A Uniform Model to Express the Behaviour of Rules with Different Semantics

1996 ◽  
pp. 190-208 ◽  
Author(s):  
Sara Comai ◽  
Piero Fraternali ◽  
Giuseppe Psaila ◽  
Letizia Tanca
Keyword(s):  
Uniform Model

scholarly journals Ground volume assessment using ’Structure from Motion’ photogrammetry with a smartphone and a compact camera

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
Rafał Wróżyński ◽  
Krzysztof Pyszny ◽  
Mariusz Sojka ◽  
Czesław Przybyła ◽  
Sadżide Murat-Błażejewska
Keyword(s):  
Open Source Software ◽  
Structure From Motion ◽  
Point Cloud ◽  
Field Measurements ◽  
Video Frames ◽  
Actual Volume ◽  
Volume Assessment ◽  
Uniform Model ◽  
Free Open Source ◽  
Test Embankment

AbstractThe article describes how the Structure-from-Motion (SfM) method can be used to calculate the volume of anthropogenic microtopography. In the proposed workflow, data is obtained using mass-market devices such as a compact camera (Canon G9) and a smartphone (iPhone5). The volume is computed using free open source software (VisualSFMv0.5.23, CMPMVSv0.6.0., MeshLab) on a PCclass computer. The input data is acquired from video frames. To verify the method laboratory tests on the embankment of a known volume has been carried out. Models of the test embankment were built using two independent measurements made with those two devices. No significant differences were found between the models in a comparative analysis. The volumes of the models differed from the actual volume just by 0.7‰ and 2‰. After a successful laboratory verification, field measurements were carried out in the same way. While building the model from the data acquired with a smartphone, it was observed that a series of frames, approximately 14% of all the frames, was rejected. The missing frames caused the point cloud to be less dense in the place where they had been rejected. This affected the model’s volume differed from the volume acquired with a camera by 7%. In order to improve the homogeneity, the frame extraction frequency was increased in the place where frames have been previously missing. A uniform model was thereby obtained with point cloud density evenly distributed. There was a 1.5% difference between the embankment’s volume and the volume calculated from the camera-recorded video. The presented method permits the number of input frames to be increased and the model’s accuracy to be enhanced without making an additional measurement, which may not be possible in the case of temporary features.

Analytical Model of the Efficiency of Spur Gears: Study of the Influence of the Design Parameters

2011 ◽  
Author(s):  
Miguel Pleguezuelos ◽  
Jose´ I. Pedrero ◽  
Miryam B. Sa´nchez
Keyword(s):  
Load Distribution ◽  
Gear Ratio ◽  
Design Parameters ◽  
Spur Gears ◽  
Transmitted Power ◽  
Power Losses ◽  
Contact Ratio ◽  
Complete Study ◽  
Uniform Model ◽  
Analytical Expressions

An analytic model to compute the efficiency of spur gears has been developed. It is based on the application of a non-uniform model of load distribution obtained from the minimum elastic potential criterion and a simplified non-uniform model of the friction coefficient along the path of contact. Both conventional and high transverse contact ratio spur gears have been considered. Analytical expressions for the power losses due to friction, for the transmitted power and for the efficiency are presented. From this model, a complete study of the influence of some design parameters (as the number of teeth, the gear ratio, the pressure angle, the addendum modification coefficient, etc.) on the efficiency is presented.

scholarly journals Federated Learning in Big Data Application and Sharing

2020 ◽  
Author(s):  
Jing Yang ◽  
Quan Zhang ◽  
Kunpeng Liu ◽  
Peng Jin ◽  
Guoyi Zhao
Keyword(s):  
Big Data ◽  
Data Privacy ◽  
The State ◽  
Ideal Model ◽  
Local Data ◽  
Data Safety ◽  
Big Data Applications ◽  
Data Application ◽  
Big Data Application ◽  
Uniform Model

In recent years, electricity big data has extensive applications in the grid companies across the provinces. However, certain problems are encountered including, the inability to generate an ideal model using the isolated data possessed by each company, and the priority concerns for data privacy and safety during big data application and sharing. In this pursuit, the present research envisaged the application of federated learning to protect the local data, and to build a uniform model for different companies affiliated to the State Grid. Federated learning can serve as an essential means for realizing the grid-wide promotion of the achievements of big data applications, while ensuring the data safety.

scholarly journals Opportunity Costs in the Game of Best Choice

10.37236/8322 ◽  
2019 ◽  
Vol 26 (1) ◽  
Author(s):  
Madeline Crews ◽  
Brant Jones ◽  
Kaitlyn Myers ◽  
Laura Taalman ◽  
Michael Urbanski ◽  
...  
Keyword(s):  
Decision Making ◽  
Classical Case ◽  
Secretary Problem ◽  
Sequential Decision Making ◽  
Opportunity Costs ◽  
Sequential Decision ◽  
Probability Of Success ◽  
Uniform Model ◽  
Weighted Model ◽  
Over Time

The game of best choice, also known as the secretary problem, is a model for sequential decision making with many variations in the literature. Notably, the classical setup assumes that the sequence of candidate rankings is uniformly distributed over time and that there is no expense associated with the candidate interviews. Here, we weight each ranking permutation according to the position of the best candidate in order to model costs incurred from conducting interviews with candidates that are ultimately not hired. We compare our weighted model with the classical (uniform) model via a limiting process. It turns out that imposing even infinitesimal costs on the interviews results in a probability of success that is about 28%, as opposed to 1/e (about 37%) in the classical case.

Contemporary trends in professional development of teachers: importance of recognising the context

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ali Nawab ◽  
Kerry Bissaker ◽  
Al Karim Datoo
Keyword(s):  
Professional Development ◽  
Reform Initiatives ◽  
Content Type ◽  
Resource Information ◽  
Time Period ◽  
Uniform Model ◽  
Teachers Professional Development ◽  
Major Argument ◽  
Education Resource ◽  
Quality Professional Development

PurposeWhereas the achievement of students has closely been linked with the quality of teachers and there is a bulk of literature supporting the need of teachers' preparation in enhancing their quality, professional development (PD) of teachers has been a central focus of reform initiatives in education across the globe. This paper aims at analysing the existing literature on PD of teachers to reflect on the models and characteristics of effective PD, and to highlight the importance of context in PD of teachers.Design/methodology/approachTo respond to the aim of the paper, a search in the field of pedagogy in Education Resource Information Centre (ERIC) was undertaken. The search strings used were “models of teachers' professional development”, “characteristics of teachers professional development” and “context in professional development” restricted to time period from 2000 to 2020.FindingsThe major argument this paper presents is that the models and characteristics of PD are relative and there is no uniform model to be implemented across contexts. Instead of debating the models and characteristics of effective PD, academics and practitioners have to be watchful to the context and the real needs of teachers in a particular context.Originality/valueThe paper critiques the generalisation of Western generated PD models to the developing world especially Pakistan which the existing research and literature is silent about.

Conclusion

Manhunts ◽  
2012 ◽  
Author(s):  
Grégoire Chamayou ◽  
Steven Rendall
Keyword(s):  
Rene Girard ◽  
René Girard ◽  
History Of ◽  
Uniform Model

This concluding chapter summarizes key themes and presents some final thoughts. This book outlines the history of the changing morphology of cynegetic powers, the ones that are exercised by tracking and capturing subjects. Whereas an author like René Girard postulates a kind of invariant of violence in human societies that is for him essentially based on a logic of expiatory sacrifice, this book has instead tried to bring out what was specific, in their motives and functions, to each of the great historical phenomena of manhunting. Contrary to what the theory of the scapegoat claims, the choice of prey, for example, is never arbitrary or “relatively indifferent”: it is governed by targeted strategies that remain unintelligible so long as they are reduced to the uniform model of a sacrificial violence.

Part 1 General and Special Reports, 5 UNCITRAL: UNCITRAL Perspectives on the Hague Principles

2021 ◽  
Author(s):  
Castellani Luca ◽  
Emery Cyril
Keyword(s):  
United Nations ◽  
Party Autonomy ◽  
Freedom Of Contract ◽  
Trade Law ◽  
International Trade Law ◽  
Opt Out ◽  
Uniform Model ◽  
The Hague ◽  
The United Nations ◽  
High Level

This chapter evaluates the relationship between the United Nations Commission on International Trade Law (UNCITRAL) and the Hague Principles. The UNCITRAL texts, starting with the early drafts of the United Nations Convention on Contracts for the International Sale of Goods (CISG), have provided solid ground in support of freedom of contract. In providing a uniform model applicable to multiple jurisdictions, the CISG ensures a high level of safeguard of parties’ wills. In particular, the CISG promotes the well-established principle of party autonomy by virtue of its Article 6, which allows parties to the contract to opt out entirely of its provisions and hence to choose another law more appropriate to their needs. Given UNCITRAL’s desire to further facilitate use of the CISG by traders and in light of its focus on freedom of contract and party autonomy, it is not surprising that the UNCITRAL Secretariat took a particular interest in the development by the Hague Conference on Private International Law of the Principles on Choice of Law in International Commercial Contracts (2015) and the related Commentary. The chapter then looks at UNCITRAL’s endorsement of the Hague Principles.

Sign in / Sign up

Export Citation Format

Share Document