No abstract

No abstract

No abstract

The main function of IDS (Intrusion Detection System) is to protect the system, analyze and predict the behaviors of users. Then these behaviors will be considered an attack or a normal behavior. Though IDS has been developed for many years, the large number of return alert messages makes managers maintain system inefficiently. In this paper, we use RST (Rough Set Theory) and SVM (Support Vector Machine) to detect intrusions. First, RST is used to preprocess the data and reduce the dimensions. Next, the features were selected by RST will be sent to SVM model to learn and test respectively. The method is effective to decrease the space density of data. The experiments will compare the results with different methods and show RST and SVM schema could improve the false positive rate and accuracy. His research interests include web technology, pattern recognition, and applied soft computing and network security. Kai-FanCheng received the University degree from the department of Information Management of the Overseas Chinese College of Commerce, Taichung, Taiwan, in 2007. He is a Graduate student from the department of Information Management at Chaoyang University of Technology, Taichung, Taiwan. His research interests include the security issue (intrusion detection in particular) of ad hoc networks and wired networks. Chia-Fen Hsieh received the Graduate degree from department of Information Management at Chaoyang University of Technology in 2008. He is a candidate for doctor's degree from graduate institute of informatics at Chaoyang University of Technology, Taichung, Taiwan. His research interests include the security issue (intrusion detection in particular) of wireless sensor networks, ad hoc networks and wired networks.

No abstract

Abstract:In recent years, increasing concerns regarding the energy costs and environmental effects of urban motorcycle use have spurred the development of hydrogen-electric motorcycles in Taiwan. Although gasoline-powered motorcycles produce substantial amounts of exhaust and noise pollution, hydrogen-electric motorcycles are highly energy-efficient, relatively quiet, and produce zero emissions, features that suggest their great potential to reduce the problems currently associated with the use of motorcycles in city environments. This study identified the significant external variables that affect consumers' purchase intentions toward using hydrogen-electric motorcycles. A questionnaire method was employed with a total of 300 questionnaires distributed and 233 usable questionnaires returned, yielding a 78% overall response rate. Structural equation modeling (SEM) was applied to test the research hypothesis. The research concluded that (1) product knowledge positively influenced purchase intentions but negatively affected the perceived risk; (2) perceived quality via hydrogen-electric motorcycles positively influenced the perceived value but negatively affected the perceived risk; (3) perceived risk negatively affected the perceived value; and (4) the perceived value positively affected purchase intentions. This study can be used as a reference for motorcycle manufacturers when planning their marketing strategies.

Archived formalin-fixed, paraffin-embedded tissues from 28 diseased ornamental cichlid fish associated with visceral granulomas were examined by polymerase chain reaction (PCR) and in situ hybridization (ISH) for detection of Francisella-like bacteria (FLB). The 16S rDNA FLB-specific primer pair 180f/465r was used on naturally infected ornamental cichlids, resulting in 11 positive cases (39%). Using DNA probes, all 28 cases (100%) showed a positive reaction, and most labeled cells were observed in the visceral granulomas of infected individuals. FLB was detected in cells morphologically resembling epithelioid and endothelioid macrophages. ISH was more sensitive than PCR or routine histopathological examination, based on the examination of archived formalin-fixed, paraffin-embedded tissues in this study. Furthermore, this technique located a new fish pathogen, FLB, in ornamental cichlids. The causative agent was similar to the pathogen inducing systemic granulomas in tilapia. KEY WORDS: Francisella-like bacterium · FLB · PCR · In situ hybridization · Cichlid · Ornamental fish Resale or republication not permitted without written consent of the publisherDis Aquat Org 75: [29][30][31][32][33][34][35][36] 2007 Disease Diagnostic Center [STAADDC] and collected between 1998 and 2002) of ornamental fish with visceral granulomas for investigation of the causative agent. A DIG-labeled DNA probe specific for a novel FLB partial 16S rRNA gene (base pairs 180 to 485) was developed for localization of the agent in the infected tissues of ornamental fish. This is the first report concerning granulomatous disease in ornamental fish due to infection with FLB, and comparing the sensitivities of ISH, PCR and histopathological assays. MATERIALS AND METHODSSampling. Twenty-eight diseased cichlid ornamental fish, consisting of 11 species: firebird Aulonocara rubescens, elegans Pseudotropheus elegans, zebra Pseudotropheus zebra, Rhodes's chilo Chilotilapia rhoadesii, Malawi eyebiter Dimidiochromis compressiceps, brown discus Symphysodon aequifasciatus, deep-water hap Haplochromis electra, electric blue hap Sciaenochromis fryeri, blue-white labido Labidochromis caeruleus, Placidochromis milomo and Frontosa cichlid Cyphotilapia frontosa were used as samples for study by PCR and ISH (Table 1). The disease had been tentatively diagnosed as FLB infection by cytological and histopathological examinations. Samples from 3 FLBfree firebird A. rubescens, as diagnosed by PCR and ISH, were selected as negative controls.Tissue processing. Brain, eye, gill arch, kidney, spleen, liver, heart and gastrointestinal (GI) tract were removed and cut into small pieces of ~5 mm 3 , and placed into neutral buffered formalin solution (20:1 [v/v] ratio of fixative to tissue) for 16 h. The fixed samples were dehydrated through an alcohol series and embedded in paraffin according to standard laboratory procedures. Serial sections 4 µm thick were cut, floated on the surface of a water-bath and mounted on positively charged slides (Muto Pure Chemic...

No abstract