Gas separation using graphene nanosheet: insights from theory and simulation.

The investigation of porous graphene, especially experimental research, is a challenging issue in related academic and technology and has become a hot topic in recent years. It is well known that the preparation of porous graphene is a difficult problem in experimental techniques. To prepare nanoporous graphene, much attention must focus on the quality of nanoporous structures and throughput array pores. Therefore, a comprehensive summary as much as possible has been made to provide a better understanding of the progress. A summary of synthesis techniques, the properties of nanoporous graphene membranes from the synthesis point of view, and potential applications of porous graphene and graphene oxide for gas separation on the basis of theoretical studies were given attention in this paper. Gas separation, including carbon dioxide capture, gas storage, natural gas sweetening, and flue gas purification through porous graphene, is of great interest. Porous graphene with narrow pore distribution provides exciting opportunities in gas separation processes.

The Detection of Burn-Through Weld Defects Using Noncontact Ultrasonics.

Nearly all manufactured products in the metal industry involve welding. The detection and correction of defects during welding improve the product reliability and quality, and prevent unexpected failures. Nonintrusive process control is critical for avoiding these defects. This paper investigates the detection of burn-through damage using noncontact, air-coupled ultrasonics, which can be adapted to the immediate and in-situ inspection of welded samples. The burn-through leads to a larger volume of degraded weld zone, providing a resistance path for the wave to travel which results in lower velocity, energy ratio, and amplitude. Wave energy dispersion occurs due to the increase of weld burn-through resulting in higher wave attenuation. Weld sample micrographs are used to validate the ultrasonic results.

Spouses of male psychiatric patients are more prone to intimate partner violence.

Intimate partner violence (IPV) is a great public health concern. Most studies have evaluated different risk factors of IPV in general population, but few have evaluated the perpetration of IPV by subjects with psychological disease. We evaluated the prevalence of IPV among spouses of men with psychiatric disease. In this descriptive study, we questioned 119 women whose husbands were in-patient or out-patients of psychology clinic. A validated questionnaire was used for evaluation IPV and its different subtypes. All women reported to encounter some kind of IPV in some periods. Women reported emotional abuse in 100%, physical abuse in 99.2% and sexual abuse in 81.5%. None of the patients were eager to tell anyone about being victim of IPV due to religious beliefs, society culture and believing in their marital status and trying to keep their marriage. IPV is higher among families with men having psychological disease. Policy makers and clinicians should predominantly target these families. Also, empowering women may reduce the risk of intimate partner violence.