Global relationships between volcanic vents and fractures radial to large impact basins on Mars

The relation of volcanic vents on Mars to impact basins has been previously studied. It has been asserted that the concentric fractures around impact basins extend into the crust and might localize some features, including volcanoes. Herein, the possibility is assessed of radial fractures inferred to be associated with impact basins as an additional control on the location of volcanoes on Mars. Geologic mapping at 1:2 million scale enabled 250 central vents and fissure vents to be identified. Pattern of vent distribution superimposed on a globe show that most are located on three distinct circles. In addition, there are two more possible great circles which may be superimposed onto the Martian globe. These five Martian circles are briefly examined for their geological relationship to volcanoes

The effect of a two-fluid atmosphere on relativistic stars

We model the physical behaviour at the surface of a relativistic radiating star in the strong gravity limit. The spacetime in the interior is taken to be spherically symmetrical and shear-free. The heat conduction in the interior of the star is governed by the geodesic motion of fluid particles and a nonvanishing radially directed heat flux. The local atmosphere in the exterior region is a two-component system consisting of standard pressureless (null) radiation and an additional null fluid with nonzero pressure and constant energy density. We analyse the generalised junction condition for the matter and gravitational variables on the stellar surface and generate an exact solution. We investigate the effect of the exterior energy density on the temporal evolution of the radiating fluid pressure, luminosty, gravitational redshift and mass flow at the boundary of the star. The influence of the density on the rate of gravitational collapse is also probed and the strong, dominant and weak energy conditions are also tested. We show that the presence of the additional null fluid has a significant effect on the dynamical evolution of the star.Comment: 31 pages, Minor corrections implemente

Neuregulin 1-Beta cytoprotective role in AML 12 mouse hepatocytes exposed to pentachlorophenol.

Neuregulins are a family of growth factor domain proteins that are structurally related to the epidermal growth factor. Accumulating evidence has shown that neuregulins have cyto- and neuroprotective properties in various cell types. In particular, the neuregulin-1 Beta (NRG1-Beta) isoform is well documented for its antiinflammatory properties in rat brain after acute stroke episodes. Pentachlorophenol (PCP) is an organochlorine compound that has been widely used as a biocide in several industrial, agricultural, and domestic applications. Previous investigations from our laboratory have demonstrated that PCP exerts both cytotoxic and mitogenic effects in human liver carcinoma (HepG2) cells, primary catfish hepatocytes and AML 12 mouse hepatocytes. We have also shown that in HepG2 cells, PCP has the ability to induce stress genes that may play a role in the molecular events leading to toxicity and tumorigenesis. In the present study, we hypothesize that NRG1-Beta will exert its cytoprotective effects in PCP-treated AML 12 mouse hepatocytes by its ability to suppress the toxic effects of PCP. To test this hypothesis, we performed the MTT-cell respiration assay to assess cell viability, and Western-blot analysis to assess stress-related proteins as a consequence of PCP exposure. Data obtained from 48 h-viability studies demonstrated a biphasic response; showing a dose-dependent increase in cell viability within the range of 0 to 3.87 microg/mL, and a gradual decrease within the concentration range of 7.75 to 31.0 microg/mL in concomitant treatments of NRG1-Beta+PCP and PCP. Cell viability percentages indicated that NRG1-Beta+PCPtreated cells were not significantly impaired, while PCP-treated cells were appreciably affected; suggesting that NRG1-Beta has the ability to suppress the toxic effects of PCP. Western Blot analysis demonstrated the potential of PCP to induce oxidative stress and inflammatory response (c-fos), growth arrest and DNA damage (GADD153), proteotoxic effects (HSP70), cell cycle arrest as consequence of DNA damage (p53), mitogenic response (cyclin- D1), and apoptosis (caspase-3). NRG1-Beta exposure attenuated stress-related protein expression in PCP-treated AML 12 mouse hepatocytes. Here we provide clear evidence that NRG1-Beta exerts cytoprotective effects in AML 12 mouse hepatocytes exposed to PCP

Free Zone Scientology: The Social Structure of a Contemporary Reform Movement

In lieu of an abstract, a short excerpt is provided: The Church of Scientology has a notorious history of controversy. The sources of this controversy stem from both the legal realm (most notably in the acquisition of the legal label of “religion” and, therefore, tax exempt status) and the social sphere, with critics from both the Christian and secular “anti-cult” movements publishing polemics against the Church. There also, however, exists a third source of criticism: self-identified Scientologists who have chosen to leave the official institution of Scientology. These understudied groups, practicing outside of the Church, are known as Free Zone Scientologists, or alternatively as Independent Scientologists. United by a belief in the discoveries of their founder, L. Ron Hubbard, these groups simultaneously hold the conviction that the institution he founded in 1952 has since misused and corrupted his teachings. While scholarly research on the Church of Scientology lags far behind that of other new religious movements, academic investigations of reform groups working against the Church are virtually non-existent. Because of this lacuna, as well as the cultural impact of Hubbard’s legacy, such groups deserve sustained attention as a legitimate piece of Scientology’s unfolding history

Increasing the Longevity of Tungsten Filaments in a Zone Refiner

Zone refining is used for its ability to purify material and grow single crystals. To produce these single crystals, a suspended molten zone, generated by electron bombardment, passes along the polycrystalline stock. During a zone refining run, the filaments that produce the electron bombardment can fail. In this project, the longevity of tungsten filaments in a zone refiner was investigated. A new bombardment geometry was constructed to attempt to increase the longevity of the filaments. The new geometry had a shield machined into it to prevent line-of-sight impurities originating in the molten zone from striking the filaments. It was found that the new geometry did not significantly increase the lifespan of the filaments. The longevity of the tungsten filaments was longer in a zone refiner that had a pillbox with larger dimensions. It is thought that the increased pillbox size allows for a reduction in the density of impurities, thus limiting the amount striking the filament

Restoring Faith in the Attorney/Client Relationship: Alaska\u27s Mandatory Fee Arbitration - A. Fred Miller, Attorneys at Law, P.C. v. Purvis

Arbitration is an effective method of alternative dispute resolution (ADR) in resolving a disagreement between an attorney and client over legal fees. The arbitration proceeding offers benefits for both lawyers and clients. Attorneys avoid having to sue a former client for a delinquent bill and face the very real possibility of a malpractice counterclaim. The client, on the other hand, avoids the aggravation of retaining another counsel to defend the suit. Mandatory fee arbitration, as established by the Alaska Supreme Court, places the decision to submit to arbitration squarely in the client\u27s hands. Once the client chooses arbitration, the attorney is obligated to proceed and the client gives up the right to sue in court. Arbitration is expedient, preserves client confidentiality, and offers an impartial forum including attorney as well as lay members. Attorneys have challenged the compulsory nature of mandatory fee arbitration on such constitutional grounds as denial of due process. This article argues that the advantages of mandatory fee arbitration significantly outweigh its disadvantages, and that it should be more widely adopted by state supreme courts or legislatures as one way in which to bolster public perception of the legal profession

Stratigraphy and Field Analysis of Glacial Deposits Near Worcester, Massachusetts

Guidebook for field trips to the Boston area and vicinity : 68th annual meeting, New England Intercollegiate Geological Conference, October 8-10, 1976: Trip F-5; B-

A Delphi Study Assessing Long-term Access to Electronic Medical Records (EMR)

This research effort addressed the issue of long-term access to electronic medical records as technological generations become obsolete, thereby preventing the access to patient health information. Using the Delphi methodology, experts with experience in electronic medical records and applicable systems provided insight based on their years of hands-on experience managing and/or using records and these systems. The end result of this research was a collection of ideas that medical institutions and medical informaticians must consider to ensure that patients and hospitals do not lose long-term access to electronic medical records as electronic medical records and technology continually evolves. Results of the study identified the need for more research in this particular area as no definitive solution to long-term access to electronic medical records was revealed. Additionally, the research findings highlighted the fact that a few medical institutions may actually be concerned about long-term access to electronic records