Primitive divisors on twists of the Fermat cubic

We show that for an elliptic divisibility sequence on a twist of the Fermat cubic, u3+v3=m, with m cube-free, all the terms beyond the first have a primive divisor

An application of the requirement vs capability analysis to estimating design reliability of solid rocket motors

Design reliability parameters for solid propellant rocket engine

Some pharmacologic actions of yohimbine and chlorpromazine in man

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/117113/1/cpt196233345.pd

Developing Capacity to Care for a Client at Risk for Delirium and for the Acutely Delirious Client

ABSTRACT The purpose of this mixed methods study was: (a) to assess nurses’ knowledge and self-efficacy of caring for clients experiencing delirium and those at risk of developing delirium in a hospital setting prior to and immediately after taking part in a clinical education session, and (b) to explore nurses’ experiences of applying knowledge from the education session to the practice setting. Objectives of the education session included reviewing risks, signs, symptoms, standardized screening tools, and management strategies for clients at risk for or experiencing delirium in a hospital setting. For the quantitative methods portion of the study, participants completed instruments to assess knowledge and self-efficacy prior to and immediately after the education session. Pre- and post-instrument score comparisons were made using t-tests. Overall, nurses were found to have gained knowledge of how to recognize and manage delirium. Nurses’ higher ratings of self-efficacy after participating in a clinical education session suggest that those who believe they can assess for and manage delirious clients might engage in future behaviours to decrease exacerbations or incidences of delirium. In the qualitative phase of the study, interviews were undertaken with seven nurses who had participated in the education program. Interview data was transcribed, and a descriptive content analysis was conducted to develop categories and themes related to nurses’ experience of knowledge translation into practice. The participants’ rich experiences where highlighted in the themes, enhancing emotional intelligence, strengthening clinical judgment to enhance quality of care, and increasing competency for family care. This study demonstrates how continuing education in clinical practice can positively impact nursing knowledge, confidence, and application of knowledge into practice in efforts to decrease the prevalence of delirium. As such, an investment in continuing professional development education for delirium recognition and management is proposed to be a strategy that can positively impact client care. Keywords: nurses, delirium, education, clients, acute care, knowledge, self-efficacy, mixed-method

Internal Friction and Vulnerability of Mixed Alkali Glasses

Based on a hopping model we show how the mixed alkali effect in glasses can be understood if only a small fraction c_V ofthe available sites for the mobile ions is vacant. In particular, we reproduce the peculiar behavior of the internal friction and the steep fall (''vulnerability'') of the mobility of the majority ion upon small replacements by the minority ion. The single and mixed alkali internal friction peaks are caused by ion-vacancy and ion-ion exchange processes. If c_V is small, they can become comparable in height even at small mixing ratios. The large vulnerability is explained by a trapping of vacancies induced by the minority ions. Reasonable choices of model parameters yield typical behaviors found in experiments.Comment: 4 pages, 4 figure

Voyager Mars planetary quarantine Basic math model report

Basic math model study of planetary quarantine effects on Voyager Mars missio

Seasonal Climate Forecasts and Risk Management Among Georgia Farmers

Recent increases in the scientific robustness of seasonal climate forecasts have not led to substantial changes in farmers’ risk management strategies of actors, largely because there is poor integration of scientific forecasting into farmers’ decision-making processes. The goal of the research presented here is to explore the potentials and constraints for farmers’ application of seasonal climate forecasts through an analysis of the cultural contexts of their decision-making and information use. Semi-structured interviews were conducted with 38 farmers in southern Georgia, examining their approaches, risk-management, to livelihood goals and strategies, and interactions with weather and climate information. Findings indicate that farmers’ management of risks associated with climate variability is embedded within a broad array of social factors, including subjective construction of social and personal identities, goals, and values. These cultural contexts affect the ways that farmers interpret and might apply seasonal climate forecasts to agricultural decisions. These findings indicate that, rather than simply acting as a technical information input, seasonal climate forecasts and forecasters must gradually work theirway into farmers’ trusted social networks before their potential as risk management tools will be realized. Furthermore, while seeking to produce scientific information to support farmers’ adaptive practices, scientists themselves must adapt their own practices to better fit a coproduction of knowledge approach

Trace element geochemistry of peridotites from the Izu-Bonin-Mariana Forearc, Leg 125

Trace element analyses (first-series transition elements, Ti, Rb, Sr, Zr, Y, Nb, and REE) were carried out on whole rocks and minerals from 10 peridotite samples from both Conical Seamount in the Mariana forearc and Torishima Forearc Seamount in the Izu-Bonin forearc using a combination of XRF, ID-MS, ICP-MS, and ion microprobe. The concentrations of incompatible trace elements are generally low, reflecting the highly residual nature of the peridotites and their low clinopyroxene content (n ratios in the range of 0.05-0.25; several samples show possible small positive Eu anomalies. LREE enrichment is common to both seamounts, although the peridotites from Conical Seamount have higher (La/Ce)n ratios on extended chondrite-normalized plots, in which both REEs and other trace elements are organized according to their incompatibility with respect to a harzburgitic mantle. Comparison with abyssal peridotite patterns suggests that the LREEs, Rb, Nb, Sr, Sm, and Eu are all enriched in the Leg 125 peridotites, but Ti and the HREEs exhibit no obvious enrichment. The peridotites also give positive anomalies for Zr and Sr relative to their neighboring REEs. Covariation diagrams based on clinopyroxene data show that Ti and the HREEs plot on an extension of an abyssal peridotite trend to more residual compositions. However, the LREEs, Rb, Sr, Sm, and Eu are displaced off this trend toward higher values, suggesting that these elements were introduced during an enrichment event. The axis of dispersion on these plots further suggests that enrichment took place during or after melting and thus was not a characteristic of the lithosphere before subduction. Compared with boninites sampled from the Izu-Bonin-Mariana forearc, the peridotites are significantly more enriched in LREEs. Modeling of the melting process indicates that if they represent the most depleted residues of the melting events that generated forearc boninites they must have experienced subsolidus enrichment in these elements, as well as in Rb, Sr, Zr, Nb, Sm, and Eu. The lack of any correlation with the degree of serpentinization suggests that low-temperature fluids were not the prime cause of enrichment. The enrichment in the high-field-strength elements also suggests that at least some of this enrichment may have involved melts rather than aqueous fluids. Moreover, the presence of the hydrous minerals magnesio-hornblende and tremolite and the common resorption of orthopyroxene indicate that this high-temperature peridotite-fluid interaction may have taken place in a water-rich environment in the forearc following the melting event that produced the boninites. The peridotites from Leg 125 may therefore contain a record of an important flux of elements into the mantle wedge during the initial formation of forearc lithosphere. Ophiolitic peridotites with these characteristics have not yet been reported, perhaps because the precise equivalents to the serpentinite seamounts have not been analyzed

The New Cornwall syenogranite, Nova Scotia: petrology and geochemistry

The New Cornwall syenogranite is a 1.7 km2 intrusion at the southern margin of the Whale Lake monzogranitc of the South Mountain Batholilh of southwestern Nova Scotia- It has a mean SiO2 content of 75 8%, and contains accessory amounts of tourmaline, andalusite, and primary muscovitc. Ratios such as A/CNK (~ 1.25). Rb/K (~215), and Nb/Ta (- 3.5) show that the syenogranitc is not highly fractionated. Although binary clement plots for some elements show the same regular trend for both monzogranite and syenogranite, variations in trace elements such as Rb, Ha, Th and LREE show that the syenogranite is not derived from the monzogranite by fractional crystalli7ation, as the syenogranite has lower Eu and HREE compared with the monzogranite. Similarities in LREE, Nd isotope composition (ℇNd ~ -2) and other geochemical indicators between monzogranite and syenogranitc suggest that they were derived by partial melting of a common source Both the Whale Lake monzogranite and the New Cornwall syenogranite then evolved independently by fractional crystallization and late fluids played only a minor role in the further evolution of the syenogranitc. This represents a third mode of development of mineralized leucogranite in the South Mountain Batholith, in addition to the previously recognized "associated" and "independent" leucogranitc RÉSUMÉ Le syénogranitc de New Cornwall constituc une intrusion de 1.7 kilomètre carré sur la limite méridionale du granite monzonitique du lac Whale, lequcl fait panic du batholithe du mont South, dans le sud-ouest de la Nouvelle-Écosse. Il a une teneur moyenne en Si02 de 75.8 %, et renferme des quantités accessoires de tourmaline, d'andalousite et de muscovite primaire. Les rapports d'A/CNK (~ 1,25), de Rb/K (~ 215) et de Nb/Ta (~ 3,5) révèlent que le syénogranite n'est pas extrémement fractionné. Même si les représentaions graphiques des éléments binaires de certains éléments révèlent la même tendance régulière dans le cas du granite monzonitique et du syénogranite, les variations des éléments traces comme le Rb, lc Ba, lc Th et les éléments de terres rares légers signalent que le syénogranite ne provient pas du granite monzonitique par cristallisation fractionnairc, car le syénogranite posséde des teneurs moindres en Eu et en éléments de terres rares légerds, la comparativement au granite monzonitique. Les similantés existantes en ce qui conceme les éléments de terres rares légers, la composition en isotopes de Nd (ℇNd ~ -2) et d'autres mdicatcurs gêochimiques entrc le granite monzonitique et le syénogranite permettent de supposer qu'ils proviennent d'une fonte partielle d'une source commune. Le granite monzonitique du lac Whale et le syénogranite de New Cornwall ont ensuite tous deux évolué indépendamment par cristallisation fractionnaire et lcs fluides tardifs ont seulement joué un rôle secondairé dans l'évolution ulténeure du syénogranite. Il s'agit la d'un troisieme mode de développemcnt du leucogranitc minéralisé dans le batholithe du mont South, qui s'ajoute aux leucogranites « assoaés » et « indépendants » dèjà rcconnus Traduit par la rédactio