bluuebunny/crossref_metadata_2025_split huggingface dataset:
Aerodynamics analysis of rotor’s impact on the aircraft in the tandem wing configuration
Authors: Figat Marcin 
Published: October 2018

Purpose
This paper aims to present the results of aerodynamic calculation of the aircraft in tandem wing configuration called VTOL. A presented vehicle combines the capabilities of the classic aircraft and helicopters. The aircraft is equipped with two pairs of tilt-rotors mounted on the tips of the front and the rear wing. The main goal of the presented research was to find the aerodynamic impact of both pairs of tilt-rotors on aerodynamic coefficients of the aircraft. Moreover, the rotors impact on the static stability of the aircraft was investigated too.

Design/methodology/approach
The CFD analysis was made for the complete aircraft in the tandem wing configuration. The computation was performed for the model of aircraft which was equipped with the four sub-models of the front and rear rotors. They were modeled as the actuator discs. This method allows for computing the aerodynamic impact of rotating components on the aircraft body. All aerodynamic analysis was made by the MGAERO software. The numerical code of the software was based on the Euler flow model. The used numerical method allows for the quick computation of very complex model of aircraft with a satisfied accuracy.

Findings
The result obtained by computation includes the aerodynamic coefficients which described the impact of the tilt rotors on the aircraft aerodynamic. The influence of the angle of attack, sideslip angle and the change of rotor tilt angle was investigated. Evaluation of the influence was made by the stability margin analysis and the selected stability derivatives computation.

Practical implications
Presented results could be very useful in the computation of dynamic stability of unconventional aircraft. Moreover, results could be helpful during designing the aircraft in the tandem wing configuration.

Originality/value
This paper presents the aerodynamic analysis of the unconventional configuration of the aircraft which combines the tandem wing feature with the tilt-rotor advantages. The impact of disturbance generated by the front and rear rotors on the flow around the aircraft was investigated. Moreover, the impact of rotors configuration on the aircraft static stability was found too.
Development of a testing methodology for high-altitude propeller
Authors: Jiao Jun , Song Bifeng , Li Yubin , Zhang Yugang , Xu Jianhua 
Published: October 2018

Purpose
The purpose of this paper is to develop a propeller performance measurement method for high-altitude platforms by analyzing of the propeller aerodynamic characteristics and application of a mobile testing system.

Design/methodology/approach
An experimental approach is adopted for this study. Considering the aerodynamic characteristics of the high-altitude propeller, the similitude of the scaled propeller model in the experiment is analyzed and determined. Then, the experimental method and procedure to obtain the propeller’s performance under different altitudes are presented, and the structure of hardware and software and the key techniques of the testing system are introduced in detail.

Findings
The applicability and effectiveness of the testing system is verified through comparison between experimental and numerical results. In addition, the performance of the 6.8-m propeller for a high-altitude airship is tested, which proves that the high-altitude propeller can meet the requirements of the propulsion system.

Practical implications
The testing methodology and the mobile testing system could be applied to aerodynamic performance evaluation of the high-altitude propellers under different altitudes.

Originality/value
This testing approach exhibits significant time and cost benefits over many other experimental methods to obtain the performance of the high-altitude propellers, which is important in the preliminary design of the propulsion system for high-altitude platforms.
Combustion characteristics of a two-stroke spark ignition UAV engine fuelled with gasoline and kerosene (RP-3)
Authors: Liu Rui , Su Xiaoping , Miao Xiaodong , Yang Guang , Dong Xuefei , Liang Yongsheng , Huang Taiqi 
Published: October 2018

Purpose
The purpose of this paper is to compare the combustion characteristics, including the combustion pressure, heat release rate (HRR), coefficient of variation (COV) of indicated mean effective pressure (IMEP), flame development period and combustion duration, of aviation kerosene fuel, namely, rocket propellant 3 (RP-3), and gasoline on a two-stoke spark ignition engine.

Design/methodology/approach
This paper is an experimental investigation using a bench test to reflect the combustion performance of two-stroke spark ignition unmanned aerial vehicle (UAV) engine on gasoline and RP-3 fuel.

Findings
Under low load conditions, the combustion performance and HRR of burning RP-3 fuel were shown to be worse than those of gasoline. Under high load conditions, the average IMEP and the COV of IMEP of burning RP-3 fuel were close to those of gasoline. The difference in the flame development period between gasoline and RP-3 fuel was similar.

Practical implications
Gasoline fuel has a low flash point, high-saturated vapour pressure and relatively high volatility and is a potential hazard near a naked flame at room temperature, which can create significant security risks for its storage, transport and use. Adopting a low volatility single RP-3 fuel of covering all vehicles and equipment to minimize the number of different devices with the use of a various fuels and improve the application safeties.

Originality/value
Most two-stroke spark ignition UAV engines continue to combust gasoline. A kerosene-based fuel operation can be applied to achieve a single-fuel policy.
A vision-based method for supporting autonomous aircraft landing
Authors: Oszust Mariusz , Kapuscinski Tomasz , Warchol Dawid , Wysocki Marian , Rogalski Tomasz , Pieniazek Jacek , Kopecki Grzegorz Henryk , Ciecinski Piotr , Rzucidlo Pawel 
Published: October 2018

PurposeThis paper aims to present a vision-based method for determination of the position of a fixed-wing aircraft that is approaching a runway.Design methodology/approachThe method determines the location of an aircraft based on positions of precision approach path indicator lights and approach light system with sequenced flashing lights in the image captured by an on-board camera.FindingsAs the relation of the lighting systems to the touchdown area on the considered runway is known in advance, the detected lights, seen as glowing lines or highlighted areas, in the image can be mapped onto the real-world coordinates and then used to estimate the position of the aircraft. Furthermore, the colours of lights are detected and can be used as auxiliary information.Practical implicationsThe presented method can be considered as a potential source of flight data for autonomous approach and for augmentation of manual approach.Originality/valueIn this paper, a feasibility study of this concept is presented and primarily validated.
The diversity of monographs: changing landscape of book evaluation in Poland
Authors: Kulczycki Emanuel 
Published: October 2018

Purpose
The purpose of this paper is to determine the characteristic patterns of monographs in the humanities, social sciences and hard sciences published by Polish scholars. The study provides a comprehensive overview of the Polish book evaluation system to explain how monographs are assessed and illustrate how changes in the definitions of the types of scholarly book publications influence publication patterns.

Design/methodology/approach
This paper analyses bibliographic records of 42,307 monographs published by Polish scholars in the humanities and science fields from 2009 to 2016. Through a bibliometric analysis, the paper investigates the characteristic patterns of the monographs, including authorship, publication language and length, across three fields.

Findings
The present study demonstrates that changes in the definitions of scholarly book publications in Poland have significantly influenced the characteristic patterns of monographs. The analysis of the characteristic patterns across three fields reveals that the monographs are different in terms of all characteristics. In the entire period, 85.3 percent monographs were written in Polish, 10.1 percent in English, 1.4 percent in German, 1.1 percent in Russian and 2.1 percent in 39 other languages. The most significant changes are observed in authorship patterns.

Originality/value
This work offers empirical findings on the characteristic patterns of monographs in the humanities, social sciences and hard sciences from a non-English speaking country. It discusses a unique model of book assessment and shows certain consequences of various overly formalized procedures of evaluation. Thus, the study identifies the major challenges and implications of using highly formalized procedures for book evaluation.
Mixed language queries in online searches
Authors: Fu Hengyi 
Published: October 2018

PurposeWith the increasing number of online multilingual resources, cross-language information retrieval (CLIR) has drawn much attention from the information retrieval (IR) research community. However, few studies have examined how and why multilingual searchers seek information in two or more languages, specifically how they switch and mix language in queries to get satisfying results. The purpose of this paper is to focus on Chinese–English bilinguals’ intra-sentential code-switching behaviors in online searches. The scenarios and reasons of code-switching, factors that may affect code-switching, the patterns of mixed language query formulation and reformulation and how current IR systems and other search tools can facilitate such information needs were examined.Design/methodology/approachIn-depth semi-structured interviews were used as the research method. In total, 30 participants were recruited based on their English proficiency, location and profession, using a purposive sampling method.FindingsFour scenarios and four reasons for using Chinese–English mixed language queries to cover information needs were identified, and results suggest that linguistic and cultural/social factors are of equivalent importance in code-switching behaviors. English terms and Chinese terms in queries play different roles in searches, and mixed language queries are irreplaceable by either single language queries or other search facilitating features. Findings also suggest current search engines and tools need greater emphasis in the user interface and more user education is required.Originality/valueThis study presents a qualitative analysis of bilinguals’ code-switching behaviors in online searches. Findings are expected to advance the theoretical understanding of bilingual users’ search strategies and interactions with IR systems, and provide insights for designing more effective IR systems and tools to discover multilingual online resources, including cross-language controlled vocabularies, personalized CLIR tools and mixed language query assistants.
Website removal from search engines due to copyright violation
Authors: Strzelecki Artur 
Published: October 2018

Purpose
The purpose of this paper is to clarify how many removal requests are made, how often, and who makes these requests, as well as which websites are reported to search engines so they can be removed from the search results.

Design/methodology/approach
Undertakes a deep analysis of more than 3.2bn removed pages from Google’s search results requested by reporting organizations from 2011 to 2018 and over 460m removed pages from Bing’s search results requested by reporting organizations from 2015 to 2017. The paper focuses on pages that belong to the .pl country coded top-level domain (ccTLD).

Findings
Although the number of requests to remove data from search results has been growing year on year, fewer URLs have been reported in recent years. Some of the requests are, however, unjustified and are rejected by teams representing the search engines. In terms of reporting copyright violations, one company in particular stands out (AudioLock.Net), accounting for 28.1 percent of all reports sent to Google (the top ten companies combined were responsible for 61.3 percent of the total number of reports).

Research limitations/implications
As not every request can be published, the study is based only what is publicly available. Also, the data assigned to Poland is only based on the ccTLD domain name (.pl); other domain extensions for Polish internet users were not considered.

Originality/value
This is first global analysis of data from transparency reports published by search engine companies as prior research has been based on specific notices.
The learnability of the dimensional view of data and what to do with it
Authors: Vujošević Dušan , Kovačević Ivana , Vujošević-Janičić Milena 
Published: October 2018

Purpose
The purpose of this paper is to examine the usability of the dimensional view of data in the context of its presumed learnability.

Design/methodology/approach
In total, 303 participants were asked to solve 12 analytical problems in an experiment using the dimensional view of data for half of the problems and an operational view of data for the other half. Inferential statistics and structural equation modeling were performed with participants’ objective results and affective reactions.

Findings
Showing that the order of exposure to the two views of data impacts the overall usability of ad hoc querying, the study provided evidence for the learnability potential of the dimensional view of data. Furthermore, the study showed that affective reactions to the different views of data follow objective usability parameters in a way that can be explained using models from affective computing research.

Practical implications
The paper proposes a list of guidelines for use of the dimensional view of data in business analytics.

Originality/value
This study is the first to confirm the learnability of the dimensional view of data and the first to take a deeper look at affective reactions to an ad hoc business analytics solution. Also, it is one of few studies that examined the usability of different views of data directly on these views, rather than using paper representations of data models.
Port wine value chain: from the Douro Valley to Oporto Cellars
Authors: Ferreira João Pedro , Ramos Pedro Nogueira , Cruz Luís , Barata Eduardo , Lahr Michael 
Published: October 2018

Purpose
The purpose of this paper is to offer an insight into the fundamental changes taking place in Port wine production value chains. Specifically, the authors examine two distinct production regimes: when Port is aged and sold in the Greater Oporto and, alternatively, when it is produced, aged and sold in Douro.

Design/methodology/approach
The authors apply a tri-regional input–output model (Douro, Greater Oporto and rest of the country) for Portugal’s economy. This framework comprises a significant level of detail, with 431 products and 136 industries, the corresponding supply and demand for the products, by industry (for intermediate consumption) and final demand.

Findings
This study shows that the two regimes generate noteworthy, but quite heterogeneous, regional impacts. In both cases, the distribution of value added generates international and interregional trade flows. Moreover, the study reveals a greater capacity to capture national value added by getting the supply chain more intensive in localised services and by using state-of-the-art production techniques.

Originality/value
Using detailed regional data, the authors use disaggregated information, both for industries as well for territories, overcoming a common limitation in similar works that are grounded in international databases. Additionally, the approach integrates the trade interactions among industries and regions, which proves essential to uncovering spillovers resulting from the (direct and indirect) use of inputs from other regions and other countries.
Linked models and theories: a tool for school nutrition policies deployment
Authors: Hamadeh Sima , Marquis Marie 
Published: October 2018

Purpose
The purpose of this paper is to explore the pertinence of using an integrated conceptual framework based on several theories and models to guide interviews with adults and youth as a prelude to school nutrition policy (SNP) deployment.

Design/methodology/approach
Appropriate socio-behavioral and communication theories and models within a social marketing approach were used to build the integrated conceptual framework of this study. The target population consists of 115 multidisciplinary key stakeholders in Lebanon. Directed and semi-structured individual interviews and focus groups were conducted by using questionnaires associated with the variables of the framework. Collected data have been submitted to a thematic qualitative analysis.

Findings
Combining theories and models increases the potential for understanding the broader determinants of SNP deployment. It is important to choose a holistic theoretical perspective: to study key stakeholders’ perceptions of the facilitators and barriers of SNP development and implementation, to emphasize the active participation of communities and to guide the work of policy and decision makers.

Practical implications
This research offers perspectives on determinants factors envisaged in the deployment of SNP that help key stakeholders in their promotion and communication practices.

Social implications
For public policy makers, this research suggests a need to address communities perceptions’ of an eventual SNP deployment.

Originality/value
The comprehensive integrated conceptual framework proposed in this study amalgamates several variables involved in the process of health promotion under various categories to facilitate SNP deployment.
A BIM approach for construction safety: applications, barriers and solutions
Authors: Marefat Akbar , Toosi Hossein , Mahmoudi Hasankhanlo Reza 
Published: October 2018

Purpose
Construction industry bears a lot of casualties and accidents more than other high-risk industries annually. Thus, the use of new technologies such, as building information modeling, automatic rule checking, information technology-based safety systems in order to implement the rules and safety standards, better controls the performance of workers on site and make high coordination between operational executives, leading to create a secure environment in projects by reducing accidents. The paper aims to discuss these issues.

Design/methodology/approach
In this study, a researcher-designed questionnaire was distributed among 200 companies that are active in the field of construction to evaluate the effect of building information model (BIM) for safety projects and barriers to adoption. Only 70 percent of questionnaires were returned. Statistical Package for the Social Sciences analysis has been used to determine the correlation coefficient among the respondents.

Findings
The results show the factors that lead to failure in the adoption of BIM in Iran are lack of well-trained personnel, proper social infrastructure, guidance and governmental supports.

Originality/value
Finally, the authors presented solutions for overcoming barriers and proposed some factors leading to the successful adoption of BIM in Iran.
HRD competencies: analysis of employer expectations from online job postings
Authors: Hirudayaraj Malar , Baker Rose 
Published: October 2018

Purpose
The purpose of this paper is to inform the preparation of HRD professionals by providing an empirical analysis of the knowledge, skills, and responsibilities employers expect in the workplace.

Design/methodology/approach
This study reports a qualitative content analysis of online HRD job postings.

Findings
Results of this content analysis indicated that the most recent employer expectations for HRD practitioners as reflected in HRD-related job postings for knowledge and responsibilities were instructional design, training delivery, learning management systems, and learning technologies. The outcomes reinforced that employers specifically expect education technology-based knowledge and skills.

Research limitations/implications
The job postings included in the study were all collected from one source, the Association for Talent Development job site.

Practical implications
Educational programs can use these findings to inform curricular decisions related to knowledge and skills to be taught and practiced during the preparation of L&D practitioners and HRD professionals.

Originality/value
This paper analyzes online HRD job postings to understand what knowledge and skills employers expected from L&D practitioners and HRD professionals.
Differentiating knowledge transfer and technology transfer
Authors: Ismail Maimunah , Hamzah Siti Raba’ah , Bebenroth Ralf 
Published: October 2018

Purpose
The purpose of this paper is to examine the conceptualization of knowledge transfer and technology transfer to seek answers to the question: Why should an organizational manager need to know the difference between knowledge transfer (KT) and technology transfer (TT)?

Design/methodology/approach
An extensive literature review method was used to identify and analyze relevant international publications. The literature sources are categorized as follows: literature on KT only, literature on TT only and literature on comparative analysis on KT and TT. The conceptualization of KT and TT is based on signaling theory.

Findings
The authors identified differences between KT and TT based on six dimensions, namely knowledge versus technology characteristics, usage of KT and TT in national development, sender versus receiver, intra-firm versus inter-firm transfer, foreign direct investment (FDI) and workers’ mobility.

Research limitations/implications
This is a conceptual analysis that should contribute to the existing literature by comprehensively reviewing the processes of KT and TT based on selected research conducted worldwide as well as suggest practical guidelines to organizational managers in managing KT and TT.

Originality/value
This review could shed new insights for future researchers to validate and examine the identified differences between KT and TT so that managers could make use of the findings to manage KT and TT successfully in their organizations.
Continuous innovation in the hotel industry
Authors: Úbeda-García Mercedes , Claver-Cortés Enrique , Marco-Lajara Bartolomé , García-Lillo Francisco , Zaragoza-Sáez Patrocinio Carmen 
Published: October 2018

PurposeThe purpose of this paper is to explore whether the use of high-performance work systems (HPWSs) facilitates the development of organizational ambidexterity directly or through a mediating variable such as ambidextrous organizational culture.Design/methodology/approachThe theoretical model and the hypotheses proposed were tested using a sample of 100 Spanish hotels. The data analysis method used was the partial least squares.FindingsThe results of the research confirm that HPWSs exert a direct influence on organizational ambidexterity. HPWSs shape and integrate exploitative and exploratory activities through the construction of a culture that promotes organizational diversity and shared vision, which are needed to shape a suitable context for ambidexterity. Therefore, ambidextrous organizational culture emerges as a mediating variable between HPWSs and organizational ambidexterity. Finally, the ambidexterity of hotels has a positive impact on their performance.Originality/valueThe present paper presents new alternatives when undertaking research on organizational ambidexterity. More specifically, this research incorporates a mediator variable called ambidextrous organizational culture between HPWSs and organizational ambidexterity, which has not been considered before.