bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparative Energy and Exergy Analysis of a Thermal Power Plant With/Without Retrofitted Inlet Air Cooler: A Case Study
Authors: Aliu Sufianu Adeiza , Ochornma Promise Ijeoma 
Published: July 2018

The result of this study shows the performance of Ihovbor Gas Power Plant in Benin, Edo State Nigeria using first and second law of thermodynamics. Analysing the efficiency of the plant using first law of thermodynamics showed that with increase in inlet air temperature, the energy conversion efficiency of the plant reduces. The exergy efficiency of the plant also confirmed that increase in inlet air temperature results in decrease of the exergetic efficiency of the plant. Analysis of each of the components showed the greatest destruction of exergy was in the combustion chamber while the least is the Gas turbine section. Using numerical method in analyzing the gas turbine plant when retrofitting with an evaporative inlet air cooler showed better performance in energy conversion as power generation increased with an average of 1% per 1oC degree fall in temperature, the work ratio and thermal efficiency of the plant also increased. The analysis of the modified plant using second law of thermodynamics showed an increase in magnitude of both the exergy destroyed and the efficiency of the plant. Analysis showed that integrating evaporative cooler as component of the inlet air cooler increases the efficiency of the Air compressor by over 0.8% thus increasing the plant’s exergetic efficiency.
Models of Light and Properties of Light: Design and Assessment of a Simulation and Experimentation Supported Learning Environment
Authors: Voudoukis Nikolaos 
Published: July 2018

The purpose of this study is to propose a way for teaching models of light to upper secondary students. Even if the subject seems to be at the heart of modern physics, it is too difficult to be taught. This triggered us to design and apply a didactical approach, the evaluation of which seems to be beneficial for the instruction of this topic. Our instruction leads to better student’s comprehension of the nature of light than traditional instruction. The didactical approach, which is a proposal for scientific to educational models transformation concerning light, was applied during the school year 2016-2017 to forty seven (47) students – Experimental Group (EG) - of Upper Secondary Education in Athens. As control group (CG), teaching with the classic way, we have fifty (50) other students. In this paper, it is presented the main research. We describe the teaching method and laboratory experiments in this computer supported attempt. Results and some general conclusions from the statistical analysis of pre, post and final tests are also cited.
Silica Ammonium Acetate(SiO2-NH4OAc) Catalyzed Facial Synthesis of Dihydropyrazolo[4',3':5,6]Pyrano[2,3-d]Pyrimidine-5,7-Diones
Authors: Rigi Fatemeh , Shaterian Hamid Reza 
Published: July 2018

Abstract
Silica ammonium acetate (SiO2-NH4OAc) was applied as an inexpensive, practical and heterogeneous catalyst for the preparation of new and known dihydropyrazolo[4',3':5,6]pyrano[2,3-d]pyrimidine-5,7-diones via one-pot four-component reaction of hydrazine hydrate, ethyl acetoacetate aldehydes and barbituric acid/dimethyl barbituric acid under solvent-free conditions. Silica supported ammonium acetate (SiO2-NH4OAc) was prepared according to easy procedure under ambient condition. After completion of the reaction, the catalyst was separated by filtration and reused. So, recycling system, simple work-up, using non-toxic materials, excellent yields and short reaction times makes our research green and convenient for preparation of these classes of organic compounds.
Digital Image Correlation Technique as a Tool for Kinematics Assessment of Structural Components
Authors: Brodecki Adam , Szymczak Tadeusz , Kowalewski Zbigniew 
Published: July 2018

Abstract
The paper reports the results of tests carried out for kinematic properties determination of components under cyclic loading. DIC system called 5M PONTOS was employed to follow variations of displacement versus time. It was conducted by the use of markers stuck on selected sections of components tested. The results are presented in 2D and 3D coordinate systems expressing behaviour of such elements as: mechanical coupling device, boat frame and car engine. These data enabled to capture weak and strong sections of the component examined at various loading conditions.
On 3D Anticrack Problem of Thermoelectroelasticity
Authors: Kaczyński Andrzej 
Published: July 2018

Abstract
A solution is presented for the static problem of thermoelectroelasticity involving a transversely isotropic space with a heat-insulated rigid sheet-like inclusion (anticrack) located in the isotropy plane. It is assumed that far from this defect the body is in a uniform heat flow perpendicular to the inclusion plane. Besides, considered is the case where the electric potential on the anticrack faces is equal to zero. Accurate results are obtained by constructing suitable potential solutions and reducing the thermoelectromechanical problem to its thermomechanical counterpart. The governing boundary integral equation for a planar anticrack of arbitrary shape is obtained in terms of a normal stress discontinuity. As an illustration, a closed-form solution is given and discussed for a circular rigid inclusion.
Electronic Speckle Pattern Interferometry for Vibrational Analysis of Cutting Tools
Authors: Mrozek Piotr , Mrozek Ewa , Werner Andrzej 
Published: July 2018

Abstract
A Michelson interferometer based ESPI system for static and vibration out of plane displacement measurements is presented. The aim of the article is to demonstrate the usability of ESPI non-contact measurement method in the field of machining. The correlation fringe patterns were visualized using custom software. The accuracy of ESPI interferometer was verified by the comparison with measurement results collected using industrial XL-80 laser system. The efficacy in vibration analysis was tested by studying the mode shapes and resonant frequencies of the transverse vibrations of square plates. The measurement methodology was used to determine natural frequencies and the shapes of vibrational modes of NFTe 100x1.2/64-II circular slitting saw. As a result the values of rotational speed that should be avoided during machining were determined.
Investigation of Fracture Process of S355JR Steel in Transition Region Using Metallographic and Fractographic Tests and Numerical Analysis
Authors: Dzioba Ihor , Lipiec Sebastian , Furmanczyk Piotr , Pala Robert 
Published: July 2018

Abstract
In the paper are presented test results of fracture process in brittle-to-ductile transition range for two microstructural types of S355JR steel – ferrite-pearlite and ferrite-carbides. For both kinds of S355JR steel obtained in temperature range of transition region the strength and plastic properties are similar, but the fracture toughness characteristics showed significantly are various. To clarify the differences in the course of trends in the mechanical characteristics performed metallographic and fractographic observations using the scanning electronic microscope. The fractographic examination showed that changes in the fracture surface morphology were dependent on the test temperature. It was also found that during the subcritical crack growth the region of ductile fracture extension reduced with decreasing temperature. The results of finite element method (FEM) calculation the stress fields in front of the crack of single edge notch in bending (SENB) specimens in the range of brittle-to-ductile transition are presented also. The FEM calculations were performed on the numerical model of SENB specimen using the ABAQUS program.
Impacts of ski pistes preparation and ski tourism on vegetation
Authors: Kňazovičová Lýdia , Chasníková Silvia , Novák Ján , Barančok Peter 
Published: July 2018

Abstract
Vegetation of the ski slopes in the Low Tatras National Park in Slovakia was evaluated through the environmental variables and species composition caused by human impact assessment. We compared the grasslands located on pistes, off pistes and on the edge of pistes, and within these we also recorded the grassland management. The results show that the majority of study areas managed by transport of sod clippings has reached the lowest number of species; contrariwise, the grasslands with no management are characterized by the highest number of species. Areas on pistes managed by cutting correlates positively with the bare ground. Cover of mosses positively correlates with the total cover and areas with no management. Total of 17 synanthropic plant species and 2 nonnative species as the indicator of human interventions were noticed. They occurred particularly on the edge areas but also in the surroundings of the off piste areas.
Fast truck-packing of 3D boxes
Authors: Józefowska Joanna , Pawlak Grzegorz , Pesch Erwin , Morze Michał , Kowalski Dawid 
Published: July 2018

Abstract
We present formulation and heuristic solution of a container packing problem observed in a household equipment factory’s sales and logistics department. The main feature of the presented MIP model is combining several types of constraints following from the considered application field. The developed best-fit heuristic is tested on the basis of a computational experiment. The obtained results show that the heuristic is capable of constructing good solutions in a very short time. Moreover, the approach allows easy adjustment to additional loading constraints.
The Level of Arsenic in Water from Mineral Water Spring Gajdovka in Košice and the Associated Health Risks
Authors: Hudák A. , Dudová M. , Hudáková T. , Holub M. , Takáč L. 
Published: July 2018

Abstract
In the recreation area Anička in Košice, there is a mineral spring that inhabitants call Gajdovka. It has been used with several breaks since the 19th century. Mineral water from this spring is specific by the presence of arsenic the concentration of which often exceeds the permitted limit level. This study focused on the analysis of the mineral composition of the spring water. Chemical and microbiological analysis was made in the years 2013—2015. In 2014, the mineral water Gajdovka was regularly monitored throughout the year with respect to the concentrations of arsenic, iron and hydrogen sulphide levels and water levels in the nearby river. The following mean concentrations were determined: total arsenic 0.063 mg.dm−3; iron 0.275 mg.dm−3; hydrogen sulfide 4.608 mg.dm−3. The concentration of iron was below the limit, while the limit for As(III) was exceeded in 2014 for 7 months. The statistical analysis showed that the season affects significantly the level of H2S and Fe and the water levels in the nearby river.
From Cubes to Ribbons: Transformation of an Illusion
Authors: Small Jocelyn Penny , Todorović Dejan 
Published: July 2018

Summary
In Part 1 Small describes her discovery that an array of depicted cubes produces another and completely different illusion from that of a single cube. When a group of such cubes are viewed at an angle, they turn into rectangular boxes, and as the angle gets more severe, they become narrow ribbons. The illusion works only in one direction. In Part 2, Todorović manipulates the image to demonstrate various transformations and offers an explanation of how and why they work the way they do.
Is there a host sex bias in intestinal nematode parasitism of the yellow-necked mouse (Apodemus flavicollis) at Obedska bara pond, Serbia?
Authors: Čabrilo B. , Jovanović V. M. , Čabrilo O. Bjelić , Budinski I. , Blagojević J. , Vujošević M. 
Published: July 2018

Summary
Fifty-one yellow-necked mice from the Obedska bara locality were analysed for the presence of intestinal nematode parasites in order to assert whether there was a host sex bias in infection. Previous research indicated that males would be the more infected sex, either due to the immunosuppressive effect of testosterone or their different allocation of resources towards immune defence. Quantitative infection parameters were compared between host sexes for all nematode species and nematodes in general. In addition, the influence of host sex, age, total body length, body mass and presence of other nematode species on parasite abundance was analysed. No statistically significant differences between males and females were noted for any of the studied quantitative parameters, leading to an absence of sex-biased parasitism in this study.
Respiratory and cardiopulmonary nematode species of foxes and jackals in Serbia
Authors: Čabrilo O. Bjelić , Simin V. , Miljević M. , Čabrilo B. , Mijatović D. , Lalošević D. 
Published: July 2018

Summary
As part of routine monitoring of foxes (Vulpes vulpes) and jackals (Canis aureus) on the territory of Vojvodina province (northern Serbia), an analysis of respiratory and cardiopulmonary parasitic nematodes was conducted. Both host species harbored Eucoleus aerophilus, E. boehmi and Crenosoma vulpis, whereas Angiostrongylus vasorum was found only in foxes. A high prevalence of infection (72.6 %) was noted for E. aerophilus in foxes. The remaining parasite species occurred less frequently in both host species. In all species where it could be quantified, a high degree of parasite aggregation within host individuals was noted. Single species infections were most common, whereas two and three species infections occurred less frequently in both host species. The distribution of abundance of E. aerophilus was affected by host sex, with abundances higher in male foxes. Sampling site and year influenced abundance variation in E. boehmi.
Seasonal variation in helminth parasites of snakeheads Channa punctatus and Channa striatus (Perciformes: Channidae) in Uttar Pradesh, India
Authors: Gautam N. Kumari , Misra P. Kumar , Saxena A. Murari 
Published: July 2018

Summary
Snakehead fishes are widely consumed throughout South East Asia, China and India because of their good taste of meat and high nutrient values such as presence of prostaglandins, thromboxane and Omega-6 fatty acid. Parasitic infection constitutes significant economic loss in fish production. The aim of this work was to study the seasonal variation of helminths in snakeheads. In the presented study, a three-year survey has been performed. A total of 1013 individuals of Channa punctatus and 247 individuals of Channa striatus were examined. A total of 3783 helminths were collected, with an average of 3.02 helminths/fish. 43.50 % individuals of C. punctatus and 59.10 % of C. striatus were found to be infected with acanthocephalans, trematodes, nematodes and cestodes per year. The prevalence and mean abundance of Pallisentis sp. was at its peak in summer. However the prevalence of trematodes, nematodes and cestodes was at peak during autumn. Mean abundance of nematodes was at peak in summer. Interestingly, the males were found more infected as compared to the females and the infection rate in males peaked in summer. In comparison to other weight groups, medium size hosts (21 – 40 g) were found more consistently infected. Thus the results indicate that there are seasonal variations in parasitic helminths infecting C. punctatus and C. striatus which also depend upon sex and weight. These variations may be attributed to various environmental and biological factors including parasite life cycle and immune level of host.
A Rare Cause of Supraventricular Ectopic Beats and Angina in a Young Patient
Authors: Jurcău Monica , Floria Mariana , Mazilu Bogdan , Ouatu Anca , Tanase Daniela Maria 
Published: July 2018

Abstract

Introduction: We present the case of a young man with multiple atherosclerotic risk factors and a rare cause of angina and supraventricular ectopic beats.

Case presentation: A 35-year-old man with one-year history of stable angina pectoris and supraventricular ectopic beats, without any medication, presented to the emergency room complaining of anterior chest pain that occurs at moderate physical exertion. The rest electrocardiogram, transthoracic echocardiography, and chest X-ray were normal; the exertion stress test was also normal, except for supraventricular ectopic beats (trigeminal rhythm). Due to the intermediate pre-test probability of coronary artery disease, he was evaluated using coronary computed tomography angiography. An anomalous origin of the right coronary artery from the left coronary sinus, with an inter-arterial course and without any atheroma plaques, was observed. During hospitalization the evolution was stable, without complications. The patient was further referred to a cardiac surgery clinic to evaluate the possibility of surgical treatment of this anomaly.

Conclusions: Coronary artery anomalies are very rare; however, they present multiple implications in current practice. The most severe complication of this condition is represented by sudden death in young patients due to malignant ventricular arrhythmias. Imaging diagnostic techniques allow for a rapid, noninvasive diagnosis of this rare cause of angina.
Morphological Features and Plaque Composition in Culprit Atheromatous Plaques of Patients with Acute Coronary Syndromes
Authors: Nyulas Tiberiu , Marton Emese , Rus Victoria Ancuta , Rat Nora , Ratiu Mihaela , Benedek Theodora , Benedek Imre 
Published: July 2018

Abstract

Background: The independent role of each plaque feature in relation to plaque vulnerability is still the subject of ongoing research. This study aimed to compare the morphologic characteristics of vulnerable atheromatous coronary plaques with the ones of stable, non-vulnerable plaques, and in plaques with different locations in the coronary tree, in order to identify the most relevant imaging-based biomarkers associated with coronary plaque vulnerability.

Material and methods: This was a prospective observational, non-randomized study that included 50 patients with unstable angina who underwent computed tomography angiography for assessment of the entire coronary artery tree followed by complex morphologic analysis of all lesions, divided into two groups: group 1 – 25 patients with vulnerable plaque (VP) and group 2 – 25 age- and gender-matched patients with non-vulnerable plaque (NVP).

Results: Lesions with a stenosis degree >70% were significantly longer than those with a stenosis degree <70% (8.27 ± 2.74 mm vs. 5.56 ± 4.11 mm, p = 0.04). VP presented significantly higher values of plaque thickness (p = 0.0005), plaque burden (p = 0.0004), and higher total plaque volume (p = 0.0005) than NVP. The remodeling index was not significantly different between the groups (p = 0.6), but the eccentricity index was (0.24 ± 0.14 compared to 0.14 ± 0.17, p = 0.023). Linear regression analysis revealed a significant correlation between plaque burden and plaque components in VP (r = 0.76, p <0.0001 for necrotic core; r = 0.62, p = 0.0008 for fibro-fatty tissue; and r = 0.5, p = 0.01 for fibrotic tissue volume). Culprit plaques located in the right coronary artery presented significantly larger plaque burden volumes (91.17 ± 4.88 mm3 vs. 83.35 ± 8.47 mm3, p = 0.04), larger volumes of necrotic core (82.03 ± 47.85 mm3 vs. 45.84 ± 43.72 mm3, p = 0.02) and fibrofatty tissue (53.23 ± 31.92 mm3 vs. 23.76 ± 20.90 mm3, p = 0.02) than the ones situated in the left coronary artery.

Conclusions: VPs from the culprit lesions exhibit a different phenotype than non-vulnerable ones, and vulnerability features are present in a significantly larger extent in VPs from the right coronary artery as compared to those from the left coronary artery.
How to Measure the Immeasurable Degree to Which an Organization is Sustainable?
Authors: Raza Mazahir 
Published: July 2018

Abstract
Sustainability improvements can be hard to quantify especially where measurements are not available or the outcomes are insubstantial. Sustainability Indicators can play key role in measure of sustainability. The triple bottom line takes into account three criteria for assessing organizational performance; social or people, environmental or planet and economic, or profit. TBL can used to measure the degree to which an organization is being sustainable.
Cross Cultural Knowledge, Ethno-Conservation, and Sustainability Pragmatism
Authors: Oka Nosayaba O. 
Published: July 2018

Abstract
Local conservative knowledge cut across small-scale ecological natural resource management practices, whilst scientific innovations generates extensive solutions using key principles of empirical study. Assessing tribal peoples’ lifestyles, disposition and the preservation of the rich cultural endowments and vegetation fertility, shows linkages of strict enforcement of customary environmentalism to secure livelihood sources. This qualitative study uses descriptive comparison of cross-cultural conservation practices to underscore the reconciliation of cultural knowledge, natural ecology sustainability. Data and case studies from cultural behaviours, perceptions and attitudes of certain tribal groups were processed and presented as strategies and solutions for inclusive propositions. Theories and dataset from previous journals, reports, books and conference communique from multilateral agencies, non-political actors, research institutes were resourceful in arriving at conclusions that will provide a common path that accentuates cultural ecological practices to broaden the campaign for sustainability.
Personality, Job Resources, and Self-Efficacy as Predictors of Volunteer Engagement in Non-Governmental Organizations
Authors: Kossowska Magdalena , Łaguna Mariola 
Published: July 2018

Abstract
As volunteer engagement in non-governmental organizations vary between individuals, it is vital to get to know its predictors. It can be of profit to volunteers and the ones who profit from their activities. The aim of present study was to examine a model explaining volunteer engagement examining volunteer self-efficacy as a mediator and personality traits, job resources (skill variety and autonomy) as its predictors.
Respondents (N = 165) were asked to fill in questionnaires accessible online. Those consisted of demographic questions as well as Ten-item Personality Inventory (TIPI), and three measures adjusted to volunteer environment: Work Design Questionnaire (WDQ), General Self-Efficacy Scale (GSES), and Work Engagement Scale (UWES).
Results. Results of hierarchical regression analyses showed that conscientiousness, skill variety and self-efficacy are statistically significant predictors of volunteer engagement. It was shown that the effects of conscientiousness and skill variety on volunteer engagement are mediated by volunteer self-efficacy.
Forgiveness: love relationship
Authors: Gnudi Beatrice 
Published: July 2018

Abstract
The article highlights the relationship between forgiveness, relation and love. It is divided in three sections: an experience of forgiveness which took place in Burundi in the ‘90s, an outline of the culture of that country and some theories about forgiveness in the psychological field.
The giving of forgiveness is not immediate, but when the victim is able to grant it, he becomes a subject with the power to release himself from a oppressor-oppressed relationship, wherein, if he doesn’t forgive, he might be trapped. Without a victim, there is no offender, even although the guilt and the crime remain as such.
By forgiving, conflict between victim/offender is overcome and the two parts enter into a relationship with each other. In a relationship, every time we connect with the other and we recognize him, we enter into a relationship with him and this recognition becomes a gift.
At this point for-give-ness itself becomes a gift, because it has as it’s centre a gift, it becomes a relationship of love where I am able to recognize the other for what he really is.