- [2008] Reconstrucción de Superficies 3D aplicadas a imágenes médicas. LLerena Nils, Leon Leissi, Asuncion Oscar. Proceedings of VII Peruvian Computer Week (JPC2008), Lima- Perú. p. 209-220.
- [2018] A Hierarchical Layered Graph Approach for Multi-Label Segmentation in 2D Medical Images. At the first LatinX in AI Research Workshop co-located with the Thirty-Second Neural Information Processing Systems (NeurIPS) 2018, Montréal - Canada. Poster presentation.
- [2018] Efficient Interactive Multi-Object Segmentation in Medical Images. Women in Computer Vision Workshop located at the European Conference in Computer Vision (ECCV'18). Munich-Germany. Poster presentation.
- [2017] Multi-Object Segmentation by Hierarchical Layered Oriented Image Foresting Transform. 30th SIBGRAPI Conference on Graphics, Patterns and Images (SIBGRAPI), Niteroi- Brazil. Oral presentation.
- [2017] Participation at Colloquium of Inteligência Artificial organized by the IBM Research Brazil. Sao Paulo, Brazil.
- [2014] Computer Vision applied to Social Behavior Recognition in Videos. The 10th IEEE International Conference on e-Science, IEEE e-Science 2014, Guarujá, Brazil. Poster presentation.
- [2013] Detecção de objetos em vídeos usando misturas de modelos baseados em partes deformáveis obtidas de um conjunto de imagens. XX Concurso Latinoamericano de Tesis de Maestrías (CLTM - CLEI 2013) (Congresso). Caracas-Venezuela. Oral presentation.
- [2012] Vehicle detection using mixture of deformable parts models: Static and dynamic camera. 25th SIBGRAPI Conference on Graphics, Patterns and Images (SIBGRAPI), Ouro Preto- Brazil. Oral presentation.
- [2012] Two Applications of Mixture of Deformable Parts Models to Vehicle Detection (Poster). Visual Recognition and Machine Learning Summer School (INRIA). Grenoble-France. Poster presentation.
- [2011] Pattern classification using bayesian decision theory. II Encuentro Académico Empresarial de Ciencia de la Computación, National University of Trujillo-Peru. Oral presentation.
- [2009] Image tagging using a scale invariant feature transform. Leon Leissi and LLerena Nils. III Jornada Académica de Investigaciones, National University of Trujillo-Peru. Oral presentation.
- [2009] Writing papers. Primer Evento del Capítulo CIIS-UPN, Universidad Privada del Norte, Trujillo-Peru. Oral presentation.
- [2008] Reconstrucción de Superficies 3D aplicadas a imágenes médicas. LLerena Nils, Leon Leissi, Asuncion Oscar. Proceedings of VII Peruvian Computer Week (JPC2008), Lima- Perú. Oral presentation.
- [2007] An expert system for personality classification. Leon Leissi and LLerena Nils. II Semana de Ciencia de la Computación, National University of Trujillo, Peru. Oral presentation.