Papers by Keyword: Open Source

Abstract: New groove pass series for long products must be developed by backward engineering starting with the necessary mechanical properties and geometry of the final shape, with a highly iterative manual effort and with numerous manual decisions. Usually, established groove sequences are adopted in this process without consideration of material requirements of the rolled materials and work roll limitations, while other groove shapes may provide better final results. In order to achieve precision in the material flow, time-consuming FE-Methods are already being used in the reverse engineering. The aim of the presented fast approach is to obtain an optimal roll contour for simple irregular groove sequences using generalized, roll-technical justified and experimentally evaluated design criteria coupled with a fast 3D approach for stress state, material flow and fast approaches for the assessment of the elastic stress state resp. work safety of the rolls. By direct coupling the material flow calculation e.g. with fast microstructure models the microstructure development and the required end properties are integrated into the optimization process. Parts of the calculation code discussed are available via the open source project PyRolL which is continuously updated by the Center of Groove Pass Design of TU Bergakademie Freiberg and free available within the terms of the BSD-3-Clause License [1]. The Python-based framework allows maximum adaptability to own needs via a flexible plugin system for inclusion of own models and routines.

Abstract: Content Management System (CMS) is one of the most widely used online system. In this paper, we design a lightweight CMS named Yescms, which can be easy to extend and deploy for specific purpose. Content management and user management are the core modules of Yescms. Additionally, we develop Yescms based on the open source technologies, Model-View-Control architectural pattern and role-based access control.

Abstract: This paper design and implement a J2EE application development platform based on open source technology by studying on Paoding-Rose, Spring, Mybatis, Activiti and other open source technologies. The platform can improve enterprise capabilities of independent research and development IT system.

Abstract: Cloud computing is becoming a mainstream aspect of information technology. How to efficiently manage the cloud resources across multiple cloud domains is critical for providing continuous cloud services. This paper introduces the principle and review recent research progress on cloud service to support network virtualization. It presents a framework of network-Cloud convergence based on data center network and gives a survey on key technologies for realizing cloud center and service; the reliability of cloud applications can be greatly improved.

Abstract: In recent years, the rapid development of information and electronic technology has attracted a lot of suppliers to produce many different sensor devices. This results in a lower price of these sensor devices. Consequently, the application of these control systems is getting popular. In the popularization process of these important information and electronic technology, there is a group of self-less and enthusiastic designers, who release their important research outcomes as Open Source resources. These resources are available to other people and free of charge. In addition to benefitting the users, more various-fields enthusiastic participants are attracted to dedicate themselves to the development of these Open Source resources through this benign interactive way. This leads to a more quickly and more perfect development of the Open Source applications in different fields. The trend of applying Open Source resources to the development in the area of Unmanned Aerial Vehicle (UAV) and Digital photogrammetric processing is clearly and significant. This study focuses on the surveying of different Open Source resources for constructing a UAV-based photogrammetric data acquisition system. Many available Open Source resources used to construct this system are surveyed, such as the UAV flight control technology and the capture and post processing technology for the digital aerial photos. Two types of UAV photogrammetric data acquisition system based on Open source resources are accomplished as well.

Abstract: In this paper, a DIO training kit developed for fundamental embedded system learning was presented. The jobs of the research comprised the developments of a microcontroller board, four DIO functional modules with multiplexing circuit, and some control software. At present, the DIO training kit was implemented on an experimental breadboard. The integration and verification of hardware and software were conducted successfully. The results showed that the DIO training kit for Arduino platform are extremely suitable to support the Arduino based embedded systems training.

Abstract: The rapid establishment of current technology is dependent on the effective integration of interdisciplinary science. Hence the R & D persons with multiple domain skills are strongly required for most industries. Although, the skills training for students of Vocational-Technical College and general University cannot stratify with the above need for industry. Based on the fact of drawing is the common language of industry, the designer, manufacturer, or quality control and inspection personnel use the language to communicate to each other for solving operational problems. Therefore, the purpose of this work is to train non-engineering students can learn simple mechanical drawing skills and recognize drawings. The training includes using multimedia and 3D graphic technique to write a python (open source language) program for establishing a 3D interactive graphics of a motocross suspension mechanism. As results, the students can transform visual information of the topological structure of a suspension mechanism to the dynamic digital interactive graphic. The results also show this practical technical education and training can improve the ability of non-engineering students to meet the industrial requirements.

Abstract: Corrosion simulation of rebar in concrete structures using BEM 3D have been developed. However, pre processing procedure such as geometry development and meshing is still performed manually. In addition, the visualization of BEM simulation results is still illustrated using the simple chart and graph. Nowadays, many softwares have been developed under open source platform that can be used freely. There is open source softwares for CAE purposes such as Salome and VisIt. The aim of this study is to implement the open source software as pre- and post-processing for the developed BEM 3D code in order to simulate corrosion of reinforced concrete. Salome 2.3.9 is used for developing geometry and meshing the model. The visualization of the simulation results are conducted using VisIt 1.8. The study shows that the open source software i.e. Salome and VisIt, perform well as pre and post processing of developed code for simulating the corrosion of reinforced concrete. It shows that the meshing procedure and the interpretation of results become simpler and easier.

Abstract: Self-assembled amphiphile systems are utilized in a wide variety of applications including drug delivery and energy storage. Nano-scale physical and chemical interactions govern the packing of self-assembled amphiphilic molecules, resulting in thermodynamically stable phases of defined geometries. Possible phases include micellar, hexagonal, cubic, lamellar and sponge phases. The internal nano-structure of the amphiphile self-assembly materials plays an important role in the properties of these systems and their application. To date small angle x-ray scattering (SAXS) has been the most common technique used to characterise their structure. We explore positron annihilation lifetime spectroscopy (PALS) as an alternative and/or complementary technique for this purpose, using the phytantriol/water system. While PALS is a well established technique for characterising many materials, the coexistence of aqueous and hydrophobic regions in a soft self-assembled amphiphile material poses a challenge to the analysis and interpretation of the results. In order to alleviate these difficulties we developed a computer program for general-purpose PALS data analysis called PAScual. Amongst the most salient features of this new code are the possibility to perform bounded fits and the option of using advanced algorithms to provide a more robust and unbiased fit: on the one hand, it incorporates a global nonlinear optimisation routine based on the Simulated Annealing algorithm and, on the other hand it gives information on the reliability of the results by means of a Markov Chain Monte-Carlo Bayesian Inference method. In this work we present the newly developed PALS data analysis techniques as well as the results for the phytantriol/water system, comparing them with additional data obtained from complementary techniques.