PURPOSE To investigate the ability of slip interface imaging (SII), a recently developed magnetic resonance elastography (MRE)-based technique, to predict the degree of meningioma-brain adhesion, using findings at surgery as the reference standard. MATERIALS AND METHODS With Institutional Review Board approval and written informed consent, 25 patients with meningiomas >2.5 cm in maximal diame...

Random coe cient regression models have been applied in di erent elds and they constitute a unifying setup for many statistical problems. The nonparametric study of this model started with Beran and Hall (1992) and it has become a fruitful framework. In this paper we propose and study statistics for testing a basic hypothesis concerning this model: the constancy of coe cients. The asymptotic be...

Diamond-like carbon (DLC) coatings are used due to their extraordinary tribomechanical properties, great hardness, high elastic modulus, wear resistance, low friction coefficient and chemical inertness, which provide them with biocompatibility. Compared other physical vapor deposition (PVD) of transition nitrides carbonitrides, DLC has limited adhesion, so it is necessary develop new techniques...

Abstract Diamond-like carbon (DLC) films are deposited on rubber surfaces to protect the components, and surface pretreatment of substrates prior film deposition can improve adhesion between DLC rubber. Thus, principal purpose this work concentrates determining effects argon (Ar), oxygen (O 2 ), nitrogen (N hydrogen (H ) plasma pretreatments friction performance (DLC/rubber). The results indica...

Background: Abdominal adhesions are considered as an important problem in abdominal surgery. In this study we compared the effectiveness of atorvastatin, hyaluronic acid and interceed (oxidized cellulose) in prevention of postoperative intestinal adhesions. Material and Methods: A total of 40 Wistar-albino rats were randomly divided into 5 groups: Group 1 (Sham); Group 2 (Control ...

Cold forging of automotive parts in high strength steel causes pressure on the die. The or heavy load reduces a die life and accuracy forged parts, so prediction more accurate helps us to design optimum dimensions process. In this report, precise frictional coefficient was measured by ring compression test predict cold upsetting steel. experimental results indicated μ about 0.19 within height r...

Cylindrical telescopic crowns belong to bolt dentures, because their adhesion strength is based on the friction force. The magnitude of static and slide friction forces depends on the strain within the contact area and properties of materials employed. Friction force value between telescope elements declines in the first phase of wearing period and, subsequently, maintains particular constant v...

This paper experimentally investigated the effects of silicone oil on tribological behaviour AZ31B/86CrMoV7 contact pair under a pin-on-disk configuration. A commercial was used as an oxidation inhibiter for AZ31B at elevated temperatures to 300 °C. The wear mechanism explored by SEM morphologies worn surfaces. analysis revealed that can effectively minimize surface oxidation. Compared with dry...

Here, a fluorine-free robust superhydrophobic coating was fabricated on the Al alloy substrate by simple and low-cost approach. Embed modified TiO2 nanoparticles onto semi-cured epoxy resin adhesive layer prominently reduces content of low-energy materials (stearic acid) coating. This prepared with hierarchical structures, re-entrant structures low surface energy shows superhydrophobic. The exc...