Application of impact energy absorption systems in different industries is of special significance. Thin-walled tubes, due to their lightness, high energy absorption capacity, long crushing length and the high ratio of energy absorption to weight, have found ever-increasing application as one of the most effective energy absorption systems. In this research, through  carrying out experimental t...

Nutrient adequacy in the diet is of paramount importance to physical and mental health. The aim of this study was to characterize the dietary pattern associated with a low energy density diet and determine its nutrient adequacy in elderly men and women. The subjects were men (n = 1150) and women (n = 1094) >65 y, examined in 2 population-based cross-sectional surveys (2000 and 2005) in northeas...

one of the purposes of ecotourism is to relax and aspirate the natural energy. sacred and energetic sites are the locations for experiencing the relaxation. since 2005 the ecotourism for aspirating the natural energy or spiritual ecotourism has been developed in iran. there are some places in iran which have a kind of energy as subtle energy for increasing personal health and awareness. these p...

     In this study, the effect of the secondary structure of the protein on the acid strength of three structures of random (R), alpha helix (α) and beta sheet (b) were investigated theoretically. These structures are related to the cationic amino acids of histidine and lysine in the polypeptide chain of eight-glycine residue. Computational methods at the HF, B3LYP, X3LYP and M05-2X levels in t...

The present study was conducted to investigate current density of0.3 0.7 Al Ga N/ GaN multiple quantum well solar cell (MQWSC) under hydrostaticpressure. The effects of hydrostatic pressure were taken into account to measureparameters of 0.3 0.7 Al Ga N/ GaN MQWSC, such as interband transition energy, electronholewave functions, absorption coefficient, and dielectric con...