برای دستیابی به مزیت رقابتی در شرایط عدم‌­اطمینان که آن تغییر ضروری است، یکی از چالش‌های بزرگ سازمان‌ها کاهش ریسک طریق ایجاد زنجیره‌های تأمین تاب‌آور است. تاب‌آوری زنجیره ‌تأمین توانایی مقابله با اختلال اشاره دارد یک رویداد غیرقابل‌پیش‌بینی بوده و دارای منابع داخلی خارجی مختلفی ازجمله بلایای طبیعی ریسک‌های عملیاتی پژوهش حاضر شبیه‌سازی توسط نرم‌افزار ارنا زنجیره‌ سنگ ساختمانی «کارخانه سنگبری آسم...

The aim of this study was to investigate the safety of injection of bone marrow aspirate concentrate during core decompression and to study its clinical (visual analogue scale; Harris-Hip-score) and radiological outcomes (magnetic resonance imaging). In this prospective and randomized clinical trial we evaluated 24 consecutive patients with non-traumatic femoral head necrosis (FHN) during a per...

The study of synchronous or asynchronous in (stochastic) neuronal populations is an important concept both theory and practice neuroscience. NPDS toolbox provides interactive simulation platform for exploring such processes MATLAB, looking through the lens nonlinear dynamical systems. includes two main components: neural population (de) synchronization, dynamics. One can investigate distributio...

This paper discusses the synchronization of three coupled chaotic FitzHugh–Nagumo (FHN) neurons with different gap junctions under external electrical stimulation. A nonlinear control law that guarantees the asymptotic synchronization of coupled neurons (with reduced computations) is proposed. The developed control law incorporates the synchronization error between two slave the slave neurons, ...

INTRODUCTION: Avascular necrosis of the femoral head (FHN) is a common complication with disabling effect for young patients after high dose corticosteroid treatment [1]. Recently, we could show that steroids have a vasoconstrictive effect on lateral epiphyseal arteries of the femoral head (FH) which could lead to FH ischemia and subsequent necrosis [2]. In the current study we investigated the...

BACKGROUND The offspring of alcohol-dependent individuals are at increased risk for alcoholism. The present study was designed to determine whether mesolimbic dopamine binding potential (BP), dopamine release, stress hormones, and subjective responses to intravenous amphetamine are different in nonalcoholic offspring from families with a history of alcohol dependence [family history positive (F...

This paper exploits the dynamical modeling, behavior analysis, and synchronization of a network of four different FitzHugh-Nagumo (FHN) neurons with unknown parameters linked in a ring configuration under direction-dependent coupling. The main purpose is to investigate a robust adaptive control law for the synchronization of uncertain and perturbed neurons, communicating in a medium of bidirect...

This paper presents an investigation of the dynamics of two coupled non-identical FitzHugh-Nagumo neurons with delayed synaptic connection. We consider coupling strength and time delay as bifurcation parameters, and try to classify all possible dynamics which is fairly rich. The neural system exhibits a unique rest point or three ones for the different values of coupling strength by employing t...

Spontaneous antispiral wave formation was observed during the simulation of typical reaction-diffusion systems using differential equations models. The equations for the FitzHugh-Nagumo (FHN), complex Ginzburg-Landau (CGL) and the two-variable Oregonator models were integrated using Runge-Kutta methods. It was found that antispiral waves can occur only near the Hopf bifurcation, i.e. the point ...