Data mining: a tool for detecting cyclical disturbances in supply networks.

Disturbances in supply chains may be either exogenous or endogenous. The ability automatically to detect, diagnose, and distinguish between the causes of disturbances is of prime importance to decision makers in order to avoid uncertainty. The spectral principal component analysis (SPCA) technique has been utilized to distinguish between real and rogue disturbances in a steel supply network. The data set used was collected from four different business units in the network and consists of 43 variables; each is described by 72 data points. The present paper will utilize the same data set to test an alternative approach to SPCA in detecting the disturbances. The new approach employs statistical data pre-processing, clustering, and classification learning techniques to analyse the supply network data. In particular, the incremental k-means clustering and the RULES-6 classification rule-learning algorithms, developed by the present authors’ team, have been applied to identify important patterns in the data set. Results show that the proposed approach has the capability automatically to detect and characterize network-wide cyclical disturbances and generate hypotheses about their root cause

Bone and antler combs: towards a methodology for the understanding of trade and identity in Viking Age England and Scotland

This paper outlines the methodology of a doctoral research project at the University of York. The medium of study is the bone and antler hair comb, and the approach is one of integration. The project’s aims are twofold: to elucidate the means of distribution of these artefacts, and to develop our understanding of identity in Viking Age England and Scotland. The first phase of the project involves the review of methods of raw material analysis, whereby new and established identification criteria will be tested on a large sample of modern material. Should the results prove promising, the techniques will be employed in a study of combs from Viking Age contexts in northern England and Scotland. These zoologically-based methods will then be integrated with techniques taken from other areas of artefact analysis. Style and manufacture will be investigated through a variety of statistical and map-based techniques. These fine-grained analyses will develop our understanding of the way in which these objects were produced and exchanged. Building from these bases, a study of context and associations, together with a review of ethnohistoric evidence from the period, should help to elucidate the comb’s role in the construction of identity

Study of individual differences and ability grouping in the junior high school.

Thesis (M.A.)--Boston University This item was digitized by the Internet Archive

Revisiting the STEC Testing Approach: Using espK and espV to Make Enterohemorrhagic Escherichia coli (EHEC) Detection More Reliable in Beef

Current methods for screening Enterohemorrhagic Escherichia coli (EHEC) O157 and non-O157 in beef enrichments typically rely on the molecular detection of stx, eae, and serogroup-specific wzx or wzy gene fragments. As these genetic markers can also be found in some non-EHEC strains, a number of “false positive” results are obtained. Here, we explore the suitability of five novel molecular markers, espK, espV, ureD, Z2098, and CRISPRO26:H11 as candidates for a more accurate screening of EHEC strains of greater clinical significance in industrialized countries. Of the 1739 beef enrichments tested, 180 were positive for both stx and eae genes. Ninety (50%) of these tested negative for espK, espV, ureD, and Z2098, but 12 out of these negative samples were positive for the CRISPRO26:H11 gene marker specific for a newly emerging virulent EHEC O26:H11 French clone. We show that screening for stx, eae, espK, and espV, in association with the CRISPRO26:H11 marker is a better approach to narrow down the EHEC screening step in beef enrichments. The number of potentially positive samples was reduced by 48.88% by means of this alternative strategy compared to the European and American reference methods, thus substantially improving the discriminatory power of EHEC screening systems. This approach is in line with the EFSA (European Food Safety Authority) opinion on pathogenic STEC published in 2013

Revisiting the STEC Testing Approach: Using espK and espV to Make Enterohemorrhagic Escherichia coli (EHEC) Detection More Reliable in Beef

Current methods for screening Enterohemorrhagic Escherichia coli (EHEC) O157 and non-O157 in beef enrichments typically rely on the molecular detection of stx, eae, and serogroup-specific wzx or wzy gene fragments. As these genetic markers can also be found in some non-EHEC strains, a number of “false positive” results are obtained. Here, we explore the suitability of five novel molecular markers, espK, espV, ureD, Z2098, and CRISPRO26:H11 as candidates for a more accurate screening of EHEC strains of greater clinical significance in industrialized countries. Of the 1739 beef enrichments tested, 180 were positive for both stx and eae genes. Ninety (50%) of these tested negative for espK, espV, ureD, and Z2098, but 12 out of these negative samples were positive for the CRISPRO26:H11 gene marker specific for a newly emerging virulent EHEC O26:H11 French clone. We show that screening for stx, eae, espK, and espV, in association with the CRISPRO26:H11 marker is a better approach to narrow down the EHEC screening step in beef enrichments. The number of potentially positive samples was reduced by 48.88% by means of this alternative strategy compared to the European and American reference methods, thus substantially improving the discriminatory power of EHEC screening systems. This approach is in line with the EFSA (European Food Safety Authority) opinion on pathogenic STEC published in 2013

Selected Papers from Experimental Stress Analysis 2020

This Special Issue consists of selected papers from the Experimental Stress Analysis 2020 conference. Experimental Stress Analysis 2020 was organized with the support of the Czech Society for Mechanics, Expert Group of Experimental Mechanics, and was, for this particular year, held online in 19–22 October 2020. The objectives of the conference included identification of current situation, sharing professional experience and knowledge, discussing new theoretical and practical findings, and the establishment and strengthening of relationships between universities, companies, and scientists from the field of experimental mechanics in mechanical and civil engineering. The topics of the conference were focused on experimental research on materials and structures subjected to mechanical, thermal–mechanical, and dynamic loading, including damage, fatigue, and fracture analyses. The selected papers deal with top-level contemporary phenomena, such as modern durable materials, numerical modeling and simulations, and innovative non-destructive materials’ testing

Etika dan moral profesional dalam kalangan Pelajar Sarjana yang telah menjalani program latihan mengajar

Etika dan moral profesional merupakan salah satu elemen yang penting bagi meningkatkan sahsiah untuk kecemerlangan pelajar yang berilmu, berkualiti dan berbudi. Kajian ini bertujuan untuk mengenal pasti tahap etika dan moral profesional dalam kalangan pelajar Sarjana yang telah menjalani program latihan mengajar. Selain itu, kajian ini turut mengenal pasti perbezaan tahap etika dan moral profesional di antara demografi iaitu dari segi jantina dan pencapaian akademik pelajar. Kajian ini berbentuk tinjauan dengan menggunakan borang soal selidik sebagai instrumen kajian. Seramai 144 orang responden terlibat yang terdiri daripada pelajar Semester III program Sarjana PTV, UTHM yang mengikuti program latihan mengajar 2 sesi Julai 2012. Data dianalisis secara statistik deskriptif dan statistik inferensi dengan menggunakan perisian Statistical Packages for Social Science Version 16 (SPSS ver 16). Penganalisisan data secara statistik desktiptif adalah untuk mendapatkan kekerapan dan peratusan. Manakala bagi pengujian hipotesis pula, ujian Mann-Whitney U dan Ujian Kruskal Wallis digunakan. Hasil kajian menunjukkan tahap etika dan moral profesional dari aspek amalan profesional adalah baik (skor=38.19%), dari aspek menyelesaikan masalah berkaitan etika adalah pada tahap sederhana (skor= 42.36%) dan dari aspek sikap beretika adalah pada tahap lemah (skor=32.64%). Di samping itu, hasil kajian juga menyatakan tidak terdapat perbezaan yang signifikan tahap etika dan moral profesional antara pelajar lelaki dan pelajar perempuan dan tidak terdapat perbezaan yang signifikan tahap etika dan moral profesional pelajar yang berlainan pencapaian akademik. Berdasarkan dapatan kajian ini, beberapa cadangan telah dikemukan untuk meningkatkan lagi tahap etika dan moral profesional dalam kalangan guru pelatih