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2013
Marques, Filipe J., Carlos A. Coelho, and Paula Marques. "The Block-Matrix Sphericity Test: Exact and Near-Exact Distributions for the Test Statistic." Recent Developments in Modeling and Applications in Statistics. Springer Berlin Heidelberg, 2013. 169-177. Abstract
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Geng, Yong, Pedro Lúcio Almeida, Susete Nogueira Fernandes, Cheng Cheng, Peter Palffy-Muhoray, and Maria Helena Godinho. "A cellulose liquid crystal motor: a steam engine of the second kind." Scientific reports. 3 (2013): 1028. Abstract
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Canejo, João P., and Maria H. Godinho. "Cellulose perversions." Materials. 6.4 (2013): 1377-1390. Abstract
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Baptista, Ana, Isabel Ferreira, and JB Borges. "Cellulose-based bioelectronic devices." Cellulose-Medical, Pharmaceutical and Electronic Applications: InTech (2013). Abstract
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Baptista, Ana, Isabel Ferreira, and João Paulo Borges. "Cellulose-based composite systems for biomedical applications." Biomass based Biocomposites. UK: Smithers Rapra Technology (2013): 47-60. Abstract
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Crusat, Martin, Junfeng Liu, Angelina S. Palma, Robert A. Childs, Yan Liu, Stephen A. Wharton, Yi Pu Lin, Peter J. Coombs, Stephen R. Martin, Mikhail Matrosovich, Zi Chen, David J. Stevens, Vo Minh Hien, Tran Tan Thanh, Le Nguyen Truc Nhu, Lam Anh Nguyet, Do Quang Ha, Rogier H. van Doorn, Tran Tinh Hien, Harald S. Conradt, Makoto Kiso, Steve J. Gamblin, Wengang Chai, John J. Skehel, Alan J. Hay, Jeremy Farrar, Menno D. de Jong, and Ten Feizi. "Changes in the hemagglutinin of H5N1 viruses during human infection - Influence on receptor binding." Virology. 447 (2013): 326-337. Abstract
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Xavier, J., U. Belini, F. Pierron, J. Morais, J. Lousada, and M. Tomazello. "Characterisation of the bending stiffness components of MDF panels from full-field slope measurements." Wood Science and Technology. 47 (2013): 423-441. Abstract
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Seixas, J. D., A. Mukhopadhyay, T. Santos-Silva, L. E. Otterbein, D. J. Gallo, S. S. Rodrigues, B. H. Guerreiro, A. M. L. Gon?alves, N. Penacho, A. R. Marques, A. C. Coelho, P. M. Reis, MJ Romão, and C. C. Romão. "Characterization of a versatile organometallic pro-drug (CORM) for experimental CO based therapeutics." Dalton Transactions. 42 (2013): 5985-5998. Abstract
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Araújo, João, Michael Kinyon, and António Malheiro. "A characterization of adequate semigroups by forbidden subsemigroups." Proc. Roy. Soc. Edinburgh Sect. A. 143 (2013): 1115-1122. AbstractWebsite
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Vieira, E. M. F., S. Levichev, C. J. Dias, R. Igreja, M. Buljan, S. Bernstorff, O. Conde, A. Chahboun, A. G. Rolo, and M. J. M. Gomes. "Charge storage behavior of nanostructures based on SiGe nanocrystals embedded in Al2O3 matrix." European Physical Journal B. 86 (2013). AbstractWebsite
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Vieira, Eliana M. F., Sergey Levichev, Carlos J. Dias, Rui Igreja, Maja Buljan, Sigrid Bernstorff, Olinda Conde, Adil Chahboun, Anabela G. Rolo, and Maria J. M. Gomes. "Charge storage behavior of nanostructures based on SiGe nanocrystals embedded in Al2O3 matrix." European Physical Journal B. 86 (2013). Abstract
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Araújo, João, Peter J. Cameron, James D. Mitchell, and Max Neunhöffer. "The classification of normalizing groups." J. Algebra. 373 (2013): 481-490. AbstractWebsite
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Dias, G. F., M. F. S. F. de Moura, J. A. G. Chousal, and J. Xavier. "Cohesive laws of composite bonded joints under mode I loading." Composite Structures. 106 (2013): 646-652. Abstract
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Lajn, A.a, Von Wenckstern Grundmann Wagner Barquinha Fortunato Martins H. a M. a. "Comparative study of transparent rectifying contacts on semiconducting oxide single crystals and amorphous thin films." Journal of Applied Physics. 113 (2013). AbstractWebsite

We demonstrate fully transparent, highly rectifying contacts (TRC) on amorphous GaInZnO and compare them to TRC fabricated on single crystalline bulk ZnO and heteroepitaxial ZnO thin films. The contacts' transparency in the visible spectral range exceeds 70%. From numerical simulations, we conclude that thermionic emission is the dominating transport mechanism, however, for several samples with low net doping density diffusion theory must be applied. The detailed investigation of the rectification properties of the TRC using temperature-dependent current-voltage and capacitance-voltage measurements reveals that barrier inhomogeneities govern the IV-characteristics of all diodes irrespective of the sample crystallinity. Assuming a Gaussian barrier height distribution, the extracted mean barrier heights typically range between 1.1 and 1.3 V. The width of the barrier distribution correlates with the mean barrier height and ranges from 110 to 130 mV. By compiling literature data, we found that this correlation holds also true for Schottky diodes on elemental and III-V semiconductors. © 2013 American Institute of Physics.

Fernandes, A., J. Lousada, J. Morais, J. Xavier, J. Pereira, and P. Melo-Pinto. "Comparison between neural networks and partial least squares for intra-growth ring wood density measurement with hyperspectral imaging." Computers and Electronics in Agriculture. 94 (2013): 71-81. Abstract
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Cerdeira, {Jorge Orestes Lasbarrères}. "Computational comparison of algorithms for a generalization of the node-weighted Steiner tree and forest problems." Livro de Atas do XVI Congresso da Associa{\c c}ão Portuguesa de Investiga{\c c}ão Operacional (IO2013). 2013. 77-87. Abstract

Habitat fragmentation is a serious threat for the sustainability of species. Thus, the identification of effective linkages to connect valuable ecological units is an important issue in conservation biology. The design of effective linkages should take into account that areas which are adequately permeable for some species’ dispersal may act as obstructions for other species. The determination of minimum cost effective linkages is a generalization of both node-weighted Steiner tree and node-weighted Steiner forest problems. We compare the performance of different procedures for this problem using large real and simulated instances.

Teixeira, T., M. Diniz, R. Calado, and R. Rosa. "Coral physiological adaptations to air exposure: Heat shock and oxidative stress responses in Veretillum cynomorium." Journal of Experimental Marine Biology and Ecology. 439 (2013): 35-41. AbstractWebsite
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Vinagre, C., M. Dias, J. Roma, A. Silva, D. Madeira, and M. S. Diniz. "Critical thermal maxima of common rocky intertidal fish and shrimps - A preliminary assessment." Journal of Sea Research. 81 (2013): 10-12. AbstractWebsite
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Martins, R.M., Pereira Siqueira Salomão Freitas S. V. S. "Curcuminoid content and antioxidant activity in spray dried microparticles containing turmeric extract." Food Research International. 50 (2013): 657-663. AbstractWebsite

Curcuma longa L., also known as turmeric, is widely used as a food colorant and has been reported to have antioxidant, anti-inflammatory, anti-mutagenic and anti-cancer properties. The aim of this study was to evaluate the effects of the spray drying on curcuminoid and curcumin contents, antioxidant activity, process yield, the morphology and solubility of the microparticulated solid dispersion containing curcuma extract using a Box Behnken design. The microparticles were spherical in shape, and an increase in outlet temperature from 40 to 80 °C resulted in a significant increase in the yield of microparticles from 16 to 53%. The total curcuminoid content (17.15 to 19.57. mg/g), curcumin content (3.24 to 4.25. mg/g) and antioxidant activity (530.1 to 860.3 μg/mL) were also affected by the spray drying process. The solubility of curcuminoid from C. longa remarkably improved 100-fold in the microparticles, confirming the potential of the ternary solid dispersion technique to improve the dyeing and nutraceutical properties of these compounds. Furthermore, the microparticles were obtained using the spray drying process, can be easily scaled up. © 2011 Elsevier Ltd.

Nandy, S., Gonçalves Pinto Busani Figueiredo Pereira Paiva Martins Fortunato G. J. V. "Current transport mechanism at metal-semiconductor nanoscale interfaces based on ultrahigh density arrays of p-type NiO nano-pillars." Nanoscale. 5 (2013): 11699-11709. AbstractWebsite

The present work focuses on a qualitative analysis of localised I-V characteristics based on the nanostructure morphology of highly dense arrays of p-type NiO nano-pillars (NiO-NPs). Vertically aligned NiO-NPs have been grown on different substrates by using a glancing angle deposition (GLAD) technique. The preferred orientation of as grown NiO-NPs was controlled by the deposition pressure. The NiO-NPs displayed a polar surface with a microscopic dipole moment along the (111) plane (Tasker's type III). Consequently, the crystal plane dependent surface electron accumulation layer and the lattice disorder at the grain boundary interface showed a non-uniform current distribution throughout the sample surface, demonstrated by a conducting AFM technique (c-AFM). The variation in I-V for different points in a single current distribution grain (CD-grain) has been attributed to the variation of Schottky barrier height (SBH) at the metal-semiconductor (M-S) interface. Furthermore, we observed that the strain produced during the NiO-NPs growth can modulate the SBH. Inbound strain acts as an external field to influence the local electric field at the M-S interface causing a variation in SBH with the NPs orientation. This paper shows that vertical arrays of NiO-NPs are potential candidates for nanoscale devices because they have a great impact on the local current transport mechanism due to its nanostructure morphology. © 2013 The Royal Society of Chemistry.

Aelenei, L., D. Aelenei, H. Gon, R. Lollini, E. Musall, A. Scognamiglio, E. Cubi, and M. Noguchi. "Design issues for net zero-energy buildings." Open House International. 38 (2013): 7-14. AbstractWebsite

Net Zero-Energy Buildings (NZEBs) have received increased attention in recent years as a result of constant concerns about energy supply constraints, decreasing energy resources, increasing energy costs and the rising impact of greenhouse gases on world climate. Promoting whole building strategies that employ passive measures together with energy efficient systems and technologies using renewable energy became a European political strategy following the publication of the Energy Performance of Buildings Directive recast in May 2010 by the European Parliament and Council. However designing successful NZEBs represents a challenge because the definitions are somewhat generic while assessment methods and monitoring approaches remain under development and the literature is relatively scarce about the best sets of solutions for different typologies and climates likely to deliver an actual and reliable performance in terms of energy balance (consumed vs generated) on a cost-effective basis. Additionally the lessons learned from existing NZEB examples are relatively scarce. The authors of this paper, who are participants in the IEA SHC Task 40-ECBCS Annex 52, "Towards Net Zero Energy Solar Buildings", are willing to share insights from on-going research work on some best practice leading NZEB residential buildings. Although there is no standard approach for designing a Net Zero-Energy Building (there are many different possible combinations of passive and efficient active measures, utility equipment and on-site energy generation technologies able to achieve the net-zero energy performance), a close examination of the chosen strategies and the relative performance indicators of the selected case studies reveal that it is possible to achieve zero-energy performance using well known strategies adjusted so as to balance climate drivendemand for space heating/cooling, lighting, ventilation and other energy uses with climate-driven supply from renewable energy resources.

Aelenei, Daniel, Laura Aelenei, Eike Musall, Eduard Cubi, Josef Ayoub, and Ana Belleri. "Design strategies for non-residential zero - energy buildings - Lessons learned from Task 40/Annex 52 ?Towards Net Zero - Energy Solar Buildings?,." CLIMA 2013. 978-80-260-4001-9. 2013. Abstract
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Merino, E. G., P. D. Neves, I. M. Fonseca, F. Danéde, A. Idrissi, C. J. Dias, M. Dionísio, and N. T. Correia. "Detection of two glass transitions on triton X-100 under confinement." Journal of Physical Chemistry C. 117 (2013): 21516-21528. AbstractWebsite
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