Dissolved oxygen (DO) is considered as one of the most important aspect of aquaculture. It is needed by fish to respire and perform metabolic activities. Thus low levels of dissolved oxygen are often linked to fish kill incidents. On the other hand, optimum levels can result to good growth, thus result to high production yield. To increase pond production it is necessary to control dissolved ox...

During the past decade, pond aeration systems have been developed which will sustain large quantities of fish and invertebrate biomass. Dissolved Oxygen (DO) is considered to be among the most important water quality parameters in fish culture. Fishponds in aquaculture farms are usually located in remote areas where grid lines are at far distance. Aeration of ponds is required to prevent mortal...

The analysis sensitivity of strength, rigid and dynamic characteristics the console rotor to variation design parameters in paper describes speed rotation shaft, material impeller vary. dependences radial axial displacements on angular velocities modulus elasticity are established. For objects type rotary systems with a cantilever arrangement impeller, not one, but set criteria has been introdu...

A huge number of workers are employed in traditional rice mills where they are potentially exposed to dust. In this study a dust collection system was developed to capture the airborne dust in the rice mill. The feeding and sieving section of the mill was identified as major dust creating zone. The dust was captured by creating suitable air stream at feeding and sieving sections of the mill and...

Abstract In new energy vehicles, due to the loss of traditional engine noise source coverage, air conditioning blower has become main noises. this work, simulation radius volute tongue (R), gap tongue(d), blade outlet angle (β) and profile(A) were conducted obtain influence degree each parameter on aerodynamic efficiency blower, numerical methods which verified by experimental test. A global se...

A major problems in the operation of laptop computers is overheating since it can affect the performance and stability, sometimes leading to system crash and hardware fatality. The objective of this work was to study the thermal behavior inside a laptop computer and to test the effectiveness of aproposed cooling method to overcome overheating problem. The proposed cooling system contained a the...

When a patient is unable to breathe or maintain their airway they will most likely be ventilated by a bag-valve-mask. We propose to replace the traditional bag-valve-mask with an electric blower ventilator. This handheld feedback controlled device will automatically compensate for mask leak and enable the clinician to deliver computer controlled respiratory rates and tidal volumes. We have buil...

Vibrations of rotor systems are largely determined by elastic characteristics supports. In the general case, dependence displacements on force for such supports is nonlinear. This applies to bearing various types. addition bearings, elements also used in systems. They designed change overall stiffness The paper analyzes radial flexible ring dampers For this, two main approaches proposed. first ...