3,445 research outputs found
Semantic Modelling of eSolutions Using a View Formalism with Conceptual and Logical Extensions
No full textIn industrial informatics, there exists a requirement to model and design views at a higher level of abstraction. Since the classical view definitions are only available at the query or instance level, modelling and maintaining such views for complex enterprise information systems (EIS) is a challenging task. Further, the introduction of semi-structured data (namely XML) and its rapid adaptation by the commercial and industrial systems increased the complexity for view design and specification. To address such and issue, in this paper we present; (a) a layered view model for XML, (b) a design methodology for such views and (c) some real-world industrial applications of the view model. The XML view formalism is defined at the conceptual level and the design methodology is based on the XML semantic (XSemantic) nets, a high-level object-oriented (OO) modelling language for XML domains
Suppression of the Pth(Ts) phenotype mediated by the overproduction of tRNA maintains moderate levels of the Pth(Ts) protein
No full text<p><b>Copyright information:</b></p><p>Taken from "Excess of charged tRNA maintains low levels of peptidyl-tRNA hydrolase in (Ts) mutants at a non-permissive temperature"</p><p>Nucleic Acids Research 2006;34(5):1564-1570.</p><p>Published online 15 Mar 2006</p><p>PMCID:PMC1408313.</p><p>© The Author 2006. Published by Oxford University Press. All rights reserved</p> () Depicts the cellular growth of the (Ts) mutant strain AA7852 separately transformed with pVH124 (ΔU, ΔV), pVH125 (U, ΔV) or pVH119 (U, V) incubated at different temperatures. Isolated colonies of the independent transformants were streaked onto LB-Ap plates and incubated overnight at the indicated temperatures. () Presents the immunodetection of Pth(Ts) in the (Ts) mutant strain AA7852 separately transformed with pVH124, pVH125, pVH119, ptRNACCA (X, R, T, M) or pTH2 (W) and grown at 32°C prior to transfer at time = 0 min at 41 or 43°C. The concentration of Pth(Ts) protein was estimated by immunoblot analysis. The left lane shows purified wild-type Pth protein, which migrates slightly faster in SDS–PAGE than the Pth(Ts) variant (arrowed) ()
Emergence of oblique TS mode due to longitudinal wall oscillation in 2D channel flow
No full textStabilizing effects of wall oscillation on two dimensional (2D) Tollmein-Schlichting (TS) waves and oblique TS waves developing in 2D channel flow are numerically investigated using the Floquet method. It was shown from the previous study[1] that the wall oscillation mostly has stabilizing effect and then TS mode is occasionally more stable than the oblique mode. In the present study the characteristics of the stability are investigated in detail. Then it is cleared that the exchange of the most unstable mode form the 2D TS to the oblique TS can occur at a certain value of Reynolds number
A set of nine principles for distributed-design information storing
No full textThe issues of distributed working are many, with problems relating to information access and information acquisition the most common (Crabtree et al., 1997). Keeping track of project and team information is becoming more complex as design is increasingly being carried out collaboratively by geographically dispersed design teams across different time zones. The literature notes that little prescription or guidance exists on information management for designers (Culley et al., 1999) and Hicks (2007) highlights a relative lack of overall principles for improving information management. Additionally, evidence from earlier studies by the author into ‘How information is stored in distributed design project work’ reinforces the need for guidance, particularly in a distributed context (Grierson, 2008). Distributed information collections were found to be unorganised, contained unclear information and lacked context. Storing and sharing of distributed information was often time consuming and the tools awkward to use. This can lead to poor project progress and can impact directly on the quality and success of project outcomes (Grierson et al., 2004, 2006). This paper seeks to address these issues by presenting the development, implementation and evaluation of a set of Principles and a Framework to support distributed design information storing in the context of a Global Design class. Through both quantitative and qualitative evaluation methods the Principles were found to help in a number of ways – with the easy access of information; the structuring and organising of information; the creation of an information strategy; the making of information clear and concise; the supporting of documentation during project work; and the strengthening of team work; all helping teams to work towards project outcomes
A TS uszályhíd kifejlesztése és alkalmazása
No full textThe essay focuses on the history of floating bridges and their special situation in Hungary. It produces the main elements and building procedures of the TS barge bridge. The author writes an appreciation of the TS barge bridge designers.The essay focuses on the history of floating bridges and their special situation in Hungary. It produces the main elements and building procedures of the TS barge bridge. The author writes an appreciation of the TS barge bridge designers
The new CEN/TS 19100: Design of glass structures
No full textSince the beginning of 2021, CEN/TS 19100 Design of Glass Structures has been available in its first three parts. The fourth part is expected soon. This Technical Specification of the European standards organisation CEN is as a pre-standard of a corresponding future Eurocode. These documents constitute the first ever comprehensive design code for the entire structural glass engineering field on the European market for the first time. In addition to a clear outline, the Technical Specification has been drafted to be compatible with EN 1990 “Basis of Design” and to address glass-specific design matters, particularly related to robustness and redundancy. Although the standard still has the status of a CEN/TS, thereby allowing the European nations the option of whether to introduce it, either in full or in parts, it already contains national openings through which the European countries can adapt the design results to their own safety level by National Determined Parameters (NDPs). Such an approach already anticipates the future Eurocode, which is expected to be published as EN 19100—Design of Glass Structures. This article provides some context on the history and concept behind the new documents and gives an overview of the design rules and the corresponding technical background of the different parts of CEN/TS 19100.Applied MechanicsArchitectural Technolog
DEco Arch: Trust and Reputation Aware Service Brokering in Digital Ecosystems
No full textAwareness of social ratings such as reputation, credibility and trustworthiness plays a key role in digital ecosystems where autonomous agents collaborate in order to publish their services or search for services. The integration of these social ratings along with attribute matching presents a novel approach and strengthens stability and confidence in autonomous distributed communities. This ensures that the selection of the optimal service is guaranteed while minimizing general security and business related risks. In this paper we discuss a framework for service registration which is hosted in a P2P environment. Service consumers can discover services which are grouped based on their contexts. Both, services and group alliances are defined through semantically enriched metadata and social rating
Development of EMT/TS Co-simulation Using PowerFactory and PSS/E
No full textAs the scale and complexity of power systems increase, simulating them in efficient and accurate ways continues tobe a challenge in power systems engineering. Electromagnetic Transient (EMT) and Transient Stability (TS) simulation are the two main dynamic power system simulation methods. To simulate large and complex power systems in sufficient detail without sacrificing execution time, one of the idea is to perform a co-simulation that couples EMT and TS simulator. Although several attempts have been made to couple both simulator, only on rare occasions do these hybrid EMT-TS simulators couple two or more industry-adopted simulation tools.The objective of this thesis is to to develop and study the benefits and limitations of the Electromagnetic Transient – Transient Stability co-simulation based on PowerFactory and PSS/E, both of which are among the most extensively used simulation tools in industry and academia alike. With regards to the objective, the EMT-TS co-simulation using PowerFactory and PSS/E has been developed. Then, several tests are performed to evaluate the function of each composing part of the EMT-TS co-simulation, and to test the integration between all its component. Next, The developed co-simulation is applied to study cases and the results are compared to a monolithic EMT simulation to evaluate its accuracy and execution time. Furthermore, the effect of TS and EMT time step to the accuracy and execution time of EMT-TS co-simulation have also been investigated.The study case results show that the developed EMT-TS co-simulation has not been beneficial yet in terms of accuracy and execution time. Although the active power result shows a similar tendency with the monolithic EMT result, the difference between both are visible. The difference between both are more prominent in the reactive power result. The total execution time of the developed co-simulation in the study cases are in the range of 23-24 minutes, significantly larger than the total execution time obtained from the monolithic EMT simulation which is around of 12s. Also, it is found that reducing the TS time step from 0.02 s to 0.01 s slightly increases the total simulation time from 23 to 26 minutes. However, it does not contribute a significant improvement on the accuracy of the developed EMT-TS co-simulation. The result obtained from reducing the EMT time step to is the same with the result obtained using EMT time step. Moreover, the reduction of the EMT time step significantly increases the total simulation time from 23 to 42 minutes. The developed co-simulation still has a lot of room for improvement and further developments in this topic might increase its performance.Electrical Engineering | Sustainable Energy Technolog
Application of Fuzzy Inference Systems in Real World Scenarios
No full textThe use of computing technologies by humans for various knowledge processing and knowledge synthesis activities has grown exponentially in the recent past. One of the obvious reasons for this trend is the ease with which information is obtained, processed and computed to obtain the desired analysis. Some real-world examples of such tasks include control of a train (for example on the Sendai Subway System) [1], control of heating and cooling devices [2], signal processing [3], controlling different functions of an aircraft [4] etc. At the same time, there has also been a change in the type of users who depend on such computing technologies for information. Users range from the experienced to the intermediate or novice group of users, who are not interested in knowing the complex computations by which information is processed, but want the desired output from the computations in order to carry out various tasks. For such tasks, it is of critical importance that decision making by machines be done with the utmost precision based on an understanding of the current input scenarios. In other words, machines have to mimic the real-time decision making capability of humans so as to conduct an intelligent analysis of the underlying complex information, synthesize knowledge from it, and act on it for various activities.No Full Tex
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