Ahi Evran University

About: Ahi Evran University is a education organization based out in Kırşehir, Turkey. It is known for research contribution in the topics: Density functional theory & Ab initio. The organization has 842 authors who have published 2270 publications receiving 21904 citations.

The resilience of green firms in the twirl of COVID-19: Evidence from S&P500 Carbon Efficiency Index with a Fourier approach.

Abstract: This paper investigates the resilience of environmentally friendly companies in an overwhelming economic and social environment that has been generated after the outbreak of the novel coronavirus disease (COVID-19) pandemic. To this respect, we have investigated the cointegration between the Standard & Poor's (S&P) 500 Carbon Efficiency Index (CEI) with COVID-19 cases, supplemented with covariates such as government response stringency to the pandemic, economic policy uncertainty, oil prices and global markets fluctuations. We have used daily data from 2nd January to 5th October 2020 and have employed a robust estimator within a Fourier approach to accommodate both sharp and smooth breaks. Our results suggest that green companies have been positively affected by the outbreak of COVID-19. Our paper provides practical implications for companies that wish to furnish themselves with resilience during rough times and stakeholders who wish to invest in safe, long-lasting returns.

Automation Software for Semiconductor Research Laboratories: Measurement System and Instrument Control Program (SeCLaS-IC)

Abstract: Metal–semiconductor (MS) contacts are main aspects of almost all electronic circuit elements. Thus, contact mechanism and its electrical properties to develop a faster and more reliable electronic device should be known. The electrical characterization of MS devices (in terms of temperature-dependent and/or independent current–voltage (I–V), capacitance–voltage (C–V) and capacitance–frequency (C–f) measurements) is applied frequently in methods for determining the electrical properties and how it works and what the possible applications are. We prepared a program for basic electrical measurements and parameter extraction from these measurements of MS contacts. It is important to prepare and use such a program for a research laboratory, because electrical measurements must be made quickly after the production process and users should be able to carry out this process easily. This work can be discussed in two separate sections. The first section consists of a measurement system, automated instrument control program and data acquisition program (SeCLaS-IC Semiconductors Laboratory Software—instrument control). The second section is data evaluation and basic electrical parameter extraction program (SeCLaS-PC Semiconductors Laboratory Software—parameter calculation). In this paper, we discussed temperature-dependent current–voltage (I–V–T), capacitance–voltage (C–V–T) and capacitance–frequency (C–V–f) measurement system and instrument control program. This system is comprised of controlling program, liquid nitrogen (LN2)-cooled handmade cryostat system, temperature measurement system, and Keysight B2912A Precision Source/Measure Unit (SMU) and Keysight E4980A Precision LCR Meter. All programs were developed using Keysight VEE Pro (Visual Engineering Environment) software (Formerly Agilent VEE Pro).

Effects of different segmental spinal stabilization exercise protocols on postural stability in asymptomatic subjects: randomized controlled trial.

Abstract: Background and objectives: The aim was to assess and compare the postural stability effects of the "Progressive Dynamic Spine Stabilization Exercise Protocols" (PDSSEP) which were designed for different spinal segments. Material and Method: The asymptomatic, sedentary, and female volunteers (21.26 ± 1.30 years old) were allocated randomly into Cervical (n = 22), Lumbar (n = 21), Thoracic (n = 20), Combined (n = 20), and Control (n = 21) Groups. All training groups participated into the related PDSSEP for six weeks, 3 days/week. The assessments were carried out at the baseline, after 6 th week, and on the 12 th week. "Tetrax Interactive Posturography and Balance System" (Tetrax System, Ramat Gan, Israel) was used to assess the overall postural stability (SI), weight distribution (WDI) and somatosensory reactions. "Kruskal Wallis Test" for the differences of the pre-6 th weeks, pre-12 th weeks within the groups, "Mann-Whitney U Test" for control and inter-group comparisons were used. Results: The differences were observed for eyes closed SI, and WDI in head right rotated position ( p< 0.05) between the baseline and after completing the programs. Eyes closed SI in solid surface was shown statistically different in Thoracic group in comparison to controls ( p< 0.02). SI on soft surface, SI head left rotated position and somatosensory reactions with head flexed position improved in Thoracic Group at the 12 th week ( p< 0.01). WDI significantly improved in Cervical Group ( p< 0.01). Conclusion: Thoracic spine can be considered as a hidden source for improving overall postural stability. It may be appropriate to focus on thoracic region in the kinetic chain for the treatment or training. Level of evidence: A prospective randomized controlled trial, Level 1.

Bloodstream infection with Oligella ureolytica in a newborn infant: a case report and review of the literature

Abstract: Oligella species are small, Gram-negative, nonsaccharolytic aerobic rods or coccobacilli that are catalase and oxidase-positive, mostly isolated from the urinary tract and rarely from wounds, bloodstream infections, septic arthritis, or peritonitis.In this article, we report a case of O.ureolytica-related bloodstream infection in a newborn infant and we review the literature for previously reported cases of Oligella infections.