bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Effect of MHD on a Longitudinal Flow of a Fractional Maxwell Fluid between Two Coaxial Cylinders
Authors: Et al. Murad 
Published: March 2020

In this paper fractional Maxwell fluid equation has been solved. The solution is in the Mettag-Leffler form. For the corresponding solutions for ordinary Maxwell fluid are obtained as limiting case of general solutions. Finally, the effects of different parameters on the velocity and shear stress profile are analyzed through plotting the velocity and shear stress profile.
Symmetric and Positive Definite Broyden Update for Unconstrained Optimization
Authors: Et al. Mahmood 
Published: March 2020

Broyden update is one of the one-rank updates which solves the unconstrained optimization problem but this update does not guarantee the positive definite and the symmetric property of Hessian matrix.
In this paper the guarantee of positive definite and symmetric property for the Hessian matrix will be established by updating the vector which represents the difference between the next gradient and the current gradient of the objective function assumed to be twice continuous and differentiable .Numerical results are reported to compare the proposed method with the Broyden method under standard problems.
PWRR Algorithm for Video Streaming Process Using Fog Computing
Authors: Et al. Hassan 
Published: March 2020

The most popular medium that being used by people on the internet nowadays is video streaming. Nevertheless, streaming a video consumes much of the internet traffics. The massive quantity of internet usage goes for video streaming that disburses nearly 70% of the internet. Some constraints of interactive media might be detached; such as augmented bandwidth usage and lateness. The need for real-time transmission of video streaming while live leads to employing of Fog computing technologies which is an intermediary layer between the cloud and end user. The latter technology has been introduced to alleviate those problems by providing high real-time response and computational resources near to the client at the network boundary. The present research paper proposes priority weighted round robin (PWRR) algorithm for streaming operations scheduling in the fog architecture. This will give preemptive for streaming live video request to be delivered in a very short response time and real-time communication. The results of experimenting the PWRR in the proposed architecture display a minimize latency and good quality of live video requests which has been achieved with bandwidth changes as well as meeting all other clients requests at the same time
Gestión del talento humano en micro, pequeñas y medianas empresas de servicios en Colombia: aproximaciones a un modelo de diagnóstico organizacional
Authors: Pantoja-Kauffmann Gabriela 
Published: March 2020

Rev.esc.adm.neg
El presente artículo pretende establecer una reflexión sobre el estado del arte de la gestión del talento humano para micro, pequeñas y medianas empresas —mipymes— en Colombia, en el contexto de la elaboración de un modelo de diagnóstico organizacional del sector servicios y a partir de la investigación documental sobre las prácticas de gestión del talento humano del grupo de investigación de la Facultad de Ciencias Económicas y Administrativas de la Universidad de San Buenaventura con sede en Bogotá. En este escrito se busca establecer una aproximación a un modelo de diagnóstico organizacional con el fin de determinar la contribución de las áreas de gestión del talento humano en mipymes, a partir de los componentes de un modelo de gestión humana que mide la propuesta de valor de las áreas de gestión del talento en empresas colombianas; entendiendo que la gestión del talento humano en las organizaciones que agrega valor a la operación del negocio es aquella por la cual se logra trascender los asuntos operativos y contingentes del día a día y aportar a la toma de decisiones estratégicas en función de la comprensión de los mercados empresariales. Así pues, se concluye que en las mipymes colombianas las áreas de gestión del talento humano pueden erigirse como una herramienta movilizadora de recursos internos y en fuente de ventaja competitiva, en la medida en que se integren, de forma entrelazada, en el propósito de generar valor en la organización como un sistema integral.
El alcance de las prácticas de dirección en la vida de los colaboradores: la relación entre la percepción de justicia y el conflicto trabajo-familia en las organizaciones del sur colombiano
Authors: Andrade-Navia Juan Manuel , Ramírez-Plazas Elías , Rueda-Ramírez Humberto 
Published: March 2020

Rev.esc.adm.neg
El presente estudio evalúa la relación entre la justicia organizacional, en sus dimensiones de justicia procedimental y justicia interaccional, y el conflicto trabajo-familia en las empresas colombianas. La investigación fue de carácter explicativo-causal y con el fin de evaluar las relaciones y los efectos entre las variables se utilizó un modelo de ecuaciones estructurales. La investigación se realizó en tres organizaciones pertenecientes a diferentes sectores económicos —servicios, financiero y producción—, en las que se aplicaron 450 encuestas a sus empleados. En cuanto a los resultados, se obtuvo que solo la justicia interaccional presenta una relación negativa y significativa con el conflicto trabajo-familia; la relación justicia procedimental y conflicto trabajo-familia fue no significativa, además de positiva. Esta investigación y sus resultados respaldan la hipótesis de que el crecimiento empresarial, de la mano del bienestar del capital humano, depende de factores clave como la disminución de los conflictos de los empleados y la capacitación de los jefes o supervisores mediante estrategias de liderazgo transformacional que den cuenta de la justicia organizacional y de la participación activa de todos los actores, para fomentar así, relaciones y entornos laborales en los que prevalezcan valores fundamentales como el respeto, la honestidad, la dignidad y la cortesía.
Educación corporativa: análisis del índice de contribuciones y desarrollo de competencias organizacionales
Authors: Lago Attadia Galli Lesley Carina do , Aparecida Prates Glaucia , Aline Melenchon Caroline , Silva Patrícia Andrea da , Altafin Galli Rafael 
Published: March 2020

Rev.esc.adm.neg
Las organizaciones se encuentran involucradas en constantes cambios y buscan implementar estrategias que les permitan enfrentar los nuevos desafíos que generan, sobre todo, la globalización y la competitividad, centrados en el poder del conocimiento. El objetivo de este artículo es mapear las contribuciones de la educación corporativa en la formación y el desarrollo de las competencias de los colaboradores de una organización del sector bancario. Para la realización de este trabajo se optó por una muestra no probabilística y por conveniencia. El cuestionario se aplicó en trabajadores del Banco ALFA de las ciudades de Ribeirão Preto, Jaboticabal e Itu, de Brasil. Lo contestaron 200 funcionarios en total. De esta manera, fue posible concluir que los participantes concuerdan, parcialmente, en que el banco valora los funcionarios que buscan entrenamiento, por tanto, para ellos poseer capacitaciones no es un diferencial profesional frente a otro colaborador que no los posea. Sin embargo, el análisis de los resultados evidenció que es esencial un mayor incentivo a la participación en los programas o cursos financiados por el banco; pues queda clara la importancia y la necesidad de una adecuada implementación de procesos de educación corporativa, pues esta se presenta como un pilar fundamental para una gestión empresarial exitosa.
La administración estratégica en la calidad de la industria del vestido de Puebla, México
Authors: Burguete-Garcia Mario Antonio , Romero y Cejudo Enrique Darío , Acle-Mena Ramón 
Published: March 2020

Rev.esc.adm.neg
El objetivo de la investigación fue demostrar la relación entre la administración estratégica y la calidad en las micros, pequeñas y medianas empresas de la industria del vestido en Puebla, México. Esta investigación contribuye con conocimiento al reforzar la teoría según la cual la calidad es un problema de productividad y competitividad para las empresas. Los resultados que se muestran pertenecen a una investigación positivista, de revisión documental y de aplicación, con un estudio de campo sobre un modelo que permite determinar la relación entre la administración estratégica y la calidad en las empresas, respaldado por un coeficiente de correlación de 0,6500 y un nivel de significancia del 5 %. De forma práctica se usaron los conceptos de «calidad» y «administración estratégica» en la industria del vestido. Finalmente, el análisis de los resultados concluye que existe una relación positiva moderada entre la variable administración estratégica y la variable calidad en la industria del vestido en Puebla, pues queda claro que si se realiza un buen diagnóstico con un buen análisis interno y externo, que optimice estas variables de manera efectiva, será posible generar objetivos y estrategias que permitan mejorar la productividad y obtener ventajas competitivas frente a los otros mercados.
Caracterización cultural de tres organizaciones productivas indígenas de Toribío, Cauca
Authors: Vásquez-Rivera Oscar Iván 
Published: March 2020

Rev.esc.adm.neg
Esta investigación tiene por objetivo analizar los rasgos culturales de tres organizaciones productivas indígenas del municipio de Toribío, en el departamento del Cauca, Colombia. La investigación se realizó mediante una metodología cualitativa basada en la etnografía organizacional y el análisis de categorías culturales emergentes. Dentro de los resultados se presentan puntos de convergencia cultural que han sido institucionalizados a partir del contexto y las características del entorno, propias de las comunidades y la etnia a la que pertenecen las tres organizaciones. Existen rasgos culturales que presentan similitud entre las tres unidades de análisis, tales como el lenguaje, las leyendas, los mitos, los héroes, las creencias, la religión, las mingas, las relaciones interpersonales, las relaciones laborales, las normas, las políticas, las reglas, la organización formal, la relación con las partes interesadas, las costumbres y la organización informal. Sin embargo, existen puntos de divergencia cultural relacionados con los supuestos básicos, los valores, la simbología, la infraestructura, el ambiente de trabajo, la proyección social y el liderazgo, los cuales se constituyen como el producto de las características internas de las organizaciones y la forma en la que estas se han desarrollado con el paso de los años. El estudio concluye que la manera en la que se materializan, realizan y simbolizan las características culturales difiere para cada organización, al ser unas más indígenas-tradicionales y otras más occidentales-modernas.
WITHDRAWN: Age-related changes of neutrophil characteristics, potential of activation, DNA release and NET formation
Authors: Krall Moritz , Mauracher Lisa-Marie , Roiss Johanna , Hell Lena , Ondracek Anna S , Gebhart Johanna , Brostjan Christine , Ay Cihan , Pabinger Ingrid 
Published: March 2020

Abstract
Background: Neutrophils are a heterogeneous population of leukocytes, which can be subdivided into high and low density neutrophils (HDNs/LDNs). They are known to fight intruders with different mechanisms, including the release of neutrophil extracellular traps (NETs), which have also been associated with thrombosis. Risk of both, thrombosis and infections, increase with age. Differences in neutrophil subpopulations and functionality have been shown in various disease states, but investigations in healthy subjects and their dependence on age are lacking. The aim of this study was to investigate age-related changes in neutrophils regarding neutrophil subpopulations, their potential of activation, DNA release and NET formation. Methods: Neutrophil subpopulations (HDNs and LDNs) were isolated from 25 healthy individuals subdivided into 3 groups (<45 years, n=8; 45-54, n=9; >54, n=8). Neutrophil characteristics, potential of activation and the ability of NET formation were investigated using flow cytometry. Externalisation of DNA was detected by a DNA release assay. Results: HDN and LDN counts did not differ between age-groups. However, with increasing age we observed a shift in neutrophil subpopulations towards a lower amount of mature LDNs, characterized by their expression of membrane receptors CD62L and CD16. Upon stimulation, neutrophils of older individuals showed significantly higher release of DNA. NET formation was associated with increasing age. HDNs of younger participants increased activation markers (CD66b and CD11b) to a higher extent compared to those of older individuals. Conclusion: Neutrophils and their ability of activation, DNA release and NET formation change with age and this might contribute to the higher risk of infection and thrombosis at advanced age. Furthermore, these results highlight the importance and necessity of age-matching in studies that focus on neutrophil characteristics.
Significance and characteristics of Dexmedetomidine or Propofol-induced segmental electroencephalogram power spectra
Authors: Zhou Mao , Wen Jing , Peng Jun , Zhi Zhiyi , Peng Shuling 
Published: March 2020

Abstract
Background: Although the electroencephalogram patterns induced by dexmedetomidine and propofol are relatively similar, these drugs may have different molecular targets and involvement of distinct neural circuit dynamics in their effects. Our aim was to identify special neurophysiology signatures induced by these drugs.Methods: Forty seven patients receiving combined spinal epidural anesthesia (CSEA）were randomly divided into two groups: Dexmedetomidine group (D group, n = 24) and Propofol group (P group, n = 23). Dexmedetomidine at 1 μg/kg was administered intravenously in 10 min, then adjusted to a rate of 0.5 μg/kg/h and withheld if Ramsey sedation scale (RSS) reached 4 - 5. Propofol was given via a computer-controlled infusion to target a concentration of 0.5 μg/mL at the effect site and then to gradually increase the concentration 0.5 μg/mL every 5 min until satisfactory sedation was achieved. The vital signs, segmental Narcotrend EEG power spectra and arterial blood analysis results were recorded before sedation, and 0, 5, 10 and 15 min after drug administration ended.Results: After satisfactory sedation was achieved (RSS 4 - 5), propofol sedation was characterized with alpha wave, and dexmedetomidine sedation was characterized with theta wave.; After drug administration ended, relative power in alpha and beta waves of P group was higher than D group（P＜0.05); However, when patients were croused or patted on their shoulders, relative power in alpha, beta and theta was increased（P＜0.05) and relative power in delta wave was decreased（P＜0.05）in D group; The percentages of alpha and theta power were decreased gradually at drug withdrawal, 5min, 10min, 15min after drug administration ended; Narcotrend data have a good correlation with propofol sedation depth compared with the traditional sedation score.Conclusion: Distinct EEG patterns are induced by propofol and dexmedetomidine. Since patients sedated with dexmedetomidine may be easier to be waked up than those with propofol, this phenomenon may be associated with the lower alpha power percentage, a more easily blocked alpha wave and a higher excitability of delta wave under dexmedetomidine sedation.
Molecular Characterization of Carbapenemase-Producing Escherichia coli and Salmonella in children with diarrhea in rural Burkina Faso.
Authors: DEMBELE Rene , Konaté Ali , Soulama Issiaka , Kaboré Wendpoulomdé A. D. , Kagambèga Assèta , N'Golo David Coulibaly , Traoré Oumar , Seck Abdoulaye , Traoré Alfred S. , Guessennd Nathalie K. , Gassama-Sow Amy , Barro Nicolas 
Published: March 2020

Abstract
Background In recent years, Carbapenemase-producing Enterobacteriaceae (CPE) resistance to antibiotics has dramatically increased leading to limitations of their treatment options. In the present study, we investigated the occurrence of carbapenemase-producing Escherichia coli and Salmonella in rural Burkina Faso, using bacterial strains obtained from previous studies. Results Diarrheagenic Escherichia coli (DEC) strains was identified using 16-plex Polymerase Chain Reaction (PCR), whereas antibiotic susceptibility was realized using the disk diffusion method. Furthermore, multiplex PCR assays were used to characterize bla KPC, bla VIM and bla IMP genes in carbapenemase-producing E . coli and Salmonella . The study highlighted high resistance rates of the identified bacteria to common antibiotics. Likewise, two strains of E . coli were imipenem resistant with Carbapenemase-encoding genes. The genes detected were Klebsiella pneumoniae carbapenemase (KPC), Verona integrin-encoded metallo-β-lactamase (VIM) and Imipenemase (IMP-2) reaching a rate of 40% each. However, no Carbapenemase-encoding genes were detected in Salmonella isolates. Conclusions This study showed that for a real-time infection control and prompt application of antimicrobial chemotherapy, characterization of carbapenemase-producing Enterobacteriaceae in patients is crucial.
Analysis of small nucleolar RNAs (snoRNAs) associated co-expression and construction of ceRNA regulatory networks in esophageal carcinoma
Authors: Jiang Haigen , Zhuang Jing , Yang Xi , Wu Wei , Dai Siqi , Qi Quang , Han Shuwen 
Published: March 2020

Abstract
Purpose: This study aimed to investigate the role of small nucleolar RNAs (snoRNAs) and their host genes (SNHGs) in tumorigenesis and progression of esophageal carcinoma (EC).Methods: RNA-seq data and clinical information for EC patients were obtained from The Cancer Genome Atlas database. Differentially expressed snoRNAs (DE-snoRNAs) and SNHGs (DE-SNHGs) between EC samples and normal controls were screened with the edgeR package, followed by the trend analysis with STEM. Survival analysis was performed using the Kaplan–Meier method with the log-rank test. Screening of co-expressed genes and functional enrichment analyses were performed with Pearson’s correlation analysis and enrichment analysis, respectively. Lastly, the co-expression and ceRNA networks were constructed.Results: A total of 19 DE-snoRNAs and nine DE-SNHGs were screened between EC samples and normal controls. Moreover, two snoRNA clusters related to the clinic stage were analyzed through trend analysis. Survival analysis results demonstrated that SNORA70D was significantly associated with the overall survival of EC patients (P=0.034). In addition, a co-regulation network that included six snoRNAs and 29 mRNAs was constructed. A ceRNA network comprised of five SNHGs, 11 mRNAs, and 38 miRNAs was constructed based on the top 50 relationship pairs. KEGG pathway enrichment analysis revealed that SNORA14B, SNORA47, SNORA71C, SNORD12B, and SNORD14E in the co-expression network were mainly enriched in the NOD−like receptor signaling pathway, and neuroactive ligand−receptor interaction pathway. SNHG23, SNHG3, SNHG17, SNHG4, and SNHG8 in the ceRNA regulation network were mainly enriched in calcium signaling pathway, cytokine−cytokine receptor interaction, and the extracellular matrix−receptor interaction pathway.Conclusion: The data revealed a series of snoRNAs, SNHGs, and pathways involved in EC carcinogenesis, which will provide a basis for understanding the underlying molecular mechanism of EC development.
Association between agr group, genetic background, virulence factors and disease types of Staphylococcus aureus isolated from Chinese children
Authors: Xu Yan , Qian Suyun , Yao Kaihu , Dong Fang , Song Wenqi , Sun Chen , Yang Xin , Zhen Jinghui , Liu Xiqing , Lv Zhiyong , Yang Xi 
Published: March 2020

Abstract
Background Staphylococcus aureus (S. aureus) accessory gene regulator (agr) system plays a critical role in staphylococcal pathogenesis. Our study aimed to investigate the relationship between agr group, the genetic background, virulence genes and disease types distribution of S. aureus isolated from different clinical sources among Chinese children.Methods S. aureus strains were isolated from Beijing Children’s hospital from October 2017 to October 2019. Isolates were typed by multilocus sequence typing (MLST), staphylococcal protein A (spa), agr, and staphylococcal cassette chromosome mec (SCCmec) typing (for methicillin-resistant S. aureus [MRSA] isolates). Furthermore, all isolates were tested for the presence of 19 selected virulence genes.Results A total of 191 non-repetitive S. aureus clinical isolates were collected and the agr type I was the most prevalent (84.8%). S. aureus isolates were divided into 33 sequence types (STs), 20 clonal complexes (CCs) and 59 spa types, ST59 (39.8%) and t437 (37.7%) were the predominant types. CC59, CC25, CC22, CC951, CC8, and CC398 isolates possessed agr group I; CC15 isolates harbored agr group II; CC30 strains were characterized as agr group III, and CC121 harbored agr group IV. Of the 19 virulence genes, the tst gene was more prevalent among agr group III compared to other groups (p = 0.006); eta and etb genes were more prevalent among agr group IV than other groups (p = 0.003 and 0.001, respectively); nearly all strains that harbored the lukS/F-PV gene (98.3%) belonged to agr group I (p = 0.004); the frequencies of bbp and ebpS genes belonged to agr group I were statistically lower than that of other groups (p < 0.001). Among 161 diagnoses, the frequency of strains from cellulitis patient harbored agr group III was higher than that of other groups (p = 0.046), and one strain isolated from staphylococcal scalded skin syndrome (SSSS) patient, which was identified as agr type IV (p = 0.021).Conclusions The results indicated that the S. aureus agr type was linked to the genetic background. Besides, a possible relationship between the agr group, several virulence determinants, and specific disease types was observed.
Khat chewing practice and associated factors among medical students in university of Gondar, Ethiopia, 2019: a cross-sectional study
Authors: Birhan Tsegaye Adane , Worku Walelegn , Azanaw Jember , Yohannes Lamrot 
Published: March 2020

Abstract
Background: Globally, khat chewing practice becoming an alarming and common among the youth generation especially in higher educational institutions. It may also leads to frequent misbehavior, poor academic performance and memory impairment among students. This study aimed to determine the prevalence of khat chewing and associated factors among medical students in University of Gondar, Northwest Ethiopia, 2019.Method: An institution-based cross-sectional study was employed on 422 medical students. Data were collected using a self-administered questionnaire and analyzed using SPSS 20 software. Stratified followed by random sampling was employed to select the samples. Multivariable logistic regression model was fitted to identify the predictors. P ≤ 0.05 was used to select statistically significant factors.Result: The current prevalence of khat chewing among medical students was 21.5%. The odds of khat chewing was higher among males [AOR=3.353; 95%CI (1.460-7.701)], Muslims [AOR=6.390; 95%CI (1.903-21.460)], fifth and six year students [AOR= 3.391; 95%CI (1.354-8.488)], smokers [AOR=5.081; 95%CI (1.898-13.601)], alcohol users [AOR=4.872; 95%CI (2.094-11.332)], students who had khat chewer close friends [AOR=30.645; 95%CI (12.261-76.589)].Conclusion: Since a significant proportion of students chew khat, continuous awareness creation on the impact of khat chewing and counseling services are recommended.