Browsing by Author "Hsu, Shang-Hwa"

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A case-based reasoning approach to generating new product ideas
(2006-08-01)
Wu, Muh-Cherng
;
Lo, Ying-Fu
;
Hsu, Shang-Hwa
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
This paper presents an approach to facilitate the generation of new product ideas. In this approach, a product is represented by a vector, which involves a number of product attributes. These attributes are defined based on the user-centered design (UCD) paradigm. That is, the context of use and interactions with users for the product is described by these attributes. By the product representation, a product database can be established. For a benchmarking product, we use the case-based reasoning (CBR) technique to retrieve those products, which are "sufficiently relevant" to the benchmarking one, from the database. The functions of the retrieved products are the candidate new ideas to be added on the benchmarking product. These retrieved products are screened manually to identify creative and valuable ideas. A prototype system of this approach has been implemented. Experiments show that the proposed approach outperforms the brainstorming technique, which has been widely used in industry.
A case-based reasoning approach to generating new product ideas
(2006-08-01)
Wu, Muh-Cherng
;
Lo, Ying-Fu
;
Hsu, Shang-Hwa
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
This paper presents an approach to facilitate the generation of new product ideas. In this approach, a product is represented by a vector, which involves a number of product attributes. These attributes are defined based on the user-centered design (UCD) paradigm. That is, the context of use and interactions with users for the product is described by these attributes. By the product representation, a product database can be established. For a benchmarking product, we use the case-based reasoning (CBR) technique to retrieve those products, which are "sufficiently relevant" to the benchmarking one, from the database. The functions of the retrieved products are the candidate new ideas to be added on the benchmarking product. These retrieved products are screened manually to identify creative and valuable ideas. A prototype system of this approach has been implemented. Experiments show that the proposed approach outperforms the brainstorming technique, which has been widely used in industry.
A fuzzy CBR technique for generating product ideas
(2008-01-01)
Wu, Muh-Cherng
;
Lo, Ying-Fu
;
Hsu, Shang-Hwa
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
This paper presents a fuzzy CBR (case-based reasoning) technique for generating new product ideas from a product database for enhancing the functions of a given product (called the baseline product). In the database, a product is modeled by a 100-attribute vector, 87 of which are used to model the use-scenario and 13 are used to describe the manufacturing/recycling features. Based on the use-scenario attributes and their relative weights - determined by a fuzzy AHP technique, a fuzzy CBR retrieving mechanism is developed to retrieve product-ideas that tend to enhance the functions of the baseline product. Based on the manufacturing/recycling features, a fuzzy CBR mechanism is developed to screen the retrieved product ideas in order to obtain a higher ratio of valuable product ideas. Experiments indicate that the retrieving-and-filtering mechanism outperforms the prior retrieuing-only mechanism in terms of generating a higher ratio of valuable product ideas. (c) 2006 Elsevier Ltd. All rights reserved.
A predictive model for acute allograft rejection of liver transplantation
(2018-03-15)
Liu, Chien-Liang
;
Soong, Ruey-Shyang
;
Lee, Wei-Chen
;
Chen, De-Hsuan
;
Hsu, Shang-Hwa
Orthotopic liver transplantation (OLT) has become an increasingly used treatment for end-stage liver disease. However, acute allograft rejection is still a problem in postoperative care of liver transplantation with immunosuppressive therapy and it can lead to allograft damage and harm the survival of liver transplantation patient. This work proposes to use data-driven approach to build a predictive model for acute rejection. We consider not only prediction accuracy, but also interpretability of the prediction outcome in building the predictive model, so that the medical staffs can identify how the prediction is induced from data. The experiments use the real data provided by liver transplantation intensive care unit (ICU) of Chang Gung Memorial Hospital, Taiwan. In this work, the data is from a medical center, in which the patient data ranges from 2004 to 2013, and the number of data records is approximately 2 million. To the best of our knowledge, this is the first work using a large-scale database to focus on liver transplantation and generate interpretable rules that could be used by medical staffs. We compare with several methods, including SVM, ANN and random forest, and the experimental results indicate that the proposed method is comparative, and provides interpretable results. Central to the proposed method is to consider interpretability, and the goal is to provide interpretable results for the medical staffs to make decisions. The proposed transformation algorithms belong to data-driven approaches, so they could be applied to other intelligent or expert systems. Moreover, the outcomes are presented in rule format, which could be used by medical staffs and other expert systems. (C) 2017 Elsevier Ltd. All rights reserved.
A STUDY OF FITTS' LAW ON GOAL-DIRECTED AIMING TASK WITH MOVING TARGETS
(2011-08-01)
Chiu, Tien-Ting
;
Lin, Chun-Ling
;
Young, Kuu-Young
;
Lin, Chin-Teng
;
Hsu, Shang-Hwa
Most research based on Fitts' law define a log-linear relationship between temporal and spatial accuracy in goal-directed aiming tasks using stationary targets. Whether this relationship holds or not when the targets have varying velocities, and how the behavioral strategies and physical activities may change accordingly are of interest. The aim of this study was to investigate the relationship between temporal and spatial accuracy in goal-directed aiming tasks with moving targets. Participants were asked to aim at two target widths using a joystick. Results demonstrated that in a goal-directed aiming task there was a negative effect on performance when target velocity was increased or target width was decreased. Participants moved faster and then made more systematic errors in a high-velocity target condition. Results may be applicable to the complex perceptual-motor behavior of people who perform tasks using computers.
Activity-oriented design of Health Pal: A smart phone for elders' healthcare support
(2008)
Zao, John K.
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Fan, Shih-Chen
;
Wen, Ming-Hui
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Hsu, Chun-Tang
;
Hung, Chung-Hoo
Wireless telephones and personal digital assistants are emerging, as the information hubs connect their human users with assorted electronic devices and the World Wide Web. As such, they quickly become the de facto basis for personalized information services. The Kannon project team at the National Chiao Tung University (NCTU) in Taiwan is developing a ubiquitous service infrastructure for elders' healthcare support. Among their deliverables, there is a PDA Phone, christened Health Pal, which can communicate with Bluetooth/ZigBee devices, universal plug-and-play (UPnP) e-home service platforms, and online healthcare providers to offer 24/7 healthcare services to elderly people. This paper presents the early results of this effort including the functional and operational concepts of Health Pal as well as the activity-oriented approach of its design. Preliminary results of its usefulness and usability evaluations are reported. A comparison of this platform against several similar prototypes was also included to illustrate the advantage of applying activity-oriented design approach to human-computer interactions. Copyright (C) 2008.
AN ASSESSMENT OF THE EFFECTS OF NAVIGATION MAPS ON DRIVERS' MENTAL WORKLOADS
(2014-06-01)
Chao, Chin-Jung
;
Lin, Chia-Hsyang
;
Hsu, Shang-Hwa
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
This study compares the mental workloads and subjective feelings of drivers navigating different road patterns using different formats of electronic and paper maps. The results show drivers experience lower mental workloads when using 2D electronic maps compared to 3D electronic maps. Significant differences in galvanic skin responses were observed for navigation map formats with different road intersection patterns. The low- and high-frequency components of heart rate variability showed significant differences between map formats for regular road intersections, but no significant differences between map formats for irregular road intersections. Statistically significant effects on subjective feelings were found between different map formats and road intersection patterns. The wider implications of the study results for the design and use of navigation map interfaces are discussed.
AN ASSESSMENT OF THE EFFECTS OF NAVIGATION MAPS ON DRIVERS\' MENTAL WORKLOADS
(2014-06-01)
Chao, Chin-Jung
;
Lin, Chia-Hsyang
;
Hsu, Shang-Hwa
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
This study compares the mental workloads and subjective feelings of drivers navigating different road patterns using different formats of electronic and paper maps. The results show drivers experience lower mental workloads when using 2D electronic maps compared to 3D electronic maps. Significant differences in galvanic skin responses were observed for navigation map formats with different road intersection patterns. The low- and high-frequency components of heart rate variability showed significant differences between map formats for regular road intersections, but no significant differences between map formats for irregular road intersections. Statistically significant effects on subjective feelings were found between different map formats and road intersection patterns. The wider implications of the study results for the design and use of navigation map interfaces are discussed.
ASSESSING EFFECTIVENESS OF VARIOUS AUDITORY WARNING SIGNALS IN MAINTAINING DRIVERS' ATTENTION IN VIRTUAL REALITY-BASED DRIVING ENVIRONMENTS
(2009-06-01)
Lin, Chin-Teng
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Chiu, Tien-Ting
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Huang, Teng-Yi
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Chao, Chih-Feng
;
Liang, Wen-Chieh
Drivers' fatigue contributes to traffic accidents, so drivers must maintain adequate alertness. The effectiveness of audio alarms in maintaining driving performance and characteristics of alarms was studied in a virtural reality-based driving environment. Response time to the car's drifting was measured under seven conditions: with no warnings and with continuous warning tones (500 Hz, 1750 Hz, and 3000 Hz), and with tone bursts at 500 Hz, 1750 Hz, and 3000 Hz. Analyses showed the audio warning signals significantly improved driving. Further, the tones' spectral characteristics significantly influenced the effectiveness of the warning.
Custos Remote On-demand Healthcare Aided with Wireless Sensors and Mobile Phones
(2008)
Zao, John K.
;
Fan, Shih-Chen
;
Yang, Bing-Shiang
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Hsu, Shang-Hwa
;
Cheng, Han-Chin
Telemonitoring and remote healthcare are two ICT techniques promise to deliver cost effective long-term healthcare services to the aging population worldwide. Anticipating an emerging market opportunity, NCTU Kannon project team is creating Custos, an open composeable platform for developing remote on-demand healthcare applications using smart phones and wireless sensor networks. Camps' is integrated readily with Internet web services and UPnP digital-home platform so that it can be used to detect abnormal health conditions through multisensor data fusion, adapt environment conditions to user needs, dispatch medical alerts and instigate remedial actions via SMS/RSS communication. Moreover, Custos is easy to program because it uses Sun SPOT and Squawk Java J2ME as its sensor/actuator hub. In this position paper, we present the design principles, system architecture and operation concepts of Custos as well as a pilot plan for clinical trials in the Geriatric Psychiatry Ward of Wei-Gong Memorial Hospital in Miaoli, Taiwan.
Development of wireless brain computer interface with embedded multitask scheduling and its application on real-time driver's drowsiness detection and warning
(2008-05-01)
Lin, Chin-Teng
;
Chen, Yu-Chieh
;
Huang, Teng-Yi
;
Chiu, Tien-Ting
;
Ko, Li-Wei
Biomedical signal monitoring systems have been rapidly advanced with electronic and information technologies in recent years. However, most of the existing physiological signal monitoring systems can only record the signals without the capability of automatic analysis. In this paper, we proposed a novel brain-computer interface (BCI) system that can acquire and analyze electroencephalogram (EEG) signals in real-time to monitor human physiological as well as cognitive states, and, in turn, provide warning signals to the users when needed. The BCI system consists of a four-channel biosignal acquisition/amplification module, a wireless transmission module, a dual-core signal processing unit, and a host system for display and storage. The embedded dual-core processing system with multitask scheduling capability was proposed to acquire and process the input EEG signals in real time. In addition, the wireless transmission module, which eliminates the inconvenience of wiring, can be switched between radio frequency (RF) and Bluetooth according to the transmission distance. Finally, the real-time EEG-based drowsiness monitoring and warning algorithms were implemented and integrated into the system to close the loop of the BCI system. The practical online testing demonstrates the feasibility of using the proposed system with the ability of real-time processing, automatic analysis, and online warning feedback in real-world operation and living environments.
Implementation of a Human-Centric GUI for Next-Generation Intensive Care Unit
(2014-01-01)
Lu, Tsung-Che
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Hsu, Shang-Hwa
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Tzeng, Sing-Jia
;
Chang, Che-Ming
;
Van, Lan-Da
In the intensive care unit (ICU), the situations of the critical patients vary rapidly. To give the patient the necessary medical treatment, the medical staffs need to response in no time. However, making the diagnosis is not easy since there is tremendous information to be processed in ICU. In this paper, a prototype human-centric graphical user interface (GUI) based on ecological interface design (EID) is implemented by C# that is compatible with Microsoft Windows system. The human-centric GUI integrates the necessary information and will help the medical staffs to interpret them efficiently. The waveforms of artificial vital signs are displayed to show the variations of those signs instantly. Besides, the GUI can display the heart/lung/kidney indicators in radar charts to assist medical staffs aware of abnormal indicators in a visual way.
Improved Intrinsic Motivation and Muscle Activation Patterns in Reaching Task Using Virtual Reality Training for Stroke Rehabilitation: A Pilot Randomized Control Trial
(2014-01-01)
Fan, Shih-Chen
;
Su, Fong-Chin
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Chen, Sheng-Shiung
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Hou, Wen-Hsuan
;
Sun, Jui-Sheng
In long-term rehabilitation, stoke survivors might experience low motivation and poor adhesion to treatments. In such cases, off-the-shelf virtual reality (OTSVR) gaming systems can be a viable solution. The purpose of this exploratory study was to evaluate the effects of an affordable OTSVR treatment on patients\' motivation and motor capacities. The ultimate goal is to apply the advantages of the OTSVR system to the design of future systems. Twenty participants completed the follow-up assessment. Four parallel groups received treatments for three weeks: 1) virtual reality (VR) via Wii gaming; 2) conventional therapy; 3) a placebo board game; 4) no treatment. The training effects were evaluated immediately after and four weeks after treatment. Surface electromyographic activity for a reaching task was obtained from five muscles, and the time-to-peak (TTP) contractions, time that a muscle takes to reach maximum contractions, was used as a kinesiological parameter. Any functional gains were evaluated using the Jebsen-Taylor Hand Function Test and the Stroke Impact Scale. The VR group immediately demonstrated significantly shorter TTP contractions in their biceps and flexor carpi radialis compared to the those of the board game and no treatment groups (p < 0.05). The TTP contraction change between the VR group and the conventional therapy group did not have significant differences. The VR group having a marginally retentional improvement in the deltoids (p = 0.059). No long-term benefits persisted in any other muscle. However, the VR group showed higher intrinsic motivation than those of the other groups. In this pilot study, OTSVR gaming had immediate effects on motor recovery and provided motivation for treatment compliance in stroke patients.
Kannon: Ubiquitous Sensor Actuator technologies for elderly living and care - A Multidisciplinary Effort in National Chiao Tung University, Taiwan
(2006)
Zao, John K.
;
Hu, Jwu-Sheng
;
Chiou, Jin-Chern
;
Huang, Yu-Lun
;
Li, Shu-Chen
A team of researchers including computer scientists, electrical and control engineers, architects, industrial designers, human factor engineers, and cognitive scientists in the National Chiao Tung University (NCTU), Taiwan, along with their overseas collaborators launched the project Kannon, a multidisciplinary effort to develop Adaptive Assistive Technologies that can be deployed incrementally into existing private/public spaces and collaborate opportunistically to offer monitoring, assisting, communicating and rejuvenating services to healthy elders. The team combined the state-of-art information, communication and robotic know-how with the activity oriented method for product design and the modular functional approach in modern architecture in order to devise a holistic support for successful aging. This paper presents the philosophy, approach and first fruits of this project.
THE EFFECTS OF DIFFERENT NAVIGATION MAPS ON DRIVING PERFORMANCE
(2012-10-01)
Hsu, Shang-Hwa
;
Lin, Chia-Hsyang
;
Chao, Chin-Jung
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
This study evaluated the driving performance of drivers presented with 2D and 3D electronic navigation maps and a traditional paper map with various route structures. A heads-up display was used to show the different driving conditions for each navigation map system. Results revealed that the drivers using an electronic navigation map performed better compared to the drivers using a paper map. The results also indicated that drivers who used 2D-regular pattern or 2D-irregular corner maps performed more efficiently than the drivers who used a 3D-regular pattern or 3D-irregular corner maps in reaching their destinations. In addition, drivers can save time and fuel by using 2D navigation maps in unfamiliar regions.