scholarly journals Foaming Behavior and Pore Structure Evolution of Foamed Aluminum under the Extrusion Constraint

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Lucai Wang ◽  
Yanli Wang ◽  
Xiaohong You ◽  
Fang Wang
Keyword(s):  
Pore Structure ◽  
Aluminum Foam ◽  
Melting Behavior ◽  
Heating Time ◽  
Structure Evolution ◽  
Heating Rates ◽  
Cross Sectional ◽  
Factors Affecting ◽  
Maximum Expansion ◽  
Foaming Behavior

This study evaluates foaming behavior and pore structure evolution of aluminum foam by cross-sectional image processing, which was prepared by the powder compact melting (PCM) method under the constraint. The results revealed that the heating time and the heating rate are the key factors affecting the foaming behavior and pore structure of aluminum foam. The thermal decomposition of the foaming agent and aluminum melting behavior affect the foam expansion under different heating times and heating rates. The evolution of the pore structure during the foaming process includes pore formation, small-sized spherical pores, large-sized spherical pores, polygonal pores, merging, and collapse. Due to the limitation of the pipe wall, the maximum expansion height and porosity are constrained, and the macrostructure of aluminum foam is improved.

PARTICIPATING IN HEALTH INSURANCE AND FACTORS AFFECTING AMONG PERSONS WHOSE ENROLMENT IS VOLUNTARY IN THUA THIEN HUE PROVINCE

2015 ◽  
pp. 89-95
Author(s):  
Thi Hoai Thuong Nguyen ◽  
Hoang Lan Nguyen ◽  
Mau Duyen Nguyen
Keyword(s):  
Health Insurance ◽  
Insurance Coverage ◽  
Health Insurance Coverage ◽  
Health Insurance Scheme ◽  
Insurance Scheme ◽  
Cross Sectional ◽  
Factors Affecting ◽  
The People ◽  
Universal Health Insurance Coverage ◽  
The Social

Background:To provide information helps building policy that meets the practical situation and needs of the people with the aim at achieving the goal of universal health insurance coverage, we conducted this study with two objectives (1) To determine the rate of participating health insurance among persons whose enrolment is voluntary in some districts of ThuaThien Hue province; (2) To investigate factor affecting their participation in health insurance. Materials and Methodology:A cross-sectional descriptive study was conducted in three districts / towns / city of ThuaThien Hue in 2014. 480 subjects in the voluntary participation group who were randomly selected from the study settings were directly interviewed to collect information on the social, economic, health insurance participation and knowledge of health insurance. Test χ2 was used to identify factors related to the participation in health insurance of the study subjects. Results:42.5% of respondents were covered by health insurance scheme. Factors related to their participation were the resident location (p = 0.042); gender (p = 0.004), age (p <0.001), chronic disease (p <0.001), economic conditions (p<0.001) and knowledge about health insurance (p <0.001). Conclusion: The rate of participating health insurance among study subjects was low at 42,5%. There was "adverse selection" in health insurance scheme among voluntary participating persons. Providing knowledge about health insurance should be one of solutions to improve effectively these problems. Key words: Health insurance, voluntary, Thua Thien Hue

scholarly journals The Effects of the Civility, Respect, and Engagement in the Workplace (CREW) Program on Social Climate and Work Engagement in a Psychiatric Ward in Japan: A Pilot Study

2021 ◽  
Vol 11 (2) ◽  
pp. 320-330
Author(s):  
Utako Sawada ◽  
Akihito Shimazu ◽  
Norito Kawakami ◽  
Yuki Miyamoto ◽  
Lisa Speigel ◽  
...  
Keyword(s):  
Work Engagement ◽  
Cross Sectional Study ◽  
Social Climate ◽  
Psychiatric Ward ◽  
Medical Doctors ◽  
Cross Sectional ◽  
Factors Affecting ◽  
Staff Members ◽  
Utrecht Work Engagement Scale ◽  
Healthcare Settings

Background: Good social climate and high work engagement are important factors affecting outcomes in healthcare settings. This study observed the effects of a program called Civility, Respect, and Engagement in the Workplace (CREW) on social climate and staff work engagement in a psychiatric ward of a Japanese hospital. Methods: The program comprised 18 sessions installed over six months, with each session lasting 30-min. Participation in the program was recommended to all staff members at the ward, including nurses, medical doctors, and others, but it was not mandatory. A serial cross-sectional study collected data at four time-points. Nurses (n = 17 to 22), medical doctors (n = 9 to 13), and others (n = 6 to 10) participated in each survey. The analysis of variance was used to evaluate the changes in the following dependent variables, the Essen climate evaluation schema (EssenCES), the CREW civility scale, and the Utrecht work engagement scale (UWES) over time. Result: We found no significant effects. The effect size (Cohen’s d) for EssenCES was 0.35 from baseline to post-installation for all staff members. Effect sizes for EssenCES for medical doctors and UWES for nurses were 0.79 and 0.56, respectively, from baseline to post-program. Conclusions: Differences in social climate and work engagement among Japanese healthcare workers between the baseline and post-installation of the CREW program were non-significant.

Fish Price Determination Around Lake Victoria, Tanzania: Analysis of Factors Affecting Fish Landing Price

2021 ◽  
Vol 22 (2) ◽  
pp. 348-363
Author(s):  
Damian Boniface Sambuo ◽  
Stephen Kirama ◽  
Kitala Malamsha
Keyword(s):  
Lake Victoria ◽  
Regulatory Body ◽  
Price Determination ◽  
Cross Sectional ◽  
Factors Affecting ◽  
Fish Market ◽  
Fishery Policy ◽  
The Government ◽  
And Performance

Determination of fish landing price is important, as the same contributes to the structure, conduct and performance of the fish market in Lake Victoria. Determination of relevant landing price is a gap to console between fishermen, agents (middlemen), processors and the government. The main objective of this study was therefore to examine fish price determination. Specifically, to examine the methods for fish price determination and analyse factors that affect fish landing price in Lake Victoria, a cross-sectional design was employed, and 300 respondents were randomly selected from two district councils, namely, Sengerema and Buchosa. Both qualitative and quantitative data were analysed using descriptive statistics and inferential analysis. Findings show that landing price is determined through formal negotiation with processors, consultation with other traders, informal negotiation with buyers and Beach Management Unit (BMU). The study concluded that these are the common methods used to determine landing prices. Also, distance from fishing to onshore landing centres, market information channels, age and experiences of the fishermen are the factors significantly found affecting landing price. It is recommended that the mechanism for setting up fishery price, fish market structure, fishery information and the formation of fishery regulatory body needs fishery policy and sector reforms that mark the determination of fish landing price.

scholarly journals Physicochemical factors affecting the wettability of copper mine blasting dust

2021 ◽  
Author(s):  
Longzhe Jin ◽  
Jianguo Liu ◽  
Jingzhong Guo ◽  
Jiaying Wang ◽  
Tianyang Wang
Keyword(s):  
Particle Size ◽  
Physicochemical Properties ◽  
Pore Structure ◽  
Total Pore Volume ◽  
Open Pit ◽  
X Rays ◽  
Factors Affecting ◽  
Copper Mine ◽  
Mineral Components ◽  
Hydrophobic Component

AbstractTo investigate the factors affecting the wettability of copper mine blasting dust, the primary blasting dust was collected from an open-pit copper mine and separated into hydrophilic blasting dust (HLBD) and hydrophobic blasting dust (HBBD) using water flotation method. The physicochemical properties of HLBD and HBBD were measured and compared with each other. The properties included particle size distributions (PSDs), micromorphologies, pore structures, mineral components and surface organic carbon functional groups. The results show that particle size and pore structure of the blasting dust are the main factors affecting its wettability. Specifically, particle size of HBBD is smaller than that of HLBD, and their respiratory dust (less than 10 µm) accounts for 61.74 vol% and 53.00 vol%, respectively. The pore structure of HBBD is more developed, and the total pore volume of HBBD is 1.66 times larger than that of HLBD. The identical mineral compositions were detected in HLBD and HBBD by X-rays diffraction (XRD); however, the surface organic hydrophobic component of HBBD is slightly larger than that of HLBD, this may be the reason for the poor wettability of HBBD. This study is significant to understand the effects of physicochemical properties of copper mine blasting dust on its wettability.

scholarly journals A Survey on Topics Rating for the Undergraduate and Diploma in Environmental Health

SAGE Open ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 215824401881104
Author(s):  
Kamaruddin Arshad ◽  
Qi Ying Lean ◽  
Long Chiau Ming ◽  
Sundara Rajan Mahalingam ◽  
Chua Say Tiong ◽  
...  
Keyword(s):  
Environmental Health ◽  
Survey Design ◽  
Health And Safety ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
High Exposure ◽  
Factors Affecting ◽  
Tertiary Institutions ◽  
Current Content ◽  
Level Of Importance

Environmental health (EH) is the study of environment and environmental factors affecting the health of human. Identifying the most relevant and up-to-date and updated teaching topics of EH programs is vital to ensure competent practitioners are nurtured. Thus, this study aimed to attain the view of current content of EH programs for EH professionals and intended to recommend topics necessary for education and practice. The level of importance of current and newly proposed topics for EH courses at diploma and bachelor’s level was assessed using a cross-sectional survey design. Practicing EH programs graduates were invited via social media and e-mails to participate in the survey. The respondents were asked to rank the importance of different EH topics based on 5-point Likert-type scale. Descriptive statistics were employed to report the importance of EH curricula at Malaysian tertiary institutions. It was found that between diploma’s and bachelor’s level, the bachelor’s graduates were expected to have high exposure in existing topics such as vector control management, legislation for EH and safety, health and safety risk assessment, as well as newly proposed topics including critical literature evaluation and innovation in creating awareness activities. The findings from this survey could serve as a guide to improvise EH curricula to ensure the EH programs continue to produce students with the necessary skills, knowledge, and competencies.

scholarly journals Public Response, Anxiety and Behaviour during the First Wave of COVID-19 Pandemic in Saudi Arabia

2021 ◽  
Vol 18 (9) ◽  
pp. 4628
Author(s):  
Amani Salem Alqahtani ◽  
Meshael Mohammed Alrasheed ◽  
Ada Mohammed Alqunaibet
Keyword(s):  
Cross Sectional ◽  
Protective Measures ◽  
Policy Makers ◽  
Factors Affecting ◽  
Public Response ◽  
Social Events ◽  
Phone Survey ◽  
Younger Age ◽  
Low Levels ◽  
The Government

This study aims to investigate public response attitude, anxiety, practices and trust in the authorities’ mitigation plan during the first wave of COVID-19 pandemic. A national cross sectional phone survey was conducted among Saudi residents aged 16 years and above. A total of 90,421 (45.2%) individuals participated in the study. Of those, the overall rate of COVID-19 correct knowledge was 82% (mean: 9.84); social media was the most reported source of knowledge. Younger age, low levels of education and foreign residents were associated with poor knowledge. Overall, 49.5% scored 5 or more on the GAD-7 test, indicating anxiety symptoms, 19.2% of them scored 10 and above, suggesting moderate to severe anxiety. Majority of participants (>78%) trusted and supported the interventions implemented by the government to control COVID-19. Social distancing practices among participants was as following, 72.5% stayed at home and avoid going out for nonessential business and 49.5% avoided attending social events and family gatherings. Trust in authorities, being anxious, worry and levels of knowledge about the disease, were the most common factors affecting adoption of the recommended practices. Continuous evaluation of public response about COVID-19, and the effectiveness of protective measures is essential to better inform policy-makers and identify ways of encouraging behaviour change among public during pandemic.

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