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Rafael R PhD
@rafreis
Top Rated
Data is the new oil!
Brésil
Anglais
À propos de moi
Hi, I’m Rafael—a data scientist, researcher and professor with 10+ years of experience turning complex data into clear insights. I hold a PhD from the University of Leeds and have partnered with researchers, NGOs and businesses to solve real-world challenges using R, SPSS and Python, from statistical modelling and machine learning to experimental design. As author of 16 peer-reviewed papers, I guarantee methodological rigor, reproducibility and actionable results. Let’s connect and drive your project forward!
Compétences
Rafael R PhD
50 $US/heure
hors ligne •
Temps de réponse moyen de 1 heure
Voir mes services
Modélisation et analyse statistique
I will perform statistical data analysis with spss, r, or python
Machine learning
I will build and evaluate a machine learning model in python or r
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Dites à Rafael R PhD ce dont vous avez besoin.
50 $US
/
heurePortfolio
Expérience professionnelle
Unlisted
Temps partiel • 4 yrs 5 mos
Professor of Data Science
Aug 2022 - Dec 2023 • 1 yr 4 mos
Company: Sirius Education Taught data science and quantitative methods remotely — statistics, R/Python and applied analytics.
Data Scientist
Mar 2020 - Apr 2023 • 3 yrs 1 mo
Company: SENAI (National Service for Industrial Training) Built COVID-19 case-forecasting models powering a public-health decision dashboard (Monitora-Covid19). Designed a survey and a predictive infection-risk model to optimize PCR testing via risk-based sample pooling, reducing reagent use on low-probability cases. Delivered analytics and visualizations to support data-driven public-health decisions.
Doctoral Researcher (PhD)
Leeds • Temps plein
May 2016 - Dec 2019 • 3 yrs 7 mos
Company: Leeds Institute for Data Analytics PhD research on behaviour change and sustainable mobility (EMPOWER, EU Horizon 2020). Designed and analyzed a large-scale survey (920 respondents), applied behavioural-science theory (Theory of Planned Behaviour, Norm-Activation Model) and psychographic segmentation (cluster + discriminant analysis), and modeled determinants of travel behaviour. Published peer-reviewed work; conducted thesis analytics within the Leeds Institute for Data Analytics (LIDA).
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Les plus pertinents
achievingskills
États-Unis
I had a very positive experience working with Rafael on a methodological review of our grant Letter of Inquiry. His professionalism was evident throughout the entire process—communication was clear, expectations were well-defined, and he approached the work with a high level of integrity and respect...
Utile?
giacomo901
Client récurrent
Finlande
The statistical data analysis was conducted successfully and produced clear, reliable results. The data was carefully organized and analyzed using appropriate statistical methods, allowing meaningful patterns and trends to be identified. The findings supported the objectives of the study and were presented...
Utile?
vlt_dsm
Belgique
Rafael completed an order for a statistical analysis (GLMM and LMM) in 2 days that had a 4 day deadline, and provided an extensive analysis report complete with tables, effect sizes and , multiple, detailed figures and annotated code.
Utile?
h_n3105
Client récurrent
Royaume-Uni
Very smooth process, Rafael was very attentive and went above and beyond for me. He helped me make sense of a dataset that was very overwhelming and has been very supportive and honest with any follow up questions I have had. I would definitely recommend Rafael for any project and would be more than happy to trust him with any future projects :)
Utile?
giacomo901
Client récurrent
Finlande
Rafael was highly responsive and detail-oriented throughout the process. He addressed all comments thoroughly, provided clear explanations for each correction, and ensured full consistency across the analysis and documentation. His proactive approach and attention to detail made the collaboration smooth and efficient.
Utile?
