The property profile exhibited by cellular metals identifies several applications, especially in technologies requiring multifunctionality. Their specific property attributes suggest implementation as: ultralight panels/shells, energy absorbing structures and heat dissipation media as well as for vibration control. Connections between the properties that govern these performance benefits and th...

We study the Mifare Ultralight cards in detail, and we present a new secure method for the recharge of these RFID disposable tickets that also extends to the case of multiple resources on a single device. We specify a formal but yet realistic semantics of these cards, and we also define a simple imperative language suitable to program secure APIs. In fact, the language is provided with a type-s...

We propose a scenario in which dark energy and dark matter are described in a unified manner. The ultralight pseudo-Nambu-Goldstone (pNG) boson, A, naturally explains the observed magnitude of dark energy, while the bosonic supersymmetry partner of the pNG boson, B, can be a dominant component of dark matter. The decay of B into a pair of electron and positron may explain the 511 keV γ ray from...

Supersymmetric (SUSY) standard models in which the lightest SUSY particle (LSP) is an ultralight gravitino (m3/2 = O(1) eV) are very attractive, since they are free from the cosmological gravitino problems. If the neutralino is the next lightest SUSY particle (NLSP), it decays into a photon and the gravitino in collider experiments. We propose a simple test for the lightness of gravitino at the...

We reconsider entropy arguments which have been previously argued to support the idea that dark matter constituents are primordial black holes with many solar masses. It has recently shown QCD axions solve strong CP problem may masses [Formula: see text] in extended range text]. Ultralight provide so degrees of freedom their can exceed holes. This suggests ultralight more suited than be matter.

OBJECTIVES To assess the knowledge of smokers and ex-smokers about light cigarettes and nicotine yields and their perception of the risk of lung cancer, and to identify the characteristics of smokers of light cigarettes. METHODS Mail survey in a population sample of 494 smokers and exsmokers in Geneva, Switzerland, in 1999. RESULTS Participants were on average 40 years old, and 49% were men...

Ultralight axions and other bosons are dark matter candidates present in many high energy physics theories beyond the Standard Model. In particular, string axiverse postulates existence of up to $\mathcal{O}(100)$ light scalar constituting sector. Considering a mixture cold matter, we obtain upper bounds for axion relic density $\Omega_a h^2 < 0.004$ mass $10^{-31}\;\mathrm{eV}\leq m_a \leq 10^...