The electronic structure of graphene-graphane superlattices with armchair interfaces is investigated with first-principles density-functional theory. By separately varying the widths, we find that the energy gap Eg is inversely proportional to the width of the graphene strip and that the gap increases as the hydrogenated strip becomes wider due to the enhanced confinement effect. It is further ...

We prove the absence of a direct quantum phase transition between a superfluid and a Mott insulator in a bosonic system with generic, bounded disorder. We also prove the compressibility of the system on the superfluid-insulator critical line and in its neighborhood. These conclusions follow from a general theorem of inclusions, which states that for any transition in a disordered system, one ca...

Roll-to-roll (R2R) slot-die coating systems are mostly devoted to the mass manufacture of printed electronics. This study examined the correlation among the operating conditions, thickness, and width of the patterned strip fabricated by the R2R slot-die system. A full factorial experiment was conducted to screen for effective parameters. The velocity of a moving substrate was found to be the mo...

Midinfrared lasers with an asymmetrical InPAsSb/InAsSb/AlAsSb double heterostructure are reported. Using the asymmetrical double heterostructure, pand n-cladding layers are separately optimized; high energy-gap AlAsSb (Eg'1.5 eV! for the p-type cladding layer to reduce the leakage current, and thus to increase To , and low energy-gap InPAsSb (Eg'0.5 eV! for the n-cladding layer to have low turn...

Abstract The current study examines thin film flow and heat transfer phenomena with some additional effects such as magnetohydrodynamic, viscous dissipation, slip condition over unsteady radially stretching surfaces for various shapes of copper ( Cu ) \left({\rm{Cu}}) nano...

In this experimental work, Manganese oxide (MnO2), Zinc oxide (ZnO), Iron oxide (Fe2O3) and Magnesium chloride (MgCl2) were used as activating flux to investigate the effects for SS 304 in tungsten inert gas (TIG) welding. Ultimate tensile strength, percentage elongation, Penetration depth and width were studied of material SS 304. The experimental results indicated that the MnO2 and Fe2O3 flux...

The purpose of this research is to analyze toll road’s efficiency performance in Indonesia within 2018-2022 period.Using the Data Envelopment Analysis (DEA) method, operating costs and maintenance assessed for 20 road sections Indonesia. Additionally, study employs Tobit regression technique examine impact Capital Structure (proxied by Debt-to-Equity Ratio) technological sophistication Gross Do...

background:poisoning with ethylene glycol (eg) can be fatal even if appropriate treatments are delivered. eg poisoning usually causes central nervous system depression, cardiovascular dysfunction, metabolic acidosis and acute renal failure (arf). case report:a 33-year-old man was referred to the emergency department with reduced consciousness and dyspnea of four-hour duration due to unknown rea...

background: cryopreservation of mammalian ovaries has been reported with different levels of success. cryopreservation of ovarian tissue may be a potential alternative for treatment of infertility and many attempts have been done to improve the efficiency of ovarian cryopreservation. the objective of the present study was to compare the direct cover vitrification (dcv) with ethylene glycol (eg)...

BACKGROUND Particulate air pollution has been consistently linked to increased risk of arterial cardiovascular disease. Few data on air pollution exposure and risk of venous thrombosis are available. We investigated whether living near major traffic roads increases the risk of deep vein thrombosis (DVT), using distance from roads as a proxy for traffic exposure. METHODS AND RESULTS From 1995 ...