This study aimed at presenting a method for formulating optimal production, repair and replacement policies. The system was based on the production rate of defective parts and machine repairs and then was set up to optimize maintenance activities and related costs. The machine is either repaired or replaced. The machine is changed completely in the replacement process, but the productio...

this presentation features, modalities: plain radiographs, ct, mri, and ultrasound; arthroplasty; hardware loosening; suture anchor migration; avn, collapse, arthritis; rotator cuff repair; labral repair.

background inguinal hernia is the most prevalent surgical disease in clinical practice. endoscopic inguinal hernia repair has been shown to be slightly superior to open approaches. recent modifications in the minilaparoscopic technique may improve the totally extraperitoneal repair (tep) results. objectives we have performed a prospective study to analyze the feasibility of laparoscopic inguina...

In this article, we survey machine repair problems (MRP) with an emphasis on historical developments of queuing models of practical importance. The survey proceeds historically, starting with developments in 1985, when the first published review on machine interference models appeared. We attempt to elaborate some basic MRP models of the real life congestion situations. The brief survey of some...

welding is one of the most important assembling methods which are widely applied in different applications. in service conditions, some of the weld joints which meet defects must be repaired. the residual stresses impress the operation and efficiency of the repair weldment. in this study, the temperature and the residual stress fields were investigated by both the finite element simulation and ...

DNA is subjected to many endogenous and exogenous damages. All organisms have developed a complex network of DNA repair mechanisms. A variety of different DNA repair pathways have been reported: direct reversal, base excision repair, nucleotide excision repair, mismatch repair, and recombination repair pathways. Recent studies of the fundamental mechanisms for DNA repair processes have revealed...

Background: Radiotherapy is an effective and important therapeutic method for breast cancer, but at the same time it has a radiation-induced bystander effect on normal tissue around the tumor. Repair of double-strand breaks (DSBs) by normal cells can reduce the extent of damage caused by this effect. Caveolin-1 (Cav-1) is an important regulatory molecule in cell signal transduction. However, th...

This investigation deals with M/M/R/N machine repair problem with R non-reliable service stations which are subjected to unpredictable breakdown. 1here is provision of an additional server to reduce backlog in the case of heavy load of failed machines. 1he permanent service stations repair the failed machines at an identical rate m and switch to faster repair rate when all service stations are ...

introduction with the growing popularity of totally extraperitoneal (tep) laparoscopic inguinal hernia repair, many surgeons will inevitably face the clinical conundrum of how to simultaneously repair an umbilical hernia and an inguinal hernia via tep approach. case presentation in this case report, we describe the successful use of the umbilical hernia defect to insert the balloon dissector an...