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Dos detections based on association rules and frequent itemsets

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Journal of Harbin Institute of Technology(New series) 2008年第2期15卷 283-289页

作者： george s oreku Fredrick JMtenzi 李建中 Dept.of Computer science and Engineering Harbin Institute of Technology school of Computing Dublin Institute of Technology

To detect the Dos in networks by applying association rules mining techniques, we propose that association rules and frequent itemsets can be employed to find Dos pattern in packet streams which describe traffic and user behaviors. The method extracts information from the log analysis of submitted packets using the algorithm which depends on the definition of the intrusion. Large itemsets were extracted to represent the super facts to build the association analysis for the intrusion. Network data files were analysed for experiments. The analysis and experimental results are encouraging with better performance as packet frequency number increases.

关键词：自动控制技术资料数据采矿技术信息包

Quality of service in Wireless sensor Networks

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Wireless sensor Network 2014年第2期6卷 19-26页

作者： Joseph E. Mbowe george s. oreku Faculty of Economic science and Information Technology TIRDO/North West University Vanderbijlpark South Africa The Nelson Mandela African Institution of science and Technology School of Computational Science and Communication Engineering Arusha Tanzania

The growing demand of usage of wireless sensors applications in different aspects makes the quality-of-service (Qos) to be one of paramount issues in wireless sensors applications. Quality of service guarantee in wireless sensor networks (WsNs) is difficult and more challenging due to the fact that the resources available of sensors and the various applications running over these networks have different constraints in their nature and requirements. Traditionally quality of service was focused on network level with concern in metrics such as delay, throughput, jitter e.c.t. In this paper we present appropriate metrics of Qos for WsN which involve service, reliability and availability which ultimately facilitating in archiving qualitable service. We discuss the reverse look of Qos and hence present mathematically the three significant quality factors that should currently be taken into account in developing WsNs application quality services namely, availability, reliability and serviceability. We run experiments incorporating these three phenomenons (reliability, availability and serviceability—RAs) to demonstrate how to attain Qos which effectively improve reliability of the overall WsNs.

关键词： Wireless sensor Network Qos Probability Metrics serviceability

Flexible ultra-thin super-resolution endoscopy

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science China(Physics,Mechanics & Astronomy) 2024年第3期67卷 171-172页

作者： george s.D.Gordon Department of Electrical and Electronic Engineering University of NottinghamNottingham NG7 2RDUK

In recent years, multimode fiber(MMF) has become an important tool for high-resolution endoscopic imaging in narrow channels(e.g., in the brain via needles or inside blood vessels) due to its high mode density and fine diameter, typically stacle to widespread deployment in applications is that realistic perturbations, including bending, twisting and changes in temperature, cause unacceptable image degradation.

关键词： fiber resolution typically

A Conceptual Framework for Threat Assessment Based on Organization’s Information security Policy

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Journal of Information security 2014年第4期5卷 166-177页

作者： Joseph Elias Mbowe Irina Zlotnikova simon s. Msanjila george s. oreku school of Computational science and Communication Engineering The Nelson Mandela African Institution of Science and Technology Arusha Tanzania Faculty of science and Technology Mzumbe University Morogoro Tanzania Faculty of Economics North West University Vanderbijlpark South Africa

The security breaches of sensitive information have remained difficult to solve due to increased malware programs and unauthorized access to data stored in critical assets. As risk appetite differ from one organization to another, it prompts the threat analysis tools be integrated with organization’s information security policy so as to ensure security controls at local settings. However, it has been noted that the current tools for threat assessment processes have not encompassed information security policy for effective security management (i.e.?confidentiality, integrity and availability) based on organization’s risk appetite and culture. The information security policy serves as a tool to provide guidance on how to manage and secure all business operations including critical assets, infrastructure and people in the organization. This guidance (e.g. usage and controls) facilitates the provisions for threat assessment and compliance based on local context. The lack of effective threat assessment frameworks at local context have promoted the exposure of critical assets such as database servers, mails servers, web servers and user smart-devices at the hand of attackers and thus increase risks and probability to compromise the assets. In this paper we have proposed a conceptual framework for security threat assessment based on organization’s information security policy. Furthermore, the study proposed the policy automation canvas for provision of a methodology to alert the security managers what possible threats found in their organizations for quick security mitigation without depending on security expertise.

关键词： Critical Asset Information security Information security Policy Threat Analysis Threat Assessment security Threat Visualization

On Development of Platform for Organization security Threat Analytics and Management (POsTAM) Using Rule-Based Approach

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Journal of software Engineering and Applications 2016年第12期9卷 601-623页

作者： Joseph E. Mbowe simon s. Msanjila george s. oreku Khamisi Kalegele school of Computational and Communication science and Engineering The Nelson Mandela African Institution of Science and Technology Arusha Tanzania Faculty of science and Technology Mzumbe University Morogoro Tanzania Faculty of Economics North West University Vanderbijlpark South Africa

The integration of organisation’s information security policy into threat modeling enhances effectiveness of security strategies for information security management. These security policies are the ones which define the sets of security issues, controls and organisation’s commitment for seamless integration with knowledge based platforms in order to protect critical assets and data. such platforms are needed to evaluate and share violations which can create security loop-hole. The lack of rules-based approaches for discovering potential threats at organisation’s context, poses a challenge for many organisations in safeguarding their critical assets. To address the challenge, this paper introduces a Platform for Organisation security Threat Analytic and Management (POsTAM) using rule-based approach. The platform enhances strategies for combating information security threats and thus improves organisations’ commitment in protecting their critical assets. R scripting language for data visualization and java-based scripts were used to develop a prototype to run on web protocol. MysQL database management system was used as back-end for data storage during threat analytic processes.

关键词： security Threats Analytic Threat Visualization security Management Automated security Policies

Robotic-assisted retroperitoneal lymph node dissection for stage II testicular cancer

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Asian Journal of Urology 2024年第1期11卷 121-127页

作者： george McClintock Ahmed s.Goolam Don Perera Ryan Downey scott Leslie Peter Grimison Henry Woo Peter Ferguson Nariman Ahmadi Department of Urology Chris O'Brien LifehouseSydneyNSWAustralia Department of Anaesthesia Chris O'Brien LifehouseSydneyNSWAustralia The University of sydney SydneyNSW2006Australia Department of Medical Oncology Chris O'Brien LifehouseSydneyNSWAustralia

Objective:To evaluate the perioperative as well as early oncological outcomes of patients undergoing robotic retroperitoneal lymph node dissection for treatment of testicular ***:We conducted a prospective consecutive case series of patients undergoing robotic assisted retroperitoneal lymph node dissection for metastatic testicular cancer between May 2018 and July 2021 at our *** were collected on patient and tumour characteristics,intraoperative and postoperative parameters,and functional and oncological *** statistics are ***:Nineteen patients were identified;18(94.7%)completed the procedure robotically and one was converted to open surgery;78.9%of patients had stage≥IIB and 12(63.2%)patients had undergone prior *** median operative time was 300(interquartile range[IQR]240-315)*** blood loss was 100(IQR 50-175)*** length of stay was 2(range 1-11)*** robotically completed patients commenced diet and passed flatus on Day 1 and were discharged by Day *** median lymph node yield was 40.5(IQR 38-51)*** patients undergoing nerve-sparing procedures recovered antegrade ejaculatory *** patient had a Clavien-Dindo III complication(chylous ascites requiring drainage).At a median follow-up of 22.3(IQR 16.3-24.9)months,one patient developed retroperitoneal recurrence,which was successfully treated with second-line chemotherapy;no other patients have had ***:Robotic retroperitoneal lymph node dissection is a safe and feasible alternative to open surgery in appropriately selected patients,offering low *** oncological outcomes are *** cohorts and longer follow-ups are required to validate our institution's findings.

关键词： Retroperitoneal lymph node dissection Robotic surgery Testicular cancer Retroperitoneal node dissection

A Dimensional Reduction Approach Based on Essential Constraints in Linear Programming

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American Journal of Operations Research 2024年第1期14卷 1-31页

作者： Eirini I. Nikolopoulou george s. Androulakis Department of Mathematics University of Patras Patras Greece Department of Business Administration University of Patras Patras Greece

This paper presents a new dimension reduction strategy for medium and large-scale linear programming problems. The proposed method uses a subset of the original constraints and combines two algorithms: the weighted average and the cosine simplex algorithm. The first approach identifies binding constraints by using the weighted average of each constraint, whereas the second algorithm is based on the cosine similarity between the vector of the objective function and the constraints. These two approaches are complementary, and when used together, they locate the essential subset of initial constraints required for solving medium and large-scale linear programming problems. After reducing the dimension of the linear programming problem using the subset of the essential constraints, the solution method can be chosen from any suitable method for linear programming. The proposed approach was applied to a set of well-known benchmarks as well as more than 2000 random medium and large-scale linear programming problems. The results are promising, indicating that the new approach contributes to the reduction of both the size of the problems and the total number of iterations required. A tree-based classification model also confirmed the need for combining the two approaches. A detailed numerical example, the general numerical results, and the statistical analysis for the decision tree procedure are presented.

关键词： Linear Programming Binding Constraints Dimension Reduction Cosine similarity Decision Analysis Decision Trees

Probiotics: shaping the gut immunological responses

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World Journal of Gastroenterology 2024年第15期30卷 2096-2108页

作者： Eirini Filidou Leonidas Kandilogiannakis Anne shrewsbury george Kolios Katerina Kotzampassi Faculty of Medicine Laboratory of PharmacologyDemocritus University of ThraceAlexandroupolis 68100Greece Department of surgery Aristotle University of ThessalonikiThessaloniki 54636Greece

Probiotics are live microorganisms exerting beneficial effects on the host’s health when administered in adequate *** the most popular and adequately studied probiotics are bacteria from the families Lactobacillaceae,Bifidobacteriaceae and *** of them have been shown,both in vitro and in vivo studies of intestinal inflammation models,to provide favorable results by means of improving the gut microbiota composition,promoting the wound healing process and shaping the immunological *** intestinal conditions,such as inflammatory bowel diseases(IBD),are characterized by an imbalance in microbiota composition,with decreased diversity,and by relapsing and persisting inflammation,which may lead to mucosal *** the results of the clinical studies investigating the effect of probiotics on patients with IBD are still controversial,it is without doubt that these microorganisms and their metabolites,now named postbiotics,have a positive influence on both the host’s microbiota and the immune system,and ultimately alter the topical tissue *** influence is achieved through three axes:(1)By dis-placement of potential pathogens via competitive exclusion;(2)by offering protection to the host through the secretion of various defensive mediators;and(3)by supplying the host with essential *** will analyze and discuss almost all the in vitro and in vivo studies of the past 2 years dealing with the possible favorable effects of certain probiotic genus on gut immunological responses,highlighting which species are the most beneficial against intestinal inflammation.

关键词： Probiotics Lactobacillaceae Bifidobacteriaceae saccharomyces Intestinal inflammation Immune responses

Accuracy and precision of dried urine spot method for the detection of schistosoma mansoni circulating cathodic antigens in resource-limited settings

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Infectious Diseases of Poverty 2024年第1期13卷 103-104页

作者： Abdallah Zacharia Clemence Kinabo Twilumba Makene Huda Omary george Ogweno Faraja Lyamuya Billy Ngasala Muhimbili University of Health and Allied sciences Dar es Salaam Tanzania National Institute for Medical Research Mwanza Tanzania Neglected Tropical Diseases Control Program Ministry of Health Dodoma Tanzania

Background The World Health Organization recommends the use of schisto point-of-care circulating cathodic anti-gens(schisto POC-CCA)for screening of schistosoma mansoni as it offers better sensitivity than ***,there are limitation facing the use of this method including timely availability of the test *** aim of this study was to determine the reliability of dried urine spot(DUs)method for collection of urine and detection of *** using schisto POC-CCA cassettes in a resource-limited *** A cross-sectional study was conducted between October and November 2022 among 250 primary school children in sengerema District,northwestern *** CCA was detected in filter paper-based DUss,liquid urine using DUs schisto POC-CCA(index),and direct urine schisto POC-CCA(comparator)methods *** eggs in stool were detected using duplicate Kato-Katz(KK)*** measures of accuracy were com-puted and compared between the index and comparator *** strength of agreement between inter-raters precisions was tested using Cohen's kappa(k).Results This study revealed *** prevalence rates of 28.8%,54.0%and 50.8%by duplicate KK,direct urine schisto POC-CCA and DUs schisto POC-CCA methods *** mean intensity of infection among infected participants Was 86.3 eggs per gram of stool(EPG)ranging from 12.0 EPG to 824.0 *** sensitivity of DUs schisto POC-CCA and direct urine schisto POC-CCA Was 94.44%(95%CI:89.15-99.74%)and 97.22%(95%CI:93.43-100.00%)*** DUs schisto POC-CCA method had slightly higher specificity(66.85%)than direct urine schisto POC-CCA method(63.48%).The accuracy of the DUs schisto POC-CCA Was found to be slightly high(74.80%,95%CI:68.94-79.06%)compared to that of direct urine schisto POC-CCA(73.20%,95%CI:67.25-78.59%).There was good agreement between two laboratory technologists who performed the DUs schisto POC-CCA method on similar samples(k=0.80,95%CI:0.59-0.95).Con

关键词： Accuracy Point-of-care circulating cathodic antigen Dried urine spot schistosoma mansoni sensiti specificity