17 research outputs found
Pressacademia Procedia
No full textAs mobile devices such as smart phones and tablets have become important tools for communication and entertainment, especially among young generation, these mobile devices have also provided new opportunities for business and commerce. In this study, the use of mobile phones for shopping on the Internet among university students was investigated. The data of this study was collected with a survey instrument from participants of Business students at Bilecik Seyh Edebali University. Based on the analysis of 278 Business students' data, we found that smart phone ownership is very common (97%), students intensively use mobile phones (most of them use it at least 3 hours in a day) and it was found that 53% of the participants used their mobile phones to make purchases on the Internet. The majority of students who did not shop from the Internet using a mobile phone stated that the most important reason was the security risk
Inducing transitions and quantum transport in topological meta-materials
No full textIn this Thesis, we propose a novel method that changes the topological order in superconductor wires. We first consider the case of disorder in one dimensional topological superconductors and show how disorder can destroy or create topological order leading to reentrant topological phases. We then consider the effects of a superlattice potential, a zero-average piecewise continuous weak electrostatic potential, on p-wave and s-wave topological superconductor wires. We call such stacked wires leading to weak periodic potential modulation, meta-topological superconductor wires. Topological superconducting wires in their nontrivial phases exhibit Majorana modes as their edge states. We show that by stacking topologically trivial pieces of superconductors, it is possible to induce a topological phase which feature Majorana states at the edges of the superlattice: the meta-topological superconductor. The presence of an electrostatic superlattice allows us to control the topological phase space via the geometry of the electrostatic superlattice. We consider strictly one dimensional meta-topological superconductor wires as well as their quasi-one dimensional multichannel counterparts and show that reentrant topological phases in multichannel meta-topological superconductors occur. Finally, we consider the analogous case of a meta-topological insulator, a quantum anomalous Hall insulator featuring a weak superlattice of magnetic modulation, and show that the transmission can be topologically controlled as a function of energy. The topological protection leads to binary transmission (either transmit or reflect) through the meta-topological quantum anomalous Hall insulator, details of which can be controlled by tuning the properties of the weak superlattice
Open heart surgery in a patient with liver transplantation: A case report
No full textKaraciğer nakli olan hasta sayısı arttıkça, geç dönemde gelişen kalp ve diğer sistem patolojileri Damar Cerrahisi Kliniği, Florya, İstanbul, nedeniyle cerrahi uygulamaları da sıklaşmıştır. Karaciğer nakli olan hastalarda koroner arter hastalığının görülme oranı artmaktadır. Karaciğer transplantı hastaları, asemptomatik olsa bile, koroner arter hastalığı için yüksek risk alt grubudur. Karaciğer transplantı gerçekleştirilen bir Turkey. hastada koroner arter hastalığı gelişmesi, kötü bir prognostik faktördür; Bu nedenle, risk altındaki kişilerin belirlenmesi klinik önceliğe sahip olmalıdır. Bu çalışmamızda, on iki yıl önce karaciğer nakli uygulanan 68 yaşındaki bir erkek hastaya iskemik kalp hastalığı tanısı ile kardiopulmoner Çıkar Çatışması: Yazarlar çıkar çatışması.As the number of patients with liver transplantation increased, surgical applications were also frequent due to late-onset heart and other systemic pathologies. The incidence of coronary artery disease is increasing in patients with liver transplantation. Liver transplanted patients are a high risk subgroup for coronary artery disease, even if they are asymptomatic. Coronary artery disease is a predictor of poor outcomes in patients with liver transplantation; therefore, identiŞcation of those Sorumlu yazar / Corresponding author patients at risk for coronary artery disease should be a key clinical priority. In this study, it was Melike Elif Teker aimed to present coronary artery bypass grafting surgery in a 68-year-old male patient with previous ve Damar Cerrahisi Hastanesi, Eski Londra Asfaltı liver transplantation 12 years ago. Coronary artery bypass grafting operation was performed using left internal mammarian artery and autogenous vein graft for three vessels. There was no complication in the pre- and post-operative periods. Coronary artery bypass grafting operation can be performed safely for patients with previous liver transplantaion in experienced centers
Venture Capital Markets: A Cross Country Analysis
No full textAbstractVenture capital (VC) may be defined as a support to entrepreneurial talents and appetite by turning ideas and basic science into products and services which are expected to envy the world. Venture capital funds are able to build companies from the simplest form to mature organizations. Venture capital investors generally actively engage with management of the company by typically taking place on the board. Through the due diligence process the venture capital firms concentrate on the founders, the management team, the concept, the marketplace, the revenue model, the value-added potential of the firm, the amount of capital needed to heal the business and whether all these fit to the fund's objectives. Over the next three to eight years, the venture firm works with the founding entrepreneur/s to grow the company. Once a company funded by venture capital matures and becomes successful, venture funds generally exit by taking it public through an initial public offering (IPO) or by selling it to big companies. This allows the venture funds to be free from the previous investment and invest in the next generation of companies. United States, Europe, Israel, Canada, China and India have the most developed markets for venture capital environment. The size of the venture capital market is nowadays about 33.1 billion in 2013. Venture capital firms may invest in promising firms in stages of seed, first round, second round or later. The median investment amounts in the United States in 2013 are 2.5 million for first round, 10 for later stage. The most attractive sector for venture capital is information technology for the United States, Israel and Canada, invested over 4.8 billion in 2013
Whether Development Indices Affect Economic Growth: A Cross-Country Analysis
No full textAbstractThis study aims to examine the relationship between economic growth and highly featured development indices using a cross sectional data of 12 countries from both developed and developing world between the years 2000 and 2013. The indices of corruption, democracy, freedom of press, human development, global competitiveness, economic freedom, and the featured development indicators of World Bank such as average schooling years, life expectancy, female labour force participation rate, health expenditures rate in GDP, export rate of high technology, and employment rate are used to investigate the relationship in between economic growth and development indices. In order to exploit this relationship, all individual indices are reformed to produce form a single index, what we call harmonic index. The findings show that the higher scores of harmonic Index are associated with higher GDP per capita all levels except Saudi Arabia
G20: On Behalf of the Rest?
No full textAbstractMajor developments in the last three decades have set the scene for the rise of novel problems on global scale. The unprecedented level of interdependence and interconnectedness between countries, firms and institutions has paved the way for the emergence of, both, novel practices that increase the quality of life and intriguingly complicated issues of global governance. The relationship between global actors are so intertwined that striving for predictability is barely feasible. In spite of the enhanced capabilities gained through involvement in the economic and financial value creation process, there are perils ahead for better global governance. Major issues pose global actors in terms of credibility, building and ensuring sustainability, erosion of capacity to fulfill promises and increasing fragility of financial markets as well as issues regarding depleting energy resources, environment and security. G-20 emerged as a remedial governance structure in the wake of the 2008 financial turmoil making sure that the prominent dynamic emerging countries are seated around the table. The expansion of G-8 into G-20 including the new global powerhouses has many positive implications. However, ongoing debates regarding this structure oscillate between hope and contestation. This conceptual paper intends to draw a general framework regarding the representative capability of G-20 members and discuss the hybrid quality of this so called steering committee given the era of turbulence that the world is heading towards
Effects of electron scattering on the topological properties of nanowires: Majorana fermions from disorder and superlattices
No full textWe focus on inducing a topological state from regular or irregular scattering in (i) p-wave superconducting wires and (ii) Rashba wires proximity coupled to an s-wave superconductor. We find that, contrary to common expectations, the topological properties of both systems are fundamentally different: In p-wave wires, disorder generally has a detrimental effect on the topological order, and the topological state is destroyed beyond a critical disorder strength. In contrast, in Rashba wires, which are relevant for recent experiments, disorder can induce topological order, reducing the need for quasiballistic samples to obtain Majorana fermions. Moreover, we find that the total phase space area of the topological state is conserved for long disordered Rashba wires and can even be increased in an appropriately engineered superlattice potential
