bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evaluation of 3D markerless motion capture accuracy using OpenPose with multiple video cameras
Authors: Nakano Nobuyasu , Sakura Tetsuro , Ueda Kazuhiro , Omura Leon , Kimura Arata , Iino Yoichi , Fukashiro Senshi , Yoshioka Shinsuke 
Published: November 2019

AbstractThere is a need within human movement sciences for a markerless motion capture system, which is easy to use and suffciently accurate to evaluate motor performance. This study aims to develop a 3D markerless motion capture technique, using OpenPose with multiple synchronized video cameras, and examine its accuracy in comparison with optical marker-based motion capture. Participants performed three motor tasks (walking, countermovement jumping, and ball throwing), with these movements measured using both marker-based optical motion capture and OpenPose-based markerless motion capture. The differences in corresponding joint positions, estimated from the two different methods throughout the analysis, were presented as a mean absolute error (MAE). The results demonstrated that, qualitatively, 3D pose estimation using markerless motion capture could correctly reproduce the movements of participants. Quantitatively, of all the mean absolute errors calculated, approximately 47% were less than 20 mm and 80% were less than 30 mm. However, 10% were greater than 40 mm. The primary reason for mean absolute errors exceeding 40mm was that OpenPose failed to track the participant’s pose in 2D images owing to failures, such as recognition of an object as a human body segment, or replacing one segment with another depending on the image of each frame. In conclusion, this study demonstrates that, if an algorithm that corrects all apparently wrong tracking can be incorporated into the system, OpenPose-based markerless motion capture can be used for human movement science with an accuracy of 30mm or less.
Bombs and cocaine: detecting nefarious nitrogen sources using remote sensing and machine learning
Authors: Adams Christopher , Chee Soo Mei , Bell David , Windram Oliver P.F. 
Published: November 2019

AbstractPlants are treated with synthetic or organic nitrogen sources to increase growth and yield, the most common being calcium ammonium nitrate. However, some nitrogen sources are used in illicit activities. Ammonium nitrate is used in explosive manufacture and ammonium sulphate in the cultivation and extraction of the narcotic cocaine fromErythroxylum spp. Here we show that hyperspectral sensing, multispectral imaging and machine learning image analysis can be used to visualise and differentiate plants exposed to different nefarious nitrogen sources. Metabolomic analysis of leaves from plants exposed to different nitrogen sources reveals shifts in colourful metabolites that may contribute to altered reflectance signatures. Overall this suggests that different nitrogen feeding regimes alter plant secondary metabolism leading to changes in the reflectance spectrum detectable via machine learning of multispectral data but not the naked eye. Our results could facilitate the development of technologies to monitor illegal activities involving various nitrogen sources and further inform nitrogen application requirements in agriculture.
An endophytic bacteria (Pseudomonas aeruginosa) strain translocated and protected tomato (Solanum lycopersicum L.) plants from its parasitic weed Phelipanche aegyptiaca
Authors: Kruh Lilach Iasur , Abu-Nassar Jacline , Lidor Ofir , Aly Radi 
Published: November 2019

AbstractPhelipanche aegyptiaca is an obligate holo-parasitic weed lacking a functional photosynthetic system, which subsists on roots of a wide range of host crops, causing severe losses in yield quality and quantity. The parasite and its host are connected through their vascular system, forming a unique ecological system that enables the exchange of various substances. In a previous study, it was suggested that endophytic bacteria, which naturally inhabit the internal tissues of plants, can also be transmitted from the parasitic weed to its host and vice versa.In the current study, we investigate the characteristics of a previously isolated Pseudomonas sp. PhelS10 strain, using both biochemical and molecular methods. Our results revealed that production of Pseudomonas aeruginosa quinolone signal (PQS) was 2.1 times higher than that of the standard Pseudomonas aeruginosa strain (PAO1), which contributed to a 22% higher biofilm formation capability. PhelS10 strain was detected in the xylem of tomato plants using FISH analysis. In addition, PhelS10 strain was found in the parasitic weed’s inner tissues, confirming the hypothesis that endophytic bacteria traffic between the plant host and its parasitic weed.
Meso-scale multi-material fabrication of a Synthetic ECM Mimic for In vivo-like Peripheral Nerve Regeneration
Authors: Wieringa Paul , de Pinho Ana Rita Gonçalves , Truckenmüller Roman , Micera Silvestro , van Wezel Richard , Moroni Lorenzo 
Published: November 2019

AbstractA growing focus and continuing challenge for biological sciences is creating representative in vitro environments to study and influence cell behavior. Here, we describe the synthetic recreation of the highly ordered extracellular matrix (ECM) of the peripheral nervous system (PNS) in terms of structure and scale, providing a versatile 3D culturing platform that achieves some of the highest in vitro neurite growth rates so far reported. By combining electrospinning technology with a unique multi-material processing sequence that harnesses intrinsic material properties, a hydrogel construct is realized that incorporates oriented 6 μm-diameter microchannels decorated with topographical nanofibers. We show that this mimics the native PNS ECM architecture and promotes extensive growth from primary neurons; through controlled variation in design, we show that the open lumens of the microchannels directing rapid axon invasion of the hydrogel while the nanofibers provide essential cues for cell adhesion and topographical guidance. Furthermore, these microstructural and nanofibrillar elements enabled a typically bioinert hydrogel (PEGDA) to achieve similar neurite extension when compared to a biocompatible collagen hydrogel, with PEGDA-based devices approaching neurite growth rates similar to what is observed in vivo. Through the accessible fabrication approach developed here, multi-material scaffolds were designed with cell-relevant architectures ranging from meso-to nanoscale and shown to support nerve growth to mimic PNS regeneration, with potential for regenerative medicine and neural engineering applications.
Accounting for the cost of sports-related violence
Authors: Baxter Jane , Carlsson-Wall Martin , Chua Wai Fong , Kraus Kalle 
Published: November 2019

Purpose
The purpose of this paper is to extend the understanding of “the” accounting entity, demonstrating how it is a contestable socio-political construction informed by a nexus of market, state and community actors.

Design/methodology/approach
A case study method is utilised to follow debate relating to Swedish football clubs’ responsibility for the payment/non-payment of policing costs between 1999 and 2014. The case study uses documentary and interview data, focusing on one of the high-risk Stockholm clubs.

Findings
The paper makes four main contributions: first, demonstrating how the accounting entity is a changeable and contestable construction; second, outlining how distinctions informing contests about the accounting arena are materialised through accounting calculations and other devices; third, showing the importance of community in a coordinated sense in mediating accounting practices; and fourth, contributing to the literature on accounting and sport, highlighting the importance of state actors in this arena.

Originality/value
This research draws on original empirical data providing unique insights into debates regarding the responsibility for the payment of police costs in the context of sports-related violence. The authors show the importance of characterising accounting for sporting organisations as a shifting and contestable nexus of market, state and community actors.
Experimental verification of volt-ampere characteristic curve for a memristor-based chaotic circuit
Authors: Xiong Li , Zhang Xinguo , Chen Yan 
Published: November 2019

PurposeThe ammeter can measure the direct current and low-frequency alternating current through the wires, but it is difficult to measure complex waveforms. The oscilloscope can measure complex waveforms, but it is easy to measure the voltage waveform and difficult to measure the current waveform. Thus, how to measure complex current waveforms with oscilloscope is an important and crucial issue that needs to be solved in practical engineering applications. To solve the above problems, an active short circuit line method is proposed to measure the volt-ampere characteristic curve of chaotic circuits.Design/methodology/approachIn this paper, an active short circuit line method is proposed to measure the volt-ampere characteristic curve of various chaotic circuits especially for memristive systems. A memristor-based chaotic system is introduced, and the corresponding memristor-based circuit is constructed and implemented by using electronic components.FindingsThe chaotic attractors and volt-ampere characteristic curve of the memristor-based chaotic circuit are successfully analyzed and verified by oscilloscope measurement with the proposed active short circuit line method. Accordingly, the hardware circuit experiments are carried out to validate the effectiveness and feasibility of the active short circuit line method for these chaotic circuits. A good agreement is shown between the numerical simulations and the experimental results.Originality/valueThe primary contributions of this paper are as follows: an active short circuit line method for measuring the volt-ampere characteristic curve of chaotic circuits is proposed for the first time. A memristor-based chaotic system is also constructed by using memristor as nonlinear term. Then, the active short circuit line method is applied to measure the volt-ampere characteristic curve of the corresponding memristor-based chaotic circuit.
Travelers’ perception of service quality at Dubai International Airport
Authors: Awad Mahmoud , Alzaatreh Ayman , AlMutawa Alia , Al Ghumlasi Hind , Almarzooqi Mariam 
Published: November 2019

PurposeDubai’s aviation industry is one of the most leading global aviation centers with a customer centric focus and tremendous challenges. The purpose of this paper is to determine the main Airport service quality (ASQ) drivers and evaluate the perception of travelers of Dubai International Airport (DXB) terminal 3.Design/methodology/approachTravelers’ feedback is captured through interviews, initial survey and online review, and a more focused survey is developed as the main research tool. A hypothetical model is proposed and analyzed using confirmatory factor analysis (CFA) and structural equation modeling (SEM). The sample includes 275 passengers who had experience with DXB services.FindingsThe CFA supported by SEM was used and reveled check-in, assurance and empathy, and availability to some extent as the main constructs influencing travelers’ satisfaction and impression of DXB. Moreover, Kruskal–Wallis test suggested that nationality impact travelers’ experience of the airport. The study stresses the need to consider differences in perceptions among different travelers’ groups with different ethnical backgrounds.Research limitations/implicationsThe external validity of the results can be enhanced by including more terminals and larger sample size. Terminal 3 is administered by one company and provide services for one airline. Focusing on terminal 3 only improves the internal validity of this study but limits the external one.Practical implicationsDecision makers can use the findings to improve travelers’ experience at airport. For example, customizing services for certain groups can improve experience of travelers significantly.Originality/valueBased on the surveyed literature, there is little information or guidance on how to cluster constructs that best describe passengers’ journey in airports. Second, there are some conflicting results regarding the impact of nationalities and purpose of travel on travelers’ satisfaction. The purpose of this paper is to address the two gaps and identify factors that influence ASQ at DXB terminal 3. The investigation would help DXB management to understand what makes travelers satisfied during their journey at the airport.
Optimal parameters and tolerances in concurrent product and process design using simulation and fuzzy goal programming
Authors: Al-Refaie Abbas , Haddadin Mays , Qabaja Alaa 
Published: November 2019

Purpose
The purpose of this paper is to propose an approach to determine the optimal parameters and tolerances in concurrent product and process design in the early design stages utilizing fuzzy goal programming. A wheelchair design is provided for illustration.

Design/methodology/approach
The product design is developed on the basis of both customer and functionality requirements. The critical product components are then determined. The design and analysis of experiments are performed by using simulation, and then the probability distributions are adopted to determine the values of desired responses under each combination of critical product parameters and tolerances. Regression nonlinear models are then developed and inserted as constraints in the complete optimization model. Preferences on product specifications and process settings, as well as process capability index ranges, are also set as model constraints. The combined objective functions are finally formulated to minimize the sum of positive and negative deviations from desired targets and maximize process capability. The optimization model is applied to determine the optimal wheelchair design.

Findings
The results showed that the proposed approach is effective in determining the optimal values of the design parameters and tolerances of the critical components of the wheelchair with their related process means and standard deviations that enhance desired multiple quality responses under uncertainty.

Practical implications
This work provides a general methodology that can be applied for concurrent optimization of product design and process design in a wide range of business applications. Moreover, the methodology is beneficial when uncertainty exists in quality responses and the parameters and tolerances of product design and its critical processes.

Originality/value
The fuzziness is rarely considered in research and development stage. This research considers membership functions for parameters and tolerances of a product and its related processes rather than crisp values. Moreover, presented optimization model considers multiple objective functions, sum of deviations and process capability. Finally, the indirect quality responses are calculated from the best-fit probability distributions rather than assuming a normal distribution.
Fatigue damage severity assessment of RC beam
Authors: Md Nor Noorsuhada , Mat Saliah Soffian Noor , Ibrahim Azmi , Mohd Saman Hamidah , Muhamad Bunnori Norazura 
Published: November 2019

Purpose
The purpose of this paper is to present the investigation of damage severity of reinforced concrete (RC) beam subjected to increasing fatigue loading using intensity of acoustic emission (AE) signal.

Design/methodology/approach
Together 17 RC beams with dimension of 150 × 150 × 750 mm were prepared. Third point loading fatigue test was performed based on load at the first crack (Pcr) and the ultimate static load (Pult). The frequency of 1 Hz was used with the increasing fatigue loadings, 0.5Pcr (P1), 0.8Pcr (P2), 1.0Pcr (P3), 0.2Pult (P4), 0.5Pult (P5) and 0.6Pult (P6). The damage severity of crack for each phase of loading allowed the identification of the crack modes of the beams, namely, Zone A (no significant emission), Zone B (minor), Zone C (intermediate), Zone D (follow-up) and Zone E (major).

Findings
The intensity analysis indicated clear trend with respect to crack propagation in the beam and, hence, can be used to monitor the crack occurrence in the beam.

Originality/value
The intensity analysis has been carried out for the beam subjected to increasing fatigue loading. The analysis was based on the AE data obtained from channel basis and located event.
Social capital and social ties in organisations: a case study of two voluntary sports clubs
Authors: Tacon Richard 
Published: November 2019

Purpose
If social capital is understood as the ability to access resources through social ties, it is clearly important to understand how people form social ties and what types of ties they form. Research has sought to do this, but it has seldom directly examined how organisations shape these processes and outcomes. The paper aims to discuss this issue.

Design/methodology/approach
In-depth, comparative case study research was conducted at two voluntary sport organisations in the UK, involving 23 in-depth interviews and participant observation over a 15-month period.

Findings
The case studies showed how key organisational practices structured, in meaningful ways, people’s opportunities for interaction and the nature of that interaction, shaping the ways in which they formed ties and exchanged resources. The organisations fostered the formation of both strong and weak ties, but also “compartmentally intimate” ties.

Research limitations/implications
The research challenges individualistic, rational choice accounts of tie formation, highlighting the role of organisations as brokers. In addition, interviewees’ accounts challenge well-accepted distinctions between strong and weak ties, by demonstrating the importance of ongoing, context-specific interaction.

Originality/value
This research offers a rare, direct insight into the role of organisations in shaping people’s ongoing social relationships. In doing so, it problematises existing conceptualisations of social capital and social ties and highlights an alternative, organisationally embedded, process-based perspective on social capital.
The landscape of research on learning in low-tech environments
Authors: Campana Kathleen , Agarwal Naresh Kumar 
Published: November 2019

PurposeThis paper aims to review the landscape of research in pedagogy and learning that surmounts the challenges of low-tech, information-rich environments during the past decade. It also reviews the methods used, populations studied and places where such research was carried out and proposes a conceptual framework.Design/methodology/approachA scoping review methodology was used to provide initial, broad insight into the field of learning in low tech environments.FindingsThe study found that low tech was not a barrier when it came to effectiveness of pedagogy and learning. In addition, it became apparent that active learning strategies combined with no-tech, low-tech and high-tech resources and strategies can lead to learning environments that are learner-centered, knowledge-centered, assessment-centered and community-centered.Originality/valueThe authors propose the framework for learning in low-tech, information-rich environments, which can be used by researchers, educators, practitioners and policymakers in environments with low technology, or in those with high technology seeking to transfer expertise and technology to these areas.
Global brain-reflective accounting practices
Authors: Al-Htaybat Khaldoon , Hutaibat Khaled , von Alberti-Alhtaybat Larissa 
Published: November 2019

PurposeThe purpose of this paper is to explore the intersection of accounting practices and new technologies in the age of agility as a form of intellectual capital, through sharing the conceptualization and real implications of accounting and accountability ideas in exploring and deploying new technologies, such as big data analytics, blockchain and augmented accounting practices and expounding how they constitute new forms of intellectual capital to support value creation and realise Sustainable Development Goals (SDGs).Design/methodology/approachThe adopted methodology is cyber-ethnography, which investigates online practices through observation and discourse analysis, reflecting on new business models and practices, and how accounting relates to these developments. The global brain sets the conceptual context, which reflects the distributed network intelligence that is created through the internet.FindingsThe main findings focus on various developments of accounting practice that reflect, utilise or support digital companies and new technologies, including augmentation, big data analytics and blockchain technology, as new forms of intellectual capital, that is knowledge and skills within organisations, that have the potential to support value creation and realise SDGs. These relate to and originate from the global brain, which constitutes the umbrella of tech-related intellectual capital.Originality/valueThis paper determines new developments in accounting practices in relation to new technologies, due to the continuous expansion and influence of the intelligence of the collective network, the global brain, as forms of intellectual capital, contributing to value creation, sustainable development and the realisation of SDGs.
The impact of a dysfunctional leader on the workplace: a new challenge for HRM
Authors: Holland Peter 
Published: November 2019

PurposeWhilst several studies investigate the attributes of dysfunctional leaders exhibiting corporate psychopathic traits, there is a paucity of longitudinal data exploring the way these leaders damage employees and the organisation. The purpose of this paper is to address this gap in the literature and provide a focus for HR to address these emerging issues within organisations.Design/methodology/approachA longitudinal and in-depth case study approach is taken to explore the impact on a workplace of a dysfunctional leader exhibiting the traits of a corporate psychopath. A framework is used to analyse the nuances of the behaviours, in particular bullying behaviours and the impact of this leadership style on the workforce over a five-year period.FindingsThe long-term negative effects of this type of leadership are identified through a detailed analysis of a trait commonly associated with this toxic style of leader, bullying behaviours and their consequences.Research limitations/implicationsWhilst a single case study allows for in-depth analysis, it may be seen as atypical and of limited application. However, the longitudinal approach is ideal to investigate the nuance of how a highly dysfunctional leader operates within and through the multiple layers of an organisation.Practical implicationsThe paper identifies the traits and effects of a dysfunctional leader on an organisation to enable the organisation primarily through human resources to deal with them and their behaviours.Social implicationsThe finding of this study adds to the knowledge of identifying and dealing with toxic behaviours in the workplace.Originality/valueThe longitudinal nature of the study provides a unique insight into the behaviours and damage of a dysfunctional leader within the workplace.