Chris Lee

ORCID: 0000-0001-7020-2036
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About
Contact & Profiles
Research Areas
  • Global Education and Multiculturalism
  • Traffic and Road Safety
  • Traffic Prediction and Management Techniques
  • Advanced Fiber Laser Technologies
  • Photonic and Optical Devices
  • Eosinophilic Esophagitis
  • Psychosocial Factors Impacting Youth
  • Traffic control and management
  • Advancements in Photolithography Techniques
  • Electron and X-Ray Spectroscopy Techniques
  • Transportation Planning and Optimization
  • Spectroscopy Techniques in Biomedical and Chemical Research
  • Solid State Laser Technologies
  • Semiconductor Lasers and Optical Devices
  • Laser Design and Applications
  • Plasma Diagnostics and Applications
  • Advanced Fluorescence Microscopy Techniques
  • Graphene research and applications
  • Semiconductor materials and devices
  • Photorefractive and Nonlinear Optics
  • Advanced Fiber Optic Sensors
  • Spectroscopy and Laser Applications
  • Ion-surface interactions and analysis
  • Diamond and Carbon-based Materials Research
  • Eosinophilic Disorders and Syndromes

University of North Carolina at Chapel Hill
2011-2025

Stony Brook University
2024-2025

Yale University
2024

Northwestern University
2017-2024

University of Windsor
2015-2024

Tarumanagara University
2024

University of Washington
2024

Energetiq Technology (United States)
2023-2024

Midwestern University
2024

Fontys University of Applied Sciences
2018-2023

This paper develops a unified framework for image-to-image translation based on conditional diffusion models and evaluates this four challenging tasks, namely colorization, inpainting, uncropping, JPEG restoration. Our simple implementation of outperforms strong GAN regression baselines all without task-specific hyper-parameter tuning, architecture customization, or any auxiliary loss sophisticated new techniques needed. We uncover the impact an L2 vs. L1 in denoising objective sample...

10.1145/3528233.3530757 preprint EN 2022-07-20

The likelihood of a crash or potential is significantly affected by the short-term turbulence traffic flow. For this reason, must be estimated on real-time basis monitoring current condition. In regard, probabilistic prediction model relating to various flow characteristics that lead occurrence, “crash precursors,” was developed. development previous model, however, several assumptions were made had not been clearly verified from either theoretical empirical perspectives. Therefore,...

10.3141/1840-08 article EN Transportation Research Record Journal of the Transportation Research Board 2003-01-01

10.1016/j.trc.2006.06.002 article EN Transportation Research Part C Emerging Technologies 2006-06-01

Traffic flow characteristics that lead to crashes on urban freeways are examined. Since these observed prior crash occurrence, they referred as “crash precursors.” The objectives ( a) explore factors contributing changes in rate for individual vehicles traveling over an freeway and b) develop a probabilistic model relating significant precursors potential. data used examine were extracted from 38 loop detector stations 10-km stretch of the Gardiner Expressway Toronto 13-month period. An...

10.3141/1784-01 article EN Transportation Research Record Journal of the Transportation Research Board 2002-01-01

In this article, we report a facile electrochemical method to modify anatase TiO2 by cathodically biasing in an ethylene glycol electrolyte. The resulting black is highly stable with significantly narrower bandgap and higher electrical conductivity. Furthermore, largely improved photoconversion efficiency (increased from 48% 72% the visible region, nearly 0% 7% UV region), photocatalytic efficiency, charge-storage capability (∼42 fold increase) are achieved for treated TiO2.

10.1039/c3ta13963h article EN Journal of Materials Chemistry A 2013-10-29

Transition metal dichalcogenides (TMDs) have emerged as a new class of two-dimensional materials that are promising for electronics and photonics. To date, optoelectronic measurements in these shown the conventional behavior expected from photoconductors such linear or sublinear dependence photocurrent on light intensity. Here, we report observation regime operation where depends superlinearly We use spatially resolved devices consisting CVD-grown monolayers TMD alloys spanning MoS2 to MoSe2...

10.1021/acs.nanolett.5b00190 article EN Nano Letters 2015-02-27

We demonstrate supercontinuum generation in stoichiometric silicon nitride (Si3N4 SiO2) integrated optical waveguides, pumped at telecommunication wavelengths. The pump laser is a mode-locked erbium fiber wavelength of 1.56 µm with pulse duration 120 fs. With waveguide-internal energy 1.4 nJ and waveguide 1.0 × 0.9 cross section, designed for anomalous dispersion across the 1500 nm range, output spectrum extends from visible, around 526 nm, up to mid-infrared, least 2.6 µm, instrumental...

10.1364/oe.25.001542 article EN cc-by Optics Express 2017-01-19

Using an innovative, tissue‐independent approach to decellularized tissue processing and biomaterial fabrication, the development of a series “tissue papers” derived from native porcine tissues/organs (heart, kidney, liver, muscle), bovine tissue/organ (ovary uterus), purified Achilles tendon collagen as control extracellular matrix particle ink suspensions cast into molds is described. Each paper type has distinct microstructural characteristics well physical mechanical properties, capable...

10.1002/adfm.201700992 article EN publisher-specific-oa Advanced Functional Materials 2017-08-07

We report ultra-broadband supercontinuum generation in high-confinement Si3N4 integrated optical waveguides. The spectrum extends through the visible (from 470 nm) to infrared spectral range (2130 comprising a bandwidth wider than 495 THz, which is widest generated on chip.

10.1364/oe.23.019596 article EN cc-by Optics Express 2015-07-20

10.1016/j.aap.2016.07.028 article EN publisher-specific-oa Accident Analysis & Prevention 2016-07-29

The kindergarten program, Tools of the Mind (Tools), has been shown to improve executive functions (as assessed by laboratory measures) and academic performance. objective here was see if can in real world (in classroom), outcomes not previously investigated, reduce bullying peer ostracism, increase teachers' students' joy being classroom. This first randomized controlled trial Canada included 351 children (mean age 5.2 years at entry; 51% female) 18 public schools. Stratified randomization...

10.1371/journal.pone.0222447 article EN cc-by PLoS ONE 2019-09-17

Kreuz and Glucksberg (1989) argued that sarcasm irony are similar in both forms of reminder, yet different conveys ridicule a specific victim whereas does not. This article reports two experiments provide empirical evidence this relation. In experiments, undergraduates read series passages. One group rated target utterance terms the extent to which it was good example sarcasm, second irony. Experiment 1, manipulation found affect participants' ratings hut not their 2, an ridiculed were...

10.1207/s15327868ms1301_1 article EN Metaphor and Symbol 1998-03-01

Abstract This article provides a comprehensive overview of the novel idea real-time traffic safety improvement on freeways. Crash prone conditions freeway mainline and ramps were identified using loop detector data, then intelligent transportation systems (ITS) strategies to reduce crash risk in are proposed. Separate logistic regression models for assessing crashes occurring under two speed regimes estimated. The results show that variables consistent with probable mechanisms respective...

10.1080/15472450701410395 article EN Journal of Intelligent Transportation Systems 2007-06-30

In this paper we present a novel fabrication technique for silicon nitride (Si3N4) waveguides with thickness of up to 900 nm, which are suitable nonlinear optical applications. The method is based on etching trenches in thermally oxidized and filling the Si3N4. Using no stress-induced cracks Si3N4 layer were observed resulting high yield devices wafer. propagation losses obtained measured be as low 0.4 dB/cm at wavelength around 1550 nm.

10.1364/oe.23.000642 article EN cc-by Optics Express 2015-01-12

10.1016/j.trc.2016.02.012 article EN Transportation Research Part C Emerging Technologies 2016-03-07
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