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The biggest problem for a shallow foundation, just as for any other type of foundation, is a failure due to an overestimation of the bearing capacity. This means that the correct prediction of the bearing capacity of the foundation is often the most important part of the design of a civil structure. That is why the publication by Prandtl in 1920 about the hardness of a plastic body, was a major step in solving the bearing capacity of shallow foundations, although it is well possible that he never realised this, because his solution was not made for civil engineering purposes, but for mechanical purposes. Over the last 100 years, a lot of extensions have been made, for example with inclination factors and shape factors. Also many laboratory experiments have been done and numerical calculations have been made. Some even try to extrapolate the failure mechanism for shallow foundations to the failure mechanism around the tip of a pile. All this scientific work leads back to the first publication by Ludwig Prandtl in 1920. This book, “100 Years of Prandtl’s Wedge”, is intended for all those who are interested in these fundamentals of foundation engineering and their history. The Appendices include a copy of Prandtl’s Über die Härte plastischer Körper and of Reissner’s publication of 1924, Zum Erddruckproblem.

foundation --- bearing capacity --- civil --- structure --- Ludwig Prandtl --- inclination factors --- shape factors --- engineering

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We generate and gather a lot of data about ourselves and others, some of it highly confidential. The collection, storage and use of this data is strictly regulated by laws, but restricting the use of data often limits the benefits which could be obtained from its analysis. Secure multi-party computation (SMC), a cryptographic technology, makes it possible to execute specific programs on confidential data while ensuring that no other sensitive information from the data is leaked. SMC has been the subject of academic study for more than 30 years, but first attempts to use it for actual computations in the early 2000s – although theoretically efficient – were initially not practicable. However, improvements in the situation have made possible the secure solving of even relatively large computational tasks. This book describes how many different computational tasks can be solved securely, yet efficiently. It describes how protocols can be combined to larger applications, and how the security-efficiency trade-offs of different components of an SMC application should be chosen. Many of the results described in this book were achieved as part of the project Usable and Efficient Secure Multi-party Computation (UaESMC), which was funded by the European Commission. The book will be of interest to all those whose work involves the secure analysis of confidential data.

cryptology --- data --- legislation --- SMC --- security --- multi-party computation --- confidentiality --- UaESMC

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What is digital business reporting? Why do we need it? And how can we improve it? This book aims to address these questions by illustrating the rise of system-to-system information exchange and the opportunities for improving transparency and accountability. Governments around the world are looking for ways to strengthen transparency and accountability without introducing more red tape, which is a source of growing frustration and costs for businesses. In 2004, the Ministry of Finance and the Ministry of Justice in the Netherlands started to investigate the potential of XBRL (eXtensible Business Reporting Language) as a uniform data standard for business-to-government information exchange. In 2006, there was a comprehensive architecture for Standard Business Reporting (SBR), including the requirements for the information infrastructure. One year later the first reports in XBRL were successfully delivered to the Tax and Customs Administration and the Chamber of Commerce via a secure infrastructure. Today, millions of business reports are being exchanged using SBR. As a solution, SBR empowers organisations to present a cohesive explanation of their business operations and helps them engage with internal and external stakeholders, including regulators, shareholders and creditors. Challenging the chain describes the journey of SBR from challenge to solution. Specialists in the field – flanked by academics – provide detailed insights on the challenges actors faced and the solutions they achieved. In its versatility, this book exemplifies the necessary paradigm shifts when it comes to such large-scale public-private transformations. Policy makers, managers, IT specialists and architects looking to engage in such transformations will find guidance in this book.

transparency --- digital business reporting --- information exchange --- accountability --- XBRL --- eXtensible Business Reporting Language --- Standard Business Reporting --- SBR --- information chain

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Vanuit de ‘design & build’ ervaringen in zijn eigen bedrijf in Delft heeft Mick Eekhout een geactualiseerde versie geschreven van het boek over de methodologie die hij gebruikt als ontwerper van draagconstructies en bouwconstructies in gevels en daken. Hij heeft de methodologie ook jarenlang aan studenten onderwezen om standaard bouwproducten te ontwikkelen, evenals systeemproducten en speciale producten ofwel (bouw)componenten. Het eerste deel van het boek behandelt methodisch werken, het tweede deel behandelt voor de drie genoemde hoofdtypen (standaard-, systeem- en speciaalproducten) de beste methodologie om tot een succesvol resultaat te komen. Het boek wordt gebruikt om studenten een volledig overzicht over de praktische methodologie van het componentontwerpen en productontwikkelen te geven. Het boek is nuttig voor architecten die speciale componenten in hun gebouwen willen ontwikkelen. Bouwproductontwerpers zullen in het boek meer overwegingen vinden dan ze in hun eigen praktijk tegenkomen. Het doel van dit boek is de innovatieve industriële productontwikkeling van de bouw in de praktijk te bevorderen.

ontwerpmethodologie -- bouwproducten --- bouwcomponenten

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Sand, clay and rock have to be excavated for a variety of purposes, such as dredging, trenching, mining (including deep sea mining), drilling, tunnel boring and many other applications. Many excavations take place on dry land, but they are also frequently required in completely saturated conditions, and the methods necessary to accomplish them consequently vary widely. This book provides an overview of cutting theories. It begins with a generic model, valid for all types of soil (sand, clay and rock), and continues with the specifics of dry sand, water-saturated sand, clay, atmospheric rock and hyperbaric rock. Small blade angles and large blade angles are discussed for each soil type, and for each case considered the equations/model for cutting forces, power and specific energy are given. With models verified by laboratory research, principally from the Delft University of Technology, and data from other recognized sources, this book will prove an invaluable reference for anybody whose work involves major excavations of any kind.

sand --- clay --- rock --- excavations