Computational Design
shape analysis

D.S. Lopes, S.M. Pires, C.D. Barata, V.V. Mascarenhas, J.A. Jorge, The Hip Joint as an Egg Shape: A Comprehensive Study of Femoral and Acetabular Morphologies, Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, ...(...), Pages ...– -..., 2020. DOI:

E.R. Zorzal, M. Sousa, D. Mendes, R.F. dos Anjos, D. Medeiros, S.F. Paulo, P. Rodrigues, J.J. Mendes, V. Delmas, J.-F. Uhl, J. Mogorrón, J.A. Jorge, D.S. Lopes, Anatomy Studio: a Tool for Virtual Dissection Through Augmented 3D Reconstruction, Computers & Graphics, 85, Pages 74–84, 2019. DOI: 10.1016/j.cag.2019.09.006

Medical UI/UX
touchless interface

S.F. Paulo, F. Relvas, H. Nicolau, Y. Rekik, V. Machado, J. Botelho, J.J. Mendes, L. Grisoni, J.A. Jorge, D.S. Lopes, Touchless interaction with medical images based on 3D hand cursors supported by single-foot input: A case study in dentistry, Journal of Biomedical Informatics, Volume 100, 103316, 2019. DOI: 10.1016/j.jbi.2019.103316

Gestural Input
touchless interface

D.S. Lopes, F. Relvas, S. Paulo, Y. Rekik, L. Grisoni, J.A. Jorge. 2019. FEETICHE: FEET Input for ContactlessHand gEsture Interaction. In The 17th International Conference on VirtualReality Continuum and its Applications in Industry (VRCAI '19), November 14–16, 2019, Brisbane, QLD, Australia. ACM, New York, NY, USA, 10 pages. DOI: 10.1145/3359997.3365704

Computational Design
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

Computational Design
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, 59, Pages 50–55, 2018. DOI: 10.1016/j.medengphy.2018.07.001

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, Volume 2018, Article ID 4567213, 13 pages, 2018. DOI: 10.1155/2018/4567213

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. Lecture Notes in Computer Science, 11071, Pages 629–637, Springer, Cham, 2018. DOI: 10.1007/978-3-030-00934-2_70

HCI
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, 118, Pages 1–13, 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, 34, Pages 1713–1723, 2018. 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

Computational Design
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

Computational Design
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

Computational Design
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

Computational Design
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

Computational Design
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

Computational Design
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

Computational Design
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

Computational Design
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