A Numerical Investigation into the Spread Characteristics of a Human Virus-Carrying Droplet in a Classroom Environment.

In public health, the transmission characteristics and laws of highly infectious virus-carrying particles in the air environment have become a hot topic. The study on the spread characteristics of human virus-carrying droplets in a typical densely populated space is necessary. As such, a classroom space lattice Boltzmann method (LBM) model with a dense population is established to simulate and analyze the spreading and diffusing behavior of pathogenic droplets.

Enhanced monocular visual odometry integrated with laser distance meter for astronaut navigation.

Visual odometry provides astronauts with accurate knowledge of their position and orientation. Wearable astronaut navigation systems should be simple and compact. Therefore, monocular vision methods are preferred over stereo vision systems, commonly used in mobile robots.

Characterization of maternal body movement during sleep before and after parturition.

The purpose of this study was to characterize the different features of body movements for females before and after parturition. Body movement signal was measured by a piezoelectric sensor board which was deployed on the abdominal position beneath a mattress during sleep to monitor pressure changes around abdominal area. Body movement epochs were detected by an innovative algorithm based on Hilbert transform.

Performance assessment on different measurement positions for monitoring HR/RR during sleep.

This study aims to investigate the measurement performance on different sensor deployment and to determine the optimal position for monitoring heart rate (HR) and respiration rate (RR) during sleep. Five identical sensor boards were deployed on different positions simultaneously during sleep to detect changes of applied pressure due to heart beating and breathing. One board was set beneath the pillow; the other four boards were set under the mattress aligning with the head, back, hip and calf, respectively.

[Suitability evaluation of Panax quinquefolium's producing area based on TCMGIS- I].

Objective: To supply the scientific data for the choice of medicinal plants' producing area through analyzing the suitable area for Panax quinquefolium' growth.

Method: TCMGIS-I (Suitability evaluation geographic information system of traditional Chinese medicine producing area) was developed and used to analyze the suitable producing area of P. quinquefolium Wisconsin state of USA, one of the origin producing area of the geo-authentic crude drugs, was selected as the standard analytical area and some key factors related to plant growth such as average temperature, altitude, soil type, precipitation were chosen to be considered.