A Highly Accurate and Efficient Analytical Approach to Bridge Deck Free Vibration Analysis by D.J. Gorman, L. Garibaldi

“…The superposition method is employed to obtain an accurate analytical type solution for the free vibration frequencies and mode shapes of multi-span bridge decks. …”
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An Improved Fourier Series Method for the Free Vibration Analysis of the Three-Dimensional Coupled Beams by Runze Zhang, Yipeng Cao, Wenping Zhang, Hongbo Li, Xiangmei Li

“…This paper presents a free vibration analysis of three-dimensional coupled beams with arbitrary coupling angle using an improved Fourier method. …”
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Library legislation and free access to information as new topics in library and information science education.

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Free Vibration Analysis of Arbitrary-Shaped Plates Based on the Improved Rayleigh–Ritz Method by Wenjie Guo, Qingsong Feng

“…In this investigation, an improved Rayleigh–Ritz method is put forward to analyze the free vibration characteristics of arbitrary-shaped plates for the traditional Rayleigh–Ritz method which is difficult to solve. …”
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Erratum to “Bubble Bursting and Drainage Characteristics at the Free Surface of a Liquid Pool with an Aerosol” by Xiang Yu, Haifeng Gu, Weikai Yin, Qingyang Sun

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The Prominence Value of the Temporal Anchor of Free Indirect Discourse: A Comparison with the Perspectival Center by Jakob Egetenmeyer

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Effects of Zinc-Free Processing Aids on Silica-Reinforced Tread Compounds for Green Tires by Nam Chul Kim, Sung Ho Song

“…However, because zinc is a heavy metal, zinc-free processing aids (ZFAs) are required to satisfy worldwide environmental concerns. …”
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Mechanisms of lignin degradation and persistent free radical formation under light or thermal exposure by Jianghui Yun, Qiuting Yang, Guorui Liu

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An endeavor for excellent and aberration-free vision in advanced keratoconus: Penetrating or deep anterior keratoplasty? by Shilpa Dike Joshi, Nikita Vilas Gundecha

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Facilitating free travel in the Schengen area—A position paper by the European Association for Biometrics by Christoph Busch, Farzin Deravi, Dinusha Frings, Els Kindt, Ralph Lessmann, Alexander Nouak, Jean Salomon, Mateus Achcar, Fernando Alonso‐Fernandez, Daniel Bachenheimer, David Bethell, Josef Bigun, Matthew Brawley, Guido Brockmann, Enrique Cabello, Patrizio Campisi, Aleksandrs Cepilovs, Miles Clee, Mickey Cohen, Christian Croll, Andrzej Czyżewski, Bernadette Dorizzi, Martin Drahansky, Pawel Drozdowski, Catherine Fankhauser, Julian Fierrez, Marta Gomez‐Barrero, Georg Hasse, Richard Guest, Ekaterina Komleva, Sebastien Marcel, Gian Luca Marcialis, Laurent Mercier, Emilio Mordini, Stefance Mouille, Pavlina Navratilova, Javier Ortega‐Garcia, Dijana Petrovska, Norman Poh, Istvan Racz, Ramachandra Raghavendra, Christian Rathgeb, Christophe Remillet, Uwe Seidel, Luuk Spreeuwers, Brage Strand, Sirra Toivonen, Andreas Uhl

“…From the responses received, this position paper was composed to identify ideas to re‐establish free travel between the member states in the Schengen area. …”
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ITO-Free Semitransparent Organic Solar Cells Based on Silver Thin Film Electrodes by Zhizhe Wang, Chunfu Zhang, Dazheng Chen, Shi Tang, Jincheng Zhang, Li Sun, Ting Heng, Yue Hao

“…ITO-free semitransparent organic solar cells (OSCs) based on MoO3/Ag anodes with poly(3-hexylthiophene) and [6,6]-phenyl-C61-butyric acid methyl ester films as the active layer are investigated in this work. …”
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Illustrated Key to the Genera of Free-Living Marine Nematodes in the Superfamily Chromadoroides Exclusive of the Chromadoridae by Armen C. Tarjan, Edwin J. Keppner

“… This is an illustrated key to 55 genera of free-living marine nematodes of the superfamily Chromadoroidea, exclusive of the Chromadoridae, (Nematoda: Chromadorida: Chromadorina). …”
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Metal-Free Synthesis of α-H Chlorine Alkylaromatic Hydrocarbons Driven by Visible Light by Lidia De Luca, Luca Ledda, Andrea Porcheddu, Massimo Carraro, Luisa Pisano, Silvia Gaspa

“…This methodology is a valid alternative to the syntheses previously reported in the literature. It is a metal-free process and does not involve the use of additives or radical initiators.…”
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First records of the European free-tailed bat Tadarida teniotis (Rafinesque, 1814) in Slovenia by Primož Presetnik, Ali Šalamun

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A Class of Three-Step Derivative-Free Root Solvers with Optimal Convergence Order by F. Soleymani, S. Karimi Vanani, M. Jamali Paghaleh

“…Moreover, the class is free from derivative calculation per full iteration, which is important in engineering problems. …”
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Erratum: State of the literature discussing smoke-free policies globally: A narrative review by European Publishing Production Team

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Quantum GIS (QGIS): An introduction to a free alternative to more costly GIS platforms by Jeffry M. Flenniken, Steven Stuglik, Basil V. Iannone

“…Iannone III and published by the UF/IFAS School of Forest Resources and Conservation introduces the reader to a free GIS software package called Quantum GIS (QGIS), walking the reader through simple GIS processes that can be used to visualize spatial patterns of importance to a variety of fields, including natural resources, agriculture, and urban planning. …”
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Self-Correction in Free-Running Dual-Comb Spectroscopy With Varying Interferogram Refresh Rates by Xiangze Ma, Wei Long, Jie Cheng, Yujia Ji, Teng Huang, Dijun Chen

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Cell-free DNA: a metabolic byproduct with diagnostic and prognostic potential in rheumatic disorders by Fancheng Liu, Fancheng Liu, Yazhen Su, Yazhen Su, Xinling Liu, Li Zhao, Li Zhao, Zewen Wu, Zewen Wu, Yang Liu, Yang Liu, Liyun Zhang, Liyun Zhang

“…The release of intracellular DNA into the extracellular area occurs via two pathways: cell death and active secretion by cells. The DNA, which is free in the extracellular space, is commonly known as Cell-Free DNA (cfDNA). …”
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Donor-derived cell-free DNA for detection of acute rejection in lung transplant recipients by Gökce Yavuz, Julia Walter, Julia Walter, Kaimo Hirv, Oliver Wachter, Andrea Dick, Julia Kovacs, Julia Zimmermann, Olaf M. Glueck, Maximilian Vorstandlechner, Nicole Samm, Jan M. Fertmann, Wulf Sienel, Sebastian Michel, Sebastian Michel, Michael Irlbeck, Nikolaus Kneidinger, Nikolaus Kneidinger, Nikolaus Kneidinger, Rudolf Hatz, Rudolf Hatz, Jürgen Behr, Jürgen Behr, Christian Schneider, Christian Schneider, Teresa Kauke, Teresa Kauke

“…This study aims to explore the potential utility of donor-derived cell-free DNA (ddcfDNA) as a non-invasive biomarker for detecting acute rejection in lung transplant recipients (LTR).MethodsWe developed a molecular method based on digital droplet PCR to determine the total amount and the proportion of ddcfDNA. …”
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