Click to Download Data : An Event Study of Internet Access to Economic Statistics

This study examines the online access statistics of the Central Bank of Turkey's Electronic Data Delivery System within an event study framework. The comparisons of pre-event and post-event statistics suggest that announcements of both the policy interest rates and the consumer price data considerably affect society's data access behavior. The timing and amplitude of these effects are further studied with respect to inflation expectations and surprise content of events; yet no solid pattern was revealed.Data access, Macroeconomic data, Market efficiency, Event study

Click to download data: an event study of Internet access to economic statistics

This study examines the online access statistics of the Central Bank of Turkey’s Electronic Data Delivery System within an event study framework. The comparisons of pre-event and post-event statistics suggest that announcements of both the policy interest rates and the consumer price data considerably affect society’s data access behavior. The timing and amplitude of these effects are further studied with respect to inflation expectations and surprise content of events; yet no solid pattern was revealed.Data access; Macroeconomic data; Market efficiency; Event study

Minimally invasive double lung transplantation technique (Anteroaxillary approach)

Lung transplantation has been performed through several approaches in the past. Sternothoracotomy is the most widely used approach for double lung transplantation. Although bilateral anterolateral thoracotomy for double lung transplantation has been described in the past, this approach has not widely adopted worldwide. The 'anteroaxillary approach' utilizes a limited incision compared to others, preserves sternal anatomy as well as thoracic arteries, and provides an excellent exposure to hilum. We would like to present our standard approach at University of Pittsburgh through anteroaxillary incision

First quantized electron and photon model of QED and radiative processes

In this study we combine the classical models of the massive and massless spinning particles, derive the current-current interaction Lagrangian of the particles from the gauge transformations of the classical spinors, and discuss radiative processes in electrodynamics by using the solutions of the Dirac equation and the quantum wave equations of the photon. The longitudinal polarized photon states give a new idea about the vacuum concept in electrodynamics.Comment: LaTeX file, 20 pages, 7 figures. to appear in Canadian Journal of Physic

Expression of Plakophilins (PKP1, PKP2, and PKP3) in Gastric Cancers

BACKGROUND: The importance of cell-cell junction proteins (including armadillo proteins) in tumor biology is known, but limited with regard to plakophilins. We explored the relationship between plakophilins (PKP1, PKP2, PKP3) to gastric cancer via immunohistochemical techniques. METHODS: We compared the immunohistochemistry of PKPs in 34 gastric adenocarcinomas and 20 normal gastric tissues. RESULTS: In gastric cancer, PKP1 expression was unchanged but PKP2 and PKP3 were significantly decreased as compared to normal controls. There was no observable clinical association with PKP1 or PKP2 expression; however, low PKP3 level and poor prognosis appeared to correlate with regards to node number and tumor stage. The mean disease-free survival (DFS) was 38 ± 3 months (range: 32 - 44) and mean overall survival (OS) 42 ± 4 months (range: 38 - 50). Decreased PKP2 appeared to negatively impact DFS. CONCLUSION: Decreased PKP2 and PKP3 may be early prognostic markers and loss of PKP3 expression during gastric carcinoma progression may indicate an invasive phenotype

Recent Ferroalloy Studies at Istanbul Technical University

The present report is the summary of the experimental studies on the production of ferroalloys and iron-based alloys, which have been conducted in the laboratories of Macro to Nano Research Team (MtNT, Yücel’s Group) at Istanbul Technical University (ITU, Turkey) – Metallurgical and Materials Engineering Department in the last decade. Ferromolybdenum, ferrochromium, ferronickel, and iron-based alloys with alloying elements (Mo, Ni, Cr, etc.) were produced through different reduction processes (metallothermic and carbothermic) starting from different reactant materials such as mill scale, hematite, magnetite, NiO, Cr2O3, chromic acid, and MoO3. The effects of different stoichiometric amounts of reactants and reductant powders were investigated for the production of unalloyed Fe. While, different amounts of metal oxide ratios and their effects on metal recoveries, compositions, and microstructure of final alloys were studied during Fe-based alloys production, raw materials and produced alloys and slags were characterized by using chemical analysis methods (AAS, ICP), X-ray diffraction spectrometry (XRD), X-ray fluorescence spectrometry (XRF), and scanning electron microscopy (SEM/EDS) techniques. Keywords: iron-based alloys, carbothermic reduction, metallothermic reduction, İT

Click to download data: an event study of Internet access to economic statistics

This study examines the online access statistics of the Central Bank of Turkey’s Electronic Data Delivery System within an event study framework. The comparisons of pre-event and post-event statistics suggest that announcements of both the policy interest rates and the consumer price data considerably affect society’s data access behavior. The timing and amplitude of these effects are further studied with respect to inflation expectations and surprise content of events; yet no solid pattern was revealed