We prove a new characterization of graded von Neumann regular rings involving the recently introduced class nearly epsilon-strongly rings. As our main application, we generalize Hazrat's result that Leavitt path algebras over fields are regular. More precisely, show algebra LR(E) with coefficients in unital ring R is if and only also both corner skew Laurent polynomial semiprimitive semiprime. ...

Harriet Nuwagaba-Biribonwoha ([email protected]) Bazghina Werq-Semo ([email protected]) Aziz Abdallah ([email protected]) Amy Cunningham ([email protected]) John G Gamaliel ([email protected]) Sevestine Mtunga ([email protected]) Victoria Nankabirwa ([email protected]) Isaya Malisa ([email protected]) Luis F Gonzalez ([email protected]) Charles Massambu (cmassambu@hotm...

this paper deals with the interfacial effects of silica fume (sf) and styrene-butadiene polymer (sbr) on compressive strength of concrete. analyzing the compressive strength results of 32 concrete mixes performed over two water-binder ratios (0.35, 0.45), four percentages replacement of silica fume (0%, 5%, 7.5%, 10%) and four percentages of sbr (0%, 5%, 10%, 15%) were investigated. a mathemati...

Mark J. Panaggio, ∗ Bertand J. Ottino-Löffler, Peiguang Hu, and Daniel M. Abrams 4 Department of Engineering Sciences and Applied Mathematics, Northwestern University, Evanston, IL 60208, USA Department of Mathematics, Caltech, Pasadena, CA 91126, USA Engineering Science Program, National University of Singapore, Singapore Northwestern Institute on Complex Systems, Northwestern University, Evan...

Elisabetta Erba Dipartimento di Scienze della Terra, Università di Milano, 20133 Milano, Italy Lewis J. Abrams Center for Marine Science, University of North Carolina, Wilmington, North Carolina 28409, USA Bruce P. Luyendyk Department of Geological Sciences, University of California, Santa Barbara, California 93106, USA Joann M. Stock Robert W. Clayton  Division of Geological and Planetary Sc...

The Abrams Main Battle Tank (MBT) has had a relatively good show. Due to its considerable frontal armor protection it has been able to effectively spearhead many tactical maneuvers. But it has weaknesses: a vulnerability to RPG fire from the rear and, more importantly, serious shortcomings in operational and strategic mobility, because this exceptionally heavy vehicle is driven by a very thirst...

Sara M. Clifton, ∗ Rosemary I. Braun, 3 and Daniel M. Abrams 3, 4 Department of Engineering Sciences and Applied Mathematics, Northwestern University, Evanston, Illinois 60208, USA Division of Biostatistics, Northwestern University, Chicago, Illinois 60611, USA Northwestern Institute for Complex Systems, Northwestern University, Evanston, Illinois 60208, USA Department of Physics and Astronomy,...

The dependence of gastric mucosal structure and function on hormonal activity has been the subject of many investigations (Welbourn and Ward, 1962; Zollinger and Craig, 1960; Grossman, 1950). The conflicting nature of experimental findings and interpretations, particularly as related to the effect of adrenal cortical hormones on gastric secretion, is reflected in many articles reviewing this su...

INTRODUCTION As the Wisconsin ice sheets retreated to the North toward the end of the Pleistocene Epoch, tundra and boreal vegetation that had dominated the Central Hardwood Region began to be replaced by hardwood species. Spurred on by the warming climate and the widespread use of fire by Native Americans, oaks (Quercus spp.) gradually dominated the region (Abrams 2002, Carroll and others 2002).