The dosimetric impact of orthopedic metal artifact reduction (O-MAR) on spine SBRT patients has not been comprehensively studied, particularly with spinal prostheses in high-dose gradient regions. Using both phantom and patient datasets, we investigated dosimetric effects of O-MAR in combination of various metal locations and dose calculation algorithms. A physical phantom, with and without a t...

We consider environments in which agents can cooperate on multiple issues and externalities are present both within and across issues. We propose a way to extend (Shapley) values that have been put forward to deal with externalities within issues to games where there are externalities within and across issues. We characterize our proposal through axioms that extend the Shapley axioms to our mor...

Consider an urban economy with two types of externalities, negative traffic congestion externalities and positive agglomeration externalities deriving from non-market interaction. Suppose that urban travel can be tolled, that non-market interaction cannot be subsidized, and that non-market interaction is stimulated by a reduction in travel costs. Then the optimal toll is below the congestion ex...

: one of the main classifications in human societies is based on sex. although this kind of classification is originated from the physiology of human being but it can result in some stereotypes about men and women. stereotypes are traits which can be attributed to all members of a group without considering the differences between them. in other words stereotypes are part of the thoughts and bel...

The aim of the present study was to investigate the effect of the characteristic elements of matrix attachment region (MAR) on transgene expression. Human β‑globin MAR was obtained by PCR amplification. A splicing MAR fragment containing all the characteristic elements of β‑globin MAR was artificially synthesized and then cloned into the eukaryotic expression vector. Following digestion and seq...

The importance of the mean annual runoff (MAR)-hydrological variable is paramount for catchment planning, development and management. MAR depicts the amount of uncertainty or chaos (implicitly information content) of the catchment. The uncertainty associated with MAR of quaternary catchments (QCs) in the Upper Vaal catchment of South Africa has been quantified through Shannon entropy. As a resu...

NATALIA DÍAZ-GUTIÉRREZ, FERNANDO VARGAS-SALINAS, MAURICIO RIVERA-CORREA, JULIÁN ANDRÉS ROJAS-MORALES, SERGIO ESCOBAR-LASSO, JULIÁN A. VELASCO, PAUL DAVID ALFONSO GUTIÉRREZ-CÁRDENAS & ADOLFO AMÉZQUITA Instituto Internacional de Conservación y Manejo de Vida Silvestre, Universidad Nacional, Heredia, Costa Rica. E-mail: [email protected] Departamento de Ciencias Biológicas, Universida...

International Co-Invention – characterized by patent applications where at least one of the co-inventor is foreign – has boomed in Central and Eastern Europe (CEE) since 1990. A significant number of these patents arise out of various forms of R&D collaboration with multinationals. We explain this phenomenon, building on the concept of “idea gap” elaborated by Romer (1993): western multinationa...

The authors provide a consideration of the vergence system and suggest an extension of the original model proposed by H. Heuer, M. Drawer, T. Romer, H. Kroger, and H. Knapp (1991) to explain why preferred vertical gaze angle is downward when fixating proximal targets. The practical implication of the revised model is that heterophoria (open-loop vergence bias) provides an indication of potentia...

Patent law is intended to promote the creativity of scientists and engineers. The system recognizes that the work of the individual is the engine that ultimately increases the state of scientific knowledge. As economist Paul Romer recognized, “Technological advance comes from things that people do.” Furthering creativity represents the constitutional, theoretical and doctrinal heart of patent l...