Tuesday, 12 January 2021

Engineering Journal: December 2020

Engineering Journal: published its volume-6, Issue-12, December 2020 with AD Publications

Detection of Xyelene (C8H10) by Pd-gate MOS Sensor

Abstract— A sensor based on Pd/SiO2/Si MOS capacitor was fabricated on p type <100> (1-6 ΩCm) Si with thermal oxide layer of thickness about 200 A˚. The sensor showed sensitivity to Xyelene (C8H10 ) vapour and was characterized at Xyelene concentrations ranging from (500ppm-16,000ppm) at different operating temperatures (room temperature,70˚C and 120˚C), in air. It was found that sensitivity of the sensor was maximum at an operating temperature of 70˚C.

Keywords— MOS (metal-oxide- semiconductor) structure, gas sensor, Palladium (Pd), sensitivity, C-V and G-V characteristics.

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Trimaran Fishing Vessel Development: A Review of Vessel Power, Safety and Comfort Needs

Abstract In general, fishing fleets operating in Maluku waters and managed by local entrepreneurs consist of mono hull fishing vessels (such as purse seines, etc.) and trimaran in chart form. These two types of fishing fleets have been known to the people of Maluku for a long time. However, these two types each have their advantages and limitations, for example, mono hull fishing boats have limited deck space and poor transverse stability, especially in bumpy sea conditions in extreme weather. While the trimaran type has better deck space and transverse stability than a mono hull ship, but because it is still in chart form, it has limited space. The shortcomings that exist in these two types of fishing fleets are coupled with the expertise or experience of fishermen which has minimal impact on the decrease in the catch and what is worse can be fatal to accidents and the sinking of ship arma. To increase the catch of fisheries, it is necessary to have a means and a reliable fishing fleet. This study aims to examine the development of trimaran fishing vessels in terms of the study of energy needs, safety and comfort for the captain and crew during fishing operations. The initial stage of this research begins with data analysis and the principal size of mono hull fishing vessels operating in Maluku waters, from this data the hull form of a trimaran vessel is designed with an area similar to or close to the area of ​​a monohull fishing vessel operating in Maluku waters using maxsurf, then analyzed the calculation of obstacles. ship and stability to assess the energy needs and safety and comfort of the ship during fishing operations. This research is focused on analyzing the energy requirements, safety and comfort of the trimaran fishing vessel. The final result of this research is expected to be used as an alternative fishing boat to increase the fish catch of fishermen which will have an impact on the income and welfare of fishermen.

Keywords Trimaran Fishing Vessel, Resistance, Power, Safety, Comfort.

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Effect of Citric Acid on Thickeners Used in Products for People Suffering Oropharyngeal Dysphagia

AbstractDysphagia is a digestive disorder recognized by the World Health Organization (WHO) in the International Classification of Diseases (ICD) characterized by the difficulty in forming or moving the bolus from the mouth to the oesophagus that can cause the passage of food into the respiratory tract. Foods for people with dysphagia are prepared with products that modify viscosity to make them safer when ingested. The aim of this work is to establish the interaction between citric acid, widely used by the food industry, with different thickeners, both first and second range, in order to check whether they fulfil the functions for which they have been designed. The time stability and viscosity as a function of the hydration time of six thickeners and their behavior in the temperature range between 25 and 50 °C were determined. Thickener concentrations up to a maximum of 6% were used in combination with 3acid concentrations (0.5, 1 and 2%). In distilled water, the sedimentation of first range thickeners and the gelification of second range thickeners were checked, as well as the change from non-Newtonian to Newtonian behaviour after the hydrolysis process in both types of thickeners. In the presence of citric acid, the behaviour of both types of thickeners was analogous. Second range thickeners have been found to be much safer than first range thickeners in modifying the viscosity of liquids for people with dysphagia due to the fact that they do not sediment.

Keywordscitric acid, dysphagia, gum, starch, thickener, viscosity.

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Impact of France Nuclear Tests on typhoons and Earthquakes in November 1990

Abstract The paper investigates the relationship between the development of typhoons and strong earthquakes after the France nuclear tests (NT) in November 1990. It is shown that after the NT acoustic impact on the tropical disturbance of the Pacific Ocean cloud structures self-organized into a system of three interacting category 5 typhoons. The dependence of the earthquakes M> 4.6 and the intensity of these typhoons as well as Typhoon Mike which passed earlier through the Philippine Islands are considered. Areas were found where the impact of typhoons led to earthquakes M> 5.4 of small lithospheric plates.

Keywords Pacific, nuclear test, typhoon, earthquake.

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