bluuebunny/crossref_metadata_2025 huggingface dataset:
Confined elasticae and the buckling of cylindrical shells
Authors: Wojtowytsch Stephan
Published: February 2020

For curves of prescribed length embedded into the unit disk in two dimensions, we obtain scaling results for the minimal elastic energy as the length just exceeds

2
⁢
π

{2\pi}

and in the large length limit. In the small excess length case, we prove convergence to a fourth-order obstacle-type problem with integral constraint on the real line which we then solve. From the solution, we obtain the energy expansion

2
⁢
π

+

Θ
⁢

δ

1
3

+

o
⁢

(

δ

1
3

)

{2\pi+\Theta\delta^{\frac{1}{3}}+o(\delta^{\frac{1}{3}})}

when a curve has length

2
⁢
π

+
δ

{2\pi+\delta}

and determine first order coefficient

Θ
≈
37

{\Theta\approx 37}

. We present an application of the scaling result to buckling in two-layer cylindrical shells where we can determine an explicit bifurcation point between compression and buckling in terms of universal constants and material parameters scaling with the thickness of the inner shell.
Influence of the Print Layer Height in FDM Technology on the Rolling Force Value and the Print Time
Authors: Kiński Wojciech , Pietkiewicz Paweł
Published: February 2020

The paper presents a method and results of breaking of samples that undergo elongation, printed in the FDM (Fused Deposition Modelling) technology including various height of a layer. A method of description of the FDM print was described. A developed methodology of research was presented − it was analogous to the research on breaking steel samples. The aim of the research was investigation of the height of a single layer of print on the strength parameters of the produced object. The studies on samples printed with two types of filling were made. The obtained results were set and compared. Based on the research that was carried out, it may be concluded that the tensile strength of samples made in the FDM print technology is proportional to the thickness of a single layer of print.
Methods of Research of Foil Bearings in START-STOP Cycle in the Presence of Working Medium
Authors: Moczulak Bartosz , Miąskowski Wojciech
Published: February 2020

A method for testing sliding bearings with an elastic bearing liner was presented in the paper with a focus on the issue of selection of particular time intervals of the START-STOP test cycle. Then, results of the tests carried out according to the selected material combinations were presented. The working cycle of foil bearings tested on the test stand was performed in an automatic mode at the set number of sequences start-work-rundown-stop. Due to the highest use of sliding bearings during start and rundown of a machine, this type of tests is essential for selection of relevant sets of material for bearing elements. The article also presents the use of a thermo-visual camera for identification of additional thermal loads and manners of temperature stabilization in the test chamber.
Influence of temperature and potential range on Zn-Ni deposition properties formed by cyclic voltammetry electrodeposition in chloride bath solution
Authors: Beheshti Mohammadali , Ismail Mokhtar Che , Kakooei Saeid , Shahrestani Shohreh
Published: February 2020

This paper describes the study of electrodeposition process by cyclic voltammetry for Zn-Ni bimetallic coating on the X52 carbon steel substrate. Prior to the deposition at the bath temperatures of 25°C, 40°C, and 60°C, investigations were carried out to find the optimum potential range for zinc-nickel coatings with respect to the Ag/AgCl reference electrode. Scanning electron microscopy (SEM) coupled with energy dispersive X-ray (EDX) was used for surface morphology and elemental composition studies. The corrosion rate of the deposits was studied using the linear polarization resistance (LPR) method by immersing the samples (with and without coating) into 3.5% NaCl solution for 24 h. SEM and EDX results showed that the bath temperature has affected the formation of the microstructures and composition of coating. In addition, micro-cracks, nickel content, mobility of ions and compactness of microstructure increased by raising the bath temperature used for electrodeposition. The corrosion rate obtained from the LPR method can be correlated with the SEM/EDX analysis. The coating deposited at the temperature of 60°C including more content of nickel and micro-cracks led to lower corrosion resistance compared to the coating deposited at the bath solution temperatures of 25°C, 40°C, and non-coated X52 steel. Based on the results, the Zn-Ni coating deposited on the X52 steel substrate in the bath solution at 40°C presented the best performance due to more suitable achievements of microstructure compaction, composition, microcracks, and corrosion resistance observations.
Curved Rickard complexes and link homologies
Authors: Cautis Sabin , Lauda Aaron D. , Sussan Joshua
Published: February 2020

Rickard complexes in the context of categorified quantum groups can be used to construct braid group actions. We define and study certain natural deformations of these complexes which we call curved Rickard complexes. One application is to obtain deformations of link homologies which generalize those of Batson–Seed [3] [J. Batson and C. Seed, A link-splitting spectral sequence in Khovanov homology,
Duke Math. J. 164 2015, 5, 801–841] and Gorsky–Hogancamp [E. Gorsky and M. Hogancamp, Hilbert schemes and y-ification of Khovanov–Rozansky homology,
preprint 2017] to arbitrary representations/partitions. Another is to relate the deformed homology defined algebro-geometrically in [S. Cautis and J. Kamnitzer,
Knot homology via derived categories of coherent sheaves IV, colored links,
Quantum Topol. 8 2017, 2, 381–411] to categorified quantum groups (this was the original motivation for this paper).
Necessary conditions of applicability of Gaussian elimination to systems of equations over quasigroups
Authors: Polin Sergey V.
Published: February 2020

Previously, in the process of investigating systems of equations over the given family 𝔖 of quasigroup operations, the author proved the following fact: applicability of Gaussian elimination to the systems considered requires that generalized distributivity and transitivity identities hold for the operations from 𝔖. The present paper describes all sets of operations that satisfy these identities. The result obtained allows one to conclude that Gaussian elimination is applicable only if the system of equations is linear or may be reduced to a linear system.
Limit theorems for some classes of power series type distributions
Authors: Timashev Aleksandr N.
Published: February 2020

Several classes of distributions of power series type with finite and infinite radii of convergence are considered. For such distributions local limit theorems are obtained as the parameter of distribution tends to the right end of the interval of convergence. For the case when the convergence radius equals to 1, we prove an integral limit theorem on the convergence of distributions of random variables (1 − x)ξxas x → 1− to the gamma-distribution (ξx is a random variable with corresponding distribution of the power series type). The proofs are based on the steepest descent method.
Envelopes of circles and spacelike curves in the Lorentz–Minkowski 3-space
Authors: Pacheco Rui , Santos Susana D.
Published: February 2020

The isotropy projection establishes a correspondence between curves in the Lorentz–Minkowski space

𝐄
1
3

{\mathbf{E}_{1}^{3}}

and families of cycles in the Euclidean plane (i.e., curves in the Laguerre plane

ℒ
2

{\mathcal{L}^{2}}

). In this paper, we shall
give necessary and sufficient conditions for two given families of cycles to be related by a (extended) Laguerre transformation in terms of the well known Lorentzian invariants for smooth curves in

𝐄
1
3

{\mathbf{E}_{1}^{3}}

. We shall discuss the causal character of the second derivative of unit speed spacelike curves in

𝐄
1
3

{\mathbf{E}_{1}^{3}}

in terms of the geometry of the corresponding families of oriented circles and their envelopes. Several families of circles whose envelopes are well-known plane curves are investigated and their Laguerre invariants computed.
Free division rings of fractions of crossed products of groups with Conradian left-orders
Authors: Gräter Joachim
Published: February 2020

Let D be a division ring of fractions of a crossed product

F
⁢

[
G
,
η
,
α
]

{F[G,\eta,\alpha]}

, where F is a skew field
and G is a group with Conradian left-order

≤

{\leq}

. For D we introduce the notion of freeness with
respect to

≤

{\leq}

and show that D is free in this sense if and only if D can canonically be embedded
into the endomorphism ring of the right F-vector space

F
⁢

(

(
G
)

)

{F((G))}

of all formal power series in G over
F with respect to

≤

{\leq}

. From this we obtain that all division rings of fractions of

F
⁢

[
G
,
η
,
α
]

{F[G,\eta,\alpha]}

which are free with respect to at least one Conradian left-order of G are isomorphic and that they are
free with respect to any Conradian left-order of G. Moreover,

F
⁢

[
G
,
η
,
α
]

{F[G,\eta,\alpha]}

possesses a division
ring of fraction which is free in this sense if and only if the rational closure of

F
⁢

[
G
,
η
,
α
]

{F[G,\eta,\alpha]}

in
the endomorphism ring of the corresponding right F-vector space

F
⁢

(

(
G
)

)

{F((G))}

is a skew field.
Assessment the studies on the concept of Mizaj (temperament) in Persian Medicine
Authors: Akhtari Marjan , Moeini Reihaneh , Mojahedi Morteza , Gorji Narjes
Published: February 2020

Introduction

Mizaj or temperament is a main concept in Persian Medicine (PM), which the process of diagnosis, treatment and preventive prescriptions are developed based on it. In this study, the articles written on the concept of Mizaj were reviewed.

Method

Credited electronic resources, including Pubmed, Scopus, Cochrane Library and web-of-science were searched using keywords Temperament, Mizaj, Mizadj, Midzaj and Mezaj (with the concept of Mizaj in Persian and/or Greek medicine). Search results were limited to English articles, published in 1995–2017. The articles in which temperament had the psychoanalytic aspect or was based on Ayurveda or Chinese/Korean medicine were removed. A team of four PM experts evaluated the method and the results.

Results

Among the total of 32 articles were published in this field, 14 were review articles, 2 were on animal subject, 14 were on human subject and 2 were surveys for designing questionnaire for people’s Mizaj assessment. Most of review studies were just new versions of ancient Persian texts translated into English and the innovations on the subject were few. Studies on animal subject and developing questionnaires were also limited. In some human studies, use of standard questionnaires and homogenous methodology in Mizaj assessment was not considered.

Conclusions

It seems that studies on temperaments have increased in the past few years but are still at the forefront. In human studies a homogenous method for evaluating temperament has not been used and some of them failed to address the main concept of Mizaj in PM. Therefore, it is necessary to use the original category of Mizaj and to design standard method.
Echolocation calls of some bats of Gujarat, India
Authors: Shah Tariq Ahmed , Srinivasulu Chelmala
Published: February 2020

Bats play an important role by providing ecosystem services including pollination, seed dispersal, forest regeneration and insect pest control and also serve as bio-indicators. In the present study, we present an acoustic guide to the calls of nine species of bats from Gujarat belonging to families Rhinopomatidae (Rhinopoma hardwickii, Rhinopoma microphyllum), Emballonuridae (Taphozous melanopogon, Taphozous longimanus and Taphozous nudiventris), Rhinolophidaea (Rhinolophus lepidus), Hipposideridae (Hipposideros galeritus) and Vespertilionidae (Scotophilus heathii, Pipistrellus ceylonicus). Discriminant function analysis was used to classify the bat calls to the species level using leave-one-out cross validation. Analysis was carried out separately for constant frequency (CF) calls and frequency-modulated (FM) calls. Bats echolocating with CF calls were classified with 100% success, while in the case of FM calls, the calls were classified with 66.7% accuracy. In species-rich communities, care should be taken while using echolocation calls to identify bats producing FM calls. More such call libraries of bats from other parts of India are needed for non-invasive documentation of chiropteran fauna in different biogeographic zones.
The Analysis of Nutritional Habits of the Third Age Students in Poznań
Authors: Pracka Magdalena , Dziedziński Marcin , Kowalczewski Przemysław Łukasz
Published: February 2020

In recent years have seen increasing percentage of the elderly in the overall population. This has driven the attention to the lifestyle factors that influence the health and quality of life of this social group, including their nutrition and physical activity. Universities of the Third Age (U3A) are a valuable platform for the dissemination and broadening of the knowledge related to these topics. The nutritional habits of 61 U3A students in Poznań were evaluated on the basis of a modified KomPAN questionnaire. Their nutritional status was determined using the body mass index (BMI) and waist to hip ratio (WHR) indices. Nearly half of the respondents were overweight and 16% had first degree obesity. The WHR index in women was on average 0.8, while in men it was 1.01. Only 13% of the students declared regular eating, with 60% consuming 4-5 meals a day. Women were found to eat snacks between meals more often than men. It was also found that the majority of the elderly do not add salt to ready meals or sweeten beverages with sugars. Taking into account the observed nutritional problems and the occurrence of improper eating habits of the elderly, it is recommended to continue the education on the prevention of common diet-related diseased.
YKL-40 and neuron-specific enolase in neurodegeneration and neuroinflammation
Authors: Dichev Valentin , Kazakova Maria , Sarafian Victoria
Published: February 2020

Neurodegenerative diseases comprise a large number of disorders with high impact on human health. Neurodegenerative processes are caused by various etiological factors and differ in their clinical presentation. Neuroinflammation is widely discussed as both a cause and a consequence in the manifestation of these disorders. The interplay between the two entities is considered as a major contributor to the ongoing disease progression. An attentive search and implementation of new and reliable markers specific for the processes of inflammation and degeneration is still needed. YKL-40 is a secreted glycoprotein produced by activated glial cells during neuroinflammation. Neuron-specific enolase (NSE), expressed mainly by neuronal cells, is a long-standing marker for neuronal damage. The aim of this review is to summarize, clarify, and evaluate the potential significance and relationship between YKL-40 and NSE as biomarkers in the monitoring and prognosis of a set of neurological diseases, such as Alzheimer’s disease, Parkinson’s disease, Huntington’s disease, and multiple sclerosis. YKL-40 appears to be a more reliable biomarker in neurological diseases than NSE. The more prominent expression pattern of YKL-40 could be explained with the more obvious involvement of glial cells in pathological processes accompanying each neurodegenerative disease, whereas reduced NSE levels are likely related to low metabolic activity and increased death of neurons.
Das Ende des Elfenbeinturms? Citizen Science und die Rolle des Amateurs in der modernen Gesellschaft
Authors: Renda Charlotte
Published: February 2020

Seit ein paar Jahrzehnten erlebt die Einbindung von Amateuren in Forschungsprojekte unter dem Schlagwort „Citizen Science“ eine neue Konjunktur. In der Wissenschaftssoziologie wird dieses Phänomen vor allem als Anzeichen für Entdifferenzierungs- und Deprofessionalisierungstendenzen gelesen. Dieser Beitrag zeigt auf, dass der Amateur nicht als „Repräsentant“ der Gesellschaft in die Wissenschaft hineindrängt und ihre Problembezüge „erden“ kann, sondern dass die Wissenschaft selbst definierte Spielräume für Laienforscher schafft, in denen diese bestimmte Funktionen erfüllen und in denen das darüber hinaus reichende Einbringen systemfremder Motivlagen entmutigt und strukturell folgenlos gehalten wird. Dazu werden zunächst vier allgemeine Funktionen des Amateurs für gesellschaftliche Funktionssysteme (Rekrutierungsfunktion, Korrektivfunktion, Integrationsfunktion und Perspektivübernahmefunktion) vorgestellt, diskutiert und anschließend auf das Wissenschaftssystem bezogen.
Cold War Suburbs
Authors: Leslie Stuart W.
Published: February 2020

At the height of the Cold War, in both the US and the Soviet Union, top technical talent was ensconced in state-of-the-art laboratories set among new suburbs with cultural amenities. In Orange County, California, defense research labs were enticed by capitalist strategies; in the USSR, by government command. In both, the new white-collar suburbs made moves to the new centers attractive. The architecture of the housing as well as of the research labs reveals the faith in technology, shifting to a bunker mentality in the Vietnam era.

In the USSR, research institutes were set far from city centers. Their architecture and artworks were boldly modern, their engineers and scientists housed in modern apartments among parklands.

Reflecting declining military contracts by the 1990s, Orange County’s “think factories” were demolished or repurposed; upscale master-planned communities drew affluent commuters. Former Soviet research institutes morphed into universities and computer and electronics centers, surrounded by exclusive residential communities. There are striking parallels.
Switching Expression or Emotion: Emotional Labor Strategy on Negative Word of Mouth Mediated by Customer Satisfaction
Authors: Bakar Resekiani Mas , Amaliah Riska , Hidayati Nurul
Published: February 2020

This experimental study aimed to examine the effect of emotional labor strategy towards the negative WOM mediated by customer satisfaction. Research of emotional labor context has widely examined its impacts on service employees. The limitations in several studies proved that the opportunity in the indirect effect of emotional labor strategy on negative word of mouth (WOM) is still available. Sixty-two participants were involved in this study and divided into two groups (deep acting versus surface acting) by using videos. PROCESS model moderation proved that emotional labor strategy indirectly affects the negative WOM, mediated by customer satisfaction. This study showed that deep acting strategy can enhance customer satisfaction, therefore the negative WOM can be diminished. In contrast, surface acting strategy affects the decrease of customer satisfaction and thus it can raise the intention of the negative WOM. Emotion modification would be more effective through the deep acting strategy in transmitting the positive emotion for the customer, than modification the expression. The satisfaction felt by the customer will decrease the intention to spread negative information about the service provider to other customers.
Predicting the Relationship of Antecedent Variables of Intention to Use: Empirical Analysis on E-Money Application
Authors: Iswara Ganesha Triutomo , Wialdy Kevin , Sihombing Sabrina Oktaria
Published: February 2020

This study aims to predict the relationship of perceived usefulness, perceived ease of use, relative superiority, nature of transactions, and substitution to adoptions that affect intention to use of smart phone-based electronic money. The variables in this study are relative advantages, transaction nature, perceived usefulness, and perceived ease of use, substitution and adoption of electronic money. Data collection techniques in this study were conducted using a questionnaire with judgmental sampling method. The size of the respondents is 142 respondents. The data obtained is analyzed using Structural Equation Modeling (SEM). The results show that the six hypotheses are supported. The intention to use electronic money is also influenced by the adoption of electronic money. The adoption of electronic money is a significant predictor of intention to use electronic money. This study also provides limitations and suggestions for further research.
Ejercicios adecuados de resistencia abdominal: una herramienta para la prevención contra lumbalgias
Authors: Alvarez Bogantes Carlos
Published: February 2020

El propósito de este artículo fue el de analizar la técnica tradicional de los ejercicios abdominales, con el fin de dar recomendaciones alternativas que garanticen una buena ejecución sin riesgos. Además, presenta algunas recomendaciones que ayudarán a prescribir ejercicio abdominal para la salud.
Recomendaciones para la evaluación de la actividad física en población infantil
Authors: Álvarez Bogantes Carlos
Published: February 2020

El propósito de este artículo fue el de revisar los patrones de movimiento de los niños y las niñas y como estos pueden impactar la evaluación de la actividad física. Para el logro de la evaluación de esta se requiere de instrumentos que sean sensibles para que se detecte, codifique o registre la actividad física esporádica e intermitente de los niños y las niñas, sin olvidar las regulaciones que existen en el nivel científico. Varios de los instrumentos de más uso son: el autorreporte, la observación directa y el monitoreo de la frecuencia cardiaca. Los autorreportes requieren de habilidades de pensamiento abstracto y de buena memoria, lo que en edades tempranas no se ha desarrollado, por otro lado, la observación directa y el monitorio cardiaco, requieren de gran cantidad de tiempo y de alta tecnología para su aplicación, respectivamente. La recomendación más ampliamente extendida, es que se recurra a una combinación instrumentos, para garantizar la mayor cantidad de información y de validez de la investigación.
Efecto en el índice de discapacidad en pacientes adultos con vértigo paroxístico posicional benigno mediante la rehabilitación vestibular con movimiento humano
Authors: Chaverri Flores Sofía , Chaverri Polini Julián , Mora Campos Andrea
Published: February 2020

Propósito: determinar el efecto en el índice de discapacidad en pacientes adultos con vértigo paroxístico posicional benigno mediante la RV con el movimiento humano. Sujetos: seis sujetosque se han diagnosticados previamente con vértigo paroxístico posicional benigno  por un especialista en otorrinolaringología, con una edad promedio de 49.5 ± 14.22 años. Instrumentos: se utilizó el Dizziness Handicap Inventory, cuestionario para determinar el impacto en la calidad de vida en pacientes con dicha patología (Ceballos y Vargas, 2004). Procedimiento: se les sometió a una terapia vestibular durante cuatro semanas con ejercicios de habituación y equilibrio, en una modalidad semipresencial. Se realizaron dos mediciones, antes y después de terapia vestibular, y se valoró si hubo alguna mejoría en las dimensiones física, funcional y emocional. Análisis estadístico: se aplicó estadística descriptiva y una “t-student” de medidas repetidas para analizar los resultados obtenidos. Resultados: hubo diferencias estadísticamente significativas en la dimensión física entre el pretest (19.33 ± 4.67 puntos) y el postest (13 ± 7.24 puntos) (t = 2.65; p < 0.05). Por otro lado, no hubo diferencias significativas en las dimensiones funcional (t= 2.44; p>0.05), emocional (t= 2.37; p>0.05) y general (t= 2.55; p>0.05). Conclusión: la terapia vestibular con movimiento humano semipresencial mejoró el índice de discapacidad por vértigo (dimensión física) de sujetos con VPPB.
Hacia una gestión moderna del servicio deportivo y recreativo municipal costarricense
Authors: Mosquera Vargas Allan
Published: February 2020

El abordaje del tema de la gestión deportiva y recreativa desde un modelo integrador de las políticas y metodologías que son aplicadas en el contexto costarricense, surge a partir de la inquietud de la identificación de las necesidades reales  en el campo del deporte, la recreación y la promoción de la salud, por medio del movimiento en sus diferentes manifestaciones. Esto se ha encontrado a lo  largo de ocho años de trabajo, desde el Instituto Costarricense del Deporte y la Recreación (ICODER), en conjunto y en directo con las diferentes comunidades costarricenses, tanto rurales como urbanas, y en estas con sus diferentes organizaciones, llámese Asociaciones de Desarrollo Integral Comunal, Comités Cantonales de Deporte y Recreación (CCDR) y sus Comités Comunales, Alcaldías Municipales, ONG’s, entre muchas otras; se toma en cuenta especialmente, el sentir producto de la vivencia, que presentan los CCDR como organizaciones responsabilizadas por el Estado costarricense de promocionar y gestionar los servicios de deporte y recreación municipal con una conveniente oferta que responda a las necesidades de todos los clientes o usuarios. De esta manera, se intenta responder a la interrogante de cómo realizar una gestión eficiente por los Comités, que a su vez responda a las necesidades de los usuarios o clientes públicos en los municipios del  país, por medio de una propuesta de modelo de gestión que contribuya como un insumo más en el mejoramiento del tipo de servicio que ya existe y es gestionado por dichas organizaciones. Estructurado a partir de los elementos teóricos que definen hoy la organización y planificación, los tipos de planes en deporte y recreación como un servicio, se presenta el siguiente modelo de gestión costarricense.
Actividad física y género: un estudio comparativo entre los jóvenes de Monterrey, México y Zaragoza, España
Authors: Ceballos Gurrola Oswaldo , Álvarez Bermúdez Javier , Medina Rodríguez Rosa Elena
Published: February 2020

El propósito del estudio es comparar el gasto energético medio y los  niveles de actividad física entre los jóvenes de Monterrey, México y Zaragoza, España; considerando variables como género, tipo de escuela y momento de la semana (jornada escolar o fin de semana). Métodología: estudiantes adolescentes de 12 a 17 años, pertenecientes a las escuelas públicas y privadas de la ciudad de Monterrey (N= 396) y Zaragoza (N= 394). Se utilizó el cuestionario Four by one-day physical activity questionnaire con una fiabilidad de .89, realizado con un test-retest por su adaptación de formato. Resultados: existe tanto en Zaragoza como en Monterrey un número importante de escolares con bajos niveles de actividad física. Casi la mitad de los escolares se han tipificado como inactivos y muy inactivos. El gasto energético fue muy similar 37.52 kcal/kg/día ± 2.12 y 37.66 kcal/kg/día ± 2.95, en las dos ciudades señaladas. Conclusiones: en cuanto al género los hombres presentan mayores niveles de actividad física que las mujeres dato que coincide con la mayoría de los estudios. Los escolares realizan mayor nivel de actividad física durante la jornada escolar que en los fines de semana.
La eliminación de orina en respuesta a una ingesta de agua es consistente en personas bien hidratadas
Authors: Capitán Jiménez Catalina , Aragón Vargas Luis Fernando
Published: February 2020

Recientemente se ha propuesto un método sencillo para evaluar el estado agudo de hidratación en humanos, pero persisten varias preguntas con respecto a su confiabilidad, validez y utilidad práctica.Objetivo: establecer  la confiabilidad de un método simple para comprobar euhidratación, es decir, evaluar si este método puede ser usado como un indicador consistente del estado de hidratación de una persona.  Además, se buscaba evaluar el efecto que tiene el ejercicio sobre la producción de orina, cuando se mantiene el estado de euhidratación y se ingiere un volumen estandarizado de agua.Métodos: cinco hombres y cinco mujeres saludables y físicamente activos, con 22,5 ± 2,3 años (media ± desviación estándar), se presentaron al laboratorio después de un ayuno de 10 horas o más; en tres ocasiones, separadas por una semana de tiempo.  En las dos condiciones idénticas de reposo (EuA y EuB), permanecieron sentados durante 45 minutos.  En la condición de ejercicio (EuEjer) realizaron ejercicio intermitentemente en una cámara de clima controlado (temperatura media y humedad relativa = 32 ± 3° C y 65 ± 7%, respectivamente) por un lapso de 45 minutos, bebiendo agua para reponer las pérdidas por sudoración. El orden de los tratamientos fue aleatorio. Al terminar el tratamiento ingirieron un volumen de agua equivalente a 1,43% masa corporal (MC) en  30 minutos, y se recogieron y midieron los volúmenes de orina eliminados posteriormente cada 30 minutos durante 3 horas.Resultados: El volumen de orina eliminado para la condición EuEjer (1205 ± 399.5 mL) no fue diferente de EuB (1072.2±413.1 mL) ni  de EuA (1068 ± 382.87mL) (p= 0.44); las dos condiciones de reposo fueron prácticamente idénticas (p = 0,98), y presentaron una correlación intraclase fuerte (r = 0.849, p = 0.001).Conclusiones: Este método, además de simple, demostró ser consistente en sus mediciones, por lo que puede ser utilizado con la certeza de que las mediciones son válidas y confiables.
Rehidratación post-ejercicio con agua de coco: ¿igual o más efectiva que una bebida deportiva?
Authors: Pérez Idárraga Alexandra , Aragón Vargas Luis Fernando
Published: February 2020

Objetivo: comparar la efectividad rehidratante del agua de coco fresca, con el agua embotellada y una bebida deportiva.Metodología: once participantes de 22,0 ± 1,9 años y 65,6 ± 13,0 kg de masa corporal (promedio ± D.E), asistieron al laboratorio en tres ocasiones, separadas entre sí por una semana. En cada sesión se deshidrataron por ejercicio en el calor hasta perder 1,84 ± 0,2% de la masa corporal. Luego fueron rehidratados en una hora, con agua comercial embotellada (AE), una bebida deportiva (BD) o agua de coco (AC), utilizando un volumen equivalente al 120% del peso perdido. Se evaluaron las sensaciones percibidas relacionadas con la tolerancia y la aceptación de las bebidas. Se recolectó la orina eliminada durante tres horas post-rehidratación.Resultados: Hubo interacción entre las bebidas y el tiempo sobre la orina excretada (p=0,003), siendo el AE estadísticamente diferente al AC y la BD a los 30 y 60 min post-rehidratación (p<0,05). El volumen total de orina fue mayor con agua embotellada (625 ± 183 mL), en comparación con AC y BD (390 ± 73 mL y 416 ± 200 mL, respectivamente, p<0,002); AC y BD no fueron distintas entre sí (p>0,05). Esto produjo porcentajes de conservación de líquido diferentes para AE (56%), con respecto a BD (71%) y AC (71%) (p<0,001). No hubo interacción entre las bebidas y el tiempo sobre las sensaciones percibidas de tolerancia (p>0,05).La percepción de la dulzura fue menor para AE (p= 0,024). BD obtuvo mejores puntajes de sabor y aceptación general (p<0,05).Conclusiones: el agua de coco fresca resulta tan efectiva como una bebida deportiva para conservar el líquido consumido, teniendo una buena tolerancia y aceptación. Podría ser usada como una bebida rehidratante, cuando la persona la tenga disponible y le agrade su sabor.
Analysis of Student's Data using Rapid Miner
Authors: Sheena Angra  , Sachin Ahuja
Published: February 2020

Data mining offers a new advance to data analysis using techniques based on machine learning, together with the conventional methods collectively known as educational data mining (EDM). Educational Data Mining has turned up as an interesting and useful research area for finding methods to improve quality of education and to identify various patterns in educational settings. It is useful in extracting information of students, teachers, courses, administrators from educational institutes such as schools/ colleges/universities and helps to suggest interesting learning experiences to various stakeholders. This paper focuses on the applications of data mining in the field of education and implementation of three widely used data mining techniques using Rapid Miner on the data collected through a survey.
Performance Enhancement of DS-CDMA System using Extended BPSK Modulation Scheme
Authors: Barkha Pandey  , Raghu Harsh Kalia  , Monica Kaushik  , Monika Arora
Published: February 2020

In a last few decades there has been tremendous growth and a drastic rise in wireless communication technologies. The major issue that the world is facing today with the advent of so many sophisticated wireless communication devices is efficient utilization of the spectrum. Spectrum efficiency comes together with a tradeoff factor of energy consumption. Thus, the need of the hour is an energy and bandwidth efficient technique. DS-CDMA is one of the competitive and most investigated technique in wireless communication which caters the large demand at the same time with limited bandwidth. Existing modulation techniques does not promise to provide better performance in case of higher noise. Therefore, one looks for a better BER stipulated modulation format to improve and enhance the performance of the system. This article revisits conventional Binary phase shift keying method and compares its performance in terms of BER with a special Extended Binary Phase Shift Keying (EBPSK) modulation format for a DS- CDMA system. EBPSK scheme is flexible and simple which is easily integrated in a network and assures improved and enhanced performance.
Exploring Electronic Payment System Acceptibility Determinants: A Consumer Outlook
Authors: Akanksha Upadhyaya  , Bhajneet Kaur
Published: February 2020

The aim of this research paper is to explore the electronic payment system (EPS) acceptability determinants, from the consumer perspective. Exploratory factor analysis has been used to explore the factors based on different statements. The study has been conducted in North-West region of Delhi. Data has been collected from male-female of different age groups by using the questionnaire tool of data collection. For extraction of factors Principal component analyses and Varimax with Kaiser Normalization rotation method was used. The rotated component matrix shows best fitting of items to form a factor. As per the convergence of items, 4 factors were extracted and named. These factors are security concern, Knowledge, awareness and acceptability & convenience which are contributing for acceptability of electronic payment system among the consumers.
Assessment of Strength of Hollow Concrete Blocks with Holes Reinforced with Half Portion of Coconut Shells
Authors: Anu S Das  , Ansu V  , Megha P  , Nithin M Thomas  , Sachin A K
Published: February 2020

Natural building materials are diminishing day by day. Hence economical alternatives of natural building materials are necessary for sustainable development. Hollow concrete block was developed to reduce the use of natural building materials. Agricultural waste products like coconut shells from coconut industry have disposal problems causing environmental concerns. Various studies were done in the past, replacing a portion of the natural aggregates with broken coconut shells for manufacturing the hollow concrete blocks. In this study, we have developed a new method of forming the holes of hollow concrete blocks by placing stacks of half portion of coconut shells at the bottom with convex surface upwards to reinforce the holes by arch action. The results show that the coconut shell reinforced hollow concrete blocks have better strength as compared to open-graded hollow concrete blocks available in the market.
Integration of Online Social Network and E-Commerce Business through Facebook Pages
Authors: Balvinder  , Tripat Deep Singh Dua
Published: February 2020

The aim of this paper is to explore Facebook page options through which e-commerce companies can establish relationship with online social networking users. It explores the various options available on Facebook page like audience building, data analysis, paid promotions etc. Techniques for organic and paid promotion discussed to build the page audience. Comprehensive study on data insights provided by Facebook is tabulated. This paper highlights the factors for integration of Online Social Network and e-commerce to help ecommerce companies to focus on building audience and converting them into sale. A step by step implemen-tation starting from page setup, audience building and data analy-sis is presented.
Recent Advancement in Proportioning of No-fine Concrete - Review
Authors: Rekha Singh  , Sanjay Goel
Published: February 2020

The paper highlight characteristics of no fine concrete (NFC) by evaluating and interpreting the research work undertaken by research scholars around world in past. It explains the approach for better performances. It helps to understand and identify the difference between knowledge and actual performance on ground which stops it from wide and acceptable application throughout the globe. A comprehensive investigation of proportioning of no fine Concrete has been discussed. Identification of relationship between mechanical properties with its design and pore structure of NFC will help us in studying ways of its better utilization. The specific reference has been made for India to understand level of research & development in laboratories and status of different applications at different levels.
Empirical models for permanent deformation of cement-grouted bituminous mixes
Authors: Reddy Daka Sita Rami , Reddy Kusam Sudhakar
Published: February 2020

Cement-grouted bituminous (CGB) mix is a semi-flexible type of pavement comprising an open-graded (porous) bituminous mix grouted with a cementitious mortar. CGB mixes have the advantages of both flexible and rigid pavements. This hybrid material of bituminous mix and cement grout offers better rut resistance and is more resistant to fuel and oil spillage compared to conventional bituminous mixes. This paper presents the details of different investigations carried out for the evaluation of the permanent deformation characteristics of different CGB mixes. A conventional bituminous concrete mix was also tested for comparison. The permanent deformation susceptibility of different CGB mixes was evaluated in a wheel tracking test facility. The rut depth developed after 20 000 load applications in the specimens conditioned at 60°C was correlated to different porous bituminous mix and CGB mix parameters. The empirical models presented in this paper will be useful for estimating the relative rutting performance of different CGB mixes in terms of their design parameters such as aggregate gradation, binder content and air voids in the mix.
Probabilistic analysis of local instability between soil nails
Authors: Chhun Kean Thai , Jang Hyun-Ick , Yune Chan-Young
Published: February 2020

The objective of this study was to evaluate the probability of local failure between soil nails using a Monte Carlo simulation. The factor of safety (FoS) against local failure in a slope reinforced with soil nails was calculated based on the limit equilibrium method. Random soil characteristic variables were generated based on their distributions and, in accordance with these variables, the FoS of nailed slopes with various slope angles (40–65°), nail inclinations (0–45°), nail spacings (1–8 m), soil thicknesses (1–10 m) and ground conditions (dry, saturated and seepage conditions) was examined. The results showed that the parameters for nail and ground conditions had an influence on the probability of failure (Pf). The effect of wire mesh was also investigated and the Pf of local failure between nails decreased due to the presence of the wire mesh. It was also found that, to achieve Pf < 0·5 without a wire mesh, in the design of nails considering local failure, the nail spacing should not exceed 1·75, 1·50 and 1·25 m for slope angles of 55, 60 and 65°, respectively. With wire mesh, a nail spacing up to 2 m is permissible for Pf < 0·5.
Çocuk Edebiyatı ve Duyarlık Eğitimi
Authors: KANMAZ Fatma Esra
Published: February 2020

Çocuk edebiyatı ürünleri, örtük
iletileri yoluyla okurlarını duygu ve düşünce yönünden zenginleştirir, onlara
başkalarıyla eşduyum kurma olanağı tanır. Prof. Dr. Canan Aslan’ın yazmış
olduğu “Çocuk Edebiyatı ve Duyarlık Eğitimi” adlı kitap, bu gerçeklikten yola
çıkarak önce “çocuk edebiyatı” ve “duyarlık” kavramlarıyla ilgili kavramsal bir
çerçeve çizmekte ardından da bir çocuk edebiyatı yapıtı üzerinden bu kavramları
somutlaştırmaktadır. Çalışmamızda, Aslan’ın beş bölümden oluşan kitabı; yazılış
amacı, alandaki yeri, içeriği bakımından ele alınıp tanıtılmaya çalışılmıştır.
I.M. Kamov - an Enthusiast and an Eminent Personality of Practice-Oriented Education in Irkutsk
Authors: Sukhodolov Alexander , Maidachevsky Dmitry
Published: February 2020

The article reconstructs the unknown life and activity facts about Ilya M. Kamov (1873–1942) an eminent personality of practice-oriented education in Irkutsk in the first quarter of the 20th century. The authors focus their attention on the «works and days» of the teacher dedicated to Irkutsk Industrial College and also to the City’s Commercial College and Irkutsk Industrial and Economic Institute founded on the basis of the latter, where he was Director. On the pages of this article, we can see the eminent figure of a real enthusiast oriented at practical professional education. The content of the article is beyond the scope of the historical storyline reconstructed in it. The historical events of secondary and higher professional school are considered in the wider context of the period of the so called «pragmatic» turn in pre- and post-revolutionary Russian education, which meant submission of the country’s educational policy to the needs of modernization and, namely, of industrialization. Even the professional activity of the main character of the article reflects the clear line of institutional thinking of practice-oriented education development of that period from technical education to commercial one with their subsequent amalgamation in the framework of industrial and economic education, on the one hand, and from secondary professional to higher education, on the other hand.
Transformations in the Agrarian Sector as a Method of Problem Resolution of the Peasant Land Shortages in Russia (Based on the Research on Agrarian Reforms in Russia in Second Half of XIX - Beginning of the XX Centuries)
Authors: Lapytskaya Marina
Published: February 2020

The article analyzes the historical peasant situation in the late XIX — early XX centuries and the problems of the agrarian system that led to the land shortage among the peasants. In addition, the research examined the roots of the land shortage problems and the possible ways to solve those. The author also investigated the reasons that contributed to the low level of agriculture development. The study reviewed the mechanism of a causal relationship between industrial development and agriculture. The article described the features of the lease of additional land allotments and how it they affected the peasants. The study considered a possibility of land nationalization as a way to address the land shortage problem. The article describes the mechanisms and steps actually taken by the government to eliminate the land shortages in Russia: resettlement programs for the peasants and the establishment of the Peasant Bank. The study also highlighted the specific measures that really could affect the development of agrarian system in the long run. The research conducted a comprehensive analysis of the previous scientific studies of the agrarian reforms implemented in the late XIX — early XX centuries. The high interest to this topic is driven by the interest of the Russian economic theory to the land shortage issue. Agricultural and economic research used in the article utilized a theoretical and historical approach. It offers an opportunity to comprehend the past economic processes and phenomena from modern day perspective, and vice versa — to understand the modern world from the perspective of the past historical experience.
Features of Development of the Raw Material Sector of the Economy in the Zabaikalsk Territory during the Period of Existence of the Far Eastern Republic (1920-1922)
Authors: Bespalko Denis
Published: February 2020

The article analyzed understudied state policy of the government of Far Eastern Republic aimed at state monopolization of the areas of harvesting, storage and trade of fur and raw materials in the Transbaikal region. The research conducted a comprehensive analysis of legislative enactments that evolved from strictly prohibitive measures against free trade operations of fur-raw material market to cancellation of the restrictions. The author analyzed government regulations, the consequences of the ban of the free trade of raw materials and their free export abroad. All kinds of fur, medicinal-technical raw materials and raw materials of other origin, obtained from domestic breeds of animals were subject to those state regulations. This policy had very limited effect due to the absence of an extensive branch of the executive power on the ground and unwillingness of the population to obey the laws that infringed on their trade rights. With entry into force of various kinds of bans, the black market of the fur-raw material operations flourished. Along the border with China the smuggling did not stop. The attempt to deal with the criminal phenomenon failed because the customs was in a poorly organized state. Eventually the government and the Council of Ministers of the Republic realized that the existing regulations hindered the development of the raw materials sector of the economy and lead to public discontent. They eventually reversed the monopoly law and a number of related enactments and reintroduced free trade of furs and raw materials. The author concluded that this emergency policy was flawed. Due to the general lack of preparation of the executive branch of government, legislative measures aimed at the state monopolization of the commodity market failed to bring under state control the procurement system and the most important counter-currency. As a result, the market returned to free trade relations.
The Contribution of the Western Siberia Workers and Employees Movement to Weapons and Military Technical Equipment Building for the Red Army during the Great Patriotic War
Authors: Savitsky Ivan
Published: February 2020

The article considers the patriotic movement of the workers, employees and of the whole population of Western Siberia to raise funds to build more military technical equipment for the Red Army. They worked voluntarily on Sundays, overproduced at plants and contributed all their earnings and personal savings, nonferrous metals and things to building aircraft, armored vehicles, ships and submarines, Katyusha rocket launchers, armored trains and other weapons and military technical equipment. One of the peculiarities of the Western Siberia workers and employees activities was their raising funds to build military technical equipment which was manufactured in the region. Thus, aircraft were manufactured in Novosibirsk and Omsk, armored vehicles in Omsk and Altay Territory, torpedo boats at Tyumen shipyard etc. According to the incomplete data, the biggest contribution to military technical equipment building was made by the workers of Novosibirsk Region (232,931,448 rubles); Kemerovo Region (266,120,000 rubles); Altay Territory (165,742,767 rubles). It was registered that on 28 February 1943, the inhabitants of Omsk raised 48,584,042 rubles to build military technical equipment. The exception is Katyusha rocket launchers which were manufactured in Ural Territory and ammunition for them was made in Western Siberia, and submarines.
South African Journal of Sports Medicine: 2020 what lies ahead?
Authors: Lambert Mike
Published: February 2020

no abstract