Food insecurity caused by decline in food production due to shortage of workforce, has necessitated the automation of the various agricultural operations. The study was aimed at the design and development of a prototype drip irrigation robotic system, which used the internet services for its operation (Internet of Things). The robot has a microcontroller, soil moisture and temperature sensors and a water pump. During operation, the robot received the input commands through the soil temperature and moisture sensors. It had the ability to deter the water requirement of the targeted crop, before irrigating it autonomously with the right volume of water. Performance evaluation of the robotic system revealed that it had an efficiency of about 90% and accuracy of about 95% when controlled through the internet. This prototype will help in the production of automated drip irrigation robots, that will preformed effectively in the field.

The torque will be in proportion to the crank and linkage length. That may be fitted to the stroke ratio γ well. The bigger the γ is the bigger the torque is. The crank acceleration and block angle will be low when the γ becomes big. The linkage acceleration and speed may incline as the stroke ratio and rotation is big. The movement will be big when the stroke ratio is small and the rotation is inclining on the crank linkage mechanism in vehicle

Through comparing China with America the difference of science and technology may be found. In the scientific front field the America has leading role but in the base field China maintains leading role. It is known that China has grown from big country to strength one in science and technology. The population in China is a difficult problem since the average GDP(gross domestic product) may be not too high level. So the endeavor must be done more in order to promote average one. In the military China has two aircraft carriers to proceed in near sea to protect abroad ones and territory integrity even Taiwan unification. MBA (master of business & administration) is prevail course for senior business and economy administration which may be a good merger of technology and administration.

Environmental pollution caused by conventional building material, had given borth to treh quest for green technology. This work evaluated the impact of cassava starch on some structural properties of sandcrete blocks produced from recycling paper. The sandcrete blocks were produced by replacement of river bed sand (sharp sand) with waste paper, at the rate of 10%, 20%, 30%, 40%, 50% and 60% partial replacement; while the 1% of the cement was replaced with cassava starch powder. All the sandcrete blocks were produced at a fine aggregate to cement mix ratio of 6:1. The compressive strength, bulk density and water absorption rate of the blocks produced were dome at 28th curing day. Results obtained from the compressive strength test depicted that, regardless of the paper pulp volume, the blocks produced with cassava starch had higher compressive strength, compared to the blocks produced without cassava starch. At curing day 28, the blocks produced 10% and 20% paper pulp and cassava starch, developed compressive strengths of 2.65 N/mm2 and 2.32 N/mm2, respectively. In terms of the bocks bulk density, the result portrayed that the weight of the blocks produced with paper pulp were lighter, when compared with the control unit. It was also revealed by the results that the block containing cassava starch power had lower water abortion rate, compared to block produced without cassava starch. This study results had shown that using cassava starch as admixture, paper pulp can be used to produce sandcrete blocks for building walls of a framed structure at a little quantity (1% - 20% partial replacement).

This paper compares the biogas ignition time from 8 kg cattle dung, 4 kg each of cattle dung and cassava peels, and 4 kg cattle dung with 4 kg plantain peels. Digesters with 1 m diameter, 0.75 m height and 2 mm thickness made of mild steel were used for the anaerobic digestion of the three substrates in a mesophilic environment. The substrate was charged to the digester after thorough mixing with water at 1:2 by mass. The biogases were daily tested for combustion. Temperatures and pressures of the digesters were monitored at 10 am and 4 pm daily with mercury thermometers and pressure gauges installed on them. The biogas from every digester was measured by water displacement approach. The cattle dung biogas ignited on the 14th day, cattle dung with cassava peels mixture on the 55th and cattle dung with plantain peels mixture, 146th day of digestion. Their biogas volumes were 6450, 7000 and 6500 ml. Bacteria identified on the three digestates were Clostridium spp. and Bacillus licheniformies with a population of 2.5 x 10-4, Pseudomonas spp. and Bacillus licheniformies 3.8 x 10-4, and Bacillus licheniformies with 2.3 x 10-4 cfu/ml. Cattle dung biogas recorded the least ignition time.