Intelligent machining methods for Ti6Al4V: a review

Digital manufacturing is a necessity to establishing a roadmap for the future manufacturing systems projected for the fourth industrial revolution. Intelligent features such as behavior prediction, decision- making abilities, and failure detection can be integrated into machining systems with computational methods and intelligent algorithms. This review reports on techniques for Ti6Al4V machining process modeling, among them numerical modeling with finite element method (FEM) and artificial intelligence- based models using artificial neural networks (ANN) and fuzzy logic (FL). These methods are intrinsically intelligent due to their ability to predict machining response variables. In the context of this review, digital image processing (DIP) emerges as a technique to analyze and quantify the machining response (digitization) in the real machining process, often used to validate and (or) introduce data in the modeling techniques enumerated above. The widespread use of these techniques in the future will be crucial for the development of the forthcoming machining systems as they provide data about the machining process, allow its interpretation and quantification in terms of useful information for process modelling and optimization, which will create machining systems less dependent on direct human intervention.publishe

UM MÉTODO PARA APOIAR A CAPTURA DE INCIDENTES PARA ANÁLISE DE EMERGÊNCIAS

The organizations responsible to emergency management seek to improve their processes and response time, supported by operational plans where responsibilities and actions to be performed on are defined. However, incidents defined as adverse events and unexpected changes in the emergency plan often occur. The knowledge that team members develop dealing with these incidents is very valuable for the organizations. This paper presents the development of a capturing method of incidents not covered by the emergency plans to be implemented on the ongoing emergency through of observational techniques derived from Ethnography, Cognitive Task Analysis (CTA), and Critical Incident Technique (ICT) combined with elements of command and control.As organizações encarregadas da gestão de emergências procuram melhorar seus processos e o tempo de resposta apoiadas em planos operacionais onde são definidas responsabilidades e ações a serem executadas. Entretanto, muitas vezes ocorrem incidentes entendidos como eventos adversos e alterações não previstas pelo plano de emergência. O conhecimento que os membros das equipes desenvolvem ao lidar com estes incidentes é muito valioso para estas organizações. Neste trabalho é apresentado o desenvolvimento de um método de captura de incidentes não previstos pelo plano de emergência a ser aplicado no andamento da mesma através de técnicas observacionais oriundas da Etnografia, Análise de Tarefas Cognitivas (ATC), e Técnica do Incidente Crítico (TIC) combinadas com elementos de comando e controle

Direct and indirect effects of risks on service-oriented supply chain: a covid-19 pandemic perspective

Purpose - A solid service-oriented foundation is required to make supply chain management a competitive advantage, especially in this Covid-19 pandemic. A well-established service-oriented supply chain becomes more adaptable to changing client expectations. This study aims at analysing the direct and indirect impact of risks on the service-oriented supply chain from a pandemic perspective. Design/methodology/approach - The Q-sort method is applied with the participation of nine top-level managers to initially review the reliability, validity, and unidimensionality of research concepts. Then a questionnaire containing these measuring variables is developed to obtain the opinions of those who are experienced in logistics and supply chain management. These empirical data are analysed based on Structural Equation Modelling (SEM) to evaluate direct and indirect effects of risks on supply chain performance. Findings - The risk is inherent in service-oriented supply chains, affecting both direct and indirect performance. The proposed risk model explains 33.6 percent of Supplier performance, 46.4 percent of Operational performance, 47.1 percent of Customer satisfaction, and 46.5 percent of Finance variation. We found that service-oriented supply chains effectively monitor demand risk. External risk has the smallest impact on supply chain performance measures, whereas demand risk has the smallest effect. That a service-oriented supply chain is focused on meeting customer demand and managing demand-related risks is reinforced by these findings. Research limitations/implications - In the literature on supply chain risk management, resilience studies and disruption management receive less attention than studies on risk assessment and risk mitigation (Katsaliaki et al., 2021). Future supply chain risk management research should differentiate between risk-as an event and/or risk-as a process since they have different periodic effects on response management and resilience. Originality/value - This is a pioneering study lookingJICA - Japan International Cooperation Agency(undefined)This work was supported by the project of “An Empirical Study on Services Value Chain based on the Experiential and Credibility Values” (Grant-in-Aid for Scientific Research (A) No.25240050), and Japanese Government by Japan International Cooperation Agency (JICA) through AUN/SEED-Net Project: 022674.242.2015/JICA-A

The timing of formation of the Douro and Tejo rivers and implications for the evolution of the landscapes of central mainland Portugal

10th International Conference on Geomorphology, Coimbra, Portugal, 12–16 Sep 2022.The formation and development of major rivers limits the overall pace of the surrounding landscape evolution and drives sediment delivery from source to sink. The timings and rates of river incision may be a response to external influences, such as tectonic or climate driven base-level changes, or alternatively they may be linked to the breaching of internal thresholds, for example, drainage capture events. The Tejo and Douro rivers (also known as Tagus and Duero rivers) each drain a significant portion of the Iberian Peninsula and much of their courses through Portugal are typified by v-shaped valleys that are deeply incised into the surrounding topography. Earlier work has dated fluvial terrace deposits, mostly by luminescence techniques, but also by electron spin resonance and cosmogenic nuclide exposure dating. This has provided constraints on the late Pleistocene histories of the Tejo and Douro rivers, however, the timing of their transition from endorheic to exorheic is not precisely known and whether or not their histories are linked to a common mechanism is unclear. This study aims to provide age constraints on the early history of the Tejo and Douro rivers, and to examine whether and to what degree the erosion rates of low relief, granite etchplain landscapes within the river’s catchment areas are responding to the trunk channel incision. We focus on reaches of the Tejo and Douro rivers located in the eastern sector of mainland Portugal. Samples were collected for cosmogenic nuclide (10Be and 26Al) surface exposure and burial dating to date upper fluvial terrace levels. In addition, a combination of cosmogenic nuclide exposure ages and depth profiles in bedrock outcrops, alongside basin-wide erosion rate determinations will be used constrain the pace of evolution of nearby granitic landscapes. Preparation of the samples for measurement is ongoing and we will present our initial findings

Oral aspirin for treating venous leg ulcers

Background Venous leg ulcers (VLUs) or varicose ulcers are the final stage of chronic venous insufficiency (CVI), and are the most common type of leg ulcer. The development of VLUs on ankles and lower legs can occur spontaneously or after minor trauma. The ulcers are often painful and exudative, healing is often protracted and recurrence is common. This cycle of healing and recurrence has a considerable impact on the health and quality of life of individuals, and healthcare and socioeconomic costs. VLUs are a common and costly problem worldwideprevalence is estimated to be between 1.65% to 1.74% in the western world and is more common in adults aged 65 years and older. The main treatment for a VLU is a firm compression bandage. Compression assists by reducing venous hypertension, enhancing venous return and reducing peripheral oedema. However, studies show that it only has moderate effects on healing, with up to 50% of VLUs unhealed after two years of compression. Non-adherence may be the principal cause of these poor results, but presence of inflammation in people with CVI may be another factor, so a treatment that suppresses inflammation (healing ulcers more quickly) and reduces the frequency of ulcer recurrence (thereby prolonging time between recurrent episodes) would be an invaluable intervention to complement compression treatments. Oral aspirin may have a significant impact on VLU clinical practice worldwide. Evidence for the effectiveness of aspirin on ulcer healing and recurrence in high quality RCTs is currently lacking. Objectives To assess the benefits and harms of oral aspirin on the healing and recurrence of venous leg ulcers. Search methods In May 2015 we searched: The Cochrane Wounds Specialised RegisterThe Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library)Ovid MEDLINEOvid MEDLINE (In-Process & Other Non-Indexed Citations)Ovid EMBASE and EBSCO CINAHL. Additional searches were made in trial registers and reference lists of relevant publications for published or ongoing trials. There were no language or publication date restrictions. Selection criteria We included randomised controlled trials (RCTs) that compared oral aspirin with placebo or no drug intervention (in the presence or absence of compression therapy) for treating people with venous leg ulcers. Our main outcomes were time to complete ulcer healing, rate of change in the area of the ulcer, proportion of ulcers healed in the trial period, major bleeding, pain, mortality, adverse events and ulcer recurrence (time for recurrence and proportion of recurrence). Data collection and analysis Two review authors independently selected studies for inclusion, extracted data, assessed the risk of bias of each included trial and assessed overall quality of evidence for the main outcomes in the 'Summary of findings' table. Main results The electronic search located 62 studies. We included two RCTs of oral aspirin (300 mg/daily) given in addition to compression compared with compression and placebo, or compression alone. To date, the impact of aspirin on VLUs has been examined by only two randomised clinical trials, both with a small number of participants. The first RCT was conducted in the United Kingdom (n=20) and reported that daily administration of aspirin (300mg) in addition to compression bandages increased both the rate of healing, and the number of participants healed when compared to placebo in addition to compression bandaging over a four month period. Thirty-eight per cent of the participants given aspirin reported complete healing compared with 0% in the placebo group. Improvement (assessed by reduction in wound size) occurred in 52% of the participants taking aspirin compared with 26% in those taking placebo). The study identified potential benefits of taking aspirin as an adjunct to compression but the sample size was small, and neither the mechanism by which aspirin improved healing nor its effects on recurrence were investigated. In 2012 an RCT in Spain (n=51) compared daily administration of aspirin (300mg) in addition to compression bandages with compression alone over a five month period. There was little difference in complete healing rates between groups (21/28 aspirin and 17/23 compression bandages alone) but the average time to healing was shorter (12 weeks in the treated group vs 22 weeks in the compression only group) and the average time for recurrence was longer in the aspirin group (39 days: [SD 6.0] compared with 16.3 days [SD 7.5] in the compression only group). Although this trial provides some limited data about the potential use of aspirin therapy, the sample size (only 20 patients) was too small for us to draw meaningful conclusions. In addition, patients were only followed up for 4 months and no information on placebo was reported. Authors' conclusions Low quality evidence from two trials indicate that there is currently insufficient evidence for us to draw definitive conclusions about the benefits and harms of oral aspirin on the healing and recurrence of venous leg ulcers. We downgraded the evidence to low quality due to potential selection bias and imprecision due to the small sample size. The small number of participants may have a hidden real benefit, or an increase in harm. Due to the lack of reliable evidence, we are unable to draw conclusions about the benefits and harms of oral daily aspirin as an adjunct to compression in VLU healing or recurrence. Further high quality studies are needed in this area.Evidence Based Actions Department From Marilia Medical School - FAMEMA, BrazilFAPESP-Fundacao de Amparo a Pesquisa do Estado de Sao Paulo, BrazilNational Institute for Health ResearchEvidence Based Health Actions Department and Thoracic Surgery Department, Marilia Medical School, Marilia, BrazilDepartment of Medicine, Federal University of São Paulo, São Paulo, BrazilDepartment of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, AustraliaDepartment of Medicine, Federal University of São Paulo, São Paulo, BrazilWeb of Scienc

Editorial: Human impacts on bats in tropical ecosystems: sustainable actions and alternatives

Globally, the most extraordinary biodiversity is in the tropics, spread in a great diversity of vegetation types and habitats. Among the myriad mammalian groups, bats stand out for their remarkable taxonomic, functional, and phylogenetic diversity (Wilson and Mittermeier, 2019). Within the tropics, bats can be found in different vegetation types varying in a gradient of structural complexity from dense ancient forests to more open landscapes and woodlands in the savannas and fields (Meyer et al., 2004; Carvalho et al., 2021). Bats provide essential ecosystem services such as seed dispersal and pollination of the many plants that have a role in the income of the most impoverished human populations and the formal economy (Lacher et al., 2019). Moreover, as voracious insect predators, bats play a vital role in suppressing agricultural pests, an invaluable service in this part of the world, and disease vectors for humans (Aguiar et al., 2021; Tuneu-Corral et al., 2023). It is widely recognized that the main threat to bats globally is the extensive conversion of natural ecosystems, especially in tropical developing countries (Meyer et al., 2016). This shift in land use results in habitat loss and environmental degradation, with consequent loss of species, ecosystem services, and lineages (Frick et al., 2020; Atagana et al., 2021; Colombo et al., 2023). There is thus an urgent need to disseminate correct information about bats and explore best practices for mitigating the adverse effects stemming from human activities such as vegetation clearing for cattle ranching, agriculture, human settlements, and urbanization. Therefore, in this Research Topic, we aimed to bring together current research that assesses the influence of multiple environmental transformation drivers on the diversity of tropical bats. Nine papers were published in this Research Topic, and they present novel insights into how bats react to human-driven environmental changes and address significant gaps in bat conservation. These studies were conducted by 36 authors in six countries across the American, African and Asian continents (Figure 1). While the sampling was local in seven studies, Brasileiro et al. used data spanning Brazilian biomes, and Xavier et al. carried out a global systematic review. Three key themes emerge from the papers presented in this Research Topic, and we discuss the findings and knowledge gaps related to each theme in the following sections. Figure 1info:eu-repo/semantics/publishedVersio

Smart objects embedded production and quality management functions

In this paper, smart objects embedded production and quality management functions are proposed, to promote accurately support decision-making processes, from the shop floor level up to higher decision-making levels. The proposed functions contribute for different kind of problems solving in production and quality management, such as production planning and control, scheduling, factory supervision, real-time data acquisition and processing, and real-time decision making. The web access at different middleware devices and tools, at different decision levels, along with the use of integrated algorithms and tools, embedded in smart objects, promotes conditions for better decision-making for optimized use of knowledge and resources in production systems. The relevance of the proposed smart objects embedded production and quality management functions has been validated positively in a manufacturing company.The authors wish to acknowledge the support of the Fundação para a Ciência e Tecnologia (FCT), Portugal, through the grants: “Projeto Estratégico – UI 252 – 2011–2012” reference PEstOE/EME/UI0252/2011, and “Ph.D. Scholarship Grant” reference SFRH/BD/85672/2012.info:eu-repo/semantics/publishedVersio

Repro Money: An Extension Program to Improve Dairy Farm Reproductive Performance

A farmer-directed, team-based Extension program (Repro Money) was developed and executed by the University of Wisconsin–Madison Department of Dairy Science in collaboration with University of Wisconsin–Extension. The goal of the Repro Money program was to help Wisconsin dairy farmers increase reproductive performance and profitability through identification of areas for improvement and implementation of action plans. For the 40 Wisconsin dairy farms that completed the Repro Money program, mean 21-day pregnancy rate increased by 2 percentage points, which was estimated to result in an economic net gain of $31 per cow per year. Extension professionals can apply similar team-based programs to tackle multifaceted, interrelated problems that may be only partially addressed by other, more traditional programming

Foster Carers’ Perspectives about Contact in Portugal and Spain

This study aims at comparing the nature and processes of contact between children in foster care and their birth families; the relationship between the existence and quality of contact and foster carers’ burden; and the relationship between the existence or not of contact and the existence of reunification plans. Following a quantitative approach, data have been collected in Portugal and Spain from foster carers and professionals using questionnaires and Zarit's Carer scale. The results show that the existence of contact is not related to carers’ burden or stress, but there is an association between contact and reunification plans. As a consequence, several implications to practice are presented