A Structural Analysis of SLAs and Dependencies Using Conceptual Modelling Approach

2013 ◽  
Author(s):  
William W. Song ◽  
Aijaz Soomro ◽  
Yang Li ◽  
Qin Liu
Keyword(s):  
Structural Analysis ◽  
Conceptual Modelling ◽  
Modelling Approach

scholarly journals Easing ĐApp Interaction for Non-Blockchain Users from a Conceptual Modelling Approach

2020 ◽  
Vol 10 (12) ◽  
pp. 4280 ◽  
Author(s):  
Miguel A. Teruel ◽  
Juan Trujillo
Keyword(s):  
User Interface ◽  
Software Architecture ◽  
Previous Analysis ◽  
Conceptual Modelling ◽  
Interface Elements ◽  
Time Control ◽  
Web App ◽  
The Relationship ◽  
Modelling Approach

Blockchain decentralized applications (ÐApp’s) are applications which run on blockchains nodes. Thus, to interact directly with this sort of applications, users need to have a blockchain address, wallet, and knowledge about how to make transactions to interact with ÐApp’s. Therefore, the knowledge required to use a ÐApp can easily make users to desist when trying to interact with them. To tackle this issue, we propose a software architecture that will be in the middle of the user and the ÐApp, thus making users initially unaware of the fact that they are interacting with a ÐApp. This is achieved by analyzing the relationship between ÐApps and Apps by using UML modelling. Next, based on the previous analysis, we created a middleware for users to interact with a ÐApp in the same manner they do with a traditional web app, i.e., by using usernames, passwords and user interface elements instead of addresses, private keys or transactions. To put the developed middleware into practice, we developed a ÐApp that makes use of it. This ÐApp registers the time control of workers from companies by using blockchain to store the data in a secure and non-modifiable manner. Finally, we performed an experiment, thus demonstrating that a ÐApp that implements the proposed middleware would improve its usability for users with no experience with blockchain.

scholarly journals Predictive optimal control of sewer networks using CORAL tool: application to Riera Blanca catchment in Barcelona

2009 ◽  
Vol 60 (4) ◽  
pp. 869-878 ◽  
Author(s):  
V. Puig ◽  
G. Cembrano ◽  
J. Romera ◽  
J. Quevedo ◽  
B. Aznar ◽  
...  
Keyword(s):  
Optimal Control ◽  
Local Control ◽  
Software Tool ◽  
Conceptual Modelling ◽  
Time Model ◽  
Global Control ◽  
Control Approach ◽  
Sewer Network ◽  
Sewer Networks ◽  
Modelling Approach

This paper deals with the global control of the Riera Blanca catchment in the Barcelona sewer network using a predictive optimal control approach. This catchment has been modelled using a conceptual modelling approach based on decomposing the catchments in subcatchments and representing them as virtual tanks. This conceptual modelling approach allows real-time model calibration and control of the sewer network. The global control problem of the Riera Blanca catchment is solved using a optimal/predictive control algorithm. To implement the predictive optimal control of the Riera Blanca catchment, a software tool named CORAL is used. The on-line control is simulated by interfacing CORAL with a high fidelity simulator of sewer networks (MOUSE). CORAL interchanges readings from the limnimeters and gate commands with MOUSE as if it was connected with the real SCADA system. Finally, the global control results obtained using the predictive optimal control are presented and compared against the results obtained using current local control system. The results obtained using the global control are very satisfactory compared to those obtained using the local control.

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