İş güvencesi endeksi ve iş güvencesi memnuniyeti ölçeği: güvenirlik ve geçerlik analizi

İş güvencesi konusu şirketlerin yeniden yapılanma çabalarının yoğunlaştığı, çalışma süreçlerinde ve iş gücü piyasasında önemli değişikliklerin gerçekleştiği son yirmi yıl boyunca artan bir ilgi görmüştür. Bu dönemde araştırmacılar iş güvencesi kavramının geliştirilmesi ve bu kavramın ölçülmesi için gerekli araçların yaratılması üzerinde yoğunlaşmıştır. Bu çalışmada Probst’un (1998) geliştirdiği iki ölçeğin (İş Güvencesi Endeksi ve İş Güvencesi Memnuniyeti ölçeği) güvenirlik ve geçerlik analizi sunulmaktadır. Çalışmanın bulguları bu ölçeklerin Türkçe’de güvenirlik ve geçerliklerini desteklemektedir. Özellikle yakın dönemdeki mali kriz nedeniyle işten çıkarmaların yoğunlaştığı Türkiye’de iş güvencesi çalışmaları önem kazanmıştır. Geçerlik ve güvenirliğe sahip olduğu gösterilen, kısa ve anlaşılır olan İş Güvencesi Endeksi ve İş Güvencesi Memnuniyeti ölçeği bu çalışmalara katkıda bulunabilecektir

Kültürlerarası çalışmalarda yöntem: örgütsel bağlılık yazınından dersler

Bu makalede 1991-2001 yılları arasında yayınlanmış görgül kültürlerarası örgütsel bağlılık çalışmalarındaki yöntemsel uygulamalar niteliksel olarak derinlemesine değerlendirilmektedir. Özellikle, kültürel açıklamaların geçerliliğini tehdit eden örnekleme, araçlama ve veri toplamaya ilişkin hususlar incelenmektedir. İnceleme, Sosyal Bilimler Atıf Endeksi’nde (Social Sciences Citation Index, SSCI) sosyal psikoloji, uygulamalı psikoloji, yönetim ve çalışma ilişkileri başlıkları altında listelenen İngilizce dergilerde tespit edilen altı makale ile yapılmıştır. Bulgular, değerlendirmeye tabi tutulan araştırmaların kültürel kuramları önsel olarak temel almakla beraber Kuzey Amerika kökenli kuramların evrenselliğini sınayan çalışmalar olduğunu göstermektedir. Ayrıca, zamanla bir miktar iyileşme görülmekle birlikte, çalışmaların örnekleme, araçlama ve veri toplama uygulamaları açısından eksikliklerinin olduğu görülmüştür

End to End Deep Neural Network Frequency Demodulation of Speech Signals

Frequency modulation (FM) is a form of radio broadcasting which is widely used nowadays and has been for almost a century. We suggest a software-defined-radio (SDR) receiver for FM demodulation that adopts an end-to-end learning based approach and utilizes the prior information of transmitted speech message in the demodulation process. The receiver detects and enhances speech from the in-phase and quadrature components of its base band version. The new system yields high performance detection for both acoustical disturbances, and communication channel noise and is foreseen to out-perform the established methods for low signal to noise ratio (SNR) conditions in both mean square error and in perceptual evaluation of speech quality score

Foreign banks, financial crises and macroeconomic fluctuations

Understanding the implications of increased foreign bank presence is especially compelling in periods of financial crisis. In this paper, we explore this issue by examining the relationship between the involvement of foreign banks in the banking systems and the volatility of key macroeconomic variables in normal and crisis periods. Using a sample of 20 Emerging European countries from 1998 to 2013, we find that an increase in the assets of foreign banks in the banking system reduces output and consumption growth volatility in general but does not significantly affect the volatility of investments. However, these banks were found to play a significant role in increasing output, consumption and investment volatility in 2009. Our findings suggest that foreign banks’ harmful impact during the global crisis was only temporary and that they seem to help Emerging European countries stabilize macroeconomic volatility in normal times and after the global crisis. © 2016 The Authors Economics of Transition © 2016 The European Bank for Reconstruction and Development Published by Blackwell Publishing Lt

Quaternionic Salkowski Curves and Quaternionic Similar Curves

In this paper, we give the definitions and characterizations of quaternionic Salkowski, quaternionic anti-Salkowski and quaternionic similar curves in the Euclidean spaces E^3 and E^4. We obtain relationships between these curves and some special quaternionic curves such as quaternionic slant helices and quaternionic B2-slant helices.Comment: 17 page

On Signature Transition and Compactification in Kaluza-Klein Cosmology

We consider an empty (4+1) dimensional Kaluza-Klein universe with a negative cosmological constant and a Robertson-Walker type metric. It is shown that the solutions to Einstein field equations have degenerate metric and exhibit transitioins from a Euclidean to a Lorentzian domain. We then suggest a mechanism, based on signature transition which leads to compactification of the internal space in the Lorentzian region as $a \sim |\Lambda|^{1/2}$. With the assumption of a very small value for the cosmological constant we find that the size of the universe $R$ and the internal scale factor $a$ would be related according to $Ra\sim 1$ in the Lorentzian region. The corresponding Wheeler-DeWitt equation has exact solution in the mini-superspace giving rise to a quantum state which peaks in the vicinity of the classical solutions undergoing signature transition.Comment: 13 pages, 3 figure

Diffeomorphism algebra of two dimensional free massless scalar field with signature change

We study a model of free massless scalar fields on a two dimensional cylinder with metric that admits a change of signature between Lorentzian and Euclidean type (ET), across the two timelike hypersurfaces (with respect to Lorentzian region). Considering a long strip-shaped region of the cylinder, denoted by an angle \theta, as the signature changed region it is shown that the energy spectrum depends on the angle \theta and in a sense differs from ordinary one for low energies. Morever diffeomorphism algebra of corresponding infinite conserved charges is different from '' Virasoro'' algebra and approaches to it at higher energies. The central term is also modified but does not approach to the ordinary one at higher energies.Comment: 18 pages, Latex, 2 ps figure

Dynamical Generation of Spacetime Signature by Massive Quantum Fields on a Topologically Non-Trivial Background

The effective potential for a dynamical Wick field (dynamical signature) induced by the quantum effects of massive fields on a topologically non-trivial $D$ dimensional background is considered. It is shown that when the radius of the compactified dimension is very small compared with $\Lambda^{1/2}$ (where $\Lambda$ is a proper-time cutoff), a flat metric with Lorentzian signature is preferred on ${\bf R}^4 \times {\bf S}^1$. When the compactification radius becomes larger a careful analysis of the 1-loop effective potential indicates that a Lorentzian signature is preferred in both $D=6$ and $D=4$ and that these results are relatively stable under metrical perturbations