An Automated System for Strain Engineering and Straintronics of 2D Materials

This work presents an automated three-point bending apparatus that can be used to study strain engineering and straintronics in 2D materials. This work benchmarks the system by reporting reproducible strain tuned micro-reflectance, Raman, and photoluminescence spectra for monolayer molybdenum disulfide (MoS2). These results are in good agreement with reported literature using conventional bending apparatus. This work further utilizes the system to automate strain investigations of straintronic devices by measuring the piezoresistive effect and the strain effect on photoresponse in an MoS2 electrical device. The details of the construction of the straightforward system are given and it is anticipated that it can be easily implemented for study of strain engineering and straintronics in a wide variety of 2D material systems

The role of Tadalafil in the treatment of benign prostatic hyperplasia and erectile dysfunction

The aim of this study is to investigate the effectiveness of a single 5 mg daily dose of Tadalafil in patients with lower urinary tract symptoms (LUTS) due to benign prostatic hyperplasia (BPH) accompanied by erectile dysfunction (ED). The data of patients who applied to the urology outpatient clinic between 2014 and 2019 and were diagnosed with BPH and ED were retrospectively analysed. Before and after the treatment with 5 mg tadalafil daily for 12 weeks; maximum flow rate (Qmax), average flow rate (Qave), postvoid residual volume (PVR), prostate volume (PV), PSA values, IPSS and IIEF scores of the patients were compared. The mean age of 66 male patients diagnosed with ED and BPH was 48.1±6.9 years. The mean IPSS score of the patients before the treatment was 9.85 which represents moderate LUTS. After the treatment, the mean score decreased to 5.7 which represents mild LUTS. Before the treatment, the mean IIEF score showed mild ED with 18.79. After the treatment, the mean IIEF score increased to 29,9. The treatment statistically significantly decreased ED and increased the IIEF score (p=0.000). While the mean Qmax and Qave were increased statistically significantly (p=0.000). A statistically significant decrease was observed in the mean PVR from 60.1 ml to 37.6 ml (p=0.000). The decrease in PV was not statistically significant (p=0.321). The decrease in PSA values before and after treatment was found to be statistically significant with p=0.046. It has been shown that the daily use of 5 mg Tadalafil alone for 12 weeks can be a preferable treatment option, especially in younger patients with BPH / LUTS and ED

Fluctuations of the order parameter's phase in layered superconductors

The influence of the quantum fluctuations of the order parameter's phase on the critical temperature T-c is studied for a Josephson coupled layered superconductor. Two characteristic critical temperatures exist for a system, namely the superconducting critical temperature T-c((2)) for a single layer estimated by the mean-field theory and the transition temperature for the outset or the superconducting phase coherence T*(c). The true critical temperature T-c is shown to vary inside the intervals T*(c) less than or equal to T-c less than or equal to T-c((2)). For a strong quantum phase fluctuation limit, the superconducting layers become decoupled

Electrical properties of high temperature insulation coatings under various pressures at 298 K and 77 K

The high temperature insulation coatings were prepared using solution of Mg and Zr based precursors. Then the MgO-ZrO2 coating was applied on long-length Stainless-Steel tapes using a non-vacuum reel-to-reel sol-gel dip coating technique. The thicknesses of coatings 7, 12 and 15 mu m for 4, 8 and 12 dip, respectively. Three different types of stycast, 2850 FT/24 LV Black and Blue, and White Buechler Epoxide Resin were studied. Stycast thicknesses were varied from 32-18 mu m, when pressure was applied from 0 to 0.54 GPa. Electrical properties of the coated tapes were investigated under various pressures at room temperature (298K) and in liquid nitrogen (77K)