During the COVID-19 pandemic, frequent facemask use resulted in skin adverse effects among some health care workers. The aim of this study is to investigate primary healthcare workers who have been using face masks Qassim, Saudi Arabia. A cross-sectional was conducted a self-administered online questionnaire containing 17 questions. survey by sending an invitation link carried out between June ...

The research described in this paper focuses on the application of modal strain techniques on a multi-girder bridge superstructure with the objectives of identifying the presence of damage and detecting false damage diagnosis for such structures. The case study is a one-third scale model of a slab-on-girder composite bridge superstructure, comprised of a steel-free concrete deck with FRP rebars...

For pharmaceuticals, current regulatory guidance for photosafety testing states that studies are warranted for drug candidates that both absorb light in the range of 290-700 nm and that are either applied topically or reach the skin or eyes by systemic exposure. In contrast to standard genotoxicity evaluations, where a positive (or equivocal) result in vitro can be placed into context with addi...

We examine drag-reduction proposals, as presented in this volume and in general, first with concrete examples of how to bridge the distance from pure science through engineering to what makes inventions go into service; namely, the value to the public. We point out that the true drag reduction can be markedly different from an estimate based simply on the difference between turbulent and lamina...

Early rationale. The main progress in the unders tanding and trea tment of leprosy has occurred chiefly within the century just passed. Since, however, leprosy involves predominantly the skin and peripheral nerves, its manifestations were in considerable measure readily evident and empirically documented long before pathologic understanding of disease processes began to develop. Thus, in China,...

Local scouring around bridge piers is a natural phenomenon caused by the erosive process of flowing stream on alluvial beds. The 3D flow field around bridge piers interacting with the bed materials increases complexity of local scour process. The local scour depth develops in accelerated flows and if it is not predicted correctly, the bottom level of local scour hole will exceed the original le...

OBJECTIVE Novel approaches to bridge the gap between clinical studies and experimental basic research of skin physiology are urgently needed. The aim of this study was to develop an effective surrogate model in which ex vivo full-thickness organ culture experiments may be performed. METHODS Human full skin from patients was placed into a stainless steel chamber and cultured at an air-liquid i...

In this work we present the λ-coordinates, a new system for representing points in binary elliptic curves. We also provide efficient elliptic curve operations based on the new representation and timing results of our software implementation over the field F2254 . As a result, we improve speed records for protected/unprotected single/multi-core software implementations of random-point elliptic c...