The train wheel is one of the elements most exposed to static and dynamic loads during the transport. For this reason, it is of great importance for the safety of rail transportation that the wheel-axle assembly is carried out securely through the shrink-fit method. The surface roughness of the inner diameter of the wheel must be within 0.8–3.2 μm in order to provide the optimum shrink-fit. In this

Sliding tribocorrosion behaviours of AISI 316 stainless steel were investigated against alumina ball in natural seawater environment (SWE) under 5 N loads. OCP (open circuit potential), potentiostatic (−1 V and 0.3 V) and potentiodynamic measurements were enforced to understand the influence of the sliding wear and electrochemical potential on tribocorrosion behaviours of AISI 316 stainless steel in

In this paper, the free vibration characteristics of functionally graded double-beam system (FGDBS) elastically connected by an elastic layer with uniform elastic stiffness under arbitrary boundary conditions are investigated. It is assumption that the material distribution properties of the individual beams of FGDBS depends on different four-parameters. Timoshenko beam theory in which the effects

Nowadays, the softwarization and virtualization of resources and services rapidly continue, and along with reading and writing, programming is going to be one of the basic human ability. Thus, the detection of skilled programmers at an early age has become important for economies to strengthen their workforce and compete globally. The current technological momentum shows that when the middle school

The purpose of this study is to experimentally investigate thermal performance of Two Phase Closed Thermosyphon (TPCT) using nanofluid containing CuO nanoparticles at a mass concentration of 1% and 2% wt. For this purpose, an experimental setup was designed and manufactured which contains a copper pipe, 100 cm in length and 18 mm in the inner diameter. TPCT consists of three sections: the evaporator

A monitoring mechanism is vital for detecting malicious attacks against cyber systems. Detecting denial of service (DOS) and distributed DOS (DDOS) is one of the most important security challenges facing network technologies. This paper introduces a reliable detection mechanism based on the continuous ranked probability score (CRPS) statistical metric and exponentially smoothing (ES) scheme for enabling

Contamination of electroencephalogram (EEG) signals due to natural blinking electrooculogram (EOG) signals is often removed to enhance the quality of EEG signals. This paper discusses the possibility of using solely involuntary blinking signals for human authentication. The EEG data of 46 subjects were recorded while the subject was looking at a sequence of different pictures. During the experiment

Artificial Neural Networks are commonly used to solve problems in many areas, such as classification, pattern recognition, and image processing. The most challenging and critical phase of an Artificial Neural Networks is related with its training process. The main challenge in the training process is finding optimal network parameters (i.e. weight and biase). For this purpose, numerous heuristic algorithms

Almost all cellular mobile communications of today take place in sub 3 GHz band that has now become too crowded to support future demands of increasing mobile data traffic. Therefore a new paradigm has been explored for designing next generation cellular communication system (i.e. 5G) using 28 GHz and 39 GHz millimeter wave (mmW) frequency bands. In 2016 Federal Communications Commission (FCC) allocated

The rapid growth in the usage of location-based services has resulted in extensive research on users’ trajectory data publishing. But, a key concern here is a potential breach of user privacy through various linkage attacks by an efficient adversary. There exist a few privacy preservation methods to defend against either single or combination of linkage attacks, namely Identity linkage attack, Attribute

The resistance of a material to cavitation erosion is assessed by measuring specimen weight change induced by the application of a high-power vibration horn close its surface. This paper describes a proof-of-concept study of a measurement technique for assessing the progression of cavitation erosion for commonly used engineering materials. UK National Physical Laboratory Cavitation Sensor enabled the

In this study, retarded injection timing was investigated to overcome higher NOx emissions of a direct injection diesel engine fueled with diesel fuel (90%)/canola biodiesel (10%) blend. The experiments were performed at the maximum torque speed (2200 rpm) under four loads (3.75 Nm, 7.5 Nm, 11.25 Nm and 15 Nm) and three injection timings (original −28 °CA, 26 °CA and 24 °CA bTDC). The effects of the

Most literature works carrying out capacitor remaining useful life (RUL) prognosis in a three-phase inverter fed Adjustable Speed Drive (ASD) system focus on analyzing the effect of different environmental and operating conditions. But it is the effect of inverter design parameters on capacitor RUL that is of greater interest to the inverter topology designers. This paper performs a parametric investigation

A full-swing high-speed hybrid Full Adder (FA) cell based on Gate Diffusion Input (GDI) technique and Conventional Complementary Metal-Oxide Semiconductor (CCMOS) logic has been proposed in this work. The design has been verified and compared with ten existing state-of-the-art FAs to validate its performance. Simulations were conducted using Cadence Computer Aided Design (CAD) tool in 45 nm CMOS process

A novel ultra wideband (UWB) printed monopole multiple-input multiple-output (MIMO) antenna with non-uniform transmission line using nonlinear model predictive control (NMPC) is presented. The proposed antenna is superior to conventional antennas in terms of dimensions, gain, and efficiency while maintaining the impedance bandwidth. In order to improve the results, a non-uniform transmission line has

This work presents a methodology to fabricate zeolite coating on aluminum and magnesium alloys. A procedure for coating AA 6082 aluminum and AZ31B magnesium alloys substrates with a homogeneous, adherent and anticorrosive layer of a zeolite filler embedded in a silane matrix is developed. The adhesion of the coating has been probed by scratch and shear tests. Furthermore, the coating strength at high

In wireless heterogeneous networks (HetNets), the spatial densification through small cells and the application of massive MIMO antenna arrays are key enablers for high data throughput, wider coverage, and improved energy efficiency (EE). However, ultra-dense deployment of small cells is envisioned to exacerbate network management and increase energy consumption in HetNets. To this end, this paper

The fact that the properties of thermoelectric materials are to be estimated with Artificial Neural Networks without production and measurement will help researchers in terms of time and cost. For this purpose, figure of merit, which is the performance value of thermoelectric materials, is estimated by Artificial Neural Networks without an experimental study. P-and n-type thermoelectric bulk samples

The gas tungsten arc weldability of micro-alloyed hot-rolled ferritic XPF800 steel, which is newly produced by Tata Steel, has been studied. The weld geometry profile, mechanical properties and microstructure affected by heat input have been investigated. The micro examination of the welded joint has been characterized utilizing optical microscope and scanning electron microscope. Atomic concentrations

The problem of parameters uncertainty of the controlled system is one of the most challenges faces controller designers. This work proposes a combination between the Particle Swarm Optimization (PSO) method and Kharitonov's theorem in a single optimization process as a robust control design procedure against parameters uncertainty. This approach is realized by integrating various constraints functional

Induction machines are often preferred in industrial applications at present. Therefore, it is an important problem to know the electrical parameters of induction machines correctly. Electrical parameters of induction motors can be obtained experimentally by performing DC test, no-load rotor test, and locked rotor test. Furthermore, equivalent circuit parameters of the induction machines can be estimated

Performance and energy efficiency of induction motors (IM) used in electric vehicle (EV), by applying two control methods, namely the indirect field-oriented control (IFOC) method and the direct torque control (DTC) method, are compared. The tracking accuracy under changing vehicle speed circumstances for different speed controllers (classical PI, fuzzy logic, and sliding mode speed controllers) is

Fe89.5Ni8Zr2.5 alloy was synthesized by mechanical alloying followed by pressureless sintering at various temperatures up to 900 °C. Microstructural evolution as a function of processing temperature was characterized using focused ion beam microscopy, transmission electron microscopy and X-ray diffraction techniques. The dependence of hardness on the microstructure was utilized to study the mechanical

Multi-converter power electronic system is nowadays popular in mobile vehicular applications. Different converters behave as Constant Power Loads (CPL) in a multi-converter system. These offer a negative impedance characteristic which results in a destabilizing effect on a converter driving them. Researchers have analyzed that the Buck converter supplying a CPL is unstable, but stability can be achieved

Multi-term extended Kantorovich method (MTEKM) is used to solve the bending problem of thin skew (parallelogram) functionally graded plate resting on the Winkler elastic foundation under uniformly distributed transverse load. Formulations are based on the classical plate theory (CPT) with the physical neutral surface is considered as the reference plane. Various configurations of clamped, simply supported

This paper introduces a compact three-phase modular multilevel inverter (MMLI) based on asymmetrical input multi-terminal for different ratings of PV systems. The proposed three-phase inverter utilizes reduced component counts. It combines three half-bridge cells for each phase for 7-level output voltage generation. Therefore, the proposed MLI exhibits less number of switching devices for the cost

After some other processes, α-Fe2O3 red powder particles -by-product of regeneration of spent pickling liquor in ARP in iron and steel industry- should be ground up to pigment grade to convert it to a value added product, red iron oxide pigment. In this study, grinding tests on α-Fe2O3 red powder were performed using four different types of laboratory-scale mills, namely the vibrating cup mill, vertical

Oil spillage occurrences are due to wars, accidents, drilling, storage, natural disasters, and rapid industrialization, which lead to huge amounts of waste discharge into adjacent areas. Soil contamination is also detrimental to associated structures and foundations. Therefore, in this research, experimental and numerical studies on laterally loaded piles near an oil-contaminated sand slope were conducted

In order to include the dynamic behavior of a mechanical system, consisting of a position controlled, periodically moving, parallel manipulator and its supporting frame in the motion design a computer model is developed. For the identification of unknown model parameters a method is presented which is based on the process value curve of the motion control system and the measured vibration response

In this paper, a robust yet simple and efficient method is proposed for a 2D image encryption. The purpose of this work is to plug the gap related to blind decryption and lack of randomness in optical transform domain which limits its application in encryption of data. The novelty of this work is in the method of generating multiple transform orders. Two piecewise linear chaotic maps (PWLCM) are used

Virtual machine migration is used in cloud computing for server consolidation, system maintenance, opportunistic power savings, and load balancing. Scatter-Gather VM live migration is a new type of virtual machine migration. It is proposed to decouple the source quickly and reduce the time to evict the state of a migrating virtual machine from the host. In Scatter-Gather live migration, the memory

This paper proposes a photovoltaic power conversion topology (PVPCT). The proposed PVPCT is connected to the utility grid, a PV array and emergency loads. The proposed PVPCT comprises a boost DC-DC power converter (DDPC) and a three-port power converter (TPPC). The TPPC has three ports: a DC port, a grid port and an isolated grid port. The input for the boost DDPC is connected to a PV array and the

Fibre reinforced polymer (FRP) composites have attracted significant attention in repairing existing and deteriorating structures since the traditional rehabilitation techniques have several limitations in terms of durability, self-weight and complex installation process. Prefabricated FRP composite jackets are the preferred solution in repairing bridge piles located both underwater and above the waterline

The Community Micro-Grid (CMG) is a coordinated local grid area served by one or more distribution substations supported by local renewable and other distributed energy resources (DER). In an islanded mode, the CMG stability reduces due to low inertia of the equivalent system and stochastic nature of renewable energy sources (RESs). To study the frequency stability of the islanded CMG system, this

The objective of this paper is to explain the design steps and performance analyses including energy consumption of a fixed-wing (FW) vertical take-off and landing (VTOL) unmanned air vehicle (UAV). The vehicle is designed from the beginning with the goal for low take-off weight and high aerodynamic performance. Aerodynamic design steps and sizing of both wing and control surfaces are demonstrated

A great number of monitoring technologies have been developed especially for complex systems within the critical zones such as electric power substations, nuclear energy systems. But also, there is no single instruction or standardization in fault-focused on-line/off-line monitoring applications due to the acceleration of technological developments. Field experts have difficulty in choosing which test

The basis of biometric authentication is that each person's physical and behavioural characteristics can be accurately defined. Many authentication techniques were developed over the years. Human gait recognition is one of these techniques. This article explores machine learning techniques for user authentication on HugaDB database which is a human gait data collection for analysis and activity recognition