Nonvolcanic tremor observed in the Mexican subduction zone

Nonvolcanic tremor (NVT) activity is revealed as episodes of higher spectral amplitude at 1–8 Hz in daily spectrograms from the continuous seismological records in Guerrero, Mexico. The analyzed data cover a period of 2001–2007 when in 2001–2002 a large slow slip event (SSE) had occurred in the Guerrero-Oaxaca region, and then a new large SSE occurred in 2006. The tremor burst is dominated by S-waves. More than 100 strong NVT bursts were recorded in the narrow band of ~40 × 150 km^2 to the south of Iguala City and parallel to the coastline. Depths of NVT hypocenters are mostly scattered in the continental crust between 5 and 40 km depth. Tremor activity is higher during the 2001–2002 and 2006 SSE compared with that for the “quiet” period of 2003–2005. While resistivity pattern in Guerrero does not correlate directly with the NVT distribution, gravity and magnetic anomaly modeling favors a hypothesis that the NVT is apparently related to the dehydration and serpentinization processes

Ariel - Volume 6 Number 3

Editors Mark Dembert J.D. Kanofsky Frank Chervenak John Lammie Curt Cummings Staff Ken Jaffe Bob Sklaroff Halley Faust Jim Burke Nancy Redfern Hans Weltin Photographer Larry Glazerman Overseas Editor Mike Sinason Humorist Jim McCan

The antecedents of union attitude formation : a study of preemployed individuals

v, 89 leaves ; 28 cm.Includes bibliographical references (leaves 85-88).The development of attitudes toward unions is a complex process involving several factors. Although union attitude formation has been explored from a work related context there has been little research on non-job related variables. The present study examined the influence of preemployment predictors of union attitudes from 310 university students who responded to questionnaires on union attitudes, work beliefs, parental influence and willingness to join a union. Regression analyses demonstrated that parents' union attitudes was the best predictor of students' union attitudes while Marxist Work Beliefs, Humanistic Work Beliefs and Work Ethic were moderate predictors. Although gender and sex did not moderate the relationship between parents' and students' union attitudes sex did differentiate responses to the willingness to join a union when pay equity was the objective for unionization. The General Union Attitude scale was tested for an inherent gender bias. These results demonstrated that one did not exist thus indicating that this scale was an accurate measure of women's and men's union attitudes

Reviewer Acknowledgments

We offer these reviewers our heartfelt thanks for a task that usually goes unrewarded in the academic environment. This year, we are especially grateful for those people listed below. They have assisted us in reaching the start of our 4th year, by guiding our decisions with your knowledge and capabilities

Optical Propagation and Communication

Contains research objectives and summary of research on four research projects.National Aeronautics and Space Administration (Grant NGR 22-009-013)U.S. Navy - Office of Naval Research (Contract N00014-76-C-0605)Joint Services Electronics Program (Contract DAAB07-76-C-1400)National Science Foundation (Grant ENG74-00131-AO2)U. S. Air Force - Electronic Systems Division (Contract F19628-76-C-0054)National Science Foundation (Grant ENG74-03996-A1

Optical Propagation and Communication

Contains research objectives and reports on two research projects.National Science Foundation (Grant ENG78-21603)U.S. Army Research Office - Durham (Contract DAAG29-80-C-0010)Joint Services Electronics Program (Contract DAAG29-78-C-0020

Processing and Transmission of Information

Contains research objectives and summary of research.U. S. Army Research Office - Durham (Contract DAHC04-69-C-0042)U. S. Army Research Office - Durham Contract DAHCO4-71 -C-0039)Joint Services Electronics Program (Contract DAAB07-71-C-0300)National Science Foundation (Grant GK-37582)National Aeronautics and Space Administration (Grant NGL 22-009-013

Factors determining renal response to water immersion in non-excretor cirrhotic patients

Factors determining renal response to water immersion in non-excretor cirrhotic patients. Non-excretor cirrhotic patients, defined by their inability to normally excrete a standard water load, display variable responses to head–out water immersion. The hemodynamic, hormonal, and renal functional status of fifteen such patients were analyzed relative to water excretion during head-out water immersion. Group 1 patients (N = 7) all excreted less than 40% of the water load during immersion, whereas excretion was greater than 40% in all eight patients in Group 2. Group 1 patients, when compared with Group 2, had more ascites, more diuretic resistance, lower serum sodium concentration (125 ± 2 vs. 130 ± 1 mEq/liter, P < 0.05), and more impaired baseline water excretion (12.9 ± 1.2 vs. 35.9 ± 5.9% of water load in 5 hr, P < 0.005). Systemic hemodynamic responses to water immersion were similar in both groups. Glomerular filtration rate and renal plasma flow were significantly more impaired in Group 1 patients (inulin clearance 28 ± 6 vs. 62 ± 9 ml/min/1.73m2, P < 0.05; para-aminohippurate clearance 212 ± 35 vs. 357 ± 37 ml/min, P < 0.05). Concentrations of plasma vasopressin (1.7 ± 0.5 vs. 0.8 ± 0.1 pg/ml, P < 0.05), renin (8.6 ± 1.7 vs. 3.8 ± 0.9 ng/ml/hr, P < 0.05), aldosterone (82 ± 14 vs. 39 ± 10 ng/dl, P < 0.05) and norepinephrine (1155 ± 183 vs. 603 ± 126 pg/ml, P < 0.05) were all significantly higher in Group 1 than Group 2 patients during water immersion. Thus, non-excretor cirrhotic patients are not homogenous and appear to comprise a spectrum with those patients in whom water excretion is most impaired, having tense ascites, diuretic resistance, lower serum sodium concentrations, more impaired renal function, and more marked abnormalities in the hormonal markers of decreased effective blood volume

Delivering health knowledge and wisdom from the hills and hollows of Appalachia

There is knowledge in the pages of Appalachia’s hills. This journal is positioned to find and publish those translations. It grows from a need to provide an outlet for scholarship about Appalachia’s health so that knowledge, and occasionally wisdom, is shared with those who care about and are committed to improving the region’s health