Announcements

1. “Review of Current Guided Wave Ultrasonic Testing (GWUT) Limitations and Future Directions”
by Samuel Chukwuemeka Olisa, Muhammad A. Khan and Andrew Starr
Sensors 2021, 21(3), 811; https://doi.org/10.3390/s21030811
Available online: https://www.mdpi.com/1424-8220/21/3/811

2. “A Deep Neural Network-Based Feature Fusion for Bearing Fault Diagnosis”
by Duy Tang Hoang, Xuan Toa Tran, Mien Van and Hee Jun Kang
Sensors 2021, 21(1), 244; https://doi.org/10.3390/s21010244
Available online: https://www.mdpi.com/1424-8220/21/1/244

3. “Serial MTJ-Based TMR Sensors in Bridge Configuration for Detection of Fractured Steel Bar in Magnetic Flux Leakage Testing”
by Zhenhu Jin, Muhamad Arif Ihsan Mohd Noor Sam, Mikihiko Oogane and Yasuo Ando
Sensors 2021, 21(2), 668; https://doi.org/10.3390/s21020668
Available online: https://www.mdpi.com/1424-8220/21/2/668

4. “Chiroptical Metasurfaces: Principles, Classification, and Applications”
by Joohoon Kim, Ahsan Sarwar Rana, Yeseul Kim, Inki Kim, Trevon Badloe, Muhammad Zubair, Muhammad Qasim Mehmood and Junsuk Rho
Sensors 2021, 21(13), 4381; https://doi.org/10.3390/s21134381
Available online: https://www.mdpi.com/1424-8220/21/13/4381

5. “A High-Resolution Reflective Microwave Planar Sensor for Sensing of Vanadium Electrolyte”
by Nazli Kazemi, Kalvin Schofield and Petr Musilek
Sensors 2021, 21(11), 3759; https://doi.org/10.3390/s21113759
Available online: https://www.mdpi.com/1424-8220/21/11/3759

6. “An Estimation Method of Continuous Non-Invasive Arterial Blood Pressure Waveform Using Photoplethysmography: A U-Net Architecture-Based Approach”
by Tasbiraha Athaya and Sunwoong Choi
Sensors 2021, 21(5), 1867; https://doi.org/10.3390/s21051867
Available online: https://www.mdpi.com/1424-8220/21/5/1867

7. “Sensors and Measurements for Unmanned Systems: An Overview”
by Eulalia Balestrieri, Pasquale Daponte, Luca De Vito and Francesco Lamonaca
Sensors 2021, 21(4), 1518; https://doi.org/10.3390/s21041518
Available online: https://www.mdpi.com/1424-8220/21/4/1518

8. “MoS2 Based Photodetectors: A Review”
by Alberto Taffelli, Sandra Dirè, Alberto Quaranta and Lucio Pancheri
Sensors 2021, 21(8), 2758; https://doi.org/10.3390/s21082758
Available online: https://www.mdpi.com/1424-8220/21/8/2758

9. “Flexural Damage Diagnosis in Reinforced Concrete Beams Using a Wireless Admittance Monitoring System—Tests and Finite Element Analysis”
by Constantin E. Chalioris, Violetta K. Kytinou, Maristella E. Voutetaki and Chris G. Karayannis
Sensors 2021, 21(3), 679; https://doi.org/10.3390/s21030679
Available online: https://www.mdpi.com/1424-8220/21/3/679

10. “Review on Conductive Polymer/CNTs Nanocomposites Based Flexible and Stretchable Strain and Pressure Sensors”
by Olfa Kanoun, Ayda Bouhamed, Rajarajan Ramalingame, Jose Roberto Bautista-Quijano, Dhivakar Rajendran and Ammar Al-Hamry
Sensors 2021, 21(2), 341; https://doi.org/10.3390/s21020341
Available online: https://www.mdpi.com/1424-8220/21/2/341

1. “Recent Advances in Enzymatic and Non-Enzymatic Electrochemical Glucose Sensing”
by Mohamed H. Hassan, Cian Vyas, Bruce Grieve and Paulo Bartolo
Sensors 2021, 21(14), 4672; https://doi.org/10.3390/s21144672
Available online: https://www.mdpi.com/1424-8220/21/14/4672

2. “A Review on Functionalized Graphene Sensors for Detection of Ammonia”
by Xiaohui Tang, Marc Debliquy, Driss Lahem, Yiyi Yan and Jean-Pierre Raskin
Sensors 2021, 21(4), 1443; https://doi.org/10.3390/s21041443
Available online: https://www.mdpi.com/1424-8220/21/4/1443

3. “An Outlook of Recent Advances in Chemiresistive Sensor-Based Electronic Nose Systems for Food Quality and Environmental Monitoring”
by Alishba T. John, Krishnan Murugappan, David R. Nisbet and Antonio Tricoli
Sensors 2021, 21(7), 2271; https://doi.org/10.3390/s21072271
Available online: https://www.mdpi.com/1424-8220/21/7/2271

4. “Identification of the Olfactory Profile of Rapeseed Oil as a Function of Heating Time and Ratio of Volume and Surface Area of Contact with Oxygen Using an Electronic Nose”
by Robert Rusinek, Dominik Kmiecik, Marzena Gawrysiak-Witulska, Urszula Malaga-Toboła, Sylwester Tabor, Pavol Findura, Aleksander Siger and Marek Gancarz
Sensors 2021, 21(1), 303; https://doi.org/10.3390/s21010303
Available online: https://www.mdpi.com/1424-8220/21/1/303

5. “Fiber-Optic Localized Surface Plasmon Resonance Sensors Based on Nanomaterials”
By Seunghun Lee, Hyerin Song, Heesang Ahn, Seungchul Kim, Jong-ryul Choi and Kyujung Kim
Sensors 2021, 21(3), 819; https://doi.org/10.3390/s21030819
Available online: https://www.mdpi.com/1424-8220/21/3/819

6. “Preparation and Research of a High-Performance ZnO/SnO₂ Humidity Sensor”
by Fan Li, Peng Li and Hongyan Zhang
Sensors 2022, 22(1), 293; https://doi.org/10.3390/s22010293
Available online: https://www.mdpi.com/1424-8220/22/1/293

7. “Molecularly Imprinted Polymer-Based Sensors for Priority Pollutants”
by Mashaalah Zarejousheghani, Parvaneh Rahimi, Helko Borsdorf, Stefan Zimmermann and Yvonne Joseph
Sensors 2021, 21(7), 2406; https://doi.org/10.3390/s21072406
Available online: https://www.mdpi.com/1424-8220/21/7/2406

8. “Recent Advances in Quenchbody, a Fluorescent Immunosensor”
by Jinhua Dong and Hiroshi Ueda
Sensors 2021, 21(4), 1223; https://doi.org/10.3390/s21041223
Available online: https://www.mdpi.com/1424-8220/21/4/1223

9. “Electrochemical Sensors Based on the Electropolymerized Natural Phenolic Antioxidants and Their Analytical Application”
by Guzel Ziyatdinova, Ekaterina Guss and Elvira Yakupova
Sensors 2021, 21(24), 8385; https://doi.org/10.3390/s21248385
Available online: https://www.mdpi.com/1424-8220/21/24/8385

10. “Nanomaterial-Integrated Cellulose Platforms for Optical Sensing of Trace Metals and Anionic Species in the Environment”
by Carlos Bendicho, Isela Lavilla, Francisco Pena-Pereira, Inmaculada de la Calle and Vanesa Romero
Sensors 2021, 21(2), 604; https://doi.org/10.3390/s21020604
Available online: https://www.mdpi.com/1424-8220/21/2/604

1. “Rapid SARS-CoV-2 Detection Using Electrochemical Immunosensor”
by Biljana Mojsoska, Sylvester Larsen, Dorte Aalund Olsen, Jonna Skov Madsen, Ivan Brandslund and Fatima AlZahra’a Alatraktchi
Sensors 2021, 21(2), 390; https://doi.org/10.3390/s21020390
Available online: https://www.mdpi.com/1424-8220/21/2/390

2. “Biosensors Based on Isothermal DNA Amplification for Bacterial Detection in Food Safety and Environmental Monitoring”
by Sandra Leonardo, Anna Toldrà and Mònica Campàs
Sensors 2021, 21(2), 602; https://doi.org/10.3390/s21020602
Available online: https://www.mdpi.com/1424-8220/21/2/602

3. “Reduced Graphene Oxide and Polyaniline Nanofibers Nanocomposite for the Development of an Amperometric Glucose Biosensor”
by Anton Popov, Ruta Aukstakojyte, Justina Gaidukevic, Viktorija Lisyte, Asta Kausaite-Minkstimiene, Jurgis Barkauskas and Almira Ramanaviciene
Sensors 2021, 21(3), 948; https://doi.org/10.3390/s21030948
Available online: https://www.mdpi.com/1424-8220/21/3/948

4. “Advances in Plant Disease Detection and Monitoring: From Traditional Assays to In-Field Diagnostics”
by Ilaria Buja, Erika Sabella, Anna Grazia Monteduro, Maria Serena Chiriacò, Luigi De Bellis, Andrea Luvisi and Giuseppe Maruccio
Sensors 2021, 21(6), 2129; https://doi.org/10.3390/s21062129
Available online: https://www.mdpi.com/1424-8220/21/6/2129

5. “Recent Advancements in Enzyme-Based Lateral Flow Immunoassays”
by Donato Calabria, Maria Maddalena Calabretta, Martina Zangheri, Elisa Marchegiani, Ilaria Trozzi, Massimo Guardigli, Elisa Michelini, Fabio Di Nardo, Laura Anfossi, Claudio Baggiani et al.
Sensors 2021, 21(10), 3358; https://doi.org/10.3390/s21103358
Available online: https://www.mdpi.com/1424-8220/21/10/3358

6. “Carbon Nanotube Field-Effect Transistor-Based Chemical and Biological Sensors”
by Xuesong Yao, Yalei Zhang, Wanlin Jin, Youfan Hu and Yue Cui
Sensors 2021, 21(3), 995; https://doi.org/10.3390/s21030995
Available online: https://www.mdpi.com/1424-8220/21/3/995

7. “Deep Eutectic Solvents (DESs) and Their Application in Biosensor Development”
by Rossella Svigelj, Nicolò Dossi, Cristian Grazioli and Rosanna Toniolo
Sensors 2021, 21(13), 4263; https://doi.org/10.3390/s21134263
Available online: https://www.mdpi.com/1424-8220/21/13/4263

8. “Genetically Encoded Biosensors Based on Fluorescent Proteins”
by Hyunbin Kim, Jeongmin Ju, Hae Nim Lee, Hyeyeon Chun and Jihye Seong
Sensors 2021, 21(3), 795; https://doi.org/10.3390/s21030795
Available online: https://www.mdpi.com/1424-8220/21/3/795

9. “Emergent Biosensing Technologies Based on Fluorescence Spectroscopy and Surface Plasmon Resonance”
by Alessandra Camarca, Antonio Varriale, Alessandro Capo, Angela Pennacchio, Alessia Calabrese, Cristina Giannattasio, Carlos Murillo Almuzara, Sabato D’Auria and Maria Staiano
Sensors 2021, 21(3), 906; https://doi.org/10.3390/s21030906
Available online: https://www.mdpi.com/1424-8220/21/3/906

10. “Forecasting of Glucose Levels and Hypoglycemic Events: Head-to-Head Comparison of Linear and Nonlinear Data-Driven Algorithms Based on Continuous Glucose Monitoring Data Only”
by Francesco Prendin, Simone Del Favero, Martina Vettoretti, Giovanni Sparacino and Andrea Facchinetti
Sensors 2021, 21(5), 1647; https://doi.org/10.3390/s21051647
Available online: https://www.mdpi.com/1424-8220/21/5/1647

On 9 February 2023, Clarivate, a global leader in providing trusted insights and analytics, added the Preprint Citation Index to the Web of Science platform, streamlining the research process by allowing researchers to locate and link to preprints alongside other trusted content in the database.

The Preprint Citation Index will act as a bridge to connect cutting-edge preprints with peer-reviewed journal articles published within the Web of Science Core Collection. Alerts can be easily set to monitor new research across several repositories and authors will also be able to include preprints on their Web of Science Research Profile to more accurately display their various research outputs.

As of its launch, the Preprint Citation Index will provide nearly two million preprints from various repositories, including MDPI’s own Preprints.org.

MDPI's Preprints Platform – Preprints.org

To advance Open Science and the fast dissemination of research, MDPI offers researchers a free multidisciplinary preprint platform. Preprints.org accepts submissions from all research areas and offers authors high visibility, permanent archiving, article-level Metrics and immediately citable content by assigning a Digital Object Identifier (DOI) to all preprints.

During submission to any MDPI journal, authors have the option to share their research as a preprint. After an initial screening, the manuscript is available online in 48 hours or less. Once online, preprints can be downloaded, shared, commented on, and cited, providing authors maximum visibility.

We invite you to join the ranks of the over 100k researchers using Preprints.org and share your research.

For more information, please visit Preprints.org.

Conference: IEEE International Conference on Robotics and Automation (ICRA 2023)

Date: 29 May–2 June 2023
Place: London, UK

Machines (ISSN: 2075-1702) will be attending ICRA 2023 as an exhibitor. This meeting will take place from 29 May to 2 June 2023 in London, UK.

The largest and most prestigious event of the year in the robotics and automation calendar, the 2023 IEEE International Conference on Robotics and Automation (ICRA) will bring together the world's top academics, researchers, and industry representatives. With the conference taking place in the UK for the first time, London will provide the perfect backdrop to this world-class event.

The following MDPI journals will be represented:

• Machines;
• Sensors;
• Actuators;
• Applied Sciences;
• Electronics;
• Robotics;
• Systems;
• JSAN;
• Technologies;
• Inventions;
• Designs;
• Drones;
• JMMP;
• Telecom;
• AI;
• Automation.

If you are planning to attend this conference, please do not hesitate to start an online conversation with us. Our delegates look forward to meeting you in person and answering any questions that you may have. For more information about the conference, please visit the following website: https://www.icra2023.org/.

This Season's Greetings video is from the Section Editor-in-Chief of the “Nanosensors” Section, Dr. Edgar Muñoz, who is a professor at the Universitat Rovira i Virgili, Spain.

The "Nanosensors" Section was established in 2020; it publishes high-quality, original, peer-reviewed papers covering all aspects of nanosensors and microsensors, including the design of the structure and composition of sensing materials, improvement of existing micro-/nanosensors, exploration of new sensing concepts and techniques, and various applications of the micro-/nanosensors.

We welcome high-quality original research papers and reviews. The topics include, but are not limited to:

• Nanosensors and devices; microsensors and devices;
• Nanoprobes;
• Micro-/nanoscale photodetectors;
• Micro-/nanorobotic drug delivery;
• Sensing and detection in theranostics;
• Sensors based on nanomaterials;
• Sensors based on two-dimensional materials;
• Sensing mechanisms;
• Nanophotonics;
• Micro-/nano-chip; lab-on-a-chip sensor devices;
• MEMS; NEMS; bioMEMS/NEMS;
• Microfluidics and nanofluidics;
• Nano-optics and nanospectroscopy;
• Microplasma devices;
• Electronic skin;
• Flexible sensors;
• Strain sensors;
• Capacitive and pressure sensors;
• Nano energy.

Prof. Dr. Eduard Llobet

Editor-in-Chief of “Chemical Sensors” Section.

Prof. Dr. Elisabetta Comini

Section Associate Editor of “Chemical Sensors” Section.

This Season's Greetings video is from the Section Editor-in-Chief of the "Chemical Sensors" Section, Prof. Dr. Eduard Llobet, who is a professor at Universitat Rovira i Virgili, and Section Associate Editor Prof. Dr. Elisabetta Comini, who is from the University of Brescia. The "Chemical Sensors" Section was established in 2010. The Section publishes original peer-reviewed papers covering all aspects of chemical sensors. This includes new developments and recent improvements in the design, synthesis, and performance evaluation of materials for sensitive layers and transducers; the study of their sensing mechanisms; the evaluation, processing approaches, and applications of chemical sensors; and the driving electronics, data processing, and chemical sensor array chemometrics.

This Season's Greetings video is from the Section Editor-in-Chief of the "Sensor Materials" Section, Dr. Mikhael Bechelany, who is a professor at the University of Montpellier, France.

The "Sensor Materials" Section was established in 2018, and this Section covers all aspects related to the materials of sensors and their relevant fields. In particular, it considers sensors where the transduction of sensing is obtained by exploiting some specific property of the used materials, and/or where advanced, smart, engineered, special, tailored, or exotic materials are utilized for transduction. The Section will also include sensors and measurements systems applied to the characterization of specific material properties. The "Sensors Materials" Section will include sensors based on (without being limited to) the following classes of materials: semiconducting materials, ceramic materials, metallic materials, organic materials, piezoelectric materials, two-dimensional materials, nanomaterials, biomaterials and biologically derived materials, metal–organic frameworks, soft materials, metamaterials, and chromogenic materials.

This Season's Greetings video is from the Section Board Member of “Electronic Sensors” Section of Sensors (ISSN: 1424-8220), Prof. Dr. Pak Kwong Chan, from Nanyang Technological University, China.

The "Electronic Sensors" Section was established in 2019. This Section addresses the electronic components that are part of devices used to measure a physical quantity, such as temperature, humidity, pressure, light, distance, acceleration, loudness, or other physical quantities, and convert it into an electrical signal. Submitted papers should focus on the design of innovative electrical and electronic circuitry configurations for the development of sensor systems, including interfaces, chips, SoC implementations, etc. Novel approaches for smart sensors and advances in electronic transduction mechanisms, enabling enhancements in selectivity, sensitivity, signal-to-noise ratio, dynamic range, miniaturization, as well as the detection of novel measurands, fall within the scope of this Section.

Prof. Dr. Xianbin Wang

Editor-in-Chief of the “Communications” Section

Prof. Dr. Peter Han Joo Chong

Section Associate Editor of the “Communications” Section

This Season’s Greetings video is from the Section Editor-in-Chief of the “Communications” Section, Prof. Dr. Xianbin Wang, who is the professor at Western University, and the Section Associate Editor Prof. Dr. Peter Han Joo Chong, who is from the Auckland University of Technology. The “Communications” Section of Sensors (ISSN: 1424-8220) was established in 2020 and publishes original peer-reviewed papers covering all aspects of the communications field, including, but not limited to, the design, implementation, and theoretical analysis of wireless communication, optical communication, and satellite communication systems; signal processing techniques; networking, data analytics; system operation; and emerging communication technologies.