The Broadband Spectrum of Galaxy Clusters

We examine whether nonthermal protons energized during a cluster merger are simultaneously responsible for the Coma cluster's diffuse radio flux (via secondary decay) and the departure of its intra-cluster medium (ICM) from a thermal profile via Coulomb collisions between the quasithermal electrons and the hadrons. Rather than approximating the influence of nonthermal proton/thermal electron collisions as extremely rare events which cause an injection of nonthermal, power-law electrons (the `knock-on' approximation), we self-consistently solve (to our knowledge, for the first time) the covariant kinetic equations for the two populations. The electron population resulting from these collisions is out of equilibrium, yet not a power law, and importantly displays a higher bremsstrahlung radiative efficiency than a pure power law. Observations with GLAST will test this model directly.Comment: Accepted for publication in Ap

Laughter Louder Than Bombs: American Anti-Nuke Satire in the Cold War, 1946-59.

This study investigates US political cartoons during the 1940s and 1950s that critiqued “Cold War culture” by incorporating nuclear themes into their satire. The cartoonists analyzed in this study—Herbert Block of the Washington Post and the Village Voice’s Jules Feiffer—used “the bomb” as a framing device to explore contested issues related to the arms race, civil defense, and atmospheric testing. In doing so both Block and Feiffer forged a “visual vocabulary” that reimagined the sources of conflict between the Soviet Union and the US as a self-imposed struggle that informed Americans needed to confront in a critical matter. In this way both cartoonists re-appropriated the bomb’s projection as a cultural symbol of postwar American power, and refashioned its symbolic meaning to read as a threat to individual liberties in order to register their objections to US nuclear policy. The critiques embedded in their cartoons also furnished a sub-culture of humorous dissent that signalled to readers that satire remained an effective means of voicing opposition and venting frustrations during the Cold War era’s stultifying political climate

Legal representation at internal disciplinary enquiries: the CCMA and bargaining councils

The right to legal representation at internal disciplinary hearings and arbitration proceedings at the Commission for Conciliation, Mediation and Arbitration (CCMA), and bargaining councils, where the reason for dismissal relates to misconduct or incapacity is a topic that is raised continuously and often debated. Despite no amendments to labour legislation pertaining to the issue at hand there was however a recent Supreme Court of Appeal judgment. This judgment alters one’s view and clarifies the uncertainties that were created around Rule 25 of the CCMA rules, it also brings a different perspective to the matter, but it will however continue to ignite significant interest. There is no automatic right to legal representation at disciplinary hearings, at the CCMA, and at bargaining councils where disputes involve conduct or capacity and this is the very reason why it is a contentious matter for all parties to grapple with. The dismissal of an employee for misconduct may not be significant to the employer, but the employee’s job is his major asset, and losing his employment is a serious matter to contend with. Lawyers are said to make the process legalistic and expensive, and are blamed for causing delays in the proceedings due to their unavailability and the approach that they adopt. Allowing legal representation places individual employees and small businesses on the back foot because of the costs. Section 23(1) of the Constitution of the Republic of South Africa, Act 108 of 1996, provides everyone with the right to fair labour practices, and section 185 of the Labour Relations Act 66 of 1995 gives effect to this right and specifies, amongst others, that an employee has the right not to be unfairly dismissed. At internal disciplinary hearings, the Labour Relations Act 66 of 1995 is silent as to what the employee’s rights are with regards to legal representation and the general rule is that legal representation is not permitted, unless the employer’s disciplinary code and procedure or the employee’s contract allows for it, but usually an employee may only be represented by a fellow employee or trade union representative, but not by a legal representative. In MEC: Department of Finance, Economic Affairs and Tourism, Northern Province v Mahumani, the Supreme Court of Appeal held that there exists no right in terms of the common law to legal representation in tribunals other than in courts of law. However, both the common law and PAJA concede that in certain situations it may be unfair to deny a party legal representation. Currently the position in South Africa is that an employee facing disciplinary proceedings can put forward a request for legal representation and the chairperson of the disciplinary hearing will have the discretion to allow or refuse the request. In Hamata v Chairperson, Peninsula Technikon Internal Disciplinary Committee, the Supreme Court of Appeal found that the South African law does not recognise an absolute right to legal representation in fora other than courts of law, and a constitutional right to legal representation only arises in respect of criminal matters

Henry Hughes Interview 2017

This is a brief interview detailing Henry Hughes’s experiences as a Professor in the English department at Western Oregon University. In the interview, Professor Hughes answers questions regarding his time here at Western with the students and faculty

Changing behaviour: Increasing the effectiveness of workplace interventions in creating pro-environmental behaviour change

There is a great deal of research outlining interventions to increase pro-environmental behaviour, many of which are aimed at employees. However, to date the results for these have not lived up to their initial promise. Instead of offering another intervention, we propose a model which identifies psychological conditions under which these interventions are most likely to succeed. Through the integration of previously separate literatures from experimental social psychology, organisational psychology, organisational behaviour and environmental psychology, we suggest that the degree to which the intervention-related goal is efficacious and attractive, self-concordant, in conflict with other goals, and perceived to be completed will affect the level and type of behaviour change. Our model aims to provide actionable knowledge that extends our understanding of the effectiveness of workplace interventions designed to increase green organisational behaviour

Lipids modulate the conformational dynamics of a secondary multidrug transporter

Direct interactions with lipids have emerged as key determinants of the folding, structure and function of membrane proteins, but an understanding of how lipids modulate protein dynamics is still lacking. Here, we systematically explored the effects of lipids on the conformational dynamics of the proton-powered multidrug transporter LmrP from Lactococcus lactis, using the pattern of distances between spin-label pairs previously shown to report on alternating access of the protein. We uncovered, at the molecular level, how the lipid headgroups shape the conformational-energy landscape of the transporter. The model emerging from our data suggests a direct interaction between lipid headgroups and a conserved motif of charged residues that control the conformational equilibrium through an interplay of electrostatic interactions within the protein. Together, our data lay the foundation for a comprehensive model of secondary multidrug transport in lipid bilayers

Fun versus Practical: Physiological Responses and Preference of Exercise Equipment

The elliptical cross trainer has become a popular a mode of exercise, but can only be used indoors. The StreetStrider was designed as an outdoor elliptical-bike. PURPOSE: The purpose of this study is to determine whether the elliptical or the StreetStrider was more enjoyable, and to compare the physiological variables for energy expenditure, heart rate (HR), VO2, and Rate of Perceived Exertion (RPE). METHODS: Thirty participants (15 male, 15 female, mean age=22±2) from Cleveland State University exercised for 20 minutes at 75% of their age predicted maximal heart rate on the StreetStrider and elliptical. Energy expenditure was measured with a COSMED K4b metabolic system. Participants’ RPE was recorded every five minutes using the Borg Scale for Rate of Perceived Exertion. Data was analyzed using SPSS version 18. A paired sample t-test compared physiological responses. A one-way ANOVA analyzed gender differences. A significance level of .05 was used to determine significance. RESULTS: No significant differences were shown in energy expenditure (p=.930), HR (p=.098), or in average RPE (p=.529) between the exercise trials. A preference survey concluded that most subjects found the StreetStrider more enjoyable than the elliptical. CONCLUSION: The StreetStrider is more enjoyable than the elliptical and as effective in energy expenditure, and could serve as a substitute for the elliptical.https://engagedscholarship.csuohio.edu/u_poster_2014/1034/thumbnail.jp

Comparison of Electronic and Mechanical Handgrip Devices in Lowering Blood Pressure

Hypertension causes billions of deaths per year (Millar et al., 2013). The Zona PlusTM is an expensive tool designed to lower blood pressure (BP) using isometric exercise. This exercise may be achieved using a less expensive Handgrip Dynamometer. PURPOSE: The purpose of this research is to determine if the Zona or Handgrip Dynamometer is more efficient at lowering BP and most cost effective for patients. METHODS: Twenty subjects used the Zona and twenty subjects used the dynamometer three times per week for six weeks. BP was taken once per week prior to the treatment. A maximum voluntary contraction (MVC) was recorded for each hand before every treatment. Participants were required to hold the handgrip at 30% of their MVC for four two-minute contractions. A paired samples T test was used to analyze changes in participants’ BP. A one-way ANOVA was used to compare the BP changes between the Zona and the Handgrip. RESULTS: The results indicated no significant changes in participants’ pre- and post- treatment after training when using the Zona for either stolic (p=0.225) or diastolic BP (p=1.000). There was also no significant difference in participants’ post treatment systolic BP (p=0.199), however, the post treatment for diastolic increased significantly (p=0.027 BP between those that used the Zona PlusTM and Handgrip Dynamometer. CONCLUSION: Though the Dynamometer is more cost efficient, neither the Zona nor the Dynamometer resulted in lowered BP.https://engagedscholarship.csuohio.edu/u_poster_2014/1037/thumbnail.jp