In this work, a comparative study on different drill point geometries and feed rate for composite laminates drilling is presented. For this goal, thrust force monitoring during drilling, hole wall roughness measurement and delamination extension assessment after drilling is accomplished. Delamination is evaluated using enhanced radiography combined with a dedicated computational platform that i...

abstract   background: due to the high incidence of breast cancer and the effect of its early diagnosis on decreasing morbidity and mortality, we used the gail model to study breast cancer risk in iranian women.   methods: this study was done in a simple randomized way. participants were 2000 iranian women older than 35 years old. the questionnaire consisted of demographic data such as age, rac...

background: the aim of this study was to determine bioavailability heavy metal concentrations of cu, cd, cr, co and zn and health risk assessment in different types of klang district, selangor (malaysia) urban surface soil using in physiologically based extraction test in vitro human digestion model. methods: a total of 76 urban surface soil was sampled based on seven different types of land us...

conclusions our results showed that the study population perceived a high likelihood of cchf risk. improving public knowledge and awareness could result in a more realistic assessment of cchf risk, hence better compliance with taking precaution measures to tackle the disease. results approximately 70% of the respondents reported the cchf risk to be 'high'. factors independently associated with ...

Drilling carbon/epoxy laminates is a common operation in manufacturing and assembly. However, it is necessary to adapt the drilling operations to the drilling tools correctly to avoid the high risk of delamination. Delamination can severely affect the mechanical properties of the parts produced. Production of high quality holes with minimal damage is a key challenge. In this paper, delamination...

Nowadays we can observe a growing demand for installations of new gas pipelines in Europe. A large number them are installed using trenchless Horizontal Directional Drilling (HDD) technology. The aim this work was to develop and compare machine learning models dedicated risk assessment HDD projects. data from 133 projects eight countries the world were gathered, profiled, preprocessed. Three mo...

A functional assessment of hand flapping exhibited by a 5-year-old boy was conducted in a general education classroom. After a descriptive analysis ruled out several potential variables maintaining hand flapping, an experimental analysis was used to test the hypothesis that teacher-delivered task demands were functionally related to hand flapping. Results of the experimental analysis were used ...

Introduction: Commercial drilling, even deep-sea or remote, depends on human teleoperation. Lightspeed delays mean that coring and drilling beyond the Moon requires automation in order to not get stuck or risk mission failure. The Drilling Automation for Mars Exploration (DAME) is a NASA project for developing critical-path drilling software technologies. The DAME project’s purpose was to devel...