bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of Agricultural Waste Ash as Pozzolana on the Physical Properties and Compressive Strength of Cement Mortar
Authors: Bagcal O. , Baccay M. 
Published: July 2019

Abstract
The increasing demand in cement has inspired researchers in both developed and developing countries around the world to explore and consider alternative materials as partial replacement of cement both in concrete and in mortar. In this study, the influence of agricultural waste, particularly corn cob ash, (CCA) as pozzolanic material or supplementary cementitious material (SCM) on the physical properties and compressive strength of cement mortar was investigated. CCA was used as partial replacement of cement ranging from 0% to 20% by weight at water-cementitious ratio of 0.6 and mix proportion of 1 cementitious: 3 fillers. The physical properties evaluated for the mortar paste were setting time and consistency; and compressive strength of hardened mortar cube. The chemical analysis of CCA was conducted, and results indicated that the CCA used in this study is classified as Class C pozzolana with combined SiO2 + Al2O3 + Fe2O3 of 55.86%. The addition of CCA increases the initial and final setting time. The study also revealed that the addition of CCA in the mortar mix reduces the plasticity or fluidity of the paste. Further, the result indicated that the compressive strength of mortars with CCA decreased as the amount of CCA replacements increased in the mixture. The mortar pastes with varying amount of cement replacements, however, are superior for use as mortar for masonry construction.
System Analysis of Reliability Theory Foundations
Authors: Bazarov S. , Belenkiy Y. , Martynov B. , Soloviev A. 
Published: July 2019

Abstract
The relevance of the problem under study is attributed to the need to enhance reliability of the complex engineering systems used in forestry, agriculture, transport, machine engineering, etc. The purpose of the article is to build a mathematical model that would generalize reliability theory fundamentals from a perspective of the theory of dynamic systems based on the symmetry group concept determined by the probability function – dependence of no-failure (failure) probability on external time for system elements. The new approach to study this problem implies building of a multiplicative group under multiplication between no-failure (failure) probability rates as a number of units of the probability measure per unit of external (physical) time and the rate of functional (internal) time as the amount of external (physical) time per unit of the probability measure. The range of probability measures is [0, 1]; it is counted by the unit of measure defined by a set of elementary events. Based on the combination of functional times determined for each element of the system, the system becomes a single deeply integrated structure bound with external and internal time. Traditional reliability criteria of dynamic systems in the “space – time” functional space are dually related to their analogues in “functional time – probability”. Information credibility of the system dynamic state is enhanced by introducing additional confidence intervals of no-failure (failure) probability in conjugated times and their analysis. This study is intended for engineers, graduates, and students of technical universities.
Thermal Comfort Modeling of a Church Heated with Static Heaters
Authors: Turcanu Florin-Emilian , Ancas Ana Diana , Profire Mihai , Verdes Marina , Balan Marius Costel 
Published: July 2019

Abstract
This paper evaluates a static heating system from a church. They are presented in almost every church. Temperature distribution in the church is done in 2d plane. The simulation is presented on a particular example, the Dormition of the Mother of God Church from Jassy, Romania. The heating system had been simulated in FLUENT and the consequences over the interior climate in the church are showed. An important issue is the impact of this system over the artwork, the church being rise in XVIII century.
Teachers’ Perspective on Wise Education
Authors: Petrinko Edgar 
Published: July 2019

Abstract
The aim of the research was to probe into the teachers’ notion of wisdom and the teachers’ wisdom itself. The study used a phenomenological approach where the experience of teachers was studied by using semi-structured interviews. The interview data were analysed using the qualitative content analysis complemented by some elements of quantification for visualization of a more holistic picture. The phenomenon of wisdom is described on the basis of teachers’ values and experience. According to the teachers, wisdom comprises several aspects and is viewed as a dynamic process. The conclusions reflect the integrity of the phenomenon of wisdom, as well as the importance and prospects of further study of wisdom for its use in the work of teachers.
Trust in the Acquisition of Life Experience of Children Left without Parental Care
Authors: Gorina Maritana , Šukste Ņina 
Published: July 2019

Abstract
The children’s trust determines the relationship between various nuanced emotions and the general attitude towards themselves and the world. Children left without parental care are already subjected to negative experience from childhood, which creates a basic mistrust in people and the world. They have experienced psychological trauma, and often not only one. The authors consider this issue to be topical since children who are left without parental care lose their foundation of trust, and they do not develop productive relationships with their fellow human beings and are unhappy because these children have lost confidence during their life experience. Children who are left without parental care often have to change their living conditions from crisis centres and boarding schools to orphanages and, at best, they are immediately placed in a foster home. These children live in fear because experience shows that they often have to separate from the person they trusted, which has a persistent impact on the child in the process of acquiring a sustainable life experience. Trust builds on the quality of past life experience, relationships with relatives, other adults, friends, foster family, and other stakeholders. Trust is very important. It is very difficult to create deep trust, but very easy to break its fundamental basis. For children who are left without parental care, trust means the belief that the world and people are predominantly good, and the belief that they are good for this world. For the action research, the authors chose a target sample of respondents that interacted with the research, action, and evaluation and comparison of the results obtained in order to find out how the phenomena of trust affected the acquisition of future life experience by children left without parental care.
Textbooks as Resources for Education for Sustainable Development: A Content Analysis
Authors: Mohammadnia Zhila , Moghadam Farzane Deliery 
Published: July 2019

Abstract
If we intend to successfully integrate Education for Sustainable Development (ESD) in the general educational programs, it is important to utilize available methods and resources. This paper argues that English Language Learning textbooks in Iran have the potential to be useful resources and a viable springboard for the implementation of ESD. For this purpose, the present study explores the content of English textbook series developed by Iranian authors through the lenses of ESD. The framework for analysis was based on UNESCO’s Earth Charter and the Roadmap for Implementing the Global Action Program on ESD. The findings reveal that the themes of sustainability are present in these English textbooks to a good extent. However, the results suggest that there must be a more even distribution of such themes throughout the series. Also, the role of the teacher as a facilitator in developing discussions around such themes is highlighted.
Management of hazard of flooding in arid region urban agglomeration using HEC-RAS and GIS software: The case of the Bechar's city
Authors: Bekhira Abdelghani , Habi Mohammed , Morsli Boutkhil 
Published: July 2019

Abstract
During the last few years, the City of Bechar in Algeria has witnessed some extreme events, such as the great flood of the year 2008 in which an exceptional amount of rain was recorded with a flow rate of 830 m3∙s−1 (hwater = 4 m, b = 200 m); similar flooding also occurred in 2012 and 2014. The problem is that most of the City of Bechar has an urban sprawl that extends to the banks of Wadi Bechar, which represents a huge risk for the lives of the inhabitants of the region. The present work aims to assess the flood risk through flood hazard mapping. This method consists in determining the flow rates for the return periods of 25 years (Q25 = 388.6 m3∙s−1, hwater = 3.5 m, b = 200 m, Sspot = 55.35 ha), 50 years (Q50 = 478.3 m3∙s−1, hwater = 5 m, b = 200 m, Sspot = 66.48 ha) and 100 years (Q100 = 567.3 m3∙s−1, hwater = 7 m, b = 200 m, Sspot = 133 ha). For this, it is necessary to adjust the flow rates using Gumbel law along with some computer supports such as HEC-RAS, HEC-GeoRAS and ArcGis for mapping the event. Finally, this work enables us to determine the zones exposed to risk of flooding and to classify them according to the flood water height.
Applying results of the chemical analyses in determining groundwater quality for drinking, agricultural and industrial uses: The case study Rafsanjan plain, Iran
Authors: Jahangir Mohammad Hossein , Soltani Keyvan 
Published: July 2019

Abstract
Based on chemical analyses, the quality of ground waters for drinking, agricultural and industrial purposes was determined in Rafsanjan Plain-Iran. Samples for analyses were taken from 22 wells in 2012. Because of high water hardness and total dissolved solids content, water was found to be unsuitable for drinking purposes. Water quality for agriculture was determined with the use of the Wilcox method. Among the analysed water, 10.33% were attributed to C3-S1 class (high electrolytic conductivity and low sodium adsorption ratio), 59.5% to class C4-S1 (very high EC and low SAR) and 30.17% to class C4-S2 (very high EC and medium SAR). 89.67% of studied wells were unsuitable for agriculture. Because of corrosive water properties all but two wells on Rafsanjan Plain were undesirable for use in the industry. The results of qualitative analyses were presented in GIS and in databases to support making decision and management of groundwater on Rafsanjan Plain.
Interpretation of the results of monitoring of the piezometric measurements of the Chańcza dam in 2014–2017
Authors: Lach Stanisław K. 
Published: July 2019

Abstract
The occurrence of a hydraulic connection between piezometers is identified based on similar changes in water levels. Some piezometers react to changing upper or lower water levels, some may also react to atmospheric precipitation. If the reaction to variable upper water levels is significant, then leakage of seepage control devices is identified and the dam is subjected to repair works. The aim of this research paper is to present and analyse the dynamics of variability of water levels in open piezometers of the Chańcza dam, located at the 36 km of the Czarna Staszowska River in the town of Korytnica in Świętokrzyskie province (Poland). Before the analysis of the piezometric data was commenced, the Grubbs statistical test was used to identify and reject the outliers. The scope of the research includes the data captured between January 14, 2014 and January 13, 2017. A hypothesis was formulated that the change in the trend occurred after the spring of 2015 when the water level in the reservoir was reduced by approx. 1.5 m. Two trend lines were adapted for the water levels of each piezometer using the least squares method – the first one for the period from January 2014 to May 2015, and the second one from June 2015 to January 2017. In this way, two slopes of the linear function were obtained together with an estimation of their errors. These slopes were compared using a statistical parallelism test.
Performance evaluation of solar radiation equations for estimating reference evapotranspiration (ETo) in a humid tropical environment
Authors: Ndulue Emeka , Onyekwelu Ikenna , Ogbu Kingsley Nnaemeka , Ogwo Vintus 
Published: July 2019

Abstract
Solar radiation (Rs) is an essential input for estimating reference crop evapotranspiration, ETo. An accurate estimate of ETo is the first step involved in determining water demand of field crops. The objective of this study was to assess the accuracy of fifteen empirical solar radiations (Rs) models and determine its effects on ETo estimates for three sites in humid tropical environment (Abakaliki, Nsukka, and Awka). Meteorological data from the archives of NASA (from 1983 to 2005) was used to derive empirical constants (calibration) for the different models at each location while data from 2006 to 2015 was used for validation. The results showed an overall improvement when comparing measured Rs with Rs determined using original constants and Rs using the new constants. After calibration, the Swartman–Ogunlade (R2 = 0.97) and Chen 2 models (RMSE = 0.665 MJ∙m−2∙day−1) performed best while Chen 1 (R2 = 0.66) and Bristow–Campbell models (RMSE = 1.58 MJ∙m−2∙day−1) performed least in estimating Rs in Abakaliki. At the Nsukka station, Swartman–Ogunlade (R2 = 0.96) and Adeala models (RMSE = 0.785 MJ∙m−2∙day−1) performed best while Hargreaves–Samani (R2 = 0.64) and Chen 1 models (RMSE = 1.96 MJ∙m−2∙day−1) performed least in estimating Rs. Chen 2 (R2 = 0.98) and Swartman–Ogunlade models (RMSE = 0.43 MJ∙m−2∙day−1) performed best while Hargreaves–Samani (R2 = 0.68) and Chen 1 models (RMSE = 1.64 MJ∙m−2∙day−1) performed least in estimating Rs in Awka. For estimating ETo, Adeala (R2 =0.98) and Swartman–Ogunlade models (RMSE = 0.064 MJ∙m−2∙day−1) performed best at the Awka station and Swartman–Ogunlade (R2 = 0.98) and Chen 2 models (RMSE = 0.43 MJ∙m−2∙day−1) performed best at Abakaliki while Angstrom–Prescott–Page (R2 = 0.96) and El-Sebaii models (RMSE = 0.0908 mm∙day−1) performed best at the Nsukka station.
Implementation of Inclusive Education in Schools Under Local Government Jurisdiction: A Study of South Kalimantan Province in Indonesia
Authors:   Amka
Published: July 2019

Abstract
This paper examines the practice of inclusive education in schools under the jurisdiction of South Kalimantan Province, Indonesia. According to law, the education system must be inclusive; therefore, schools are required to acknowledge all groups of kids, incorporating those with special educational needs (SEN). This study highlights the state of inclusive education in schools, which includes the implementation of its policies by school administrators, proper management by teachers, and the community’s perception. Primary data were obtained from surveys and interviews with 100 school administrators, 500 teachers, 45 parents of SEN students, and numerous stakeholders. The study shows that local government policies have resulted in the development of inclusive education in schools located in South Kalimantan. It also indicates that, most school leaders and parents of non-SEN students support its utilization in classrooms, and are willing to work with SEN students. In practice, the implementation of inclusive education varies from one school to another depending on the perceptions of administrators and the will of teachers.
Emotional Stability among the Ex-detainees Palestinian Children from Israeli Prisons
Authors: Rimawi Omar , Shqair Sameer , Namourah Mohammed , Banat Bassam Yousef Ibrahim 
Published: July 2019

Abstract
The objectives of the study were to identify the emotional stability among the ex-detainees Palestinian children from Israeli prisons. Emotional stability scale was administrated to 299 children using the stratified random sampling method. The findings revealed that the ex-detainees Palestinian children experienced a low level of emotional stability. These results confirmed the traumatic experiences on the personality of the ex-detainees Palestinian children from Israeli prisons. The consequences of the findings for practice are highlighted.
Privatisation of Public Enterprises in Nigeria: Challenges and Prospects on Economic Development
Authors: Nwali Anthony Chukwuma , Johnson Nwokeiwu , Oganezi Bethel 
Published: July 2019

Abstract
Privatisation plays key roles in restructuring economic and social attributes of developing countries. The performance of any economy in terms of growth rate and per capita income have always been based on and associated with active involvement and participation of the private sector. It is apt to note that public enterprises in Nigeria have failed to demonstrate strong desire and ability to promote economic growth perhaps due to ineptitude of the managers and inadequate clear-cut operational guidelines establishing such enterprises. This effort attempts to evaluate the importance and implications of privatisation of government’s companies with respect to economic development. The analytical tool adopted in this paper is descriptive that focussed on review and evaluation of privatisation exercise in Nigeria. Findings indicate that corruption, indiscipline, suspicion, transparency and national sovereignty among others were the major challenges of privatisation in Nigeria. Aligning with the new order of moving poor resource utilization to more innovative and creative initiatives orchestrated the call for privatisation in Nigeria in addition to productivity improvement, increase in revenue, reduction in budget deficits as well as elimination of wastes and improvement of efficiency. The paper concludes by advocating for appropriate reform policies of all inclusiveness and transparency that offer full information about the company slated for privatisation and the attributes of core investors to quell misinformed ideas and suspicion.
Aerodynamic Concept of the UAV in the Gyrodyne Configuration
Authors: Muchowski Jan , Szumski Marek , Krzysiak Andrzej 
Published: July 2019

Abstract
The article presents an aerodynamic concept of UAV in the gyrodyne configuration, as a more efficient one than the currently used UAV airframe configuration applied for monitoring tasks of power lines and railway infrastructure. A sample task which is realised by conceptual gyrodyne based on monitoring aerial power lines was characterised and described. The assumed idea of UAV was shown in comparison to the currently used aircraft configuration presented in the introduction. Referring to momentum theory, hover efficiency of the multicopter and the helicopter was evaluated. In relation to the helicopter, an initial draft of the airframe conception accompanied by a description of advantages of the gyrodyne configuration was exposed. Problems related to the gyrodyne configuration were emphasised in the summary.
Analysis of Methods Used to Eliminate the Propeller Slipstream Effect in Single-Engine Aircraft
Authors: Popowski Stanisław , Dąbrowski Witold 
Published: July 2019

Abstract
Propeller-driven single-engine aircraft are affected by unsymmetrical flow of air around the fuse-lage, and especially around the vertical stabilizer [1-3]. This unsymmetrical, propeller-induced slip-stream produces sideslip [4,5] that needs to be compensated by the pilot using the rudder [6]. In order to relieve the pilot from this additional task, automatic rudder deflection systems are used that compensate for sideslip by trimming the rudder accordingly. Such compensation algorithms are based on flight parameter measurements.
This paper presents more complex systems used to eliminate the phenomenon in question. In addition, it analyzes the existing solutions, based on patents divided into two groups. The first group deals with active slipstream effect compensation solutions, based on aircraft movement parameters that are derived from aircraft performance characteristics defined in advance. The other group comprises solutions that are based directly on feedback containing actual or estimated sideslip angle values. The most advanced systems rely on a combination of the two methods described above.
Bonding of High Temperature Thermoplastic Carbon Composites with Resistance Welding Technique
Authors: Dobrzański Przemysław 
Published: July 2019

Abstract
The article presents ‘state-of-the art’ on joining fibre reinforced thermoplastic composites with the use of resistance welding technique. Their welding process and potential difficulties connected with the process and quality control of a manufactured element are presented. The structure of a typical thermoplastic composite welding stand was also presented. The main welding technology elements were characterized: structure of the resistance element, implementation of the thermal process and pressure application required for joining materials. The paper also presents the required calibration ranges for a technological process with the use of strength test types SLS, DCB, SBS and nondestructive testing of joint with the ultrasonic method.
The Research of Acoustic Emission of a Low-Power Aircraft Engine
Authors: Gęca Michał , Pietrykowski Konrad , Rosiński Karol 
Published: July 2019

Abstract
This paper presents the methodology and investigation of the sound power level produced by a radial piston aircraft engine operating at varied speeds. The research model aircraft engine of a maximum power of 5.5 kW with a two-bladed airscrew was placed on a test bend. Its sound power level was calculated from the sound pressure level measured at 9 measurement points distributed on a hemispherical surface in a confined space in line with PN-EN 3744. Mean sound power generated by the ASP FS400AR engine is 96 dB at idle (2,880 rpm) and 105 dB at a cruising speed (4,740 rpm). Accordingly, it can be concluded that a sound level meter registered a higher sound power level at the points in front of the model aircraft engine than at the points behind it, whereas the lowest sound power level was registered directly above the engine.
Temperature Measurements using Thermal Sensitive Paint
Authors: Jeziorek Łukasz , Widera Patryk 
Published: July 2019

Abstract
Article highlights practical issues concerning temperature measurements using thermal sensitive paint (abbrev. TSP). TSP paint after blue light excitation emits red light with intensity dependent on its temperature. Temperature measurements are preceded with paint calibration, according to exact experiment conditions. Purpose of calibration is to find transfer function between intensity of emitted radiation and surface temperature. To achieve this goal, special computational procedure is implemented. Devices and methodology used for paint calibration are briefly described as well as measuring sample preparation process. Short description is devoted to the procedure for calculation temperature using recorded intensity. Results obtained during calibration are presented. Final conclusions about perspective of using thermal sensitive paint in laboratory are presented, as well as advantages and disadvantages of TSP method versus other methods currently used in temperature measurements.