C and metallic bonding in solids profoundly impacts their properties, which have been widely exploited by humankind since ancient times. More exotic types of chemical bonding in solids are also known, for example, mixed ioniccovalent bonding characteristic of certain ceramics and perovskites. The basic classification of materials according to the type of chemical bonding in them goes together w...

We present COBS — a model of a concurrent object-based computational system with handshakes as elementary actions of inter-process communication. Processes are considered to be partial views of the system. Their communication by asynchronous message passing and variable sharing is modeled by elementary processes on the same abstraction level. The same acts of computation and communication can b...

Most of the Arabic language vocabulary is built from the roots derivation. These roots are words composed of three to five consonants letters. Any performance in Arabic language for the purpose of information retrieval needs to deal with the language morphological and structural changes first (which is called the stemming process) then a statistical method for extracting information is implemen...

با توجه به اهمیت حذف یون استرانسیم موجود در پساب‌­های هسته­ای، کار حاضر ضمن سنتز لیگاندهای هیدروکسی بنزآلدهید پروپیل تری اتوکسی سیلان (Si-HL3(EtO)) و پیریدیل متیلیدین (Si-L3(EtO)) بررسی خصوصیات نانو ذرات سیلیکای اصلاح ­شده این لیگاندها ­عنوان جاذب جامد از محلول آبی پرداخته شد پارامترهایی مانند pH، زمان، جرم جاذب، دما یون‌­های مزاحم مورد آزمایش قرار گرفت. رفتار جذبی جاذ­ب‌­ها نشان داد سطح توانای...