The point spread function of electrons in a magnetic field, and the decay of the free neutron

Experiments in nuclear and particle physics often use magnetic fields to guide charged reaction products to a detector. Due to their gyration in the guide field, the particles hit the detector within an area that can be considerably larger than the diameter of the source where the particles are produced. This blurring of the image of the particle source on the detector surface is described by a suitable point spread function (PSF), which is defined as the image of a point source. We derive simple analytical expressions for such magnetic PSFs, valid for any angular distribution of the emitted particles that can be developed in Legendre polynomials. We investigate this rather general problem in the context of neutron beta decay spectrometers and study the effect of limited detector size on measured neutron decay correlation parameters. To our surprise, insufficient detector size does not affect much the accuracy of such measurements, even for rather large radii of gyration. This finding can considerably simplify the layout of the respective spectrometers.Comment: 24 pages, 12 figure

Polarization of superfluid turbulence

We show that normal fluid eddies in turbulent helium II polarize the tangle of quantized vortex lines present in the flow, thus inducing superfluid vorticity patterns similar to the driving normal fluid eddies. We also show that the polarization is effective over the entire inertial range. The results help explain the surprising analogies between classical and superfluid turbulence which have been observed recently.Comment: 3 figure

The Face that Launched a Thousand Ships: Helen of Troy in the Poetry of Atwood and Tufts

This paper considers the transformation of Greek myth over time, how character’s attributes change over time, and ultimately how contemporary poets employ these myths. The myth of focus in the paper is that of Helen of Troy and the depiction of her character throughout the many years and variations of the myth. Her character is then considered in the contemporary feminist poetry of Carol Tufts and Margaret Atwood

Executive Information Systems Milestone Works: A Preliminary Investigation

Since David Nash (1977) first articulated the concept of an “executive information system (EIS)” in 1977, EIS has emerged as an important area in information systems. Similar to the work done studying transaction processing systems (TPS), decision support systems (DSS) and expert systems (ES), the study of EIS has progressed to the point where it is possible to pull back and take a broader look at the field. The purpose of this study is to examine the emergence and development of EIS

A Survey of Transdisciplinary Business Research Forums

The purpose of this study is to identify journal outlets which may be more favorable to publishing the research findings resulting from transdisciplinary research. Findings from this study can be used to: (1) help researchers target outlets for their research, (2) help researchers find transdisciplinary research upon which to base their own literature review, (3) help researchers identify other people who may be doing similar types of transdisciplinary research, and (4) help educators and practitioners identify research forums which are likely to present transdisciplinary findings which represent upcoming trends in business

The Taxi

This story is a suspenseful romantic drama that recounts the past and present events of the protagonist, Maria, as she faces the most difficult decision of her life

Lessons Learned from Migrating to an Online Electronic Business Management Course

This article describes the lessons learned while migrating an Electronic Business Management course from traditional face-toface delivery to online delivery across a six and a half year time frame. The course under review teaches students how to develop and construct a working information-based online business using free versions of online resources. Over 220 students completed this course as a traditional face-to-face class and over 300 students have completed this course as an online class. Student performance and satisfaction remained mostly consistent across delivery methods. Reflections include lessons learned and suggestions to aid in developing a course for online delivery. Course evaluations remained stable during the migration of the course to an online environment. The Electronic Business Management course migration was considered successful

Alfalfa Leafcutting Bee: Management for Alfalfa Pollination in South Dakota

The alfalfa leaf-cutter bee, Megachile rotundata (Fabricius), was introduced into South D a k o t a from Utah in 1962 for alfalfa pollination testing. This leaf-cutting bee, because of its pollen collecting activmes, has shown considerable promise as a means of increasing yields of alfalfa seed. A native of Eurasia, it was introduced into eastern United States in the mid-thirties and by 1958 had moved across the country into Oregon. There is some indication that the alfalfa leaf-cutter bee may have become established in isolated locations in South Dakota during this initial cross-country movement