bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ring gyroscope sensitive element based on nanoporous alumina
Authors: Gorokh Gennady , Belahurau Yauhen , Zakhlebayeva Anna , Taratyn Igor , Khatko Viatcheslav 
Published: November 2017

Purpose
This paper aims to present new technological approaches of manufacturing of micromechanical gyroscope ring-sensitive element based on the nanoporous anodic alumina instead of traditional silicon technology. Simulation and the operation analyses of such elements have been performed.

Design/methodology/approach
The design of gyroscope represents a sensitive element on a glass substrate; in the center of a ring, there is a permanent magnet in a steel box. The sensitive element is made of profiled nanoporous anodic alumina consisting of an octagonal frame which is connected to a ring in the center with eight N-shaped spokes. The technology of the sensitive element fabrication involves the electrochemical formation of nanoporous anodic alumina substrate given the thickness and porosity and its chemical etching on the element topology. The basic parameters and the operation principle of the nanoporous alumina-sensitive element have been defined by finite element simulation.

Findings
It is shown that the resonance frequencies of the sensitive element change as functions of the alumina porosity. The main parameters of the nanoporous alumina-sensitive element have been compared with parameters of a silicon-sensitive element. Calculations have shown that the mechanical deformations of the von Mises are approximately lower by two times in the nanoporous alumina-sensitive element.

Practical implications
High-precision angular rate measurement will be achieved by reducing mechanical and electrical noises practically to zero through careful designing of a ring magnetoelectric gyroscope

Originality/value
The ring resonator made of nanoporous anodic alumina will allow to increase the threshold of sensitivity and stability of micromechanical gyroscope characteristics owing to the high precision of geometric dimensions, the stability of the elastic properties and the quality factor.
Effect of J3 perturbation on satellite position in LEO
Authors: Qi Nai-ming , Sun Qilong , Yang Yong 
Published: November 2017

Purpose
The purpose of this paper is to study the effect of J3 perturbation of the Earth’s oblateness on satellite orbit compared with J2 perturbation.

Design/methodology/approach
Based on the parametric variation method in the time domain, considering more accurate Earth potential function by considering J3-perturbation effect, the perturbation equations about satellite’s six orbital elements (including semi-major axis, orbit inclination, right ascension of the ascending node, true anomaly, eccentricity and argument of perigee) has been deduced theoretically. The disturbance effects of J2 and J3 perturbations on the satellite orbit with different orbit inclinations have been studied numerically.

Findings
With the inclination increasing, the maximum of the semi-major axis increases weakly. The difference of inclination disturbed by the J2 and J3 perturbation is relative to orbit inclinations. J3 perturbation has weak effect on the right ascension and argument of perigee. The critical angle of the right ascension and argument of perigee which decides the precession direction is 90° and 63.43°, respectively. The disturbance effects of J2 and J3 perturbations on the argument of perigee, right ascension and eccentricity are weakened when the eccentricity increases, simultaneously, the difference of J2 and J3 perturbations on argument of perigee, right ascension and argument of perigee decreases with eccentricity increasing, respectively.

Practical implications
In the future, satellites need to orbit the Earth much more precisely for a long period. The J3 perturbation effect and the weight compared to J2 perturbation in LEO can provide a theoretical reference for researchers who want to improve the control accuracy of satellite. On the other hand, the theoretical analysis and simulation results can help people to design the satellite orbit to avoid or diminish the disturbance effect of the Earth’s oblateness.

Originality/value
The J3 perturbation equations of satellite orbit elements are deduced theoretically by using parametric variation method in this paper. Additionally, the comparison studies of J2 perturbation and J3 perturbation of the Earth’s oblateness on the satellite orbit with different initial conditions are presented.
Computational modeling of the flow in a wind tunnel
Authors: Khalid Mahmood , Juhany Khalid A. , Hafez Salah 
Published: November 2017

Purpose
The purpose of this paper is to use a computational technique to simulate the flow in a two-dimensional (2D) wind tunnel where the effect of the solid walls facing the model has been addressed using a porous geometry so that interference arriving at the solid walls are duly damped and a flow suction procedure has been adopted at the side wall to minimize the span-wise effect of the growing side wall boundary layer.

Design/methodology/approach
A CFD procedure based on discretization of the Navier–Stokes equations has been used to model the flow in a rectangular volume with appropriate treatment for solid walls of the confined volume in which the model is placed. The rectangular volume was configured by stacking O-Grid sections in a span-wise direction using geometric growth from the wall. A porous wall condition has been adapted to counter the wall interference signatures and a separate suction procedure has been implemented for reducing the side wall boundary layer effects.

Findings
It has been shown that through such corrective measures, the flow in a wind tunnel can be adequately simulated using computational modeling. Computed results were compared against experimental measurements obtained from IAR (Institute for Aerospace, Canada) and NAL (National Aeronautical Laboratory, Japan) to show that indeed appropriate corrective means may be adapted to reduce the interference effects.

Research limitations/implications
The solutions seemed to converge a lot better using relatively coarser grids which placed the shock locations closer to the experimental values. The finer grids were more stiff to converge and resulted in reversed flow with the two equation k-w model in the region where the intention was to draw out the fluid to thin down the boundary layer. The one equation Spalart–Allmaras model gave better result when porosity and wall suction routines were implemented.

Practical implications
This method could be used by industry to point check the results against certain demanding flow conditions and then used for more routine parametric studies at other conditions. The method would prove to be efficient and economical during early design stages of a configuration.

Originality/value
The method makes use of an O-grid to represent the confined test section and its dual treatment of wall interference and blockage effects through simultaneous application of porosity and boundary layer suction is believed to be quite original.
Orbital perturbation due to orbit-attitude coupling near asteroids
Authors: Wang Yue , Zhong Rui , Xu Shijie 
Published: November 2017

Purpose
The purpose of this paper is to assess the orbital perturbation caused by the gravitational orbit–attitude coupling of spacecraft in the proximity of asteroids.

Design/methodology/approach
The gravitational orbit–attitude coupling perturbation (GOACP), which has been neglected before in the close-proximity orbital dynamics about asteroids, is investigated and compared with other orbital perturbations. The GOACP has its origin in the fact that the gravity acting on a non-spherical extended body is actually different from that acting on a point mass located at the body’s center of mass, which is the approximated model in the orbital dynamics. Besides, a case study of a tethered satellite system is given by numerical simulations.

Findings
It is found that the ratio of GOACP to the asteroid’s non-spherical gravity is the order of ρ/ae, where ρ is the spacecraft’s characteristic dimension and ae is the asteroid’s mean radius. It can also be seen that as ρ increases, GOACP will also increase but the solar radiation pressure (SRP) will decrease due to the decreasing area-to-mass ratio. The GOACP will be more significant than SRP at small orbital radii for a large-sized spacecraft. Based on the results by analyses and simulations, it can be concluded that GOACP needs to be considered in the orbital dynamics for a large-sized spacecraft in the proximity of a small asteroid.

Practical implications
This study is of great importance for the future asteroids missions for scientific explorations and near-Earth objects mitigation.

Originality/value
The GOACP, which has been neglected before, is revealed and studied.
Backstepping sliding mode control for formation flying spacecraft
Authors: Guo Yong , Song Shen-Min , Li Xue-Hui 
Published: November 2017

Purpose
This paper aims to investigate the problem of finite-time consensus tracking control without unwinding for formation flying spacecraft in the presence of external disturbances.

Design/methodology/approach
Two distributed finite-time controllers are developed using the backstepping sliding mode. The first robust controller can compensate for external disturbances with known bounds, and the second one can compensate for external disturbances with unknown bounds.

Findings
Because the controllers are designed on the basis of rotation matrix, which represents the set of attitudes both globally and uniquely, the system can overcome the drawback of unwinding, which results in extra fuel consumption. Through introducing a novel virtual angular velocity, exchange of control signals between neighboring spacecraft becomes unnecessary, and it is able to reduce the communication burden.

Practical implications
The two robust controllers can deal with unwinding that may result in fuel consumption by traveling a long distance before returning to a desired attitude when the closed-loop system is close to the desired attitude equilibrium.

Originality/value
Two finite-time controllers without unwinding are proposed for formation flying spacecraft by using backstepping sliding mode. Furthermore, exchange of control signals between neighboring spacecraft is unnecessary.
Five-axis milling of sculptured surfaces of the turbine blade
Authors: Gdula Michal , Burek Jan , Zylka Lukasz , Plodzien Marcin 
Published: November 2017

PurposeThe purpose of this paper is to determine the influence of a toroidal cutter axis orientation and a variable radius of curvature of the machined contour of sculptured surface on the five-axes milling process. Simulation and experimental research performed in this work are aimed to determine the relationship between the parameters of five-axes milling process and the shape and dimensional accuracy of curved outline of Inconel 718 alloy workpiece.Design/methodology/approachA subject of research are sculptured surfaces of the turbine blade. Simulation research was performed using the method of direct mapping tools in the CAD environment. The machining research was carried out with the use of multi-axis machining center DMU 100 monoBLOCK DMG, equipped with rotating dynamometer to measure the components of the cutting force. To control the shape and dimensional accuracy, the coordinate measuring machine ZEISS ACCURA II was used.FindingsIn this paper, the effect of the toroidal cutter axis orientation and the variable radius of curvature of the machined contour on the parameters of five-axes milling process and the accuracy of the sculptured surfaces was determined.Practical implicationsFive-axes milling with the use of a toroidal cutter is found in the aviation industry, where sculptured surfaces of the turbine blades are machined. The results of the research allow more precise planning of five-axes milling and increase of the turbine blades accuracy.Originality/valueThis paper significantly complements the current state of knowledge in the field of five-axes milling of turbine blades in terms of their accuracy.
Building affective commitment in a financial institution through an ambidexterity context
Authors: Cegarra-Navarro Juan-Gabriel , Jiménez-Jiménez Daniel , García-Pérez Alexeis , Del Giudice Manlio 
Published: November 2017

PurposeAmbidexterity refers to the tension between two different business models within the same organisation. This paper examines the significance of individuals’ knowledge exploration and exploitation activities in an organisation’s ambidexterity context, along with how they affect the creation of an affective commitment in the workforce. The study then investigates how an organisation’s ambidexterity vision contributes to employees’ affective commitment to learning.Design/methodology/approachThese relationships are examined through an empirical investigation of 219 employees in the financial sector, using structural equation modelling validated by factor analysis.FindingsThe results indicate that for a firm to successfully achieve ambidexterity, its managers need to explicitly work to nurture a context where explorative and exploitative activities take place simultaneously. Another relevant contribution of this study has been addressing the impact that explorative and exploitative activities may have on affective commitment. The results suggest that while the effect of the ambidexterity context on the affective commitment by way of explorative activities is statistically insignificant, the effects of exploitative activities on affective commitment are statistically significant.Originality/valueWhile the extant literature provides useful insights into the relationship between contextual ambidexterity and organisational performance, the relationship between ambidexterity and affective commitment has been less researched. This study has shown that an ambidexterity context is a key component in the process of combining knowledge structures in ways which are appropriate for both exploring value of that knowledge for the company and being effective in exploiting its memory.
Work-integrated learning and the importance of peer support and sense of belonging
Authors: McBeath Margaret , Drysdale Maureen T.B. , Bohn Nicholas 
Published: November 2017

Purpose
The purpose of this paper is to explore the relationship between peer support and sense of belonging on the mental health and overall well-being, with a specific focus on comparing the perceptions of students in a work-integrated learning (WIL) program to those in a traditional non-WIL program.

Design/methodology/approach
Semi-structured group interviews were conducted with 25 participants, selected from a university with a WIL program. Interview data captured perceptions of peer support, sense of belonging, and how these influenced mental health, overall well-being, and confidence in making school-to-work transitions. Analysis followed the grounded theory approach of Glaser.

Findings
The analysis revealed that peer support and sense of belonging were essential protective factors for university student’s mental health and well-being, particularly during off-campus work terms or when transitioning to the labor market after graduation. Data suggested that participating in a WIL program can exacerbate students’ perceived barriers to accessing peer support resources and, in turn, lead to poor mental health.

Originality/value
The findings provide evidence for the importance of peer support and sense of belonging on mental health and help-seeking behaviors. Findings are important for the development of health programs, initiatives, and policies, particularly in light of the increase in mental illness amongst university students during their studies and as they prepare for the competitive labor market after graduation.
Analysing public sector continuous improvement: a systems approach
Authors: Elias Arun A. , Davis Dona 
Published: November 2017

Purpose
The purpose of this paper is to analyse the complexities involved in implementing continuous improvement (CI) initiatives in public sector organisations.

Design/methodology/approach
This paper is based on a case study of a private sector organisation based in New Zealand and its efforts in implementing CI activities in its public sector clients. In total, 12 semi-structured interviews were followed by group model building exercises based on system dynamics that led to the development of a systems model.

Findings
CI initiatives using public-private partnerships were successful in steadily improving the operational excellence and end-user satisfaction in this case. But client satisfaction was only increasing at a much slower rate. The underlying structure responsible for this behaviour was captured using a causal loop model and explained using seven interacting feedback loops.

Research limitations/implications
The major limitation of this research is that it is confined to one private sector organisation and its public sector clients. Thus, the generalisability cannot be utilised for future reference.

Practical implications
This paper illustrates the development of strategic initiatives based on a participative model building approach. It provides a practical method for initiating long-term structural changes while managing CI activities in public sector organisations.

Originality/value
This paper contributes a New Zealand case of public-private partnerships for implementing CI initiatives. It illustrates a systems approach to analyse the complexities involved in implementing CI initiatives in public sector organisations.
How to measure post-purchase customer experience in online retailing? A scale development study
Authors: Kumar Amresh , Anjaly Bhawna 
Published: November 2017

Purpose
The advent of e-retailing has created multiple options for customers. Hence, most important concern is to identify the experience which entices customers for repurchase from the one particular e-retailer. This paper tries to identify the customer experience with reference to activities happening post-purchase. The purpose of this paper is to develop and validate online post-purchase customer experience (OPPCE).

Design/methodology/approach
The methodology of this scale development study starts with skimming of relevant literature to identify the knowledge gap and prepare a theoretical background for the study. Then scientific method is applied for scale creation. First, items of the scale been identified through interviews of online shoppers and marketing experts. Then the major dimensions were identified through exploratory factor analysis applied on the data collected from active shoppers, who transacted online in last six months, with the help of a structured questionnaire survey. These data are analyzed through structural equation modeling to validate the scale.

Findings
The study yields that the scale for measuring OPPCE is multi-dimensional. It has six dimensions, i.e. delivery, product-in-hand, return and exchange, customer support, benefits and feel-good factors. The proper focus on the items of these dimensions can help e-retailers improve customer experience and increase repeat purchase.

Originality/value
Post-purchase activities have a significant impact on customer and their repeat purchase intensions. But it has not received its due attention particularly in the online context. Hence, this paper fills this knowledge gap and gives e-retailers a tool to enhance their customers’ experience.
Exploring consumer support for CSR from the perspective of moral legitimacy
Authors: Abdulrazak Sham , Amran Azlan 
Published: November 2017

Purpose
The primary purpose of this paper is to explore and interpret the perceptions of Malaysian consumers regarding the factors that facilitate their market support for corporate social responsibility (CSR) through the lens of moral legitimacy.

Design/methodology/approach
This paper interprets qualitative data gathered from in-depth interviews with Malaysian consumers. The findings are then mapped to four forms of evaluations for moral legitimacy identified in the literature, towards establishing a conceptual model of consumer support for CSR.

Findings
Overall, six factors were identified as facilitating consumer market support for CSR. Of these, consumers were found to perceive strategic alignment between a firm’s business and its CSR as the most fundamental. In the absence of which, all other considerations are rendered irrelevant. Upon the requirement for alignment being met, the consumers then place emphasis on the manner by which a CSR activity is executed, for deciding whether to support or otherwise.

Practical implications
In contrast to previous reports in the literature concerning Malaysian consumers and CSR, the findings suggest that Malaysian consumers now have increased levels of awareness and maturity with regard to CSR, not unlike that of consumers in the West. Therefore, Malaysian firms will have to stop treating their CSR activities as an add-on, as has been reported previously, and they should endeavour to integrate their CSR into their overall business strategy.

Originality value
This paper offers an important insight about the consumers’ market support for CSR in the context of a developing nation.
Transmitting competencies at universities in Kazakhstan: intellectual capital of teachers
Authors: Sultanova Gulbakhyt , Svyatov Serik , Ussenbayev Nurzhan 
Published: November 2017

PurposeThe purpose of this paper is to measure individual intellectual capital (IC) of academic staff as well as to test its impact on the employability readiness of future graduates and the reduction of the discrepancy between competencies developed and grades obtained with the help of two indicators, i.e. intellectual capital indicator (ICI) and employability readiness indicator (ERI). While ICI measures the level of a teacher’s competencies to be transmitted in the education process, ERI measures the level of a student’s competencies developed after completing relevant courses.Design/methodology/approachThis is an empirical research carried out in the form of a case study. Regression model is applied to find the influence of ICI on ERI. The minimisation problem is set with relevant constraints to decrease the discrepancy between ERI and traditional grade point average (GPA).FindingsThe data were collected at one Kazakh university and from experts from academia and industry by means of documentary analysis, specialised tests and structured interviews. The direct impact of ICI on ERI is confirmed and the optimal level of ICI that permits an effective decrease in the discrepancy between ERI and GPA is identified.Research limitations/implicationsA longitudinal study covering more programmes is necessary to draw conclusions concerning causality. The application of ICI as a university’s management tool is shown.Originality/valueThe novelty of this study lies in providing a consistent and simple approach for calculating a teacher’s IC and its impact on a student’s employability readiness.