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Introduction: Chronic venous insufficiency (CVI) is a condition that the function of venous system is impaired due to insufficiency of venous valves. The prolonged periods of standing or sitting is considered the most crucial risk factor of CVI. This study aims to determine the prevalence and associated factors of CVI among seafood processing workers. Methods: A cross-sectional study was conducted through clinical examination and face-to-face interviews with 1160 seafood processing workers in Hai Phong from March to November in 2023 to assess the prevalence and associated factors to CVI. Results: The prevalence of CVI was 51.9%; the prevalent symptom was restless legs (54.0%); nocturnal cramps (49.3%); tight feeling in calves (43.2%); pins and needles (36.4%); edema lower legs (28.6%). Of all participants 4.1% were C0, 82.9% were C1, 11.0% were C2 and 2.0% were C3. Some factors associated with CVI: female (OR = 2.51, p=0.002); advanced age; prolonged periods of standing or sitting (OR = 2.08, p=0.001); overweight and obesity (OR =1.82, p=0.037); Abdominal obesity (OR =2.11, p=0.025); diabetes (OR = 1.95, p=0.045); hypertension (OR =2.59, p=0.004); gave birth to 2 and 3 children (OR = 1.78 and 2.35, p=0.002); working time over 8 hours per day (OR =3.87, p

The thermal stability of mechanically alloyed amorphous Al-Fe-based alloy powders, with nominal compositions Al _82 Fe _16 Ce _2 and Al _82 Fe _14 Mn _2 Ce _2 , was investigated using differential scanning calorimetry (DSC), x-ray diffraction (XRD), and scanning electron microscopy (SEM) complemented by energy-dispersive x-ray spectroscopy (EDX). Analysis through DSC indicated that both Al _82 Fe _16 Ce _2 and Al _82 Fe _14 Mn _2 Ce _2 alloys undergo a two-stage crystallization process. Notably, the initial crystallization temperatures for the Al _82 Fe _16 Ce _2 and Al _82 Fe _14 Mn _2 Ce _2 alloys were determined to be approximately 525 °C and 550 °C, respectively. This high thermal stability is attributed to the delayed nucleation process induced by the presence of Ce and Mn within the Al-Fe matrix. During polymorphic crystallization, distinct phases such as β -AlFe, Al _13 Fe _4 for Al _82 Fe _16 Ce _2 , and β -Al(Fe, Mn), Al _13 Fe _4 , Al _10 CeMn _2 for Al _82 Fe _14 Mn _2 Ce _2 were identified. Furthermore, post-annealing of these amorphous alloy powders at elevated temperatures of 600, 700, and 800 °C led to distinct morphological characteristics based on the alloy composition. For Al _82 Fe _16 Ce _2 , the particles preserved a nearly spherical morphology, with size distributions ranging from 1 to 5 μ m. In contrast, for Al _82 Fe _14 Mn _2 Ce _2 , the particles exhibited an irregular shape with a broader size range of 1 to 15 μ m.

The paper describes the development of a high-pressure isotropic cell for studying the environmental degradation of low porosity clayey rocks. Air permeability measurements are used in this device as a tool to evaluate rock degradation in unsaturated rock specimens caused by mechanical, hydraulic and chemical paths. A modified equation, based on the air pressure decay method proposed by Yoshimi and Osterberg (1963), is presented. The proposed method is applied to an Australian clayey shale. Estimated values of air permeability are compared against those calculated using the original method which, in the case of low porosity rocks, seems to provide unrealistic values when the air pressure in the vessel decays beyond 50%.

Al82Fe16Ce2 and Al82Fe14Mn2Ce2 amorphous alloys were successfully synthesized by the mechanical alloying technique. The microstructural evolution of the milled powders was thoroughly investigated employing X-ray diffraction (XRD) and scanning electron microscopy (SEM). Additionally, their magnetic properties were quantitatively evaluated by a vibrating sample magnetometer (VSM). A full amorphous structure was obtained for both alloys after milling for 40 h. During the initial milling stage, extending from 5 to 20 h, an fcc solid solution phase was formed, coexisting with the residual Al phase. The partial substitution of 2 atomic percent (at.%) Mn for Fe in Al82Fe16Ce2 did not affect the alloy’s glass-forming ability. The amorphous Al82Fe16Ce2 and Al82Fe14Mn2Ce2 powders exhibited a nearly spherical shape, with diameters ranging from 1 to 3 µm and to 10 µm, respectively. Additionally, both the Al82Fe16Ce2 and Al82Fe14Mn2Ce2 alloys demonstrated characteristics of hard magnetism.

This study examines the relationship between green hotel practices and consumer revisit intention, with the mediating mechanisms of brand identification, promotion focus, and green consumption value. A paper-based survey was conducted to collect data from consumers in four-star or above hotels in China. Findings from multivariate data analysis show that green hotel practices positively influence consumer to revisit intention, which is mediated by brand identification and green consumption value. Moreover, consumer promotion focus positively mediates the relationship between green hotel practices and brand identification. The findings validate a unique multi-path mediating model of green hotel practices. They also have important implications for hotel managers interested in developing genuine environmental initiatives to generate positive customer responses. [ABSTRACT FROM AUTHOR]

In this paper, the influence of mechanical milling on the microstructural evolution and magnetic properties of Al82Fe14Ni4 alloys prepared by mechanical alloying is investigated. The elemental powder mixture was processed under argon gas at 250 rpm and 350 rpm using a planetary ball mill. The powder particles experienced severe deformation, fragmentation and mutually cold-welding during the collisions of the balls. The diffraction peaks of the Al, Fe and Ni phases gradually disappeared during the milling process, and a halo peak corresponding to the amorphous phase formed. The amorphization of powders milled at 250 rpm was slower than that of 350 rpm. These alloys achieved a fully amorphous structure after milling for 60 h. The amorphous powder alloy milled at 350 rpm exhibited higher thermal stability compared with that of an alloy milled at 250 rpm. The saturation magnetization and coercive of the milled Al82Fe14Ni4 alloy powder were decreased following the formation of a para-magnetic amorphous phase. The highest compressive strength, about 710 MPa, was obtained for the Al82Fe14Ni4 alloy sintered at 600 °C by SPS.