Bauhaus University, Weimar

About: Bauhaus University, Weimar is a education organization based out in Weimar, Thüringen, Germany. It is known for research contribution in the topics: Finite element method & Isogeometric analysis. The organization has 1421 authors who have published 2998 publications receiving 104454 citations. The organization is also known as: Bauhaus-Universität Weimar & Hochschule für Architektur und Bauwesen.

Dynamic Responses of Composite Plates on the Pasternak Foundation Subjected to a Moving Mass by a Cell-based Smoothed Discrete Shear Gap (CS-FEM-DSG3) Method

Abstract: A cell-based smoothed discrete shear gap method (CS-FEM -DSG3) using triangular elements was recently proposed to improve the performance of the discrete shear gap method (DSG3) for static and dynamics analyses of Mindlin plates. In this paper, the CS-FEM -DSG3 is incorporated with spring systems for dynamic analyses of composite plates on the Pasternak foundation subjected to a moving mass. The composite plate-foundation system is modeled as a d iscretizat ion of triangular plate elements supported by discrete springs at the nodal points representing the Pasternak foundation. The position of the moving mass with specified velocity on triangular elements at any time is defined, and then the moving mass is transformed into loads at nodes of elements. The accuracy and reliability of the proposed method is verified by comparing its numerical solutions with those of other available numerical results. A parametric examination is also conducted to determine the effects of various parameters on the dynamic response of the composite plates on the Pasternak foundation subjected to the moving mass.

How Writers Search: Analyzing the Search and Writing Logs of Non-fictional Essays

Abstract: Many writers of non-fictional texts engage intensively in exploratory web search scenarios during their background research on the essay topic. Though understanding such search behavior is necessary for the development of search engines that specifically support writing tasks, it has neither been systematically recorded nor analyzed. This paper contributes part of the missing research: We report on the outcomes of a large-scale corpus construction initiative to acquire detailed interaction logs of writers who were given a writing task on 150 pre-defined TREC topics. The corpus is freely available to foster research on exploratory search. Each essay is at least 5000 words long and comes with a chronological log of search queries, result clicks, web browsing trails, and fine-grained writing revisions that reflect the task completion status. To ensure reproducibility, a fully-fledged, static web search environment has been created on top of the ClueWeb09 corpus as part of our initiative.In this paper, we present initial analyses of the recorded search interaction logs and overview insights gained from them: (1) essay writing behavior corresponds to search patterns that are rather stable for the same writer, (2) fact-checking queries often conclude a writing task, (3) recurring anchor queries are often submitted to not lose the main themes or to explore new directions, (4) query terms can be learned while searching and reading, (5) the number of submitted queries is not a good indicator for task completion.

Interface Characterization Between Polyethylene/ Silica in Engineered Cementitious Composites by Molecular Dynamics Simulation.

Abstract: Polyethylene is widely adopted in engineered cementitious composites to control the crack width. A clearer knowledge of the PE/concrete interfacial properties is important in developing engineered cementitious composites, which can lead to a limited crack width. Tensile failure and adhesion properties of the amorphous polyethylene/silica (PE/S) interface are investigated by molecular dynamics to interpret the PE/concrete interface. The influence of the PE chain length, the PE chain number and coupling agents applied on silica surface on the interfacial adhesion is studied. An increase of the adhesion strength of the modified silica surface by coupling agents compared with the unmodified silica is found. The failure process, density profile and potential energy evolutions of the PE/S interface are studied. The thermodynamic work of adhesion that quantifies the interfacial adhesion of the PE/S interface is evaluated. The present study helps to understand the interfacial adhesion behavior between ECC and PE, and is expected to contribute to restricting the crack width.

Toward Advanced Social TV in a Cooperative Media Space

Abstract: Social TV systems provide groups of TV spectators with technical support for colocated and geographically distributed TV watching and social interaction This article provides a systematic overview of the design space of Social TV and suggests a technical framework for flexible Social TV providing groups of TV spectators with sophisticated yet easy-to-use support for colocated and geographically distributed TV watching and social interaction It sketches a scenario of advanced Social TV and then reviews previous concepts and systems as well as studies on Social TV to come to an in-depth presentation of design dimensions of Social TV It introduces the Cooperative Media Space for Social TV as a technical platform for flexible support of advanced Social TV along the identified design dimensions

New Related-Key Boomerang Attacks on AES

Abstract: In this paper we present two new attacks on round reduced versions of the AES We present the first application of the related-key boomerang attack on 7 and 9 rounds of AES-192 The 7-round attack requires only 218 chosen plaintexts and ciphertexts and needs 2675 encryptions We extend our attack to nine rounds of AES-192 This leaves to a data complexity of 267 chosen plaintexts and ciphertexts using about 214333 encryptions to break 9 rounds of AES-192