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3D printing of ABS *** of processing and effects of multi-wall and single-wall carbon nanotubes on thermal,mechanical and electrical properties

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journal of Materials Science & Technology 2022年第26期121卷 52-66页

作者： Sithiprumnea Dul Brenda j.alonso Gutierrez Alessandro Pegoretti jaime Alvarez-Quintana Luca Fambri Department of Industrial Engineering and INSTM Research Unit University of TrentoTrento 38123Italy Centro de Investigación en Materiales Avanzados S.C.Unidad MonterreyApodaca 66600Mexico Facultad de Ingeniería Mecánica y Eléctrica Universidad Autónoma de Nuevo LeónAvenida Universidad s/nCiudad UniversitariaSan Nicolás de los Garza 66451México

The following paper reports on a comparative study of the effects of two types of carbon nanotubes,namely multiwall(MWCNT)and single-wall(SWCNT)carbon nanotube,on the properties of 3D-printed parts produced with acrylonitrile-butadiene-styrene(ABS)nanocomposites with various CNT loadings of5-10 wt.%.Quasi-static tensile properties and Vicat softening temperature of 3D-printed parts were enhanced with the increasing CNT *** highest enhancement in tensile properties was observed for the ABS/CNT nanocomposites at 10 wt.%filler loading.3D-printed ABS/SWCNT composites showed higher tensile modulus,better creep stability and higher Vicat ***,the strength of ABS/SWCNT 3D samples is relatively lower than that of ABS/*** addition,3D-printed parts exhibited anisotropic electrical conductive behaviour,which has a conductivity of through-layer of about2-3 orders of magnitude higher than *** highest conductivity of 3D-printed samples reached25.2 S/m,and 9.3 S/m for ABS/MWCNT and ABS/SWCNT composites at 10 wt.%,*** results obtained,*** successful fuse filament fabrication and the consequent electromechanical properties,confirm that these 3D printable nanocomposite could be properly utilized for the production,and application up to about 90°C,of thermoelectric devices and/or resistors for flexible circuits.

关键词： Fuse filament fabrication Conductive polymers Nanocomposites Mechanical properties Creep behavior Resistivity

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Effects of excitation frequency on detection accuracy of orthogonal wavelet decomposition for structural health monitoring

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Earthquake Engineering and Engineering Vibration 2004年第1期3卷 101-106页

作者： Raul j.alonso Mohammad Noori Soheil Saadat Arata MasudaDepartment of Mechanical and System Engineering Kyoto Institute of Technology Matsugasaki Sakyo-ku Mechanical Engineering & Eleetro Optical Systems-MS 368 1362 Brass Mill Road Department of Mechanical & Aerospace Engineering North Carolina State University

Accurate estimation of stiffness loss is a challenging problem in structural health *** this studyorthogonal wavelet decomposition is used for identifying the stiffness loss in a single degree of freedom *** effects of excitation frequency on accuracy of damage detection is *** show that pseudo-aliaseffects caused by the orthogonal wavelet decomposition(OWD),affect damage *** is demonstrated that theproposed approach is sunable for damage detection when the excitation frequency is relatively *** study shows how apriori knowledge about the signal and ability to control the sampling frequency can enhance damage detectability.

关键词： wavelet analysis damage detection structural health monitoring

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Mass Production of Cost Effective Systems Based on High Concentration

Mass Production of Cost Effective Systems Based on High Conc...

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第十五届国际光伏科学与工程大会

作者： V.Díaz j.Llvarez j.alonso ISOFOTON ISOFOTON ISOFOTON

＜正＞ ISOFOTON S.A., the Spanish PV manufacturer company, is interested in the exploitation of concentrating photovoltaic. It is actively involved in the industrialization of High Concentration PV （HCPV） at really competitive price （below 2,5€/Wpk for installed systems） when mass production issues are considered. This paper describes very briefly main issues of the high concentration strategy, efforts and considerations for a market penetration. A view of the PV market status is also analyzed taking into account some of the projections for new concepts carried out by authorized institutions.

关键词： Concentrators PV-systems Ⅲ-V Solar Cell

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High-speed silicon photonic electro-optic Kerr modulation

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Photonics Research 2024年第1期12卷 51-60页

作者： jONATHAN PELTIER WEIWEI ZHANG LEOPOLD VIROT CHRISTIAN LAFFORGUE LUCAS DENIEL DELPHINE MARRIS-MORINI GUY AUBIN FARAH AMAR DENH TRAN XINGZHAO YAN CALLUM G.LITTLEjOHNS CARLOS alonso-RAMOS KE LI DAVID j.THOMSON GRAHAM REED LAURENT VIVIEN University Paris-Saclay CNRSCentre for Nanoscience and Nanotechnology(C2N)Palaiseau 91120France University Grenoble Alpes CEALETIGrenoble 38000France Optoelectronics Research Centre Zepler Institute for Photonics and NanoelectronicsFaculty of Engineering and Physical SciencesUniversity of SouthamptonSouthampton SO171BJUK

Silicon-based electro-optic modulators contribute to easing the integration of high-speed and low-power consumption circuits for classical optical communications and data *** the plasma dispersion modulation,an alternative solution in silicon is to exploit the DC Kerr effect,which generates an equivalent linear electro-optical effect enabled by applying a large DC electric *** some theoretical and experimental studies have shown its existence in silicon,limited contributions relative to plasma dispersion have been achieved in high-speed modulation so *** paper presents high-speed optical modulation based on the DC Kerr effect in silicon PIN *** contributions of both plasma dispersion and Kerr effects have been analyzed in different waveguide configurations,and we demonstrated that the Kerr induced modulation is dominant when a high external DC electric field is applied in PIN ***-speed optical modulation response is analyzed,and eye diagrams up to 80 Gbit/s in NRZ format are obtained under a *** of 30 *** work paves the way to exploit the Kerr effect to generate high-speed Pockels-like optical modulation.

关键词： waveguide dispersion effect

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Bulk lateral shearing interferometry for spatiotemporal study of time-varying ultrashort optical vortices

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Photonics Research 2022年第4期10卷 922-931页

作者： Miguel Lopez-Ripa Inigo j.Sola Benjamin alonso Grupo de Aplicaciones del Laser y Fotonica(ALF) Departamento de Fisica AplicadaUniversidad de Salamanca37008 SalamancaSpain

The spatiotemporal measurement of ultrashort laser beams usually involves techniques with complex set-ups or limited by instabilities that are unable to accurately retrieve the frequency-resolved wavefront. Here, we solve these drawbacks by implementing a simple, compact, and ultra-stable spatiotemporal characterization technique based on bulk lateral shearing spectral interferometry using a birefringent uniaxial crystal. We apply it to retrieve complex spatiotemporal structures by characterizing ultrafast optical vortices with constant and time-varying orbital angular momentum. This technique can operate in all the transparency range of the anisotropic elements,enabling the characterization in different spectral ranges like infrared, visible, or ultraviolet.

关键词： ultrashort shearing interferometry

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Analysis Of Urban Planning Instruments in Comala,Colima,Mexico(1997-2009)from a Gender Perspective-A Secondary Publication

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journal of Architectural Research and Development 2024年第1期8卷 93-101页

作者： E.j.García Espíritu P.Chung alonso I.BarajasÁvalos M.S.R.Covarrubias Ruesga M.P.Ramírez Rivera National Technological Institute of Mexico Mayor Benito Juárez CP 03330Mexico CityMexico

This work is carried out based on the analysis of urban planning instruments,taking the gender perspective as a *** arises from the inclusion of women in the participation of urban development,through an analysis of the gender gaps that have marked the history of women,the inequalities serve as a basis for carrying out this *** highlights the challenges we face today as a society in the process of building citizen participation,where we must all be recognized and have equal opportunities within the territory in which we *** article analyzes the extent to which the Municipal Urban Development Programs of the Mexican municipality of Comala,Colima,Mexico,consider the recommendations on gender and urbanism,established since the 1990s by international entities and applied transversally to urban planning *** differences are found between women and men in terms of empowerment and participation in urban territorial planning instruments,mainly in the oldest instrument(1997).Significant progress is observed in the most recent document and is currently in force in the municipality of Comala(2009).

关键词： Planning instruments Gender perspective Urban planning

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Bifunctional oxygen electrode cobalt–nickel sulfides catalysts originated from intercalated LDH precursors

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journal of Energy Chemistry 2022年第11期31卷 376-386,I0010页

作者： Xiaofei Gong Haihong Zhong Luis Alberto Estudillo-Wong Nicolas alonso-Vante Yongjun Feng Dianqing Li State Key Laboratory of Chemical Resource Engineering Beijing Engineering Center for Hierarchical CatalystsCollege of ChemistryBeijing University of Chemical TechnologyBeijing 100029China Departamento de Sociedad y Política Ambiental CIIEMADInstituto Politécnico NacionalCalle 30 de junio de 1520Alcaldía GAMC.P.07340 CDMXMexico IC2MP UMR-CNRS 7285University of PoitiersF-86073 Poitiers CedexFrance

Bimetallic cobalt-nickel sulfide nanoparticles anchored on S-,N-codoped holey carbon nanosheets(CoNiS-T@NCFs)with a hydrangea-like morphology,were synthesized via a confinement synthesis route,in which an intercalated LDH precursor was subjected to the interlayer-confined carbonization and host-layer *** phase transformation and structure evolution(e.g.,atom site occupancy,crystallite size,and cell volume)of the CoNi-S-T@NCFs electrocatalysts,as a function of sulfurization temperatures,were confirmed by X-ray diffraction and Rietveld *** sulfur vacancies effectively enhance the electrocatalytic activity,while the synergistic effect of(Co,Ni)7 S8 alloy and S,N-codoped carbon matrix facilitates the electron transfer and accelerates reaction kinetics,making CoNi-S-900@NCFs an efficient and stable bifunctional electrocatalyst for oxygen reduction reaction(ORR).The rich highvalence Co(Ⅲ)and Ni(Ⅲ)of CoNi-S-900@NCFs facilitates the in-situ transformation of the metal(oxy)hydroxides intermediates with high catalytic activity for oxygen evolution reaction(OER).Thus,with a bifunctional parameter,ΔE,of 0.75 V(E_(j=10,OER)-E_(1/2,ORR)),this electrocatalyst slightly outperforms the state-of-the-art commercial Pt/C+RuO_(2)/C catalyst(ΔE=0.76 V)in alkaline *** work demonstrates the influence that the sulfurization temperature has on the relationship between the structure and electrocatalytic performance of bimetallic sulfides prepared by the synthesis strategy using the intercalated LDH *** strategy can be extended to prepare other chalcogenides with binary or ternary transition metals.

关键词： Bimetallic sulfides Confinement synthesis LDHs ORR OER

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Modelling fuel loads of understorey vegetation and forest floor components in pine stands in NW Spain

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Forest Ecosystems 2022年第6期9卷 775-789页

作者： jose A.Vega Stefano Arellano-Perez juan Gabriel Alvarez-Gonzalez Cristina Fernandez Enrique jimenez Pedro Cuinas jose María Fernandez-alonso Daniel j.Vega-Nieva Fernando Castedo-Dorado Cecilia alonso-Rego Teresa Fontúrbel Ana Daría Ruiz-Gonzalez Centro de Investigacion Forestal de Lourizan PO Box 12736080PontevedraSpain Unidad de Gestion Ambiental y Forestal Sostenible(UXAFORES) Departamento de Ingeniería AgroforestalEscuela Politecnica Superior de IngenieríaUniversidad de Santiago de CompostelaCampus Universitario s/n27002LugoSpain Facultad de Ciencias Forestales Universidad Juarez del Estado de DurangoRío Papaloapan y Blvd.Durango s/nCol.Valle del Sur34120DurangoMexico Departamento de Ingeniería y Ciencias Agrarias Universidad de LeonCampus de Ponferrada24401PonferradaSpain

In this study,310 destructively sampled plots were used to develop two equation systems for the three main pine species in NW Spain(***;*** and ***):one for estimating loads of understorey fuel components by size and condition(live and dead)and another one for forest floor *** systems of equations were simultaneously fitted for estimating fuel loads using overstorey,understorey and forest floor variables as *** systems of equations included both the effect of pine species and the effect of understorey compositions dominated by ferns-brambles or by woody species,due to their obvious structural and physiological *** general,the goodness-of-fit statistics indicated that the estimates were reasonably robust and accurate for all of the fuel *** best results were obtained for total understorey vegetation,total forest floor and raw humus fuel loads,with more than 76%of the observed variability explained,whereas the poorest results were obtained for coarse fuel loads of understory vegetation with a 53%of observed variability *** reduce the overall costs associated with the field inventories necessary for operational use of the models,the additive systems were fitted again using only overstorey variables as potential *** relationships for fine(<6 mm)and total understorey vegetation and total forest floor fuel loads were obtained,indicating the complexity of the forest overstorey-understorey and overstorey-forest floor ***,these models explained around 52%of the observed ***,equations estimating the total understorey vegetation and the total forest floor fuel loads based only on canopy cover were *** models explained only 26%-32%of the observed variability;however,their main advantage is that although understorey vegetation in forested landscapes is largely invisible to remote sensing,canopy cover can be estimated with moderate accuracy,allowin

关键词： Area-based approach Additive equation systems Live and dead fine fuel Pinus pinaster Pinus radiata Pinus sylvestris

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Machine learning insights concerning inflammatory and liver-related risk comorbidities in non-communicable and viral diseases

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World journal of Gastroenterology 2022年第44期28卷 6230-6248页

作者： j Alfredo Martínez Marta alonso-Bernáldez Diego Martínez-Urbistondo juan A Vargas-Nuñez Ana Ramírezde Molina Alberto Dávalos Omar Ramos-Lopez Precision Nutrition and Cardiometabolic Health Madrid Institute of Advanced Studies-Food InstituteMadrid 28049Spain Department of Internal Medicine Hospital Universitario HM SanchinarroMadrid 28050Spain Servicio de Medicina Interna Hospital Universitario Puerta de Hierro MajadahondaMadrid 28222MajadahondaSpain Molecular Oncology and Nutritional Genomics of Cancer Madrid Institute of Advanced Studies-Food InstituteMadrid 28049Spain Laboratory of Epigenetics of Lipid Metabolism Madrid Institute of Advanced Studies-Food InstituteMadrid 28049Spain Medicine and Psychology School Autonomous University of Baja CaliforniaTijuana 22390Baja CaliforniaMexico

The liver is a key organ involved in a wide range of functions,whose damage can lead to chronic liver disease(CLD).CLD accounts for more than two million deaths worldwide,becoming a social and economic burden for most *** the different factors that can cause CLD,alcohol abuse,viruses,drug treatments,and unhealthy dietary patterns top the *** conditions prompt and perpetuate an inflammatory environment and oxidative stress imbalance that favor the development of hepatic *** stages of fibrosis can eventually lead to cirrhosis or hepatocellular carcinoma(HCC).Despite the advances achieved in this field,new approaches are needed for the prevention,diagnosis,treatment,and prognosis of *** this context,the scientific community is using machine learning(ML)algorithms to integrate and process vast amounts of data with unprecedented *** techniques allow the integration of anthropometric,genetic,clinical,biochemical,dietary,lifestyle and omics data,giving new insights to tackle CLD and bringing personalized medicine a step *** review summarizes the investigations where ML techniques have been applied to study new approaches that could be used in inflammatoryrelated,hepatitis viruses-induced,and coronavirus disease 2019-induced liver damage and enlighten the factors involved in CLD development.

关键词： Machine learning Liver inflammation Liver disease Viral diseases Comorbidity

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MODELING HEADCUT DEVELOPMENT AND MIGRATION IN UPLAND CONCENTRATED FLOWS

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International journal of Sediment Research 2005年第4期20卷 281-294页

作者： Sean j. BENNETT Carlos V. alonso Department of Geography University at Buffalo Buffalo NY 14261-0055 USA USDA-ARS National Sedimentation Laboratory P.O. Box 1157 Oxford MS 38655

On hillslopes and agricultural fields, discrete areas of intense, localized soil erosion commonly take place in the form of migrating headcuts. These erosional features significantly increase soil loss and landscape degradation, yet the unsteady, transient, and migratory habits of headcuts complicate their phenomenological and erosional characterization. Here a unique experimental facility was constructed to examine actively migrating headcuts typical of upland concentrated flows. Essential components of the facility include a deep soil cavity with external drainage, rainfall simulator, capacity for overland flow, and a video recording technique for data collection. Results from these experiments show that: (1) after a short period of adjustment, headcut migration attained a steady-state condition, where the rate of migration, scour hole geometry, and sediment discharge remain constant with time; (2) boundary conditions of higher rates of overland flow, steeper bed slopes, and larger initial headcut heights produced systematically larger scour holes with higher rates of soil erosion; and (3) during migration, the turbulent flow structure within the scour hole remained unchanged, consisting of an overfall nappe at the brink transitioning into a reattached wall jet with two recirculation eddies within the plunge pool. The systematic behavior of headcut development and migration enabled the application of modified jet impingement theory to predict with good success the characteristics of the impinging jet, the depth of maximum scour, the rate of headcut migration, and the rate of sediment erosion. These laboratory data and the analytical formulation can be used in conjunction with soil erosion prediction technology to improve the management of agricultural areas impacted by headcut development and ephemeral gully erosion.

关键词： Soil erosion Headcuts Rills Gullies jet impingement

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