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Injectable Platelet-Rich Fibrin in Contact with Bone Substitutes, Porous Zirconia, or Laser-Textured Implant Surfaces: A Detailed Morphological Analysis

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Biomedical Materials and Devices 2024年第1期2卷 415-426页

作者： Oliveira, Miguel Noronha Varela, Hugo Almeida Nascimento, Rubens M. Sahoo, Narayan Carvalho, Oscar Henriques, Bruno Souza, Júlio C. M. Ceramic and Composite Materials Research Group (CERMAT) Department of Mechanical Engineering (EMC) Federal University of Santa Catarina (UFSC) Post-graduate Program in Materials Science and Engineering Federal University of Rio Grande Norte (UFRN) Center for MicroElectroMechanical Systems (CMEMS-UMINHO) Universidade do Minho LABBELS - Associate Laboratory University of Minho University Institute of Health Sciences (IUCS) CESPU

The aim of the present study was to perform a detailed morphological analysis of an injectable platelet rich fibrin after combination with two different particulate hydroxyapatite-based granules, a porous zirconia block, and laser-textured zirconia or titanium surfaces. Blood samples were harvested from three participants to prepare the flowable injectable PRF in contact or not with particulate hydroxyapatite (Hap), bone mineral granules (DBBM), porous zirconia blocks, laser-textured titanium or zirconia surfaces. Optical and scanning electron microscopy (SEM) were used to evaluate the fibrin network density, fibrin fibers’ diameter, blood cells, and the interaction of PRF with the biomaterials. Histomorphometry of the flowable PRF was also performed using the hematoxylin–eosin staining protocol. Specimens were independently evaluated by two blinded and well-trained researchers in histomorphometry and microscopy. Particulate Hap and DBBM shown different morphological aspects by SEM analyses since DBBM revealed macro- and micro-scale pores while Hap revealed a dense structure. Hydroxyapatite and DBBM granules were entirely embedded by the fibrin-network in the presence of leukocytes and blood platelets. The zirconia porous structured was filled with PRF and its components. Also, the laser-structured zirconia or implant surfaces were entirely coated with the PRF fibrin network embedding leukocytes and blood platelets. Laser-textured titanium surfaces revealed macro- and micro-scale irregularities that increase the surface area and retention of the injectable PRF. Histomorphometric analyses revealed complementary details on the distribution of lymphocytes, red blood cells, and fibrin associated with platelet aggregation. The flowing and viscosity of an injectable platelet rich fibrin provided an agglomeration of synthetic or xenogeneic particulate bone substitutes and the coating of porous zirconia and textured implant surfaces as inspected by scanning electron microsc

关键词： Bone healing Bone substitutes Histology Morphology Platelet-rich fibrin

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A Game-Theoretic Approach for Pricing and Determining Virtual Reality Investment and Cybersecurity Level in a Dual-Channel Supply Chain 19th

A Game-Theoretic Approach for Pricing and Determining Virtua...

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19th International Conference on the Economics of Grids, Clouds, systems, and Services, GECON 2022

作者： Alaei, Amir Mohammad Rasti-Barzoki, Morteza Altmann, Jörn Egger, Bernhard Department of Industrial and Systems Engineering Isfahan University of Technology Isfahan84156-83111 Iran Institute of Engineering Research College of Engineering Seoul National University Seoul08826 Korea Republic of Technology Management Economics and Policy Program College of Engineering Seoul National University Seoul08826 Korea Republic of Department of Computer Science and Engineering College of Engineering Seoul National University Seoul08826 Korea Republic of

ISBN: (纸本)9783031293146

Virtual reality has become a new option to inform the customers about product before purchasing. However, providing virtual reality may create new challenges. For instance, consumers may obtain essential information about products by using virtual reality option, but eventually they buy their products from the offline channel. This phenomenon is called webrooming. Another challenge is cyber-attacks. E-tailers and their consumers face risks from cyber-attacks. Thus, e-tailers are investing to improve cybersecurity. We consider a dual-channel supply chain consisting of an offline retailer and an e-tailer who purchase the same product from a manufacturer at the same wholesale price. The e-tailer offers a partial refund policy in order to attract the customers. Also, to reduce consumer valuation uncertainty, the e-tailer faces the decision on whether to introduce virtual reality. We analyze three scenarios. Firstly, the e-tailer does not offer virtual reality. Secondly, the e-tailer offers virtual reality, but he does not invest on cybersecurity. Thirdly, the e-tailer offers virtual reality and invests on cybersecurity. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Game theory

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A multi-objective model for sustainable reverse logistics design for end-of-life tires under a regulatory framework: A Chilean case study

A multi-objective model for sustainable reverse logistics de...

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2023 International Conference on Electrical, Computer, Communications and Mechatronics engineering, ICECCME 2023

作者： Rodríguez, Ignacio Castañeda Pérez, Andrea Espinoza Boudaoud, Hakim University of Santiago of Chile Department of Industrial Engineering Santiago Chile University of Santiago of Chile Program for the Development of Sustainable Production Systems Department of Industrial Engineering Santiago Chile Université de Lorraine Équipe de Recherche sur les Processus Innovatifs Erpi Nancy France

ISBN: (纸本)9798350322972

Growing concern about environmental pollution has led to a tightening of legislation worldwide. An example is the Extended Producer Responsibility (EPR) principle, which holds producers responsible for the life-cycle management of their products. In this context, the management of End-of-life tires (ELT) presents a significant challenge due to the pollution they cause by being disposed of in landfills without prior treatment. Thus, there is an opportunity to implement ELT recovery technologies that explore new sustainable alternatives. This work presents a multi-period, multi-product, multi-objective optimization model that supports decision-making for the design of a sustainable reverse logistics network. A case study is presented to show the usefulness of this model, considering the implementation of pyrolysis plants for the treatment of ELT in Chile under the regulatory framework of the EPR Law. The results show that even though the objectives are opposed, the regulatory framework of the EPR Law allows for mitigating the conflict between economic, environmental, and social decisions by establishing collection goals. The epsilon-constraint method can find economically profitable solutions, obtaining gaps of at least 8.5% and at most 19.3%. However, this will depend on the changes and sensitivity of the uncertain parameters of the model. Conclusions call for reinforcement of regulatory policies involving reverse logistics and ELT management. Future work considers the implementation of robust optimization to deal better with uncertainty. © 2023 IEEE.

关键词： Sustainable development

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Effect of an antiferromagnetic order on tailoring Dzyaloshinskii- Moriya interaction in Pt/Co/IrMn trilayer

Effect of an antiferromagnetic order on tailoring Dzyaloshin...

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2023 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2023

作者： Chen, Sheng-Huai Yang, Chao-Yao Lai, Chih-Huang National Tsing Hua University Department of Materials Science and Engineering Hsinchu300044 Taiwan National Yang Ming Chiao Tung University Department of Materials Science and Engineering Hsinchu300093 Taiwan National Yang Ming Chiao Tung University Undergraduate Degree Program of Systems Engineering and Technology Hsinchu300093 Taiwan

ISBN: (纸本)9798350338362

Antiferromagnet (AFM) has currently participated in the spin-orbit torque (SOT) magnetoresistive random access memory (MRAM) technolopgy due to its great potential to be applied to the field-free SOT switching and promote the thermal stability of MRAM. However, effect of the introduction of AFM into the basic structure of SOT-MRAM composed of a heavy metal/ferromagnet (FM) bilayer was still not comprehensively understood. This work reports the effect of how an antiferromagnetic (AFM) order modifies the strength of Dzyaloshinskii-Moriya interaction (DMI) in a heavy metal (Pt)/FM (Co)/AFM (IrMn) trilayer, studied by SOT switching and loop-shift method. Increasing the AFM order reflected on exchange bias (Hex) through increasing the thickness of IrMn appears to significantly reduce the DMI strength of the trilayer, which leads to the reduction of the external field for yielding a complete SOT switching. The reduced DMI strength may ascribe to the Hex-hosted uni-directional anisotropy suppressing the neighboring spin canting in the FM layer. This stabilization for the magnetic moments via the Hex-hosted uni-directional anisotropy also improved the stability of SOT switching on the random read/write characterization, in which the strong AFM order would promote the memristivity for neuromorphic application and the weak AFM order would give rise to the stochasticity for the purpose of physically unclonable functionality. This work demonstrates the significance of an intrinsic tuning over the AFM order would serve as a switch to turn the SOT device into a stochastic/memristive cell to bridge probabilistic and neuromorphic computing. © 2023 IEEE.

关键词： Stochastic systems

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Revisiting a hidden order at an ferromagnet/antiferromagnet interface and its switching dynamics

Revisiting a hidden order at an ferromagnet/antiferromagnet ...

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2023 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2023

作者： Yang, Chao-Yao Chen, Sheng-Huai Lai, Chih-Huang National Yang Ming Chiao Tung University Department of Materials Science and Engineering Hsinchu300093 Taiwan National Yang Ming Chiao Tung University Undergraduate Degree Program of Systems Engineering and Technology Hsinchu300093 Taiwan National Tsing Hua University Department of Materials Science and Engineering Hsinchu300044 Taiwan

ISBN: (纸本)9798350338362

Study on the exchange bias (Hex) switching in a ferromagnet (FM)/antiferromagnet (AFM) bilayer driven by the spin-orbit torque (SOT) has been an explicit research field and current focus has been devoted to determining the approaches to drive the Hex switching along with specific SOT applications. Hex is magnetically dominant but only reveals the partial facet of IrMn, which is only responsible for the ferromagnetic component at the interface of AFM. Therefore, the complete facet of AFM and its interaction with SOT at an FM/AFM interface is still not fully uncovered. This research reports an SOT-driven hidden order transition behind Hex in a heavy metal (Pt)/FM (Co)/AFM (IrMn) trilayer along with the issue of switching activity at Co/IrMn interface. The exchange coupling across Co/IrMn interface allows a long-range spin order in the form of an exchange-spring configuration, yielding two kinds of order in IrMn: a canting-induced ferromagnetic order for hosting Hex and a hidden Néel order for preserving the antiferromagnetic nature. The former appears to be strongly coupled to the magnetization state of Co during the SOT switching, so it can be reversibly switched with Co on the Hex switching. On the contrary, the hidden Néel order transition re-orientated to the current direction appears to be irreversibly driven by SOT and independent on the current polarity, which can reflect on the magnetoresistance (MR) measurement and X-ray magnetic linear dichroism (XMLD) spectroscopy. Finally, a micromagnetic simulation reveals the dynamic IrMn spins are mainly based on a canting type interface instead of an uncompensated type via an exchange-spring coupling with Co. © 2023 IEEE.

关键词： Binary alloys

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Single Inductor Dual Buck Inverter Classical and Predictive Linear Voltage Controller Comparison 8

Single Inductor Dual Buck Inverter Classical and Predictive ...

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8th Southern Power Electronics Conference and the 17th Brazilian Power Electronics Conference, SPEC / COBEP 2023

作者： Patarroyo-Gutierrez, Luis David Nakamoto Yamaguti, Nelson Nayoshi Hernández-Gómez, Oscar Mauricio MacEdo Da Silva, Daniel Abreu School of Electronic Engineering Universidad Pedagógica y Tecnológica de Colombia Tunja Boyacá Colombia Federal University of Santa Catarina Dep. of Automation and Systems SC Florianopolis Brazil Electrical Engineering Graduate Program Federal University of Pará Belem Brazil

ISBN: (纸本)9798350321128

This article presents the mathematical model of a 2 KW DBI (Dual Buck Inverter) converter that can be used in renewable energy applications. The inverter operating modes are described with the equations that model their behavior with the activation signals of the MOSFETs. The switching model is built. Simulation results are presented by applying linear control through a PI controller and GPC (Generalized Predictive Controller) hybridized in PID structure;simulation results are recorded in PSIM © verifying the control response due to changes in the load and the input DC voltage level.

关键词： Automatic Voltage Control Control of Power Electronic systems DC-AC Power Converters Dual Buck Inverter Inverter

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Influence of road environmental elements on pedestrian and cyclist road crossing behaviour

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SICE Journal of Control, Measurement, and System Integration 2021年第2期14卷 50-58页

作者： Saito, Yuichi Kochi, Fuma Itoh, Makoto Fushima, Takesato Sugano, Takashi Yamamoto, Yasunori Faculty of Engineering Information and Systems University of Tsukuba Tsukuba Japan Master's Program in Risk and Resilience Engineering University of Tsukuba Tsukuba Japan Mazda Motor Corporation Hiroshima Japan

The pedestrian and cyclist-related accident fatality rate is higher than that of other traffic accidents. One of the pedestrian behaviours that leads to traffic accidents is the act of moving rapidly onto the road from a blind spot without warning. Expert drivers practice hazard-anticipatory driving and will naturally seek to reduce uncertainty by attempting to fit their current driving context into a pre-existing category. Risk management is the process of identifying hazards and assessing and controlling risks to attain safety. The purpose of this study was to evaluate the influence that driving context-altering road environmental elements exert on the road-crossing behaviour of pedestrians and cyclists. Thus, this study attempted to identify covert hazards (obscured pedestrians and cyclists). A logistic regression analysis was employed along with data from the near-miss incident database, in which approximately 140,000 near-crash-relevant events were registered in 2017. By using the logistic regression analysis along with the annotations recorded in the database, we constructed a predictive model to identify covert hazards. The study demonstrated the feasibility of using a set of environmental elements that shape the driving context to construct a predictive model that identifies covert hazards. © 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

关键词： Database systems

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Improved IP lookup technology for trie-based data structures

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Journal of Computer and System Sciences 2023年 133卷 41-55页

作者： Lin, Yen-Heng Hsieh, Sun-Yuan Master Degree Program on Artificial Intelligence National Cheng Kung University Tainan701 Taiwan Department of Computer Science and Information Engineering Institute of Manufacturing Information Systems Institute of Medical Informatics National Cheng Kung University Tainan701 Taiwan Department of Computer Science and Information Engineering National Chi Nan University Nantou Puli Township54561 Taiwan

Many Internet protocol (IP) lookup algorithms have been formulated to improve network performance. This study reviewed and experimentally evaluated technologies for trie-based methods that reduce memory access, memory consumption and IP lookup time. Experiments involving binary tries (for simplicity) were conducted on four real-world data sets, two of which were on IPv4 router tables (855,997 and 876,489 active prefixes) and two of which were on IPv6 router tables (155,310 and 157,579 active prefixes). Technologies designed to reduce time taken (at the expense of memory consumption) worked well for IPv4, and those designed to reduce memory consumption worked well for IPv6. Various combinations of these technologies were applied together in the experiments. © 2022 Elsevier Inc.

关键词： Table lookup

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Generative assistant for digital twin simulations 12

Generative assistant for digital twin simulations

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12th CIRP Global Web Conference, CIRPe 2024

作者： Boareto, Pedro Antonio De Freitas Rocha Loures, Eduardo Portela Santos, Eduardo Alves Deschamps, Fernando Industrial and Systems Engineering Graduate Program Pontifical Catholic University of Paraná 1155 Imaculada Conceição St. Paraná Curitiba80215-901 Brazil Federal University of Paraná 632 Prefeito Lothário Meissner Av. Paraná Curitiba80210-170 Brazil

One of the key emerging technologies in Industry 4.0 is the Digital Twin (DT). Although it promises increased efficiency, productivity, and innovation, its adoption faces challenges such as high investment costs and the need for workforce requalification. Generative Artificial Intelligence (GAI) emerges as a promising solution, offering capabilities to accelerate development processes and reduce costs. This study aims to leverage GAI to enhance the development of DT and support decision-making in industrial environments by proposing a Generative Assistant for Digital Twin Simulations (GADTS). This proposal generates operational models quickly, offers greater customization, and facilitates the creation of efficient scenario simulations in natural language. The proposal was tested with artificial data. As a result, the development of highly personalized DT simulations with Key Performance Indicators (KPIs) was entirely abstracted into natural language requests. © 2025 Elsevier B.V.. All rights reserved.

关键词： Generative adversarial networks

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Modeling of a Hierarchical Supervisory Controlled Industrial Process for Fault Diagnosis

Modeling of a Hierarchical Supervisory Controlled Industrial...

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IEEE/IAS International Conference on Industry Applications (INDUSCON)

作者： Érique Moser Felipe Gomes Cabral Públio M. M. Lima Max Hering De Queiroz Automation and Systems Engineering Program Federal University of Santa Catarina (UFSC) Florianópolis Brazil

Modern industrial processes are hierarchically controlled in two levels. A continuous time control logic, such as Proportional integral derivative (PID) control, is implemented at the lower level to assure that the system behavior attains specifications of transient and permanent regimes, while at the higher level, a supervisory control ensures safety specifications for routine and non-routine operations. In general, both control strategies are projected without considering that the system components can suffer faults that can modify their expected behavior. Thus, a fault diagnosis strategy is fundamental to quickly indicate a fault event occurrence that can cause a deviation from the expected system behavior. In this paper, a discrete event diagnosis strategy is exploited for a two-level controlled tank liquid level system. To do so, we consider that a fault event can occur in the valve, which causes the valve to be stuck closed. We propose a modeling strategy for the valve that considers the fault consequences and its interaction with the remaining components. We show that this approach does not interfere with the control project, which allows the diagnoser synthesis to be achieved and implemented in an already-running controlled system.

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