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Now showing items 17 - 32 of 1188

  • Apparatus and methods of displaying messages for electronic devices

    An apparatus of transmitting messages from an electronic device and display it on a mobile device, and a method of doing the same are disclosed. An exemplifying electronic device has an encoder to encode the data and a drive to modulate the signals into temporal and spatial light patterns according to the transmitted message. The light signals are then emitted from a group of LEDs on the electronic device. A video camera on a mobile device captures the light signals in the form of temporal and spatial patterns. A software application decodes the message and displays the message on the mobile device screen.
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  • Multichannel UWB-based radar life detector and positioning method thereof

    A multichannel UWB-based radar life detector includes a transmitting antenna and three receiving antennas for forming three radar echo signal channels. A 2-dimensional positioning method thereof includes: a1) amplifying weak life signals of stationary human by the channels, providing an 8-point integration method with an interval of 4 points to radar echo signals by distance; then breaking the integrated signals for decomposition and reconstruction in such a manner that target echo signals and three distance signals are formed; providing digital filtering and differential to the target echo signals for amplifying the weak but useful life signals; a2) 1-dimensionally distinguishing the signals by distance, analyzing spatial frequency according to the filtered and differentiated target echo signals as well as the distance signals for obtaining three target projection signals in the three channels; and a3) identifying the 2-dimensional position information of the targets according to the projection signals, forming an image.
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  • Do patients benefit from tourniquet in arthroscopic surgeries of the knee?

    Yang Zhang   Le Li   Jian Wang   Zhi-han Li…  

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  • A prediction model for N2 disease in T1 non-small cell lung cancer

    Yang Zhang   MDa   Yihua Sun   MDa   Jiaqing Xiang   MDa   Yawei Zhang   MDa   Hong Hu   MDa   Haiquan Chen   MDa  

    | Figures/TablesFigures/Tables | ReferencesReferencesObjectiveControversy remains over the routine use of mediastinoscopy or positron emission tomography in T1 non-small cell lung cancer without lymph node enlargement on computed tomography because the risk of N2 involvement is comparatively low. We aimed to develop a prediction model for N2 disease in cT1N0 non-small cell lung cancer to aid in the decision-making process.MethodsWe reviewed the records of 530 patients with computed tomography-defined T1N0 non-small cell lung cancer who underwent surgical resection with systematic lymph node dissection. Correlations between N2 involvement and clinicopathologic parameters were assessed using univariate analysis and binary logistic regression analysis. A prediction model was built on the basis of logistic regression analysis and was internally validated using bootstrapping.ResultsThe incidence of N2 disease was 16.8%. Four independent predictors were identified in multivariate logistic regression analysis and included in the prediction model: younger age at diagnosis (odds ratio, 0.974; 95% confidence interval, 0.952-0.997), larger tumor size (odds ratio, 2.769; 95% confidence interval, 1.818-4.217), central tumor location (odds ratio, 3.204; 95% confidence interval, 1.512-6.790), and invasive adenocarcinoma histology (odds ratio, 3.537; 95% confidence interval, 1.740-7.191). This model shows good calibration (Hosmer-Lemeshow test: P?=?.784), reasonable discrimination (area under the receiver operating characteristic curve, 0.726; 95% confidence interval, 0.669-0.784), and minimal overfitting demonstrated by bootstrapping.ConclusionsWe developed a 4-predictor model that can estimate the probability of N2 disease in computed tomography-defined T1N0 non-small cell lung cancer. This prediction model can help to determine the cost-effective use of mediastinal staging procedures.
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  • Chamfered narrow side copper plate for mould with funnel-shaped curved surface

    A chamfered narrow side copper plate for a mold with a funnel-shaped curved surface has a working face contacting molten steel that includes a middle area and two chamfered areas, which are arranged at two sides. The working face has a funnel-shaped curved surface, which is larger at a top and smaller at a bottom. The chamfered narrow side copper plate for mold with funnel-shaped curved surface can ensure the uniformity of the cooling effect of the chamfered surface and enhance the service life of the narrow side copper plate.
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  • Modeling and prediction of conduction delay in an unmyelinated axon

    Yang Zhang   Dirk Bucher   Farzan Nadim  

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  • Synthesis and characterization of energetic GAP-b-PAEMA block copolymer

    Yang Zhang   Juan Zhao   Pan Yang   Shangjin He and Hengjian Huang  

    Energetic block copolymer of polyglycidylazide-b-poly (azidoethyl methacrylate) (GAP-b-PAEMA) was synthesized and characterized. Macroinitiator PECH-Br prepared via the reaction of 2-bromoisobutyryl bromide with hydroxyl-terminated polyepichlorohydrin (PECH-OH) was used to initiate the atom transfer radical polymerization (ATRP) of chloroethyl methacrylate (CEMA). After azidation of the resulting copolymer, energetic copolymer GAP-b-PAEMA was obtained. Increase in the molecular weight determined by gel permeation chromatograph (GPC) is in agreement with the formation of block copolymer. Fourier transform infrared spectroscopy (FTIR) shows that the chlorine groups in the block copolymer can be substituted by azide group easily. Thermogravimetric analysis (TGA) shows that degradation of GAP-b-PAEMA involves two steps: the instantaneous decomposition of the azide groups followed by progressive scission of the polymer backbone. From differential scanning calorimetry (DSC) analysis, the GAP-b-PAEMA copolymer exhibits two glass transition temperatures (Tg) at −18 and 36°C, suggesting that the synthesized copolymer is a thermoplastic elastomer. This research provides a new method for the synthesis of energetic polymer. POLYM. ENG. SCI., 2011.
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  • Jig assembly for orienting, sorting and selecting fastener nuts

    A jig assembly for selecting and presenting fastener nuts in the correct orientation, each fastener nut including a nut cap and an assembling portion formed on an end of the fastener nut. The diameter of the nut cap is larger than the diameter of the assembling portion. The jig assembly includes an electric cabinet, a jig bracket, a feed container, and a sorting tray. The feed container includes a selector with an opening. The width of the opening is equal to the height of the fastener nut, the first sidewall of the selector forms a plurality of restricting protrusions, and each two adjacent restricting protrusions cooperatively define a restricting groove therebetween. The width of each restricting groove is equal to the diameter of the assembling portion, thus only fastener nuts in the correct orientation are capable of passing through the selector to be collected in the sorting tray.
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  • Non-invasive blood glucose detection system based on conservation of energy method

    Yang Zhang   Jian-ming Zhu   Yong-bo Liang   Hong-bo Chen   Shi-min Yin   Zhen-cheng Chen  

    The most common method used for minimizing the occurrence of diabetes complications is frequent glucose testing to adjust the insulin dose. However, using blood glucose (BG) meters presents a risk of infection. It is of great importance to develop non-invasive BG detection techniques. To realize high-accuracy, low-cost and continuous glucose monitoring, we have developed a non-invasive BG detection system using a mixed signal processor 430 (MSP430) microcontroller. This method is based on the combination of the conservation-of-energy method with a sensor integration module, which collects physiological parameters, such as the blood oxygen saturation (SPO2), blood flow velocity and heart rate. New methods to detect the basal metabolic rate (BMR) and BV are proposed, which combine the human body heat balance and characteristic signals of photoplethysmography as well dual elastic chambers theory. Four hundred clinical trials on real-time non-invasive BG monitoring under suitable experiment conditions were performed on different individuals, including diabetic patients, senior citizens and healthy adults. A multisensory information fusion model was applied to process these samples. The algorithm (we defined it as DCBPN algorithm) applied in the model combines a decision tree and back propagation neural network, which classifies the physiological and environmental parameters into three categories, and then establishes a corresponding prediction model for the three categories. The DCBPN algorithm provides an accuracy of 88.53% in predicting the BG of new samples. Thus, this system demonstrates a great potential to reliably detect BG values in a non-invasive setting.
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  • Human-mouse chimeric anti-CD147 antibody with non-fucosylated glycosylation

    The present disclosure relates to a nucleotide sequence comprising the sequence of SEQ ID NO: 5, and/or sequence of SEQ ID NO: 6, vector and host cell line comprising the nucleotide. The present disclosure also relates to an antibody that binds to extracellular region of human CD147, wherein the antibody comprises a heavy chain variable region having the amino acid sequence of SEQ ID NO: 2, and/or a light chain variable region having the amino acid sequence of SEQ ID NO: 1, and the antibody contains a glycoform lacking both fucose residues and xylose residues, pharmaceutical composition comprising the antibody or fragment thereof, the method of producing the antibody or fragment thereof, and use of the pharmaceutical composition in treatment of CD147 expression-related diseases.
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  • Glycosidic constituents from the roots and rhizomes of Melicope pteleifolia

    Yang Zhang   Li-Jun Yang   Kun Jiang   Chang-Heng Tan   Jun-Jie Tan   Pei-Ming Yang   Da-Yuan Zhu  

    Seven new diglycosidic constituents, named pteleifosides A-G (1-7), along with ten known glycosides, were isolated from the roots and rhizomes of Melicope pteleifolia (Champ. ex Benth.) T. Hartley. The structures of the isolated compounds were established on the basis of chemical and spectroscopic methods, mainly 1D and 2D NMR data and mass spectrometry.
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  • Detecting 100 fW cm−2 Light with Trapped Electron Gated Organic Phototransistors

    Yang Zhang   Yongbo Yuan and Jinsong Huang  

    Ultraweak light detection with solid-state and cooling-free photodetectors is important for both fundamental research and practical applications. A general phototransistor architecture for detecting ultraviolet–visible light down to 100 fW cm−2 at room temperature is demonstrated. The exceptional sensitivity stems from an amplification process triggered by incident light. A responsivity of ≈107 A W−1 is achieved.
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  • Balancing the Trade-Offs between Query Delay and Data Availability in MANETs

    Yang Zhang   Liangzhong Yin   Jing Zhao   Guohong Cao  

    In mobile ad hoc networks (MANETs), nodes move freely and link/node failures are common, which leads to frequent network partitions. When a network partition occurs, mobile nodes in one partition are not able to access data hosted by nodes in other partitions, and hence significantly degrade the performance of data access. To deal with this problem, we apply data replication techniques. Existing data replication solutions in both wired or wireless networks aim at either reducing the query delay or improving the data availability, but not both. As both metrics are important for mobile nodes, we propose schemes to balance the trade-offs between data availability and query delay under different system settings and requirements. Extensive simulation results show that the proposed schemes can achieve a balance between these two metrics and provide satisfying system performance.
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  • Hysteresis-Free Blue Phase Liquid-Crystal-Stabilized by ZnS Nanoparticles

    Ling Wang   Wanli He   Xia Xiao   Fanguo Meng   Yang Zhang   Pangyen Yang   Liping Wang   Jiumei Xiao   Huai Yang and Yunfeng Lu  

    Reversible electro-optical switching is achieved in a facile manner by dispersing a small amount of ZnS nanoparticles into blue phase I (BPI). The hysteresis is so small that it can be considered as hysteresis-free at a 0.5–0.7 wt% doping level, and the on-state voltage is much lower than that of polymer-stabilized BPI.
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  • Effects of decreasing carbohydrate content on properties of wood strands

    Omid Hosseinaei, Siqun Wang, Timothy G. Rials, Cheng Xing   Yang Zhang  

    Hot-water pretreatment was performed on wood strands to investigate effects of the extraction of hemicellulose under different temperature (140, 155, and 170 掳C) and time durations (30 and 60 min) conditions. Hydrolysate was analyzed by means of high-performance liquid chromatography. Chemical changes in the surface of wood strands were studied by infrared spectroscopy. The effects of hemicellulose extraction on the wettability of wood strands were studied by measuring the contact angle and surface free energy. The mechanical properties of wood cell walls before and after treatment were studied by nanoindentation. Among the extracted monosaccharides, mannose was found in the highest concentration. The mechanical properties of cell walls showed little decrease after extraction. The chemical changes in the surface of the wood strands reduced wettability of wood surface by water and produced hydrophobic characteristics after extraction.
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  • Neural coding of formant-exaggerated speech in the infant brain

    Yang Zhang   Tess Koerner   Sharon Miller   Zach Grice-Patil   Adam Svec   David Akbari   Liz Tusler   Edward Carney  

    Speech scientists have long proposed that formant exaggeration in infant-directed speech plays an important role in language acquisition. This event-related potential (ERP) study investigated neural coding of formant-exaggerated speech in 6-12-month-old infants. Two synthetic /i/ vowels were presented in alternating blocks to test the effects of formant exaggeration. ERP waveform analysis showed significantly enhanced N250 for formant exaggeration, which was more prominent in the right hemisphere than the left. Time-frequency analysis indicated increased neural synchronization for processing formant-exaggerated speech in the delta band at frontal-central-parietal electrode sites as well as in the theta band at frontal-central sites. Minimum norm estimates further revealed a bilateral temporal-parietal-frontal neural network in the infant brain sensitive to formant exaggeration. Collectively, these results provide the first evidence that formant expansion in infant-directed speech enhances neural activities for phonetic encoding and language learning.
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