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An application of small aerial vehicles is described in this paper which presents an optimization of the camber position ever-changing using models and numerical analysis. During this study, the mechanics performance of a wing must be investigated over a profile of camber of 20 percent length of the chord from edge. The model was initially modelled using a software package and by adjusting the morphing wing system's modularity and reconfigurability. The angle of attack is also explored following a comparative analysis of the mechanics parameters. A considerable effect of morphing flap camber profiles on mechanics performance is observed in the results. As a supplementary validation, we provide an analysis of wind characteristics through ANSYS; we obtain the pressure coefficients, lift (CL), drag (CD), and lift-to-drag ratio (CL/ CD). The correlation between the CL, (CL/CD) and drag cut back simulations for several preferred shapes is analyzed when getting the results. For that reason forward in optimizing the cambered profile when morphing edges because the mathematical analysis associated with it has been shown improvements in CL from 15% to 30% when morphing edges. [ABSTRACT FROM AUTHOR]

This paper arose from the teaching of Models in Biology to take a new approach to problems they are familiar with, to come up with an articulate verbal model after a mental effort, to express it in rigorous mathematical terms, to solve corre-sponding equations (with the help of computers), and to analyze and interpret experimental data in terms of their (mathematical) models. We will investigate a mathematical model of branching by solving a system of partial equations (PDEs). The results will describe the success or failure of the growth of the fungus species studied, and we used some codes (pplane7, Pdepe) in numerical analysis because direct mathematical solution was difficult. [5] Tip death due to hyphal death, dichotomous branch-ing [ABSTRACT FROM AUTHOR]

The ABC flow for the stationary three dimensional Navier-Stokes equations is considered. The problem is formulated on the full periodic domain. The main object of the paper is the preliminary analysis of the solution curves and location of disconnected solutions from the main branch (stationary trivial solution defined by the forcing term in the ABC problem setup). It is noted that the disconnected solutions exist for two variants of the problem parametrization: A = B = C = 1 and A = B = 1,C = 2. [ABSTRACT FROM AUTHOR]

Members of double-symmetrical open cross-sections are widely used as columns in steel structures. In many cases columns are subjected not only to axial force but also local transverse force due to effect of beams connected to the columns. It results in compression in the column web that should be verified in the structural design. Current standard for design of joints in steel structures provides basic information for verification of this joint component. The design resistance of column web in compression is given as yielding resistance or, based on relative slenderness of the web, buckling resistance which takes into account buckling and crippling of the web that are considered using reduction factor. The complex behaviour of the column web in compression is affected by number of aspects, e.g. structural solution of the joint (bolted, welded, with or without end plate), level of normal stress resulting from axial force or possible interaction with shear. The paper focuses on selected aspects influencing the resistance of the column web in transverse compression and summarizes results of advanced geometrically and materially nonlinear numerical analysis which are compared with results determined using provisions in the standards. The numerical analysis was performed using computation system based on finite element method. As it is considered that the resistance of the column web in transverse compression is influenced also by the geometric properties of the cross-section including geometry of the flange-web transition, both rolled and welded cross-sections with various values of web slenderness were selected for the analysis. Along with evaluation of the results obtained in the frame of the study, suitability of different types of numerical models for investigation of this problem is discussed. [ABSTRACT FROM AUTHOR]

The paper reports a numerical campaign in which two point-supported elements made of laminated glass were investigated with FEM. The first element was a horizontal roof panel 3000×1500 mm2 supported at six locations and subjected to static, uniformly distributed load. The second element was a free-standing glass balustrade 900×1900 mm2 mounted to the structure by four-point supports and subjected to soft body impact. Four types of fixings were investigated: disk fixing, countersunk fixing, bonded disk fixing and countersunk fixing on a single layer. The analysis was aimed at the investigation of the influence of different point supports on the stress in the glass. For a selected connector, a comparative analysis using the FE software and an analytical method presented in DIN 18008-3 was performed. In addition, an analysis of a positive influence of a continuous handrail on the behavior of a row of free-standing glass balustrades was investigated. [ABSTRACT FROM AUTHOR]

This paper is concerned with a Holling-II stage-structured predator-prey system (in which predators are divided into immature and mature predator) with fear effect. The aim is to explore how parameters factors influence on the bifurcation behavior of the model. The theoretical works showing that transformation rate and maximum attack rate can lead to saddle node bifurcation, and transcritical bifurcation. In addition, fear rate may lead to occurrences a Hopf-bifurcation near positive equilibrium point. Numerical analysis ensures accuracy of the theoretical outcomes and testifies the existence of local bifurcations near the non-trivial equilibrium points. [ABSTRACT FROM AUTHOR]

Crop imagery is categorized into 3 different types, which are near-field images, satellite images and drone-based images. All these image types can be processed to determine crop growth, crop diseases and finally crop yield. Different algorithms have been proposed over the years which determine one or more of these parameters using a series of image segmentation, feature extraction, feature selection, classification and post-processing steps. Each of these steps requires a specialized set of algorithms to be employed to design an effective crop-image processing system. Due to the wide variety of algorithms present in the given field of work, the selection of the most optimum algorithm set for a given application is often ambiguous. For instance, if an application is trying to process satellite imagery, then identification of the best image-fusion methods for effective classification requires a lot of research, and thus increases the delay in designing the system. To reduce this ambiguity, this paper reviews these algorithm sets which identify the best techniques in terms of statistical parameters for a given application. Accuracy and error rates have been compared between different algorithms to give a clear idea about the performance of these algorithms. This comparison also allows researchers to identify best practices in terms of algorithm selection. [ABSTRACT FROM AUTHOR]

The paper deals with numerical modeling of slab in interaction with the subsoil. A 3D computational model and numerical analysis are focused primarily on taking into account physical nonlinearity. The fracture-plastic material model is used, where the parametric study is performed with different input parameters of fracture energy. For nonlinear calculation the Newton-Raphson method was chosen. The performed calculations are compared with the experiment of a fibre-reinforced concrete slab with dimensions of 2000 x 2000 mm. The slab was tested on a specialized testing device, which allowed to evaluate the load - displacement diagram. Calculation results are compared with the experimental data and finally comparison is performed. [ABSTRACT FROM AUTHOR]

The paper deals with numerical analysis of pretensioned experimental beams exposed to loading test. Pretensioned beams were designed as model structural specimens, adjusted to real dimensions of slab bridge beams, made of common concrete and new variant of high performance concrete with compressive strength about 100 MPa. Experimental beams were exposed to loading test for verification of load bearing calculation model, as compressive strength of HPC is on the border or oversteps the validity of current design codes. Numerical analysis was performed using software IDEA statica which enables to determine cogent effect of prestressing with respect to changes in time related to construction stages. Failure and cracking load appointed on the basis of experimental loading and numerical analysis are compared and discussed. [ABSTRACT FROM AUTHOR]

Nowadays, 3-D printing (or additive manufacturing) is a widely used technique in different branches (e.g. public healthcare, consumer goods, weapons development etc.) to produce various objects and products. In the last years, 3-D printing has also begun to be used in the fields of civil engineering. Today, the use of 3-D printing in civil engineering takes different forms. Authors of this paper focus on the use of 3-D printing for the development of plastic formworks for concrete which can substitute steel reinforcement. This technology has its limitations for now, but it is still worthy for the numerical investigation which will be necessary for practical designing of concrete structures with 3-D printed plastic reinforcement in future. For this reason, the numerical investigation of mechanical behavior of concrete element shaped and reinforced by 3-D printed formwork is performed within this paper. The flexural strength test is numerically simulated for this purpose. The result of the best numerical simulation is compared with the result of the practical flexural strength test which was obtained from the former experimental investigation. Based on this comparison, provisional insufficiencies of the used numerical approach are discussed. [ABSTRACT FROM AUTHOR]

Determination of the current condition, load-bearing capacity, and reliability of the existing structures is often a greatly time-consuming and complex task. There are two main approaches how to evaluate the condition of existing structures and find out the response of the structure under acting loads. The first method is to perform an analytical or numerical analysis of the structure. This method is often used, but the accuracy of the outcomes deeply depends on the input parameters used in the analysis. Alternatively, if the input parameters are not clearly known or the exact behavior of the structure during loading is required, the best way how to evaluate the structure is to perform a full-scale load test. This paper describes the process of preparation, execution, and evaluation of the in situ full-scale load test of the bowstring arch reinforced concrete bridge built between the 1920s and 1930s damaged during the Second World War, repaired in the 1970s with no further maintenance later on. [ABSTRACT FROM AUTHOR]

This paper presents the description of the preparation of aggregate irradiation experiment including the choice of sample types and preliminary numerical prediction of aggregate RIVE and damage under defined conditions for the research reactor LVR-15. Ten different samples from four countries were selected for the experimental investigation. The preliminary numerical analysis was performed for granite as the aggregate with the highest radiation-induced volumetric expansion (RIVE). Based on the prediction, the highest RIVE of 4.54 % at high-dose neutron fluence (0.585·1020 n/cm2, with energy E>10 keV) is expected. Thus, taking into account the sample size, the inner diameter of the irradiated capsule should be about 11 mm. The aggregate samples with the highest RIVE (granite) are expected to be damaged significantly even after irradiation to low-dose neutron fluence (0.208·1020 n/cm2, with energy E>10 keV) which will be captured during the post-irradiation examination. [ABSTRACT FROM AUTHOR]

In this study, the turbulent flow over symmetrical and unsymmetrical airfoils was investigated numerically at different inlet velocities. The airfoils chosen for the simulation are symmetrical (NACA 0015) and unsymmetrical (NACA 4412), which are the most conventional four-digit and widely used airfoils. These airfoils are vastly used for various applications such as aircraft wings, wind turbine blades, etc. While both of these airfoils were subjected to the same fluid principle, it gave contradictory results in their aerodynamic behavior. In this paper, two different meshing techniques were used for the airfoils and the numerical analysis of NACA 0015 and NACA 4412 was carried out to study their aerodynamic behavior. A 2D steady-state incompressible turbulent flow is used to model the computational issue. The performance of the turbulence model is also reviewed. The lift and drag coefficients of the airfoils were numerically measured using the k − ε turbulence model. This study briefs the aerodynamic flow characteristics of both airfoils and evaluates the pressure and velocity contours, lift force and drag force. [ABSTRACT FROM AUTHOR]

The novel coronavirus disease 2019 (COVID-19) has shown the danger that can be caused by small, airborne and contagious virus particles such as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). To prevent the mass spreading of such viruses, the use of electromagnetic waves could be used to combat the spreading of the virus. Particularly, the waves could force any virus particles to oscillate in resonance with the frequency of the wave and destroy themselves before the virus would enter the respiratory system. This paper describes the use of numerical simulations to analyze the effects of exposing a SARS-CoV-2 particle to electromagnetic waves at a range of frequencies and to determine which frequencies have the potential of causing resonance within the virus which would yield to the maximum energy absorption. Such technique could be utilized in preventive/protective devices and disinfection equipment. [ABSTRACT FROM AUTHOR]

Castellated beams are well contemporarily ascribable to their structural applications. The Castellated beams are manufactured by fragmenting hot-formed rolled section that is of I shape in then it is welded together. The numerical analysis is performed using ABAQUS software. Consequently flexural, shear behavior of Castellated beams, various size and shape of openings provided, depth of openings, usage of different kinds of stiffeners, columns with and without web openings are the attempts made up in different journal papers and he researchers. It is also found that the Finite element analysis of the beam shows better results. [ABSTRACT FROM AUTHOR]

Currently, the use of spline functions in the development of Science and technology is a topical issue. Spline features the classic interpolation has several advantages in terms of rapprochement from multiples. Based on clearly given experiments, the construction of a local interpolation cubic spline function was analyzed based on a linear combination of parabolas with 2 common points. In this paper, all the properties of the local interpolation cubic spline functions built at each interval at the connection node points are analyzed on the basis of several experimental data and on the basis of numerical processing. The continuity of local interpolation cubic spline functions at all connection nodes was checked using graphs and numerical analysis based on concrete examples. [ABSTRACT FROM AUTHOR]

In this paper, we consider the study of the extreme problem of the fictitious domain method based on the use of the Lagrange functional, with a multiplier defined on the actual boundary and associated with genuine boundary conditions. The theorem of the existence of a generalized solution of the auxiliary FDM problem is proved. The convergence of the solution of the auxiliary FDM problem is shown. For mathematical research, the theory of functional spaces and the technique of obtaining a priori estimates in functional spaces are used. To verify the effectiveness of the developed method, numerical analysis and comparison with other methods of solving the problem were carried out. [ABSTRACT FROM AUTHOR]

In the present paper, a time dependent source of identification p roblem f or a o ne d imensional d elay hyperbolic equation with Dirichlet condition is studied. The first order of accuracy difference scheme for this source identification problem is presented. Numerical analysis and discussions are presented. [ABSTRACT FROM AUTHOR]

The combination of plastic and creep analysis formulation are developed in this paper. The boundary element method and the finite element method are applied in plates in order to do the numerical analysis. This new approach is developed to combine the constitutive equation for time hardening creep and the constitutive equation for plasticity, which is based on the von Mises criterion and the Prandtl-Reuss flow. The implementation of creep strain in the formulation is achieved through domain integrals. The creep phenomenon takes place in the domain which is discretized into quadratic quadrilateral continuous and discontinuous cells. The creep analysis is applied to metals with a power law creep for the secondary creep stage. Results obtained for some models studied are compared to those published in the literature. The uncertainties in both geometric and mechanical properties are considered in order to obtain the structural response. The approach is illustrated in a plate subjected to incremental load, results show that there are high probabilities of exceeding the damage states, w, equal to 0.3, 0.6, 1.2, 1.8 and 2.4 while for values of w equal to 3.0, 3.6, 4.2, 4.8, 5.4 and 6.0 these probabilities are low. The obtained results are in good agreement and evinced that the Boundary Element Method could be a suitable tool to deal with combined nonlinear problems. [ABSTRACT FROM AUTHOR]

In this paper, we discuss the susceptibilities of a bilayer system which is comprised of ferroelectric (FE) and ferromagnetic (FM) material. At the interface between FE and FM, the magnetoelectric (ME) interaction exist, resulting in a ME coupling. The derivation of the susceptibilities of the bilayer system was started by determining the FE and FM energy densities. Then, the entire-cell effective medium method was employed to obtain effective susceptibilities of the bilayer system. As a result of the existence of ME coupling, we obtain not only ferromagnetic and ferroelectric susceptibilities, but also magnetoelectric and electro-magnetic susceptibilities. Here, magnetoelectric susceptibility relates magnetization and electric field while electro-magnetic susceptibility links the electric polarization and magnetic fields. We also found that the ME coupling also shifts the magnetic resonance frequency. [ABSTRACT FROM AUTHOR]

The main objective of the research work is to present the free vibration analysis of plates composed of one of the materials that have good performance and can be applied in many fields like buildings. Material that has such properties is Functionally Graded Material (FGM). FGM consists of a mixture of ceramics and metals through varying volume fractions, ceramic material as a heat barrier at the high-temperature side, and metal material with rigid properties and high conductivity at the low-temperature side. In this paper, the FGM plate is investigated using the finite element method. We use 3-node Triangular Mixed Interpolation of Tensorial Components (MITC3), widely used by researchers or commercial software. The MITC3 element is a triangular element that gives good performance to analyze plate problems, especially isotropic plate problems. We performed the numerical analysis to examine the performance and convergence behavior of the MITC3 FGM plate element in the case of rectangular plates with varying length to width ratios, and the results are compared with the reference solution. [ABSTRACT FROM AUTHOR]

The paper is devoted to investigation of mechanical response of an electro-viscoelastic structure (a structure with piezoelectric element attached to its surface) in case when electric voltage with prescribed parameters is applied to electrodes of piezoelectric element. A cantilever plate was considered as such a structure. An amplitude of displacements of the free end of the plate at resonant modes is considered as a mechanical response in case when forced steady-state vibrations occurring under kinematic or force loading are considered. Mechanical response of the structure is determined numerically using the ANSYS software package. Viscoelastic properties of a material of the plate are taken into account using the model with complex dynamic moduli. Within the frameworks of this paper relations between mechanical response of the structure and magnitude and polarity of electric voltage applied to electrodes of a piezoelectric element was obtained with respect to a type of excitation of vibrations. [ABSTRACT FROM AUTHOR]

Many soft robotic structures are developed using soft fluidic actuators, which are developed using elastomeric materials such as silicon rubber. Due to the complicated geometries and nonlinearity in the soft actuator's design, it becomes very difficult to predict their behavior analytically. Finite Element Method (FEM) analysis is a numerical technique which is utilized to predict the stress, strain, and deformation in such actuators design. In this paper, bending behavior of two soft pneumatic fingers with varying wall thickness are designed and compared. Bending angle configurations of the designed fingers are evaluated at 30 and 40 kPa of actuating pressure. The obtained results show that to achieve a bending angle of 116 degrees, finger 2 requires 40 kPa of actuating pressure whereas finger 1 requires 80 kPa. Due to low stiffness of finger 2 as compared to the finger 1, which is resulted due to thickness variation in the two designed fingers, much higher bending angle configuration can be achieved at very low pressure for the finger 2. [ABSTRACT FROM AUTHOR]

The presence of ducts surrounding wind turbines improves the performance by accelerating the wind at the entrance. The objective is to find a duct that produces improved wind power with low duct drag forces. Numerical analyses were carried out on the flow past a ducted wind turbine using computational software ANSYS Fluent. In this paper, the performance of six different ducts surrounding the wind turbine was compared. The duct geometries considered were S1) E423 aerofoil duct of chord length (L) / (throat diameter) D ratio=0.225 at 37.5 °, S2) duct with leading-edge slot, S3) duct with trailing edge slot, S4) duct with trailing edge flap, S5) duct with converging section and S6) duct with multiple slots. The performance improvement was evaluated using the average velocity in front of the blade plane and power output. The flow characteristics of conventional turbines and six ducted turbines were discussed. It was found that duct with trailing edge flap had shown higher power output with higher drag. The results indicate that the duct with multiple slots in the duct's circumference had equivalent power output to a fully closed duct. [ABSTRACT FROM AUTHOR]

Fourteen airfoils were selected in this research paper to build and optimize a small horizontal axis wind turbine for a low wind speed. By using Q-blade software and CFD simulations for a 0.5 m rotor radius and the tip speed ratio ranged from 3 to 10. In this paper selected airfoil such as E205, E214, E216, NACA2412, NACA4418, SG6040, SG6041, SG6042, SG6043, S1221, S2091, S7012, SD7034 were investigated. As the most suitable geometries, Airfoil E216 and SG6043 cast out by checking numerical simulations to gain more power at low Reynolds number. In this study comparing the drag coefficient, lift coefficient and lift to drag ratio with respect to angle of attack, the airfoil has been revised. A parametric optimization of the blade geometry and develop the new airfoil for small wind turbine rotor. The E216 airfoil is found to be better performance with below solidity of8.25%, while the NACA 2412 produces stronger solidityof 21.6% due to wake effects produced behind the rotor. A wind tunnel test, Q-Blade simulation and CFD analysis were performed on the design and optimized for the proposed small horizontal wind turbine rotor axis in order to apply low wind speed area. [ABSTRACT FROM AUTHOR]

A screw-type centrifugal pump is a kind of non-clog type pump and has been widely used, for instance, for drainage of rainwater as well as slurries and mud in sewage control systems. In order to avoid choking the impeller passage with the congestion of solids, the impeller is designed to have a wide passage which configuration is screw formed by a three-dimensional spiral blade added to a conical hub cone. This paper presents the results of pressure and velocity fields in centrifugal pump with single blade. In the pump tested, a volute with circular cross-section was used. The prediction of radial thrust is important and useful information for the safe operation and design of the bearings. Particularly, the fluctuation of radial thrust in this pump is large because of one blade. The tests were carried out for several flows, including above and below the nominal one. Effects of the time-steady flow in a single-blade pump are investigated by numerical method CFD (Computational Fluid Dynamics), specifically discussing the conditions of internal flow such as velocity and pressure. For a numerical approach the three-dimensional, viscous, unsteady flow field in the pump has been achieved by solving the unsteady Navier-Stokes equations (URANS) with a commercial code. Commercial code ANSYS CFX was used for the calculations. [ABSTRACT FROM AUTHOR]

In March 2021, an ultra-large container ship, the M.V Ever Given, was stranded at the southern part of the Suez Canal and blocked the two ways of the canal and subsequently deferred more than 100 vessels traversing between Asia and Europe. The blockage was cleared within five days; however, notwithstanding the short period, the incident had caused huge world trade losses. One of the prevailing causes of ship groundings is manoeuvring difficulties due to ship-bank interaction. This study is therefore aimed at understanding the effect of the ship's size on the ship-bank interaction in a canal. In this paper, a mathematical model was developed to study the effects of ship-bank interaction on the manoeuvring performance of a large container vessel in a canal, with different ship parameters. The results showed that the increase in size and speed significantly influenced the bank-effect and contributed to the eventual grounding of the ship. The effect of rudder surface area to counter the bank-effect was also investigated. This study showed that increasing the rudder surface area can improve the counter-actions of the ship against the bank effect. [ABSTRACT FROM AUTHOR]

The ship hull is the basic underlying structure of ship that makes the ship water tight or water proof. Meaning the hull prevents the water from entering the cargo, machinery.so hull are usually made of materials that have high mechanical properties, impact less and less water absorption qualities.conventional hull materials used where steel wherein the boat becomes too heavy in considerations with its high strength, abrasion resistance etc.so composite materials where used which give a single structure offering solutions of strength, durability, light speedy, watertight structure in the manufacturing of boats for past 50 years. This novel paper focuses on a comparative study of composite materials previously used with further improvements in characteristics such as increased strength, ease of manufacturing, more impact resistance and increase is load tensile and compressive load bearing characteristics. The composite materials comprising of GFRP+graphite powder and GFRP+Aluminum powder was tested and analyzed experimentally for enhancement in various mechanical properties, structural and water absorption capabilities, and optimum designs further obtained. Even though experimental analysis where performed numerical analysis of these composite models is yet to done which would lead to determining more efficient structures with best materials used. [ABSTRACT FROM AUTHOR]

The main purpose of the suspension system is to absorb the vibrations from wheels. To compromise between the two conflicting criteria i.e. road holding and ride comfort, passive suspension system is most suitable. The passenger discomfort is caused due to unwanted vibrations which are transmitted through unsprung mass. The numerical analysis using Simulink MATLAB software is used to determine Ride comfort of two suspension systems based on quarter car model. The experimental setup is developed and vibration analysis is performed using multichannel FFT analyser. The mathematical analysis result of the two different models of the suspensions is compared with experimental analysis. The aim of paper is to investigate effect of sprung mass on ride comfort at constant speed with input 0.1m peak stroke which generated a waveform resembling to half sine wave. The mathematical model is developed and analysed in Simulink MATLAB software. [ABSTRACT FROM AUTHOR]

Investigation still on board for finding the best techniques to develop the thermal and hydraulic performance of the heat exchanger. One of the useful, practical methods for finding the modification is the numerical analysis. This numerical analysis was obtained by modelling and simulation using ANSYS FLUENT software. In this present work five elements were modelled and simulated of three different configuration models, helical tape, rectangular and triangular straight strip inserts were inserted inside the inner pipe. This simulation was employed according to the working operation conditions of the real practical double pipe heat exchanger. The results show that, the helical tape configuration demonstrated the effective enhancing technique of the heat transfer, which is improving the thermo-hydraulic performance of this type of heat exchanger in this study. According to this work, the technique of studying numerically the design enhancement of the heat exchanger can produce an excellent result and gives a good recommendation to transfer it into practical work. [ABSTRACT FROM AUTHOR]

: Tilt of G+4 RCC buildings with isolated foundation systems due to differential settlement is one of the common problems, which affects the overall structural stability of the real life buildings. Tilt may be caused due to excavation of adjacent plots of the building without adequate lateral support, poor workmanship, overloading on cantilevered portions above first floor level, improper design and construction etc. The overall stability of the tilted RCC buildings mainly depend on the type & amount of tilt along with the building configuration. NDT results of concrete members are nowadays practiced extensively in real life situation to evaluate the strength and quality; which are sparse to assess the stability of the structures as these are of qualitative and piecewise manner. Additionally, the seismic force; which depends on the seismic zone of the building site, adversely affects the building stability. Thus, the parametric study on the stability of various buildings subjected to different type & extent of tilts; situated on different seismic zones seems to be significantly important. This present paper aims to assess the stability of various G+4 RCC buildings of same plan area & height, with different number of bays in their structural system, located at different seismic zones; when subjected to different extent of uniaxial and biaxial tilts. Different G+4 RCC buildings with different structural configurations and located at different seismic zones; subjected to different types & amount of tilt are duly considered in the finite element framework of SAP2000 for the parametric numerical analyses. Along with type & extent of tilt, it is found that building configuration and zone of seismicity significantly affects the overall stability of these multistoried tilted buildings. The present study may have a great scope for safety assessment and upgradation of real life medium high RCC building structures subjected to tilt. [ABSTRACT FROM AUTHOR]

One of the most common problems with quasi-Newton methods is how to select the suitable quasi-Newton equation while operating the algorithm. In this paper, a new modification Quasi-Newton equation is proposed based on recent quasi-Newton equation of the Biglari et.al. method. Theoretical analyses and numerical computations using standard functions, as well as comparison with Broyden-Fletcher-Goldfarb-Shanno (BFGS) show that the proposed new type is globally convergent and computationally efficient. [ABSTRACT FROM AUTHOR]

Even though symmetrical airfoil has less lift-drag ratio and the undesirable stall characteristics it has been used in the rotary wing applications. Increasing the aerodynamics efficiency by using the different flow control methods are the important research in recent years. Amplifying the lift coefficient without causing any negative impact on the drag coefficient will create the great impact on aeronautical domain. Hence this paper objective is by using cylinder rotation- an active flow control method to improve the aerodynamic efficiency over the airfoil. To get the optimum values of lift and drag coefficient the flow parameters, velocity ratios of the cylinder Vc / V∞ and the location of the cylinder have been used. The model of the NACA 0012 airfoil with cylinder is developed by using Inventor and the numerical analysis were carried out by using Ansys fluent. Analysis was carried out for the velocity ratios of 0.5,1 and 2 by placing the cylinder at the chordwise locations of 10% to 50% of its length. When compared the results of NACA 0012 airfoil with cylinder and without cylinder there is a significant growth in aerodynamic efficiency and delayed in stall angle. Generally, the performance was increase in the ratio of cylinder rotation speed Vc to the freestream speed V∞. There appears to be an optimal location for the rotating cylinder which gave quite promising results. [ABSTRACT FROM AUTHOR]

The paper deals with the interaction of reinforced concrete slab with subsoil. The subject of the paper was the processing of nonlinear analysis of the performed experiment. The specifics of the solved task include that it connects the design of concrete structures and geotechnical tasks. It was necessary to take into account the actual behavior of the concrete structure and subsoil. The experiment includes a reinforced concrete slab by dimensions 2000 x 2000 mm, 150 mm thickness. Reinforcement was used netting steel bar ⊘ 8 / 100 mm. For the research task is important, that due to cracking in the reinforced concrete slab, its stiffness bending changes. This change affects the life of the structure due to its degradation. The paper focuses on the comparison of the experiment with the numerical model in two selected load cases. For numerical modeling was used the deformation variant of the finite element method and the 30 computational model. In the computational model, the fracture-plastic material model was chosen for concrete. The Newton-Rapson method was chosen for nonlinear calculation. [ABSTRACT FROM AUTHOR]