A well-designed learning curve is essential for the acquisition of laparoscopic skills: but, are there risk factors that can derail the surgical method? From a review of the current literature on the learning curve in laparoscopic surgery, we identified learning curve components in video laparoscopic cholecystectomy; we suggest a learning curve model that can be applied to assess the progress o...

Control of microstructure parameters that affecting the Al-Ti-C master alloys grain refining efficiency is leading to improve the aluminum grain refinement. This study was an attempt to produce Al-Ti-C master alloys that provide these controlling factors with relying on the solute effect theory. The produced master alloys were examined by using scanning electron microscopy (SEM), energy-dispers...

In this manuscript, Current Component A lightning strike tests on three different types of carbon fiber reinforced composite panels are analyzed. The feature levels protection: no protection, medium protection and heavy protection. particular it was analyzed if there were any direct correlations between the peak electric current artificial lighting recorded velocities at back surface panels. ex...

In this study, the SPS of 0.1 µm zirconia has been performed and shows high densification rate behavior in final stage. This work consists modeling powder especially at intermediate/final stage transition. To model this, a Master Sintering Curve (MSC) is combined with an analytic to identify activation energy sintering moduli. The during tests done via Skorohod-Olevsky model. It appears from st...

Such methods as droop method, curve shifting method and master-slave were primarily developed for voltage frequency regulation in isolated power systems with synchronous generators. In modern induction generators, regulated dump loads, energy storage devices AC/DC AC/DC/AC converters, etc. are used addition to The investigation of new configurations is closely tied further development control l...

A Visual Basic program for an Excel spreadsheet was written to construct a master recession curve (MRC), using the adapted matching strip method, for recession analysis of ground water level time series. The program uses five different linear/nonlinear regression models to adjust individual recession segments to their proper positions in the MRC. The program can also be used to analyze the rece...

We analyze the thermal magnetization reversal processes in magnetic grains. Two experiments are carried out: swtiching time and switching field experiments. In both cases, we find that the simulated behavior is coherent with existing experimental data (the streched exponent of the switching time experiment increases with the temperature and is superior to unity; there exists a master curve for ...

We perform the extensive Brownian dynamics simulations on the suspensions of the monodisperse magnetic colloidal chains confined in the thin films at several different area fractions. It is shown that the long-time self-diffusion coefficients of the colloidal chains with different chain lengths converge on the single master curve, even though the area fraction of the chains is different. We als...