The effect of positioning of inlaid yarns in fillet warp knit structures

This paper presents results of an investigation on the design options available for positioning the inlaid yarn in fillet warp knit structures. The geometry and structural parameters using our previously published methodology are also presented. It is shown, for example, that if inlaying guide bar does the shifting behind the needles at two needle pitch (variants 1.11-1.13, Table.1) the filling yarn wraps the junctures from G1 ground yarns according to repeat. This position of in-laying yarn provides good stability in the fabric structure, which improves with the amount of wrapping. Thus, the different positions of the inlaid yarn within the structures offer other possibilities that could be explored when designing fillet warp knit auxetic structures. The array of data for the various design options provide analytical tool for making comparisons about the physical, structural and mechanical properties of the warp knit fillet structures. It is observed that the position of in-laying yarn has some effect on stretch characteristics of warp knit structure

METHODS OF ENHANCING DYEABILITY OF POLYMERS

The invention relates to new methods of dyeing polymers. The methods include dispersing nanomaterials into the polymers to form polymer nanocompositres, and dyeing the polymer nanocomposites with a dye. The invention also relates to dyed polymers thus obtained and articles made from these dyed polymers

Geometrical analysis of warp knit auxetic fabrics

Despite considerable interests that have been shown on the formation, properties and characteristics of auxetic knit structures there remains a dearth of information about the fundamental geometrical analytics of warp knit auxetic fabrics. This paper examines the geometrical model of auxetic warp knit structure and validates its characteristics with data obtained from experimental analysis of nine recently produced warp knit auxetic fabrics

METHODS OF ENHANCING DYEABILITY OF POLYMERS

The invention relates to new methods of dyeing polymers. The methods include dispersing nanomaterials into the polymers to form polymer nanocompositres, and dyeing the polymer nanocomposites with a dye. The invention also relates to dyed polymers thus obtained and articles made from these dyed polymers

Геометричний аналіз основовязаних аукзетик-полотен

Despite considerable interests that have been shown on the formation, properties and characteristics of auxetic knit structures there remains a dearth of information about the fundamental geometrical analytics of warp knit auxetic fabrics. This paper examines the geometrical model of auxetic warp knit structure and validates its characteristics with data obtained from experimental analysis of nine recently produced warp knit auxetic fabric

The major worldwide stress of healthcare professionals during the first wave of the COVID-19 pandemic – the international COVISTRESS survey

International audienceIntroduction The COVID-19 pandemic has initiated an upheaval in society and has been the cause of considerable stress during this period. Healthcare professionals have been on the front line during this health crisis, particularly paramedical staff. The aim of this study was to assess the high level of stress of healthcare workers during the first wave of the pandemic. Materials and methods The COVISTRESS international study is a questionnaire disseminated online collecting demographic and stress-related data over the globe, during the pandemic. Stress levels were evaluated using non-calibrated visual analog scale, from 0 (no stress) to 100 (maximal stress). Results Among the 13,537 individuals from 44 countries who completed the survey from January to June 2020, we included 10,051 workers (including 1379 healthcare workers, 631 medical doctors and 748 paramedical staff). The stress levels during the first wave of the pandemic were 57.8 ± 33 in the whole cohort, 65.3 ± 29.1 in medical doctors, and 73.6 ± 27.7 in paramedical staff. Healthcare professionals and especially paramedical staff had the highest levels of stress (p 80) compared to other workers (OR = 2.13, 95% CI 1.87–2.41). Paramedical staff risk for very-high levels of stress was higher than doctors’ (1.88, 1.50–2.34). The risk of high levels of stress also increased in women (1.83, 1.61–2.09; p 50). Conclusions The first wave of the pandemic was a major stressful event for healthcare workers, especially paramedical staff. Among individuals, women were the most at risk while age was a protective factor

The major worldwide stress of healthcare professionals during the first wave of the COVID-19 pandemic - the international COVISTRESS survey

IntroductionThe COVID-19 pandemic has initiated an upheaval in society and has been the cause of considerable stress during this period. Healthcare professionals have been on the front line during this health crisis, particularly paramedical staff. The aim of this study was to assess the high level of stress of healthcare workers during the first wave of the pandemic.Materials and methodsThe COVISTRESS international study is a questionnaire disseminated online collecting demographic and stress-related data over the globe, during the pandemic. Stress levels were evaluated using non-calibrated visual analog scale, from 0 (no stress) to 100 (maximal stress).ResultsAmong the 13,537 individuals from 44 countries who completed the survey from January to June 2020, we included 10,051 workers (including 1379 healthcare workers, 631 medical doctors and 748 paramedical staff). The stress levels during the first wave of the pandemic were 57.8 33 in the whole cohort, 65.3 +/- 29.1 in medical doctors, and 73.6 +/- 27.7 in paramedical staff. Healthcare professionals and especially paramedical staff had the highest levels of stress (p < 0.001 vs non-healthcare workers). Across all occupational categories, women had systematically significantly higher levels of work-related stress than men (p < 0.001). There was a negative correlation between age and stress level (r = -0.098, p < 0.001). Healthcare professionals demonstrated an increased risk of very-high stress levels (>80) compared to other workers (OR = 2.13, 95% CI 1.87-2.41). Paramedical staff risk for very-high levels of stress was higher than doctors' (1.88, 1.50-2.34). The risk of high levels of stress also increased in women (1.83, 1.61-2.09; p < 0.001 vs. men) and in people aged <50 (1.45, 1.26-1.66; p < 0.001 vs. aged >50).ConclusionsThe first wave of the pandemic was a major stressful event for healthcare workers, especially paramedical staff. Among individuals, women were the most at risk while age was a protective factor