Constant head permeability Lab Report Example | Topics and Well Written Essays - 1000 words

Constant head permeability - Lab Report Example Permeability as defined above is the capacity of sample of soil to allow the passage of water through it. It is also referred to as hydraulic conductivity. The coefficient of permeability is the velocity of flow that is generated by the hydraulic gradient of unity as stipulated by Darcy’s law which is given by the formula: 6. The tamping device is then used to compact the soil layer. About 10 rams per layer are recommended in order to provide a uniform coverage of the surface of the soil. The process should be repeated until the soil layer is within the range of 2 cm. 10. The bottom of the outlet valve is opened and raised to a given height in order to achieve a reasonable steady flow of water. Enough time should be allowed for the pattern of flow of the water to stabilize. 11. The time taken to fill a volume of 750-1000 ml using the graduated cylinder and the temperatures of the water recorded. This process is repeated three times and the average time, volume and average temperature computed. From the foregoing, it is clear that the value of the coefficient of permeability has been determined using the constant head test and found to be 0.2333 cm/s. as indicated earlier that the constant head test is appropriate for permeability’s of soils where k>10 – 4 cm/s, this has been proven to be consistent with the results obtained. Constant Head Permeability Test in Sand, University of Texas at Arlington Geotechnical Engineering Laboratory Test Procedure. Retrieved from: http://www.uta.edu/ce/geotech/lab/Main/Soil%20Lab/08_Permeability/permeability_lecture%20note.pdf. Accessed on 15th April

Patient Internet Guide Essay Example | Topics and Well Written Essays - 500 words

Patient Internet Guide - Essay Example This research is being carried out to evaluate and present some useful advices which would help to learn more about a medical condition through online search: Preferably, the site must be sponsored by a medical institution, organization or association. There is a high probability that medical professionals are behind the content of such sites. An example of which is Mayoclinic.com. Avoid sites that look shabbily presented. Good sites invest money, effort and time to establish impact and credibility to the readers. As much as possible, the site must be a registered domain and not just a simple blog that can disappear anytime. Check the site’s domain name and standing in Better Business Bureau. The site must have a disclaimer stating that the information presented is not in any way a substitute for medical advice. Never give your personal information unless the site can be trusted. More importantly, the site must ensure that your personal information would not be shared. Search for forums where people give feedback about certain sites. User experience is a reliable way to get good comments or criticism about a certain site. Avoid forums that have members arguing all of the time. Remember, you need information not arguments. The site must present valid source of references for their journals or articles. Sites with peer-reviewed journals are highly preferable.