Search Results - "Unnikrishnan, Avinash"

Exploring the impact of socio-demographic characteristics, health concerns, and product type on home delivery rates and expenditures during a strict COVID-19 lockdown period: A case study from Portland, OR by Figliozzi, Miguel, Unnikrishnan, Avinash

“…E-commerce volumes and home deliveries have experienced steady growth in the last two decades. Strict COVID-19 lockdowns made home delivery an essential…”
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Exploratory analysis of factors affecting levels of home deliveries before, during, and post- COVID-19 by Unnikrishnan, Avinash, Figliozzi, Miguel

“…•Survey and models to compare home deliveries before, during, and post COVID-19.•Significant increase in household home deliveries during COVID-19…”
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Shopping Travel Behaviour Trade-Offs Between Physical Stores and Online Deliveries: Post-COVID Scenario in New Delhi, India by Pani, Agnivesh, Unnikrishnan, Avinash, Sinha, Shambhavi, Varghese, Varun

“…This research focuses on understanding the impact of the type of shopping activity (general shopping goods, grocery, prepared meals) on shopping channel…”
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Analysis of large truck crash severity using heteroskedastic ordered probit models by Lemp, Jason D., Kockelman, Kara M., Unnikrishnan, Avinash

“…▶ Ordered probit models used for large truck crash injury severity analysis. ▶ Likelihood of severe injury or fatality rises with number of trailers. ▶…”
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Evaluation of Shared Space to Reduce Traffic Congestion by Frosch, Colin, Unnikrishnan, Avinash, Martinelli, David

“…Pedestrian and vehicle interactions often lead to conflicts that bring about safety, traffic congestion, and priority or right of way issues. Common methods…”
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Adaptive routing behavior with real-time information under multiple travel objectives by Venkatraman, Ravi, Boyles, Stephen D., James, Rachel, Unnikrishnan, Avinash, Patil, Priyadarshan N.

“…•A web-based experiment is used to study driver behavior with real-time information.•The experiment simulates various travel objectives using disutility…”
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Distribution and Antibiotic Resistance Profiles of Salmonella enterica in Rural Areas of North Carolina After Hurricane Florence in 2018 by Mao, Yuqing, Zeineldin, Mohamed, Usmani, Moiz, Uprety, Sital, Shisler, Joanna L., Jutla, Antarpreet, Unnikrishnan, Avinash, Nguyen, Thanh H.

“…In this study, water samples were analyzed from a rural area of North Carolina after Hurricane Florence in 2018 and the distribution of the ttrC virulence gene…”
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Home-deliveries before-during COVID-19 lockdown: Accessibility, environmental justice, equity, and policy implications by Figliozzi, Miguel, Unnikrishnan, Avinash

“…•Analysis of home delivery access before and during COVID-19 lockdown.•Underserved populations access decreased during the lockdown.•Develop the concept of…”
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Influence of Demand Uncertainty and Correlations on Traffic Predictions and Decisions by Duthie, Jennifer C., Unnikrishnan, Avinash, Waller, S. Travis

“…:  Decisions to improve a regional transportation network are often based on predictions of future link flows that assume future travel demand is a…”
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Characterizations and Quantitative Estimation of Alkali-Activated Binder Paste from Microstructures by Kar, Arkamitra, Ray, Indrajit, Halabe, Udaya B., Unnikrishnan, Avinash, Dawson-Andoh, Ben

“…Alkali-activated binder (AAB) is recently being considered as a sustainable alternative to portland cement (PC) due to its low carbon dioxide emission and…”
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Two-stage robust facility location problem with drones by Zhu, Tengkuo, Boyles, Stephen D., Unnikrishnan, Avinash

“…The past few years have witnessed the increasing adoption of drones in various industries such as logistics, agriculture, military, and telecommunications…”
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Plug-In Hybrid Electric Vehicle Traveling-Salesman Problem with Drone by Zhu, Tengkuo, Boyles, Stephen D., Unnikrishnan, Avinash

“…Drones and electric vehicles (EVs) represent promising technologies for enhancing the efficiency and sustainability of last-mile delivery services. This paper…”
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Maximum coverage capacitated facility location problem with range constrained drones by Chauhan, Darshan, Unnikrishnan, Avinash, Figliozzi, Miguel

“…•Novel MIP model to locate facilities and assign drones and customers to facilities.•MIP constrained by the number and capacity of facilities and drones…”
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Case Study of Drone Delivery Reliability for Time-Sensitive Medical Supplies With Stochastic Demand and Meteorological Conditions by Glick, Travis B., Figliozzi, Miguel A., Unnikrishnan, Avinash

“…Drones are increasingly being utilized to deliver medical supplies, and the COVID-19 pandemic has accelerated this trend. Drones arrive quickly by taking more…”
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A time of day analysis of crashes involving large trucks in urban areas by Pahukula, Jasmine, Hernandez, Salvador, Unnikrishnan, Avinash

“…•Large truck-involved crashes should be analyzed by time of day based on similar characteristics (i.e., traffic volume, driver behavior and light…”
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Robust Maximum Coverage Facility Location Problem with Drones Considering Uncertainties in Battery Availability and Consumption by Chauhan, Darshan R., Unnikrishnan, Avinash, Figliozzi, Miguel, Boyles, Stephen D.

“…Given a set of a spatially distributed demand for a specific commodity, potential facility locations, and drones, an agency is tasked with locating a…”
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Robust hub network design problem by Shahabi, Mehrdad, Unnikrishnan, Avinash

“…•We develop a robust hub location formulation with demand uncertainty.•A conic integer programming formulation is provided.•A strong linear relaxation is…”
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Battery Electric Vehicle Traveling Salesman Problem with Drone by Zhu, Tengkuo, Boyles, Stephen D., Unnikrishnan, Avinash

“…The idea of deploying electric vehicles and unmanned aerial vehicles (UAVs), also known as drones, to deliver packages in logistics operations has attracted…”
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Evaluation of Posted Speed Limits Reductions on Urban Roads with a High Percentage of Cyclists by Schaefer, Jaclyn S., Figliozzi, Miguel A., Unnikrishnan, Avinash

“…This paper presents a before and after analysis of the impact of posted speed limit (PSL) changes on passenger car (FHWA class 2 vehicle) speeds in Portland,…”
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Mean‐standard deviation model for minimum cost flow problem by Gokalp, Can, Boyles, Stephen D., Unnikrishnan, Avinash

“…We study the mean‐standard deviation minimum cost flow (MSDMCF) problem, where the objective is minimizing a linear combination of the mean and standard…”
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