scholarly journals SOFTWARE FOR THE DESIGN OF GEARING WITH AN ASYMMETRIC PROFILE

2021 ◽  
Vol 17 (2) ◽  
Author(s):  
Ondřej Miláček
Keyword(s):  
Point Of View ◽  
Loading Conditions ◽  
Paper Briefly ◽  
Gear Mesh ◽  
Special Approach

This article is a continuation of previously published articles. This paper briefly describes the positive and negative qualities of asymmetric gearing from the point of view of loading conditions applied at the gearset, and the development and latest update of the software for designing this special involute gearing. The precise profile of the manufacturing tool is also described. All display options, and the option of gear mesh animation using this program, is shown. All equations necessary for the gearing geometry description, and a special approach with respect to x-shift coefficients distribution, are also mentioned in this paper.

Dynamic Analysis of a Multi-Mesh Helical Gear Train

1992 ◽  
Author(s):  
Ahmet Kahraman
Keyword(s):  
Loading Condition ◽  
Helix Angle ◽  
Transmission Error ◽  
Helical Gear ◽  
Forced Response ◽  
Gear Train ◽  
Loading Conditions ◽  
Gear Mesh ◽  
Natural Modes ◽  
Static Transmission Error

Abstract In this paper, the dynamic behavior of a multi-mesh helical gear train is studied. The gear train consists of three helical gears, with one of the gears in mesh with the other two. An 18-degree-of-freedom dynamic model which includes transverse, torsional, axial and rotational (rocking) motions of the flexibly mounted gears is developed. Two different loading conditions are identified. For case I, the system is driven by the gear in the middle, and for case II, the system is driven by one of the gears at either end of the gear train. Gear mesh phases under each loading condition are determined. The natural modes are predicted, and effects of the helix angle and the loading condition on the natural modes are explained. The forced response, which includes dynamic mesh and bearing forces, due to the static transmission error excitation is found. Effects of loading conditions and asymmetric positioning on the response are also explored. The results suggest that the dynamic forces are lower if the number of teeth of the gear in the middle is (i) an odd number for case I type loading, and (ii) an even number for case II type loading.

scholarly journals Relating is an Operant: A Fly Over of 35 Years of RFT Research

2021 ◽  
Author(s):  
Steven C. Hayes ◽  
Stu Law ◽  
Kian Assemi ◽  
Neal Falletta-Cowden ◽  
Melia Shamblin ◽  
...  
Keyword(s):  
Relational Frame Theory ◽  
Comprehensive Evaluation ◽  
Relational Learning ◽  
Point Of View ◽  
Frame Theory ◽  
Paper Briefly ◽  
Future Directions ◽  
Relational Responding ◽  
Relational Frame ◽  
Type Of Behavior

Relational Frame Theory (RFT) is the simplest form of operant theory since it claims nothing more than a particular type of behavior, arbitrarily applicable derived relational responding, is an operant. While the theory is simple, its implications are not, and adoption has been slow until recently. RFT was first formally described in 1985 and in the 35 years since, hundreds of studies have been conducted on relational learning from an operant point of view. The present paper briefly summarizes that history and examines some of its key claims. So far, the empirical program delineated by RFT has held up remarkably well. Future directions are delineated that will enable a more comprehensive evaluation of the importance of the RFT research program, and a more thorough exploration of its profound implications.

Nonlinear Kinematic Analysis of the Deformation of Plates for Ship Hull Fabrication

2000 ◽  
Vol 44 (04) ◽  
pp. 270-277 ◽  
Author(s):  
Jong Gye Shin ◽  
Cheol Ho Ryu
Keyword(s):  
Kinematic Analysis ◽  
Point Of View ◽  
Initial Configuration ◽  
Plate Bending ◽  
Loading Conditions ◽  
Flat Plates ◽  
Line Heating ◽  
Double Curvature ◽  
Surface Data ◽  
Final Deformation

Curved plates in a ship's hull are fabricated by mechanical or thermal processes, such as roller bending and line heating methods. The formation of curved plates is a process in which, from the point of view of mechanics, permanent bending and/or in-plane strains are applied to flat plates. Only bending strains are applied to single curvature shells, while in-plane strains, in addition to bending strains, need to be applied in order to form double curvature shells. In-plane strains, however, are known to be small and, thus, can be neglected. The mechanics of plate bending is different from the production of plate bending. In the mechanics of plate bending, an initial configuration of a plate is given, along with boundary and loading conditions. The deformed shape can then be calculated. In the production of plate bending, however, only the final deformation shape is given and the initial configuration is unknown. Loading conditions must also be determined. This paper presents rigorous formulations of a kinematic problem for the production of plate bending. Nonlinear kinematic analysis with and without initial imperfections is employed in order to include in-plane strains. An algorithm is suggested to determine an initial configuration from given surface data. Numerical examples show that the in-plane strain must not be negligible and, rather, plays an important role in the determination of heating paths in the line heating method.

Biometrics

2011 ◽  
Vol 2 (1) ◽  
pp. 19-34
Author(s):  
Halim Sayoud
Keyword(s):  
New Technologies ◽  
Research Field ◽  
Point Of View ◽  
Human Beings ◽  
Behavioral Characteristic ◽  
Paper Briefly ◽  
Economic Point ◽  
Security Applications ◽  
Automated Methods ◽  
Living Person

The term biometrics is derived from the Greek words: bio (life) and metrics (to measure). “Biometric technologies” are defined as automated methods of verifying or recognizing the identity of a living person based on a physiological or behavioral characteristic. Several techniques and features were used over time to recognize human beings several years before the birth of Christ. Today, this research field has become very employed in many applications such as security applications, multimedia applications and banking applications. Also, many methods have been developed to strengthen the biometric accuracy and reduce the imposture errors by using several features such as face, speech, iris, finger vein, etc. From a security purpose and economic point of view, biometrics has brought a great benefit and has become an important tool for governments and institutions. However, citizens are expressing their thorough worry, which is due to the freedom limitations and loss of privacy. This paper briefly presents some new technologies that have recently been proposed in biometrics with their levels of reliability, and discusses the different social and ethic problems that may result from the abusive use of these technologies.

The changing role of the salesperson: how should salespeople act today?

2019 ◽  
Vol 33 (6) ◽  
pp. 8-11
Author(s):  
Sandra Castro-González ◽  
Belén Bande
Keyword(s):  
Sales Force ◽  
Point Of View ◽  
Paper Briefly ◽  
Content Type ◽  
Business Context ◽  
Organizational Role ◽  
Key Points ◽  
Changing Role ◽  
Practical Implications

Purpose The purpose of this paper is to highlight the nature and the organizational role of salespeople and, in particular, underscore the change in salespeople’s management in the current business context. Design/methodology/approach The paper briefly explains the role of salespeople in an organization and how salespeople are gaining prominence in customer management. From this point of view, the paper suggests steps to achieve the sale. Findings It is evident that salespeople must change the way they achieve sales goals within the organization. Currently, they need to adopt a more customer-centric approach, and the paper suggests how to do this. Practical implications The paper aims to provide key points for understanding and managing the sales force within the organization. Findings are relevant for those who must manage these workers or those who simply want to know more about the characteristics of the sales force. Originality/value The paper highlights the importance of salespeople in organizations and describes how they should be managed. In addition, in some ways, the paper helps improve readers’ perception of the sales position.

An analytical review of Ahmadinejad’s foreign policy frameworks in terms of constructivism theory

2019 ◽  
Vol 5 (3) ◽  
pp. 209-222
Author(s):  
Ali AbolAli Aghdaci
Keyword(s):  
Foreign Policy ◽  
International System ◽  
International Community ◽  
Point Of View ◽  
Main Question ◽  
Islamic Republic ◽  
Analytical Review ◽  
Islamic Republic Of Iran ◽  
Special Approach ◽  
International Systems

The foreign policy of the Islamic Republic of Iran in the administration of Mahmoud Ahmadinejad, due to its importance and its not so in significant achievements, from the structuralist point of view, created a different identity and role in international relations and a special approach in relation to foreign and international systems. The author’s main question is that what impact has the foreign policy of Mahmoud Ahmadinejad had in the international community? It seems that the role of domestic norms that came from the international community was damaged by internal policies due to Mahmoud Ahmadinejad’s policies, which, from the structuralist point of view, had a profound effect on the declining of Iranian foreign policy during the Ahmadinejad era in the international system. Direct conflict with the global system, presenting incorrect policies of foreign policy of the Islamic Republic, the lack accepting common understanding minds of the international community, non-convergence in foreign policy, the adoption of irrational foreign policy, are all important factors that could undermine the foreign policy of the Islamic Republic of Iran in the public opinion of the international community.

The future of sociology of FLOSS

First Monday ◽  
2005 ◽  
Author(s):  
Yuwei Lin
Keyword(s):  
Open Source ◽  
Open Source Software ◽  
Social World ◽  
Point Of View ◽  
Sociological Perspective ◽  
Special Issue ◽  
Paper Briefly ◽  
Research Topics ◽  
Future Studies ◽  
Cooperative Community

The following commentary is part of First Monday's Special Issue #2: Open Source. This paper briefly summarises the current research on the free/libre open source software (FLOSS) communities and discusses the deficiency of a body of FLOSS research done from the sociological perspective. Since Eric Raymond's famous 'Cathedral and Bazaar' that depicts a harmoniously cooperative community/bazaar that engages 'hackers' to develop and advocate FLOSS, many other successors have adopted a similar utopian-like perspective to understand the FLOSS development and organisation processes within and across communities. However, I argue that such a view, partially valid in explaining the FLOSS development, not only ignores the diversity of population and their different articulations, interpretation on and performances towards developing FLOSS, but also neglects the different environments and contexts where FLOSS is deployed, developed and implemented. A sociological point of view is vital in that it helps understand the dynamics emerging from the heterogeneity of the FLOSS social world and allows us to see different roles played by diverse actors and various environments and contexts where FLOSS evolves differently. This paper concludes with a list of suggested research topics for future studies.

An Analysis of the Influence of Visual Perception Characteristics to the Usability Design of Infants Aapplication Interface

2013 ◽  
Vol 655-657 ◽  
pp. 2093-2098
Author(s):  
Juan Li ◽  
Yan Chen
Keyword(s):  
Visual Perception ◽  
Detailed Analysis ◽  
Full Text ◽  
Point Of View ◽  
Paper Briefly ◽  
Interface Usability

At present, most of infant application products just rest on the level of beautiful interface while the usability of application interface is less noticed. The infant here and mentioned in the full text particularly refer to infant of 15-36 months old. From the point of view of visual perception characteristics, the paper mainly carries out an analysis of the usability design of application interface of infants. For the start, the paper briefly states the connection between the usability of infants’ application interface and the visual perception characteristics, then gives a detailed analysis of the influence of the visual perception characteristics in the usability design of infants’ interface, and preliminarily sums up the direction of infants’ application interface usability design.

scholarly journals Climate as a Concern or a Heritage? Addressing the legal structural roots of climate emergency

2020 ◽  
Vol 21 (1) ◽  
pp. 100-134
Author(s):  
Paulo Magalhães
Keyword(s):  
Common Good ◽  
Natural World ◽  
Social Consequences ◽  
Point Of View ◽  
Earth System ◽  
Governance System ◽  
Paper Briefly ◽  
Common Concern ◽  
Structural Roots ◽  
The Common

When, in the 1980s, climate change entered into the UN agenda, the first question raised was: "What is the climate from a legal point of view?" After the Maltese proposal of 1988 to recognize “Climate as Common Heritage of Humankind”, the adopted UN resolution considered climate as “common concern of humanity”. The concern approach has transformed the positive approach of the Maltese initiative on “the heritage” into a negative approach of a damage containment and sharing system with an undefined obligation to cooperate. This fact makes it technically impossible to build an economy capable of producing positive impacts to recover a well-functioning of the Earth System, and consequently a stable climate. The fact is it fails to build an economic and governance system around the maintenance in a favorable condition of a common good that although intangible exists in natural world and is the very support of life. This paper briefly explores the legal origin of the climate negotiating deadlock resulting from the common concern approach, and the economic and social consequences of the legal non-existence of climate, i.e. a well-functioning Earth System, and points out to the concept of heritage as a way to overcome the obstacles that have prevented collective action.

Health services: governing body vs care receiver – a comparison between China and Hong Kong

2016 ◽  
Vol 21 (2) ◽  
pp. 59-65 ◽  
Author(s):  
Ita M. Fung ◽  
Wai Yee Chan ◽  
Eric Chan
Keyword(s):  
Hong Kong ◽  
Health Policy ◽  
Health Services ◽  
Delivery System ◽  
Design Methodology ◽  
Point Of View ◽  
Paper Briefly ◽  
Content Type ◽  
Governing Body ◽  
Delivery Of Health Services

Purpose – The purpose of this paper is to bring consideration to the care receivers’ point of view when setting policies for the delivery of health services. Design/methodology/approach – This paper briefly reviews the delivery of health services designed by the governing body in Hong Kong and China. It also looks into how the care receivers behave in the respective delivery system. Findings – With different objectives and fundamentals, Hong Kong and China strive to improve the delivery of health services. However, there are issues which make the implementation of these improvements challenging. This paper looks into the care receiver’s concerns that impact the delivery of health services. Originality/value – Provide areas for consideration when setting up health policy.

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