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This paper aims to present experimental and finite volume method (FVM)-based simulation studies on the scaling effect on the capillary contact angle and entrant pressure for a three-dimensional encapsulation process of ball-grid array (BGA).

With the development of various sizes of BGA packages, the scaling effect of BGA model on capillary underfill (CUF) process is investigated together with the influences of different industrial standard solder bump arrangements and dispensing methods used as case study.

The experimental results agree well to the simulation findings with minimal deviation in filling time and similar flow front profiles for all setups. The results revealed that the capillary contact angle of flow front decreases in scale-up model with larger gap height observed and lengthens the encapsulation process. Statistical correlation studies are conducted and accurate regression equations are obtained to relate the gap height to the completion filling time and contact angle. CUF threshold capillary pressures were computed based on Leverett-J function and found to be increasing with the scale size of the package.

These statistical data provide accurate insights into the impact of BGA’s scale sizes to the CUF process that will be benefiting the future design of BGA package. This study provided electronic designers with profound understanding on the scaling effect in CUF process of BGA, which may be extended to the future development of miniature-sized BGA and multi-stack device.

This study relates the flow behaviour of encapsulant to its capillary contact angle and Leverett-J pressure threshold, in the CUF process of different BGA and dispensing conditions. To date, no research has been found to predict the threshold pressure on the gap between the chip and substrate.

This study aims to examine, via social exchange theory and social representations, how online vacation rentals (OVR) connect tourists and owners. It also aims to understand the dynamics and representations between owners and tourists in Albufeira, one of the most popular counties in the south of Portugal, supported on the theories of representation and social exchange. More specifically this research is structured on the following question: how the consequents – engagement and personalization – are materialized in the testimonies and descriptions posted on the vacation rentals platform.

The initial assumption for this exploratory study is that OVR bring both material and intangible advantages for the individual consumer and for the community of homeowners. Drawing from netnography, using textual analysis, including the use of a corpus linguistics software program (WordSmith v.6), the authors aim to capture the multidimensional meanings presented by the tourists' online reviews of their travelling experience and home rental.

The findings suggest that sharing the same nationality can facilitate engagement and influence the decision-making process (selection of property). Furthermore, findings point to a sense of place construed through affordances of place, home and a functional sense of place. Personalization of services is perceived by tourists as a positive outcome, this being the result of a positive evaluation that properties have received.

The innovative design of this research, combining textual analysis and netnography of data reviews, and the analysis of this new form of tourism are the main contributions of this paper.

This study aims to examine the impact of multidimensional perfectionism on academic procrastination among university students in India and to explore whether gender plays any role in this relationship.

Data were collected from a sample of 90 female and 60 male students, aged 18-23 years, enrolled in full-time bachelor’s and master’s programs in a central university in the National Capital Region of India and analyzed adopting different statistical techniques.

The findings indicated that academic procrastination positively correlates with all the three dimensions of perfectionism – self-oriented perfectionism, other-oriented perfectionism and socially prescribed perfectionism. The different dimensions of perfectionism also significantly predict academic procrastination. Gender differences exist with regard to other-oriented perfectionism, socially prescribed perfectionism and academic procrastination.

The results highlight that the different dimensions of perfectionism play a critical role in shaping academic procrastination among university students, but this trajectory often differs between male and female students. Further research among a larger student audience would help concretize the study conclusions.

This study extends the extant literature by examining the predictive relationships between the different dimensions of perfectionism and academic procrastination and the gender differences that exist with regard to academic procrastination and the different dimensions of perfectionism among university students, especially within the context of a developing country (i.e., India).