This book develops a modern presentation of Continuum Mechanics, oriented towards numerical applications in the ?elds of nonlinear analysis of solids, structures and ?uids. Kinematics of the continuum deformation, including pull-back/push-forward transformations between di erent con?gurations; stress and strain measures; objective stress rate and strain rate measures; balance principles; constitutive relations, with emphasis on elasto-plasticity of metals and variational prin- ples are developed using general curvilinear coordinates. Being tensor analysis the indispensable tool for the development of the continuum theory in general coordinates, in the appendix an overview of t- soranalysisisalsopresented. Embedded in the theoretical presentation, application examples are dev- oped to deepen the understanding of the discussed concepts. Even though the mathematical presentation of the di erent topics is quite rigorous; an e ort is made to link formal developments with engineering ph- ical intuition. This book is based on two graduate courses that the authors teach at the Engineering School of the University of Buenos Aires and it is intended for graduate engineering students majoring in mechanics and for researchers in the ?elds of applied mechanics and numerical methods. VIII Preface I am grateful to Klaus-Jurgen Bathe for introducing me to Computational Mechanics, for his enthusiasm, for his encouragement to undertake challenges and for his friendship."

Intragastric balloons are steadily gaining popularity among the medical treatments available for obesity. Their efficacy and safety are reinforced by growing body of evidence obtained around the globe. Intragastric balloons are now considered one of the safest and most effective medical procedures for weight reduction. Additionally, the reduced potential for side effects and low invasiveness (compared to bariatric surgeries) are important considerations. This book is edited by renowned surgeons and endoscopists from Brazil, a country known for its reputation on the field of bariatric endoscopy and surgery. Such reputation is especially valid where the use of intragastric balloons is concerned. These devices, approved by the FDA only in 2015, have been used in Brazil since the 1990s, attesting to Brazilian expertise in the field. This book describes the various types of intragastric balloons used for the treatment of obesity, an alternative to bariatric surgery and other more invasive methods. It addresses their indications, procedures and outcomes, providing readers an overview of the therapeutic options available worldwide. It is divided into seven main sections: I - Introductory Issues; II - Devices; III - Technical Procedures and Related Issues; IV - Acute Complications and Treatment; V - Chronic Complications and Treatment; VI - Special Populations; and VII - Miscellaneous. This structure helps to promote a better knowledge construction and a reasonable flow of ideas throughout the book, guiding the reader from introductory topics to surgical procedures and complications. The book ultimately intends to offer an essential reference guide for all physicians and surgeons interested in the treatment of obese patients. It is intended for both experienced professionals looking for in-depth information and for trainees and residents seeking to broaden their perspectives concerning the treatment of obesity.

This book presents a detailed discussion of the models that were developed to simulate the collapse and post-collapse behavior of steel pipes. The finite element method offers to engineers the possibility of developing models to simulate the collapse behavior of casings inside oil wells and the collapse behavior of deepwater pipelines. However, if technological decisions are going to be reached from these model results, with implications for the economic success of industrial operations, for the occupational safety and health and for the environment, the engineering models need to be highly reliable. Using these models engineers can quantify the effect of manufacturing tolerances, wear, corrosion, etc. This book describes in great details the experimental programs that are developed to validate the numerical results.

This book develops a modern presentation of Continuum Mechanics, oriented towards numerical applications in the ?elds of nonlinear analysis of solids, structures and ?uids. Kinematics of the continuum deformation, including pull-back/push-forward transformations between di erent con?gurations; stress and strain measures; objective stress rate and strain rate measures; balance principles; constitutive relations, with emphasis on elasto-plasticity of metals and variational prin- ples are developed using general curvilinear coordinates. Being tensor analysis the indispensable tool for the development of the continuum theory in general coordinates, in the appendix an overview of t- soranalysisisalsopresented. Embedded in the theoretical presentation, application examples are dev- oped to deepen the understanding of the discussed concepts. Even though the mathematical presentation of the di erent topics is quite rigorous; an e ort is made to link formal developments with engineering ph- ical intuition. This book is based on two graduate courses that the authors teach at the Engineering School of the University of Buenos Aires and it is intended for graduate engineering students majoring in mechanics and for researchers in the ?elds of applied mechanics and numerical methods. VIII Preface I am grateful to Klaus-Jurgen Bathe for introducing me to Computational Mechanics, for his enthusiasm, for his encouragement to undertake challenges and for his friendship."

Intragastric balloons are steadily gaining popularity among the medical treatments available for obesity. Their efficacy and safety are reinforced by growing body of evidence obtained around the globe. Intragastric balloons are now considered one of the safest and most effective medical procedures for weight reduction. Additionally, the reduced potential for side effects and low invasiveness (compared to bariatric surgeries) are important considerations. This book is edited by renowned surgeons and endoscopists from Brazil, a country known for its reputation on the field of bariatric endoscopy and surgery. Such reputation is especially valid where the use of intragastric balloons is concerned. These devices, approved by the FDA only in 2015, have been used in Brazil since the 1990s, attesting to Brazilian expertise in the field. This book describes the various types of intragastric balloons used for the treatment of obesity, an alternative to bariatric surgery and other more invasive methods. It addresses their indications, procedures and outcomes, providing readers an overview of the therapeutic options available worldwide. It is divided into seven main sections: I - Introductory Issues; II - Devices; III - Technical Procedures and Related Issues; IV - Acute Complications and Treatment; V - Chronic Complications and Treatment; VI - Special Populations; and VII - Miscellaneous. This structure helps to promote a better knowledge construction and a reasonable flow of ideas throughout the book, guiding the reader from introductory topics to surgical procedures and complications. The book ultimately intends to offer an essential reference guide for all physicians and surgeons interested in the treatment of obese patients. It is intended for both experienced professionals looking for in-depth information and for trainees and residents seeking to broaden their perspectives concerning the treatment of obesity.

Cuando Doug Crowley, retrasado en su camino al trabajo, aborda un autobus de la ciudad de Denver, piensa que su unico problema es el tiempo. Crimenes cometidos anos atras han desaparecido de su memoria, la culpa olvidada. Solo cuando se cierran las puertas del autobus y una mujer aterrorizada cuenta sus propios pecados, es que Crowley recuerda las atrocidades sangrientas que el infligio a inocentes hace mucho tiempo en la guerra. Para ese momento es demasiado tarde tanto para Crowley como para todos los demas abordo del autobus en movimiento. Es hora de pagar. El conductor anuncia la siguiente parada, y el horror comienza.

Cuando Mark Thompson cruza el Puente desde Texas hasta Mexico por una noche de diversion, no tenia idea de que la sensual stripper que termina en sus piernas seria una vampira. A pesar de quedar prendado de la hermosa mujer, su estricta educacion catolica le dice que debe destruirla. Seria capaz de hacerlo, o podria ser que una eternidad con Carmen no estaria tan mal? Los dictamenes religiosos luchan contra el amor para empujar a Mark a tomar una decision que cambiara la vida de ambos por siempre.