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Developing a Design Guideline for a User-Friendly Home Energy-Saving Application That Aligns with User-Centered Design (UCD) Principles
(2025-01-01)
Tongsubanan, Sarunporn
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Kasemsarn, Kittichai
Regarding issues with the majority of home energy-saving applications, the information is often too difficult for users to understand, and they struggle to comprehend communication via graphics or images displayed on the application’s screen. Furthermore, little is known about how users of home energy-saving applications behave. Therefore, this research aims to develop and evaluate a user-friendly design guideline for a home energy-saving application that applies four stages of User-Centered Design (UCD) processes. To identify significant issues and preliminary solutions, this research employed two rounds of co-creation activities involving nine experts and nine non-experts. Subsequently, an application prototype encompassing settings, about, home data, home assessment, and assessment summary was developed. The prototype underwent evaluation through an online questionnaire with 160 participants from four user groups, spanning expert and non-expert age groups. As a results from all four factors, the application received a mean score = 4.35 (good) from both non-experts and experts. This demonstrates that the prototype adopted with the guideline performed well in terms of User Experience, User Interface and User-Centered Design. This research provides developers and stakeholders with valuable guidelines to create applications or programs that are more efficient and user-friendly. This guideline is applicable to a wide range of sectors (eg, residential homes, workplaces, and educational institutions) and various domains (eg, Internet of Things (IoT), Home Energy Management Systems (HEMS), mobile applications, AI-Assisted in IoT-based Smart Microgrids). This would lead to the creation of applications that are easy for users to navigate and presentations that are impactful, ultimately helping to decrease energy usage and promote a more sustainable environment.
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Application of BIM and Virtual Reality of System Integration Design and Development in Medical Building Projects: A Case Study in China
(2024-07-01)
Chen, Jiahao
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Laokhongthavorn, Laemthong
Design outcomes in the Medical Building Projects (MBPs) must satisfy the demand of the medical staff and stakeholders. However, they often do not have the relevant engineering expertise, so the design team is prone to misunderstandings when communicating with them using traditional two-dimensional (2D) Computer-Aided Design (CAD) drawings. The medical staff may not readily visualize and understand the design and then provide feedback to the designer through professional medical requirements or advice, which results in the need to redesign and carry out additional work during the design phase, thus delaying the progress of the MBPs. To address these challenges, this study aims to develop an integrated system based on BIM, advanced rendering engines, and VR technology for use in non-immersive and immersive VR environments. Moreover, in this study, the integrated system was applied to the infection-building project of the People's Hospital of Qingbaijiang District, Chengdu City, and semi-structured interviews were distributed to 16 engineers, designers, contractors, and medical staff who had been involved in the whole project to validate the practicality and effectiveness of the integrated system. The results indicate that this system integration is an efficient visual communication and simulation tool in medical design. Key advantages include enhanced communication efficiency between the design team and medical stakeholders, improved visual interaction, and streamlined decision-making processes within a 3D VR/BIM environment. The successful implementation of this integrated system is expected to significantly aid design teams and stakeholders in effectively managing medical design tasks in future projects.
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A Marketing Plan for Applying 5W1H (What, Why, Where, When, Who, and How) in Design Postgraduate Degrees: A Case Study from Thailand
(2022-01-01)
Kasemsarn, Kittichai
Postgraduate degrees in design have changed due to the latest technology and trends. Moreover, there is a lack of research regarding the relationship between the behavior of students and marketing plans for the curriculum. Therefore, this research aims to explore the concept of treating postgraduate design students in Thailand as customers by applying 5W1H (what, why, where, when, who, and how) to the criteria, behaviors, and trends in choosing the curriculum. This study set up online in-depth interviews for twenty postgraduate degree students in this area from four public universities in Thailand in April 2020. Raw data were transcribed into a thematic coding analysis. The findings illustrate that design students need new and updated knowledge (what), and choose the course due to its reputation (why) by themselves without recommendations from others (who). Additionally, they are aware of social media advertising (where), and search in-depth information before the end of the year or six months before term begins (when) from official websites to compare curriculums (how). Finally, this research contributes to knowledge about how marketing plans (5W1H) can understand how postgraduate design students choose their curriculums. As a result, universities could adapt, design, and offer appropriate curriculums and promote them effectively to students.
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Heuristic Strategies: Achieving Influence Motivation with Success to Design Industrial Products in Projects from the Department of Architectural Education and Design
(2022-01-01)
Egwutvongsa, Songwut
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Piramgran, Thanat
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Seviset, Somchai
This research aimed to study the achievement of motivation from the learning procedure of heuristic strategies. Besides, it resulted in the success of design product projects from the students in the Department of Architectural Education and Design, King Mongkut’s Institute of Technology Ladkrabang with the learning comparison method and student satisfaction between control groups for normal study and experiment groups with heuristic strategies. This research studied the results from fourth-year student groups studying in the curriculum of Architectural Education and Design. A total of forty-four people were selected by using the observation method and asking for satisfied attributions in the groups to represent the score levels from the personal project assessment. In this case, it also used a 5-point rating scale to make t-test data analysis for Independence with results comparison, and it was found that the experiment group studying with heuristic strategies had the testing scores of the personal project assessment in the higher level than the controlling group with studying in a normal way with statistical significance at the level of.05, including with the reliability assessment from the students in the designing product project, which found that the experiment group with studying for heuristic strategies gaining the reliability level from the personal project at a higher level than the controlling group with studying in a normal way with statistical significance at the level of.05.
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Analysis of a solid oxide fuel cell and a molten carbonate fuel cell integrated system with different configurations
(2018-01-01)
Jienkulsawad, Prathak
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Saebea, Dang
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Patcharavorachot, Yaneeporn
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Kheawhom, Soorathep
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Arpornwichanop, Amornchai
A solid oxide fuel cell with internal reforming operation is run at partial fuel utilization; thus, the remaining fuel can be further used for producing additional power. In addition, the exhaust gas of a solid oxide fuel cell still contains carbon dioxide, which is the primary greenhouse gas, and identifying a way to utilize this carbon dioxide is important. Integrating the solid oxide fuel cell with the molten carbonate fuel cell is a potential solution for carbon dioxide utilization. In this study, the performance of the integrated fuel cell system is analyzed. The solid oxide fuel cell is the main power generator, and the molten carbonate fuel cell is regarded as a carbon dioxide concentrator that produces electricity as a by-product. Modeling of the solid oxide fuel cell and the molten carbonate fuel cell is based on one-dimensional mass balance, considering all cell voltage losses. Primary operating conditions of the integrated fuel cell system that affect the system efficiencies in terms of power generation and carbon dioxide utilization are studied, and the optimal operating parameters are identified based on these criteria. Various configurations of the integrated fuel cell system are proposed and compared to determine the suitable design of the integrated fuel cell system.
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Analysis design and experimental verification of a two-switch forward converter
(2015-12-01)
Wuti, V.
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Bunlaksananusorn, C.
A forward converter is an isolated DC-DC converter widely used in switching power supplies with output power ratings ranging from 50W to 400W. The conventional forward converter requires a transformer with a tertiary winding to assist in magnetic core reset and subjects its power switch to a high voltage at turn-off. These shortcomings are eliminated in the two-switch forward converter. This paper presents analysis, design and experimental verification of a two-switch forward converter. First, the converter operation is analyzed, enabling its key equations and important waveforms to be established. Then, the converter design, including both the power circuit and feedback controller, is illustrated in detail. Finally, experimental results from the prototype circuit are presented to confirm the validity of the analysis and design.
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Window display design of large scale department stores as determinant of corporate image and positioning strategies
(2015-09-01)
Kernsom, Thitipann
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Moorapun, Chumporn
Window displays play an important role as environmental cues that create competitive advantages and influence customer's perception towards the image of a large scale department store. This research based on the environmental psychology theories aimed to determine the differentiation of window display design settings in large scale department stores in Bangkok in terms of attracting prospective customers and conveying their merchandising messages. This research also explored to what extent the perception of the target customers would be affected by different positioning strategies and various display design settings of the department stores. A set of pictorial stimulus with different design elements and composition settings was used to ascertain the perceptual responses and decision to purchase of a group of 619 subjects. The findings showed that design elements and composition settings used in window display affected customers' perceptions towards merchandising messages considerably.
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Analysis design and experimental verification of a quadratic boost converter
(2015-01-26)
Tattiwong, K.
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Bunlaksananusorn, C.
This paper presents analysis, design and experimentation of a Quadratic Boost Converter (QBC). Operation of the QBC is analyzed, leading to mathematical expressions that can be used to design the converter. Based on the derived analytical expressions, a 100W, 12V-to-48V, QBC converter is designed and built. Experiment shows that the prototyped converter operates satisfactorily throughout its operating range and achieves the highest efficiency of 83%.
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Designing apparatus for highly precise measurement of electrical conductivity and seebeck coefficient from 85 k to 1200 k
(2013-10-04)
Budngam, Sopon
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Wichainchai, Aree
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Pimmongkol, Saichol
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Tipparach, Udom
We describe the development of apparatus for measuring of electrical conductivity and Seebeck coefficient with high precision from 85 K to 1,200 K. Electrical resistance was measured by means of four-point probe method as a function of temperature. The temperature below 400 K was measured by using type T thermocouple in vacuum system was used and from 400 to 1,200 was measured by using Type S was applied for temperature between 400 and 1200 Kelvin in an inert gas system. With the dimensions of the specimen, the electrical resistivity (ρT) can be obtained in the unit of microohm-centimeter (μΩ - cm) and be written in polynomial, ρ<inf>T</inf> = -0.3191 + 6.8 × 10-3T - 6.0 × 10-7 T2 + 8.0 × 10-10T3. The electrical conductivity can be obtained by taking inversion of the electrical resistivity. Seebeck coefficient (α<inf>T</inf>) can be calculated in microvolt per Kelvin as follows: α<inf>T</inf> = 1.9653 - 1.49 × 10-2T + 9.0 × 10-5T2 - 2.0 × 10-7T3 + 2.0 × 10-10T4 - 1.0 × 10-13T5 + 3.0 × 10-17T6 when T is temperature in K. The Seebeck coefficient data was compared with X-ray diffraction (XRD) and X-ray fluorescence (XRF) of the specimen. The result showed that our developrd apparatus yields the same as standard method when copper with purity greater than 99 percent was employed. © (2013) Trans Tech Publications, Switzerland.
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Multiple critical pole maximally flat RC active filter with sharp cutoff
(1986-01-01)
Thajchayapong, P.
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Kimpan, C.
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Rungsunseri, Y.
A maximally flat RC active filter with sharp cutoff can be achieved by including single or multiple pairs of coincident transmission zeros but at the expense of high Q-factor of the critical pole pair. A novel design technique is proposed here to reduce the Q-factor of such filters by increasing the multiplicity of the critical pole pairs. Hence a new class of sharp cutoff maximally flat RC active filters with low sensitivity is obtained. © 1986, The Institution of Electrical Engineers. All rights reserved.

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