scholarly journals The Analysis of a Model–Task Dyad in Two Settings: Zaplify and Pencil and Paper

Mathematics ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 581
Author(s):  
Canan Güneş
Keyword(s):  
Mathematical Models ◽  
Added Value ◽  
Semiotic Mediation ◽  
Digital Tool ◽  
New Model ◽  
Whole Process ◽  
Pencil And Paper

This paper examines the added value of a digital tool that constitutes a new model to introduce students to multiplication. Drawing on the theory of semiotic mediation, the semiotic potential of this new model is analysed with respect to the same task that can be solved in two different settings (the digital tool and pencil and paper). The analysis shows that the task solutions undergo significant changes depending on to the technological settings. Even though the end product of the model–task dyads might look the same in both settings, the product emerges from the different processes that would mediate quite different meanings for multiplication. This suggests that while designing tasks that involve mathematical models, rather than focusing only on the end product, considering the whole process would reveal the extensive potential meanings the model–task dyad can mediate.

A New Model of Local Elastic Deflections in Grinding

1984 ◽  
Vol 106 (1) ◽  
pp. 154-163 ◽  
Author(s):  
D. P. Saini
Keyword(s):  
Plastic Deformation ◽  
Mild Steel ◽  
Mathematical Models ◽  
Normal Force ◽  
Tangential Force ◽  
Force Component ◽  
Workpiece Material ◽  
Direct Function ◽  
New Model ◽  
Single Grain

Mathematical models describing the deflection behavior of the wheel-work contact presented so far are based on the assumption that contact deflections are a direct function of the normal force on the wheel or the grains during grinding. This paper presents experimental results showing the evidence of a new mechanism of contact deflections due to the rotation of grain as a result of the tangential force component. In this perspective, a new model which considers the deflections due to both the normal and the tangential force is proposed and developed with the assumption of elasto-plastic deformation of the workpiece material around the grain during cutting. The model is shown to be consistent with experimental deflections obtained from single grain cutting on mild steel and EN25 steel specimens.

scholarly journals Biomolecules from Plant Residues

Biomolecules ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1496
Author(s):  
Carmen Ancín-Azpilicueta ◽  
Irene Esparza ◽  
Nerea Jiménez-Moreno
Keyword(s):  
Circular Economy ◽  
Added Value ◽  
Plant Residues ◽  
New Model ◽  
Production And Consumption

The circular economy is a new model of production and consumption that involves reusing, renewing and recycling products to create added value [...]

In silico biology of bone modelling and remodelling: regeneration

2009 ◽  
Vol 367 (1895) ◽  
pp. 2031-2053 ◽  
Author(s):  
L. Geris ◽  
J. Vander Sloten ◽  
H. Van Oosterwyck
Keyword(s):  
Mathematical Models ◽  
Experimental Research ◽  
In Silico ◽  
Healing Process ◽  
Treatment Strategies ◽  
Added Value ◽  
Mechanical Stimuli ◽  
Implant Placement ◽  
Bone Modelling ◽  
In Silico Biology

Bone regeneration is the process whereby bone is able to (scarlessly) repair itself from trauma, such as fractures or implant placement. Despite extensive experimental research, many of the mechanisms involved still remain to be elucidated. Over the last decade, many mathematical models have been established to investigate the regeneration process in silico . The first models considered only the influence of the mechanical environment as a regulator of the healing process. These models were followed by the development of bioregulatory models where mechanics was neglected and regeneration was regulated only by biological stimuli such as growth factors. The most recent mathematical models couple the influences of both biological and mechanical stimuli. Examples are given to illustrate the added value of mathematical regeneration research, specifically in the in silico design of treatment strategies for non-unions. Drawbacks of the current continuum-type models, together with possible solutions in extending the models towards other time and length scales are discussed. Finally, the demands for dedicated and more quantitative experimental research are presented.

scholarly journals Improved Mathematical Model of Polluted Insulators nonlinear behaviour Under AC Voltage Based on Experimental Tests

2018 ◽  
Author(s):  
MousalrezaFaramarzi Palangar ◽  
Mohammad Mirzaie
Keyword(s):  
Thermal Conductivity ◽  
Mathematical Model ◽  
Mathematical Models ◽  
Experimental Tests ◽  
The Other ◽  
Critical Voltage ◽  
Nonlinear Behaviour ◽  
New Model ◽  
The Relationship ◽  
Good Agreement

Abstract—In this paper, an improved mathematical model for flashover behavior of polluted insulators is proposed based on experimental tests. In order to determine the flashover model of polluted insulators, the relationship between conductivity and salinity of solution pollution layer of the insulator is measured. Then, the leakage of current amplitude of four common insulators versus axial, thermal conductivity and arc constants temperature was determined. The experimental tests show that top leakage distance (TLd) to bottom leakage distance (BLd) ratio of insulators has a significant effect on critical voltage and current. Therefore, critical voltage and current were modeled by TLd to BLd ratio Index (M). Also, salinity of solution pollution layer of the insulators has been applied to this model by resistance pollution parameter. On the other hand, arc constants of each insulator in new model have been identified based on experimental results. Finally, a mathematical model is intended for critical voltage against salinity of solution pollution layer of different insulators. This model depends on insulator profile. There is a good agreement between the experimental tests of pollution insulators obtained in the laboratory and values calculated from the mathematical models developed in the present study.

scholarly journals Improved Mathematical Model of Polluted Insulators nonlinear behaviour Under AC Voltage Based on Experimental Tests

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
MousalrezaFaramarzi Palangar ◽  
Mohammad Mirzaie
Keyword(s):  
Thermal Conductivity ◽  
Mathematical Model ◽  
Mathematical Models ◽  
Experimental Tests ◽  
The Other ◽  
Critical Voltage ◽  
Nonlinear Behaviour ◽  
New Model ◽  
The Relationship ◽  
Good Agreement

In this paper, an improved mathematical model for flashover behavior of polluted insulators is proposed based on experimental tests. In order to determine the flashover model of polluted insulators, the relationship between conductivity and salinity of solution pollution layer of the insulator is measured. Then, the leakage of current amplitude of four common insulators versus axial, thermal conductivity and arc constants temperature was determined. The experimental tests show that top leakage distance (TLd) to bottom leakage distance (BLd) ratio of insulators has a significant effect on critical voltage and current. Therefore, critical voltage and current were modeled by TLd to BLd ratio Index (M). Also, salinity of solution pollution layer of the insulators has been applied to this model by resistance pollution parameter. On the other hand, arc constants of each insulator in new model have been identified based on experimental results. Finally, a mathematical model is intended for critical voltage against salinity of solution pollution layer of different insulators. This model depends on insulator profile. There is a good agreement between the experimental tests of pollution insulators obtained in the laboratory and values calculated from the mathematical models developed in the present study.

scholarly journals Israeli start-ups – especially in cyber security: Can a new model enhance their survival rate?

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Avner Barnea
Keyword(s):  
Cyber Security ◽  
Significant Contribution ◽  
External Environment ◽  
Added Value ◽  
Analytical Models ◽  
New Model ◽  
Start Up ◽  
Review Model ◽  
Start Ups ◽  
Israeli Economy

Start-up companies are the fastest growing business in Israel. However, half of them do not last through their fourth year. This paper looks into the issue of the power of Israeli start-ups to survive and to become successful companies. The challenge is to seek new directions, which will help this sector to change this disappointing course. The start-up sector has a significant contribution to the strength of the Israeli economy which leans on its intellectual resources. Based on my continuing consulting in implementing competitive intelligence to local Israeli start-ups and further research that I have done by following closely the added value of developing capabilities, which enable better understanding of the external environment, I have found that one of the main causes of the high percentage of failures of Israeli start-ups is the difficulties in comprehending the competitive landscape, which has a significant contribution to making them less competitive. By using a new model, the competitive review model, which considers the special attributes of start-ups, especially in cyber security, this kind of small company can be better prepared for intense competition. This is in addition to the Lean start-up model, which is not executed in this segment in Israel and faces serious resistance based mainly on opposition to unfamiliar input. Based on combining the new competitive review model with existing analytical models, a few local start-ups' executives have already matured by awareness about the value of sensing the external environment, which have the potential to change the course of at least some of the Israeli start-ups and increase the success rate for this sector. 

The Wasta Model

2022 ◽  
pp. 422-447
Author(s):  
Elizabeth Kassab Sfeir
Keyword(s):  
Mixed Methods ◽  
Human Resources ◽  
Employee Engagement ◽  
Training And Development ◽  
Third Party ◽  
Added Value ◽  
Future Research ◽  
New Model ◽  
Hr Practices ◽  
The Impact

This article explores the concept of Wasta, an interpersonal influence. It is defined by Mohamed and Mohamed as involvement of a third-party person to attain a favour. This research examines the impact that Wasta has on human resources practices in Lebanon. A mixed methods approach, being questionnaires and interviews, was used in order to obtain data. Implications of Wasta in a new model are illustrated showing the effect on employees when recruited through knowing someone. It subsequently shows the influences on other HR practices of training and development, compensation, and career development. This paper is the first of its kind illustrating the impact of Wasta on employee engagement. It is a pillar for future research, giving added value to the minimal studies available on HR practices in Lebanon and the Middle East.

MATHEMATIC MODELS OF WATER RESOURCES MANAGEMENT FOR IRRIGATION SYSTEMS

2020 ◽  
Vol 5 (3) ◽  
pp. 64-70
Author(s):  
Aysulu Aydarova ◽  
Keyword(s):  
Water Resources ◽  
Mathematical Models ◽  
Water Resources Management ◽  
Optimal Distribution ◽  
Irrigation Systems ◽  
New Model ◽  
Resources Management

This article explores the models of water resources management in irrigation systems. The article provides a classification of mathematical models for the optimal distribution of water resources. The work also substantiates the need to develop a new model of water resources management for distributed irrigation systems.

scholarly journals Blockchain-Based Ubiquitous Transport and Logistics Monitoring System

Proceedings ◽  
2019 ◽  
Vol 31 (1) ◽  
pp. 9
Author(s):  
Alexandra Rivero-García ◽  
Iván Santos-González ◽  
Cándido Caballero-Gil ◽  
Jezabel Molina-Gil ◽  
Candelaria Hernández-Goya ◽  
...  
Keyword(s):  
Global Positioning System ◽  
Radio Frequency Identification ◽  
Communication Technologies ◽  
Added Value ◽  
Whole Process ◽  
Global Positioning ◽  
Frequency Identification ◽  
Communications System ◽  
Ubiquitous Communications

Logistics and transport have become an increasingly important topic in recent years. In this kind of scenario, being able to offer added value to users means an important improvement in the services offered by the different companies. Different actors take part in the process of sending, transportation and collection of the different products through roads, ports and airports. During this process different aspects of security must be taken into account, since an error in one of them can cause major problems for public health, nature or even the economy of a country. With all this in mind, this work proposes a new system that allows us, through the use of wireless technologies such as Radio Frequency Identification, Global Positioning System, Wi-Fi Direct and mobile communication technologies, to automate the process of authentication and tracking of different products and goods. The proposed scheme allows through the use of the cloud the creation of a ubiquitous communications system for monitoring, control and even automation of repositioning orders automatically. In addition, the use of a system based on blockchain allows to carry out the whole process in an optimal way that guarantees the privacy and immutability of the data referring to the transports and merchandise. This work allows to reduce costs and improve the quality of the processes of sending, transport and reception of products for the different companies involved in the supply chain.

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