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Anterior and posterior capsule densitometry levels after femtosecond laser-assisted cataract surgery

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International Journal of Ophthalmology(English edition) 2018年第4期11卷 623-628页

作者： Txomin Alberdi Javier Mendicute Lucia Bascaran Olatz Barandika Javier Ruiz-Ederra Department of Ophthalmology Donostla University HospitalDonostia-San Sebastian 20014Spain Biodonostia Health Research Institute Donostia-San Sebastian 20014Spain

AIM： To analyze and compare five different variables over one year follow-up（1 wk, 1, 3, 6 and 12 mo）： anterior capsule（AC）, and posterior capsule（PC） area densitometry values, AC and PC linear densitometry values, and AC opening area reduction ratio after femtosecond laserassisted cataract surgery. METHODS： This was a prospective comparative study. Seventy-one patients underwent femtosecond laser-assisted cataract surgery on single eye between June 2014 and December 2015. A 5.0 mm diameter laser assisted anterior capsulotomy was performed on all eyes. In every postsurgery evaluation, AC opacificaction（ACO） and PC opacification（PCO） density levels were provided by Oculus Pentacam·HR using area and linear densitometry methods. Digital images were captured with a slit-lamp Topcon photographic camera and IMAGEnet· 5 software. The AC opening area on the digital images was measured using the Sketchandcalc area calculator and converted to reduction ratio ***： Using Pearson correlation coefficient（PCC）, we found no correlation（r=-0.091, P=0.46） in the twelfth month assessment between the evolution of ACO area densitometry values and PCO area densitometry values considered as independent variables. We found no correlation, using PCC（r=-0.096, P=0.43） between the evolution of ACO linear densitometry values and PCO linear densitometry values, in the twelfth month visit, working both as independent variables. AC linear densitometry levels and AC area densitometry levels continued to grow strongly from sixth to twelfth months. Analysis of the values of AC opening area reduction ratio（1 wk, 1, 3, 6, 12 mo） revealed statistically significant differences between the values of successive examinations but the magnitude of the change decreased. In the final period of monitoring between six and twelve months the magnitude of change was ***： Our results show strong increases of Scheimpflug ACO densitometry values from the sixth to the twelfth month while capsulorh

关键词： anterior capsule opacification area densitometry femtosecond laser-assisted cataract surgery linear densitometry Pentacam?HR Scheimpflug posterior capsule pacification

Electro-tribological properties of diamond like carbon coatings

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Friction 2020年第2期8卷 451-461页

作者： Iñigo BRACERAS Iñigo IBÁNEZ santiago DOMINGUEZ-MEISTER Xabier VELASCO Marta BRIZUELA Iñaki GARMENDIA Tecnalia Research&Innovation Mikeletegi Pasealekua 2Donostia-San Sebastian 20009Spain Mechanical Engineering Department University of the Basque Country UPV/EHUPlaza de Europa1Donostia-San Sebastian 20018Spain

Diamond like carbon(DLC)coatings typically present good self-lubricating tribological properties that could be of interest in sliding dielectric contacts in multiple electrical *** this work electro-tribological studies have been performed on several DLC coatings against aluminum in different humidity conditions,in which the coefficients of friction(CoFs)and electrical contact resistance(ECR)were continuously *** show that CoF and ECR data can be linked to the properties of the coatings(thickness,finishing,microstructure,residual stresses,and wettability)and the degradation modes of their tribological and electrical ***,electro-tribological data can provide valuable information about the performance of dielectric coatings,the reasons behind it,and assist in the development of the *** also shows potential for on-line monitoring of coated parts in operation.

关键词： DLC electro-tribology ECR-electrical contact resistance coefficient of friction

Numerical Approximation of an Axisymmetric Elastoacoustic Eigenvalue Problem

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Communications in Computational Physics 2023年第10期34卷 1420-1438页

作者： J.Querales P.Venegas GIMNAP Departamento de MatematicaUniversidad del Bio-BioConcepcionChile Departamento de Ciencias Exactas Facultad de IngenieriaArquitectura y DisenoUniversidad San SebastianConcepcionChile

This paper deals with the numerical approximation of a pressure/displacement formulation of the elastoacoustic vibration problem in the axisymmetric *** propose and analyze a discretization based on Lagrangian finite elements in the fluid and solid *** show that the scheme provides a correct approximation of the spectrum and prove quasi-optimal error *** report numerical results to validate the proposed methodology for elastoacoustic vibrations.

关键词： Axisymmetric problem fluid-structure interaction spectral problem finite element method

Severe aspiration pneumonia in the elderly

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Journal of Intensive Medicine 2024年第3期4卷 307-317页

作者： sebastian Ocrospoma Marcos I.Restrepo Division of Pulmonary Diseases&Critical Care Medicine University of Texas Health San AntonioSan AntonioTXUSA Section of Pulmonary&Critical Care Medicine South Texas Veterans Health Care SystemSan AntonioTXUSA

The global population is aging at an unprecedented rate,resulting in a growing and vulnerable elderly population in need of efficient comprehensive healthcare services that include long-term care and skilled nursing *** this context,severe aspiration pneumonia,a condition that carries substantial morbidity,mortality,and financial burden,especially among elderly patients requiring admission to the intensive care unit,has attracted greater *** pneumonia is defined as a pulmonary infection related to aspiration or dysphagia in *** episodes of coughing on food or liquid intake,a history of relevant underlying conditions,abnormalities on videofluoroscopy or water swallowing,and gravity-dependent shadow distribution on chest imaging are among the clues that suggest *** with aspiration pneumonia tend to be elderly,frail,and suffering from more comorbidities than those without this ***,we comprehensively address the epidemiology,clinical characteristics,diagnosis,treatment,prevention,and prognosis of severe aspiration community-acquired pneumonia in the elderly to optimize care of this high-risk demographic,enhance outcomes,and minimize the healthcare costs associated with this *** preventive measures and effective management strategies is vital in ensuring the well-being of our aging population.

关键词： Aspiration pneumonia Aged Critical illness Swallowing disorders Frailty Antibacterial agents

On the simulation of shared autonomous micro-mobility

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Communications in Transportation Research 2022年第1期2卷 104-115页

作者： Naroa Coretti sanchez Inigo Martinez Luis Alonso Pastor Kent Larson MIT Media Lab CambridgeMAUSA University of Navarra San SebastianSpain

Fast urbanization and climate change require innovative systems for an efficient movement of people and goods in *** trends towards vehicle-sharing,autonomous vehicles,and the use of micro-mobility systems gain strength,the intersection of these fields appears as an area of great *** could potentially bring the convenience of on-demand mobility into already prevalent shared micro-mobility systems(SMMS),increasing their efficiency and incentivizing more people to use active mobility *** novelty of introducing autonomous driving technology into SMMS and their inherent complexity requires tools to assess and quantify the potential impact of autonomy on fleet performance and user *** paper presents an ad-hoc agentbased simulator for the assessment of the fleet behavior of autonomous SMMS in realistic scenarios,including a rebalancing system based on demand *** also allows comparing its performance to station-based and dockless *** proposed simulation framework is highly configurable and flexible and works with high resolution and precision geospatial *** results of studies carried out with this simulation tool could provide valuable insights for many stakeholders,including vehicle design engineers,fleet operators,city planners,and governments.

关键词： Future mobility Autonomous vehicles Micro-mobility Agent-basedsimulation Multi-agentsystems

On the performance of shared autonomous bicycles:A simulation study

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Communications in Transportation Research 2022年第1期2卷 116-151页

作者： Naroa Coretti sanchez Inigo Martinez Luis Alonso Pastor Kent Larson MIT Media Lab CambridgeMAUSA University of Navarra San SebastianSpain

As society faces global challenges such as population growth and climate change,rethinking cities is now more imperative than *** design of cities can not be abstracted from the design of their mobility ***,efficient solutions must be found to transport people and goods throughout the city efficiently and *** autonomous bicycle-sharing system would combine the most relevant benefits of vehicle-sharing,autonomy,and micro-mobility,increasing the efficiency and convenience of bicycle-sharing systems and incentivizing more people to bike and enjoy their cities in an environmentally friendly *** to the novelty of introducing autonomous driving technology into bicycle-sharing systems and their inherent complexity,there is a need to quantify the potential impact of autonomy on fleet performance and user *** paper presents the results of an agent-based simulation that provides an in-depth understanding of the fleet behavior of autonomous bicycle-sharing systems in realistic scenarios,including a rebalancing system based on demand *** addition,this work describes the impact of different parameters on system efficiency and service ***,it quantifies the extent to which an autonomous system would outperform current station-based and dockless bicycle-sharing *** obtained results show that with a fleet size three and a half times smaller than a station-based system and eight times smaller than a dockless system,an autonomous system can improve overall performance and user experience even with no rebalancing.

关键词： Future mobility Bicycle-sharing systems Autonomous vehicles Micro-mobility Agent-based simulation Multi-agent systems

Design of active and stable catalysts by embedding nitrogen-doped carbon oxygen reduction reaction CoxOy nanoparticles into

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Nano Research 2017年第1期10卷 97-107页

作者： Fan Yang Mikel Abadia Chaoqiu Chen Weike Wang Le Li Lianbing Zhang Celia Rogero Andrey Chuvilin Mato Knez CIC nanoGUNE Consofider Tolosa Hifibidea 76 20018 Donostia-San Sebastian Spain Centro de Fisica de Materials CFM/MPC (CSIC-UPV/EHU) Paseo Manuel de Lardizabal 5 20018 Donostia-San Sebastian Spain School of Life Sciences Northwestern Polytechnical University Xi'an 710072 China Donostia International Physics Center (DIPC) Paseo Manuel de Lardizabal 4 20018 Donostia-San Sebastian Spain IKERBASQUE Basque Foundation for Science Maria Diaz de Haro 3 48013 Bilbao Spain

The oxygen reduction reaction （ORR） is essential in research pertaining to life science and energy. In applications, platinum-based catalysts give ideal reactivity, but, in practice, are often subject to high costs and poor stability. Some costefficient transition metal oxides have exhibited excellent ORR reactivity, but the stability and durability of such alternative catalyst materials pose serious challenges. Here, we present a facile method to fabricate uniform CoxOy nanoparticles and embed them into N-doped carbon, which results in a composite of extraordinary stability and durability, while maintaining its high reactivity. The half-wave potential shows a negative shift of only 21 mV after 10,000 cycles, only one third of that observed for Pt/C （63 mV）. Furthermore, after 100,000 s testing at a constant potential, the current decreases by only 17%, significantly less than for Pt/C （35%）. The exceptional stability and durability results from the system architecture, which comprises a thin carbon shell that prevents agglomeration of the CoxOy nanoparticles and their detaching from the substrate.

关键词： atomic layer deposition cobalt oxide polydopamine oxygen reduction reaction

Optimal thermoelectric figure of merit of Si/Ge core-shell nanowires

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Nano Research 2015年第8期8卷 2611-2619页

作者： Kaike Yang Andres Cantarero Angel Rubio Roberto D'Agosta Nano-Bio Spectroscopy Group and ETSF Scientific Development Center Departamento de Fisica de Materiales Universidad del Pais Vasco UPV/EHU San Sebastian 20018 Spain Instituto de Ciencia de Materiales Universidad de Valencia Valencia 46071 Spain Ikerbasque Basque foundation for Science Bilbao 48013 Spain

We investigate the thermoelectric energy conversion efficiency of Si and Ge nanowires, and in particular, that of Si/Ge core-shell nanowires. We show how the presence of a thin Ge shell on a Si core nanowire increases the overall figure of merit. We find the optimal thickness of the Ge shell to provide the largest figure of merit for the devices. We also consider Ge core/Si shell nanowires, and show that an optimal thickness of the Si shell does not exist, since the figure of merit is a monotonically decreasing function of the radius of the nanowire. Finally, we verify the empirical law relating the electron energy gap to the optimal working temperature that maximizes the efficiency of the device.

关键词： thermoelectric properties Seebeck coefficient silicon and germanium core-shell nanowires

Porosity,cracks,and mechanical properties of additively manufactured tooling alloys:a review

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Advances in Manufacturing 2022年第2期10卷 175-204页

作者： Prveen Bidare Amaia Jimenez Hany Hassanin Khamis Essa School of Mechanical Engineering University of BirminghamBirminghamUK TECNUN Escuela de Ingenieria Universidad de NavarraManuel de Lardizabal 15San Sebastian20018Spain School of Engineering Technologyand DesignCanterbury Christ Church UniversityCanterbury CT11QUUK

Additive manufacturing(AM)technologies are currently employed for the manufacturing of completely functional parts and have gained the attention of hightechnology industries such as the aerospace,automotive,and biomedical *** is mainly due to their advantages in terms of low material waste and high productivity,particularly owing to the flexibility in the geometries that can be *** the tooling industry,specifically the manufacturing of dies and molds,AM technologies enable the generation of complex shapes,internal cooling channels,the repair of damaged dies and molds,and an improved performance of dies and molds employing ***,a reviewof AM processes and materials applied in the tooling industry for the generation of dies and molds is *** technologies used for tooling applications and the characteristics of the materials employed in this industry are first *** addition,the most relevant state-of-the-art approaches are analyzed with respect to the process parameters and microstructural and mechanical properties in the processing of high-performance tooling materials used in AM ***,studies on the AM of ferrous(maraging steels and H13 steel alloy)and non-ferrous(stellite alloys and WC alloys)tooling alloys are also analyzed.

关键词： Additive manufacturing(AM) Tooling alloys Super alloys Hybrid manufacturing Post processing