The behavior of steel structures subjected to seismic actions depends directly on the connections behavior. There are two current tendencies for ensuring the structural ductility: allowing the formation of plastic hinges in the beams by using reduced beam sections or reduced web sections or by ensuring the plastic hinge formation in the connection by using dissipative elements. This paper prese...

The light element abundances probe the baryon density of the universe within a few minutes of the Big Bang. Of these relics from the earliest universe, deuterium is the baryometer of choice. By comparing its primordial abundance inferred from observations with that predicted by Big Bang Nucleosynthesis (BBN), the early universe baryon density is derived. This is then compared to independent est...

Standard big bang nucleosynthesis (SBBN) has been remarkably successful, and it may well be the correct and sufficient account of what happened. However, interest in variations from the standard picture come from two sources: First, big bang nucleosynthesis can be used to constrain physics of the early universe. Second, there may be some discrepancy between predictions of SBBN and observations ...

The signals that will be received on Earth from deep-space probes in future implementations of free-space optical communication will be extremely weak and new ground stations will have to be developed in order to support these links. This paper addresses the feasibility of using the technology developed in the gamma-ray telescopes that will make up the CTA (Cherenkov Telescope Array) observator...

We combine complementary datasets to constrain dark energy. Using standard Big Bang Nucleosynthesis and the observed abundances of primordial nuclides to put constraints on ΩQ at temperatures near T ∼ 1MeV , we find the strong constraint ΩQ(MeV) < 0.045 at 2σ c.l.. Under the assumption of flatness, using results from Cosmic Microwave Background (CMB) anisotropy measurements, high redshift super...

    Beekeeping as a technology package disseminated to target farmers in Nigeria seems to suffer setbacks ranging from negative perception of farmers about the technology to technical contents of the package. This study therefore analyzes the technology attributes that influence non adoption of apiary technology packages in Cross River State, Nigeria. Purposive and multist...

Identifying role of extension system in adoption of new technologies have important role to developing favorable extension systems. For supporting sustainable agriculture in Iran needs extension systems to be carefully thought and accurately implemented. The purpose of this is analyzing role of extension activities in adoption of sustainable agriculture. Based on the results the attending agric...

This study aimed to identify the factors influencing adoption of Integrated Pest Management (IPM) technologies by paddy farmers in Sari County of Iran. A sample of 260 farmers who selected randomly, participated in this study through a survey questionnaire. Findings of the study revealed a statistically significant positive correlation between adoption of IPM technologies and farmers’ participa...

Over half a million children in the United States are currently in foster care, many of whom are at risk for long-lasting emotional and health problems. Because research suggests that adoption may be one of the most promising options for the placement of these at-risk children, various policies have been introduced at all levels of government to encourage adoption. In 1980, Congress passed the ...

The asymptotic behaviour at late times of inhomogeneous axion-dilaton cosmologies is investigated. The space-times considered here admit two abelian space-like Killing vectors. These space-times evolve towards an anisotropic universe containing gravitational radiation. Furthermore, a peeling-off behaviour of the Weyl tensor and the antisymmetric tensor field strength is found. The relation to t...