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Open Access
Article
Publication date: 22 October 2021

Syed Farid Uddin, Ayan Alam Khan, Mohd Wajid, Mahima Singh and Faisal Alam

The purpose of this paper is to show a comparative study of different direction-of-arrival (DOA) estimation techniques, namely, multiple signal classification (MUSIC) algorithm…

1355

Abstract

Purpose

The purpose of this paper is to show a comparative study of different direction-of-arrival (DOA) estimation techniques, namely, multiple signal classification (MUSIC) algorithm, delay-and-sum (DAS) beamforming, support vector regression (SVR), multivariate linear regression (MLR) and multivariate curvilinear regression (MCR).

Design/methodology/approach

The relative delay between the microphone signals is the key attribute for the implementation of any of these techniques. The machine-learning models SVR, MLR and MCR have been trained using correlation coefficient as the feature set. However, MUSIC uses noise subspace of the covariance-matrix of the signals recorded with the microphone, whereas DAS uses the constructive and destructive interference of the microphone signals.

Findings

Variations in root mean square angular error (RMSAE) values are plotted using different DOA estimation techniques at different signal-to-noise-ratio (SNR) values as 10, 14, 18, 22 and 26dB. The RMSAE curve for DAS seems to be smooth as compared to PR1, PR2 and RR but it shows a relatively higher RMSAE at higher SNR. As compared to (DAS, PR1, PR2 and RR), SVR has the lowest RMSAE such that the graph is more suppressed towards the bottom.

Originality/value

DAS has a smooth curve but has higher RMSAE at higher SNR values. All the techniques show a higher RMSAE at the end-fire, i.e. angles near 90°, but comparatively, MUSIC has the lowest RMSAE near the end-fire, supporting the claim that MUSIC outperforms all other algorithms considered.

Article
Publication date: 1 February 2000

Muin‐ud‐Din Ahmad Khan

Politics has three contingent aspects, viz. a role‐play, a Majestic Art and a human social science. We may talk of the first aspect as just politicking. The second aspect was…

Abstract

Politics has three contingent aspects, viz. a role‐play, a Majestic Art and a human social science. We may talk of the first aspect as just politicking. The second aspect was delineated by Aristotle as an art of doing vis‐a‐vis the art of making: He meant by the former a behavioural art and by the latter a productive art; and the third aspect represents a comprehensive analytical study of human social behaviour.

Details

Humanomics, vol. 16 no. 2
Type: Research Article
ISSN: 0828-8666

Article
Publication date: 16 February 2022

Safa Jallali and Faten Zoghlami

Relying on the agency theory and the financial intermediation theory, the purpose of this paper is to examine to what extent risk governance would improve corporate governance and…

1502

Abstract

Purpose

Relying on the agency theory and the financial intermediation theory, the purpose of this paper is to examine to what extent risk governance would improve corporate governance and risk management effectiveness. The paper especially investigates the mediating role that would have the risk governance mechanisms in explaining both of the following relationships: the corporate governance–the banks’ performance, and the risk management–the banks’ performance.

Design/methodology/approach

This research uses the Baron and Kenny’s (1986) approach to investigate the mediating effect of risk governance; besides, the study refers to structural equation modeling in carrying out the appropriate panel regressions. The data collection was based largely on Bank scope Database, but some missing qualitative data were gathered manually from the banks’ annual reports available on the banks’ websites.

Findings

The study findings illustrate the significant role of risk governance mechanisms in improving both corporate governance and risk management’s effectiveness. Especially, this paper finds that risk governance is fully explaining the corporate governance–bank performance relationship, but risk governance would explain partially the risk management–bank performance relationship. Further, findings suggest that the internal corporate governance mechanisms seem to be more relevant than the external ones in improving the sample bank performance, and that risk management mechanisms seem to impede rather the sample bank performance.

Practical implications

The findings would make an important contribution to the current debate on the need to reinvent the optimal organization of the bank’s board and directorates and would allow readers to develop more cost-effective governance and risk-management thinking. Besides, the findings may help bank deciders and boards to rationalize costs and to focus only on the relevant corporate governance and risk management mechanisms. Finally, findings might illustrate to regulatory instance the importance of recommending risk governance in their coming corporate governance guidance.

Social implications

The global credit crisis of 2008 caused significant difficulties to financial institutions, so it would be worth enlightening practitioners and policymakers, even regulators, on the importance of considering the level of potential risk and risk monitoring as a key component in the decision-making process, to strengthen the stability and resilience of banks in an increasingly uncertain environment.

Originality/value

The issues raised in the paper are important in that Islamic banking is an integral part of the global banking and finance industry. This paper extends the knowledge of the potential importance of the new concept of risk governance with specific reference to Islamic banking industry peculiarities. It also provides a telling illustration of the need for the enhancements of the Basel Committee’s prudential requirements as well as the accounting and auditing organization for Islamic financial institutions and Islamic Financial Services Board set out especially regarding the consideration of risk in the strategic decision process.

Details

Journal of Financial Regulation and Compliance, vol. 30 no. 4
Type: Research Article
ISSN: 1358-1988

Keywords

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