Mitsuo Ozawa, Gyu-Yong Kim, Gyeong-Choel Choe, Min-Ho Yoon, Ryoichi Sato and Keitetsu Rokugo
The behavior of high-performance concrete (HPC) at high temperatures is very complex and also affects the global behavior of heated HPC-based structures. Researchers have also…
Abstract
Purpose
The behavior of high-performance concrete (HPC) at high temperatures is very complex and also affects the global behavior of heated HPC-based structures. Researchers have also reported how various types of fibers affected the mechanical properties of cement-based materials at high temperatures. This study aims to discuss the effects of high temperatures on the compressive strength and elastic modulus of HPC with polypropylene (PP) and jute fiber.
Design/methodology/approach
Adding synthetic fiber (especially the PP type) to HPC is a widely used and effective method of preventing explosive spalling. Although researchers have experimentally determined the permeability of heated PP-fiber-reinforced HPC, few studies have investigated how adding natural fiber such as jute to this type of concrete might prevent spalling. In this study, the effects of high temperatures on the compressive strength and elastic modulus of HPC with PP and jute fiber (jute fiber addition ratio: 0.075 vol.%; length: 12 mm; PP fiber addition ratio: 0.075 vol.%; length: 12 mm) were experimentally investigated.
Findings
The work was intended to clarify the influence of elevated temperatures ranging from 20°C to 500°C on the material mechanical properties of HPC at 80 MPa. HSC with jute fiber showed a compressive strength loss of about 40 per cent at 100°C before recovering to full strength between 200°C and 300°C.
Originality/value
The elastic modulus of high-strength concrete decreased by 10-40 per cent between 100°C and 300°C. At 500°C, the elastic modulus was only 30 per cent of the room temperature value. The thermal expansion strain of all specimens was 0.006 at 500°C.
Details
Keywords
Jie Min Ho, Fidella Tiew and Adamu Abbas Adamu
This study aims to determine how different event quality dimensions (i.e. information availability, program content, food, staff service, merchandises, ticketing, facility and…
Abstract
Purpose
This study aims to determine how different event quality dimensions (i.e. information availability, program content, food, staff service, merchandises, ticketing, facility and convenience) individually affect the satisfaction of millennial festival participants, and how their satisfaction subsequently influence their behavioral intention.
Design/methodology/approach
The research hypotheses were tested with a sample of 272 millennial participants attending the Borneo Jazz Festival held in Miri, Sarawak.
Findings
The results indicated that program content and facility are crucial predictors of millennial participants' level of satisfaction with the event. Furthermore, the level of satisfaction would, in turn, affect their intention to revisit the event and spread positive word-of-mouth.
Research limitations/implications
The results are expected to assist festival planners in managing and designing festivals that can appeal to millennials who make up a significant percentage of tourism market.
Originality/value
The study adds to the knowledge of how music festival environment can yield loyalty amongst millennial festival participants in Sarawak, an Eastern state of Malaysia on the island of Borneo.
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Keywords
Sohui Kim and Min Ho Ryu
This study introduces a novel approach to conducting importance-performance analysis (IPA) and importance-performance competitor analysis (IPCA) by utilizing online reviews as an…
Abstract
Purpose
This study introduces a novel approach to conducting importance-performance analysis (IPA) and importance-performance competitor analysis (IPCA) by utilizing online reviews as an alternative to traditional survey-based marketing research.
Design/methodology/approach
In order to conduct IPA and IPCA utilizing online reviews, the following three steps were executed: (1) Extract key attributes of the product/service with latent Dirichlet allocation (LDA) topic modeling. (2) Measure the importance of each attribute with keyword analysis. (3) Measure the performance of each attribute with KoBERT-based sentiment analysis.
Findings
By utilizing LDA, we were able to identify significant attributes identified by real users’ reviews. The approach of evaluating attribute importance using keyword metrics offers the advantage of straightforward computations, reducing computational expenses and facilitating intuitive metric assessments. The evaluation of BERT-based performance involved adapting pre-trained language models to the specific analysis domain, resulting in substantial time savings without compromising accuracy, ultimately bolstering the dependability of the metrics. Lastly, the case study’s findings indicate a growing emphasis on the aesthetic aspects of mobile banking apps in South Korea while highlighting the pressing need for enhancements in critical areas such as stability and security, which are particularly pertinent to the finance industry.
Originality/value
Previous studies have limitations in assessing significance solely based on sentiment scores and review ratings, resulting in an inability to independently measure satisfaction and importance metrics. This research addresses these limitations by introducing a keyword frequency-based importance metric, enhancing the accuracy and suitability of these measurements independently. In the context of performance measurement, this study utilizes pre-trained large language models (LLMs), which provide a cost-effective alternative to previous methods while preserving measurement accuracy. Additionally, this approach demonstrates the potential for industry-wide competitive analysis by enabling comparisons among multiple competitors. Furthermore, the study extends the application of review data-based IPA and IPCA, traditionally used in the tourism sector, to the evaluation of financial mobile applications. This innovation expands the scope of these methodologies, indicating their potential applicability across various industries.