bluuebunny/crossref_metadata_2025_split huggingface dataset:
Battlefields Tourism: The status of heritage tourism in Dundee, South Africa
Authors: Merwe Clinton David van der 
Published: February 2015

Abstract
Heritage tourism is a significant contemporary facet of tourism in many developing countries. This paper analyses the economic opportunities for battlefield- heritage tourism in South Africa by examining the battlefields route within KwaZulu-Natal. Through structured interviews with stakeholders and structured questionnaires with visitors and local residents, this research explores the understanding of heritage tourism as well as perceptions of its influence on the physical landscape and gauges the importance of this form of tourism as a driver for local economic development in South Africa. Dundee, a small coal-mining town in KwaZulu-Natal, South Africa - where several battlefields are found, is used as a case study. The study demonstrates that several issues need to be addressed if this niche of cultural and heritage tourism is to be a sustainable and responsible form of tourism in South Africa.
Socio-cultural and socio-economic features of second homes in Rosendal, South Africa
Authors: Hay Anette , Visser Gustav 
Published: February 2015

Abstract
Second homes have seen increased research interest over the last decade. On the whole, these investigations have mainly been understood in the spatial context of the developed North. Second homes have only recently been seen as a role player in the changing economic spatialities of small town geographies in South Africa. This growing scholarship on second homes has, however, been less concerned with the social impacts of the phenomenon. The investigation is set against the argument that second homes have social impacts on the immediate and surrounding areas in which they are situated. This investigation also demonstrates that second homes are phenomena with which not only the elite engage but a range of different socio-economic cohorts, including the poor. The social impacts of second homes in this investigation are shown to vary along race and class lines. Against the backdrop that second homes are relevant to very large parts of South African society, the social impacts associated with second homes need to be taken into account in future development planning in South Africa.
Regional development of Saldanha Bay region, South Africa: The role of Saldanha Steel
Authors: Welman Lesley , Ferreira Sanette L.A. 
Published: February 2015

Abstract
Since 1970 the Saldanha Bay region on the West Coast of the Western Cape Province has been high on South Africa’s national development agenda. The region has been struggling for years to meet the preconditions for economic take-off. In this analysis the Saldanha Bay region is positioned in the contexts of global competition among steel-producing countries, South Africa’s national development plan and the Greater Cape Town functional region. The aim is to explain the nature and extent of the relationship between a single secondary industry - ArcelorMittal Saldanha - and the economic development of the larger Saldanha region. Following a brief introduction and background to the Saldanha Bay region, the evolutionary economic geography (EEG) approach and the role of institutions in the development of regions are reviewed. Saldanha Steel (ArcelorMittal), the pioneer industrial firm, is analysed by using a mixed-method approached, where semi-structured interviews and a questionnaire survey are the main research instruments. The contribution of Saldanha Steel to regional development is explored.
Green commercial property development in urban South Africa: emerging trends, emerging geographies
Authors: Rogerson Jayne M. 
Published: February 2015

Abstract
Within sub-Saharan Africa South Africa is one of the leaders in greening and initiatives for sustainable urban development. Notwithstanding the central role of climate change impacts and of the green challenge for the future, the greening of urban development has not been a major focus in local geographical research. The task in this paper is to investigate one aspect of reorienting the economy towards a pathway of low carbon growth and of addressing the green urban challenge. Specifically, issues around the greening of commercial property developments in South Africa are explored. Under the ratings of the Green Building Council of South Africa 50 green buildings existed by early 2014. Geographically these properties cluster in South Africa’s major cities, in particular Johannesburg, the country’s economic powerhouse and centre for corporate headquarters, and Pretoria, the administrative capital. New proposals for building retrofitting may result in a greater spatial spread of green buildings in the near future.
Threats to Transport Systems Catalogue
Authors: Siergiejczyk Mirosław , Dziula Przemysław 
Published: February 2015

Abstract
The article describes basic assumptions and standards of law acts concerning crisis management and critical infrastructure protection, covering one of its more important parts - transport systems. Transport systems' threats codification has been proposed, which, being significant part of crisis management essential phase, is demanded for proper performance of all activities concerned with it.
Vibration Reduction System Using Magnetic Suspension Technology
Authors: Spychała Jarosław , Żokowski Mariusz , Majewski Paweł 
Published: February 2015

Abstract
The article presents considerations concerning the construction of vibration reduction system using magnetic suspension technology. Presents the results of simulation, numerical and experimental the bearingless electric motor, for which successfully used this type of solution. Positive results of research and testing have become the basis for the development of the concept of building this type of active vibration reduction system , at the same time acting as a support for a technical object, which is a jet engine. Bearing failures are manifested by loss or distortion of their mass, which leads to a total destruction of the roller bearing, and thus reflected in the security. The article presents the concept of building active magnetic suspension to eliminate the bearing system of classical rolling bearing and replace it with magnetic bearing.
Reliability, Safety and Exploitation of Technical Objets - Attributes to be out of Order of Modern Civilizations
Authors: Lewitowicz Jerzy , Rutkowski Stefan , Tomaska Ryszard , Żyluk Andrzej 
Published: February 2015

Abstract
Civilization is a state of human society during a particular period of time, conditioned with the degree to which the humans are able to control the nature; the total of already collected material goods, means of production and exploitation, suitable skills (know-how), and social institutions. It is processes of exploitation of engineered objects and natural resources of the Earth that closely and directly relate the economy, safety (widely understood) and environmental protection. Nowadays, as the development of technology has become a hectic process, too little attention is paid to safety. People die. The above outlined considerations can be summarized in the form of the following conclusion: Exploitation is an area that covers the art of many and various activities. It is a philosophy that puts all the fields of knowledge together. Therefore, it should be considered a separate line of science.
Hydrocarbon Biocomponents use in Aviation Fuels - Preliminary Analysis of Issues
Authors: Gawron Bartosz , Kaźmierczak Urszula 
Published: February 2015

Abstract
Article is related to the aspect of the introduction of biofuels to power turbine aircraft engines. The paper presents the current trends in the use of alternative fuels in aviation and the problems connected with the introduction of hydrocarbon biocomponents. It is pointed to the need to take research and implementation works in the field of the subject, also in Poland.
Evaluation Method of Allowable Variance for Results of Tribological Measurement on the Basis of Their the Coherence Trends and Of the Covariance Trends
Authors: Zboiński Marek , Lindstedt Paweł , Deliś Maciej 
Published: February 2015

Abstract
This article discusses the possibility of assessing the technical condition of rolling bearings based on tribological tests of oil samples. The problem is to define diagnostic levels, especially when has a relatively small number of measurements (3, 4, 5 etc.). Rating variance of measurements can be performed using the dimensionless factor covariance ρ(τ) and the dimensionless coherence function y2(a). The set is compact enough when ρ ()) and γ 2(a) will be close enough to oscillate around the value of 1 [1, 3]. In summary, it is concluded that the thresholds S, 2S, 35 are reliable when ρ()) and y2(a) are greater than 0.7 [6].
Thickness Measurement of Thin Oil Layers in Triboelectrical Phenomenon Aspect
Authors: Nowiński Emil , Giemza Bolesław , Domański Marek 
Published: February 2015

Abstract
This paper presents problems of oil film thickness measurements, especially during tribological experiments. There are many methods of oil layer measurement. More of them is used in measurement apparatus. Most popular method to oil film thickness is electric method. Authors indicate that triboelectrical phenomenon disrupts the real value of resistance because of charge particles which change conductance of the oil layer.
Gas-Dynamic Foil Bearings Application in High-Speed Turbines
Authors: Giemza Bolesław , Nowiński Emil , Domański Marek 
Published: February 2015

Abstract
Authors present the general characteristics of the gas-dynamic foil bearings in the paper. The short analysis of the application and possibilities of using gas-dynamic bearings in turbo machinery, especially in the aspect of aviation technology were described. Authors also pointed out possible directions of development and gas-dynamic foil bearings application in high-speed turbines, especially working in high temperature.
Experimental Investigations of a Drifting Cloud of Droplets Dispersed from Aircraft
Authors: Seredyn Tomasz , Rowiński Robert 
Published: February 2015

Abstract
With widespread use of pesticides in modern agriculture, the impacts of spray drift have become a topic of considerable interest. The drifting of sprays is a highly complex process influenced by many factors. The paper presents results of experimental research on a drifting cloud of droplets dispersing from aircraft. Experiments were conducted to quantify spray drift from aerial applications of pesticide. Parallel to the blowing wind, the measurement line 800 m long was disposed. The relationships between the relative dose and the distance of drift as well as spray density and its structure on the measuring length have been established.
Experimental and Numerical Investigation of Radial Forces Acting on Centrifugal Pump Impeller
Authors: Karaskiewicz Krzysztof , Szlaga Marek 
Published: February 2015

Abstract
The paper presents the results of measurements and predictions of radial thrust in centrifugal pump with specific speed ns = 26. In the pump tested, a volute with rectangular cross-section was used. The tests were carried out for several rotational speeds, including speeds above and below the nominal one. Commercial code ANSYS Fluent was used for the calculations. Apart from the predictions of the radial force, the calculations of axial thrust were also conducted, and correlation between thrust and the radial force was found. In the range of the measured rotational speeds, similarity of radial forces was checked.
Finite Element Formulation for the Large-Amplitude Vibrations of FG Beams
Authors: Javid Mehdi , Hemmatnezhad Milad 
Published: February 2015

Abstract
On the basis of Euler-Bernoulli beam theory, the large-amplitude free vibration analysis of functionally graded beams is investigated by means of a finite element formulation. The von Karman type nonlinear strain-displacement relationship is employed where the ends of the beam are constrained to move axially. The material properties are assumed to be graded in the thickness direction according to the power-law and sigmoid distributions. The finite element method is employed to discretize the nonlinear governing equations, which are then solved by the direct numerical integration technique in order to obtain the nonlinear vibration frequencies of functionally graded beams with different boundary conditions. The influences of power-law index, vibration amplitude, beam geometrical parameters and end supports on the free vibration frequencies are studied. The present numerical results compare very well with the results available from the literature where possible.
Experimental Study of the Temperature Distribution and Microstructure of Plunge Stage in Friction Stir Welding Process by the Tool with Triangle Pin
Authors: Bisadi Hossain , Rasaee Sajad , Farahmand Mohammad 
Published: February 2015

Abstract
Considering the developing role of the friction stir welding in manufacturing industry, a complete study on the process is necessary. Studies on each stage of the process in particular, provide a better understanding of friction stir welding, and specially friction stir spot welding. In this study, plunge stage has been studied by experimental methods for investigating the temperature distribution around the tool during the plunge stage and microstructure changes of the workpiece. Experiments were performed on aluminium 7050 plates with coincident measurement of temperature. In the study, the tool which has a triangle pin is used. The results of this study are used as initial conditions for theoretical analysis of welding process. The results show that the temperature distribution around the tool is quite asymmetric. The asymmetric distribution of temperature is due to nonuniform load distribution underneath the tool and tilt angle of it. The temperatures of the points behind the tool are higher compared with points located forward the tool. Microstructural studies showed that four regions with different microstructures are formed around the tool during the process. These areas were separated based on differences in grain size and elongations. Grains near the tool are elongated in a particular direction that show the material flow direction.
A Semi-Analytical Solution of Thick Truncated Cones Using Matched Asymptotic Method and Disk Form Multilayers
Authors: Nejad Mohammad Zamani , Jabbari Mehdi , Ghannad Mehdi 
Published: February 2015

Abstract
In this article, the thick truncated cone shell is divided into disk-layers form with their thickness corresponding to the thickness of the cone. Due to the existence of shear stress in the truncated cone, the equations governing disk layers are obtained based on first shear deformation theory. These equations are in the form of a set of general differential equations. Given that the truncated cone is divided into n disks, n sets of differential equations are obtained. The solution of this set of equations, applying the boundary conditions and continuity conditions between the layers, yields displacements and stresses. The results obtained have been compared with those obtained through the analytical solution and the numerical solution. For the purpose of the analytical solution, use has been made of matched asymptotic method (MAM) and for the numerical solution, the finite element method (FEM).
The Accuracy of the Reproduction of the Lumbar Spine Elements Following CT and MRI Projections
Authors: Kroczak Paweł , Skalski Konstanty , Nowakowski Andrzej , Mróz Adrian 
Published: February 2015

Abstract
The paper presents an analysis of factors influencing the accuracy of reproduction of geometry of the vertebrae and the intervertebral disc of the lumbar motion segment for the purpose of designing of an intervertebral disc endoprosthesis. In order to increase the functionality of the new type of endoprostheses by a better adjustment of their structure to the patient’s anatomical features, specialist software was used allowing the processing of the projections of the diagnosed structures. Recommended minimum values of projection features were determined in order to ensure an effective processing of the scanned structures as well as other factors affecting the quality of the reproduction of 3D model geometries. Also, there were generated 3D models of the L4-L5 section. For the final development of geometric models for disc and vertebrae L4 and L5 there has been used smoothing procedure by cubic free curves with the NURBS technique.
This allows accurate reproduction of the geometry for the purposes of identification of a spatial shape of the surface of the vertebrae and the vertebral disc and use of the model for designing of a new endoprosthesis, as well as conducting strength tests with the use of finite elements method.
Experimental Study and Response Surface Methodology for Investigation of FSP Process
Authors: Weglowski Marek Stanisław 
Published: February 2015

Abstract
The article presents the effect of rotational and travelling speed and down force on the spindle torque acting on the tool in Friction Stir Processing (FSP) process. The response surface methodology (RSM) was applied to find a dependence combining the spindle torque acting on the tool with the rotational speed, travelling speed and the down force. The linear and quadratic models with interaction between parameters were used. A better fitting was achieved for a quadratic model. The studies have shown that the increase in rotational speed causes a decrease in the torque while the increase in travelling speed and down force causes an increase in the torque. The tests were conducted on casting aluminium alloy AlSi9Mg. Metallography examination has revealed that the application of FSP process results in a decrease in the porosity in the modified material and microstructure refining in the stir zone. The segregation of Si and Fe elements was evident in the parent material, while in the friction stir processed area this distribution was significantly uniform.
A Method of the Wear Prognosis of Sliding Bearings
Authors: Miszczak Andrzej , Wierzcholski Krzysztof 
Published: February 2015

Abstract
The considerations presented in this paper include a computer analysis of slide bearing wear prognosis using the solutions of recurrence equations complemented with the experimental data values. On the ground of the results obtained from analytical and computational numerical calculations, and taking into account the experimental parameters of bearing material and operation boundary conditions, the control problems of slide bearing wear surfaces have been presented. The obtained results allow us to see a connection between roughness, material properties, the amplitude of vibrations, the kind of the friction forces, the hardness of materials, the sliding speed in one side and the wear increments in succeeding time units of the exploitation process in other side.
On the Critical Points of Vertical Vibration in a Railway Vehicle
Authors: Dumitriu Mădălina 
Published: February 2015

Abstract
This paper evaluates the level of the vertical vibrations in a railway vehicle carbody generated by the track irregularities and examines the position of the critical point from the comfort perspective. The issue is reviewed on the basis of both a „rigid carbody” model and a „flexible carbody” model, which considers the first two carbody bending modes. The model errors are calculated as a function of the speed behaviour, and the results prove that the comfort performance of a railway vehicle evaluated on the „rigid carbody” model basis are overestimated compared to the ones derived from the implementation of the „flexible carbody” model, mainly at the centre of the carbody. Similarly, a correct estimation of the critical point position in the level of vibrations requires the modelling of the structural vibrations of the vehicle carbody.
Comparative Performance with Different Versions of Low Heat Rejection Combustion Chambers with Crude Rice Bran Oil
Authors: Krishna M.V.S. Murali , Rao N. Durga Prasada , Prasad B. Anjeneya , Murthy P.V.K. 
Published: February 2015

Abstract
It has been found that the vegetable oils are promising substitute, because of their properties are similar to those of diesel fuel and they are renewable and can be easily produced. However, drawbacks associated with crude vegetable oils are high viscosity, low volatility call for low heat rejection combustion chamber, with its significance characteristics of higher operating temperature, maximum heat release, and ability to handle lower calorific value (CV) fuel etc. Experiments were carried out to evaluate the performance of an engine consisting of different low heat rejection (LHR) combustion chambers such as ceramic coated cylinder head-LHR-1, air gap insulated piston with superni (an alloy of nickel) crown and air gap insulated liner with superni insert - LHR-2; and ceramic coated cylinder head, air gap insulated piston and air gap insulated liner - LHR-3 with normal temperature condition of crude rice bran oil (CRBO) with varied injector opening pressure. Performance parameters (brake thermal efficiency, brake specific energy consumption, exhaust gas temperature, coolant load, and volumetric efficiency) and exhaust emissions [smoke levels and oxides of nitrogen [NOx]] were determined at various values of brake mean effective pressure of the engine. Combustion characteristics [peak pressure, time of occurrence of peak pressure, maximum rate of pressure rise] were determined at full load operation of the engine.
Conventional engine (CE) showed compatible performance and LHR combustion chambers showed improved performance at recommended injection timing of 27°bTDC and recommend injector opening pressure of 190 bar with CRBO operation, when compared with CE with pure diesel operation. Peak brake thermal efficiencyincreased relatively by 7%, brake specific energy consumption at full load operation decreased relatively by 3.5%, smoke levels at full load decreased relatively by 11% and NOx levels increased relatively by 58% with LHR-3 combustion chamber with CRBO at an injector opening pressure of 190 bar when compared with pure diesel operation on CE
Postprofessional Cartography in Physical Therapy: Charting a Pathway for Residency and Fellowship Training
Authors: Robertson Eric K. , Tichenor Carol Jo 
Published: February 2015

Remarkably little is known about what constitutes a good residency or fellowship training program. In contrast to entry-level programs, the job of residency and fellowship educators is sometimes more subtle and difficult to articulate. Developing advanced clinical reasoning, communication skills, use of evidence, and patient-management approaches beyond entry-level competencies for students of various levels of education and backgrounds creates unique and diverse teaching challenges. There is no gold standard and precious little evidence to guide us on how best to sequence and pace residency/fellowship curricula, integrate mentoring into didactic and clinical coursework, conduct examinations, and measure the impact of training on patient care. To this end, we'd like to congratulate Drs Rodeghero, Wang, Flynn, Cleland, Wainner, and Whitman on their paper, “The Impact of Physical Therapy Residency or Fellowship Education on Clinical Outcomes for Patients With Musculoskeletal Conditions.” This is a significant first step in the effort to explore that most important challenge of any health profession's educational initiatives: did training result in improved patient outcomes? J Orthop Sports Phys Ther 2015;45(2):57–60. doi:10.2519/jospt.2015.0102