bluuebunny/crossref_metadata_2025_split huggingface dataset:
La calidad de la educación superior y la reestructuración del programa de tutoría / The quality of higher education and the restructuring of the tutoring program
Authors: Rodríguez Pérez Ivonne 
Published: September 2017

Para que la educación superior sea parte de la sociedad del conocimiento necesita replantear la forma de enseñar, de manera que genere en los alumnos, aprendizaje autodirigido, educación a lo largo de la vida, y una formación integral. Los altos índices de reprobación y deserción, rezago y bajos índices de eficiencia terminal, son retos que tienen que enfrentar las Instituciones de Educación Superior (IES). Para tratar de disminuir la situación anterior se implementan diversas estrategias, una de ellas es orientar académicamente al alumno, al considerar que los alumnos tienen capacidades y potencialidades propias. Por ello cada estudiante requiere un acompañamiento personalizado, que le proporcione los fundamentos necesarios para tomar mejores decisiones respecto a su formación profesional. La actividad tutorial tiene una especial relevancia, ya que complementa la labor docente. El objetivo de este trabajo fue mejorar la calidad del proceso educativo a través de la atención personalizada a los problemas que intervienen en el desempeño académico de los estudiantes, para de esta manera lograr disminuir los porcentajes de reprobación y deserción. Al considerar lo anterior surge la necesidad de modificar el programa de tutoría con forme a las nuevas necesidades de los estudiantes, así como de una renovación de las estrategias tutoriales. La metodología utilizada fue hacer un diagnóstico de los problemas presentados por los alumnos durante 2016. Con base en los datos recabados se procedió al análisis de estos y se encontró lo siguiente: problemas de tipo académico en diversas áreas del conocimiento, con acento en el área de matemáticas; problemas de hábitos de estudio, de comprensión lectora, administración del tiempo, entre otros. Por ello, fue necesario modificar el programa de tutoría académica, con las estrategias a seguir para atender las necesidades detectadas en los alumnos, modificar la actividad tutorial, dar seguimiento y evaluar las acciones de los tutores.
Cálculo de las constantes cinéticas del proceso de termo inactivación disociativa de la fosfatasa Acida
Authors: Quijano Parra Alfonso , Martínez Ch Oscar Luis Martínez Ch Oscar Luis , Arbeláez Ramirez Luis Fernando 
Published: September 2017

Introducción: La fosfatasa acida es una enzima oligomérica compuesta por dos subunidades y la cinética de termo inactivación de las enzimas diméricas, se realiza en dos etapas y corresponde al mecanismo cinético secuencial de termo inactivación disociativa de un dímero activo, que se disocia reversiblemente en subunidades inactivas.Objetivo: Estudiar el proceso de termo inactivación de la fosfatasa acida a diferentes temperaturas y un pH óptimo de la enzimaMateriales y métodos: Se utilizó un preparado de fosfatasa acida del germen de trigo de la firma Sigma, USA. El sustrato utilizado es el p-nitrofenilfosfato de sodio hexahidratado de la firma Alfa Aesar A Jhonson Mathey Company. La actividad de la fosfatasa acida se determinó por la velocidad inicial de la hidrólisis del p-nitrofenilfosfato de sodio. La cantidad de p-nitrofenol formado se determinó en el espectrofotómetro Genesys 20 a 405 nm. La termo inactivación se llevó a cabo en el buffer de acetato 0.1 M a un pH de 5,5 y valores de temperatura 500C, 550C ,600C y 650CResultados: Se estudió el esquema cinético de termo inactivación de la enzima dimérica -fosfatasa acida que incluye la disociación reversible del dímero activo en monómeros inactivos y la posterior denaturación de los monómeros. Se calculan los parámetros cinéticos característicos de la termo inactivación de una enzima dimérica k1, k-1, kd, Kdis y kaso Conclusiones:1.-Las curvas cinéticas en coordenadas semilogarítmicas de una ecuación de primer orden tienen un punto de quiebre.2.- Los valores de k1 correspondientes a la constante de velocidad de disociación de la fosfatasa ácida que determinan la estructura del dímero, aumentan con la temperatura.3.-La energía de activación de la disociación del dímero a monómero de la fosfatasa acida es de 23,22 KJ/Mol
Influencia de la combustión vehicular en la calidad del aire de Pamplona-Colombia
Authors: Quijano Vargas Mónica Juliana , Melendez Gelvez Ivan 
Published: September 2017

La contaminación del aire por material particulado (PM) se considera un serio problema ambiental debido a la presencia en la atmósfera de materiales peligrosos tales como metales e hidrocarburos aromáticos poli cíclicos (HAP).En los últimos tiempos ha tomado un gran auge en los países del tercer mundo incluida la América Latina, el estudio de la exposición humana a las emisiones de combustión provenientes de las fuentes móviles que circulan con gasolina y diésel que incluyen las partículas finas (PM2.5) y los componentes muta génicos y carcinogénicos como son los HAP. Los HAP son uno de los contaminantes prioritarios del aire debido a sus propiedades extremadamente peligrosas para la salud humana. La materia orgánica presente en los filtros de PM2.5 del aire de Pamplona fue extraída con Diclorometano. Los efectos genotóxicos del material particulado PM2.5 del aire de Pamplona recolectado en una vía de alto tráfico vehicular por la cual circulan vehículos de carga pesada (tractomulas) que funcionan con diésel y vehículos livianos que funcionan con gasolina, fue evaluado mediante el ensayo cometa. Se identificó por cromatografía de gases (FID) un grupo de HAP considerados por la US EPA como contaminantes prioritarios; entre estos tenemos: naftaleno, fluoreno, fenantreno, pireno, benzo[a]antraceno y la mezcla indeno [1,2,3-cd] pireno, dibenzo[a,h]antraceno. Palabras clave: ensayo cometa, genotoxicidad, Benzo(a) antraceno,cromatografía de gases, contaminación del aire.
A funnel shaped pannus formation above the mitral prosthetic valve diagnosed with real time three-dimensional echocardiography
Authors: Ocaklı Ezgi , Baysan Oben , Altuner Tugba , Kocaman Sinan 
Published: September 2017

Prosthetic valve obstruction due to pannus formation can be a life-threatening complication. We showed that real time three dimensional echocardiography has incremental value in diagnosing pannus localization and extent.
MENGGUGAH IDENTITAS KEBANGSAAN MELALUI PUISI
Authors: Darmawati Besse 
Published: September 2017

A good literary works are able to give positive values to human being. This research aims to describe the elements, meaning, and cultural values in the poems that contain positive values for human life. The researcher applies qualitative method through objective and intuitive approaches. The meaning and cultural values of the poems are intuitively gained from the result of the analysis objectively. The data are “Kata Cinta Usia 51”, “Jabatan Yang Hilang” and “Kita Adalah Pemilik Sah Republik Ini.” Objectively, these poems have the themes of belief in worldly life, the excessive mistaken, and the resurrection of life. Intuitively, the meaning of these three poems makes people aware that life is only temporary, so they cannot escape from gratitude, must not feel despair in facing hardships, are not mistaken by the beauty of the world, and strive to achieve a good quality of life. The cultural values of these poems are gratitude, fortitude, faithful, patience, bravery, firmness, and responsibility. These reflect the characters and identities of young generations as their identities, so they are different from other nations, in order to awaken their identity as a dignified Indonesian nation. ABSTRAK Karya sastra yang baik mampu memberi nilai positif terhadap manusia. Penelitian ini bertujuan untuk mendeskripsikan unsur, makna, dan nilai budaya dalam puisi yang bernilai positif bagi kehidupan manusia. Penulis menerapkan metode penelitian deskriptif kualitatif melalui pendekatan objektif dan intuitif. Makna dan nilai budaya dalam puisi secara intuitif diperoleh dari hasil analisis secara objektif. Data adalah puisi “Kata Cinta Usia 51,” “Jabatan Yang Hilang,” dan “Kita Adalah Pemilik Sah Republik Ini.” Secara objektif, puisi tersebut bertemakan keyakinan terhadap kehidupan duniawi, kekeliruan yang berlebihan, dan kebangkitan hidup. Secara intuitif, makna ketiga puisi tersebut menyadarkan manusia bahwa hidup hanya sementara sehingga tidak terlepas dari rasa syukur, jangan putus asa menghadapi cobaan, jangan keliru dengan keindahan dunia, dan berjuang mencapai kehidupan yang berkualitas. Adapun nilai budaya dari puisi tersebut adalah kesyukuran, ketabahan, keyakinan, kesabaran, keberanian, keteguhan, dan bertanggung jawab. Hal demikian mencerminkan karakter dan identitas anak bangsa sebagai jati diri mereka, sehingga berbeda dengan bangsa lain, dalam rangka menggungah identitas sebagai bangsa Indonesia yang bermartabat.
Analyse juridique de la relation entre stress et harcèlement
Authors: Deharo Gaëlle , Point Sébastien 
Published: September 2017

L’objectif de cette contribution est d’identifier les frontières entre les notions de « stress » et de « harcèlement » du point de vue juridique. L’analyse se fonde sur 59 arrêts de la Cour de cassation. Les résultats montrent que le stress est insuffisant pour caractériser un harcèlement moral et doit être corroboré par d’autres éléments : modifications de l’organisation du travail, anormalité du stress, dégradation de l’état de santé ou relations stressantes. Cette étude permet d’éclairer le manager sur la gestion des risques de condamnations que représentent ces situations souvent confuses et ambiguës.
Progression of trunk imbalance in adolescent idiopathic scoliosis with a thoracolumbar/lumbar curve: is it predictable at the initial visit?
Authors: Hwang Chang Ju , Lee Choon Sung , Lee Dong-Ho , Cho Jae Hwan 
Published: September 2017

OBJECTIVEProgression of trunk imbalance is an important finding during follow-up of patients with adolescent idiopathic scoliosis (AIS). Nevertheless, no factors that predict progression of trunk imbalance have been identified. The purpose of this study was to identify parameters that predict progression of trunk imbalance in cases of AIS with a structural thoracolumbar/lumbar (TL/L) curve.METHODSThis study included 105 patients with AIS and a structural TL/L curve who were followed up at an outpatient clinic. Patients with trunk imbalance (trunk shift ≥ 20 mm) at the initial visit were excluded. All patients were followed up for more than 2 years. Patients were divided into the following groups according to progression of trunk imbalance: 1) Group P, trunk shift ≥ 20 mm at the final visit and degree of progression ≥ 10 mm; and 2) Group NP, trunk shift < 20 mm at the final visit or degree of progression < 10 mm. Radiological parameters included Cobb angle, upper end vertebrae and lower end vertebrae (LEV), LEV tilt, disc wedge angle between LEV and LEV+1, trunk shift, apical vertebral translation, and apical vertebral rotation (AVR). Each parameter was compared between groups. Radiological parameters were assessed at every visit using whole-spine standing anteroposterior radiographs.RESULTSAmong the 105 patients examined, 13 showed trunk imbalance with progression ≥ 10 mm at the final visit (Group P). Multivariate logistic regression analysis identified a lower Risser grade (p = 0.002) and a greater initial AVR (p = 0.020) as predictors of progressive trunk imbalance. A change in LEV tilt during follow-up was associated with trunk imbalance (p = 0.001).CONCLUSIONSRisser grade and AVR measured at the initial visit may predict progression of trunk imbalance. Surgeons should consider the risk of progressive trunk imbalance if patients show skeletal immaturity and a greater AVR at the initial visit.
Resilience in a Mountain Range: The Case of the Tadrart Acacus (Southwest Libya)
Authors: Biagetti Stefano 
Published: September 2017

Abstract
Between 2003-2011, a research programme in southwest Fazzan (Libya) aimed at understanding the resilience of the Kel Tadrart Tuareg, currently inhabiting the Acacus Mts. Using a multi-pronged approach featuring oral interviews, participant observation, mapping of settlements and localisation of natural resources, the Kel Tadrarts' interaction with the landscape was investigated, and traditional (local) ecological knowledge turned out to be a key factor in the successful adaptation of the Kel Tadrart to erratic rainfall and meagre pastures. The study of Kel Tadrart resilience has fostered new interpretation of the recent past of the region, developed under the framework of the Theory of Resilience.
A Tale of Two Games:
Cirit
,
Buzkashi
and the Horsemen of the Asiatic Steppe
Authors: Willekes Carolyn 
Published: September 2017

Abstract

The horse has been an essential component to life on the Asiatic steppe since its domestication c. 5,500 years ago. The importance of the horse to these nomadic peoples can be seen not only in the portrayal of equines in both art and literature, as well as their presence in the archaeological record, but also through their role in the daily life of these horse cultures. This is particularly apparent in the significance of traditional horse sports to the nomads of the region. This article examines two of these 'folk' competitions:
cirit
and
buzkashi
.
Relaxation near Supermassive Black Holes Driven by Nuclear Spiral Arms: Anisotropic Hypervelocity Stars, S-stars, and Tidal Disruption Events
Authors: Hamers Adrian S. , Perets Hagai B. 
Published: September 2017

Abstract
Nuclear spiral arms are small-scale transient spiral structures found in the centers of galaxies. Similarly to their galactic-scale counterparts, nuclear spiral arms can perturb the orbits of stars. In the case of the Galactic center (GC), these perturbations can affect the orbits of stars and binaries in a region extending to several hundred parsecs around the supermassive black hole (SMBH), causing diffusion in orbital energy and angular momentum. This diffusion process can drive stars and binaries to close approaches with the SMBH, disrupting single stars in tidal disruption events (TDEs), or disrupting binaries, leaving a star tightly bound to the SMBH and an unbound star escaping the galaxy, i.e., a hypervelocity star (HVS). Here, we consider diffusion by nuclear spiral arms in galactic nuclei, specifically the Milky Way GC. We determine nuclear-spiral-arm-driven diffusion rates using test-particle integrations and compute disruption rates. Our TDE rates are up to 20% higher compared to relaxation by single stars. For binaries, the enhancement is up to a factor of ∼100, and our rates are comparable to the observed numbers of HVSs and S-stars. Our scenario is complementary to relaxation driven by massive perturbers. In addition, our rates depend on the inclination of the binary with respect to the Galactic plane. Therefore, our scenario provides a novel potential source for the observed anisotropic distribution of HVSs. Nuclear spiral arms may also be important for accelerating the coalescence of binary SMBHs and for supplying nuclear star clusters with stars and gas.
The JCMT BISTRO Survey: The Magnetic Field Strength in the Orion A Filament
Authors: Pattle Kate , Ward-Thompson Derek , Berry David , Hatchell Jennifer , Chen Huei-Ru , Pon Andy , Koch Patrick M. , Kwon Woojin , Kim Jongsoo , Bastien Pierre , Cho Jungyeon , Coudé Simon , Di Francesco James , Fuller Gary , Furuya Ray S. , Graves Sarah F. , Johnstone Doug , Kirk Jason , Kwon Jungmi , Lee Chang Won , Matthews Brenda C. , Mottram Joseph C. , Parsons Harriet , Sadavoy Sarah , Shinnaga Hiroko , Soam Archana , Hasegawa Tetsuo , Lai Shih-Ping , Qiu Keping , Friberg Per 
Published: September 2017

Abstract
We determine the magnetic field strength in the OMC 1 region of the Orion A filament via a new implementation of the Chandrasekhar–Fermi method using observations performed as part of the James Clerk Maxwell Telescope (JCMT) B-Fields In Star-forming Region Observations (BISTRO) survey with the POL-2 instrument. We combine BISTRO data with archival SCUBA-2 and HARP observations to find a plane-of-sky magnetic field strength in OMC 1 of

mG, where

mG represents a predominantly systematic uncertainty. We develop a new method for measuring angular dispersion, analogous to unsharp masking. We find a magnetic energy density of

J m−3 in OMC 1, comparable both to the gravitational potential energy density of OMC 1 (∼10−7 J m−3) and to the energy density in the Orion BN/KL outflow (∼10−7 J m−3). We find that neither the Alfvén velocity in OMC 1 nor the velocity of the super-Alfvénic outflow ejecta is sufficiently large for the BN/KL outflow to have caused large-scale distortion of the local magnetic field in the ∼500 yr lifetime of the outflow. Hence, we propose that the hourglass field morphology in OMC 1 is caused by the distortion of a primordial cylindrically symmetric magnetic field by the gravitational fragmentation of the filament and/or the gravitational interaction of the BN/KL and S clumps. We find that OMC 1 is currently in or near magnetically supported equilibrium, and that the current large-scale morphology of the BN/KL outflow is regulated by the geometry of the magnetic field in OMC 1, and not vice versa.
A Multi-band Study of the Remarkable Jet in Quasar 4C+19.44
Authors: Harris D. E. , Lee N. P. , Schwartz D. A. , Siemiginowska A. , Massaro F. , Birkinshaw M. , Worrall D. M. , Cheung C. C. , Gelbord J. M. , Jorstad Svetlana G. , Marscher Alan P. , Landt H. , Marshall H. , Perlman E. S. , Stawarz L. , Uchiyama Y. , Urry C. M. 
Published: September 2017

Abstract
We present arcsecond-resolution data in the radio, IR, optical, and X-ray for 4C+19.44 (=PKS 1354+195), the longest and straightest quasar jet with deep X-ray observations. We report results from radio images with half to one arcsecond angular resolution at three frequencies, plus Hubble Space Telescope and Spitzer data. The Chandra data allow us to measure the X-ray spectral index in 10 distinct regions along the 18″ jet and compare with the radio index. The radio and X-ray spectral indices of the jet regions are consistent with a value of

throughout the jet, to within

uncertainties. The X-ray jet structure to the south extends beyond the prominent radio jet and connects to the southern radio lobe, and there is extended X-ray emission, both in the direction of the unseen counter-jet, and also coincident with the northern radio lobe. This jet is remarkable because its straight appearance over a large distance allows the geometry factors to be taken as fixed along the jet. Using the model of inverse Compton scattering of the cosmic microwave background (iC/CMB) by relativistic electrons, we find that the magnetic field strengths and Doppler factors are relatively constant along the jet. If instead the X-rays are synchrotron emission, they must arise from a population of electrons distinct from the particles producing the radio synchrotron spectrum.
Rapid X-Ray Variations of the Geminga Pulsar Wind Nebula
Authors: Hui C. Y. , Lee Jongsu , Kong A. K. H. , Tam P. H. T. , Takata J. , Cheng K. S. , Ryu Dongsu 
Published: September 2017

Abstract
A recent study by Posselt et al. reported the deepest X-ray investigation of the Geminga pulsar wind nebula (PWN) by using Chandra X-ray Observatory. In comparison with previous studies of this system, a number of new findings have been reported, and we found that these suggest the possible variabilities in various components of this PWN. This motivates us to carry out a dedicated search for the morphological and spectral variations of this complex nebula. We have discovered variabilities on timescales from a few days to a few months from different components of the nebula. The fastest change occurred in the circumstellar environment at a rate of 80% of the speed of light. One of the most spectacular results is the wiggling of a half light-year long tail as an extension of the jet, which is significantly bent by the ram pressure. The jet wiggling occurred at a rate of about 20% of the speed of light. This twisted structure could possibly be a result of a propagating torsional Alfv́en wave. We have also found evidence of spectral hardening along this tail for a period of about nine months.
Le rôle des Technologies de l’Information et de la Communication dans la dynamique d’un réseau d’innovation : une approche ANT
Authors: Fuhrer Chantal , Hoareau Émilie , Cucchi Alain 
Published: September 2017

L’objectif de cette étude est de mieux comprendre la dynamique d’un réseau d’innovation et plus particulièrement le rôle des Technologies de l’Information et de la Communication (TIC) dans cette dynamique. Une approche Actor-Network Theory (ANT) est mobilisée. Le terrain d’investigation, QualiREG 1 , est un réseau d’innovation unissant les acteurs de territoires de l’Océan Indien. L’analyse des témoignages des acteurs montre que les TIC interviennent différemment tout au long du cycle. Ainsi les Technologies de l’Information (TI) et le face-à-face permettent l’exploration de l’environnement et la mobilisation des ressources des innovateurs. Les Technologies de la Communication (TC) activent le lien qui les unit. Des recherches supplémentaires sont nécessaires avant de généraliser les résultats de cette étude de cas. Néanmoins, elle apporte une approche complémentaire autour du débat sur les liens entre l’innovation et la technologie. Codes JEL : M, O
Development of kairomone-based lures and traps targeting Spilonota ocellana (Lepidoptera: Tortricidae) in apple orchards treated with sex pheromones
Authors: Judd Gary J.R. , Knight Alan. L. , El-Sayed Ashraf M. 
Published: September 2017

AbstractSpilonota ocellana (Denis and Schiffermüller) (Lepidoptera: Tortricidae) can be a serious pest of organic apples (Malus domestica Borkhausen (Rosaceae)) in British Columbia, Canada. Recent discovery that S. ocellana moths are attracted by a lure combining acetic acid (AA) and benzyl nitrile (BN), identified as a caterpillar-induced apple leaf volatile, provides an opportunity to develop bisexual mass-trapping or monitoring systems. Sticky white delta traps baited with benzyl nitrile (10 mg/red rubber septum) and an acetic-acid co-lure (3 mL AA/3-mm open 8-mL vial) caught significantly more moths than either component alone. Acetic-acid co-lures were weakly attractive but benzyl-nitrile-loaded septa were not attractive. Moth catches with AA+BN lures were unaffected by the size and type of rubber septum used to release benzyl nitrile, but catches increased with increasing loads of benzyl nitrile. Male and total moth catches were maximised using membrane release devices loaded with a mixture of benzyl nitrile and a second caterpillar-induced volatile, 2-phenylethanol (PET), in combination with an acetic-acid co-lure (AA+BN-PET). Female catches with AA+BN-PET and AA+BN lures were equivalent. Placing AA+BN lures in traps baited with female sex pheromone lures reduced male catches, but female catches were unchanged. When sticky liners were replaced weekly, white delta traps baited with AA+BN lures caught more moths than similarly baited white Multipher®-I bucket traps, or transparent UnitrapsTM. Multipher-I traps with a propylene glycol killing agent (250 mL) caught more moths than those with Vapona insecticide strips. In apple orchards treated with mating disruption sex pheromones, traps baited with AA+BN caught slightly more total moths than traps baited with sex pheromone. Weekly, total male+female moth catches with either AA+BN or sex pheromone lures showed similar seasonal patterns in both untreated and pheromone-disrupted orchards, respectively. Long-lasting release devices and an organic killing agent are needed to develop certified organic mass-trapping technologies for management of S. ocellana with the AA+BN kairomone.