Cours Essay Example | Topics and Well Written Essays - 2750 words

Cours - Essay Example Reduced weight increases fuel consumption efficiency and reduces the amount of carbon compounds produced (Das 2001, 1). Reducing the weight of a vehicle by about 100kgs would lead to a reduction of about 0.3 to 0.4 liters of fuel per 100km (Yu & Dean 2006, 580). For example, the Ford Explorer model by Ford has a scratch resistance and corrosion proof cargo area made from integrated liners and side panels, reducing the vehicle’s weight by up to 20% compared to its conventional metal model. In addition, using composites makes it possible to reduce the number of parts required in fabrication of vehicles, compared to use of steel or aluminum (Calister 2007, 582). This leads to achievement of high volume composite concept in vehicle manufacturing, which leads to increased cost effectiveness. The use of natural based fibre has further improved fibre applications in the vehicle industry. Natural fibres are environmentally sustainable to use compared to metals. These fibres are proces sed from natural plants, making them biodegradable and environmentally friendly. Currently, natural fibres are mostly used in making of seat liners, equipment panels, carpets, among other applications in vehicles (Riaz 2012, 9). Natural fibres such as jute, sisal, hemp, and kenaf offer good acoustic properties to vehicles, high stability, less splintering in case of accidents, and reduced forging behavior compared to metals (Sanadi et al 1994, 469). Through the use of fibre reinforced composites, many parts of different shapes can be produced with much ease, and at high speed compared to use of metallic materials. The ability to configure and produce complex shapes inexpensively makes the use of polymers to considerably reduce the cost of a vehicle, making them more affordable to customers. Composites offer increased stiffness, toughness, and strength over structural metal alloys. These superior properties come along with vehicle

Research assignment Essay Example | Topics and Well Written Essays - 750 words

Research assignment - Essay Example The participants were randomly assigned to either the experimental group receiving BGL or the control group receiving DRL. In addition to the study participants with Alzheimer’s disease, a cohort group of participants consisting of family and caregivers of the light recipients were also controlled in the study. A two-group experimental design with repeated measures on one of the factors was used. The study qualitatively examined the effects on global function on people receiving blue-green light (BGL) and dim red light exposure (DRL) as perceived by participant caregivers. Interviews were conducted on the selected population. The interviews utilized open-ended questions since the exact response of the participants’ global function was unknown, and it is possible to miss facets of perceived change in global function. Demographic data was however not collected on the caregivers as they were not considered to be the focus of the research (Nowak and Davis, 2011). The study took the form of four stages. Stage one included selecting and screening and support and educated assent from restorative sheets in the territory, family, and guardians eager to take part in the study. The second stage included gathering of benchmark information on the slumber and daytime languor for all chose members. The third stage included randomizing members to either the BGL or RDL treatment where light was controlled for 14 back to back days in 30 moment morning sessions. Stage four included gathering of post-test information from the first day after fruition of the light treatment for five sequential days. Wrist actigraphs were utilized to gauge rest attributes and daytime drowsiness all through all stages (Nowak & Davis, 2011). In the analysis of the sleep data the authors used frequency and percentage distributions, means, and standard