this paper proposed analytical solutions for the buckling analysis of rectangular single-layered graphene sheets under in-plane loading on all edges simply is supported. the characteristic equations of the graphene sheets are derived and the analysis formula is based on the nonlocal mindlin plate. this theory is considering both the small length scale effects and transverse shear deformation ef...

This study evaluated the construct validity and reliability of a newly devised 32-item problem quality rating scale intended to measure the quality of problems in problem-based learning. The rating scale measured the following five characteristics of problems: the extent to which the problem (1) leads to learning objectives, (2) is familiar, (3) interests students, (4) stimulates critical reaso...

The authors report the results of a confirmatory factor analysis of symptoms assessed with the Brief Psychiatric Rating Scale (BPRS) in a sample of 474 patients with schizophrenia, replicated in an independent sample of 327 patients. The most commonly used 5-factor solution for the BPRS fit the data poorly. Exploratory factor analyses performed on the first sample led to the specification of a ...

Seismic risk scenarios are obtained for an informal settlement in Mérida (Venezuela), which is representative of an important number of urban areas in earthquake-prone regions of the developing world. The vulnerability indices of the buildings range between 0.64 and 0.80 on a scale of 0 to 1. In an intensity IX earthquake scenario, more than 32% of the buildings would suffer damage of grade 4 (...

Coronavirus constitutes a family of RNA viruses causing respiratory tract infections in both humans and birds. A mild disease appears like the common cold, other cases, causes Severe acute syndrome (SARS), Middle East (MERS), or COVID-19. As compared to COVID-19, SARS MERS were limited certain countries. On hand, COVID-19 was declared pandemic by World Health Organization on Mar. 11, 2020. In t...