bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Angiotensin-Converting Enzyme Inhibitors in Contrast-Induced Nephropathy: A Meta-Analysis
Authors: Zhou Shiju , Wu Chaoran , Song Qingyin , Yang Xu , Wei Zixiu
Published: May 2016

Aims: The purpose of this study was to evaluate the effect of angiotensin-converting enzyme inhibitors (ACEIs) on contrast-induced nephropathy (CIN) in patients undergoing coronary angiography or percutaneous coronary intervention (PCI). Methods: We searched the Medline, Embase, Cochrane Library, China National Knowledge Infrastructure, Chongqing VIP database and Wanfang database up to December 2014. Pooled risk ratios (RRs) or weighted mean difference (WMD) with their 95% CIs for the CIN incidence, serum creatinine (SCr), estimated glomerular filtration rate (eGFR) and blood urea nitrogen (BUN) of the patients were collected and calculated using the software Review Manager 5.2. Results: A total of 12 separate studies including 1,868 patients (1,011 ACEI cases and 857 controls) were considered in the meta-analysis. The overall RR of the incident CIN in the ACEI group vs. the control group was 0.95 (95% CI 0.57-1.58), and the total WMDs of the ΔSCr, ΔeGFR and ΔBUN were -0.01 (95% CI -0.04 to 0.02), 5.71 (95% CI -0.66 to 12.09) and 0.78 (95% CI -0.16 to 1.73), respectively. Besides, the RR of CIN incidence in the captopril group vs. the control group was 0.72 (95% CI 0.25-2.05, p = 0.54), and the pooled WMD of the ΔSCr was -0.13 (95% CI -0.21 to -0.06, p < 0.01). Conclusion: This meta-analysis suggests that ACEIs administration has no significant influence in the CIN of patients undergoing coronary angiography or PCI; however, captopril might have the potential to prevent CIN.
Thrombin Stimulated Platelet-Derived Exosomes Inhibit Platelet-Derived Growth Factor Receptor-Beta Expression in Vascular Smooth Muscle Cells
Authors: Tan Ming , Yan Hong-Bing , Li Jian-Nan , Li Wen-Ke , Fu Yuan-Yuan , Chen Wen , Zhou Zhou
Published: May 2016

Background/Aims: It is difficult to predict acute thrombotic cardiovascular events in the clinic. Few studies have reported the presence of plasma exosomes containing microRNAs (miRNAs) in cardiovascular events. Therefore, we aimed to investigate the levels of miR-223, miR-339 and miR-21 in plasma exosomes before thrombosis in mouse models of carotid tandem stenosis, as well as the mechanisms underlying the origin and function of these exosomal miRNAs. Methods: Plasma samples were collected from the carotid tandem stenosis and sham control groups of our successfully developed atherothrombosis mouse models before thrombosis. Platelets from healthy volunteers and mice were purified to obtain thrombin stimulated platelet-derived exosomes. Exosomes were isolated via differential ultracentrifugation, and western blotting and transmission electron microscopy were used for their identification. The total RNA was extracted, and quantitative real-time PCR was performed to determine the expression levels of miR-223, miR-339 and miR-21. DAVID Tools were used to analyze the pathways that were enriched among the miRNA target genes. Immuno-fluorescence staining was performed to identify the protein expression levels of platelet-derived exosome target genes in vascular smooth muscle cells (SMCs) in vitro and in vivo. Results: The levels of miR-223, miR-339 and miR-21, which are associated with platelet activation, were elevated in pooled mouse plasma exosomes before thrombosis and enriched in thrombin-stimulated platelet-derived exosomes in vitro. Platelet-derived growth factor receptor-beta (PDGFRβ) was a target of these miRNAs, and PDGFRβ expression in vascular smooth muscle cells (SMCs) was inhibited following incubation with platelet-derived exosomes. Platelet-derived exosomes could also inhibit PDGF-stimulated SMC proliferation. Furthermore, a decrease in PDGFRβ expression was observed in vascular SMCs around thrombotic areas in vivo. Conclusions: Our data indicate that activated platelet-derived exosomes containing miR-223, miR-339 and miR-21 could be transferred into SMCs and inhibit PDGFRβ expression; these exosomal miRNAs may be a biomarker for predicting atherothrombosis.
Impact of Arachidonic Acid and the Leukotriene Signaling Pathway on Vasculogenesis of Mouse Embryonic Stem Cells
Authors: Huang Yu-Han , Sharifpanah Fatemeh , Becker Sven , Wartenberg Maria , Sauer Heinrich
Published: May 2016

Embryonic stem (ES) cells can differentiate into various kinds of cells, such as endothelial and hematopoietic cells. In addition, some evidence suggests that inflammatory mediators such as leukotrienes (LTs), which include the 5-lipoxygenase (LOX) family, can regulate endothelial cell differentiation. In the present study, the eicosanoid precursor arachidonic acid (AA) stimulated vasculogenesis of ES cells by increasing the number of fetal liver kinase-1+ vascular progenitor cells as well as vascular structures positive for platelet endothelial cell adhesion protein-1 and vascular endothelial cadherin. The stimulation of vasculogenesis and expression of the rate-limiting enzyme in the LT signaling pathway, 5-LOX-activating protein (FLAP), was blunted upon treatment with the FLAP inhibitors AM643 and REV5901. Vasculogenesis was significantly restored upon exogenous addition of LTs. Downstream of FLAP, the LTB4 receptor (BLT1) blocker U75302, the BLT2 receptor blocker LY255283 as well as the cysteinyl LT blocker BAY-u9773 inhibited vasculogenesis of ES cells. AA treatment of differentiating ES cells increased reactive oxygen species (ROS) generation, which was not affected upon either FLAP or cyclooxygenase-2 inhibition. Prevention of ROS generation by either the free radical scavengers vitamin E and N-(2-mercaptopropionyl)glycine or the NADPH oxidase inhibitor VAS2870 downregulated vasculogenesis of ES cells and blunted the provasculogenic effect of AA. In summary, our data demonstrate that proinflammatory AA stimulates vasculogenesis of ES cells via the LT pathway by mechanisms involving ROS generation.
A Novel Mutation (S54C) of the PAX8 Gene in a Family with Congenital Hypothyroidism and a High Proportion of Affected Individuals
Authors: Srichomkwun Panudda , Admoni Osnat , Refetoff Samuel , de Vries Liat
Published: May 2016

Background: Congenital hypothyroidism (CH) is a common endocrine disorder in newborns. The cause of CH is thyroid dysgenesis in 80-85% of patients. Paired box gene 8 (PAX8) is a thyroid transcription factor that plays an important role in thyroid organogenesis and development. To date, 22 different PAX8 gene mutations have been reported. Methods: Four generations of a Hungarian Jewish family were affected, and in the 3 generations studied, 9 males and 4 females were affected and 3 first-degree relatives were unaffected. Six were diagnosed at birth [thyroid-stimulating hormone (TSH) level 59-442 mU/l] and 7 at 2-48 years of age (TSH level 6-223 mU/l). One affected patient had thyroid hemiagenesis on ultrasound. Results: Direct sequencing of the PAX8 gene revealed a novel single nucleotide substitution (c.162 A>T) in exon 2 that resulted in the substitution of the normal serine 54 with a cysteine (S54C), which segregated with elevated serum TSH levels. Other mutations of the same amino acid (S54G and S54R) have also been shown to produce functional impairment. Conclusion: We report a large family with a novel mutation in the PAX8 gene presenting with variable phenotype and with a high proportion of affected family members.
Is the Risk of Ovarian Malignancy Algorithm Better Than Other Tests for Predicting Ovarian Malignancy in Women with Pelvic Masses?
Authors: Yanaranop Marut , Anakrat Vahcharapot , Siricharoenthai Somchai , Nakrangsee Saranyu , Thinkhamrop Bandit
Published: May 2016

Aim: The study aimed to compare the risk of ovarian malignancy algorithm (ROMA) with risk of malignancy index (RMI), cancer antigen 125 (CA125), human epididymis protein 4 (HE4) and Sassone ultrasonography (US) score in predicting ovarian cancer (OC) in women who present with pelvic or adnexal masses. Methods: Pelvic US, serum CA125 and HE4 levels were investigated preoperatively in consecutively enrolled Thai women over 18 years with clinically diagnosed pelvic or adnexal masses who were undergoing elective surgery at a super tertiary hospital in Thailand in 2012. ROMA, RMI and Sassone US score were calculated. Results: Of 260 women who were evaluated, 74 had OC. Areas under the receiver operating characteristic curve (AUC) in predicting OC were ROMA, 86.2%; RMI, 87.6%; CA125, 80.6%; HE4, 82.4%; and Sassone score, 77.1%. ROMA and RMI performed similarly well (AUCs 84.4 and 85.6%) in premenopausal women but RMI outperformed ROMA in postmenopausal women (AUCs 87.9 and 84.0%, respectively). At the conventional cutoff value, ROMA and CA125 showed the highest sensitivity (83.8%) but HE4 had the highest specificity (86.0%). Conclusions: ROMA was comparable to RMI in predicting OC. Either ROMA or RMI can be applied to women with pelvic masses, stratified into low- and high-risk groups for OCs.
Atypical Location and Morphology of a Proximal Nail Fold Nevus Mimicking Other Diseases
Authors: Minotto Renan , Della Giustina Andréia , Damiani Leandro , Boff Ana Letícia , Scherer Bastos Karen , Coelho Furtado Bianca
Published: May 2016

Melanocytic nevi result from the proliferation of melanocytes at the dermal-epidermal junction and/or in the dermis and very rarely affect the nail matrix and bed. Intradermal nevi are tumors often diagnosed in routine clinical dermatological practice, with typical clinical and histopathologic aspects, and found in a wide variety of skin sites. We report a case of intradermal melanocytic nevus of the proximal nail fold with uncommon intraoperative gross findings and without involvement of the nail bed or matrix, showing intradermal component only, which draws our attention to the possible different presentation of melanocytic lesions. No description of intradermal nevi at this site has been reported in the literature so far.
Ultrassonografia quantitativa do fígado em gatos com tirotoxicose induzida
Authors: Santos Warley Gomes dos , Monteiro Jessica Nascimento Moraes , Oliveira Daniel Capucho de , Borlini Daniel Cometti , Martins Filho Sebastião , Machado Flávia Mara , Nunes Louisiane De Carvalho , Costa Fabiano Séllos
Published: May 2016

Este estudo avaliou ultrassonograficamente o fígado de gatos submetidos à tirotoxicose induzida pela técnica de histograma dos níveis de cinza com o objetivo de melhor avaliar possíveis alterações hepáticas decorrentes do excesso de hormônios tiroidianos. Para isto, foram utilizados nove gatos hígidos, adulto-jovens, que receberam diariamente 150µg/kg de levotiroxina sódica, por 60 dias. O histograma hepático não demonstrou diferença estatística ao nível de 5% de significância entre os momentos avaliados; entretanto, as variações dos valores das variáveis estudadas sugeriram a promoção de aumento da heterogeneidade e diminuição da ecogenicidade do parênquima hepático quando comparado ao momento inicial. A avaliação citopatológica e histopatológica revelou quadro de hepatite tirotóxica em todos os animais.
Session III: Innervation of the Dentin, Predentin, and Pulp — H.O. Trowbridge, Chairman
Authors: Johnsen D.C.
Published: May 2016

Anatomical characteristics of tooth innervation provide insights into functional capabilities as well as limitations of this organ. In this review, innervation will be discussed from two major viewpoints. The first part will present distribution of nerve fibers in the tooth; nerve pathways, both autonomic and sensory, will be discussed mostly from a descriptive standpoint. In the second part, quantitation of neural units along key points of the pathways will be presented at milestones in tooth and organism development and aging.
Group Coaching on Pre-School Teachers’ Implementation of Pyramid Model Strategies
Authors: Fettig Angel , Artman-Meeker Kathleen
Published: May 2016

The purpose of this article was to describe a group coaching model and present preliminary evidence of its impact on teachers’ implementation of Pyramid Model practices. In particular, we described coaching strategies used to support teachers in reflecting and problem solving on the implementation of the evidence-based strategies. Preliminary results of six pre-school teachers in an early childhood education program who participated in the group coaching were presented. The exploratory data provided findings of impact of the group coaching model and demonstrated that teachers’ implementation of the Pyramid Model practices increased after receiving group coaching. Implications for practice and future research were discussed.
Teaching International Public Relations: An Update Report Among Educators
Authors: Mak Angela Ka Ying
Published: May 2016

Involvement in international and multicultural career-related practices is ever on the rise in a global economic and political society, especially in public relations. This article reported an update of examining the attributes of public relations educators and their institutions in teaching of international public relations (IPR) through an online survey. Results indicated some major improvements (i.e., a double increase of school offered and public relations educators taught IPR course, international perspectives shifted from service to teaching and research, and internationalization as institutional strategic focus). Recommendations for educators and their institutions to prepare themselves and offer the IPR course are discussed.
Cyanoacrylate closure of incompetent great, small and accessory saphenous veins without the use of post-procedure compression: Initial outcomes of a post-market evaluation of the VenaSeal System (the WAVES Study)
Authors: Gibson Kathleen , Ferris Brian
Published: May 2016

Purpose

Cyanoacrylate closure of the great saphenous vein with the VenaSeal™ Closure System is a relatively new modality. Studies have been limited to moderate-sized great saphenous veins and some have mandated postoperative compression stockings. We report the results of a prospective study of cyanoacrylate closure for the treatment of great saphenous vein, small saphenous veins, and/or accessory saphenous veins up to 20 mm in diameter.

Methods

Fifty subjects with symptomatic great saphenous vein, small saphenous veins, and/or accessory saphenous veins incompetence were each treated at a single session. Compression stockings were not used post-procedure. Subjects returned to clinic at week 1 and again at one month. Post-procedure evaluations were performed at seven days and one month and included numerical pain rating score, revised venous clinical severity score, the Aberdeen Varicose Vein Questionnaire score, and time to return to work and normal activities. Duplex ultrasound was performed at each visit.

Findings

Procedural pain was mild (numerical pain rating scale 2.2 ± 1.8). All treated veins (48 great saphenous vein, 14 accessory saphenous veins, and 8 small saphenous veins) had complete closure by duplex ultrasound at seven days and one month. Mean time to return to work and normal activities was 0.2 ± 1.1 and 2.4 ± 4.1 days, respectively. The revised venous clinical severity score was improved to 1.8 ± 1.4 ( p < .001) and Aberdeen Varicose Vein Questionnaire score to 8.9 ± 6.6 ( p < .001) at one month. Phlebitis in the treatment area or side branches occurred in 10 subjects (20%) and completely resolved in all but one subject (2%) by one month; 98% of subjects were “completely” or “somewhat” satisfied, and 2% “unsatisfied” with the procedure at one month, despite the protocol disallowance of concomitant side branch treatment.

Conclusions

Cyanoacrylate closure is safe and effective for the treatment of one or more incompetent saphenous or accessory saphenous veins. Closure rates were high even in the absence of the use of compression stockings or side branch treatment. Time back to work or normal activities was short and improvements in venous severity scores and QOL were significant, comparing favorably with alternative treatment methods.
Fans’ Perceptions of Professional Tennis Events’ Social Media Presence
Authors: Thompson Ashleigh-Jane , Martin Andrew J. , Gee Sarah , Geurin Andrea N.
Published: May 2016

This article aims to develop a better understanding of how sport fans perceive events’ social media presence. An online qualitative survey was conducted with sport fans ( n = 105) of four professional tennis events (Australian Open, Roland Garros, Wimbledon, and U.S. Open). Findings suggest that fans perceive the events’ usage of social media to be about three aspects: interaction, insight, and brand anthropomorphism. In addition, fan responses suggest that while Facebook is the most popular site for general social media usage, these fans consider Twitter to be their most preferred platform to follow the events. Finally, fan responses illustrate three barriers that brands need to overcome in order to successfully develop and execute their social media strategy: competition with other media, a lack of year-round incentives, and technological capabilities of the platforms, which ultimately influenced fans’ motives and use.
Review of Patient Satisfaction Research to Improve Patient Surveys in Medical Imaging Departments
Authors: DiGiacinto Dora , Gildon Bradford , Keenan Le Ann , Patton Michelle
Published: May 2016

Patient satisfaction is important to health care facilities because a satisfied customer tends to return for additional services. Identifying the characteristics that increase patient satisfaction can help facilities improve their process. Few studies have directly evaluated imaging departments, but the literature from other health care specialties can be applied when the environment is similar. Having a pleasant waiting experience has shown to have a positive impact on patients’ overall satisfaction and perceived quality of care. Factors that have been linked to improved patient satisfaction include decreased wait time, decreased perceived length of wait time, and increased communication through written information or increased face-to-face time with a provider.
Redox-active Supramolecular Fibers of a Nitronyl Nitroxide-based Gelator
Authors: Yamaguchi Daisuke , Eimura Hiroki , Yoshio Masafumi , Kato Takashi
Published: May 2016

Redox-active supramolecular fibers of a nitronyl nitroxide radical molecule have been developed. The organic radical gelator forms self-assembled fibers in organic solvents via intermolecular hydrogen bonds to yield physical gels. The redox properties of the fibrous aggregates of the organic radical have been confirmed by cyclic voltammetry.
Cantatas in Honor of San Gennaro
Authors: Deldonna Anthony R.
Published: May 2016

No saint in the Catholic hagiographic tradition has served as a more vivid symbol of martyrdom, veneration, or of God’s profound grace toward a community than San Gennaro (Saint Januarius), the patron saint of the Kingdom of Naples. This essay studies the history and culture surrounding the veneration of San Gennaro. I focus on the longstanding cultivation of cantatas as a vehicle for veneration and for the promotion of catechism and post-Tridentine ideology. The first part of the essay traces political, social, and religious currents that contributed to the growth of the cult. The second part considers late eighteenth-century cantatas by Giovanni Paisiello and Domenico Cimarosa that were created for the Feast of the Traslazione. These works adopt strategies of poetic narrative and musical expression that reflect thematic elements associated with the annual feast. They also represent a musical turning point, incorporating innovative aria types, a widespread use of accompanied recitative and large choral ensembles, and distinctive instrumental sonorities. The Traslazione cantatas thus offer an opportunity not only to examine contemporary cultural currents in early modern Naples, but also to broaden our understanding of the cantata genre and of two leading operatic innovators of the late eighteenth century.
Solidarity, Song, and the Sound Document
Authors: Bohlman Andrea F.
Published: May 2016

This essay offers a media archeology of the cacophonous sounds and songs of the occupational strikes at the Lenin Shipyards in Gdańsk, Poland. Political action over the course of August 1980 led to the formation and legalization of Solidarity, the first independent trade union behind the Iron Curtain. The Polish case study provides a model for the study of music and political activism that brings together history, sound, and music studies, and prompts a broader examination of listening, singing, and collective action. In their immediate wake, the successful protests stimulated celebration, critical analysis, and documentary effort. Across the initial written, recorded, and filmed accounts of the strikes, I observe a pervasive effort to invest sound with the power to authenticate these records as grass-roots history. Such chronicles, which I theorize as “sound documents,” draw attention to the important yet multivalent presence of sound and music in the project of collective opposition to state socialism in Poland through the 1980s. Two ambitious sound documents—an eclectic almanac and a radio montage—form the basis of a variegated account of the highly mediatized soundscape of the Polish strikes. They reveal the significance of anthems and simultaneously underscore the lack of sonic coherence in Gdańsk. Through the sound document, music emerges as a crucial tool through which to rethink and reconfigure the cultural history of collective action.
LA LEY DE RESTITUCIÓN DE TIERRAS EN COLOMBIA DE ESPALDAS A LOS OPOSITORES DE BUENA FE
Authors: Cárdenas Mesa John Arturo
Published: May 2016

Colombia ha tenido grandes avances en materia de reparación a víctimas del conflicto armado interno. De la Ley 387 de 1997 a la Ley 1448 de 2011, ha habido un cambio de paradigma jurídico cultural en el cual la reparación por medio de medidas de restitución han ido cobrando tanta importancia como las reparaciones económicas. El objetivo de este trabajo es mostrar que la Ley de Restitución de Tierras, tal como está concebida, puede originar en una nueva forma de despojo dado que desconoce los derechos de los opositores de buena fe, muchos de los cuales son también campesinos víctimas de la violencia política. Ello se debe a una deficiente regulación en aspectos como el probatorio, a la lentitud con que avanza el proceso y a que no se tuvo en cuenta que la dinámica del despojo y el abandono ocasionado por grupos paramilitares es diferente al originado en la violencia guerrillera. The Land Restitution Law against opponents in good faith Abstract Colombia has made great progress in reparation for the victims of the internal armed conflict; from Law 387 of 1997 to Law 1448 of 2011, there has been a legal paradigm cultural change in which redress through restitution measures have been gaining much importance as economic reparations.The aim of this paper is to show that the Law on Land Restitution, as it is conceived, can result in a new form of dispossession because it ignores opponents in good faith, many of whom are also farmers victims of political violence. This is due to poor regulation in areas such as the evidentiary, to the slowness with which the process advances and to the fact that it was not taken into account that the dynamics of the dispossession and neglect caused by paramilitary groups are different to the originated in guerrilla violence.
Perfil epidemiológico das vítimas dos acidentes de transporte, registrados nos serviços sentinelas da rede viva no município de Cuiabá-MT, 2011
Authors: SILVA Hellen Patrícia Sebastião da , GALVÃO Noemi Dreyer , MURARO Ana Paula
Published: May 2016

Objetivos: Descrever o perfil das vítimas de acidentes de transportes atendidos em três unidades de referência em urgência e emergência na capital de Mato Grosso. Métodos: Estudo descritivo, de corte transversal, com base nas informações sobre as vítimas de acidentes de transporte notificadas em 2011 pelo Projeto VIVA em Cuiabá-MT. Resultados: Em 2011, 241 vítimas de acidentes de transporte foram notificadas (32,1% dos atendimentos). A maioria das vítimas era do sexo masculino (71,4%), jovens (38,4%), de cor da pele preta (76,3%) e com 9-11 anos de estudo (42,7%). Prevaleceram os acidentes envolvendo condutores (72,0%), motociclistas (73,0%) e ocorridos no domingo (21,2%). Os acidentes de trabalho representaram 28,6% dos atendimentos. Conclusão: Os acidentes de transporte representam grande maioria entre as causas externas notificadas, destacando-se entre as vítimas os motociclistas e a população jovem. Observou-se que a Rede VIVA fornece importantes subsídios para investigação de indivíduos mais suscetíveis aos acidentes de transporte.
Estratificação de Risco Cardiovascular na Atenção Primária segundo Escore de Framingham.
Authors: SOUSA Naira Pereira de , SOUSA Maria Fátima de , ARAÚJO Djane Elys Rene de , SANTOS Walterlânia Silva , LIMA Luciano Ramos de , REHEM Tania Cristina Morais Santa Barbara
Published: May 2016

Estratificar o risco cardiovascular em pacientes portadores de hipertensão arterial sistêmica, atendidos em Regional de Saúde no Distrito Federal. Método: Estudo de abordagem quantitativa, com amostra constituída por 51 usuários. Foi aplicado à amostra o Escore de Risco de Framingham que se baseia nos seguintes fatores preditores: idade, LDL (Low Density Lipoproteins) colesterol, HDL (High Density Lipoproteins) colesterol, pressão arterial, diabetes e tabagismo. Os dados foram analisados por meio de média aritmética, desvio-padrão, frequência absolutas e relativas. Resultados: 43,1% apresentou baixo risco, 41,2% moderado risco e 15,7% alto risco cardiovascular. Conclusão: Apesar do Escore de Risco de Framingham ser mais utilizado em cenários externos à Atenção Primária à Saúde a utilização do mesmo poderia ser incorporada aos processos de trabalho das equipes a fim de contribuir para a qualificação da assistência aos pacientes com doenças crônicas, em especial a hipertensão arterial sistêmica.
Lectura y escritura con recursos tics en Educación Superior. Evaluación de la competencia digital
Authors: Arnao Vásquez Marcos Oswaldo , Gamonal Torres Carlos Ernesto
Published: May 2016

La formación universitaria actual exige resolver en forma interdisciplinar y transversal tres problemas básicos de alfabetización: la académica o comunicativa, la investigativa y la digital o tecnológica. La ausencia de diagnósticos para la planificación del microcurrículo planteó como objetivo de este estudio el describir las características de la competencia digital de los estudiantes que ingresan a la universidad. Es un diseño de encuesta tipo cuestionario, cuya muestra la constituyen 269 estudiantes egresados de diferentes escuelas secundarias del departamento de Lambayeque (Perú), ingresantes a la Universidad Católica Santo Toribio de Mogrovejo (USAT). La confiabilidad y validez del instrumento se logró a través de una prueba piloto (n=40), una prueba de contenido (n=8), una prueba de forma (n=3) en las que se valoró los siguientes criterios: tiempo de administración del cuestionario, redacción y comprensión de los ítems, adecuación y claridad de las preguntas, dificultades principales, etc. La fiabilidad de la escala es α de Cronbach = 0,87. Los resultados señalan que los procesos didácticos no han incorporado las tecnologías de información y comunicación a pesar del nivel regular que tienen los estudiantes en el dominio de estos recursos, especialmente de las redes sociales.
Percepciones de teleformadores del Instituto de Formación y Estudios Sociales de Sevilla sobre la teleformación
Authors: Fernández Robles Bárbara , Cabero Almenara Julio
Published: May 2016

Nos encontramos en una sociedad en constante cambio y evolución, por ello, las  necesidades de formación se prolongan más allá de los primeros estudios profesionalizadores y se extienden a lo largo de toda la vida. En este contexto, la teleformación da respuesta a la necesidad de reciclaje profesional y formación permanente de las personas ocupadas, ya que les aporta flexibilidad para actualizar su conocimiento. En la  investigación que presentamos se  analizan los factores que influyen  en la formación de personas ocupadas impartida a través de teleformación, con el objetivo de conocer las variables que hay que tener en cuenta en el diseño instruccional y en la puesta en marcha de las acciones formativas. El enfoque que se utilizó fue mixto, en concreto, los instrumentos que se utilizaron fueron: cuestionario y entrevista. La muestra estaba compuesta por 20 teleformadores de personas ocupadas y por la coordinadora de los teleformadores del Instituto  de Formación y Estudios Sociales de Sevilla.
Spring Safflower Performance under Growth Stage Based Irrigation in the Southern High Plains
Authors: Singh Sukhbir , Angadi Sangamesh V. , St. Hilaire Rolston , Grover Kulbhushan , VanLeeuwen Dawn M.
Published: May 2016

Water stress is the most important environmental factor limiting crop yield in the southern High Plains. Drought tolerant crops along with deficit irrigation strategies may be promising for sustainable agriculture in the region. The objective of this study was to assess water relations, photosynthesis, yield‐forming components, and yield of spring safflower (Carthamus tinctorius L.) cultivars under growth stage based irrigation management. A blocked split plot design was used with irrigation treatments (fully irrigated [FI], stress at vegetative stage [VS], stress at reproductive stage [RS], and dryland [DL]) as the main plot and cultivars (PI8311, 99OL and Nutrisaff) as subplot in four replications. Measurements of water potential (Ψl) indicated that irrigation treatments imposed water stress on safflower. Safflower responded to stress by regulating stomata and osmotic adjustment. Water stress significantly reduced photosynthesis (Pn), leaf area index (LAI) and light interception in all stress treatments, resulting in decreased biomass accumulation. Seed yield of safflower was strongly related to biomass production (R2 = 0.61). Among yield‐forming traits, heads per plant were more influential in yield formation than seeds per head and 1000‐seed weight. Compared to the FI treatment, RS treatment reduced seed yield by 19 and 20% in 2013 and 2014, respectively; while the same reduction in VS treatment was 25 and 22%, respectively. However, seed yield differences between RS and VS treatments were not statistically significant.
Athletic Field Paint Color Impacts Transpiration and Canopy Temperature in Bermudagrass
Authors: Reynolds William Casey , Miller Grady L. , Livingston David P. , Rufty Thomas W.
Published: May 2016

Athletic field paints have varying impacts on turfgrass health that have been linked to their ability to alter photosynthetically active radiation and photosynthesis on the basis of color. It was further hypothesized they may also alter transpiration and canopy temperature by disrupting gas exchange at the leaf surface. Growth chamber experiments evaluated the effects of air temperature and six colors of paint on daily water loss and canopy temperature in ‘Tifway’ bermudagrass [Cynodon dactylon (L.) Pers. x C. transvaalensis Burtt‐Davy]. Daily water loss and canopy temperature were measured every 24 h using gravimetric techniques and an infrared digital thermometer, while lab experiments examined the thickness of white and black paint on the leaf surface. In nonpainted bermudagrass canopies, daily water loss increased (P ≤ 0.0001) with canopy temperature from 29 to 36°C, while in painted bermudagrass canopies it decreased (P ≤ 0.0001) as canopy temperature increased from 29 to 40°C. Yellow and white paint impacted transpiration and canopy temperature the least, while black and blue caused the greatest reductions in transpiration and highest increases in canopy temperature. Cross‐sections of painted Tifway indicate that paint may limit evaporative cooling by clogging stomata. Increased absorption of radiant energy by paint coupled with limited evaporative cooling result in increased heat stress and decreased turfgrass performance in painted canopies.
L’adieu aux armes ?
Authors: Kaya Sümbül
Published: May 2016

Cet article analyse la situation des conscrits des forces armées turques qui ont participé au conflit kurde pendant leur service militaire. Il se demande dans quelle mesure le retour des anciens combattants fait l’objet d’une instrumentalisation par les autorités turques, notamment à partir de la mythification des combats passés et de la sanctification des martyrs. Cela permet une diffusion du mode de pensée sécuritaire dans la société et favorise ainsi un redéploiement du régime sécuritaire dans les structures sociales. Le reversement des anciens combattants dans la vie civile semble en effet pouvoir participer à la diffusion d’un ethos sécuritaire. En outre, la diffusion du mode de pensée sécuritaire engendre un « armement moral » des Turcs vis-à-vis du conflit kurde.
L’adieu aux armes ?
Authors: Perrot Sandrine
Published: May 2016

Le retour à partir de 2003 au nord de l’Ouganda des adultes et surtout des hauts gradés de la Lord’s Resistance Army (LRA) dans un contexte de transition sécuritaire partielle posait des défis à la fois sécuritaires, juridiques et politiques. Cet article entend montrer qu’à travers la valorisation et l’instrumentalisation politique de quelques figures officielles de la réussite en matière de réintégration parmi les hauts gradés, le gouvernement ougandais tente de conquérir – ou du moins de contrôler – ce bastion de l’opposition. Pérennisant les hiérarchies de la guerre, chaînes de commandement et réseaux de mobilisation, l’usage politique des vétérans de la LRA hypothèque le processus de civilianisation des anciens combattants et donc de pacification du champ politique, en d’autres termes, la démilitarisation des relations politiques entre le Nord et le gouvernement central ougandais.
Développement durable et choix des indicateurs : le cas de l’hébergement type Airbnb
Authors: Senn Zilberberg Isabelle , Dornier Raphaël , Selmi Noureddine , Majd Thomas
Published: May 2016

Peu de travaux se sont intéressés au caractère durable des locations saisonnières entre particuliers. En nous basant sur une méthodologie qualitative, nous avons identifié 15 critères destinés à évaluer l’engagement durable des entreprises de ce secteur. Des éléments de réflexion sont aussi apportés quant aux freins et motivations des acteurs de ce secteur à formaliser leur engagement durable et à l’implication des parties-prenantes.
$L^p$ norms of higher rank eigenfunctions and bounds for spherical functions
Authors: Marshall Simon
Published: May 2016

We prove almost sharp upper bounds for the

L^p

norms of eigenfunctions of the full ring of invariant differential operators on a compact locally symmetric space, as well as their restrictions to maximal flat subspaces. Our proof combines techniques from semiclassical analysis with harmonic theory on reductive groups, and makes use of new asymptotic bounds for spherical functions that are of independent interest.
Proof of the cosmic no-hair conjecture in the $\mathbb T^3$-Gowdy symmetric Einstein–Vlasov setting
Authors: Andréasson Håkan , Ringström Hans
Published: May 2016

The currently preferred models of the universe undergo accelerated expansion induced by dark energy. One model for dark energy is a positive cosmological constant. It is consequently of interest to study Einstein’s equations with a positive cosmological constant coupled to matter satisfying the ordinary energy conditions: the dominant energy condition etc. Due to the difficulty of analysing the behaviour of solutions to Einstein’s equations in general, it is common to either study situations with symmetry, or to prove stability results. In the present paper, we do both. In fact, we analyse, in detail, the future asymptotic behaviour of

\mathbb T^3

-Gowdy symmetric solutions to the Einstein–Vlasov equations with a positive cosmological constant. In particular, we prove the cosmic no-hair conjecture in this setting. However, we also prove that the solutions are future stable (in the class of all solutions). Some of the results hold in a more general setting. In fact, we obtain conclusions concerning the causal structure of

\mathbb T^2

-symmetric solutions, assuming only the presence of a positive cosmological constant, matter satisfying various energy conditions and future global existence. Adding the assumption of

\mathbb T^3

-Gowdy symmetry to this list of requirements, we obtain

C^0

-estimates for all but one of the metric components. There is consequently reason to expect that many of the results presented in this paper can be generalised to other types of matter.
O Problema da Braquistócrona: uma proposta para o ensino
Authors: Vieira Clóvis Güerim , Rosa Ramon Junio Gonçalves , Freitas Wellington Damaceno de
Published: May 2016

Nesste trabalho, será apresentado o problema da determinação da curva descrita por uma partícula que, acelerada unicamemte pela força gravitacional, se desloca de um ponto ao outro, no menor tempo possível. O problema será resolvido de duas maneiras distintas. A primeira utiliza o Cálculo das Variações e a segunda, o Princípio de Fermat. A solução para ambos os métodos é a curva ciclóide, como será demonstrado. Será apresentado, também, um experimento didático que permite a inclusão desse tema em aulas do ensino médio de forma lúdica, propondo, ao final, um desafio que interliga este tipo de curva ao cotidiano do aluno.
UMA ANALISE ESPACIAL DA IMIGRAÇÃO NO BRASIL
Authors: Tyskowski Teodoro Rodrigues Karla Cristina , Brambilla Marcos Aurélio , Gabardo da Camara Marcia Regina , Venson Auberth Henrik
Published: May 2016

O objetivo do trabalho a existência de relação espacial entre a imigração e rendimento médio no Brasil para o ano de 2010. Utiliza-se a metodologia de Análise Exploratória de Dados Espaciais (AEDE). Foi realizada a análise univariada da imigração e a análise bivariada da imigração e rendimento médio para identificar os coeficientes bivariados I de Moran, os gráficos de dispersão, os mapas de significâncias e os mapas de clusters das variáveis dos municípios. Os dados foram retirados do Instituto Brasileiro de Geografia e Estatística (IBGE). A análise dos resultados da AEDE permite verificar que a concentração de municípios com os maiores valores de imigração está nas regiões Centro Oeste e Sul do Brasil, e a concentração de municípios com os menores valores de imigração estão no Norte, Nordeste e Sudeste do país e no Rio Grande do Sul. Verifica-se a presença de relação espacial positiva entre rendimentos médios superiores e a imigração no ano de 2010.
Effects of time and rate of nitrogen application on phenology and some agronomical traits of maize (Zea mays L.)
Authors: Sharifi Raouf Seyed , Namvar Ali
Published: May 2016

Maintaining soil fertility and the  use of plant nutrient in sufficient and balanced amounts is one of the key factors in increasing crop yield and decreasing adverse environmental effects and pollutions arising from nonpoint fertilizer usage. The  effects of time and rate of nitrogen application on phenology and some agronomical traits of corn (Zea mays L.) were investigated at the research farm of the University of Mohaghegh Ardabili. The trial was laid out in a split plot design based on a randomized complete block scheme with three replications. Experimental factors were nitrogen fertilizer at four levels (0, 75, 150, and 225 kg ha–1) in the  main plots and three levels of nitrogen application time [(1/3 at sowing +  1/3 at V8–10 +  1/3 at tasseling), (1/2 at sowing +  1/2 at tasseling), and (1/2 at sowing +  1/4 at V8–10 +  1/4 at tasseling) as T1, T2, and T3, respectively] as subplots. The results showed that the maximum values of grain yield and its components, days to 50% tasseling (63.85 days), days to 50% silking (68.2 days), days to physiological maturity (128.9 days) were observed in the plots treated with 225 kg N ha–1 as T1. The maximum nitrogen use efficiency (38.16 kg kg–1) was obtained at application of 75 kg N ha–1 as T1, and the minimum values of this index (19.41 kg kg–1) were obtained in the plots that received 225 kg N ha–1 as T2. Based on the results, it was concluded that application of the highest N fertilizer rate (225 kg ha–1) in three equal splits can be recommended for profitable corn production.
New evidence of dayside plasma transportation over the polar cap to the prevailing dawn sector in the polar upper atmosphere for solar‐maximum winter
Authors: Yang Sheng‐Gao , Zhang Bei‐Chen , Fang Han‐Xian , Kamide Y. , Li Chong‐Yin , Liu Jun‐Ming , Zhang Shun‐Rong , Liu Rui‐Yuan , Zhang Qing‐He , Hu Hong‐Qiao
Published: May 2016

It is well known that owing to the transport of high‐density sunlit plasma from dayside to nightside primarily by convection, polar cap tongue of ionization (TOI), polar cap patches, and blobs are common features in the polar ionosphere. The steep density gradients at the edges of these structures lead to severe problems in applications involving radio waves traversing the ionosphere. To better understand the evolution of TOI/patches/blobs, it is essential to examine how the transported sunlit plasma is distributed. Through averaging the hourly total electron content in solar‐maximum winter, we present complete distribution of polar ionospheric plasma and find that the dayside plasma can be transported through cusp, over polar cap, and eventually to the prevailing dawnside, showing asymmetric distribution around magnetic midnight. The negative interplanetary magnetic field By or Bz component is favored for the plasma transportation from dayside to the prevailing dawn sector. This provides direct evidence for the plasma source of the dawnside high‐density plasma structure. The same corotating convection direction as convection at auroral dawnside is responsible for the prevailing dawn sector transportation. This finding is significant for forecasting TOI/patches/blobs in conducting space weather in the polar ionosphere.
Accurate source location from waves scattered by surface topography
Authors: Wang Nian , Shen Yang , Flinders Ashton , Zhang Wei
Published: May 2016

Accurate source locations of earthquakes and other seismic events are fundamental in seismology. The location accuracy is limited by several factors, including velocity models, which are often poorly known. In contrast, surface topography, the largest velocity contrast in the Earth, is often precisely mapped at the seismic wavelength (>100 m). In this study, we explore the use of P coda waves generated by scattering at surface topography to obtain high‐resolution locations of near‐surface seismic events. The Pacific Northwest region is chosen as an example to provide realistic topography. A grid search algorithm is combined with the 3‐D strain Green's tensor database to improve search efficiency as well as the quality of hypocenter solutions. The strain Green's tensor is calculated using a 3‐D collocated‐grid finite difference method on curvilinear grids. Solutions in the search volume are obtained based on the least squares misfit between the “observed” and predicted P and P coda waves. The 95% confidence interval of the solution is provided as an a posteriori error estimation. For shallow events tested in the study, scattering is mainly due to topography in comparison with stochastic lateral velocity heterogeneity. The incorporation of P coda significantly improves solution accuracy and reduces solution uncertainty. The solution remains robust with wide ranges of random noises in data, unmodeled random velocity heterogeneities, and uncertainties in moment tensors. The method can be extended to locate pairs of sources in close proximity by differential waveforms using source‐receiver reciprocity, further reducing errors caused by unmodeled velocity structures.
Chemical Constituents of Plants from the GenusPsychotria
Authors: Yang Hongmei , Zhang Hongmei , Yang Caiqiong , Chen Yegao
Published: May 2016

Psychotriais a genus ofca. 1500 species in the family Rubiaceae. Up to now, 41 species of thePsychotriagenus have been chemically investigated, and 159 compounds, including alkaloids of indole, quinoline and benzoquinolizidine type, terpenoids, steroids, phenolics and aliphatic compounds have been isolated. These compounds show potent bioactivities, such as antimicrobial, antiviral, and antiparasitic activities.
Heterogeneous Palladium Catalysts for Suzuki–Miyaura Coupling Reactions Involving Aryl Diazonium Salts
Authors: Oger Nicolas , Felpin François‐Xavier
Published: May 2016

This Minireview gives a complete overview of the Suzuki–Miyaura coupling reaction involving aryl diazonium salts catalyzed by heterogeneous palladium catalysts. For each process, the preparation and the properties of the heterogeneous catalysts as well as the catalytic system are critically discussed, providing their strengths and weaknesses.
ChemInform Abstract: Structure of the Acidic Hypophosphate of Europium and the Reasons for Changes of the Bond Lengths in the Hypophosphate Anion (P2O6)4‐.
Authors: PAKHOMOV V. I. , PALKINA K. K. , MAKSIMOVA S. I. , CHIBISKOVA N. T. , MIRONOVA V. S. , TANANAEV I. V.
Published: May 2016

An X‐ray analysis of a monocrystal of EuHP2O6·4 H2O reveals that this compound belongs to the space group Pbnn (Z=4).
ChemInform Abstract: The Surface Modification of Fluorine‐Doped Tin Oxide by the Underpotential Deposition of Noble Metals
Authors: COLTON R. H. , HAGER H. E.
Published: May 2016

strongly influences the rate of sulfide‐polysulfide reduction at the SnO2 electrode.
ChemInform Abstract: On the Role of Boric Acid in the Watts Bath.
Authors: HOARE J. P.
Published: May 2016

The polarization behavior of Pt in various solutions of Ni2+ ions has been investigated by steady‐state and transient voltammetry.
ChemInform Abstract: The Formation of Soluble Pb(IV) and Pb(II) Species in the Reactions of the PbSO4/PbO2 Electrode
Authors: HAEMEENOJA E. + , LAITINEN T. , SUNDHOLM G.
Published: May 2016

is confirmed by combining rotating gold ring‐lead disc electrode techniques and X‐ray photoelectron spectroscopy.
ChemInform Abstract: A Bipolar Model of the Passivity of Stainless Steel: The Role of Mo Addition.
Authors: CLAYTON C. R. , LU Y. C.
Published: May 2016

The addition of 2.5 wt.% Mo to Fe19 Cr9 Ni results in the formation of a passive film (0.1 M HCl, ‐180 mV vs.
ChemInform Abstract: Electrochemical and SERS Investigation of the Influence of pH on the Effectiveness of Some Corrosion Inhibitors of Copper.
Authors: MUSIANI M. M. , MENGOLI G. , FLEISCHMANN M. , LOWRY R. B.
Published: May 2016

The adsorption behavior of benzotriazole (BTA), 2‐mercaptobenzothiazole (MBT), 2‐mercaptobenzimidazole (MBI), and 2‐mercaptobenzoxazole (MBO) on Cu has been studied in KCl solution of pH 2 and pH 7. The undissociated inhibitors and their anions are adsorbed simultaneously, the concentration ratio depending on pH and electrode potential.
ChemInform Abstract: Optical Anisotropies of Alkylcyanobicyclohexyls and Related Compounds.
Authors: NAVARD P. , FLORY P. J.
Published: May 2016

Mean‐square optical anisotropies of cyanocyclohexane, bicyclohexyl, and the trans‐4‐cyano‐trans‐4'‐n‐alkyl‐bicyclohexyls (I) have been determined from depolarized Rayleigh light‐scattering measurements conducted on dilute solutions in CCl4.
ChemInform Abstract: Determination of the Bonding Preference of Borane (BH3) Toward Aminoarsines by Multinuclear NMR Spectroscopy.
Authors: KANJOLIA R. K. , KRANNICH L. K. , WATKINS C. L.
Published: May 2016

The reactions of BH3·THF with selected (dialkylamino)dimethylarsines (alkyl: ‐Me, ‐Et, ‐Pr, ‐iPr) have been carried out as a function of temp. to determine the initial coordination site of boron and to elucidate the nature of any As‐N, As‐B, and N‐B bond dissociation/formation processes in solution.
ChemInform Abstract: The Isolation of Avenacins A‐1, A‐2, B‐1, and B‐2, Chemical Defences Against Cereal “Take‐All” Disease. Structure of Their “Aglycones”, the Avenestergenins, and Their Anhydro Dimers.
Authors: BEGLEY M. J. , CROMBIE L. , CROMBIE W. M. L. , WHITING D. A.
Published: May 2016

Acid hydrolysis of the title triterpene glycosides avenacin A‐1, A‐2, B‐1 and, B‐2, which are isolated from oat roots, yields the corresponding avenestergenins (Ia)‐(Id).