نتایج جستجو برای: base isolation

تعداد نتایج: 384568  

Journal: :International Journal of Research in Engineering and Technology 2015

Journal: :Sustainability 2022

In this study, a seismic isolator placed on the base of structure was optimized under various earthquake records using an adaptive harmony search algorithm (AHS). As known, base-isolation systems with very low stiffness provide rigid response superstructure, so it assumed that is and base-isolated can be considered as single-degree freedom structure. By assumption, optimization method independe...

Journal: :Revue scientifique et technique 2005
D Deka Ramneek N K Maiti M S Oberoi

Serum samples from 51 apparently healthy breeding bulls were screened for bovine herpesvirus-1 (BHV-1) antibodies using an avidin-biotin enzyme-linked immunosorbent assay, revealing a sero-positive prevalence rate of 45.09%. Semen samples were then collected from 12 of the sero-positive and 12 of the sero-negative bulls and tested for BHV-1 antigen using both a virus isolation assay and a polym...

Journal: :Methods in enzymology 2015
Thomas M Carlile Maria F Rojas-Duran Wendy V Gilbert

RNA molecules contain a variety of chemically diverse, posttranscriptionally modified bases. The most abundant modified base found in cellular RNAs, pseudouridine (Ψ), has recently been mapped to hundreds of sites in mRNAs, many of which are dynamically regulated. Though the pseudouridine landscape has been determined in only a few cell types and growth conditions, the enzymes responsible for m...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1389

یک سیستم سازه ای جدید، بر اساس فن جداسازی پایه و کاربرد مصالح هوشمند، برای کنترل سازه ها در مقابل زلزله مطرح و مورد مطالعه قرار گرفته است. با توجه به قابلیت های بالای جداسازی لغزشی (بخصوص حالت اصطکاک محض؛ pure friction) و خاصیت حافظه ی شکل (shape memory) در دستیابی به کنترلی موثر، این دو رفتار ویژه جهت طرح به صورت تعاملی مدنظر قرار گرفته اند. سیستم پیشنهاد شده از تکیه گاه های لغزشی تخت (flat sl...

Seismic isolation is a method to reduce the destructive effects of earthquakes on a structure in which the structure is separated from its foundation by devices called seismic isolators. As a result, the horizontal movements of the earthquake transmitted to the structure are reduced. The seismic isolation is used for both newly constructed structures as well as for retrofitting the existing bui...

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