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- Exploring forms of disaggregating Covid-19 data: an examplePublication . Leal, Maria da Conceição Dias; Oliveira, Teresa; Mukherjee, Amitava; Oliveira, AmilcarCOVID-19 data provided by Portuguese public health authorities lack consis tency in periodicity and metrics. To facilitate time series analysis, we transformed those data to achieve homogeneous periodicity and metrics. We present one method we used and assess the potential introduced bias and its impact on spatial distribution models of COVID-19 in Portugal, using spatial and non-spatial models. Comparing models fitted with transformed data to those with observed data for two specific days, we found no clear evidence of a worse fit for the disaggregated data.
- C.R. Rao: a beacon of excellence in statistical research and practicePublication . Oliveira, TeresaThis talk shines a spotlight on the remarkable achievements of C.R. Rao, an eminent statistician and mathematician, whose contributions have illuminated the field of statistics and related areas. Rao's transformative ideas in estimation theory, sufficiency and completeness, experimental design, biometry and data science, have revolutionized the way researchers approach data analysis and interpretation. Furthermore, his mentorship and educational efforts have fostered the growth of countless statisticians, ensuring his legacy will continue for generations to come. The article underscores Rao's exceptional impact and highlights his numerous prestigious awards, solidifying his place as a beacon of excellence in the field. Some of the Rao's pivotal role in shaping the future of statistical research and practice will be presented.
- Program Book: 2023 IMS International Conference on Statistics and Data Science (ICSDS)Publication . Gomes, Maria Ivette; Oliveira, Teresa A.; Oliveira, Amilcar; Pestana, Pedro Duarte; Xu, MinIn response to the call from the 2021 IMS (Institute of Mathematical Statistics) Survey report to expand membership from emerging areas of data science, underrepresented groups, and from regions outside of North America, the IMS has launched the annual IMS International Conference on Statistics and Data Science (ICSDS). Following the success of 2022 ICSDS in Florence Italy, December 13-16. 2022, the second and this 2023 ICSDS is held on December 18-21, in Lisbon, Portugal. In addition to plenary sessions, invited, contributed and poster sessions, ICSDS offers a student paper competition for 12 Student Travel Awards. There are also Junior Researcher Support Funds for travel support for junior researchers. We gratefully acknowledge here the generous support for both awards from the funds of Industry Friends of IMS (IFoIMS). Students and young researchers are strongly encouraged to participate and utilize this support. The ICSDS conference has been thoughtfully organized to provide platforms to facilitate discovery dissemination and foster collaborations among researchers from a wide range of research and practice areas in statistics and data science, and from academia, industry and government. We are gratified to be able to welcome to the ICSDS more than 550 participants coming from more than 40 countries. The goal of the ICSDS is to afford such a diverse crowd a stimulating setting for exchanging ideas on the developments of modern statistics and data science, broadly defined, in all aspects of theory, methods and applications. The Local Organizing Committee in Lisbon, the beautiful capital city of Portugal, has worked hard to find the modern Cultural Center of Belém (CCB) in Belém area for us to host the ICSDS this year. CCB is located near where Tagus River meets the Atlantic Ocean, and it is surrounded by many magnificent landmarks, including Tower of Belém and Mosteiro dos Jerónimos. This location conveniently affords the conference participants rich social programs, including conference tours to Mosteiro dos Jerónimos and Tower of Belém, both are UNESCO World Heritage Sites, and are historical and architectural treasures for the world. We are also able to organize a conference banquet in the charming Casa do Alentejo to enjoy the local cuisine and the renowned Portuguese traditional Fado music performance. Participants are also highly encouraged to take advantage of the close proximity to “Pastéis de Belém” from CCB to enjoy the world famous Portuguese tarts. Many other wonderful things to do, eat and see in Lisbon can also be found in https://www.timeout.com/lisbon. We wish that the 2023 ICSDS proves to be another productive conference that will successfully cultivate more fruitful exchanges and collaborations for years to come. Acknowledgement: Needless to say, an international conference of this scale, with its coverage of wide-ranging subjects and size of broad participants from various disciplines across the world, would not have been possible without the collective efforts of many. We would like to thank the program committee, of 50 members from 29 countries, for helping establish the rich program. The Local Organizing Committee: Eunice Carrasquinha (Co-chair, CEAUL-FCUL), Ivette Gomes (Co-chair, CEAUL-FCUL), Tiago Marques (University of St Andrews, UK), Teresa A. Oliveira (Co-chair, CEAUL and Universidade Aberta), Soraia Pereira (CEAUL, Universidade de Lisboa), Giovani Silva (IST, CEAUL, Universidade de Lisboa), Lisete Sousa (Universidade de Lisboa), have contributed their tremendous effort and time in every aspect of this endeavor, from helping organize sessions, finding conference venue to all the logistics up to the very last minute, including banquet and tours. In particular, Ivette and Teresa brilliantly turned the messy and long conference program into a beautifully organized program book. Our heartfelt thanks also go to Elyse Gustafson (IMS Executive Director) for her working overtime on the financial issues and other related formalities on behalf of the IMS, and to Arlene Gray (Administrator, ICSDS) for her patiently taking care of the nonstop inquiries and tracking numerous responses and requests from the participants and the conference organizing team. Finally, we would be remiss not to acknowledge the invaluable contributions behind the scenes from Min Xu (IMS, Rutgers University), from setting up and managing the conference website, negotiating IT support with the conference venue, to setting up the program and readying all the slides. He bravely and efficiently met head on all kinds of unexpected challenges, technical as well as personal. It suffices to say that Min did all the heavy-lifting to make the conference program a reality for us all to enjoy.
- Assessing dental symmetry: introduction of the Symmetry Measure Score (SMS) in periodontal disease analysisPublication . Pereira, J. A.; Mubayi, Anuj; Carvalho, Davide; Oliveira, Teresa
- Application of BIBDR in health sciences using RPublication . Oliveira, Teresa; Oliveira, AmilcarThe role of Experimental Design is very well known, considering applications to a broad range of areas, such as Agriculture, Biology, Medicine, Industry, Education, Economy, Engineering and Food Consumption Sciences. Motivated by the variety of problems faced in the several areas and simultaneously taking advantage of the emerging technological developments, new theoretical results, as well as new designs and structures, have been developed by researchers and practitioners accordingly to the needs. Experimental Design got a place among the most important statistical methodologies and, mainly because of allowing to separate variation sources, since the last century it has been strongly recommended for Health Sciences studies. In this area, particular attention has been devoted to Randomized Complete Block Designs and to Balanced Incomplete Block Designs (BIBD) - which allow testing simultaneously a number of treatments bigger than the block size. Thus, after a brief review of some particular BIBD properties and of BIBDR - Balanced Incomplete Blocks with Block Repetition, an applications to Health Sciences simulated data is illustrated, by exploring R software
- Product of two normal variables: an historical reviewPublication . Seijas-Macias, J. Antonio; Oliveira, Amilcar; Oliveira, TeresaThis paper presents a study of the evolution the study of the product of two normally distributed variables. From first approaches in the middle of the 20th Century until the most recent ones from this decade. Nowadays, existence of an unique formula for the product was not proved. Partial results using di erent approaches: Bessel Functions, Numerical Integration, Pearson Type Function.
- Multilevel modeling techniques to study the impact of environmental changes on human face developmentPublication . Amorim, Mónica; Godinho, Joana; Oliveira, TeresaEnvironmental changes leading to different growth patterns of allergenic species, longer pollen seasons, deterioration of indoor and outdoor air quality have reportedly increased allergic rhinitis and viral infections in children which may lead to facial growth problems. The airway has a relevant role in the development of craniofacial structures, thus, in this work, we intended to model the mandibular inclination in growing individuals, considering sagittal pharyngeal characteristics and other craniofacial characteristics as predictors. Angular, linear and area measurements were performed concerning the maxilla, mandible, cranio-cervical posture and upper airway at pre-peak, peak and post-peak cephalograms, in a sample of 157 individuals with no history of orthodontic treatment. Mandibular inclination (ML/NSL) was adjusted as a function of other craniofacial variables using a longitudinal hierarchical linear model (MLH). Two relevant adjustments with random intercepts and slopes were obtained for the time variable. Modelling with MLH allowed for the estimation of fixed and random components at the individual level, the time level for ML/NSL and the influence of certain predictors on the rate of change of ML/NSL throughout growth were explored. The application of MLH is recommended to allow the incorporation of clinical and environmental variables during growth and to better clarify the role of the airway in the development of craniofacial structures.
- Application of information geometry in incomplete block designs: towards statistical efficiencyPublication . Cardoso, Carla; Oliveira, Amilcar; Oliveira, Teresa
- Pensamento computacional nos trabalhos do Encontro Nacional de Educação Matemática: um mapeamento sistemático de 2013 a 2019Publication . Bueno, Carolina; Santos, Luciane Mulazani dos; Oliveira, TeresaO presente trabalho tem como objetivo apresentar um panorama a respeito de trabalhos relacionados ao pensamento computacional nas últimas três edições do ENEM (Encontro Nacional de Educação Matemática). Para tanto, foi realizado um mapeamento sistemático com os anais dos ENEMs e realizada uma busca utilizando os termos pensamento computacional, robótica e programação, presentes nos títulos de todos os trabalhos publicados como pôsteres e comunicações orais (comunicações científicas e relatos de experiência). Os resultados mostraram que dos 4878 trabalhos encontrados, apenas 26 se enquadram nos critérios de seleção. Tais trabalhos foram analisados quanto aos seguintes aspectos: ano de publicação, referenciais teóricos utilizados e público-alvo. O que se conclui é que há uma carência de pesquisas que discutem o pensamento computacional e a matemática.
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