A5081897895- Planetary Science and Exploration
- Geochemistry and Geologic Mapping
- Astro and Planetary Science
- Distributed systems and fault tolerance
- Space Exploration and Technology
- Geological Modeling and Analysis
- Distributed and Parallel Computing Systems
- Mineral Processing and Grinding
- Space Science and Extraterrestrial Life
- Soil Geostatistics and Mapping
- AI-based Problem Solving and Planning
- Geophysical and Geoelectrical Methods
- Real-Time Systems Scheduling
- Advanced Malware Detection Techniques
- Air Quality and Health Impacts
- Aeolian processes and effects
- Coal Combustion and Slurry Processing
- Vehicle emissions and performance
- Spaceflight effects on biology
- Digital and Cyber Forensics
- Atmospheric chemistry and aerosols
- Hydrocarbon exploration and reservoir analysis
- Oil, Gas, and Environmental Issues
- Marine and environmental studies
- Heat transfer and supercritical fluids
Jet Propulsion Laboratory
2015-2024
California Institute of Technology
2013-2021
United States Air Force Research Laboratory
2017-2020
University of Tasmania
2016-2020
Australian Research Council
2019
Massachusetts Institute of Technology
2012-2014
American Institute of Aeronautics and Astronautics
2012-2014
Mining and Geological Survey of Hungary
1935
Faced with ongoing depletion of near-surface ore deposits, geologists are increasingly required to explore for deep deposits or those lying beneath surface cover. The result is increased drilling costs and a need maximize the value drill hole samples collected. Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) analysis pyrite one tool that showing promise in exploration. Since trace element content approximates composition fluid from which it precipitated...
Abstract The Mars Science Laboratory Curiosity rover performed coordinated measurements to examine the textures and compositions of aeolian sands in active Bagnold dune field. are rounded subrounded, very fine medium sized (~45–500 μm) with ≥6 distinct grain colors. In contrast examined by a dust‐covered, inactive bedform called Rocknest soils at other landing sites, darker, less red, better sorted, have fewer silt‐sized or smaller grains, show no evidence for cohesion. Nevertheless,...
The Eastern Goldfields of Western Australia is one the world’s premier gold-producing regions; however, large areas prospective bedrock are under cover and lack detailed lithologic mapping. Away from near-mine environment, exploration for new gold prospects requires mapping geology using limited data available with robust estimates uncertainty. We used machine learning algorithm Random Forests (RF) to classify lithology an underexplored area adjacent historically significant Junction mine,...
NASA's Perseverance rover uses robotic autonomy to achieve its mission goals on Mars. Its self-driving autonomous navigation system (AutoNav) has been used evaluate 88% of the 17.7-kilometer distance traveled during first Mars year operation. Previously, maximum total evaluated was 2.4 kilometers by Opportunity 14-year lifetime. AutoNav set multiple planetary records, including greatest driven without human review (699.9 meters) and single-day drive (347.7 meters). The Autonomous Exploration...
In jurisdictions including the US and EU ground transportation marine fuels have recently been required to contain lower concentrations of sulfur, which has resulted in reduced atmospheric SOx emissions. contrast, maximum sulfur content aviation fuel remained unchanged at 3000 ppm (although levels average 600 practice). We assess costs benefits a potential ultra-low (15 ppm) jet standard ("ULSJ"). estimate that global implementation ULSJ will cost US$1–4bn per year prevent 900–4000 air...
Abstract During Martian solar days 57–100, the Mars Science Laboratory Curiosity rover acquired and processed a solid (sediment) sample analyzed its mineralogy geochemistry with Chemistry Mineralogy Sample Analysis at instruments. An aeolian deposit—herein referred to as Rocknest sand shadow—was inferred represent global average soil composition selected for study facilitate integration of analytical results observations from earlier missions. first‐time activities, Hand Lens Imager (MAHLI)...
The Trident project is located in the Domes region of Central African Copper Belt and hosts a number mineralised systems including Sentinel (Ni) Enterprise (Cu) deposits. has received extensive systematic geochemical soil sampling addition to high resolution airborne geophysical coverage. This data-rich environment enables experimentation with machine learning strategies which aim produce or refine geological maps from limited direct observations. In this study we present series three case...
Scheduling often takes place in the context of execution. This reality drives several key design decisions: (1) when to invoke (re) scheduling, (2) what do scheduler is running, and (3) how use schedule execute scheduled activities. We define these decisions theoretically embedded practically an for a planetary rover. concept commit window enable execution previously generated while scheduling. concepts fixed cadence, event driven, hybrid scheduling control invocation flexible be adaptive...
Identifying the location of intrusions is a key component in exploration for porphyry Cu ± Mo Au deposits. In typical terrains, absence outcrop, can be difficult to discriminate from compositionally similar volcanic and volcanoclastic sedimentary rocks which they are emplaced. The ability produce lithological maps at an early stage significantly reduce costs by assisting planning prioritization detailed mapping sampling. Additionally, data-driven strategy provides opportunity discovery not...
This paper describes three approaches to enabling a severely computationally limited embedded scheduler consider small number of alternative activities based on resource availability. considers the case where is so that it cannot backtrack search. The first two precompile checks (called guards) only enable selection preferred activity if sufficient resources are estimated be available schedule remaining activities. third approach mimics backtracking by invoking multiple times with presents...
Modern cyber attacks are often conducted by distributing digital documents that contain malware. The approach detailed herein, which consists of a classifier uses features derived from dynamic analysis document viewer as it renders the in question, is capable classifying disposition with greater than 98% accuracy even when its model trained on just small amounts data. To keep classification itself and thereby to provide scalability, we employ an entity resolution strategy merges...
AbstractMachine Learning Algorithms (MLA) can be an effective means of lithological classification. The Random Forests™ (RF) supervised classification approach allows prediction lithology from disparate geophysical, geochemical and remote sensing data. In this study, we examine the relationship between accuracy information entropy (H). Data were processed in accordance with industry best practice input selection was optimised using RF. Using a training set containing 1.4% available pixels,...
Abstract The Mars Science Laboratory (MSL) Curiosity rover landed in Gale crater August of 2012 on its mission to explore Mt. Sharp as the first planetary collect and analyze rock regolith samples. On this new mission, sampling operations were conceived be executed serially situ, a “sample chain” along which sample would collected, then processed, delivered analysis instruments, analyzed there, discarded so chain could repeated. This paper describes evolution relatively simple into richer...
Mars rover operators have traditionally controlled the execution of behaviors using meticulously compiled "master" sequences that enforce deterministic timing and ordering activities. While approach is effective at managing risk complexity, it can be inefficient. Determinism demands conservatism in all things mitigated only cost fidelity ground modeling flight behavior, an elusive goal. Direct manipulation, as well inspection by mission automation layers used to build a schedule, both...
The Heazlewood-Luina-Waratah area is a prospective region for minerals in northwest Tasmania, Australia, associated with historically important ore deposits related to the emplacement of granite intrusions and/or ultramafic complexes. geology poorly understood due difficult terrain and dense vegetation. We have constructed an initial high-resolution 3D geologic model this using constraints from maps geophysical cross sections. This improved upon by integrating results geometry physical...
Mars rover operations has traditionally controlled behavior using meticulously compiled, so-called "Master" sequences that enforce deterministic timing and ordering of activities. While the approach is effective at managing risk complexity, it can also be inefficient. Extended Mars2020 envisions a fundamentally different scheduling execution approach. Atomic activities are constrained by mission operators in time, resource usage, structure dependencies. The flight software will create...
As the Mars 2020 rover mission has transitioned into use of an autonomous scheduling and execution framework known as "On-Board Planner" in October 2023, only one domain its functionality continued to produce complexity churn flight ground implementation. This parallel thread thermal control for Mars2020's actuators instruments services a variety patterns operations that must all be accommodated without substantially delaying or dropping activities, support On-Board Planner's foundational...
Random Forests, a supervised machine learning algorithm, provides robust, data driven means of predicting lithology from geophysical, geochemical and remote sensing data. As an essential part input selection, datasets are ranked in order importance to the classification outcome. Those most important provide, on average, decisive split between lithological classes. These rankings provide explorers with additional line reasoning complement conventional, geophysical interpretation workflows....
The design methodologies of using sequence diagrams, multi-process functional flow and hierarchical state machines were successfully applied in designing three MSL (Mars Science Laboratory) flight software modules responsible for handling actuator motions the CHIMRA (Collection Handling In situ Martian Rock Analysis), IC (Inlet Covers), DRT (Dust Removal Tool) mechanisms. essential to specify complex interactions with other modules, support concurrent foreground background motions, handle...