bluuebunny/crossref_metadata_2025_split huggingface dataset:
Redes inteligentes en el sistema eléctrico colombiano: Revisión de tema
Authors: Giral Ramírez William Mauricio , Celedón Flórez Hugo José , Galvis Restrepo Eduard , Zona Ortiz Angela Tatiana 
Published: April 2019

Contexto: el presente artículo realiza un análisis funcional de las redes eléctricas inteligentes con el propósito de establecer un marco de referencia, el cual permita identificar las principales características del sistema actual de interconexión eléctrica en Colombia. Asimismo, se presentan los incentivos propuestos por el gobierno colombiano, para apoyar proyectos de investigación y desarrollo que implementen fuentes no convencionales de energía y promuevan una gestión eficiente de ésta.Método: a través de una metodología descriptiva, se presenta un modelo de arquitectura que describe la interoperabilidad de los componentes de una red inteligente.Resultados: dentro de los resultados se establece una relación de los objetivos que en materia energética han proyectado las entidades públicas y privadas en Colombia, particularizando en las oportunidades que se tiene para dotar de inteligencia artificial el sistema eléctrico actual.Conclusiones: desde el contexto de seguridad eléctrica, equidad social y mitigación del impacto ambiental en Colombia, el sistema energético debe afrontar los nuevos retos requeridos para satisfacer la demanda. Desde un punto de vista técnico, es necesario dotar la red tradicional con las características de una red inteligente y, desde una perspectiva legal, es imprescindible generar un esquema normativo y regulatorio claro que propenda por el desarrollo de este tipo de tecnología.
Source Analysis of Silicon and Uranium in uranium-rich shale in the Xiuwu Basin, Southern China
Authors: Li Zhuo , Zhang Kun , Song Yan , Liu Xiaoxue , Jiang Zhenxue , Jiang Shu , Wen Ming , Huang Yizhou , Jia Chengzao , Liu Weiwei , Wang Xin , Li Xin , Chen Zhiyuan , Tang Ling , Wang Pengfei , Liu Tianlin , Xie Xuelian 
Published: April 2019

Abstract
Uranium deposits are crucial resources for the development of the nuclear energy. Among known sources of uranium, the uranium-rich shales have recently obtained significance. In this paper, the Lower Cambrian Wangyinpu Formation shale in the Xiuwu Basin, southern China, has been studied using a combination of techniques including element analysis (Al, Fe, and Mn), δ30Si silicon isotopic analysis, δ18O oxygen isotopic analysis, study of core samples. It has been observed that significant hydrothermal activity occurred in the Xiuwu Basin during the Early Cambrian period. The results show that 20%–40% of the silicon in most of the sections of the Lower Cambrian Wangyinpu Formation were inherited from the hydrothermal fluids, with temperatures ranging between 75∘C and 102∘C. It is concluded that more than 90% of the uranium in most of the sections of the Lower Cambrian Wangyinpu shale was derived from submarine hydrothermal fluids, while less than 10% from the terrigenous detritus. The enrichment of uranium in the basin was observed in the Middle-Upper part of the Wangyinpu Formation and the geological resources estimated to a tune of ~4.9×103 t. In this paper, we proposed a model for silicon and uranium enrichment in the Lower Cambrian shale controlled by hydrothermal activity in the Xiuwu Basin. This model also provides a scientific rationale for uranium further exploration and exploitation of the uranium resource.
Surgical leadership in Africa – challenges and opportunities
Authors: Frimpong-Boateng Kwabena , Edwin Frank 
Published: April 2019

AbstractSurgical care has been described as one of the Cinderellas in the global health development agenda, taking a backseat to public health, child health, and infectious diseases. In the midst of such competing health-care needs, surgical care, often viewed by policy makers as luxurious and the preserve of the rich, gets relegated to the bottom of priority lists. In the meantime, infectious disease, malnutrition, and other ailments, viewed as largely affecting the poor and disadvantaged in society, get embedded in national health plans, receiving substantial funding and public health program development. It is often stated that the main reason for this sad state of affairs in surgical care is the lack of political will to improve matters in the health sector. Indeed, in 2001, the Commission on Macroeconomics and Health concluded that the lack of political will to sufficiently increase spending on health at the sub-national, national, and international levels was perhaps the most critical barrier to improving health in low-income countries. However, at the root of this lack of political will is a lack of political priority for surgical care.
Image Compression Based on Block SVD Power Method
Authors: Asnaoui Khalid El 
Published: April 2019

Abstract
In recent years, the important and fast growth in the development and demand of multimedia products is contributing to an insufficiency in the bandwidth of devices and network storage memory. Consequently, the theory of data compression becomes more significant for reducing data redundancy in order to allow more transfer and storage of data. In this context, this paper addresses the problem of lossy image compression. Indeed, this new proposed method is based on the block singular value decomposition (SVD) power method that overcomes the disadvantages of MATLAB’s SVD function in order to make a lossy image compression. The experimental results show that the proposed algorithm has better compression performance compared with the existing compression algorithms that use MATLAB’s SVD function. In addition, the proposed approach is simple in terms of implementation and can provide different degrees of error resilience, which gives, in a short execution time, a better image compression.
Metabolic characterization of amniotic fluids of fetuses with enlarged nuchal translucency
Authors: Iuculano Ambra , Murgia Federica , Peddes Cristina , Santoru Maria Laura , Tronci Laura , Deiana Monica , Balsamo Antonella , Euser Anna , Atzori Luigi , Monni Giovanni 
Published: April 2019

Abstract

Background
In prenatal diagnosis, a thickened nuchal translucency (NT) is one of the most sensitive and specific markers for several defects but it may also be found in 5% of healthy fetuses. The pathophysiological causes that lead to an increase in NT are not yet fully understood. Metabolomics represents a new promising approach, useful for studying different metabolites in biological organisms in response to environmental stressors. The aim of our study was to investigate the metabolomic profile of the amniotic fluid samples (AFS) of euploid fetuses with enlarged nuchal translucency (ENT) compared to a control group (C group).

Methods
This study was carried out on a group of women who underwent second-trimester amniocentesis for advanced maternal age (C group) or for NT ≥95th percentile (ENT group) found during first-trimester aneuploidy screening. AFS were analyzed with proton nuclear magnetic resonance (1H-NMR) and high-performance liquid chromatography (HPLC), and subsequent multivariate and univariate statistical analyses were conducted, followed by pathway analysis.

Results
In total, 67 AFS from the C group and 23 from the ENT group were analyzed. Partial least square discriminate analysis was carried out (R2X=0.784, R2Y=0.658, Q2=0.622, P<0.0001). A different metabolic profile was observed in the ENT group compared with the C group, suggesting an energetic shift to a glycolytic phenotype in an oxidative environment in the ENT group compared to the C group.

Conclusion
Metabolomic studies enable the identification of metabolic alterations occurring in fetuses with ENT. These findings may provide a new basis for better understanding the pathophysiological mechanisms in this prenatal phenomenon.
2-D noise maps for tier-2 city urban Indian roads
Authors: Sonaviya Dipeshkumar R. , Tandel Bhaven N. 
Published: April 2019

Abstract
In today’s era, vehicular noise pollution has been identified as a serious danger that influence the attribute of the urban regions. To identify the influence of noise effects, noise maps are very useful. A noise mapping study has been carried out to study the propagation of urban road traffic noise in the areas along with field measurements. The computer simulation model (Sound- PLAN software) is used to developed noise maps. In developing nations like India, traffic composition is heterogeneous. These traffic compositions contain vehicles, which have different sizes, speeds variations and operating systems. Because of fluctuating speeds, deficiency of lane disciplines, and non-authorized parking on main road lanes, honking events becomes inevitable, which changes and affects the urban soundscape of nations like India. Due to horn events (heterogeneous traffic condition), noise level (LAeq) increase by 0.5–8 dB (A) as compared to homogeneous traffic conditions.
Das Opferentschädigungsgesetz
Authors: Wulff Jonathan 
Published: April 2019

Zusammenfassung
Das Opferentschädigungsgesetz (OEG) bietet einen umfassenden Leistungskatalog – eine grundlegende Reform ist dem Autor zufolge dennoch nötig. Der Autor zeigt auf, dass das Bundesversorgungsgesetz den Anforderungen einer effektiven Versorgung von Gewaltopfer nur eingeschränkt genügt und kritisiert, dass Opfer „psychischer Gewalt“ keinen Anspruch auf Versorgung haben. Der Artikel gibt einen kurzen Überblick über die aktuelle Diskussion zur Reform des Sozialen Entschädigungsrechts.
Säkulares Sterben?
Authors: Greiner Florian 
Published: April 2019

Vorspann
Der Tod als unausweichliches Ende des menschlichen Lebens ist eine anthropologische Konstante, aber der gesellschaftliche Umgang mit dem Sterben unterliegt historischen Wandlungsprozessen. Obwohl Philippe Ariès das mit seiner großen Studie zur „Geschichte des Todes“ schon 1977 gezeigt hat, nähert sich die Zeitgeschichtsforschung dem Thema erst in jüngerer Zeit. Florian Greiner untersucht, wie sich der Diskurs über Tod und Sterben in Westdeutschland nach 1945, vor allem aber seit den 1970er Jahren geändert hat. Dass die Kirchen dabei eine zentrale Rolle spielen, vor allem seit sie nach anfänglicher Skepsis begonnen haben, die Ideen und Initiativen der Hospizbewegung aufzunehmen, stellt verbreitete Annahmen über die fortschreitende Säkularisierung moderner Gesellschaften in Frage.
Walther Rauff und die chilenische Militärdiktatur unter Augusto Pinochet
Authors: Klein Marcus 
Published: April 2019

Vorspann
Walther Rauff, seit 1944 Standartenführer der SS, gehörte bis zu seinem Tod im Mai 1984 als Verantwortlicher für die Entwicklung und den Einsatz der sogenannten Gaswagen zu den meistgesuchten NS-Verbrechern. Er hatte sich der Strafverfolgung durch Flucht entzogen und lebte seit Ende der 1950er Jahre in Chile. Als die Streitkräfte dort im September 1973 den sozialistischen Präsidenten Salvador Allende stürzten und unter General Augusto Pinochet eine brutale Militärdiktatur errichteten, wurden rasch Stimmen laut, Rauff sei an verantwortlicher Stelle für den berüchtigten chilenischen Geheimdienst tätig. Belastbare Indizien dafür fanden sich nie, dennoch entwickelte dieses Gerücht eine erstaunliche Beharrungskraft. Marcus Klein spürt der Frage nach, wie es dazu kam, welche Akteure und Netzwerke dabei eine wichtige Rolle spielten und warum sich das Gerücht bis in unsere Tage halten konnte.
Sayan–Biryusa Volcanoplutonic Belt (Southern Siberian Craton): Age and Petrogenesis
Authors: Donskaya T.V. , Gladkochub D.P. , Mazukabzov A.M. , L’vov P.A. , Demonterova E.I. , Motova Z.L. 
Published: April 2019

Abstract
—Geological, geochronological, and geochemical isotope studies are carried out for metamorphosed volcanic rocks and dolerites of the Maltsevka sequence of the Elash Group in the Biryusa block of the Siberian craton. It is found that mafic igneous rocks (dolerites and basaltic andesites) are close in composition to intraplate basalts. Flat or slightly fractionated REE patterns ((La/Yb)n = 1.3–2.3) and positive εNd(T) values of +3.7 and +4.1 are observed. It is assumed that the depleted asthenospheric mantle and, possibly, plume mantle were the sources of these rocks, while the lithospheric mantle had no significant effect. Meta-andesites of the Maltsevka sequence belong to the tholeiitic series and have high La, Th, and U contents. Pronounced negative Nb and Ti anomalies are observed in the multielement patterns of these rocks, along with negative εNd(T) values of –4.6. It is assumed that meta-andesites were resulted from the late Archean crustal melting with the participation of the mantle material. Metarhyolites prevalent in the Maltsevka sequence are divided into two groups similar in REE composition to A-type and I-type granites. A-type metarhyolites show high contents of Zr, Y, Nb, Th, and REE (except for Eu) and positive εNd(T) values of +2.2 and might have resulted from the melting of the source with geochemical isotope parameters close to those of mafic igneous rocks of the Maltsevka sequence. I-type metarhyolites have low contents of Y, Yb, Zr, and Nb but high contents of Th and show negative εNd(T) values of –3.7. They might have resulted from the melting of lower crustal diorite–tonalite rocks with addition of juvenile mantle material to the magma generation area. U–Pb zircon dating of metarhyolites of the Maltsevka sequence corresponding to A- and I-type granites showed that they are close in age, 1872 ± 10 and 1874 ± 10 Ma, respectively, which agrees with the age estimated earlier for granitoids of the Sayan complex of the Biryusa block. The similar ages and structural positions, along with the localization within the same structure, made it possible to unite volcanic rocks of the Elash Group and granitoids of the Sayan complex of the Biryusa block into a Paleoproterozoic volcanoplutonic association. The rocks of the association form the Sayan–Biryusa volcanoplutonic belt stretching for about 300 km along the zone of junction of the Biryusa block of the Angara fold belt and the Archean Tunguska superterrane of the Siberian craton. The belt is part of the large Paleoproterozoic South Siberian postcollisional magmatic belt formed at the final formation stage of the Siberian craton, when it was possibly part of the Paleoproterozoic Columbia supercontinent.
Determination of electrophysiological properties of human monocytes and THP-1 cells by dielectrophoresis
Authors: Mohamed Rafeezul , Azhar Abdul Razak Mohd , Adib Kadri Nahrizul 
Published: April 2019

Introduction: Dielectrophoresis (DEP) is based on polarization and bioparticle movement in applied electric fields. Each type of cells has its own electrical properties within the DEP spectra and undergoes significant changes in direction of frequency following an increase of an applied nonuniform alternating current (AC) electric field. Therefore, DEP can be an effective technique for characterization and separation of different cells. The goal of the current study was to determine the electrophysiological properties of human monocytes and a human monocytic cell line originated from an acute monocytic leukemia patient (THP-1), using a lab on a chip (LOC) device that utilised microarray dot electrodes.
Methods: Ten microliters of human monocytes isolated from peripheral blood mononuclear cells and highly confluent THP-1 cells were diluted in DEP medium and added to the spacer of the LOC device. Subsequently, the AC signal in the range of 10 kHz to 2 MHz was supplied to the LOC device, and the dynamic behaviours of monocytes and THP-1 cells due to the DEP force were observed. Images were captured and analyzed using MATLAB software.
Results: Microscopic visualization showed that THP-1 cells were physically larger than human monocytes. The dielectric parameters (radius, diameter, and conductivity and permittivity of the cytoplasm and membrane) were greater for THP-1 cells compared to monocytes. The cross-over frequencies for THP-1 cells and monocytes were respectively 66 kHz and 280 kHz.
Conclusion: In conclusion, the DEP spectra reflected the morphological differences between monocytes and THP-1 cells. The dielectric properties for each type of cells can be used as the criteria in the development of DEP-based characterization assays.
Implementation of a General Pediatric Clinical Rounding Checklist
Authors: Clark Nicholas A. , Burrus Stephanie , Richardson Troy , Sterner Sophia , Queen Mary Ann 
Published: April 2019

BACKGROUND:
Checklists have been found to improve patient outcomes in a variety of health care settings, but use is rare during general pediatric rounds. We aimed to decrease length of stay (LOS) by 10% within 12 months through the standardized delivery of 8 aspects of hospital care for the general pediatric unit.

METHODS:
For the general pediatrics unit at our freestanding children’s hospital, a clinical rounding checklist was developed through a consensus of teaching faculty. Iterative plan-do-study-act cycles were conducted in a targeted medical unit over a 12-month period. We assessed change using control charts.

RESULTS:
Checklist use increased from 61% to 96% early in the implementation phase. LOS (72 hours) was relatively unchanged. Cardiorespiratory monitor (CRM) duration was reduced by 28% (17.3 hours) within 4 months and was sustained for more than 12 months. A similar CRM reduction of 29% (22.5 hours) was seen in our medically complex patient subgroup. No clinically significant change was appreciated in central line, peripheral intravenous (IV) catheter, IV fluid, or IV medication duration. Thirty-day readmissions, code blue events, and rapid response team activations were not impacted.

CONCLUSIONS:
The use of a clinical rounding checklist on the general pediatric floor improved care in only 1 of 8 targeted domains. LOS did not change significantly over the project’s duration. CRM duration was significantly reduced in both routine patients and medically complex children, and these improvements were sustained without impacting patient safety. More study is needed to determine which checklist components, if any, may prove beneficial to patient outcomes.
Pediatric Readmissions Within 3 Days of Discharge: Preventability, Contributing Factors, and Necessity
Authors: Rodriguez Victoria A. , Goodman Denise M. , Bayldon Barbara , Budin Lee , Michelson Kelly N. , Garfield Craig F. , Rychlik Karen , Smythe Kathryn , Schroeder Sangeeta K. 
Published: April 2019

OBJECTIVES:
Among pediatric 30-day readmissions, 20% to 30% are preventable, and ∼25% are within 3 days of discharge. We investigated the preventability, contributing factors, and necessity of 3-day pediatric readmissions.

METHODS:
We enrolled patients who were readmitted within 3 days at a freestanding tertiary children’s hospital in this single-site observational study from July 2016 to February 2017. We performed chart reviews and interviews with discharge and readmission providers and families. Preventability was defined by the chart reviewer’s determination. Contributing factors for readmission, demographics, and clinical characteristics were analyzed for association with preventability and necessity. We analyzed qualitative data using content analysis.

RESULTS:
Of the 125 readmission cases included, 60 (48%) were preventable per chart reviewer compared with 27 of 92 (29%) per discharge providers, 33 of 93 (35%) per readmission providers, and 9 of 36 (25%) per families. Preventability was associated with the following contributing factors: problems with clinical decision-making in 54 of 125 (43%) readmissions (P &lt; .001), issues with the discharge process in 25 of 125 (20%) readmissions (P = .01), clinically related admission and readmission (P = .004), and weekday of initial discharge (P = .02). Seventeen percent were unnecessary per readmission provider. Clinically unnecessary readmissions were associated with Hispanic ethnicity (P = .02), outside-hospital transfer (P = .05), and problems with clinical decision-making (P = .01). Qualitative data highlighted disagreement on readiness for discharge and the necessity of readmission among various providers and family.

CONCLUSIONS:
More than one-half of 3-day readmissions were considered either preventable or unnecessary. Clinical decision-making, discharge processes, and improving consensus among families and providers may be valuable areas for future efforts to reduce readmission.
Consumer loyalty programs: impact of different modalities
Authors: Zanchett Ricardo , Paladini Edson Pacheco 
Published: April 2019

The present study structures a new modality for loyalty programs and compares it with traditional approaches. Initially, described here are two modalities of loyalty programs - individual and coalition, often used, being analyzed are their main characteristics, advantages and restrictions, market ranges in which they operate and the managerial implications of each modality. Subsequently, the study proposes a new program modality (cluster) and provides practical aspects for its use. The types of loyalty (loyalty to the brand, loyalty to the store or loyalty to the program) that are intended to be achieved in each program modality were also identified. Participation of partners, accumulation of benefits, options for recovery of benefits, market ranges, program management and program focus were the analyzed variables for comparison of the programs. This analysis revealed which approaches are most appropriate for each type of program.
Quisiera que me explicara el subjuntivo. Actitudes y percepciones de hablantes de herencia de español en el contexto de estudios en el extranjero
Authors: Cabal Jiménez Munia 
Published: April 2019

Este estudio analiza las percepciones de hablantes de herencia acerca de su propia variedad y sus actitudes y percepciones en el contexto de estudios en el exterior. Se analizan y contrastan las percepciones de hablantes de herencia que participan en un programa en España, por un período de tres meses, versus un grupo que participa en un programa en Costa Rica por un mes. El objetivo de este estudio es determinar, si después de haber participado en programas de estudio de lengua española en estos países, la experiencia impacta o modifica la percepción y comprensión sobre su español de herencia y, si diverge, en cuál parámetro. Los participantes son todos de la región del Medio Oeste, Estados Unidos (particularmente de Illinois), nacidos en los Estados Unidos y mayormente de origen mexicano. Los datos se recogen a través de un cuestionario aplicado via Qualtrics o personal que contiene veinticuatro preguntas en torno al perfil y bagaje del estudiante antes de dirigirse al programa de estudios en el extranjero, percepciones y reacciones durante los exámenes de ubicación escritos y orales, y su propia valoración después del programa. Las preguntas se circunscriben al ámbito académico en el país de inmersión.
Palabras clave: estudios en el extranjero, hablantes de herencia, español, actitudes, percepciones.
Modos de escucha en música y en psicoanálisis
Authors: Picún Fuentes Olga , Fernández Caraballo Ana María 
Published: April 2019

En la larga historia de la música occidental, cuyo antecedente directo se suele ubicar en la antigua Grecia, el oyente y la escucha han experimentado múltiples cambios. La ley que rige un modo de escuchar no se encuentra por fuera de determinaciones históricas, políticas y sociales que exceden el campo específicamente musical. No obstante, las transformaciones musicales resultan ineludibles para aproximarse a una comprensión de los cambios que se producen en el oyente y en el acto de oír una obra musical.
¿De qué manera ha sido tratada la música por parte de Freud y por parte de Lacan? ¿Cuál es el interés que puede suscitar para el psicoanálisis las dimensiones sonoras en sus diferentes tratamientos? ¿De qué modo se producen las transformaciones sonoras en el modernismo y cómo afectan la escucha? ¿Qué relaciones se pueden establecer entre dichas transformaciones y el psicoanálisis?
Palabras clave: consonancias, disonancias, música, psicoanálisis.