an enhanced displacement feedback structural control procedure is presented for performance-based design in this paper. at first, a comparative study is implemented assessing three most common active control algorithms including state, acceleration, and displacement feedback controls. the advantage of the displacement feedback algorithm for active control of structures against earthquakes is de...

hemoglobin is a porphyrin containing protein with an a2b2 tetrameric structure and like other porphyrin compounds shows spectral behavior of species specific characteristics. researchers tend to relate bands in the hemoglobin spectra to certain structural and/or functional features. given the fact that hemoglobin is the main oxygen carrier in animals functioning through the oxy«deoxy equilibriu...

in this research, a semi empirical approach has been suggested for calculating the activation energyof unimolecular thermal decomposition of vinyl ethers yielding saturated products. the calculationprocedure is based on the use of molecular mechanics (mm) methods. these methods which involvethe construction of the transition state for a molecule mainly consider the formation of a “hydrogenbridg...

background an absolute prerequisite to the effective management of dementia is its early diagnosis. successful dementia screening requires precise and sensitive instruments that can be completed even by illiterate elderly people. objectives the aim of this study was to evaluate the psychometric properties of the persian version of the cognitive state test (cost). materials and methods this meth...

objective: the objective of this study was analyzing the effect of meta-cognition elements on depression, trait and state anxiety symptoms.  methods: in this study, the sample consisted of 224 students of university of social welfare and rehabilitation sciences that answered three questionnaires including metacognitive questionnaire (mcq-30), beck depression inventory (bdi-ii) and spielberger s...

using the lennard-jones (12-6) potential, a new equation of state is obtained that can predict properties of both gases and liquids relatively well. this equation of state is given as (z-a)v2=(a/v2)-b, where z is the compressibility factor, a and b are constants, and a is an adjustable parameter that depends on the temperature, volume and the nature of the fluid, and its expressions depends upo...

a diverse range of foods has been shown to increase energy and micronutrients intake in the developing countries. it is widely asserted in the literature and development circles that farm household access to irrigation dam can provide a significant improvement of household’s dietary diversity. this study set out to assess the role of kampe irrigation dam on farm household dietary diversity in k...

a solid state fermentation method was developed for the production of citric acid from date pulp (obtained of date syrup production from the process) by aspergillus niger ptcc 5010. poor yield was obtained when potassium ferrocyanide treated date pulp were used as substrate, but methanol at a 3-4% concentration markedly increased the forma-tion of citric acid from the waste. the optimum range o...

in this report, we present a facile approach for the synthesis of luminescent cds and cds:mn+2 nanocrystals by reaction of cdso4 and na2s2o3 in the presence of thioglycerol (c3h8o2s) as capping agent. the influence of various experimental variables including, ph values and percentage of dopant, on the growth rate and optical properties of the obtained cds nanocrystals has been systematically in...