The equations of motion (EOM) for the position and gauge invariant crystal momentum are considered for multiband wave packets of Bloch electrons.For a localized packet in a subset of bands well-separated from the rest of the band structure of the crystal, one can construct an effective electromagnetic Hamiltonian with respect Calendars to the cente

This study examines the influence of corporate governance on dividend policy Silverware based on a sample of Canadian firms listed on the S&P/TSX composite index during 2009-2012.The results show that firms with better governance quality, measured by the governance index provided by The Globe and Mail, have larger payouts and have a higher propensi

Mashael Al-Saeedi, Sahal Al-Hajoj Department of Infection First Aid and Immunity, Mycobacteriology Research Section, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia Abstract: Despite the efficacy of antibiotics to protect humankind against many deadly pathogens, such as Mycobacterium tuberculosis, nothing can prevent

The concrete cover has significant impact on the intensity of reinforcement corrosion process in reinforced concrete elements.Depending on the type of corrosion risk different types of cement are recommended for concrete.In conditions of chloride corrosion, due to, for example, the use of de-icing agents in winter, it is recommended to use concrete

Multithreshold segmentation of color images is an important part of modern image processing.Multithreshold segmentation techniques that use the ideas of optimization in mathematics to process the information contained in the three channels of RGB images have received much attention in recent years.In this paper, a hybrid algorithm of multiverse opt