BBC Russian

Preprint ARTICLE | doi:10.20944/preprints202407.1433.v1

Camouflage Breaking with Stereo-vision Assisted Imaging

Han Yao, Libang Chen, Jinyan Lin, Yikun Liu, Jianying Zhou

Subject: Physical Sciences, Optics And Photonics Keywords: camouflage breaking; binocular energy model; stereo-vision assisted 3D imaging

Online: 18 July 2024 (14:46:17 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.2042.v1

Bioelement Concentrations in Follicular Fluid and Their Im-pact on In Vitro Fertilization Outcomes

Marija P. Šorak, Aleksandar B. Nikolov, Predrag S. Sazdanovic, Neda S. Arsenijevic, Vesna M. Milicic, Jelena M. Cekovic, Aida Z. Parandilovic, Aleksandra Z. Gavrilovic

Subject: Medicine And Pharmacology, Reproductive Medicine Keywords: IVF; follicular fluid; oocytes; bioelements

Online: 28 August 2024 (10:46:33 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202110.0025.v1

Multimessenger Astronomy with Neutrinos

Francisco Salesa Greus, Agustín Sánchez Losa

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: multimessenger astronomy; astroparticle physics; neutrinos

Online: 1 October 2021 (14:43:34 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.0791.v1

Calculation of Some Low-Lying Electronic Excitations of Barium Monofluoride Using the Eom-CC3 Method with an Effective Core Potential Approach

Marko Horbatsch

Subject: Physical Sciences, Quantum Science And Technology Keywords: computational quantum chemistry, polar diatomic molecules, electronically excited states, coupled-cluster theory

Online: 12 August 2024 (11:44:06 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202402.0465.v1

On the Structural and Molecular Properties of PEO and PEO-PPG Functionalized Chitosan Nanoparticles for Drug Delivery

Rejeena Jha, Hyrum Harlow, Mourad Benamara, Robert A. Mayanovic

Subject: Physical Sciences, Other Keywords: chitosan nanoparticles; structure properties; polymer functionalization; x-ray diffraction; transmission electron microscopy; Fourier transform infrared spectroscopy

Online: 8 February 2024 (07:34:43 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202405.2089.v1

The Entropy of the Collapsing Molecular Cloud

Gemechu Muleta Kumssa

Subject: Physical Sciences, Space Science Keywords: Entropy; Gravity; Turbulence; Molecular cloud; Star formation

Online: 31 May 2024 (08:10:11 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202402.1645.v1

Time Expansion Wave Theory—A New Approach to Understanding the Universe and Its Expansion

G K Jarvis

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: universe expansion; gravity; wave-particle-duality; singularities; electromagnetism; quantum entanglement; fine structure constant; 137

Online: 28 February 2024 (14:43:47 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202306.0748.v1

Electronically Excited States of Free Radicals

Igor Vladimir Khudyakov

Subject: Chemistry And Materials Science, Physical Chemistry Keywords: Photoexcited free radicals; Jablonsky diagram; reactions with dioxygen, doublet and quartet states

Online: 12 June 2023 (03:41:29 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.0344.v1

Low-energy Cosmic Rays and Associated MeV Gamma-ray Emissions in the Protoplanetary System

Xulei Sun, Shuying Zheng, Zhaodong Shi, Bing Liu, Ruizhi Yang

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Protoplanetary disk; Low-energy cosmic rays; Gamma rays; Nuclear de-excitation lines

Online: 4 July 2024 (00:18:52 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201607.0046.v1

Wei Cai, Y Liu, Junhui Fan

Subject: Physical Sciences, Optics And Photonics Keywords: galaxies:blazar; light curve; simulation

Online: 18 July 2016 (10:39:32 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201607.0048.v1

Fractal features of Fermi Blazar Light Curves

Yi Liu, Wei Cai, Junhui Fan

Subject: Physical Sciences, Chemical Physics Keywords: galaxies:blazar; light curve; simulation

Online: 18 July 2016 (10:36:38 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.0032.v1

Modeling Double Stochastic Opinion Dynamics with Fractional Inflow of New Opinions

Vygintas Gontis

Subject: Physical Sciences, Mathematical Physics Keywords: time series and signal analysis; discrete stochastic dynamics; scaling in socio-economic systems; fractional dynamics; quantitative finance

Online: 1 August 2024 (10:20:47 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202406.0782.v1

One-Dimensional Relativistic Self-Gravitating Systems

Robert B. Mann

Subject: Physical Sciences, Theoretical Physics Keywords: Self-Gravitating Systems; Lower-Dimensional Gravity; Relativistic Chaos

Online: 13 June 2024 (03:40:01 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201607.0036.v1

The Classifications and Some Correlations for Fermi Blazars

Junhui Fan, Y Liu, J.H. Yang, C Lin, J.M. Hao

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: active; galaxies: jets; galaxies: nuclei

Online: 15 July 2016 (09:37:39 CEST)

Show abstract| Download PDF| Share

Preprint COMMUNICATION | doi:10.20944/preprints202309.0997.v1

Assisting Observational Astronomy for Public with Smart Telescopes and eXplainable Artificial Intelligence

Olivier Parisot, Mahmoud Jaziri

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: eXplainable Artificial Intelligence; Electronically Assisted Astronomy; Smart Telescope

Online: 15 September 2023 (03:54:32 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.1065.v2

An Introduction to Cosmos Thermodynamics

Xinyong Fu, Zitao Fu

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: closed universe; an eternal heat ocean at a temperature of 3K; the big cycle of matter and energy; matter shuttling and radiation shuttling; black holes are demons in the Nature; cosmos thermodynamics

Online: 30 July 2024 (00:10:32 CEST)

Show abstract| Download PDF| Share

Most astrophysicists today believe that the present universe was produced in a big bang. This article explores the big cycle of matter and energy in the universe, with the big bang as an important part of the cycle.The authors approve of the idea that the universe is gravitationally closed. That is, its average density is higher than the critical value. All the matter and radiation cannot fly out the closed universe.The 3k background radiation is a vast heat ocean in the closed universe, stable and eternal. It is not the afterglow of the thermal radiation of the decoupled fire ball, 380,000 years after the big bang, as many people believed so far. The big bang and the following big expansion drove the matter of more than 2×10¹²galaxies to the remote space. Their potential energies become higher and higher, while their huge kinetic energies that they derived from the big bang become smaller and smaller until drop down to zero. The galaxies will then return back one after another, passing the central region of the universe with tremendously great kinetic energies. They of course cannot all return back directly to their start point of the big bang and restore to the state of the original cosmic core. They will rush to pass the central region and fly to the other sides of the universe, and shuttle around the central part ceaselessly. From the big bang to the following expansion, to the numerous galaxies, to the more than 2×10²³ stars, and to the stars releasing huge nuclear energy due to their internal nuclear fusion each for about 10¹⁰ years, all these enormous processes are irreversible, resulting in enormous increase in entropy. These processes produce large amount of light and other radiations and pour them into the extremely vast heat ocean. These light and other radiations will also be shuttling ceaselessly in the vast heat ocean until, by their interaction with the rare dusts in the galaxies, they mingle into the 3K thermal radiation of the heat ocean. In all the galaxies, there are various black holes. Every black hole, since its birth, ceaselessly extracts the matter and radiation that approach it, and gets larger. In the above mentioned shuttling of all the galaxies, numerous stars and black holes in these galaxies have many chances to approach even meet each other. A black hole can annex other celestial bodies that it meets, including annex other black holes. All these processes carry on and on ceaselessly, resulting in the matter of these celestial bodies to concentrate again and again. The number of all the celestial bodies including the black holes reduces ceaselessly, and the mass of the survived black holes become larger, and their shuttling amplitudes become shorter. The larger black holes and the shorter amplitudes result in the rate of concentration of mass to be faster. Eventually, all the matter in the universe will be concentrated to form a tremendously large central black hole. The central black hole has an astonishingly large Schwarzschild sphere, absorbing the thermal radiation from the vast heat ocean very rapidly and ceaselessly until some threshold value of its internal energy is exceeded, and a new big bang breaks out. The black holes provide a way in the Universe to re-concentrate matter and energy again. Black holes are Maxwell’s demons in the Nature.

Preprint ARTICLE | doi:10.20944/preprints202011.0047.v1

Stacking Effects on Anthraquinone/DNA Charge-Transfer Electronically Excited States

Gustavo Cárdenas, Juan J. Nogueira

Subject: Chemistry And Materials Science, Analytical Chemistry Keywords: Photodynamic Therapy; Charge Transfer; Electronically Excited States; Anthraquinone; DNA; Molecular Dynamics; TD-DFT; Transition-Density Analysis

Online: 2 November 2020 (14:15:09 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.2039.v1

Assessment of Hygroscopic Behavior of Arctic Aerosol by contemporary Lidar and Radiosonde Observations

Nele Eggers, Sandra Graßl, Christoph Ritter

Subject: Environmental And Earth Sciences, Remote Sensing Keywords: Arctic Aerosol; Lidar; hygroscopic growth

Online: 25 July 2024 (12:05:01 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201607.0008.v1

Spectral and Polarization Signatures of Relativistic Shocks in Blazars

Markus Boettcher

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: active galaxies; blazars; jets; polarization; shock acceleration

Online: 8 July 2016 (03:03:04 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201702.0040.v1

Ozone Variability over Egypt

Ayman Badawy, Heshmat Abdel Basset, Mohamed Eid

Subject: Physical Sciences, Applied Physics Keywords: total ozone; seasonal variation; analysis trend; homogeneity; abrupt change

Online: 13 February 2017 (11:34:19 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1974.v1

Tsallis Q-statistics Fingerprints in Precipitation Data Across Sicily

Vera Pecorino, Alessandro Pluchino, Andrea Rapisarda

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: Tsallis q-statistics; Sicily rainfall data; climate change

Online: 29 May 2024 (12:08:44 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202409.0451.v1

Polynitrobenzene Derivatives, Containing -CF3, -OCF3, and -O(CF2)nO- Functional Groups, as Candidates for Perspective Fluorinated High-Energy Materials: Theoretical Study

Jelena Tamuliene, Jonas Sarlauskas

Subject: Physical Sciences, Atomic And Molecular Physics Keywords: nitro compounds; polynitrobenzenes; fluorinated high-energy materials (F-HEMs); energetic properties; density; detonation pressure; detonation velocity; oxygen balance; stability; sensitivity

Online: 5 September 2024 (10:57:55 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.0221.v1

Solar Wind Charge-Exchange X-ray Emissions from the O⁵⁺ Ions in the Earth’s Magnetosheath

Zhicheng Zhang, Fei He, Xiao-Xin Zhang, Guiyun Liang, Xueyi Wang, Yong Wei

Subject: Environmental And Earth Sciences, Space And Planetary Science Keywords: solar wind charge-exchange (SWCX); earth magnetosheath; X-Ray spectrum; interplanetary shock; bow shock; Magnetopause

Online: 2 April 2024 (15:13:11 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.0295.v1

Microwave-Assisted Synthesis of TiO₂ Nanoparticles: Optimization and Characterization

Debora Briševac, Ivana Gabelica, Davor Ljubas, Arijeta Bafti, Gordana Matijašić, Lidija Ćurković

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: titanium dioxide; microwave-assisted synthesis; characterization

Online: 6 May 2024 (12:56:11 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202404.0460.v1

Quantum Correlation Enhanced Optical Imaging

Siddhant Vernekar, Jolly Xavier

Subject: Physical Sciences, Optics And Photonics Keywords: Quantum photonics, Quantum imaging, Quantum correlations, Quantum key distribution, Quantum sensing

Online: 8 April 2024 (13:53:54 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202106.0498.v1

On the Low-Lying Electronically Excited States of Azobenzene Dimers: Transition Density Matrix Analysis

Evgenii Titov

Subject: Chemistry And Materials Science, Theoretical Chemistry Keywords: azobenzene; transition density matrix; exciton; charge transfer; excited states; TD-DFT; ADC(2)

Online: 21 June 2021 (10:20:13 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202407.0243.v1

Functionalization of Polypropylene by TiO2 Photocatalytic Nanoparticles: On the Importance of the Surface Oxygen Plasma Treatment

Karolina Zajac, Joanna Macyk, Konrad Szajna, Franciszek Krok, Wojciech Macyk, Andrzej Kotarba

Subject: Chemistry And Materials Science, Surfaces, Coatings And Films Keywords: TiO2; polypropylene; surface functionalization; plasma treatment; nanocomposite; photocatalyst

Online: 2 July 2024 (14:05:28 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201703.0111.v1

Open Hardware and Software Star Tracker: An Opportunity for Collaboration in the Emerging Cubesat Community

Samuel T. Gutierrez, Cesar I. Fuentes, Marcos A. Diaz

Subject: Engineering, Control And Systems Engineering Keywords: star tracker; attitude determination; CubeSat

Online: 16 March 2017 (07:12:22 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202402.1088.v1

Retarded Gravity in Disk Galaxies

Yuval Glas, Tomer Zimmerman, Asher Yahalom

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Dark Matter; MOND; Retardation; General Relativity

Online: 20 February 2024 (11:28:30 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202406.1924.v1

The Role of the Mediterranean Diet in Assisted Reproduction: A Literature Review

Dimitris Baroutis, Theodoros Kalampokas, Eleni Katsianou, Alexandros Psarris, George Daskalakis, Konstantinos Panoulis, Makarios Eleftheriades

Subject: Medicine And Pharmacology, Obstetrics And Gynaecology Keywords: Mediterranean Diet; Infertility; Fertility; Assisted Reproductive Techniques; Assisted Reproduction; ART; IVF

Online: 28 June 2024 (04:06:20 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201702.0022.v1

PHB Production in Biofermentors Assisted through Biosensor Applications

Palmiro Poltronieri, Valeria Mezzolla, Oscar Fernando D'Urso

Subject: Physical Sciences, Optics And Photonics Keywords: Cupriavidus necator; E. coli; bofermentors; biosensors; growth phase; biosynthetic pathways; P(3HB); PHB: polyhydroxybutyrate,; spectrofluorometry; SERS: Surface Enhanced Raman Spectroscopy; turbidity as optical density (OD)

Online: 8 February 2017 (09:31:07 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.0583.v1

Ultrasound Assisted Alkaline Pretreatment of Biomass to Enhance the Extraction Yield of Valuable Chemicals

Adina I. Gavrila, Anamaria Vartolomei, Ioan Calinescu, Mircea Vinatoru, Oana C. Parvulescu, Grigore Psenovschi, Petre Chipurici, Adrian Trifan

Subject: Biology And Life Sciences, Agricultural Science And Agronomy Keywords: ultrasound; lignin; wood residue; enzymatic hydrolysis

Online: 8 April 2024 (15:38:08 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.0391.v1

Laser-Assisted versus Open Cordectomy for Early Glottic Cancer

Christine Langer, Florian Glatt, Steffen Wagner, Michael Knitschke, Shachi Jenny Sharma, Claus Wittekindt

Subject: Medicine And Pharmacology, Otolaryngology Keywords: cordectomy; open approach; functional outcome; early glottic cancer; head and neck cancer

Online: 6 June 2024 (12:40:32 CEST)

Show abstract| Download PDF| Share

Purpose: Early glottic cancer is a highly curable malignancy. Disease control is achieved by resec-tion or external beam radiation with similar long-term results according survival. Surgery is predominantly performed by transoral endoscopic approach, due to reduced complication rates when compared to open cordectomy. Open cordectomy might still be warranted in cases of inad-equate surgical accessibility. Aim of the present study was to compare endoscopic versus open approach in relation to complications and outcome in an up-to-date patient group. Methods: 219 patients underwent primary tumor resection in early glottic cancer (UICC stages I-II). 168 opera-tions were performed endoscopically, 51 operations were open transcervical cordectomies. We compared survival data with non-parametric methods and functional outcome according to need of tracheostomy, feeding tube and voice functional outcome following ELS protocol. Results: There were no significant differences in overall survival (OS). 2 years OS after endoscopic surgery was 90.5% vs 95.3% after transcervical resection. As expected, OS in T1b and T2 tumors was worse than in T1a tumors. We found a statistically significant difference in disease free survival (DFS) within the T1a and T1b/T2 group (Log rank test: p=0.006) but no relevant difference be-tween the two surgical modalities, even when the data was stratified by T-categories performing a Cox regression (hazard ratio 1.21, p=0.712). Patients who underwent open surgery had a sig-nificantly worse peri- and postoperative course with longer hospital stay, higher frequency of tracheotomies and longer need for nasogastric tubes. Functional results were comparable within the two patient groups while higher tumor size / stage was an unfavorable predictor for voice re-habilitation. Conclusion: Open cordectomy leads to more complications but offers comparable oncological and functional outcome when compared to transoral endoscopic approach in early glottic cancer. Open surgery therefore continues to be a valid treatment option when endoscopic resection is not possible.

Preprint ARTICLE | doi:10.20944/preprints202405.1970.v1

Optimization of Enzymatic Assisted Extraction of Bioactive Compounds from Olea Europaea Leaves

Alexios Vardakas, Achilleas Kechagias, Nikolay Penoy, Aris E. Giannakas

Subject: Environmental And Earth Sciences, Sustainable Science And Technology Keywords: plant by-product, antioxidants, green technology, enzyme preparation, polyphenols

Online: 29 May 2024 (11:40:13 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202409.0789.v1

A Comparative Data Augmentation-Assisted Diagnostic Framework for Industrial Centrifugal Pumps

Dong-Yun Kim, Akeem Bayo Kareem, Daryl Domingo, Jangwook HUR

Subject: Engineering, Mechanical Engineering Keywords: centrifugal pump; data augmentation; electric motor; fault classification; gaussian noise; PHM

Online: 10 September 2024 (11:07:18 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202407.0445.v1

From Germ Cells to Implantation: The Role of Extracellular Vesicles

Anna Fazzio, Angela Caponnetto, Carmen Ferrara, Michele Purrello, Cinzia Di Pietro, Rosalia Battaglia

Subject: Biology And Life Sciences, Cell And Developmental Biology Keywords: extracellular vesicles; exosomes; implantation; embryo; gametogenesis; germ cells; microRNAs; biomarkers; blastocoel fluid

Online: 4 July 2024 (11:48:50 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202404.1956.v1

Biosensor-Integrated Virtual Reality (VR) System Assisted CBT and the Alteration of Delusional Perceptions in Psychosis

Aristomenis Alevizopoulos, Maria Alevizopoulou, Jacob Kritikos, Georgios Alevizopoulos

Subject: Medicine And Pharmacology, Psychiatry And Mental Health Keywords: virtual reality (VR); biosensors; psychosis; hallucinations; delusions; cognitive behavioural treatment

Online: 30 April 2024 (07:25:13 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201607.0051.v1

Search for QPOs in the Light Curve of the Blazar OJ287: Preliminary Results from 2015/16 Observing Campaign

S. Zola, M. Valtonen, G. Bhatta, A. Goyal, B. Debski, A. Baran, J. Krzesinski, M. Siwak, S. Ciprini, A. Gopakumar, H. Jermak, K. Nilsson, D. Reichart, K. Matsumoto, K. Sadakane, K. Gazeas, M. Kidger, V. Piirola, F. Alicavus, K.S. Baliyan, A. Berdyugin, D. Boyd, M. Campas Torrent, F. Campos, J. Carrillo Gomez, D.B. Caton, V. Chavushyan, J. Dalessio, D. Dimitrov, M. Drozdz, A. Erdem, A. Escartin Perez, V. Fallah Ramazani, A.V. Filippenko, F. Garcia, F. Gomez Pinilla, M. Gopinathan, J.B. Haislip, J. Harmanen, G. Hurst, K.M. Ivarsen, M. Jelinek, A. Joshi, M. Kagitani, N. Kaur, N. Karaman, W.C. Keel, A.P. LaCluyze, B.C. Lee, E. Lindfors, J. Lozano De Haro, J.P. Moore, R. Naves Nogues, A.W. Neely, R.H. Nelson, W. Ogloza, S. Okano, J.C. Pandey, M. Perri, P. Pihajoki, G. Poyner, J. Provencal, T. Pursimo, A. Raj, R. Reinthal, S. Sadegi, T. Sakanoi, J.-L. Salto Gonzales, T. Schweyer, F.C. Soldan Alfaro, E. Sonbas, I. Steele, J.T. Stocke, J. Strobl, L.O. Takalo, T. Tomov, L. Tremosa Espasa, J.R. Valdes, J. Valero Perez, F. Verrecchia, J.R. Webb, M. Yoneda, M. Zejmo, W. Zheng, J. Telting, J. Saario, T. Reynolds, A. Kvammen, E. Gafton, R. Karjalainen, P. Blay

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: active; BL Lacertae objects: individual (OJ 287); super massive black holes

Online: 18 July 2016 (10:46:26 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201703.0137.v1

Microwave-Assisted Catalytic Synthesis of Bio-Based Copolymers from Waste Cooking Oil

Mahrzadi Noureen Shahi, Muhammad Arshad, Aman Ullah

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: waste cooking oil; phthalic anhydride; copolymerization; microwaves

Online: 17 March 2017 (07:36:52 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202409.0633.v1

Artificial Intelligence Assisted Detection and Localization of Spinal Metastases

Edgars Edelmers, Artūrs Ņikuļins, Klinta Luīze Sprūdža, Patrīcija Stapulone, Niks Saimons Pūce, Elizabete Skrebele, Everita Elīna Siņicina, Viktorija Cīrule, Ance Kazuša, Katrina Boločko

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: artificial intelligence; spinal metastases; vertebras segmentation; computer tomography; medical imaging; instance segmentation; radiomics

Online: 9 September 2024 (09:21:17 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.1107.v1

Two-Tier Efficient QoE Optimization for Partitioning and Resource Allocation in UAV-Assisted MEC

Huaiwen He, Xiangdong Yang, Feng Huang, Hong Shen

Subject: Computer Science And Mathematics, Computer Networks And Communications Keywords: Unmanned aerial vehicle; Multi-access edge computing; Task offloading; Large-scale IoT network; Shrinkage ratio

Online: 17 June 2024 (08:02:47 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.1720.v1

Surfactant-Assisted Binder-Free NiCo₂S₄ with Enhanced Electrochemical Performance in Aqueous Supercapacitor Application

Mawuse Amedzo-Adore, Jeong In Han

Subject: Chemistry And Materials Science, Electrochemistry Keywords: NiCo2S4; binder-free; amorphous; crystalline; supercapacitor; asymmetry

Online: 23 August 2024 (10:53:10 CEST)

Show abstract| Download PDF| Share

Preprint TECHNICAL NOTE | doi:10.20944/preprints202404.0807.v1

Computational Intelligence Assisted Less-Expensive Privacy-Preserving Optimization in Audio-Video Content

Amir Parnianifard

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: Computational Intelligence; Privacy-Preserving Optimization; Audio-Visual Content; Evolutionary Computation; Metamodel-Based Learning; Signal Watermarking

Online: 17 April 2024 (02:09:11 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.1301.v1

Next generation blockchain technology: The Entropic Blockchain

Melvin M. Vopson, Serban G. Lepadatu, Anna Vopson, Szymon Łukaszyk

Subject: Computer Science And Mathematics, Information Systems Keywords: Information theory; Information entropy; Blockchain; Entropic barcoding

Online: 19 June 2024 (10:59:03 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.0679.v1

Pycnogenol-Assisted Alleviation of Titanium Dioxide Nanoparticle-Induced Lung Inflammation via Thioredoxin-Interacting Protein Downregulation

Je-Oh Lim, Woong-Il Kim, So-Won Pak, Se-Jin Lee, Changjong Moon, In-Sik Shin, Sung-Hwan Kim, Jong-Choon Kim

Subject: Medicine And Pharmacology, Pharmacology And Toxicology Keywords: Titanium dioxide nanoparticle; lung inflammation; pycnogenol; antioxidative effect; thioredoxin-interacting protein

Online: 9 July 2024 (08:20:44 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201701.0070.v1

Performance Evaluation of a Permanent Magnet-Assisted Synchronous Reluctance Machine with Hybrid Magnets of Ferrite Magnets and Rare-earth PMs

Xiping Liu, Ya Li, Zhangqi Liu

Subject: Engineering, Electrical And Electronic Engineering Keywords: permanent magnet-assisted synchronous reluctance machine; power factor; torque ripple; efficiency; demagnetization; finite element analysis

Online: 13 January 2017 (11:04:02 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202408.1824.v1

Simultaneous Robot-Assisted Radical Prostatectomy and Robot-Assisted Partial Nephrectomy for Synchronous Prostate Cancer and Small Renal Tumors: A Single-Center Experience and Literature Review of Concurrent Robotic Multisite Surgery

Rafał Bogdan Drobot, Marcin Lipa, Weronika Anna Zahorska, Daniel Ludwiczak, Artur Andrzej Antoniewicz

Subject: Medicine And Pharmacology, Urology And Nephrology Keywords: robotic surgery; robot-assisted partial nephrectomy; robot-assisted radical prostatectomy; concurrent multisite surgery; synchronous prostate and kidney cancers

Online: 26 August 2024 (12:06:46 CEST)

Show abstract| Download PDF| Share

Introduction: This review explores the literature and presents institutional cases of concurrent robotic multisite surgery—in particular, robot-assisted radical prostatectomy (RARP) and robot-assisted partial nephrectomy (RAPN) for synchronous prostate and kidney cancers. We highlight dual-console synchronous robotic procedures, emphasizing the unique docking tech-nique developed. Aim: The aims of the study were to evaluate the feasibility, safety, and clinical outcomes of concurrent RARP and RAPN for synchronous prostate cancer and small renal tumors, as well as other concurrent robotic multisite surgeries, and to compare institutional findings with the existing literature. Materials and Methods: We describe the unique docking technique used in our procedures, which facilitates atraumatic transitions between surgeries using the same port sites. Additionally, eligible studies on concurrent robotic multisite surgery that were published in English were retrieved from the MEDLINE, Embase, and Cochrane Library databases. Data on operative time, blood loss, complications, and postoperative outcomes were extracted. Results: Eight cases from our institution demonstrated the feasibility and safety of the proposed approach, which is consistent with previous reports. The unique docking technique and dual-console setup enhance surgical precision, offering significant benefits in patient outcomes. As part of the litera-ture review, nine retrospective studies involving 40 cases of concurrent RARP and RAPN were reviewed. Additionally, eleven retrospective studies involving 392 cases of concomitant RARP and robotic transabdominal preperitoneal inguinal hernia repair (RTAPPIHR) were analyzed. Conclusions: Concurrent RARP and RAPN for synchronous prostate and kidney tumors is a viable and effective approach. Our early experience suggests that this and other combined procedures can optimize patient care and reduce costs. Prospective trials are needed to validate these findings and further refine the techniques.

Preprint ARTICLE | doi:10.20944/preprints202405.0282.v1

Chalcogen-Bond-Assisted Formation of the N→C Dative Bonds in the Complexes between Chalcogenadiazoles/Chalcogenatriazoles and Fullerene C₆₀

Yu Zhang, Weizhou Wang

Subject: Chemistry And Materials Science, Theoretical Chemistry Keywords: N→ C dative bond; chalcogen bond; chalcogenadiazole; fullerene C₆₀

Online: 6 May 2024 (09:59:15 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202403.1045.v1

A Machine Learning-Assisted Classification Algorithm for the Detection of Archaeological Proxies (Cropmarks) Based on Reflectance Signatures

Athos Agapiou, Elias Gravanis

Subject: Environmental And Earth Sciences, Remote Sensing Keywords: archaeological proxies; cropmarks formation; subsurface archaeological remains; detection; machine-learning; spectral signatures

Online: 19 March 2024 (06:49:47 CET)

Show abstract| Download PDF| Share

Detection of subsurface archaeological remains using a range of remote sensing methods, poses several challenges until today. Recent studies regarding the detection of archaeological proxies like those of cropmarks highlight the complexity of the phenomenon. In this work we present three different methods, and associated indices, for identifying stressed reflectance signatures indicating buried archaeological remains, based on a dataset of measured ground spectroradiometric reflectance. Several spectral profiles between the visible and near infrared part of the spectrum, were taken over a controlled environment in Cyprus during the 2011-2012 and are re-used in this study. The first two (spectral) methods are based on a suitable analysis of the spectral signatures in (1) the visible part of the spectrum, and in particular in the neighborhood of 570 nm, and (2) the red edge-near infrared part of the spectrum, in the neighborhood of 730 nm. Machine learning (decision trees) allows for the deduction of suitable wavelengths to focus on, in order to formulate the proposed indices and the associated classification criteria (decision boundaries) that can enhance the detection probability of stressed vegetation. Noise in the signal is taken into account by simulating reflectance signatures perturbed by white noise. Applying decision tree classification on the ensemble of simulations and basic statistical analysis we refine the formulation of the indices and criteria for the noisy signatures. The success rate of the proposed methods is over 90%. The third method rests on the estimation of vegetation/canopy reflectance parameters through inversion of the physical-based PROSAIL reflectance model and the associated classification through machine learning methods. The obtained results provide further insights into the formation of stress vegetation that occurred due to the presence of shallow buried archaeological remains, which are well aligned with physical-based models and existing empirical knowledge. To the best of the authors' knowledge, this is the first study demonstrating the usefulness of radiative transfer models such as PROSAIL for understanding the formation of cropmarks. Similar studies can support future research directions towards the development of regional remote sensing methods and algorithms if systematic observations are adequately dispersed in space and time.

Preprint ARTICLE | doi:10.20944/preprints202403.0629.v1

Comparison of Drone-Assisted Maize Seedling Detection Models Based on Deep Learning

Zhijie Jia, Xinglong Zhang, Hongye Yang, Yuan Lu, Jiale Liu, Xun Yu, Dayun Feng, Kexing Gao, Jianfu Xue, Bo Ming, Chenwei Nie, Shaokun Li

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: Maize Seedling Detection; Counting; Unmanned Aerial Vehicle

Online: 12 March 2024 (04:25:00 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.2367.v1

Association between Subclinical Hypothyroidism and Adverse Pregnancy Outcomes in Assisted Reproduction Technology Singleton Pregnancies: A Retrospective Study

Yuichiro Narita, Hiroyuki Tsuda, Eri Tsugeno, Yumi Nakamura, Miho Suzuki, Yumiko Ito, Atsuko Tezuka, Tomoko Ando

Subject: Medicine And Pharmacology, Obstetrics And Gynaecology Keywords: ART; preterm birth; subclinical hypothyroidism; thyroid stimulating hormone; levothyroxine therapy

Online: 30 July 2024 (04:38:36 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.2388.v1

Wastewater Management Using a Neural Network-Assisted Novel Paradigm for Waste Prediction from Vermicomposting

M. Thanjaivadivel, R. Suguna, G. Arulkumaran, M. Bala Anand, Claudia Cherubini

Subject: Engineering, Civil Engineering Keywords: Balz-Schiemann; Chemical Equilibrium; Chemical Liability; Gaas Waste Management; Neural Network; Vermicomposting

Online: 30 July 2024 (07:33:13 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.2027.v1

A New Air Assisted Flare Tip Design for Managing Gas Flare Emissions (CFD Analysis)

Ahmed A Maaroof, Joseph D Smith, Mohammed H S Zangana

Subject: Engineering, Chemical Engineering Keywords: CFD; Gas Flare; Soot Emissions; CE; DRE

Online: 26 July 2024 (04:26:13 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.1920.v1

Fabrication of Graphene Oxide and Conductive Polymer on Cotton Fabric with Ultrasonic (US) Assisted Dyeing for Washable E-Textiles

Nazakat Ali Khoso, Arsalan Ahmed Sheikh, Sanam Irum Memon, Raja Fahad Qureshi, Abdul Malik Rehan Abbasi, Syed Qutaba, JiaJun Wang

Subject: Engineering, Other Keywords: Graphene, Graphene Oxide, reduced Graphene Oxide, Cold pad Dyeing, Wearable, E-textiles

Online: 27 June 2024 (11:00:40 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202003.0041.v1

Effect of Ultrasonic-assisted and Microwave-assisted Technology on Bioactive Compounds and Aroma Quality of Instant Green Tea

Xiaozhou Zhou, Xiuhua Fu, Zhusheng Fu, Xingqian Ye

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: ultrasonic wave; microwave; instant green tea; extraction rate; active components; aroma

Online: 3 March 2020 (11:38:20 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.0762.v1

High-Throughput Drug Stability Assessment via Biomimetic Metalloporphyrin Catalyzed Reactions Using Laser-Assisted Rapid Evaporative Ionization Mass Spectrometry (LA-REIMS)

András Marton, Zsombor Márton Mohácsi, Balázs Decsi, Balázs Csillag, Júlia Balogh, Richárd Schäffer, Tamás Karancsi, György Tibor Balogh

Subject: Chemistry And Materials Science, Medicinal Chemistry Keywords: high-throughput screening; metabolic stability; ambient mass spectrometry; LA-REIMS; biomimetic metalloporphyrin; lead profiling; in vitro models; drug metabolism

Online: 12 June 2024 (14:15:32 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201701.0036.v1

Optimization of Ultrasonic-Assisted Extraction by Response Surface Methodology with Maximal Phenolic Yield and Antioxidant Activity from Acer truncatum Leaves

Lingguang Yang, Peipei Yin, Hang Fan, Qiang Xue, Ke Li, Xiang Li, Liwei Sun, Yujun Liu

Subject: Biology And Life Sciences, Plant Sciences Keywords: Acer truncatum leaves; ultrasonic-assisted extraction; response surface methodology; phenolics; antioxidant activity; UPLC-QTOF-MS/MS

Online: 9 January 2017 (04:16:01 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202308.2052.v1

Deep Learning-Based Link Quality Estimation for RIS-Assisted UAV-Enabled Wireless Communications System

Belayneh Abebe Tesfaw, Rong-Terng Juang, Li-Chia Ta, Hsin-Piao Lin, Getaneh Berie Tarekegn, And Kabore Wendenda Nathanael

Subject: Computer Science And Mathematics, Computer Networks And Communications Keywords: Link quality estimation; reconfigurable intelligent surfaces (RIS); gated recurrent unit (GRU); unmanned aerial vehicle (UAV).

Online: 30 August 2023 (11:39:45 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202408.1950.v1

Quantum-Machine-Assisted Drug Discovery: Survey and Perspective

Yidong Zhou, Weikang Li, Gopal Karemore, Marinka Zitnik, Frederic Chong, Junyu Liu, Tianfan Fu, Zhiding Liang

Subject: Physical Sciences, Quantum Science And Technology Keywords: Quantum Computing; Drug Discovery; Clinical Trails; Quantum Algorithms

Online: 27 August 2024 (11:10:12 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1930.v1

Algorithmic Implementation to Visually Controlled Interception: Harmonic Ratios and Stimulation Invariants

Wangdo Kim, Duarte Araujo, MooYoung Choi, Albert Vette, Eunice Ortiz

Subject: Engineering, Bioengineering Keywords: algorithmic implementation to perception; dynamic interception; harmonic ratios; stimulation invariants; motion perception

Online: 29 May 2024 (08:26:59 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202205.0416.v1

HyperDbg: Reinventing Hardware-Assisted Debugging

Mohammad Sina Karvandi, Mohammad Hosein Gholamrezaei, Saleh Khalaj Monfared, Soroush Medi, Behrooz Abbassi, Ali Amini, Reza Mortazavi, Saeid Gogin, Dara Rahmati, Michael Schwarz

Subject: Computer Science And Mathematics, Information Systems Keywords: Hypervisor; Debugging; Kernel-debugger; Fuzzing

Online: 31 May 2022 (09:41:16 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.0233.v1

High-Efficiency Extraction of Flavonoids from Flos Sophorae Immaturus Using Ultrasound-Assisted Deep Eutectic Solvent: Optimization and Antioxidant Activity

Xinrui Yang, Ziyan Zhang, Yifeng Zhang

Subject: Chemistry And Materials Science, Food Chemistry Keywords: Flos Sophorae Immaturus; deep eutectic solvent; ultrasound-assisted extraction; flavonoid; response surface methodology; antioxidant activity

Online: 5 August 2024 (11:25:31 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.1811.v1

Comparison of the Stability of a Camu-camu Extract Dried and Encapsulated by Means of High Throughput Electrospraying Assisted by Pressurized Gas

Juan David Escobar-García, Cristina Prieto, Emma Talon, Jose Maria Lagaron

Subject: Biology And Life Sciences, Food Science And Technology Keywords: Camu camu extract; room-temperature drying; encapsulation; microparticles; whey protein concentrate; zein; EAPG

Online: 26 August 2024 (11:57:10 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202402.1189.v1

Preparation of Ultrasound-Assisted Herbal Coffee Infusion, Bioaccessibility of Phenolic Compounds and Their Antioxidant, Anti-diabetic, and Anti-Alzheimer Potential

Akhtar Ali

Subject: Biology And Life Sciences, Food Science And Technology Keywords: rosemary; coffee; diabetes; phenolic compounds; functional foods; antioxidants; human health

Online: 21 February 2024 (04:38:09 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.1149.v1

Computerized Penetrometry Methodology Assisted by Advanced Algorithms Applied in the Multi-dimensional Analysis of the Rheology of Mold-Ripened Cheeses and Its Impact on Food Product Quality

George Ipate, Gratiela Florinela Pana, Filip Ilie

Subject: Biology And Life Sciences, Food Science And Technology Keywords: mold; cheese; penetration; apparent viscosity

Online: 16 August 2024 (02:58:59 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.0363.v1

High–Redshift Quasars at z

z \geq 3

Yulia Sotnikova, Alexander Mikhailov, Timur Mufakharov, Tao An, Dmitry Kudryavtsev, Marat Mingaliev, Roman Udovitskiy, Anastasia Kudryashova, Vlad Stolyarov, Tamara Semenova

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies; active; galaxies; high-redshift; quasars; general; radio continuum; galaxies

Online: 4 April 2024 (10:08:42 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201607.0026.v1

Microscopic Processes In Global Relativistic Jets Containing Helical Magnetic Fields

Kenichi Nishikawa, Yosuke Mizuno, Jacek Niemiec, Oleh Kobzar, Martin Pohl, Jose Gomez, Ioana Dutan, Asaf Pe’er, Jacob Frederiksen, Aake Nordlund, Athina Meli, Helene Sol, Phil Hardee, Dieter Hartmann

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: relativistic jets; particle-in-cell simulations; global jets; helical magnetic fields; kinetic instabilities; kink instability

Online: 13 July 2016 (05:37:49 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202308.0663.v1

IRS Assisted Hybrid Secret Key Generation

Meixiang Zhang, Ziyue Zhuang, Sooyoung Kim

Subject: Engineering, Telecommunications Keywords: secret key generation; intelligent reflecting surface; phase quantization

Online: 9 August 2023 (03:14:23 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201904.0170.v1

Mapping Research in Assisted Reproduction Worldwide

D. García, Francesco Alessandro Massucci, Alessandro Mosca, Ismael Ràfols, A. Rodríguez, R. Vassena

Subject: Medicine And Pharmacology, Pediatrics, Perinatology And Child Health Keywords: topic modelling; latent dirichlet allocation; text mining; assisted reproduction; ART; IVF

Online: 15 April 2019 (12:25:12 CEST)

Show abstract| Download PDF| Share

Study question: What are the current trends of research in Human Assisted Reproduction around the world? Summary answer: USA is the leading country, followed by the UK, China, France and Italy. The largest research area is “laboratory techniques”, although other areas such as “public health”, “quality, ethics and law” and “female factor” are gaining ground worldwide. What is known already: Scientific research, especially in health and medical sciences, aims at addressing specific needs that society (and, especially, patients) perceives as pressing. One of the main challenges for policymakers and research funders alike is therefore to align research priorities to societal needs. We can thus think of research agendas in terms of a demand side (societal needs) and a supply side (research outputs). Research output in Human Assisted Reproduction has expanded in the past years, as indicated by the increasing number of scientific publications in indexed journals in this area. Nevertheless, no map of research related to assisted reproduction has been produced so far, hindering the identification of potential areas of improvement and need. Study design, size, duration: 26,000+ scientific publications (articles, letters, and reviews) on Human Assisted Reproduction produced worldwide between 2005 and 2016 were analyzed. These publications were indexed in PubMed or obtained from reference list of indexed publications included in the analysis.Participants/materials, setting, methods: The corpus of publications was obtained by combining the MeSH terms: “Reproductive techniques”, “Reproductive medicine”, “Reproductive health”, “Fertility”, “Infertility”, and “Germ cells”. Then it was analyzed by means of text mining algorithms (Topic Modeling (TM) based on Latent Dirichlet Allocation (LDA)), in order to obtain the main topics of interest. Finally, these categories were analyzed across world regions and time. Main results and the role of chance: We identified 44 main topics, which were further grouped in 11 macro categories, form larger to smaller: “laboratory techniques”, “male factor”, “quality, ethics and law”, “female factor”, “public health and infectious diseases”, “basic research and genetics”, “pregnancy complications and risks”, “general infertility and ART”, “psychosocial aspects”, “cancer”, and “research methodology”. The USA was the leading country in number of publications, followed by the UK, China, France and Italy. Interestingly, research contents in high income countries is fairly homogeneous across macro-categories, and it is dominated by “laboratory techniques” in Western and Southern Europe, and by “quality, ethics and law” in North America, Australia and New Zealand. In middle income countries we observe that research is mainly performed on “male factor”, and noticeably less on “female factor”. Finally, research on “public health and infectious diseases” predominates in low-income countries. Regarding temporal evolution of research, “laboratory techniques” is the most abundant topic on a yearly basis, and relatively constant over time. However, since production in most of the other categories is increasing, the relative contribution of this research category is actually decreasing. Publication is especially increasing in “public health and infectious diseases” (in all world regions, but especially in low income countries), “quality, ethics and law” (high income countries), and “female factor” (middle income countries). Limitations, reasons for caution: Three main factors might limit the robustness of our work: the textual corpus analyzed is based on abstract and titles, the reproducibility of the stochastic algorithms applied, which may produce slightly differing results at each run, and the interpretation of the topics obtained. Wider implications of the findings: This study should prove beneficial in the design of research strategies and policies that foster the alignment between supply (assisted reproduction research) and demand (society). Study funding/competing interest(s): PTQ-14-06718 of the Spanish MINECO Torres Quevedo programme (FAM).

Preprint ARTICLE | doi:10.20944/preprints202404.0580.v1

Doppler Tomography of the Circumstellar Disk of the Be Star κ Draconis

Ilfa A. Gabitova, Anatoly S. Miroshnichenko, Sergey V. Zharikov, Ainash Amantayeva, Serik A. Khokhlov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: spectroscopy; Doppler tomography; binary system; emission-line stars; circumstellar matter; variable stars

Online: 9 April 2024 (07:11:44 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202404.0431.v1

Twenty-Year Climatology of Solar UV and PAR in Cyprus: Integrating Satellite Earth Observations with Radiative Transfer Modeling

Konstantinos Fragkos, Ilias Fountoulakis, Georgia Charalampous, Kyriakoula Papachristopoulou, Argyro Nisantzi, Diofantos Gl. Hadjimitsis, Stelios Kazadzis

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: Ultraviolet Radiation; Erythema; UV-Index; Photosynthetically Active Radiation

Online: 5 April 2024 (10:44:07 CEST)

Show abstract| Download PDF| Share

In this study, we present comprehensive climatologies of effective ultraviolet (UV) quantities and photosynthetically active radiation (PAR) over Cyprus for the period 2004 to 2023, leveraging the synergy of earth observation (EO) data and radiative transfer model simulations. The EO dataset, encompassing satellite and re-analysis data for aerosols, total ozone column, and water vapor, alongside cloud modification factors, to capture the nuanced dynamics of Cyprus's atmospheric conditions. With a temporal resolution of 15 minutes and a spatial of 0.05°x0.05°, these climatologies undergo rigorous validation against established satellite datasets and are further evaluated through comparisons with ground-based global horizontal irradiance measurements provided by the Meteorological Office of Cyprus. This dual-method validation approach not only underscores the models' accuracy but also highlights their proficiency in capturing intra-daily cloud coverage variations. Our analysis extends to investigating the long-term trends of these solar radiation quantities, examining their interplay with changes in cloud attenuation, aerosol optical depth (AOD), and total ozone column (TOC). Significant decreasing trends in the noon ultraviolet index (UVI), of -2 to -4% per decade have been found in Autumn, especially marked on the island’s Northeastern part, mainly originating from the (significant) positive trends in TOC. The significant decreasing trends in TOC, of -2 to -3% per decade that were found in Spring do not result in correspondingly significant positive trends in the noon UVI since variations in cloudiness and aerosols also have a strong impact on the UVI in this season. The seasonal trends in the Daylight Integral (DLI) were generally not significant. These insights provide a valuable foundation for further studies aimed at developing public health strategies and enhancing agricultural productivity, highlighting the critical importance of accurate and high-resolution climatological data.

Preprint ARTICLE | doi:10.20944/preprints202409.0067.v1

3D Light-Direction Sensor Based on Segmented Concentric Nanorings Combined with Deep Learning

Pengcheng Huang, Peijin Wu, Ziyuan Guo, Zhicheng Ye

Subject: Physical Sciences, Optics And Photonics Keywords: 3D light-direction sensor; deep learning; nanorings; light field reconstruction

Online: 2 September 2024 (07:56:04 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202409.0235.v1

Innovative Polyelectrolyte Multilayer Nanofiltration Membrane Fabricated Through Spin-Spray Assisted Layer-by- Layer Assembly

Farid Fadhillah, Karim Kriaa, Fekri Abdulraqeb Ahmed Ali, Saad Aljlil

Subject: Engineering, Chemical Engineering Keywords: spin-spray coating; layer-by-layer; nanofiltration; reverse osmosis; fouling resistance; polyelectrolyte; multilayer; thin film composite

Online: 4 September 2024 (03:00:33 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202312.1186.v1

Uav-Assisted Cooperative Noma and Ofdm Communication Systems: Analysis and Optimization

Xuan Thuc Kieu, Anh Le-Thi

Subject: Engineering, Telecommunications Keywords: UAV-NOMA; UAV-OFDM; Successive convex optimization SCO; Sum data rate; Block-coordinate gradient descent BCGD.

Online: 19 December 2023 (02:57:47 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201910.0027.v1

Microfluidics-Assisted Size Tuning and Biological Evaluation of PLGA Particles

Maria Camilla Operti, Yusuf Dölen, Jibbe Keulen, Eric A.W. van Dinther, Carl G. Figdor, Oya Tagit

Subject: Chemistry And Materials Science, Biomaterials Keywords: PLGA; drug delivery systems; microfluidics; nanoparticles; microparticles

Online: 2 October 2019 (09:21:39 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202409.0917.v1

Real Life Comparative Analysis of Robotic Assisted versus Laparoscopic Radical Prostatectomy in a Single Centre and Single Surgeon Experience

Stefano Salciccia, Valerio Santarelli, Giovanni Battista Di PIerro, Francesco Del Giudice, Giulio Bevilacqua, Giovanni Di Lascio, Alessandro Gentilucci, Roberta Corvino, Valentina Brunelli, Greta Basile, Carlo Maria Scornajenghi, Lorenzo Santodirocco, Luca Gobbi, Davide Rosati, Martina Moriconi, Valeria Panebianco, Fabio Massimo Magliocca, Daniele Santini, Mattia Alberto Di Civita, Flavio Forte, Marco Frisenda, Giorgio Franco, Alessandro Sciarra

Subject: Medicine And Pharmacology, Urology And Nephrology Keywords: prostatic neoplasm; radical prostatectomy; robotic surgery; laparoscopic surgery

Online: 12 September 2024 (11:01:00 CEST)

Show abstract| Download PDF| Share

Background: The advantage of a robotic assisted (RARP) over a laparoscopic (LRP) approach in radical prostatectomy (RP) remains to be demonstrated. Aim of the study is to use a homogeneous population in real life and single surgeon surgery, to analyze the oncological and functional results based on the type of the surgical approach. Methods: This is a prospective trial on non-metastatic prostate cancers (PC) patients considered after multidisciplinary decision to RP, using RARP or LRP. A real-life setting was analyzed at our Urological Departments, using homogeneous criteria for the management of PC cases and a one surgeon experience on 444 cases (284 LRP and 160 RARP) .Results: Mean operative time was significantly lower in RARP (173.33±44.3 min) than in LRP (153.21±25.1 min) (p<0.001). In cases submitted to an extended lymph node dissection (eLND), the mean number of lymph nodes removed was 15.16±7.83 and 19.83±4.78 respectively in LRP and RARP procedures (p<0.001), but positive lymph nodes (pN1) were similarly found in 15.8% of LRP patients and 13.6% of RARP patients (p=0.430). Surgical margins (SM) positivity was not significantly higher in RARP group (20.0%) when compared to LRP group (15.9%) (p=0.145). During the postoperative follow-up, a biochemical recurrence (BCR) was detected in 14.4% and 7.5% of cases in the LRP and RARP group respectively (p=0.014). Better results of PAD test at 3-month interval using RARP approach (mean pad weight 75.57±122 grams and 14±42 grams respectively in LRP and RARP (p<0.01)) were described. Conclusions: In the comparison between RARP and LRP approach, a clear advantage of the robotic approach is a significant reduction in operating times, days of hospitalization and postoperative catheterization compared to laparoscopic surgery. It is not possible to describe any certain oncological advantage both in terms of surgical margins and pathological lymph nodes removed. In RARP cases a reduction to the limit of significance is described in terms of biochemical recurrence. RARP produces a more rapid recovery of urinary continence at 3 months postoperatively without significant advantages in terms of erective potency recovery.

Preprint ARTICLE | doi:10.20944/preprints201909.0283.v1

Using Bonsai as Nature Assisted Art Psychotherapy

Caroll Hermann

Subject: Social Sciences, Psychology Keywords: well-being; mental health; bonsai; art; psychotherapy

Online: 25 September 2019 (10:24:02 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201906.0190.v1

Force Prediction in Ultrasonic Vibration-Assisted Milling

Yixuan Feng, Fu-Chuan Hsu, Yu-Ting Lu, Yu-Fu Lin, Chorng-Tyan Lin, Chiu-Feng Lin, Ying-Cheng Lu, Steven Y. Liang

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: force; ultrasonic vibration; modeling; milling

Online: 20 June 2019 (03:48:07 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201802.0168.v1

Vibration Assisted Handling of Dry Fine Powders

Paul Dunst, Peter Bornmann, Tobias Hemsel, Walter Sextro

Subject: Engineering, Mechanical Engineering Keywords: powder handling, flowability, dosing, transport, mixing, dispersion, piezoelectric actuators, vibrations

Online: 26 February 2018 (16:00:40 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.0564.v1

Assessment and Optimization of Electrophoretic Deposition Assisted Polishing on Metals and Ceramics

Shivam Pradeep Yadav, Raju S Pawade

Subject: Engineering, Mechanical Engineering Keywords: Electrophoretic deposition; Percentage reduction in surface roughness; polishing

Online: 8 July 2024 (08:32:07 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202306.0601.v1

Development of AI and Robotics Assisted Automated Pavement Crack Evaluation System

Md. Al-Masrur Khan, Regidestyoko Wasistha Harseno, Seong-Hoon Kee, Abdullah-Al Nahid

Subject: Engineering, Civil Engineering Keywords: crack detection; deep learning; mobile robotic system; NDE analysis; pavement inspection

Online: 8 June 2023 (08:16:00 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1682.v1

Landslide Risk Assessments through Multicriteria Analysis

Fatma Zohra Chaabane, Salim Lamine, Mohamed Said Guettouche, Nour El Islam Bachari, Nassim Hallal

Subject: Environmental And Earth Sciences, Remote Sensing Keywords: Landsat Data Continuity; image processing; ArcGIS; Analytical Hierarchy Process; weighted sum; Multicriteria Analysis

Online: 27 May 2024 (06:57:37 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.0876.v1

Performance Optimization of Voice-Assisted File Management Systems

Jeyadev Needhi, Ram Prasath G, Vishnu G, Deepesh Vikram KK

Subject: Computer Science And Mathematics, Computer Science Keywords: Voice Assistant, File System Management; NLP (Natural Language Processing); ASR (Automatic Speech Recognition); Pyaudio; Pyspeech; User Experience; Pyttsx; Human-Computer Interaction

Online: 13 June 2024 (03:37:49 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202402.0209.v1

Management of Donkeys in Assisted Interventions: a Snapshot

Lucia Sobrero, Emanuela Dalla Costa, Michela Minero

Subject: Biology And Life Sciences, Animal Science, Veterinary Science And Zoology Keywords: animal welfare; donkey welfare; animal-assisted interventions; donkey-assisted interventions

Online: 5 February 2024 (03:45:41 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202305.1685.v1

Isotope Detection in Microwave-Assisted Laser-Induced Plasma

Ali M. Alamri, Jan Viljanen, Philip Kwomg, Zeyad T. Alwahabi

Subject: Chemistry And Materials Science, Analytical Chemistry Keywords: LIBS; microwave; isotope; plasma; emission

Online: 24 May 2023 (04:17:21 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201909.0092.v1

Internet-Assisted English Reading Teaching Based on Constructivism

Yan Liu, Yan Xu, Hongying Lu

Subject: Social Sciences, Education Keywords: Internet-assisted; English reading teaching; innovative designs; impact; constructivism theory

Online: 9 September 2019 (07:55:44 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202408.2139.v1

Development of an Immersive Virtual Reality System during Robot Assisted Gait Training for Individuals with Neurological Diseases: Feasibility and Proof of Concept Study

Daniele Munari, Angela Vonwartburg, Veronica G. Garcia-Marti, Matjaž Zadravec, Zlatko Matjačić, Jan Veneman

Subject: Biology And Life Sciences, Neuroscience And Neurology Keywords: Virtual Reality Immersion; Robotics; Walking; Neurological disease; Neurorehabilitation

Online: 29 August 2024 (10:19:42 CEST)

Show abstract| Download PDF| Share

Preprint CASE REPORT | doi:10.20944/preprints202405.1106.v1

Dual-Portal Robotic-Assisted Thoracic Surgery (DRATS) and Indocyanine Green-Navigated Segmentectomy

Khrystyna Kuzmych, Carolina Sassorossi, Dania Nachira, Maria Teresa Congedo, Stefano Margaritora, Elisa Meacci

Subject: Medicine And Pharmacology, Surgery Keywords: Robotic Surgery; Lung cancer; Bi portal RATS; Thoracic Surgery

Online: 16 May 2024 (12:23:10 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202402.1386.v1

Synthesis and PASS-Assisted Evaluation of New Heterocyclic Compounds Containing Hydroquinoline Scaffold

Gizachew Mulugeta Manahelohe, Khidmet Safarovich Shikhaliev

Subject: Chemistry And Materials Science, Organic Chemistry Keywords: Heterocyclic Compound; Hydroquinoline; Vilsmeier-Haack Formylation; Quinoline

Online: 23 February 2024 (14:37:44 CET)

Show abstract| Download PDF| Supplementary Files| Share

Now day; the interest for the synthesis of heterocyclic compounds containing hydroquinoline fragments has increased tremendously due to their wide variety of pharmaceutical and industrial applications. This work details the synthesis of linear and fused heterocyclic systems containing hydroquinoline fragments and the pharmacological activity spectra of the synthesized compounds was predicted by in silico method using Prediction of Activity Spectra of Substances (PASS) program. 1,2,2,4-tetramethyl-1,2-dihydroquinoline-6-carbaldehyde 5a was reacted for three hours with a system of hydroxylammonium chloride/pyridinium chloride/toluene to produce 1,2,2,4-tetramethyl-1,2-dihydroquinoline-6-nitrile 7. N-benzyl-2,2,4-trimethyl-1,2,3,4-tetrahydroquinoline-6-carbaldehyde 6b and iodine reacted at room temperature in aqueous ammonia water, followed by aq. treatment with Na2S2O3 and produced N-benzyl-2,2,4-trimethyl-1,2,3,4-tetrahydroquinoline-6-nitrile 8. 30-60% 2-phenyl-1,3-oxazol-5(4H)-ones 9a,b; 10a,b were synthesized via the condensation reaction of N-alkylhydroquinoline-6-carbaldehydes 5a,b; 6a,b with hippuric acid in acetic acid. When activated 7-methylazolopyrimidines 11a,b were reacted with N-alkyl-2,2,4-trimethyl-1,2,3,4-tetrahydroquinoline-6-carbaldehydes 6a,b, the reaction produced 60–70% yield of 7-[(E)-2,2,4-trimethylhydroquinolin-6-ylidenemethyl]azolo[1,5-a]pyrimidin-6-yl carboxylic acids 12a,b. The condensation reaction of 7-hydroxy-1,2,2,4-tetramethyl-1,2-dihydroquinoline 3h with dimethylacetylenedicarboxylate (DMAD) and ethylacetoacetate afforded methyl (Z)-2-(5,7,7,8-tetramethyl-2-oxo-7,8-dihydrofuro[3,2-g]quinolin-3(2H)-ylidene)acetate 16 and 4,6,8,8,9-pentamethyl-8,9-dihydro-2H-pyrano[3,2-g]quinolin-2-one 17, respectively. The condensation reaction of 6-formyl-7-hydroxy-1,2,2,4-tetramethyl-1,2-dihydroquinoline 5e with methylene active compounds ethylcyanoacetate/dimethyl-3-oxopentanedioate/ ethylacetoacetate/diethylmalonate/Meldrum’s acid afforded 3-substituted dihydroquinoline containg coumarins 19 & 21. A pentacyclic coumarin 22 was obtained via the random condensation reaction of malononitrile with 5e in the presence of catalytic amount of piperidine in ethanol. The potential biological activities of the synthesized compounds were evaluated using PASS computer program. According to the prognosis, (E)-4-(N-alkylhydroquinolin-6-yl)-3-buten-2-ones, 13a, b & 14 showed high probability of being active (Pa) as the Gluconate 2-dehydrogenase inhibitor, Anti-allergic, Anti-asthmatic, and Anti-arthritic with the Pa value of 0.849-0.870. It was also found out that hydroquinolinecarbonitrile compounds 7 & 8 have a propensity to act as a good progesterone antagonists, anti-allergic, anti-asthmatic, and anti-arthritic (Pa = 0.276-0.827). Among the coumarin moieties containing hydroquinolines, compounds 17, 19a, and 19c were predicted to be good progesterone antagonists with the Pa values of 0.710, 0.630 and 0.615; respectively.

Preprint REVIEW | doi:10.20944/preprints202312.0246.v1

A Comparison of Clinical Outcomes of Robot-Assisted and Conventional Laparoscopic Surgery

Storm Chabot, Jean Calleja-Agius, Tim Horeman

Subject: Medicine And Pharmacology, Surgery Keywords: robotic surgery; laparoscopy; cholecystectomy; colectomy; hysterectomy; nephrectomy; prostatectomy

Online: 5 December 2023 (14:57:28 CET)

Show abstract| Download PDF| Supplementary Files| Share

Background: Robot-assisted laparoscopic surgery robot-assisted surgical system has gained significant popularity over open and laparoscopic interventions. However, given its high costs, it remains unclear what clinical advantages robot-assisted laparoscopic surgery offers over conventional laparoscopic surgery. Objective: This umbrella review aims to synthesize and compare the clinical outcomes of robot-assisted laparoscopic surgery versus conventional laparoscopic surgery for five surgical procedures. Inclusion criteria: All systematic reviews and meta-analyses published in the past five years that compared the clinical outcomes of conventional laparoscopic surgery and robot-assisted laparoscopic surgery for cholecystectomy, colectomy, hysterectomy, nephrectomy and/or prostatectomy were included. Methods: A systematic literature search was conducted in PubMed and Scopus. The quality of all included reviews was assessed with the AMSTAR 2 quality assessment tool. Each review’s study characteristics (and a list of primary sources) were extracted, along with the quantitative and qualitative data for the following ten clinical outcomes: blood loss, rate of conversion to open surgery, hospitalization costs, incisional hernia rate, intraoperative complication rate, postoperative complication rate, length of hospital stay, operative time, readmission rate and wound infection rate. Results: Fifty-two systematic reviews and (network) meta-analyses were included in this umbrella review, covering more than 1,288,425 patients from 1046 primary sources published between 1996 and 2022. The overall quality of the included reviews was assessed to be low or critically low. Robot-assisted laparoscopic surgery yielded comparable results as conventional laparoscopic surgery in terms of blood loss, conversion to open surgery rate, intraoperative complication rate, postoperative complication rate, readmission rate and wound infection rate for most surgical procedures. While the hospitalization costs of robot-assisted laparoscopic surgery were higher and the operative times of robot-assisted laparoscopic surgery were longer than conventional laparoscopic surgery, robot-assisted laparoscopic surgery reduced the length of hospital stay of patients in nearly all cases. Conclusion: Robot-assisted laparoscopic surgery achieved comparable results with conventional laparoscopic surgery for cholecystectomy, colectomy, hysterectomy, nephrectomy and prostatectomy based on ten clinical outcomes. Further research is needed to prove that robot-assisted laparoscopy is as safe and reliable as conventional laparoscopic surgery.

Preprint ARTICLE | doi:10.20944/preprints202305.0115.v1

PPChain: A Blockchain for Pandemic Prevention and Control Assisted by Federated Learning

Cao Tianruo, Pan Yongqi, Chen Honghui, Zheng Jianming, Hu Tao

Subject: Public Health And Healthcare, Public Health And Health Services Keywords: blockchain; federated learning; pandemic prevention and control; privacy-preserving

Online: 3 May 2023 (08:16:57 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202204.0157.v1

Artificial Intelligence-Assisted Optimization and Multiphase Analysis of Polygon PEM Fuel Cells

Ali Jabbary, Nader Pourmahmoud, Mir Ali Asghar Abdollahi

Subject: Engineering, Energy And Fuel Technology Keywords: PEM fuel cell; optimization; CFD; modeling; neural network; performance

Online: 18 April 2022 (06:19:49 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201806.0094.v1

Tio2 Assisted Photodegradation for Low Substrate Concentrations and Transition Metal Electron Scavengers

Hassan Alsaud, Ahmed Abibat, Roger Painter, Lonnie Sharpe, S.K. Hargrove

Subject: Environmental And Earth Sciences, Waste Management And Disposal Keywords: TiO2; AOP; photodegradation; semiconductor based photocatalysis; reaction kinetics

Online: 6 June 2018 (12:56:35 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202306.1952.v1

The Fertility Outcome of Addition of Assisted Oocyte Activation Into Spindle View-Assisted Intracytoplasmic Sperm Injection in Patients With Low Fertilization Rate

Wei-Che Lo, Chieh-Yu Lin, Chia-Jung Li, Chiung-Hui Hou, Lin-Hsuan Dai, Hsien-Ming Wu

Subject: Medicine And Pharmacology, Obstetrics And Gynaecology Keywords: Assisted oocyte activation; ICSI; polarization microscopy; fertilization failure; blastocyst

Online: 28 June 2023 (05:22:26 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202403.1475.v1

Optical turbulence vertical distribution at the Peak Terskol Observatory and Mt. Kurapdag

Artem Yu. Shikhovtsev ---, Evgeniy A. Kopylov, Sergey A. Potanin, Pavel G. Kovadlo, Chun Qing

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: optical turbulence; profiles; Fried parameter; the air refractive index structure constant Cn2.

Online: 25 March 2024 (11:25:51 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202310.0083.v1

Assisted Requirements Selection by Clustering using Analytical Hierarchical Process

Shehzadi Nazeeha Saleem, Wasi Haider Butt

Subject: Computer Science And Mathematics, Software Keywords: requirements prioritization; next release plan; software product planning; decision support; MoSCoW; AHP; K-Menas; GMM; BIRCH; PAM; hierarchical; clustering; clusters evaluation

Online: 5 October 2023 (14:31:28 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.2156.v1

On IRS-Assisted Covert Communication with a Friendly UAV

Xiaobei Xu, Linzi Hu, Sha Wei, Yuwen Qian, Shihao Yan, Feng Shu, Jun Li

Subject: Engineering, Electrical And Electronic Engineering Keywords: information security; covert communication; intelligent reflectors surface; UAV

Online: 30 May 2023 (13:53:54 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.0689.v1

Cross-Tier Interference Mitigation for RIS-Assisted Heterogeneous Networks

Abdel Nasser Soumana Hamadou, Ciira Wa Maina, Moussa Moindze Soidridine

Subject: Engineering, Telecommunications Keywords: RIS; HetNet; Spectral Efficiency; Cross-tier Interference; Optimization; MIMO

Online: 10 May 2023 (04:54:27 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202304.0449.v1

Blockchain-Assisted Reputation Management Scheme for Internet of Vehicles

Qian Liu, JunQuan Gong, Qilie Liu

Subject: Computer Science And Mathematics, Computer Networks And Communications Keywords: IoV; MEC; Data Sharing; Reputation Management; Subjective Logic Trust Model; Blockchain

Online: 17 April 2023 (10:40:19 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202211.0302.v1

AI for UAV-Assisted IoT Applications : A Comprehensive Review

Nan Cheng, Shen Wu, Xiucheng Wang, Zhisheng Yin, Changle Li, Wen Chen, Fangjiong Chen

Subject: Engineering, Electrical And Electronic Engineering Keywords: AI; UAV; IoT; mobile edge computing; reinforcement learning

Online: 16 November 2022 (09:06:37 CET)

Show abstract| Download PDF| Share

Search Results

38572 articles found