Background: Functional activities mostly done in daily life such as jumping, walking, running, and stairs ascending-descending require dynamic stability of the knee. The knee joint is required to have effective efficient functional avoid injury when performing them. It can be achieved by increasing muscle strength through strengthening exercises with aim balancing agonist muscles (quadriceps fe...

i ntroduction: the aim of this study was to compare the shaping ability of two single-file systems and conventional rotary instruments in severely curved root canals of extracted human molars. methods and materials: mesiobuccal canals of 120 mandibular molars with angles of curvature ranging between 25 ° and 35 ° and radii of curvature from 5 to 9 mm, were divided into three groups ( n =40). in...

introduction: this in vitro study aimed to assess the effectiveness of a single-file rotary system (oneshape) in reduction of intracanal bacteria. methods and materials: eighty one single-rooted mandibular first premolars with single canals were used. six samples were selected as aseptic control group. seventy five remaining specimens were infected by enterococcus faecalis and incubated for 72 ...

arguably, the natural gas transmission pipeline infrastructure in iran represents one of the largest andmost complex mechanical systems in the world. the optimization of large gas trunk lines known asigat results in reduced fuel consumption or higher capability and improves pipeline operation. in thecurrent study, a single-objective optimization was conducted for khormoj compressor station on t...

High-energy particles in space often induce single event effects CMOS image sensors, resulting performance degradation and functional failure. This paper focuses on the formation morphology of transient bright spots sensors analyzes process by conducting heavy ion irradiation experiments to obtain variation law with linear energy transfer values background gray values; addition, we classify ups...

For a finite group $G$‎, ‎let $Cent(G)$ denote the set of centralizers of single elements of $G$‎. ‎In this note we prove that if $|G|leq frac{3}{2}|Cent(G)|$ and $G$ is 2-nilpotent‎, ‎then $Gcong S_3‎, ‎D_{10}$ or $S_3times S_3$‎. ‎This result gives a partial and positive answer to a conjecture raised by A‎. ‎R‎. ‎Ashrafi [On finite groups with a given number of centralizers‎, ‎Algebra‎ ‎Collo...