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Articles 1 - 8 of 8
Full-Text Articles in Physical Sciences and Mathematics
Deep Learning, Medical Physics And Cargo Cult Science., Miguel Romero Phd, Gilmer Valdes Phd, Timothy Solberg Phd, Yannet Interian Phd
Deep Learning, Medical Physics And Cargo Cult Science., Miguel Romero Phd, Gilmer Valdes Phd, Timothy Solberg Phd, Yannet Interian Phd
Creative Activity and Research Day - CARD
Deep learning algorithms have become widely popular, with considerable success in fields where datasets have hundreds of thousands or million points. As deep learning is increasingly applied to the fields of medical physics and radiation oncology, a reasonable question follows: are these techniques the best approach, given the unique conditions in our field? In this study, we investigate the dependence of dataset size on the performance of deep learning algorithms compared with more traditional radiomics-based methods.
Forecasting Smart Meter Energy Usage Using Distributed Systems And Machine Learning, Feiran Ji, Chris Dong, Lingzhi Du, Zizhen Song, Yuedi Zheng, Paul Intrevado
Forecasting Smart Meter Energy Usage Using Distributed Systems And Machine Learning, Feiran Ji, Chris Dong, Lingzhi Du, Zizhen Song, Yuedi Zheng, Paul Intrevado
Creative Activity and Research Day - CARD
In this research, we explore the technical and computational merits of a machine learning algorithm on a large data set, employing distributed systems. Using 167 million(10 GB) energy consumption observations collected by smart meters from residential consumers in London, England, we predict future residential energy consumption using a Random Forest machine learning algorithm. Distributed systems such as AWS S3 and EMR, MongoDB and Apache Spark are used. Computational times and predictive accuracy are evaluated. We conclude that there are significant computational advantages to using distributed systems when applying machine learning algorithms on large-scale data. We also observe that distributed systems …
An Optimization Approach To Automate The Generation Of Radiotherapy Treatment Plans, Qian Li
An Optimization Approach To Automate The Generation Of Radiotherapy Treatment Plans, Qian Li
Creative Activity and Research Day - CARD
The main goal of radiotherapy is to deliver a specified dose of radiation directly to the tumor while minimizing radiation damage to healthy tissues. Currently, the treatment plan is being developed by professional planners using a commercial treatment planning system. In this treatment planning system, the planner modifies the objectives and weights of the objectives until an ideal combination of doses is achieved. This arbitrary process can cost a few hours or a day to finish. My research aims to automate the generation of the plans by implementing an optimization algorithm on top of the treatment planning system using gradient …
Improving Habitat Restoration For Native Pollinators In San Francisco, Tyrha Delger
Improving Habitat Restoration For Native Pollinators In San Francisco, Tyrha Delger
Creative Activity and Research Day - CARD
By looking at how these three species are conserved inside and outside of San Francisco, how an urban environment might affect habitat conservation, and lessons learned from other cities’ restoration projects, we can improve urban habitat conservation projects.
Plant Biodiversity In The Face Of Climate Change: What Will Become Of Coastal Endemic Species?, Nila Le
Plant Biodiversity In The Face Of Climate Change: What Will Become Of Coastal Endemic Species?, Nila Le
Creative Activity and Research Day - CARD
How will longitudinally constrained coastal flora fare in the face of rapid anthropogenic climate change and disturbance? Coastal communities pose a unique problem for climate change and its associated risks. Species that are concentrated along the coast are naturally vulnerable to the influence of harsh abiotic ecology, such as coastal erosion and high salt concentrations. In addition, analogous to montane species-habitat interactions, coastal communities may be “pushed” off the coast edge as a result of tracking preferred climate in the face of climate variability and sea level rise. This can be problematic for species that cannot disperse quickly enough to …
Modulated Hydrothermal Synthesis And Optimization Of Hf/Zr-Fumarate Metal-Organic Frameworks, Ioannina Castano
Modulated Hydrothermal Synthesis And Optimization Of Hf/Zr-Fumarate Metal-Organic Frameworks, Ioannina Castano
Creative Activity and Research Day - CARD
Water-stable Hf/Zr-Fumarate (FMA) metal-organic frameworks (MOFs) are highly promising for gas separation because of their postulated small pore size compared to other UiO-66-type MOFs and the low cost of fumaric acid. However, the efficient synthesis of these MOFs remains a big challenge. A mild, green, scalable modulated hydrothermal (MHT) method was applied for the synthesis of these MOFs. Specifically, acetic acid (AA), formic acid (FA), and trifluoroacetic acid (TFA) were used as the modulators. Various water to modulator solvent ratios were studied to investigate the effects of modulators on surface area and gas uptake properties. The MHT synthesized Hf/Zr-FMA MOFs …
Combustion Products Of Ethyl Tert-Butyl Ether Using Synchrotron Photoionization, Rong Yao, Martin Ng, David Osborn, Craig Taatjes, Giovanni Meloni
Combustion Products Of Ethyl Tert-Butyl Ether Using Synchrotron Photoionization, Rong Yao, Martin Ng, David Osborn, Craig Taatjes, Giovanni Meloni
Creative Activity and Research Day - CARD
The photolytically Cl initiated oxidation reaction of ETBE was investigated at the Advanced Light Source located in the Lawrence Berkeley National Laboratory. Using the multiplex photoionization mass spectrometer data were collected at the low pressure (4-8 Torr) and temperature (298 – 700 K) regimes. Data analysis was performed via characterization of the reaction species photoionization spectra and kinetic traces. A reaction schematic including branching fractions determination is presented and discussed.
Investigation Of Oxidation Reaction Products Of 2-Phenylethanol Using Synchrotron Photoionization, Magaly Wooten, Anthony Medrano, David Osborn, Craig Taatjes, Giovanni J. Meloni
Investigation Of Oxidation Reaction Products Of 2-Phenylethanol Using Synchrotron Photoionization, Magaly Wooten, Anthony Medrano, David Osborn, Craig Taatjes, Giovanni J. Meloni
Creative Activity and Research Day - CARD
Photolytically Cl-initiated oxidation reaction of 2-phenylethanol (2-PE) was carried out at the Advanced Light Source (ALS) in the Lawrence Berkeley National Laboratory. Using the multiplex photoionization mass spectrometer, coupled with the tunable vacuum ultraviolet radiation of the ALS, data were collected at low pressure (4 – 6 Torr) and temperature (298 – 550 K) regimes. Data analysis was performed via characterization of the reaction species photoionization spectra and kinetic traces.