in this paper, we study the electronic properties of a concentric triple quantum ring using exact diagonalization technique. the energy spectra and magnetization for a single electron and two electrons, in the presence of an applied magnetic field, are calculated and discussed. it is shown that, for two-interacting electrons, the period of aharonov-bohm oscillations decreases to the half of tha...

risks mean cases of uncertainty of project, the impact of which is realized as a threat (negative aspect) and/or opportunity (positive aspect). the traditional viewpoint on risk is a negative viewpoint that implies damages, loss and harmful consequences. judgments such as this on risk merely emphasize on risks management and pay less attention to opportunities management. it is clear that some ...

conclusions it was concluded that the prevalence of traumatic dental injuries was 9.3%. traumatic dental injuries among children exhibit complex interaction between the victims’ oral conditions and their behavior. therefore, prevention should consider a number of characteristics such as oral predisposing factors, environmental determinants and human behavior. it is recommended that specific and...

this paper explores people’s behavior when they are facing financial risks. through the setting of an economics experiment, people’s willingness to bear financial risks and their tendency to impose risks on others are investigated. the experiment result shows that most people are risk-neutral or risk-averse when making decision under financial environment, and their tendency to impose risks on ...

in this paper, the hartree-fock method has been formulated to investigate some of the ground state properties of quasi-one-dimensional interacting electron gas in the presence of the magnetic field. the bare coulomb interaction between electrons has been assumed. for this system, we have also computed some of its thermodynamic and magnetic properties such as the energy, pressure, incompressibil...

Organisations and individuals benefit when wireless networks are protected. After assessing the risks associated with wireless technologies, organisations can reduce the risks by applying countermeasures to address specific threats and vulnerabilities. These countermeasures include management, operational and technical controls. While these countermeasures will not prevent all p...

Algae react to changes in their environment, such as temperature, nutrients, etc. The uncertainty aquatic environments exacerbates several interacting pressures. As a result, lakes are vital society because they help mitigate flood risks. It maintains the natural equilibrium, allowing flora and fauna flourish. primary objective of this research is identify trophic state index, category, algal a...

piRNA guides the action of PIWI proteins to silence deleterious transposons in animal reproductive tissues. Biogenesis of piRNA-induced silencing complex (piRISC) involves a multi-step process. In this issue, Matsumoto et al. report the first crystal structure of a PIWI-clade protein displaying a guide RNA, ready for action.

We analyze free-space optical links employing imaging receivers in the presence of misalignment and atmospheric effects, such as haze, fog or rain. We present a detailed propagation model based on the radiative transfer equation. We also compare the relative importance of two mechanisms by which these effects degrade link performance: signal attenuation and image blooming. We show that image bl...