bluuebunny/crossref_metadata_2025 huggingface dataset:
Vozes de Crianças Pretas em Pesquisas e na Literatura: esperançar é o verbo
Authors: Araujo Débora Cristina de , Dias Lucimar Rosa
Published: June 2019

Resumo: Neste ensaio propomos evidenciar experiências de crianças pretas em pesquisas acadêmicas e na literatura infantil. Tomando suas vozes como referenciais para a efetiva educação das relações étnico-raciais, discutimos sobre discursos produzidos no ambiente escolar, sendo muitos deles reificadores de estereótipos. Em contraponto, na literatura infantil selecionada, suas vozes acionam novos sentidos acerca de suas trajetórias. Assim, aspectos da formação docente são apontados, com destaque especial à necessidade de uma educação literária que contemple a diversidade étnico-racial. É uma aposta no entrelaçamento de vozes para que possamos esperançar histórias mais cheias de vida às todas as crianças, como projeto de uma educação antirracista.
Crianças da Natureza: vivências, saberes e pertencimento
Authors: Tiriba Léa , Profice Christiana Cabicieri
Published: June 2019

Resumo: Tratamos de vivências de crianças na natureza e de suas repercussões em seu desenvolvimento biopsicossocial. Numa perspectiva espinosana, entendemos que tudo se constitui a partir da natureza, sendo os humanos seres da natureza e, simultaneamente, da cultura. Destacamos as implicações de sua condição biofílica e discutimos desenhos e falas de crianças das etnias Tupinambá de Olivença e Mura e de crianças não indígenas, de Nova Iorque, buscando nos aproximar de seus conhecimentos ecológicos e de seus sentimentos em relação ao universo natural de que são parte. Refletimos sobre essa abordagem na educação escolar indígena e urbana, considerando elementos das diretrizes da educação básica e estudos acerca dos direitos humanos e meio ambiente.
Pouteria (Sapotaceae) na Estação Biológica de Santa Lúcia, ES, Brasil
Authors: Mônico Arnaldo Zanetti , Alves-Araújo Anderson
Published: June 2019

Resumo Sapotaceae (Ericales) é uma família pantropical com 58 gêneros e cerca de 1.250 espécies sendo Pouteria o gênero mais rico com aproximadamente 200 espécies. No Brasil são registradas 124 espécies, das quais 52 são endêmicas. Na Floresta Atlântica são citadas 40, das quais a maioria pode ser encontrada nos estados do Espírito Santo e Bahia. O presente trabalho visa contribuir com um melhor entendimento morfológico sobre as espécies de Pouteria ocorrentes na Estação Biológica de Santa Lúcia (EBSL), Espírito Santo, Brasil. Um total de 13 táxons foram identificados na EBSL: Pouteria bangii, P. bullata, P. caimito, P. cuspidata, P. durlandii, P. gardneri, P. guianensis, P. macahensis, P. macrocarpa, P. psammophila, P. reticulata, P. samborae e P. venosa subsp. amazonica. Descrições, chave de identificação e comentários taxonômicos são apresentados. Os principais caracteres vegetativos úteis à delimitação específica são padrão de venação foliar, presença/ausência de lenticelas, padrão da venação foliar secundária e terciária e indumento. Posição das inflorescências, número de sépalas, lobos da corola, lóculos e sementes são os mais importantes dentre os caracteres reprodutivos para determinação das espécies.
Convolvulaceae no Parque Ecológico Engenheiro Ávidos, Alto Sertão Paraibano, Nordeste do Brasil
Authors: Bandeira Ágda Nara Tavares , Bautista Hortensia Pousada , Buril Maria Teresa , Melo José Iranildo Miranda de
Published: June 2019

Resumo Convolvulaceae inclui cerca de 2.000 espécies distribuídas predominantemente na região tropical. No Brasil, são reconhecidas aproximadamente 400 espécies associadas a todos os domínios fitogeográficos, mas, predominantes na vegetação aberta como o Cerrado e a Caatinga. Este trabalho consiste no estudo florístico-taxonômico de Convolvulaceae no Parque Ecológico Engenheiro Ávidos (PECEA), Unidade de Conservação estadual situada no semiárido paraibano, na Região Nordeste do Brasil. Coletas foram realizadas entre Agosto/2014 e Março/2016 e os espécimes identificados através da literatura especializada. Na área de estudo foram encontradas 20 espécies distribuídas em cinco gêneros: Ipomoea (10 espécies), Jacquemontia (quatro), Evolvulus (três), Distimake (duas) e Cuscuta (uma). São apresentadas descrições morfológicas e uma chave para separação das espécies, bem como dados fenológicos, de distribuição geográfica baseados na literatura e no Herbário Virtual Reflora e dos ambientes preferenciais através de observações em campo das espécies registradas. Três espécies de Ipomoea constituem novos registros para a Paraíba: I. amnicola, I. incarnata e I. ramosissima, e Evolvulus flavus foi recentemente descrita como endêmica do Estado.
One-Day Versus Three-Day Dexamethasone in Combination with Palonosetron for the Prevention of Chemotherapy-Induced Nausea and Vomiting: A Systematic Review and Individual Patient Data-Based Meta-Analysis
Authors: Okada Yuki , Oba Koji , Furukawa Naoto , Kosaka Yoshimasa , Okita Kenji , Yuki Satoshi , Komatsu Yoshito , Celio Luigi , Aapro Matti
Published: June 2019

Background

A dexamethasone-sparing regimen consisting of palonosetron plus 1-day dexamethasone for the prevention of chemotherapy-induced nausea and vomiting (CINV) has been studied previously. Here, we evaluate the noninferiority of the dexamethasone-sparing regimen in overall antiemetic control using a meta-analysis based on individual patient data (IPD).

Materials and Methods

We conducted a systematic review for randomized trials reporting CINV outcomes for the comparison of palonosetron plus 1-day dexamethasone (d1 arm) versus the same regimen followed by dexamethasone on days 2–3 after chemotherapy (d3 arm) in chemotherapy-naïve adult patients undergoing either moderately emetogenic chemotherapy (MEC) or anthracycline plus cyclophosphamide (AC)-containing chemotherapy. PubMed and MEDLINE were searched electronically. A manual search was also conducted. The primary endpoint was complete response (CR; no emesis and no rescue medication) in the overall 5-day study period. The noninferiority margin was set at −8.0% (d1 arm−d3 arm).

Results

Five studies (n = 1,194) were eligible for analysis and all IPD was collected. In the overall study period, the d1 arm showed noninferiority to the d3 arm for CR as well as complete control (pooled risk difference in CR rate − 1.5%, 95% confidence interval [CI] −7.1 to 4.0%, I2 = 0%; in complete control rate − 2.4%, 95% CI −7.7 to 2.9%, I2 = 0%). There was no significant interaction between dexamethasone regimen and risk factors (type of chemotherapy, sex, age, and alcohol consumption).

Conclusion

This IPD meta-analysis indicates that the dexamethasone-sparing regimen is not associated with a significant loss in overall antiemetic control in patients undergoing MEC or AC-containing chemotherapy, irrespective of known risk factors for CINV.

Implications for Practice

Although dexamethasone in combination with other antiemetic agents has been used to prevent chemotherapy-induced nausea and vomiting (CINV), it is of clinical importance to minimize total dose of dexamethasone in patients undergoing multiple cycles of emetogenic chemotherapy. This individual-patient-data meta-analysis from five randomized controlled trials (1,194 patients) demonstrated a noninferiority of the dexamethasone-sparing regimen for complete response and complete control of CINV. The outcomes were comparable across patients with different characteristics. These findings thus help physicians minimize use of the steroid and further reduce the burden of dexamethasone-related side effects in patients undergoing multiple consecutive courses of emetogenic chemotherapy.
Contemplative Teaching and Learning: Opportunities for Asian Studies
Authors: Simmer-Brown Judith
Published: June 2019

Keynote Address, 2018 ASIANetwork Conference Contemplative education is a contemporary movement in higher education that builds upon the epistemological work of cognitive scientists in conversation with contemplative traditions of Asia, integrating critical subjectivity into the classroom. This article traces the development of this movement, identifying key innovators who are from the field of Asian Studies, and outlining the theoretical basis of first-person inquiry in learning. Sample findings of meditation science support the impact of these innovations, showing why contemplative pedagogy is beneficial for students. In addition, the author surveys pedagogies for introducing mindfulness, contemplation, and compassion practices into the curriculum in rudimentary and more complex ways, giving examples of best practices for the undergraduate professor. A bibliography of additional readings and sources is included, for further information.
Akta Pure General Protocol v1
Authors: Kwon Annie
Published: June 2019

A general protocol for running and cleaning the Akta Pure. Always refer to manuals for specific columns before a run for specific details regarding a column's pressure limits, capatability with specific buffers and reagents, equilibration procedures, and cleaning procedures.
Ideological Differences between America and China from Perspectives of Transitivity System —Illustrated by Trump’s and Xi Jinping’s Presidential Inaugural Addresses
Authors: Liao Guohai , Han Gelin
Published: June 2019

Taking Systemic Functional Grammar proposed by M.A.K. Halliday as theoretical framework, this paper is set to quantitatively analyze Donald Trump’s inaugural address and Xi Jinping’s first public speech as president of China in the distribution and functions of six processes from perspectives of transitivity system. Having done this, ideological differences between America and China beneath the textual discourse of their speeches will be qualitatively illustrated. It finds that material, mental and relational processes predominate both speeches and Xi’s speech mainly takes the overall lead in spiritual guidance and inclines to generally control the economic and social development in China. For Trump, he needs to employ all his skill to induce and gain the supports from American people, objectively depicting American mediocre situations by material process, trying to narrow down the psychological distance between his governance and the people by mental process and increasing the belonging of American people by relational process.
EFL Learners’ Behavior States and Academic Outcomes during Playing Games Strategy
Authors: Alghamdy Rashed
Published: June 2019

To identify the impact of playing games on the achievements of EFL learners, a quasi-experimental design study was applied for 4 weeks at an elementary school in Saudi Arabia. This study examines the impact of playing games in enhancing EFL students’ English skills ability in learning English as a foreign language context. In particular, this study purposes to investigate the impact of playing games in comparison to traditional learning in learning English skills on the achievement of EFL learners and their behavioral states during playing games. The participants in this study were 52 male pupils, aged 12-15 years, level six at an elementary government school in Al-Baha City. According to the results from the post-test obtained they highlight statistical variances between the average scores from the EFL learners who were taught English within the learning method of playing games and the control group taught English using traditional learning methods. The variances favored the experimental group nevertheless the findings in the pre-test score suggested there were no statistical variances amid the EFL learners in the first group and those in the other groups in the achievement of English.Furthermore, the observation findings indicate that the EFL learners in the experimental conditions displayed more playing together behavior states and less playing individually on-task behavior states, non-playing together behavior, and off-task behavior than their classmates in the control condition.
Los Sistemas de Creencias en la política de drogas en Colombia 2000-2015. Un análisis desde el Marco de Coaliciones Promotoras
Authors: Acevedo Gómez Daniel , Macías Tolosa Andrés
Published: June 2019

El fracaso de la lucha contra las drogas ilícitas en Colombia en las últimas décadas, el aumento en los índices de consumo y la relativa tendencia de algunos países a legalizar ciertas sustancias, hacen relevante retomar el análisis de las políticas públicas encaminadas a enfrentar ese fenómeno, desde enfoques no tradicionales. En ese sentido, este artículo aborda esa problemática desde el enfoque del Marco de Coaliciones Promotoras y busca determinar los sistemas de creencias que han incidido en el diseño y desarrollo de la política de drogas en Colombia, desde el 2000, momento en que se inició el Plan Colombia, hasta que se completó su tercera fase en 2015. El estudio hace uso de la revisión documental como principal método de análisis, enfocándose en los discursos de las élites de la política pública de drogas en el país.
La solución política del conflicto armado y la reivindicación de la memoria como política cultural de las víctimas de crímenes de Estado: el caso de la Fundación Manuel Cepeda Vargas
Authors: Tafur Villarreal Andrés
Published: June 2019

A través del estudio del caso de la “Fundación Manuel Cepeda Vargas para la Paz, la Justicia Social y la Cultura”, este artículo se interroga por la política cultural de las víctimas de crímenes de Estado en la construcción de paz en Colombia y propone una explicación  ligada directamente a la agencia de la Fundación, acerca de los mecanismos que hicieron posible que los reclamos de las víctimas se instalaran en la agenda pública. El primero tiene que ver con la introducción de nuevos repertorios que hicieron más efectiva la denuncia de los crímenes de Estado y la pedagogía social de la memoria histórica y, el segundo, con la dirección política que le imprimió a la reivindicación de los derechos humanos, para articularla con la solución política del conflicto armado. Se argumenta que la consolidación de estos dos mecanismos hizo posible el posicionamiento de las víctimas de crímenes de Estado en el debate público, y su reconocimiento en el Acuerdo de Víctimas de La Habana.
SPECIAL FEATURES OF GERMAN ADVERTISING TEXTS AND MODERN APPROACHES TO THEIR STUDY
Authors:   Kyiv National Linguistic University, Kyiv, Ukraine, Vasylchuk Lyudmila
Published: June 2019

The article defines the main modern approaches to studying special features in modern German advertising texts.
COMMUNICATIVE AND PRAGMATIC PECULIARITIES OF THE SHORT NON- LITERARY TEXT (BASED ON THE MATERIALS OF SPANISH HOROSCOPES IN INTERNET RESOURCES)
Authors:   Kyiv National Economic University named after Vadym Hetman, Kyiv, Ukraine, Vasylieva Тetiana
Published: June 2019

The article is devoted to the study of horoscope texts posted on Spanish entertainment websites and on digital versions of the leading Spanish newspapers published in print format. Our research focuses on analyzing the features of Spanish horoscopes on different language levels, paying particular attention to their lexical, semantic, morphological and syntactic peculiarities. The relevance of the topic is been determined by the general focus of modern linguistics on studying texts of different genres of discourse, on the complex analysis of their lexical, semantic, structural and functional features from the perspective of anthropomorphism and pragmalinguistics. The analysis made it possible to characterize the horoscope as a kind of short non-literary text of the mass-media discourse. This text is creolized by its form and is informative by its function. Using the example of Spanish horoscope texts it was possible to determine the nature of communicative interaction between the addresser and the addressee and the pragmatic orientation, which is manifested in the author’ choice of verbal and non-verbal means of influencing the recipient. A detailed description of the lexical, semantic, morphological and syntactic features of the Spanish horoscopes and their pragmatic functions is given. The role of non-verbal means, which complement the texts, is been defined. The obtained results show, that the horoscope text has not only communicative and informative, but also persuasive, appealing, expressive and recreational functions and its communicative purpose is to influence the behavior of the addressee.
TRANSLATION QUALITY POLICY IN THE EUROPEAN PARLIAMENT (CASE OF TRANSLATION INTO THE FRENCH LANGUAGE)
Authors:   Kyiv National Linguistic University, Kyiv, Ukraine, Olefir Hanna , Deineko Ivan ,   Kyiv National Linguistic University, Kyiv, Ukraine, Deineko Iryna ,   Kyiv National Linguistic University, Kyiv, Ukraine
Published: June 2019

The article provides overview of the EU citizens’ access to legal and key political documents in their respective state languages. We have described the phenomenon of employing the so-called intermediary “relay” languages in cases when it does not seem possible to provide translation in all 276 possible combinations of language pairs. The article offers analysis of major basic requirements to an interpreter/translator, his or her thematic, professional and linguistic competences, as well as practices of translation/interpretation, which enable the proper quality of parliamentary documents translation. By thematic competences we mean being well versed in politics, economics and finance, law and management, science and technology, the EU institutions and procedures. Linguistic competences imply proficiency in one’s native language, its stylistic aspects, advanced level and complete passive comprehension of at least two other official languages of the EU. Professional competences of a translator imply that he or she can fully comprehend the texts in the source language and stylistically accurately render them in target language, as well as quickly find the necessary terms or facts in both languages, efficiently use machine translation, if necessary. We have identified the logical sequence of translating the texts on parliamentary activities, which are interrelated with one another. The article also dwells on the role of machine translation, translator/interpreter’s memory, source of reference, internal electronic databases in the process of translation. We have cited certain examples of complicated cases and challenges in translation (motivated by gender or historically), as well as text form (punctuation, typography).
ANALYSIS OF MEANS OF IMITATION MODELING USED FOR THE STUDY OF MANAGEMENT PROCESSES IN MEDICAL INSTITUTIONS
Authors: Belov Vladimir , Samarkin Alex , Ivanova Natalya
Published: June 2019

The article considers the common media of event and multiparadigmatic modelling, as applied to the modelling of the processes of medical institutions to serve the public. The possibilities of managing these processes and optimizing the use of available resources are considered. Formulated recommendations on the use of computer environments in the analysis of business processes and processes of care for the population.
POSITIVE RELATIONSHIPS BETWEEN HUMAN IMPACT AND BIODIVERSITY: THE CASE OF THE FIRE-BELLIED TOAD (BOMBINA BOMBINA) IN EUROPE
Authors: Tytar Volodymyr , Nekrasova Oksana , Pupins Mihails
Published: June 2019

Habitat modification affects amphibians indirectly by reducing energy reserves and energy allocated to growth and reproduction, and by affecting population dynamics and viability. Marginal populations of amphibians in Latvia and Ukraine are particularly vulnerable. On the other hand, several studies have shown a positive relationship between human density and biodiversity, indicating that species-rich areas and human enterprises quite often co-occur. Therefore, both positive and negative correlations between human population and species richness may be expected. For a better understanding of what constitutes suitable habitat we used a habitat modeling approach, where modeling can be used for revealing species ecological requirements and relationships between the distribution of species and predictive variables, as well as the importance of each variable in model building. Here we employed maximum entropy (MaxEnt) niche modeling, as a tool to assess potential habitat suitability (HS) for amphibians in Europe, making special emphasis on anthropogenic impact. We used 2474 georeferenced point data (783 - B. bombina occurrence, and to compare results 1691 - L. vulgaris), including results of our field investigations in Latvia and Ukraine. The predictor variables used for modelling the toad species HS suitability were of climate derived from the WorldClim database (19 bioclimatic variables). Human impact was assessed by the Human Footprint (HF), produced through an overlay of a number of global data layers that represent the location of various factors presumed to exert an influence on ecosystems: human population distribution, urban areas, roads, navigable rivers, and various agricultural land uses. Using the Spearman rank correlation, a low, however statistically significant positive correlation (p<0.05), was found between the predicted HS and the HF.
USE OF DRILLING MUDS
Authors: Galitskova Yulia Mikhailovna
Published: June 2019

Drilling of wells is accompanied by pollution of all environmental components with drilling and process waste. With drilling operations carried out, terrain and soil mass disturbance occur first. Waste generated during the drilling process includes drilling muds, return drilling muds, drilling wastewater. The contaminating ability of drilling waste is determined by the use of chemical reagents and components involved in the preparation and processing of drilling muds. The use of additives and reagents is necessary to make sure the solution displays certain properties that ensure effective well drilling. The resulting waste is usually disposed of at landfills or is buried at the site of formation in mud pits, ensuring minimal environmental impact. The use of drill muds in other spheres is hindered by the complex composition of oily waste.The composition of liquid and solid fractions of drilling muds from several deposits were studied in laboratory setting. Waste samples were analyzed for moisture content, organic substances, oil products and other substances. According to the results of the research, measures for improving the properties of drilling muds were developed and proposed. For this purpose, an introduction of high sorption substances to the waste is proposed.The most effective should be the use of a sorbent capable of retaining organic matters and heavy metals. The resulting homogeneous soil-like mixture can be used for land reclamation in the city areas and other settlements, when performing planning works at the initial and final stages of construction, as well as at landscaping residential areas.
FACTORS AFFECTING CHINESE HAMSTER OVARY CELL PROLIFERATION AND VIABILITY
Authors: Rekena Alina , Livkisa Dora , Loca Dagnija
Published: June 2019

Advantageous cultivation procedures for the Chinese hamster ovary (CHO) cells are necessary for the productive commercial production of biopharmaceuticals. A main challenge that needs to be addressed during the process development is the differences in each cell line requirements concerning the nutrients and feed strategies in order to achieve the desired growth characteristics. Therefore, within the current research, a naïve high cell density serum free suspension adapted CHO cell line was tested with glucose and glutamine rich feeds in fed-batch Erlenmeyer shake flask cultures. Glucose consumption rate was adjusted to develop the optimal feed strategies. Obtained results indicated that high glucose and l-glutamine feeding did not improve maximum viable cell density compared to the control samples. During the exponential phase, cell proliferation and viability of all feeds showed no statistically significant difference. Instead, the fed-batch processes tested led to statistically significant differences in viable cell density and cell viability during the decline phase, compared to control (batch) culture. The difference between glucose and glutamine feeding was indistinguishable, most probably due to the concentration imbalance with the rest of the nutrients in feed. The overall study presented a method to slow down the decrease in CHO cell proliferation and viability during the decline phase, instead of increasing the maximum cell density at the plateau phase.
ECONOMIC VALUATION OF ECOSYSTEM SERVICES: A CASE STUDY FOR SUSTAINABLE MANAGEMENT OF DEGRADED PEATLANDS IN LATVIA
Authors: Konstantinova Elina , Brunina Liga , Persevica Aija , Zvaigzne Anda
Published: June 2019

Ecosystem services (ES) are the benefits that people obtain from using ecosystems and can be divided into the following three categories: provisioning, regulating and supporting and cultural services. The strategical importance of ecosystem services is set by the EU Biodiversity Strategy, which put ecosystem services firmly on the EU policy agenda. The aim of the paper is to present and discuss the model for economic (monetary) valuation of ecosystem services for sustainable management of degraded peatlands in Latvia. Based on an economic valuation of ecosystem services (ES), it is possible to compare different territories and different management scenarios. Peatland ecosystems globally represent a major store of soil carbon, a sink for carbon dioxide and a source of atmospheric methane. Climate change may threaten these stocks due to the peat oxidation caused by the draught in areas where the peat extraction has been carried out, as well as the increased risk of forest fires. In Latvia, currently there have not been developed a strategy for the implementation of standard approaches and basic principles for the management of degraded peatlands. There are several options for re-cultivation of degraded peatlands, but for sustainable land use, it is very important to choose the most optimal option from the economic, ecological and society perspective. The research was based on data obtained from a biophysical ES assessment for 28 indicators for 3 scenarios from a 5, 25 and 50-year perspective. The collection of primary data, as well as an aggregation and comparative assessment of secondary data have been carried out by using approbated scientific research methods and ES assessment indicators. The obtained data were adapted to the Latvian socio-economic situation by using correction factors. Depending on ES category, the following assessment methods were used: the market pricing method; the benefit transfer method and the direct market pricing method; the avoided costs method. Economic valuation of peatland re-cultivation scenarios assists land-use planners and policymakers in making ecologically, economically and socio-culturally sustainable land-use decisions, where ecological and economic data are used for a calculated assessment of the land-use options.
IMPORTANCE OF CATERING ENTERPRISES' CLASSIFICATION IN SERVICE QUALITY ASSESSMENT FROM THE CUSTOMER'S POINT OF VIEW. CASE OF REZEKNE CITY.
Authors: Silicka Inese , Litavniece Lienīte , Dembovska Iveta
Published: June 2019

There are a lot of catering companies offering their services on the market, hence, there is a fierce competition between them. It is essential to provide customers with the appropriate level of service they expect from the respective caterer (restaurant, café, bar, etc.). The aim of the paper is to explore the importance of classification of the catering companies in service quality assessment from the customer's point of view in Rezekne city. The paper is developed within the framework of the RTA scientific grant "Quality Assessment of Rezekne City Catering Companies". Within the grant project, an expert questionnaire was developed to carry out quality assessment of Rezekne city catering enterprises. As a result of the research, it was concluded that the customer service in Rezekne city differs depending on the type of the catering establishment. The monographic, logical constructive, and graphic method, as well as the method of observation (expert questionnaires) were used for the research.
STATE OF THE POPULATION DISCLOSURE SYSTEMS IN THE CHANGING RADIATION SITUATION IN BULGARIA
Authors: Dolchinkov Nikolaj Todorov
Published: June 2019

In February and March 2017, I conducted a survey among 3 population groups and 392 participants on the state of the population monitoring and disclosure systems so that the information received was up to date. The resulting and aggregated information should not be considered as a constant because the situation changes dynamically, both in terms of the political situation in the region and the intentions of our neighbours regarding the sites that represent both the radiation risk and the meteorological elements that affect any radioactive contamination. Especially dynamic is the development of meteorological elements, which should be analyzed very thoroughly in the event of a nuclear accident or incident. The results of the study are presented, diagrams and analyzes and guidelines for follow-up are presented.
TRAFFIC FLOW HYPOTHETICAL MODELLING FOR AIR QUALITY IMPROVEMENT AND PLANNING PURPOSES
Authors: Steinberga Iveta , Sustere Liene , Bikse Janis , Bikse Jr Janis , Kleperis Janis
Published: June 2019

The main emphasis of this research was to describe air pollution level and dispersion in a typical street canyon (Valdemara Street in Riga (Latvia) city centre), afterward to postulate potential development scenarios and perform modelling in order to understand the influence on air pollution level. For this purpose special mathematical model was used - Operational Street Pollution Model (OSPM), which was developed by the National Environmental Research Institute in Denmark. Following development scenarios were tested: (1) realistic environmentally friendly - decrease of traffic flow by 50 %, as according to street interviews about 36 - 50 % of drivers are ready to change driving habits from car to bicycle; (2) strictly limited – “green light” for public transport, but restrictions for old private cars, flow speed limitations.
IMPACT OF CLUSTER IONS AND AIR POLLUTION ON HUMAN HEALTH
Authors: Skromulis Andris
Published: June 2019

Maximum permissible concentration of polluting substances in the atmospheric air is defined in the laws and regulations of many countries. The concentration of cluster ions from 400 to 3000 ions per m3 is generally considered to be appropriate for human health. The author of this article analyses potential cases when air enrichment with air ions could enhance air purification and influence favourably human health. The author also describes possible adverse effects when air ionisation can increase the harmful impact on human body, especially in situations when the concentration of polluting substances exceeds the maximum permissible level.
MODELING OF THE FINANCIAL SYSTEM USING THE CONCEPT OF VACUUM POLARIZATION
Authors: Shustov Dmitryi Alexandrovich , Volokobinsky Michail Yuryevich , Pekaskaya Olga Anatolyevna
Published: June 2019

The possibility of using the theory of deterministic chaos is considered. Vacuum polarization is a fundamental type of physical processes. The average value of any physical quantity must remain zero. Taking this assumption as a fundamental law, we propose a model that describes the processes of variation (depreciation) of the value of money. At the same time, we consider the processes of variation of the initial amount of funds introduced into the economic system by an independent “generator” (for example, the US Federal Reserve System) in a situation when the amount of returned funds must exceed the amount of given credits. Since the amount of returned funds must exceed the amount borrowed by the value of the refinancing rate, either a constantly increasing debt is formed, or an increase in the money introduced to the economy. The relationship of the “depreciation” of money is also investigated in this model
INPUT DATA COLLECTION FOR THE FIT-GAP ANALYSIS METHOD: A LITERATURE REVIEW
Authors: Ancveire Ieva
Published: June 2019

Development of Enterprise Resource Planning (ERP) systems has become an independent industry for the improvement of information systems. It can be stated that ERP systems are designed to support the operation of a company. The fundamental objective of the system is to create a business value that aims at reducing the time and costs of the business while increasing the profit of the company. Although the adaptation and deployment of the ERP system, in general, are complex and protracted processes that require a lot of resources, the obtained results sometimes differ from the expected results of users. Mostly for that reason, there are incomplete internal enterprise business processes and software requirements analysis and development. Therefore, there is a need to determine the compliance of the main enterprise requirements and business processes with the ERP system. To choose the most appropriate ERP system, it is necessary to identify all possible methods of input data for the fit-gap analysis method. Thus, the main aim of the present study is to identify possible input data for the fit-gap analysis method, which can be used for the selection of the most appropriate ERP system.
ANALYSIS OF RESEARCH TRENDS IN AGRICULTURAL ENGINEERING
Authors: Francik Sławomir , Knapczyk Adrian , Frączek Jarosław , Ślipek Zbigniew
Published: June 2019

Nowadays it is necessary to define actual global research trends in disciplines in order to determine the major research topics, discoveries and global scientific networks. The goal of the work was to determine the main topics and research trends in agricultural engineering. For this caser he method of modified bibliometric analysis was applied. Such analysis of the keywords frequency occurrence and the links between the keywords in Biosystems Engineering Journal shows that in the three analysed periods, certain keywords invariably remain dominant. These are “model”, “system” or “systems”, “temperature” and “water”. The highest number of publications was qualified for the CIGR section: Information Technology. It can be, therefore, stated that in the recent period the most intensively developing researches were dedicated to the application of IT tools in creation various types of models, allowing to simulate and optimize agricultural processes. A majority of publications covered decision-making support (Decision Support Systems), image analysis application, and automation of agricultural processes.
ANALYSIS OF RESEARCH TRENDS IN THE FIELD OF MECHANICAL ENGINEERING
Authors: Knapczyk Adrian , Francik Sławomir
Published: June 2019

The work includes a bibliometric analysis of the main topics and research trends within the discipline of Mechanical Engineering. On the basis of analysis of data from the Scopus database, the Applied Mechanics Reviews magazine was chosen, which is the only one conducting scientific activity exclusively in the field of Mechanical Engineering. In the years of analysis (2002-2017), it was pointed out that the main research topics are optimization issues, material engineering and mechanics.
EFFECT OF CARBON NANOTUBES ON THE ELECTRICAL PROPERTIES OF THE POLYMERIC COMPOSITES
Authors: Gango Sergey , Gusev Konstantin , Ilin Evgeniy , Predtechensky Mikhail , Solovyev Vladimir , Trifonov Sergey
Published: June 2019

Experimental study of single-wall carbon nabotubes (CNT) effect on the electrical properties of polymeric composite materials based on epoxy matrix has been carried out. Direct-current (DC) as well as alternating-current (AC) electrical conductivity of nanocomposites with different CNT concentrations have been investigated in the temperature interval from 293 K to 373 K. Measurements of Seebeck coefficient confirm n-type conductivity of composite with CNTs. Percolation threshold of the composite material under study has been estimated. It has been found that addition of single-wall CNT at low concentration causes hysteresis of current-voltage characteristics and the temperature dependences of electrical conductivity as well as its anisotropy in the samples under study. No noticeable frequency dependence of the AC electrical conductivity has been found in the frequency range from 100 Hz to 300 kHz.
POWER MODEL OF IMPULSE ARC DISCHARGE GENERATION IN ACTIVE MEDIA OPTICAL PUMPING XENON LAMPS OF SOLID-STATE LASERS
Authors: Mandryko Yuri Anatolievitch , Chirtsov Alexander Sergeevitch , Mikushev Vladimir Mikhailovich
Published: June 2019

The semi-empirical model of arc impulse discharge development in impulse xenon lamps for optical pumping of solid-state lasers' active media was considered. Equations of the power balance of supplied electrical power and processes of ionization, plasma heating, heat dissipation and optical radiation generation laid the model's basis. The analytical description of the processes being considered results in an ordinary differential equation which allows a non-resource-intensive numerical solution. The built model enables to evaluate basic electrical and optical parameters of non-local arc discharge plasma at its development stage. Comparison with the results of measurements of electrical and optical plasma parameters which are the most convenient for experimental diagnostics in the modelled non-stationary mode testifies to adequacy of the developed model. Relative simplicity and convenience of the model predetermines its possible usage when solving applied engineering tasks of optimization of operating parameters of impulse pumping lamps and for obtaining initial (zero) approximations for comprehensive modelling of a non-local non-stationary gas discharge plasma in science-intensive calculations taking into account a great combination of elementary collision and radiation processes in a non-equilibrium system.
COMPARISON OF THE LONG-TERM PROPERTIES IN COMPRESSION OF DIFFERENT SIZE FOAMED CONCRETE
Authors: Gailītis Rihards , Sprince Andina , Pakrastins Leonids , Shakhmenko Genadijs , Kozlovskis Tomass
Published: June 2019

Foamed concrete has been used as a building material since the early 1920s. In the beginning, it was used as an insulation material with very low density. Since then there have been attempts to make this material more load-bearing and structural. In the present-day foamed concrete is being used in soil reinforcement, manufacturing of building blocks and other sorts of construction materials. [1] The aim of this article is to determine long-term properties and strength of foamed concrete specimens as well as compare the results between two differently sized foamed concrete specimens. The size of creep and shrinkage specimens were Ø46x190 mm and Ø75x180 mm. The creep properties of the specimens were determined by loading them with 20% of the ultimate stress value. [2] The compressive strength, creep and specific creep of specimens were determined as well as specimen size factor to creep deformations.
GRINDING WHEEL MONITORING SYSTEM
Authors: Nikiforov Igor , Maltsev Pavel , Kulakova Marina
Published: June 2019

It has been hypothesized that the change in the micro and macro geometry of the grinding wheel can be determined by a non-contact way by supplying jet of air through the nozzle of a pneumatic-electric-contact converter to the surface of the tool during operation. To confirm this hypothesis an experiment was did on a surface grinding machine. Various samples were machined, that led to self-sharpening of the tool. Grinding wheel monitoring system was developed for the experiments. System includes a device that provides the setting of the necessary working gap between the nozzle and the controlled wheel. A justification is proposed for determining the frequency of grinding wheel grinding during operation by accurately accounting for changes in the state of its surface without stopping the machining process.
ON A 3D INITIAL-BOUNDARY VALUE PROBLEM FOR DETERMINING THE DYNAMICS OF IMPURITIES CONCENTRATION IN A HORIZONTAL LAYERED FINE-PORE MEDIUM
Authors: Guseynov Sharif E. , Aleksejevs Ruslans , Aleksejeva Jekaterina V.
Published: June 2019

In the present paper, we propose an analytical approach for solving the 3D unsteady-state boundary-value problem for the second-order parabolic equation with the second and third types boundary conditions in two-layer rectangular parallelepipedic domain.
TRIBOLOGICAL PROPERTIES AND MICROSTRUCTURE OF ELECTROLESS NICKEL COATINGS REINFORCED WITH NANOPARTICLES
Authors: Kaleicheva Julieta , Karaguiozova Zdravka , Mishev Valentin
Published: June 2019

Composite nickel coatings composed of Ni; Ni + TiN are studied. The method for elecrtroless nickel deposition EFFTOM-NICKEL with TiN nanosized strengthening particles (50nm) is applied. The coatings are deposited on austempered ductile iron (ADI) samples. The composition of cast iron samples is: Fe-3,63C-2,59Si-0,30Mn-0,010S-0,034P-0,53Cu wt. %. The samples are put under isothermal hardening at 900oС for an hour and isothermal retention at 290 oС for 2 hours with the aim to receive a lower bainite structure. The wear resistance experimental testing is carried out using Taber-Abraser test machine by disk to disk classical method. The microstructure observations of the coatings and padding are performed using an optical microscope GX41 OLIMPUS also the coatings’ microhardness by Knoop Method is examined. The wear resistance, microstructure, thickness and microhardness of the as plated and thermally processed at 290oС for 6 hours coatings are defined.
STUDY OF CUTTING AND LABELING OF POLYMETHYLMETHACRYLATE USING A CO2 LASER
Authors: Dolchinkov Nikolay Todorov , Lazov Lyubomir , Ivanov Jordan Shterev , Nedyalkov Deyan Dimitrov , Linkov Lyubomir Ivanov
Published: June 2019

Progress in direct laser marking when processing plastics with unmatched quality of markings, contrast and speed. This article presents the latest generation of laser materials and laser equipment systems. When properly applied, laser marking can provide quality for production and add value to the appearance and function of the product.Describe the parameters influencing the depth of the laser marking of polymethylmethacrylate (PMMA) products. Experimental results are presented for determining the quality of cuts on the polymer surface at specific parameters - power and speed.
Segregación de la población de origen extranjero en una ciudad media del noroeste peninsular. El caso de A Coruña / Segregation of Foreign Population in a Medium Size City in the Norwest of Spain. The case of A Coruña
Authors: Pérez-Sindín López Xaquín S.
Published: June 2019

Este trabajo de investigación tiene por objetivo cuantificar y valorar el grado de segregación de la población extranjera en un ámbito geográfico poco estudiado en la literatura sobre el tema, como es el de las ciudades medias del noroeste peninsular. En concreto, se analiza la distribución residencial de la población extranjera en la ciudad de A Coruña entre los años 2005 y 2017. Los bajos índices de segregación confirman unas pautas de inserción de flujos migratorios semejantes a las de otras ciudades españolas y del sur de Europa. No obstante, lasituación es dispar según la nacionalidad, hecho que indica diversas pautas de asentamiento, pudiendose hablar de una segregación residencial de tipo estructural en el caso de la población de nacionalidad senegalesa, así como de la configuración del Agra del Orzán como enclave étnico inexistente antes del boom migratorio en España y cuyas característicaslo acercan al concepto de barrio étnico descrito en la literatura.Cette recherche vise à quantifier et évaluer le degré de ségrégation de la population étrangère dans une zone géographique peu étudiée dans la littérature sur le sujet, comme c’est le cas des villes du nordouest péninsulaire. Plus précisément, on analyse la distribution résidentiellede la population étrangère à La Corogne entre 2005 et 2017.Les faibles taux de ségrégation confirment des modèles d’insertion de flux migratoires similaires à ceux d’autres villes espagnoles et du sud de l’Europe. Cependant, la situation varie selon les nationalités ; ce qui indique des schémas de peuplement différents, pouvant souligner une ségrégation résidentielle de type structurel dans le cas de la populationde nationalité sénégalaise, ainsi que la configuration d’Agra del Orzán en tant qu’enclave ethnique (inexistante avant le boom migratoire en Espagne) dont les caractéristiques la rapprochent du concept de voisinage ethnique décrit dans la littérature.This research aims at studying and characterize the residential patterns of the foreign population in one of the least studied geographical areas in Spain, as it is the Northwest region. Particularly, it is analysed the residential distribution in the city of A Coruña between 2005 and 2017. The low segregation rates confirm the patterns of insertion observed in other Spanish and southern European cities. Yet, differences across nationalities are significant and it is possible to speak of a structural segregation in the case of Senegalese population, as well as the configuration of Agra del Orzán as a new ethnic enclave, which main features bring it closer to the concept known in the literature as ethnic neighbourhood.
Algorithm of hearing monitoring of children with congenital heart disease
Authors: Garbaruk Ekaterina S. , Nnomzoo Alice A. , Pavlov Pavel V. , Gorkina Oksana C.
Published: June 2019

Congenital heart disease (CHD) is one of the most common types of birth defect. Often newborn hearing screening is not performed for infants with congenital heart disease because of serious health problems at birth. Hearing loss in children with CHD may have late onset due to different stages of CHD treatment. The monitoring of the auditory function is required for early identification of hearing loss in children with CHD, however algorithm of follow-up assessment is not currently defined.

Objective – estimation of prevalence, types and time of hearing loss onset in children with congenital heart disease and development a follow-up assessment for CHD children.

Results. 148 children with congenital heart disease have been evaluated with auditory brainstem response testing, otoacoustic emissions, impedancemetry, behavioral hearing tests. The patients ranged in age from 7 days to 6 years. 55 children had hearing loss: 28 children with conductive hearing loss and 27 children with sensorineural hearing loss, 2 of them with auditory neuropathy. 6 children had late onset sensorineural hearing loss. The age of delayed hearing loss identification ranged from 4 months to 5 years.

Conclusion. Children with CHD require long-term monitoring of the auditory function; an algorithm of follow-up assessment for children with congenital heart disease is proposed. Audiological assessment in children with CHD should include auditory brainstem response registration for auditory neuropathy identification.