The goal was to design a terrain-aided, all-weather filter, capable of real-time and global navigation, subject to several design objectives (incl. robustness wrt flight dynamics, terrain, and radar sensors). The algorithms combine nonlinear least squares (maximum likelihood) and Kalman filtering approaches.
Radar Altimeter Model, Extensions
These modules extend the functionality of the radar altimeter model (RAM), and include:1) Wrapper extension‘s goal is to automate terrain map (DEM) preparation for the measurement model while refreshing DEM only when needed (adaptive), accounting for attitude and radar angles (applicable to phase-array radars), providing control over computational efficiency (refresh frequency f and DEM data…
Toolkit for Digital Elevation Models
A set of software tools for processing DEMs (digital elevation models). Uses GDAL api, includes:1) DEM Downloader,where user specifies horizontal position and radius, and required DEM resolutions. Metadata are then retrieved using USGS-documented web API, processed, and finally DEMs are downloaded from remote server, with degenerate tiles further processed and/or merged.2) DEM Processor,which transforms from…
Gravity-Based Navigation
Frequency-Based Radar Altimeter Model
Radar Altimeter Model
The goal of this work is to develop mathematical models for terrain-aided navigation, such as radar altimetery and phased arrays, of high accuracy and fidelity. Potential applications include helicpoter landing and low-altitude flights, including nap-of-the-earth (aka ground-hugging).
Epidemiological Analysis of 2019 Wuhan Coronavirus Outbreak
Using multiple models for an infectious disease spread we present preliminary epidemiological predictions for the novel coronavirus (2019-nCoV) outbreak.
Impact of oral bile replacement on intestinal mucosa function
We evaluate the impact of oral bile replacement during external biliary drainage on the regenerative capabilities of instentinal mucosa, focusing on enterocytic integrity and mucosa barrier function. The drained biliary fluid undergoes a series of mechanical filtrations with progressively smaller porosity to reduce the bacterial load. The primary clinical markers observed during the therapy include…
Rock Climbing Physics: The Fundamental Mechanisms (book)
This is a no-nonsense treatise on scientific aspects of rock climbing, as well as technical discussion on some advanced climbing techniques. The mathematical and physical principles discussed herein aim to provide a self-consistent body of information from which practical advice on climbing techniques, use of equipment and safety, can be deduced by an astute reader.…
Association of a KMT2D mutation with endocrine and hepatobiliary pathology: A case report
We report an unusual case of a Kabuki syndrome associated with biliary atresia and endocrinopathies, and suggest a likely association of the causative mechanisms with the underlying KMT2D mutation. We discuss the pathologies in the context of laboratory, imaging, and modeling data, correlate latest findings of the relevant genetics studies, and outline the prospective therapies.