A Fully-Integrated 0.068-mm Implantable Pressure Sensing Device with Wireless Energy Harvesting and Data Telemetry.

This paper reports a fully-integrated sub-0.1 mm wireless pressure sensing device for implantable applications. The miniature device integrates a customized system-on-a-chip (SoC) and an off-the-shelf half-bridge piezoresistive pressure transducer, eliminating off-chip passive components.

A 36-nW Electrocardiogram Anomaly Detector Based on a 1.5-bit Non-Feedback Delta Quantizer for Always-on Cardiac Monitoring.

An always-on electrocardiogram (ECG) anomaly detector (EAD) with ultra-low power (ULP) consumption is proposed for continuous cardiac monitoring applications. The detector is featured with a 1.5-bit non-feedback delta quantizer (DQ) based feature extractor, followed by a multiplier-less convolutional neural network (CNN) engine, which eliminates the traditional high-resolution analog-to-digital converter (ADC) in conventional signal processing systems.

A 0.66mW 400 MHz/900 MHz Transmitter IC for In-Body Bio-Sensing Applications.

A sub-1GHz transmitter (TX) integrated chip (IC) with ultra-low power consumption and moderately high adjacent channel power rejection (ACPR) is presented for in-body bio-sensing applications. The 400 MHz 12-phase digital power amplifier (DPA) is implemented with the proposed 16QAM modulation scheme to improve the energy efficiency. The TX IC also contains a 900 MHz FSK TX realized with a symmetrical edge-combiner, which can be used in the low accuracy mode.

A Wireless Visualized Sensing System with Prosthesis Pose Reconstruction for Total Knee Arthroplasty.

The surgery quality of the total knee arthroplasty (TKA) depends on how accurate the knee prosthesis is implanted. The knee prosthesis is composed of the femoral component, the plastic spacer and the tibia component. The instant and kinetic relative pose of the knee prosthesis is one key aspect for the surgery quality evaluation.

Implantable Wireless Intracranial Pressure Monitoring Based on Air Pressure Sensing.

A wireless intracranial pressure (ICP) monitoring system based on the air pressure sensing is proposed in this work. The proposed system is composed of an implantable ICP sensing device and a portable wireless data recorder. The ICP sensing device consists of an air pressure sensor, an ultra-thin air pouch for pressure sensing, and a low-power dedicated system-on-a-chip (SoC) for the data acquisition control and wireless transmission.

Coronary artery disease reporting and data system (CAD-RADS): Inter-observer agreement for assessment categories and modifiers.

Background: The Coronary Artery Disease Reporting and Data System (CAD-RADS) provides a lexicon and standardized reporting system for coronary CT angiography.

Objectives: To evaluate inter-observer agreement of the CAD-RADS among an panel of early career and expert readers.

Methods: Four early career and four expert cardiac imaging readers prospectively and independently evaluated 50 coronary CT angiography cases using the CAD-RADS lexicon.

Resonance Frequency Readout Circuit for a 900 MHz SAW Device.

A monolithic resonance frequency readout circuit with high resolution and short measurement time is presented for a 900 MHz RF surface acoustic wave (SAW) sensor. The readout circuit is composed of a fractional-N phase-locked loop (PLL) as the stimulus source to the SAW device and a phase-based resonance frequency detecting circuit using successive approximation (SAR). A new resonance frequency searching strategy has been proposed based on the fact that the SAW device phase-frequency response crosses zero monotonically around the resonance frequency.

Polymer-Peptide Conjugates Disassemble Amyloid β Fibrils in a Molecular-Weight Dependent Manner.

Amyloid aggregation and deposition are associated with many intractable human diseases. Although the inhibition of amyloid protein aggregation has been well-studied, the disaggregation and dissolution of existing amyloid fibrils is less known. Taking a fibrillar assembly of amyloid β (Aβ) peptide as the model system, here we report multivalent polymer-peptide conjugates (mPPCs) that disassemble preformed Aβ fibrils into dispersible sub-100 nm structures.

Alarm signals of the Sichuan sika deer Cervus nippon sichuanicus.

Sichuan sika deer (Cervus nippon sichuanicus) is an endangered and endemic subspecies of sika deer to Sichuan Province, China. According to our observations in the wild, the Sichuan sika deer makes alarm signals in the presence of actual or potential predators. In order to test the variation of the rhythmic alarm calls in some sex/age classes and different risk contexts, we recorded alarm calls of Sichuan sika deer from 2 October to 30 November 2008 and from 4 April to 5 September 2009 in the Tiebu Nature Reserve, Zoige County, Sichuan Province, China, and made acoustic analysis of these alarm calls.

[Behavior ethogram and PAE coding system of Cervus nippon sichuanicus].

A monthly 5-day periodic observation at 06:00-18:00 from March to November 2007 was conducted to record the behavioral processes, contents, and results, and the surrounding habitats of Sichuan sika deer (Cervus nippon sichuanicus) in Donglie, Chonger, and Reer villages of Tiebu Natural Reserve of Sichuan Province. The behavioral ethogram, vigilance behaviors ethogram and its PAE (posture, act, and environment) coding system of the Sichuan sika deer were established, which filled the gap of the PAE coding of ungulates vigilance behaviors. A total of 11 kinds of postures, 83 acts, and 136 behaviors were recorded and distinguished, with the relative frequency of each behavior in relation to gender, age, and season described.