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Optics: Large-Field-of-View Wide-Spectrum Artificial Reflecting Superposition Compound Eyes (Small 15/2014)

Small 2014年第15期10卷

作者： Chi-Chieh Huang Xiudong Wu Hewei Liu Bader Aldalali John A. Rogers Hongrui Jiang Department of Electrical and Computer Engineering University of Wisconsin – Madison Madison WI 53706 USA Department of Materials Science and Engineering Beckman Institute for Advanced Science and Technology and Frederick Seitz Materials Research Laboratory University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA Department of Electrical and Computer Engineering McPherson Eye Research Institute Materials Science Program Department of Biomedical Engineering University of Wisconsin – Madison Madison WI 53706 USA

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Novel automatic posture detection for in-patient care using IMU sensors

Novel automatic posture detection for in-patient care using ...

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IEEE Conference on Robotics, Automation and Mechatronics

作者： Vo Nhat Nguyen Haoyong Yu Department of Electrical Engineering and School of Computer Science National University of Singapore Singapore Department of Bioengineering National University of Singapore Singapore

Posture detection using Inertia Measurement Unit (IMU) has recently attracted great interests in healthcare research community. However, very few studies focus on the applications of this technology in the care of inpatients. This specific group of users, who are moderately to severely ill, have a distinct set of postures and activities that require special attentions and continuous monitoring from clinicians. In this paper, we present a novel methodology for automatic detection of postures for hospitalized patients using two wearable IMU sensors, with tri-axial accelerometers, attached at the chest and the abdomen respectively. The data were collected from participants who were carefully instructed to perform activities and attain postures that simulate those of hospitalized patients in real life. From the data retrieved, we performed orientation analysis for acceleration vectors and transition analysis for transitional activities between various postures. Both rule-based detection and Artificial Neural Network (ANN) for transition recognition achieved high accuracy. The results also showed that a combination of orientation and transition study could enhance the robustness of the detection algorithm. Due to its efficiency and simplicity, the proposed method could find its way into many applications that aim to improve the current state of inpatient healthcare.

关键词： Decision support systems Conferences Robots Automation Mechatronics Random access memory

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Analysis of poultry vocalizations for age estimation using cepstral coefficients and C4.5 classification

Analysis of poultry vocalizations for age estimation using c...

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American Society of Agricultural and Biological Engineers Annual International Meeting 2013

作者： Parrish, N.V. Anderson, D.V. Daley, W.D.R. Britton, D.F. Harbert, S. Webster, A.B. Ritz, C.W. School of Electrical and Computer Engineering Georgia Institute of Technology United States Agricultural Technology Research Program Georgia Tech. Research Institute United States Poultry Science Department University of Georgia United States

ISBN: (纸本)9781627486651

Poultry scientists and researchers have been studying the possibility of identifying bird stress from the vocal patterns of broiler flocks. Being able to identify stress or sickness in a flock can lead to early interventions. However, as the flock ages, the vocal properties change. This paper presents the preliminary results of an age classification technique using the C4.5 decision three algorithm using Mel-frequency cepstral coefficients (MFCCs), audio frequencies commonly used from speech processing. Sound data was collected continuously over a 61-day period. The flock was composed of 400 Cobb500™ broilers raised under research conditions mimicking commercial operations. Results of the data processing and the C4.5 classification indicate that age can be determined within one day of error with 70% frequency. This process of determining age of a flock is intended to be the first step in a larger comprehensive system for identifying the condition of the flock and assessing animal welfare.

关键词： Animals

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Software engineering Education via the Use of Corporate-Sponsored Projects: A Panel Discussion of the Approaches, Benefits, and Challenges for Industry-Academic Collaboration

Software Engineering Education via the Use of Corporate-Spon...

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IEEE Conference on Software engineering Education and Training

作者： Linda Werner Geoff Kuenning Mark Sebern James Vallino W. Eric Wong Department of Computer Science Senior Design Projects Program Jack Baskin School of Engineering University of California Department of Computer Science Clinic Program Harvey Mudd College Department of Electrical Engineering and Computer Science Software Engineering Program Milwaukee School of Engineering Department of Software Engineering Senior Projects Program Rochester Institute of Technology Department of Computer Science Software Engineering Project University of Texas at Dallas

ISBN: (纸本)9781467351386

In this panel, we will address questions regarding the development and execution of one type of industry-academic collaboration - corporate-sponsored projects. As representatives of programs at both public and private institutions, we will address a set of questions related to these programs. We have prepared an initial list that will be augmented with questions submitted and voted on by conference participants in advance of the session. After we have presented our prepared responses, the balance of the session will be dedicated to open discussion with audience members.

关键词： Device Panel engineering education Software engineering Legislators Legal Executions advance Debates Education

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Deformation of porous, nanostructured silver at room temperature and 150C°

Deformation of porous, nanostructured silver at room tempera...

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2012 MRS Fall Meeting

作者： Noiseau, Guillaume Becker, Michael F. Keto, John W. Kovar, Desiderio Materials Science and Engineering Graduate Program University of Texas at Austin Austin TX 78712-1591 United States Department of Electrical and Computer Engineering University of Texas Austin TX United States Department of Physics University of Texas Austin TX United States Department of Mechanical Engineering University of Texas Austin TX United States

ISBN: (纸本)9781632661067

Porous, nanostructured silver samples were produced using a direct-write method where a nanoparticle aerosol consisting of particles with a mean size of approximately 5 nm were accelerated to speeds of approximately 1000 m/sec and impacted onto a translating substrate [1]. The impacting particles have sufficient energy to stick to the substrate, allowing patterned thick films to be directly written from the aerosol without a mask. Unlike other low temperature processing routes for achieving patterned films, no organics are added that can interfere with post-deposition processing. Typical films are 5-100 μm thick, up to several centimeters long, and have an as-deposited relative densities as high as 70% of bulk Ag. Compression tests were carried out in steps at room temperature and at 150°C under constant displacement rates. Local strain and densification were measured by optical profilometry between each compression step. The results can be used as a starting point to better understand the mechanisms that govern plasticity, creep, and sintering in nanostructured, porous silver at low processing temperatures. © 2013 Materials Research Society.

关键词： Room temperature

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Rapid spectral domain multiplex localization

Rapid spectral domain multiplex localization

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Computational Optical Sensing and Imaging, COSI 2013

作者： Dijk, Thomas van Mayerich, David Bhargava, Rohit Scott Carney, P. Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign United States Department of Bioengineering University of Illinois at Urbana-Champaign United States Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign 405 N Mathews Ave Urbana Il 61801 United States

We present a method to dynamically image structures at nanometer spatial resolution with far-field instruments. We propose the use of engineered nanoprobes with distinguishable spectral responses and the measurement o... 详细信息

ISBN: (纸本)9781557529756

关键词： Coherent scattering

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Fast electrical Control of Single Electron Spins in Quantum Dots with Vanishing Influence from Nuclear Spins

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Physical Review Letters 2014年第26期113卷 267601-267601页

作者： J. Yoneda T. Otsuka T. Nakajima T. Takakura T. Obata M. Pioro-Ladrière H. Lu C. J. Palmstrøm A. C. Gossard S. Tarucha Department of Applied Physics University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan RIKEN Center for Emergent Matter Science Hirosawa 2-1 Wako-shi Saitama 351-0198 Japan Département de Physique Université de Sherbrooke Sherbrooke Québec J1K 2R1 Canada CIFAR Program in Quantum Information Science Canadian Institute for Advanced Research (CIFAR) Toronto Ontario M5G 1Z8 Canada Materials Department University of California Santa Barbara California 93106 USA Electrical and Computer Engineering University of California Santa Barbara California 93106 USA

We demonstrate fast universal electrical spin manipulation with inhomogeneous magnetic fields. With fast Rabi frequency up to 127 MHz, we leave the conventional regime of strong nuclear-spin influence and observe a spin-flip fidelity >96%, a distinct chevron Rabi pattern in the spectral-time domain, and a spin resonance linewidth limited by the Rabi frequency, not by the dephasing rate. In addition, we establish fast z rotations up to 54 MHz by directly controlling the spin phase. Our findings will significantly facilitate tomography and error correction with electron spins in quantum dots.

关键词： Error correction

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Branched Nanowire Heterostructures for Efficient and Durable Solar-Driven Hydrogen Production

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ECS Meeting Abstracts 2014年第17期MA2014-01卷

作者： Alireza Kargar Sung Joo Kim Chulmin Choi Paniz Allameh Huisu Jeong Gun Young Jung Sungho Jin Xiaoqing Pan Deli Wang University of California - San Diego Department of Materials Science and Engineering University of Michigan Ann Arbor Materials Science and Engineering Program University of California-San Diego Department of Electrical and Computer Engineering University of California-San Diego School of Materials Science and Engineering Gwangju Institute of Science and Technology Qualcomm Institute (QI) University of California-San Diego

Branched nanowire (NW) heterostructures have recently been attracted considerable attention for solar water splitting and clean hydrogen production due to their unique properties such as nanoscale integration of different functional materials, greatly enhanced junction and surface area, enhanced gas evolution efficiency, broadband light absorption, etc. Moreover, branched NWs can be fabricated using facile and scalable fabrication methods such as hydrothermal or solvothermal growth methods. In this presentation, we show branched NWs of different compositions for core (or trunk) and branch NWs which were fabricated with facile and low-cost synthesis methods using cheap, non-toxic, and earth abundant materials including Si, CuO, Cu2O, ZnO, TiO2, and Fe2O3. The branched NW structures and the heterostructures' interfaces are investigated in detail using different characterization techniques such as SEM/HRSEM, TEM/HRTEM, STEM/HRSETM, etc. The photoelectrochemical (PEC) performances including photocurrent turn-on potential, photocurrent, solar conversion efficiency, and incident photon-to-current efficiency (IPCE) are studied systematically and optimized, based on different core and branch NW dimensions, for each specific branched NW heterostructure to provide efficient water splitting in a neutral medium. The electrode stability of different branched NWs is also investigated and long-term stability of over one day or several hours using a thin passivation layer or robust branched NWs are presented. The achieved results pave the way for accomplishing spontaneous overall solar water splitting for clean, efficient, cost-effective and durable solar hydrogen generation at large scales.

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Circulating tumor cell (CTC) enrichment: Ultra high throughput processing of clinically relevant blood volumes using a multiplexed spiral biochip

Circulating tumor cell (CTC) enrichment: Ultra high throughp...

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17th International Conference on Miniaturized Systems for Chemistry and Life sciences, MicroTAS 2013

作者： Warkiani, M.E. Khoo, B.L. Tan, D.S.W. Bhagat, A.A.S. Lim, W.T. Han, J. Lim, C.T. Centre Singapore Singapore Mechanobiology Institute National University of Singapore Singapore Singapore Department of Medical Oncology National Cancer Centre Singapore Singapore Singapore ClearbridgeBioMedics Pte Ltd Singapore Singapore Department of Bioengineering National University of Singapore Singapore Singapore Department of Electrical Engineering and Computer Science Department of Biological Engineering Massachusetts Institute of Technology Cambridge MA United States

ISBN: (纸本)9781632666246

Detection and characterization of circulating tumor cells (CTCs) from minimally invasive "liquid biopsy" provides critical insights into tumor biology and is critical for companion diagnostics and care. Here, we present a multiplexed spiral biochip for ultra-high throughput isolation of CTCs using inertial microfluidics to realize a single step label-free enrichment process. This device is capable of efficient cell separation of clinically relevant blood volumes in a short period of time (7.5 mL blood in 35 min). CTCs were successfully detected and isolated from 100% (50/50) blood samples collected from patients with advanced stage metastatic breast and lung cancer. They were identified under immunofluorescence assays (cytokeratin positive), as well as molecular probes (EGFR or HER2 positive). CTC recovery rate ranges from 3-1535 CTCs/mL and obtained under high purity (1 CTC for every 30-100 white blood cells detected). Retrieved cells are unlabelled and hence more viable for propagation, drug development and other downstream analysis.

关键词： Biochips

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Tracking chronically recorded single-units in cortically controlled brain machine interfaces

Tracking chronically recorded single-units in cortically con...

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International IEEE/EMBS Conference on Neural engineering, CNE

作者： Ahmed Eleryan Mukta Vaidya Joshua Southerland Islam Badreldin Karthikeyan Balasubramanian Andrew Fagg Nicholas Hatsopoulos Karim Oweiss Department of Electrical and Computer Engineering Michigan State University MI USA Committee of Computational Neuroscience University of Chicago IL USA Department of Computer Science and Bioengineering University of Oklahoma OK USA Cognitive Science Program Michigan State University MI USA

Multiple single-units recorded from chronically-implanted microelectrode arrays frequently exhibit variability in their spike waveform features and firing characteristics, making it challenging to ascertain the identity of recorded neurons across days. In this study, we present a fast and efficient algorithm that tracks multiple single-units, recorded in a nonhuman primate performing brain control of a robotic arm, across days based on features extracted from units' average waveforms. Furthermore, the algorithm does not require long recording duration to perform the analysis and can be applied at the start of each recording session without requiring the subject to be engaged in a behavioral task. The algorithm achieves a classification accuracy of up to 92% compared to experts' manual tracking.

关键词： Feature extraction Support vector machines Training Neurons Measurement Educational institutions Niobium

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