فضای باز مدارس ازجمله فضاهای مهم آن‌ها و محل فعالیت‌هایی چون بازی آموزش است دانش‌آموزان مهارت‌های تحصیلی، محیطی، اجتماعی را در آن می‌آموزند، بنابراین باید تابع مشخصاتی خاص پاسخ‌گوی همۀ نیازهای باشد. اینکه آسایش حرارتی از اساسی‌ترین نیاز برای حضور حیاط است، تأمین ضروری می‌نمایاند. تعیین محدودۀ امری پیچیده مشابه، بسته به تنوع افراد، تجربیات، انتظارات، فرهنگ، سن، جنسیت آن‌ها، متفاوت است. پژوهش حاض...

• Focus on improving low-cycle fatigue life of 316 austenitic stainless steel . Effects the application method multiple high-density pulsed electric currents. Improvement assessed using crack growth rate and tests. Effectiveness increased examined classical models. Enhanced ductility material owing to decrease in dislocation density This study evaluated (LCF) type determine effect currents (HDP...

As a new highly damage-tolerant structural material, the TC21 titanium alloy has been widely used in aerospace applications. Inertial friction welding (IFW) is form of pressure technology with less parameters and high joint performance, which especially suitable for connection rotors aero-compressors engines. In this paper, inertia alloys was successfully carried out, microhardness, tensile pro...

In recent decades, the effect of Fe element addition on titanium alloy has been investigated extensively due to development low-cost alloys, as well B microalloying, which could decrease grain size alloys during casting process. As a key structural material, study fatigue behavior is crucial and always attractive for scientists. Hence, in this paper, low cycle (LCF) fracture characteristics Ti-...

Shape Memory Alloys (SMAs) are an innovative material with the unique features of superelasticity and energy dissipation capabilities under extreme loads. Due to their features, they have a great potential be employed in structural engineering applications different conditions. However, order effectively use SMAs civil structures model behaviors accurately Finite Element (FE) packages, it is cr...

Previous studies showed that pyruvate with Tris buffer improves mechanical and metabolic functions of globally ischemic swine hearts. The purpose of the present study was to evaluate their effects during short periods of moderate regional ischemia. Studies were conducted on 21 swine hearts during maintenance of control flow to the anterior descending (LAD) and circumflex (LCf) coronary arteries...