Investigation of the relationship between technology addiction and sleepiness among university students in health-related departments in Turkey

Abstract Objective: To investigate the relationship of internet and smartphone addiction levels of university students in health-related departments with their daily sleepiness, and to identify associated factors. ---Continu

Syngas cleaning for coal to methanol demo plant - H2S and COS removal

Syngas cleaning, especially the removal of COS and H2S, is a crucial step in the production of valuable chemicals from coal. As a part of the Tuncbilek Coal to Methanol project, a gas cleaning demo plant has been built. The aim of this paper is to disseminate the experience gained from these demo plant experiments concerning the performance of the gasifier and syngas cleaning demo-plant, especially about the removal of sulfur compounds. Additionally, some practical recommendations regarding the design and operation of such demo plants are given. The design-basis for the demo plant was a gas stream of 450 m(3)/h (at STP) containing 4,000 ppmv H2S and 2,000 ppmv COS. The performance target was to reduce H2S and COS concentrations to less than one ppmv each. The gas cleaning process consisted of a particulate filter, COS hydrolysis reactors, caustic scrubbers, H2S guard beds and heat exchangers. Two demo plant runs were conducted, and Tuncbilek lignite was gasified in the 6 ton/day (coal feeding capacity) entrained flow gasifier. The gasifier produced syngases with lower heating values of 7.64 and 8.86 MJ/m(3) (at STP), and cold gas efficiencies of 71 and 81% were achieved. The H2S and COS content of the successful run were 3,300 ppmv and 550 ppmv, respectively. At the exit of the gas cleaning demo plant, a concentration of 0.12 ppmv for H2S and 0.72 ppmv for COS were measured. Consequently, it was concluded that the performance of the gas cleaning demo plant was satisfactory for methanol production

Co-firing of pine chips with Turkish lignites in 750 kWth circulating fluidized bed combustion system

WOS: 000395691900072PubMed ID: 27825549Two Turkish lignites which have different sulfur levels (2-2.9% dry) and ash levels (17-25% dry) were combusted with a Turkish forest red pine chips in a 750 kW-thermal capacity circulating fluidized bed combustor (CFBC) system. The combustion temperature was held at 850 +/- 50 degrees C. Flue gas emissions were measured by Gasmet DX-4000 flue gas analyzer. Two lignites were combusted alone, and then limestone was added to lignites to reduce SO2 emissions. Ca/S = 3 was used. 30% percent of red pine chips were added to the lignites for co-firing experiments without limestone in order to see the biomass effects. The results showed that with limestone addition SO2 concentration was reduced below the limit values for all lignites. CO emissions are high at low excess air ratios, gets lower as the excess air ratio increases. During co-firing experiments the temperature in the freeboard was 100-150 degrees C higher as compared to coal combustion experiments. (C) 2016 Elsevier Ltd. All rights reserved.TUBITAK-KAMAGTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [105G023]The financial support for this project by TUBITAK-KAMAG (Project Code: 105G023) is greatly appreciated. The views expressed in this paper belong to authors

Abusive Head Trauma in Turkey and Impact of Multidisciplinary Team Establishment Efforts on Case Finding and Management: Preliminary Findings

Aim: Abusive head trauma (AHT) is the most common cause of death as the result of child abuse. A task force is planned to provide training on AHT to professionals in different disciplines on clinical presentation, diagnostic workup, and organization of multidisciplinary evaluation at the hospital and community levels. This study reports on the preliminary findings of the pre-intervention phase of a larger study

Abusive Head Trauma in Turkey and Impact of Multidisciplinary Team Establishment Efforts on Case Finding and Management: Preliminary Findings

Aim: Abusive head trauma (AHT) is the most common cause of death as the result of child abuse. A task force is planned to provide training on AHT to professionals in different disciplines on clinical presentation, diagnostic workup, and organization of multidisciplinary evaluation at the hospital and community levels. This study reports on the preliminary findings of the pre-intervention phase of a larger study