Abstract The study presents the crack mouth opening and propagation of cracks in a composite material printed by extrusion subjected to monotonic loading. is made out nylon matrix (with embedded short carbon fiber—called Onyx ® ) reinforced with continuous Kevlar fibers. Three-point bending tests were performed on notched specimens built according ASTM-E399. Tests digitally recorded extract dis...

Single-well reactive tracer tests, such as the push-pull test are useful tools for characterising in-situ bioattenuation processes in contaminated aquifers. However, the analytical models that are used to interpret push-pull data may be over-simplified, and potentially overlook important processes responsible for the frequent discrepancy between predicted and observed results obtained from push...

Aerosol filtration in fibrous filters is one of the principal methods of removal of solid particles from the gas stream. The classical theory of depth filtration is based on the assumption of existing single fiber efficiency, which may be used to the recalculation of the overall efficiency of the entire filter. There are several reasons for inappropriate estimation of the single fi...

A novel single-stage push–pull electronic ballast with high input power factor is presented in this paper. The proposed electronic ballast combines the front-end power-factor corrector and push–pull converter into a single-stage converter. Compared to the single-stage class-D electronic ballast, the proposed circuit does not require an isolated driver. The control of the circuit is easier and t...

We study torsion-free, rank 2 Higgs sheaves on genus one fibered surfaces, (semi)stable with respect to suitable polarizations in the sense of Friedman and O’Grady. prove that slope-semistability a sheaf surface implies semistability generic fiber. In case odd fiber degree elliptic surfaces characteristic $$\ne 2$$ , we any moduli space fixed numerical invariants splits canonically as product o...

I feel somewhat relaxed and freer since I resigned from the position of Vice Minister of Finance for International Affairs about a month ago. At least now I don’t have to worry about what I say about the yen/US dollar rate for the wire people who used to follow me all over the world. I would like to remind you that what I say today does not necessarily reflect the official views of the Japanese...

Introduction Geriatric patients and their relative fragility with respect to younger patients represent a surgical dilemma for the general surgeon. This has led surgeons to adopt "tailored" techniques and strategies to treat them. The rapid increase of this aged population has given the clinician the chance to push forward the knowledge on this subset of patients and challenge previous concepts...

An advanced feedback control strategy for a vapor-phase axial deposition (VAD) is investigated in this paper. VAD is a widely used process in the creation of high purity glass for optical fiber. In previous work a soot tip surface temperature controller was developed for the VAD process to reduce the effects of core soot temperature variation on deposition geometry, leading to a more stable pro...

AIM This study was undertaken to examine the effect of root canal (RT) sealers content and the cleaning procedure of RT walls on bond strength (BS) of a fiber reinforced composite (FRC) post cemented with resin-based or zinc phosphate cement. MATERIALS AND METHODS Forty bovine roots were divided into 2 groups (n = 20) and obturated with gutta-percha points plus Sealer 26 sealer or gutta-perch...