Molecular Dynamics Computer Simulation of Crystal Growth and Melting in Al50Ni50

The melting and crystallization of Al50Ni50} are studied by means of molecular dynamics computer simulations, using a potential of the embedded atom type to model the interactions between the particles. Systems in a slab geometry are simulated where the B2 phase of AlNi in the middle of an elongated simulation box is separated by two planar interfaces from the liquid phase, thereby considering the (100) crystal orientation. By determining the temperature dependence of the interface velocity, an accurate estimate of the melting temperature is provided. The value k=0.0025 m/s/K for the kinetic growth coefficient is found. This value is about two orders of magnitude smaller than that found in recent simulation studies of one-component metals. The classical Wilson-Frenkel model is not able to describe the crystal growth kinetics on a quantitative level. We argue that this is due to the neglect of diffusion processes in the liquid-crystal interface.Comment: 6 pages, 6 figure

Self-synchronization of Kerr-nonlinear Optical Parametric Oscillators

We introduce a new, reduced nonlinear oscillator model governing the spontaneous creation of sharp pulses in a damped, driven, cubic nonlinear Schroedinger equation. The reduced model embodies the fundamental connection between mode synchronization and spatiotemporal pulse formation. We identify attracting solutions corresponding to stable cavity solitons and Turing patterns. Viewed in the optical context, our results explain the recently reported $\pi$ and $\pi/2$ steps in the phase spectrum of microresonator-based optical frequency combs

Self-synchronization Phenomena in the Lugiato-Lefever Equation

The damped driven nonlinear Schr\"odinger equation (NLSE) has been used to understand a range of physical phenomena in diverse systems. Studying this equation in the context of optical hyper-parametric oscillators in anomalous-dispersion dissipative cavities, where NLSE is usually referred to as the Lugiato-Lefever equation (LLE), we are led to a new, reduced nonlinear oscillator model which uncovers the essence of the spontaneous creation of sharply peaked pulses in optical resonators. We identify attracting solutions for this model which correspond to stable cavity solitons and Turing patterns, and study their degree of stability. The reduced model embodies the fundamental connection between mode synchronization and spatiotemporal pattern formation, and represents a novel class of self-synchronization processes in which coupling between nonlinear oscillators is governed by energy and momentum conservation.Comment: This manuscript is published in Physical Review A. Copyright 2017 by the American Physical Society. arXiv admin note: text overlap with arXiv:1602.0852

A Holistic Investigation on Terahertz Propagation and Channel Modeling Toward Vertical Heterogeneous Networks

User-centric and low latency communications can be enabled not only by small cells but also through ubiquitous connectivity. Recently, the vertical heterogeneous network (V-HetNet) architecture is proposed to backhaul/fronthaul a large number of small cells. Like an orchestra, the V-HetNet is a polyphony of different communication ensembles, including geostationary orbit (GEO), and low-earth orbit (LEO) satellites (e.g., CubeSats), and networked flying platforms (NFPs) along with terrestrial communication links. In this study, we propose the Terahertz (THz) communications to enable the elements of V-HetNets to function in harmony. As THz links offer a large bandwidth, leading to ultra-high data rates, it is suitable for backhauling and fronthauling small cells. Furthermore, THz communications can support numerous applications from inter-satellite links to in-vivo nanonetworks. However, to savor this harmony, we need accurate channel models. In this paper, the insights obtained through our measurement campaigns are highlighted, to reveal the true potential of THz communications in V-HetNets.Comment: It has been accepted for the publication in IEEE Communications Magazin

Maliyet liderliği stratejisi, toplam kalite yönetimi uygulamaları ve finansal performans ilişkisi

Firms need to implement some competition strategies and total quality management applications to overcome the fierce competition among others. The purpose of this study is to show the relationship between cost leadership strategy, total quality management applications and firms’ financial performance with literature review and empirical analysis. 449 questionnaires were conducted to the managers of 142 big firms. The data gathered was assessed with AMOS. As a result, the relationship between cost leadership strategy, total quality management applications and firms’ financial performance has been gathered. In addition, the relationship between TQM applications and financial performance has also been gathered.İşletmeler rekabetin üstesinden gelebilmek için bazı rekabet stratejileri ve toplam kalite yönetimi prensiplerini uygulama gereği duyarlar. Bu çalışmanın amacı maliyet liderliği stratejisi, toplam kalite yönetimi uygulamaları ve finansal perfromans arasındaki ilişkiyi literatür çalışması ve ampirik analizle göstermektir. 142 büyük işletmenin 449 yöneticisine anket uygulandı. Toplanan bilgi AMOS ile değerlendirildi. Sonuç olarak, maliyet liderliği stratejisi, toplam kalite yönetimi uygulamaları ve finansal performans arasındaki ilişki ortaya kondu. Bununla birlikte TKY uygulamaları ve finansal performans arasındaki ilişki de değerlendirildi

The Relationship between Cost Leadership Strategy, Total Quality Management Applications and Financial Performance

İşletmeler rekabetin üstesinden gelebilmek için bazı rekabet stratejileri ve toplam kalite yönetimi prensiplerini uygulama gereği duyarlar. Bu çalışmanın amacı maliyet liderliği stratejisi, toplam kalite yönetimi uygulamaları ve finansal perfromans arasındaki ilişkiyi literatür çalışması ve ampirik analizle göstermektir. 142 büyük işletmenin 449 yöneticisine anket uygulandı. Toplanan bilgi AMOS ile değerlendirildi. Sonuç olarak, maliyet liderliği stratejisi, toplam kalite yönetimi uygulamaları ve finansal performans arasındaki ilişki ortaya kondu. Bununla birlikte TKY uygulamaları ve finansal performans arasındaki ilişki de değerlendirildi.Firms need to implement some competition strategies and total quality management applications to overcome the fierce competition among others. The purpose of this study is to show the relationship between cost leadership strategy, total quality management applications and firms’ financial performance with literature review and empirical analysis. 449 questionnaires were conducted to the managers of 142 big firms. The data gathered was assessed with AMOS. As a result, the relationship between cost leadership strategy, total quality management applications and firms’ financial performance has been gathered. In addition, the relationship between TQM applications and financial performance has also been gathered

The Moderator Role of Psychological Capital Between Perceived Organizational Support and Work-Family Balance: A Service Sector Research

Studies on work-family conflict and balance are carried out in management/organization literature and these studies mostly focus on work-family conflict. It is thought that studying work-family relationship with a view of positive psychology and focusing the balance concept rather than conflict will result more positively. In studies conducted so far, it has been shown that there are meaningful effects of organizational support on work-family balance. However, although they are working in the same organization, taking the presence of people at odds with balancing between work and family into account, it is apparent that there are some personal factors inside. The studies in the literature tries to explain this problem with mostly general discrepancies in personalities such as age and gender and they seldom focus on psychological and cognitive background. The aim of this study is to search how the psychological capital of people play a role between perceived organizational support and work-family balance and to emphasize the psychological and cognitive background which was overlooked by other studies. Research hypotheses have been tested by SPSS and AMOS with the data gathered by field research and thus, it has been observed that psychological capital of people play a moderator role in the relationship between work and family balance with the support of organization and manager

Decreased mean platelet volume and increased platelet to lymphocyte ratio in patients with pterygium

Pterygium is a common disorder of the ocular surface characterized by collagen degeneration and overgrowth of fibrovascular tissue from the conjunctivae onto the cornea(1). The Neutrophil to lymphocyte ratio (NLR), monocyte to lymphocyte ratio (MLR), platelet to lymphocyte ratio (PLR) and mean platelet volume (MPV) have all been explored as potential biomarkers for inflammation associated with ophthalmic diseases.In this study, we evaluated MPV, NLR, MLR and PLR and identified specific associations with the pathogenesis of pterygium

The Relationship between Cost Leadership Strategy, Total Quality Management Applications and Financial Performance

İşletmeler rekabetin üstesinden gelebilmek için bazı rekabet stratejileri ve toplam kalite yönetimi prensiplerini uygulama gereği duyarlar. Bu çalışmanın amacı maliyet liderliği stratejisi, toplam kalite yönetimi uygulamaları ve finansal perfromans arasındaki ilişkiyi literatür çalışması ve ampirik analizle göstermektir. 142 büyük işletmenin 449 yöneticisine anket uygulandı. Toplanan bilgi AMOS ile değerlendirildi. Sonuç olarak, maliyet liderliği stratejisi, toplam kalite yönetimi uygulamaları ve finansal performans arasındaki ilişki ortaya kondu. Bununla birlikte TKY uygulamaları ve finansal performans arasındaki ilişki de değerlendirildi.Firms need to implement some competition strategies and total quality management applications to overcome the fierce competition among others. The purpose of this study is to show the relationship between cost leadership strategy, total quality management applications and firms’ financial performance with literature review and empirical analysis. 449 questionnaires were conducted to the managers of 142 big firms. The data gathered was assessed with AMOS. As a result, the relationship between cost leadership strategy, total quality management applications and firms’ financial performance has been gathered. In addition, the relationship between TQM applications and financial performance has also been gathered