Two decades after their invention, the IBM word-based translation models, widely available in the GIZA++ toolkit, remain the dominant approach to word alignment and an integral part of many statistical translation systems. Although many models have surpassed them in accuracy, none has supplanted them in practice. In this paper, we propose a simple extension to the IBM models: an l0 prior to enc...

Two decades after their invention, the IBM word-based translation models, widely available in the GIZA++ toolkit, remain the dominant approach to word alignment and an integral part of many statistical translation systems. Although many models have surpassed them in accuracy, none have supplanted them in practice. In this paper, we propose a simple extension to the IBM models: an l0 prior to en...

Why do fertility rates vary so much across countries? Why are European fertility rates so much lower than American fertility rates? To answer these questions we extend the Becker-Barro framework to incorporate the decision to accumulate human capital (that determines earnings) and health capital (that determines life expectancy). We find that crosscountry differences in productivity and taxes c...

In this work, the some collective properties of even-even Ti isotopes in A50 mass region were studied by using interacting boson model-1 (IBM-1). This study includes calculations energy levels and electromagnetic transition rates 44-48Ti 52-60Ti isotopes. The neutron number 50Ti isotope is 28, magic number, was excluded from IBM-1 calculations. First, ratios analyzed comparing typical values U...

In 1995, IBM Global Services began implementing a business model that included support for the growth and development of communities of practice focused on the competencies of the organization. This paper describes our experience working with these communities over a five-year period, concentrating specifically on how the communities evolved. We present an evolution model based on observing ove...

In expanding from an application-oriented hierarchical database model information system to a system integrated with information-oriented relational database model, IBM offers its IMS/DB2 dual database strategy. There are also other non-IBM database technologies challenging DB2 as the only alternative for IMS installation. Automobile industries themselves are going through such a transition in ...

This paper investigates cell proliferation dynamics in small tumor cell aggregates using an individual-based model (IBM). The simulation model is designed to study the morphology of the cell population and of the cell lineages as well as the impact of the orientation of the division plane on this morphology. Our IBM model is based on the hypothesis that cells are incompressible objects that gro...

Recently, a new convex formulation of IBM Model 2 was introduced. In this paper we develop the theory further and introduce a class of convex relaxations for latent variable models which include IBM Model 2. When applied to IBM Model 2, our relaxation class subsumes the previous relaxation as a special case. As proof of concept, we study a new relaxation of IBM Model 2 which is simpler than the...