We present a simple SIR-Ross-MacDonald like model of the infestation of a honeybee (Apis mellifera) colony by the Acute Bee Paralysis Virus (ABPV), which is transmitted by parasitic varroa mites (Varroa destructor) as vector. This is a four dimensional system of nonlinear ordinary differential equations for the dependent variables healthy and virus infected bees, number of mites in the colony o...

ABBREVIATIONS. USPHS, US Public Health Service; IDSA, Infectious Diseases Society of America; HIV, human immunodeficiency virus; PCP, Pneumocystis carinii pneumonia; TE, toxoplasmic encephalitis; MAC, Mycobacterium avium complex; AIDS, acquired immunodeficiency syndrome; TB, tuberculosis; TMP/ SMZ, trimethoprim/sulfamethoxazole; BI, bacterial infections; TST, tuberculin skin test; PPD, purified...

ABBREVIATIONS. USPHS, US Public Health Service; IDSA, Infectious Diseases Society of America; HIV, human immunodeficiency virus; PCP, Pneumocystis carinii pneumonia; TE, toxoplasmic encephalitis; MAC, Mycobacterium avium complex; AIDS, acquired immunodeficiency syndrome; TB, tuberculosis; TMP/ SMZ, trimethoprim/sulfamethoxazole; BI, bacterial infections; TST, tuberculin skin test; PPD, purified...

Automated software refactoring is known to be one of the "hard" combinatorial optimization problems of the search-based software engineering field. The difficulty is mainly due to candidate solution representation, objective function description and necessity of functional behavior preservation of software. The problem is formulated as a combinatorial optimization problem whose objective functi...

Nowadays, cross-docking is one of the main concepts in supply chain management in which products received to a distribution center by inbound trucks which are directly to lead into outbound trucks with a minimum handling and storage costs as the main cost of a cross-docking system. According to the literature, several metaheuristics and heuristics are attempted to solve this optimization model....

Nowadays, several methods in production management mainly focus on the different partners of supply chain management. In real world, the capacity of planes is limited. In addition, the recent decade has seen the rapid development of controlling the uncertainty in the production scheduling configurations along with proposing novel solution approaches. This paper proposes a new mathematical model...

The worldwide decline in honeybee colonies during the past 50 years has often been linked to the spread of the parasitic mite Varroa destructor and its interaction with certain honeybee viruses. Recently in the United States, dramatic honeybee losses (colony collapse disorder) have been reported; however, there remains no clear explanation for these colony losses, with parasitic mites, viruses,...

  The clustering problem under the criterion of minimum sum of squares is a non-convex and non-linear program, which possesses many locally optimal values, resulting that its solution often falls into these trap and therefore cannot converge to global optima solution. In this paper, an efficient hybrid optimization algorithm is developed for solving this problem, called Tabu-KM. It gathers the ...