Theoretical and Experimental Research of Spherical Roller Transmissions

Terror management theory: Theoretical concepts, experimental research and Critics

Terror management theory (Greenberg, Pyszczynski & Solomon, 1986) considers the desire for survival as the underlying motivation for human behavior. Given his cognitive capacity and ability to think abstractly about the future, man realizes that his death is inevitable, which causes Paralysing terror. Man has developed certain psychological structures to protect himself from this terror. A cult...

the study of practical and theoretical foundation of credit risk and its coverage

پس از بررسی هر کدام از فاکتورهای نوع صنعت, نوع ضمانت نامه, نرخ بهره , نرخ تورم, ریسک اعتباری کشورها, کارمزد, ریکاوری, gdp, پوشش و وثیقه بر ریسک اعتباری صندوق ضمانت صادرات ایران مشخص گردید که همه فاکتورها به استثنای ریسک اعتباری کشورها و کارمزد بقیه فاکتورها رابطه معناداری با ریسک اعتباری دارند در ضمن نرخ بهره , نرخ تورم, ریکاوری, و نوع صنعت و ریسک کشورها اثر عکس روی ریسک اعتباری داردو پوشش, وثی...

Experimental phytoplasma transmissions by insects

Experimental and theoretical characterization of a new Schiff-base ligand

Here, new N,N′-dipyridoxyl(4,4''-diaminodiphenylether) Schiff-base ligand has been synthesized and characterized by IR, 1H NMR and mass spectrometry. Also, geometry optimization and theoretical assignment of IR spectrum of the ligand have been computed by employing density functional theory (DFT) method. Two pyridine rings and benzene rings in the bridge region are not in the same plane. The ca...

Theoretical and Experimental Investigation of Rayleigh Waves on Spherical and Cylindrical Surfaces

Non contact laser ultrasonic methods are appropriated for investigating SAW propagation on curved surfaces. They eliminate coupling issues in the generation and detection of the waves, and their high temporal resolution enables studying the dispersion effect on a large frequency range. We investigate the variations of the phase and group velocities for Rayleigh waves propagating on a sphere or ...