Works (84)

Updated: April 4th, 2024 00:35

2023 journal article

Agent-Based Simulation of Spontaneous Volunteer Convergence to Improve Disaster Planning

NATURAL HAZARDS REVIEW, 24(2).

By: K. Paret n, S. Rodriguez n, M. Mayorga n, L. Velotti* & E. Lodree*

UN Sustainable Development Goal Categories
13. Climate Action (OpenAlex)
Sources: Web Of Science, ORCID
Added: April 18, 2023

2023 article

Detecting Human Trafficking: Automated Classification of Online Customer Reviews of Massage Businesses

Li, R., Tobey, M., Mayorga, M. E., Caltagirone, S., & Ozaltin, O. Y. (2023, February 22). M&SOM-MANUFACTURING & SERVICE OPERATIONS MANAGEMENT, Vol. 2.

By: R. Li n, M. Tobey n, M. Mayorga n, S. Caltagirone & O. Ozaltin n

author keywords: human trafficking; massage businesses; online customer reviews; Natural Language Processing; ensemble learning
TL;DR: The proposed models can save countless hours in IMB investigations by automatically sorting through large quantities of data to flag potential illicit activity, eliminating the need for manual screening of these reviews by law enforcement and other stakeholders. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: March 20, 2023

2023 article

Engaging stakeholders in the use of an interactive simulation tool to support decision-making about the implementation of colorectal cancer screening interventions

Meghan. C. C. O'Leary, Lich, K. H., Mayorga, M. E. E., Hicklin, K., Davis, M. M. M., Brenner, A. T. T., … Wheeler, S. B. B. (2023, May 6). CANCER CAUSES & CONTROL, Vol. 5.

By: . Meghan. C. C. O'Leary, K. Lich*, M. Mayorga n, K. Hicklin*, M. Davis*, A. Brenner*, D. Reuland*, S. Birken*, S. Wheeler*

author keywords: Decision-making; Simulation; Implementation; Evidence-based intervention; Colorectal cancer screening
TL;DR: To increase the tool’s utility, providing detailed guidance on how to implement the selected EBIs, and the extent to which users can expect similar CRC screening gains in their contexts, should be prioritized. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: May 30, 2023

2023 journal article

TL;DR: Scenarios remained close to reality for 22 weeks on average before the arrival of unanticipated SARS-CoV-2 variants invalidated key assumptions, and an ensemble of participating models that preserved variation between models was consistently more reliable than any single model in periods of valid scenario assumptions, while projection interval coverage was near target levels. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (OpenAlex)
Sources: Web Of Science, ORCID
Added: February 26, 2024

2023 article

Introduction to the Special Issue on Analytical Methods for Detecting, Disrupting, and Dismantling Illicit Operations

Sharkey, T. C., Keskin, B. B., Konrad, R., & Mayorga, M. E. (2023, October 18). IISE TRANSACTIONS, Vol. 10.

By: T. Sharkey*, B. Keskin*, R. Konrad* & M. Mayorga n

Sources: Web Of Science, ORCID
Added: November 27, 2023

2023 journal article

Quantifying association and disparities between diabetes complications and COVID-19 outcomes: A retrospective study using electronic health records

PLOS ONE, 18(9).

By: N. Paramita n, J. Agor*, M. Mayorga*, J. Ivy*, K. Miller* & O. Ozaltin*

TL;DR: The presence of diabetes complications increases the risks of COVID-19 infection, hospitalization, and worse health outcomes with respect to in-hospital mortality and longer hospital length of stay, and health disparities in CO VID-19 outcomes across demographic groups in the diabetes population are shown. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (OpenAlex)
Sources: Web Of Science, ORCID
Added: October 30, 2023

2023 journal article

Routing and staffing in emergency departments: A multiclass queueing model with workload dependent service times

IISE TRANSACTIONS ON HEALTHCARE SYSTEMS ENGINEERING, 13(1), 46–61.

By: S. Nambiar n, M. Mayorga n & Y. Liu n

author keywords: Simulation; fluid approximation; queueing model; patient flow
TL;DR: This work model a multiclass multiserver queueing system where patients of varying acuity receive care from one of several wards, each ward is attended by several nurses who work as a team, and incorporates state-dependent service times into the model. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: November 6, 2023

2022 journal article

Assessing the impact of multicomponent interventions on colorectal cancer screening through simulation: What would it take to reach national screening targets in North Carolina

PREVENTIVE MEDICINE, 162.

author keywords: Simulation; Modeling; Colorectal cancer screening; Multicomponent interventions; Population -level outcomes; Targets
MeSH headings : Colonoscopy; Colorectal Neoplasms / diagnosis; Colorectal Neoplasms / epidemiology; Colorectal Neoplasms / prevention & control; Early Detection of Cancer; Humans; Mass Screening; North Carolina / epidemiology; Occult Blood; United States
TL;DR: The potential for states to reach national CRC screening targets using multicomponent EBIs is clarified, but decision-makers also should consider tradeoffs in cost, reach, and ability to reduce disparities when selecting interventions. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: August 22, 2022

2022 article

COULD EARLIER AVAILABILITY OF BOOSTERS AND PEDIATRIC VACCINES HAVE REDUCED IMPACT OF COVID-19?

2022 WINTER SIMULATION CONFERENCE (WSC), pp. 1092–1103.

By: E. Rosenstrom n, J. Ivy n, M. Mayorga n & J. Swann n

TL;DR: The results of the simulation model suggest that the timing of childhood vaccination and booster efforts could have resulted in a reduced disease burden and that prioritizing childhood vaccinations would most effectively reduce disease spread. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (OpenAlex)
Sources: Web Of Science, ORCID
Added: September 5, 2023

2022 journal article

Cross-sector decision landscape in response to COVID-19: A qualitative network mapping analysis of North Carolina decision-makers

FRONTIERS IN PUBLIC HEALTH, 10.

By: C. Biddell*, K. Johnson*, M. Patel*, R. Smith*, H. Hecht*, J. Swann n, M. Mayorga n, K. Lich*

author keywords: COVID-19; community health; cross-sector collaboration; decision-making; crisis response
MeSH headings : COVID-19 / epidemiology; Decision Making; Humans; North Carolina; Pandemics; Public Health / methods
TL;DR: The cross-sector organizational decision landscape that formed in response to the COVID-19 pandemic in North Carolina was examined, illuminating the impacts different organizations may have on information/misinformation, prevention behaviors, and, ultimately, health. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: September 12, 2022

2022 journal article

GENERATION 1.5: YEARS IN THE UNITED STATES AND OTHER FACTORS AFFECTING SMOKING BEHAVIORS AMONG ASIAN AMERICANS

ETHNICITY & DISEASE, 32(2), 75–80.

author keywords: Generation 1; 5; Asian Ameri-cans; Smoking; Social Determinants of Health
MeSH headings : Adult; Asian; Asian People; Child; Cigarette Smoking; Female; Humans; Male; Smoking / epidemiology; Tobacco Use; United States / epidemiology
TL;DR: While Asian men who came to the United States before 12 were less at risk for cigarette smoking than those who immigrated in adulthood, the pattern was the opposite among Asian women. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (Web of Science; OpenAlex)
Sources: Web Of Science, ORCID
Added: May 23, 2022

2022 article

Interpretable models for the automated detection of human trafficking in illicit massage businesses

Tobey, M., Li, R., Ozaltin, O. Y., Mayorga, M. E., & Caltagirone, S. (2022, August 28). IISE TRANSACTIONS, Vol. 8.

By: M. Tobey n, R. Li n, O. Ozaltin n, M. Mayorga n & S. Caltagirone

author keywords: Human trafficking; illicit massage; interpretable machine learning; risk scores; decision trees
TL;DR: This work uses findings from primary stakeholder interviews with law enforcement, regulatory bodies, legitimate massage practitioners, and subject-matter experts from nonprofit organizations to identify data sources and potential indicators of illicit massage businesses (IMBs). (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: September 26, 2022

2022 journal article

Modeling the Impact of Nonpharmaceutical Interventions on COVID-19 Transmission in K-12 Schools

MDM POLICY & PRACTICE, 7(2).

By: Y. Zhang n, M. Mayorga n, J. Ivy n, K. Lich* & J. Swann n

author keywords: SEIR model; infectious disease; in-school testing; contact reduction; masking
TL;DR: A deterministic stratified SEIR model is developed that captures the role of social contacts in K-12 schools to estimate COVID-19 transmission under different nonpharmaceutical interventions and finds that masks and reducing contacts can greatly reduce new infections among students. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (Web of Science; OpenAlex)
Sources: Web Of Science, ORCID
Added: December 3, 2022

2022 article

Organizational decision-making during COVID-19: A qualitative analysis of the organizational decision-making system in the United States during COVID-19

Johnson, K., Biddell, C. B. B., Hecht, H. K. K., Lich, K. H. H., Swann, J., Delamater, P., … Patel, M. D. D. (2022, November 18). JOURNAL OF CONTINGENCIES AND CRISIS MANAGEMENT, Vol. 11.

author keywords: COVID-19; decision science; systems science; organizational behaviour
UN Sustainable Development Goal Categories
4. Quality Education (Web of Science)
Sources: Web Of Science, ORCID
Added: December 12, 2022

2022 journal article

The SMART Framework: Selection of Machine Learning Algorithms With ReplicaTions-A Case Study on the Microvascular Complications of Diabetes

IEEE JOURNAL OF BIOMEDICAL AND HEALTH INFORMATICS, 26(2), 809–817.

By: B. Swan n, M. Mayorga n & J. Ivy n

author keywords: Data-driven modeling; decision theory; diabetes; machine learning
MeSH headings : Algorithms; Diabetes Complications; Diabetes Mellitus / diagnosis; Humans; Machine Learning
TL;DR: The Selection of Machine-learning Algorithms with ReplicaTions (SMART) Framework is a powerful, interactive tool that incorporates various ML algorithms and stakeholder preferences, generalizable to new data and technological advancements. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: April 4, 2022

2022 article

When History and Heterogeneity Matter: A Tutorial on the Impact of Markov Model Specifications in the Context of Colorectal Cancer Screening

Townsley, R. M., Koutouan, P. R., Mayorga, M. E., Mills, S. D., Davis, M. M., & Hasmiller Lich, K. (2022, May 11). MEDICAL DECISION MAKING, Vol. 5.

By: R. Townsley*, P. Koutouan n, M. Mayorga n, S. Mills*, M. Davis* & K. Hasmiller Lich*

author keywords: colorectal cancer screening; markov models; microsimulation
MeSH headings : Colonoscopy; Colorectal Neoplasms / diagnosis; Colorectal Neoplasms / epidemiology; Early Detection of Cancer / methods; Humans; Mass Screening / methods; Occult Blood
TL;DR: Colorectal cancer screening trajectories and projected health outcomes were sensitive to the use of alternate Markov model specifications, demonstrating the importance of examining the memoryless assumption of the first-order Markovmodel when simulating health care utilization over time. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: May 31, 2022

2021 journal article

Assigning spontaneous volunteers to relief efforts under uncertainty in task demand and volunteer availability

OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE, 99.

By: K. Paret n, M. Mayorga n & E. Lodree*

author keywords: Volunteer management; Disaster operations management; Spontaneous volunteer; Markov decision process; Discrete event simulation
TL;DR: A multi-server queuing model is formulated to represent the dynamics of assigning spontaneous volunteers to tasks in a post-disaster setting and an optimal policy for assigning volunteers to task is generated using a Markov Decision Process. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (OpenAlex)
Sources: Web Of Science, ORCID
Added: January 4, 2021

2021 journal article

Association of Simulated COVID-19 Vaccination and Nonpharmaceutical Interventions With Infections, Hospitalizations, and Mortality

JAMA NETWORK OPEN, 4(6).

By: M. Patel*, E. Rosenstrom n, J. Ivy n, M. Mayorga n, P. Keskinocak*, R. Boyce*, K. Hassmiller Lich*, R. Smith* ...

MeSH headings : Adult; COVID-19 / epidemiology; COVID-19 / prevention & control; COVID-19 / transmission; COVID-19 Vaccines / pharmacology; Communicable Disease Control / methods; Communicable Disease Control / organization & administration; Communicable Disease Control / statistics & numerical data; Computer Simulation; Disease Transmission, Infectious / prevention & control; Female; Hospitalization / statistics & numerical data; Humans; Male; Mass Vaccination / organization & administration; Mass Vaccination / statistics & numerical data; Mortality; North Carolina / epidemiology; Risk Assessment / methods; Risk Assessment / statistics & numerical data; SARS-CoV-2; Treatment Outcome; Vaccination Coverage / organization & administration; Vaccination Coverage / statistics & numerical data
TL;DR: Findings highlight the need for high COVID-19 vaccine coverage and continued adherence to NPIs before safely resuming many prepandemic activities. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: June 10, 2021

2021 article

To Reduce Healthcare Workload: Identify Critical Sepsis Progression Moments through Deep Reinforcement Learning

2021 IEEE INTERNATIONAL CONFERENCE ON BIG DATA (BIG DATA), pp. 1640–1646.

By: S. Ju n, Y. Kim n, M. Ausin n, M. Mayorga n & M. Chi n

author keywords: Reinforcement Learning; Sepsis; Critical Decision
TL;DR: The Critical-DRL approach, by which decisions are made at critical junctures, is as effective as a fully executed DRL policy and moreover, it enables the critical moments in the septic treatment process, thus greatly reducing burden on medical decision-makers by allowing them to make critical clinical decisions without negatively impacting outcomes. (via Semantic Scholar)
UN Sustainable Development Goal Categories
4. Quality Education (Web of Science)
16. Peace, Justice and Strong Institutions (OpenAlex)
Sources: Web Of Science, ORCID
Added: July 5, 2022

2020 article

EVALUATING DIABETIC RETINOPATHY SCREENING INTERVENTIONS IN A MICROSIMULATION MODEL

2020 WINTER SIMULATION CONFERENCE (WSC), pp. 944–955.

By: B. Swan n, S. Nambiar n, P. Koutouan n, M. Mayorga n, J. Ivy n & S. Fransen

TL;DR: A microsimulation integrating the natural history model of DR with a patient’s interaction with the care system increased adherence of patients with vision-threatening DR to follow-up eye care, decreased the number of ‘unnecessary’ visits in specialty eye care from patients without VTDR, and decreased the total years spent blind. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: August 30, 2021

2020 review

Notice to comply: A systematic review of clinician compliance with guidelines surrounding acute hospital-based infection management

[Review of ]. AMERICAN JOURNAL OF INFECTION CONTROL, 48(8), 940–947.

By: K. McKenzie n, M. Mayorga n, K. Miller*, N. Singh n, R. Arnold* & S. Romero-Brufau*

author keywords: Guideline adherence; Practice patterns (physicians); Quality; Program evaluation; Professional practice gaps; Outcome and process assessment (health care)
MeSH headings : Hospitals; Humans; Outcome Assessment, Health Care; Quality Improvement
TL;DR: Multimodal interventions and quality improvement initiatives seem to produce the greatest improvement in compliance, but trends in other factors were inconsistent. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: August 10, 2020

2020 journal article

Prepositioning disaster relief supplies using robust optimization

IISE TRANSACTIONS, 52(10), 1122–1140.

By: G. Velasquez n, M. Mayorga n & O. Ozaltin n

Contributors: G. Velasquez n, M. Mayorga n & O. Özaltın n

author keywords: Humanitarian logistics; inventory prepositioning; disaster relief supply chains; robust optimization
TL;DR: A case study of the hurricane season in the Southeast US is used to gain insights on the effects of optimization criteria and critical model parameters to relief supply prepositioning strategy. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (OpenAlex)
Sources: Web Of Science, ORCID
Added: April 6, 2020

2020 journal article

The potential impact of the Affordable Care Act and Medicaid expansion on reducing colorectal cancer screening disparities in African American males

PLOS ONE, 15(1).

By: W. Powell*, L. Frerichs*, R. Townsley n, M. Mayorga n, J. Richmond*, G. Corbie-Smith*, S. Wheeler*, K. Lich*

MeSH headings : Black or African American; Aged; Colorectal Neoplasms / diagnosis; Colorectal Neoplasms / economics; Early Detection of Cancer / economics; Early Detection of Cancer / ethics; Healthcare Disparities / economics; Healthcare Disparities / trends; Humans; Male; Medicaid / economics; Medicaid / trends; Middle Aged; North Carolina; Patient Protection and Affordable Care Act / economics; Patient Protection and Affordable Care Act / trends; Race Factors / economics; United States
TL;DR: The findings suggest policies that expanding affordable, quality healthcare coverage could have a demonstrable, cost-saving impact while reducing cancer disparities are suggested. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: June 22, 2020

2020 journal article

Workflow Differences Affect Data Accuracy in Oncologic EHRs: A First Step Toward Detangling the Diagnosis Data Babel

JCO CLINICAL CANCER INFORMATICS, 4, 529–538.

By: F. Diaz-Garelli*, R. Strowd*, V. Lawson*, M. Mayorga n, B. Wells*, T. Lycan*, U. Topaloglu*

MeSH headings : Data Accuracy; Electronic Health Records; Humans; Physicians; Surveys and Questionnaires; Workflow
TL;DR: Clinicians and researchers reusing oncologic data should consider such heterogeneity when conducting secondary analyses of EHR data, and the need for specific structured DX data recording varies across clinical workflows and may be dependent on clinical information needs. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: March 1, 2021

2019 journal article

An effective integer program for a general assembly line balancing problem with parallel workers and additional assignment restrictions

Journal of Manufacturing Systems, 50, 180–192.

By: B. Pearce*, K. Antani*, L. Mears*, K. Funk*, M. Mayorga* & M. Kurz*

author keywords: General assembly line balancing; Heuristics; integer programming models
TL;DR: A heuristic, combining rank-position-weighting, last-fit-improvement and iterative blocking scheme, and an integer program that can manage multiple constraint types simultaneously, are developed and indicate that the integer programming model provides a viable solution method for those industries with access to commercial solvers. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: February 24, 2020

2019 review

Colorectal cancer screening in newly insured Medicaid members: a review of concurrent federal and state policies

[Review of ]. BMC HEALTH SERVICES RESEARCH, 19.

By: . Meghan C. O'Leary*, K. Lich*, Y. Gu*, S. Wheeler*, G. Coronado*, S. Bartelmann, B. Lind*, M. Mayorga n, M. Davis*

author keywords: Colorectal Cancer; Health Policy; Health Promotion; Medicaid; Screening
MeSH headings : Accountable Care Organizations; Aged; Cohort Studies; Colorectal Neoplasms / diagnosis; Colorectal Neoplasms / prevention & control; Cost Sharing; Early Detection of Cancer / methods; Facilities and Services Utilization; Female; Health Policy; Humans; Male; Medicaid / statistics & numerical data; Medically Uninsured / statistics & numerical data; Middle Aged; Oregon; Primary Health Care / statistics & numerical data; United States
TL;DR: The increased uptake of CRC screening in 2013 and 2014 is associated with the timing of policies such as Medicaid expansion, enhanced federal matching for preventive services offered to Medicaid enrollees without cost sharing, and formation of Medicaid accountable care organizations, which included CRC screening as an incentivized quality metric. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: May 28, 2019

2019 journal article

Estimating the impact of insurance expansion on colorectal cancer and related costs in North Carolina: A population-level simulation analysis

PREVENTIVE MEDICINE, 129.

MeSH headings : Aged; Colorectal Neoplasms / diagnosis; Colorectal Neoplasms / therapy; Computer Simulation; Cost Savings / statistics & numerical data; Early Detection of Cancer / economics; Early Detection of Cancer / statistics & numerical data; Female; Humans; Insurance, Health / economics; Insurance, Health / statistics & numerical data; Male; Mass Screening / economics; Medicaid / economics; Medicaid / statistics & numerical data; Medicare / economics; Medicare / statistics & numerical data; Middle Aged; North Carolina; Patient Protection and Affordable Care Act; United States
TL;DR: Estimated cost savings - balancing increased CRC screening/testing costs against decreased cancer treatment costs - are approximately $30’M and $970 M for Medicaid expansion and Medicare-for-all scenarios, respectively, compared to status quo. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: February 10, 2020

2019 journal article

Identifying trade-offs in equity and efficiency for simultaneously optimizing location and multipriority dispatch of ambulances

INTERNATIONAL TRANSACTIONS IN OPERATIONAL RESEARCH, 26(2), 415–438.

By: S. Enayati*, M. Mayorga n, H. Toro-Diaz* & L. Albert*

author keywords: location/allocation in health care; multicriteria; fairness; call priority; genetic algorithms
Sources: Web Of Science, ORCID
Added: November 26, 2018

2019 journal article

Mailed FIT (fecal immunochemical test), navigation or patient reminders? Using microsimulation to inform selection of interventions to increase colorectal cancer screening in Medicaid enrollees

PREVENTIVE MEDICINE, 129.

By: M. Davis*, S. Nambiar n, M. Mayorga n, E. Sullivan*, K. Hicklin*, . Meghan C. O'Leary*, K. Dillon*, K. Lich* ...

Contributors: M. Davis*, S. Nambiar n, M. Mayorga n, E. Sullivan*, K. Hicklin*, . M.C. O'Leary, K. Dillon*, K. Hassmiller Lich* ...

author keywords: Colorectal cancer; Simulation; Screening; Cancer prevention & control; Disparities; Intervention selection; Implementation; Medicaid
MeSH headings : Colorectal Neoplasms / diagnosis; Computer Simulation; Cost-Benefit Analysis; Early Detection of Cancer / statistics & numerical data; Female; Humans; Immunohistochemistry; Male; Mass Screening / economics; Mass Screening / statistics & numerical data; Medicaid / statistics & numerical data; Middle Aged; Occult Blood; Oregon; Patient Navigation / statistics & numerical data; Postal Service; Reminder Systems / statistics & numerical data; United States
TL;DR: To approach national CRC screening targets, health system stakeholders are encouraged to implement Mailed FIT with or without Navigation and Reminders, and to approach national screening targets if stakeholders were willing to pay $230 or less per additional year up-to-date. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: February 10, 2020

2019 review

Objective measures of workload in healthcare: a narrative review

[Review of ]. INTERNATIONAL JOURNAL OF HEALTH CARE QUALITY ASSURANCE, 33(1), 1–17.

By: D. Fishbein*, S. Nambiar n, K. McKenzie n, M. Mayorga n, K. Miller*, K. Tran*, L. Schubel*, J. Agor*, T. Kim*, M. Capan*

Contributors: D. Fishbein*, S. Nambiar n, K. McKenzie n, M. Mayorga n, K. Miller*, K. Tran*, L. Schubel*, J. Agor*, T. Kim*, M. Capan*

author keywords: Workload; Care delivery needs of patients; Clinician performance; Objective workload; Task demand
MeSH headings : Electronic Health Records; Health Personnel / statistics & numerical data; Humans; Qualitative Research; Quality of Health Care; Tertiary Healthcare; Workload / classification; Workload / statistics & numerical data
TL;DR: An overview of objective measures of workload associated with direct care delivery in tertiary healthcare settings with a focus on measures that can be obtained from electronic records to inform operationalization of workload measurement is provided. (via Semantic Scholar)
UN Sustainable Development Goal Categories
4. Quality Education (Web of Science)
Sources: Web Of Science, ORCID
Added: January 21, 2020

2019 journal article

Prepositioning inventory for disasters: a robust and equitable model

OR SPECTRUM, 41(3), 757–785.

By: G. Velasquez n, M. Mayorga n & E. Cruz*

author keywords: Humanitarian logistics; Heuristics; Robust optimization; Facility location; Inventory prepositioning; Equity
UN Sustainable Development Goal Categories
13. Climate Action (OpenAlex)
Sources: Web Of Science, ORCID
Added: October 14, 2019

2018 journal article

Ambulance redeployment and dispatching under uncertainty with personnel workload limitations

IISE TRANSACTIONS, 50(9), 777–788.

By: S. Enayati*, O. Ozaltin n, M. Mayorga n & C. Saydam n

Contributors: S. Enayati*, O. Özaltın n, M. Mayorga n & C. Saydam n

author keywords: EMS; workload; two-stage stochastic programming; decomposition algorithm
TL;DR: This work proposes a two-stage stochastic programming model to redeploy and dispatch ambulances to maximize the expected coverage and develops a Lagrangian branch-and-bound algorithm to solve realistic size instances. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2018 article

Introduction to the Special Issue on Advancing Health Services

Maillart, L. M., & Mayorga, M. E. (2018, September). SERVICE SCIENCE, Vol. 10, pp. V-VII.

By: L. Maillart* & M. Mayorga n

UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: October 16, 2018

2018 journal article

Real-Time Ambulance Dispatching and Relocation

Manufacturing & Service Operations Management, 20(3), 467–480.

By: A. Nasrollahzadeh*, A. Khademi* & M. Mayorga n

author keywords: ambulance operations management; dispatching; redeployment; reallocation; approximate dynamic programming
TL;DR: The problem is formulated as a stochastic dynamic program, and, because the state space is unbounded, an approximate dynamic programming (ADP) framework is developed to generate high-quality solutions. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: December 15, 2019

2018 journal article

Real-time ambulance redeployment approach to improve service coverage with fair and restricted workload for EMS providers

Omega, 79, 67–80.

By: S. Enayati*, M. Mayorga n, H. Rajagopalan* & C. Saydam*

author keywords: Dynamic redeployment; Healthcare; EMS; Workload
TL;DR: A real-time approach to maximize coverage with minimum possible total travel time, while restricting accumulated workload for EMS personnel as well as providing more evenly distributed workload between ambulances in a shift is developed. (via Semantic Scholar)
Sources: Web Of Science, Crossref, ORCID
Added: October 19, 2018

2017 journal article

A Maximum Expected Covering Problem for District Design

Transportation Science, 51(1), 376–390.

By: S. Ansari*, L. McLay & M. Mayorga n

author keywords: emergency medical services; expected covering models; queuing approximations; Hypercube correction factors; load balancing; district contiguity
TL;DR: A novel mixed integer linear programming (MILP) model that determines how to locate and dispatch ambulances through district design and maximizes the coverage level is proposed, which suggests that the reduction in coverage to maintain contiguity and balanced workloads among the ambulances is small. (via Semantic Scholar)
Sources: Web Of Science, Crossref, ORCID
Added: August 6, 2018

2017 journal article

Changes in cigarette smoking initiation, cessation, and relapse among US adults: a comparison of two longitudinal samples

TOBACCO INDUCED DISEASES, 15.

By: Z. Yi n, M. Mayorga n, K. Lich* & J. Pearson*

author keywords: Smoking; Initiation; Cessation; Relapse; Cigarette
TL;DR: Transitions between smoking states are complex and increasingly unstable, requiring a holistic, population-based perspective to understand the stocks and flows that ultimately dictate the public health impact of cigarette smoking behavior. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2017 journal article

Cost-Effectiveness Analysis of Four Simulated Colorectal Cancer Screening Interventions, North Carolina

Preventing Chronic Disease, 14.

By: K. Hassmiller Lich*, D. Cornejo n, M. Mayorga n, M. Pignone*, F. Tangka*, L. Richardson*, T. Kuo*, A. Meyer* ...

MeSH headings : Aged; Colorectal Neoplasms / diagnosis; Colorectal Neoplasms / epidemiology; Computer Simulation; Cost-Benefit Analysis; Female; Humans; Male; Mass Screening / economics; Mass Screening / methods; Middle Aged; North Carolina; Risk Factors
TL;DR: Cost-effective CRC screening interventions targeting observed disparities are available, but substantial investment and additional approaches beyond those considered here are required to realize greater increases population-wide. (via Semantic Scholar)
Sources: Web Of Science, Crossref, ORCID
Added: August 6, 2018

2017 chapter

Forecasting Recipient Outcomes of Deceased Donor Livers

In Stochastic Modeling and Analytics in Healthcare Delivery Systems (pp. 189–209).

By: R. Townsley n, M. Mayorga n, A. Barritt IV & E. Orman*

Sources: Crossref, ORCID
Added: December 15, 2019

2017 journal article

Multilevel predictors of colorectal cancer testing modality among publicly and privately insured people turning 50

Preventive Medicine Reports, 6, 9–16.

By: S. Wheeler*, T. Kuo*, A. Meyer*, C. Martens*, K. Hassmiller Lich*, F. Tangka*, L. Richardson*, I. Hall* ...

TL;DR: Both colonoscopy and FOBT/FIT are widely used in North Carolina among insured persons newly age-eligible for screening, and the high level of FOBTs use among privately insured persons and women suggests that renewed emphasis on FOBt/F IT as a viable screening alternative to Colonoscopy may be important. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: December 15, 2019

2017 conference paper

Simulating triage of patients into an internal medicine department to validate the use of an optimization-based workload score

2017 winter simulation conference (wsc), 2881–2892.

By: J. Agor n, K. McKenzie n, M. Mayorga n, O. Ozaltin n, R. Parikh* & J. Huddleston*

Contributors: J. Agor n, K. McKenzie n, M. Mayorga n, O. Ozaltin n, R. Parikh* & J. Huddleston*

TL;DR: A simulation model was used to evaluate a proposed workload score designed to assist in triaging patients into the hospital services of the Division of Hospital Internal Medicine at Mayo Clinic in an effort to more equitably balance workload. (via Semantic Scholar)
Sources: NC State University Libraries, ORCID
Added: August 6, 2018

2017 journal article

The optimal assignment of spontaneous volunteers

Journal of the Operational Research Society, 68(9), 1106–1116.

By: M. Mayorga n, E. Lodree* & J. Wolczynski n

author keywords: volunteer assignment; disaster operations management; Markov decision process
TL;DR: This work model this problem as a multi-server queueing system with both stochastic server arrival and abandonment, intended to be applied to the relatively stable work associated with recovery efforts, e.g., debris clearing. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (OpenAlex)
Sources: Web Of Science, Crossref, ORCID
Added: August 6, 2018

2017 journal article

Trends in Characteristics of Patients Listed for Liver Transplantation Will Lead to Higher Rates of Waitlist Removal Due to Clinical Deterioration

Transplantation, 101(10), 2368–2374.

MeSH headings : Adolescent; Adult; Age Factors; Computer Simulation; Disease Progression; End Stage Liver Disease / diagnosis; End Stage Liver Disease / mortality; End Stage Liver Disease / surgery; Female; Forecasting; Health Services Needs and Demand / trends; Healthcare Disparities / trends; Humans; Liver Transplantation / trends; Male; Middle Aged; Models, Theoretical; Needs Assessment / trends; Patient Dropouts; Process Assessment, Health Care / trends; Risk Assessment; Risk Factors; Time Factors; Tissue and Organ Procurement / trends; United States / epidemiology; Waiting Lists / mortality; Young Adult
TL;DR: The liver transplant waitlist size will remain static over the next decade due to patient dropout, but Liver transplant candidates will be older, more likely to have nonalcoholic steatohepatitis and will wait for transplantation longer even when listed at a competitive MELD score. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: December 16, 2019

2016 conference paper

A Discrete event simulation model to estimate population level health and economic impacts of smoking cessation interventions

2016 10th european conference on antennas and propagation (eucap), 1257–1268.

By: M. Mayorga, O. Reifsnider, S. Wheeler & R. Kohler

Source: NC State University Libraries
Added: August 6, 2018

2016 conference paper

A Framework for modeling the complex interaction between breast cancer and diabetes

2016 10th european conference on antennas and propagation (eucap), 1245–1256.

By: S. Goodarzi n, K. McKenzie n, N. Nataraj n, J. Ivy n, M. Mayorga n, J. Mason*, J. Tejada

TL;DR: A simulation model framework is built that explores the interaction between breast cancer and diabetes and assesses the prognosis for women diagnosed with diabetes considering their breast cancer risk, using data from national survey and surveillance consortium studies. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (OpenAlex)
Sources: NC State University Libraries, ORCID
Added: August 6, 2018

2016 journal article

A nested-compliance table policy for emergency medical service systems under relocation

OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE, 58, 154–168.

By: K. Sudtachat*, M. Mayorga n & L. Mclay*

author keywords: Emergency medical service; Relocation; Nested-compliance table; Markov queuing model
TL;DR: This paper proposes a relocation strategy to improve the performance of EMS systems by determining an optimal nested-compliance table policy using steady state probabilities of a Markov chain model with relocation as input parameters. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2016 journal article

Coverage, survivability or response time: A comparative study of performance statistics used in ambulance location models via simulation–optimization

Operations Research for Health Care, 11, 1–12.

By: M. Zaffar*, H. Rajagopalan*, C. Saydam*, M. Mayorga n & E. Sharer*

author keywords: Ambulance location; Covering models; Survivability; Simulation; Metaheuristics
TL;DR: This paper compares the performance of three recent ambulance location model objectives by applying a simulation–optimization framework and shows that the maximum survivability objective performs better in both survivability and coverage metrics. (via Semantic Scholar)
Sources: Web Of Science, Crossref, ORCID
Added: August 6, 2018

2016 conference paper

Creating common patients and evaluating indiviual results: issues in indivual simulation for health policy analysis

2016 10th european conference on antennas and propagation (eucap), 1387–1398.

By: D. Cornejo, M. Mayorga & K. Lich

Source: NC State University Libraries
Added: August 6, 2018

2016 conference paper

Simulation of triaging patients into an internal medicine department to validate the use of an optimization based workload score

2016 winter simulation conference (wsc), 0, 3708–3709.

By: J. Agor n, K. McKenzie n, O. Ozaltin n, M. Mayorga n, R. Parikh* & J. Huddleston*

Contributors: J. Agor n, K. Mckenzie n, O. Ozaltin n, M. Mayorga n, R. Parikh* & J. Huddleston*

TL;DR: An overview of the development of a simulation model to be used in the assistance of triaging patients into the Hospital Internal Medicine Department at The Mayo Clinic in Rochester, MN in an effort to balance workload among the department services is provided. (via Semantic Scholar)
Sources: NC State University Libraries, ORCID
Added: August 6, 2018

2016 journal article

The numbers of new waitlist registrants and removals are outpacing the number of liver transplants: National trends and regional variation from 2003 through 2014

Hepatology, 64, 701A–701.

By: Z. Yi, M. Mayorga, S. Wheeler, P. Hayashi, A. Barritt & E. Orman

Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Declining liver graft quality threatens the future of liver transplantation in the United States

Liver Transplantation, 21(8), 1040–1050.

By: E. Orman*, M. Mayorga n, S. Wheeler*, R. Townsley n, H. Toro-Diaz*, P. Hayashi*, A. Sidney Barritt*

MeSH headings : Adult; Computer Simulation; Databases, Factual; Donor Selection / trends; Female; Forecasting; Graft Survival; Health Care Rationing / trends; Health Services Needs and Demand / trends; Humans; Liver Transplantation / adverse effects; Liver Transplantation / trends; Male; Middle Aged; Models, Theoretical; Needs Assessment; Postoperative Complications / etiology; Process Assessment, Health Care / trends; Reproducibility of Results; Risk Assessment; Risk Factors; Time Factors; Tissue Donors / supply & distribution; Treatment Outcome; United States
TL;DR: The transplant community will need to accept inferior grafts and potentially worse posttransplant outcomes and/or develop new strategies for increasing organ donation and utilization in order to maintain the number of LTs at the current level. (via Semantic Scholar)
Sources: Web Of Science, Crossref, ORCID
Added: August 6, 2018

2015 journal article

Increasing Prevalence of Diabetes During Pregnancy in South Carolina

Journal of Women’s Health, 24(4), 316–323.

By: C. Lynch*, N. Baker*, J. Korte*, J. Mauldin*, M. Mayorga n & K. Hunt*

MeSH headings : Adult; Black or African American / statistics & numerical data; Birth Certificates; Black People / statistics & numerical data; Diabetes Mellitus, Type 2 / ethnology; Diabetes, Gestational / ethnology; Female; Health Surveys; Hispanic or Latino / statistics & numerical data; Humans; Maternal Age; Pregnancy; Pregnancy in Diabetics / ethnology; Prevalence; Socioeconomic Factors; South Carolina / epidemiology; White People / statistics & numerical data; Young Adult
TL;DR: An increasing prevalence of diabetes during pregnancy is reported, as well as substantial lack of agreement in reporting of diabetes prevalence across administrative databases, which is impacted by screening, diagnostic, and reporting practices across different data sources, aswell as by actual changes in prevalence over time. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (Web of Science; OpenAlex)
5. Gender Equality (Web of Science)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2015 journal article

Reducing disparities in large-scale emergency medical service systems

Journal of the Operational Research Society, 66(7), 1169–1181.

By: H. Toro-Díaz*, M. Mayorga n, L. McLay*, H. Rajagopalan* & C. Saydam*

author keywords: location/allocation in healthcare; hypercube model; tabu search
TL;DR: This work approaches the planning of large-scale EMS systems including fairness considerations using a Tabu Search-based heuristic with an embedded approximation procedure for the queuing submodel, extending the approach in which strategic decisions (location) and operative decisions (dispatching) are combined to balance efficiency and fairness. (via Semantic Scholar)
Sources: Web Of Science, Crossref, ORCID
Added: August 6, 2018

2015 journal article

Trends in BMI and obesity in U.S. women of childbearing age during the period of 1980–2010

Health Systems, 4(3), 176–186.

By: M. Mayorga n, O. Reifsnider*, Z. Yi n & K. Hunt*

author keywords: obesity; body mass index; health disparities; simulation
TL;DR: There are differences in weight gain in black and white women, the racial disparity has worsened over time and that changes in theracial disparity were not because of changes inThe age structure of the population. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (Web of Science; OpenAlex)
Sources: Crossref, ORCID
Added: May 17, 2021

2014 journal article

Improving emergency service in rural areas: a bi-objective covering location model for EMS systems

Annals of Operations Research, 221(1), 133–159.

By: S. Chanta*, M. Mayorga* & L. McLay*

author keywords: Emergency medical service; Facility location; Bi-objective optimization; Discrete optimization
TL;DR: This paper proposes three bi-objective covering location models that directly consider fairness in semi-rural/semi-urban communities and results are discussed and compared to provide a menu of alternatives to policy makers. (via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (OpenAlex)
Sources: Crossref, ORCID
Added: May 17, 2021

2014 journal article

Predicting Liver Transplant Capacity Using Discrete Event Simulation

Medical Decision Making, 35(6), 784–796.

By: H. Toro-Díaz n, M. Mayorga n, A. Barritt n, E. Orman n & S. Wheeler n

author keywords: liver transplantation; organ donors; forecast; simulation
MeSH headings : Computer Simulation; Forecasting; Health Services Accessibility / statistics & numerical data; Health Services Accessibility / trends; Health Services Needs and Demand / statistics & numerical data; Health Services Needs and Demand / trends; Humans; Liver Transplantation / statistics & numerical data; Liver Transplantation / trends; Tissue Donors / supply & distribution; Tissue Survival; United States; Waiting Lists
TL;DR: A discrete event simulation model informed by current donor characteristics to predict future LT trends through the year 2030 can be used to develop policy interventions to prevent a further decline in this lifesaving therapy. (via Semantic Scholar)
Sources: Web Of Science, Crossref, ORCID
Added: August 6, 2018

2014 journal article

Priority dispatching strategies for EMS systems

JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY, 65(4), 572–587.

By: D. Bandara*, M. Mayorga n & L. McLay*

author keywords: health service; dispatching; patient survivability; simulation; heuristics
TL;DR: This study implements dispatching policies for EMS systems that incorporate the severity of the call in order to increase the survival probability of patients and a heuristic algorithm, that is easy to implement, is developed to dispatch ambulances for large-scale EMS systems. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2014 journal article

Recommendations for dispatching emergency vehicles under multitiered response via simulation

INTERNATIONAL TRANSACTIONS IN OPERATIONAL RESEARCH, 21(4), 581–617.

By: K. Sudtachat*, M. Mayorga n & L. McLay*

author keywords: emergency medical service; simulation; multiple-unit dispatch; call priorities
TL;DR: Numerical results show that dispatching while considering call priorities, rather than dispatching the closest units, improves EMS system effectiveness and a heuristic algorithm is developed for large-scale problems. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2014 journal article

The minimum p-envy location problem with requirement on minimum survival rate

COMPUTERS & INDUSTRIAL ENGINEERING, 74, 228–239.

By: S. Chanta*, M. Mayorga n & L. McLay*

author keywords: p-Envy; Location models; Survival function; Emergency medical service; Equity
TL;DR: An extension to the minimum p-envy location model is considered by evaluating the objective of the model based on a survival function instead of on a distance function since survival probability is directly related to patient outcomes with a constraint on minimum survival rate. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2013 journal article

A Dispatching Model for Server-to-Customer Systems That Balances Efficiency and Equity

Manufacturing & Service Operations Management, 15(2), 205–220.

By: L. McLay* & M. Mayorga*

author keywords: emergency medical services; server-to-customer systems; public health; equity; Markov decision processes; linear programming
TL;DR: This paper forms a model for determining how to optimally dispatch distinguishable servers to prioritized customers given a set of equity constraints and draws upon the decision analytic and social science literature to compare the effects of different notions of equity on the resulting dispatching policies. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: August 28, 2020

2013 journal article

A model for optimally dispatching ambulances to emergency calls with classification errors in patient priorities

IIE Transactions, 45(1), 1–24.

By: L. McLay* & M. Mayorga*

author keywords: Emergency medical dispatch; Markov decision processes
TL;DR: A model for determining how to optimally dispatch ambulances to patients to maximize the long-run average utility of the system, defined as the expected coverage of true high-risk patients. (via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions (OpenAlex)
Sources: Crossref, ORCID
Added: May 17, 2021

2013 journal article

Assortment and inventory decisions with multiple quality levels

Annals of Operations Research, 211(1), 301–331.

By: M. Mayorga n, H. Ahn* & G. Aydin

author keywords: Assortment planning; Inventory management; Consumer choice models
UN Sustainable Development Goal Categories
Sources: Web Of Science, Crossref, ORCID
Added: August 6, 2018

2013 journal article

Districting and dispatching policies for emergency medical service systems to improve patient survival

IIE Transactions on Healthcare Systems Engineering, 3(1), 39–56.

By: M. Mayorga*, D. Bandara* & L. McLay*

TL;DR: Computational results show that integrated districting and dispatching policies are vital in increasing patient survivability. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: May 17, 2021

2013 journal article

Joint location and dispatching decisions for Emergency Medical Services

Computers & Industrial Engineering, 64(4), 917–928.

By: H. Toro-Díaz*, M. Mayorga*, S. Chanta* & L. McLay*

author keywords: Location/allocation in healthcare; Hypercube model; Genetic algorithm
TL;DR: A mathematical formulation that combines an integer programming model representing location and dispatching decisions, with a hypercube model representing the queuing elements and congestion phenomena is developed, concluding that the joint approach can give insights of the implicit trade-offs between several conflicting optimization criteria. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: May 17, 2021

2013 journal article

Prioritization strategies for patient evacuations

Health Care Management Science, 17(1), 77–87.

By: A. Childers*, M. Mayorga* & K. Taaffe*

author keywords: Hospitals; Evacuation; Prioritization; Policy-making
MeSH headings : Algorithms; Computer Simulation; Disaster Planning / organization & administration; Health Care Rationing / organization & administration; Hospital Administration; Policy; Systems Analysis; Transportation of Patients / organization & administration
TL;DR: A dynamic programming model for emergency patient evacuations is presented to show that a greedy, “all-or-nothing” policy is not always optimal as well as discuss insights of the resulting optimal prioritization strategies for unit- or floor-level evacuations. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: December 15, 2019

2013 journal article

Simulated estimates of pre-pregnancy and gestational diabetes mellitus in the US: 1980 to 2008

PLoS One, 8(9).

MeSH headings : Adolescent; Adult; Black People; Body Mass Index; Diabetes, Gestational / epidemiology; Female; Humans; Models, Statistical; Pregnancy; Pregnancy in Diabetics / epidemiology; Prevalence; Risk Factors; United States / epidemiology; White People; Young Adult
TL;DR: Racial disparities in diabetes prevalence during pregnancy appear to stem from a higher prevalence of prepregnancy diabetes, but not GDM, in NHB than NHW. (via Semantic Scholar)
Sources: NC State University Libraries, ORCID
Added: August 6, 2018

2012 journal article

A dynamic programming approach to solving the assortment planning problem with multiple quality levels

Computers & Operations Research, 39(7), 1521–1529.

By: M. McElreath* & M. Mayorga*

author keywords: Assortment planning; Dynamic programming; Line search; Locational choice
TL;DR: A combined dynamic programming/line search approach is presented which finds an optimal solution when customer preference for the horizontal attributes are distributed according to a unimodal distribution and enables significant state reduction and therefore efficient solution times. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: August 28, 2020

2012 journal article

Estimated Number of Preterm Births and Low Birth Weight Children Born in the United States Due to Maternal Binge Drinking

Maternal and Child Health Journal, 17(4), 677–688.

By: K. Truong*, O. Reifsnider*, M. Mayorga* & H. Spitler*

author keywords: Maternal binge drinking; Preterm birth; Low birth weight; Racial/ethnic disparities; Simulation
MeSH headings : Adolescent; Adult; Age Distribution; Behavioral Risk Factor Surveillance System; Binge Drinking / complications; Binge Drinking / epidemiology; Cross-Sectional Studies; Economics; Ethnicity / statistics & numerical data; Female; Humans; Infant, Low Birth Weight; Infant, Newborn; Logistic Models; Male; Maternal Age; Pregnancy; Premature Birth / epidemiology; Prevalence; Risk Factors; United States / epidemiology; Young Adult
TL;DR: Maternal binge drinking contributed significantly to PTB and LBW differentially across sociodemographic groups, and women ages 40–44 had the highest adjusted binge drinking rate and highest PTB rate due to maternal binge drinking. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (OpenAlex)
Sources: Crossref, ORCID
Added: December 15, 2019

2012 journal article

Impact of maternal diabetes on birthweight is greater in non-Hispanic blacks than in non-Hispanic whites

Diabetologia, 55(4), 971–980.

By: K. Hunt*, N. Marlow*, M. Gebregziabher*, C. Ellerbe*, J. Mauldin*, M. Mayorga*, J. Korte*

author keywords: Birthweight; Diabetes; Gestational diabetes mellitus; Non-Hispanic black; Non-Hispanic white; Pregnancy; Prepregnancy diabetes
MeSH headings : Adolescent; Adult; Black or African American; Birth Weight / physiology; Diabetes Mellitus, Type 2 / ethnology; Diabetes, Gestational / ethnology; Female; Health Status Disparities; Humans; Infant, Newborn; Male; Maternal Age; Obesity / ethnology; Pregnancy; Pregnancy in Diabetics / ethnology; South Carolina; White People
TL;DR: The data suggest that the negative effects of GDM combined with obesity during pregnancy may be greater in NHB than in NHW individuals. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (OpenAlex)
Sources: Crossref, ORCID
Added: August 28, 2020

2012 journal article

Maternal Pre-Pregnancy Weight and Gestational Weight Gain and Their Association with Birthweight with a Focus on Racial Differences

Maternal and Child Health Journal, 17(1), 85–94.

By: K. Hunt*, M. Alanis*, E. Johnson*, M. Mayorga* & J. Korte*

author keywords: Gestational weight gaink; Racial/ethnic health differences; Obesity; Birthweight
MeSH headings : Adolescent; Adult; Birth Certificates; Birth Weight; Black People / statistics & numerical data; Body Mass Index; Body Weight / ethnology; Cross-Sectional Studies; Female; Gestational Age; Humans; Infant, Newborn; Maternal Age; Pregnancy; Prevalence; Regression Analysis; Socioeconomic Factors; South Carolina / epidemiology; Weight Gain / ethnology; White People / statistics & numerical data; Young Adult
TL;DR: A strong association between excessive GWG and higher infant birthweight across maternal BMI classes in NHW and NHB women is reported, given the high prevalence of excessiveGWG even a small increase in birthweight may have considerable implications at the population level. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (OpenAlex)
Sources: Crossref, ORCID
Added: January 21, 2021

2012 chapter

Modeling equity for allocation in public resources

In M. Johnson (Ed.), Community-Based Operations Research: Decision Modeling for Local Impact and Diverse Populations (1st ed., pp. 97–118). New York: Springer.

By: P. Leclerc, L. McLay & M. Mayorga

Ed(s): M. Johnson

Source: NC State University Libraries
Added: May 17, 2021

2012 journal article

Optimal dispatching strategies for emergency vehicles to increase patient survivability

International Journal of Operational Research, 15(2), 195.

By: D. Bandara*, M. Mayorga* & L. McLay*

TL;DR: The objective of this research is to determine how to optimally dispatch paramedic units to emergency calls to maximise patients' survivability, and forms the problem as Markov decision process to obtain the optimal dispatching policies. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: August 28, 2020

2011 journal article

A Phenomenographic Analysis of Three Real-World Experiences in Clemson University’s Industrial Engineering Program

Journal of Applications and Practices in Engineering Education.

By: G. Bhattacharyya, M. Mayorga & B. Melloy

Source: NC State University Libraries
Added: August 16, 2021

2011 journal article

Evaluating the impact of performance goals on dispatching decisions in emergency medical service

IIE Transactions on Healthcare Systems Engineering, 1(3), 185–196.

By: L. McLay* & M. Mayorga*

TL;DR: Examination of how the goal of maximizing coverage for different response time thresholds impacts patient survival rates in the context of emergency medical dispatch indicates that dispatching ambulances to maximize an eight minute response time threshold simultaneously maximizes patient survival. (via Semantic Scholar)
UN Sustainable Development Goal Categories
16. Peace, Justice and Strong Institutions (OpenAlex)
Sources: Crossref, ORCID
Added: May 17, 2021

2011 journal article

Joint management of capacity and inventory in make-to-stock production systems with multi-class demand

European Journal of Operational Research, 212(2), 312–324.

By: M. Mayorga* & H. Ahn*

author keywords: Inventory; Dynamic programming; Flexible capacity; Joint control; Multi-class demand
TL;DR: The model is formulated as a Markov decision process (MDP) and it is proved that a solution to the optimal joint control problem exists and that a simple heuristic that can adjust production capacity but uses a static production/rationing policy can result in significant savings. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: May 17, 2021

2011 journal article

The minimump-envy location problem: a new model for equitable distribution of emergency resources

IIE Transactions on Healthcare Systems Engineering, 1(2), 101–115.

By: S. Chanta*, M. Mayorga*, M. Kurz* & L. McLay*

TL;DR: The minimum p-envy facility location model is proposed which aims to find optimal locations for facilities in order to balance customers’ perceptions of equity in receiving service. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: January 24, 2021

2010 journal article

Factoring environmental concerns in supply chain decision making

International Journal of Business and Systems Research, 4(4), 469.

By: M. Mayorga* & R. Subramanian*

Sources: Crossref, ORCID
Added: August 28, 2020

2010 journal article

Metaheuristics for assortment problems with multiple quality levels

Computers & Operations Research, 37(10), 1797–1804.

By: M. McElreath*, M. Mayorga* & M. Kurz*

author keywords: Assortment planning; Metaheuristics
TL;DR: Using previous analytical results, this work approximate the optimal assortment for make-to-order and static substitution environments and test the appropriateness and compare the performance of three metaheuristic methods. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: August 28, 2020

2010 journal article

Stepping Out of Academics: The Effect of Authentic Learning Experiences on Attitudes of IE Students

Journal of Applications and Practices in Engineering Education, 1(2).

By: D. McDonnell, M. Mayorga, L. Benson & L. Mears

Source: NC State University Libraries
Added: August 16, 2021

2009 journal article

Allocating flexible servers in serial systems with switching costs

Annals of Operations Research, 172(1), 231–242.

By: M. Mayorga*, K. Taaffe* & R. Arumugam*

TL;DR: It is shown that a simpler policy which only moves one server can achieve close to optimal results in the two-station two-server case, and proposed three alternate heuristic policies are proposed. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: August 28, 2020

2009 journal article

Evaluating emergency medical service performance measures

Health Care Management Science, 13(2), 124–136.

By: L. McLay* & M. Mayorga*

author keywords: Discrete optimization; Emergency medical service; Patient outcomes; Performance measures; Health policy modeling
MeSH headings : Algorithms; Emergency Medical Services / organization & administration; Emergency Medical Services / standards; Evaluation Studies as Topic; Health Policy; Outcome Assessment, Health Care; Quality Indicators, Health Care; Virginia
TL;DR: The results indicate that locating ambulances to maximize seven and eight min response time thresholds simultaneously maximize patient survival, which results in more equitable patient outcomes, with improved patient survival rates in rural regions. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: January 21, 2021

2009 chapter

Incorporating Environmental Concerns in Supply Chain Optimization

In Environmentally Conscious Materials Handling (pp. 117–135).

By: M. Mayorga* & R. Subramanian*

Sources: Crossref, ORCID
Added: August 28, 2020

2008 journal article

Inventory based allocation policies for flexible servers in serial systems

Annals of Operations Research, 172(1), 1–23.

By: R. Arumugam*, M. Mayorga* & K. Taaffe*

author keywords: Flexible servers; Server allocation; Throughput
TL;DR: This work investigates two cases which are different in the way that servers work together when at the same station; namely collaboratively or non-collaboratively, and proves the optimal policy to be such that the servers work Together at a single station at any point in time. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: January 21, 2021

2006 journal article

Optimal control of a make-to-stock system with adjustable service rate

Probability in the Engineering and Informational Sciences, 20(4), 609–634.

By: M. Mayorga*, H. Ahn* & J. Shanthikumar*

TL;DR: The structure of optimal capacity adjustment, production, and stock rationing policy for both finite- and infinite-horizon problems is characterized and it is shown that an optimal policy is monotone in current inventory and backorder levels. (via Semantic Scholar)
Sources: Crossref, ORCID
Added: May 17, 2021

Employment

Updated: December 21st, 2023 12:17

2013 - present

North Carolina State University Raleigh, US
Professor of Personalized Medicine Industrial & Systems Engineering

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