An Efficient Control Strategy for an Optimal Operation on Clear Water Process Station

Water process stations are very common nowadays, that can be noticed everywhere from a small house to very big industrial area. The main objective of the water process stations are to reduce the hardness of the drinking water. In order to attain such a clear drinking water, the process station will work over several stages like sediment filter, carbon filter and RO membrane. Usually all these stages will be taken into account by the process stations on the feed water irrespective on its hardness measurement. The control strategy imposed in the paper verifies the hardness of the feed water at the very first step to avoid several stages for making the process simpler and faster. In the same way, at the stage of each filtering process huge amount of water will be wasted in the traditional process station. Due to the implementation of an efficient control strategy such wastages can also be minimized in the proposed work. The experimental study performed based on the proposed methodology explores the amount of water saved during the clear water processes as well as the time requirement for processing the feed water.

COVID-19 Stressors on Migrant Workers in Vietnam: Cumulative Risk Consideration

This study explored the impact of COVID-19 on migrant workers in Vietnam, using a cumulative risk assessment (CRA) framework which comprises four domains (workplace, environment, individual and community). A cross-sectional study was conducted. Data were collected in 2020 through a self-administered questionnaire with 445 domestic migrant workers in two industrial zones in two northern provinces (Bac Ninh and Ninh Binh) in Vietnam. The majority of migrant workers were female (65.2%), aged between 18 and 29 years old (66.8%), and had high school or higher education level qualifications. Most migrant workers had good knowledge about preventive measures (>90%) and correct practices on COVID-19 prevention (81.1%). Three health risk behaviors were reported: 10% of participants smoked, 25% consumed alcohol and 23.1% were engaged in online gaming. In terms of workplace, occupational working conditions were good. Noise was the most commonly reported hazard (29%). Regarding environment, about two-thirds of migrant workers lived in a small house (<36 m2). Most participants (80.4%) lived with their families. About community domain, many reported low salary or losing their job during January–July, 2020. Most migrants received information about COVID-19. The migrant workers suffered from poor health and low occupational safety, fear of job loss and income cut, poor housing and living conditions and limited access to public services. The holistic approach to address stressors is recommended to improve health and safety of migrant workers.

Why Constructive Resilience?

I was born in a small house that had been built by my uncles on a rocky and barren piece of land that my grandmother acquired by saving the meager wages that she earned cleaning White folks’ houses in North Carolina. Since the land was not fertile, we could not grow upon it anything to eat. In addition, because the land was not yet connected to the city, there was no running water, no electricity, and no inside toilet. We went to the bathroom in an outhouse located down the road.....

Right to Health: Polygyny and De Facto Polygyny may Increase Women’s Vulnerability to HIV/AIDS in Tanzania

The world continues to faced many challenges both social and economic as a result of HIV/AIDS. Women in Tanzania and the world at large are among the most vulnerable population to HIV infection. Some of the communities to this day are starved of the critical information about the scourge as a result of the contradictions which emerge between the national laws (i.e., customary law) and international laws. This study aimed primarily at ascertaining the issues of whether polygynous marriage/small house are perceived to expose married women to the high risk of HIV/AIDS. Simple random sampling technique was used to select rural and urban married men/women, especially among those living in polygamous and monogamous marriages and unmarried women who are in relations with married men (small house) at Lushoto in Tanzania. The study noted that married women are at risk of HIV/AIDS when their husbands practice de facto polygyny. As a result of the legal disparities between international laws and national law (i.e., customary law), polygynous marriage/small house exposes married women to a high risk of HIV/AIDS. The international community needs to come up with a standpoint that compels member nations of different cultural practices to ensure that women are not exposed to HIV/AIDS. HIV/AIDS is a reality and dissemination of information to all people should be considered a human right regardless of the different cultural practices. To this end, thousands of married women in polygamous and monogamous marriages are at risk of the scourge in Tanzania in particular and the world in general. The world continues to faced many challenges both social and economic as a result of HIV/AIDS. Women in Tanzania and the world at large are among the most vulnerable population to HIV infection. Some of the communities to this day are starved of the critical information about the scourge as a result of the contradictions which emerge between the national laws (i.e., customary law) and international laws. This study aimed primarily at ascertaining the issues of whether polygynous marriage/small house are perceived to expose married women to the high risk of HIV/AIDS. Simple random sampling technique was used to select rural and urban married men/women, especially among those living in polygamous and monogamous marriages and unmarried women who are in relations with married men (small house) at Lushoto in Tanzania. The study noted that married women are at risk of HIV/AIDS when their husbands practice de facto polygyny. As a result of the legal disparities between international laws and national law (i.e., customary law), polygynous marriage/small house exposes married women to a high risk of HIV/AIDS. The international community needs to come up with a standpoint that compels member nations of different cultural practices to ensure that women are not exposed to HIV/AIDS. HIV/AIDS is a reality and dissemination of information to all people should be considered a human right regardless of the different cultural practices. To this end, thousands of married women in polygamous and monogamous marriages are at risk of the scourge in Tanzania in particular and the world in general.

The Effect of Methane and Carbon Dioxide Ratio in the Biogas to the Fuel Consumption of 2 Stroke Single Cylinder (63 cc) Engine of 750 Watt Electric Generator

The 2 stroke single cylinder (63 cc) engine of 750 watt electric generator is very popular in the application because providing enough amount of electricity for small house hold with compact size, light weight with reasonable price. Usually this type of electric generator is fuelled with gasoline that mixed with oil as lubricant. The cylinder volume of the engine is usually around 63 cc. This type of engine can be fuelled with biogas with addition component to mix biogas together with air and lubricant, and set the compression pressure at 10 bar. Biogas mainly contain methane (CH4), carbon dioxide (CO2), moisture (H2O), and hydrogen sulfide (H2S). The CH4 is combustible gas and can be used as a fuel for internal combustion engine. Moisture and H2S are easily removed from biogas. To remove CO2 from biogas is about difficult and costly, therefore acceptable content of CO2 in the biogas should be investigate related with the fuel consumption. This research is conducted to understand the influent of ratio CH4 and CO2 in the biogas to fuel consumption of the 2 stroke single cylinder engine of 750 watt electric generator. The variations ratio of CH4 and CO2 were obtained from anaerobic digester with batch system. The results indicate that the CH4 and CO2 ration in the range 1.667-1.967 will yield optimum efficiency that reach biogas consumption in the range of 9.1-9.8 liter/minute.