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Abstract

Details

An Introduction to Algorithmic Finance, Algorithmic Trading and Blockchain
Type: Book
ISBN: 978-1-78973-894-0

Open Access
Article
Publication date: 31 December 2021

Rishabh Ranjan, P.N. Pandey and Ajit Paul

In this paper, the authors prove that the Douglas space of second kind with a generalised form of special (α, β)-metric F, is conformally invariant.

Abstract

Purpose

In this paper, the authors prove that the Douglas space of second kind with a generalised form of special (α, β)-metric F, is conformally invariant.

Design/methodology/approach

For, the authors have used the notion of conformal transformation and Douglas space.

Findings

The authors found some results to show that the Douglas space of second kind with certain (α, β)-metrics such as Randers metric, first approximate Matsumoto metric along with some special (α, β)-metrics, is invariant under a conformal change.

Originality/value

The authors introduced Douglas space of second kind and established conditions under which it can be transformed to a Douglas space of second kind.

Details

Arab Journal of Mathematical Sciences, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1319-5166

Keywords

Book part
Publication date: 30 March 2022

Tatyana Y. Druzhilovskaya, Emilia S. Druzhilovskaya, Tatyana V. Stozharova, Evgeniya V. Vilkova and Irina P. Denisova

The purpose of this article is to identify problems and opportunities for improving the formation of financial statements (FS) in accordance with International Standards…

Abstract

Purpose

The purpose of this article is to identify problems and opportunities for improving the formation of financial statements (FS) in accordance with International Standards, which is the most important instrument for international economic integration.

Design/Methodology/Approach

In carrying out the research, we used the FS of the modern organizations, prepared in accordance with International Standards (IASs and IFRSs), posted on the official websites of these organizations. At the same time, we researched the FS of both Russian and foreign organizations in order to draw conclusions about the problems of preparing FS in accordance with International Standards, which are typical for most modern organizations in different countries. When conducting research, we used methods such as comparison, analysis and synthesis.

Findings/Results

We identified the main problems that arise in practice when preparing FS in accordance with International Standards, which are typical for both Russian and foreign organizations. We also analysed the project of the IASB (the organization that develops these standards) to improve the requirements for the preparation of FS in accordance with International Standards. Based on the analysis carried out, we identified the main problems arising from the planned requirements of this project. As a result of the research carried out, we made proposals for solving the identified problems of the formation of FS in accordance with International Standards.

Conclusions/Recommendations/Value

Our proposals can be used to improve the regulations of International Standards for the formation of FS, and can also be applied in the practical work of modern organizations.

Details

Current Problems of the World Economy and International Trade
Type: Book
ISBN: 978-1-80262-090-0

Keywords

Open Access
Book part
Publication date: 4 May 2018

Rahmi Agustina, M. Ali S, Ferdinan Yulianda and Suhendrayatna

Purpose – The purpose of this research is to investigate the relationship of lead (Pb) and zinc (Zn) contents in sediment of Faunus ater (F. ater) population density and…

Abstract

Purpose – The purpose of this research is to investigate the relationship of lead (Pb) and zinc (Zn) contents in sediment of Faunus ater (F. ater) population density and to analyze the relationship between Pb and Zn accumulation in F. ater with F. ater density in Reuleng River, Leupung, Aceh Besar.

Design/Methodology/Approach – Sampling was conducted in November 2016 until January 2017. Density of F. ater was analyzed by density formula while its relationship to Pb and Zn in sediments and F. ater was conducted by correlation analysis method.

Findings – The results showed that correlation between Pb and Zn in sediments and in F. ater varies at each locations on every month of sampling. Pb and Zn content in sediments found a fluctuating relationship in each month of sampling with density of F. ater. Correlation of Pb content in sediments with F. ater density showed a medium correlation in January 2017 with r-value = 0.665. Zn in sediment has a very strong correlation to F. ater density in November 2016 with r-value = 0.891. Pb in F. ater has a medium correlation to F. ater density in January 2017 with r-value = 0.436. Furthermore, accumulation of Zn in F. ater to its density does show some apparent correlation in each month of sampling.

Research Limitation/Implications – This research gives information about the relationship of Pb and Zn contents in sediment to density of F. ater and to analyze correlation of Pb and Zn in F. ater to density of F. ater in Reuleng River, Leupung, Aceh Besar district.

Originality/Value – This is the first time research is conducted about on the correlation between lead and zinc to obtain the density of F. ater.

Details

Proceedings of MICoMS 2017
Type: Book
ISBN:

Keywords

Book part
Publication date: 27 February 2009

Donald Lien

This chapter adopts value at risk (VaR) to analyze the hedge timing issue. Suppose that a producer, at a give time, recognizes the possible need of a futures contract for…

Abstract

This chapter adopts value at risk (VaR) to analyze the hedge timing issue. Suppose that a producer, at a give time, recognizes the possible need of a futures contract for risk reduction purpose. Should the producer trade in the futures market immediately or should he wait? Conditions are characterized under which delaying the hedge decision is preferred as it produces a smaller VaR. For an efficient futures market, it appears that the producer is better off delaying the hedge decision as long as possible. However, strong backwardation promotes early hedging.

Details

Research in Finance
Type: Book
ISBN: 978-1-84855-447-4

Article
Publication date: 11 May 2022

Kristine M. Fleming, Kenya N. Washington Johnson and Maria U. Okeke

The purpose of this study is to share the experience of delivering a culturally responsive teaching program, the R.E.F.O.R.M. Café, at a historically Black college and…

Abstract

Purpose

The purpose of this study is to share the experience of delivering a culturally responsive teaching program, the R.E.F.O.R.M. Café, at a historically Black college and university. The R.E.F.O.R.M. Café provided an opportunity for undergraduate students to participate in dialogue that reinforces the need for social justice in preserving Black lives. Before participating in the R.E.F.O.R.M. Café, lectures using a critical perspective to connect health to the history of the modern-day civil rights movement were conducted.

Design/methodology/approach

Using the World Café as a model, a qualitative methodology was used to implement the R.E.F.O.R.M. Café as part of community health education course curriculum to address health disparities plaguing Black communities. The breakout room function in Zoom was used to substitute for the tables used in traditional World Cafés because of COVID-19 restrictions, which allowed for small, focus-group-like dialogues to occur.

Findings

The R.E.F.O.R.M. Café challenged students to consider the power and opportunity for individuals on the front line to contest racial disparities. Students indicated the R.E.F.O.R.M. Café reinforced the importance of meaningful conversations, the connection to confronting health disparities and the effectiveness of program design and implementation to engage in dialogue around issues of race and equity. Students indicated the importance of hearing the perspective of peers when considering their personal identities as change agents.

Originality/value

This paper contributes to the literature that extends the body of knowledge related to implementing culturally responsive teaching programs at a historically Black college and university. Studies currently available related to implementing culturally responsive teaching programs among undergraduate students do not focus specifically on Black, Indigenous, and People of Color.

Details

Journal for Multicultural Education, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2053-535X

Keywords

Article
Publication date: 9 May 2022

Xinhui Cheng, Weifeng Zhao, Zhichao Zhang and Qing Zhang

Corporate social responsibility (CSR) has now been paid notable attention by a large number of firms. The aim of this paper is to investigate a better way to implement CSR…

Abstract

Purpose

Corporate social responsibility (CSR) has now been paid notable attention by a large number of firms. The aim of this paper is to investigate a better way to implement CSR in a socially responsible supply chain with different channel leaderships.

Design/methodology/approach

Started from measuring CSR by purely taking consumer surplus into account, a stylized centralized channel and two different decentralized channels are first developed and examined for equilibria in the socially responsible chain. Furthermore, this paper extends to a socially irresponsible supply chain and a broader practice of CSR by simultaneously incorporating environmental externality and consumer surplus into CSR.

Findings

With the analytical studies, several interesting and important results and managerial insights are clearly revealed. For example, but not limited to, it is found that: (1) Compared with the leader, the follower can effectively implement CSR for a better performance in both pure and socially responsible profits in the decentralized channel; (2) undertaking socially responsible concerns does not always mean reducing the economic profit and conversely being socially irresponsible does not always induce an increase in economic profit for the socially responsible member(s); (3) CSR concern level plays a key role in both the pure and socially responsible profit. An increase in CSR concern level clearly increases the socially responsible profit and poses an ambiguous impact on pure profit depending on different channel leaderships: it decreases the centralized channel in pure profit but increases the pure profit with the decentralized channel under certain conditions; and (4) interestingly, the authors find that decentralization can outperform centralization regarding on both pure and socially responsible channel profits by properly implementing CSR concern levels.

Practical implications

The results derived in this paper provide novel managerial implications to the socially responsible members in terms of pricing decisions, order quantity and CSR practice. In addition, this paper assists the socially responsible supply chain in determining the optimal channel leadership to undertake CSR. That is, decentralization may achieve a better performance than integration under certain market conditions.

Originality/value

To the best of the authors' knowledge, this paper is the first attempt to explore the interactive of the CSR practice and channel leadership in a socially responsible supply chain.

Details

Kybernetes, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0368-492X

Keywords

Article
Publication date: 19 May 2022

Sanghoon Lee, Yosheph Yang and Jae Gang Kim

The Fay and Riddell (F–R) formula is an empirical equation for estimating the stagnation-point heat flux on noncatalytic and fully catalytic surfaces, based on an…

Abstract

Purpose

The Fay and Riddell (F–R) formula is an empirical equation for estimating the stagnation-point heat flux on noncatalytic and fully catalytic surfaces, based on an assumption of equilibrium. Because of its simplicity, the F–R has been used extensively for reentry flight design as well as ground test facility applications. This study aims to investigate the uncertainties of the F-R formula by considering velocity gradient, chemical species at the boundary layer edge, and the thermochemical nonequilibrium (NEQ) behind the shock layer under various hypersonic NEQ flow environments.

Design/methodology/approach

The stagnation-point heat flux calculated with the F–R formula was evaluated by comparison with thermochemical NEQ calculations and existing flight experimental values.

Findings

The comparisons showed that the F–R underestimated the noncatalytic heat flux, because of the chemical composition at the surface. However, for fully catalytic heat flux, the F–R results were similar to values of surface heat flux from thermochemical NEQ calculations, because the F–R formula overestimates the diffusive heat flux. When compared with the surface heat flux results obtained from flight experimental data, the F–R overestimated the fully catalytic heat flux. The error was 50% at most.

Originality/value

The results provided guidelines for the F–R calculations under hypersonic flight conditions and for determining the approximate error range for noncatalytic and fully catalytic surfaces.

Details

International Journal of Numerical Methods for Heat & Fluid Flow, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0961-5539

Keywords

Article
Publication date: 17 May 2022

Osman Nuri Şahin and Mehmet İsmet Can Dede

Mobile robots may perform very critical tasks under difficult operating conditions. Faults encountered during their tasks may cause the task to be interrupted or failed…

Abstract

Purpose

Mobile robots may perform very critical tasks under difficult operating conditions. Faults encountered during their tasks may cause the task to be interrupted or failed completely. In the active fault tolerant control methods, it is very important not only to detect the faults that occur in the robot, but also to isolate these faults to develop a fault recovery strategy that is suitable for that specific type of fault. This study aims to develop a model-based fault detection and isolation method for wheel slippage and motor performance degradation that may occur in wheeled mobile robots.

Design/methodology/approach

In the proposed method, wheel speeds can be estimated via the dynamic model of the mobile robot, which includes a friction model between the wheel and the ground. Four residual signals are obtained from the differences between the estimated states and the measured states of the mobile robot. Mobile robot’s faults are detected by using these signals. Also, two different residual signals are generated from the calculation of the traction forces with two different procedures. These six residual signals are then used to isolate possible wheel slippage and performance degradation in a motor.

Findings

The proposed method for diagnosing wheel slip and performance degradation in motors are tested by moving the robot in various directions. According to the data obtained from the test results, a logic table is created to isolate these two faults from each other. Thanks to the created logic table, slippage in any wheel and performance degradation in any motor can be detected and isolated.

Originality/value

Two different recovery strategies are needed to recover temporary wheel slippage and permanent motor faults. Therefore, it is important to isolate these two faults that create similar symptoms in robot’s general movement. Thanks to the method proposed in this study, it is not only possible to isolate the slipping wheel with respect to the non-slipping wheels or to isolate the faulty motor from the non-faulty ones, but also to isolate these two different fault types from each other.

Details

Industrial Robot: the international journal of robotics research and application, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0143-991X

Keywords

Open Access
Article
Publication date: 19 May 2022

Jianfeng Zhao, Niraj Thurairajah, David Greenwood, Henry Liu and Jingfeng Yuan

The unprecedented SARS-CoV-2 (COVID-19) pandemic has further constrained the budgets of governments worldwide for delivering their much-needed infrastructure…

Abstract

Purpose

The unprecedented SARS-CoV-2 (COVID-19) pandemic has further constrained the budgets of governments worldwide for delivering their much-needed infrastructure. Consequently, public-private partnerships (PPPs), with the private sector's investment and ingenuity, would appear to be an increasingly popular alternative. Value for money (VfM) has become the major criterion for evaluating PPPs against the traditional public sector procurement and, however, is plagued with controversy. Hence, it is important that governments compare and contrast their practice with similar and disparate bodies to engender best practice. This paper, therefore, aims to understand governments' assessment context and provide a cross-continental comparison of their VfM assessment.

Design/methodology/approach

Faced with different domestic contexts (e.g. aging infrastructure, population growth, and competing demands on finance), governments tend to place different emphases when undertaking the VfM assessment. In line with the theory of boundary spanning, a cross-continental comparison is conducted between three of the most noticeable PPP markets (i.e. the United Kingdom, Australia and China) about their VfM assessment. The institutional level is interpreted by a social, economic and political framework, and the methodological level is elucidated through a qualitative and quantitative VfM assessment.

Findings

There are individual institutional characteristics that have shaped the way each country assesses VfM. For the methodological level, we identify that: (1) these global markets use a public sector comparator as the benchmark in VfM assessment; (2) ambiguous qualitative assessment is conducted only against PPPs to strengthen their policy development; (3) Australia's priority is in service provision whereas that of the UK and China is project finance and production; and (4) all markets are seeking an amelioration of existing controversial VfM assessments so that purported VfM relates to project lifecycles. As such, an option framework is proposed to make headway towards a sensible selection of infrastructure procurement approaches in the post COVID-19 era.

Originality/value

This study addresses a current void of enhancing the decision-making process for using PPPs within today's changing environment and then opens up an avenue for future empirical research to examine the option framework and ensuing VfM decisions. Practically, it presents a holistic VfM landscape for public sector procurers that aim to engage with PPPs for their infrastructure interventions.

Details

Engineering, Construction and Architectural Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0969-9988

Keywords

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