PhD in Informatics Seminar

Recommender systems for scientific items: a Hybrid semantic recommender algorithm for chemical compounds

Transmissão através de Videoconferência

Speaker: Márcia Barros.

Abstract: Recommender systems have been widely used in fields such as movies, music and online stores, however, they are poorly applied to scientific fields. We identified as one of the main challenges for using recommender systems in scientific fields, the lack of datasets suitable for evaluating recommender algorithms. In previous work, we overcame this challenge by developing a new methodology called LIBRETTI (LIterature Based RecommEndaTion of scienTific Items). LIBRETTI allows the creation of standard datasets of implicit feedback with the format of , where the users are authors from research papers, the items are scientific items, such as chemical compounds, genes, or phenotypes, and the ratings are the number of papers an author wrote about an item. We have now as case studies a dataset in the field of Astronomy, and a dataset in the field of Chemistry. With these dataset available, it is now possible to start testing and developing new recommender algorithms. Thus, this seminar will present a Hybrid recommender model for recommending Chemical Compounds. The Hybrid model integrates state-of-the-art collaborative-filtering algorithms for implicit feedback and a new content-based algorithm, based on the semantic similarity between the Chemical Compounds in the ChEBI ontology. This model was evaluated using the dataset of implicit feedback of Chemical Compounds, CheRM, created through LIBRETTI.

More information: https://moodle.ciencias.ulisboa.pt/course/view.php?id=2228#section-2.

z(r)oom: https://videoconf-colibri.zoom.us/j/98030464254.


Seminars of the PhD in Informatics 2019/2020

PhD students, faculty, MSc and BSc students, are all invited to attend. This is an excellent opportunity for cross-disciplinary development through presentation and discussion of edge research going on in our department.

Please make space in your agenda an save the date, even if the subject is apparently not directly related to your research. You may be surprised with the bridging opportunities that pop up, and the PhD student will benefit from comments that we all can make.

Moreover, we all should adopt the scientific culture of attending our most advanced regular seminars and of providing our feedback to the speakers.

12h00
Departamento de Informática
Sonhos: A noite em quatro tons

O Coro da Universidade de Lisboa apresenta Sonhos - A noite em quatro tons, um concerto virtual dividido em quatro momentos que vão trazer música às noites de sábado de Agosto.

Sonhos: A noite em quatro tons

O Coro da Universidade de Lisboa apresenta Sonhos - A noite em quatro tons, um concerto virtual dividido em quatro momentos que vão trazer música às noites de sábado de Agosto.

Sonhos: A noite em quatro tons

O Coro da Universidade de Lisboa apresenta Sonhos - A noite em quatro tons, um concerto virtual dividido em quatro momentos que vão trazer música às noites de sábado de Agosto.

Este encontro científico visa dar a conhecer o trabalho dos membros do Centro de Matemática, Aplicações Fundamentais e Investigação Operacional (CMAFcIO), bem como o de colegas de áreas afins pertencentes a outras Unidades de Investigação e promover, na medida do possível, a in

Logótipo do evento, sobre um fundo branco

New date: September 14th-16th, 2020.

O principal objetivo desta iniciativa centra-se em atrair fotógrafos profissionais e amadores a submeter trabalhos de excelência produzidos em Portugal e nos países africanos de língua oficial portuguesa (PALOP) e fomentar práticas de observação, conhecimento e registo através

O cE3c - Centro de Ecologia, Evolução e Alterações Ambientais está mais uma vez a organizar o Seminário cE3c I, que irá decorrer no 1.º semestre do ano letivo 2020/2021 na Faculdade de Ciências.

Ciências ULisboa associa-se ao maior evento mundial sobre inovação para a sustentabilidade - “The Planetiers World Gathering” - que terá lugar no Altice Arena entre 21 e 23 de outubro de 2020, sob os auspícios da

Fotografia de caminhantes numa montanha

Programa de Formação Contínua de Professores do Ensino Básico (3.º ciclo) e Secundário, grupos 420 e 520.

Leitura e escrita são a base fundacional de todas as literacias e a condição primeira para o juízo compreensivo e crítico, o enriquecimento cultural, a formação estética e a memória individual e coletiva das sociedades.

Objectives: Evolutionary theory provides a framework for understanding all living systems.

Overview: Currently, climate changes or alterations are known to be reflected on the stable isotope ratios of Hydrogen, Nitrogen, Carbon, Oxygen and Sulphur present in atmospheric gas forms, fresh or ocean water, as well as in plants and animals and organi

Objectives: To introduce participants to the details of communicating science to non-specialized audiences, including, but not exclusive to, public and private stakeholders, students and teachers, and media professionals.

Objectives: Natural history museums are privileged spaces for seminal research on different subjects of biological sciences such as biodiversity, evolution, ecology, biogeography and taxonomy.

Objectives: Provide students with basic workflows, platforms and tools to increase reproducibility at all scientific levels.

Objectives: Under the general framework of Global Change Ecology, the goal of this course is to provide the participants with the most recent and practical knowledge on the use of Functional Diversity.

Objectives: The objective of this course is to introduce participants to the details of communication and writing scientific publications. The main emphasis is on the most common form, the “primary scientific paper”, but other forms will be covered.

Objectives: Lack of fertile land to feed the exponentially growing population, insufficient water availability and quality, changes in the flow of nutrients through the bio-geo-cycles (especially N and P) and climate and land use changes are impacting ecosystem

Objectives: Symbiosis is a key strategy for life on Earth.

Objectives: The goal of this course is to provide to the participants with current and practical knowledge on urban ecology, including ecological and social aspects. It aims at providing an integrated approach on urban socio-ecological systems.

Objectives: Citizen science can be part of the larger process of engaging people in new forms of interaction in scientific research, challenging scientists and citizens whilst enlarging scientific knowledge and providing learning opportunities for all part

Objectives: This course aims at: 1) exploring how scientists can use social media as tools to enhance the communication of their research and the dialogue with society, and 2) discussing the differences that exist in the work of scientists and journalists

Objectives: This course will teach how to apply the SWAT eco-hydrological model to assess the impacts of climate and associated changes on water-soil-plant interactions, and consequences to water resources, soil erosion and nutrient cycles.

Objectives: Provide students with basic knowledge of R programming, allowing them to manipulate and visualize data with R.

Objectives: Provide students with statistical knowledge and tools to manipulate, analyze and visualize biological data with R. Introduction to modeling, simulations and Bayesian statistics.

Páginas