CT/MRI LI-RADS v2017 : review of the guidelines

The Liver Imaging-Reporting and Data System (LI-RADS or LR) is a classification system for reading and reporting imaging studies in patients with high risk for hepatocellular carcinoma (HCC). One of its main goals is to improve communication between specialties, especially radiologists, hepatologists, surgeons, and pathologists. LI-RADS defines imaging features of the lesions and stratifies the risk of HCC into categories. It is the most comprehensive and highly specific system; however, its seeming complexity prevents many radiologists from using it in everyday practice. This article is a detailed review of the latest version of LI-RADS (v. 2017), which should be helpful for radiologists who are not very familiar with the system and its latest update

Heat dissipation of high rate Li-SOCl sub 2 primary cells

The heat dissipation problem occurring in the lithium thionyl chloride cells discharged at relatively high rates under normal discharge conditions is examined. Four heat flow paths were identified, and the thermal resistances of the relating cell components along each flow path were accordingly calculated. From the thermal resistance network analysis, it was demonstrated that about 90 percent of the total heat produced within the cell should be dissipated along the radial direction in a spirally wound cell. In addition, the threshold value of the heat generation rate at which cell internal temperature could be maintained below 100 C, was calculated from total thermal resistance and found to be 2.9 W. However, these calculations were made only at the cell components' level, and the transient nature of the heat accumulation and dissipation was not considered. A simple transient model based on the lumped-heat-capacity concept was developed to predict the time-dependent cell temperature at different discharge rates. The overall objective was to examine the influence of cell design variable from the heat removal point of view under normal discharge conditions and to make recommendations to build more efficient lithium cells

Corrigendum to "Effects of organic composition on mesophilic anaerobic digestion of food waste" [Bioresour. Technol. 244 (2017) 213-224]

Yangyang Li, Yiying Jin, Aiduan Borrion, Hailong Li, Jinhui Li (2017) Effects of organic composition on mesophilic anaerobic digestion of food waste, Bioresource Technology, Volume 244, Part 1, November 2017, Pages 213-224 (https://doi.org/10.1016/j.biortech.2017.07.006

Changement grammatical et discursif en français multiculturel de la région parisienne : éléments de comparaison

Cet article cherche à comparer la variation et le changement dans deux domaines linguistiques, à savoir la grammaire et le discours. Il présente les résultats du projet « Multicultural London English – Multicultural Paris French » et s’interroge sur les différences dans l’usage des traits innovants et leur corrélation avec certaines catégories sociales. Du côté grammatical, la recherche se concentre en particulier sur l’usage des interrogatives indirectes in situ telles que 'je sais pas c’est qui' et 'je sais ça veut dire quoi', fréquemment utilisées à l’oral chez certains locuteurs. Du côté pragmatico-discursif, elle discute de l’utilisation des particules d’extension (et tout, et tout ça). L’étude révèle que la distribution des innovations discursives n’est pas la même que celle des innovations grammaticales, dont l’usage est davantage clivé en fonction des catégories sociales. L’article tente d’apporter des éclairages sur les processus de grammaticalisation et de changement, en s’interrogeant sur l’existence d’un français multiculturel typiquement « jeune » ou typiquement « parisien »

Improved signal injection based sensorless technique for PM brushless AC drives

The accuracy of rotor position estimation in the conventional signal injection based sensorless control of permanent magnet brushless AC drives depends on the load current. This paper proposes an improved method, which significantly reduces the estimation error by accounting for the cross-coupling effect between the d-and q-axes. The conventional and proposed methods are described and their performance is compared by both simulation and experiment

A study of food buying behavior among Chinese children

The paper reports a study on food buying behaviour among Chinese children aged between 10-13 years old. There are two important findings. Firstly, the growing influence of commercial environment. During the learning of consumer behaviour by Chinese children, the parental role of guidance remains prominent, and their recommendations have a decisive impact on children’s food choices. Secondly, the perceived importance of product attributes. Chinese children tend to pay more attention to nutrition, hygienic conditions and food safety, which shows that children seem to be mature early at this stage and start to behave in a more adult-like fashion when making purchase comparisons