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Tim Johnsen Email & Phone Number
PhD student and GSR and TA
at
UC Irvine
1 work email found
@uci.edu
LinkedIn matched
✓ Verified May 2026
4 data sources
Profile completeness 100%
Current company
Role
PhD student and GSR and TA
Location
Irvine, California, United States
Who is Tim Johnsen? Overview
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Quick answer
Tim Johnsen is listed as PhD student and GSR and TA at UC Irvine, based in Irvine, California, United States. AeroLeads shows a work email signal at uci.edu and a matched LinkedIn profile for Tim Johnsen.
Tim Johnsen previously worked as PhD student / GSR at Uc Irvine and Student Affiliate at Berkeley Lab. Tim Johnsen holds Doctor Of Philosophy - Phd, Computational Sciences from Uc Irvine.
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{first_initial}{last}@uci.edu
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Profile bio
About Tim Johnsen
I started the fourth year of my PhD studies in Fall of 2024, in the Joint Doctoral Program in Computational Sciences with San Diego State University and the University of California Irvine. This program focuses on applying artificial intelligence and high performance computing methods to STEM. My mission is to develop adaptive, dynamic, and efficient Intelligent Data Understanding (IDU) systems capable of integrating multiple modalities from a sensor array for improved scientific yield and discovery — with a focus on remote surveyors that explore unknown terrain, both off and on Earth. Specifically, I develop perception-based neural networks to process an amalgam of local and global sensor observations, which can then be used by a downstream model tasked with some sort of (semi-)autonomous decision making. Local data consists of high-fidelity observations made within the nearby vicinity of a robot or device, such as scientific sensors, cameras, and LiDAR; and global data consists of low-fidelity observations taken from a larger scope, such as satellites, high flying UAVs, and weather towers. A key mechanism in my research is to: (1) train the neural network with high-performance computing, allowing the algorithm to digitally explore the high dimensional feature-space inherent in multiple-modality data; and then (2) reduce the computational resources required to execute the neural network during inference, making the trained model more efficient and deployable to resource-constrained devices typical in remote surveyors. The core novelty of my thesis is in the development of Adaptive Dynamic Deep Neural Networks (ADDNN), which intelligently scale down the number of computations, active sensors, and other parameters, in response to perceived context and difficulty of a scenario, on a case-by-case basis. Some applications are based in robotics, navigation, and autonomy, making use of edge computing, split computing, early exists, and slimmable neural networks.
Listed skills include Physics, Neural Networks, Spectroscopy, Raman Spectroscopy, and 31 others.
Current workplace
Tim Johnsen's current company
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9 roles
Tim Johnsen work experience
A career timeline built from the work history available for this profile.
Phd Student / Gsr
CurrentMy working thesis is entitled “Adaptable Dynamic Deep Neural Networks”.Executing state-of-the-art (SoA) neural network models can have large resource costs in the form of execution time and energy expenditure, due to an increasingly large amount of parameters (e.g., activation functions, bias terms, and weights) that results in upwards to billions of.
Jul 2022 - Present
Student Affiliate
CurrentI am developing machine learning applications for uncertainty quantification in measurements of watershed environments, for the purpose of improved decision making from a Self Guided Field Lab (SGFL) designed to study evapotranspiration systems. My current contribution is a Denoisoing AutoEncoder with Monte Carlo sampling methods, that repairs corrupted.
Jun 2023 - Present
Aug 2021 - Jul 2022
Data Scientist
My main focus was on recommendation systems for healthcare plans. I researched using Graph Convolutional Neural Networks (GCNN) with customer and agent co-sale matrices, and semi supervised learning. My tasks varied from model development and comparison, data processing and pipeline development, to researching and analyzing new methods. I wrote a custom.
Jun 2021 - Aug 2021
Research Assistant - Ai And Physics
My main focus is on applied machine learning and spectroscopy (with multimodal sensors), to identify, classify, and characterize minerals, rocks, organics, and exoplanets. This is a contractor position at NASA Ames Research Center, through SETI Institute. I have worked here through several NASA funded internships and other grants, both part time and full.
Jan 2015 - Jun 2021
Research Assistant - Ai And Physics
Contract position with SETI institute.
Jan 2015 - Jun 2021
Experimental Aero Physics
My responsibilities were to help deploy an autonomous 2D-traverse wind tunnel probe, and develop a Java web-crawler for post processing ADS-B aircraft flyover information (from the ground up). This was a summer internship at the Fluid Mechanics Lab with Bruce Storms.
Jun 2018 - Aug 2018
Mar 2020 - Jun 2020
5 education records
Tim Johnsen education
Doctor Of Philosophy - Phd, Computational Sciences
Uc Irvine
Doctor Of Philosophy - Phd, Computational Science
San Diego State University
Master Of Science - Ms, Data Analytics From The Department Of Applied Data Science
San José State University
Bachelor Of Science - Bs, Engineering Physics/Applied Physics
Uc Irvine
Transfer, Computer Science
Riverside City College
FAQ
Frequently asked questions about Tim Johnsen
Quick answers generated from the profile data available on this page.
What company does Tim Johnsen work for?
Tim Johnsen works for UC Irvine.
What is Tim Johnsen's role at UC Irvine?
Tim Johnsen is listed as PhD student and GSR and TA at UC Irvine.
What is Tim Johnsen's email address?
AeroLeads has found 1 work email signal at @uci.edu for Tim Johnsen at UC Irvine.
Where is Tim Johnsen based?
Tim Johnsen is based in Irvine, California, United States while working with UC Irvine.
What companies has Tim Johnsen worked for?
Tim Johnsen has worked for Uc Irvine, Berkeley Lab, San Diego State University, Ehealth, Inc., and Seti Institute.
How can I contact Tim Johnsen?
You can use AeroLeads to view verified contact signals for Tim Johnsen at UC Irvine, including work email, phone, and LinkedIn data when available.
What schools did Tim Johnsen attend?
Tim Johnsen holds Doctor Of Philosophy - Phd, Computational Sciences from Uc Irvine.
What skills is Tim Johnsen known for?
Tim Johnsen is listed with skills including Physics, Neural Networks, Spectroscopy, Raman Spectroscopy, Support Vector Machine, Coding Experience, Research And Development, and Eclipse Cdt.
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