Recent engineering experiences with the Missile Defense Agency (MDA) Ballistic Missile Defense System (BMDS) highlight the need to analyze the BMDS System of Systems (SoS) including the numerous potential interactions between independently developed elements of the system. The term “interstitials” is used to define the domain of interfaces, interoperability, and integration between constituent ...

Formulation of given computer system or network problems into abstract stochastic models is considered. Generally speaking, model formulation is an art. While analytic results are clearly not powerful enough to provide a "cookbook" approach to modelling, general methodology and difficulties on model formulation are discussed through examinations of various computer system and network models. Th...

We describe JOINT DEFENDER, a new two-sided optimization model for planning the pre-positioning of defensive missile interceptors to counter an attack threat. In our basic model, a defender pre-positions ballistic missile defense platforms to minimize the worst-case damage an attacker can achieve; we assume that the attacker will be aware of defensive pre-positioning decisions, and that both si...

A numerical trajectory optimization study of two types of lifting-entry reentry vehicle has been presented at low suborbital speed of 4.113 km/s and -15 degree entry angle. These orbital speeds are typical of medium range ballistic missile with ballistic range of approximately 2000 km at optimum burnout angle of approximately 41 degree for maximum ballistic range. A lifting reentry greatly enha...

This paper develops a model of short-range ballistic missile defense and uses it to study the performance of Israel’s Iron Dome system. The deterministic base model allows for inaccurate missiles, unsuccessful interceptions, and civil defense. Model enhancements consider the trade-offs in attacking the interception system, the difficulties faced by militants in assembling large salvos, and the ...

Gastric cancer (GC) is the sixth most commonly diagnosed malignancy and the third leading cause of cancer deaths worldwide (Ferlay et al., 2010). The highest incidence rates are noted in Japan, Eastern Asia, Andean regions of South America and Eastern Europe, whereas the lowest are observed in North and East Africa, Northern Europe and North America (Ferlay et al., 2010). Incidence rates for GC...

The paper studies the labor markets of 23 transition countries from eastern and central Europe—Albania, Armenia, Belarus, Bulgaria, Croatia, Czech Republic, East Germany, Estonia, Georgia, Hungary, Kazakhstan, Kyrgyzstan, Latvia, Lithuania Macedonia, Moldova, Poland, Romania, Russia, Slovakia, Slovenia, Ukraine, and Yugoslavia. It uses new micro-data from a large number of surveys on over 200,0...