Showing papers in "kuwait journal of science in 2015"

Approximation of the KdVB equation by the quintic B-spline differential quadrature method

Abstract: In this paper, the Korteweg-de Vries-Burgers’ (KdVB) equation is solved numerically by anew differential quadrature method based on quintic B-spline functions. The weightingcoefficients are obtained by semi-explicit algorithm including an algebraic system with fivebandcoefficient matrix. The L2 and L∞ error norms and lowest three invariants 1 2 I , I and3 I have computed to compare with some earlier studies. Stability analysis of the method isalso given. The obtained numerical results show that the present method performs better thanthe most of the methods available in the literature.

Extension of Mazhar’s theorem on summability factors

Abstract: By (X; Y ) we denote the set of all sequences such thatPa nnis summable X wheneverPa n is summable Y , where X and Y are sum-mability methods. In this paper we characterize the set (jC; jk ;N; p n) fork > 1; >

A survey of data mining algorithms used in cardiovascular disease diagnosis from multi-lead ECG data

Abstract: Remote cardiovascular disease (CVD) diagnosis from ECG plays an important role in healthcare domain. Data mining, the major step in the process of the extraction of knowledge usingdescriptive and predictive algorithms that aid in making proactive decisions, has also been usedfor CVD diagnosis. Recently, diverse techniques have been developed for analyzing the ECGsignals. However, due to the diversity of techniques used, terminologies, performance measuresused in different techniques makes analysis and comparing of results thwarting. The aim of thiswork is to essentially explore and present the analysis of different data mining algorithmsproposed earlier in literature for CVD diagnosis, their advantages and limitations. This paperpresents various techniques for CVD diagnosis using data mining from an ECG signal underfour major phases – ECG Acquisition, ECG Compression, ECG Feature Extraction and ECGdiagnosis. The primary aim of this paper is to categorize the various researches done in thisregard to provide a glossary for interested researchers and to aid in identifying their potentialresearch direction.

Numerical solutions of the MRLW equation by cubic B-spline Galerkin finite element method

Abstract: In this paper, a numerical solution of the modified regularized long wave (MRLW) equationhas been obtained by a numerical technique based on a lumped Galerkin method using cubicB-spline finite elements. Solitary wave motion, interaction of two and three solitary waveshave been studied to validate the proposed method. The three invariants ( 1 2 3 I , I , I ) of themotion have been calculated to determine the conservation properties of the scheme. Errornorms 2 L and ∞ L have been used to measure the differences between the exact and numericalsolutions. Also, a linear stability analysis of the scheme is proposed.

On the solutions of a three-dimensional system of difference equations

Abstract: In this paper, we obtain the explicit solutions of the three-dimensional system of difference equations with multiplicative terms, which extended some results in literature. Also, by using explicit forms of the solutions, we study the asymptotic behaviour of well-defined solutions of the system.

Fixed points of weakly compatible mappings in fuzzy metric spaces

Abstract: In this paper, we prove some common fixed point theorems for weakly compatible mappingsin fuzzy metric spaces with common property (E.A) and give some examples to illustrate ourresults. As an application to our main result, we present a common fixed point theorem forfour finite families of self mappings in fuzzy metric spaces by using the notion of the pairwisecommuting mappings. Our results improve and extend some relevant results existing in theliterature.

Selection of the optimal technology for surface mining by multi-criteria analysis

Abstract: The selection of optimal technology for surface mining of mineral deposits is a standarddecision-making problem. The aim of this paper is to demonstrate the potential of thecombined AHP and ELECTRE methods in selecting the optimal technology usingthe open pit coal mine “Ugljevik East” (Ugljevik Istok) as an example. In order toresolve the problems encountered, the three types of technologies were taken intoconsideration with regards to the eight criteria for selecting the optimal solution. Thecriteria include the most important aspects of selecting the optimal technologies, suchas geology and geotechnical engineering, ecology, economy, etc. In addition, AHP isused to analyse the structure of the technology selection process and to determine thesignificance and impact of certain criteria in the selection process, while ELECTREmethod is used for the final ranking of alternatives. The obtained results indicate thatthe proposed combined method provides extraordinary results and that it can be used toresolve various, even the most complex problems that occur in mining engineering.

On -recurrent almost Kenmotsu manifolds

Abstract: The object of this paper is to investigate -recurrent and -symmetric almost Kenmotsumanifolds with the characteristic vector fields belonging to some nullity distributions.

The first integral method for the perturbed Wadati-Segur- Ablowitz equation with time dependent coefficient

Abstract: The first integral method (FIM) is used to construct traveling wave solutions ofperturbed Wadati-Segur-Ablowitz (pWSA) equation with time dependent coefficient inthis manuscript. We obtained some different solutions by using Gauge transformationwith time dependent coefficient of variable transformations. The method is aneffective method to construct the different types of exact solutions of nonlinear partialdifferential equations (NPDE).

Optimized construction of various classification models for the diagnosis of thyroid problems in human beings

Abstract: Thyroid disorder is a major public health problem. Early detection of thyroid disorder is anincreasingly important area in the field of medical diagnosis, pattern recognition, machinelearning and data mining. Thyroid disorder, either over production (hyperthyroidism) or lessproduction (hypothyroidism) results in imbalanced state of thyroid hormone stimulation inhuman beings. So, controlling this disorder has become a central issue in healthcare and needsgreat attention. This research critically examines different classification models constructedusing a novel mathematical ranked improved F-score ordering (RIFO) applied to thyroiddataset taken from machine learning repository, University of California, Irvine. A total ofnine possible and effective feature subsets have been constructed and each subset is testedwith three most benchmarked algorithms namely C4.5, multilayer perceptron (MLP) andradial basis function network (RBFN) using tenfold cross-validation and various training-testpartitions. The obtained results show diverse conclusions, but one with interesting and highestaccuracy has been presented. From the results, it is observed that MLP has emerged with anoutstanding performance of 98.15%, which is greater than all earlier research. The dataset has3 classes, 5 features and 215 records (hypo=30, hyper=35, normal=150).

Some convergence and data dependence results for various fixed point iterative methods

Abstract: We have compared rate of convergence among various iterative methods. Also, wehave established an equivalency result between convergence of two recently introducediterative methods and we prove a data dependence result for one of them.

Nonlinear vibration of mechanical systems by means of Homotopy perturbation method

Abstract: In this study, it has been tried to present a new approximate method by usingHomotopy Perturbation Method (HPM) for high nonlinear problems. Three differentexamples are considered and the application of the Homotopy perturbation method isstudied. Runge-Kutta algorithm is used to obtain numerical results. Another analyticalmethod called Energy Balance Method (EBM) is applied to compare the results ofHPM and Runge-Kutta algorithm. It has been shown that only one iteration of themethod prepares high accurate solution for whole domain. It has been established thatHomotopy perturbation method does not need any linearization and overcome thelimitations of the perturbation methods. Normal 0 false false false EN-US X-NONE AR-SA

Modelling and measuring the quality of online services

Abstract: A distributed application may be composed of global services provided by differentorganisations and have different properties. Providing provisioned services is of primaryimportance due to the multi-tenant and potentially multi-provider nature of servicecomputing paradigms. Quality of Services (QoS) has been used as a distinguishingfactor between similar services and as a criterion for service selection. To date, themajority of research on QoS is not comprehensive in identifying QoS suitable for onlineopen environments with diverse services.In addition, a lot of studies that is dedicatedto build QoS models are omitting the evaluation methods for many QoS. Therefore,there is a need for a QoS model that is comprehensive. Accordingly, the contributionin this paper compromises a generic QoS model that identifies a comprehensive QoSmetrics and their evaluation approaches. As a consequence, this study should be auseful reference to academic and industry researchers in the web-based service andonline service discovery, selection, composition, and management. Experiments areconducted to test various QoS metrics from the proposed QoS model.

On certain convergence of S-iteration scheme in CAT(0) spaces

Abstract: The aim of this paper is to study convergence behaviour of S-iteration scheme in CAT(0)spaces for generalized nonexpansive mappings. In process, several relevant results of theexisting literature are generalized and improved.

Taxonomy and distribution of two newly recorded genera in Saudi Arabia

Abstract: Countries in the Arabian Peninsula have undergone strenuous plant collections duringthe past two decades as part of enriching various Herbaria in the region or producingand updating the flora of the region. Recent botanical explorations in the southwesternparts of Saudi Arabia have yielded interesting specimens of two distinct taxa. Criticalstudy of these specimens revealed that they belong to two genera previously notreported for the flora of Saudi Arabia. Descriptions and photographs of the newlyreported taxa, viz. Encelia Adanson and Galinsoga Ruiz & Pav., both belonging toAsteraceae, are provided for easy identification. A brief account on the taxonomy anddistribution of the two genera in Saudi Arabia are also provided.

Generalized Bertrand curves with timelike (1,3)-normal plane in Minkowski space-time

Abstract: In this paper, we reconsider the (1,3)-Bertrand curves with respect to the casualcharacters of (1,3)-normal plane which is a plane spanned by the principal normal andthe second binormal vector fields of the given curve. Here, we restrict our investigationof (1,3)-Bertrand curves to the timelike (1,3)-normal plane in Minkowski spacetime.We obtain the necessary and sufficient conditions for the curves with timelike(1,3)-normal plane to be (1,3)-Bertrand curves and we give the related examples forthese curves.

An intumescent flame retardant - expandable graphite: Preparation, characteristics and flame retardance for polyethylene

Abstract: A combined intumescent flame retardant expandable graphite (EG), with an initial expansiontemperature of 155°C and expansion volume of 515 mL g-1, was successfully prepared based ona chemical intercalation method of material graphite under oxidation of KMnO4, intercalationof H2SO4 and Na4B2O7· 10H2O at the mass ratio C : KMnO4 : H2SO4 (98%) : Na 4B2O7· 10H2Oof 1.0 : 0.4 : 5.5 : 0.6 (H2SO4 diluted to a mass concentration of 80-wt. % before reaction),and characterized by expansion volume (EV), initial expansion temperature, X-ray diffraction(XRD). The flame retarding and thermal properties of LLDPE/EG and LLDPE/EG/APPcomposites (LLDPE-Linear low density polyethylene; APP-ammonium polyphosphate) wereinvestigated and characterized by limiting oxygen index (LOI), Fourier transform infraredspectroscopy (FTIR), thermal gravimetric (TG) and differential thermal analysis (DTA). Theresults showed that addition of EG (30-wt. %) increased the LOI of 70LLDPE/30EG compositeto 28.4 %. Even more, the synergistic effect of 20% EG together with 10% APP improvedthe LOI of 70LLDPE/20EG/10APP composite to 30.5%. At the same time, temperaturescorresponding to a 1% weight loss and a maximum weight loss rate increased at about 50°C and2°C, respectively. The 70LLDPE/10APP/20EG composite exhibited higher flame retardancyeven at a lower residual chars than 70LLDPE/30EG specimen. Cohesive and dense charlayer caused by swollen expanded graphite and decomposing products of APP played a moreimportant role in improving thermal stability and flame retardancy than weight of residualcarbon. The intercalated borate was more effectual in improving the flame retardancy than thedirect additive of Na4B2O7· 10H2O.

Assessment of soil moisture through field measurements and amsr-e remote sensing data analysis over kuwait desert

Abstract: Field work was conducted 24 times between April 2011 and September 2013 in the KISR (Kuwait Institute of Scientific Research) protected site located at Sulaibiya with the intent of measuring soil moisture at 16 specific locations over a 50 sq. km area. Soil moisture was measured using the thermo-gravimetric method. Soil profile measurement was also conducted up to a depth of 1.2 m to estimate sub-surface soil moisture. The field work estimated soil moisture variation during the wet and the dry seasons and over 16 different locations in the KISR site. The field measurements indicate that the soil moisture varies from 0.11 m3 m-3 in the wet season to less than 0.01 m3 m-3 in the dry season. The standard deviation of the spatial soil moisture variation ranges from 0.02 m3 m-3 in the wet season to less than 0.0009 m3 m-3 in the dry season. Another study is conducted in this paper using remote sensing data of soil moisture (NASA product) from the Advanced Microwave Scanning Radiometer (AMSR-E) on the Earth Observing System (EOS) Aqua satellite. AMSR-E instrument provides Volumetric Soil Moisture (VSM), Brightness Temperatures and Vegetation Water Content (VWC) during nine years from 2003 to 2011 all over the land mass of the Earth. The AMSR-E derived monthly averaged soil moisture over the Kuwait study area was found to vary between a minimum of 0.06 m3 m-3 in August to a maximum of 0.083 m3 m-3 in January. The standard deviation of the spatial variation of soil moisture ranges from of 0.004 m3 m-3 in August to 0.017 m3 m-3 in January. As the KISR site in Sulaibiya has an area of 50 sq. km area while the AMSR-E pixel area is 625 sq km, a comparison between field measurements and soil moisture comparison is not adequate due to the difference in resolution. However some indications of general trends of soil moisture variations are studied.

Performance improvement using an automation system for recognition of multiple parametric features based on human footprint

Abstract: Rapid increase in population growth has made the mankind to delve in appropriate identificationof individuals through biometrics Foot Print Recognition System is a new challenging areainvolved in the Personal recognition that is easy to capture and distinctive Foot Print has itsown dimensions, different in many ways and can be distinguished from one another Themain objective is to provide a novel efficient automated system for Personal Recognitionusing Foot Print based on structural relations among the features in order to overcome theexisting manual method This system comprises of various statistical computations of variousfoot print parameters for identifying the factors like Instep-Foot Index, Ball-Foot Index, Heel-Index, Toe- Index etc The parameters are trained using Neural Network method for the humanrecognition The input of this system is the naked footprint and the output gives performancerecognition rate This system is very simple, easy and efficient resulting to time complexity

Estimation of the phenolics content of St. John’s wort (Hyperıcum perforatum L.) grown under different water and salt levels based on reflectance spectroscopy

Abstract: Accumulation of phenolics were examined in greenhouse-grown Hypericum perforatum plants as effected by three different salts which were MgSO4, CaCl2, and NaCl in the salt concentrations of 0.03 (control), 1, 2.5, 4, and 8 dS/m for each salt. Three different water stress levels, which were 80, 100, and 120% were applied to all three salts mentioned above. Multi regression analyses were performed to describe the effects of water stress and salt levels on phenolics accumulation. As a result of ANOVA and multi-regression analysis, it was found that there was close relationship between actual and predicted phenolic contents in Hypericum perforatum. HPLC analyses were used to determine quercetin, quercitrin, isoquercetin, hyperoside, rutin, and chologenic acid contents. The relationships between water stress and different salt levels, and phenolics accumulation were determined by spectral reflectance values. The r values for quercetin, quercitrin, isoquercetin, hyperoside, rutin, and chologenic acid were determined as 0.83, 0.82, 0.91, 0.88, 0.84, and 0.87, respectively. All r-values and standard errors of the equations were found to be significant at the p<0.001 level.

On the quaternionic Mannheim curves of Aw(k)-type in Euclidean space E3

Abstract: In this paper, we consider that the curvature conditions of Aw(k)-type (1≤ k ≤ 3) quaternioniccurves in Euclidean space E3 and investigates quaternionic Mannheim curves α:I →Q withk ≠ 0 and r ≠ 0 . Besides, we show that quaternionic Mannheim curves are Aw(2) -type andAw (3)-type quaternionic curves in E3. But, there is no such a Mannheim curve of Aw(1) -type.

On some generalized statistically convergent sequence spaces

Abstract: In this paper we construct some generalized new difference statistically convergentsequence spaces defined by a Musielak-Orlicz function over n − normed spaces. Wealso study several properties relevant to topological structures and inclusion relationsbetween these spaces.

On a subclass of p-valent analytic functions involving fractional q-calculus operators

Abstract: In this paper, we consider a new subclass of p-valent analytic functions in the open unitdisk involving a fractional q-differeintegral operator For this subclass of functions,we derive the coefficient inequality and some distortion theorems Special cases of themain results are also mentioned

On a Tauberian theorem for the weighted mean method of summability

Abstract: We investigate conditions needed for a weighted mean summable series to beconvergent by using Kloosterman’s method. The results of this paper generalize thewell known results of Landau and Hardy.

Adsorption of malachite green from waste water using prosopis juliflora bark carbon

Abstract: Adsorption behavior of malachite green from waste water using prosopis juliflorabark carbon was investigated. The effect of contact time, adsorbent dose, solution pH,initial concentration of malachite green and temperature are investigated. Freundlichand Langmuir isotherms are used to determine the adsorption capacity of prosopisjuliflora bark carbon as an adsorbent. The entropy change (ΔS0) values and enthalpychange (ΔH0) values are calculated from the slope and intercept of the linear plotof lnK0 versus 1/T. The free energy change (ΔG0) is calculated from the equilibriumconstant (K0) value. The equilibrium constant (K0) for the adsorption process isdetermined from the slope of the plot of ln(qe/ce) against ce. The experimental valuesof entropy, enthalpy and free energy indicate that the adsorption of malachite green isa physical adsorption. The kinetic studies of malachite green follows pseudo secondorder and intra-particle diffusion model.

A population model of two-strains tumors with piecewise constant arguments

Abstract: In this study, the population growth of the brain tumor GBM, is constructed such as( )( ( ) ( [ ] )) ( ) ( [ ] ) ( ) ( [ ] )( )( ( ) ( [ ] )) ( [ ] ) ( ) [ ]1 1 1 2 1 12 2 1 2 1 2d = ( ) rx t R x t x t x t y t d x t x tdd =r y t R y t y t x t y t d y( ) ( t )dx px tty t ytα α γβ β γ⎧ + − − ⎡ ⎤ − ⎡ ⎤ − ⎡ ⎤ ⎣ ⎦ ⎣ ⎦ ⎣ ⎦ ⎪⎪⎨⎪− − ⎡⎣ ⎤⎦ + ⎡⎣ ⎤⎦ − ⎡⎣ ⎤⎦ ⎪⎩(A)where t = 0 , the parameters 1 2 1 2 1 1 2 1 2 1 α ,α , β , β ,γ , p, d , d ,R , R , r and 2 r are positivereal numbers and [[t]] denotes the integer part of t∈[0,8) . System (A) explains a tumorgrowth, that produces after a specific time another tumor population with different growth rateand different treatment susceptibilities. The local and global stability of this model is analyzedby using the theory of differential and difference equations. Simulations and data of GBM givea detailed description of system (A) at the end of the paper.

An infinite dimensional fixed point theorem on function spaces of ordered metric spaces

Abstract: In this study, we extend the notion of multidimensional fixed point and coincidencepoint theorem to infinite dimensional product spaces. We also prove some theorems,which generalizes some results that are known in this field.

Characteristic properties of the ruled surface with Darboux frame in E^3

Abstract: In this study, the ruled surface with Darboux frame is defined. Then, the ruled surfacescharacteristic properties which are related to the geodesic curvature, the normal curvature andthe geodesic torsion are investigated. The relation between the Darboux frame and the Frenetframe on the ruled surface is presented. Moreover, some theorems about the pitch and the angleof the pitch which are the integral invariants of the ruled surface with darboux frame are given.

Strongly secure certificateless one-pass authenticated key agreement scheme

Abstract: As certificateless public key cryptography (CLPKC) could solve the problem of keyescrow, recently it has been studied more and more. Certificateless authenticated keyagreement (CLAKA), as an important part of the CLPKC, also attracts considerableattention. So far, many kinds of provably secure one-pass CLAKA schemes have beenproposed. However, only few of them are given security proof in a formal model.In this paper, we propose a novel one-pass CLAKA scheme and demonstrate that itis provably secure under the gap bilinear computational Diffie-Hellman (GBCDH)assumption and the Gap Computational Diffie-Hellman (GCDH) assumption in theextended Canetti-Krawczyk (eCK) model. And as far as we know, our scheme is thefirst provably secure CLAKA scheme in the eCK model.

Slant submersions from almost paracontact Riemannian manifolds

Abstract: In this paper, we introduce slant submersions from almost paracontact Riemannian manifoldsonto Riemannian manifolds. We give examples and investigate the geometry of foliationswhich are arisen from the definition of a Riemannian submersion. We also find necessary andsufficient conditions for a slant submersion to be totally geodesic.