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Journal articles on the topic 'Porou'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

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1

Robertson, Natalie. "Swirling currents emerge at the Waiapu river mouth: Lens-based witnessing, documenting and storytelling of slow catastrophes." Journal of Environmental Media 2, no. 1 (2021): 6.1–6.16. http://dx.doi.org/10.1386/jem_00054_1.

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This article considers how Indigenous stories and chants can tell us about our ecologies in the time of environmental emergencies. For Ngāti Porou of the lower reaches of the Waiapu river catchment in Te Ika-a-Māui, the North Island of Aotearoa (New Zealand), the slow catastrophes of twentieth-century colonial deforestation impacts, introduced pest-induced inland forest collapse and predicted twenty-first-century climate change sea level rise have converged as our most pressing environmental problems. Waiapu is home to Ngāti Porou Tūturu, coastal fishing people who value their relationships wi

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Brewin, Marilyn, and Carolyn Coggan. "Evaluation of the Ngati Porou community injury prevention project." Ethnicity & Health 9, no. 1 (2004): 5–15. http://dx.doi.org/10.1080/1355785042000202754.

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3

Rasulov, A., and U. Dalabaev. "Flow in a channel with porous insert." IOP Conference Series: Earth and Environmental Science 990, no. 1 (2022): 012027. http://dx.doi.org/10.1088/1755-1315/990/1/012027.

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Abstract Filtration of an incompressible liquid (gas) in a non-deformable porou s medium is investigated. The results of numerical simulation of the hydrodynamic features of the flow arising after the passage of the liquid through a layer of an immobile porous medium are presented. An interpenetrating model of multiphase media is used to describe such flows. The porosity and permeability of the porous medium, as well as the force of interfacial interaction, are considered in the framework of compliance with the Kozeny-Karman ratio. The influence of the geometrical shape of the bulk layer on th

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van Halderen, Lisa. "Reflections and lessons of a non-Māori student working in a Kaupapa Māori research space." MAI Journal. A New Zealand Journal of Indigenous Scholarship 12, no. 1 (2023): 93–109. http://dx.doi.org/10.20507/maijournal.2023.12.1.9.

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I am part of the research group Te Koronga, a Māori Postgraduate Research Excellence rōpū at the University of Otago. Te Koronga conducts research with a vision of mauri ora and is underpinned by a Kaupapa Māori philosophy. For the past six years, under the supervision of Associate Professor Anne-Marie Jackson and Professor Chris Hepburn, I have worked alongside Kāti Huirapa ki Puketeraki of Kāi Tahu and Te Aitanga a Mate of Ngāti Porou primarily in the context of customary fisheries management. For me, as a non-Māori student and researcher, Te Koronga has been a safe space to engage in te ao

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Defngin, Axel. "A Whakapapa of Tradition: 100 Years of Ngāti Porou Carving, 1830–1930 by Ngarino Ellis." Contemporary Pacific 34, no. 1 (2022): 236–38. http://dx.doi.org/10.1353/cp.2022.0018.

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6

Robertson, Natalie. "Roimata Toroa." Pacific Journalism Monographs : Te Koakoa: Ngā Rangahau, no. 7 (November 30, 2017): 8–9. http://dx.doi.org/10.24135/pjm.v0i7.16.

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I n Te Ao Mãori, the Toroa (albatross) is sacred. Roimata Toroa, albatross tears, is a widely used tukutuku pattern. Derived from the Te Tairawhiti Ngati Porou story of Pourangahua, the pattern speaks of themisadventures of travelers who take shortcuts in haste to get to port. Pourangahua was an agriculturist who traveling a return journey to Aotearoa to grow kumara, gifted to him by Ruakapenga, a tohunga and learned scientist. Lent two pet albatrosses, Harongarangi and Tiungarangi, by Ruakapenga, Pourangahua is given strict instructions on which hazards to avoid, the care of the birds, and a

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Corlett, Rebekah. "Reimagining education with Rebekah Corlett: A whānau perspective on partnership and inclusion." Kairaranga 24, no. 1 (2023): 86–90. http://dx.doi.org/10.54322/kairaranga.v24i1.369.

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Kia ora koutouKo Hikurangi te maungaKo Waiapu te awaKo Ngāti Porou te iwiKo Rongohaere te maraeKo Rebekah Corlett toku ingoa I’m a mum to Sophia who is fourteen. She was diagnosed as autistic at age 2 1/2; she is non- speaking and uses Augmentative and Alternative Communication (AAC) to communicate which for her is an iPad with a communication app on it. She uses a mixture of a few spoken words, AAC, a few NZSL signs and lots of gestures. That’s how she makes herself known. We live on the Kapiti Coast which is about an hour north of Wellington. I live with my husband Jason and also our son Ry

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8

Puke, Wiremu T. "Conception, construction and the cultural significance of Te Parapara Garden in Hamilton, Aotearoa New Zealand." Journal of New Zealand & Pacific Studies 9, no. 2 (2021): 179–98. http://dx.doi.org/10.1386/nzps_00071_1.

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Te Parapara Garden is the only complete pre-European-style Māori horticultural garden in the world. Historically inspired and empirically researched, it lies within the Hamilton Gardens on a young river terrace immediately adjacent to the Waikato River in Hamilton (Kirikiriroa), Aotearoa New Zealand. In this article, Wiremu Puke (Ngāti Wairere, Ngāti Porou) ‐ a tohunga whakairo (master carver, including using pre-steel tools) and a tohunga whakapapa (genealogical expert on his tribal affiliations) of Ngāti Wairere (the mana whenua, or first people of the traditional ancestral tribal lands of K

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9

Moyle, Paora. "<b>Only those who love us should decide</b> <b>our care: </b>Elevating survivor voices of Takatāpui, Rainbow, and MVPFAFF+ communities." Aotearoa New Zealand Social Work 37, no. 2 (2025): 60–73. https://doi.org/10.11157/anzswj-vol37iss2id1249.

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INTRODUCTION: This article examines systemic harm inflicted on Takatāpui, Rainbow, and MVPFAFF+ communities in Aotearoa through state and faith-based institutions. Drawing on survivor testimony from the Royal Commission of Inquiry into Abuse in Care, it situates these experiences within histories of cultural genocide, where colonial systems deliberately targeted those at the intersection of cultural identity and gender and sexual diversity. METHODS: Using the Pū Rā Ka Ū framework, this qualitative study foregrounds verbatim accounts to honour survivors’ voices. FINDINGS: Findings reveal how in

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Kojola, Ilpo, Timo Helle, and Pekka Aikio. "Productivity of semi-domesticated reindeer in Finland." Rangifer 11, no. 2 (1991): 53. http://dx.doi.org/10.7557/2.11.2.978.

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<p>In spite of a twofold increase in the density of reindeer in Finland from 1974 to 1987, meat production per reindeer increased during this period. This was possible due to calf harvesting and supplemental feeding. Results from multiple regression models indicated that calf harvesting influenced both per unit area and per capita production more than supplemental feeding. Correlation between meat production and animal density decreased with increased supplemental feeding. Traditionally, southern and central herds of reindeer fed mainly on arboreal lichens in late winter; however, due to

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Tsai, Yu-Chih, Jechan Lee, Eilhann Kwon, et al. "Enhanced Catalytic Soot Oxidation by Ce-Based MOF-Derived Ceria Nano-Bar with Promoted Oxygen Vacancy." Catalysts 11, no. 9 (2021): 1128. http://dx.doi.org/10.3390/catal11091128.

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As CeO2 is a useful catalyst for soot elimination, it is important to develop CeO2 with higher contact areas, and reactivities for efficient soot oxidation and catalytic soot oxidation are basically controlled by structures and surface properties of catalysts. Herein, a Ce-Metal organic framework (MOFs) consisting of Ce and benzene-1,3,5-tricarboxylic acid (H3BTC) is employed as the precursor as CeBTC exhibits a unique bar-like high-aspect-ratio morphology, which is then transformed into CeO2 with a nanoscale bar-like configuration. More importantly, this CeO2 nanobar (CeONB) possesses porou,

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Taare-Smith, Dorothy. "Reimagining education with Dorothy Taare-Smith:Takiwātanga and community-based support." Kairaranga 24, no. 2 (2023): 119–24. http://dx.doi.org/10.54322/yaj16t60.

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Haere mai, Dorothy. Tell us a bit about yourself and what brought you to this Takiwātanga mahi? Ko Hikurangi te maungaKo Waiapu te awaKo Horouta te wakaKo Ngãti Porou te iwiKo Dorothy Taare-Smith tōku ingoaNo Tūranganui a kiwa ahau e noho ana I’m married to Tuhi and we have a blended family of three grown daughters and eight mokopuna. My number five mokopuna is our taonga takiwātanga. My journey began way before my mokopuna wasborn; the takiwātanga journey began for me when I was teaching. The skills and knowledge I acquired came from the tertiary institutes I had studied at, and the PLD

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Babu, Lenin, and Chandramouli Padmanabhan. "Hybrid Active and Passive Noise Control of Cavities." Acta Acustica united with Acustica 97, no. 5 (2011): 752–60. http://dx.doi.org/10.3813/aaa.918455.

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In this paper a hybrid active noise control of a cavity with poro-elastic material has been investigated. It has been found that the noise reduction achieved with active noise control in the cavity without poro-elastic material is not significantly altered with the presence of poro-elastic materials. This is shown to be independent of the porous material and its thickness and is true both at lower and mid-frequency ranges. Further, it is seen that macro perforations do not alter the sound absorption performance of the poro-elastic material in the presence of active noise control. The results c

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14

Pösö, A. Reeta. "Seasonal changes in reindeer physiology." Rangifer 25, no. 1 (2005): 31–38. http://dx.doi.org/10.7557/2.25.1.335.

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The seasonal changes in the photoperiod, temperature and availability of food need to be converted to hormonal signals in order to induce adaptations in the physiology of the reindeer. The most reliable of the seasonal changes in the environment is the photoperiod, which affects the reindeer physiology through pineal gland and its hormone, melatonin. Usually there are large diurnal changes in the concentration of melatonin, but in the reindeer the daily rhythm disappears during the arctic summer to return again in the autumn. Seasonal changes in melatonin secretion are involved in the regulati

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15

Costa, Eliane Betânia Carvalho, Fernando Akira Kurokawa, and Vanderley Moacyr John. "Modelagem simplificada para estimativa do potencial de penetração de partículas em substratos porosos." Ambiente Construído 13, no. 1 (2013): 25–34. http://dx.doi.org/10.1590/s1678-86212013000100003.

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Um modelo simplificado foi desenvolvido para estimar o potencial de penetração de partículas típicas de matrizes de argamassas e concretos nos poros de um substrato. O modelo considera que, após serem lançadas sobre a superfície, as partículas com área de projeção no plano menor ou igual à área do poro podem penetrá-la. Foram estudadas cinco matrizes distintas, constituídas por partículas de cimento, cal, filer calcário, microssílica e argamassa aplicadas em três substratos com distribuição do tamanho de poros similares aos encontrados no mercado nacional. A distribuição granulométrica das par

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Selvadurai, A. P. S., and A. P. Suvorov. "Boundary heating of poro-elastic and poro-elasto-plastic spheres." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 468, no. 2145 (2012): 2779–806. http://dx.doi.org/10.1098/rspa.2012.0035.

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This paper examines the coupled hydro-thermo-mechanical behaviour of a fluid-saturated porous sphere with a skeletal fabric that can exhibit either elastic or elasto-plastic mechanical behaviour. Analytical results for the thermo-poro-elastic response of the sphere subjected to transient heat transfer are complemented by computational results for the analogous thermo-poro-elasto-plastic problem. The results presented in the paper examine the influence of the permeability, thermal expansion properties of the pore fluid and the skeleton, and the elasto-plasticity effects of the porous skeleton o

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17

Ha, Jonghyun, and Ho-Young Kim. "Capillarity in Soft Porous Solids." Annual Review of Fluid Mechanics 52, no. 1 (2020): 263–84. http://dx.doi.org/10.1146/annurev-fluid-010518-040419.

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Soft porous solids can change their shapes by absorbing liquids via capillarity. Such poro-elasto-capillary interactions can be seen in the wrinkling of paper, swelling of cellulose sponges, and morphing of resurrection plants. Here, we introduce physical principles relevant to the phenomena and survey recent advances in the understanding of swelling and shrinkage of bulk soft porous media due to wetting and drying. We then consider various morphing modes of porous sheets, which are induced by localized wetting and swelling of soft porous materials. We focus on physical insights with the aim o

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18

Hoerlle, Fernanda Oliveira, Edmilson Helton Rios, William Godoy de Azevedo Lopes da Silva, et al. "NUCLEAR MAGNETIC RESONANCE TO CHARACTERIZE THE PORE SYSTEM OF COQUINAS FROM MORRO DO CHAVES FORMATION, SERGIPE-ALAGOAS BASIN, BRAZIL." Revista Brasileira de Geofísica 36, no. 3 (2018): 1. http://dx.doi.org/10.22564/rbgf.v36i3.1960.

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ABSTRACT. Nuclear magnetic resonance (NMR) is a recognized petrophysical tool in the oil and gas industry to characterize reservoir rocks and fluids. In this study, the pore system of coquinas from a single bed of a quarry in the Morro do Chaves Formation was evaluated. These sedimentary rocks have been considered as a potential analogous to some Brazilian pre-salt reservoir rocks. The objective of this work was to characterize the porous system of coquinas in terms of total porosity and pore size distribution using low-field NMR. Conversion of T2 relaxation times to pore size radii was perfor

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Suarez Andrade, Heber I., María E. Hernández Rojas, Manuel E. Palomar Pardavé, and Sandro Báez Pimiento. "MANUFACTURING OF ALUMINUM FOAMS USING THE SINTERING DISSOLUTION PROCESS." Revista Colombiana de Materiales, no. 5 (May 16, 2014): 292–98. http://dx.doi.org/10.17533/udea.rcm.19235.

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Este trabajo reporta la fabricación de espumas de aluminio con tamaños de poro en el rango de 1 a 2 mm y densidades mínimas del orden de 0.56 g/cm3. Las espumas fueron fabricadas usando el proceso de sinterización–disolución, con carbamida como material generador de poros y empleando un dispositivo con atmósfera controlada en la etapa de sinterización para evitar la oxidación del metal. Las espumas obtenidas mostraron una estructura porosa con una distribución de poros y tamaño de poro regular. Las gráficas de esfuerzo vs deformación indicaron valores de esfuerzo máximo max entre 61.39 MPa y 0

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20

Satcunanathan, Sutharsan, Matthias Meinke, and Wolfgang Schröder. "Impact of Porous Media on Boundary Layer Turbulence." Fluids 7, no. 4 (2022): 139. http://dx.doi.org/10.3390/fluids7040139.

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The subsonic flows around NACA 0012 aerofoils with a solid, a porous, and a poro-serrated trailing edge (TE) at a Reynolds number of 1 × 106 are investigated by a hybrid Reynolds-averaged Navier–Stokes (RANS)/large-eddy simulation (LES) approach. The porosity is treated by the method-of-volume averaging. In the RANS, a two-equation low Reynolds number k-ε turbulence model is modified to include the porous treatment. Similarly the equations in the LES are extended by the Darcy–Forchheimer model. The simulation is set up with the broadband turbulent boundary layer trailing edge (TBL-TE) noise pr

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Johnson, Lyrck. "Are Designers Diluting Culture? Connecting Theory to Practice." Asylum 2 (December 31, 2023): 330–36. http://dx.doi.org/10.34074/aslm.2023207.

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The cohabitation between Indigenous and non- Indigenous peoples in this post-colonial society is a hefty but necessary topic that must be discussed. This is particularly important for landscape architects, as we are responsible for designing our urban public spaces and cities. Māori, the Indigenous people of Aotearoa, have struggled with land theft, and the erasure of their history and identity since the first European settlers arrived. Aotearoa has come a long way regarding cultural acceptance, acknowledgment and collaboration when it comes to design. This is evident, as engaging with mana wh

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Chavez Panduro, Elvia Anabela, Thomas Beuvier, Manuel Fernández Martínez, et al. "Small-angle X-ray scattering analysis of porous powders of CaCO3." Journal of Applied Crystallography 45, no. 5 (2012): 881–89. http://dx.doi.org/10.1107/s0021889812032219.

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The results of small-angle and ultra-small-angle X-ray scattering on porous CaCO3microparticles of pulverulent vaterite made by a conventional chemical route and by using supercritical CO2are presented. The scattering curves are analysed in the framework of the Guinier–Porod model, which gives the radii of gyration of the scattering objects and their fractal dimension. In addition, the porosity and the specific surface area are determined by using the Porod invariant, which is modified to take into account the effective thickness of the pellet. The results of this analysis are compared with th

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Selvadurai, A. P. S., and A. P. Suvorov. "On the development of instabilities in an annulus and a shell composed of a poro-hyperelastic material." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 474, no. 2218 (2018): 20180239. http://dx.doi.org/10.1098/rspa.2018.0239.

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The paper investigates the development of instability in an internally pressurized annulus of a poro-hyperelastic material. The theory of poro-hyperelasticity is proposed as an approach for modelling the mechanical behaviour of highly deformable elastic materials, the pore space of which is saturated with a fluid. The consideration of coupling between the mechanical response of the hyperelastic porous skeleton and the pore fluid is important when applying the developments to soft tissues encountered in biomechanical applications. The paper examines the development of an instability in a poro-h

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Rossetto, José João, Paulo José Abatti, Liangzhong Hu, and Guilherme Rossetto. "Análise da distância entre dois poros cilíndricos curtos paralelos e coaxiais na construção de filtros mecânicos artificiais para a seletividade de glóbulos vermelhos." OBSERVATÓRIO DE LA ECONOMÍA LATINOAMERICANA 22, no. 9 (2024): e6598. http://dx.doi.org/10.55905/oelv22n9-053.

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Apresenta-se uma análise da estimativa da distância entre dois poros cilíndricos curtos paralelos e coaxiais no modelo da passagem concomitante do glóbulo vermelho pelos poros. Modelos geométricos são elaborados para se determinar as estimativas da distância entre os poros que permita uma travessia simultânea através dos mesmos, deduzindo-se expressões e estimativas numéricas para essa distância. Valores de medidas para a distância entre os poros são analisados, para se determinar a validade dos modelos da passagem conjunta. Gráficos são apresentados ilustrando as faixas de passagem dos glóbul

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Nieminen, Mauri. "Ennen poro ruokki poromiehen, nyt poromies ruokkii poron." Suomen Maataloustieteellisen Seuran Tiedote, no. 33 (January 31, 2016): 1–7. http://dx.doi.org/10.33354/smst.75214.

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Suomessa poronomistajia on enää 4 000 ja alle 900 pitää porotaloutta elinkeinonaan. Ylä-Lapin kankailla jäkälämäärä pieneni 30 vuodessa 75 %, ja sitä on enää 120 kg kuivapainoa/ha. Poronhoitoalueen keski ja eteläosassa jäkälää on vain 35 kg/ha. Määrät ovat 10-100 kertaa pienemmät kuin metsäpeuroilla Kuhmossa sekä tunturipeuroilla ja poroilla Etelä-Norjassa ja Kuolassa. Vaikka tunturialueesta on suojeltu yli 80 %, myös tunturikoivikot ovat ylilaidunnettuja ja uhanalaisia. Poroja ruokitaan talvisin kaikissa paliskunnissa ja yli 45 miljoonalla rehukilolla. Rehuista yli puolet on kaupallisia, ja s

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Hung, Tu-Chieh, Yu-Xian Huang, and Wei-Mon Yan. "Design of Porous-Microchannel Heat Sinks with Different Porous Configurations." International Journal of Materials, Mechanics and Manufacturing 4, no. 2 (2015): 89–94. http://dx.doi.org/10.7763/ijmmm.2016.v4.231.

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Puente Ramirez, Norma Patricia, L. M. Torres-Treviño та J. E. Sánchez-Cantú. "Modelado computacional usando regresión lineal y simbólica α β para determinar ópticamente el tamaño del poro de la piel". Nova Scientia 7, № 14 (2015): 218. http://dx.doi.org/10.21640/ns.v7i14.136.

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La apariencia de los poros de la piel normalmente es causada por glándulas sebáceas hiperactivas, sin embargo, en los últimos años se ha reportado que además se ve afectada por diversas enfermedades, entre ellas la diabetes (Jerrold, S Petrofsky, 2008), obesidad (Derraik, Jose GB, 2014) o el cáncer. Generalmente los principales factores que contribuyen a la dilatación de los poros son la edad, el género masculino, el acné, la exposición crónica al sol y la predispocisión genética. El desarrollo de un método no invasivo que permita conocer las condiciones de la piel, ayudara a relacionar los fa

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Kelder, Oscar, and David M. J. Smeulders. "Observation of the Biot slow wave in water‐saturated Nivelsteiner sandstone." GEOPHYSICS 62, no. 6 (1997): 1794–96. http://dx.doi.org/10.1190/1.1444279.

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Acoustic signals are used extensively in the oil industry to determine the physical properties of reservoir rock. In the interpretation of these signals empirical laws play a major role. To obtain a more fundamental interpretation of the recorded wavetrains, the need for a comprehensive theory for acoustic wave propagation and damping in rocks is obvious. In this respect, Biot's (1956a,b) theory is a straightforward and effective two‐phase theory. In contrast to Biot, who derived the macroscopic equations for wave propagation in saturated poro‐elastic material by postulating definite positive‐

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SHI, Tongyang, Zhuang MO, Guochenhao SONG, and J. Stuart BOLTON. "Acoustics response of granular porous material: experiment and modeling." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, no. 10 (2024): 1958–66. http://dx.doi.org/10.3397/in_2024_3108.

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Granular porous materials such as activated carbon have drawn increasing attention due to their good sound absorption performance at low frequency. However, some unique acoustical behaviors have been observed during sound absorption measurements of granular porous materials in impedance tubes: e.g., circumferential edge-constraint effects, level-dependent absorption behavior, and time-dependent absorption behavior. In order to explain these observations, a 1-dimensional poro-elastic model was first applied to describe the sound propagation in granules stacked in a cylindrical sample holder, as

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Tran, Bao Viet, and Xavier Chateau. "Micromechanical model to predict the effect of temperature on the behavior of unsaturated porous media." Vietnam Journal of Mechanics 45, no. 3 (2023): 235–46. http://dx.doi.org/10.15625/0866-7136/19023.

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The homogenization method is used to investigate temperature effects on the water content-capillary pressure relationship and on the poro-mechanical behavior of unsaturated porous media. Two different phenomena have been considered: the temperature variations of surface tensions and the thermal dilatation of the solid phase in the framework of micromechanical models that are proposed in order to highlight the influence of the deformability of the solid phase on the macroscopic behavior. The result show that taking into account the coupling between the deformation of the porous space and the ca

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LAPIN, I. V., I. M. GILMUTDINOV, and R. N. ASKAROVA. "OBTAINING POROUS COPPER BY DECOMPOSITION OF PORO-FORMING PARTICLES." IZVESTIA VOLGOGRAD STATE TECHNICAL UNIVERSITY, no. 2(285) (February 2024): 47–51. http://dx.doi.org/10.35211/1990-5297-2024-2-285-47-51.

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The article discusses the main functional properties of copper foam material obtained by molding and sintering copper with a blowing agent in the form of CaCO3. The raw materials for pore formation were selected and TGA analysis was carried out to determine the maximum decomposition of the presented porophore. The main characteristics (particle dispersion, amount of component, amount of pore-forming phase during decomposition, etc.) of the used powder blowing agent in the form of CaCO3 were selected experimentally. The physical and mechanical properties of the obtained copper foam samples were

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Costa Baptista, Josué, Roland Fotsing, Jacky Mardjono, Daniel Therriault, and Annie Ross. "Acoustic modelling of 3D-printed hybrid materials: a preliminary study." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 266, no. 2 (2023): 122–33. http://dx.doi.org/10.3397/nc_2023_0018.

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Analytical and finite element (FE) models are developed to predict the sound absorption coefficient of hybrid materials obtained through assembly of folded quarter-length resonators and periodic porous material. The analytical model uses the sum of the acoustic admittances. The acoustic admittance of resonators is simulated with Stinson's model. Johnson-Champoux-Allard-Lafarge (JCAL) model and transfer matrix method (TMM) are used to calculate the acoustic admittance of 1, 2 and 4-layers of porous materials with different geometric parameters. The FE model is implemented using the COMSOL Multi

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Sen, Pabitra N., Martin D. Hürlimann, and Thomas M. de Swiet. "Debye-Porod law of diffraction for diffusion in porous media." Physical Review B 51, no. 1 (1995): 601–4. http://dx.doi.org/10.1103/physrevb.51.601.

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Di Rado, Ariel, Javier L. Mroginski, Pablo Beneyto, and Juan C. Barreto. "Un Enfoque Micromecánico Simple para la Solución de Fuerzas Configuracionales y Tensor de Tensiones de Maxwell en Medios Porosos No Saturados." Mecánica Computacional 41, no. 12 (2025): 611–20. https://doi.org/10.70567/mc.v41i12.61.

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El objetivo principal de este estudio es evaluar las fuerzas configuracionales y la energía libre asociada dentro de un continuo poroelástico que contiene vacíos llenos de fluido, utilizando un enfoque de micromecánica para las ecuaciones constitutivas dentro del marco de la mecánica eshelbiana. Las ecuaciones de conservación de Biot, aplicadas en un esquema diluido para el entorno micromecánico, junto con la teoría de homogeneización de Mori-Tanaka, se emplean para resolver el material geológico. En el modelo matemático, los poros se tratan como inhomogeneidades de Eshelby dentro de una matri

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Girault, Vivette, Mary F. Wheeler, Tameem Almani, and Saumik Dana. "A priori error estimates for a discretized poro-elastic–elastic system solved by a fixed-stress algorithm." Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles 74 (2019): 24. http://dx.doi.org/10.2516/ogst/2018071.

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We consider a poro-elastic region embedded into an elastic non-porous region. The elastic displacement equations are discretized by a continuous Galerkin scheme, while the flow equations for the pressure in the poro-elastic medium are discretized by either a continuous Galerkin scheme or a mixed scheme. Since the overall system of equations is very large, a fixed-stress algorithm is used at each time step to decouple the displacement from the flow equations in the poro-elastic region. We prove a priori error estimates for the resulting Galerkin scheme as well as the mixed scheme, with the expe

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Hewitt, Duncan R., Jerome A. Neufeld, and Neil J. Balmforth. "Shallow, gravity-driven flow in a poro-elastic layer." Journal of Fluid Mechanics 778 (August 5, 2015): 335–60. http://dx.doi.org/10.1017/jfm.2015.361.

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By combining Biot’s theory of poro-elasticity with standard shallow-layer scalings, a theoretical model is developed to describe axisymmetric gravity-driven flow through a shallow deformable porous medium. Motivated in part by observations of surface uplift around $\text{CO}_{2}$ sequestration sites, the model is used to explore the injection of a dense fluid into a horizontal, deformable porous layer that is initially saturated with another, less dense, fluid. The layer lies between a rigid base and a flexible overburden, both of which are impermeable. As the injected fluid spreads under grav

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PUSKARZ, ROMAN, ANDRZEJ SZYMCZYK, SŁAWOMIR SUCHOCKI, and JOLANTA KONOPKA. "Comparison of vaginal delivery in water and by the traditional method." PRZEGLĄD GINEKOLOGICZNO-POŁOŻNICZY 6, no. 2 (2006): 121–24. http://dx.doi.org/10.1066/s10014060003.

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Greulich-Weber, Siegmund, and B. Friedel. "Bottom-Up Routes to Porous Silicon Carbide." Materials Science Forum 615-617 (March 2009): 637–40. http://dx.doi.org/10.4028/www.scientific.net/msf.615-617.637.

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We report on constructive methods providing a large range of high purity porous SiC products. All methods are based on modified sol-gel processes combined with carbothermal re¬duction. We obtain monodisperse regular pores of well defined diameters by using carbon sphere templates which are removed after SiC infiltration. A different way is a sol-gel based conversion of graphite bodies into SiC, which transfers the porosity from the graphite matrix into the final SiC product. Thus a large variety of porosity features are available, originating either from natural poro¬sity of graphite or from p

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Chen, Yijun, Mostafa E. Mobasher, Tao You, and Haim Waisman. "Non-local continuum damage model for poro-viscoelastic porous media." International Journal of Rock Mechanics and Mining Sciences 159 (November 2022): 105212. http://dx.doi.org/10.1016/j.ijrmms.2022.105212.

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Ciccariello, Salvino, Yuri B. Melnichenko, and Lilin He. "Supercritical carbon dioxide behavior in porous silica aerogel." Journal of Applied Crystallography 44, no. 1 (2010): 43–51. http://dx.doi.org/10.1107/s0021889810045176.

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Analysis of the tails of the small-angle neutron scattering (SANS) intensities relevant to samples formed by porous silica and carbon dioxide at pressures ranging from 0 to 20 MPa and at temperatures of 308 and 353 K confirms that the CO2fluid must be treated as a two-phase system. The first of these phases is formed by the fluid closer to the silica wall than a suitable distance δ and the second by the fluid external to this shell. The sample scattering-length densities and shell thicknesses are determined by the Porod invariants and the oscillations observed in the Porod plots of the SANS in

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Barry, Steven, Geoffrey Aldis, and Geoffry Mercer. "Injection of Fluid Into a Layer of Deformable Porous Medium." Applied Mechanics Reviews 48, no. 10 (1995): 722–26. http://dx.doi.org/10.1115/1.3005054.

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The flow of fluid from a point source into a layer of deformable porous material is considered. The main applications of this work are to subcutaneous injections and subterranean soil flows. The porous material is assumed to be an isotropic, homogeneous, linearly elastic solid. The governing equations are derived for an axisymmetric geometry using linear poro-elasticity and are applied to the situation of a point source at some height z = z0 with a line sink at a distance r = ρ. These are solved analytically using Hankel transform techniques with the Hankel inversion integrals calculated numer

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Pérez Sánchez, Lucía, Mariana Elizabeth Silva Torres, Silvia Maldonado Frías, et al. "Andamios impresos en 3D con poros heterogéneos como estrategia de regeneración ósea in vivo." Mundo Nano. Revista Interdisciplinaria en Nanociencias y Nanotecnología 18, no. 34 (2024): 1e—14e. http://dx.doi.org/10.22201/ceiich.24485691e.2025.34.69828.

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Andamios impresos en 3D con poros heterogéneos, surge como estrategia para la regeneración de tejidos. En este estudio, se evaluó la regeneración ósea en defectos críticos de ratas Wistar, debido a la osteoconducción de andamios de poliácido-láctico (PAL), impresos en 3D con diferentes tamaños de poros; 250-300 µm en la periferia, seguido de 350-400 µm y en el centro 400-740 µm, debido a que los pequeños promueven adhesión celular, mientras que los grandes la angiogénesis. Los andamios se imprimieron en 3D con PLA, un material termoplástico, biocompatible, biorreabsorbible, aprobado por la Adm

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Cabanillas-Casas, Cristopher J., Gustavo Cuba-Supanta, Justo Rojas Tapia, and Chachi Rojas-Ayala. "Efectos de forma y tamaño del poro sobre las propiedades mecánicas de las membranas del grafeno nanoporoso." MOMENTO, no. 62 (January 1, 2021): 63–78. http://dx.doi.org/10.15446/mo.n62.88422.

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En el presente trabajo se estudiaron los efectos de forma y tamaño de los poros sobre las propiedades mecánicas de membranas de grafeno nanoporosas (GNP). Las simulaciones de dinámica molecular fueron ejecutadas para estudiar las respuestas mecánicas y estructurales bajo una tracción uniaxial. Los resultados de las curvas tensión-deformación de las membranas de GNP muestran un comportamiento lineal elástico para razones de deformación pequeñas ($<$0.03) independiente de la dirección quiral. La anisotropía quiral (dirección armchair y zigzag) es notoria conforme se incrementa la deformación

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Salvini, V. R., M. D. M. Innocentini, and V. C. Pandolfelli. "Influência das condições de processamento cerâmico na resistência mecânica e na permeabilidade dos filtros de Al2O3-SiC." Cerâmica 48, no. 307 (2002): 121–25. http://dx.doi.org/10.1590/s0366-69132002000300003.

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Filtros cerâmicos devem apresentar alta permeabilidade e eficiência de retenção de inclusões sólidas, além de uma boa resistência mecânica. No entanto, estas propriedades variam de modos distintos para uma determinada estrutura celular. Poros grandes aumentam a permeabilidade, mas diminuem a eficiência de retenção das inclusões. Em relação ao desempenho do filtro, a porosidade aparente apresenta alta relevância, uma vez que a resistência mecânica diminui e a permeabilidade aumenta para valores de porosidade elevados. Neste trabalho investigou-se a relação entre a resistência mecânica e a perme

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Báez Pimiento, Sandro, María E. Hernández Rojas, Juan B. Ramírez Rebollar, Heber I. Suarez Andrade, and Manuel E. Palomar Pardavé. "ZINC SPONGES SYNTHESIS EMPLOYING THE REPLICATION PROCESS." Revista Colombiana de Materiales, no. 5 (May 16, 2014): 305–11. http://dx.doi.org/10.17533/udea.rcm.19241.

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Este trabajo reporta la fabricación de esponjas de Zn (espumas de Zn con poro abierto), las cuales fueron fabricadas usando procesos de infiltración de rellenos removibles. Se usaron lingotes de Zn del 99.8 % de pureza y NaCl particulado como relleno removible, con tres rangos de tamaño de partícula diferente: rango I de 4.75 a 3.98 mm, rango II de 3.98 a 3.35 mm, y rango III de 3.35 a 1.99 mm. En todos los casos, las espumas obtenidas mostraron una estructura altamente porosa con poros interconectados. Los valores de porosidad máxima y densidad mínima fueron 64 % and 2.5 g/cm3, respectivament

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Khokhlov, M. A., and D. A. Ishchenko. "Structural superlight porous metals (Review)." Paton Welding Journal 2015, no. 4 (2015): 57–62. http://dx.doi.org/10.15407/tpwj2015.04.08.

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WIĘZNOWSKA-MĄCZYŃSKA, KINGA, BEATA PIĘTA, and TOMASZ OPALA. "For and against family labor." PRZEGLĄD GINEKOLOGICZNO-POŁOŻNICZY 5, no. 6 (2005): 351–55. http://dx.doi.org/10.1066/s10014050066.

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48

Spalla, O., S. Lyonnard, and F. Testard. "Analysis of the small-angle intensity scattered by a porous and granular medium." Journal of Applied Crystallography 36, no. 2 (2003): 338–47. http://dx.doi.org/10.1107/s0021889803002279.

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Using X-ray scattering over a large range of scattering vectors, it is shown how to measure both the pore volume fraction and pore specific surface of an assembly of porous grains forming a powder. Depending on the presence or not of solvent in the inner pores and in the intergranular media, the scattered signal per unit volume of solid or per unit volume of grain are introduced, which allow a complete analysis even when the thickness of the layer and its compactness are unknown. The method is applied to three different systems presenting a well defined Porod regime at large scattering vector.

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Bravo Eslava, Luis Manuel, and César Antonio Gallardo Gutiérrez. "Evaluación comparativa de las características de porosidad entre el cemento Portland, MTA y Biodentine con microscopio electrónico de barrido." Revista Científica Odontológica 9, no. 1 (2021): e043. http://dx.doi.org/10.21142/2523-2754-0901-2021-043.

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Objetivo: El propósito del presente estudio fue evaluar comparativamente las características de porosidad entre el cemento Portland, MTA Angelus® y Biodentine Septodont®, observados con un microscopio electrónico de barrido. Materiales y métodos: Se prepararon los cementos según las indicaciones del fabricante y se empaquetaron en tubos cilíndricos de polietileno con un diámetro interno de 10 mm y una altura de 5 mm. Se analizó la porosidad de las muestras mediante el microscopio electrónico de barrido. El análisis estadístico se realizó utilizando la prueba Kruskal-Wallis. El nivel de signifi

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Lan, Yuan-Jyh, Tai-Wen Hsu, and Ching-Yu Chen. "ANALYSIS OF WAVE INTERACTION WITH SUBMERGED ADJACENT PORO-ELASTIC BREAKWATERS." Coastal Engineering Proceedings 1, no. 33 (2012): 31. http://dx.doi.org/10.9753/icce.v33.structures.31.

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In this study, the problem of wave interaction with two closely submerged adjacent porous elastic breakwaters is investigated theoretically. The porous elastic breakwaters are assumed to be homogeneous, isotropic and elastic. Lan and Lee’s (2010) analytical solution is extended to the problem subject to proper boundary conditions. Using general solutions for each region and the matching boundary conditions, a set of simultaneous equations is thus developed and solved numerically. The present analytic solutions compare favorably with simplified cases of the poro-elastic submerged breakwater. Ch

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