Search results

The purpose of this paper is to design and develop a new robotic device for the rehabilitation of the upper limbs. The authors are focusing on a new symmetrical robot which can be used to rehabilitate the right upper limb and the left upper limb. The robotic arm can be automatically extended or reduced depending on the measurements of the patient's arm. The main idea is to integrate electrical stimulation into motor rehabilitation by robot. The goal is to provide automatic electrical stimulation based on muscle status during the rehabilitation process.

The developed robotic arm can be automatically extended or reduced depending on the measurements of the patient's arm. The system merges two rehabilitation strategies: motor rehabilitation and electrical stimulation. The goal is to take the advantages of both approaches. Electrical stimulation is often used for building muscle through endurance, resistance and strength exercises. However, in the proposed approach the electrical stimulation is used for recovery, relaxation and pain relief. In addition, the device includes an electromyography (EMG) muscle sensor that records muscle activity in real time. The control architecture provides the ability to automatically activate the appropriate stimulation mode based on the acquired EMG signal. The system software provides two modes for stimulation activation: the manual preset mode and the EMG driven mode. The program ensures traceability and provides the ability to issue a patient status monitoring report.

The developed robotic device is symmetrical and reconfigurable. The presented rehabilitation system includes a muscle stimulator associated with the robot to improve the quality of the rehabilitation process. The integration of neuromuscular electrical stimulation into the physical rehabilitation process offers effective rehabilitation sessions for neuromuscular recovery of the upper limb. A laboratory-made stimulator is developed to generate three modes of stimulation: pain relief, massage and relaxation. Through the control software interface, the physiotherapist can set the exercise movement parameters, define the stimulation mode and record the patient training in real time.

There are certain constraints when applying the proposed method, such as the sensitivity of the acquired EMG signals. This involves the use of professional equipment and mainly the implementation of sophisticated algorithms for signal extraction.

Functional electrical stimulation and robot-based motor rehabilitation are the most important technologies applied in post-stroke rehabilitation. The main objective of integrating robots into the rehabilitation process is to compensate for the functions lost in people with physical disabilities. The stimulation technique can be used for recovery, relaxation and drainage and pain relief. In this context, the idea is to integrate electrical stimulation into motor rehabilitation based on a robot to obtain the advantages of the two approaches to further improve the rehabilitation process. The introduction of this type of robot also makes it possible to develop new exciting assistance devices.

The proposed design is symmetrical, reconfigurable and light, covering all the joints of the upper limbs and their movements. In addition, the developed platform is inexpensive and a portable solution based on open source hardware platforms which opens the way to more extensions and developments. Electrical stimulation is often used to improve motor function and restore loss of function. However, the main objective behind the proposed stimulation in this paper is to recover after effort. The novelty of the proposed solution is to integrate the electrical stimulation powered by EMG in robotic rehabilitation.

The idea is to exploit the natural stability and performance of the human arm during movement, execution and manipulation. The purpose of this paper is to remotely control a handling robot with a low cost but effective solution.

The developed approach is based on three different techniques to be able to ensure movement and pattern recognition of the operator’s arm as well as an effective control of the object manipulation task. In the first, the methodology works on the kinect-based gesture recognition of the operator’s arm. However, using only the vision-based approach for hand posture recognition cannot be the suitable solution mainly when the hand is occluded in such situations. The proposed approach supports the vision-based system by an electromyography (EMG)-based biofeedback system for posture recognition. Moreover, the novel approach appends to the vision system-based gesture control and the EMG-based posture recognition a force feedback to inform operator of the real grasping state.

The main finding is to have a robust method able to gesture-based control a robot manipulator during movement, manipulation and grasp. The proposed approach uses a real-time gesture control technique based on a kinect camera that can provide the exact position of each joint of the operator’s arm. The developed solution integrates also an EMG biofeedback and a force feedback in its control loop. In addition, the authors propose a high-friendly human-machine-interface (HMI) which allows user to control in real time a robotic arm. Robust trajectory tracking challenge has been solved by the implementation of the sliding mode controller. A fuzzy logic controller has been implemented to manage the grasping task based on the EMG signal. Experimental results have shown a high efficiency of the proposed approach.

There are some constraints when applying the proposed method, such as the sensibility of the desired trajectory generated by the human arm even in case of random and unwanted movements. This can damage the manipulated object during the teleoperation process. In this case, such operator skills are highly required.

The developed control approach can be used in all applications, which require real-time human robot cooperation.

The main advantage of the developed approach is that it benefits at the same time of three various techniques: EMG biofeedback, vision-based system and haptic feedback. In such situation, using only vision-based approaches mainly for the hand postures recognition is not effective. Therefore, the recognition should be based on the biofeedback naturally generated by the muscles responsible of each posture. Moreover, the use of force sensor in closed-loop control scheme without operator intervention is ineffective in the special cases in which the manipulated objects vary in a wide range with different metallic characteristics. Therefore, the use of human-in-the-loop technique can imitate the natural human postures in the grasping task.

The aim of this paper is to present an online framework for building a domain taxonomy, called TaxoLine, from Web documents automatically.

TaxoLine proposes an innovative methodology that combines frequency and conditional mutual information to improve the quality of the domain taxonomy. The system also includes a set of mechanisms that improve the execution time needed to build the ontology.

The performance of the TaxoLine framework was applied to nine different financial corpora. The generated taxonomies are evaluated against a gold-standard ontology and are compared to state-of-the-art ontology learning methods.

The experimental results show that TaxoLine produces high precision and recall for both concept and relation extraction than well-known ontology learning algorithms. Furthermore, it also shows promising results in terms of execution time needed to build the domain taxonomy.

This paper aims to investigate perceptions of United Arab Emirates (UAE) real estate investors’ behaviour and the factors that most influence their investment decisions.

This study used a modified questionnaire that was divided into two parts. The first part covered demographic and socioeconomic variables. The second part identified 36 factors that affect the perceptions of real estate investors in the UAE regarding their investment decisions. These factors were placed in eight different categories that correspond to non-personal factors such as, profit, market conditions, risk, transparency, credit facilities (loans), infrastructure and services.

The findings confirm that there is a significant and positive relationship between three factors; namely, profitability, risk and service quality regarding investments in the real estate sector. The findings also confirm a positive but statistically insignificant relationship between transparency, market conditions, credit facilities, infrastructure and investment in the UAE’s real estate sector.

The sample size represents one of the limitations of this study. In addition, the gender of the sample is another limitation as, in general, men are more involved in investment than women are. Furthermore, there are no previous studies regarding the behaviour of UAE real estate investors; thus, the findings of this study cannot be directly compared with other empirical studies.

It might be helpful to create separate units under the name “Real Estate Information Unit” in every municipality of each of the seven emirates. In addition, it is recommended that decision makers should consider ensuring that modern high-quality real estate infrastructure is available to attract more investors. Finally, minimizing any restrictions on access financing facilities may encourage investors to invest more in the UAE real estate sector.

This study is the first of its kind to be conducted in the context of the behaviour of UAE real estate investors.

This study aims at investigating the impact of the disclosure and the Shariah governance on the financial performance in MENASA (Middle East, North Africa and Southeast Asia) Islamic banks.

We use the Generalized Least Squares (GLS) regression models to check the interdependence relationship between the disclosure, the Shariah governance and the financial performance of 47 Islamic banks (IBs) from ten countries operating in MENASA region. The sample period is from 2012 to 2019. In these regressions models, Return on Assets (ROA) and Return on Equity (ROE) are the dependent variables. The disclosure and the Shariah governance indicators are the independent factors. To measure the Shariah governance, we use the three sub-indices, which are the Board of Directors (BOD), the Audit Committee (AC) and the Shariah Supervisory Board (SSB). Size, Leverage and Age of the bank are used as control variables. We also used The Generalized Method of Moments (GMM) and the three-stage least squares (3SLS) estimations for robustness check.

Result shows a negative relationship between the disclosure and the two performance measures in IBs. Furthermore, as far as the governance indicators are concerned, we found that the BOD and AC, as well as the BOD and SSB, have a positive and significant impact on the ROA and ROE, respectively. This reveals that good governance had a significant association with higher performance in MENASA IBs.

The paper considers both IBs that adopt mandatory as well as voluntary AAOIFI standards and the GLS method to investigate the impact of the AAOIFI disclosure and the Shariah governance on ROA and ROE. Also, it uses the GMM and the 3SLS estimations for robustness check. It is relevant for researchers, policymakers and stakeholders concerned with IBs' performance.

The purpose of this study is to examine the level of Shariah governance disclosure among Islamic banks in Malaysia and the Gulf Cooperation Council (GCC) countries (i.e. Kuwait, Bahrain, United Arab Emirates, Qatar, Oman and Saudi Arabia). On top of that, the effect of Shariah governance disclosure on Islamic banks financial performance is investigated.

Data underwent quantitative content analysis and a mean comparison of the Shariah governance disclosure mechanisms as well as multiple regression analysis. Shariah governance information is obtained from the Islamic banks' official websites and the Bursa Malaysia Exchange.

The results of the content analysis revealed that the level of Shariah governance disclosure among Malaysian Islamic banks has been more pronounced than in the GCC countries. Additionally, the multiple regression analysis results specified that of the five Shariah governance disclosure mechanisms, the Shariah committee emerged as the strongest determinant in the financial performance of the Islamic banks, followed by transparency and disclosure.

Islamic banks should emphasise publishing Shariah governance information in annual reports to reflect superior accounting practices as assessed by certified Shariah auditors with an effective monitoring system.

The empirical findings are vital for serving as a guideline for Islamic banks in Malaysia and the GCC countries to disclose their practice of Shariah governance and gain empirical insights into its effect on firms’ financial performance. Following that, Islamic banks would improve their accounting practices while adhering to Shariah principles, strengthen internal controls and boost their brand reputation.

The Gulf Cooperation Council (GCC) countries form a unique socioeconomic environment that makes the conclusions of the prior literature not likely to be applicable. GCC countries have huge oil reserves, yet they are aiming at reducing oil dependency through enhancing transparency, increasing foreign direct investments and reforming their governance structure. Their firms are mainly family owned and have low female representation in leadership positions. The study seeks to fill a literature gap by providing a business case supporting the call for gender diverse boards for better governance.

The study examines a sample of GCC-listed firms for the years 2009–2018. Three measures are used to proxy for firm social engagement, namely, CSR strategy score, environmental, social and governance (ESG) disclosure score and social pillar score. To ensure whether the presence of women on board or the number of women on board is influential on social engagements, the authors use the existence of women on board and the percentage of women on board variables. Data are collected using Thomson Reuters, and generalized least squares (GLS) panel data regression is used to estimate relationships.

The authors find that female representation on GCC corporate boards is increasing, yet in a slow path. The reported results support the role of women on boards in prompting firms' social agenda and enhancing the level of sustainability reporting. The results also show that female board representation supports the implementation of climate change policy, business ethics policy and health and safety policy.

The paper evidence the add value of women participation on GCC corporate boards in enhancing boards' functionality and governance. The empirical findings encourage firms and policymakers in the GCC countries to increase the share of females on corporate boards to improve firms' citizenship and facilitate attracting foreign investors.

Leadership is basically about influence and ability to cultivate followership. This chapter examined the nature of indigenous socio-political leadership in Africa using Zimbabwe, Sudan and Nigeria as caselets and compared this with the post-colonial or modern-day leadership realities. A survey was conducted among senior executives at Lagos Business School, Nigeria, with a sample size of 200 persons, to find out their perception of the African indigenous leadership system. An overwhelming 90% believe that culture plays a big role in shaping African leadership style. However, two-thirds of the respondents agreed that Africa lacks proper institutional structures to support good leadership, thus encouraging corruption (97% of the respondents) and non-accountability among the leaders. Also, only 5% thought cultural orientation was the reason why the African followers do not hold their leaders accountable. In other words, it is not in the African culture not to hold leaders accountable for their actions. So, what went wrong? We attempted a deeper look at the effect of colonial rule and the attendant militarisation of the African continent. Our conclusion is that the colonisation of the continent by Europe brought significant distortion to the traditional African indigenous leadership institutions and the psyche of the African leader and the followers alike. Post-colonial Africa has witnessed 133 recorded coups d’etat between 1952 and 2016. This chapter is recommended to all those who seek a deeper understanding of the nature of the African indigenous leadership practices and the factors that have shaped these over the years.

The authors empirically investigate the association between acquisition, ownership structure and accrual earnings management (AEM) on real earnings management (REM) using Gulf Cooperation Council (GCC)-listed firms' context.

The authors' sample consists of 1,892 firm-year observations for the period from 2007–2017, and the authors adopt a panel data approach in investigating the interrelationships in this study. The authors employ different econometrics approach to test the authors' hypotheses.

The findings reveal that acquiring companies engage more in AEM if compared to REM. In terms of ownership structure, institutional ownership and state ownership mitigate the engagement in REM, whereas foreign ownership is found to be an ineffective mechanism in reducing engagement in REM. The authors report similar findings on ownership structure for AEM. The authors also find that the GCC firms engage more in REM when the firms engage in AEM, suggesting a complementary relation between these two earnings management techniques. These findings are robust after controlling for different aspects including any endogeneity issue in the authors' models.

The authors' research highlights the importance of understanding REM and AEM dynamics in GCC context. Also, the authors' findings on ownership structure suggest that GCC-listed firms can gain from institutional and state ownership which restricts earnings management, improving firm transparency and subsequently impacting firm performance.

This paper aims to examine the mediating effect of dividend payout on the relationship between internal governance mechanisms (board of directors and ownership structure) and the free cash flow level.

Linear regression models are used to investigate such relationships applying data from a sample of 207 non-financial firms listed on the Gulf Cooperation Council countries’ stock markets between 2009 and 2016. To test the significance of mediating effect, the author uses the Sobel test.

The author finds a partial mediation effect of dividend on the relationship between both board independence and managerial ownership and the level of free cash flow. The results confirm the major role of outside directors in corporate governance. This governance mechanism contributes to the protection of shareholders’ interests through a generous dividend policy. However, the author finds that large managerial shareholdings increase the level of free cash flow through lower dividend payouts. This result suggests that powerful managers follow their preference of retaining excess cash to their own interests.

This paper offers insights to policy-makers of emerging economies interested in the development of the corporate governance. This study provides guidance for firms in the construction and implementation of their own corporate governance policies.

The main contribution of the present paper is to examine the dividend payout as a potential mediating variable between internal governance mechanisms and free cash flow. Moreover, it highlights the issue of efficient management of substantial funds in Sharia-compliant and non-Sharia-compliant firms.