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IEEE Asia Pacific Conference on Circuits and Systems

作者： Kuan-Ju Chen Chin-Hung Peng Feipei Lai Department of Electrical Engineering Department of Computer Science and Information Engineering Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University

ISBN: (纸本)9781424474547

The 2D mesh network on chip (NOC) is a popular NOC topology because of network scalability and the use of a simple routing algorithm. However, the long distance traffic may suffer from high transmission latency. In this paper, we propose an improved design called the star-type architecture in which the long distance traffic is allowed to traverse an additional second-level mesh. Simulation results demonstrate that the proposed design can reduce the number of hops traversed for long distance traffic. A 12 × 12 star-type NOC shows performance improvements of 17.2% and 10.3% in comparison with the normal 2D mesh and level-2 mesh architectures, respectively.

关键词： Network on chip Star type Mesh Low latency Deadlock-free

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Real-time emotional speech processing for neurorobotics applications

Real-time emotional speech processing for neurorobotics appl...

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23rd International Conference on computer Applications in Industry and engineering 2010, CAINE 2010 - Including SNA 2010 Workshop

作者： Thibeault, C.M. Sessions, O. Goodman, P.H. Harris Jr., F.C. Department of Electrical and Biomedical Engineering University of Nevada Reno Reno NV United States Department of Computer Science University of Nevada Reno Reno NV United States Brain Computation Lab. University of Nevada Reno Reno NV United States Department of Internal Medicine and Program in Biomedical Engineering University of Nevada Reno Reno NV United States

ISBN: (纸本)9781617820267

The ability for humans to understand and process the emotional content of speech is unsurpassed by simulated intelligent agents. Beyond the linguistic content of speech are the underlying prosodic features naturally understood by humans. The goal of emotional speech processing systems is to extract and classify human speech for these so called paralinguistic elements. Presented here is a proof-of-concept system designed to analyze speech in real-time for coupled interactions with spiking neural models. Based on proven feature extraction algorithms, the resulting system provides two interface options to running simulations on the NeoCortical Simulator. Some basic tests using new recordings as well as a subset from a published emotional database were completed with promising results.

关键词： Speech processing

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Dilatometric study of ferroelectric Rb2CdI4 monoclinic crystal grown by czochralski method

Dilatometric study of ferroelectric Rb2CdI4 monoclinic cryst...

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12th International Meeting on Ferroelectricity, IMF-12 and the 18th IEEE International Symposium on Applications of Ferroelectrics, ISAF-18

作者： Yamaguchi, T. Gotou, S. Miyoshi, T. Kasano, H. Mitsui, T. Kurihama, T. Shimizu, F. Takashige, M. Department of Electrical Engineering School of Science and Engineering Meisei University Hino-shi Tokyo 191-8506 Japan Electrical Engineering Graduate School of Science and Engineering Meisei University Hino-shi Tokyo 191-8506 Japan Department of Physics Graduate School of Science and Engineering Yamaguchi University Yamaguchi-shi Yamaguchi 753-8512 Japan Laboratory of Developmental Program Faculty of Pharmaceutical Sciences Teikyo University Sagamihara-shi Kanagawa 229-0195 Japan Department of Electronics and Information Engineering College of Engineering Chubu University Kasugai-shi Aichi 487-8501 Japan Department of Electronics and Computer Science College of Science and Engineering Iwaki Meisei University Iwaki-shi Fukushima 970-8551 Japan

Crystal growth of Rb2CdI4 was performed by Czochralski method. Transparent colourless crystals with monoclinic structure were obtained. Temperature dependence of the dielectric constant along the b-axis was measured with variation of frequency. The thermal expansions x i (i = a, b, c and a′;a′ = a + c) along the four independent axes were measured both by clip-type strain-gauge dilatometer and X-ray diffraction methods. These results show distinct anomalies associated with the ferroelectric transition at TC= 210 K. Copyright © 2010 Taylor & Francis Group, LLC.

关键词： X ray diffraction

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A portable, inexpensive, wireless vital signs monitoring system

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biomedical Instrumentation and Technology 2010年第4期44卷 350-353页

作者： Kaputa, David Price, David Enderle, John D. Biomedical Engineering University of Connecticut Storrs CT United States Abiomed Danvers MA United States Biomedical Engineering Program Department of Electrical and Computer Engineering University of Connecticut United States

The University of Connecticut, department of biomedical engineering has developed a device to be used by patients to collect physiological data outside of a medical facility. This device facilitates modes of data collection that would be expensive, inconvenient, or impossible to obtain by traditional means within the medical facility. Data can be collected on specific days, at specific times, during specific activities, or while traveling. The device uses biosensors to obtain information such as pulse oximetry (SpO2), heart rate, electrocardiogram (ECG), non-invasive blood pressure (NIBP), and weight which are sent via Bluetooth to an interactive monitoring device. The data can then be downloaded to an electronic storage device or transmitted to a company server, physician's office, or hospital. The data collection software is usable on any computer device with Bluetooth capability, thereby removing the need for special hardware for the monitoring device and reducing the total cost of the system. The modular biosensors can be added or removed as needed without changing the monitoring device software. The user is prompted by easy-to-follow instructions written in non-technical language. Additional features, such as screens with large buttons and large text, allow for use by those with limited vision or limited motor skills.

关键词： Blood pressure

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Photoluminescence of CdSe/ZnS quantum dots in GaN/quantum dots/GaN wafer bonded system

Photoluminescence of CdSe/ZnS quantum dots in GaN/quantum do...

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作者： Li, Y. Giles, A. Stokes, E. Optical Science and Engineering Graduate Program Department of Physics and Optical Science University of North Carolina at Charlotte 9201 University City Boulevard Charlotte NC 28223 United States Nanoscale Science Graduate Program Department of Chemistry University of North Carolina at Charlotte 9201 University City Boulevard Charlotte NC 28223 United States Department of Electrical and Computer Engineering University of North Carolina at Charlotte 9201 University City Boulevard Charlotte NC 28223 United States

ISBN: (纸本)9781607681908

Wafer bonding technology is applied to the GaN/quantum dots/GaN system, where CdSe/ZnS Quantum Dots serve as both the active layer and the binding layer. Photoluminescence is observed from quantum dots following wafer bonding at various temperatures under ultra high vacuum condition. Temperature dependences of bond strength and photoluminescence properties are characterized. Annealing at elevated temperature to form wafer bonds degrades photoluminescence intensity and slightly blue shifts the wavelength. Transmission Electron Microscopy is applied to study the physical properties of vacuum annealed QDs, in which agglomeration is observed. ©The Electrochemical Society.

关键词： Gallium nitride

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Virtual and augmented medical imaging environments: Enabling technology for minimally invasive cardiac interventional guidance

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IEEE Reviews in biomedical engineering 2010年 3卷 25-47页

作者： Linte, Cristian A. White, James Eagleson, Roy Guiraudon, Grard M. Peters, Terry M. Biomedical Engineering Graduate Program University of Western Ontario Robarts Research Institute London ON N6A 5K8 Canada Imaging Research Laboratories Robarts Research Institute London Health Sciences Centre London ON N6A 5A5 Canada Department of Electrical and Computer Engineering University of Western Ontario Canadian Surgical Technologies and Advanced Robotics London ON N6A 5B9 Canada Canadian Surgical Technologies and Advanced Robotics London ON N6A 5A5 Canada

Virtual and augmented reality environments have been adopted in medicine as a means to enhance the clinician's view of the anatomy and facilitate the performance of minimally invasive procedures. Their value is truly appreciated during interventions where the surgeon cannot directly visualize the targets to be treated, such as during cardiac procedures performed on the beating heart. These environments must accurately represent the real surgical field and require seamless integration of pre- and intra-operative imaging, surgical tracking, and visualization technology in a common framework centered around the patient. This review begins with an overview of minimally invasive cardiac interventions, describes the architecture of a typical surgical guidance platform including imaging, tracking, registration and visualization, highlights both clinical and engineering accuracy limitations in cardiac image guidance, and discusses the translation of the work from the laboratory into the operating room together with typically encountered challenges. © 2008 IEEE.

关键词： Augmented reality

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PDMS stretchable platforms for the studies of mechanical compression on neurogenesis

PDMS stretchable platforms for the studies of mechanical com...

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IEEE International Conference on Nano/Molecular Medicine and engineering (NANOMED)

作者： Leyla Esfandiari William C Tang Biomedical Engineering Interdepartmental Program University of California Los Angeles CA USA Department of Electrical Engineering and Computer Science University of California Irvine CA USA

The use of MEMS to study the effect of mechanical compression on neurogenesis has been demonstrated. Polydimethylsiloxane-(PDMS)-based stretchable platforms were used on neurosphere assay to investigate the role of mechanical forces on the formation of radial glial processes, neuronal generation and migration. To induce mechanical compression on neurospheres, The PDMS culturing substrate is patterned with micron-sized wells. Neurospheres are cultured on the prestretched device. After 48 hours, when neurospheres are grown to the size of the well's width, the stretched substrate is released. The experimental results showed that applied mechanical compression on neural stem cells cultured as neurospheres could be a factor accelerating the radial glial formation, which is associated to neurogenesis and neuronal migration.

关键词： Neurons Image coding Stem cells Substrates Embryo Fluorescence Biomembranes

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Improving the signal to noise ratio of event-related EEG signals in high risk newborns

Improving the signal to noise ratio of event-related EEG sig...

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Biennial Symposium on Communications, QBSC

作者： Timothy Falkner Ali Abedi Marie Hayes Jonathan Paul Electrical and Computer Engineering Department University of Maine Orono ME USA Graduate School of Biomedical Sciences University of Maine Orono ME USA

A soft thresholding technique is used in an attempt to improve the accuracy of signals with low signal-to-noise ratios (SNR). Focusing initially on EEG signals from high-risk infants, the technique has provided us wit... 详细信息

ISBN: (纸本)9781424457090;9781424457113

关键词： Signal to noise ratio Electroencephalography Pediatrics Enterprise resource planning Signal processing biomedical measurements Extraterrestrial measurements Time measurement Scalp Astrophysics

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Chi-Huang Chen Sheau-Ling Hsieh Yung-Ching Weng Wen-Yung Chang Feipei Lai Department of Electrical Engineering National Taiwan University Taipei Taiwan EECS International Graduate Program Institute IT Center National Chiao Tung University Hsinchu Taiwan Department of Computer Science and Engineering National Taiwan University Taiwan Institute of Computer Science and Engineering College of Computer Science National Chiao Tung University Taiwan Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taiwan

Semantic similarity measure plays an essential role in Information Retrieval and Natural Language Processing. In this paper we propose a page-count-based semantic similarity measure and apply it in biomedical domains. Previous researches in semantic web related applications have deployed various semantic similarity measures. Despite the usefulness of the measurements in those applications, measuring semantic similarity between two terms remains a challenge task. The proposed method exploits page counts returned by the Web Search Engine. We define various similarity scores for two given terms P and Q, using the page counts for querying P, Q and P AND Q. Moreover, we propose a novel approach to compute semantic similarity using lexico-syntactic patterns with page counts. These different similarity scores are integrated adapting support vector machines, to leverage the robustness of semantic similarity measures. Experimental results on two datasets achieve correlation coefficients of 0.798 on the dataset provided by A. Hliaoutakis, 0.705 on the dataset provide by T. Pedersen with physician scores and 0.496 on the dataset provided by T. Pedersen et al. with expert scores.

关键词： Semantics biomedical measurements Correlation Kernel Training Medical services Support vector machine classification

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Statistical analysis of retinal tomographic pseudo images for diagnostic purpose

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Journal of Mathematical Modelling and Algorithms 2010年第3期9卷 257-273页

作者： Bruni, C. de Juan, J. Ferrone, C. Giannini, D. Grzywacz, N.M. Huang, D. Koch, G. Russo, V. Tan, O. D.I.S. Department University La Sapienza 00185 Rome Via Ariosto 25 Italy Department of Biotechnology University of Alicante Alicante Spain Departments of Biomedical and Electrical Engineering Neuroscience Graduate Program Center for Vision Science and Technology University of Southern California Los Angeles United States Department of Ophthalmology and Doheny Eye Institute University of Southern California Los Angeles United States

The majority of visual impairments are related to retinal disorders. Therefore, techniques useful for early detection of retinal anomalies are of great interest for diagnosis and treatment of related pathologies. Optical Coherence Tomography (OCT) is a non-invasive technique that is becoming increasingly important in the analysis of human retina. This technique produces sections of a three dimensional reflectance map, which are pseudo-images of the retinal structure. In these pseudo-images, early pathologies may produce local modifications of reflectance, which visually, appear as blots. Consequently, automatic procedures for detection of such blots may be of help in the diagnosis of many retinal diseases. Due to the complexity of the measurement technique and of the retinal structure, the pseudo-images produced by OCT can be modeled as 2D random signals: the above pathological blots correspond to sudden changes in the distribution of such OCT signals. In this work, we performed a statistical analysis of retinal OCT data. We found that the so-called stretched-exponential distribution, a two-parameter probability density function, provides a model that describes the data in a satisfactory way. In addition, we analyzed spatial-reflectance interdependence by studying the autocorrelation function;this analysis showed a significant correlation between contiguous pixels about 5 μm apart. We then developed a procedure to obtain the maximum-likelihood estimate of distribution parameters along the retinal pseudo-image. With this procedure, we analyzed their spatial dependence both along and across retinal layers. We observed that along suitable thin layers, the two parameters were statistically constant. By exploiting this result, a statistical procedure was developed for automatic detection of parameter variations due to retinal pathological blots. Some first results are reported for detection of diabetic retinopathy. © 2010 Springer Science+Business Media B.V.

关键词： Diabetic retinopathy Optical coherence tomography Retinal pseudo-images Statistical analysis

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