Article
Engineering, Electrical & Electronic
Jing Huang, Huadong Guo, Guang Liu, Hanlin Ye
Summary: This study establishes a method to simulate EOR from a Moon-based radiometer and summarizes three characteristics of Moon-based EOR observations: the observational scope covers almost half of the Earth, the Earth-Moon distance greatly affects EOR; diurnal and seasonal variations influence OLR, and hemisphere-scale observations are less sensitive to the seasonal signals; a Moon-based platform can observe the Earth with different phases.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2022)
Article
Engineering, Mechanical
Xiaoshu Qin, Chang Peng, Gaozheng Zhao, Zengye Ju, Shanshan Lv, Mingshun Jiang, Qingmei Sui, Lei Jia
Summary: This study develops a full life-cycle monitoring approach for bolt loosening using a modified VAM method and nonlinear indexes, achieving earlier warning in the thread loosening stage. The results demonstrate the sensitivity of nonlinear indexes to predict bolt early looseness before the bolt head and interconnecting component loosening, contributing to the reliability of VAM-based bolt early loosening monitoring.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Computer Science, Information Systems
Stavros Ntalampiras
Summary: This article focuses on the critical field of monitoring the health of industrial machines based on acoustic emissions, and builds an audio-based monitoring solution using log-Mel spectrograms and convolutional neural networks. The systematic evaluation of four types of adversarial attacks reveals the serious vulnerabilities in current frameworks. Two different attack types are designed to induce either false positives or false negatives from the attacker's perspective. Three figures of merit are defined to assess the performance of each attack type.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Engineering, Mechanical
M. Seleznev, A. Weidner, H. Biermann, A. Vinogradov
Summary: Ultrasonic fatigue testing is an effective method for characterising high cycle fatigue properties of structural materials; however, limitations in existing measuring techniques make it difficult to understand the initiation and progression of fatigue damage. The development of the acoustic emission method in this study provides a new way to monitor the fatigue process, distinguish between different fatigue crack initiations, and track the development of fatigue damage.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Automation & Control Systems
Umair Ahmed, Fakhre Ali, Ian Jennions
Summary: This paper presents the development and implementation of an innovative approach for fault detection of an aircraft auxiliary power unit (APU). The developed approach aims to proactively identify faults to simplify maintenance and maximize aircraft availability. By using non-intrusive sensors (microphones) along with appropriate feature extraction, classification, and regression techniques, this study successfully demonstrates online fault detection of an APU. This research provides a potential solution for robust, cost-effective, and efficient in-situ monitoring of an aircraft APU and other associated thermal systems.
Article
Engineering, Electrical & Electronic
Shang Gao, Zirui Zhang, Jin Li, Yufei Tian, Jianhang Liu, Fang Wang
Summary: This article investigates the fatigue behavior of ultra-stainless steel (UHSSS) and proposes the use of acoustic emission (AE) nondestructive testing as a method to monitor its fatigue behavior. A wireless AE technology is introduced, and the interactions between AE and fatigue stage, as well as S-N curves under different stress ratios, are studied. An AE algorithm based on Shannon entropy is designed to evaluate the performance of UHSSS under high-cycle fatigue (HCF), overcoming the limitations of traditional AE parameter methods. The research verifies the quantitative relationship between cumulative information entropy and fatigue cycles of notched UHSSS specimens under different stress ratios, providing new insights into predicting fatigue limit and recognizing the fatigue status of steel structures solely based on AE signals.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Marine
Rafael Aguiar, Gianluca Maguolo, Loris Nanni, Yandre Costa, Carlos Silla
Summary: Passive acoustic monitoring (PAM) is a noninvasive technique for wildlife surveillance, where machine learning is useful for identifying species based on audio recordings. The experimental protocols using PAM filters were not intended to improve accuracy rates, but rather to provide more reliable results in the classification system.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Geological
Tao Xie, Cheng-Cheng Zhang, Bin Shi, Zheng Wang, Si-Si Zhang, Jun Yin
Summary: Distributed acoustic sensing (DAS) using fiber-optic cables has potential for rockfall monitoring, but further research is needed to evaluate its performance. This study assesses DAS capabilities for rockfall monitoring and finds that it is effective in detecting rockfall impacts. Fiber configuration affects DAS sensitivity, and spectral features exhibit spatial stability. Attempts to locate rockfall sources from DAS arrays are feasible but require optimization.
ENGINEERING GEOLOGY
(2023)
Article
Engineering, Geological
Lizheng Deng, Hongyong Yuan, Jianguo Chen, Mingzhi Zhang, Guofeng Su, Rui Pan, Yang Chen, Xiangrui Meng
Summary: The quality of landslide monitoring data is crucial to early warning systems and can be improved through innovation in monitoring techniques. This study developed a novel monitoring equipment with an AE array, which standardizes equipment manufacturing and improves data interpretation consistency. The developed AE monitoring system is well-suited for low-income mountainous areas with a high risk of landslides.
ENGINEERING GEOLOGY
(2023)
Article
Environmental Sciences
Liege F. K. Wosiacki, Hugo Koji Suekame, Molly S. Wood, Fabio Verissimo Goncalves, Tobias Bleninger
Summary: Fluvial systems are used for various purposes, and understanding sediment dynamics is crucial as erosion and deposition processes can alter the morphology and environment of these systems. This study presents an innovative sediment monitoring technique using an acoustic Doppler current profiler to measure suspended sediment concentration. The technique involves applying corrections to obtain accurate SSC measurements and can expand sediment data collection even with reduced traditional sampling.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2021)
Article
Engineering, Mechanical
Enrique Caso, Alberto Diez-Ibarbia, Pablo Garcia, Javier Sanchez-Espiga, Alfonso Fernandez-del-Rincon
Summary: Acoustic emission (AE) technology has been used to monitor the wire drawing process in an industrial environment. The correlation between AE measurements and process parameters, such as drawing speed, die temperature, lubricant type, wire diameter, and die status, has been studied to develop a reliable monitoring system. The results show that AE amplitude is correlated with lubricant chemical composition and die temperature, and variations in AE spectra reflect slight changes in the process when different wire materials or die sets are used.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Medicine, General & Internal
Tjitske Zaat, Jan-Peter de Bruin, Mariette Goddijn, Marchien van Baal, Sofie Benneheij, Monique Brandes, Frank Broekmans, Astrid Cantineau, Ben Cohlen, Jeroen van Disseldorp, Susanne Gielen, Eva Groenewoud, Arne van Heusden, Eugenie Kaaijk, Carolien Koks, Corry de Koning, Nicole Klijn, Paul van der Linden, Petra Manger, Lobke Moolenaar, Robbert van Oppenraaij, Quirine Pieterse, Jesper Smeenk, Jantien Visser, Madelon van Wely, Femke Mol
Summary: The study showed that home-based monitoring of ovulation is just as effective as hospital-controlled monitoring when timing frozen-thawed embryo transfer (FET), with similar ongoing pregnancy rates in both groups.
Article
Biodiversity Conservation
Leandro A. Do Nascimento, Cristian Perez-Granados, Karen H. Beard
Summary: Research on nighttime vocal behaviors of primates, such as the Guianan red howler monkey, is lacking. Howlers were found to vocalize mainly at night, potentially related to territorial and resource defense behaviors. Differences in acoustic structures between day and night howling bouts were observed, with longer bouts and lower frequencies during the day.
Article
Chemistry, Multidisciplinary
Hongshuang Guo, Ming Bai, Yingnan Zhu, Xinmeng Liu, Shu Tian, You Long, Yiming Ma, Chiyu Wen, Qingsi Li, Jing Yang, Lei Zhang
Summary: A zwitterionic skin sensor system has been developed to continuously monitor and differentiate three-stimuli-responsive information in real-time, avoiding signal interference. This system utilizes a sandwich structure to monitor temperature, mechanical, and glucose information through variations in capacitance and resistance in different layers, which can be used for smart wound dressings to monitor chronic diabetic wounds.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Ecology
Emmanuel Dufourq, Carly Batist, Ruben Foquet, Ian Durbach
Summary: Progress in deep learning, specifically in using convolutional neural networks for classification models, has been significant. This study investigates the use of transfer learning in passive acoustic monitoring, showing that it can improve F1 score up to 82% while simplifying implementation and design decisions.
ECOLOGICAL INFORMATICS
(2022)
Article
Zoology
Cristian Perez-Granados, Karl-L. Schuchmann, Marinez I. Marques
Summary: Passive acoustic monitoring coupled with automated signal recognition software was used to monitor the vocal behavior of the Ferruginous Pygmy-Owl. The species showed highest vocal activity in the hours prior to sunrise during the crepuscular periods. Breeding period starts in June, and nesting phase likely begins in September.
STUDIES ON NEOTROPICAL FAUNA AND ENVIRONMENT
(2023)
Article
Green & Sustainable Science & Technology
Guillaume Latombe, Hanno Seebens, Bernd Lenzner, Franck Courchamp, Stefan Dullinger, Marina Golivets, Ingolf Kuehn, Brian Leung, Nuria Roura-Pascual, Emma Cebrian, Wayne Dawson, Christophe Diagne, Jonathan M. Jeschke, Cristian Perez-Granados, Dietmar Moser, Anna Turbelin, Piero Visconti, Franz Essl
Summary: This study investigated the impact of socio-economic and environmental factors on biological invasions and found that trade, governance, lifestyle and education are the best indicators for explaining invasive species richness and a country's capacity to manage invasions. Historical levels of governance and trade were found to have a stronger influence than recent levels, highlighting the importance of historical factors in shaping future invasions. The results provide valuable insights for decision-making and management of biological invasions.
SUSTAINABILITY SCIENCE
(2023)
Article
Ornithology
Cristian Perez-Granados, Karl-L Schuchmann
Summary: Studying the vocal behavior of the Striped Cuckoo in the Brazilian Pantanal revealed clear seasonal patterns and differences between different vocalization types. The study suggests that the Striped Cuckoo breeds during the dry season and leaves during the flooding period.
Article
Biology
Kathrin Burs, Lydia Moecklinghoff, Marinez Isaac Marques, Karl-L. Schuchmann
Summary: This study used camera trap data to investigate the spatial and temporal patterns of lowland tapirs in two different regions of the Pantanal wetland in Brazil. The results show that habitat characteristics, seasons, and human activities have different effects on tapirs in these regions. Adaptation strategies based on avoidance may be more effective in areas with less human pressure and sufficient protected areas.
Article
Ecology
Cristian Perez-Granados, Karl -L. Schuchmann
Summary: Passive acoustic monitoring coupled with automated signal recognition software has been widely used for wildlife monitoring and combatting illegal activities. This study evaluates the performance of this technique in monitoring illegal cattle occurrences in the Brazilian Pantanal. The study found that automated software efficiently detected cow calls and could be used to direct patrols to areas with confirmed illegal activities. Future studies should assess the impact of cattle grazing on wildlife and flora, and advancements in automated recognition offer potential for improved conservation.
ECOLOGICAL INFORMATICS
(2023)
Editorial Material
Ornithology
Cristian Perez-Granados
Summary: Automated recognition software, such as BirdNET, is crucial for effective passive acoustic monitoring. Despite growing popularity, BirdNET has been subject to few assessments, hindering the interpretation of ecological results and decision-making. Studies evaluating BirdNET show relatively high average precision (72-85% of correctly identified detections) and recall rate (33-84% of target species vocalizations detected), but few have linked BirdNET detections to ecological processes or real-world monitoring schemes. Recommendations for evaluating BirdNET efficiency and considering the confidence score threshold are provided.
Article
Agriculture, Multidisciplinary
Julia Gomez-Catasus, Margarita Reverter, Daniel Bustillo-de la Rosa, Adrian Barrero, Cristian Perez-Granados, Julia Zurdo, Juan Traba
Summary: Open semi-natural ecosystems have been affected by anthropogenic land-use, with the abandonment or intensification of activities causing detrimental landscape alterations. This study focuses on the impact of sheep grazing on arthropod biomass and space use by insectivorous birds, finding that intermediate levels of grazing lead to the highest biomass of different arthropod groups. Short-term grazing affects arthropod biomass, while long-term grazing influences vegetation structure and determines bird territory establishment. The results highlight the importance of sustained moderate grazing in conserving steppe biodiversity.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2023)
Article
Ornithology
Filipe Ferreira de Deus, Karl-L. Schuchmann
Summary: This study investigated the movement patterns of hummingbirds in the highly variable environment of the Brazilian Pantanal. The results showed significant differences in species richness and abundance between habitats, with savanna habitats being the richest during rainy seasons.
ORNITOLOGIA NEOTROPICAL
(2023)
Article
Chemistry, Analytical
Gerard Bota, Robert Manzano-Rubio, Lidia Catalan, Julia Gomez-Catasus, Cristian Perez-Granados
Summary: The efficient analysis of sound recordings obtained through passive acoustic monitoring is challenging due to the large amount of data collected. BirdNET, a new machine learning tool, was evaluated for its effectiveness in identifying and detecting two cryptic forest bird species. BirdNET showed high precision rates for both species and successfully detected them in the majority of annotated recordings.
Article
Zoology
Aline de Oliveira Lira, Wesley Oliveira de Sousa, Marinez Isaac Marques
Summary: This study describes four new species discovered in Brazil, namely Heilus rosadonetoi Lira, De Sousa & Marques sp. nov., Heilus christinae Lira, De Sousa & Marques sp. nov., Heilus vanini Lira, De Sousa & Marques sp. nov., and Heilus obrieni Lira, De Sousa & Marques sp. nov. The new species are illustrated with photographs and drawings. The genus Heilus now includes a total of 22 species in the Neotropical region, with Brazil having the highest number of species (16 species).
Article
Biodiversity Conservation
Margarita Reverter, Cristian Perez-Granados, German M. Lopez-Iborra, Amparo Garcia-Mellado, Emilio Aledo-Olivares, Manuel Alcantara, Antonio Aranda, Adrian Barrero, Gerard Bota, Daniel Bustillo-de la Rosa, David Cubero, David Giralt, Julia Gomez-Catasus, Matias de las Heras, Jose M. Fernandez-Palacios, Jose R. Garrido, Mariano Paracuellos, Miguel A. Rubio, Gema Ruiz, Pedro Saez-Gomez, Victor Salvador, Javier Sampietro, Ana Santos-Torres, David Serrano, Julia Zurdo, Juan Traba
Summary: The population of the Dupont's lark in Europe has declined by 29.9% from 2004 to 2009, and the species' distribution range has also decreased by 35.9%. Only 39.3% of the species' territories are currently protected within special protection areas. Urgent conservation measures are needed to prevent the species from going extinct.
