An optimal three-point eighth-order iterative method without memory for solving nonlinear equations with its dynamics

We present a three-point iterative method without memory for solving nonlinear equations in one variable. The proposed method provides convergence order eight with four function evaluations per iteration. Hence, it possesses a very high computational efficiency and supports Kung and Traub's conjecture. The construction, the convergence analysis, and the numerical implementation of the method will be presented. Using several test problems, the proposed method will be compared with existing methods of convergence order eight concerning accuracy and basin of attraction. Furthermore, some measures are used to judge methods with respect to their performance in finding the basin of attraction.Comment: arXiv admin note: substantial text overlap with arXiv:1508.0174

The effect of an Islamic spiritual program on life satisfaction of elderly patients with hypertension

زمینه وهدف: رضایت از زندگی نگرشی است که فرد از زندگی خود داردو به طور تنگاتنگی با رفاه و آسایش شخص مرتبط است. هدف از انجام این پژوهش تعیین تاثیر یک برنامه معنوی اسلامی بر رضایت از زندگی سالمندان مبتلا به پرفشاری خون مراجعه کننده به مراکز سلامت شهر اصفهان می باشد. روش بررسی: این مطالعه ازنوع تجربی می باشد که در سال 1393 انجام شد.پنجاه و دو سالمند مبتلا به پرفشاری خون به صورت تصادفی در دو گروه آزمون وکنترل قرار گرفتند. افراد گروه آزمون در 8 جلسه برنامه معنوی اسلامی گروهی که در دو مرکز از مراکز سلامت شهر اصفهان برگزار می شد، شرکت کردند. پرسشنامه رضایت از زندگی دینر در سه مرحله پیش آزمون،پس آزمون وپیگیری (یک ماهه) در دوگروه تکمیل شد.از نرم افزار آماری 20spss وآزمونهای کای اسکوئر،t مستقل وآنالیز واریانس با مشاهدات تکراری جهت تجزیه وتحلیل داده ها استفاده شد. یافته ها: نتایج نشان داد تفاوت معنی داری بین دو گروه آزمون وکنترل از نظر سن،جنس،میزان تحصیلات،وضعیت تاهل،وضعیت اشتغال، درآمد ماهیانه ،مدت ابتلا به پرفشاری خون ،ابتلا به بیماری مزمن دیگر غیر از پرفشاری خون وجود نداشت (05/0P تفاوت معنی داری پیداکردو یکماه پس از مداخله نیز تفاوت آماری معنی داری بین میانگین نمره رضایت از زندگیگروه آزمون نسبت به گروه کنترل001/>P وجود داشت. نتیجه گیری: نتایج این مطالعه بیانگر اثربخشی برنامه معنوی اسلامی بر رضایت از زندگی در سالمندان می باشد.بنابراین از این مداخله می توان جهت افزایش رضایت از زندگی سالمندان مبتلا به پرفشاری خون استفاده نم

A Low-Energy Fast Cyber Foraging Mechanism for Mobile Devices

The ever increasing demands for using resource-constrained mobile devices for running more resource intensive applications nowadays has initiated the development of cyber foraging solutions that offload parts or whole computational intensive tasks to more powerful surrogate stationary computers and run them on behalf of mobile devices as required. The choice of proper mix of mobile devices and surrogates has remained an unresolved challenge though. In this paper, we propose a new decision-making mechanism for cyber foraging systems to select the best locations to run an application, based on context metrics such as the specifications of surrogates, the specifications of mobile devices, application specification, and communication network specification. Experimental results show faster response time and lower energy consumption of benched applications compared to when applications run wholly on mobile devices and when applications are offloaded to surrogates blindly for execution.Comment: 12 pages, 7 figures, International Journal of Wireless & Mobile Networks (IJWMN

On game value for a pursuit‑evasion differential game with state and integral constraints

A pursuit-evasion differential game of countably many pursuers and one evader is investigated. Integral constraints are imposed on the control functions of the players. Duration of the game is fixed, and the payoff functional is the greater lower bound of distances between the pursuers and evader when the game is completed. The pursuers want to minimize, and the evader to maximize the payoff. In this paper, we find the value of the game and construct optimal strategies for the players

Investigation of the excess cash holding on value of firms

The present research tried to study the effect of the excess cash holding on firm value. The participants of the present research include the companies accepted in Tehran Stock Exchange during the years between 2003 and 2010, which are among the five industries of food, cement, drugs, chemicals, and automobile parts and by using a sampling method 482 year-companies were selected. To test the research hypotheses, two multiple regression models were used, which were first supplied by utilizing a model devised by Opler & et al (1999) and it is called OPSW to determine the appropriate level of cash holdings for each company in each year. Then, Lozano's model (2011) was utilized to measure the effect of the excess cash holding on firm value. The results of testing the research hypotheses showed that the excess cash holding affects firm value negatively meanwhile the investment policy

New modification of Maheshwari's method with optimal eighth order convergence for solving nonlinear equations

Abstract In this paper, we present a family of three-point with eight-order convergence methods for finding the simple roots of nonlinear equations by suitable approximations and weight function based on Maheshwari's method. Per iteration this method requires three evaluations of the function and one evaluation of its first derivative. These class of methods have the efficiency index equal to ${8^{{\textstyle{1 \over 4}}}} \approx 1.682$. We describe the analysis of the proposed methods along with numerical experiments including comparison with the existing methods. Moreover, the attraction basins of the proposed methods are shown with some comparisons to the other existing methods