Development and application of real-time and interactive software for complex system

Soft materials have attracted considerable interest in recent years for predicting the characteristics of phase separation and self-assembly in nanoscale structures. A popular method for demonstrating and simulating the dynamic behaviour of particles (e.g. particle tracking) and to consider effects of simulation parameters is cell dynamic simulation (CDS). This is a cellular computerisation technique that can be used to investigate different aspects of morphological topographies of soft material systems. The acquisition of quantitative data from particles is a critical requirement in order to obtain a better understanding and of characterising their dynamic behaviour. To achieve this objective particle tracking methods considering quantitative data and focusing on different properties and components of particles is essential. Despite the availability of various types of particle tracking used in experimental work, there is no method available to consider uniform computational data. In order to achieve accurate and efficient computational results for cell dynamic simulation method and particle tracking, two factors are essential: computing/calculating time-scale and simulation system size. Consequently, finding available computing algorithms and resources such as sequential algorithm for implementing a complex technique and achieving precise results is critical and rather expensive. Therefore, it is highly desirable to consider a parallel algorithm and programming model to solve time-consuming and massive computational processing issues. Hence, the gaps between the experimental and computational works and solving time consuming for expensive computational calculations need to be filled in order to investigate a uniform computational technique for particle tracking and significant enhancements in speed and execution times. The work presented in this thesis details a new particle tracking method for integrating diblock copolymers in the form of spheres with a shear flow and a novel designed GPU-based parallel acceleration approach to cell dynamic simulation (CDS). In addition, the evaluation of parallel models and architectures (CPUs and GPUs) utilising the mixtures of application program interface, OpenMP and programming model, CUDA were developed. Finally, this study presents the performance enhancements achieved with GPU-CUDA of approximately ~2 times faster than multi-threading implementation and 13~14 times quicker than optimised sequential processing for the CDS computations/workloads respectively

Infinite product representation of solutions of indefinite problem with a finite number of arbitrary turning points

In this paper we consider the Sturm-Liouville equation (y\u27\u27+(rho^2phi^2(x)-q(x))y=0) on a finite interval I , say I=[0,1], under the assumption that I contains a finite number of arbitrary type turning points, which are zeros of (phi) in I . According to the four types of turning points, first we obtain the asymptotic forms of the solutions of (*) and then based on Hadamard\u27s factorization theorem we use this asymptotic estimates to study the infinite product representation of solutions of such equations. Infinite product form of the solution has a basic application in studies of inverse spectral problems

Infinite product representation of solutions of indefinite problem with a finite number of arbitrary turning points

In this paper we consider the Sturm-Liouville equation (y\u27\u27+(rho^2phi^2(x)-q(x))y=0) on a finite interval I , say I=[0,1], under the assumption that I contains a finite number of arbitrary type turning points, which are zeros of (phi) in I . According to the four types of turning points, first we obtain the asymptotic forms of the solutions of (*) and then based on Hadamard\u27s factorization theorem we use this asymptotic estimates to study the infinite product representation of solutions of such equations. Infinite product form of the solution has a basic application in studies of inverse spectral problems

A report about a rare case of tail gut cyst (TGC) in a 90-year-old man with sacrum ulceration

مقدمه: تیلگات کیست (Tailgut cyst=TGC) یک ضایعه کیستیک غیر شایع با منشا بقایای رودهPostnatal است که در فضای خلف رکتوم ایجاد می گردد. گزارش مورد: آقای 90 ساله اهل میناب با شکایت زخم در ناحیه ساکروم در مرکز آموزشی درمانی شهید صدوقی یزد پذیرش شد. بیمار در گرفتن شرح حال همکاری لازم را نداشت. بعد از انجام آزمایشات معمول، بیمار تحت عمل جراحی قرار گرفت و ناحیه مربوطه از نظر ترشحات تخلیه و ترمیم شد و طی عمل جراحی به توده ای در ناحیه ساکروم برخورد گردید، بعد از برش کامل و خارج کردن آن در بررسی آسیب شناسیTGC تشخیص داده شد. نتیجه گیری: با اینکه بروز بدخیمی در تیلگات کیست نادر است ولی باید در تشخیص افتراقی، تمام تومورهای خلف رکتوم به ویژه در زنان میانسال مورد توجه قرار گیرد

A New Active Anti-Vibration System Using a Magnetostrictive Bimetal Actuator

This paper introduces a new vibration reduction system using a magnetostrictive (Fe-Ga alloy) bimetal actuator. The proposed method (i) uses a magnetostrictive bimetal actuator instead of prevalent single material ones that need an auxiliary temperature control system and (ii) utilises a novel disturbance rejection control scheme that eliminates an unknown disturbance, without needing knowledge of its dynamics. In experiments, the vibration source is demonstrated as an unbalanced motor attached to the tip of a cantilever beam, resembling a beam-like element subject to ambiance vibrations. In the first step, the fundamental of this anti-vibration system is introduced and described. Then, analytical and data-driven modelling for the combination of the beam, the motor, and the bimetal is reported. These follow by model validation and impulse response analysis. Then, the proposed control system is introduced in detail. Experimental results indicate that the control system results in 33.6% decrease in beam vibration amplitude. Furthermore, the presented method in this paper can be employed as a design guideline for future applications

Survey the Relationship Between Attachment Style and General Self Efficacy with Homesickness Among College Students

AbstractGoal: study of effective factors on the Homesickness of college students is the one of important discussion in psychology and the extent domains of it. Then the goal of this research was to investigate the relation between Attachment Style and General Self Efficacy with Homesickness. Method: to this end, a clustered multistage random sampling of 150 students was selected and implemented the Homesickness questionnaire, Attachment style questionnaire and General Self Efficacy questionnaire. The gathered data were analyzed through stepwise regression and Pearson correlation by Spss software. Finding: the results indicated that significant correlation observed between factors. Between General Self Efficacy and Homesickness(r=-0.55 p<0.001), between Secure Attachment Style and Homesickness (r=-0.51 p<0.001), and between Anxious Attachment Style and Homesickness (r=0.48 p<0.001). Stepwise regression analyze indicated that Secure and Anxious Attachment Style and Genera self efficacy could predicate Homesickness. Result: the finding of present study on the whole, suggest that self efficacy and secure internal working model training and for new arrived college students could prevent of homesickness

Nanotechnology and supercritical fluids

Supercritical fluid (SCF) technology has become an important tool of materials processing in the last two decades. Supercritical CO2 and H2O are extensively being used in the preparation of a great variety of nanomaterials. The interest in the preparation and application of nanometer size materials is increasing since they can exhibit properties of great industrial interest. Several techniques have been proposed to produce nanomaterials using supercritical fluids. These processes, taking advantage of the specific properties of supercritical fluids, are generally flexible, more simplified and with a reduced enviromental impact. The result is that nanomaterials with potentially better performances have been obtained. We propose a critical review of the supercritical based techniques applied to the production of nanoparticles materials.Keywords: Supercritical fluids; Nanoparticles; SCF technology; RESS; SAS