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1 – 10 of over 1000S.L. Fu and R.M. Chiou
Thick film thermistors based on the thermistor powder of the sintered ceramic thermistor, prepared from oxides of nickel, cobalt and manganese, were fabricated and studied. The…
Abstract
Thick film thermistors based on the thermistor powder of the sintered ceramic thermistor, prepared from oxides of nickel, cobalt and manganese, were fabricated and studied. The ingredient compositions, including the composition proportions, influenced the properties of thick film thermistors. The effects of the compositions of the sintered ceramic thermistors, the amounts of additives used and the compositions of the glass binders on the properties of the thick film thermistors were also studied.
O.S. Aleksić, B.M. Radojčić and R.M. Ramović
The paper aims to focus on thick film planar thermistors.
Abstract
Purpose
The paper aims to focus on thick film planar thermistors.
Design/methodology/approach
Thick film planar thermistors such as rectangular, sandwich, multilayer, segmented and interdigitated were printed of law temperature NTC paste called NTC 3K3 95/2 (Ei Iritel). Their resistivity was measured at room temperature as a function of volume resistivity variations due to electrode effect (diffusion of PdAg into NTC layer) and variation of geometrical parameters such as length l, width w, thickness d, number of segments n. The experimental data obtained were used in forming a model by the simple fitting procedure for counting diffusion effect on volume resistivity and resistivity dependence on geometrical parameters.
Findings
Thermal behavior of NTC thick films was measured in the range of −30‐120°C. Exponential factor B was fitted for measured values and included in the proposed thick film thermistors model. The agreement of measured and calculated data enables simulation of new thermistor geometries.
Originality/value
The paper focuses on the experiment which was the first step in forming a total physical/mathematical model proposed for thick film thermistor resistivity.
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S. Aleksić Obrad, Nikolić M. Pantelija and Paraskevopoulos M. Konstantinos
The aim of this paper is to investigate the behavior of a new nanometric particle NTC thermistor paste and thick films obtained by screen printing.
Abstract
Purpose
The aim of this paper is to investigate the behavior of a new nanometric particle NTC thermistor paste and thick films obtained by screen printing.
Design/methodology/approach
Nanometric powder of NTC thermistors based on complex spinel was made by calcination of an oxide mixture and ultra fast ball milling. Characterization of the new powder was done on compacts sintered in different conditions. Segmented thermistors were screen printed on alumina substrata, dried and fired in a conveyor furnace at 850°C/10 min. Segmented thermistors were indirectly heated by a glass sealed heater placed between them in the middle. The system was put in a tube with a regulated air flow to serve as a volume thermistor sensor based on heat loss.
Findings
The sintered thick film samples and NTC powder compacts measurements could help in choosing the optimal technology conditions during the production of NTC devices. The NTC segmented thermistors were suitable both for heated sensors and self heated sensors.
Practical implications
Low temperature thick film thermistor pastes based on nanometer powder of complex spinel are of interest due to their importance in sensor applications.
Originality/value
This work predicts that high temperature pastes of the same material can be realized with characteristics superior to those of low temperature paste such as NTC 3K3 or similar.
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José Ignacio Castillo-Manzano, Mercedes Castro-Nuño and Rafael Pozo-Barajas
This paper aims to identify the drivers that explain loyalty behavior in cruise tourism with the aim of achieving a better understanding of repeat cruisers’ intentions to sail on…
Abstract
Purpose
This paper aims to identify the drivers that explain loyalty behavior in cruise tourism with the aim of achieving a better understanding of repeat cruisers’ intentions to sail on the same ship or on another ship belonging to the same cruise line or cruise corporation.
Design/methodology/approach
Based on over 150,000 online reviews about their satisfaction and experience posted by cruisers using so-called electronic Word of Mouth (e-WOM), the authors apply both a graphic and an econometric technique through input-output circular plots and discrete choice models.
Findings
The main results show that cruisers’ behavior is influenced by multiple onboard attributes, such as the service crew, entertainment options, type of cabin, some characteristics of the ship (age, capacity) and the cruise line (Premium-Luxury versus mainstream), and, specifically, the quality and variety of the gastronomic experience.
Practical implications
The results highlight that repeats cruisers are predominantly linked to a cruise company or a cruise corporation rather than a particular ship. This result provides information on the moderators that can influence the customers’ repetition behavior, which might be useful for planning revenue management and extending knowledge on hospitality loyalty in general and in the cruise industry in particular, specifically under the current uncertainty due to the COVID-19 pandemic.
Originality/value
The previous literature has essentially examined revisit intentions in the cruise market from a qualitative approach and the authors have found no study to date that has simultaneously addressed this issue in three dimensions, namely, ship, cruise line and cruise corporation. The research fills this gap by determining the reasons why passengers would repeat a cruise either on the same ship, with the same cruise line or the same cruise corporation based on previous experience.
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Jingen Zhou, Shu-Ling (Peggy) Chen and Wenming (Wendy) Shi
The cruise industry has witnessed steady growth, with passenger volume increasing from 17.8 million in 2009 to 30 million in 2019. In the context of global competition and an…
Abstract
Purpose
The cruise industry has witnessed steady growth, with passenger volume increasing from 17.8 million in 2009 to 30 million in 2019. In the context of global competition and an uncertain business environment, competition in business has changed dramatically from battles of “firm versus firm” to “supply chain versus supply chain”. Hence, the purpose of this paper is to understand the cruise industry from a chain perspective, which has not drawn widespread research attention.
Design/methodology/approach
This paper brings together the insights, opinions, concepts and frameworks from a literature review of different disciplines (maritime shipping, tourism management, logistics management, operations management and supply chain management) and analysis results from 22 semi-structured interviews to make an early attempt to conceptualise the cruise supply chain (CSC).
Findings
The cruise supply chain is elaborated on the process, the role of each entity and its characteristics by comparing with the maritime supply chain and tourism supply chain. Based on the understanding of the CSC, two specific characteristics of the Chinese CSC are examined, which need further investigation.
Originality/value
The CSC is articulated with detailed processes and characteristics based on the literature review and empirical study. The findings of this paper not only advance the knowledge of the supply chain in the cruise industry but also highlight the importance of further research on the CSC.
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Elsa Pedroso and Carlos F. Gomes
The purpose of this paper is to present and validate a multidimensional approach to measure the effectiveness of management accounting systems.
Abstract
Purpose
The purpose of this paper is to present and validate a multidimensional approach to measure the effectiveness of management accounting systems.
Design/methodology/approach
Based on an extensive literature review, the most appropriate information dimensions were identified. To validate the multidimensional tool, survey data were obtained from 284 chief financial officers of Portuguese small- and medium-sized enterprises (SMEs). A structural equation model, evaluating the influence on the managerial performance, was used to verify the nomological validity of this new construct.
Findings
The results of this study suggest that the effectiveness of management accounting systems can be measured using a second-order construct. This construct includes 14 items, covering four dimensions of the management information characteristics.
Research limitations/implications
Although contributing to the advancement of knowledge, it is, however, limited to the Portuguese organizational environment and culture. Therefore, further studies should be carried out in other organizational contexts and cultures, to test and validate this multidimensional tool.
Practical implications
The multidimensional tool presented and validated in this study can be used by executives of SMEs for assessing the effectiveness of their management accounting systems, which can help to improve SMEs' performance measurement and benchmarking processes.
Originality/value
On the best of our knowledge, this is the first study wherein the management accounting system is modeled as a second-order construct from the perspective of multidimensional information characteristics. This second-order approach recognizes the contribution and retains the distinctive nature of each first-order construct, representing the management accounting system. This multidimensional construct could be very important for future research by allowing to capture synergies resulting from the balanced development of its four information dimensions, and consequently, offer new contributions to management accounting knowledge.
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Fangfang Sun, Tianze Wang and Yong Yang
Rapid prototyping (RP) technology is widely used in many fields in recent years. Bone tissue engineering (TE) is an interdisciplinary field involving life sciences, engineering…
Abstract
Purpose
Rapid prototyping (RP) technology is widely used in many fields in recent years. Bone tissue engineering (TE) is an interdisciplinary field involving life sciences, engineering and materials science. Hydroxyapatite (HAp) are similar to natural bone and it has been extensively studied due to its excellent biocompatibility and osteoconductivity. This paper aims to review nanoscaled HAp-based scaffolds with high porosity fabricated by various RP methods for bone regeneration.
Design/methodology/approach
The review focused on the fabrication methods of HAp composite scaffolds through RP techniques. The paper summarized the evaluation of these scaffolds on the basis of their biocompatibility and biodegradability through in vitro and in vivo tests. Finally, a summary and perspectives on this active area of research are provided.
Findings
HAp composite scaffold fabricated by RP methods has been widely used in bone TE and it has been deeply studied by researchers during the past two decades. However, its brittleness and difficulty in processing have largely limited its wide application in TE. Therefore, the formability of HAp combined with biocompatible organic materials and fabrication techniques could be effectively enhanced, and it can be used in bone TE applications finally.
Originality/value
This review paper presented a comprehensive study of the various types of HAp composite scaffold fabricated by RP technologies and introduced their potential application in bone TE, as well as future roadmap and perspective.
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Chiara Tagliaro, Yaoyi Zhou and Ying Hua
Workplace space utilization data reveals patterns of space usage, the occupants’ presence and mobility within the office building. Nowadays, emerging technology such as smart…
Abstract
Purpose
Workplace space utilization data reveals patterns of space usage, the occupants’ presence and mobility within the office building. Nowadays, emerging technology such as smart sensors and devices can revolutionize the measurement of space utilization data, which is originally dominated by human observers with paper and pencil. However, these novel instruments are often used in an old fashion, which restricts the exploitation of their full potential. This study aims to shed new light on the benefits and limits of using smart technology in measuring space utilization data and discusses the challenges and opportunities in analyzing the data measured by smart sensors.
Design/methodology/approach
First, the literature regarding common methods and previous studies about office space utilization measurement was reviewed. Then, a data set consisting of space utilization data collected through Passive Infra-Red sensors for 35 meeting rooms in a bank building was carefully evaluated. Finally, the space utilization results based on methods calculated in two different granularities were compared.
Findings
The number of occupied hours calculated at an hour level was 1.32-hour larger than that calculated at a minute level. As both results show the concept of space utilization, which was the amount of time that the space was occupied, this paper revealed a gap between the two space utilization calculation methods and further discussed the issues and challenges for future space utilization data analysis and benchmarking.
Originality/value
To the best of the authors’ knowledge, this is the first study critically addressing office space utilization issues by comparing calculation methods in different granularity.
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Yaoyi Zhou, Ying Hua and Jingyang Liu
The purpose of this paper is to review the use of technologies for measuring space occupancy to guide the selection of appropriate tools for workplace post-occupancy evaluation…
Abstract
Purpose
The purpose of this paper is to review the use of technologies for measuring space occupancy to guide the selection of appropriate tools for workplace post-occupancy evaluation (POE) studies. The authors focus on how actual space occupancy was measured in previous studies and the pros and cons of the different technologies and tools. This paper also addresses research gaps and directions for future research.
Design/methodology/approach
The space occupancy measures/tools are categorized based on the three types of technologies: environmental/ambient sensors, wearable sensors/smartphones and computer vision. A total of 50 studies are reviewed to identify the capabilities and limitations of these measurements.
Findings
Based on review results, the authors propose that although sensor technology can be a useful addition to the measures/tools list, a comprehensive review of the research goal, the occupants' behavior, and the environmental settings' characteristics should be conducted beforehand. Selecting appropriate technology is critical for collecting the proper behavioral data type, with a lower level of surveillance and increased validity.
Originality/value
This paper urges critical thinking about existing occupancy measures/tools across various fields, to inform the adoption and creation of new building occupancy measures. The knowledge of emerging sensor technology allows researchers to better study the temporal patterns of occupant behavior over extended periods and in a wide range of settings.
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Eliana Barrenho and Marisa Miraldo
This chapter aims at providing an understanding of the research and devlopment (R&D) process in the pharmaceutical industry, by exploring the methodological challenges and…
Abstract
This chapter aims at providing an understanding of the research and devlopment (R&D) process in the pharmaceutical industry, by exploring the methodological challenges and approaches in the assessment of the determinants of innovation in the pharmaceutical industry. It (i) discusses possible methodological approaches to model occurrence of events; (ii) describes in detail competing risks duration models as the best methodological option in light of the nature of pharmaceutical R&D processes and data; (iii) concludes with an estimation strategy and overview of potential covariates that have been found to correlate with the likelihood of failure of R&D pharmaceutical projects.
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