bluuebunny/crossref_metadata_2025_split huggingface dataset:
Роль когнітивних й емоційних схем у стресі
Authors: Sardarzadeh Soorena 
Published: June 2019

Дослідження стосується аналізу ролі когнітивних й емоційних схем у поясненні механізму формування стресу. Він є однією з найбільш поширених психічних і психологічних проблем, які, якщо мають гострий і хронічний характер, можуть призвести до депресії й тривожних розладів, що, зі свого боку, спричинить надмірне використання медичних послуг та втрату функціональності індивідуумів. Виходячи зі схематичного погляду, ми помітили, що психічна травма/шкода, спричинена формуванням і стабілізацією когнітивних та емоційних схем, а також моделлю мислення й звичної поведінки, які є дуже загальними та всеосяжними, визначає тип уразливості. Методологія. Це стаття є дослідженням після події (причинно-порівняльне порівняння). Із цією метою респондентам одночасно надано три анкети: анкету ШДТС, анкету когнітивної схеми та анкету емоційної схеми. Потім суб’єктів із високими показниками стресу, які отримано на підставі анкети, відібрано й розділено на три групи. Отримані дані було проаналізовано. Після розрахунку дескриптивної статистики досліджуваних змінних, дані дослідження розглянуто з використанням статистичних методів багатоваріантного дисперсійного аналізу (MANOVA), ANOVA та методу Тьюкі.
Результати свідчать, що люди з високим рівнем стресу мають схеми провини й некерованості, які можуть бути пов’язані з впливом когнітивних схем індивідів на аналіз та прийняття різних ситуацій у житті. Особи з високим рівнем стресу отримали високі показники в когнітивних схемах безкомпромісних стандартів/ гіперкритичності.
Theory of Constraints in Construction Projects
Authors: Talib Mustafa Hassan , Kashkol Afrah Mohammed Hassan 
Published: June 2019

Construction projects in Iraq are suffering from constraints (financial, technical, political, legal and environmental) that hamper their work. It is therefore necessary to identify these constraints by following the theories in order to accurately identify and provide useful information to make decisions about production constraints and their impact on work. To achieve its objectives or achieve a level of performance for this goal, so it is necessary to use some theories, including theories of constraints that identify those obstacles and find solutions to those obstacles through the schemes of thinking. The concept of constraints is defined as "a comprehensive management philosophy that aims to achieve a continuous achievement of more than one goal in a project." If the project works to achieve a certain achievement in a project after defining the constraints and types and each according to its importance and impact, Which provides a comprehensive framework for the work of projects, as it helps to identify and treat the obstacles experienced by the projects and work to identify appropriate solutions and through a set of logical thinking throughput that begin studying the current reality of the project that suffers from the obstacles and then search for Constraints A number of proposed solutions are then presented. These solutions are examined and the future results of each solution are identified and useful in addressing the specific problem and the extent of the future impact of its application. The methodology used in the research of extracting indicators from the theoretical and practical framework and finding solutions through the curriculum of the thinking throughput will be used to reach a number of conclusions and recommendations aimed at achieving its objectives
Efficiency of Synchronous and Asynchronous Buck-Converter at Low Output Current.
Authors: Khaleel Murad Ismael 
Published: June 2019

In this paper both synchronous and asynchronous buck-converter were designed to work in continuous conduction mode “CCM” and to deliver small load current. Then the two topologies were tested in terms of efficiency at small load current by use of different values of switching frequencies (range from 150 KHz to 1MHz) and three separated values of duty-cycle (0.4, 0.6 and 0.8).
Obtained results turns out that efficiency of both synchronous and asynchronous buck-converter “switching step-down voltage regulator” responds in a negative manner to the increase in the switching frequency. However, this impact is being stronger in synchronous topology because of magnifying effect of losses related to switching frequency compared to those related to conduction when working at small load currents; this behavior makes obtained efficiency of both topologies in convergent levels when they operated to deliver small output current especially when working with higher switching frequencies. Larger duty-cycle can rise up the efficiency of both topologies.
Effect of Evaporative Cooling Combined with Heat Sink on PV Module Performance
Authors: Ahmed Hasan Ibtisam , Saleh kareem Iman , Adil Attar Duha 
Published: June 2019

A pin fins array as a heat sink along with a moist wood wool pad to serve as novel cooling system to cool PV panel has been used. The present cooling system was based on the evaporative cooling concept and extended area of heat transfer. The results gave enhancements in output power and panel’s efficiency about 32.7% and 31.5% respectively. This improvement in the module performance was attributed to the reduction in the operation temperature of the solar cell. The reduction in module temperature was about 26.05%.
Deformation Analysis by Geomatic and Geotechnical Methods in Highway Tunnels
Authors: Erenoğlu R. Cüneyt , Yüceses Okan 
Published: June 2019

In the highway transportation
network, the tunnel has an important place. Tunnels are used to provide safe,
comfortable and economical transportation in areas where topography is not available.
In addition to the facilities provided by the tunnels, there are various risks
during and after the manufacturing phase. These risks need to be anticipated
and manufacturing must be shaped to address these risks. Therefore, deformation
analysis in tunnel projects has an important place. During and after
manufacture, it is necessary to determine and follow the deformations.

In this study, Ayvacık -
Küçükkuyu highway in Çanakkale will be dealt as T1 Tunnel between km 10 + 700 -
12 + 400. Due to the fact that the region is located on the earthquake zone and
because of this reason it has a mixed lithology, it is very important to follow
the deformations. In this context, it is aimed to analyze the relationship and
dimensions of deformation factors in the structure by using geodetic and
geotechnical measurement methods. The relationship between these data and the
load, pressure and tension values observed on horizontal and vertical movements
will be examined during the manufacturing process. Moreover, due to the fact
that the zone is located on the earthquake zone, earthquakes that occur in the
region during the manufacturing process and the manufacturing effects of these
earthquakes will be investigated.

With this study, it is aimed to
give guidance to manufacturing by predicting deformation and external effects
that may occur and arise in engineering constructions. The required revisions
should be made in the fortification systems in line with the predetermined
parameters. In this way, it is aimed to ensure that the manufacturing process
continues in the most economical and safest manner.
Prediction of mechanical properties of Al6061 metal matrix composites reinforced with zircon sand and boron carbide
Authors: Munisamy Balachandar , Madhavan Vijaya Ramnath Bindu , Chinnadurai Elanchezhian , Janardhanan Jeykrishnan 
Published: June 2019

Abstract
In this contribution, the influences of zircon sand and boron carbide on the mechanical properties of aluminum metal matrix composites (MMC) were predicted. Here, metal matrix composite samples were fabricated by stir-casting process. The prepared samples were tested for their tensile, flexural, impact and hardness strength. It was observed that the hardness of the prepared samples increased by adding Zircon sand and boron carbide particles as compared with pure aluminum alloy. Similarly, the impact and flexural strength increased as a result of the presence of the ceramic particles as compared with pure aluminum alloys. But, there was a decrease in the tensile strength due to an increase in hardness and porosity of the composites. It was clearly observed that the impact, flexural and hardness properties of Type III aluminum matrix increased to 3.89 J, 400.3 MPa and 141.7 BHN by increasing the weight percentage of reinforcements. These results have been compared with Al-Zr MMC and Al-B4C MMC and proved that the hybrid composite shows the better results. To study the topography of the samples, scanning electron microscope analysis was carried out. An innovative aspect of this MMC is that, it shows an increase in mechanical properties such as tensile, flexural and impact strength as well as hardness can find practical applications in the aerospace and automobile industries.
Investigation of phase transformations in mill scales for the purification process
Authors: Boontanom Autchariya , Ungtrakul Thitinun , Chirawatkul Prae , Suwanpinij Piyada 
Published: June 2019

Abstract
For the present contribution phase transformations in primary and secondary mill scales discarded from a hot strip mill have been investigated by using synchrotron X-ray absorption spectroscopy and thermal analysis methods. Phase transformations in the scales are influenced by calcination parameters such as temperature, heating rate and isothermal interval. Magnetite, a highly interesting iron oxide for its availability in wide ranges of applications, increases its fraction after calcination at 673 K at a heating rate of 5.38 K × s−1. This is confirmed by both characterization techniques. The calcined primary scale is found almost unchanged due to the existing predominant hematite phase. However, the additional promotion of hematite occurs at a longer isothermal calcination period at 1073 K. The majority of the results corresponded to the literature data and corroborate the assumption for a further purification process of industrial iron oxide by-products.
Tribological behavior of a hydrostatically extruded ultra-fine grained Ti-13Nb-13Zr alloy
Authors: Bulutsuz Aslı Gunay , Yurci Mehmet Emin , Ozaltin Kadir , Chrominski Witold , Lewandowska Malgorzata 
Published: June 2019

Abstract
This contribution summarizes the results an investigation of the wear resistance of as received initial state and nano-structured Ti-13Nb-13Zr alloy obtained by hydrostatic extrusion. The tribological behavior was examined using a ball-on-disc tribometer under unlubricated sliding contact conditions against an Al2O3 ceramic ball. Friction coefficient, material transfer and wear debris of the samples were observed after the wear tests. Wear characteristics of the samples were investigated by means of an optical profilometer, mechanical profilometer and scanning electron microscope for wear debris morphology and wear tracks. Although friction coefficients are very similar according to tribological observations, the domestic distribution of wear characteristics varied for samples of various grain sizes. Morphological observations have shown that surface responses to abrasive ceramic balls involve localized long and short wear debris, fracture, surface plowing causing adhesive wear and the formation of larger surface debris, and material transfer between titanium and the ceramic counterpart.
Mechanical properties, degradation and flue gas analysis of basalt and glass fiber reinforced recycled polypropylene
Authors: Sakthivel Munisamy , Jenarthanan Mukund , Raja Ponnurangam 
Published: June 2019

Abstract
Fiber reinforced recycled polypropylene composites (FRRPC) are developed by reinforcing chopped basalt fiber (BF) and glass fiber (GF) in recycled polypropylene (RPP) using injection molding techniques. The composites are differentiated by varying the fiber volume at 10, 20 and 30 vol.-%. This investigation has been conducted to study the mechanical properties of FRRPC by means of tensile, flexural and impact tests. In addition to that, fracture surfaces have been cut and observed under a scanning electron microscope (SEM). Degradation processes were carried out to assess the amount of oxygen used by the bacteria to stabilize the organic matter under controlled conditions of time and temperature. Flue gas analysis revealings carbon monoxide(CO) and carbon dioxide (CO2), is within the allowable limit. From the above results, it became evident that basalt fiber reinforced polypropylene (BFRP) is superior to glass fiber reinforced polypropylene (GFRP).
Assessment of changes in the water quality along the length of the Siverskyi Donets river at the beginning of the 21st century
Authors: Loboda N. S. , Smalii О. V. , Katynska І. V. , Kotovich О. M. 
Published: June 2019

The relevance of the problem consists in the need to achieve a "good status" of water in the rivers of Ukraine according to the objectives of the Water Framework Directive. The aim of the work is to identify the main trends of water quality changes over time and along the length of Siverskyi Donets River based on data of the hydrochemical observations for the period from 1985 to 2015 inclusive. To establish the water quality we used integral assessments based on hydrochemical indicators such as pollution coefficient, water pollution index, generalized index of water state in accordance with the water quality standards for fishery. The article shows that use of mandatory (priority) chemical indicators in the calculations of the pollution coefficient and the water pollution index does not reflect a real degree of water pollution, since it does not take into account a significant amount of pollutants. It was discovered that major pollutants in the main river include suspended substances, chromium, nitrite nitrogen, phenols, sulfates. For the right-bank tributaries of Siversky Donets (illustrated by the example of the Kryvyi Torets River) originating from Donetsk Upland heavy metals (chromium, copper, zinc) pollution is typical. The degree of pollution based on the coefficient of pollution for average multi-year period is deemed as catastrophic, and based on the index of water pollution it is labelled with IV (contaminated) and V (very contaminated) quality classes indicating a violation of the ecosystem stability. Based on the generalized index, the water is also classified as "contaminated". The calculations based on various integral indicators of water quality revealed that pollution of the Siversky Donets River increases downstream. This is due to growing anthropogenic impact (municipal and industrial waters of large cities, discharge of mine and open pit waters into surface waterways, withdrawal of the runoff for its redirection to canals and water conduits, presence of diffuse sources of pollution by biogenic and organic substances). The beginning of the 21st century saw a trend towards improvement established in the chronological course of integral indicators of water quality which was associated with decrease production volumes. According to the generalized index of water state the water quality of the main river gradually changes from “contaminated” and “very contaminated” to “moderately contaminated”, but contamination by heavy metals, biogenic and organic substances remains high.
Results of adaptation and verification of the coupled numerical models set for predicting the variation of oceanographic features in the North-Western part of the Black Sea
Authors: Kushnir D. V. , Tuchkovenko Yu. S. , Popov Yu. I. 
Published: June 2019

In 2014 Ukraine lost the Ukrainian National Automated System of Marine Forecasting for the Black Sea that was created and operated at the premises of Marine Hydrophysical Institute of the National Academy of Sciences of Ukraine located in the Crimea. Within the framework of research works aimed at establishing a new marine forecasting system a possibility of employing the internationally acclaimed set of coupled numerical models Delft3D-FLOW + SWAN (the Simulating WAves Nearshore) for operational forecasting of the short-term (5 to 10 days) spatio-temporal variability of oceanographic features in the Ukrainian part of the Sea of Azov and the Black Sea Basin is considered. To ensure operation of the models set in the forecasting mode it was suggested to use a prediction of variability of meteorological characteristics at the air-sea interface obtained with the help of the numerical weather forecast model GFS (Global Forecast System). This paper presents the results of verification of Delft3D-FLOW and SWAN numerical models which were adapted to the conditions of the North-Western part of the Black Sea and its Odesa area in the version of meteorological data (fields of wind speed and direction, atmospheric pressure) assimilation from the GFS forecast archive. A technique of telescoping the spatial curvilinear computational grids with different resolution capacity was used in the process of models set adaptation to the conditions of the prognostic area. The models were verified by comparing modelling results with observational data on sea level variability in the ports of Odesa area of the North-Western part of the Black Sea (Chornomorsk, Odesa, Yuzhnyi), as well as with data on wind speed and direction, drift currents and characteristics of wind-induced waves recorded over the studied periods by the gauges of stationary hydrometeorological buoy which was mounted in the Bay of Odessa. Based on the analysis of the results of verification of coupled numerical models Delft3D-FLOW + SWAN set it was concluded that the set of coupled models has good prospects of being used in the system of operational forecasting of the variability of oceanographic parameters of the sea environment in the Ukrainian part of the Sea of Azov and the Black Sea Basin in the version of assimilation of meteorological information obtained from the GFS global forecast model.
The Satellite Account of Expenditures on Environmental Protection: Methodological Aspects of Its Introduction in Ukraine
Authors: Kobylynska Т. V. , Momotiuk L. Ye. , Motuzka О. М. 
Published: June 2019

The article is devoted to methodological aspects addressed in building up the framework for the satellite account of the expenditure on environmental protection in Ukraine. It is argued that any study of the environment need computations and analyses of quantitative indicators based on the statistics data. Problems of statistical accounting are, therefore, the central ones in investigating the expenditure on environmental protection. One of the most urgent tasks is to ensure comparability of data, to enable comparisons of data at all the levels in order to find output key tendencies and patterns in the expenditure on environmental protection, comparisons of figures relating to environmental protection and macroeconomic situation.
The article contains an analysis of the phases of creating the European standard of the system for environmental-economic accounting on the whole and the environmental protection expenditures account in particular. The sources of data for creating the satellite account for the expenditure on environmental protection in Ukraine, and the indicators included in the EU questionnaire designed to collect data on national expenditures on environmental protection are highlighted.
It is demonstrated that data from many sources are used to build the satellite account for the expenditure on environmental protection. It is mentioned that by now Ukraine has not introduced ad hoc surveys of households on the expenditures on environmental protection.
Results of the study show that the main sources of data for computations of the expenditures on environmental protection in Ukraine can be the official statistical observation by type of expenditure, collected by form 1 – environmental expenditure (annual) “Expenditures on environmental protection and environmental payments”, where the expenditure are recorded according to the Classification of Environmental Protection Activities.
The sources of secondary information, i. e. the data from regular official statistical observations and administrative data that are collected with other purposes and reflect selected aspects of expenditure on EP, are recommended for use when developing the methodology.
Estimation the Labor Force Replacement Demand in Ukraine, Caused by Its Outflow Due to the Age and Labor Migration
Authors: Sarioglo V. G. , Ogay М. Yu. 
Published: June 2019

The article describes an effective approach to the anticipation of the labor force demand caused by the need to it replace (the replacement demand). The emphasis is made on estimation the outflow of workforce due to the retirement and labor migration.
The importance of medium-term forecasting (for 10 years) of the labor force demand, caused by the need to replace the workers flowing out of the labor market as a whole and separate occupational or qualification groups in particular is justified in the Ukraine’s context. The data sources and methodological approaches to the anticipation of the replacement demand are highlighted. It is shown that the main source of data for the labor force replacement demand anticipation in Ukraine, like in many other countries, is the state labor force the sample survey. A serious problem for Ukraine is accounting of labor migration effects for the replacement demand, which is assessed by conducting ad hoc surveys. The main methods used in anticipation of the replacement demand are method of trend extrapolation, methods of pseudo-cohorts, and stock-flow modeling. These methods enable for assessing and accounting of not only the processes of outflow of the labor force due to the age, but also transitory processes reflected, inter alia, in changes of qualifications and/or professions by young people at the beginning of their carrier.
A medium-term anticipation of the labor force demand in Ukraine, caused by outflow of the labor force due to the age and labor migration, is performed. It is shown that the replacement demand caused by outflow of the workers due to the age, accounts for a most significant part of the overall demand for workforce, making up in medium-term perspective nearly 13% of the total employment in 2017. The level of the demand has strong variations across occupational and qualification groups: in the occupational group “the simplest occupations”, the average annual demand caused by the outflow due to the age will be nearly 3.4% of the total employment.
It is shown that the replacement demand in Ukraine by occupational group may substantially increase due to labor migration. Thus, the high replacement demand for workers in the simplest occupations is enhanced by the external labor migration of such workers, which share is nearly 42% of the total labor migrants.