Are Recent Peculiar Velocity Surveys Consistent?

We compare the bulk flow of the SMAC sample to the predictions of popular cosmological models and to other recent large-scale peculiar velocity surveys. Both analyses account for aliasing of small-scale power due to the sparse and non-uniform sampling of the surveys. We conclude that the SMAC bulk flow is in marginal conflict with flat COBE-normalized Lambda-CDM models which fit the cluster abundance constraint. However, power spectra which are steeper shortward of the peak are consistent with all of the above constraints. When recent large-scale peculiar velocity surveys are compared, we conclude that all measured bulk flows (with the possible exception of that of Lauer & Postman) are consistent with each other given the errors, provided the latter allow for `cosmic covariance'. A rough estimate of the mean bulk flow of all surveys (except Lauer & Postman) is ~400 km/s towards l=270, b=0.Comment: 8 pages, 3 figures. To appear in Proceedings of the Cosmic Flows Workshop, Victoria, B. C., Canada, July 1999, eds. S. Courteau, M. Strauss, and J. Willic

Combined experimental and computational investigations of rhodium-catalysed C-H functionalisation of pyrazoles with alkenes

Detailed experimental and computational studies have been carried out on the oxidative coupling of the alkenes C(2)H(3)Y (Y=CO(2)Me (a), Ph (b), C(O)Me (c)) with 3-aryl-5-R-pyrazoles (R=Me (1 a), Ph (1 b), CF(3) (1 c)) using a [Rh(MeCN)(3)Cp*][PF(6)](2)/Cu(OAc)(2)⋅H(2)O catalyst system. In the reaction of methyl acrylate with 1 a, up to five products (2 aa–6 aa) were formed, including the trans monovinyl product, either complexed within a novel Cu(I) dimer (2 aa) or as the free species (3 aa), and a divinyl species (6 aa); both 3 aa and 6 aa underwent cyclisation by an aza-Michael reaction to give fused heterocycles 4 aa and 5 aa, respectively. With styrene, only trans mono- and divinylation products were observed, whereas with methyl vinyl ketone, a stronger Michael acceptor, only cyclised oxidative coupling products were formed. Density functional theory calculations were performed to characterise the different migratory insertion and β-H transfer steps implicated in the reactions of 1 a with methyl acrylate and styrene. The calculations showed a clear kinetic preference for 2,1-insertion and the formation of trans vinyl products, consistent with the experimental results

Yersinia ruckeri isolates recovered from diseased Atlantic Salmon (Salmo salar) in Scotland are more diverse than those from Rainbow Trout (Oncorhynchus mykiss) and represent distinct subpopulations

Yersinia ruckeri is the etiological agent of enteric redmouth (ERM) disease of farmed salmonids. Enteric redmouth disease is traditionally associated with rainbow trout (Oncorhynchus mykiss, Walbaum), but its incidence in Atlantic salmon (Salmo salar) is increasing. Yersinia ruckeri isolates recovered from diseased Atlantic salmon have been poorly characterized, and very little is known about the relationship of the isolates associated with these two species. Phenotypic approaches were used to characterize 109 Y. ruckeri isolates recovered over a 14-year period from infected Atlantic salmon in Scotland; 26 isolates from infected rainbow trout were also characterized. Biotyping, serotyping, and comparison of outer membrane protein profiles identified 19 Y. ruckeri clones associated with Atlantic salmon but only five associated with rainbow trout; none of the Atlantic salmon clones occurred in rainbow trout and vice versa. These findings suggest that distinct subpopulations of Y. ruckeri are associated with each species. A new O serotype (designated O8) was identified in 56 biotype 1 Atlantic salmon isolates and was the most common serotype identified from 2006 to 2011 and in 2014, suggesting an increased prevalence during the time period sampled. Rainbow trout isolates were represented almost exclusively by the same biotype 2, serotype O1 clone that has been responsible for the majority of ERM outbreaks in this species within the United Kingdom since the 1980s. However, the identification of two biotype 2, serotype O8 isolates in rainbow trout suggests that vaccines containing serotypes O1 and O8 should be evaluated in both rainbow trout and Atlantic salmon for application in Scotland

The Impact Of Business Faculty Attire On Student Perceptions And Engagement

Certainly not a new phenomenon, professors continue to strive to discover the magic elixir that will cause all students to become active participants in the learning process. It seems logical that if students find a topic interesting or pertinent to their career objectives, they will tend to take a more active role in a course. Perhaps as reasonable to assume, if instructors are engaging and have the respect of the class, students will naturally put forth more effort to master the material.  Prior studies have also shown that certain pedagogical devices and innovations, such as the usage of presentation technology, can positively impact student motivation. This study explored whether something as basic as the professor’s attire could also have a motivating effect on student perceptions and behavior in a college classroom setting. This paper summarizes the results of a survey pertaining to faculty dress that was administered to students enrolled in selected business courses at a mid-sized Midwestern university. Students were asked their opinion of whether the professional or unprofessional dress of the instructor would conceivably impact their own learning and effort. The survey results show that, in general, students perceive professional dress positively, and adjust their behavior accordingly

The Impact Of Instructor Attire On Student Perceptions Of Faculty Credibility And Their Own Resultant Behavior

Prior studies suggest that faculty members who are credible are more effective in the classroom in that they are evaluated more highly and their students achieve greater learning. This paper explores how the instructor’s attire impacts his or her perceived credibility, and how the students’ corresponding perception of instructor credibility impacts the students’ self-described behavior.  Questionnaires depicting instructors of both genders each wearing three different outfits, including casual, business casual and professional attire, are used to assess business student opinions regarding the academician’s credibility and the students’ resultant effort and learning.  The results indicate that faculty members can take comfort in that  their level of preparation, knowledge and ability to prepare students for a career do impact their credibility in the eyes of the students, no matter their choice of attire.  Instructor credibility, in turn, was found to have a significant positive relationship with all ten student effort and behavior variables that were examined.  In particular, credibility had the most impact on the student’s preparation for each class, attentiveness, appreciation for instructor effort, and respect for the instructor.  Positive significant relationships were also found between credibility and student evaluations of both the class and the instructor.&nbsp

Evaluating corporate performance:a critique of economic value added

There has been a revival of interest in economic techniques to measure the value of a firm through the use of economic value added as a technique for measuring such value to shareholders. This technique, based upon the concept of economic value equating to total value, is founded upon the assumptions of classical liberal economic theory. Such techniques have been subject to criticism both from the point of view of the level of adjustment to published accounts needed to make the technique work and from the point of view of the validity of such techniques in actually measuring value in a meaningful context. This paper critiques economic value added techniques as a means of calculating changes in shareholder value, contrasting such techniques with more traditional techniques of measuring value added. It uses the company Severn Trent plc as an actual example in order to evaluate and contrast the techniques in action. The paper demonstrates discrepancies between the calculated results from using economic value added analysis and those reported using conventional accounting measures. It considers the merits of the respective techniques in explaining shareholder and managerial behaviour and the problems with using such techniques in considering the wider stakeholder concept of value. It concludes that this economic value added technique has merits when compared with traditional accounting measures of performance but that it does not provide the universal panacea claimed by its proponents

Multimedia resources for teaching chemistry

A series of short, focused multimedia resources was developed based on areas of the chemistry degree course with which students often have difficulty. The resources were generated by undergraduate project students using Microsoft PowerPoint and Adobe Connect. Incorporation of animations and other interactive elements was found to be difficult. Evaluation of student attitudes towards the resources revealed that they were appreciated by students and were particularly useful for distance learners and for examination revision. A number of improvements were suggested such as the inclusion of more in-depth content. The development of these types of resources can be carried out by final year undergraduate project students