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Preprint ARTICLE | doi:10.20944/preprints202203.0382.v1

The Characteristic of CFRP Laminates Related to Water Absorption Subjected to Tensile, Bending, and Compression

Sudarisman Sudarisman, Alfian Hidayat, Haniel Haniel, Muhammad Tiopan, Rela Adi Himarosa, Muhammad Akhsin Muflikhun

Subject: Engineering, Mechanical Engineering Keywords: CFRP; vacuum infusion; water absorption; tensile test; bending test; compressive test

Online: 29 March 2022 (12:22:53 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1918.v1

A Novel Image Compression Method Based on Coordinated Group Signal Transformation

Ekaterina Lopukhova, Grigory Voronkov, Igor Kuznetsov, Vladislav Ivanov, Ruslan Kutluyarov, Elizaveta Grakhova

Subject: Engineering, Telecommunications Keywords: energy-efficient coding; differential coding; coordinated group signal transformation; image compression; image quality criteria; neural networks

Online: 30 April 2024 (11:30:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.1220.v2

Hydrogen Gas Compression for Efficient Storage: Balancing Energy and Density

Alessandro Franco, Caterina Giovannini

Subject: Engineering, Energy And Fuel Technology Keywords: Hydrogen storage; Gaseous Compression; Multi-Stage Configuration; Energy analysis; Efficiency

Online: 25 April 2024 (10:39:10 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1391.v1

Compression After Impact Response of Kevlar Composites

Dionysios E Mouzakis, Panagiotis J Charitidis, Stefanos Zaoutsos

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: compression after impact; kevlar; finite element analysis; c-scan.

Online: 20 June 2024 (10:05:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.1958.v1

A Universal Image Compression Sensing-Encryption Algorithm Based on DNA-Triploid Mutation

Yinghong Cao, Linlin Tan, Xianying Xu, Bo Li

Subject: Computer Science And Mathematics, Applied Mathematics Keywords: privacy protection; DNA-triploid mutation; compression sensing; image encryption

Online: 29 May 2024 (14:20:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1359.v1

Graph Stream Compression Scheme Based on Pattern Dictionary Using Provenance

Hyeonbyeong Lee, Bokyoung Shin, Dojin Choi, Jongtae Lim, Kyoungsoo Bok, Jaesoo Yoo

Subject: Computer Science And Mathematics, Computer Science Keywords: Graph stream; Graph compression; Provenance data; Pattern dictionary; FP-tree

Online: 19 April 2024 (15:53:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0725.v1

A Novel Nano-Laminated GdB2C2 with Excellent Electromagnetic Wave Absorption Performance and Ultra-High Temperature Thermostability

Longfei Jiang, Gang Qin, Pengxing Cui, Guoqing Wang, Xiaobing Zhou

Subject: Chemistry And Materials Science, Ceramics And Composites Keywords: GdB2C2; ternary layered materials; electromagnetic wave absorption; ultra-high temperature ceramic

Online: 13 May 2024 (09:10:36 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.0897.v1

A Study of {10–12} Twinning Activity Associated with Stress State in Mg-3Al-1Zn Alloy during Compression

Boqin Lu, Wei Wang, Jinyi Yao, Liping Deng, Lei Xiao, Bingshu Wang

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: AZ31 magnesium alloy; local strain state; twin variants selection; Schmid factor; strain compatibility factor

Online: 16 February 2024 (11:03:22 CET)

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Preprint REVIEW | doi:10.20944/preprints202403.1272.v1

Unveiling the Future of Human and Machine Coding: A Survey of End-to-End Learned Image Compression

Chen-Hsiu Huang, Ja-Ling Wu

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: Deep learning; image compression; video coding; neural compression; coding for machines

Online: 21 March 2024 (11:51:16 CET)

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Preprint ARTICLE | doi:10.20944/preprints202102.0297.v1

Comparison of Intermittent Pneumatic Compression Device and Compression Stockings for Workers with Leg Edema and Pain after Prolonged Standing

Da-Sol Kim, Yu Hui Won, Myoung-Hwan Ko

Subject: Medicine And Pharmacology, Immunology And Allergy Keywords: Intermittent Pneumatic Compression Devices; Compression Stocking; Edema; Pain; Standing

Online: 12 February 2021 (10:20:28 CET)

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During prolonged standing, insufficient calf muscle pumping accompanies venous stasis and hypertension in the lower legs, resulting in valve dysfunction, venous wall problems, and subsequent inflammation. Compression therapy, which includes medical compression stockings (MCS) and mechanical intermittent pneumatic compression (IPC), is one of the most effective therapeutic interventions for treating chronic venous diseases. This study aimed to investigate the safety and efficacy of IPC and MCS, and the optimal protocol of compression therapy for chronic venous disease. This crossover trial was conducted for healthy, long standing workers (>8 h daily) with leg edema and pain. Four groups were established for each visit: group A (resting after work without MCS), group B (resting after work with MCS), group C (IPC after work without MCS), and group D (IPC after work with MCS). The primary outcome was the visual analogue scale (VAS) score for leg pain. The secondary outcomes were leg volume (mL), circumference (cm), extracellular fluid/total body fluid (ECF/TBF), and extracellular water/total body water (ECW/TBW) through bioimpedance analysis. Outcomes were assessed before work (T0), after work (T1), and 60 minutes after intervention (T2). We included 39 healthy volunteers, aged 30.03±7.56 years. All four groups had significantly increased leg pain after work (T0-1) but improved 60 minutes after intervention (T1-2), particularly group C (decreased VAS by 1.9). When leg swelling was compared at T0 and T1, groups A and C showed significant increases in leg volume and circumference, indicating significant work-induced edema, whereas groups B and D showed no change or even a decrease. After interventions, leg volume and circumference significantly decreased in groups A and C, although groups B and C did not show significant improvement. The ECF/TBF and ECW/TBW of all groups decreased after interventions. Leg pain and edema after prolonged standing in healthy adults were safely and effectively improved by IPC. Although MCS also reduced leg edema immediately after work, it did not show significant improvement in leg pain at T0-1–and T1-2, nor in swelling at T1-2.

Preprint ARTICLE | doi:10.20944/preprints202409.0410.v1

Enhancing Force Absorption, Stress-Strain and Thermal Properties of Weft-Knitted Inlay Spacer Fabric Structures for Apparel Applications

Mei-ying Kwan, Yi-fan Tu, Kit-lun Yick, Joanne Yip, Nga-wun Li, Annie Yu, Ka-wai Lo

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: Cushioning material; Compression evaluation; Inlay knitting; Stretchability

Online: 6 September 2024 (03:49:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0566.v1

Facile Fabrication of Co–Doped Porous Carbon from Coal Hydrogasification Semi-Coke for Efficient Microwave Absorption

Yan-Fang Li, Li-Fang Wang, Shu-juan Gao, Tan-Lai Yu, Qi-Feng Li, Junwei Wang

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: Co/C composites; microwave absorption; dielectric loss; magnetic loss

Online: 9 September 2024 (07:07:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201609.0112.v1

Influence of External Magnetic Field on the Microwave Absorption Properties of Carbonyl Iron and Polychloroprene Composites Film

Haiyan Wang, Xueai Li

Subject: Chemistry And Materials Science, Surfaces, Coatings And Films Keywords: carbonyl iron; composites film; external magnetic field; microwave absorption properties

Online: 28 September 2016 (10:32:52 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201702.0011.v1

Simulation Analysis of Solution Transportation Absorption Chiller with the Capacity from 25 RT to 1000 RT

Koji Enoki, Fumi Watanabe, Seigo Tanaka, Atsushi Akiwawa, Toshitaka Takei

Subject: Engineering, Energy And Fuel Technology Keywords: absorption chiller; thermal energy transportation; solution transportation; ammonia-water; COP; simulation

Online: 4 February 2017 (07:49:12 CET)

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Preprint ARTICLE | doi:10.20944/preprints202406.1521.v1

Exploring the Microstructural Effect of FeCo Alloy on Carbon Microsphere Deposition and Enhanced Electromagnetic Wave Absorption

Xiaoshu Jia, Heng Zhang, Fang Liu, Qiaojun Yi, Chaolong Li, Xiao Wang, Mingxing Piao

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: FeCo@CM composites; laminar-stacked FeCo alloy; MPARCVD technique; electromagnetic wave absorption

Online: 21 June 2024 (16:58:47 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0323.v1

Environmental Impact Evaluation of CO₂ Absorption and Desorption Enhancement by Membrane Gas Absorption: A life Cycle Assessment Study

Fuzhao Li, Yuexia Lv, Jinpeng Bi, Hui Zhang, Wei Zhao, Yancai Su, Tingting Du, Junkun Mu

Subject: Environmental And Earth Sciences, Environmental Science Keywords: CO₂ capture; membrane gas absorption; life cycle assessment; environmental impact

Online: 7 May 2024 (16:40:21 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.2109.v1

From Localized Laser Energy Absorption to Absorption Delocalization at Volumetric Glass Modification with Gaussian and Doughnut-Shaped Pulses

Martin Zukerstein, Vladimir P. Zhukov, Yuri P. Meshcheryakov, Nadezhda M. Bulgakova

Subject: Physical Sciences, Optics And Photonics Keywords: volumetric modification; femtosecond laser pulses; laser processing; fused silica; Maxwell’s equations; thermoelastoplastic modeling; laser-induced shock waves

Online: 30 June 2023 (07:50:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0281.v1

Recovered Foam Impact Absorption Systems

Sara Marcelino-Sádaba, Pablo Benito Hernandez, Miguel Angel Martin Antunes, Pedro Maria Villanueva Roldan, Fernando Veiga

Subject: Engineering, Mechanical Engineering Keywords: foam; impact absorption; recycling; sustainability

Online: 3 September 2024 (16:55:33 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1546.v1

Experimental Evaluation of Mechanical Compression Properties of Aluminum Alloy Lattice Trusses for Anti-ice System Applications

Carlo Giovanni Ferro, Sara Varetti, Paolo Maggiore

Subject: Engineering, Aerospace Engineering Keywords: Additive Manufacturing (AM); Selective Laser Sintering (SLM); Lattice Structures; Design of Experiments (DOE)

Online: 23 April 2024 (16:58:27 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.1113.v1

The Effect of Sample Configuration on the Measurement of the Bending Properties of Extruded Polystyrene Using Three-Point, Four-Point, and Compression Bending Tests

Hiroshi Yoshihara, Masahiro Yoshinobu, Makoto Maruta

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: extruded polystyrene; three-point bending test; four-point bending test; compression bending test; Young’s modulus; proportional limit stress; bending strength

Online: 17 May 2024 (04:17:47 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.1003.v1

Enhanced Energy Absorption in Bioinspired Combined TPMS-Gyroid and Walled TPMS-Gyroid Lattice Structure Manufactured via Fused Filament Fabrication (FFF)

Dawit Bogale Alemayehu, Masahiro Todoh

Subject: Engineering, Mechanical Engineering Keywords: Keywords; bio-inspired; gyroid lattice, Boolean subtraction; finite element analysis; plastic plateau; densification; energy absorption; relative density; size effect

Online: 18 March 2024 (10:39:43 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0793.v1

Dynamics of Absorption and Concentration of Anthracene in Radishes

Haruki Shimazu

Subject: Environmental And Earth Sciences, Environmental Science Keywords: anthracene; radish; absorption; concentration

Online: 12 January 2024 (06:12:05 CET)

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Preprint HYPOTHESIS | doi:10.20944/preprints202307.0077.v1

Syndrome Sinistre: Left Brachiocephalic Vein Compression and its Neurological Manifestations.

Karthikeyan M. Arcot, Vincent S. DeOrchis

Subject: Medicine And Pharmacology, Neuroscience And Neurology Keywords: Venous Outflow Obstruction Brachiocephalic Vein

Online: 3 July 2023 (12:53:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202010.0313.v1

Magnetorheological Elastomer Stress Relaxation Behaviour During Compression: Experiment and Modelling

Mateusz Kukla, Łukasz Warguła, Krzysztof Talaśka, Dominik Wojtkowiak

Subject: Chemistry And Materials Science, Biomaterials Keywords: mechanical properties of advanced materials; magneto-rheological (MR); elastomer; stress relaxation; mathematical model

Online: 15 October 2020 (08:31:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0290.v1

Thermo-Mechanical Uniaxial Compression of 4D Printed PLA in Wide Range of Strain Rates and Temperatures below Glass Transition Temperature T_g

Vukašin Slavković, Blaž Hanželič, Vasja Plesec, Strahinja Milenković, Gregor Harih

Subject: Engineering, Mechanical Engineering Keywords: smart materials; shape memory polymer; 4D printing; thermo-mechanical cycle

Online: 6 May 2024 (12:38:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.1352.v1

Oral Iron Absorption of Ferric Citrate Hydrate and Hepcidin-25 in Hemodialysis Patients: A Prospective, Multicenter, Observational Riona-Oral Iron Absorption Trial

Naohisa Tomosugi, Yoshitaka Koshino, Chie Ogawa, Kunimi Maeda, Noriaki Shimada, Kimio Tomita, Shoichiro Daimon, Tsutomu Shikano, Kazuyuki Ryu, Toru Takatani, Kazuya Sakamoto, Satonori Ueyama, Daisuke Nagasaku, Masato Nakamura, Shibun Ra, Masataka Nishimura, Chieko Takagi, Yoji Ishii, Noritoshi Kudo, Shinsuke Takechi, Takashi Ishizu, Takamoto Yanagawa, Masamichi Fukuda, Yutaka Nitta, Takayuki Yamaoka, Taku Saito, Suzuko Imayoshi, Momoyo Omata, Joji Oshima, Akira Onozaki, Hiroaki Ichihashi, Yasuhisa Matsushima, Hisahito Takae, Ryoichi Nakazawa, Koichi Ikeda, Masato Tsuboi, Keiko Konishi, Shouzaburo Kato, Maki Ooura, Masaki Koyama, Tsukasa Naganuma, Makoto Ogi, Shigeyuki Katayama, Toshiaki Okumura, Shigemi Kameda, Sayuri Shirai

Subject: Medicine And Pharmacology, Urology And Nephrology Keywords: oral iron absorption; ferric citrate hydrate; hemodialysis; hepcidin-25; iron shift

Online: 18 August 2023 (11:20:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.0108.v1

Radiotherapy for Metastatic Epidural Spinal Cord Compression with Increased Doses: Final Results of the RAMSES-01 Trial

Dirk Rades, Darejan Lomidze, Natalia Jankarashvili, Fernando Lopez Campos, Arturo Navarro-Martin, Barbara Segedin, Blaz Groselj, Christian Staackmann, Charlotte Kristiansen, Kristopher Dennis, Steven E. Schild, Jon Cacicedo

Subject: Medicine And Pharmacology, Oncology And Oncogenics Keywords: metastatic epidural spinal cord compression; highly-conformal radiotherapy; increased doses; phase 2 trial; historical control group; local progression-free survival

Online: 4 March 2024 (06:01:20 CET)

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Preprint ARTICLE | doi:10.20944/preprints202310.1305.v1

Compression Behavior and Textures of Ti57-Nb43 Alloy at High Temperatures

Szűcs Máté, Kárpáti Viktor, Tamás Mikó, Laszlo S TOTH

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: titanium-niobium alloy; stress-strain curve; high temperature; simulation; texture; strain rate sensitivity

Online: 20 October 2023 (03:57:53 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202204.0286.v1

Mechanical Property Analysis of Cuttlebone-like Structure under Compression and Shearing

Fan Wu, Bohua Sun

Subject: Physical Sciences, Applied Physics Keywords: Cuttlebone-like structure; Bionic structure; Finite element analysis; 3D Printing; Compression; Shearing

Online: 29 April 2022 (04:06:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201802.0103.v1

Small Satellite Cloud Detection Based On Deep Learning and Image Compression

Zhang Zhaoxiang, Akira Iwasaki, Xu Guodong, Song Jianing

Subject: Environmental And Earth Sciences, Space And Planetary Science Keywords: Cloud detection; Deep learning; Image Compression.

Online: 15 February 2018 (16:49:55 CET)

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Preprint ARTICLE | doi:10.20944/preprints202309.0964.v1

Fuzzy Transform Image Compression in the YUV Space

Barbara Cardone, Ferdinando Di Martino, Salvatore Sessa

Subject: Computer Science And Mathematics, Computer Science Keywords: F-transform; F1-transform; color image compression; RGB space; YUV space.

Online: 14 September 2023 (09:08:57 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202401.1405.v1

Enhancements of Wave Power Absorption with Arrays and a Vertical Breakwater

Fuat Kara

Subject: Engineering, Energy And Fuel Technology Keywords: mean interaction factor; absorbed wave power; multibody interaction; WECs arrays; method of images

Online: 18 January 2024 (13:55:36 CET)

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Preprint ARTICLE | doi:10.20944/preprints202306.1699.v1

Broadband Waterborne Multiphase Metasurface with Simultaneous Wavefront Manipulation and Energy Absorption

An Yi, Han Zou, Aiguo Zhao

Subject: Engineering, Marine Engineering Keywords: metamaterials; pentamode materials; acoustic metasurface; dispersion curve

Online: 25 June 2023 (02:30:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202106.0217.v1

Analysis of Heat Absorption and Collection Based on Solid Structures Collector

Yan Liu, Wenbin Liu, Qing Gao, Yong Huang, Peizhuo Li, Yongzhen Wang

Subject: Engineering, Automotive Engineering Keywords: solar collection; solid structure; heat absorption analysis; collection heat analysis; reflection spectrum

Online: 8 June 2021 (12:06:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.1099.v1

Ultrahigh Nonlinear Optical Absorption in 2D MXene Films

David Moss

Subject: Physical Sciences, Optics And Photonics Keywords: 2D materials; nonlinear optics; MXene; Z-scan technique

Online: 15 August 2023 (07:11:04 CEST)

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Preprint REVIEW | doi:10.20944/preprints202001.0079.v1

Review of Absorption Oil Content in Water Injection

Aditya Nugraha Ernawan, Alfi Fachrizal, Angga Wijaya, Bima Syahreza, Muhammad Ridwan Alkhandi, Mayang Firdaus, Mulyono Dyatmahendri, Rizka Ananda, Wily Rustam, Muhammad Khoirul Afdhol, Tomi Erfando

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: absorption; oil content; water injection; treatment

Online: 9 January 2020 (09:44:35 CET)

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Preprint ARTICLE | doi:10.20944/preprints202409.1479.v1

Enhanced SAR Compression through Multi-Look Doppler Compensation and Auto-Focusing Technique

HyeonSeong Kim, YongHwi Kwon, ChulKi Kim

Subject: Engineering, Electrical And Electronic Engineering Keywords: Synthetic Aperture Radar; Doppler Estimation; Auto-Focusing; Fractional Fourier Transform

Online: 19 September 2024 (08:39:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0662.v2

Integrated Optimization of Large Language Models: Synergizing Data Utilization and Compression Techniques

Xinjin Li, Yu Ma, Yangchen Huang, Xingqi Wang, Yuzhen Lin, Chenxi Zhang

Subject: Computer Science And Mathematics, Computer Science Keywords: Natural Language Processing (NLP); Large Language Models (LLMs); Data Utilization; Model Compression; Knowledge Distillation

Online: 10 September 2024 (14:16:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201611.0079.v1

Design and Numerical Analysis of Mixed Compression Inlet of a Shcramjet Engine

Nitish Acharya, Sajan Sharma, Lokesh Silwal, Sudip Bhattrai

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: oblique detonation wave; mixed compression inlet; inlet diffusion; total pressure recovery

Online: 16 November 2016 (09:32:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0538.v1

Carbon Instrumentation in Patients with Metastatic Spinal Cord Compression

Søren Schmidt Morgen, Emma Benedikte Alfthan Madsen, Anders Skive Weiland, Benny Dahl, Martin Gehrchen

Subject: Medicine And Pharmacology, Orthopedics And Sports Medicine Keywords: Spine surgery 1; Metastatic spinal cord compression 2; Spinal metastasis 3; Cancer treatment.

Online: 8 January 2024 (08:22:25 CET)

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Preprint ARTICLE | doi:10.20944/preprints201710.0097.v1

Discrete Sine Transform-Based Interpolation Filter for Video Compression

MyungJun Kim , Yung-Lyul Lee

Subject: Computer Science And Mathematics, Discrete Mathematics And Combinatorics Keywords: HEVC; Interpolation filter; Sinc; DCT (discrete cosine transform); DST (discrete sine transform)

Online: 14 October 2017 (13:53:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.1507.v1

Absorption and Distribution of Imidacloprid and Its Metabolites in goldfish(Carassius Auratus Linnaeus)

Wanghui Xu, Lulu Zhang, Jiayin Hou, Xiaohua Du, Liezhong Chen

Subject: Biology And Life Sciences, Toxicology Keywords: Imidacloprid; Goldfish; Metabolites; Tissue Distribution; Toxicity

Online: 21 June 2023 (08:57:58 CEST)

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Imidacloprid is the first-generation neonicotinoid insecticide. But, the long-term use of im-idacloprid as a pesticide has caused severe water pollution. Recently, the toxicity of imidacloprid to aquatic organisms has received increasing attention. This study aimed to investigate the ab-sorption and distribution of imidacloprid in various tissues (gills, intestine, liver, muscle, brain, and gonads) of goldfish through short-term and continuous exposure tests for 28 days. The re-sults of short-term exposure indicated that the concentration of imidacloprid and its metabolites in tissues at the transfer stage decreased steadily after 1 day of 40 mg/l imidacloprid water treatment and was below the detection limit after 3 days. Continuous exposure for 28 days at various treatment concentrations showed that the concentrations of imidacloprid and its metab-olites differed significantly among the different tissues of the goldfish. In the 20 mg/l treatment group (S1), the highest concentration of imidacloprid was found in the liver (12.04 μg /gtissue), followed by the intestine (9.91 μg /gtissue), muscle (6.20 μg /gtissue), gill (6.11 μg /gtissue), gonads (5.22 μg /gtissue), and brain (2.87 μg /gtissue). In the 40 mg/l treatment group (S2), the order of tissue concentrations was similar to that of the S1 group, with the highest concentration observed in the liver (12.04 μg/gtissue), followed by the intestine (9.91 μg/gtissue), muscle (6.20 μg/gtissue), gill (6.11 μg/gtissue), gonads (5.22 μg/gtissue), and brain (2.87 μg/gtissue). Fur-thermore, the study detected 5-hydroxyimidacloprid, imidacloprid urea, and 6-chloronicotinic acid in imidacloprid metabolites in all tissues, while imidacloprid was detected only in the intes-tine and liver. Overall, the results of this study contribute to a better understanding of the met-abolic behavior of imidacloprid in organisms and provide new data to support the assessment of imidacloprid toxicity in fish.

Preprint ARTICLE | doi:10.20944/preprints202308.0494.v1

Moisture Absorption Characteristics and Subsequent Mechanical Properties Loss of Enset-PLA Composites

Abebayehu Abdela Gelgelu, Maxim Vandaele, Sam Haenen, Bart Buffel, Frederik Desplentere, Belete Sirahbizu

Subject: Chemistry And Materials Science, Ceramics And Composites Keywords: hydrophilic; PLA; plasticize; ﬁber concentration

Online: 7 August 2023 (10:07:03 CEST)

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Preprint REVIEW | doi:10.20944/preprints202306.1136.v1

Research Status and Future Perspectives of Low Dimensional Electromagnetic Wave Absorption Materials

Huaping Xu, Tao Tang, Zengming Man, Xiaofeng Wu, Haiqiang Zhao, Xiaohui Liang, Chuanying Li

Subject: Chemistry And Materials Science, Electronic, Optical And Magnetic Materials Keywords: electromagnetic wave absorption; attenuation mechanism; low-dimensional materials

Online: 15 June 2023 (12:00:25 CEST)

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Preprint REVIEW | doi:10.20944/preprints202012.0250.v1

Intestinal Absorption of β-Glucans and Their Effect on the Immune System

Shingo Hino, Naomichi Nishimura, Tsukasa Matsuda, Tatsuya Morita

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: β-glucan; intestinal absorption; immune system

Online: 10 December 2020 (11:30:57 CET)

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Preprint ARTICLE | doi:10.20944/preprints202008.0290.v1

Ablation-Dominated Arcs in CO² Atmosphere - Part II: Molecule Emission and Absorption

Ralf Methling, Nicolas Götte, Dirk Uhrlandt

Subject: Engineering, Electrical And Electronic Engineering Keywords: circuit breaker; switching arc; optical emission spectroscopy; optical absorption spectroscopy; current zero; SF6 alternative gases; CO2; PTFE; Swan bands; CuF

Online: 13 August 2020 (06:00:47 CEST)

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Working Paper ARTICLE

Features of Structure and Absorption in the Jet-launching Region of M87

Wei Zhao, Xiaoyu Hong, Tao An, Xiaofeng Li, Xiaopeng Cheng, Fang Wu

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: individual (m87); galaxies: jets; galaxies: active; radio continuum: galaxies

Online: 1 October 2019 (16:01:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0289.v2

Numerical Analysis of SO₂ Absorption inside a Wet Scrubber

Amedeo Amoresano, Giuseppe Langella, Paolo Iodice, Silvia Roscioli

Subject: Engineering, Mechanical Engineering Keywords: Seawater scrubber; SOX; Absorption

Online: 29 April 2023 (02:47:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202104.0445.v1

Phase Correction for Absorption Mode Two-dimensional Mass Spectrometry

Marc-André Delsuc, Kathrin Breuker, Maria A. van Agthoven

Subject: Chemistry And Materials Science, Analytical Chemistry Keywords: mass spectrometry; two-dimensional; tandem mass spectrometry; phase correction; absorption mode; data processing

Online: 16 April 2021 (12:41:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201911.0028.v1

Hydrogen Sensor Based on Tunable Diode Laser Absorption Spectroscopy

Viacheslav Avetisov, Ove Bjoroey, Junyang Wang, Peter Geiser, Ketil Gorm Paulsen

Subject: Chemistry And Materials Science, Analytical Chemistry Keywords: gas sensor; hydrogen sensor; diode laser; TDLAS; WMS; absorption spectroscopy; laser spectroscopy; hydrogen

Online: 3 November 2019 (18:21:16 CET)

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Preprint ARTICLE | doi:10.20944/preprints202409.0466.v1

Compression Molding of PE Matrix/GF Fabric Reinforced Thick Laminates

Fabrizio Quadrini, Giorgio Patrizii, Alice Proietti, Leandro Iorio, Denise Bellisario, Loredana Santo

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: thermoplastic composites; glass fabrics; fiberglass; low density polyethylene; compression molding; recycling; repairing

Online: 6 September 2024 (03:46:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202312.0376.v1

Absorption and Biotransformation of Selenomethionine and Selenomethionine-oxide by Wheat Seedlings (Triticum aestivum L.)

Qi Wang, Siyu Huang, Qingqing Huang, Yao Yu, Huafen Li, Yanan Wan

Subject: Biology And Life Sciences, Agricultural Science And Agronomy Keywords: wheat; selenomethionine; selenomethionine-oxide; uptake; Se speciation; interaction

Online: 6 December 2023 (10:39:03 CET)

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Preprint ARTICLE | doi:10.20944/preprints202308.0165.v1

An Improved Image Compression Algorithm Using 2D DWT and PCA with Canonical Huffman Encoding

RAJIV RANJAN, Prabhat Kumar

Subject: Computer Science And Mathematics, Computer Science Keywords: Canonical Huffman Coding (CHC); 2D Discrete Wavelet Transform (2D DWT); hard thresholding; Lossy Image Compression

Online: 2 August 2023 (07:35:21 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202012.0355.v2

Form-Finding of Shells Containing Both Tension and Compression Using the Airy Stress Function

Masaaki Miki, Emil Adiels, William Baker, Toby Mitchell, Alexander Sehlstrom, Christopher Williams

Subject: Engineering, Civil Engineering Keywords: force diagram; Airy stress function; graphic statics; form-finding; membrane shell; tension-compression mixed type shell; asymptotic lines; wave equation

Online: 15 December 2020 (13:27:25 CET)

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Preprint ARTICLE | doi:10.20944/preprints201807.0321.v1

Compression and Tension Inversely Change Osteoprotegerin Expression via miR-3198 in Periodontal Ligament Cells

Hiroyuki Kanzaki, Satoshi Wada, Yuuki Yamaguchi, Yuta Katsumata, Kanako Itohiya, Sari Fukaya, Yutaka Miyamoto, Tsuyoshi Narimiya, Koji Noda, Yoshiki Nakamura

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: MicroRNA; osteoprotegerin (OPG); orthodontic tooth movement (OTM); miR-3198; mechanical stresses; periodontal ligament cells (PDL cells); compression; tension

Online: 18 July 2018 (08:58:19 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201802.0083.v1

Flow Behavior Characteristics and Processing Map of Fe-6.5wt.%Si Alloys during Hot Compression

Shibo Wen, Chaoyu Han, Bao Zhang, Yongfeng Liang, Feng Ye, Junpin Lin

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: Fe-6.5wt.%Si alloy; hot compression; processing map; microstructure; optimized processing parameter

Online: 11 February 2018 (11:20:10 CET)

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Preprint ARTICLE | doi:10.20944/preprints202003.0454.v1

A Study on Shock Absorption Characteristics of Honeycomb-inserted Bollards

Sangwon Seon, Kyoungwok Kim, Cheonho Bae, Won Yi

Subject: Engineering, Mechanical Engineering Keywords: bollard; honeycomb; Polylactic acid (PLA); LS-DYNA; shock-absorption; in-plane

Online: 31 March 2020 (10:14:16 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.0400.v1

RCA-PixelCNN:Residual Causal Attention PixelCNN for Pulsar Candidate Image Lossless Compression

Jiatao Jiang, Xiaoyao Xie, Xuhong Yu, Ziyi You, Qian Hu

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: pulsar candidate image; lossless compression; PixelCNN; FAST

Online: 6 September 2023 (09:48:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.0364.v1

MRI Images Compression by Deep Convolution Network with Optimize Pixel Predictor

Garima Garg, Raman Kumar

Subject: Computer Science And Mathematics, Computer Science Keywords: Medical images; Compression; CNN; LMCDP; Prediction

Online: 4 August 2023 (07:21:52 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0319.v3

Axial Compression Model for FRP Confined Concrete in Elliptical Cross Sections

Zhenyu Wang, Haytham F. Isleem

Subject: Chemistry And Materials Science, Ceramics And Composites Keywords: FRP confined; axial compression; RC columns; strength; ductility; modeling

Online: 2 November 2018 (14:18:57 CET)

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Preprint ARTICLE | doi:10.20944/preprints202002.0343.v1

Towards Heralded Two-Photon Absorption and Two-Photon Excited Fluorescence for Quantum Microscopy and Spectroscopy

Andreas Jechow

Subject: Physical Sciences, Optics And Photonics Keywords: multi-photon processes; quantum optics; photon statistics; fluorescence

Online: 24 February 2020 (02:57:17 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.1547.v1

Electrical Conductivity, EMI Absorption Shielding Performance, Curing Process and Mechanical Properties of Rubber Composites

Ján Kruželák, Andrea Kvasničáková, Michaela Džuganová, Rastislav Dosoudil, Ivan Hudec, Henrich Krump

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: rubber; manganese-zinc ferrite; nickel-zinc ferrite; carbon black; carbon fibers; electromagnetic absorption shielding

Online: 22 January 2024 (04:29:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202308.0656.v1

Nonlinear Optical Absorption of Impurities in Hexagonal Quantum Wires: Electric and Magnetic Field Effects

Anna Sofía Giraldo-Neira, Tomas Sosa-Giraldo, Juan Alejandro Vinascos-Sánchez, Álvaro Luis Morales Aramburo, Carlos Alberto Duque Echeverri, Miguel Eduardo Mora-Ramos, Ricardo León Restrepo Arango

Subject: Physical Sciences, Condensed Matter Physics Keywords: intraband energy transitions; optical absorption coefficients; hexagonal quantum well wires; GaAs/AlGaAs; core/shell structure

Online: 8 August 2023 (11:20:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0890.v1

Investigation of Broadband Optical Nonlinear Absorption and Transient Dynamics in Orange IV Containing Azobenzene

Quanhua Wu, Rui Ruan, Xingxing Li, Yujie Zhao, Yang Li, Yu Fang, Yongqiang Chen, Quanying Wu, Yinglin Song, Xingzhi Wu

Subject: Physical Sciences, Optics And Photonics Keywords: Nonlinear optics; Z-scan; Transient absorption and refraction; Pump probe

Online: 25 April 2023 (05:40:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202302.0229.v1

Branching Random Walks with One Particle Generation Center and Possible Absorption at Every Point

Elena Filichkina, Elena Yarovaya

Subject: Computer Science And Mathematics, Probability And Statistics Keywords: branching random walks; moments of particle numbers; evolution operator; Green’s function

Online: 14 February 2023 (03:29:07 CET)

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Preprint ARTICLE | doi:10.20944/preprints202112.0002.v1

Performance Study of Absorption Tower and Adsorption Reactor to Eliminate Ammonia Gas as Pollutant

Ikha Rasti Julia Sari, Januar Arif Fatkhurrahman, Yose Andriani

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: ammonia; emission control; saturation point; absorption tower; adsorption reactor

Online: 1 December 2021 (10:22:31 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0299.v1

Effect of Infill Parameters and Nano-Reinforcement on Compression Performance of 3D Printed Polylactic Acid

Dorivane Farias, Dhonata Caldas Oliveira, Luciano Quaresma, Mário Sousa, Miriane Alexandrino Pinheiro, Rômulo S. Angélica, Simone Patrícia Aranha Da Paz, Marcos Allan Leite Dos Reis

Subject: Chemistry And Materials Science, Nanotechnology Keywords: Infill Patterns; Fused Deposition Modeling; Mechanical Properties; Nanocomposite.

Online: 5 February 2024 (15:12:18 CET)

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With the advancement of Additive Manufacturing and its applications in various industrial segments, it becomes increasingly important to investigate the processability parameters associated with nano-reinforcement. This study examines the influence of infill parameters, such as patterns (hexagonal, triangular and concentric), shape (solid and honeycomb) and concentrations by mass of Carbon Nanotubes (CNTs) at 1.0 wt% and 2.0 wt% on the mechanical compression properties of the 3D printed material. In this sense, nanocomposites based on Polylactic Acid (PLA) matrix nano-reinforced by CNTs were characterized using the Scanning Electron Microscopy -SEM, X-ray Diffraction, Raman Spectroscopy techniques and mechanical analysis. The mechanical properties of both the matrix and the nanocomposites were determined through mechanical compression tests, in accordance with [1]. SEM revealed compacted regions, voids, and detachment in the structures. XRD characterization indicated PLA predominantly amorphous nature, while CNTs exhibited characteristic diffractions of carbon nanotubes. Raman characterization showcased bands and characteristic vibrations of CNTs and PLA, nanocomposites' vibrational modes combine those of CNTs and PLA. Mechanical compression analysis indicates a direct influence of infill pattern, shape, and nano-reinforcement. The triangle pattern outperformed other patterns, exhibiting a 15.03% increase compared to concentric and 8.8% compared to hexagon infill. In nanocomposites, all showed higher compressive strength than the matrix. For PLA/1.0%CNTs, strength was 16.8%, and for PLA/2.0%CNTs, it reached 39.2%. In honeycomb shapes with infill variations, the triangular pattern excelled with a 0.97% increase over concentric and 6.12% over hexagon patterns. Honeycomb results indicate a 59.6% increase for (PLA/1.0%CNTs) and a 0.48% increase for (PLA/2.0%CNTs) compared to the matrix. This study highlights 3D printing parameters, emphasizing the effectiveness of the triangular pattern and the enhanced strength with the addition of CNTs, providing insights to enhance products manufactured through Additive Manufacturing.

Preprint ARTICLE | doi:10.20944/preprints201704.0056.v1

Piezoresistive Response of Integrated CNT Yarns under Compression and Tension: The Effect of Lateral Constraint

Jude C. Anike, Huy H. Le, Grace E. Brodeur, Mathew M. Kadavan, Jandro L. Abot

Subject: Chemistry And Materials Science, Nanotechnology Keywords: carbon nanotube yarn; strain sensing; polymer; piezoresistivity; experimental

Online: 10 April 2017 (08:12:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.1876.v1

Application of Successful EU Funds Absorption Models on Sustainable Regional Development

Marko Šostar, Vladimir Ristanović, Chamaru de Alwis

Subject: Business, Economics And Management, Business And Management Keywords: Sustainable regional development; EU funds; Development projects; Absorption

Online: 28 June 2023 (04:04:18 CEST)

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The research paper comprehensively and consistently addresses all relevant theoretical areas related to the topic and includes an extensive empirical analysis of the absorption of EU funds and their impact on the sustainable development of Croatia, Slovenia, Hungary, and Poland. The analysis aims to investigate the efficiency of the absorption of funds from the EU, the impact of these funds on regional development of countries, as well as the reasons for such impacts. The "Regional Development Model Based on EU Funds" was tested with the aim of applying the model to the Republic of Croatia, countries in the region, and other European countries to achieve a higher level of absorption of financial resources from the available EU funds. Data for the empirical analysis were collected using a highly structured survey questionnaire on a sample of 244 respondents involved in the preparation and implementation of EU-funded projects. The contribution of economic science in theoretical terms arises from the development of scientific knowledge and ideas about the importance of increasing the number of development projects that will increase the absorption of funds from the European Union, thereby increasing economic activities in Croatia and the region. The expected contribution of economic science in the applied sense is based on the formulation of the "Regional Development Model Based on EU Funds," which is based on the application of knowledge, good practices, and stakeholder experiences, considering relevant indicators from available sources. The greatest contribution is demonstrated through testing the "Regional Development Model Based on EU Funds," which is applicable to the Republic of Croatia, countries in the region, and other European countries over a longer period. Finally, research of the impact of EU funds on the regional development of recipient countries is considerably less represented and very modest, only in the "upswing" of systematic scientific research. The research aims to fill the gaps in research and encourage thinking of key stakeholders responsible for regional development, who should eventually realize the importance of defining a regional policy aimed at EU funds as a key to regional development and reducing regional disparities within countries.

Preprint ARTICLE | doi:10.20944/preprints202306.0095.v1

Lightweight Co₃O₄/CC Composites with High Microwave Absorption at Low Frequency

Bing An, Mei Wu, Xinhuang Yang, Zengming Man, Xiaohui Liang, Chunyang Feng

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: Low frequency; Co3O4/CC; Co-MOFs/CC; thinner thickness

Online: 1 June 2023 (13:35:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.1592.v1

Towards the Isothermal Compression – A Novel Finned Piston-Cylinder with Increased Efficiency

Alfred Rufer

Subject: Engineering, Mechanical Engineering Keywords: gas compression; isothermal; energy efficiency; heat exchange; finned piston

Online: 28 February 2024 (08:38:40 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0425.v1

Lossy Compression of Individual Sequences Revisited: Fundamental Limits of Finite-State Encoders

Neri Merhav

Subject: Engineering, Electrical And Electronic Engineering Keywords: rate-distortion; source coding; finite-state encoders; random coding; code ensemble; lossy compression; universal coding; universal distribution; LZ algorithm

Online: 4 January 2024 (16:05:12 CET)

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Preprint ARTICLE | doi:10.20944/preprints202308.1218.v1

Modeling of Coffee Fruit: An Approach to Simulate the Effects of Compression

Janielle Souza Pereira, Ricardo Rodrigues Magalhães, Fábio Lúcio Santos, Ednilton Tavares De Andrade, Leomar Santos Marques

Subject: Engineering, Mechanical Engineering Keywords: deformation; finite element method; mechanical damage; mechanical properties; numerical simulation.

Online: 17 August 2023 (09:45:57 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202205.0326.v1

Buckling Behavior of Different Types of Woven Structures Under Axial Compression Loads

Guangkai Song, Bohua Sun

Subject: Engineering, Mechanical Engineering Keywords: In-plane curvatures; Buckling; Woven structure; 3D print; Gaussian curvature

Online: 24 May 2022 (09:06:46 CEST)

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Preprint REVIEW | doi:10.20944/preprints202202.0355.v1

Quantitative MR Markers in Non-Myelopathic Spinal Cord Compression: A Narrative Review

Jan Valošek, Petr Bednařík, Miloš Keřkovský, Petr Hluštík, Josef Bednařík, Alena Svátková

Subject: Medicine And Pharmacology, Neuroscience And Neurology Keywords: non-myelopathic cervical spinal cord compression; degenerative cervical myelopathy; diffusion magnetic resonance imaging; quantitative magnetic resonance imaging

Online: 28 February 2022 (10:20:37 CET)

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Working Paper ARTICLE

Predicting Compression Index of Fine-Grained Soils Using Gene Expression Programming Model

Danial Mohammadzadeh, Seyed-Farzan Kazemi, Amir Mosavi, Ehsan Nasseralshariati

Subject: Engineering, Civil Engineering Keywords: evolutionary model, gene-expression programming (GEP), prediction, soil compression index, estimation, soil engineering, soil informatics, civil engineering, machine learning, data science, big data, soft computing, deep learning, forecasting, subject classification codes, construction informatics, computational intelligence (CI), artificial intelligence (AI), estimation

Online: 25 March 2019 (10:25:18 CET)

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Preprint ARTICLE | doi:10.20944/preprints201808.0392.v1

A Stress-Strain Model for Unconfined in Compression Considering the Size Effect

Keun-Hyeok Yang, Yongjei Lee, Ju-Hyun Mun

Subject: Engineering, Mechanical Engineering Keywords: stress-strain model; size effect; fracture energy; softening

Online: 22 August 2018 (09:34:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201808.0309.v1

Real-Time Lossless Compression Algorithm for Ultrasound Data Using BL Universal Code

Jung Hoon Kim, Sunmi Yeo, Jong Won Kim, Kyeongsoon Kim, Tai-kyong Song, Changhan Yoon, Joohon Sung

Subject: Computer Science And Mathematics, Software Keywords: Medical ultrasound; Lossless compression; Universal code; Run-length encoding

Online: 17 August 2018 (12:55:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201703.0179.v1

A Novel Range Compression Algorithm for The~Resolution Enhancement in GNSS-SAR

Yu Zheng, Yang Yang, Wu Chen

Subject: Engineering, Electrical And Electronic Engineering Keywords: GNSS-SAR; global navigation satellite system; synthetic aperture radar; range compression; range resolution

Online: 23 March 2017 (09:20:08 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1178.v1

Metamaterial Labyrinth Wall Low-Frequency Sound Absorption Measurements for Restaurant Room Acoustics and Decorative Applications

Rolf Bader, Johannes Mischo, Stefanie Gernert, Hendrik Mischo

Subject: Physical Sciences, Acoustics Keywords: Room Acoustics, Acoustic Metamaterials, Restaurant Acoustics

Online: 20 March 2024 (09:11:45 CET)

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Preprint REVIEW | doi:10.20944/preprints202308.0298.v2

Absorption of Light in Vertical III-V Semiconductor Nanowires for Solar Cell and Photodetector Applications

Nicklas Anttu

Subject: Physical Sciences, Applied Physics Keywords: III-V semiconductor; nanowire; absorption; solar cell; photodetector

Online: 17 August 2023 (07:53:02 CEST)

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Preprint DATA DESCRIPTOR | doi:10.20944/preprints202202.0305.v1

Theoretical Calculations and Analysis Method of the Physicochemical Properties of Phytochemicals to Predict Gastrointestinal Absorption

Luis A. Vélez, Yamixa Delgado, Yancy Ferrer-Acosta, Ivette J. Suárez-Arroyo, Priscilla Rodríguez, Daraishka Pérez

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: Physicochemical properties; Gastrointestinal absorption; Lipinski's rules; Veber's rules; Ghose's rules; Muegge's rules

Online: 24 February 2022 (08:35:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints202108.0390.v1

Connection between Sinc Approximation for High-Energy Absorption Cross Section and Shadow of Black Holes

Ali Övgün

Subject: Physical Sciences, Atomic And Molecular Physics Keywords: Gravitation; Black hole; Shadow; High-energy physics; Cross-section; Null geodesics

Online: 18 August 2021 (14:31:11 CEST)

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Working Paper REVIEW

Iron and Zinc Interactions: Does Entero-Pancreatic-Zinc Excretion Cross-Talk with Intestinal Iron Absorption?

Kondaiah Palsa, Puneeta Singh Yaduvanshi, Paul Sharp, Raghu Pullakhandam

Subject: Biology And Life Sciences, Food Science And Technology Keywords: Iron, Zinc, Interactions, DMT1, ZIP4, Pancreas, Metabolism, Homeostasis, Intestine, Caco-2 cells

Online: 9 July 2019 (14:32:11 CEST)

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Preprint REVIEW | doi:10.20944/preprints202307.0183.v1

Magnetic Compression Anastomosis – Past Experience and Current Proposals for Further Development in Pediatric Minimally Invasive Surgery

Anatole M. Kotlovsky, Oliver J. Muensterer, Vasily V. Nikolaev, Alexander Y. Razumovskiy

Subject: Medicine And Pharmacology, Pediatrics, Perinatology And Child Health Keywords: magnetic compression anastomosis; magnamosis; minimally invasive surgery; pediatric surgery; children

Online: 4 July 2023 (10:44:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202205.0177.v1

Evaluation of Axial Compression Slenderness Limits of High and Very-High Strength Steel Circular Hollow Sections

Fattouh M. F. Shaker, Kyrolos Zarzor, Sameh Gaawan, Ahmed Deifalla, Gokhan Pekcan

Subject: Engineering, Civil Engineering Keywords: cross-section resistance; slenderness limit; high strength steel; tubular sections; very-high strength steel; cold-formed; thin-walled circular hollow sections; finite element analysis; ANSYS

Online: 13 May 2022 (04:07:01 CEST)

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Despite significant advances in metallurgy and the potential to create high and very high-strength steel, all international specifications for steel design provided little information about the limits of slenderness for high-strength steel sections (HSSs) and didn’t give anything about the design of very high-strength steel sections (VHSSs). The American structural steel design specification covers circular hollow sections (CHS) of steel grades up to S690, while it isn't in ANSI/AISC 360-16 and ASTM A514/A514M. Euro code EN 1993-1-1 can be applicable only to steel grades up to S460. EN 1993-1-3 and EN 1993-1-12 contain supplementary rules for cold-formed members and HSS (S460- S700), respectively. Though ductility requirements for (HSS) are specifically established in EN 1993-1-12, it is largely a continuation of the normal-strength-steel design procedures standardized in EN 1993-1-1, where (HSSs) are largely treated as normal-strength steels in these rules, and the same design approaches are used. The behavior of high and very high-strength steel circular hollow sections under axial compression load is studied in this research. A total of 16 nonlinear finite-element (FE) models were generated to replicate stub column tests that were experimentally tested by others in previous research. Hence, a parametric study is conducted using forty FE models developed to investigate the local buckling behavior under various slenderness ratios comprehensively. The developed models cover slenderness ratios ranging from 20 to 1226 and steel grades S460 and S1100 with yield stress equal 460 MPa and 1152 MPa, respectively. The FE results were combined with 105 previously collected experimental results to assess the applicability of existing codified design methodologies in the Euro code and the North American codes of cold-formed CHS. Based on the results of this study, new cross-sectional slenderness limits and new design equations for more efficient simple designs were presented for high and very-high strength steel circular hollow sections and Compared with the results of experimental tests and FE models.

Preprint ARTICLE | doi:10.20944/preprints202103.0360.v1

ClefNet: Recurrent Autoencoders with Dynamic Time Warping for Near-Lossless Music Compression and Minimal-Latency Transmission

Vignav Ramesh, Mason Wang

Subject: Computer Science And Mathematics, Computer Science Keywords: music production, latent space, live system, recurrent autoencoder, dynamic time warping, compression

Online: 15 March 2021 (08:04:00 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1303.v1

Transitioning to a Hydrogen Economy: Exploring the Viability of Adapting Natural Gas Pipelines for Hydrogen Transport Through a Case Study on Compression vs. Looping

Abubakar Jibrin Abbas, Salisu Kwalami Haruna, Martin Lawrence Burby, Idoko Job John, Kabir Yar'adua Hassan

Subject: Engineering, Chemical Engineering Keywords: Gas pipeline expansion; Hydrogen; compressor station; looping; pipeline economics

Online: 21 March 2024 (12:52:10 CET)

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The growing importance of hydrogen as an energy carrier in a future decarbonized energy system has led to a surge in its production plans. However, the development of infrastructure for hydrogen delivery, particularly in the hard-to-abate sectors, remains a significant challenge. While the construction of new pipelines entails substantial investment, repurposing existing pipelines offers a cost-effective approach to jump-starting hydrogen networks. Many European countries are exploring the possibility of utilizing their current pipeline infrastructure for hydrogen transport. Yet, a critical aspect requiring extensive research is the expansion planning of these networks to accommodate increased capacity in the future. This study investigates the utilization of existing natural gas pipeline infrastructure for hydrogen transportation as a cost-saving measure. It explores two expansion strategies, namely pipeline looping and compression, for repurposing a segment of a 342 km x 36inch existing pipeline, from the Escravos – Lagos gas pipeline system (ELPS) in Nigeria, for hydrogen transport. Employing the Promax® process simulator tool, the study assesses compliance with the API RP 14E and ASME B31.12 standards for hydrogen and hydrogen-methane blends. Both expansion strategies demonstrate acceptable velocity and pressure drop characteristics for hydrogen blends of up to 40%. Additionally, the increase in hydrogen content leads to heightened compression power requirements until approximately 80% hydrogen in the blends for compression, and a corresponding extension in looping length until around 80% hydrogen in the blend for looping. Moreover, the compression option proves to be more economically viable for all investigated proportions of hydrogen blends for the PS1-PS5 segment of the Escravos – Lagos gas pipeline case study. The percentage price differentials between the two expansion strategies reach as high as 495% for a 20% hydrogen proportion in the blend. This study offers valuable insights into the technical and economic implications of repurposing existing natural gas infrastructure for hydrogen transportation.

Preprint ARTICLE | doi:10.20944/preprints201905.0364.v1

Laser-Plasma and Self-Absorption Measurements with Applications to Analysis of Atomic and Molecular Stellar Astrophysics Spectra

Christian Parigger, Christopher M Helstern, Ghaneshwar Gautam

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: atomic and molecular spectroscopy; time-resolved spectroscopy; laser plasma; laser-induced optical breakdown; stellar astrophysics spectra; white dwarf stars; hydrogen; carbon Swan spectra

Online: 30 May 2019 (08:53:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.2009.v1

Characterization of Na_0.5Bi_0.5TiO₃ Single Crystals by X-ray Diffraction, Scanning Electron Microscopy, X-ray Photoelectron Spectroscopy, Optical Absorption, Electric and Thermoelectric Properties Studies

Jan J.Suchanicz, Kamila Kluczewska-Chmielarz, Grzegorz Jagło, Andrzej Kruk, Antoni Kania, Dorota Sitko, Michalina Nowakowska-Malczyk, Marcin Łapiński, Grzegorz Stachowski, Tatiana Kruzina

Subject: Chemistry And Materials Science, Electronic, Optical And Magnetic Materials Keywords: Na_0.5Bi_0.5TiO₃ single crystals; insulator-metal transition; electrical conductivities; relaxation process

Online: 30 May 2024 (10:42:39 CEST)

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High-quality and large-size single crystals of lead-free Na0.5Bi0.5TiO3 were grown using the Czo-chralski technique. The crystals had pure perovskite structure with rhombohedral symmetry and were translucent in the visible and near infrared spectral ranges recorded in the interval 350-1050 nm. The energy gaps determined from the X-ray photoelectron spectroscopy (XPS) and optical measurements were approximately 2.92 eV. The current-voltage characteristics, depolarization current, dc (σdc) and ac (σac) electrical conductivity, and Seebeck coefficient of the crystals were investigated. The frequency/temperature-dependent electrical properties were also measured and analyzed through complex impedance spectroscopy. An overlapping reversible insulator-metal transition (resistive switching) on nanoscales, caused by the electric field, was detected. This was the first time that most of these investigations were performed for this material. The following conductivity mechanisms of NBT single crystals were identified: (i) quasi-free electron and hole conduction and hopping-charges mechanism at low temperatures, (ii) small polaron conductivity in the middle temperature range, and (iii) a significant contribution of the oxygen vacancies to conductivity in the high temperature range. The activation energy values determined from the conductivity data, the imaginary part of the electric impedance and the modulus indicate that the relaxation process in the high-temperature range is attributable to both single and double ionized oxygen vacancies, in combination with the hopping of electrons between Ti4+ and Ti3+. P-type electrical conductivity was also found. These discoveries create new possibilities of reducing the electrical conductivity of NBT and improving the process of effectively poling this material. The density of the electronic states was investigated using an ab initio method. The energy gap cal-culated for NBT (R3c) was 2.8 eV, and is well comparable to those determined from XPS and optical measurements. Our results indicate the possibility of tuning material properties by inten-tionally creating non-stoichiometry/structural defects (oxygen vacancies, cation excess and cation deficiency).

Preprint ARTICLE | doi:10.20944/preprints202309.1819.v1

Absorption-Translocation of Veterinary Antibiotics in Rice Plants Introduced with Irrigation Water

Jae Young Cho, Van Hay Duong, Il-Hwan Seo, Hee Su Jeon

Subject: Environmental And Earth Sciences, Environmental Science Keywords: Veterinary antibiotics; translocation; phytotoxicity; bioconcentration factor; rice paddy

Online: 27 September 2023 (06:57:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.1509.v1

Noise Reduction in Helicopter Cabins Using Microperforated Panel Composite Sound Absorption Structures

Chenglei Li, Yang Lu, Chunbo Lan, Yang Wang

Subject: Engineering, Aerospace Engineering Keywords: helicopter; cabin noise reduction; microperforated panel; composite acoustic structure; sound field analysis; acoustic metamaterials

Online: 21 June 2023 (08:51:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.1221.v1

Sustainable Sawdust/Eucalyptol Absorption Matrix for Odor Slow-Release in Plywood Floor

Yuliya Logvina, Sónia Fernandes, Luís Pinto da Silva, Joaquim Esteves da Silva

Subject: Chemistry And Materials Science, Paper, Wood And Textiles Keywords: Carbon footprint; Wood residuals; Sawdust; eucalyptol; Odor release; Plywood; carbon footprint

Online: 29 April 2023 (07:27:51 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202103.0589.v1

Identification of LLDPE Constitutive Material Model for Energy Absorption in Impact Applications

Luděk Hynčík, Petra Kochová, Jan Špička, Tomasz Bońkowski, Robert Cimrman, Sandra Kaňáková, Radek Kottner, Miloslav Pašek

Subject: Chemistry And Materials Science, Biomaterials Keywords: LLDPE; quasi-static and dynamic experimental tests, impact energy absorption; material parameter identification; constitutive material model; validation; simulation

Online: 24 March 2021 (13:38:40 CET)

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Preprint ARTICLE | doi:10.20944/preprints202008.0258.v2

Off-Resonant Absorption Enhancement in Single Nanowires via Graded Dual-Shell Design

Wenfu Liu, Xiaolei Guo, Shule Xing, Haizi Yao, Yinling Wang, Liuyang Bai, Qi Wang, Liang Zhang, Dachuan Wu, Yuxiao Zhang, Xiao Wang, Yasha Yi

Subject: Chemistry And Materials Science, Nanotechnology Keywords: single nanowires; silicon; dual shells; off-resonance; absorption; photocurrent

Online: 31 August 2020 (08:30:22 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints201908.0192.v1

Generation of Optical Absorption Band in Colloidal Coffee at Extremely Alkaline pH

Arindam Kushagra, Akshaya Pandey

Subject: Chemistry And Materials Science, Applied Chemistry Keywords: caffeine; colloidal coffee; optical absorption; pH sensor; solute-solvent interactions; UV absorber

Online: 19 August 2019 (04:14:30 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201709.0036.v1

Novel Semi-parametric Algorithm for Interference-immune Tunable Absorption Spectroscopy Gas Sensing

Umberto Michelucci, Francesca Venturini

Subject: Physical Sciences, Optics And Photonics Keywords: interference; interference cancellation; noise reduction; digital filtering; spectroscopy; sensors

Online: 11 September 2017 (04:42:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.2230.v1

Parallel Lossless Compression of Raw Bayer Images on FPGA-BASED High-Speed Camera

Žan Regoršek, Aleš Gorkič, Andrej Trost

Subject: Engineering, Electrical And Electronic Engineering Keywords: lossless image compression; sensor data processing; parallel processing; high-speed image capture; FPGA

Online: 30 August 2024 (12:45:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.1630.v1

Research on Rapid Detection of Underwater Targets Based on Global Differential Model Compression

Weishan Li, Yilin Li, Ruixue Li, Haozhe Shen, Wenjun Li, Keqiang Yue

Subject: Engineering, Marine Engineering Keywords: target detection; model compression; underwater embedded system; deep learning

Online: 22 August 2024 (08:57:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.1567.v1

All-Solid-State Post-Compression of Low Energy Pulses at High Repetition Rate

Vaida Marčiulionytė, Jonas Banys, Julius Vengelis, Gintaras Tamošauskas, Audrius Dubietis

Subject: Physical Sciences, Optics And Photonics Keywords: ultrafast laser science; pulse compression

Online: 26 March 2024 (11:23:29 CET)

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