Publications by Shumard and McChesney concerning crinoids and other fossils

4 p.http://paleo.ku.edu/contributions.htm

Practicum Teachers’ Perceptions of Success in Relation to Self-Efficacy (Perceived Competence)

How do student teachers gain confidence in their teaching abilities as part of their school-based practicum experience while increasing their self-efficacy from the successes of their practicum? To understand this question better, we explored preservice teachers’ post-practicum accounts of experiences of success in relation to efficacy (Bandura, 1977, 1982) with some reflection on motivational perspectives as found in self-determination theory (Ryan & Deci, 2000). Of particular interest are the findings that illuminate the views of post-practicum students toward the formative importance of school cooperating teachers, principals, and vice-principals and their lack of reference to university-based supervisors. Of more general interest are possible connections that support the need for a better understanding of intrinsic and extrinsic motivation in relation to perceived competence (self-efficacy) for novice teachers

Relationship of coronary risk factors to hemodialysis-associated ischemic heart disease

Relationship of coronary risk factors to hemodialysis-associated ischemic heart disease. The records of 320 hemodialysis patients at risk for developing ischemic heart disease (IHD) were examined to determine the influence of the established risk factors of blood pressure, smoking, serum triglycerides, and age on the incidence of IHD and to develop coronary risk profiles for the hemodialysis population. The role of packed red blood cell volume, race, sex, and cause of renal failure on the development of IHD were also examined. None of these risk factors alone, with the exception of age and chronic pyelonephritis, were found to contribute significantly to the incidence of dialysis-acquired IHD. When the joint contribution of these variables was analyzed using Cox regression analysis, race and diastolic hypertension also were discovered to contribute significantly to IHD. However, smoking and serum triglycerides were not found to be significant risk factors. From these data, it is concluded that older patients are a greater risk than younger patients, that white patients are at a greater risk than black patients, that patients with elevated diastolic blood pressure are at an increased risk and that patients with chronic pyelonephritis as the underlying renal disease are at an increased risk.Relation entre les facteurs de risque coronarien à cardiopathies ischemiques au cours associé avec hémodialysés. Les dossiers de 320 malades hémodialysés risquant de développer une cardiopathe ischémique (IHD) aient été examiné afin de déterminer l'influence des facteurs de risque connus, pression artérielle, tabagisme, triglycérides sériques et âge sur l'incidence de IHD et de développer des profils de risque coronarien pour la population des hémodialysés. Le rôle du volume des globules rouges, de la race, du sexe, et de la cause de l'insuffisance rénale dans le développement de l'IHD aient été examiné aussi. Aucun de ces facteurs de risque en soi, à l'exception de l'âge et de la pyélonéphrite chronique, aient été trouvé contribuer significativement à l'incidence de l'IHD acquise lors de la dialyse. Lorsque la contribution conjointe de ces variables a été analysée par régression de Cox, la race et l'hypertension diastolique se sont également révélées contribuer significativement à l'IHD. En revanche, le tabagisme et les triglycérides sériques ne sont pas apparus comme étant des facteurs de risque significatifs. De ces données il aie été conclu que les malades plus âgés ont un plus grand risque que les plus jeunes, que les malades blancs ont un plus grand risque que les noirs, que les malades ayant une pression artérielle diastolique élevée ont un risque accru, et que les malades ayant une pyélonéphrite chronique comme néphropathie sous-jacente ont un risque augmenté

Win With SAS ®, JMP ® , and Interest In-House Groups

Abstract Have you considered an in-house group for SAS®, JMP®, or special interests? We discuss how to start and maintain an in-house group. Benefits include leadership opportunity, peer-to-peer interaction, tutorials, collaboration of users and also departments, a focal point for proper requests, and getting to know other users and providers. We present differences in corporate cultures and examples of successful school, company, and government user groups. We then summarize with critical success factors. Expect a lively discussion to follow

Complex Structure in Class 0 Protostellar Envelopes III: Velocity Gradients in Non-Axisymmetric Envelopes, Infall or Rotation?

We present an interferometric kinematic study of morphologically complex protostellar envelopes based on observations of the dense gas tracers N2H+ and NH3. The strong asymmetric nature of most envelopes in our sample leads us to question the common interpretation of velocity gradients as rotation, given the possibility of projection effects in the observed velocities. Several "idealized" sources with well-ordered velocity fields and envelope structures are now analyzed in more detail. We compare the interferometric data to position-velocity diagrams of kinematic models for spherical rotating collapse and filamentary rotating collapse. For this purpose, we developed a filamentary parametrization of the rotating collapse model to explore the effects of geometric projection on the observed velocity structures. We find that most envelopes in our sample have PV structures that can be reproduced by an infalling filamentary envelope projected at different angles within the plane of the sky. The infalling filament produces velocity shifts across the envelope that can mimic rotation, especially when viewed at single-dish resolutions and the axisymmetric rotating collapse model does not uniquely describe any dataset. Furthermore, if the velocities are assumed to reflect rotation, then the inferred centrifugal radii are quite large in most cases, indicating significant fragmentation potential or more likely another component to the line-center velocity. We conclude that ordered velocity gradients cannot be interpreted as rotation alone when envelopes are non-axisymmetric and that projected infall velocities likely dominate the velocity field on scales larger than 1000 AU.Comment: 37 pages, 15 Figures, 2 Tables, Accepted to Ap

A guide for assessing the potential impacts on ecosystems of leakage from CO2 storage sites

Evidence to date indicates that leakage is of low probability if site selection, characterisation and storage project design are undertaken correctly. In Europe, the Storage Directive (EC, 2009) provides a legislative framework, implemented by Member States, which requires appropriate project design to ensure the storage of CO2 is permanent and safe. However, it is incumbent on storage site operators to demonstrate an understanding of the potential impacts on surface ecosystems should a leak occur. The RISCS (Research into Impacts and Safety in CO2 Storage) project has produced a Guide to potential impacts of leakage from CO2 storage (the ‘Guide’). RISCS assessed the potential effects of CO2 leakage from geological storage on both onshore and offshore near-surface ecosystems and on potable ground water. This assessment was achieved through laboratory and field experiments, through observations at sites of natural CO2 seepage and through numerical simulations. The Guide summarises some of the key findings of the project. The Guide provides information on the best approaches to evaluate potential impacts of hypothetical leakage from CO2 storage sites and to provide guidance on appraising these impacts. This information will be relevant to regulators and operators in particular, but also to other stakeholders who are concerned with CO2 storage, such as national and local governments, and members of the public

Combined mutation screening of NKX2-5, GATA4, and TBX5 in congenital heart disease: multiple heterozygosity and novel mutations

Background: Variants of several genes encoding transcription modulators, signal transduction, and structural proteins are known to cause Mendelian congenital heart disease (CHD). NKX2-5 and GATA4 were the first CHD-causing genes identified by linkage analysis in large affected families. Mutations of TBX5 cause Holt–Oram syndrome, which includes CHD as a clinical feature. All three genes have a well-established role in cardiac development. Design: In order to investigate the possible role of multiple mutations in CHD, a combined mutation screening was performed in NKX2-5, GATA4, and TBX5 in the same patient cohort. Samples from a cohort of 331 CHD patients were analyzed by polymerase chain reaction, double high-performance liquid chromatography and sequencing in order to identify changes in the NKX2-5, GATA4, and TBX5 genes. Results: Two cases of multiple heterozygosity of putative disease-causing mutations were identified. One patient was found with a novel L122P NKX2-5 mutation in combination with the private A1443D mutation of MYH6. A patient heterozygote for a D425N GATA4 mutation carries also a private mutation of the MYH6 gene (V700M). Conclusions: In addition to reporting two novel mutations of NKX2-5 in CHD, we describe families where multiple individual mutations seem to have an additive effect over the pathogenesis of CHD. Our findings highlight the usefulness of multiple gene mutational analysis of large CHD cohorts

Complex Structure in Class 0 Protostellar Envelopes II: Kinematic Structure from Single-Dish and Interferometric Molecular Line Mapping

We present a study of dense molecular gas kinematics in seventeen nearby protostellar systems using single-dish and interferometric molecular line observations. The non-axisymmetric envelopes around a sample of Class 0/I protostars were mapped in the N2H+ (J=1-0) tracer with the IRAM 30m, CARMA and PdBI as well as NH3 (1,1) with the VLA. The molecular line emission is used to construct line-center velocity and linewidth maps for all sources to examine the kinematic structure in the envelopes on spatial scales from 0.1 pc to ~1000 AU. The direction of the large-scale velocity gradients from single-dish mapping is within 45 degrees of normal to the outflow axis in more than half the sample. Furthermore, the velocity gradients are often quite substantial, the average being ~2.3 km\s\pc. The interferometric data often reveal small-scale velocity structure, departing from the more gradual large-scale velocity gradients. In some cases, this likely indicates accelerating infall and/or rotational spin-up in the inner envelope; the median velocity gradient from the interferometric data is ~10.7 km/s/pc. In two systems, we detect high-velocity HCO+ (J=1-0) emission inside the highest-velocity \nthp\ emission. This enables us to study the infall and rotation close to the disk and estimate the central object masses. The velocity fields observed on large and small-scales are more complex than would be expected from rotation alone, suggesting that complex envelope structure enables other dynamical processes (i.e. infall) to affect the velocity field.Comment: 85 Pages, 31 Figures, 11 Tables, Accepted to ApJ