Design principles and performance of bioresorbable polymeric coronary scaffolds

2009 ◽  
Vol 5 (F) ◽  
pp. F15-F22 ◽  
Author(s):  
James Oberhauser ◽  
Syed Hossainy ◽  
Richard Rapoza
Keyword(s):  
Design Principles ◽  
And Performance

Handover within 3GPP LTE: Design Principles and Performance

2009 ◽  
Author(s):  
Konstantinos Dimou ◽  
Min Wang ◽  
Yu Yang ◽  
Muhammmad Kazmi ◽  
Anna Larmo ◽  
...  
Keyword(s):  
Design Principles ◽  
3Gpp Lte ◽  
And Performance

scholarly journals A Generic Pattern-based Design for Distributed Collaborative Editors

TEM Journal ◽  
2020 ◽  
pp. 633-640
Author(s):  
Asma Cherif
Keyword(s):  
Software Engineering ◽  
Information Sharing ◽  
Design Principles ◽  
Healthcare Education ◽  
Good Design ◽  
Fundamental Step ◽  
Generic Framework ◽  
Coordination Algorithms ◽  
Collaborative Applications ◽  
And Performance

With the advent of information sharing technologies, users can share and collaborate in performing common tasks through the use of distributed collaborative applications. Specifically, Distributed Collaborative Editors (DCE) are more and more used in many fields including healthcare, education, software engineering, military, etc. However, all proposed DCE frameworks focused on coordination algorithms, i.e. how to ensure data convergence, while very little attention was given to addressing the design of DCE which shall be the fundamental step for DCE frameworks construction. In this article, we analyze and design DCE as the structure of five layers comprising classifiers, relations among them, and their main properties. We contribute in two areas. First, we define a generic DCE architecture that captures organization, business and software aspects of DCE. Secondly, we propose a pattern-based design that emphasizes good design principles for the business core of DCE. This design will allow DCE researchers and developers to converge towards the same generic framework while improving the quality and performance of proposed DCE applications and tools.

scholarly journals Beam Pre-Shaping Methods Using Lenslet Arrays for Area-Based High-Resolution Vehicle Headlamp Systems

2020 ◽  
Vol 10 (13) ◽  
pp. 4569
Author(s):  
Yang Li ◽  
Marvin Knöchelmann ◽  
Roland Lachmayer
Keyword(s):  
High Resolution ◽  
Design Principles ◽  
Beam Shaping ◽  
Light Distribution ◽  
Distribution Area ◽  
New Methods ◽  
Lenslet Array ◽  
And Performance ◽  
Illumination Efficiency

High-resolution light distributions are lately in demand for vehicle headlamp systems as an innovative lighting approach. This lighting approach can realize functionalities, such as precise glare avoidance and on-road projection, which are useful for improving traffic comfort and safety. For achieving the required high-resolution light distribution, area-based projection technologies, such as DMD, LCD, and LCoS, are considered to be integrated into such headlamps. These projection devices demand rectangular illumination areas with specific light distributions to fulfill the requirements for illumination efficiency and performance in headlamp systems. Lenslet arrays, based on the principle of Köhler illumination, can effectively homogenize the light and shape it into rectangular shapes simultaneously. Such components are widely used in projection applications. However, they also show functional potentialities to be applied in high-resolution headlamps. This paper explains the design principles and methods of lenslet arrays for beam pre-shaping in headlamp systems. It validates the homogenization using a self-designed and manufactured lenslet array in a demonstrator in the first place. Afterward, this paper introduces two new methods for the centralized beam shaping required by some headlamps. These methods are validated by optical simulations.

scholarly journals In search of design principles for developing digital learning & performance support for a student design task

2015 ◽  
Vol 31 (5) ◽  
Author(s):  
Lars Bollen ◽  
Hans Van der Meij ◽  
Henny Leemkuil ◽  
Susan McKenney
Keyword(s):  
Design Principles ◽  
Learning Performance ◽  
Performance Support ◽  
Digital Learning ◽  
Design Task ◽  
Core Set ◽  
Design Activities ◽  
Backbone Structure ◽  
And Performance ◽  
Learning And Performance

<p class="AJETAbstract">A digital learning and performance support environment for university student design tasks was developed. We describe the design rationale, process, and the usage results to arrive at a core set of design principles for the construction of such an environment and present a collection of organisational, technical, and course-related requirements that led to the particular setup of the targeted environment. Building upon the established learning management system Moodle, we designed a backbone structure that fitted onto the analysis, synthesis, construction, and evaluation intervention model. Within these four phases, students were able to find activity checklists, tools, and information to support their design activities. The environment was supplemented with tools for group communication and collaborative report writing. It has been used for 5 weeks by 35 students who worked in groups on a design task. We analysed the students’ appraisals for usability and examined usage data from their action logs. Results indicate that students were positive about the environment and generally used its facilities frequently. The discussion revolves around the issue of how to achieve a balance between constraints, freedom, and scaffolding. A set of design principles is proposed for the construction of future versions of a learning and performance support environment.</p>

Safety and Design Principles for Use in a Risk-Informed, Technology-Neutral Design and Licensing Framework for New Nuclear Plants

2009 ◽  
Author(s):  
Jim Chapman ◽  
Stephen M. Hess
Keyword(s):  
Design Principles ◽  
Current Generation ◽  
Light Water ◽  
Integrated Framework ◽  
Nuclear Plants ◽  
Underlying Basis ◽  
Water Reactors ◽  
Near Term ◽  
Reactor Types ◽  
And Performance

The regulatory framework for the current generation of operating plants and advanced light water reactors (ALWRs) planned for near term construction has evolved over several decades to permit effective regulation of the light water reactor (LWR) designs. To address other reactor types, development of a framework that possesses the attributes of being technology neutral, risk-informed and performance-based is ongoing by several U.S. and international organizations. To support development of a revised framework, the Electric Power Research Institute (EPRI) conducted research to identify and assess specific elements of the proposed possible frameworks; to develop a preliminary integrated framework based on the results of this review and evaluation; and to provide recommendations in areas where additional development and testing would appear to be most beneficial. This research identified Fundamental Safety Principles (FSPs) and Fundamental Design Principles (FDPs) to be the cornerstones that provide the underlying basis for the proposed integrated framework. FSPs provide the safety objectives which are to be achieved. Associated with each FSP is a corresponding FDP that provides mechanisms by which achievement of the FSP can be demonstrated. In this paper we describe the 11 FSPs and associated FDPs that were developed. We note that these FSPs / FDPs are for the most part consistent with comparable criteria provided in the frameworks which were reviewed. The results of this research have been and are being used to support ongoing industry efforts to develop applicable standards and guidance for licensing of advanced plants (Generation 3 Plus and 4) that address safety characteristics which differ from the current generation of plants and advanced LWRs.

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