According to portfolio theory applied to fisheries management, economic returns are stabilised by harvesting in a portfolio stocks of species whose returns are negatively correlated and for which the portfolio economic return variance is smaller than the sum of stock specific return variances. Also, variability is expected to decrease with portfolio width. Using a range of indicators, these pre...

Objective To investigate the association between velopharyngeal insufficiency (VPI), a common finding after cleft palate repair, and various risk factors, including cleft width.Methods We performed a retrospective cohort study of patients with isolated cleft palates repaired from 2003 to 2008 at a tertiary children's hospital. Patients were observed postoperatively for development of VPI and pa...

There are several reasons why this book might be of interest to a TEX user. First, LTEX has a prominent place in the book. Second, the book describes a very interesting offshoot of literate programming, a topic traditionally popular in the TEX community. Third, since a number of TEX users work with data analysis and statistics, R could be a useful tool for them. Since some TUGboat readers are l...

An attempt was made to develop a method for sizing stable riprap around bridge piers based on a huge amount of experimental data, which is available in the literature. All available experimental data for circular as well as round-nose-and-tail rectangular piers were collected. The data for rectangular piers, with different aspect ratios, aligned with the flow or skewed at different angles to th...

Nowadays the use of the Switched Reluctance Motors (SRMs) has been considerably increased in various home and industrial applications. Despite of many advantages of this type of motors, such as simple structure, low cost, and high reliability, the main disadvantage of them is the generation of high torque pulsation. This paper presents a novel method to optimize a typical SRM such that the torq...

Inputs for the phenomenological desription of Quantum Chromo-Dynamics in the non-perturbative regime [1] can be provided from studies of the η meson production [2] and its decays [3]. Such investigations are of interest on its own account and are planned to be conducted with WASAat-COSY [4], KLOE-2 [5] and CBall-at-MAMI [6] experiments. In addition, precise determinations of the partial widths ...

In this study, we report the size-dependent transition of deformation twinning studied using in situ SEM/TEM tensile testing of defect-free [110] Au nanowires/ribbons with controlled geometry. The critical dimension below which the ordinary plasticity transits to deformation twinning is experimentally determined to be ∼170 nm for Au nanowires with equilateral cross-sections. Nanoribbons with a ...