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This study aims to clarify the influence mechanism of polishing solution type on the glazing evolution of fixed abrasive pad under different interfacial pressure conditions.

The tribological experiments were carried out on the friction and wear machinery with W3-5 diamond fixed abrasive pad and quartz glass workpiece under three polishing solution types of five pressure conditions. The changes of surface morphology, porosity and hardness of fixed abrasive pad were detected by white light interferometer, optical microscope and shore hardness tester.

The results showed that the glazed phenomenon of fixed abrasive pad is occurred after a certain time, which is more obvious with the increasing of interfacial pressures. The polishing solution type has a significant effect on the glazing time, although the glazed phenomenon is inevitable. The mechanism of it is that the micro-convex peaks on the surface of the fixed abrasive pad are easily wear, and the pores are blocked by the accumulation of waste debris generated during the experiment process. Thus, a smooth and high-density hard layer is formed on the surface of the fixed abrasive pad which induces the decreasing of the friction coefficient and surface roughness value. For selected polishing solution types, the wear rate of micro-convex peaks is different due to the corrosion action difference with polishing pad surface.

The main contribution of this work is to provide a new investigating method for further understanding the glazing evolution mechanism of fixed abrasive pad.

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-08-2023-0257/

This paper aims to clarify the fluid infiltration mechanism at the micro-contact zone boundary of rubber-glass interfaces.

An in situ observation instrument was putted up; then the fluid infiltration process was recorded. Experimental results indicated that the fluid infiltration was more likely to occur in a high-contact-area-ratio zone, and the path order of fluid infiltration was first inner normal to the boundary of micro-contact area, and then along the boundary, at last external normal to the direction of boundary.

By analysis, capillary pressure is the driven force of fluid at interfaces. The micro-channel size at higher-contact-area-ratio zone is smaller, and the capillary pressure is bigger. Moreover, along different section directions of wedge-shaped region, the horizontal driving force of fluid is different due to difference of conical angle.

The main contribution of this study is proposing a new wedge-shaped model for better understanding the phenomena of fluid infiltration at rubber contact interfaces.

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-10-2019-0453

Hedonic value is commonly conceded as a determinant of behavioral intentions toward location-based advertising (LBA). However, the careful consideration of a mechanism behind hedonic motivation and its subsequent impact on continuance intention is inadequate. This study aims to explore the formation of hedonic value and its motivation for prolonged usage toward LBA.

A sample of 486 mobile users was recruited to evaluate the research model using structural equation modeling (SEM).

Results reveal that perceived utility and promotional offers are the strongest indicators of hedonic value. Moreover, social support and contextual convenience play an essential role in heightening hedonic value. Furthermore, the research lenses attempt to clarify the direct, indirect influences of hedonic value, irritation and perceived credibility on continuance intention.

The findings offer practitioners an understanding of how to improve hedonic value and continuance intention and develop effective LBA strategies in emerging markets.

This study narrows the gap of current literature by formulating a hedonic value-based continuance intention model based on uses and gratifications theory (UGT). Additionally, this work illuminates the insights into hedonic value toward LBA by identifying its motivations, including perceived utility, promotional offers, social support and contextual convenience.

The purpose of this paper is to examine a proposed model of location-based advertising (LBA) effectiveness upon the influence of integrative perceived values on consumers' attitude and behavioral responses in the immaturity of LBA in Vietnam.

A survey research method was utilized to collect data from mobile users. A real sample of 459 respondents was deemed and the Structural Equation Modeling (SEM) was applied to analyze data.

The results unveil that contextual offers, social facilitation, and advertising values have significantly positive effects on attitude; in turn, attitude mediates between these factors and purchase intention, information seeking and recommendation behaviors. Moreover, social facilitation is a significant stimulator of purchase intention. Otherwise, perceived encroached risk negatively impacts attitude.

Marketers should capture considerable attention to mobile natives' conscious awareness about a mechanism of tailoring their enthusiasm and behavioral responses at the embryonic stage of LBA growth in emerging countries like Vietnam.

This study fills the gap in the current literature by simultaneously exploring the importance of integrative perceived values to construct a hypothetical framework of consumers' responses and performance based on the uses and gratifications theory, inclusive perceived behavioral control derived from theory of planned behavior, associated with contextual value from the nature of LBA.

The paper aims at identifying the role of online advertising on the purchase intention (PI) of smartphones of Bangladeshi customers. The independent variable (online advertising) has been divided into five dimensional segregations: informativeness (INFO), irritation (IRR), entertainment (ENT), incentives (INC) and credibility (CRD). For increasing the value of investigation to further extent, the authors included two mediators termed as flow experience (FE) and advertising value (ADD).

The study has been conducted on primary data collected through a structured questionnaire received from a valid sample of 281 smartphone users selected on a random basis. SPSS (Version 24) has been used for descriptive statistical analysis, while structural equation modeling technique (utilizing AMOS 24) has been used to test the hypothetical relationships among the variables.

After a careful and bias-free statistical analysis, the results indicate that purchase intention is positively and significantly affected by all the independent components INFO, IRR, ENT, INC and CRD. Regarding the mediating effect, FE can partially mediate the relationships between IRR and PI and ENT and PI as both the direct and indirect effects are significant. On the other hand, ADD can partially mediate the relationships between IRR and PI and INC and PI, respectively, since both the direct and indirect effects are significant.

This empirical study is expected to be beneficial for the academicians in finding some unique dimensional aspects regarding online advertising and purchase intentions.

The policymakers can formulate some unique online advertising policies with a view to identifying customer psychology and increase sales volume based on the findings.

Smartphone market in Bangladesh is growing steadily. This empirical paper has shed some lights on the unique role of online advertising on PI of smartphones of Bangladeshi customer base. Since the market scenario in Bangladesh is somewhat unique than those of Western and Eastern countries, the authors hope that the findings will add numerical theoretical and practical values for further investigation in South Asian markets.

Lapping is a vital flattening process to improve the quality of processed semiconductor wafers such as single-crystal sapphire wafers. This study aims to optimise the lapping process of the fixed-abrasive lapping plate of sapphire wafers with good overall performance [i.e. high material removal rate (MRR), small surface roughness (Ra) of the wafers after lapping and small lapping plate wear ratio (η)].

The influence of process parameters such as lapping time, abrasive size, abrasive concentration, lapping pressure and lapping speed on MRR, Ra and η of lapping-processed sapphire wafers was studied, and the results were combined with experimental data to establish a regression model. The multi-evaluation index optimisation problem was transformed into a single-index optimisation problem via an entropy method and the grey relational analysis (GRA) to comprehensively evaluate the performance of each parameter.

The results revealed that lapping time, abrasive size, abrasive concentration, lapping pressure and lapping speed had different influence degrees on MRR, Ra and η. Among these parameters, lapping time, lapping speed and abrasive size had the most significant effects on MRR, Ra and η, and the established regression equations predicted the response values of MRR, Ra and η to be 99.56%, 99.51% and 93.88% and the relative errors between the predicted and actual measured values were <12%, respectively. With increased lapping time, MRR, Ra and η gradually decreased. With increased abrasive size, MRR increased nearly linearly, whereas Ra and η initially decreased but subsequently increased. With an increase in abrasive concentration, MRR, Ra and η initially increased but subsequently decreased. With increased lapping pressure, MRR and η increased nearly linearly and continuously, whereas Ra decreased nearly linearly and continuously. With increased lapping speed, Ra initially decreased sharply but subsequently increased gradually, whereas η initially increased sharply but subsequently decreased gradually; however, the change in MRR was not significant. Comparing the optimised results obtained via the analysis of influence law, the parameters optimised via the entropy method and GRA were used to obtain sapphire wafers lapping with an MRR of 4.26 µm/min, Ra of 0.141 µm and η of 25.08, and the lapping effect was significantly improved.

Therefore, GRA can provide new ideas for ultra-precision processing and process optimisation of semiconductor materials such as sapphire wafers.

This study aims to examine the effects of in-game advertisement congruity, interactivity and intrusiveness on gamers’ attitude towards advertising and purchase intention towards advertised brands based on the stimulus-organism-response (SOR) model.

This study uses a structured online questionnaire to collect the data from 311 gamers aged between 18 and 35 years. This study examines mediation using bootstrapping.

This study authenticates the appropriateness of the SOR model in predicting the advertised brand purchase intentions. The results of this study indicated that attitude has a significant mediating role in the relationship of advertisement congruity, interactivity and intrusiveness with advertised brand purchase intentions. The results further revealed that this mediation was partial for all three relationships.

The outcomes of the study are expected to benefit researchers and scholars to identify future research directions and thereby extend current know-how on gamification in general and in-game advertising in particular. The study findings will hold significance for marketers, advertisers and media planners too. By bringing out specific allied issues connected with in-game advertising, this study will help these stakeholders to plan their marketing campaigns in an efficient manner leading to higher traction and return on investment.

This study provides a new perspective to comprehend the purchase intention of gamers for brands advertised in online games through mediation by applying the underpinnings of the SOR model.

This paper aims to test the relationships between shopping enjoyment, economic motivation, apparel shopping self-confidence, perceived informativeness, perceived irritation and buying intention, using Uses and Gratification (U&G) theory, in a mediated model using virtual dressing room (VDR) media.

The proposed mediation model is tested using the PROCESS (Version 3.0) macro for SPSS with bootstrapping.

Results indicate that shopping enjoyment, economic motivation and apparel shopping self-confidence have no direct relationship with buying intention. Additionally, no indirect relationship was found between apparel shopping self-confidence and buying intention. However, outcomes show that both perceived VDR informativeness and perceived VDR irritation mediate the relationships of shopping enjoyment and economic motivation with buying intention by different mechanisms when using VDR media. Additionally, the relationship between shopping enjoyment and buying intention is mediated via perceived VDR informativeness. Finally, economic motivation has both an indirect relationship with buying intention through perceived VDR irritation and a serial mediated relationship via perceived VDR irritation and informativeness.

This study is original in that it investigates the mediating effect of informativeness and irritation, from U&G theory, on buying intention during VDR media usage. Previous research suggests a direct relationship between shopping enjoyment, economic motivation, apparel shopping self-confidence, informativeness, irritation and buying intention. Results of this research suggest that online retailers should consider the different and complex mediating roles informativeness and irritation play in the relationship between consumer attributes and buying intention when adding media to a website.

Robot localization technology has been widely studied for decades and a lot of remarkable approaches have been developed. However, in practice, this technology has hardly been applied to common day-to-day deployment scenarios. The purpose of this paper is to present a novel approach that focuses on improving the localization robustness in complicated environment.

The localization robustness is improved by dynamically switching the localization components (such as the environmental camera, the laser range finder and the depth camera). As the components are highly heterogeneous, they are developed under the robotic technology component (RTC) framework. This simplifies the developing process by increasing the potential for reusability and future expansion. To realize this switching, the localization reliability for each component is modeled, and a configuration method for dynamically selecting dependable components at run-time is presented.

The experimental results show that this approach significantly decreases robot lost situation in the complicated environment. The robustness is further enhanced through the cooperation of heterogeneous localization components.

A multi-component automatic switching approach for robot localization system is developed and described in this paper. The reliability of this system is proved to be a substantial improvement over single-component localization techniques.

Wind power is the one of best natural resources to meet the demands of electricity in India. In this regard, one of engineering college in Visakhapatnam has procured wind turbine generators of 200 kWp and got these installed on the rooftop of the college buildings for research and power generation. After starting the mills, huge vibrations were experienced by the staff and students in the laboratories and classrooms. So, the purpose of this paper is to carry out vibration and noise studies on wind turbine generator to identify the problem for high vibrations and suggest a novel method for vibration reduction.

Experimental vibration and natural frequency investigations are carried when wind velocity around 6.0 m/s using frequency analyzer, impact hammer, condenser microphone and accelerometer. An attempt is made to reduce the vibration and noise level of wind turbine generator by inserting a steel coil spring of 300 mm length having 20 turns in series with turnbuckle D shackle assembly, which is used to connect the wind turbine generator to the hook mounted on slab.

A high vibration velocity of 9.9 mm/s was observed on at base frame of wind turbine generator. The natural frequencies of hook and slab are observed in between 15 to 20 Hz from the natural frequency test. A high noise of 94.67 dBA is observed at a distance of 1 m from the base of wind turbine generator along the rotational axis of rotor. After modification to the baseline, WTG the vibration and noise levels are reduced to 4.8 mm/sec and 77.76 dBA, respectively.

This is the first time to study the huge vibrations generated in wind turbine generators installed on the rooftop of the college. Developed a novel methodology to reduce the vibrations by inserting a steel coil springs in turnbuckle D shackle assembly of wind turbine generators. After modification, wind turbine generator are running successfully without any high vibrations.