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arXiv 2022年

作者： de Lima, Leandro M. Krohling, Renato A. Graduate Program in Computer Science PPGI Federal University of Espirito Santo UFES Vitória Brazil Graduate Program in Computer Science PPGI Production Engineering Department LABCIN Federal University of Espirito Santo UFES Vitória Brazil

Skin cancer is one of the most common types of cancer in the world. Different computer-aided diagnosis systems have been proposed to tackle skin lesion diagnosis, most of them based in deep convolutional neural networks. However, recent advances in computer vision achieved state-of-art results in many tasks, notably Transformer-based networks. We explore and evaluate advances in computer vision architectures, training methods and multimodal feature fusion for skin lesion diagnosis task. Experiments show that PiT (0.800±0.006), CoaT (0.780±0.024) and ViT (0.771±0.018) backbone models with MetaBlock fusion achieved state-of-art results for balanced accuracy metric in PAD-UFES-20 dataset. © 2022, CC BY.

关键词： Classification (of information)

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Simultaneous extraction of crude polysaccharides, soluble proteins, gingerols, and shogaols from dried ginger by subcritical water extraction

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LWT 2025年 225卷

作者： Sakdasri, Winatta Kaomaneechot, Sunanta Lasim, Sarida Somboon, Pichayada Chotigavin, Natthaporn Wongpromrat, Patthranit Sawangkeaw, Ruengwit Program in Food Process Engineering School of Food Industry King Mongkut's Institute of Technology Ladkrabang 1 Chalong Krung 1 Alley Latkrabang Bangkok10520 Thailand Program in Fermentation Technology School of Food Industry King Mongkut's Institute of Technology Ladkrabang 1 Chalong Krung 1 Alley Latkrabang Bangkok10520 Thailand Program in Food Science and Technology School of Food Industry King Mongkut's Institute of Technology Ladkrabang 1 Chalong Krung 1 Alley Latkrabang Bangkok10520 Thailand Department of Chemical Engineering School of Engineering King Mongkut's Institute of Technology Ladkrabang 1 Chalong Krung 1 Alley Latkrabang Bangkok10520 Thailand Research Unit in Bioconversion/Bioseparation for Value-Added Chemical Production Institute of Biotechnology and Genetic Engineering Chulalongkorn University 254 Phayathai Road Pathumwan Bangkok10330 Thailand

Subcritical water extraction (SWE) is a remarkable method for the simultaneous extraction of high- and low-polarity bioactive compounds from ginger. This study investigated the effects of temperature, pressure, and extraction time on the crude polysaccharide yield, protein content, total phenolic content (TPC), and amounts of 6-gingerol and 6-shogaol. The pressure was maintained at 30 bars, and the temperature and extraction time were optimized to maximize the polysaccharide yield, protein, TPC, gingerols, and shogaols contents. The rising temperatures (100–160 °C) and extended extraction times (10–50 min) enhanced the yield and TPC but negatively affected protein stability, leading to thermal degradation when the temperature surpassed 180 °C. Specifically, the content of 6-gingerol decreased at high temperatures because of its conversion into 6-shogaol. The optimal extraction conditions were 160 °C for 40 min at 30 bars, resulting in a polysaccharide yield of 8.54 %, protein content of 100.35 mg body surface area/g dry mass, TPC of 18.10 mg Galic acid (GA)/g dry mass, 6-gingerol content of 2.14 mg/g dry mass, and 6-shogaol content of 0.28 mg/g dry mass. Therefore, SWE effectively extracts various polar bioactive compounds from plant materials in a single step. © 2025 The Authors

关键词： Ginger polysaccharides Soluble protein Gingerols Shogaol Subcritical water

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Impact of the DRG System on Technical Efficiency: A Case Study of Chilean High-Complexity Hospitals

Impact of the DRG System on Technical Efficiency: A Case Stu...

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Computer Science Society (SCCC) International Conference Chilean

作者： Javier Pérez-Cáceres José Lillo-Vidal Igor Tona Peres Manuel Villalobos-Cid Departamento de Ingeniería Informática Universidad de Santiago de Chile Santiago Chile Department of Industrial Engineering Pontifical Catholic University of Rio de Janeiro Rio de Janeiro Brazil Program for the Development of Sustainable Production Systems (PDSPS) Universidad de Santiago de Chile Santiago Chile

ISBN: (数字)9798331527891

ISBN: (纸本)9798331527907

The efficient use of resources is critical in healthcare. Despite significant expenditure increases, hospital productivity has stayed the same proportionally in Chile, suggesting potential issues in resource management. Technical efficiency (TE) allows the comparison of hospitals with similar profiles of patients or case-mix, which is critical for understanding how resources are utilised to generate healthcare outputs. Internationally, the Diagnosis Related Groups (DRG) system has been widely used as a standard to normalise and perform fair comparisons of healthcare production. However, in Chile, its implementation could be improved. The present study evaluates the TE of high-complexity public hospitals in Chile using computational methods, including Data Envelopment Analysis (DEA) and the Malmquist productivity index (MPI). We compare the impact of the DRG system in TE estimation with other categorisations used in the related literature, such as the Chilean Ministry of Health and geographical categorisation. Results reveal significant differences between the TE estimated (5% to 50%), discrepancies in rankings, and resource utilisation. These findings suggest that the full use of the DRG system in TE must be included since it enhances resource allocation and management in public hospitals.

关键词： Productivity Computer science Hospitals Estimation Resource management Indexes Standards Data envelopment analysis

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Renewable Energy Potential of Rice Straw and Paunch Manure as Bioethanol Feedstocks in Central Java, Indonesia

SSRN

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SSRN 2024年

作者： Chanifah Arianti, Forita Dyah Triastono, Joko Pertiwi, Miranti Dian Prabowo, Agung Prasetyo, Teguh Haryanto, Bambang Megawati Astuti, Widi Djarot, Ira Nurhayati Santoso, Arif Dwi Widjayanti, Sri Peni Research Center for Sustainable Production System and Life Cycle Assessment National Research and Innovation Agency Banten15314 Indonesia Research Center for Behavioral and Circular Economics National Research and Innovation Agency Jakarta12710 Indonesia Chemical Engineering Study Program Faculty of Engineering E1 Building 2nd floor Semarang Negeri Semarang Semarang50229 Indonesia

Almost all farmers are unaware that rice straw and paunch manure are potential feedstocks for bioethanol besides organic fertilizer, biochar, and biogas. Farmers' perceptions regarding the multiattributes of bioethanol development are still underestimated, indicating that farmers are still indecisive about the potential use of rice straw and paunch manure as feedstock for bioethanol. They still need extension and training to improve their knowledge. The Location Quotient (LQ) value of rice straw and cow paunch manure is > 1, indicating that Karanganyar Regency could become a base for bioethanol development from rice straw and cow paunch manure © 2024, The Authors. All rights reserved.

关键词： Manures

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TODIM and TOPSIS with Z-numbers

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Frontiers of Information Technology & Electronic engineering 2019年第2期20卷 283-291页

作者： Renato A.KROHLING André G.C.PACHECO Guilherme A.dos SANTOS Department of Production Engineering Federal University of Espirito Santo Graduate Program in Computer Science Federal University of Espirito Santo

In this paper, we present an approach that can handle Z-numbers in the context of multi-criteria decision-making problems. The concept of Z-number as an ordered pair Z=(A, B) of fuzzy numbers A and B is used, where A is a linguistic value of a variable of interest and B is a linguistic value of the probability measure of A. As human beings, we communicate with each other by means of natural language using sentences like "the journey from home to university most likely takes about half an hour." The Z-numbers are converted to fuzzy numbers. Then the Z-TODIM and Z-TOPSIS are presented as a direct extension of the fuzzy TODIM and fuzzy TOPSIS, respectively. The proposed methods are applied to two case studies and compared with the standard approach using crisp values. The results obtained show the feasibility of the approach.

关键词： Multi-criteria decision-making TODIM TOPSIS Fuzzy number Z-number

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Optimizing care of visually impaired people in the Emergency Care Units (UPA) – a technical briefing applying Lean concept

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IFAC-PapersOnLine 2022年第10期55卷 544-548页

作者： J.R.S Ramos R.D Calado I.R.S Fausto S.C.C.S Pinto A.M. Teixeira R.M.M. Braz Postgraduate Program in Sciences Technologies and Inclusion (PGCTIn) Fluminense Federal University - UFF Niterói Brazil Production Engineering Department. Federal Fluminense University - UFF Volta Redonda Brazil DAHU/ Ministry of Health Brazil

Lean principles have been largely used with excellent results in the automotive business and in many other different areas of human knowledge such as health care. The objective of this work is to evaluate the application of lean principles and methods as assistive technology for the optimization of care of visually impaired people in the Emergency Care Units (24h -UPA). To explore this issue, it is proposed an empirical analysis of the environmental performance in one chosen UPA, installing a sensory guidance system and other auxiliary devices following ABNT standards. The idea is to reduce the waste of waiting time of these patients and make this UPA a “state of art” in accessibility for people with visual impairment and used as a “pilot Unit” for innovations evaluation and results comparison with other UPA. Two indicators “Length of Stay” and “Door to Dock” during the service of these patients will be closely monitoring (a kind of fast track service), also aiming the accessibility and inclusion of these individuals, improving their self-esteem and quality of life.

关键词： Accessibility Visually impaired people Lean Healthcare Waste Assistive Technology Emergency Care Unit (UPA)

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The product-mold-machine manufacturing problem

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IFAC-PapersOnLine 2022年第10期55卷 866-871页

作者： Nelson Troncoso Héctor Cancela Pedro Piñeyro Franco Quezada Óscar C. Vásquez University of Santiago of Chile (USACH) Faculty of Engineering Program for the Development of Sustainable Production Systems (PDSPS) Chile University of Santiago of Chile (USACH) Faculty of Engineering Industrial Engineering Department Chile Departamento de Investigación Operativa Instituto de Computación (InCo) Facultad de Ingeniería Universidad de la República Uruguay

This paper introduces the product-mold-machine manufacturing problem, which is related to the manufacturing process of tires, plastics, ceramics, and glass. Each product has its own shape and mechanical properties obtained from processing a specific mold on a machine. Each machine can process a set of molds at the same time and, hence, the processing time on a machine depends on the longest processing time among the set of molds on the machine. The objective is to find a production plan that minimizes the total number of periods needed to meet the demand of each product, considering a limited number of machines, molds, changeover times, and incompatibilities constraints. We provide a mixed integer linear programming model for the problem and propose two constructive heuristics of polynomial-time, which provide upper bounds on the optimal value and easy-to-implement feasible solutions. Numerical experiments carried out over instances based on real data show the effectiveness of the proposed approaches.

关键词： Scheduling Lot-sizing Makespan Combinatorial Optimization Heuristics

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Drivers of the World Tourism: A Regional View

SSRN

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SSRN 2023年

作者： Ventura, Rodrigo V. Fernandes, Elton Cabo, Manoela de Mello Carvalho, Carla F. Fernandes, Vicente Aprigliano COPPE Production Engineering Program UFRJ Federal University of Rio de Janeiro Rio de Janeiro Brazil COPPE Transportation Engineering Program UFRJ Federal University of Rio de Janeiro Rio de Janeiro Brazil IBGE Brazilian Institute of Geography and Statistics Rio de Janeiro Brazil Escuela de Ingeniería de Construcción y Transporte Pontificia Universidad Católica de Valparaíso Chile

The commercial air transport innovation and its technological evolution, especially after the Second World War, are fundamental factors in the people's movement growth between the nations of the planet. Advances in air transport and income growth have allowed more and more people to realise the dream of getting to know and interacting with cultures from other countries, most times very far from their places of residence. Many studies examine the travel demand evolution more broadly or specifically between locations, which we can characterise as tourist demand. The quest to understand the drivers that move people between different destinations on the planet is a fundamental element of the company's planning and for the public policies formulation. This study contributes to this sense, analysing three socioeconomic factors of the world reality: globalisation, the countries’ economic structure and this structure's dynamics. Using panel data regression analysis methodology and the World Bank's world development indicators, relationships between the international tourism evolution and the mentioned socioeconomic factors are estimated and discussed. Each of the three perspectives analysed shows a strong relationship with the historical demand for tourism. The globalisation indicator revealed a growing positive impact on the level of tourist movement. The country's economic structure indicator showed a significant difference between countries, which suggests the need to examine tourism according to regions concept. Among dynamics indicators, income was the major factor in the tourism indicators variation. © 2023, The Authors. All rights reserved.

关键词： Regression analysis

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A Short Review on Oil Palm Biomass as Feedstock for Pyrolysis Process 2nd

A Short Review on Oil Palm Biomass as Feedstock for Pyrolysi...

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2nd International Conference on Recent Advances in Mechanical engineering, RAME 2020

作者： Shrivastava, Pranshu Kumar, Anil Palamanit, Arkom Energy Technology Program Faculty of Engineering Prince of Songkla University 15 Karnjanavanich Rd. Hat Yai Songkhla90110 Thailand Department of Mechanical Production & Industrial and Automobile Engineering Delhi Technological University Shahbad Daulatpur Delhi110042 India Centre for Energy and Environment Delhi Technological University Shahbad Daulatpur Delhi110042 India Energy Technology Program Department of Specialized Engineering Faculty of Engineering Prince of Songkla University 15 Karnjanavanich Rd. Hat Yai Songkhla90110 Thailand

ISBN: (纸本)9789811596773

Oil palm biomass is one of the potential biomasses to produce biofuels and several value-added products because of its favorable physicochemical characteristics and its abundance in the Southeast Asia particularly. This paper presents an overview of oil palm biomass as a feedstock for pyrolysis process. The primary characteristics of oil palm biomass based on chemical composition, ultimate analysis, and proximate analysis including the recent developments in thermochemical conversion technologies for value-added products from slow pyrolysis and fast pyrolysis are briefly explained. The properties of bioproducts like bio-oil and biochar in terms of fuel properties in comparison with petroleum fuel are also mentioned. The future prospects along with the major challenges for the usage of oil palm biomass as a potential biomass for bioproducts production are also mentioned. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Biomass Bioproducts Oil palm biomass Pyrolysis

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Georeferencing System for Maneuvering of Autonomous Truck in Mining Environment

Georeferencing System for Maneuvering of Autonomous Truck in...

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International Carpathian Control Conference (ICCC)

作者： Emanuel Francisco Vicentini Carvalho Lucas Silva De Oliveira Murillo Ferreira Dos Santos Paolo Mercorelli Matheus Carvalho Gouveia Master Degree Program in Automation and Systems CEFET-MG Leopoldina Brazil Department of Mechatronics Engineering CEFET-MG Divinópolis MG Brazil Department of Electroelectronics CEFET-MG Leopoldina Brazil Institute for Production Technology and Systems (IPTS) Leuphana University of Lüneburg Lüneburg Germany Electrical Engineering B. Sc UFJF-MG Juiz de Fora MG Brazil

ISBN: (数字)9798350350708

ISBN: (纸本)9798350350715

Mining automation began in the 1960s to increase safety in underground mines. Today, robotic and autonomous systems perform specific mining activities, creating new oppor-tunities and a more efficient and safe industry. This paper proposes a novel solution for instrumentation for autonomous trucks working in open-pit mines, specifically during the parking maneuver to load ore. In this case, new hardware and firmware are developed to compute the future coordinates of the excavator bucket using two Global Positioning Systems (GPS) receivers. In this approach, employing the concept of geometry and information from the GPS receivers, the future coordinates of the excavator bucket are calculated and made available to control the system, parking the autonomous truck in the desired position. The results demonstrate the accurate positioning of the off-highway truck during the ore-loading process, allowing for the correct execution of the truck's autonomous positioning maneuver.

关键词： Automation Receivers Excavation Hardware Real-time systems Safety Vehicle dynamics

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