bluuebunny/crossref_metadata_2025 huggingface dataset:
Calidad del servicio de internet y satisfacción del cliente
Authors: Moreno Cardenas Edison Yuver
Published: February 2020

The main objective was to identify the variation of the average of customer satisfaction in proportion to the average of Internet service quality. The population consisted of 13 corporate portfolio customers of Internet service provider América Móvil Perú S. A. C. Likewise, the variables used were quality of Internet service and customer satisfaction. The non-experimental correlational design was used for this purpose in the form of surveys, which provided results regarding the variation between the variables. The research obtained a result of 0.77, which indicates that there is a positive proportional variation between both variables. Furthermore, there is a high level of correlation and, when performing the analysis, the bilateral significance level was 0.000, less than 0.05. It is concluded that the average of Internet service quality varies in proportion to the average of customer satisfaction.
Elementos de contaminación ambiental generados por la extracción informal de carbón y alternativas de extracción sostenible en el distrito de Lucma, Provincia Gran Chimú – Región La Libertad
Authors: Guevara Alvarado Nicolás
Published: February 2020

En el presente artículo se realizaron los siguientes procedimientos: una evaluación geológico–minera, toma de cinco muestras de agua (A1-A5), y cinco muestras de suelo (S1-S5) para definir los niveles de contaminación.

Los resultados de análisis de las muestras de agua, fueron cotejados con los estándares de calidad ambiental (ECA) del Ministerio del Ambiente (MINAM). Considerando el análisis de agua para uso poblacional, se detectó aluminio (Al) y hierro (Fe) como elementos que han sobrepasado los estándares de calidad; mientras que, en el análisis de agua para bebida de animales y riego de vegetales, los valores estuvieron por debajo de los estándares establecidos.

Los resultados, con respecto a la toma de cinco muestras de suelo, no sobrepasaron los niveles de los Estándares de Calidad Ambiental (ECA), debido a que los valores estuvieron por debajo de los estándares establecidos. En vista de los resultados antes indicados, se ha considerado la normativa holandesa que considera otros parámetros de control, éstos determinaron que sí existe contaminación ambiental en los elementos de Hg, As, Cd, Co, Mo, Sb, y V. (Crommentuijn et al.1997)

Con la apertura adecuada de labores subterráneas en zonas aparentes, la conservación y uso adecuado de explosivos e implementos de seguridad, con el control y la minimización de material particulado, la comercialización de carbón de manera adecuada y el control rígido de mineral se logrará, establecer una extracción minera sostenible y responsable.

Con monitoreos y supervisión permanente mediante personal técnico calificado, se logrará disminuir y/o eliminar la contaminación ambiental en el agua, suelo y en la actividad minera informal.
Problemática de la contaminacion de plomo ocupacional en los laboratorios de ensayos al fuego de minerales auríferos
Authors: Peragallo Barrios Victor Hugo
Published: February 2020

La contaminación ocupacional de plomo en Perú es un problema grave que hasta el presente no ha sido adecuadamente regulado en el Perú. Las principales actividades que generan contaminación ocupacional de dicho metal abarcan procesos como fabricación de baterías (Ramírez, 2008), fundición de chatarra de plomo, ensayos al fuego para cuantificar oro y plata en la minería. El objetivo de este artículo es identificar las estrategias que deben considerar en la contaminación por plomo en los laboratorios de ensayos al fuego en la determinación analítica de oro y plata, y analizar sus deficiencias (Mérida, 2013). Los datos sobre la contaminación por plomo en los laboratorios de pruebas de ensayos al fuego en Perú son difíciles de encontrar en la literatura disponible.
Salud bucal en América Latina
Authors: Mattos-Vela Manuel Antonio , Moromi Nakata Hilda
Published: February 2020

Las enfermedades dentales se encuentran entre las más prevalentes del mundo, además presentan una carga de tratamiento general en aumento, especialmente en países de bajos y medianos ingresos, por ello, existe una gran necesidad de proceder de manera oportuna para proporcionar evidencia procesable y políticas para mejorar la atención de la salud bucal a nivel mundial 1.
Calidad de las investigaciones basadas en encuestas: directrices para buenos informes
Authors: Mattos-Vela Manuel Antonio , Alfaro Carballido Dahiana
Published: February 2020

La evaluación de la calidad de los estudios es muy importante en las diferentes disciplinas científicas. Los estudios basados en encuestas al igual que otros tipos de estudio requieren altos estándares de calidad tanto en su ejecución como en su informe, sin embargo, existe evidencia que indica que no es así. Se han propuesto muchas herramientas que ayudan a valorar la calidad del informe de los estudios que utilizan encuestas, la gran mayoría no están validadas ni cuentan con un consenso general para su uso; por lo cual, el objetivo de esta nota científica es presentar las directrices más aceptadas (SURGE y CHERRIES) que ayuden a informar este tipo de estudios de manera eficaz y transparente.
La salud bucal en el marco de la crisis venezolana
Authors: Romero Uzcátegui Yajaira
Published: February 2020

Para muchos países latinoamericanos, las enfermedades bucales han sido un tema desatendido y rara vez visto como una prioridad en las políticas de salud. En el caso venezolano, la situación de la salud bucal presenta características particulares, como consecuencia de la crisis económica que ha impactado todos los ámbitos de la vida social. El propósito de esta nota científica está dirigido a analizar la situación del componente bucal de la salud en la población venezolana en el marco de la crisis nacional y de las contradicciones entre el discurso oficial y la aplicación de las políticas públicas y de salud. Se desconoce la información acerca de lo que está ocurriendo con relación al funcionamiento de los servicios odontológicos en la red asistencial pública y privada y se hace necesario el desarrollo de estrategias que permitan a los profesionales de la odontología comprometidos con la salud colectiva, dar respuestas eficaces ante las nuevas necesidades de la población.
Diferencias en memoria y funciones ejecutivas en niños con diferente nivel lector de Huancavelica y Lima- Callao
Authors: Canales Gabriel Ricardo , Velarde Consoli Esther , Lingán Huamán Katherine Susana , Ramírez Mendoza Juan
Published: February 2020

El estudio buscó determinar si existen diferencias en memoria de trabajo y funciones neuropsicológicas ejecutivas en niños con diferente nivel lector pertenecientes a realidades socio- culturales distintas. La muestra fue de 71 alumnos de Huancavelica y 82 alumnos de Lima y Callao del 3er. Y 4 to. grado de primaria, todos de Instituciones Educativas Públicas. Fue un estudio descriptivo comparativo. Primero se evaluaron los procesos de la lectura en los grupos de Huancavelica y Lima- Callao con el PROLEC- R (Cuetos, Rodríguez, Ruano y Arribas, 2007), encontrándose diferencias significativas. Sobre esa base se procedió a evaluar la Memoria de trabajo, con subtests de la Prueba WISC- IV (Test de Inteligencia de Wechsler-2006) y las funciones neuropsicológicas ejecutivas con algunos tests del BANFE (Flores-Ostrosky, 2012) en ambos grupos. Los resultados mostraron diferencias significativas en Memoria de Trabajo a favor del grupo de alumnos de Lima- Callao. No se hallaron diferencias significativas en funciones neuropsicológicas ejecutivas. Finalmente, no se halló correlación entre los procesos de la lectura y funciones neuropsicológicas ejecutivas. Se discuten los resultados y sus implicaciones.
Relaciones interpersonales afectivas y desempeño laboral según variables sociodemográficas de los trabajadores de radio y televisión de Lima Metropolitana
Authors: Bejarano Paredes Manuel
Published: February 2020

La presente investigación estudia las diferencias entre las relaciones interpersonales y el desempeño laboral según variables sociodemográficas en trabajadores de tres empresas estatales de radio y televisión en Lima Metropolitana, la muestra estuvo constituida por 90 trabajadores (44% varones y 56% mujeres). Para la recolección de datos se utilizó el Cuestionario de Conductas de Desempeño Laboral y la Escala de Relaciones Interpersonales Afectivas en el Trabajo (SRIT), se identificó a través del estadístico de Kolmogorov-Smirnov que los datos recogidos presentaban características no paramétricas por lo que el análisis de resultados se hizo mediante el estadístico Rho de Spearman d U de Man Whitney y el estadístico Kruskal-Wallis. Los resultados indicaron que no existe una correlación significativa entre las entre las relaciones interpersonales afectivas y el desempeño laboral, un análisis más minucioso de sus componentes arroja una relación moderada entre ellas. Asimismo, la comparación entre las relaciones interpersonales afectivas y el desempeño laboral, con las variables sociodemográficas no mostraron relación significativa.
Estado del arte Acerca del proceso de adaptación a la escuela De los niños menores de 3 años
Authors: Burneo Farfán Laura Elena
Published: February 2020

El objetivo de este artículo es divulgar destacadas investigaciones que se han venido realizando durante los últimos diez años en el campo del Proceso de Adaptación a la Escuela de los niños menores de 3 años. Se trata de un periodo crítico al cual quedan expuestos nuestros niños dada la creciente participación de la mujer en el ámbito laboral. Este proceso explica la transición del niño de una vida hogareña con una atención personalizada de los padres o sustitutos rodeada de mucho afecto a un ambiente educativo.

En este trabajo se hace una revisión del tema dividiéndolo en cuatro factores que pueden determinar la calidad de dicha adaptación: la sobreprotección familiar al niño, el apego infantil, el cambio de ambiente y el rol de los padres. Se espera que esta data sea de utilidad para los investigadores interesados en explorar, describir, correlacionar, y explicar la dinámica socioemocional en la que se desenvuelve este interesante periodo en la vida de las personas.
Efecto de la suplementación con ensilaje de cáscara de naranja (Citrus sinensis L) sobre algunos parámetros metabólicos en vacas de leche
Authors: Cruz Carrillo Anastasia , Rodríguez Salgado Angela Mireya , Pineda Pulido Camilo
Published: February 2020

El objetivo de este trabajo fue determinar el efecto del ensilaje de naranja/avena y de solo avena en el comportamiento metabólico de vacas de leche en producción durante la época de verano y sobre la calidad composicional de la leche, buscando alternativas de alimentación para la época de verano sin mayor inversión. Se usaron 20 vacas sanas en producción, divididas en dos grupos al azar. Las vacas del primer grupo se suplementaron con ensilaje de naranja/avena y en el segundo con ensilaje de solo avena por 30 días. Los animales mantuvieron su estado metabólico, condición corporal y producción de leche. El colesterol fue el único parámetro que se encontró más alto en los animales suplementados con ensilaje de naranja/avena. Se concluye que ambos tipos de ensilaje para suplementación son equivalentes, pero la aceptación por parte de los animales del ensilaje de naranja/avena fue notoriamente superior.
Detección hematológica de Anaplasma phagocytophilum en caballos de la provincia de Chiclayo, Perú
Authors: Masgo C. Deysi , Hoyos S. Luis , Li E. Olga , Gómez P. Luis , Ramires V. Leyla , Álvarez M. Grecia , Cervantes S. Miguel , Vásquez Y. Álvaro
Published: February 2020

El objetivo del estudio fue detectar Anaplasma phagocytophilum en caballos de la provincia de Chiclayo, Perú, utilizando técnicas hematológicas. Se colectaron 100 muestras de sangre de caballos aparentemente sanos y con antecedentes de exposición a garrapatas. El estudio hematológico consistió en la realización del hemograma y la evaluación de frotis sanguíneos teñidos con Wright y naranja de acridina para la búsqueda de cuerpos de inclusión y mórulas del agente patógeno. El 9% de caballos (9/100) presentaron estructuras compatibles con cuerpos de inclusión o mórulas de A. phagocytophilum, por lo que fueron considerados como “positivos”. Este grupo de animales presentó leves alteraciones en la serie leucocítica y trombocítica. Los hallazgos indican la presencia de A. phagocytophilum en caballos en el Perú.
Schistosomus reflexus en un felino: reporte de caso
Authors: Patiño A. , Aguirre J.C. , Gallego R.S. , Zambrano R. , Buitrago J.A.
Published: February 2020

Se presenta el caso de una hembra felina de raza mestiza de 5 años en su primer parto llevada a consulta. La gata tenía un mortinato presente en el canal de parto el cual se extrae manualmente. Un segundo cachorro es expulsado vivo, pero por su la inviabilidad clínica se procedió a la eutanasia. Las dos crías presentaron una malformación en la región abdominal con exposición de algunas vísceras, considerada como el síndrome de Schistosomus reflexus. Se realizó la evaluación diagnóstica radiológica y por necropsia del segundo cachorro encontrando un defecto de cierre de la línea media abdominal con exposición de vísceras (intestino delgado, hígado, riñón derecho y bazo entre otros). En la evaluación radiológica se evidenció eventración de órganos abdominales sin diferenciación clara entre ellos, cifosis en el segmento toracolumbar, lordosis en la porción lumbar y oligodactilia en el miembro posterior derecho.
Variaciones fenotípicas de las características textiles de fibra predescerdada de vicuña
Authors: Pinares Rubén , Yauri Wilder Vladimir
Published: February 2020

El objetivo del estudio fue evaluar el efecto de la edad y el sexo de la vicuña sobre el diámetro medio de fibra (DMF), finura al hilado, índice de curvatura, longitud de fibra y perfil del diámetro de fibra; asimismo calcular las correlaciones fenotípicas entre las características textiles de fibra. Muestras predescerdadas (n=88) fueron analizadas con el equipo OFDA 2000. En el modelo estadístico se consideró como efectos fijos a la edad, el sexo y la interacción edad:sexo. El sexo tuvo efecto significativo sobre las variaciones fenotípicas del DMF, perfil de diámetro máximo y mínimo; asimismo, la edad tuvo efecto significativo sobre el DMF, finura al hilado y perfil de diámetro mínimo. Sin embargo, la interacción de sexo y edad no tuvo efecto sobre las características estudiadas. Las correlaciones fenotípicas fueron significativas y positivas entre DMF y finura al hilado, finura al hilado y desviación estándar de diámetro, desviación estándar y coeficiente de variación de diámetro, desviación estándar de diámetro y diferencia de diámetro en perfil de fibra. Las correlaciones fenotípicas fueron negativas: porcentaje de fibras <30 µm con desviación estándar de diámetro, coeficiente de variación de diámetro y finura al hilado. Además, existe variabilidad fenotípica de DMF y perfil del diámetro de fibra en las vicuñas adultas y jóvenes. La edad, el sexo y el predescerdado influyeron sobre algunas características relacionadas a la finura y el confort de la fibra.
Estimates of the Effects of Emigration on the Labour Market
Authors: Kasnauskienė Gindra , Šiaudvytis Tomas
Published: February 2020

Migration flows have increased since the EU enlargement in 2004. In many European countries, they are sufficiently large to have significant economic effects. These effects are among the most popular topics in public debate.

In this paper, the authors attempt to quantify the effects of emigration on wages, welfare and in­come redistribution in the selected new EU member states. Emigration reduces labour supply and in­creases national wage generating income redistribu­tion from the owners of capital to the labour force. Emigration also results in welfare loss as emigrants no longer produce output in their home country. The au­thors of the article adopt a simple theoretical model of the labour market which allows quantifying these effects through the use of basic economic and demo­graphic statistics.

The research on the effects of emigration on wages uses a simple supply and demand framework, where labour demand is derived from a marginal pro­ductivity condition using the Cobb–Douglas produc­tion function. The authors also assume perfectly ine­lastic labour supply, in case of which the effect of emigration on wages is entirely determined by labour demand. Wage elasticity estimation uses the fact that the capital share parameter in the Cobb–Douglas function also measures labour demand elasticity. This property of the production function allows the au­thors to estimate the elasticity using national ac­counts data.

The estimates of labour demand (wage) elas­ticity for Lithuania range from 0.44 to 0.55, implying that due to emigration wages might have increased from 0.75 to 0.94 per cent a year, on average. In the period of 2001–2008, emigration might have resulted in a wage increase of 5.9 to 7.3 per cent. However, these estimates require caution as the beginning of the period was characterised by high unemployment. Emigration loss amounts to 0.4 per cent of GDP, and 2.8 per cent of GDP is redistributed to labour every year.

Due to the poor quality of migration data, the impact of emigration on wages, welfare and income redistribution in other countries is most likely signifi­cantly underestimated. The assumption that the share of declared emigration is similar across countries would imply that those affected by emigration the most are Slovenia, Czech Republic and Estonia.
Efficient Indexation of Social Insurance Pensions
Authors: Bartkus Algirdas
Published: February 2020

This paper tries to formulate conclusions about the indexation of old-age pensions. Pensions can be adjusted and indexed taking into consideration a wage increase. The point of indexation with regard to wages lies in the increment of pensions on to a new, higher nominal level of consumption opportunities (the pension increases), but leaving it at the same relative or potential level of consumption opportuni­ties (the pensions-to-earnings ratio remains constant). Pensions can also be adjusted and indexed according to an increase in the price level. The adjustment of pensions with respect to the price level maintains the real level of consumption (a person is always able to buy the same set of goods). The aim of this study is to identify the conditions of efficient indexation; to summarize the methods of indexation; to draw con­clusions as to which of these methods maximizes the wealth of taxpayers.
Comparative Analysis of Major Travel and Tourism Indicators: Estonia, Latvia and Lithuania, 2010
Authors: Vanaga Iveta
Published: February 2020

The target of the paper is to find the similarities and particularities of the travel and tourism market in eachBaltic country by comparing the main statistical indicators. For this purpose, bibliography review/analysis, induction and deduction,as well as statistical analysis methods such as grouping, processing and comparison methods are used. The researchshows that Estonia features the highest travel and tourism industry’s share both in the total GDP of the country and employment,exceeding the average figures of the EU countries. Estonia is a leader among the Baltic countries both in terms of thenumber of foreign visitors with an overnight stay and the total number of nights spent in tourist accommodation. Lithuaniahas developed the most even distribution of tourist accommodation within the country – in contradistinction to Estonia andLatvia that face too high concentration of tourists in capital cities. Riga airport is the leading airport in the Baltic regionshowing the highest results for direct and transit passengers volume, aircraft movements and the number of direct destinationsoffered. Estonia not only is very successful in using its seafront location and developing an effective ferry route networkbut also has positioned Tallinn as one of the Baltic Sea cruise destinations that is offered by the largest cruise companies.
Lithuanian Intra-Industry Trade with the Main Partner Countries
Authors: Rimkus Vladas
Published: February 2020

The paper deals with the analysis of Lithuanian intra-industry trade. The largest foreign trade partner countriesselected for the analysis are as follows: Russia, Germany, Latvia, and Poland. An increase in the extent of intra-industry tradestimulates interest in this phenomenon. Traditional trade theories cannot explain why some countries trade in differentiatedproducts. Some economists think that intra-industry trade is based on monopolistic competition and economies of scale,which point that any countries located close to each other will trade with each other in similar products the more intensively,the more they are similar to each other with regard to both economic development and geographical resources. Variousindices are used to assess the intensiveness of intra-industry trade. Calculations provided in the paper are carried out applyingthe Grubel ˗ Lloyd index, which is the most frequently used for this purpose. The paper analyses changes in trade during theperiod of 2005 ˗ 2011 based on the data of Statistics Lithuania according to the Combined Nomenclature of goods. Theobject of research is trade between Lithuania and the above-mentioned countries. The methods of research are as follows:analysis of scientific literature and description, analysis of Lithuanian foreign trade statistics.
The Measurement of Real Expenditure on R&D for Ukraine
Authors: Zhukovich Inna , Ryzhkova Julia
Published: February 2020

The measurement of real research and development (R&D) expenditures is an issue for discussion, especially forcountries with a high inflation, when general price indices do not correctly reflect trends in the cost of performing R&D. Theaim of this paper is to present the procedure for the calculation of R&D price indices for Ukraine, which takes into accountspecific features of the country’s research system. The paper analyses the theoretical background of the measurement of realR&D expenditures and methodological approaches to the calculation of R&D price indices. We have applied a FrascatiManual recommendation, according to which components of R&D expenditure are deflated by specific price indices. Theexperimental calculations of real R&D expenditures for Ukraine for the period 2001-2010 and the construction of R&D priceindices are presented in this paper. The results obtained are new for Ukrainian statistics and they will be used in R&Dstatistics practice in Ukraine.
Population Ageing and Its Challenges: Filial Responsibilities for Elderly Parents in Lithuania
Authors: Gedvilaitė-Kordušienė Margarita
Published: February 2020

The paper addresses the questions of demographic ageing at the beginning of the 21st century and the attitudes about who should be responsible for the elderly care in Lithuania. The analysis of age structure changes revealed three ways of demographic ageing: ‘from below’ (the youngest part of the population is decreasing), ‘from above’ (the oldest part of the population is increasing), and decrease of the young working-age population. The analysis of ageing in Lithuania in the context of the EU revealed that Lithuania has moved from the group of the demographically youngest countries to the group of the oldest ones. This has happened in one decade and illustrates rapid ageing in Lithuania. Within such context, the question “Who should be responsible for the elderly care?” is of particular importance. Based on the second wave of the Generations and Gender Survey (conducted in 2009), the responses who should take care of the elderly are contradictory. The biggest part of respondents is in favour of the division of responsibilities for the elderly care between family and society. The same part of respondents considers this to be family responsibility. Meanwhile, financial support is mainly considered to be the responsibility of the society. The analysis of filial responsibilities for elderly parents revealed a high level of normative solidarity. Most respondents agree with the statement where the support type for elderly parents is not defined (i.e. that children should take responsibility for caring for their parents when parents are in need). When the types of support are defined, the respondents are also likely to agree (i.e. children ought to provide financial help for their parents when their parents are having financial difficulties; children should have their parents to live with them when parents can no longer look after themselves). Less agreement was found on the statement requiring the reorganisation of children’s lives in order to fulfil filial responsibilities (i.e. that children should adjust their working lives to the needs of their parents) and on the statement measuring gender division in care provision for elderly parents (i.e. when parents are in need, daughters should take more caring responsibility than sons). The differences in attitudes between children’s, parents’ and grandparents’ generations were not statistically significant. The logistic regressions revealed that significant predictors enhancing the chances of agreement on filial responsibilities are respondents’ gender, age, partnership and occupational statuses and type of residential area.
Two-Way Anova for the Study of Revenue Mobilization Inequalities
Authors: Darkwah Kwaku F. , Tawiah Richard , Adu-Gyamfi Maxwell
Published: February 2020

The Ghanaian informal sector is characterized by underemployment, bad working conditions, uncertain workrelationships and low earnings. This sector employs 80% of the workforce. Consequently, establishing an efficient tax systemthat can raise sufficient revenue to finance essential expenditures without recourse to government borrowing has been achallenge. Using time series data extracted from a revenue mobilization unit in Ghana, this paper examines the inequalities infour revenue mobilization instruments, namely self-employed tax, company tax, Pay As You Earn (PAYE) tax andmiscellaneous taxes. The study uses the theory of two-way ANOVA as the main approach for exploring the differences. Weassessed the adequacy of our theoretical approach using numerical methods. Revenues generated from the mobilizationinstruments differed significantly with exception of self-employed tax and company tax. Generally, revenue from company,self-employed and miscellaneous taxes were low, compared to Pay As You Earn (PAYE) tax. This study draws attention tothe importance of enhancing the informal sector in order to improve revenue from self-employed tax.
Modelling of Production Relations in the Lithuanian Economy
Authors: Filatovaitė Daina , Bratčikovienė Nomeda
Published: February 2020

This paper presents a method for the analysis of price index changes in each branch of thecountry’s economy given changes in production factors. Cobb–Douglas production functions were evaluated foreach sector separately enabling the forecasting of production quantities. The country’s total production functionwas estimated using conditional regression. Later, an inter-branch balance problem of price and productionvolume relationship evaluation was solved using a Lithuanian input–output table. Finally, combining the estimatedproduction functions and estimated price–output relationship, Lithuanian economy-relevant scenarios ofre-emigration and retail chain Lidl investment were analysed.
Comparisons of Some Weighting Methods for Non-response Adjustment
Authors: Rota Bernardo Jo˜ao , Laitila Thomas
Published: February 2020

Sample and population auxiliary information have been demonstrated to be useful and yield approximately equal resultsin large samples. Several functional forms of weights are suggested in the literature. This paper studies the properties of calibrationestimators when the functional form of response probability is assumed to be known. The focus is on the difference between populationand sample level auxiliary information, the latter being demonstrated to be more appropriate for estimating the coefficients in theresponse probability model. Results also suggest a two-step procedure, using sample information for model coefficient estimation inthe first step and calibration estimation of the study variable total in the second step.
Application of Mixed Linear Models in the Analysis of Road Surface Features
Authors: Židanavičiūtė Jurgita , Vaitkus Audrius
Published: February 2020

The data were collected by researchers at the Road Research Institute, in a study investigating the impact of differentfactors on road surface strength. In this statistical analysis, we apply linear mixed models (LMMs) to clustered longitudinal data, inwhich the units of analysis (points in the road) are nested within clusters (sample of four different road segments), and repeatedmeasures of road strength in these different points are collected over time with unequally spaced time intervals. The data arebalanced – each cluster has the same number of units, which are measured at the same number of time points. Because of correlateddata and different clusters in which data could be correlated, linear regression models are not appropriate here, and therefore linearmixed models are applied.
Statistical Analysis of the Reliability of a Decision Obtained by the TOPSIS Method
Authors: Simanavičienė Rūta , Cibulskaitė Jovita
Published: February 2020

The tasks of making the most appropriate decisions taking into account a number of criteria are dealt with in variousfields such as engineering, industry, finance, economics and others. If the aim is to arrange the alternatives in a priority lineaccording to quantitative attributes, then multiattribute decision-making methods are suitable. Analysts using these methods usuallydo not take into account initial data errors – deviations in attribute values, in which case the decision may be unreliable. In thisarticle, several statistical analysis methods are proposed for the multicriteria decision to measure reliability: formulation of statisticalhypotheses and calculation of confidence intervals for parameters. Based on statistical analysis results, conclusions about thereliability of a multicriteria decision obtained using the TOPSIS method are formulated.
Statistical Analysis of Word Frequency Distribution in Lithuanian Texts of Different Genres
Authors: Bružaitė Neringa , Rekašius Tomas
Published: February 2020

The paper examines Lithuanian texts of different authors and genres. The main points ofinterest – the number of words, the number of different words and word frequencies. Structural type distributionand Zipf’s law are applied for describing the frequency distribution of words in the text. It is obvious that thelexical diversity of any text can be defined by different words that are used in the text, also called vocabulary.It is shown that the information contained in a reduced vocabulary is enough for dividing the texts analyzedin this article into groups by genre and author using a hierarchical clustering method. In this case, distancesbetween clusters are measured using the Jaccard distance measure, and clusters are aggregated using the Wardmethod.
Differences of the Lithuanian Regions Situation in the Labour Market
Authors: Pocius Arūnas , Burneika Donatas
Published: February 2020

The article is based on the results of National science program ‘Welfare society’ project ‘Regional disparities of welfare inLithuania’ (project number GER-005/2017). The project is funded by the Lithuanian Council of Science. The aim of the work is toestimate features of index distribution of labor market and labor resources (working-age people) in the main country regions.Considering the fact about migration changes, a lot of attention in the paper is paid to the estimation of demographic situation impacton the labour market. Apart from the ordinary statistical data, we use results of systemic poverty problem analysis in Lithuania.According to the disposition of information and its opportunities comparison, the data of counties and municipalities were usedduring the research. Different levels of information have helped to detect more detailed differences between labour markets in theregions. The comparison of different sources of information has revealed peculiarities of unemployment change and differentiationthat have not been explored as yet.
Status of Education System: Interactions of Input and Output Composite Indicators
Authors: Stumbrienė Dovilė , Jakaitienė Audronė , Želvys Rimantas
Published: February 2020

Education is one of keystones that guarantees well-being of a country, therefore the understanding about the educationsystem status might be crucial. It motivates to measure the state of the education system, to understand its determinants and tomonitor changes over time that would allow the implementation of evidence-based education policy. Measurement and assessment ofthe state of the education system is a complex task, as the analysis of individual indicators of the educational system is insufficient tomonitor and evaluate education as a multidimensional phenomenon. To achieve a comprehensive and generalized assessment of theeducation system, we have chosen to calculate the composite indicators, namely, indicators of resources and outcomes. Using thelatter indicators we evaluate state of resources and output of the educational system, understand the factors, determining the state, andcompare it over time and in the context of other countries. Indices were calculated for the Baltic countries and three “old” EUmember states: UK representing the Anglo-Saxon liberal model, Germany for the Continental corporatist model and Finland as anexample of the Scandinavian model. For the analysis we used 2002-2014 annual publicly available data from EUROSTAT, OECD,and IEA databases. We have employed a simple weighted additive method with equal weights and principal components analysis forthe construction of indices. We have found that the differences between composite indicators, constructed by the simple weightedadditive method with equal and principal components analysis weights, are limited. The increase in the number of sub-indicators byalmost two-thirds does not affect dynamics of the output indices over time. We have established that inertia of the education systemis different for the countries: the impact of the output on the results is observed with 2–4 year lag for the Baltic States, as there is notime lag or there is a one year lag for Germany and the United Kingdom. Finland's results are different as compared with the othercountries examined. The dynamics of the Baltic indices is similar and possibly constitutes a separate group.
Optimal Designs For the Restricted Maximum Likelihood Estimators in a Random Split-Plot Model
Authors: Nuga Oluwole , Amahia G. N. , Salami Fatai
Published: February 2020

The design effect for the restricted maximum likelihood estimators of variance components in acompletely randomized split-plot model is studied. The model was used to represent the response generated froman experimental scenario where the whole-plot and split-plot factors are random. The work generated groups ofbalanced designs from same number of experimental runs and compared them for optimality using the derived Fisher Information matrix of the restricted maximum likelihood (REML) estimators. The measure for optimalityis the D-optimality criterion; the resulting optimal designs depend on the relative magnitudes of the true values of the variance components. The results show that when the factor variances are larger than the error variances, designs where the absolute difference between the number of whole-plots and the number of levels of the splitplot factor is relatively small show substantial gain in statistical efficiency over other designs.
Maximum Likelihood Estimation in the Fractional Vasicek Model
Authors: Lohvinenko Stanislav , Ralchenko Kostiantyn
Published: February 2020

We consider the fractional Vasicek model of the form dXt = (α-βXt)dt +γdBHt , driven by fractional Brownian motion BH with Hurst parameter H ∈ (1/2,1). We construct the maximum likelihood estimators for unknown parameters α and β, and prove their consistency and asymptotic normality.
Bayesian Estimation of the Parameter of the p-Dimensional Size-Biased Rayleigh Distribution
Authors: Rao Arun Kumar , Pandey Himanshu , Singh Kusum Lata
Published: February 2020

In this paper, we have derived the probability density function of the size-biased p-dimensional Rayleigh distribution and studied its properties. Its suitability as a survival model has been discussed by obtaining its survival and hazard functions. We also discussed Bayesian estimation of the parameter of the size-biased p-dimensional Rayleigh distribution. Bayes estimators have been obtained by taking quasi-prior. The loss functions used are squared error and precautionary.
Case Processing SOP for Thymus v1
Authors: Jorgensen Marda , Nick Jerelyn
Published: February 2020

The purpose of this Standard Operating Procedure (SOP) is to outline the procedures for processing and storing thymus tissue received for HuBMAP consortium assay and analysis.
About the Possibility of the Bulk Thermo Gradient Effect Use for the Creation of the Effective Thermobattery
Authors: Zhakatayev Toksan A.
Published: February 2020

The theoretical basis has been developed and the idea of practical production and testing the semiconductor electric generator (thermobattery) of a new type acting on the basis of a metal – semiconductor system has been offered. It is shown that the thermobattery will work on the basis of the use of a bulk thermogradient effect. Such effect allows to gain a sufficient level of generated power from one unit of the whole volume of a semiconductor material. When using the semiconductor thermobattery together with solar and wind electric generators, it is possible to simplify significantly constructional and technological features of these installations
Nitrogen Oxides Emissions Reduction Methods for Boilers with Air-Cooled Cyclone-Vortex Pre-Furnaces
Authors: Lesnykh Andrei V. , Shtym Konstantin A. , Upskiy Mikhail V.
Published: February 2020

This article is devoted to the features of the formation of nitrogen oxides in boilers with cyclone-vortex pre-furnaces and the possibility of using technological measures to reduce them. According to existing notion, combustion devices with high thermal voltages are characterized by high emission of nitrogen oxides. The influence of the design of the gas inlets into the combustion chamber of the cyclone-vortex pre-furnace on the emission of nitrogen oxides was defined by experimental methods. Additionally, a study was conducted under various modes of operation of the boiler of the furnace process inside the combustion chamber of a cyclone-vortex pre-furnace. It is necessary to point that the optimal nozzle design and water-fuel ratio were selected by means of water injection. Based on these studies, the factors affecting the formation of nitrogen oxides are identified. As a result, the most effective technological methods for low-emission operation of a 116-megawatt boiler with cyclone pre-furnaces were determined
Calculated Study of the Influence of Overheating Aluminum Melt on the Dynamics the Granulation Process
Authors: Skuratov Alexander P. , Ivlev Alexander V. , Pianykh Artem A.
Published: February 2020

A three-dimensional mathematical model of the solidification process of a liquid metal is considered, taking into account the mobility of the boundaries at which the phase transition is carried out (Stefan boundary value problem). The algorithm of calculation is improved, allowing due to the use of the Dirac δ-function in determining the effective heat capacity to take into account the nonlinearity of the equation of unsteady thermal conductivity and the heat of the phase transition. A numerical study of heat transfer during solidification of lead-containing aluminum melt droplets in air and water is carried out. The influence of droplet size and melt overheating on the solidification dynamics of granules has been studied. An approximate ratio based on the square root law is proposed, taking into account the amount of overheating of the liquid phase and linking the thickness of the formed solid phase with the duration of the granulation process
Calculation Features of Trapezoidal Combined Ribbed Slabs on Wooden Frame
Authors: Zhadanov Viktor I. , Inzhutov Ivan S. , Ukrainchenko Dmitrij A.
Published: February 2020

The article describes the features of design and calculation of ribbed slabs on wooden frame with trapezoidal plan, where the cover is included in the general work of the structure on operational loads. The field of possible application of the investigated elements is shown. The features of trapezoidal slab design are described. The main provisions of the proposed method of the considered structures class calculation are reflected. The formula dependencies of trapezoidal slabs calculation on deformations have been determined due to the use of the calculation method of structures that consist of different module materials; the outcomes of previous numerical studies carried out by the authors of the paper as well as the algorithms of a numerical functions determination based on a particular integral method. The location of a weak slab section when calculating on a normal stress has been defined with the regard to a part of an operating cover, which varies along the span length. It is shown that the proposed method allows to assess adequately the stress-deformed state of trapezoidal slabs and to calculate them on strength and rigidity according to the suggested algorithm
Manufacture of wood fiber reinforced polyvinyl acetate rigid foams
Authors: ERGÜN Mehmet Emin , ÖZEN Ertan , YILDIRIM Nadir , DALKILIÇ Berk
Published: February 2020

In this work, rigid foams designed and manufactured using the freezedrying technique were made from polyvinyl acetate (PVAc), bleached kraft pulp and unbleached kraft pulp. The rigid foams designed as an environmentally-friendly product with no pentane or hydrochlorofluorocarbon included in the manufacturing process. The PVAc based foams were reinforced with different kraft pulp contents. Their performance properties such as compressive and flexural strength, physical and morphological properties were investigated according to relevant standards. The foam densities ranged from 0,017 g/cm3 with %17,65 coefficient of variation (CV) to 0,137 g/cm3 with %2,33 CV. The compression resistance was found between 0,001 N/mm2 with %50,00 CV and 0,03 N/mm2 with %5,98 CV. The flexural resistance was found between 0,005 N/mm2 with %20,00 CV and 0,11 N/mm2 with %6,06 CV. Optimum properties were observed B-4 (PVAc/Bleached Kraft pulp 1/0.8). Bleached kraft pulp reinforcement gave better results on performance characteristics of foam materials compared to unbleached kraft pulp reinforcement. Overall test results showed that the PVAc based rigid foams have promising results.
Exploring the ‘Spoiled’ and ‘Celebrated’ Identities of Young and Homeless Drug Users
Authors: Hoolachan Jennifer
Published: February 2020

Young people experiencing homelessness and who use drugs are vulnerable to being attributed with ‘spoiled identities’ due to stigmatising attitudes by wider society. This article is underpinned by a symbolic interactionist account of self-identity and stigma. It draws upon ethnographic research in a UK-based supported accommodation hostel for young people and explores how the residents in the hostel related to the labels of ‘homeless,’ ‘drug user’ and ‘youth’ and how these were expressed through their self-identities. Over a period of seven months, in-depth participant-observation, semi-structured interviews and a focus group were conducted involving 22 hostel residents, aged 16 to 21 years old. The data highlight how the residents engaged in processes of ‘distancing’ or ‘othering’ by making disparaging remarks about other people in similar situations based on stereotyping. These processes reinforced spoiled identities while enabling the residents to disassociate from them. However, residents also appeared to embrace and celebrate certain features of each label, indicating an acceptance of these more positive features as forming a part of their self-identities. The article concludes by arguing for a nuanced approach to understanding stigma and identity among homeless people, one that accounts for more than just a person’s housing situation.
Daniel Kiss (2019): Modeling Post-Socialist Urbanization. The Case of Budapest
Authors: Szabó Balázs
Published: February 2020

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Working Together: Ethnographic Observations on Participatory Design Involving Adults with Autism
Authors: Cascio M. Ariel , Grond Florian , Motta-Ochoa Rossio , Tembeck Tamar , Veen Dan Ten , Blain-Moraes Stefanie
Published: February 2020

Understanding and improving how diverse people work together is a core concern of applied social sciences. This article reports ethnographic observations on a participatory design project in which researchers and adults on the autism spectrum worked together on the design of a new technology—biomusic. Biomusic uses a smartphone application and a wearable sensor to measure physiological signals and translate them into auditory output. Ethnographers were involved in this project, both to facilitate eliciting perspectives of different stakeholders and to observe, record, and reflect on the process. This paper discusses the relationship between ethnography and participatory design in two ways. First, it describes the contribution of ethnography to achieving the goals of participatory design. Second, it draws on ethnographic observations to highlight different strategies people with and without autism used to work together, including strategies put forth by the researchers, strategies already in place in the community, and strategies emerging from the intersection of both. These strategies created a space that was more accessible to many different types of people. Documenting the way that this group worked together challenged several stereotypes about autism and highlighted the role of autistic collaborators as agents.
Protecting Intellectual Property Rights and Traditional Ecological Knowledge: A Critical Look at Peru's Law 27811
Authors: Hepburn Michelle Hak
Published: February 2020

The Peruvian government's Law N. 27811, an intellectual property law passed in 2002 and designed to register and protect traditional knowledge, provides productive opportunities for critical analysis. Framed within the trajectory of international intellectual property rights and discussions that complicate the integration of Traditional Ecological Knowledge (TEK) into Cartesian scientific frameworks, this paper critically examines how the Peruvian law has been implemented and its impacts in Indigenous communities, particularly in the Andean Amazon region. The analysis is based on the author's work assisting Indigenous communities in San Martin register their knowledge through this law. While the law represents an advanced legal attempt to address power inequalities, it remains problematic. It does not address the impoverishment of Indigenous Peoples and continues to subordinate Indigenous TEK to Cartesian science. Although it is a symbolic recognition of the value of Peruvian Indigenous Peoples, other mechanisms are still required to redress the long history of colonization and racism.
Common Fixed Point Results for a Class of (𝜶,𝜷)−Geraghty Contraction Type Mappings in Modular Metric Spaces
Authors: AKTAY Merve
Published: February 2020

Bu makalede 𝛼− Geraghty daraltan tipi dönüşümlerin sınıfından daha zayıf olan (𝛼,𝛽)−uygun çifti aracılığıyla genelleştirilmiş (𝛼,𝛽)− Geraghty daraltan tipi dönüşüm kavramı Modüler metrik uzaylarda tanıtıldı. Bu tarz dönüşümler için bazı sabit nokta ve periyodik nokta sonuçları verildi. Sonuç olarak elde edilen sonuçlar Banach daraltan ilkesinin çeşitli genelleştirmelerini kapsar.