Dr. Lianfen Qian is a distinguished biostatistician and Professor of Practice at the University of Arizona, with extensive expertise in developing and applying statistical methodologies to biomedical, environmental, and genomic research. She earned her B.S. and M.S. in Mathematics and Statistics from Zhejiang University, China, and her Ph.D. in Statistics from Michigan State University. Dr. Qian’s research focuses on survival analysis, longitudinal data modeling, semi-competing risks, and structural change detection. Her work has been widely published in leading journals such as Biometrika, Computational Statistics & Data Analysis, and Frontiers in Cellular and Infection Microbiology. A seasoned educator and mentor, she has guided numerous Ph.D. and M.S. students, with one of her mentees earning first place in the 2015 ASA/CAUSE Undergraduate Research Project Competition. She has also served in leadership roles for the American Statistical Association’s South Florida Chapter and contributed as an NSF panelist. Dr. Qian’s career includes academic appointments at Florida Atlantic University and Lynn University, along with her leadership of Mathematics and Data Science, LLC. Her numerous honors include the ASA Award for Outstanding Chapter Service, NSF travel and research awards, and recognition in Who’s Who in America. She has collaborated on research projects funded by the NSF, NCI, and DoD, and continues to contribute to advancing data-driven research and interdisciplinary science. (Document: Lianfen Qian,
Profiles: Scopus | ORCID | Google Scholar
Featured Publications
1. Heilmayer, O., Digialleonardo, J., Qian, L., & Roesijadi, G. (2008). Stress tolerance of a subtropical Crassostrea virginica population to the combined effects of temperature and salinity. Estuarine, Coastal and Shelf Science, 79(1), 179–185. Cited by 100.
2. Wang, S., Qian, L., & Carroll, R. J. (2010). Generalized empirical likelihood methods for analyzing longitudinal data. Biometrika, 97(1), 79–93. Cited by 78.
3. Koul, H. L., Qian, L., & Surgailis, D. (2003). Asymptotics of M-estimators in two-phase linear regression models. Stochastic Processes and Their Applications, 103(1), 123–154. Cited by 72.
4. Gan, W., Bragg, F., Walters, R. G., Millwood, I. Y., Lin, K., Chen, Y., Guo, Y., … (2019). Genetic predisposition to type 2 diabetes and risk of subclinical atherosclerosis and cardiovascular diseases among 160,000 Chinese adults. Diabetes, 68(11), 2155–2164. Cited by 71.
5. Xu, Y., Chen, B., Qian, W., & Li, H. (2013). Properties of pure n-butylammonium nitrate ionic liquid and its binary mixtures with alcohols at T = 293.15 to 313.15 K. The Journal of Chemical Thermodynamics, 58, 449–459. Cited by 70.
Senior Research Fellow | Jomo Kenyatta University of Agriculture and Techno | Kenya
Dr. Amos Kipkorir Langat, Ph.D., is a highly accomplished statistician, academic, and economist with expertise in Bayesian analysis, machine learning, spatial statistics, and public health modeling. He earned his Ph.D. in Mathematics (Statistics) from the Pan African University Institute for Basic Sciences, Technology and Innovation, his MSc. in Applied Statistics from Jomo Kenyatta University of Agriculture and Technology (JKUAT), and his BSc. in Economics and Mathematics from Kabarak University. Currently, he serves as a Lecturer at JKUAT and Senior Economist at the County Government of Bomet, with previous teaching roles at Maasai Mara and Kabarak Universities. His research spans statistical modeling of infectious diseases, HIV risk factors, maternal health, survival and time series analysis, and measurement error models. He has supervised MSc. and Ph.D. students across Africa, authored over 30 peer-reviewed publications, and contributed to journals such as Scientific African, Asian Journal of Probability and Statistics, and Annals of Medicine & Surgery. Dr. Langat has secured prestigious awards including the AU Ph.D. Scholarship and SICSS research funding, and he actively contributes as a reviewer and conference organizer. His technical expertise includes proficiency in R, Python, STATA, SAS, SPSS, WinBUGS/OpenBUGS, and advanced econometric tools. A member of the Royal Statistical Society, ISCB, IBS, and the Kenya National Statistical Society, he also demonstrates a strong commitment to community service through educational leadership roles. Dr. Langat exemplifies a dedicated scholar, mentor, and researcher advancing applied statistics in public health and beyond
Profile: Google Scholar | Scopus | Orcid
Featured Publications
1. Langat, A., Orwa, G., & Koima, J. (2017). Cancer cases in Kenya; forecasting incidents using Box & Jenkins ARIMA model. Biomedical Statistics and Informatics, 2(2), 37–48. Cited by: 21
2. Benki-Nugent, S. F., Martopullo, I., Laboso, T., Tamasha, N., Wamalwa, D. C., … [and others]. (2019). High plasma soluble CD163 during infancy is a marker for neurocognitive outcomes in early-treated HIV-infected children. JAIDS Journal of Acquired Immune Deficiency Syndromes, 81(1), 102–109. Cited by: 14
3. Mutinda, J. K., & Langat, A. K. (2024). Stock price prediction using combined GARCH-AI models. Scientific African, 26, e02374. Cited by: 10
4. Mutinda, J. K., & Langat, A. K. (2024). Modeling the impact of air pollution and meteorological variables on COVID-19 transmission in Western Cape, South Africa. International Journal of Mathematics and Mathematical Sciences, 2024(1), 1591016. Cited by: 5
5. Mutinda, J. K., & Langat, A. K. (2024). Capital asset pricing model: A renewed application on S&P 500 index. Asian Journal of Economics, Business and Accounting, 24(6), 226–239. Cited by: 4
Ph.D.Researcher at Abubakar Tafawa Balewa University Bauchi ,Nigeria
Timothy Waje is a dedicated Nigerian professional with a strong commitment to health education, disease control, and research. He blends leadership, strategic planning, and organizational skills in both academic and field environments. Known for his work in neglected tropical diseases, his career spans public health, microbiology, and institutional leadership. Timothy has excelled in managing complex projects under pressure, fostering collaborations, and achieving measurable results in challenging environments across northern Nigeria. His multidisciplinary approach combines scientific research, policy engagement, and grassroots mobilization. With a natural ability to train and lead, he continuously drives health improvements through capacity-building initiatives and innovative solutions. His familiarity with Nigeria’s diverse regional contexts enhances his effectiveness in community engagement and program implementation. In every role, Timothy demonstrates integrity, dedication, and a passion for public service, making him an influential figure in the health and research sectors.
Professional Profile
Scopus
Education
Timothy Waje has pursued a progressive academic path rooted in microbiology and public health. His foundational studies equipped him with deep knowledge in applied microbiology, research methodology, and epidemiology. Through advanced degrees, he developed expertise in medical microbiology and expanded his understanding of infectious disease control, biostatistics, and public health systems. His academic journey is marked by continuous learning and critical thinking, supported by hands-on training in laboratory sciences and data analysis. Waje’s education reflects a clear alignment with his professional focus, as he explored both theoretical and practical aspects of disease transmission, diagnostics, and community-based health strategies. He has also acquired strong competencies in research design, data interpretation, and scientific communication. These qualifications have not only enhanced his academic credentials but also strengthened his leadership in public health interventions, particularly in northern Nigeria. His commitment to education continues to shape his impact as a trainer, researcher, and mentor in the field.
Experience
Timothy Waje brings a wealth of experience across the fields of public health, microbiology, education, and banking. As a provost, he has overseen administrative and academic functions, trained staff, led institutional governance, and taught core subjects in microbiology and disease control. In public health, he has served as a consultant and field expert on multiple neglected tropical diseases programs, successfully conducting surveys, monitoring treatments, and leading community mobilization. His roles have involved supervising data collection, analyzing survey outcomes, and managing implementation logistics. He has also played critical roles in organizing training sessions, facilitating capacity development, and interacting with government and health agencies. Before transitioning into health leadership, Timothy worked in the banking sector, where he excelled in customer service, compliance, operations, and financial management. Across sectors, his ability to lead, organize, and meet deliverables under pressure has distinguished his career. He adapts easily, solves problems strategically, and mentors others effectively in various roles..
Research Focus
Timothy Waje’s research is grounded in medical microbiology, infectious diseases, and epidemiology, with a special focus on public health concerns in northern Nigeria. His work addresses key health challenges such as cytomegalovirus, lymphatic filariasis, hepatitis viruses, malaria, and Campylobacter infections. Through reviews, clinical studies, and laboratory-based investigations, he examines pathogen prevalence, molecular patterns, genetic diversity, and drug resistance. His research combines both quantitative and qualitative methodologies, often informed by real-world public health interventions. Waje contributes to understanding the spread, diagnosis, and control of diseases that affect vulnerable populations. His investigations aim to inform evidence-based decision-making, improve diagnostics, and support targeted interventions in community settings. He is especially interested in diseases with socioeconomic impacts, focusing on prevention, early detection, and sustainable health education. Waje collaborates with academic, governmental, and international organizations, and is committed to sharing knowledge that advances both science and the practical management of infectious diseases.
Publication Top Notes
Title: Occurrence of Cytomegalovirus among Pregnant Antenatal Women within Bauchi Metropolis, Nigeria
Journal: Clinical Epidemiology and Global Health
Summary:
This study investigates the presence and prevalence of cytomegalovirus (CMV) infection among pregnant women attending antenatal clinics in Bauchi, Nigeria. The research focuses on understanding the epidemiological patterns and potential health implications of CMV infections during pregnancy. Utilizing serological testing methods, the study evaluates CMV exposure levels in a representative sample of pregnant women. The findings contribute to public health awareness regarding maternal CMV infection and stress the need for routine screening in antenatal care settings to reduce potential risks to maternal and fetal health.
Conclusion
Timothy Waje stands out as a versatile professional with a rare combination of academic rigor, field experience, and organizational leadership. His journey reflects a commitment to service, whether through education, scientific research, or health program implementation. In every role, he promotes teamwork, quality delivery, and continuous learning. Waje’s work contributes meaningfully to disease control, institutional development, and capacity building in underserved areas. His interdisciplinary expertise and regional familiarity position him to address complex health challenges with culturally sensitive and evidence-based strategies. Beyond technical skills, his strong ethical foundation, communication abilities, and leadership qualities inspire those he works with. As he continues to advance in research and academic pursuits, his impact is felt across public health, education, and community engagement landscapes. Timothy Waje exemplifies the qualities of a dedicated scholar, capable administrator, and transformative health advocate who consistently strives for excellence, collaboration, and the betterment of society through knowledge and service.