bluuebunny/crossref_metadata_2025_split huggingface dataset:
Caracterización de polímeros aplicando el método termogravimétrico
Authors: Rodríguez Ellen , Villegas Ernesto 
Published: May 2019

La termogravimetría es una técnica que ha sido utilizada para la caracterización de materiales, principalmente de carbón y arcillas. En los últimos años la técnica se ha extendido a otros materiales. Esta técnica en combinación con otros métodos térmicos provee una fuente de información no solamente térmica sino también química. Es importante aclarar que este método no permite conocer la composición química del material en estudio ni tampoco identificar los cambios térmicos que no están asociados con variaciones de masa como la cristalización o la transición vítreaLa termogravimetría se basa en los cambios de masa como resultado de una variación de temperatura o por someter un material a una temperatura establecida durante un periodo definido. Los cambios de masa identificados permiten determinar bajo qué condiciones los materiales se descomponen. Los resultados se expresan gráficamente a través de termogramas
Pruebas experimentales para determinar la capacidad de columnas de concreto prefabricado
Authors: Villalobos Ramírez Francisco , Alfaro Martínez José Pablo 
Published: May 2019

Este documento desarrolla un método para comparación y correlación de dos métodos para prueba de columnas prefabricadas de concreto reforzado. El objetivo principal de este artículo es simplificar el control de calidad en este campo y brindar información para extrapolar los resultados que se obtengan de un método de prueba más sencillo como el ASTM C78M, Método Estándar para la Capacidad en flexión del Concreto (usando una viga simple cargada en el tercio medio) a un método con un modelo más cercado al modelo analítico comúnmente utilizado para determinar el estado de fuerzas internas de la columna, como el Método para la Capacidad en flexión del Concreto (usando una viga empotrada en 0,220 · L y cargada a los 0,728 · L.). Para la investigación fueron evaluadas 5 fábricas productoras de columnas, Para cada fábrica, fueron fallas 7 columnas con un método y 7 columnas con el otro método. El resultado experimental indica que aparentemente no existe diferencia significativa entre los dos métodos
Requisitos para madera estructural según el CSCR-2010 y su aporte en la investigación
Authors: González Beltrán Guillermo 
Published: May 2019

Este artículo trata sobre la relación entre las especificaciones del Código Sísmico de Cosa Rica 2010 (CSCR-10) y la investigación generada a partir de ellas. El uso de la madera para construcción en Costa Rica ha venido creciendo desde el año 2000, en el cual se desarrollaron productos industrializados, tales como madera laminada (GLULAM) y madera contrachapada (PLYWOOD). A raíz de esto, el CSCR empezó a trabajar en la elaboración de un capítulo para la versión del año 2010 de ese código (CSCR-10) en donde se desarrolla la especificación para madera estructural. El objetivo de este artículo es destacar el impacto que han tenido los códigos de diseño y las normas de especificación en el desarrollo de la investigación aplicada en el campo del diseño y construcción con madera. Para establecer esta relación, se explican las secciones del CSCR-10 y luego se describen las investigaciones más relevantes. Finalmente, se concluye que el CSCR tiene un gran impacto en el desarrollo de la investigación de la madera estructural en Costa Rica, lo cual se ve reflejado en las investigaciones que se han realizado en un periodo de ocho años.
Resistencia de bloques y prismas de mampostería de concreto en Costa Rica
Authors: Abarca Jiménez Andrés , González Beltrán Guillermo 
Published: May 2019

La resistencia de sistemas de mampostería depende en gran medida de la resistencia de los bloques que la componen, por lo tanto, a este parámetro se le ha brindado una gran importancia en la normativa de diseño de mampostería a nivel mundial. En Costa Rica, el Código Sísmico regula el diseño y construcción con mampostería, y clasifica los bloques en tres clases: A, B y C, siendo la Clase A el de mayor resistencia requerida.En la presente investigación se analizan resultados experimentales de pruebas de compresión de 1320 especímenes de bloques de concreto y 386 prismas de mampostería obtenidas de la base de datos del LanammeUCR para examinar su resistencia y cumplimiento con respecto a la normativa costarricense vigente. Se determina que el mercado de producción de bloques ha evolucionado desde la implementación de la normativa vigente y que poco más del 90% de los bloques producidos en el país actualmente cumplen con la clasificación de Clase A indicada en el CSCR-2010. Adicionalmente se determina que aproximadamente el 90% de los prismas de mampostería elaborados a partir de bloques de mampostería producidos en el país, presentan una resistencia a la compresión medida sobre el área neta superior a los 10 MPa.
The Recent Revolution in High Performance Computing
Authors: Simon Horst D. 
Published: May 2019

Recent events in the high-performance computing industry have concerned scientists and the general public regarding a crisis or a lack of leadership in the field. That concern is understandable considering the industry's history from 1993 to 1996. Cray Research, the historic leader in supercomputing technology, was unable to survive financially as an independent company and was acquired by Silicon Graphics. Two ambitious new companies that introduced new technologies in the late 1980s and early 1990s—Thinking Machines and Kendall Square Research—were commercial failures and went out of business. And Intel, which introduced its Paragon supercomputer in 1994, discontinued production only two years later.During the same time frame, scientists who had finished the laborious task of writing scientific codes to run on vector parallel supercomputers learned that those codes would have to be rewritten if they were to run on the next-generation, highly parallel architecture. Scientists who are not yet involved in high-performance computing are understandably hesitant about committing their time and energy to such an apparently unstable enterprise.However, beneath the commercial chaos of the last several years, a technological revolution has been occurring. The good news is that the revolution is over, leading to five to ten years of predictable stability, steady improvements in system performance, and increased productivity for scientific applications. It is time for scientists who were sitting on the fence to jump in and reap the benefits of the new technology.
Legal aspects of safety management in civil aviation
Authors: Lutek Michał Wojciech 
Published: May 2019

<p><strong></strong>The article aims to show selected issues related to safety management system with particular reference to its legal aspects. It is composed of seven parts. The first one outlines the general overview on the problem of aviation safety. In the following passage, substance of safety management in civil aviation is presented. Third part describes key factors determining safety in aviation. In the fourth subtitle, selected issues regarding international regulations concerning safety management systems are discussed with reference to Chicago Convention and Annex 19 which established detailed arrangements for safety management. Subsequently, the author describes the EU legislation related to subject matter as well as major institution in charge of ensuring safety like European Aviation Safety Agency. The las but one subtitle refers to some legal aspects of safety management in civil aviation in Polish law. The summary contains conclusions drawn from the analysis of the both international and polish regulations.</p><p><strong>Purpose</strong> - The paper’s main purpose is to present legal framework of aviation safety management at the level of international, European and polish law. The author also investigates the role of legal regulations in the process of keeping aviation safe with reference to other factors which have a negative influence on aviation safety. </p><p><strong>Design/Methodology/Approach </strong>- A comprehensive analysis of legislation was conducted along with literature review including international publications focused both on the area of management and law. The reference list was selected in such way to show an objective and impartial approach to the subject matter.</p><p><strong>Findings </strong>- The laws regarding safety management in aviation are subject to harmonization but we can observe that the regulations are becoming more and more technical and complex.</p><p><strong>Research limitations/implications </strong>- The limitations of this paper lie in the lack of review of the studies of practical part of the safety management system regulations.</p><p><strong>Practical implications</strong>-The review shows a profound review of legislation which may be used by both managers and lawyer from aviation industry. Moreover, some statistical data is provided in order to emphasize the importance of safety management in the current world.</p><p><strong>Originality/Value</strong>-The article presents analysis carried at three levels of legal regulations, i.e. international, European and local (Polish) which is the best way to show similarities and point out differences. </p><br />
EFFECT OF FATTY OIL EXTRACT FROM SEEDS OF NIGELLA DAMASCENA L. ON LIPID SPECTRUM IN RATS WITH SIMULATED DYSLIPIDEMIA
Authors: Efremova M. P. 
Published: May 2019

The aimof the study is to determine a lipid spectrum of blood plasma and liver in rats in with simulated dyslipidemia against the background of the administration of the fatty oil extract from the seeds of Nigella damascena L.Materials and methods.Laboratory animals – Wistar male rats – were used in the work. To study the hypolipidemic activity, such models as acute Tween, subchronic vitamin-D2 models and a model of chronic heart failure were used. The identifiable parameters were the concentration of cholesterol and triglycerides in the blood serum and liver, as well as the concentration of atherogenic and non-atherogenic lipoproteins in the blood serum, and the atherogenic coefficient.Results.As a result of the study, it was found out that a course administration of the fatty oil extract from the seeds of Nigella damascena L. against the background of simulated chronic heart failure (CHF) by the right ventricular type, normalizes the lipid spectrum of the experimental animals’ blood serum, causing an increase in the concentration of high-density (non-atherogenic) lipoproteins, and reduces the concentration of low-density (atherogenic) lipoproteins. A single administration of the fatty oil extract from the seeds of Nigella damascena L. promotes the correction of lipid metabolism disorders under the conditions of acute Tween lipidopathy, while the direction of the object being studied reduces the concentration of cholesterol and triglycerides in the liver and blood serum under the conditions of subchronic dyslipidemia. At the same time, the effect of the use of the fatty oil extract from the seeds of Nigella damascena L. was not inferior to “Omaсor”, the reference drug.Conclusion.The possibility of using a fatty oil extract from the seeds of Nigella damascena L. for preventive and therapeutic aims in cardiovascular diseases has been established.
Direct Superior Approach to the Hip for Total Hip Arthroplasty
Authors: Barrett Andrew A. , Ezzibdeh Rami M. , Horst Patrick K. , Roger Douglas J. , Amanatullah Derek F. 
Published: May 2019

Background:
Traditional posterior approaches to the hip, posterolateral and mini-posterior, violate the iliotibial band and the short external rotators, specifically the quadratus femoris and obturator externus muscles
1–4
. The direct anterior approach does not violate the iliotibial band or the quadratus femoris, resulting in earlier ambulation and lower dislocation rates
1,5–9
. The direct superior (DS) is a posterior approach that spares the iliotibial band, obturator externus tendon, and quadratus femoris muscle. The goal of minimally invasive surgery (MIS) is to disrupt the least amount of tissue necessary to adequately expose the hip and correctly place implants. Although MIS total hip arthroplasty (THA) has not lived up to all of its promises
10–13
, MIS-THA may enable early ambulation and decrease length of stay
14–16
.

Description:
The patient is positioned in the lateral decubitus position. An 8 to 10-cm incision is made at a 60° oblique angle starting from the posterior-proximal corner of the greater trochanter. Only the gluteus maximus fascia is incised; the Iliotibial band is completely spared. The gluteus maximus muscle is split bluntly, exposing the gluteus medius muscle, piriformis tendon, and triceps coxae (the obturator internus and superior and inferior gemellus muscles). The piriformis and conjoined tendon are released from the greater trochanter and tagged. The gluteus minimus is elevated, exposing the posterior hip capsule. An arthrotomy is performed prior to dislocating the hip with flexion, adduction, internal rotation, and axial compression. The femoral neck is resected, the acetabulum is reamed, and components or trials are impacted into position. Hip stability is assessed. Final implants are placed. The posterior capsule, piriformis, and obturator internus tendons are repaired anatomically. The fascia and skin are closed.

Alternatives:

Posterolateral approach.Mini-posterior approach.Direct lateral approach.Anterolateral approach.Percutaneously assisted total hip (PATH).Supercapsular PATH (SuperPath).

Rationale:
The DS approach to the hip differs from the traditional posterior and mini-posterior approaches because it preserves the iliotibial band, quadratus femoris muscle, and obturator externus tendon
1
, potentially suppressing dislocation. The DS approach to the hip causes less soft-tissue destruction, especially to the gluteus minimus and tensor fasciae latae muscles, compared with the direct anterior approach to the hip, suggesting DS-THA may enhance postoperative mobility
1,3,14–16
. DS-THA is extensile by extending the incision distally, incising the iliotibial band, and releasing the quadratus femoris muscle. This converts a DS approach to a standard posterolateral approach, providing additional visualization.
Dynamics of vitamin D level in patients with chronic pancreatitis on the background of enzyme replacement therapy
Authors: Bideyeva T. V. , Andreyev D. N. , Kucheryavy Yu. A. , Maev I. V. 
Published: May 2019

According to the latest data, the risk of vitamin D deficiency in patients with chronic pancreatitis (CP) and associated exocrine pancreatic insufficiency (EPI) is higher than in the general population. The aim of the present study was to evaluate the dynamics of vitamin D level in patients with CP with EPI against the background of long-term enzyme replacement therapy (ERT) with the use of microencapsulated pancreatin preparations. The study included 58 CP patients, who were divided into two groups depending on the results of laboratory assessment of nutrient status parameters. The 1st group consisted of the patients with the signs of EPI (according to the data of low values of the elastase test) without deviations in the nutritive status. The 2nd group consisted of CP patients with EPI and low values of stool elastase-1 and abnormal nutrient status. According to the results of the study, the serum level of vitamin D in the 1st group was 36.05 (95% CI 32.8397–38.9603) ng/ml, and in the 2nd group - 10.6 (95% CI 32.8397– 38.9603) ng/ml. A reliable inverse correlation between the past history duration and vitamin D level (r = -0.5644; 95% CI -0.8162 – -0.1324, p = 0.0147) was revealed, as well as a reliable direct correlation between elastase and vitamin D levels in the 2nd group (r = 0.8296; 95% CI 0.592–0.9345, p < 0.0001). Long-term ERT (8-12 months) resulted in a significant increase of vitamin D level in the 2nd group of patients from 10.6 (95% CI 32.8397–38.9603) ng/ml to 17.1 (95% CI 12.0166-23.6232) ng/ml (p < 0.0003).
Особенности смысловых процессов и явлений в командном взаимодействии
Authors: Pronenko Evgeny A. , Bunyaeva Maria V. 
Published: May 2019

Introduction. Along with the socio-psychological characteristics of team interaction and management issues, innermost meaning aspects of team interaction merit special attention. The successful realization of meaning processes and phenomena determines the development of team interaction in teams. At present, little is known about meaning aspects of team interaction. This study investigates the conditions of meaning processes in teams and factors contributing to and hindering them.
Theoretical Basis. The theory of self-organization of joint mental activity (A. K. Belousova) as a framework for revealing meaning dynamics in team interaction and also fundamental propositions of the psychology of meaning developed by Russian researchers (D. A. Leontiev, I. V. Abakumova, etc.) provided methodological foundations for the present study.
Results and Discussion. The authors considered the process of meaning transmission which generates common new formations in teams including psychological situations, meanings, motives, goals, and assessments. In turn, these new formations contribute to the development of the common meaning field or meaning fund in teams. Meaning communication among team members is extremely important. Team members’ common conscious understanding of what they do and how they do promotes both harmonious interpersonal relationships and effective communication which is important for successful work. Meaning dialogue is a technology that provides meaning communication and changes in team members’ value-meaning sphere. Meaning resonance contributes to meaning communication among team members; meaning dissonance impedes it. The meaning aspect of team cohesion is a complex phenomenon that affects many team processes. The results of the study can be used in a further study of meaning aspects of team interaction in the practice of team formation. The findings are of interest to the specialists engaged in studying teams and psychology practitioners working with teams.
Recurrent Spontaneous Coronary Artery Dissection Presenting with STEMI, Once is Never Enough!
Authors: Al Emam Abdel R. , Akkad Haysam , Asawaeer Majid , Pompili Vincent 
Published: May 2019

Background:
Spontaneous coronary artery dissection (SCAD) is an under-recognized
cause of acute coronary syndrome in women.

Case Presentation:
We present a 40-year-old female who presented with recurrent STEMI due to
recurrent SCAD 10 days after the index presentation in a different coronary territory. She was successfully
treated both times with drug eluting stents. MRI showed an evidence of transmural infarction
but her ejection fraction was only mildly reduced. She had good short term outcome.

Conclusion:
High index of suspicion is crucial for early diagnosis and prompt medical and interventional
management in patients with SCAD.
REDUCTION OF EMPLOYMENT OF FORMULA WORKING BY USING LOCAL FILL-ERS AND WASTE OF PRODUCTION
Authors: Omarov A. O. , Otsokov K. A. 
Published: May 2019

Objectives.The purpose of this study is to study the increase in turnover of formwork and reduce the complexity of formwork for monolithic foam concrete by regulating its properties through the optimal use of local aggregates of the Republic of Daghestan and industrial waste. In particular, the experimental work used cement grade M500, silica filler - deposits of quartz sand in Kumtorkala district of the Republic of Daghestan with a low module of size, various synthetic foaming agents, perlite sand, ground expanded clay sand (Kizilyurt, Republic of Daghestan),stone crushing roar (Kizilyurt).Method.In the production of foam concrete, a method was used in which foam was prepared in the foam generator, then a solution of cement, filler and water was prepared. Then the foam is mixed with a solution in a foam mixer until a set of appropriate multiplicity. (Multiplicity in this case was defined as the ratio of the volume of the foam concrete mixing solution after mixing to the volume of the solution before mixing). During the study, the water-cement ratio was determined using three types of aggregates (expanded clay sand, quartz sand deposits Kumtorkala district and perlite sand). The turn-over rate of the concrete mixture was determined using the Attard viscometer.Result.The results of studies have shown that with an increase in the water-cement ratio using three types of aggregates (expanded clay sand, quartz sand deposits Kumtorkala district and perlite sand ) will increase the flow rate of the foam concrete mixture.Conclusion.At the same values of the water-cement ratio, the mixture with a filler of perlite sand has the lowest fluidity, which in turn affects the further structure formation of foam concrete and allows you to choose the optimal composition with the desired properties. The possibility of increasing the turnover of artwork and reducing the complexity of artwork work for monolithic foam concrete by regulating its properties due to the optimal use of local aggregates of the Republic of Daghestan and industrial waste.
Innovation Needs, Social Capital, and Learning Process of Batik Craftsmen
Authors: Tohani Entoh , Sugito Sugito 
Published: May 2019

AbstractThis study aims to determine batik craftsmen‘s innovation needs and learning process in relation to ownership of social capital. This study is stimulated by an assumption explaining that batik craftsmen’s are able to fulfill their innovation needs through learning process by utilizing established social capital in the batik production context. This qualitative research was conducted on three batik craft SMEs in two sub-districts in Bantul Regency, the center of Yogyakarta's batik production. The research subjects were craftsmen, workers, batik organizers, and community leaders. Data collection is conducted through observation and in-depth interviews. Meanwhile the data were analyzed by using qualitative analysis techniques. The research result reveals that the SMEs of batik craftsmen have diverse innovation needs in expanding their business. Moreover, to fulfill their innovation needs, they also conducted both independent and cooperative learning by utilizing the existing social capital. Yet, the learning process has not been optimally conducted. Thus, empowerment efforts are necessary to develop learning skills by utilizing social capital to meet craftsmen’s innovation needs. Keywords: social capital, learning process, innovation, batik, needsKebutuhan Inovasi, Modal Sosial, dan Proses Belajar Perajin BatikAbstrakPenelitian ini bertujuan untuk mengetahui kebutuhan inovasi dan proses belajar para perajin batik dalam konteks kepemilikan modal sosial. Hal ini didasarkan pada pandangan bahwa kebutuhan inovasi dapat dipenuhi apabila para perajin dapat memanfaatkan modal sosial yang terbangun dalam konteks usaha produksi batik melalui proses belajar yang mungkin terjadi di dalamnya. Penelitian kualitatif ini dilakukan terhadap tiga UKM perajin batik di dua kecamatan di Kabupaten Bantul sebagai sentra produksi batik Yogyakarta. Subjek penelitian adalah para perajin, pekerja, pengurus paguyuban batik, dan tokoh masyarakat. Pengumpulan data dengan observasi dan wawancara mendalam dan data dianalisis menggunakan teknik analisis kualitatif. Hasil penelitian menunjukkan bahwa perajin batik memiliki kebutuhan inovasi yang beragam dalam mengembangkan usahanya dan melakukan proses belajar baik secara mandiri maupun kooperatif dengan memanfaatkan modal sosial sebagai hasil interaksi dengan lingkungannya guna memenuhi kebutuhan inovasinya walaupun belum optimal. Oleh karena itu, diperlukan tindakan-tindakan pemberdayaan untuk meningkatkan kemampuan belajar dengan memanfaatkan modal sosial guna memenuhi kebutuhan inovasi perajin. Kata kunci: modal sosial, proses belajar, inovasi, batik, kebutuhan