arXiv subjects

Anne Nguyen

Publications and source records attributed to Anne Nguyen.

3 recordsLinked to original sources

arXiv2017

Cold light dark matter in extended seesaw models

We present a thorough discussion of light dark matter produced via freeze-in in two-body decays A -> B DM. If A and B are quasi-degenerate, the dark matter particle has a cold spectrum even for keV masses. We show this explicitly by calculating the transfer function that encodes the impact on structure formation. As examples for this setup we study extended seesaw mechanisms with a spontaneously broken global U(1) symmetry, such as the inverse seesaw. The keV-scale pseudo-Goldstone dark matter particle is then naturally produced cold by the decays of the quasi-degenerate right-handed neutrinos.

hep-ph↗

arXiv2013

Wheel of B2C E-commerce Development in Saudi Arabia

Online retailing (a model of B2C e-commerce) is growing world-wide, with companies in many countries showing increased sales and productivity as a result. It has great potential within the global economy. This paper looks at the current status of online retailing in Saudi Arabia, with particular focus on what inhibits or enables both the customers and retailers. It also analyses the status of Government involvement and proposes a layered model, known as the Wheel of Online Retailing which illustrates how Government intervention can benefit the e-commerce in Saudi Arabia.

cs.CY↗

arXiv2013

Validation of the IS Impact Model for Measuring the Impact of e-Learning Systems in KSA Universities: Student Perspective

The IS-Impact Measurement Model, developed by Gable, Sedera and Chan in 2008, represents the to-date and expected stream of net profits from a given information system (IS), as perceived by all major user classes. Although this model has been stringently validated in previous studies, its generalizability and verified effectiveness are enhanced through this new application in e-learning. This paper focuses on the re-validation of the findings of the IS-Impact Model in two universities in the Kingdom of Saudi Arabia (KSA). Among the users of 2 universities e-learning systems, 528 students were recruited. A formative validation measurement with SmartPLS, a graphical structural equation modeling tool was used to analyse the collected data. On the basis of the SmartPLS results, as well as with the aid of data-supported IS impact measurements and dimensions, we confirmed the validity of the IS-Impact Model for assessing the effect of e-learning systems in KSA universities. The newly constructed model is more understandable, its use was proved as robust and applicable to various circumstances.

cs.CY↗