scholarly journals Commentary—The Role of Performance Metrics for Parallel Mathematical Programming Algorithms

1993 ◽  
Vol 5 (1) ◽  
pp. 26-28 ◽  
Author(s):  
Donald L. Miller ◽  
Joseph F. Pekny
Keyword(s):  
Mathematical Programming ◽  
Performance Metrics ◽  
Programming Algorithms

scholarly journals MATHEMATICAL PROGRAMMING APPLICATIONS PECULIARITIES IN SHAKEDOWN PROBLEM/MATEMATINIO PROGRAMAVIMO TAIKYMO KONSTRUKCIJŲ PRISITAIKYMO UŽDAVINIUOSE YPATUMAI

2001 ◽  
Vol 7 (2) ◽  
pp. 106-114
Author(s):  
Ela Chraptovič ◽  
Juozas Atkočiūnas
Keyword(s):  
Mathematical Programming ◽  
Optimization Problems ◽  
Optimality Criteria ◽  
Point Of View ◽  
Design Matrix ◽  
Problem Solution ◽  
Strain Compatibility ◽  
Complete Set ◽  
Mechanical Interpretation

The theory of mathematical programming widely spread as a method of a solution of extreme problems. It accompanies the study of plastic theory problem from its posing up to final solution. However, here again from our point of view not all possibilities are realized. Unfortunately, the use of mathematical programming as an instrument of a numerical solution for structural analysis frequently is also restricted by that. The possibilities of mechanical interpretation of optimality criteria of applied algorithms are not uncovered. The global solution of the problem of mathematical programming exists, if Kuhn-Tucker conditions are satisfied. These conditions do not depend on the applied algorithm of a problem solution. The identity of Kuhn-Tucker conditions with a optimality criteria of Rosen algorithm is finding out in this research. The role of a design matrix for the creating of strain compatibility equations is clarified. The Kuhn-Tucker conditions mean the residual strain compatibility equations in analysis of elastic-plastic systems. It is proved in the article that for problems of limiting equilibrium the Kuhn-Tucker conditions include the dependences of the associated law of plastic flow. The Kuhn-Tucker conditions together with limitations of a source problem of account represent a complete set of dependences of the theory of shakedown. The correct mathematical and mechanical interpretation of the Kuhn-Tucker conditions allows to refuse a direct solution of a dual problem of mathematical programming. It makes easier the solution of optimization problems of structures at shakedown.

Predictably Predictable -  The Role of Catchment Characteristics and Complexity.

2021 ◽  
Author(s):  
Sophia Eugeni ◽  
Eric Vaags ◽  
Steven V. Weijs
Keyword(s):  
Water Resource Management ◽  
Performance Metrics ◽  
Complexity Analysis ◽  
Model Performance ◽  
Principal Component ◽  
The United States ◽  
Hydrologic Model ◽  
Hydrologic Models ◽  
Hydrologic Modelling

<p>Accurate hydrologic modelling is critical to effective water resource management. As catchment attributes strongly influence the hydrologic behaviors in an area, they can be used to inform hydrologic models to better predict the discharge in a basin. Some basins may be more difficult to accurately predict than others. The difficulty in predicting discharge may also be related to the complexity of the discharge signal. The study establishes the relationship between a catchment’s static attributes and hydrologic model performance in those catchments, and also investigates the link to complexity, which we quantify with measures of compressibility based in information theory. </p><p>The project analyzes a large national dataset, comprised of catchment attributes for basins across the United States, paired with established performance metrics for corresponding hydrologic models. Principal Component Analysis (PCA) was completed on the catchment attributes data to determine the strongest modes in the input. The basins were clustered according to their catchment attributes and the performance within the clusters was compared. </p><p>Significant differences in model performance emerged between the clusters of basins. For the complexity analysis, details of the implementation and technical challenges will be discussed, as well as preliminary results.</p>

Expanding Role of Telephone Systems in Healthcare

2017 ◽  
pp. 564-598
Author(s):  
Jing Shi ◽  
Ergin Erdem ◽  
Heping Liu
Keyword(s):  
Performance Metrics ◽  
Healthcare Delivery ◽  
Patient Acceptance ◽  
Patient Centered ◽  
Healthcare Settings ◽  
Challenges And Opportunities ◽  
Centered Care ◽  
The Cost ◽  
Telephone Systems

The telephone systems in healthcare settings serve as a viable tool for improving the quality of service provided to patients, decreasing the cost, and improving the patient satisfaction. It can play a pivotal role for transformation of the healthcare delivery for embracing personalized and patient centered care. This chapter presents a systematic review of new developments of healthcare telephone system operations in various areas such as tele-health. Current research on topics such as tele-diagnosis, tele-nursing, tele-consultation is outlined. Specific issues associated with the emerging applications such as underreferral, legal issues, patient acceptance, on-call physician are discussed. Meanwhile, the architecture and underlying technologies for healthcare telephone systems are introduced, and the performance metrics for measuring the system operations are provided. In addition, challenges and opportunities related with improving the healthcare telephone systems are identified, and the potential opportunities of optimizing these systems are pointed out.

Culturally relevant constructionist design: exploring the role of community in identity development

2020 ◽  
Vol 121 (11/12) ◽  
pp. 847-867
Author(s):  
Sawaros Thanapornsangsuth ◽  
Nathan Holbert
Keyword(s):  
Identity Development ◽  
Low Income ◽  
Culturally Relevant ◽  
Performance Metrics ◽  
Community Members ◽  
Content Type ◽  
Maker Education ◽  
First Case ◽  
Cultural Connections

Purpose Many initiatives seek to engage children in maker education. However, there is a paucity of research examining children’s engagement in making in low-income formal school settings. Likewise, little work has been done to explore the transformative perspectives of both the children and the people around them. This study aims to explore a Culturally Relevant Constructionist Design framework that emphasizes making as a way of building connections to ones’ community. The participants’ shifting perspectives and receptivity in engaging in maker activities that involve making inventions for their community, inspired by the nation’s most beloved figure, King Bhumibol are evaluated. Design/methodology/approach This study investigates fourth-grade students, a teacher and community members around a public school in Thailand. Using qualitative research methods, data collection includes interviews, field notes observation, photos and videos of the sessions. This paper presents three case studies that represent the shifting perspectives and receptivity of teachers, community members and students through engaging in making experience. The first case illustrates the ways in which building for others supports the students’ formation of an identity of a creator. The two cases describe a teacher and a community member who developed new-found perceptions of students as valuable contributors to the community. Findings The findings highlight making inventions for the community as ways to connect teachers, community members and students together. The study also identifies key perceptions and experiences that empower students’ as contributors to their community. Through the process of making, the teacher and the community members also developed new-found positive perspectives of the students. Particularly, they viewed the students beyond traditional school performance metrics, and considered their other latent abilities. Practical implications This study discusses these findings in light of previous research on maker education especially in low-income communities. It also showcases the role of making for the betterment of the community as a tool for engendering change in schools and empowering students to design and make personally and socially meaningful projects. The study also highlights how design-based research carried out in the international context, particularly in Thai locality and classrooms. Originality/value This study argues against the deficit lens that assumes a low sense of expectation for what students from lower-income schools can do. Students hold unique worldviews that lead them to create innovations relevant to their local and cultural needs. The study addresses this gap by designing a framework that emphasizes making relevant cultural connections to students’ communities. The study also showcases maker-centered experiences that enable students to express their ideas, to cultivate relationships, to help others and to see themselves in new ways. The perspectives of the participants hold implications beyond the predominant focus of maker education initiatives.

scholarly journals Table Tennis Ball Impacting Racket Polymeric Coatings: Experiments and Modeling of Key Performance Metrics

2019 ◽  
Vol 9 (1) ◽  
pp. 158 ◽  
Author(s):  
Renaud G. Rinaldi ◽  
Lionel Manin ◽  
Sébastien Moineau ◽  
Nicolas Havard
Keyword(s):  
Performance Metrics ◽  
Incident Angle ◽  
Mechanical Analysis ◽  
Tennis Ball ◽  
Table Tennis ◽  
Polymeric Coatings ◽  
Compression Tests ◽  
Compliant Behavior ◽  
The Impact

The performance of a table tennis racket is often associated with subjective or quantitative criteria such as the adhesion, the control and the speed. Overall, the so-called performance aims at characterizing the impact with the ball. Ultimately, the polymeric layers glued onto the wooden blade play a key role, as evidenced in a previous work where the normal linear (no spin) impact of a ball onto polymeric layers was experimentally and numerically investigated. In this work, more realistic loading conditions leading to varying the incident angle and spin of the ball, were explored. While the sole linear restitution coefficient was determined in the anterior normal impact study, new physical metrics were identified to describe fully the trajectory of the reflected ball after impact. A companion 3D finite elements model was developed where the polymeric time-dependent dissipative compliant behavior measured with dynamic mechanical analysis and compression tests was accounted for. The confrontations with the experimental data highlighted the key role of the polymer intrinsic properties along with the friction coefficient between the ball and the polymer external layer.

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