Hajar Hajmohammadi

My research project is about understanding and quantifying the effects of a primary care intervention on patients with asthma in East London. I am responsible for data extraction from medical information systems, data management and analysis, and statistical modelling. I am using Interrupted Time Series (ITS) and categorical regression to establish a link between primary care data and hospital admission of patients with asthma. Along with this, I am investigating the temporal relationship between air pollution and asthma exacerbation, and developing a time series analysis model.

About me

Image

With a background in civil and transportation engineering, I started my PhD in transport studies at University College London in 2015. I continued my research in transport and air quality as a Research Fellow there after graduation, and then joined Clinical Effectiveness Group (CEG), Queen Mary University of London as a Senior Data Analyst in 2020.

Publications

• Hajar Hajmohammadi, Benjamin Heydecker Multivariate time series modelling for urban air quality Urban Climate, Volume 37, 2021, 100834, ISSN 2212-0955, DOI: 10.1016/j.uclim.2021.100834.
• Hamid Salehi, Vikram Karde, Hajar Hajmohammadi, Susantha Dissanayake, Sylvia H. Larsson, Jerry Y.Y. Heng, Mike Bradley Understanding flow properties of mannitol powder at a range of temperature and humidity International Journal of Pharmaceutics, Volume 596, 2021, 120244, ISSN 0378-5173, DOI: 10.1016/j.ijpharm.2021.120244.
• Hajar Hajmohammadi, Giampiero Marra, Benjamin Heydecker Data-driven models for microscopic vehicle emissions Transportation Research Part D: Transport and Environment, Volume 76, 2019, Pages 138-154, ISSN 1361-9209, DOI: 10.1016/j.trd.2019.09.013.
• Hajmohammadi, H., Afandizadeh Sh., Kalantari, N., Application of Genetic Algorithm for Coordinating Variable Speed Limits and Ramp Metering, Journal of Transportation Research, Vol. 9, May 2012
• Hajmohammadi, H., Afandizadeh Sh., Kalantari, N., Study and Assessment of Methods of Coordinating Ramp Metering and Variable Speed Limit, Journal of Traffic Engineering, Vol. 12, Jan. 2012
• Hajmohammadi, H., Afandizadeh Sh., Dehghani, N., A Signal Coordination Model for Oversaturated and Under Saturated Arterials, Journal of Traffic Engineering (in Persian), Vol.12, May 2011.

Research activity

Conferences

• Hajmohammadi, H., Marra, G., Heydecker, B.G., “Nonlinear Vehicle Emission Modelling for Urban Areas”, Transportation, Air Quality, and Health Symposium (CARTEEH), Texas A&M transportation institute, Texas, Austin, Feb. 2019.
• Heydecker, B.G., Hajmohammadi, H., Marra, G., “Microscopic Modelling of Vehicle Emissions: Beyond Generalised Linear Models”, 23^rd International Conference of the Hong Kong Society for Transportation Studies: Transportation Systems in the Connected Era, Hong Kong, Dec. 2018.
• Hajmohammadi, H., Heydecker, B.G., “A Gear-Based Vehicle Emission Model for CO₂, CO and NO_x Estimation”, Mathematics Applied in Transport and Traffic Systems (MATTS) Conference, TU Delft, Netherland, Oct. 2018.
• Hajmohammadi, H., Heydecker, B.G., “Classified Vehicle Emission Model for Predicting CO₂, CO and NO_x in Urban Roads”, 49^th Annual UTSG Conference, Trinity College Dublin, Ireland, Jan. 2017.
• Khavarzadeh, R, Kalantari, N., Hajmohammadi, H., “A Predictive SARIMA Model for PM₁₀ and PM_2.5 levels in the City of Mashhad Based on Traffic Flow and Meteorological Data”, 14^th International Conference on Traffic and Transportation Engineering, Tehran, Iran, Feb. 2015.
• Hajmohammadi, H., Afandizadeh Sh., Kalantari, N., “A Meta-Heuristic Approach to Optimal Coordinated Design of Variable Speed Limits and Ramp Metering”, 10^th Conference of Advances in Civil Engineering (ACE), Ankara, Turkey, Oct. 2012.
• Hajmohammadi, H., Afandizadeh Sh., Dehghani, N., “Signal Coordination in the Oversaturated and Under Saturated Arterials, Case Study: Beheshti Corridor”, 10^th International Conference of Traffic and Transportation Engineering, Tehran, Iran, Nov. 2011.

Follow Hajar

Hajar's LinkedIn profile

Hajar's ResearchGate profile