Time-Frequency Warped Waveforms

The forthcoming communication systems are advancing towards improved flexibility in various aspects. Improved flexibility is crucial to cater diverse service requirements. This letter proposes a novel waveform design scheme that exploits axis warping to enable peaceful coexistence of different pulse shapes. A warping transform manipulates the lattice samples non-uniformly and provides flexibility to handle the time-frequency occupancy of a signal. The proposed approach enables the utilization of flexible pulse shapes in a quasi-orthogonal manner and increases the spectral efficiency. In addition, the rectangular resource block structure, which assists an efficient resource allocation, is preserved with the warped waveform design as well.Comment: 4 pages, 5 figures; accepted version (The URL for the final version: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8540914&isnumber=8605392

Global Imbalances, Current Account Rebalancing and Exchange Rate Adjustments

We analyze the global imbalances and the required adjustments for rebalancing in current accounts and real exchange rates. We set up a two-country two-sector model for the US- China with two asymmetries. First, we assume that the size of China initially is one third of the US but its size becomes half of the US in the next ten years consistent with the fast growth expectations in China. Secondly, we assume that China initially runs a net export surplus against the US. Then we quantitatively study two adjustment scenarios. First scenario,called Slow Adjustment, assumes that in the process of growth, Chinese demand composition moves more towards domestic non-tradable sector. In this case, Chinese real exchange rate appreciates gradually and net export surplus also decreases slowly. Second scenario, called Quick Adjustment, assumes that in addition to the higher non-tradable share in output, net export surplus against US goes to zero quickly in fi�ve years. In this case, net export adjustment happens quickly and real exchange rates in China also appreciate faster and at a higher rate than Slow Adjustment case. Even though, global imbalances are eliminated faste in the Quick Adjustment case, high real appreciation in China hurts importers in the US. A comparison in terms of output shows that Slow Adjustments is preferred for both countries.Global imbalances, Current accounts, Exchange rate adjustments

Waveform Design for 5G and Beyond

5G is envisioned to improve major key performance indicators (KPIs), such as peak data rate, spectral efficiency, power consumption, complexity, connection density, latency, and mobility. This chapter aims to provide a complete picture of the ongoing 5G waveform discussions and overviews the major candidates. It provides a brief description of the waveform and reveals the 5G use cases and waveform design requirements. The chapter presents the main features of cyclic prefix-orthogonal frequency-division multiplexing (CP-OFDM) that is deployed in 4G LTE systems. CP-OFDM is the baseline of the 5G waveform discussions since the performance of a new waveform is usually compared with it. The chapter examines the essential characteristics of the major waveform candidates along with the related advantages and disadvantages. It summarizes and compares the key features of different waveforms.Comment: 22 pages, 21 figures, 2 tables; accepted version (The URL for the final version: https://onlinelibrary.wiley.com/doi/abs/10.1002/9781119333142.ch2

BANKA KREDILERI VE ENFLASYON ARASINDAKI ILISKI: TURKIYE UZERINE EKONOMETRIK BIR ANALIZ (1983-2007)

In this study, one of the most controversial debates of economics literature, namely the relationship between bank credits and inflation is studied in the context of Turkish economy. In the study, covering 1983-2007 period, total bank credits and inflation (PPI) are used. The relationships between bank credits and inflation rate are analyzed econometrically by employing Johansen cointegration analysis and error correction model. According to the results, bank credits is negatively effected by inflation, while inflation is positively effected by bank credits in the long run. Furthermore, error correction-augmented Granger causality tests show that bi-directional causality exists between bank credits and inflation.Bank Credits, Inflation, Turkey Economy, Time Series, Unit Root, Cointegration, Weak Exogenity, Granger Causality, VEC Model

Students’ opinions about teaching of the controversial topics in the social studies classes

The aim of this study is to determine middle school 7th grade students’ opinions on controversial issues. In the research, screening model and quantitative research method has been used. The sample of the study consists of 7th graders from 5 public schools located on the center of Demirci district of Manisa province. The 5-point Likert-type questionnaire prepared with 20 items has been applied to 203 students. The data has been put into the statistical program and analyzed. By determining means, deviations and frequencies of all items in the survey, it has been tabulated and interpreted separately. “Mann Whitney U” and Kruskal Wallis H” tests have been used to find out whether the students' opinions about which subjects can be discussed in the classroom, shows significant difference according to various variables or not. Interpretation of the results has been done by the significance level of 0,5. According to the findings of the research, the topics that the students want to discuss the most in the classroom respectively are human rights, multiculturalism, election system, animal rights and freedom of the press. The topics that the students do not want to discuss in the classroom are terror and violence. When the results of the research has been examined according to various variables; Significant differences has been seen in different items, such as; The Gender (Military System, Religious Communities, Fanaticism and Cloning), Reading Books (TV Broadcasts), The Education of Father (Religious Communities, Multiculturalism), The Education of Mother (Military System, Religious Communities and Cloning), Father’s Profession (Religious Communities, Fanaticism, Internet and Elections System), Mother's Profession (Religious Communities) and Family Income Status (Internet)

E-COMMERCE AND ITS CONCEPTION BY GAZIANTEP INDUSTRY

21. century is called as Knowledge and Communication Age. In this age, countries develop some policies about electronic structuring which enable them to be a knowledge society. Given these developments states start to cast their classical bureaucratic structure and tend to work ‘E-Commerce’ structure which is easier, speeder and cheaper. So, the nature of local enterprises started to modify. The main aim of E-Commerce activities is to satisfy consumer needs. Thus, the private sector has a chance and obligation to provide some important subsets of e-commerce activities to the consumer. The main aim of this study is to show that how industrial undertaking use knowledge and communication technologies to provide expansion in Gaziantep industries. Survey data was analyzed using SPSS (Statical Package for Social Sciences) 13.0 statistics program in order to reach at this aim

A computer aided method for diagnose of the heart mitral valve diseases

In this paper, a new computer aided diagnosis system is presented for interpretation of the Doppler signals of the heart mitral valve diseases based on the pattern recognition. This paper especially deals with the feature extraction from measured Doppler signal waveforms at the heart mitral valve using the Doppler Ultrasound. Wavelet packet transforms and power spectrum estimate using Yule-Walker AR method are used to feature extract from the Doppler signals on the time-frequency domain. Wavelet entropy method is applied to these features. The backpropagation neural network is used to classify the extracted features. The performance of the developed system has been evaluated in 105 samples that contain 39 normal and 66 abnormal subjects. The results showed that this system was effective to detect Doppler heart sounds. The correct classification was about 99% for both normal and abnormal subjects

BASEL KRİTERLERİVE TÜRK BANKACILIK SEKTÖRÜNE ETKİLERİ

Bankacılık ve finans sektörünün sınır tanımaz bir şekilde büyümesi ve küreselleşmesi üzerine bu sektörün belirli standartlara uygun olarak çalışmasıyönünde faaliyetlere girilmiştir. Bunun sonucunda Basel-1 ve Basel-2 kriterleri oluşturulmuşve birçok ülke tarafından benimsenmiştir. Türkiye de, Basel-2 kriterlerini 2009 yılından itibaren uygulamayıkabul eden ülkelerden biridir. Basel-2 kriterleri özellikle bankaların kredi verme şartlarınıağırlaştırmakta ve teminat konusunda işletmelere ağır şartlar getirmektedir. Bu şartlarıyerine getiren işletmeler daha kolay ve daha düşük faizle kredi bulabileceklerdir. Şartlarıyerine getirmekte zorlanan işletmeler ise krediyi daha çok teminat vermek suretiyle ve doğal olarak daha yüksek faizle alabileceklerdir. Kriterlerin uygulamasının yaklaşmasısebebiyle bankaların ve işletmelerin kendilerini buna hazırlamasıgerekmektedir. Ülkemiz açısından bankaların kendilerini Basel-2 kriterlerine hazırlamaya başladıklarıgörülmektedir. Ancak aynı şeyi işletmeler açısından söylemek mümkün değildir

Trend in global trade and ıts ımpacts on labor

Globalization is one of the defining features of the contemporary world, but there is considerable controversy regarding its nature, impact, and future trends. Globalization has resulted in rapidly growing international flows of import and export goods, capital and direct invenstments. The services sector nowadays has expanded in scope beyond thetraditional activities in finance, transport, travel and telecommunication and audio-visual services to a host of professional services such as software and information services, engineering and legal services, e-commerce and other internet-based service offerings. After post second world war period, this growth of services have shown a dramatic increase in most of the developed countries of the world. Improving information and communicating technologies (ICT) intensified international interaction, increased competition and volume of global trade, while creating new challenges for labor. The purpose of his study is to show the dynamics of globalisation and its effects on international trade and labor force, providing some policy outcomes for he world in general, and Turkey.Küreselleşme günümüz dünyasının açıklayıcı özelliklerinden birini oluşturmaktadır ama yinede küreselleşmenin yapısı, etkileri ve gelecek trendleri üzerine önemli tartışmalar yaşanmaktadır. Küreselleşme uluslararası ithalat ve ihracat ürünlerinin, paranın ve doğrudan yatırımların uluslararası hareketinin gelişmesi sonucunda oluşmuştur. Hizmet sektörü günümüzde uluslararası bir çok alanda özellikle finans, ulaşım, seyahat ve teleküminasyon ve e-hizmet, e-ticaret ve bilgi topluma dayalı geniş bir uygulama faaliyetleri kapsamaktadır. Özellikle ikinci dünya savaşından sonra gelişmiş ülkelerin bir çoğunda büyük bir artış hızı göstermektedir. Bilgi ve iletişim teknolojilerinin(ICT) gelişmesi, uluslararası etkileşimin şiddetini arttırmakta bu da işçilik için yeni tehditler oluştururken rekabet ve küresel ticaret oranlarını arttırmaktadır. Bu çalışmanın amacı küreselleşmenin dinamiklerini ve küreselleşmenin uluslararası ticaret ve işgücü üzerindeki etkisini dünya genelinde ve Türkiye’deki çeşitli politikalar neticesinde göstermekti