Technische Universität Berlin

8840 Items

Recent Submissions
Characterization data of reference cement CEM I 42.5 R used for Priority Program DFG SPP 2005 “Opus Fluidum Futurum - Rheology of reactive, multiscale, multiphase construction materials”

Lu, Zichen ; Haist, Michael ; Ivanov, Dimitri ; Jakob, Cordula ; Jansen, Daniel ; Leinitz, Sarah ; Link, Julian ; Mechtcherine, Viktor ; Neubauer, Jürgen ; Plank, Johann ; Schmidt, Wolfram ; Schilde, Carsten ; Schröfl, Christof ; Sowoidnich, Thomas ; Stephan, Dietmar (2019)

A thorough characterization of starting materials is the precondition for further research, especially for cement, which contains various phases and presents quite a complex material for fundamental scientific investigation. In the paper at hand, the characterization data of the reference cement CEM I 42.5 R used within the priority program 2005 of the German Research Foundation (DFG SPP 2005) ...

A Model for the Development of Sustainable Innovations for the Early Phase of the Innovation Process

Stock, Tim ; Obenaus, Michael ; Slaymaker, Amara ; Seliger, Günther (2017)

Current industrial development is faced by the global challenge to meet the continuously growing demand for capital and consumer goods in emerging countries while simultaneously ensuring a sustainable industrial growth in the social, environmental and economic dimension. By means of market dynamics of cooperation and competition in global value creation and knowledge networks, innovations geare...

Sustainability in Model-based Planning and Control of Global Value Creation Networks

Oertwig, Nicole ; Jochem, Roland ; Knothe, Thomas (2017)

Manufacturing companies are affected by an increasing complexity driven thru fast changing requirements in the global market. To meet the large catalogue of requirements, enterprises are forming global value creation networks and provide services jointly. The existing time pressure and the involvement of many stakeholders results in a demand of methods and tools for a quick configuration of suc...

Comparatively Assessing different Shapes of Lithium-ion Battery Cells

Schröder, Robert ; Aydemir, Muhammed ; Seliger, Günther (2017)

Different shapes of lithium-ion batteries (LIB) are competing as energy storages for the automobile application. The shapes can be divided into cylindrical and prismatic, whereas the prismatic shape can be further divided in regard to the housing stability in Hard-Case and Pouch. Within this paper, the differences in manufacturing costs and efforts as well as the shape related advantages and di...

Open Educational Resources as a Driver for Manufacturing-related Education for Learning of Sustainable Development

Roeder, Ina ; Severengiz, Mustafa ; Stark, Rainer ; Seliger, Günther (2017)

Since the Massachusetts Institute of Technology (MIT) launched its OpenCourseWare program in 2002, the idea of an open and democratic education has spread rapidly all over the globe. Under the name of “Open Educational Resources” (OER), innumerable working sheets, curricular and teaching units have been developed and shared digitally under free commons licenses, connecting teachers and learners...

Competitive Sustainable Globalization General Considerations and Perspectives

Jovane, Francesco ; Seliger, Günther ; Stock, Tim (2017)

Globalization has essentially empowered both newly industrialized and early industrialized countries but also caused considerable global challenges on economic, environmental, and social stability. Trends and risks of globalization and sustainability are specified by reports of global stakeholders as IMF, OECD, UN and its related organizations, WEF, WTO, and WWF. Competitive Sustainable Globali...

Increasing Construction Quality of External Thermal Insulation Composite System (ETICS) by Revealing on-site Degradation Factors

Sulakatko, Virgo ; Liisma, Eneli ; Soekov, Erki (2017)

The installation of External Thermal Insulation Composite System (ETICS) enables to protect building envelope from natural weather effects and increase energy efficiency. As the system can be installed externally with simple work methods the usage is growing in European countries. The quality of the outcomeisinfluencedby design, material selection, and on-site construction process. The on-site ...

Dynamic Model of Chloralkali Membrane Process

Budiarto, Thomas ; Esche, Erik ; Repke, Jens-Uwe ; Leksono, Edi (2017)

Chloralkali is one of the most important and energy intensive processes in the chemical industry. The process produces chlorine through electrochemical conversion. The process's energy consumption is a major production cost for the chloralkali industry. Since the demand for energy efficiency and environmentally friendly processes in industry increases, ion exchange membranes are used intensivel...

Automated Anomaly Detection in Virtualized Services Using Deep Packet Inspection

Wallschläger, Marcel ; Gulenko, Anton ; Schmidt, Florian ; Kao, Odej ; Liu, Feng (2017)

Virtualization technologies have proven to be important drivers for the fast and cost-efficient development and deployment of services. While the benefits are tremendous, there are many challenges to be faced when developing or porting services to virtualized infrastructure. Especially critical applications like Virtualized Network Functions must meet high requirements in terms of reliability a...

STEAM: A Platform for Scalable Spatiotemporal Analytics

Deva, Bersant ; Raschke, Philip ; Rodriguez Garzon, Sandro ; Küpper, Axel (2017)

Spatiotemporal datasets have become increasingly available with the introduction of a various set of applications and services trac- ing the behavior of moving objects. Recently, there has been a high demand in understanding these datasets using spatiotemporal analytics. While being considered of high value, spatiotemporal analytics did not yet see a wide spreading into the actual business work...

Developing and Standardising Definitions for Research Information: Framework and Methods of Successful Process Documentation

Riechert, Mathias ; Biesenbender, Sophie ; Quix, Christoph (2017)

We present a framework for a transparency-oriented process of developing semantic definitions for research information. The framework is applied to the project “Research Core Dataset” (2013-2015) that provided the context for developing a set of core definitions for research information for the German science system.

Modelling National Research Information Contexts Based on CERIF

Quix, Christoph ; Riechert, Mathias (2017)

We present the results of the data modelling in the project ‘Research Core Dataset’ (2013-2015) that provided the context for developing a set of core definitions for research information for the German science system. In this paper, we focus on the data modelling aspects of the project, whereas another submission focuses on the management of the discussion phase and visualization of the argume...

Substitution of Coolant by Using a Closed Internally Cooled Milling Tool

Uhlmann, Eckart ; Riemer, Hendrik ; Schröter, Danny ; Sammler, Fiona ; Richarz, Sebastian (2017)

The saving of raw materials plays a major role in industry and is becoming increasingly important. In the field of cutting technology, the aim is to maximise practices such as the substitution of coolant and the steady increase of tool life in order to make an effective contribution towards environmental protection. Concerning the saving of coolant and to enhance the performance in dry machinin...

A Comparison of Best Practices of Public and Private Support Incentives for the Remanufacturing Industry

Guidat, Thomas ; Seidel, Johnannes ; Kohl, Holger ; Seliger, Günther (2017)

In the context of resource constraints and the negative environmental and social impacts of the linear “take-make-dispose” pattern, remanufacturing offers a promising solution for the transformation of end of life (EOL) goods into products with equal or superior specifications and lifetime as compared with newly produced goods. The increasing success of this new industrial paradigm results from...

Mapping and Integrating Value Creation Factors with Life-cycle Stages for Sustainable Manufacturing

Bilge, Pinar ; Emec, Soner ; Seliger, Günther ; Jawahir, I. S. (2017)

Instead of implementing each element individually, engineers must be aware of multiple interactions among all major value creation factors and their life-cycle stages. Interactions are analyzed by a set of factors and hierarchical levels within a production system based on empirical observations and described in analytical models. Such analyses and missing information about the current conditio...

Towards single-valued polylogarithms in two variables for the seven-point remainder function in multi-Regge kinematics

Brödel, Johannes ; Sprenger, Martin ; Torres Orjuela, Alejandro (2016-12-27)

We investigate single-valued polylogarithms in two complex variables, which are relevant for the seven-point remainder function in super-Yang–Mills theory in the multi-Regge regime. After constructing these two-dimensional polylogarithms, we determine the leading logarithmic approximation of the seven-point remainder function up to and including five loops.

Discrete Yamabe problem for polyhedral surfaces

Kourimska, Hana ; Springborn, Boris (2019-09-13)

We introduce a new discretization of the Gaussian curvature on piecewise at surfaces. As the prime new feature the curvature is scaled by the factor 1/r2 upon scaling the metric globally with the factor r. We develop a variational principle to tackle the corresponding discrete uniformisation theorem – we show that each piecewise at surface is discrete conformally equivalent to one with constant...

Processing Effects on the Formability of Magnesium Alloy Sheets

Bohlen, Jan ; Cano, Guadalupe ; Drozdenko, Daria ; Dobron, Patrik ; Kainer, Karl ; Gall, Sven ; Müller, Sören ; Letzig, Dietmar (2018-02-23)

As a generalized semi-finished product, the use of magnesium sheets requires addressing two major aspects of their processing: their microstructure and texture control, which are both essential for the forming behavior of such sheets during their forming to parts. Further, the processing of such sheets is complex, and therefore expensive, and requires simplification. In this work, magnesium all...

A Way Out of the Bubble Trouble?—Upon Reconstructing the Origin of the Local Bubble and Loop I via Radioisotopic Signatures on Earth

Schulreich, Michael ; Breitschwerdt, Dieter ; Feige, Jenny ; Dettbarn, Christian (2018-02-25)

Deep-sea archives all over the world show an enhanced concentration of the radionuclide 60Fe, isolated in layers dating from about 2.2 Myr ago. Since this comparatively long-lived isotope is not naturally produced on Earth, such an enhancement can only be attributed to extraterrestrial sources, particularly one or several nearby supernovae in the recent past. It has been speculated that these s...

Structural Analysis of a Modern o/w-Emulsion Stabilized by a Polyglycerol Ester Emulsifier and Consistency Enhancers

Dahl, Verena ; Friedrich, Achim ; Meyer, Jürgen ; Venzmer, Joachim ; Belkoura, Lhoussaine ; Strey, Reinhard ; Mayer, Christian ; Michel, Raphael ; Gradzielski, Michael (2018-01-18)

The aim of our work was to study the structure of a typical modern cosmetic oil-in-water emulsion (o/w-emulsion), based on the emulsifier polyglyceryl-3 dicitrate/stearate and glycerylstearate/stearyl alcohol as consistency enhancer. We have used a systematic approach building up the cosmetic emulsion step by step, characterizing all systems by using Small Angle Neutron Scattering (SANS), Diffe...