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	Author	Araya-Letelier, G.; Antico, F.C.; Burbano-Garcia, C.; Concha-Riedeld, J.; Norambuena-Contreras, J.; Concha, J.; Saavedra Flores, E.I.
	Title	Experimental evaluation of adobe mixtures reinforced with jute fibers			Type
	Year	2021	Publication	Construction and Building Materials	Abbreviated Journal	Constr. Build. Mater.
	Volume	276	Issue	2021	Pages	122127
	Keywords	Jute fibers; Fiber-reinforced composites; Thermal conductivity; Mechanical characterization; Damage and durability assessment
	Abstract	Due to their sustainability as well as physical and mechanical performance, different natural fibers, both vegetal and animal fibers, have been successfully used in adobe mixtures (AMs) to enhance properties such as cracking control, flexural toughness and water erosion resistance, among others. However, the use of jute fibers (JFs), one of the most largely produced vegetal fiber worldwide, has not been extensively studied on AMs. Consequently, this study evaluates the effects of the incorporation of varying dosages (0.5 and 2.0 wt%) and lengths (7, 15, and 30 mm) of JFs on the physical/thermal/mechanical/fracture and durability performance of AMs, a specific type of earth-based construction material widely used globally. Experimental results showed that the incorporation of 2.0 wt% dosages of JFs increased the capillary water absorption of AMs, which might affect AM durability. The latter result could be explained by the additional porosity generated by the spaces left between the JFs and the matrix of adobe, as well as the inherent water absorption of the JFs. The incorporation of JFs significantly improved the behavior of AMs in terms of thermal conductivity, drying shrinkage cracking control, flexural toughness and water erosion performance, without affecting their compressive and flexural strength. For example, flexural toughness indices were increased by 297% and crack density ratio as well as water erosion depth values were reduced by 93% and 62%, respectively, when 2.0 wt%-15 mm length JFs were incorporated into AM. Since the latter combination of JF dosage and length provided the overall best results among AMs, it is recommended by this study as JF-reinforcement scheme for AMs for construction applications such as adobe masonry and earth plasters.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0950-0618	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved
	Call Number	UAI @ alexi.delcanto @			Serial	1315
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	Author	Araya-Letelier, G.; Antico, F.C.; Carrasco, M.; Rojas, P.; Garcia-Herrera, C.M.
	Title	Effectiveness of new natural fibers on damage-mechanical performance of mortar			Type
	Year	2017	Publication	Construction And Building Materials	Abbreviated Journal	Constr. Build. Mater.
	Volume	152	Issue		Pages	672-682
	Keywords	Animal fiber; Fiber-reinforced mortar; Mechanical properties; Damage mitigation
	Abstract	Addition of fibers to cement-based materials improve tensile and flexural strength, fracture toughness, abrasion resistance, delay cracking, and reduce crack widths. Natural fibers have recently become more popular in the construction materials community. This investigation addresses the characterization of a new animal fiber (pig hair), a massive food-industry waste worldwide, and its use in mortars. Morphological, physical and mechanical properties of pig hair are determined in order to be used as reinforcement in mortars. A sensitivity analysis on the volumes of fiber in mortars is developed. The results from this investigation showed that reinforced mortars significantly improve impact strength, abrasion resistance, plastic shrinkage cracking, age at cracking, and crack widths as fiber volume increases. Other properties such as compressive and flexural strength, density, porosity and modulus of elasticity of reinforced mortars are not significantly affected by the addition of pig hair. (C) 2017 Elsevier Ltd. All rights reserved.
	Address	[Araya-Letelier, G.; Carrasco, M.] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Ave Diagonal Las Torres 2640, Santiago 7941169, Chile, Email: gerardo.araya@uai.cl;
	Corporate Author				Thesis
	Publisher	Elsevier Sci Ltd	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0950-0618	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000411545600062			Approved
	Call Number	UAI @ eduardo.moreno @			Serial	803
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	Author	Araya-Letelier, G.; Concha-Riedel, J.; Antico, F.C.; Valdes, C.; Caceres, G.
	Title	Influence of natural fiber dosage and length on adobe mixes damage-mechanical behavior			Type
	Year	2018	Publication	Construction And Building Materials	Abbreviated Journal	Constr. Build. Mater.
	Volume	174	Issue		Pages	645-655
	Keywords	Adobe mixes; Animal fiber; Mechanical properties; Damage control; Fiber-reinforced
	Abstract	This study addresses the use of a natural fiber (pig hair), a massive food-industry waste, as reinforcement in adobe mixes (a specific type of earthen material). The relevance of this work resides in the fact that earthen materials are still widely used worldwide because of their low cost, availability, and low environmental impact. Results show that adobe mixes' mechanical-damage behavior is sensitive to both (i) fiber dosage and (ii) fiber length. Impact strength and flexural toughness are increased, whereas shrinkage distributed crack width is reduced. Average values of compressive and flexural strengths are reduced as fiber dosage and length increase, as a result of porosity generated by fiber clustering. Based on the results of this work a dosage of 0.5% by weight of dry soil using 7 mm fibers is optimal to improve crack control, flexural toughness and impact strength without statistically affecting flexural and compressive strengths. (C) 2018 Elsevier Ltd. All rights reserved.
	Address	[Araya-Letelier, G.] Pontificia Univ Catolica Chile, Fac Ingn, Escuela Construcc Civil, Ave Vicuna Mackenna 4860, Santiago 7820436, Chile, Email: gerardo.araya@uc.cl;
	Corporate Author				Thesis
	Publisher	Elsevier Sci Ltd	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0950-0618	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000433656300061			Approved
	Call Number	UAI @ eduardo.moreno @			Serial	873
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	Author	Araya-Letelier, G.; Maturana, P.; Carrasco, M.; Antico, F.C.; Gomez, M.S.
	Title	Mechanical-Damage Behavior of Mortars Reinforced with Recycled Polypropylene Fibers			Type
	Year	2019	Publication	Sustainability	Abbreviated Journal	Sustainability
	Volume	11	Issue	8	Pages	17 pp
	Keywords	recycled polypropylene fiber; fiber-reinforced mortar; mechanical performance; damage reduction; waste valorization
	Abstract	Commercial polypropylene fibers are incorporated as reinforcement of cement-based materials to improve their mechanical and damage performances related to properties such as tensile and flexural strength, toughness, spalling and impact resistance, delay formation of cracks and reducing crack widths. Yet, the production of these polypropylene fibers generates economic costs and environmental impacts and, therefore, the use of alternative and more sustainable fibers has become more popular in the research materials community. This paper addresses the characterization of recycled polypropylene fibers (RPFs) obtained from discarded domestic plastic sweeps, whose morphological, physical and mechanical properties are provided in order to assess their implementation as fiber-reinforcement in cement-based mortars. An experimental program addressing the incorporation of RPFs on the mechanical-damage performance of mortars, including a sensitivity analysis on the volumes and lengths of fiber, is developed. Using analysis of variance, this paper shows that RPFs statistically enhance flexural toughness and impact strength for high dosages and long fiber lengths. On the contrary, the latter properties are not statistically modified by the incorporation of low dosages and short lengths of RPFs, but still in these cases the incorporation of RPFs in mortars have the positive environmental impact of waste encapsulation. In the case of average compressive and flexural strength of mortars, these properties are not statistically modified when adding RPFs.
	Address	[Araya-Letelier, Gerardo; Maturana, Pablo; Soledad Gomez, Maria] Pontificia Univ Catolica Chile, Escuela Construcc Civil, Ave Vicuna Mackenna 4860, Santiago 7820436, Chile, Email: gerardo.araya@uc.cl;
	Corporate Author				Thesis
	Publisher	Mdpi	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	2071-1050	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000467752200013			Approved
	Call Number	UAI @ eduardo.moreno @			Serial	1001
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	Author	Baier, R.V.; Raggio, J.I.C.; Arancibia, C.T.; Bustamante, M.; Perez, L.; Burda, I.; Aiyangar, A.; Vivanco, J.F.
	Title	Structure-function assessment of 3D-printed porous scaffolds by a low-cost/ open source fused filament fabrication printer			Type
	Year	2021	Publication	Materials Science & Engineering C-Materials For Biological Applications	Abbreviated Journal	Mater. Sci. Eng. C-Mater. Biol. Appl.
	Volume	123	Issue		Pages	111945
	Keywords	3D printer; Scaffold; Fused filament fabrication; Mechanical properties; Finite element method; Cell adhesion efficiency
	Abstract	Additive manufacturing encompasses a plethora of techniques to manufacture structures from a computational model. Among them, fused filament fabrication (FFF) relies on heating thermoplastics to their fusion point and extruding the material through a nozzle in a controlled pattern. FFF is a suitable technique for tissue engineering, given that allows the fabrication of 3D-scaffolds, which are utilized for tissue regeneration purposes. The objective of this study is to assess a low-cost/open-source 3D printer (In-House), by manufacturing both solid and porous samples with relevant microarchitecture in the physiological range (100?500 ?m pore size), using an equivalent commercial counterpart for comparison. For this, compressive tests in solid and porous scaffolds manufactured in both printers were performed, comparing the results with finite element analysis (FEA) models. Additionally, a microarchitectural analysis was done in samples from both printers, comparing the measurements of both pore size and porosity to their corresponding computer-aided design (CAD) models. Moreover, a preliminary biological assessment was performed using scaffolds from our In-House printer, measuring cell adhesion efficiency. Finally, Fourier transform infrared spectroscopy ? attenuated total reflectance (FTIR?ATR) was performed to evaluate chemical changes in the material (polylactic acid) after fabrication in each printer. The results show that the In-House printer achieved generally better mechanical behavior and resolution capacity than its commercial counterpart, by comparing with their FEA and CAD models, respectively. Moreover, a preliminary biological assessment indicates the feasibility of the In-House printer to be used in tissue engineering applications. The results also show the influence of pore geometry on mechanical properties of 3D-scaffolds and demonstrate that properties such as the apparent elastic modulus (Eapp) can be controlled in 3D-printed scaffolds.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0928-4931	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000636846700007			Approved
	Call Number	UAI @ alexi.delcanto @			Serial	1367
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	Author	Bugedo, G.; Tobar, E.; Alegria, L.; Oviedo, V.; Arellano, D.; Basoalto, R.; Enberg, L.; Suarez, P.; Bitran, E.; Chabert, S.; Bruhn, A.
	Title	Development of mechanical ventilators in Chile. Chronicle of the initiative "Un Respiro para Chile			Type
	Year	2023	Publication	Revista Medica de Chile	Abbreviated Journal	Rev. Med. Chile
	Volume	150	Issue	7	Pages	958-965
	Keywords	COVID-19; Critical Care; Respiration; Artificial; Ventilators; Mechanical
	Abstract	At the beginning of the COVID-19 pandemic in Chile, in March 2020, a projection indicated that a significant group of patients with pneumonia would require admission to an Intensive Care Unit and connection to a mechanical ventilator. Therefore, a paucity of these devices and other supplies was predicted. The initiative “Un respiro para Chile” brought together many people and institutions, public and private. In the course of three months, it allowed the design and building of several ventilatory assistance devices, which could be used in critically ill patients.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0034-9887	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000968680000014			Approved
	Call Number	UAI @ alexi.delcanto @			Serial	1797
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	Author	Chavez-Vásconez, R.; Arévalo, C.; Torres, Y.; Reyes-Valenzuela, M.; Sauceda, S.; Salvo, C.; Mangalaraja, R.V.; Montealegre, I.; Perez-Soriano, E.M.; Lascano, S.
	Title	Understanding the synergetic effects of mechanical milling and hot pressing on bimodal microstructure and tribo-mechanical behavior in porous Ti structures			Type
	Year	2023	Publication	Journal of Materials Research and Technology	Abbreviated Journal	J. Mater. Res. Technol.
	Volume	27	Issue		Pages	5243-5256
	Keywords	porous titanium; Bimodal microstructure; Hot-pressing; Powder metallurgy; Mechanical milling; Mechanical behavior
	Abstract	The utilization of porous biomedical implants featuring a bimodal microstructure has garnered substantial interest within the scientific community. This study delves into the intricate interplay between processing parameters, microstructural attributes, and the tribo-mechanical performance of titanium grade 4, showcasing its potential to serve as implants to address compromised cortical bone tissue. The investigation meticulously examines the impact of milling duration (10 and 20 h), proportion of milled powder (50 and 75 wt%), and the volume fraction of space-holding agents (40-60 vol% NaCl) on the resulting characteristics of the bimodal microstructure, which plays a crucial role in achieving optimal biomechanical equilibrium. The Vickers microhardness, conventional and instrumented (P-h curves), and the wear behavior (ball-on disk) are discussed in terms of bimodal microstructure distribution, particle size and porosity level inherent to the fabrication conditions (mechanical milling + space-holder + hot-pressing). In general terms, milling time and milled powder fraction were the most influent parameters on the final properties of the materials. With the processing route used, the achieved microhardness values and wear behavior are comparable with those obtained by means of surface modifications or alloys. The Young's moduli obtained were in the range of 30-50 GPa, which could help to reduce the shielding phenomenon, while presenting a good mechanical resistance and wear behavior. In light of these findings, the fabricated specimen, composed of 75 wt% milled powder subjected to a 10-h milling duration, supplemented by a 60 vol% fraction of NaCl, emerges as a prime candidate manifesting superior biomechanical equilibrium. This judicious configuration exhibits a promising trajectory for its application in bone replacement endeavors.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	2238-7854	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:001115520800001			Approved
	Call Number	UAI @ alexi.delcanto @			Serial	1923
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	Author	Collins, C.J.; Vivanco, J.F.; Sokn, S.A.; Williams, B.O.; Burgers, T.A.; Ploeg, H.L.
	Title	Fracture healing in mice lacking Pten in osteoblasts: a micro-computed tomography image-based analysis of the mechanical properties of the femur			Type
	Year	2015	Publication	Journal Of Biomechanics	Abbreviated Journal	J. Biomech.
	Volume	48	Issue	2	Pages	310-317
	Keywords	Fracture healing; Mouse femur; Pten gene; Micro computed tomography image-based analysis; Section properties; Mechanical properties; Four-point bend testing
	Abstract	In the United States, approximately eight million osseous fractures are reported annually, of which 5-10% fail to create a bony union. Osteoblast-specific deletion of the gene Pten in mice has been found to stimulate bone growth and accelerate fracture healing. Healing rates at four weeks increased in femurs from Pten osteoblast conditional knock-out mice (Pten-CKO) compared to wild-type mice (WT) of the same genetic strain as measured by an increase in mechanical stiffness and failure load in four-point bending tests. Preceding mechanical testing, each femur was imaged using a Skyscan 1172 micro-computed tomography (mu CT) scanner (Skyscan, Kontich, Belgium). The present study used μCT image-based analysis to test the hypothesis that the increased femoral fracture force and stiffness in Pten-CKO were due to greater section properties with the same effective material properties as that of the WT. The second moment of area and section modulus were computed in ImageJ 1.46 (National Institutes of Health) and used to predict the effective flexural modulus and the stress at failure for fourteen pairs of intact and callus WT and twelve pairs of intact and callus Pten-CKO femurs. For callus and intact femurs, the failure stress and tissue mineral density of the Pten-CKO and WT were not different; however, the section properties of the Pten-CKO were more than twice as large 28 days post-fracture. It was therefore concluded, when the gene Pten was conditionally knocked-out in osteoblasts, the resulting increased bending stiffness and force to fracture were due to increased section properties. (C) 2014 Elsevier Ltd. All rights reserved.
	Address	[Collins, Caitlyn J.; Vivanco, Juan F.; Sokn, Scott A.; Ploeg, Heidi-Lynn] Univ Wisconsin, Dept Mech Engn, Madison, WI 53706 USA, Email: ploeg@engr.wisc.edu
	Corporate Author				Thesis
	Publisher	Elsevier Sci Ltd	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0021-9290	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000349194800018			Approved
	Call Number	UAI @ eduardo.moreno @			Serial	454
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	Author	Concha-Riedel, J.; Antico, F.C.; Lopez-Querol, S.
	Title	Mechanical strength, mass loss and volumetric changes of drying adobe matrices combined with kaolin and fine soil particles			Type
	Year	2021	Publication	Construction And Building Materials	Abbreviated Journal	Constr. Build. Mater.
	Volume	312	Issue		Pages	125246
	Keywords	Earth blocks; Kaolin; Mechanical strength; Drying shrinkage; Clay; Soil fine-particles; Adobe matrix; Chemical Shrinkage
	Abstract	Earthen construction represents almost 30% of the housing in developing countries, partially because of its low cost compared to steel and concrete construction, and also because the raw materials are available almost everywhere. One of the biggest disadvantages of earthen materials is the lack of information and variety on their constitutive materials, specifically their soil type. This work addresses the physical and mechanical properties of adobe matrices containing different concentrations of kaolin, which is a specific type of clay, as well as different proportions of fine particles of the original soil of the adobe matrix. All adobe matrices were manufactured with a SM-SC soil obtained from Santiago, Chile, and had concentrations of 0, 10, 30, and 50% of kaolin and 0, 10, 20, and 30% fines of the original soil content. It is concluded that the compressive strength of the studied earthen mixtures improves when kaolin is added to the mixture. The shrinkage of adobe matrices with kaolin compared to plain adobe matrices was reduced during the first days of age and stayed stable after that. This work shows that the inclusion of fines from the original soil (other than kaolin) did not significantly affect any of the studied properties. It also shows that the Unified Soil Classification System is not sufficient to characterize soils for adobe matrices.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0950-0618	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000722640300001			Approved
	Call Number	UAI @ alexi.delcanto @			Serial	1503
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	Author	Contreras-Raggio, J.I.; Arancibia, C.T.; Millan, C.; Ploeg, H.L.; Aiyangar, A.; Vivanco, J.F.
	Title	Height-to-Diameter Ratio and Porosity Strongly Influence Bulk Compressive Mechanical Properties of 3D-Printed Polymer Scaffolds			Type
	Year	2022	Publication	Polymers	Abbreviated Journal	Polymers
	Volume	14	Issue	22	Pages	5017
	Keywords	polymer scaffolds; 3D printing; height; diameter ratio; porosity; pore size; mechanical properties
	Abstract	Although the architectural design parameters of 3D-printed polymer-based scaffolds-porosity, height-to-diameter (H/D) ratio and pore size-are significant determinants of their mechanical integrity, their impact has not been explicitly discussed when reporting bulk mechanical properties. Controlled architectures were designed by systematically varying porosity (30-75%, H/D ratio (0.5-2.0) and pore size (0.25-1.0 mm) and fabricated using fused filament fabrication technique. The influence of the three parameters on compressive mechanical properties-apparent elastic modulus E-app, bulk yield stress sigma(y) and yield strain epsilon(y)-were investigated through a multiple linear regression analysis. H/D ratio and porosity exhibited strong influence on the mechanical behavior, resulting in variations in mean E-app of 60% and 95%, respectively. sigma(y) was comparatively less sensitive to H/D ratio over the range investigated in this study, with 15% variation in mean values. In contrast, porosity resulted in almost 100% variation in mean sigma(y) values. Pore size was not a significant factor for mechanical behavior, although it is a critical factor in the biological behavior of the scaffolds. Quantifying the influence of porosity, H/D ratio and pore size on bench-top tested bulk mechanical properties can help optimize the development of bone scaffolds from a biomechanical perspective.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	2073-4360	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000887647600001			Approved
	Call Number	UAI @ alexi.delcanto @			Serial	1655
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	Author	Jara-Munoz, P.; Guzman-Fierro, V.; Arriagada, C.; Campos, V.; Campos, J.L.; Gallardo-Rodriguez, J.J.; Fernandez, K.; Roeckel, M.
	Title	Low oxygen start-up of partial nitrification-anammox process: mechanical or gas agitation?			Type
	Year	2019	Publication	Journal Of Chemical Technology And Biotechnology	Abbreviated Journal	J. Chem. Technol. Biotechnol.
	Volume	94	Issue	2	Pages	475-483
	Keywords	mechanical agitation; partial nitrification anammox; dissolved oxygen; gas agitation; granule
	Abstract	BACKGROUND Partial nitrification-anammox (PN-A) is a widely recognized technology to remove nitrogen from different types of wastewater. Low oxygen concentration is the most used strategy for PN-A start-up, but stability problems arise during the operation; thus, in the present study the effects of the type of agitation, oxygenation and shear stress on the sensitivity, energy consumption and performance were evaluated. Recognition of these parameters allows considered choice of the design of an industrial process for nitrogen abatement. RESULTS A mechanically agitated reactor (MAR) was compared to a stable, long-term operation period bubble column reactor (BCR), both started under low dissolved oxygen concentration conditions. MAR microbial assays confirmed the destruction of the nitrifying layer and an imbalance of the entire process when the oxygen to nitrogen loading ratio (O-2:N) decreased by 25%. The granule sedimentation rate and specific anammox activity were 17% and 87% higher (respectively) in BCR. Economic analysis determined that the cost of aeration for the MAR and for the BCR were 23.8% and 1% of the total PN-A energy consumption, respectively. CONCLUSIONS The BCR showed better results than the MAR. This study highlights the importance of type of agitation, oxygenation and shear stress for industrial-scale PN-A designs. (c) 2018 Society of Chemical Industry
	Address	[Jara-Munoz, Pamela; Guzman-Fierro, Victor; Arriagada, Constanza; Jose Gallardo-Rodriguez, Juan; Fernandez, Katherina; Roeckel, Marlene] Univ Concepcion, Dept Chem Engn, Fac Engn, Concepcion, Chile, Email: mroeckel@udec.cl
	Corporate Author				Thesis
	Publisher	Wiley	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0268-2575	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000455262100014			Approved
	Call Number	UAI @ eduardo.moreno @			Serial	972
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	Author	Martinez, C.; Briones, F.; Aguilar, C.; Araya, N.; Iturriza, I.; Machado, I.; Rojas, P.
	Title	Effect of hot pressing and hot isostatic pressing on the microstructure, hardness, and wear behavior of nickel			Type
	Year	2020	Publication	Materials Letters	Abbreviated Journal	Mater. Lett.
	Volume	273	Issue		Pages	127944
	Keywords	MECHANICAL-PROPERTIES; RESISTANCE; NANO
	Abstract	Nanocrystalline Ni (Ni-nc) obtained by mechanical milling may present improved mechanical properties paired with high abrasion resistance. Different sintering processes were used to consolidate Nanocrystaline Ni: hot pressed (HP) and hot-isostatic pressed (HIP). The microstructure, mechanical properties, and tribological were evaluated to compare the processes. X-ray diffraction patterns showed that HIP-consolidated specimens had larger crystallite sizes and 37% less microstrain when compared to the HP specimens. The nanohardness of the HIP specimens was also carried out and it was 50% lower than that of HP specimens, whereas its coefficient of friction found was 25% higher. These results show the advantages of the HP process over the HIP since the high pressure. The low sintering temperature of HP inhibited the grain growth, which leads excellent mechanical and tribological properties of Ni. (C) 2020 Elsevier B.V. All rights reserved.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0167-577X	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000538775300023			Approved
	Call Number	UAI @ alexi.delcanto @			Serial	1403
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	Author	Meyer, L.A.; Johnson, M.G.; Cullen, D.M.; Vivanco, J.F.; Blank, R.D.; Ploeg, H.L.; Smith, E.L.
	Title	Combined exposure to big endothelin-1 and mechanical loading in bovine sternal cores promotes osteogenesis			Type
	Year	2016	Publication	Bone	Abbreviated Journal	Bone
	Volume	85	Issue		Pages	115-122
	Keywords	Endothelin; Mechanical loading; Trabecular bone; Osteogenesis; Bioreactor
	Abstract	Increased bone formation resulting from mechanical loading is well documented; however, the interactions of the mechanotransduction pathways are less well understood. Endothelin-1, a ubiquitous autocrine/paracrine signaling molecule promotes osteogenesis in metastatic disease. In the present study, it was hypothesized that exposure to big endothelin-1 (big ET1) and/or mechanical loading would promote osteogenesis in ex vivo trabecular bone cores. In a 2 x 2 factorial trial of daily mechanical loading (-2000 μepsilon,120 cycles daily, “jump” waveform) and big ET1 (25 ng/mL), 48 bovine sternal trabecular bone cores were maintained in bioreactor chambers for 23 days. The bone cores' response to the treatment stimuli was assessed with percent change in core apparent elastic modulus (Delta E-app), static and dynamic histomorphometry, and prostaglandin E2 (PGE2) secretion. Two-way ANOVA with a post hoc Fisher's LSD test found no significant treatment effects on Delta E-app (p = 0.25 and 0.51 for load and big ET1, respectively). The Delta E-app in the “no load + big ET1” (CE, 13 +/- 12.2%, p = 0.56), “load + no big ET1” (LC, 17 +/- 3.9%, p = 0.14) and “load + big ETI” (LE, 19 +/- 4.2%, p = 0.13) treatment groups were not statistically different than the control group (CC, 3.3% +/- 8.6%). Mineralizing surface (MS/BS), mineral apposition (MAR) and bone formation rates (BFR/BS) were significantly greater in LE than CC (p = 0.037, 0.0040 and 0.019, respectively). While the histological bone formation markers in LC trended to be greater than CC (p = 0.055, 0.11 and 0.074, respectively) there was no difference between CE and CC (p = 0.61, 0.50 and 0.72, respectively). Cores in LE and LC had more than 50% greater MS/BS (p = 0.037, p = 0.055 respectively) and MAR (p = 0.0040, p = 0.11 respectively) than CC. The BFR/BS was more than two times greater in LE (p = 0.019) and LC (p = 0.074) than CC. The PGE2 levels were elevated at 8 days post-osteotomy in all groups and the treatment groups remained elevated compared to the CC group on days 15,19 and 23. The data suggest that combined exposure to big ET1 and mechanical loading results in increased osteogenesis as measured in biomechanical, histomorphometric and biochemical responses. (C) 2016 Elsevier Inc. All rights reserved.
	Address	[Meyer, Luisa A.; Vivanco, Juan F.; Ploeg, Heidi-Lynn] Univ Wisconsin, Dept Mech Engn, 1513 Univ Ave, Madison, WI 53706 USA, Email: lameyer2@wisc.edu;
	Corporate Author				Thesis
	Publisher	Elsevier Science Inc	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	8756-3282	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000372770200015			Approved
	Call Number	UAI @ eduardo.moreno @			Serial	606
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	Author	Norambuena-Contreras, J.; Gonzalez-Torre, I.; Vivanco, J.F.; Gacitua, W.
	Title	Nanomechanical properties of polymeric fibres used in geosynthetics			Type
	Year	2016	Publication	Polymer Testing	Abbreviated Journal	Polym. Test
	Volume	54	Issue		Pages	67-77
	Keywords	Polymeric fibres; Geosynthetics; Nanomechanical properties; Nanoindentation; Damage evaluation
	Abstract	Geosynthetics are composite materials manufactured using different types of polymeric fibres, usually employed as anti-reflective cracking systems in asphalt pavements. Materials that compose geosynthetics can be damaged due to mechanical and thermal effects produced during the installation process under hot mix asphalts. In this paper, different polymeric fibres extracted from geosynthetics have been evaluated using nanoindentation tests. The main objective was to evaluate the effect of installation process (dynamic compaction and thermal damage) on the mechanical behaviour of individual polymeric fibres at nano-scale. To do this, elastic modulus (E) and hardness (H) of three different polymeric fibres commonly used in geosynthetics (polypropylene, polyester and polyvinyl-alcohol), in two testing directions and under two different states have been studied. Main conclusions of this work are that mechanical properties of geosynthetics individual fibres can change after installation, producing changes in the behaviour of geosynthetics at macro-scale with consequences in the pavement functionality, and that these changes are different depending on the material that composed the fibres. (C) 2016 Elsevier Ltd. All rights reserved.
	Address	[Norambuena-Contreras, J.; Gonzalez-Torre, I.] Univ Bio Bio, LabMat UBB, Dept Civil & Environm Engn, Concepcion, Chile, Email: irene.gonzaleztorre@gmail.com
	Corporate Author				Thesis
	Publisher	Elsevier Sci Ltd	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0142-9418	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000382798300009			Approved
	Call Number	UAI @ eduardo.moreno @			Serial	651
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	Author	Park, Y.; Fuentes-Hernandez, C.; Kim, K.; Chou, W.F.; Larrain, F.A.; Graham, S.; Pierron, O.N.; Kippelen, B.
	Title	Skin-like low-noise elastomeric organic photodiodes			Type
	Year	2021	Publication	Sciences Advances	Abbreviated Journal	Sci. Adv.
	Volume	7	Issue	51	Pages	eabj6565
	Keywords	MECHANICAL-PROPERTIES; POLYMER
	Abstract	Stretchable optoelectronics made of elastomeric semiconductors could enable the integration of intelligent systems with soft materials, such as those of the biological world. Organic semiconductors and photodiodes have been engineered to be elastomeric; however, for photodetector applications, it remains a challenge to identify an elastomeric bulk heterojunction (e-BHJ) photoactive layer that combines a low Young's modulus and a high strain at break that yields organic photodiodes with low electronic noise values and high photodetector performance. Here, a blend of an elastomer, a donor-like polymer, and an acceptor-like molecule yields a skin-like e-BHJ with a Young's modulus of a few megapascals, comparable to values of human tissues, and a high strain at break of 189%. Elastomeric organic photodiodes based on e-BHJ photoactive layers maintain low electronic noise current values in the tens of femtoamperes range and noise equivalent power values in the tens of picowatts range under at least 60% strain.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	2375-2548	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000730600400021			Approved
	Call Number	UAI @ alexi.delcanto @			Serial	1508
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	Author	Slane, J.; Vivanco, J.; Ebenstein, D.; Squire, M.; Ploeg, H.L.
	Title	Multiscale characterization of acrylic bone cement modified with functionalized mesoporous silica nanoparticles			Type
	Year	2014	Publication	Journal Of The Mechanical Behavior Of Biomedical Materials	Abbreviated Journal	J. Mech. Behav. Biomed. Mater.
	Volume	37	Issue		Pages	141-152
	Keywords	Bone cement; Mechanical properties; Nanoindentation; Reinforced polymer; Orthopedics
	Abstract	Acrylic bone cement is widely used to anchor orthopedic implants to bone and mechanical failure of the cement mantle surrounding an implant can contribute to aseptic loosening. In an effort to enhance the mechanical properties of bone cement, a variety of nanoparticles and fibers can be incorporated into the cement matrix. Mesoporous silica nanoparticles (MSNs) are a class of particles that display high potential for use as reinforcement within bone cement. Therefore, the purpose of this study was to quantify the impact of modifying an acrylic cement with various low-loadings of mesoporous silica. Three types of MSNs (one plain variety and two modified with functional groups) at two loading ratios (0.1 and 0.2 wt/wt) were incorporated into a commercially available bone cement. The mechanical properties were characterized using four-point bending, microindentation and nanoindentation (static, stress relaxation, and creep) while material properties were assessed through dynamic mechanical analysis, differential scanning calorimetry, thermogravimetric analysis, FTIR spectroscopy, and scanning electron microscopy. Four-point flexural testing and nanoindentation revealed minimal impact on the properties of the cements, except for several changes in the nano-level static mechanical properties. Conversely, microindentation testing demonstrated that the addition of MSNs significantly increased the microhardness. The stress relaxation and creep properties of the cements measured with nanoindentation displayed no effect resulting from the addition of MSNs. The measured material properties were consistent among all cements. Analysis of scanning electron micrographs images revealed that surface functionalization enhanced particle dispersion within the cement matrix and resulted in fewer particle agglomerates. These results suggest that the loading ratios of mesoporous silica used in this study were not an effective reinforcement material. Future work should be conducted to determine the impact of higher MSN loading ratios and alternative functional groups. (C) 2014 Elsevier Ltd. All rights reserved.
	Address	[Slane, Josh; Ploeg, Heidi-Lynn] Univ Wisconsin, Mat Sci Program, Madison, WI 53706 USA, Email: jaslane@wisc.edu
	Corporate Author				Thesis
	Publisher	Elsevier Science Bv	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1751-6161	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000340987100015			Approved
	Call Number	UAI @ eduardo.moreno @			Serial	404
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	Author	Slane, J.; Vivanco, J.; Rose, W.; Ploeg, H.L.; Squire, M.
	Title	Mechanical, material, and antimicrobial properties of acrylic bone cement impregnated with silver nanoparticles			Type
	Year	2015	Publication	Materials Science & Engineering C-Materials For Biological Applications	Abbreviated Journal	Mater. Sci. Eng. C-Mater. Biol. Appl.
	Volume	48	Issue		Pages	188-196
	Keywords	Bone cement; Infection; Nanoparticles; Antimicrobial; Mechanical properties
	Abstract	Prosthetic joint infection is one of the most serious complications that can lead to failure of a total joint replacement. Recently, the rise of multidrug resistant bacteria has substantially reduced the efficacy of antibiotics that are typically incorporated into acrylic bone cement. Silver nanoparticles (AgNPs) are an attractive alternative to traditional antibiotics resulting from their broad-spectrum antimicrobial activity and low bacterial resistance. The purpose of this study, therefore, was to incorporate metallic silver nanoparticles into acrylic bone cement and quantify the effects on the cement's mechanical, material and antimicrobial properties. AgNPs at three loading ratios (025, 0.5, and 1.0% wt/wt) were incorporated into a commercial bone cement using a probe sonication technique. The resulting cements demonstrated mechanical and material properties that were not substantially different from the standard cement. Testing against Staphylococcus aureus and Staphylococcus epidermidis using Kirby-Bauer and time-kill assays demonstrated no antimicrobial activity against planktonic bacteria. In contrast, cements modified with AgNPs significantly reduced biofilm formation on the surface of the cement. These results indicate that AgNP-loaded cement is of high potential for use in primary arthroplasty where prevention of bacterial surface colonization is vital. (C) 2014 Elsevier B.V. All rights reserved.
	Address	[Slane, Josh; Squire, Matthew] Univ Wisconsin, Dept Orthoped & Rehabil, Madison, WI USA, Email: jaslane@wisc.edu
	Corporate Author				Thesis
	Publisher	Elsevier Science Bv	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0928-4931	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000348749200025			Approved
	Call Number	UAI @ eduardo.moreno @			Serial	623
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	Author	Slane, J.; Vivanco, J.F.; Squire, M.; Ploeg, H.L.
	Title	Characterization of the quasi-static and viscoelastic properties of orthopaedic bone cement at the macro and nanoscale			Type
	Year	2017	Publication	Journal Of Biomedical Materials Research Part B-Applied Biomaterials	Abbreviated Journal	J. Biomed. Mater. Res. Part B
	Volume	105	Issue	6	Pages	1461-1468
	Keywords	bone cement; nanoindentation; mechanical testing; creep; orthopaedics
	Abstract	Acrylic bone cement is often used in total joint replacement procedures to anchor an orthopaedic implant to bone. Bone cement is a viscoelastic material that exhibits creep and stress relaxation properties, which have been previously characterized using a variety of techniques such as flexural testing. Nanoindentation has become a popular method to characterize polymer mechanical properties at the nanoscale due to the technique's high sensitivity and the small sample volume required for testing. The purpose of the present work therefore was to determine the mechanical properties of bone cement using traditional macroscale techniques and compare the results to those obtained from nanoindentation. To this end, the quasi-static and viscoelastic properties of two commercially available cements, Palacos and Simplex, were assessed using a combination of three-point bending and nanoindentation. Quasi-static properties obtained from nanoindentation tended to be higher relative to three-point bending. The general displacement and creep compliance trends were similar for the two methods. These findings suggest that nanoindentation is an attractive characterization technique for bone cement, due to the small sample volumes required for testing. This may prove particularly useful in testing failed/ retrieved cement samples from patients where material availability is typically limited. (C) 2016 Wiley Periodicals, Inc.
	Address	[Slane, Josh] Katholieke Univ Leuven, Univ Hosp Leuven, Inst Orthopaed Res & Training, Pellenberg, Belgium, Email: joshua.slane@kuleuven.be
	Corporate Author				Thesis
	Publisher	Wiley	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1552-4973	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000407055400016			Approved
	Call Number	UAI @ eduardo.moreno @			Serial	752
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	Author	Slane, J.A.; Vivanco, J.F.; Rose, W.E.; Squire, M.W.; Ploeg, H.L.
	Title	The influence of low concentrations of a water soluble poragen on the material properties, antibiotic release, and biofilm inhibition of an acrylic bone cement			Type
	Year	2014	Publication	Materials Science & Engineering C-Materials For Biological Applications	Abbreviated Journal	Mater. Sci. Eng. C-Mater. Biol. Appl.
	Volume	42	Issue		Pages	168-176
	Keywords	Bone cement; Infection; Drug release; Mechanical properties; Biofilm
	Abstract	Soluble particulate fillers can be incorporated into antibiotic-loaded acrylic bone cement in an effort to enhance antibiotic elution. Xylitol is a material that shows potential for use as a filler due to its high solubility and potential to inhibit biofilm formation. The objective of this work, therefore, was to investigate the usage of low concentrations of xylitol in a gentamicin-loaded cement. Five different cements were prepared with various xylitol loadings (0, 1, 2.5, 5 or 10 g) per cement unit, and the resulting impact on the mechanical properties, cumulative antibiotic release, biofilm inhibition, and thermal characteristics were quantified. Xylitol significantly increased cement porosity and a sustained increase in gentamicin elution was observed in all samples containing xylitol with a maximum cumulative release of 41.3%. Xylitol had no significant inhibitory effect on biofilm formation. All measured mechanical properties tended to decrease with increasing xylitol concentration; however, these effects were not always significant. Polymerization characteristics were consistent among all groups with no significant differences found. The results from this study indicate that xylitol-modified bone cement may not be appropriate for implant fixation but could be used in instances where sustained, increased antibiotic elution is warranted, such as in cement spacers or beads. (C) 2014 Elsevier B.V. All rights reserved.
	Address	[Slane, Josh A.; Ploeg, Heidi-Lynn] Univ Wisconsin, Mat Sci Program, Madison, WI 53706 USA, Email: jaslane@wisc.edu
	Corporate Author				Thesis
	Publisher	Elsevier Science Bv	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0928-4931	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000340687400024			Approved
	Call Number	UAI @ eduardo.moreno @			Serial	403
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	Author	Varona, J.; De Fazio, R.; Velazquez, R.; Giannoccaro, N.I.; Carrasco, M.; Visconti, P.
	Title	MEMS-based Micro-scale Wind Turbines as Energy Harvesters of the Convective Airflows in Microelectronic Circuits			Type
	Year	2020	Publication	International Journal Of Renewable Energy Research	Abbreviated Journal	Int. J. Renew. Energy. Res.
	Volume	10	Issue	3	Pages	1213-1225
	Keywords	Energy harvesting; micro-electro-mechanical system (MEMS); micro-turbine; silicon-based fabrication process
	Abstract	As an alternative to conventional batteries and other energy scavenging techniques, this paper introduces the idea of using micro-turbines to extract energy from wind forces at the microscale level and to supply power to battery-less microsystems. Fundamental research efforts on the design, fabrication, and test of micro-turbines with blade lengths of just 160 μm are presented in this paper along with analytical models and preliminary experimental results. The proof-of-concept prototypes presented herein were fabricated using a standard polysilicon surface micro-machining silicon technology (PolyMUMPs) and could effectively transform the kinetic energy of the available wind into a torque that might drive an electric generator or directly power supply a micro-mechanical system. Since conventional batteries do not scale-down well to the microscale, wind micro-turbines have the potential for becoming a practical alternative power source for microsystems, as well as for extending the operating range of devices running on batteries.
	Address	[Varona, J.; Velazquez, R.] Univ Panamer, Fac Ingn, Aguascalientes 20290, Aguascalientes, Mexico, Email: jvarona@up.edu.mx;
	Corporate Author				Thesis
	Publisher	Int Journal Renewable Energy Research	Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1309-0127	ISBN		Medium
	Area		Expedition		Conference
	Notes	WOS:000575124800016			Approved
	Call Number	UAI @ alexi.delcanto @			Serial	1249
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