Background: Global and Iranian statistics indicate a rise in the newly emerging phenomenon of voluntary childlessness as a permanent status among couples. Childlessness is one of the main challenges of modern society. In Iran, studies on the process of voluntary permanent childlessness are scarce. The present study aimed to investigate the causes and underlying factors of voluntary childlessnes...

For the challenging problem that a spacecraft approaches tumbling target with non-cooperative maneuver, an anti-saturated proximity control method is proposed in this paper. First, brand-new appointed-time convergent performance function developed via exploring Bézier curve to quantitatively characterize transient and steady-state behaviors of pose tracking error system. The major advantage act...

The major advantage of laser lighting over white light-emitting-diode is the possibility to achieve ultra-high luminance. However, phosphors usually suffer laser-induced luminescence saturation, which limits peak luminance devices. aim present study develop LuAG:Ce/Al2O3 composite ceramics (LACCs) with a high saturation threshold for high-luminance lighting. Owning rigid c...

At high values of degree saturation, the apparent soil water retention curve (SWRC) measured in a wetting test laboratory may differ from true SWRC, because occurrence air trapping, meaning that gas pressure trapped is greater than externally applied pressure. Physical arguments indicate SWRC will reach full saturation at positive value suction. Analytical and numerical modelling phenomenon tra...

objective: pseudomonas aeruginosa is the major cause of septicemia and wound infection in burned patients. immunotraphy is the best practical way for prevention and treatment of these infections. flagella as one of the most important bacterial virulence factors has important role in attachment, motility, chemotaxis and tlr-5-dependent immune response so that it propounded as a vaccine candidate...

Moisture mode instability is thought to occur in the tropical oceanic atmosphere when precipitation is a strongly increasing function of saturation fraction (precipitable water divided by saturated precipitable water) and when convection acts to increase the saturation fraction. A highly simpli ed model of the interaction between convection and large-scale ows in the tropics suggests that there...

While electrowetting has many applications, it is limited at large voltages by contact angle saturation, a phenomenon that is still not well understood. We propose a generalized approach for electrowetting that, among other results, can shed new light on contact angle saturation. The model assumes the existence of a minimum (with respect to the contact angle) in the electric energy and accounts...

this qualitative research was carried out with aim to diagnosis ethical milieu of entrepreneurship and enterprise development. this applied research was done through descriptive phenomenology method. semi-structured interviews were implemented in order to collect data. statistical population of this research consisted of all entrepreneurs and enterprise’s managers of in golestan province. throu...

1. Drugs such as phenobarbitone and phenylbutazone, which increase the concentration of microsomal haem and cytochrome P-450, also increase the saturation of rat liver apo-(tryptophan pyrrolase) with its haem activator, as does the haem precursor 5-aminolaevulinate. 2. At 4h after the administration of the porphyrogens 2-allyl-2-isopropylacetamide, 3,5-diethoxycarbonyl-1,4-dihydrocollidine and ...