In robot design and application the force and angle with angular speed is important so this study will model numerical simulation and discuss detail data to investigate their property. The force may increase as arm 1 angle increases whilst it may increase if angular speed increases in three freedoms. Meantime it will decrease if angular acceleration increases. It is found that with the angular speed increasing all three forces may increase whilst the angular acceleration will cause its increase too in five freedoms. From this value it is observed that F2 is prior one to ensure the strength and fatigue life then F2 is second one to estimate its strength whilst F3 may be neglected. The force may increase as arm 1 angle increases whilst it may increase if angular speed increases in three freedoms. Meantime it will decrease if angular acceleration increases. There is big distance to attain 5KN between the conditions. The effective factor turn to the force is F1>F3>F2 in three freedoms. The force may increase from 15N to 15KN and 18KN with F3, F2 and F1 in five freedoms. Among them F3 is the least one and F1 is the biggest one. The effect factor turn is F1 >F2 >F3. so the F1 and F2 is important one while F3 is neglected.

The causes of flooding from rainwater and wastewater in Vietnamese cities are usually: inadequate drainage system; the original design did not match; runoff coefficient in drainage basin increases due to change of cover surface; leaking water supply pipe; clogged drains, sediment; damaged drainage works; incidents at pumping stations to drain rainwater and wastewater; due to climate change leading to increased rainfall and irregular urban hydrology, sea-level rise, etc. Therefore, the selection of hydrological and hydraulic models applied in urban drainage is necessary to study and apply scientific and technical advances in the field of drainage including hydrological analysis, network hydraulics drainage and propose effective drainage solutions for new planning and upgrading areas.

The new industrial arrangement includes the traditional, high technological and service industries. It can be concluded in that service one is the most competitive, promise and future. And then high technological has been central for the development of new industries. However the automobile is also important industry for transporting. In the meantime the infrastructure has the potential need. Computer industry it has been a high technological project to proceed in future. Particle and quantum computer is a promise project. It can promote the chip applied to other AI products like robot and driverless auto etc. As ocean engineering like sea water desalination & tidal power generator and nuclear power station they are made in order to obtain renewable and clean energy source. The three respects construct the new industrial degree in Africa, therefore we should make a whole plan to it and establish a series of content to consider and make a decision for future. Currently we must emphasize its plan and content in details then after reviews these content should be realized, which is our final destination. Besides, the huge ocean has potential power for us to use so that like tide power generator needs to review and prepare to make a reservoir so as to check whether to realize it. If it is satisfied with test we can fix this engineering to seashore for electricity and heat because it can be rotated same with two sides. Using this device may be available through potential energy of tide water.

The samples of seawaters were collected during winter 2019 and summer 2020 from coasts on Red Sea at Al Hudaydah Governorate to understand the distribution of nutrients and the dynamics of the microbiological component with special reference to bacteria and find out the relationship between phsicochemical characteristics and microbiological components. The samples of nutrients (NO3-, NO2-, PO4-3, SiO4-4) were measured using spectrophotometric techniques (DR 3900, HACH, USA). The variation of the nitrates was lower during summer and higher during winter, due to the high temperature, which increases the photosynthesis process and thus the increased consumption of nitrate by phytoplankton growth. The variation of the NO2 were less in summer and high in winter due to the high temperature, which increases the photosynthesis process. Seasonally, the high levels of phosphate in summer compared to winter because the increase the household water discharges containing high concentrations of soap and detergents. Factors analysis indicates that, the strong positive loadings of PO4, TC. It is clear from the table (2), that the discharged water to the marine environment is characterized by a very high load of organic matter and coliform bacteria, and this is clear from the relationship between BOD and all the parameters.

The Africa has huge potential resource along their coastline. So if the sea energy may be utilized by us that will bring us huge power resource. The new mechanism may be formed correspondingly in terms of establishing new and renewable energy source. Therefore it shall be planned and proposed new mechanism to fit to. A series of innovative creation is needed to transform it with corresponding mechanism in order to establish complete industrial construction. On the other side the sea green energy owns huge potential so we shall wield them for our green energy. Sea water desalination and tidal power generator has owned these conditions. If we use reasonable the resource we may acquire our destination completely.

In this research work, a blend of cassava peel and water hyacinth were co-digested to generate energy through biogas production. A 0.030 m3 anaerobic digester was used to digest 55 kg of the blend of cassava peel and water hyacinth. The ratio of mixture of cassava peel to water hyacinth was 3:1. The mixture was properly ground, mixed and charged into the mild steel digester under mesophilic slurry temperature range of 32 oC to 37 oC. The results obtained showed that a minimum pressure reading of 148.438 kPa and a maximum pressure reading of 170.659 kPa were obtained. This suggests sufficient microbial activities in the digester, thus, good biogas production. The analysis of biogas yields showed that an average of 0.005148 m3 of biogas was generated and this gives an average of 0.0121 kWh of electricity.

Viability of African pear seed-oil as a potential feedstock for biodiesel was examined in this work. The yield of the extracted oil was 59% of the total seed. Gas-chromatographic analysis of the oil extract showed that the oil was predominantly constituted by mono-unsaturated fatty acid (oleic acid, 76%) while the total percentage of its saturated fatty acids was 24% 6.1%, stearic acid, 7.5% and others, 10.4%). Pre-treatment of the oil extract with 1% w/w H2S04 showed tremendous reduction in the free fatty acid from 12.33+0.05 to 0.10+0.02 mg KOH/g. Biodiesel yield of the seed oil attained optimum yields at the methanol/oil molar ratio of 7:1, catalyst concentration of 1.00%, reaction temperature of 60°C, agitation speed of 850 rpm and effective contact time of 120 min. However, the yields of the biodiesel were higher at these experimental conditions with homogeneous KOH catalyst than its NaOH counterpart. Fuel properties such. As smoke point, flash point, fire point, viscosity and specific gravity exhibited by the biodiesel of African pear (D. edulis) were found comparable with those of the petrol-diesel, and the values also fell within the acceptable limits of ASTM and EN standards.