background: in diagnostic radiology lead apron, are usually used to protect patients and radiology staff against ionizing radiation. lead apron is a desirable shield due to high absorption and effective attenuation of x-ray photons in the diagnostic radiology range. objective: although lead aprons have good radiation protection properties, in recent years, researchers have been looking for alte...

An actuator is a device that converts input energy into mechanical energy. According to various types of input energy, various actuators have been advanced. Displacement in the electromagnetic, hydraulic and pneumatic actuators achieve by moving a piston via electromagnetic force or pressure, however the piezoelectric actuator (piezoceramic plates) displace directly. Therefore, accuracy and spe...

background: lead-based radiation shields are widely used in radiology departments to protect both workers and patients from any unnecessary exposure to ionizing radiation. recently there has been a great deal of concern expressed about the toxicity of lead. human lead toxicity is well documented. in that light, production of environmentally-friendly lead-free radiation shields with less weight ...

Stories of Liminality: Living With Life-Threatening Illness 35 Anne Bruce, Laurene Sheilds, Anita Molzahn, Rosanne Beuthin, Kara Schick-Makaroff, and Sheryl Shermak Leadership Lessons in Global Nursing and Health From The Nightingale Letter Collection at the University of Alabama at Birmingham 44 Doreen C. Harper, Kimberly S. Davey, and Pamela N. Fordham Practice The Feasibility of a Holistic W...