bluuebunny/crossref_metadata_2025_split huggingface dataset:
I want to quit education: A longitudinal study of stress and optimism as predictors of school dropout intention
Authors: Eicher Véronique , Staerklé Christian , Clémence Alain 
Published: August 2014

ABSTRACTPrior research on school dropout has often focused on stable person‐ and institution‐level variables. In this research, we investigate longitudinally perceived stress and optimism as predictors of dropout intentions over a period of four years, and distinguish between stable and temporary predictors of dropout intentions. Findings based on a nationally representative sample of 16–20 year‐olds in Switzerland (N = 4312) show that both average levels of stress and optimism as well as annually varying levels of stress and optimism affect dropout intentions. Additionally, results show that optimism buffers the negative impact of annually varying stress (i.e., years with more stress than usual), but not of stable levels of stress (i.e., stress over four years). The implications of the results are discussed according to a dynamic and preventive approach of school dropout.
Advocacy: The role of health professional associations
Authors: Shaw Dorothy 
Published: August 2014

AbstractThe FIGO Leadership in Obstetrics and Gynecology for Impact and Change (LOGIC) Initiative in Maternal and Newborn Health was developed on the premise that organizational capacity strengthening in eight low‐ and middle‐income countries would result in improved ability of member associations to take a leadership role in engaging a range of stakeholders in the health sector to discuss evidence and facilitate policy change and clinical practice in maternal and newborn health. Definitions of relevant terms, principles, and a framework for an advocacy plan are presented. The term advocacy is typically not well understood by health professionals, nor generally thought to be part of their role as a clinician, researcher, or educator. “Influence” based on expertise is often more consonant with a clinician's reality, especially where advocacy is perceived as a more political process that may present a barrier in some countries. The organizational capacity development of the FIGO member associations was integral to their ability to exert influence based on evidence, both internally in their associations and with other stakeholders, including the Ministry of Health. Examples of advocacy from each of the eight LOGIC countries are provided, noting that evaluation of impact can be challenging.
Key Strategies for Improving Outcomes of Patients With Peripheral Venous Catheters: Report of an International Panel Discussion
Authors: Goossens Godelieve Alice , Hadaway Lynn 
Published: August 2014

Abstract
We report the opinions of a panel of infection prevention experts convened during the 2012 World Congress on Vascular Access. The panel reviewed topics related to the use of peripheral venous catheters (PVCs), with a specific focus on infection prevention. The international panel members agreed that lack of clinical evidence and scientific research regarding PVC management is a major cause of significant variances in practice. The panel members outlined a number of strategies that promote infection prevention during PVC use. However, overall agreement on all issues was not reached. Reasons for nonresolution were differences in the organization of health care systems among countries, differences in availability of materials among countries, and difference in national or supranational regulations.
Up for the Challenge: Eliminating Peripherally Inserted Central Catheter Infections in a Complex Patient Population
Authors: Tavianini Holly D. , Deacon Vera , Negrete Judylee , Salapka Sharon 
Published: August 2014

Abstract
Background: In response to Medicare reimbursement changes related to central line-associated blood stream infection (CLABSI) effective January 2011, a long-term acute care hospital implemented quality improvement measures to reduce these health care-associated infections. Improvements included alcohol-impregnated port protectors, chlorhexidine gluconate barrier dressings, and didactic/hands on training for care and maintenance. During 2010 the peripherally inserted central line (PICC) team at a neighboring Magnet hospital was asked to partner and develop strategies to further decrease CLABSI.
Methods: The PICC team evaluated the effects of an antimicrobial PICC device in an effort to further reduce the incidence of CLABSI. Upon initiation of the evaluation phase, a database was created to track infection/thrombus rate, insertion-related complications, dwell time, diagnosis, tip location, infusate, vein used, and catheter size. Data collection and reporting was managed by the PICC team.
Results: Across a 2-year period (July 2011–July 2013), 100 devices were inserted with a total of 1,705 line days without any reported CLABSI. The majority of patients received a 4.5F single lumen device (59%). Dwell time ranged from 1 to 57 days with an average of 17 days. To date, no CLABSIs related to this device have been reported at the long-term acute care hospital.
Conclusions: Based on 100 insertions yielding no infections this new product appears to improve patient safety and quality of care. Relative to these results sole use of this product has become their institutional standard for long-term intravenous needs.
The Influence of an Antimicrobial Peripherally Inserted Central Catheter on Central Line-Associated Bloodstream Infections in a Hospital Environment
Authors: Rutkoff Glenell S. 
Published: August 2014

Abstract
Background: Federal agencies such as the Centers for Disease Control and Prevention have mandated reduction of hospital-acquired infections and recommended the use of antimicrobial catheters in clinical settings where central line-associated bloodstream infection (CLABSI) rates have remained high. The Infusion Nurses Society also recommends antimicrobial catheters for specific patient populations. At a California hospital, evidence-based infection prevention strategies for CLABSI prevention had been in effect for several years, but the CLABSI rate remained at an unacceptable level. For this reason, the effect of an antimicrobial peripherally inserted central catheter (PICC) on the incidence of CLABSI was studied.
Methods: A quasiexperimental design was used with concurrent data collection on patients in an intervention group who received an antimicrobial PICC. Retrospective data were collected for patients in a nonintervention group who received nonantimicrobial PICCs the previous year.
Results: The 257 patients in the nonintervention group experienced 8 CLABSIs with an infection rate of 4.18/1,000 line days. The 260 subjects in the intervention group experienced 1 CLABSI with an infection rate of 0.47/1,000 line days. The decrease in the number of infections per 1,000 line days for the intervention group was statistically significant.
Conclusions: The use of an antimicrobial PICC in conjunction with current infection prevention practices resulted in a statistically significant decrease in infection rate, which supports the recommendation for continued use of antimicrobial catheters. Treatment cost savings, which overcame the higher initial cost for the devices, were found to be an additional benefit of using antimicrobial catheters.
Modeling large-scale dynamic processes in the cell: polarization, waves, and division
Authors: Sept David , Carlsson Anders E. 
Published: August 2014

AbstractThe past decade has witnessed significant developments in molecular biology techniques, fluorescent labeling, and super-resolution microscopy, and together these advances have vastly increased our quantitative understanding of the cell. This detailed knowledge has concomitantly opened the door for biophysical modeling on a cellular scale. There have been comprehensive models produced describing many processes such as motility, transport, gene regulation, and chemotaxis. However, in this review we focus on a specific set of phenomena, namely cell polarization, F-actin waves, and cytokinesis. In each case, we compare and contrast various published models, highlight the relevant aspects of the biology, and provide a sense of the direction in which the field is moving.
Mineral-scale Sr isotope variation in plutonic rocks — a tool for unravelling the evolution of magma systems
Authors: Davidson Jon P. , Font Laura , Charlier Bruce L. A. , Frank J. Tepley  
Published: August 2014

AbstractIsotope ratios of elements such as Sr, Nd, Pb and Hf can be used as tracers of magmatic sources and processes. Analytical capabilities have evolved so that isotope ratios can now be analysed in situ, and isotopic tracers can therefore be used within single minerals to track the changing magmatic environment in which a given mineral grew. This contribution shows that Sr isotope ratios in feldspars that make up plutonic rocks will typically preserve initial isotopic variations, provided precise and accurate age corrections can be applied. Variations in initial isotope ratio can give a core-to-rim record of magmatic evolution and can be used to diagnose open system events such as contamination and magma recharge and mixing.New single grain Sr isotope data are presented from the Dais Intrusion, Antarctica, which reflect an open system origin for the crystals. The crystal cargo appears to be aggregated and assembled during transport and emplacement. This model, as opposed to a magma body crystallising post emplacement, may be more applicable to plutonic rocks in general, and is testable using the in situ isotopic determination methods described here.
Eleven million years of arc volcanism at the Aucanquilcha Volcanic Cluster, northern Chilean Andes: implications for the life span and emplacement of plutons
Authors: Grunder Anita L. , Klemetti Erik W. , Feeley Todd C. , McKee Claire M. 
Published: August 2014

ABSTRACTThe arid climate of the Altiplano has preserved a volcanic history of ∼11 million years at the Aucanquilcha Volcanic Cluster (AVC), northern Chile, which is built on thick continental crust. The AVC has a systematic temporal, spatial, compositional and mineralogical development shared by other long-lived volcanic complexes, indicating a common pattern in continental magmatism with implications for the development of underlying plutonic complexes, that in turn create batholiths.The AVC is a ∼700-km2, Tertiary to Recent cluster of at least 19 volcanoes that have erupted andesite and dacite lavas (∼55 to 68 wt.% SiO2) and a small ash-flow tuff, totalling 327 ± 20 km3. Forty 40Ar/39Ar ages for the AVC range from 10·97 ± 0·35 to 0·24 ± 0·05 Ma and define three major 1·5 to 3 million-year pulses of volcanism followed by the present pulse expressed as Volcán Aucanquilcha. The first stage of activity (∼11–8 Ma, Alconcha Group) produced seven volcanoes and the 2-km3 Ujina ignimbrite and is a crudely bimodal suite of pyroxene andesite and dacite. After a possible two million year hiatus, the second stage of volcanism (∼6–4 Ma, Gordo Group) produced at least five volcanoes ranging from pyroxene andesite to dacite. The third stage (∼4–2 Ma, Polan Group) represents a voluminous pulse of activity, with eruption of at least another five volcanoes, broadly distributed in the centre of the AVC, and composed dominantly of biotite amphibole dacite; andesites at this stage occur as magmatic inclusions. The most recent activity (1 Ma to recent) is in the centre of the AVC at Volcán Aucanquilcha, a potentially active composite volcano made of biotite-amphibole dacite with andesite and dacite magmatic inclusions.These successive eruptive groups describe (1) a spatial pattern of volcanism from peripheral to central, (2) a corresponding change from compositionally diverse andesite-dacite volcanism to compositionally increasingly restricted and increasingly silicic dacite, (3) a change from early anhydrous mafic silicate assemblages (pyroxene dominant) to later biotite amphibole dacite, (4) an abrupt increase in eruption rate; and (5) the onset of pervasive hydrothermal alteration.The evolutionary succession of the 327-km3 AVC is similar to other long-lived intermediate volcanic complexes of very different volumes, e.g., eastern Nevada (thousands of km3, Gans et al. 1989; Grunder 1995), Yanacocha, Perú (tens of km3, Longo 2005), and the San Juan Volcanic System (tens of thousands of km3, Lipman 2007) and finds an analogue in the 10-m. y. history and incremental growth of the Cretaceous Tuolumne Intrusive Suite (Coleman et al. 2004; Glazner et al. 2004). The present authors interpret the AVC to reflect episodic sampling of the protracted and fitful development of an integrated and silicic middle to upper crustal magma reservoir over a period of at least 11 million years.
The Trawenagh Bay Granite and a new model for the emplacement of the Donegal Batholith
Authors: Stevenson Carl T. E. , Hutton Donald H. W. , Price Alun R. 
Published: August 2014

ABSTRACTThe Trawenagh Bay Granite (TBG) is shown to be a tabular pluton with gently inclined contacts that, from anisotropy of magnetic susceptibility (AMS) studies, was emplaced as a series of flow lobes whose geometries indicate that it flowed horizontally towards the W out of late stage adjacent steeply inclined monzogranite sheets of the Main Donegal Granite (MDG). We thus confirm in detail the central broad idea of the Pitcher & Read (1959) model that the Main Donegal Granite fed the Trawenagh Bay Granite. Early TBG flow lobes cut and are cut by deformation associated with the sinistral shear zone in which the MDG lies, thus demonstrating synchronicity of shearing and magmatism. The TBG magma leaked out of the shear zone and emplaced into undeformed country rocks and was probably guided by shear zone splays that die out along its northern and southern margins. At a late stage in the development of MDG, the splays developed from the NNE-trending SW boundary of the shear zone and caused a gap in this structure through which TBG magma was channelled out of the MDG. A review is presented of the last twenty-five years of published and unpublished work on the batholith, showing that the MDG shear zone was a long-lived structure almost certainly in existence before the emplacement of that body, and that four of the contiguous granitiods (Thorr, Ardara, and Rosses, as well as Trawenagh Bay) were all sourced within the shear zone. A new model is presented for the development of the batholith. The pre-existing crustal structure was a deep-seated N12°E fault in the basement to the Dalradian wall rocks of the granites, that was coupled to up to six other more minor WNW–ESE basement faults in the W. A NE–SW-trending sinistral shear zone was initiated at the end of the Caledonian orogeny, as calc-alkaline and deep-seated appinites were generated in the area. This shearing activated the pre-existing structures at the current crustal level, and the N12°E structure acted as a continental transform fault which allowed the dilation needed to facilitate the wedging space requirements of the MDG and the other units in the shear zone, as well as transferring regional sinistral shear through the system. The Thorr and Ardara plutons were emplaced first into the shear zone and then those magmas leaked out into the adjacent wall rocks: one to form a large laccolith, the other to form a balloon. Steep early MDG complex sheets (granodiorites and tonalities) were emplaced in the shear zone between the Thorr and Ardara emplacement sites. Dilation continued until late stage extensive monzogranite sheets were intruded in the NW and SE of the pluton. One of these probably leaked material westward to form the Rosses laccolith and southwestwards to form the TBG in the final stages of shear zone movement.
Comprehension asymmetries in language acquisition: a test for Relativized Minimality
Authors: VARLOKOSTA SPYRIDOULA , NERANTZINI MICHAELA , PAPADOPOULOU DESPINA 
Published: August 2014

ABSTRACTCross-linguistic studies have shown that typically developing children have difficulties comprehending non-canonical structures. These findings have been interpreted within the Relativized Minimality (RM) approach, according to which local relations cannot be established between two terms of a dependency if an intervening element possesses similar morphosyntactic features. In an extension of RM, Friedmann, Belletti, and Rizzi (2009) suggested that lexical NP restriction is the source of minimality effects in non-canonical sentences. The present study aimed at investigating whether the predictions of their account can be confirmed in Greek. Our results indicate that although lexical NP restriction is a crucial factor in generating minimality effects, it is not always sufficient to account for the comprehension difficulties that young children face with non-canonical sentences, since the internal structure (i.e. the feature specification) of the moved element and of the intervener affects their performance, as well.
Supportive care needs of cancer patients: A literature review
Authors: Smith Ayana , Hyde Yolanda M. , Stanford Deb 
Published: August 2014

AbstractObjective:This review of the research literature explored the supportive care needs of cancer patients of varying ages and genders at varying stages of cancer treatment.Method:We conducted a search of online databases of peer-reviewed studies published in the English language between 2009 and 2014.Results:This paper reviews research studies that explored the supportive care needs of cancer patients through focus groups, surveys, and interviews. The samples addressed varied in age, ethnicity, and gender.Significance of Results:One major need identified was the requirement of informational support. Other essential needs included emotional, spiritual, and financial support. Supportive care can be administered in various ways—for example, by religious communities or caregivers as well as providers. However, healthcare providers must recognize the supportive care needs of their patients and incorporate effective resources and interventions into treatment plans.
The dictator effect: how long years in office affect economic development
Authors: PAPAIOANNOU KOSTADIS J. , VAN ZANDEN JAN LUITEN 
Published: August 2014

AbstractThis paper contributes to the growing literature on the links between political regimes and economic development by studying the effects of years in office on economic development. The hypothesis is that dictators who stay in office for a long time period will find it increasingly difficult to carry out sound economic policies. We argue that such economic policies are the result of information asymmetries inherent to dictatorships (known as the ‘dictator dilemma’) and of changes in the personality of dictators (known as the ‘winner effect’). We call the combination of these two terms the ‘dictator effect’. We present evidence to suggest that long years in office impacts on economic growth (which is reduced), inflation (which increases) and the quality of institutions (which deteriorates). The negative effect of long years of tenure (i.e. the ‘dictator effect’) is particularly strong in young states and in Africa and the Near East.
Disturbance and temporal partitioning of the activated sludge metacommunity
Authors: Vuono David C , Benecke Jan , Henkel Jochen , Navidi William C , Cath Tzahi Y , Munakata-Marr Junko , Spear John R , Drewes Jörg E 
Published: August 2014

Abstract
The resilience of microbial communities to press disturbances and whether ecosystem function is governed by microbial composition or by the environment have not been empirically tested. To address these issues, a whole-ecosystem manipulation was performed in a full-scale activated sludge wastewater treatment plant. The parameter solids retention time (SRT) was used to manipulate microbial composition, which started at 30 days, then decreased to 12 and 3 days, before operation was restored to starting conditions (30-day SRT). Activated sludge samples were collected throughout the 313-day time series in parallel with bioreactor performance (‘ecosystem function’). Bacterial small subunit (SSU) rRNA genes were surveyed from sludge samples resulting in a sequence library of &gt;417 000 SSU rRNA genes. A shift in community composition was observed for 12- and 3-day SRTs. The composition was altered such that r-strategists were enriched in the system during the 3-day SRT, whereas K-strategists were only present at SRTs⩾12 days. This shift corresponded to loss of ecosystem functions (nitrification, denitrification and biological phosphorus removal) for SRTs⩽12 days. Upon return to a 30-day SRT, complete recovery of the bioreactor performance was observed after 54 days despite an incomplete recovery of bacterial diversity. In addition, a different, yet phylogenetically related, community with fewer of its original rare members displaced the pre-disturbance community. Our results support the hypothesis that microbial ecosystems harbor functionally redundant phylotypes with regard to general ecosystem functions (carbon oxidation, nitrification, denitrification and phosphorus accumulation). However, the impacts of decreased rare phylotype membership on ecosystem stability and micropollutant removal remain unknown.
Aquatic metagenomes implicate Thaumarchaeota in global cobalamin production
Authors: Doxey Andrew C , Kurtz Daniel A , Lynch Michael D J , Sauder Laura A , Neufeld Josh D 
Published: August 2014

Abstract
Cobalamin (vitamin B12) is a complex metabolite and essential cofactor required by many branches of life, including most eukaryotic phytoplankton. Algae and other cobalamin auxotrophs rely on environmental cobalamin supplied from a relatively small set of cobalamin-producing prokaryotic taxa. Although several Bacteria have been implicated in cobalamin biosynthesis and associated with algal symbiosis, the involvement of Archaea in cobalamin production is poorly understood, especially with respect to the Thaumarchaeota. Based on the detection of cobalamin synthesis genes in available thaumarchaeotal genomes, we hypothesized that Thaumarchaeota, which are ubiquitous and abundant in aquatic environments, have an important role in cobalamin biosynthesis within global aquatic ecosystems. To test this hypothesis, we examined cobalamin synthesis genes across sequenced thaumarchaeotal genomes and 430 metagenomes from a diverse range of marine, freshwater and hypersaline environments. Our analysis demonstrates that all available thaumarchaeotal genomes possess cobalamin synthesis genes, predominantly from the anaerobic pathway, suggesting widespread genetic capacity for cobalamin synthesis. Furthermore, although bacterial cobalamin genes dominated most surface marine metagenomes, thaumarchaeotal cobalamin genes dominated metagenomes from polar marine environments, increased with depth in marine water columns, and displayed seasonality, with increased winter abundance observed in time-series datasets (e.g., L4 surface water in the English Channel). Our results also suggest niche partitioning between thaumarchaeotal and cyanobacterial ribosomal and cobalamin synthesis genes across all metagenomic datasets analyzed. These results provide strong evidence for specific biogeographical distributions of thaumarchaeotal cobalamin genes, expanding our understanding of the global biogeochemical roles played by Thaumarchaeota in aquatic environments.