Composite material

Concrete was invented in the late 3rd century BC. It was a powerful cement derived from pozzolana, and soon supplanted marble as the chief Roman building material and allowed many daring architectural schemata. Also in the 1st century BC, Vitruvius wrote De architectura, possibly the first complete treatise on architecture in history. In late 1st century BC, Rome also began to use glassblowing soon after…

Manetho describes him as a great warrior, not surprisingly, because he also says he was "of great height at 4 cubits, 3 palms and 2 fingers". In addition, he may also have been the model for the Sesostris of Maetho and Herodotus, who was probably a composite, heroic Middle Kingdom ruler who was suppose to be a model for future kings .He is also noted for his military achievements. He mounted four campaigns into Lower Nubia, where he confronted the powerful kingdom of Kush, based at Kerma in the…

scrambled for any way to reduce the impact. The demand for newer, cleaner planes encouraged NASA and leading aerospace companies to tackle a series of technological improvements that would dramatically improve fuel saving. Among other projects, composite airframe materials, APET, and wingtip winglets received significant attention and still could be seen in today’s most advanced passenger aircrafts. It is intriguing to see how high operating cost brought by rising fuel cost could persuade…

2. Materials and Methods: The keratin was extracted from Chicken feather which were collected from the local market of Raipur (21.14°N 81.38°E) Chhattisgarh, India. The 91% food grade alginate (sodium salt form) was purchased from Loba Chemie. The β-mercatpoethanol (mol. wt. 78.13) from LOBA Chemie, sodium dodecyl sulfate (SDS) (mol. wt. 288.38) and urea (mol. wt. 60.06) was purchased from Merck, and ethanol was purchased from Sigma-Aldrich. Antimicrobial strain of gram negative bacteria…

In both cases, Refresco use what they call processing model where the inputs or resources to be transformed undergo a process of transformation that results in outputs. The entries generally are materials that are processed or whose physical properties remain unchanged, such as oil and electronic components; information, which will have its informative property transformed, such as a report, dollar rate, financial analysis and also the consumers themselves…

behaviour of 273 pulpotomies with a long term follow up ranging from 1-29 years. The pulpotomies were preformed by a single operator on patients between the age of 8 to 79 years at the time of procedure. Pure CaOH powder was used as the pulp capping material in all cases. Periapical and bitewing radiographs were taken before the undertaking of any treatment. The percentage of success rates were as follows: 1 year: 82%, 2 years: 83%, 3 years: 81%, 4 years: 76%, 5 years 75% and 10 years 63%. There…

Anthropology, the study of humankind, has four main branches: Cultural Anthropology, Archaeology, Linguistic Anthropology and Physical Anthropology (Larsen 2014). Physical Anthropology focuses mainly on uncovering the mysteries of human evolution by studying fossilized bones of ancient humans and primates to determine their place in our family tree and study what circumstances led to the evolution of the modern human (Larsen 2014). There is a specialty within Physical Anthropology called…

Ancient Mesopotamia was home to many artistic and mechanical developments. This was due to the emerging civilizations in the fourth millennium BCE. Among these creations, archaeologists discovered musical instruments, which were carefully crafted by Sumerian artists. One of the most acclaimed artifacts from ancient Mesopotamia is the Bull-Headed Lyre. The discovery of the Bull-Headed Lyre has reinvented the way that history professionals evaluate early human civilization. Conducting a visual…

shells as infinitely rigid in the transverse direction by neglecting transverse strains. The theory underestimates deflections and stresses and overestimates natural frequencies and buckling loads. Since the transverse shear moduli of advanced composite materials are usually very low compared to the in-plane moduli, the transverse shearing strains must be taken into account for an accurate representation of the response of laminated plates and shells. Numerous plate and shell theories which…

General Memory and General Recognition was noted. Although, memory was weak across modality the impairment was more pronounced and significant on the visual tasks. Retention was maintained on word list task, which supports ability to learn verbal material with…