Pub Date : 2011-09-01DOI: 10.1109/ICAWST.2011.6163102
C. Song, K. S. Kim, M. H. Kim, S. Ryu, J. Seo, J. Kang
Conventional optical coherence tomography (OCT) systems generally have a limited imaging range within a depth of only 1-2 mm and suffers from unwanted noise such as speckle, ghost or mirror noise. To overcome these limitations, we developed a motorized-stage-based OCT system with an extended imaging range, using a common-path Fourier-domain optical coherence tomography (CP-FD-OCT) configuration. Using this OCT systems, OCT image was obtained from an onion, and their subsurface structure were observed. The result showed that the OCT images obtained using our motorized-stage-based system had a significantly extended imaging range due to its real-time accurate depth tracking. Consequently, the devised CP-FD-OCT systems and algorithms have good potential for the further development of endoscopic OCT for microsurgery.
{"title":"All-fiber common-path fourier-domain optical coherence tomography moving 2-axis based on active surface tracking algorithm","authors":"C. Song, K. S. Kim, M. H. Kim, S. Ryu, J. Seo, J. Kang","doi":"10.1109/ICAWST.2011.6163102","DOIUrl":"https://doi.org/10.1109/ICAWST.2011.6163102","url":null,"abstract":"Conventional optical coherence tomography (OCT) systems generally have a limited imaging range within a depth of only 1-2 mm and suffers from unwanted noise such as speckle, ghost or mirror noise. To overcome these limitations, we developed a motorized-stage-based OCT system with an extended imaging range, using a common-path Fourier-domain optical coherence tomography (CP-FD-OCT) configuration. Using this OCT systems, OCT image was obtained from an onion, and their subsurface structure were observed. The result showed that the OCT images obtained using our motorized-stage-based system had a significantly extended imaging range due to its real-time accurate depth tracking. Consequently, the devised CP-FD-OCT systems and algorithms have good potential for the further development of endoscopic OCT for microsurgery.","PeriodicalId":126169,"journal":{"name":"2011 3rd International Conference on Awareness Science and Technology (iCAST)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122099648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sound localization or direction of arrival (DOA) estimation plays a key role in awareness technologies since it can identify the coordinates of an unknown source. In this study, we present a new chip design, which is primarily based on the average magnitude difference function (AMDF), for reducing the hardware area and power consumption. Meanwhile, two novel hardware architectures with the folded architecture and circular buffer are also proposed in order to save unnecessary computation in this system, including short critical paths and simply control units of data access. The experimental results show that our proposed design can successfully enhance the operating frequency and reach higher performance. Furthermore, the accuracy rate of our system can achieve 90% with ±3° errors on average. The chip simulation result displays that the power consumption is approximately 1.3 mW, and the chip area is 0.998 mm2 with 0.18-µm CMOS process.
{"title":"An improvement of chip design for auditory source localization awareness","authors":"Jhing-Fa Wang, Chih-Hung Chou, Yingjia Huang, Po-Chuan Lin, Bo-Wei Chen","doi":"10.1109/ICAWST.2011.6163101","DOIUrl":"https://doi.org/10.1109/ICAWST.2011.6163101","url":null,"abstract":"Sound localization or direction of arrival (DOA) estimation plays a key role in awareness technologies since it can identify the coordinates of an unknown source. In this study, we present a new chip design, which is primarily based on the average magnitude difference function (AMDF), for reducing the hardware area and power consumption. Meanwhile, two novel hardware architectures with the folded architecture and circular buffer are also proposed in order to save unnecessary computation in this system, including short critical paths and simply control units of data access. The experimental results show that our proposed design can successfully enhance the operating frequency and reach higher performance. Furthermore, the accuracy rate of our system can achieve 90% with ±3° errors on average. The chip simulation result displays that the power consumption is approximately 1.3 mW, and the chip area is 0.998 mm2 with 0.18-µm CMOS process.","PeriodicalId":126169,"journal":{"name":"2011 3rd International Conference on Awareness Science and Technology (iCAST)","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115509754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-09-01DOI: 10.1109/ICAWST.2011.6163167
Yang Li, Min Han
An efficient case retrieval method and an adjustment strategy are proposed in this paper to build a case-based reasoning (CBR) system for oxygen calculation in Basic Oxygen Furnace (BOF) steelmaking. In the process of case retrieval, the Bayesian rough set technology is adopted to establish the weights of the case attributes. Then, the k nearest neighbors algorithm is implement to retrieval the most similar cases as a reference. The adjustment step executed by mixture of experts model is introduced to make up the gaps between current case's problem attributes and the retrieved case's. Finally, the parameters in mixture of experts model are optimized by Particle Swarm Optimization (PSO) method. Practical production data are used to test the CBR system. Using actual production data converter simulation Results show that proposed system is effective.
{"title":"Case-based reasoning system based on Bayesian rough set and hierarchical mixture of experts model","authors":"Yang Li, Min Han","doi":"10.1109/ICAWST.2011.6163167","DOIUrl":"https://doi.org/10.1109/ICAWST.2011.6163167","url":null,"abstract":"An efficient case retrieval method and an adjustment strategy are proposed in this paper to build a case-based reasoning (CBR) system for oxygen calculation in Basic Oxygen Furnace (BOF) steelmaking. In the process of case retrieval, the Bayesian rough set technology is adopted to establish the weights of the case attributes. Then, the k nearest neighbors algorithm is implement to retrieval the most similar cases as a reference. The adjustment step executed by mixture of experts model is introduced to make up the gaps between current case's problem attributes and the retrieved case's. Finally, the parameters in mixture of experts model are optimized by Particle Swarm Optimization (PSO) method. Practical production data are used to test the CBR system. Using actual production data converter simulation Results show that proposed system is effective.","PeriodicalId":126169,"journal":{"name":"2011 3rd International Conference on Awareness Science and Technology (iCAST)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121179538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-09-01DOI: 10.1109/ICAWST.2011.6163115
Yuki Murai, M. Okada, Kiyota Hashimoto
Any commercial sites, be it a hotel, a restaurant, or a shop, have to be reached properly by potential customers, and thus an adequate information on the route to the site is important. Route information is represented as a textual description and/or as a map, and in either case, adequate mentions of landmarks, a building or a site that is located in the midst of the route which plays an intermediate marker, are essential. However, human route descriptions or maps based on them may not contain a sufficient number of landmarks that is needed for potential customers, and an automatic determination of necessary landmarks is desirable. In this study, as a preliminary one, we collected more than thousands of route descriptions written by commercial sites, and made an extensive observation to find characteristics of textual route descriptions. Based on the observation, we conducted two experiments: to automatically extract potential landmarks from textual route descriptions and to evaluate the legitimacy of them using a simulative agent. The result indicates that more than half of the textual route descriptions accumulated needs improving, and the extracted potential landmarks can be effectively added for improving existing route descriptions.
{"title":"Characteristics of human route descriptions and their improvement by machine landmark extraction","authors":"Yuki Murai, M. Okada, Kiyota Hashimoto","doi":"10.1109/ICAWST.2011.6163115","DOIUrl":"https://doi.org/10.1109/ICAWST.2011.6163115","url":null,"abstract":"Any commercial sites, be it a hotel, a restaurant, or a shop, have to be reached properly by potential customers, and thus an adequate information on the route to the site is important. Route information is represented as a textual description and/or as a map, and in either case, adequate mentions of landmarks, a building or a site that is located in the midst of the route which plays an intermediate marker, are essential. However, human route descriptions or maps based on them may not contain a sufficient number of landmarks that is needed for potential customers, and an automatic determination of necessary landmarks is desirable. In this study, as a preliminary one, we collected more than thousands of route descriptions written by commercial sites, and made an extensive observation to find characteristics of textual route descriptions. Based on the observation, we conducted two experiments: to automatically extract potential landmarks from textual route descriptions and to evaluate the legitimacy of them using a simulative agent. The result indicates that more than half of the textual route descriptions accumulated needs improving, and the extracted potential landmarks can be effectively added for improving existing route descriptions.","PeriodicalId":126169,"journal":{"name":"2011 3rd International Conference on Awareness Science and Technology (iCAST)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130645343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-09-01DOI: 10.1109/ICAWST.2011.6163174
Wenchao Xu, T. Fei, Yanxiang Geng, Fang Bai, Liyi Zhang
This paper introduces a design of environmental information monitoring system based on embedded technology. The system equips an ARM7TDMI-based microprocessor and GPRS as its main controller; the system composition is described, and consists of the sensor data acquisition, remote transmission of short message service (SMS) and LCD displaying. Software processes with μC/OS-II is shown, and the method of realizing remote transmission by SMS is discussed in detail, the data collection, remote transmission and playing of environmental information are realized successfully.
{"title":"Design of environmental information monitoring system based on GPRS","authors":"Wenchao Xu, T. Fei, Yanxiang Geng, Fang Bai, Liyi Zhang","doi":"10.1109/ICAWST.2011.6163174","DOIUrl":"https://doi.org/10.1109/ICAWST.2011.6163174","url":null,"abstract":"This paper introduces a design of environmental information monitoring system based on embedded technology. The system equips an ARM7TDMI-based microprocessor and GPRS as its main controller; the system composition is described, and consists of the sensor data acquisition, remote transmission of short message service (SMS) and LCD displaying. Software processes with μC/OS-II is shown, and the method of realizing remote transmission by SMS is discussed in detail, the data collection, remote transmission and playing of environmental information are realized successfully.","PeriodicalId":126169,"journal":{"name":"2011 3rd International Conference on Awareness Science and Technology (iCAST)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131518007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-09-01DOI: 10.1109/ICAWST.2011.6163123
Qiang Zou
In order to reduce power consumption in disk-based storage systems, based on the definition of multiple power states, a lot of efforts focus on power consumption management mechanisms which can be developed to allow system software to control transitions between the power states. But, little work studies energy consumption and performance metrics of I/O systems through the transition probability among different disk modes. In this paper, we define the transition probability mathematically from active mode to idle mode, and propose a novel analytical approach to evaluate energy consumption and performance metrics, i.e., queue length, throughput, response time. Our proposed model might motivate storage researchers to exploit a quick analysis toolkit and give some insights for the design of power-aware storage systems.
{"title":"An analytical performance and power model based on the transition probability for hard disks","authors":"Qiang Zou","doi":"10.1109/ICAWST.2011.6163123","DOIUrl":"https://doi.org/10.1109/ICAWST.2011.6163123","url":null,"abstract":"In order to reduce power consumption in disk-based storage systems, based on the definition of multiple power states, a lot of efforts focus on power consumption management mechanisms which can be developed to allow system software to control transitions between the power states. But, little work studies energy consumption and performance metrics of I/O systems through the transition probability among different disk modes. In this paper, we define the transition probability mathematically from active mode to idle mode, and propose a novel analytical approach to evaluate energy consumption and performance metrics, i.e., queue length, throughput, response time. Our proposed model might motivate storage researchers to exploit a quick analysis toolkit and give some insights for the design of power-aware storage systems.","PeriodicalId":126169,"journal":{"name":"2011 3rd International Conference on Awareness Science and Technology (iCAST)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131097476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-09-01DOI: 10.1109/ICAWST.2011.6163103
Katsuko T. Nakahira, Miki Akahane, Yukiko Fukami
This paper focuses on simultaneous piano playing and singing, which is considered to fall in the field of physical skills. The authors previously proposed and implemented an educational approach that makes use of multimedia learning materials and annotated musical scores. In order to clarify the roles of these materials, this paper discusses how learners acquire a physical skill in an educational approach that makes use of only annotated musical scores. The paper reveals that there is a limit to the effectiveness of using only annotated musical scores to acquire such a physical skill, and that multimedia materials are also important for the effective development of physical skills.
{"title":"Awareness promoting learning design of sing-along piano playing - the role of annotated musical score and multimedia contents","authors":"Katsuko T. Nakahira, Miki Akahane, Yukiko Fukami","doi":"10.1109/ICAWST.2011.6163103","DOIUrl":"https://doi.org/10.1109/ICAWST.2011.6163103","url":null,"abstract":"This paper focuses on simultaneous piano playing and singing, which is considered to fall in the field of physical skills. The authors previously proposed and implemented an educational approach that makes use of multimedia learning materials and annotated musical scores. In order to clarify the roles of these materials, this paper discusses how learners acquire a physical skill in an educational approach that makes use of only annotated musical scores. The paper reveals that there is a limit to the effectiveness of using only annotated musical scores to acquire such a physical skill, and that multimedia materials are also important for the effective development of physical skills.","PeriodicalId":126169,"journal":{"name":"2011 3rd International Conference on Awareness Science and Technology (iCAST)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115540349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-09-01DOI: 10.1109/ICAWST.2011.6163158
Kefeng Wang, Xu Xu, Chonghui Guo
Independent Component Analysis (ICA) is an effective method to solve the problem of Blind Source Separation (BSS). In this paper, a new algorithm is proposed to separate signals mixtured by sub-Gaussian, super-Gaussian, symmetric and asymmetric sources. Alternative score functions in the algorithm are derived by using exponent density model and Gaussian parametric density mixture model. The score functions are selfadaptive through estimating the high-order moments of original signals. Moreover, a stability condition for the proposed algorithm is given to guarantee separating the true solution. Simulations are presented to illustrate the performance and effectiveness of the proposed algorithm.
{"title":"A stable ICA algorithm based on exponent density and Gaussian parametric density mixture models","authors":"Kefeng Wang, Xu Xu, Chonghui Guo","doi":"10.1109/ICAWST.2011.6163158","DOIUrl":"https://doi.org/10.1109/ICAWST.2011.6163158","url":null,"abstract":"Independent Component Analysis (ICA) is an effective method to solve the problem of Blind Source Separation (BSS). In this paper, a new algorithm is proposed to separate signals mixtured by sub-Gaussian, super-Gaussian, symmetric and asymmetric sources. Alternative score functions in the algorithm are derived by using exponent density model and Gaussian parametric density mixture model. The score functions are selfadaptive through estimating the high-order moments of original signals. Moreover, a stability condition for the proposed algorithm is given to guarantee separating the true solution. Simulations are presented to illustrate the performance and effectiveness of the proposed algorithm.","PeriodicalId":126169,"journal":{"name":"2011 3rd International Conference on Awareness Science and Technology (iCAST)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124742351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-09-01DOI: 10.1109/ICAWST.2011.6163192
A. Doi, H. Takahashi, T. Mawatari, S. Mega
In this paper, we present the development of a high-speed volume rendering system that combines 3D texture compression and parallel programming techniques for rendering multiple high-resolution 3D images obtained with medical or industrial CT. The 3D texture compression algorithm (DXT5) provides extremely high efficiency since it reduces the memory consumption to 1/4 of the original without having a negative impact on the image quality or display speed. By using this approach, it is possible to use personal computers with general-purpose graphics capabilities to display high-resolution 3D images or groups of multiple 3D images obtained with medical or industrial CT in real time.
{"title":"Development of a volume rendering system using 3D texture compression techniques on general-purpose personal computers","authors":"A. Doi, H. Takahashi, T. Mawatari, S. Mega","doi":"10.1109/ICAWST.2011.6163192","DOIUrl":"https://doi.org/10.1109/ICAWST.2011.6163192","url":null,"abstract":"In this paper, we present the development of a high-speed volume rendering system that combines 3D texture compression and parallel programming techniques for rendering multiple high-resolution 3D images obtained with medical or industrial CT. The 3D texture compression algorithm (DXT5) provides extremely high efficiency since it reduces the memory consumption to 1/4 of the original without having a negative impact on the image quality or display speed. By using this approach, it is possible to use personal computers with general-purpose graphics capabilities to display high-resolution 3D images or groups of multiple 3D images obtained with medical or industrial CT in real time.","PeriodicalId":126169,"journal":{"name":"2011 3rd International Conference on Awareness Science and Technology (iCAST)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117322510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2011-09-01DOI: 10.1109/ICAWST.2011.6163116
Zhenwei Shi, Zhen Qin, Shuo Yang, Zhi-guo Jiang
Nowadays the detection in space environment is definitely a hot spot in the whole world. Developing the technique of multiple materials detection makes great sense. In this paper, we propose an algorithm for spatial multiple materials detection in hyperspectral images. The detection problem is a semi-blind signal extraction problem. As the prior knowledge, the spectra of target materials are known in advance. The proposed detection algorithm, multiple materials detector (MMD), exploits spectral information exclusively to make decisions by considering that the type of each pixel contains the interesting materials or not, which is a semi-blind signal extraction method. With this method, after single time detection of a hyperspectral image, the multiple materials spectra input before could be exactly detected. Compared with classical detection methods, the proposed detection method has three superiorities. Firstly, it functions well when there are various kinds of interesting materials needing to be detected. Secondly, because of using regularization items the algorithm is robust in spectral variability and noise. Lastly, no matter how the interesting materials distribute in the hyperspectral image, it works steadily. Experimental results based on a set of hyperspectral images of Hubble Space Telescope prove the effectiveness of the MMD algorithm.
{"title":"Spatial multiple materials detection in hyperspectral imagery","authors":"Zhenwei Shi, Zhen Qin, Shuo Yang, Zhi-guo Jiang","doi":"10.1109/ICAWST.2011.6163116","DOIUrl":"https://doi.org/10.1109/ICAWST.2011.6163116","url":null,"abstract":"Nowadays the detection in space environment is definitely a hot spot in the whole world. Developing the technique of multiple materials detection makes great sense. In this paper, we propose an algorithm for spatial multiple materials detection in hyperspectral images. The detection problem is a semi-blind signal extraction problem. As the prior knowledge, the spectra of target materials are known in advance. The proposed detection algorithm, multiple materials detector (MMD), exploits spectral information exclusively to make decisions by considering that the type of each pixel contains the interesting materials or not, which is a semi-blind signal extraction method. With this method, after single time detection of a hyperspectral image, the multiple materials spectra input before could be exactly detected. Compared with classical detection methods, the proposed detection method has three superiorities. Firstly, it functions well when there are various kinds of interesting materials needing to be detected. Secondly, because of using regularization items the algorithm is robust in spectral variability and noise. Lastly, no matter how the interesting materials distribute in the hyperspectral image, it works steadily. Experimental results based on a set of hyperspectral images of Hubble Space Telescope prove the effectiveness of the MMD algorithm.","PeriodicalId":126169,"journal":{"name":"2011 3rd International Conference on Awareness Science and Technology (iCAST)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122992259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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