Preface to the Proceedings of the 7th International Symposium on Laser Ultrasonics and Advanced Sensing (LU2024)

Based on the use of laser as a coherent and intense light source, the photo–acoustics originated from the discovery made by Alexander Graham Bell was extended to laser–ultrasonics (LU), and it has been applied to wide area of ultrasonics, optics, material characterization and nondestructive inspection.In 1996, a research group for LU was started in the Japanese Society for Nondestructive Inspection (JSNDI), and researches on LU and related topics such as noncontact measurements and elastic wave theories were discussed. Similar activities were pursued also in North America and in Europe. The international symposium on LU was started in Montreal, Canada in 2008 by Jean Pierre Monchalin in order to offer a forum for involved with basic researches and industrial applications of LU. In the second symposium in Bordeaux, France nearly 120 papers were presented. It is our honor to have organized the third symposium, LU2013 on 25–28 June in Yokohama, Japan. The articles published here provide a sample of achievements presented there.In LU2013, we focused on the laser generation and/or detection of acoustic waves, application to nondestructive testing, ultrafast–optoacoustics and innovative instruments. Research achievements in biomedical applications, advanced sensing including noncontact, micro/nanoscale or nonlinear measurements, as well as theory and simulation of ultrasound were also included, considering the interdisciplinary nature of this field.We enjoyed very excellent and informative 3 plenary talks, 11 invited talks, 81 oral and 41 poster presentations with 168 attendees. According to requests, we organized a post deadline poster session to give an opportunity to present recent achievements after the deadline. Contributions of the participants, the scientific and organizing committees are highly appreciated. The conference tour was a dinner cruise to the Tokyo bay, and we hope this experience will remain as a pleasant memory in attendees. As decided in the meeting for the next symposium, the next symposium will be held in Chicago, USA in 2015. We would be happy if the articles in this issue work as a trigger to attend LU2015.Kazushi YamanakaIkuo IharaMakoto OchiaiFurther conference information and photographs are found in the pdf.

Laser ultrasonic surface wave inspection of alumina ceramics of varying density

In this paper, the laser ultrasonic non-destructive testing technology was used to detect the microstructure and mechanical properties of selective laser melting (SLM) 316 L stainless steel after post-treatment. The microstructure and mechanical properties of additively manufactured 316 L stainless steel were measured by Scanning electron microscopy (SEM), Electron backscatter diffraction (EBSD), tensile testing, etc. The laser ultrasonic longitudinal wave signal characteristic values were coupled with the microstructure and mechanical properties of SLM 316 L stainless steel. The results show that: The yield strength has a good correlation with wave speed and attenuation. With the increase of holding temperature and holding time, the grain size increases, the low angle grain boundary decreases, the yield strength gradually decreases from 409 MPa to 359 MPa, the wave velocity increases from 5579 m/s to 5700 m/s, and the frequency domain attenuation coefficient increases from 0.13 dB/mm to 0.16 dB/mm, the central frequency domain is about 10 MHz. The ultimate tensile strength is related to the frequency domain attenuation. The ultimate tensile strength decreases with the increase of the frequency domain attenuation coefficient. It can provide a reference for the evaluation of mechanical properties by laser ultrasonic testing.

The positioning and quantitative testing of drilling-induced delamination in aircraft composite structures is not only one of the main difficulties in the field of non-destructive testing(NDT), but also a security problem need to be solved in aviation industry. Laser ultrasonic testing technique is a possible way to solve the problem. An experiment study concerning the verification of the feasibility of detecting drilling-induced delamination with laser ultrasonic technique is carried out. A composite laminate with drilling holes is made as specimen, the broadband characteristics of ultrasonic waves in composites generated by pulse laser are studied, and the wave signals with good signal-to-noise ratio(SNR), high sensitivity and resolution are extracted. The effects of the interface of drilling-induced delamination on the propagation characteristics of laser ultrasonic waves are studied, and the characterization methods of drilling-induced delamination with laser ultrasonics are acquired. Based on the pulse echo and transmission method, the laser ultrasonic C scan testing of the composite laminate with drilling holes is accomplished, and the morphologies, dimensions and positions of drilling-induced delamination are obtained. The research results show that laser ultrasonic testing is an effective method to detect the drilling-induced delamination in aircraft composite structures.

Laser ultrasonics in a point-source-point-receiver configuration is applied for the evaluation of elastic properties of nontransparent materials in a diamond anvil cell at high pressures. Measurement of both longitudinal and shear acoustic wave velocities in an iron foil at pressures up to 23 GPa does not require any information in addition to the one obtained by all-optical pump-probe technique.

Laser ultrasonics for nondestructive testing of composite materials and structures: A review

To adapt to this changing world and China’s fast development in this new era, the 2020 2nd International Academic Exchange Conference on Science and Technology Innovation (IAECST 2020) was to be held in December 2020. Organized jointly by over ten universities and academic societies, this conference takes “bringing together global wisdom in scientific innovation to promote high-quality development” as the theme and focuses on cutting-edge research fields including information technology, artificial intelligence, biomedicine, big data, water conservancy project, civil engineering, construction engineering, new energy and new materials. This conference aims to boost development of the Greater Bay Area, expand channels of international academic exchange in science and technology, build a sharing platform of academic resources, promote scientific innovation on the global scale, improve academic cooperation between China and the outside world. It also aims to encourage exchange of information on research frontiers in different fields, connect the most advanced academic resources in China and abroad, turn research results into industrial solutions, bring together talents, technologies and capital to boost development.The International Conference on Communications, Information System and Software Engineering (CISSE 2020) hold as a sub-venue of the 2020 2nd International Academic Exchange Conference on Science and Technology Innovation (IAECST 2020). The conference hosted by AEIC Academic Exchange Information Centre. We warmly welcome previous and prospected authors submit your new research papers to CISSE 2020, and share the valuable experiences with the scientist and scholars around the world.The conference model was divided into two sessions, including oral presentations and keynote speeches. In the first part, some scholars, whose submissions were selected as the excellent papers, were given 15 minutes to perform their oral presentations one by one. Then in the second part, keynote speakers were each allocated 30-45 minutes to hold their speeches. In this conference, we were greatly honored to have invited Prof. Anhui Liang from Guangdong University of Technology, GDUT, China as our Conference Chair. There were over 70 experts and scholars in the area of Communications, Information System and Software Engineering representing different famous universities and institutes around the globe to attend the conference.During the conference, we were pleased to invite four distinguished experts to present their insightful speeches. Prof. Nikolaos Freris, our first keynote speaker, from University of Science and Technology of China. His research interests: Reliability Design, Simulation and Modeling of Integrated Circuits and Electronic Devices. Prof. Philippe Fournier-Viger, from Harbin Institute of Technology. He devoted to Data Mining, Big Data, Artificial Intelligence, Pattern Mining, Itemset Mining, Graph Mining, Sequence Prediction and other related research area. Prof. Yulin Wang, from Wuhan University. He had outstanding research in Image and Video Processing, Digital Rights Management, Information Security, Intelligent System, E-Commerce, IoT, Code Clone and other related area. A.Prof. Miaowen Wen, our finale keynote speaker, from South China University of Technology. His research area: Wireless Communication, Molecular Communications.The participants of the conference were from most part of the world, with background of either academia or industry, even well-known enterprise. The success and prosperity of the conference is reflected high level of the papers received. The proceedings are a compilation of the accepted papers and represent an interesting outcome of the conference. CISSE 2020 for exchange of research findings, analysis, information, and knowledge in areas which include but are not limited to: Emergency Communication, Remote Sensing and Satellite Communication, Big Data and Intelligent Computing, Blockchain Technology and Systems, Emerging Embedded Applications and Interdisciplinary Topics Track, Software Engineering and other related topics.We would like to acknowledge all of those who supported CISSE 2020. Each individual and institutional help are very important for the success of this conference. Especially we would like to thank the organizing committee for their valuable advices in the organization and helpful peer review of the papers. We sincerely hope that CISSE 2020 will be a forum for excellent discussions that will put forward new ideas and promote collaborative researches. We are sure that the proceedings will serve as an important research source of references and the knowledge, which will lead to not only scientific and engineering progress but also other new products and processes.The Organizing Committee of CISSE 2020List of Committee member, Conference Chair, Academic Committees Member, International Technical Program Committees Member, Organization Committees Member are available in the pdf.

The 37th UIT Heat Transfer Conference was organized by the Department of Industrial Engineering at University of Padova (Italy) and held at Centro Linguistico di Ateneo, Padova, on June 24-26, 2019.The annual UIT Conference, which has grown over time, was held in Padova for the first time since the foundation of this conference.The scope of the conference covers a range of many topics in theoretical, numerical and experimental heat transfer and related areas, ranging from energy efficiency to nuclear plants. This time the UIT Conference included an International Symposium on “Refrigerants: heat transfer and applications”. This Symposium was held on June 26, 2019, which was the first World Refrigeration Day, and was organized in collaboration with CNR, Istituto per le Tecnologie della Costruzione.In this conference edition, 99 papers were contributed plus three keynote lectures. The keynote lectures were given by Srinivas Garimella (Georgia Institute of Technology, USA), Alberto Cavallini (Emeritus professor at University of Padova) and Enrico Nobile (University of Trieste). For the Symposium on Refrigerants, invited lectures were given by Pega Hrnjak (University of Illinois at Urbana-Champaign, USA), Bjorn Palm (Royal Institute of Technology, Sweden), Petter Neksa (Norwegian University of Science and Technology, Norway) and José Miguel Corberan (Universidad Politecnica de Valencia, Spain).These proceedings collects two keynote lectures and 58 papers selected from those presented and discussed during the Conference.The conference was an important occasion to stimulate discussion, improve the understanding of heat transfer and related phenomena, present the state of the art of some topics, discuss emerging trends and promote collaborations.A special thank is due to the Organizing and Scientific Committees, to the Sponsors, to the Reviewers of the papers and to all the Participants.Davide Del Col, Luisa Rossetto and Stefano Bortolin - Editors List of Scientific Committee, Organizing Committee and Sponsors are available in this PDF.

Laser Ultrasonic (LU) technology has emerged as a pivotal non-destructive testing method, offering a unique capability to visualise ultrasonic wavefields and identify defects without causing structural damage. However, challenges arise in certain testing scenarios where direct laser irradiation of the sample surface is hindered, resulting in incomplete LU wavefield datasets. This limitation poses a significant obstacle in accurately assessing material integrity and defect detection. This paper explores the application of Physics-Informed Neural Networks (PINNs) for LU wavefield reconstruction and prediction. PINNs are employed to reconstruct wavefields from incomplete data and predict wavefield behaviour at different time instances. Results demonstrate PINNs’ effectiveness in accurately reconstructing wavefields, with correlation coefficients exceeding 0.94 between reconstructed and actual wavefields. Additionally, PINNs show promise in predicting LU wavefield data, albeit with slightly reduced accuracy beyond the training range. Moreover, PINNs effectively reduce noise in wavefield data, enhancing clarity and reliability. This study lays groundwork for further exploration of PINNs in LU defect detection.

Greetings and welcome to the introduction of the 5th International Conference of Modern Technologies in Agricultural Sciences (5th-ICMTAS), held from April 17th to 18th, 2024, in Najaf, Iraq, hosted by our institution (Faculty of Agriculture, University of Kufa, Iraq). This conference served as a crucial platform for discussing important topics in the field of modern agricultural technology. The event witnessed the participation of over 1000 researchers, presenting a total of 711 research papers. After a rigorous evaluation process conducted by professional scientific reviewers, 483 high-quality research papers were accepted for presentation, covering a wide range of topics in agricultural technology. Due to the large number of participants in the conference, it was organized in stages. The first day began with the morning session, which served as the opening ceremony of the conference. Participants were welcomed into the large auditorium of our university, where introductory remarks were delivered, and speakers discussed contemporary topics related to the conference and the latest advancements in agricultural technology and modern environment, along with methods for their future improvement. Following the opening session, participants were divided into large rooms, with each room dedicated to a specific conference theme. Each session was chaired by a session chair and two members, where each researcher was allocated 10 minutes to present a summary of their research and the latest findings they had reached. An additional 10 minutes were allotted for discussion among the attendees. The conference continued for two full days to accommodate the extensive program and to ensure the completion of all scheduled activities. We extend our sincere gratitude to the team at the IOP Conference Series: Earth and Environmental Science for their generous support and sponsorship of this significant event. Their efforts greatly contributed to the success of the conference and enhanced its reputation as a leading platform for knowledge exchange and collaboration in the field of agricultural technology. We aspire for this conference to serve as a catalyst for further scientific cooperation and exchange among researchers and experts in the field of modern agricultural technology. We hope to see the innovative and exciting outcomes of these research efforts contributing to the advancement of the agricultural sector and the achievement of sustainable development worldwide. Welcome once again to the conference, and we look forward to fruitful and insightful discussions and exchanges during the upcoming scientific sessions. Head of the Conference Prof. Dr. Alaa E. Hasan List of Local Scientific Committee, International Scientific Committee, Organizing Committee, Media and Technical Committee and Keynote Speakers are available in this pdf.

The Proceedings of the 4th International Conference on Modern Technologies in Agricultural Sciences (4th-ICMTAS) are encompassed within this Volume. The event was organized by the Faculty of Agriculture at the University of Kufa in Iraq. From September 20th to September 21st, 2023, the city of Kufa in Najaf, Iraq.The primary objective of the Conference was to facilitate the sharing of expertise among prominent specialists in the domains of high-tech geochemical, geological, geophysical, and information technologies in various sectors such as agriculture, energy, oil and gas engineering, environmental management and engineering, mining, and soil processing technologies. Additionally, the conference aimed to explore contemporary areas of biodiversity research and conservation methods for sustainable development. It also sought to examine the environmental impact of food production and sustainable systems of food technologies. Other topics of interest included agroforestry, environmental safety, green technologies, and the management of natural resources.The Conference was structured according to the following guidelines:The academic disciplines encompassed in this list include ecology, plant protection, horticulture and forest ecology, agronomy and medicinal plants, food technology and sustainability of food security, sustainability of animal production techniques, sustainability of soil and water resources, agricultural mechanization techniques, and renewable energy resources, as well as techniques of agricultural economic and social sciences.The primary objectives of the conference were to offer lecturers and researchers from across Iraq a platform to disseminate their research on an international scale, engage in discussions pertaining to technological advancements and innovative engineering solutions in the fields of farming and irrigation, and contribute to the global academic community by providing open access information on the current state of agriculture in Iraq.A total of 722 submissions were submitted by scientists and practitioners from Iraq as well as international contributors.All of the papers underwent a rigorous process of peer assessment. Consequently, a total of 542 submissions were chosen for publishing. The present proceedings provide readers with an overview of recent advancements in various areas of study, including agricultural machinery, green energy systems, biosystems engineering and waste management, digital technologies in agriculture, food storage and processing, tillage and reclamation technologies, and natural resources.The IOP Conference Series: Earth and Environmental Science (EES) was selected as the platform for authors to publish their works in a globally recognized publication that undergoes rigorous peer review. The aforementioned statement is highly regarded by all attendees of our conference.We would like to express our sincere gratitude to the Chairman, the distinguished keynote speakers, as well as all the participants. We also want to thank the publisher for publishing the proceedings. May the readers could enjoy the gain some valuable knowledge from it. We are expecting more and more experts and scholars from all over the world to join this international event next year.List of committees for 4th International Conference of Modern Technologies in Agricultural Sciences (4th-ICMTAS), Local Scientific Committee, International Scientific Committee, Organizing Committee, Media and Technical Committee, Keynote Speakers are available in the pdf.

The transport safety is a key factor in the rail field and to ensure it the monitoring of train components structural integrity must be performed regularly and following strict regulations. Consequently, the development of Non-Destructive Testing (NDT) procedures is a topic of great interest and impact, it aiming at the early identification of cracks and inhomogeneities on train axle and wheels which propagation can causes faults and accidents undermining the passenger and crew safety. Ultrasound based nondestructive testing is currently applied in ordinary maintenance procedures, although they are applied to axle and wheels dismounted from the train wheelset. In fact, the technique requires ultrasonic probes to be in contact with the object under test and therefore the fretting surface between wheel and axle, where fatigue phenomenon induces cracks enucleation and propagation, cannot be monitored. The possibility of applying NDT systems to the whole wheelset, without dismounting it in its components, will allow drastically reducing the inspection time and increasing the inspection frequency. The present paper proposes a feasibility study for the development of a Laser-Ultrasonic Testing (LUT) procedure to improve performances of train wheelset ultrasonic inspection. The method exploits one or an array of air-coupled ultrasonic probes, which detects ultrasonic waves generated by a high-energy pulsed laser. Thanks to the non-contact nature of both the response measurement sensor and the excitation system, the experimental set-up is extremely flexible and it allows extremely speeding up the inspection time.

At GR17 in Dublin in 2004, it was decided to hold GR18 in Sydney in 2007. Every six years, the GR conference (held every three years) and Amaldi meeting (held every two years) occur in the same year around July. This was to be the case in 2007. By mutual agreement of the International Society on General Relativity and Gravitation (ISGRG), which oversees the GR conferences and The Gravitational Wave International Committee (GWIC), which oversees the Amaldi meetings, it was decided to hold these two important conferences concurrently, for the first time, at the same venue, namely Sydney. At a time when the gravitational wave community was beginning to explore the possibility of searches to probe various aspects of the theory, the vision was to bring that community together with the community of gravitational theorists in order to better appreciate the work being done by both parties and to explore possibilities for future research using the mutual expertise.

TWIP steel has the characteristics of high elongation and high tensile strength at room temperature, and therefore it is widely used in the automobile manufacturing industry. Since the grain size has a very important influence on its mechanical properties and corrosion resistance it is significant to study the average grain size of TWIP steel. In this experiment, the specimens were heated to 700~1000°C and preserved for one hour, and the recrystallized structures with different average grain sizes were obtained. All the samples were tested by laser ultrasonic experimental platform and the standard sample was selected. Then the attenuation coefficients of remaining samples were compared with the standard samples by conventional methods. The results showed that the larger the difference between the average grain size of the test sample and the standard sample is, the greater the error of the test will be. The new evaluation model was established by the improved method, and the prediction error was reduced to 5.44~11.61%, which proved the effectiveness of the new method. In addition, laser ultrasonic testing has the advantages of high efficiency and no damage compared with traditional methods.

35th UIT (Italian Union of Thermo-fluid dynamics) Heat Transfer Conference – Ancona (Italy) 26-28 June 2017PrefaceThe 35th UIT (Italian Union of Thermp-Fluid Dynamics) Heat Transfer Conference was organized by Dept. of Industrial Engineering and Mathematical Sciences, Marche Polytechnic University (Itay) and was held at Faculty of Engineering of the same University, Ancona, June 26-28, 2017.The annual UIT Conference, which has grown over time, comes back in Ancona after 27 years.The scope of the conference covers a range of major topics in theoretical, numerical and experimental heat transfer and related areas, ranging from energy efficiency to nuclear plants. The Organizing Committee was also honored to continue the initiative about the new section devoted to Technical Seminars introduced 2015 within UIT conferences. In particular a seminar regarding the adoption of Unmanned Aerial Vehicles for Thermo-Fluid Dynamics research was held. Moreover a photo exhibition supported by “Aeronanutica Militare Italiana” was also offered to the participants.In this conference edition, 73 papers were contributed by about 300 authors on eight different topics: micro and nano scale thermo-fluid dynamics; multi-phase fluid dynamics, heat transfer and interface phenomena; computational fluid dynamics and heat transfer; heat transfer in nuclear plants; heat transfer and efficiency in energy systems, environmental technologies and buildings; natural, forced and mixed convection; conduction; heat transfer in fire engineering.The conference program scheduled plenary, oral and poster sessions. The two invited plenary Keynote Lectures were given by Prof. Giovanni Latini (Marche Polytechnic University, Italy) and Prof. Peter Stephan (Technische Universitat Darmstadt, Germany). A Technical Seminar was given by Prof. Renato Ricci (Marche Polytechnic University, Italy). There were also 9 oral sessions and a poster sessions.This special issue collects a paper presented in a keynote lecture plus 56 papers selected from those presented and discussed during the congress.The UIT 2017 conference was a useful occasion to stimulate discussion, further the understanding of heat transfer and related phenomena, present the state-of-the-art of some topics, discuss emerging trends and promote collaborations. We hope this issue will maintain and extend some of these features.A special thank you is due to the Organizing and Scientific Committees, to the sponsors and to all the participants.Renato Ricci and Valerio D’Alessandro, editors.List of Scientific Committee, Organizing Committee, UIT Sterring Committee, UIT Accounting Auditors, UIT Conferences are available in this pdf.