bluuebunny/crossref_metadata_2025_split huggingface dataset:
sEMG-based variable impedance control of lower-limb rehabilitation robot using wavelet neural network and model reference adaptive control
Authors: Hasanzadeh Fereydooni Rohollah , Siahkali Hassan , Shayanfar Heidar Ali , Mazinan Amir Houshang 
Published: February 2020

Purpose
This paper aims to propose an innovative adaptive control method for lower-limb rehabilitation robots.

Design/methodology/approach
Despite carrying out various studies on the subject of rehabilitation robots, the flexibility and stability of the closed-loop control system is still a challenging problem. In the proposed method, surface electromyography (sEMG) and human force-based dual closed-loop control strategy is designed to adaptively control the rehabilitation robots. A motion analysis of human lower limbs is performed by using a wavelet neural network (WNN) to obtain the desired trajectory of patients. In the outer loop, the reference trajectory of the robot is modified by a variable impedance controller (VIC) on the basis of the sEMG and human force. Thenceforward, in the inner loop, a model reference adaptive controller with parameter updating laws based on the Lyapunov stability theory forces the rehabilitation robot to track the reference trajectory.

Findings
The experiment results confirm that the trajectory tracking error is efficiently decreased by the VIC and adaptively correct the reference trajectory synchronizing with the patients’ motion intention; the model reference controller is able to outstandingly force the rehabilitation robot to track the reference trajectory. The method proposed in this paper can better the functioning of the rehabilitation robot system and is expandable to other applications of the rehabilitation field.

Originality/value
The proposed approach is interesting for the design of an intelligent control of rehabilitation robots. The main contributions of this paper are: using a WNN to obtain the desired trajectory of patients based on sEMG signal, modifying the reference trajectory by the VIC and using model reference control to force rehabilitation robot to track the reference trajectory.
Conflict factors investigation among construction professionals in Nigeria
Authors: Adeyemi Benjamen Sunkanmi , Aigbavboa Clinton Ohis 
Published: February 2020

Purpose
This paper aims to determine various factors that cause conflict among professionals in the Nigerian construction industry.

Design/methodology/approach
This study made use of quantitative approach. Questionnaires were used as a form of data collection, and it was distributed to construction professionals such as quantity surveyors, architects, builders, civil engineers, project managers and construction managers in Ondo and Lagos state to ascertain various factors that cause conflict among professionals in the Nigerian construction industry. A total number of 150 questionnaires were distributed, but 135 were received from the respondents that represent 90 per cent of response rate. In this study, the descriptive analysis and exploratory factor analysis were used.

Findings
The findings from this study show that the major cause of conflict among the professionals is favouritism. This is followed by role ambiguity that occurs due to improper definition of the role of different construction professionals, and it leads to a misunderstanding culminating into conflict. Also, other major causes of conflict among construction professionals in Nigeria include differences in professionals’ experience, differences in level of education, differences in personalities and differences in professionals’ goal and views.

Originality/value
It should be emphasized that professionals must avoid and desist from any factors that can cause conflict among them. Strict adherence by construction professionals in Nigeria will encourage free flow of ideas and will help them progress. This will actually lead to improvement on professionals tasks.
Time-dependent safety performance of reinforced concrete structures
Authors: Woju Utino Worabo , Balu A.S. 
Published: February 2020

Purpose
Performance of the structure depends on design, construction, environment, utilization and reliability aspects. Other factors can be controlled by adopting proper design and construction techniques, but the environmental factors are difficult to control. Hence, mostly in practice, the environmental factors are not considered in the analysis and design appropriately; however, their impact on the performance of the structures is significant along with the design life. It is in this light that this paper aims to perform the time-dependent performance analysis of reinforced concrete structures majorly considering environmental factors.

Design/methodology/approach
To achieve the intended objective, a simply supported reinforced concrete beam was designed and detailed as per the Euro Code (EC2). The time-dependent design parameters, corrosion parameters, creep and shrinkage were identified through thorough literature review. The common empirical equations were modified to consider the identified parameters, and finally, the time-dependent performance of reinforced concrete beam was performed.

Findings
Findings indicate that attention has to be paid to appropriate consideration of the environmental effect on reinforced concrete structures. In that, the time-dependent performance of reinforced concrete beam significantly decreases with time due to corrosion of reinforcement steel, creep and shrinkage.

Originality/value
However, the Euro code, Ethiopian code and Indian code threat the exposure condition of reinforced concrete by providing corresponding concrete cover that retards the corrosion initiation time but does not eliminate environmental effects. The results of this study clearly indicate that the capacity of reinforced concrete structure degrades with time due to corrosion and creep, whereas the action on the structure due to shrinkage increases. Therefore, appropriate remedial measures have to be taken to control the defects of structures due to the environmental factors to overcome the early failure of the structure.
Three-dimensional analysis of anchored wall with concrete bearing pads
Authors: Arefizadeh Hamed , Shahir Hadi 
Published: February 2020

PurposeAnchorage with concrete bearing pad is commonly used in Iran for stabilization of excavations because of the ease of construction, less costs and less time consumption than the soldier pile method. In this method, a wall facing which includes the concrete bearing pads at the location of the anchors and a shotcrete layer between the bearing pads is constructed parallel to the excavation operation similar to the nailing method.Design/methodology/approachIn this paper, using the finite element software Abaqus, a three-dimensional model of the above-mentioned type of wall is constructed, and the effect of spacing and size of bearing pads on the wall behavior is discussed.FindingsAccording to the obtained results, the size of the concrete bearing pads has little effect on wall deformations, but the internal forces and bending moments developed in the shotcrete layer between the bearing pads are greatly influenced by the bearing pads dimensions and spacing.Originality/valueOwing to the discrete elements of the wall facing, the behavior of this system is completely three-dimensional.
Assessment of corruption in the humanitarian assistance in Puntland State of Somalia
Authors: Sofe Abdinur Abdirisak 
Published: February 2020

Purpose
Corruption in humanitarian aid is one of the most worried and worst problems around the world. The existence of corruption acts in humanitarian aid delivery can endanger the already susceptible lives of the neediest individuals in the community. Amid serious humanitarian allegation in the country, this study aims to capture meaningful insights in humanitarian aid corruption in Puntland State of Somalia.

Design/methodology/approach
The study applied qualitative method and used interview as a technique of data collection. The information obtained through the interview was analyzed by quoting and narration forms.

Findings
The findings indicated numerous acts of corruption in all project stages including corruption in project granting and humanitarian staff employment, distortion of project targets and diversion of humanitarian project from targeted communities. The research also found that governmental and non-governmental actors are involved in the humanitarian corruption such as project managers and support staffs in addition to line ministries, parliament and community representatives.

Research limitations/implications
Corruption is a taboo and is difficult to research; people do not want to share the information for fear of victimization. Concerned institutions were not willing to provide necessary materials which led to shortage of secondary data. Another problem encountered during the study has been that the humanitarian stakeholders (for instance, government, non-government and private institutions) acted reluctantly to cooperate because of suspicion that disclosing information may lead to negative effect on their business. To overcome the challenges, the study assured the confidentiality of the members and that information collected would be used for research purposes only. The study further combined various tools of data collection so that the weakness of one tool becomes the strength of the other; while the researcher made efforts to build rapport with the research participants.

Originality/value
This study will contribute to the literature on corruption in the humanitarian aid. Specifically, the findings of this study will benefit academicians/researchers by giving empirical insights of corruption in the humanitarian aid in Puntland. It will benefit the government policymakers in the formulation of policies to combat corruption in the sector. Donors and aid agencies may also find the findings useful as they are key stakeholders who are interested in corruption in the humanitarian sector and finally the findings will benefit the wider society that is the primary victim of corruption in the humanitarian sector.
Understanding and controlling financial fraud in the drug industry
Authors: Akomea-Frimpong Isaac , Andoh Charles 
Published: February 2020

PurposeThis study aims to assess the fraud cases, factors and control measures of financial fraud in the drug industry with evidence from Ghana. Drug industry and pharmaceutical are the same, and they are used interchangeably in this study.Design/methodology/approachData from questionnaires were collected from 412 manufacturers, wholesalers and retailers of the drug industry. Data were presented and analysed with descriptive statistics and probit regression.FindingsResults show that, in general, stealing of drugs, stealing of cash, usage of fake cheques, falsified documents and dubious accounting practices are some of the fraud cases in the industry. Factors such as gender, educational level, religious beliefs, regulatory 7measures, pressure, rationalization and opportunities influence financial fraud in the drug industry. Control measures such as thorough assessment of products, regular review of fraud policies, installation of fraud-detection software and effective internal systems could reduce the menace.Research limitations/implicationsThe paper addresses a number of theoretical and systemic issues on financial fraud in the drug industry but with limited specific quantitative data or calculations as well as limited sample size. Further studies could offer a more quantitative approach with a larger sample size in an attempt, for instance, to estimate the financial costs of financial fraud to the drug industry.Practical implicationsThis paper openly tackles various attempted frauds and financial malfeasances from stakeholder perspectives in the drug industry. Practical measures have been given to tackle the consequences of the menace.Originality/valueThis paper is geared towards providing valuable learning points for stakeholders in the drug industry to handle daily operations to assist them in detecting and preventing similar occurrence of financial fraud.
Legal analysis of Qatar’santi-money laundering and combating terrorist financing legislation and regulation amidst the summer 2017 GCC crisis
Authors: Naheem Mohammed Ahmad 
Published: February 2020

Purpose
The recent diplomatic split between members of the Gulf Cooperation Council (GCC) and Qatar with accusations of terrorist financing (TF). This paper aims to study Qatar’s domestic legislations, which specifically targets money laundering and TF activities. The country has stringently worked in compliance with international standards on combating financing of terrorism (CFT) and anti-money laundering (AML) practices by imparting autonomous power to regulatory bodies, such as the Qatar Central Bank and other agencies.

Design/methodology/approach
This paper studies independent legislations passed under the Emir’s decree over the past decade advancing Qatar’s AML ranking, with significant effort in CFT regulations. The paper also analyses the advancement in AML/CFT regulation and their validity with respect to international standards set by various governmental, intergovernmental and non-profit agencies.

Findings
The analysis finds Qatar in compliance with strong AML/CFT regulations. Further, it finds the government to have provided transparent oversight to international organizations that attest to the findings of the legislative efforts. This paper disproves claims and accusations that have possibly been presented to the GCC and subsequently led members to abruptly end diplomatic relations with Qatar over allegations of TF activities, amongst others.

Originality/value
The paper offers insight into Qatar’s legislative and regulatory advancement with respect to the AML/CTF in the past decade. The paper also discusses Qatar’s legislative advancement in relation to the evolutions of the country’s financial system, adopting a more robust mechanism to combat financing of terrorism and ML.
Impacts of uncertain online reviews on pricing and profits of competitive retailers
Authors: Zhao Cui , Zhang Yao 
Published: February 2020

Purpose
This paper aims to investigate the impacts of uncertain online reviews on product prices and profits of two competitive retailers.

Design/methodology/approach
First, the authors develop a game-theoretical model to determine the optimal product prices and profits considering uncertain online reviews. Afterwards, to examine the effects of the uncertain online reviews, they compare the equilibrium solutions with those of the game-theoretical models of deterministic online reviews and no online reviews, respectively.

Findings
Uncertain online reviews play a significant role in product price optimization and profit maximization. In the quality-dominates-fit case, both retailers will lower their product prices in response to the uncertain online reviews. And the uncertain online reviews would hurt the two retailers. Conversely, in the fit-dominates-quality case, the presence of uncertain online reviews will encourage both retailers to raise their product prices. And the two retailers can still benefit from the online reviews. With the increase in consumer uncertainty about online reviews, both retailers might raise their product prices, thus generating higher profits.

Practical implications
Managerially, the results indicate that in the quality-dominates-fit case, when consumers are uncertain about online reviews, it might be better for retailers to abandon the online review system; however, in the fit-dominates-quality case, both retailers could still benefit from the uncertain online reviews through product price optimization. Therefore, the presence of an online review system could be beneficial.

Originality/value
This paper develops a game-theoretical model to help competitive retailers optimize their price strategies and achieve profit maximization considering uncertain online reviews.
The impact of religious values in the Jordanian political discourses on public opinion (field study on universities students)
Authors: Ebniya Zaid Odeh 
Published: February 2020

PurposeThe purpose of this study is to know the effect of religious values that the Jordan Political discipline adopted and were mentioned in the Jordan political discourses (Amman Message 2005, discourse of King Abdullah II in the European Parliament 2008 and his discourse in United Nations 2015) on the public opinion of the university students, especially their attitudes toward terrorism and extremism. Defending Islam is the responsibility of the Jordan political leadership according to Hashemite legacy and promoting Islamic values that rejected terrorism and extremism to Jordanian youth, especially tolerance and moderation values, to counter defamations and claims against Islam and correct its image in the West.Design/methodology/approachA political discourse analysis approach was used by analyzing the Amman Message and identifying the most important religious values contained therein. Also, a quantitative research method was used in this study. The study population consisted of university students, particularly Jordanian University students because being one of the high-bred Jordanian universities, it is characterized with gender, age, regional affiliation and family income diversities. This study depends on a purposive sample containing 350 students (175 males and 175 females). The survey was conducted in the academic year (2018-2019). A questionnaire that was reviewed by three jurors was used in data collection.FindingsThe results of the analysis of the political discourse showed that the values of tolerance and moderation are among the most valued in the Amman Message, where they were frequently repeated. Also, findings have shown that the religious values adopted by the Jordanian political system mentioned in the political discourses had an impact on public opinion of university students on terrorism and extremism causes in a large percent. When gender differed (males and females), the impact ratio of the public opinion for males was higher than that for females. When the age group differed (18-22 and 23-30 years), the effect ratio with the old age group was higher than the effect ratio for the students with the youngest age group. When regional affiliation differed (Jordanian and Jordanian of Palestinian origin), the impact ratio of the public opinion for Jordanian students was higher than that for Jordanian students of Palestinian origin. When regional family income differed (500 dinars and less, more than 500 dinars), the impact ratio of the public opinion for students with family income more than 500 dinars was higher than that for students with family income 500 dinars and less.Originality/valueThis study represents an approach to recognize the effect of religious values that were adopted by the Jordanian political system mentioned in the political discourses on public opinion of university students on terrorism and extremism causes, considering that university students represent the influential youth group in the Jordanian society.
The role of heating and cooling in viscous sintering of pairs of spheres and pairs of cylinders
Authors: Polychronopoulos Nickolas D. , Vlachopoulos John 
Published: February 2020

Purpose
This study aims to develop mathematical models for the determination of the effects of heating or cooling on neck growth in Selective Laser Sintering (SLS) and Fused Filament Fabrication (FFF). Two particle shapes are studied: spherical and cylindrical.

Design/methodology/approach
The time required for the coalescence (sintering) process is determined by balancing the work of surface tension forces and viscous dissipation. Heating and cooling effects are studied by incorporating temperature dependence of viscosity in an exponential form. Heating by a laser, convective and/or radiative heat transfer is assumed. It is also assumed that there are no temperature gradients within the coalescing molten polymers (lumped parameter heat transfer analysis).

Findings
The models predict faster sintering with heating and slower with cooling, as expected because of the effect of temperature on viscosity. For the isothermal case of pairs of cylinders, the present model predicts significantly longer time for completion of sintering than a previously developed and frequently cited model by Hopper.

Originality/value
An isothermal sintering model for two spheres was reworked for two long cylinders, and for the first time it has been compared to other models available in the literature. The mathematical models are capable of predicting neck growth under non-isothermal conditions for both spheres and cylinders. They are useful in assessment of bonding in selective laser sintering and fused deposition fabrication.
Mechanical characterization of 3D printed, non-planar lattice structures under quasi-static cyclic loading
Authors: McCaw John C.S. , Cuan-Urquizo Enrique 
Published: February 2020

Purpose
While additive manufacturing via melt-extrusion of plastics has been around for more than several decades, its application to complex geometries has been hampered by the discretization of parts into planar layers. This requires wasted support material and introduces anisotropic weaknesses due to poor layer-to-layer adhesion. Curved-layer manufacturing has been gaining attention recently, with increasing potential to fabricate complex, low-weight structures, such as mechanical metamaterials. This paper aims to study the fabrication and mechanical characterization of non-planar lattice structures under cyclic loading.

Design/methodology/approach
A mathematical approach to parametrize lattices onto Bèzier surfaces is validated and applied here to fabricate non-planar lattice samples via curved-layer fused deposition modeling. The lattice chirality, amplitude and unit cell size were varied, and the properties of the samples under cyclic-loading were studied experimentally.

Findings
Overall, lattices with higher auxeticity showed less energy dissipation, attributed to their bending-deformation mechanism. Additionally, bistability was eliminated with increasing auxeticity, reinforcing the conclusion of bending-dominated behavior. The analysis presented here demonstrates that mechanical metamaterial lattices such as auxetics can be explored experimentally for complex geometries where traditional methods of comparing simple geometry to end-use designs are not applicable.

Research limitations/implications
The mechanics of non-planar lattice structures fabricated using curved-layer additive manufacturing have not been studied thoroughly. Furthermore, traditional approaches do not apply due to parameterization deformations, requiring novel approaches to their study. Here the properties of such structures under cyclic-loading are studied experimentally for the first time. Applications for this type of structures can be found in areas like biomedical scaffolds and stents, sandwich-panel packaging, aerospace structures and architecture of lattice domes.

Originality/value
This work presents an experimental approach to study the mechanical properties of non-planar lattice structures via quasi-static cyclic loading, comparing variations across several lattice patterns including auxetic sinusoids, disrupted sinusoids and their equivalent-density quadratic patterns.