research overview

selected publications

CAD
design in virtual reality


R. de Klerk, A.M. Duarte, D.P. Medeiros, J.P. Duarte, J.A. Jorge, D.S. Lopes, Usability studies on building early stage architectural models in virtual reality, Automation in Construction, 103, Pages 104–116, 2019. DOI: 10.1016/j.autcon.2019.03.009

CAD
shape analysis


D.S. Lopes, S.M. Pires, V.V. Mascarenhas, M.T. Silva, J.A. Jorge, On a "Columbus' Egg": Modeling the Shape of Asymptomatic, Dysplastic and Impinged Hip Joints, Medical Engineering & Physics, ...(...), Pages ...–..., 2018. DOI: 10.1016/j.medengphy.2018.07.001

CG
motion processing


C. Massaroni, D.S. Lopes, D. Lo Presti, E. Schena, S. Silvestri, Contactless monitoring of breathing patterns and respiratory rate at the pit of the neck: a single camera approach, Journal of Sensors, ...(...), Pages ...–..., 2018. DOI: ...

Medical UI/UX
immersive radiology


D.S. Lopes, D. Medeiros, S.F. Paulo, P.B. Borges, V. Nunes, V. Mascarenhas, M. Veiga, J.A. Jorge, Interaction Techniques for Immersive CT Colonography: A Professional Assessment, In: Frangi AF, Schnabel JA, Davatzikos C, Alberola-Lopez C, Fichtinger G. (eds) Medical Image Computing and Computer Assisted Intervention - MICCAI 2018. MICCAI 2018. Lecture Notes in Computer Science, ...(...), Pages ...–..., Springer, Cham, 2018. DOI: ...

CG
graphical user interfaces


D.S. Lopes, R.K. dos Anjos, J.A. Jorge, Assessing the usability of tile-based interfaces to visually navigate 3-D parameter domains, International Journal of Human-Computer Studies, ...(...), Pages ...–..., 2018. DOI: 10.1016/j.ijhcs.2018.05.005

Medical UI/UX
volume graphics


D.S. Lopes, P.F. Parreira, A.R. Mendes, V.M. Pires, S.F. Paulo, C.S. Sousa, J.A. Jorge, Explicit design of transfer functions for volume-rendered images by combining histograms, thumbnails and sketch-based interaction, The Visual Computer, ...(...), Pages ...–..., 2017. DOI: 10.1007/s00371-017-1448-8

Medical UI/UX
touchless interface


D.S. Lopes, P.F. Parreira, S.F. Paulo, V. Nunes, P.A. Rego, M.C. Neves, P.S. Rodrigues, J.A. Jorge, On the utility of 3D hand cursors to explore medical volume datasets with a touchless interface, Journal of Biomedical Informatics, 72, Pages 140–149, 2017. DOI: 10.1016/j.jbi.2017.07.009

CG
non-photorealistic rendering


R.K. dos Anjos, C.S. Ribeiro, D.S. Lopes, J.M. Pereira, Stroke-based splatting: an efficient multi-resolution pointcloud visualization technique, The Visual Computer, 33(9), Pages 1–15, 2017. DOI: 10.1007/s00371-017-1420-7

CG
collision detection


A.A. Gonçalves, A. Bernardino, J.A. Jorge, D.S. Lopes, A benchmark study on accuracy-controlled distance calculation between superellipsoid and superovoid contact geometries, Mechanism and Machine Theory, 115, Pages 77–96, 2017. DOI: 10.1016/j.mechmachtheory.2017.04.008

CG
molecular graphics


T. Simões, D.S. Lopes, S. Dias, F. Fernandes, J. Pereira, J. Jorge, C. Bajaj, A. Gomes, Geometric detection algorithms for cavities on protein surfaces in molecular graphics: a survey, Computer Graphics Forum, 36, Pages 643–683, 2017. DOI: 10.1111/cgf.13158

Medical UI/UX
immersive radiology


M. Sousa, D. Mendes, S. Paulo, N. Matela, J. Jorge, D.S. Lopes, VRRRRoom: Virtual Reality for radiologists in the reading room, Proceedings of the 35th Annual ACM Conference on Human Factors in Computing Systems (CHI 2017), New York: ACM Press, 2017. DOI: 10.1145/3025453.3025566

CAD
interactive geomodeling


D.S. Lopes, D. Mendes, M. Sousa, J. Jorge, Expeditious Illustration of Layer-Cake Models On and Above a Tactile Surface, Computers & Geosciences, 90, Part A, Pages 1–9, 2016. DOI: 10.1016/j.cageo.2016.02.009

CG
collision detection


D.S. Lopes, R.R. Neptune, J.A. Ambrósio, and M.T. Silva, A superellipsoid-plane model for simulating foot-ground contact during human gait, Computer Methods in Biomechanics and Biomedical Engineering, 19 (9): 954-963, 2016. DOI: 10.1080/10255842.2015.1081181

CAD
shape analysis


D.S. Lopes, R.R. Neptune, A.A. Gonçalves, J.A. Ambrósio, and M.T. Silva, Shape Analysis of the Femoral Head: A Comparative Study between Spherical, (Super)Ellipsoidal and (Super)Ovoidal Shapes, Journal of Biomechanical Engineering, 137(11): 114504(1-8), 2015. DOI: 10.1115/1.4031650

CAD
implicit surfaces


B.R. de Araújo, D.S. Lopes, P. Jepp, J.A. Jorge, and B. Wyvill, A Survey on Implicit Surface Polygonization, ACM Computing Surveys, 47(4): Article 60, 39 pages, 2015. DOI: 10.1145/2732197

CAD
geometric design


D.S. Lopes, M.T. Silva, and J.A. Ambrósio, Tangent vectors to a 3-D surface normal: A geometric tool to find orthogonal vectors based on the Householder transformation, Computer-Aided Design, 45(3): 683 - 694, 2013. DOI: 10.1016/j.cad.2012.11.003

CG
collision detection


D.S. Lopes, M.T. Silva, J.A. Ambrósio, and P. Flores, A mathematical framework for contact detection between quadric and superquadric surfaces, Multibody System Dynamics, 24(3): 255 - 280, 2010. DOI: 10.1007/s11044-010-9220-0

CAD
fem/anatomical modeling


J.P. Jorge, F.M.F. Simões, E.B. Pires, P.A. Rego, D.G. Tavares, D.S. Lopes, and A. Gaspar, Finite element simulations of a hip joint with femoroacetabular impingement, Computer Methods in Biomechanics and Biomedical Engineering, 17(11): 1275 - 1284, 2012. DOI: 10.1080/10255842.2012.744398

CAD
fem/anatomical modeling


M.P.M. Pato, N.G.S. Santos, E.B. Pires, P. Areias, M. de Carvalho, S. Pinto, and D.S. Lopes, Finite element studies of the mechanical behaviour of the diaphragm in normal and pathological cases, Computer Methods in Biomechanics and Biomedical Engineering, 14(6): 505-513, 2011. DOI: 10.1080/10255842.2010.483683

CAD
fem/anatomical modeling


L. B. Rodrigues, D.S. Lopes, J. Folgado, P.R. Fernandes, E.B. Pires, E.B. Las Casas, and R.R. Faleiros, Bone remodelling analysis of a bovine femur for a veterinary implant design, Computer Methods in Biomechanics and Biomedical Engineering, 12(6): 683 - 690, 2009. DOI: 10.1080/10255840902865641

CAD
fem/anatomical modeling


L.B. Rodrigues, E.B. Las Casas, D.S. Lopes, J. Folgado, P.R. Fernandes, E.B. Pires, G.E.S. Alves, and R.R. Faleiros, A finite element model to simulate femoral fractures in calves: testing different polymers for intramedullary interlocking nails, Veterinary Surgery, 41(7): 838 - 844, 2012. DOI: 10.1111/j.1532-950X.2012.01032.x


theses

PhD Thesis
Computational Engineering

D.S. Lopes, Smooth convex surfaces for modeling and simulating multibody systems with compliant contact elements, Ph.D. Thesis, Instituto Superior Técnico, Universidade de Lisboa, 2013.

MSc Thesis
Biomedical Engineering

D.S. Lopes, Geometric Modeling of Human Structures Based on CT Data-a Software Pipeline, Final Course Project Thesis, Instituto Superior Técnico, Universidade Técnica de Lisboa, 2006.

magazine articles

International Magazine
IT-MEDEX Project

D.S. Lopes, Medical interfaces of the future, Impact, Volume 2017, Number 10, November 2017, pp. 76-77(2). DOI: 0.21820/23987073.2017.10.76

International Magazine
immersive radiology

Paden Shorey, Audrey Girouard, Sang Ho Yoon, Yunbo Zhang, Ke Huo, Karthik Ramani, Mauricio Sousa, Daniel Mendes, Soraia Paulo, Nuno Matela, Joaquim Jorge, Daniel Simões Lopes, Dirk Wenig, Johannes Schöxning, Alex Olwal, Mathias Oben, and Rainer Malaka, Demo hour, interactions 24, 6 (October 2017), 8-11. DOI: 10.1145/3143318

National Magazine
IT-MEDEX Project

D.S. Lopes, Virtualmente Real: O Futuro do Radiodiagnóstico, Entrevista concedida à Revista Frontal sobre Realidade Virtual aplicada a cenários médicos, Revista Frontal, Associação de Estudantes da NOVA Medical School, edição 47, Ano 31, Dezembro 2017.