J. Kenneth, editor, Wang, Yingxu, editor, Yao, Yiyu, editor, and Wang, Guoyin, editor

Published
2008
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674. Uncertain Data Clustering in Distributed Peer-to-Peer Networks.

Author

Zhou, Jin, Chen, Long, Chen, C. L. Philip, Wang, Yingxu, and Li, Han-Xiong

Subjects
*DOCUMENT clustering, *DATA mining, *ALGORITHMS
Abstract

Uncertain data clustering has been recognized as an essential task in the research of data mining. Many centralized clustering algorithms are extended by defining new distance or similarity measurements to tackle this issue. With the fast development of network applications, these centralized methods show their limitations in conducting data clustering in a large dynamic distributed peer-to-peer network due to the privacy and security concerns or the technical constraints brought by distributive environments. In this paper, we propose a novel distributed uncertain data clustering algorithm, in which the centralized global clustering solution is approximated by performing distributed clustering. To shorten the execution time, the reduction technique is then applied to transform the proposed method into its deterministic form by replacing each uncertain data object with its expected centroid. Finally, the attribute-weight-entropy regularization technique enhances the proposed distributed clustering method to achieve better results in data clustering and extract the essential features for cluster identification. The experiments on both synthetic and real-world data have shown the efficiency and superiority of the presented algorithm. [ABSTRACT FROM AUTHOR]

Published
2018
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675. Jinzhi protects lipopolysaccharide-treated mice against mortality by repairing intestinal mucosal barrier damage and intestinal microecology.

Author

Xu, Jianfeng, Song, Junyao, Zhang, Yanming, Wang, Yingxu, Yang, Lei, Sha, Yinyin, Sun, Bowen, You, Na, Tian, Xinbao, Lin, Ruizhu, and Wu, Yongli

Subjects
*FECAL microbiota transplantation, *ENZYME-linked immunosorbent assay, *TREATMENT effectiveness, *TIGHT junctions, *EPITHELIAL cells, *INTESTINAL tumors
Abstract

Intestinal mucosal barrier damage is an important mechanism for the development of sepsis and multiple organ dysfunction syndrome. At present, there are no satisfactory and effective methods for the protection of the intestinal mucosal barrier. Jinzhi, the first fecal microbiota transplantation worldwide, is often used to treat critically ill patients; however, the specific mechanism involved in this process remains unclear. The aim of this study was to investigate the therapeutic effect and mechanism of Jinzhi intervention on mice with sepsis induced through treatment with lipopolysaccharide (LPS). Mice were intraperitoneally injected with LPS to simulate intestinal mucosal barrier function damage in sepsis; intervention was performed through the oral administration of Jinzhi. The effect of Jinzhi on LPS-induced sepsis was analyzed by comparing the vital signs and survival rate of mice under different treatments. Pathological staining and enzyme-linked immunosorbent assay were used to identify the effects of LPS or treatment with Jinzhi on the intestinal mucosal barrier in mice. The effect of LPS or treatment with Jinzhi on the intestinal flora was analyzed via 16S rRNA gene sequencing of ileal contents. Immunohistochemistry and enzyme-linked immunosorbent assay showed that treatment with LPS increased levels of inflammatory factors (interleukin-1α, interleukin-6, tumor necrosis factor-α), caspase-3, and caspase-8 in the serum and ileum, and destroyed the tight junction between epithelial cells. Intervention with Jinzhi reduced levels of serum LPS and tumor necrosis factor-α, and repaired the tight junction between epithelial cells. Furthermore, 16S rRNA gene sequencing analysis showed that treatment with Jinzhi improved the diversity and physiological function of the intestinal flora. These results suggest that Jinzhi may be a promising option for the treatment of sepsis caused by LPS, and emphasize that Jinzhi exerts a recovery effect on the imbalance of intestinal flora. [ABSTRACT FROM AUTHOR]

Published
2020
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676. IFKMHC: Implicit Fuzzy K-Means Model for High-Dimensional Data Clustering.

Author

Shi Z, Chen L, Ding W, Zhong X, Wu Z, Chen GY, Zhang C, Wang Y, and Chen CLP

Abstract

The graph-information-based fuzzy clustering has shown promising results in various datasets. However, its performance is hindered when dealing with high-dimensional data due to challenges related to redundant information and sensitivity to the similarity matrix design. To address these limitations, this article proposes an implicit fuzzy k-means (FKMs) model that enhances graph-based fuzzy clustering for high-dimensional data. Instead of explicitly designing a similarity matrix, our approach leverages the fuzzy partition result obtained from the implicit FKMs model to generate an effective similarity matrix. We employ a projection-based technique to handle redundant information, eliminating the need for specific feature extraction methods. By formulating the fuzzy clustering model solely based on the similarity matrix derived from the membership matrix, we mitigate issues, such as dependence on initial values and random fluctuations in clustering results. This innovative approach significantly improves the competitiveness of graph-enhanced fuzzy clustering for high-dimensional data. We present an efficient iterative optimization algorithm for our model and demonstrate its effectiveness through theoretical analysis and experimental comparisons with other state-of-the-art methods, showcasing its superior performance.

Published
2024
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677. On the philosophical, cognitive and mathematical foundations of symbiotic autonomous systems.

Author

Wang Y, Karray F, Kwong S, Plataniotis KN, Leung H, Hou M, Tunstel E, Rudas IJ, Trajkovic L, Kaynak O, Kacprzyk J, Zhou M, Smith MH, Chen P, and Patel S

Abstract

Symbiotic autonomous systems (SAS) are advanced intelligent and cognitive systems that exhibit autonomous collective intelligence enabled by coherent symbiosis of human-machine interactions in hybrid societies. Basic research in the emerging field of SAS has triggered advanced general-AI technologies that either function without human intervention or synergize humans and intelligent machines in coherent cognitive systems. This work presents a theoretical framework of SAS underpinned by the latest advances in intelligence, cognition, computer, and system sciences. SAS are characterized by the composition of autonomous and symbiotic systems that adopt bio-brain-social-inspired and heterogeneously synergized structures and autonomous behaviours. This paper explores the cognitive and mathematical foundations of SAS. The challenges to seamless human-machine interactions in a hybrid environment are addressed. SAS-based collective intelligence is explored in order to augment human capability by autonomous machine intelligence towards the next generation of general AI, cognitive computers, and trustworthy mission-critical intelligent systems. Emerging paradigms and engineering applications of SAS are elaborated via autonomous knowledge learning systems that symbiotically work between humans and cognitive robots. This article is part of the theme issue 'Towards symbiotic autonomous systems'.

Published
2021
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678. Human Body Mixed Motion Pattern Recognition Method Based on Multi-Source Feature Parameter Fusion.

Author

Song J, Zhu A, Tu Y, Wang Y, Arif MA, Shen H, Shen Z, Zhang X, and Cao G

Subjects
Accelerometry methods, Gait physiology, Humans, Movement physiology, Exoskeleton Device, Lower Extremity physiology, Neural Networks, Computer, Pattern Recognition, Automated methods
Abstract

Aiming at the requirement of rapid recognition of the wearer's gait stage in the process of intelligent hybrid control of an exoskeleton, this paper studies the human body mixed motion pattern recognition technology based on multi-source feature parameters. We obtain information on human lower extremity acceleration and plantar analyze the relationship between these parameters and gait cycle studying the motion state recognition method based on feature evaluation and neural network. Based on the actual requirements of exoskeleton per use, 15 common gait patterns were determined. Using this, the studies were carried out on the time domain, frequency domain, and energy feature extraction of multi-source lower extremity motion information. The distance-based feature screening method was used to extract the optimal features. Finally, based on the multi-layer BP (back propagation) neural network, a nonlinear mapping model between feature quantity and motion state was established. The experimental results showed that the recognition accuracy in single motion mode can reach up to 98.28%, while the recognition accuracy of the two groups of experiments in mixed motion mode was found to be 92.7% and 97.4%, respectively. The feasibility and effectiveness of the model were verified.

Published
2020
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679. Effect of stimulating acupoint Guanyuan (CV 4) on lower back pain by burning moxa heat for different time lengths: a randomized controlled clinical trial.

Author

Xu J, Lin R, Wu Y, Wang Y, Liu J, Zhang Y, Zhang Y, Xi C, and Wu Q

Subjects
Adult, Aged, Female, Humans, Low Back Pain, Male, Middle Aged, Time Factors, Treatment Outcome, Young Adult, Acupuncture Points, Moxibustion
Abstract

Objective: To investigate the effect of different heat-stimulating time lengths on lower back pain., Methods: Forty participants were randomly assigned to four groups of various heating time lengths. The short heating time length group (SL), moderate heating time length group (ML), and long heating time length group (LL) respectively received 15, 30, and 60 min of moxibustion therapy stimulating the acupoint Guanyuan (CV 4). The conventional acupuncture group (CA) received needle acupuncture treatment as a control group. The participants were treated continuously over a 2-week treatment period for a total of 10 sessions, with five sessions given per week. Participants were assessed weekly by blinded assessors,using the visual analogue scale (VAS) and Roland Morris Questionnaire (RMQ)., Results: The VAS and RMQ scores reduced in all four groups during treatment. There were significant differences in VAS scores (P < 0.01) and RMQ scores (P < 0.01) between before treatment and after 2 weeks of treatment in the LL group. After treatment, the LL group reported significantly lower VAS scores compared with the CA group, ML group, and SL group (P < 0.05)., Conclusion: The long and moderate lengths of heat-stimulating time of 30 and 60 min may be more effective for relieving lower back pain than that of short stimulating time lengths.

Published
2015
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680. Proximal half angle of the screw thread is a critical design variable affecting the pull-out strength of cancellous bone screws.

Author

Wang Y, Mori R, Ozoe N, Nakai T, and Uchio Y

Subjects
Animals, Equipment Failure Analysis, Friction, In Vitro Techniques, Male, Prosthesis Design, Swine, Tensile Strength, Bone Screws, Tibia physiology, Tibia surgery
Abstract

Background: Screws with strong pull-out strength have been sought for the treatment of cancellous bone. We hypothesized that an obliquely angled screw thread has advantages over conventional vertical thread with a minimal proximal half angle., Methods: Metal and bone screws were made of stainless steel and porcine cortical bone. Their proximal half angle was set at 0 degrees , 30 degrees , or 60 degrees . The screws were inserted into porcine cancellous bone. At 0 degrees , the thread faced the recipient bone vertically. Pullout tests at a rate of 30 mm/min (n=40, each screw type) and microcomputed tomography (n=6) were conducted., Findings: The pull-out strength of the screws was maximal at 30 degrees ; 348.8 (SD, 44.1)N with metal and 326.6 (39.4)N with bone. It was intermediate at 0 degrees ; 301.9 (35.9)N with metal and 278.2 (30.6)N with bone. It was minimal at 60 degrees; 126.5 (39.0)N with metal and 174.8 (29.7)N with bone. Cancellous bone was damaged between the threads at 30 degrees , while intact cancellous bone was preserved between the threads at 0 degrees., Interpretation: A proximal half angle of around 30 degrees is appropriate because the pullout force is applied to the recipient bone evenly. Commercial cancellous screws can be improved by changing the thread shape to minimize the damage to recipient bone.

Published
2009
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681. Contemporary cybernetics and its facets of cognitive informatics and computational intelligence.

Author

Wang Y, Kinsner W, and Zhang D

Subjects
Brain physiology, Humans, Intelligence physiology, Models, Neurological, Models, Theoretical, Nerve Net physiology, Neural Networks, Computer, Artificial Intelligence, Cybernetics, Informatics
Abstract

This paper explores the architecture, theoretical foundations, and paradigms of contemporary cybernetics from perspectives of cognitive informatics (CI) and computational intelligence. The modern domain and the hierarchical behavioral model of cybernetics are elaborated at the imperative, autonomic, and cognitive layers. The CI facet of cybernetics is presented, which explains how the brain may be mimicked in cybernetics via CI and neural informatics. The computational intelligence facet is described with a generic intelligence model of cybernetics. The compatibility between natural and cybernetic intelligence is analyzed. A coherent framework of contemporary cybernetics is presented toward the development of transdisciplinary theories and applications in cybernetics, CI, and computational intelligence.

Published
2009
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