Phase Change Materials (PCMs) are capable of reducing the thermal load transfer rate between outdoors and indoors and maintain stability in the indoor temperature when used in building applications. In this study, a variation of layers of two Bio-PCMs integrated with layers of general construction material and insulation have been analyses discretely as well as in combination. The observations from various models have been compared to draw the result and perceive the best model of a Bio-PCM wall for constructing thermally efficient buildings. The wall models have been created and analyzed through Computer Aided Design (CAD) modeling and simulation techniques using Transient Thermal module in ANSYS software. Coconut fat and Palm fat being highly efficient and easily available Bio-PCMs, are used in this study and attractive results have been obtained from them.
Background: Dentist sits in a chair and leans forward towards the patient, lumbar curve flattens and the bony infrastructure provides very little support to the spine. Sitting in chair forces the hamstrings to become inactive and places them in a shortened position. Repetitive, prolonged sitting eventually leads to hamstring muscles that adapt to a new shortened length, and the result is Hamstring tightness which induces posterior pelvic tilt and decreased lumbar lordosis, which can result in low back pain.Objective: We investigated effects of hamstring stretch with pelvic control on pain, disability and work ability in Dentist with mechanical low back pain.Methods: Thirty Dentist from Dental professional were randomly assigned to pelvic control hamstring stretching (Group A) (n = 15) and Supine hamstring stretching (Group B) (n = 15). All interventions were conducted 3 days per week for 6 weeks, and included in the hamstring stretching and lumbopelvic muscle strengthening.Outcomes: Outcomes were evaluated through Numeric pain rating scale (NPRS) for Pain, Oswestry disability index (ODI) for Disability, and Work ability index (WAI) for Work ability.Results: The paired t-test was used to compare within group differences and unpaired t-test was used to compare the between group differences. All statistical analyses were performed using SPSS statistical software version 21.Significant differences found between Group A and group B in all three variables.(p<0.05).between pre and posttest of subjects. According to the results of the present research, it could be concluded that for reducing pain, disability and improving work ability in dentists pelvic control hamstring stretch and lumbopelvic strengthening exercises are recommended.
Conclusions:The pelvic control hamstring stretch exercise would be more helpful in back pain reduction and improvement of work ability in Dentist with mechanical low back pain.
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