bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evaluación a profesores en las competencias matemáticas de Educación Media, Juigalpa, 2014
Authors: Romero Díaz Tonys , Guzmán Contreras José Eligio 
Published: February 2017

Este artículo fue producto de un diagnóstico, obtenido al aplicar una prueba de matemática, que consistió en el examen de admisión para el nuevo ingreso 2014 que aplica la Universidad Nacional Autónoma de Nicaragua, Managua. Se utilizó una muestra de veinte profesores del municipio de Juigalpa, Chontales, quienes de manera voluntaria aplicaron al examen. Se realizó un análisis de discriminación a cada uno de los ítems que componían la prueba, así como a todo el examen. Paralelamente al análisis cuantitativo, se identificó una serie de problemas en la resolución del examen a través de un análisis cualitativo de cada uno de los ejercicios planteados. Los resultados reflejaron que los profesores de secundaria del municipio de Juigalpa presentan dificultades en la resolución de ejercicios que son evaluados en los exámenes de admisión de la UNAN-Managua. Las áreas de estudio más afectadas en el examen fueron: la geometría euclidiana, los logaritmos, la teoría de conjuntos, la estadística, funciones reales y la trigonometría. Se recomienda establecer una estrategia de trabajo en conjunto UNAN-Managua y el Ministerio de Educación que refuerce la competencia de los docentes en pro de beneficiar al estudiantado de secundaria para los futuros exámenes de admisión.SummaryThis article was the result of a diagnostic that was obtained by applying a math test, which consisted of the admission test for new students of the year 2014 that the National Autonomous University of Nicaragua (Managua) applies. We used a sample of twenty teachers from the municipality of Juigalpa, Chontales who voluntarily applied the test. The discrimination analysis was done to each of the items that made up the test, as well as the entire test. Parallel to the quantitative analysis, a series of problems were identified in resolving the test through a qualitative analysis of each of the exercises.The results showed that secondary teachers in the municipality of Juigalpa presents difficulties in resolving the exercises that are evaluated in the admission test of the UNAN-Managua. The study areas that are most affected in the test were: Euclidean geometry, logarithms, set theory, statistics, real functions and trigonometry. Therefore, based on the results, it is recommended to establish a strategy of working together UNAN-Managua and the Ministry of Education to strengthen the teacher’s competence in order to benefit secondary students for future admissions tests.
Una mirada al antiimperialismo latinoamericano desde la invasión norteamericana en Nicaragua y la fundación de la Liga Anti-imperialista de San Salvador (1926-1927)
Authors: Deras Roberto 
Published: February 2017

La Liga Antiimperialistade las Américas (LADLA) fue fundada enla Ciudadde México el año de 1925, como uno de los primeros intentos, por parte dela InternacionalComunista, de crear una organización capaz de denunciar la presencia intervencionista de Estados Unidos en la región.La principal tarea fue instaurar un frente único que aglutinara a representantes de todos los sectores revolucionarios y progresistas que veían con preocupación el expansionismo económico estadounidense, pero al mismo tiempo buscar apoyo al proceso revolucionario soviético. En El Salvador se organizaron dos ligas, la primera se constituyó como sector de la sección centroamericana dela LADLA; la otra liga surgió desvinculada del comunismo internacional, se estableció en la ciudad de San Salvador y se constituyó como una organización en pro de la autonomía económica y política de los pueblos hispanoamericanos; fundamentalmente del pueblo de Nicaragua. El presente artículo pretende mostrar el ideario y la actualización de la segunda organización:la LigaAnti-Imperialistade San Salvador. Realidad: Revista de Ciencias Sociales y de humanidades No. 136, 2013: 281-328
“Nurses eat their young”: A novel bullying educational program for student nurses
Authors: Gillespie Gordon Lee , Grubb Paula L. , Brown Kathryn , Boesch Maura C. , Ulrich Deborah L. 
Published: February 2017

Bullying is a known and ongoing problem against nurses. Interventions are needed to prepare nursing students to prevent and mitigate the bullying they will experience in their nursing practice. The purpose of this article is to describe the development process and utility of one such intervention for use by nursing faculty with nursing students prior to their students’ entry into the profession. The educational program was critiqued by an advisory board and deemed to be relevant, clear, simple, and non-ambiguous indicating the program to have adequate content validity. The program then was pilot tested on five university campuses. Faculty members who implemented the educational program discussed (1) the program having value to faculty members and students, (2) challenges to continued program adoption, and (3) recommendations for program delivery. The proposed multicomponent, multiyear bullying educational program has the potential to positively influence nursing education and ultimately nursing practice. Findings from the pilot implementation of the program indicate the need to incorporate the program into additional nursing courses beginning during the sophomore year of the nursing curricula.
A Study of Lumbar Disc Herniation and Facet Joint Asymmetry
Authors: Lai Qi , Liu Yuan , Guo Runsheng , Lv Xin , Wang Qiang , Zhu Jianghao , Zhang Bin , Dai Min 
Published: February 2017

Purpose:
To investigate the association of facet joint asymmetry with lumbar disc herniation at the lower lumbar spine.

Methods:
A total of 90 patients (ages 18–40 years) with single-level disc herniation (L3–L4, L4–L5, or L5–S1) were included in the study. Facet asymmetry was defined as a difference of 10° in facet joint angles between right and left sides. Normal discs in the same segment of other individuals were used as a control. Patients had facet asymmetry measured for L3 to S1 through 3.0T magnetic resonance imaging, and information was collected, including age, sex, degenerative degree of lumbar facet joints, and the presence or absence of lumbar disc herniation and type.

Results:
At the L3 to L4 level, 2 cases had facet asymmetry in 8 patients with lumbar disc herniation, compared with 17 cases of facet asymmetry in 82 patients without disc herniation (P = 0.7776, r = 0.030). At the L4 to L5 level, there were 21 cases of facet asymmetry in 45 patients with lumbar disc herniation, compared with 5 cases of asymmetry in 45 patients without disc herniation (P = 0.00019, r = 0.392). At the L5 to S1 level, there were 25 cases of facet asymmetry in 37 patients with lumbar disc herniation, compared with 11 cases of facet asymmetry in 53 patients without disc herniation (P = 0.0000, r = 0.492). There were 23 cases of facet asymmetry in 28 disc herniations of side type compared with 2 cases of facet asymmetry in 9 herniations of center type (P = 0.0008, r = 0.364). There was no significant difference in the relationship between age, facet joint degeneration, and lumbar facet joint asymmetry (P &gt; 0.05).

Conclusion:
Facet asymmetry is significantly associated with lumbar disc herniation at the L4 to L5 and the L5 to S1 levels, whereas there is an obvious association with the side type of lumbar disc herniation at the L5 to S1 level.
Preparation and Characterization of Sugar Based Catalyst on Various Supports
Authors: Janaun Jidon Adrian , Mey Tan Jaik , Bono Awang , Krishnaiah Duduku 
Published: February 2017

A novel structured carbon-based acid catalyst was prepared by depositing the carbon precursor onto glass, ceramic and aluminum supports via dip-coating method, followed by carbonization process for converting the d-glucose layer into black carbon char in an inert nitrogen environment at 400 °C. Then, the –SO3H group was introduced into the framework of the carbon char by multiple vapor phase sulfonation. Four different carbonization methods were carried out (dry pyrolysis and hydrothermal carbonization with or without pressurized) in the catalyst preparation while among the carbonization methods, the samples which prepared from dry pyrolysis without pressurized process showed the strong acidity due to highest adsorption of acid group in the catalyst surface although the catalyst attached onto the support was the least compared to other preparation methods. Among the catalysts, the sulfonated carbon-base catalyst that is attached on the ceramic support exhibited the highest aci-dity (1.327 mmol/g) followed by the catalyst deposited on the glass (0.917 mmol/g) and aluminum (0.321 mmol/g) supports. The porous structure of ceramic surface, allowed a better interaction between reactants and –SO3H site in the carbon. Through the FT-IR analysis, it was observed that the functional groups –COOH, –OH, and –SO3H were present in the active sites of the catalysts. The surface areas of glass (Si–SC), ceramic (Ce–SC) and aluminum (Al–SC) catalysts were larger than 1 m2/g, whereas the pore size belongs to macroporous as the average pore size is more than 50 nm. It is also stable within the temperature of 400 °C as there was less than 10% weight loss revealed from the TGA analysis.
[RETRACTED] Simultaneous Elimination of Soot and NOX through Silver-Barium Based Catalytic Materials
Authors: Dhal Ganesh Chandra , Dey Subhashish , Prasad Ram , Mohan Devendra 
Published: February 2017

This article was retracted due to the following reasons. Retraction note here: https://doi.org/10.9767/bcrec.12.2.1202.App.7 RETRACTION TO:Dhal, G.C., Dey, S., Prasad, R., Mohan, D. (2017). Simultaneous Elimination of Soot and NOX through Silver-Barium Based Catalytic Materials. Bulletin of Chemical Reaction Engineering & Catalysis, 12 (1): 71-80 (doi:10.9767/bcrec.12.1.647.71-80)This article has been retracted by Publisher based on the following reason:Letter to Editor from Prof. James J. Spivey (Department of Chemical Engineering, Louisiana State University) who reported that a comparison of this paper with a previously paper published in Catalysis Today (258 (2015) 405-415, doi:10.1016/j.cattod.2015.02.024) shows significant duplication according to analysis by iThenticate shows 73% similarity, which is far more than acceptable. The authors have plagiarized part of the paper that had already published in [Catalysis Today (258 (2015) 405-415, doi:10.1016/j.cattod.2015.02.024)]. Based on clarification via email, Authors of the above paper have admitted their plagiarism to the previously published paper by Catalysis Today.Editor of Bulletin of Chemical Reaction Engineering & Catalysis acknowledged Prof. James J. Spivey due to the valuable Letter to Editor.One of the conditions of submission of a paper for publication in this journal is that authors declare explicitly that their work is original and has not appeared in a publication elsewhere. Re-use of any data should be appropriately cited. As such this article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the journal that this was not detected during the submission process.
Energy flux in 2‐D MHD waveguide in the outer magnetosphere
Authors: Mazur V. A. , Chuiko D. A. 
Published: February 2017

AbstractThe problems of large‐scale wave propagation and amplification in the outer magnetosphere are considered. Kelvin‐Helmholtz (KH) instability growth rate of the magnetospheric waveguide eigenmodes is investigated as a function of a coordinate along the magnetopause. The problem of solar wind MHD wave penetration into the waveguide is investigated for a broad range near Pc3 and Pc5 geomagnetic pulsation frequencies and realistic models of the magnetospheric waveguide. The expression for the waveguide eigenmode energy flux is obtained. This expression includes the effects of external wave penetration and mode amplification due to the KH instability, as well as losses due to dissipation in the vicinity of the Alfven resonance which are incorporated into the growth rate coefficient together with the instability.
Traveling ionospheric disturbances over the United States induced by gravity waves from the 2011 Tohoku tsunami and comparison with gravity wave dissipative theory
Authors: Azeem Irfan , Vadas Sharon L. , Crowley Geoff , Makela Jonathan J. 
Published: February 2017

AbstractThe 11 March 2011 Tohoku earthquake generated a massive tsunami off the Pacific coast of Japan, which launched intense atmospheric gravity waves (AGWs) in the atmosphere. Within the context of this study, the Tohoku tsunami event was unique in the sense that it enabled a rare, controlled experiment for investigating how AGWs are launched, propagate, and dissipate in relation to tsunamis. This tsunami was a long‐lived, rapidly traveling source of a rich spectra of AGWs excited just above the ocean‐atmosphere interface. In this paper we use GPS total electron content (TEC) data from the United States (U.S.) to look for these AGWs in the ionosphere via their signatures as traveling ionospheric disturbances (TIDs). We find a spectrum of TIDs in the TEC data propagating in the direction of the tsunami that last for several hours over the West Coast of the U.S. and as far inland as western Colorado. The observed TIDs have periods that range from 14 to 30 min, horizontal wavelengths that range from 150 and 400 km, and horizontal phase speeds that range from 180 to 260 m/s. We use reverse ray tracing to show that the Tohoku tsunami was likely the source of these TIDs. Using the networks of GPS receivers in the U.S., we map the tsunami‐launched TIDs over the western U.S. and investigate the spectrum of gravity waves enabling an enhanced understanding/verification of the properties of AGWs as a function of the launch angle.
Seasonal dependence of northern high‐latitude upper thermospheric winds: A quiet time climatological study based on ground‐based and space‐based measurements
Authors: Dhadly Manbharat , Emmert John , Drob Douglas , Conde Mark , Doornbos Eelco , Shepherd Gordon , Makela Jonathan , Wu Qian , Niciejewski Rick , Ridley Aaron 
Published: February 2017

AbstractThis paper investigates the large‐scale seasonal dependence of geomagnetically quiet time, northern high‐latitude F region thermospheric winds by combining extensive observations from eight ground‐based (optical remote sensing) and three space‐based (optical remote sensing and in situ) instruments. To provide a comprehensive picture of the wind morphology, data are assimilated into a seasonal empirical vector wind model as a function of season, latitude, and local time in magnetic coordinates. The model accurately represents the behavior of the constituent data sets. There is good general agreement among the various data sets, but there are some major offsets between GOCE and the other data sets, especially on the duskside. The assimilated wind patterns exhibit a strong and large duskside anticyclonic circulation cell, sharp latitudinal gradients in the duskside auroral zone, strong antisunward winds in the polar cap, and a weaker tendency toward a dawnside cyclonic circulation cell. The high‐latitude wind system shows a progressive intensification of wind patterns from winter to equinox to summer. The latitudinal extent of the duskside circulation cell does not depend strongly on season. Zonal winds show a mainly diurnal variation (two extrema) around polar and middle latitudes and semidiurnal variation (four extrema) at auroral latitudes; meridional winds are primarily diurnal at all high latitudes. The strength of zonal winds channeling through the auroral zone on the duskside is strongest in the summer season. The vorticity of the wind pattern increases from winter to summer, whereas divergence is maximum in equinox. In all three seasons, divergence is weaker than vorticity.
Frictional stability‐permeability relationships for fractures in shales
Authors: Fang Yi , Elsworth Derek , Wang Chaoyi , Ishibashi Takuya , Fitts Jeffrey P. 
Published: February 2017

AbstractThere is wide concern that fluid injection in the subsurface, such as for the stimulation of shale reservoirs or for geological CO2 sequestration (GCS), has the potential to induce seismicity that may change reservoir permeability due to fault slip. However, the impact of induced seismicity on fracture permeability evolution remains unclear due to the spectrum of modes of fault reactivation (e.g., stable versus unstable). As seismicity is controlled by the frictional response of fractures, we explore friction‐stability‐permeability relationships through the concurrent measurement of frictional and hydraulic properties of artificial fractures in Green River shale (GRS) and Opalinus shale (OPS). We observe that carbonate‐rich GRS shows higher frictional strength but weak neutral frictional stability. The GRS fracture permeability declines during shearing while an increased sliding velocity reduces the rate of permeability decline. By comparison, the phyllosilicate‐rich OPS has lower friction and strong stability while the fracture permeability is reduced due to the swelling behavior that dominates over the shearing induced permeability reduction. Hence, we conclude that the friction‐stability‐permeability relationship of a fracture is largely controlled by mineral composition and that shale mineral compositions with strong frictional stability may be particularly subject to permanent permeability reduction during fluid infiltration.
Passive acoustic monitoring of bed load discharge in a large gravel bed river
Authors: Geay T. , Belleudy P. , Gervaise C. , Habersack H. , Aigner J. , Kreisler A. , Seitz H. , Laronne J. B. 
Published: February 2017

AbstractSurrogate technologies to monitor bed load discharge have been developed to supplement and ultimately take over traditional direct methods. Our research deals with passive acoustic monitoring of bed load flux using a hydrophone continuously deployed near a river bed. This passive acoustic technology senses any acoustic waves propagated in the river environment and particularly the sound due to interparticle collisions emitted during bed load movement. A data set has been acquired in the large Alpine gravel‐bedded Drau River. Analysis of the short‐term frequency response of acoustic signals allows us to determine the origin of recorded noises and to consider their frequency variations. Results are compared with ancillary field data of water depth and bed load transport inferred from the signals of a geophone array. Hydrophone and geophone signals are well correlated. Thanks to the large network of deployed geophones, analysis of the spatial resolution of hydrophone measurements shows that the sensor is sensitive to bed load motion not only locally but over distances of 5–10 m (10–20% of river width). Our results are promising in terms of the potential use of hydrophones for monitoring bed load transport in large gravel bed rivers: acoustic signals represent a large river bed area, rather than being local; hydrophones can be installed in large floods; they can be deployed at a low cost and provide continuous monitoring at high temporal resolution.
Silica exposure and disease in semi‐precious stone craftsmen, Minas Gerais, Brazil
Authors: Carneiro Ana Paula S. , Braz Nayara F.T. , Algranti Eduardo , Bezerra Olivia M.P.A. , Araujo Natália P.S. , Amaral Eng Hyg Lênio S. , Edmé Jean L. , Sobaszek Annie , Chérot‐Kornobis Nathalie 
Published: February 2017

BackgroundBrazil is an exporter of precious stones and craftsmen often work in poor conditions. We assessed silica‐related diseases among crystal craftsmen and the complexity of its control.MethodsCase‐series including 118 subjects evaluated from 2006 to 2015, based on medical interviews, chest X‐rays, spirometry, and respirable silica samples.ResultsMedian age and length of exposure were 32 and 13 years, respectively. Silicosis, with 1/0 as a threshold, was diagnosed radiologically in 57 individuals (48.3%). Respirable silica concentrations were 0.9–29.3 times greater than the Brazilian occupational exposure limit. A Receiver Operating Characteristic (ROC) curve with the same diagnosis threshold showed best discrimination at a cut point of 12.5 years of exposure, corresponding to 4.85 mg‐y/m3 of cumulative silica exposure. There was a significant decline in FEV1 across radiological and cumulative silica exposure categories. Eleven individuals (9.3%) had mycobacterial diseases at baseline or follow‐up.ConclusionCrystal craftsmen continue to suffer from silicosis, lung function impairment, comorbidity, and death due to silicosis. To date collective protection in some work sheds has not diminished silica levels. Long‐term follow‐up is needed to evaluate further improvements in preventive measures. Am. J. Ind. Med. 60:239–247, 2017. © 2017 Wiley Periodicals, Inc.
Risk of work injury among adolescent students from single and partnered parent families
Authors: Wong Imelda S. , Breslin F. Curtis 
Published: February 2017

BackgroundParental involvement in keeping their children safe at work has been examined in a handful of studies, with mixed results. Evidence has suggested that non‐work injury risk is higher among children from single‐parent families, but little is known about their risk for work‐related injuries.MethodsFive survey cycles of the Canadian Community Health Survey were pooled to create a nationally representative sample of employed 15–19‐year old students (N = 16,620). Multivariable logistic regression estimated the association between family status and work injury.ResultsRisk of work‐related repetitive strains (OR:1.24, 95%CI: 0.69–2.22) did not differ by family type. However, children of single parents were less likely to sustain a work injury receiving immediate medical care (OR:0.43, 95%CI: 0.19–0.96).ConclusionDespite advantages and disadvantages related to family types, there is no evidence that work‐related injury risk among adolescents from single parent families is greater than that of partnered‐parent families. Am. J. Ind. Med. 60:285–294, 2017. © 2017 Wiley Periodicals, Inc.
Molecular detection by active Fano‐sensor
Authors: Tao Yifei , Guo Zhongyi 
Published: February 2017

The optical properties and sensing performances of the molecular sensors based on plasmonic Fano‐resonance (PFR) nanostructures have been numerically investigated in detail. The on‐resonance sensor, in which the Fano‐resonance position is overlapping with the absorption‐band of the detected molecules perfectly, reveals a powerful ability to detect the molecules with a low concentration or thin thickness. By the bias‐modulation of a single‐layer graphene, the Fano‐resonance position of the nanostructures can be tuned effectively. On being modulated properly, the PFR sensor shows an ultrahigh performance because of the unprecedentedly high overlap of the Fano‐resonance position with the absorption‐band of molecules, which is enabling superior signal strength in the molecular detections based on their vibrational fingerprints. Our proposed strategy may enable the development of dynamic sensors and open exciting prospects for bio‐sensing.
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Models for a multimode bosonic tunneling junction
Authors: Fischer David , Wimberger Sandro 
Published: February 2017

We discuss the relaxation dynamics for a bosonic tunneling junction with two modes in the central potential well. We use a master equation description for ultracold bosons tunneling in the presence of noise and incoherent coupling processes into the two central modes. Whilst we cannot quantitatively reproduce the experimental data of the setup reported in [Phys. Rev. Lett. 115, 050601 (2015)], we find a reasonable qualitative agreement of the refilling process of the initially depleted central site. Our results may pave the way for the control of bosonic tunneling junctions by the simultaneous presence of decoherence processes and atom‐atom interaction.
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