Search results for "tool ..."

Tool Wear and Damage

2008

This chapter provides comprehensive knowledge regarding tool wear mechanisms and characterizes their physical fundamentals. Adhesion, abrasion, diffusion and oxidation are selected as predominant mechanisms controlling tool wear, depending on the mechanical and thermal conditions at the rake and flank faces. The analytical models describing the wear rate and volumetric material loss for different wear mechanisms are provided. The tool wear indicators related to crater, flank and notch wear specified in ISO 3685 are presented for both flat-faced and grooved tools. Tool life is defined and corresponding models, including the influence of cutting speed, feed and the depth of cut, are derived. …

La perception phonémique en français des apprenants polonophones (le cas des voyelles antérieures de moyenne aperture : [e][ɛ])

2017

The perception of sounds of a foreign tongue influences the quality of comprehension and speaking in the language, as well as learning how to read and write properly. The differentiation and identification of sounds enables the development of aural-verbal memory, subsequently associating particular sound patterns with particular meanings. In other words, a developed perception of sounds ensures an efficient communication in a foreign language. Since learners perceive foreign sounds with varied proficiency, the teacher should recognize the difficulties and undertake remedial measures to facilitate learning progress. This article aims to present an educational tool, currently in development, …

A survey and comparison of transformation tools based on the transformation tool contest

2014

Model transformation is one of the key tasks in model-driven engineering and relies on the efficient matching and modification of graph-based data structures; its sibling graph rewriting has been used to successfully model problems in a variety of domains. Over the last years, a wide range of graph and model transformation tools have been developed – all of them with their own particular strengths and typical application domains. In this paper, we give a survey and a comparison of the model and graph transformation tools that participated at the Transformation Tool Contest 2011. The reader gains an overview of the field and its tools, based on the illustrative solutions submitted to a Hello…

Datorzinātne un informācijas tehnoloģijas

2011

Update I. A systematic review on the efficacy and safety of chloroquine/hydroxychloroquine for COVID-19

2020

Purpose To assess efficacy and safety of chloroquine (CQ)/hydroxychloroquine (HCQ) for treatment or prophylaxis of COVID-19 in adult humans. Materials and methods MEDLINE, PubMed, EMBASE and two pre-print repositories (bioRxiv, medRxiv) were searched from inception to 8th June 2020 for RCTs and nonrandomized studies (retrospective and prospective, including single-arm, studies) addressing the use of CQ/HCQ in any dose or combination for COVID-19. Results Thirty-two studies were included (6 RCTs, 26 nonrandomized, 29,192 participants). Two RCTs had high risk, two ‘some concerns’ and two low risk of bias (Rob2). Among nonrandomized studies with comparators, nine had high risk and five moderat…

DELL’UTRI E CONTRADA “GEMELLI DIVERSI”: È LA REVISIONE EUROPEA LO STRUMENTO DI OTTEMPERANZA ALLE SENTENZE CEDU

2017

La Cassazione nega l’origine giurisprudenziale del concorso esterno in associazione mafiosa e individua il rimedio della revisione europea per l’attuazione della decisione CEDU nei confronti di soggetti in posizioni simili a quella di Contrada. Il percorso offre l’occasione per riflettere sulla connotazione “oggettiva” della prevedibilità e sull’uguaglianza di trattamento dei condannati. Italian supreme Court denies that the origin of external participation in mafia-type criminal association lies in case law and envisages the European review as the tool to comply with ECtHR judgements in similar cases to that of Contrada. This jurisprudence provides a proper opportunity for an in-depth exam…

Experimental and numerical analysis on post welding formability of FSWed AZ31 magnesium alloy thin joints obtained using a "Pinless" tool configurati…

2012

The post welding formability of friction stir welded AZ31 magnesium alloy thin sheets (1.5 mm thick), obtained using a “pinless” tool configuration, was widely investigated by means of the hemispherical punch method at 350°C, with a constant crosshead speed of 0.1 mm/s. The results were compared with those obtained on the base material. It has shown that formability of the joints is lower than the one of the base material. The experimental work was supported by a numerical investigation based on FEM in order to highlight the material flow occurring during the welding process. Additionally, hemispherical punch tests were simulated starting from the calculated conditions, in terms of accumula…

Experimental and numerical analysis on FSWed magnesium alloy thin sheets obtained using “pin” and “pinless” tool

2012

Intestinal symptoms and Blastocystis load in schoolchildren of Paranaguá Bay, Paraná, Brazil

2017

ABSTRACT The symptomatology of Blastocystis cannot be attributed to any particular subtype, although can be related to a high Blastocystis infection load. One stool sample from each of 217 schoolchildren of Vale de Sol Paranaguá Bay (Paraná, Brazil) was collected. Three milliliters of each fixed stool sample were processed applying the formalin-ether concentration technique. After obtaining the overall prevalence of intestinal parasites, quantification was carried out in Blastocystis positive samples. A total of 75/217 (34.6%) children suffered from intestinal symptoms (abdominal pain and/or persistent diarrhea), of whom 41.3% (31/75) presented moderate/heavy Blastocystis load with a statis…

Inferring functional patterns of tool use behavior from the temporal structure of object play sequences in a non-human primate species.

2019

Abstract Inferring functional components of behavioral sequences is a crucial but challenging task. A systematic comparison of their temporal structure is a good starting point, based on the postulate that more functional traits are less structurally variable. We studied stone handling behavior (SH) in Balinese long-tailed macaques, a versatile form of stone-directed play. We tested the hypothesis that stones are used by male monkeys to stimulate their genitals in a sexual context (i.e., “sex toy” hypothesis). Specifically, two SH actions (i.e., “tap-on-groin” (TOG) and “rub-on-groin” (ROG), respectively the repetitive tapping and rubbing of a stone onto the genital area) gained functional …