Search | Preprints.org

Preprint ARTICLE | doi:10.20944/preprints202311.1569.v1

Experimental and Numerical Study of the Effect of Carbonate Rock Dissolution on Absolute Permeability of 408 Heterogeneous and Naturally Fractured Samples

Zhibek K. Akasheva, Bakytzhan K. Assilbekov, Darezhat A. Bolysbek, Berik A. Iskakov, Kenbai Sh. Uzbekaliyev, Gani I. Issayev

Subject: Environmental And Earth Sciences, Geophysics And Geology Keywords: Absolute permeability; pore-scale modeling; percolation threshold porosity; dissolution; power law; X-ray microcomputed tomography

Online: 24 November 2023 (11:27:00 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202310.1702.v1

Research on the Shock Environment Characteristics of Marine Diesel Engine Based on a Large Floating Impact Platform

Yu Zhang, Jun Li, Chun hui Zhang, Wei Chen, Zhi peng Du, Xiao bin Li

Subject: Engineering, Marine Engineering Keywords: large-scale floating shock platform (LFSP); shock environments; underwater explosion; marine diesel engines; shock spectra

Online: 26 October 2023 (11:40:15 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202310.1180.v1

Piloting Bioethanol Production from Source-Separated Food Waste Boosts TRL

Fotis Chatzimaliakas, Diogenis Christianides, Dimitris Malamis, Sofia Mai, Elli Maria P. Barampouti

Subject: Environmental And Earth Sciences, Waste Management And Disposal Keywords: Source-separated kitchen waste; Simultaneous saccharification and fermentation; Bioethanol yield; Pilot-Scale; Fresh food waste

Online: 22 October 2023 (09:05:10 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202310.0774.v1

Comparative Study of Two Commercial Brain Volumetry Software: Assessing Medial Temporal Lobe Atrophy

Jimin Kim, Se Won Oh, Jee-Young Kim, Regina EY Kim, Donghyeon Kim

Subject: Medicine And Pharmacology, Neuroscience And Neurology Keywords: Alzheimer’s disease; volumetry software; MRI; medial temporal lobe atrophy; Scheltens’ scale; NeuroQuant®; Aqua®

Online: 12 October 2023 (05:35:02 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202310.0329.v1

Marine Cultural Target Detection for Underwater Robotics Based on Deep Aggregation Network with Deformation Convolution

Yutuo Yang, Wei Liang, Daoxian Zhou, Yinlong Zhang, Gaofei Xu

Subject: Computer Science And Mathematics, Robotics Keywords: autonomous underwater vehicle (AUV); underwater target detection; deformable convolution; multi-scale deep aggregation; attention mechanism

Online: 6 October 2023 (11:51:19 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202309.1174.v1

ENN: Hierarchical Image Classification Ensemble Neural Network for Large-Scale Automated Detection of Potential Design Infringement

Chan Jae Lee, Seong Ho Jeong, Young Yoon

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: Design Right Infringement; Deep Learning; Ensemble Learning; Image Classification; Object Detection; Large-Scale Detection System

Online: 19 September 2023 (03:03:46 CEST)

Show abstract| Download PDF| Share

This paper presents a two-stage hierarchical neural network using image classification and object detection algorithms as key building blocks for a system that automatically detects a potential design right infringement. This neural network is trained to return the Top-N original design right records that highly resemble the input image of a counterfeit. Design rights specify the unique aesthetic characteristics of a product. Due to the rapid change of trends, new design rights are continuously generated. This work proposes an Ensemble Neural Network (ENN), an artificial neural network model that aims to deal with a large amount of counterfeit data and design right records that are frequently added and deleted. At first, we performed image classification and objection detection learning per design right using the existing models with a proven track record of high accuracy. The distributed models form the backbone of the ENN and yield intermediate results aggregated at a master neural network. This master neural network is a deep residual network paired with a fully connected network. This ensemble layer is trained to determine the sub-models that return the best result for a given input image of a product. In the final stage, the ENN model multiples the inferred similarity coefficients to the weighted input vectors produced by the individual sub-models to assess the similarity between the test input image and the existing product design rights to see any sign of violation. Given 84 design rights and the sample product images taken meticulously under various conditions, our ENN model achieved average Top-1 and Top-3 accuracies of 98.409% and 99.460%, respectively. Upon introducing new design rights data, a partial update of the inference model was done an order of magnitude faster than the single model. ENN maintained a high level of accuracy as it scaled out to handle more design rights. Therefore, the ENN model is expected to offer practical help to the inspectors in the field, such as the customs at the border that deal with a swarm of products.

Preprint ARTICLE | doi:10.20944/preprints202309.0676.v1

Remaining Useful Life Prediction of Rolling Bearings Based on Multi-scale Permutation Entropy and SSA-LSTM

Hongju Wang, Xi Zhang, Mingming Ren, Tianhao Xu, Chengkai Lu, Zicheng Zhao

Subject: Engineering, Mechanical Engineering Keywords: remaining useful life; maximum correlation kurtosis deconvolution; multi-scale permutation entropy; long short-term memory

Online: 11 September 2023 (11:30:22 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202308.0762.v1

Burden of Care of Family Caregivers for People Diagnosed with Serious Mental Disorders in a Rural Health District in Kwa-Zulu-Natal, South Africa

Jabulile Thembelihle Ndlovu, Kebogile Elizabeth Mokwena

Subject: Public Health And Healthcare, Public Health And Health Services Keywords: Zarit Burden Interview scale; burden of care; home care giving; severe mental illness; rural setting

Online: 10 August 2023 (05:32:21 CEST)

Show abstract| Download PDF| Share

Jabulile Ndlovu1 and Kebogile Mokwena1, 2 1 Department of Public Health, Sefako Makgatho Health Sciences University, Pretoria, South Africa 2 Research Chair in Substance abuse and population Mental Health, Sefako Makgatho Health Sciences University, Pretoria, South Africa Corresponding author: jabulilendlovu5@gmail.com Abstract An estimated 6% of the world population has serious mental illness, with one in four families having a member with some form of psychiatric disorder, who are mostly cared for by their relatives within a family setting. Although caregiving in a home setting is reported to be associated with significant mental distress, the burden of such distress is rarely measured. The purpose of this study was to quantify the burden of care among family caregivers of relatives with serious mental disorders, as well as to explore possible association between the caregiver burden of care and a range of caregiver and Mental Health Care User (MHCU) variables in a rural district in Kwa-Zulu Natal, South Africa. The Zarit Burden Interview (ZBI) scale was used to collect data from 357 caregivers, and STATA 14 was used to analyze data. The ages of the sample ranged from 18 to 65, with a mean of 50.29, and the majority (86%) were female and unemployed (83%). The ZBI scores ranged from 8 to 85, with a mean of 41.59. The majority (91%) tested positive for caregiver burden of care, which ranged from mild to severe. Using the Pearson Chi-square test of association (p=0.05), variables that were significantly associated with the burden of care were clinically related (caregiver self-reported depression, MHCU diagnosis, recent relapse of the MHCU), socio-economic (caregiver family monthly income, MHCU disability grant status and MHCU employment status) and socio-demographic (MHCU gender and MHCU level of education). The prevalence of burden of care is high and severe, and scarcity of resources in families and communities contribute to the high burden of care in these rural communities.

Preprint ARTICLE | doi:10.20944/preprints202307.0346.v1

Characterisation of the Contact between Cross-Country Skis and Snow: On the Multi-Scale Interaction between Ski Geometry and Ski-Base~Texture

Kalle Kalliorinne, Gustav Hindér, Joakim Sandberg, Roland Larsson, Hans-Christer Holmberg, Andreas Almqvist

Subject: Engineering, Mechanical Engineering Keywords: Cross-Country Skiing; Sports Equipment; Multi-Scale; Contact Mechanics; Ski-Camber Profile; Ski-Base Texture

Online: 5 July 2023 (15:37:49 CEST)

Show abstract| Download PDF| Share

At the highest level of endurance sports, the differences in finishing times are small, so equipment is constantly being constantly improved to enhance the athletes' performance. For instance, one dominant resistive force in connection with cross-country skiing is the friction between the skis and snow and since the 1930s, research designed to understand and reduce this friction has been ongoing. The mechanisms involved in ski-snow friction include compaction, micro-ploughing, adhesion, viscosity, and water-bridging. Of these, adhesive and viscous friction have been most studied, while much less is presently known about compaction, micro-ploughing, and water-bridging. At the macro-scale, the ski-camber profile plays a key role in determining whether, with respect to friction, a particular cross-country ski is suitable for use under a given set of conditions. Through its influence on where ski-snow contact occurs, this ski-camber profile has a profound impact on adhesive and viscous friction, micro-ploughing, the formation of water bridges, and the rate of compaction. Different contact zones with different apparent areas of contact and pressure have been found to be most suitable for different conditions. In addition, the micro-scale texture of the ski base is also an important determinant of ski-snow friction. Topographical measurements of this texture can be achieved with white-light interferometer and recent characterisation has focused on the mechanical properties of contact. In numerous tribological studies the interactions between features at different scales are modelled. In most tribological systems, features on several scales influence friction and ski-snow contact is certainly no exception. Accordingly, the current investigation was designed to evaluate the multi-scale properties of different combinations of two skis with two different base textures. The real area of contact and the average interfacial separation and total average reciprocal interfacial separation between the ski and snow were taken into consideration. We found that different macro- and micro-scale properties of the ski favour different mechanisms of friction. Both the profile of the ski camber and texture of the base play decisive roles in determining viscous friction. At the same time, the texture of the ski base exerts a greater impact on the average real contact pressure, real contact area and minimal average interfacial separation between the ski and snow than does the ski-camber profile.

Preprint ARTICLE | doi:10.20944/preprints202306.0780.v1

A Lightweight Detection Algorithm for Unmanned Surface Vehicles Based on Multi-Scale Feature Fusion

Lei Zhang, Xiang DU, Renran Zhang, Jian Zhang

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: unmanned surface vehicle; multi-scale feature; lightweight detection algorithm; dynamic head; coordinate convolution; YOLOv7-tiny

Online: 12 June 2023 (07:09:57 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202306.0536.v1

Wave Behavior Characteristics of Elastically Supported Fluid-Conveying Carbon Nanotubes under the Influence of Magnetic Fields

Qian Deng, Ming Li, Liufei Lv

Subject: Physical Sciences, Other Keywords: Fluid conveying carbon nanotubes; Timoshenko beams; Small-scale effects; Magnetic flux; Non-local strain gradients

Online: 7 June 2023 (10:39:43 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.0094.v1

Sustainable Metabolic Engineering Design Development Employing a Complex Objective Function

Reinis Muiznieks, Elina Dace, Egils Stalidzans

Subject: Biology And Life Sciences, Biology And Biotechnology Keywords: economic sustainability; environmental sustainability; social sustainability; genome scale metabolic model; metabolic engineering; growth coupled production

Online: 3 May 2023 (04:32:50 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202206.0249.v1

Validation of the Cooling Model for TMCP Processing of Steel Sheets with Oxide Scale by Industrial Experiment Data

Emmanuil Beygelzimer, Yan Beygelzimer

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: rolled flat products; accelerated cooling; temperature; mathematical model; oxide scale; Ther-mo-Mechanical Controlled Process

Online: 17 June 2022 (05:14:37 CEST)

Show abstract| Download PDF| Share

Working Paper REVIEW

Machine Learning of Spatial Data

Behnam Nikparvar, Jean-Claude Thill

Subject: Social Sciences, Geography, Planning And Development Keywords: spatial machine learning; spatial dependence; spatial heterogeneity; scale; spatial observation matrix; learning algorithm; deep learning

Online: 6 August 2021 (14:18:55 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202106.0569.v1

Effects of Clinical Characteristics on Sleep Quality in Patients with Chronic Temporomandibular Disorders

Yeon-Hee Lee, Q-Schick Auh, Jung-Sub An, Tae Kim

Subject: Medicine And Pharmacology, Dentistry And Oral Surgery Keywords: Sleep quality; Chronic pain; Temporomandibular disorder; Pittsburgh Sleep Quality Index; STOP-Bang; Epworth Sleepiness Scale

Online: 23 June 2021 (11:11:14 CEST)

Show abstract| Download PDF| Share

Objectives: This study aimed to investigate and compare sleep quality between patients with chronic temporomandibular disorder and healthy controls, and to analyze the association of sleep quality with disease characteristics, obstructive sleep apnea risk factors, and excessive daytime sleepiness. Methods: Chronic temporomandibular disorder patients (n=503) and 180 age- and sex-matched healthy controls were included, who completed well-organized clinical report and answered questions on sleep quality (Pittsburgh Sleep Quality Index), sleep apnea risk factors (STOP-Bang questionnaire), and excessive daytime sleepiness (Epworth sleepiness scale). Results: Mean global Pittsburgh Sleep Quality Index scores were significantly higher in the patients (6.25±2.77) than in healthy controls (6.25±2.77) (p<0.001). Poor sleep was significantly more prevalent in the patient group (56.9%) than in healthy controls (22.2%) (p<0.001). Compared with healthy controls, chronic temporomandibular disorder patients had a higher likelihood of obstructive sleep apnea. (STOP-Bang total score ≥3; 7.2% vs. 16.1%; p<0.01) and higher excessive daytime sleepiness (Epworth sleepiness scale score ≥10; 12.8% vs. 19.7%; p<0.05). Age (odds ratio=2.551; p<0.001), female sex (odds ratio=1.885; p=0.007), total Epworth sleepiness scale score (odds ratio=1.839; p=0.014), and headache attributed to temporomandibular disorder (odds ratio=1.519; p=0.049) were the most powerful predictors of poor sleep (global Pittsburgh Sleep Quality Index score ≥5) in chronic temporomandibular disorder patients. Conclusion: Chronic temporomandibular disorder patients had sleep quality impairment. Various factors, including peripheral and central factors, affect the patient's sleep quality. Therefore, in addition to sleep quality and sleep-related problems, the underlying central mechanism for poor sleep quality should be assessed when treating chronic temporomandibular disorder patients.

Preprint ARTICLE | doi:10.20944/preprints202105.0282.v2

Design Optimization of Centrifugal Microfluidic "Lab-on-a-Disc" Systems towards Fluidic Larger-Scale Integration

Jens Ducrée

Subject: Computer Science And Mathematics, Software Keywords: centrifugal microfluidics, Lab-on-a-Disc, large-scale integration, reliability, tolerances, band width, packing density

Online: 8 June 2021 (12:07:35 CEST)

Show abstract| Download PDF| Share

Working Paper ARTICLE

Single Image Rain Removal Based on Multi-Scale and Channel Attention Mechanism

Qiuling Liu, Gang Zhou, Zhenhong Jia

Subject: Computer Science And Mathematics, Computer Science Keywords: Single image deraining; Multi-layer Laplacian pyramid; Multi-scale feature extraction module; Channel attention module.

Online: 31 May 2021 (11:41:25 CEST)

Show abstract| Download PDF| Share

Working Paper ARTICLE

A New 3D Geological Modeling Method Based On Remote Sensing and Its Application in Ya 'an Area Sichuan Province

Zhaoyang Ma, Lihai Zhang, Yan Wang, Guifan Zhu, Yinping Liang

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: Multi-source heterogeneity; remote sensing; large-scale high-precision modeling; grid division; geostatistics; spatial interpolation

Online: 20 January 2021 (16:19:34 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202012.0409.v1

Personalized Biometrics of Physical Pain Agree with Its Psychological Perception by Participants with Sensory Over Responsivity

Jihye Ryu, Tami Bar-Shalita, Yelena Granovsky, Irit Weissman-Fogel, Elizabeth B. Torres

Subject: Medicine And Pharmacology, Immunology And Allergy Keywords: EEG; pain biometrics; stochastic analyses; micro-movements spikes; sensory over responsivity; standardized scale; personalized pain

Online: 16 December 2020 (13:19:42 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202010.0298.v2

Cosmic Ray Extremely Distributed Observatory

Piotr Homola, Dmitriy Beznosko, Gopal Bhatta, Łukasz Bibrzycki, Łukasz Bratek, Michalina Borczyńska, Nikolay M. Budnev, Dariusz Burakowski, David Edwin Alvarez-Castillo, Kevin Almeida Cheminant, Aleksander Ćwikła, Punsiri Dam-o, Niraj Dhital, Alan Duffy, Piotr Głownia, Krzysztof Gorzkiewicz, Dariusz Góra, Alok C. Gupta, Zuzana Hlávková, Martin Homola, Joanna Jałocha, Robert Kamiński, Michał Karbowiak, Marcin Kasztelan, Renata Kierepko, Marek Knap, Péter Kovács, Szymon Kuliński, Bartosz Łozowski, Marek Magryś, Mikhail V. Medvedev, Justyna Mędrala, Jerzy W. Mietelski, Justyna Miszczyk, Alona Mozgova, Antonio Napolitano, Vahab Nazari, Y. Jack Ng, Michał Niedźwiecki, Cristina Oancea, Bogusław Ogan, Gabriela Opiła, Krzysztof Oziomek, Maciej Pawlik, Marcin Piekarczyk, Bożena Poncyljusz, Jerzy Pryga, Matías Rosas, Krzysztof Rzecki, Jilberto Zamora-Saa, Katarzyna Smelcerz, Karel Smolek, Weronika Stanek, Jarosław Stasielak, Slawomir Stuglik, Jolanta Sulma, Oleksandr Sushchov, Manana Svanidze, Kyle Tam, Arman Tursunov, José-M. Vaquero, Tadeusz Wibig, Krzysztof W. Woźniak

Subject: Physical Sciences, Nuclear And High Energy Physics Keywords: cosmic rays; cosmic ray ensembles; extensive air showers; large scale cosmic ray correlations; CREDO Collaboration

Online: 15 October 2020 (16:13:43 CEST)

Show abstract| Download PDF| Share

Preprint SHORT NOTE | doi:10.20944/preprints202005.0287.v1

The Impacts of COVID-19 to Small Scale Fisheries in Tun Mustapha Park, Sabah, Malaysia; What Do We Know So Far?

Joannie Jomitol, Adam J. Payne, Sarmalin Sakirun, Mohd. Omar Bural

Subject: Biology And Life Sciences, Aquatic Science Keywords: COVID-19; small scale fisheries; artisarnal fishers; coastal communities; marine protected area; Malaysia; fisheries; impacts

Online: 17 May 2020 (08:46:10 CEST)

Show abstract| Download PDF| Share

Working Paper ARTICLE

Effect of Interlayer Cooling Time, Constraint and Tool Path Strategy on Deformation of Large Components made by Laser Metal Deposition with Wire

Yousub Lee, Yashwanth Bandari, Peeyush Nandwana, Brian Gibson, Brad Richardson, Srdjan Simunovic

Subject: Engineering, Mechanical Engineering Keywords: large-scale additive manufacturing; interlayer cooling time; tool path optimization; part deformation; Ti-6Al-4V

Online: 10 November 2019 (09:04:24 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201803.0010.v1

The Effect of Propeller Scaling Methodology on the Performance Prediction

Stephan Helma, Heinrich Streckwall, Jan Richter

Subject: Engineering, Marine Engineering Keywords: propeller scale effects; propeller open-water efficiency; surface roughness; equivalent profile; strip method; betai method

Online: 1 March 2018 (15:58:14 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202410.1895.v1

As One and Many: Relating Individual and Emergent Group-Level Generative Models in Active Inference

Peter Thestrup Waade, Christoffer Lundbak Olesen, Jonathan Ehrenreich Laursen, Samuel William Nehrer, Conor Heins, Karl Friston, Christoph Mathys

Subject: Biology And Life Sciences, Behavioral Sciences Keywords: Active Inference; Free Energy Principle; Markov Blanket; Predictive Processing; Cognitive Modelling; Multi-scale; Collective Intelligence; Emergence

Online: 24 October 2024 (10:15:45 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint REVIEW | doi:10.20944/preprints202410.1240.v1

The Untapped Potential of Hairy Root Cultures and Their Multiple Applications

Iman Mirmazloum, Aleksandar K. Slavov, Andrey S. Marchev

Subject: Biology And Life Sciences, Plant Sciences Keywords: Specialized metabolites; hairy roots; Rhizobium rhizogenes; elicitation; metabolic engineering, CRISPR/CAS9; bioprocessing; bioreactors; patents; industrial scale

Online: 16 October 2024 (09:40:53 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202409.0777.v1

Delineating Ecological Functional Zones and Grades for Multi-Scale Ecosystem Management

Yan Zhang, Shuhan Liu, Peiheng Yu, Yanchi Lu, Yang Zhang, Jinting Zhang, Yiyun Chen

Subject: Environmental And Earth Sciences, Ecology Keywords: ecosystem services; ecological functional zones; tradeoffs and synergies; self-organizing feature mapping; multi-scale management ;

Online: 10 September 2024 (09:42:13 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.1537.v1

Converting Candlenut Shell Waste into Graphene for Electrode Applications

Rikson Siburian, Kerista Tarigan, Yosia Gopas Oetama Manik, Fajar Hutagalung, Yatimah Alias, Yong Ching Chan, Boon Peng Chang, Jonathan Siow, Amanda Jiamin Ong, Jingfeng Huang, Suriati Paiman, Boon Tong Goh, Lisnawaty Simatupang, Ronn Goei, Alfred Iing Yoong Tok, Yahya Mohd Fakharul Zaman Raja, Fathan Bahfie

Subject: Engineering, Other Keywords: graphene; candlenut (Aleurites moluccanus) shell; Ce/graphene; carbon large scale production; energy storage electrodes

Online: 24 June 2024 (04:28:23 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1714.v1

Large-Scale Group Decision-Making Method with Public Participation and Its Application in Urban Management

Xiuhong Niu, Yongming Song, Zhongwen Xu

Subject: Business, Economics And Management, Business And Management Keywords: Large-scale group decision-making; Public participation; Multi-granular probabilistic linguistic preference relations; Consensus reaching process

Online: 27 May 2024 (13:07:30 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1203.v1

Computational Thinking Measurement of CS University Students

Raquel Hijón-Neira, Celeste Pizarro, John French, Daniel Palacios-Alonso, Emre Çoban

Subject: Computer Science And Mathematics, Computer Science Keywords: Computational Thinking; Programming; Performance-based assessment platform; Interactive web app; Evaluation methods; Psychometric scale; Students evaluation

Online: 20 May 2024 (10:11:12 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.1531.v1

An Evaluation of the Primary Causative Factors Affecting Durability of Flow Diversion Simple Weirs in Muchinga Province in Zambia

Alex Lushikanda KABWE, Masahiro HYODO, Hidehiko OGATA, Yoshihiro Sagawa, Yoshinao ADACHI, Masayuki ISHII

Subject: Engineering, Other Keywords: farmer-led small-scale irrigation; operation and maintenance; catchment characteristics; durability assessment; local material; farmer perception

Online: 23 April 2024 (17:59:45 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202402.1419.v1

Gaining Insight Into Teenagers' Experiences of Pain After Laparoscopic Surgeries; A Prospective Study

Mihaela Visoiu, Jacques E. Chelly, Senthilkumar Sadhasivam

Subject: Medicine And Pharmacology, Anesthesiology And Pain Medicine Keywords: Teenager Postoperative Pain; Visual Analog Pain Scale; Pain Behaviour; Pain Catastrophizing Thoughts; Anxiety; Mood; Laparoscopic Surgeries

Online: 26 February 2024 (11:41:46 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202402.0371.v1

Is Entropy a Force of Nature?

Martin Johnson

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: dark energy
cosmic background radiation
dark ages
large-scale structure of the Universe

Online: 7 February 2024 (03:37:23 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202401.0773.v1

Validation of HPV Knowledge Tool and Assessment of HPV Knowledge and Awareness among Students and Staff at IBB University, Niger State, Nigeria: Implications for Health Education and Prevention

Melvin Omone Ogbolu, Miklós Kozlovszky

Subject: Public Health And Healthcare, Public Health And Health Services Keywords: Cervical cancer; HPV knowledge; Awareness of HPV infection; Awareness of HPV vaccine; Scale validation; Quantile regression

Online: 10 January 2024 (10:01:35 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202401.0137.v1

Observational Constraints and Future of the Universe with Dynamic Dark Energy

Florian Neukart

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Hubble tension; Cosmic Microwave Background; Large-scale structures; Dark energy constraints; Future cosmological observations

Online: 3 January 2024 (04:20:40 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202311.1856.v1

Effects of Anthropogenic Activities on Sardinella maderensis (Lowe, 1838) Fisheries in Coastal Communities of Ibeju-Lekki, Lagos, Nigeria

Temitope Adewale, Denis Aheto, Isaac Okyere, Olufemi Soyinka, Samuel Dekolo

Subject: Environmental And Earth Sciences, Environmental Science Keywords: Small-scale fisheries; anthropogenic threats; Sardinella maderensis; land use change; Nigeria; remote sensing; pollution

Online: 29 November 2023 (06:32:38 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202310.0416.v2

Implementation of Simulation Modeling of Single and High‐Volume Machine‐Building Productions

Tatyana Nikonova, Nadezhda Savelyeva, Gulnara Zhetessova, Vassiliy Yurchenko, Olegas Černašėjus, Olga Zharkevich, Essim Dandybaev, Andrey Berg, Sergey Vassenkin, Murat Baimuldin

Subject: Engineering, Mechanical Engineering Keywords: technological preparation of production; automation of production processes; small-scale production; single production; machine-building enterprises

Online: 28 November 2023 (17:01:21 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202311.0401.v1

Influence of Comorbidities on Chronic Obstructive Pulmonary Disease (COPD) Outcomes: Risk Prediction of Acute Exacerbations Using the Cumulative Illness Rating Scale (Cirs)

Domenico Di Raimondo, Edoardo Pirera, Chiara Pintus, Riccardo De Rosa, Martina Profita, Gaia Musiari, Gherardo Siscaro, Antonino Tuttolomondo

Subject: Biology And Life Sciences, Aging Keywords: Comorbidity; Multimorbidity; Chronic Obstructive Pulmonary Disease; COPD; Cumulative Illness Rating Scale; acute exacerbation of COPD (AECOPD)

Online: 7 November 2023 (10:33:41 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202302.0299.v1

Using Ensemble Convolutional Neural Network to Detect Deepfakes Using Periocular Data

David Johnson, Xiaohonh Yuan, Kaushik Roy

Subject: Computer Science And Mathematics, Computer Science Keywords: deepfake detection; CNN; deep neural network; computer vision; scale invariant feature transform; histogram of oriented gradients

Online: 17 February 2023 (06:51:37 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202211.0095.v1

Solar System-Like Systems with Special Reference to Relativistic Quantum Mechanics and Weak Gravitational Field

Peter Gara

Subject: Physical Sciences, Quantum Science And Technology Keywords: Solar system-like systems; Relativistic Quantum Mechanics; Weak Gravity; Proper Time Scale of the Solar System

Online: 4 November 2022 (13:42:21 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202202.0277.v2

Research on Mechanical Braking Model of Cows Knee Joint

Meng Liu, Kexin Meng, Shuli Mei, Ruyi Xing

Subject: Physical Sciences, Mathematical Physics Keywords: Dairy cow; Lyapunov exponent; bio-mechanical model; Nonlinear dynamics; gait; Weight scale; Three-link model; Fractals

Online: 24 February 2022 (09:57:02 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202108.0389.v1

Task-Adaptive Embedding Learning with Dynamic Kernel Fusion for Few-Shot Remote Sensing Scene Classification

Pei Zhang, Guoliang Fan, Chanyue Wu, Dong Wang, Ying Li

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: remote-sensing classification; scene classification; few-shot learning; meta-learning; vision transformers; multi-scale feature fusion

Online: 18 August 2021 (14:29:29 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202004.0235.v1

Sensitivity of Stomate Size in Red Maple (Acer rubrum L.) Trees in Deciduous Forests to Urban Conditions

Covel R. McDermot, Vince D'Amico, Tara Trammell

Subject: Environmental And Earth Sciences, Environmental Science Keywords: abiotic stress; metro-scale; physiological acclimation; urban leaf morphology; red maple trees; stomate size; urban forests

Online: 15 April 2020 (09:32:30 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201903.0117.v1

An Accelerating and Rotating Planck-Hubble Universe (A Very Simple Model of Quantum Cosmology)

U. V. S. Seshavatharam, S. Lakshminarayana

Subject: Physical Sciences, Nuclear And High Energy Physics Keywords: planck scale; quantum cosmology; critical density; ordinary matter; dark matter; expansion velocity; angular velocity; Hubble’s law;

Online: 11 March 2019 (08:01:28 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201901.0236.v1

Hybrid 3D Models: When Geomatics Innovations Meet Extensive Built Heritage Complexes

Filiberto Chiabrando, Giulia Sammartano, Antonia Spanò, Alessandra Spreafico

Subject: Environmental And Earth Sciences, Remote Sensing Keywords: 3D models; multi-sensor; multi-scale; SLAM; MMS; LiDAR; UAV; data integration; data fusion; cultural heritage

Online: 23 January 2019 (10:08:42 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints201810.0329.v1

Modeling of Protein Structural Flexibility and Large-Scale Dynamics: Coarse-grained Simulations and Elastic Network Models

Sebastian Kmiecik, Maksim Kouza, Aleksandra Elzbieta Badaczewska-Dawid, Andrzej Kloczkowski, Andrzej Kolinski

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: protein dynamics; coarse-grained simulation; Monte-Carlo dynamics; structural flexibility; large-scale dynamics; elastic network model;

Online: 15 October 2018 (17:10:57 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201806.0175.v1

Antineutrino Star Model of the Big Bang and Dark Energy

Tom F. Neiser

Subject: Physical Sciences, Particle And Field Physics Keywords: cosmology: theory; gravitation; early universe; dark energy; large-scale structure of universe; cosmic background radiation; neutrinos

Online: 12 June 2018 (08:43:45 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201805.0258.v2

Revisiting the Derivation of Heisenberg's Uncertainty Principle: The Collapse of Uncertainty at the Planck Scale

Espen Haug

Subject: Physical Sciences, Thermodynamics Keywords: Heisenberg's uncertainty principle; certainty; wave function; Planck scale; Planck mass; Planck particle; Bell's Inequality; superposition; entropy; Compton clock

Online: 5 September 2018 (09:34:51 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201705.0046.v1

Small Scale Hydroelectric Power Plants in Norway. Some Microeconomic and Environmental Considerations

Johannes Idsø

Subject: Business, Economics And Management, Economics Keywords: small scale hydroelectric power; neumann-mortenstern utility theory; environmental effects of hydro power; hydropower and risk

Online: 5 May 2017 (05:32:02 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202306.1645.v1

Investigation of Heat Transfer and Pressure Drop for R744 in a Horizontal Smooth Tube of R744/R404A Hybrid Cascade Refrigeration System—Part 2: Low-Temperature Region

Min-Ju Jeon

Subject: Engineering, Mechanical Engineering Keywords: smooth horizontal tube; evaporation heat transfer; evaporative heat transfer; flow boiling; heat transfer; heat transfer coefficient; pressure drop; low temperature; dry-out; flow pattern map; flow regimes; R744

Online: 23 June 2023 (08:30:40 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202307.1051.v9

Energy Renormalization in a Berry Geometrical Phase: Low-Energy Perturbations of the Strong Interaction and the QCD Mass Gap

Mark Gibbons

Subject: Physical Sciences, Particle And Field Physics Keywords: Berry geometrical phase; dual superconductivity; scale- and gauge-invariance; hyperbolic curvature; strong gravity; renormalization; QCD mass gap

Online: 18 April 2024 (14:04:58 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202409.0464.v1

Efficient Large-Scale Urban Parking Prediction: Graph Coarsening Based on Real-Time Parking Service Capability

Yixuan Wang, Zhenwu Chen, Kangshuai Zhang, Yunduan Cui, Lei Peng

Subject: Engineering, Transportation Science And Technology Keywords: Large-scale urban parking prediction; Real-time parking service capacity; Graph coarsening; Temporal convolutional autoencoder; Graph attention

Online: 5 September 2024 (12:07:32 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202407.0717.v1

A Novel Five-Surface Phosphor-in-Glass for High Illumination and Excellent Color Uniformity in Larger Scale LEDs

Hong-Wei Huang, Chien-Wei Huang, Yi-Chian Chen, Hsing-Kun Shih, Wei-Chih Cheng, Chun-Nien Liu, Chia-Chin Chiang

Subject: Engineering, Electrical And Electronic Engineering Keywords: Five-surface phosphor layer; phosphor-in-glass; laser engraving process; chip scale package; white light-emitting diode.

Online: 9 July 2024 (08:42:12 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202406.0694.v1

Spatial Distribution Characteristics of Urban Air Quality and the Spatial Heterogeneity of Driving Factors: A Case Study of Beijing

Zhixiong Tan, Haili Wu, Qingyang Chen, Jiejun Huang

Subject: Environmental And Earth Sciences, Pollution Keywords: air quality index; multi-scale geographically weighted regression; multi-source geographic data; spatial autocorrelation analysis; spatial heterogeneity

Online: 11 June 2024 (09:39:27 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1657.v1

Upscaling and Risk Evaluation of the Synthesis of the 3-5-Diamino-1H-Pyrazole, Disperazol

Charlotte Uldahl Jansen, Katja Egeskov Grier, Jens Bo Andersen, Louise Dahl Hultqvist, Martin Nilsson, Claus Moser, Michael Graz, Tim Tolker-Nielsen, Michael Givskov, Katrine Qvortrup

Subject: Chemistry And Materials Science, Organic Chemistry Keywords: biofilm; dispersal; pyrazole; c-di-GMP; large scale synthesis; flow chemistry; safety; dust analysis; Pseudomonas aeruginosa; preclinical

Online: 27 May 2024 (09:46:34 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.0241.v1

Indirect Model Predictive Control on Epidemiological Stochastic Blockmodels

Jonas Hjulstad, Morten Hovd

Subject: Engineering, Control And Systems Engineering Keywords: identification for control; optimization and control of large-scale network systems; Monte Carlo methods; high performance computing

Online: 6 May 2024 (07:49:54 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.1842.v1

A Novel Five-Surface Phosphor-in-Ceramic for High Illumination and Excellent Color Uniformity in Larger Scale LEDs

Hong-Wei Huang, Chien-Wei Huang, Yi-Chian Chen, Hsing-Kun Shih, Wei-Chih Cheng, Chun-Nien Liu, Chia-Chin Chiang, Wood-Hi Cheng

Subject: Engineering, Electrical And Electronic Engineering Keywords: five-surface phosphor layer; phosphor-in-ceramic; laser engraving process; chip scale package; white light-emitting diode

Online: 28 April 2024 (10:17:01 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202404.1385.v1

Land Management Scale and Carbon Balance Ratio: Spatial Spillover Effects and Threshold Characteristics

Wenjin Wu, Yaping Chen, Yule Gu, Anqi Guo, Hao Wang, Jun Guan

Subject: Business, Economics And Management, Economics Keywords: land management scale; net carbon effect; carbon balance ratio; net carbon sink; spatial spillover effect; threshold characteristics

Online: 22 April 2024 (10:16:36 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202403.1812.v1

Scale Invariant Parity Doublet Model: Interplay between the Vector Mesons and the Dilatons /Parity Doubling in Dense Baryonic Matter as an Emergent Symmetry and Pseudo-Conformal Model

Hyun Kyu Lee

Subject: Physical Sciences, Nuclear And High Energy Physics Keywords: scale invariance; parity doubling; pseudo-conformal phase; vector meson-dilaton interplay; compact star matter; speed of sound

Online: 29 March 2024 (09:57:46 CET)

Show abstract| Download PDF| Share

The star matter composed of nucleons deep inside the compact star like a neutron star is believed to be very dense and various new types of concepts and physical phenomena due to the nontrivial strong correlations are naturally expected. Peudo-conformality in dense star matter has been discussed recently assuming the hidden underlying scale symmetry, which is partly supported by the recent discussions of infrared conformal window of QCD. It is found that the appearance of dilaton and the dilatonic mean field calculation of nucleonic matter lead to the density independent nucleon mass at higher density regime than normal nuclear matter density. Non-vanishing constant nucleon mass can be considered as a chiral invariant mass of the parity doublet model, in which the chiral symmetry is manifested even in the massive nucleon sector provided with a parity doubling. In this paper we will discuss how the chiral and scale symmetry are correlated to lead the parity doublet symmetry inside the core of the compact star. A simple schematic model is adopted. The star matter at T=0 is basically composed of the nucleons. As a first approximation, they can be treated as free fermions with the effective mass filled up to fermi surface. There is a nontrivial feature due to the interplay between vector meson and nucleon(or equivalently dilaton, χ). The trace of energy momentum tensor approaches density independent, the pseudo-conformal phase. Local fluctuations inside the star matter will be travelling with the speed of sound which depends on the equation of state. In the pseudo-conformal phase, the speed of sound approaches to the conformal velocity for the scale symmetric matter, vc=13c. The excitations of the parity doublets in the compact star matter as an emerging phenomena in pseudo-conformal phase will be discussed in connection to the chiral symmetry. The possible implication on the corespondence of hadrons to quark degrees of freedom will be briefly discussed.

Preprint REVIEW | doi:10.20944/preprints202401.0789.v1

Microbiome Modeling: A Beginner’s Guide

Emanuel Lange, Lena Kranert, Jacob Krüger, Dirk Benndorf, Robert Heyer

Subject: Biology And Life Sciences, Biology And Biotechnology Keywords: systems microbiology; microbial ecology; omics data integration; metaproteomics; genome-scale modeling; constraint-based modeling; boolean modeling, bioinformatics

Online: 10 January 2024 (09:57:55 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202401.0642.v1

PointBLIP: Zero-Training Point Cloud Classification Network Based on BLIP-2 Model

Yunzhe Xiao, Yong Dou, Shaowu Yang

Subject: Computer Science And Mathematics, Computer Vision And Graphics Keywords: point cloud classification; zero-training; large-scale vision-and-language model; zero-shot classification; few-shot classification

Online: 8 January 2024 (17:03:40 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202312.2201.v1

Radargrammetric 3D Imaging through Composite Registration Method Using Multi-Aspect SAR Imagery

Yangao Luo, Yunkai Deng, Wei Xiang, Heng Zhang, Congrui Yang, Longxiang Wang

Subject: Engineering, Electrical And Electronic Engineering Keywords: radargrammetry; synthetic aperture radar (SAR); multi-aspect SAR imagery; SAR image registration; scale invariant feature transform (SIFT)

Online: 28 December 2023 (14:55:26 CET)

Show abstract| Download PDF| Share

Interferometric synthetic aperture radar (InSAR) and tomographic SAR measurement techniques are commonly used for the three-dimensional (3D) reconstruction of complex areas, while the effectiveness of these methods relies on the interferometric coherence among SAR images with minimal angular disparities. Radargrammetry exploits stereo image matching to determine the spatial coordinates of corresponding points in two SAR images, and acquire their 3D properties. The performance of the image matching process directly impacts the quality of the resulting digital surface model (DSM). However, the presence of speckle noise, along with dissimilar geometric and radiometric distortions, poses considerable challenges to achieve accurate stereo SAR image matching. To address the aforementioned challenges, this paper proposes a radargrammetric method based on composite registration of multi-aspect SAR images. The proposed method combines coarse registration using scale invariant feature transform (SIFT) with precise registration using normalized cross-correlation (NCC) to achieve accurate registration between multi-aspect SAR images with large disparities. Furthermore, the multi-aspect 3D point clouds are merged by the proposed radargrammetric 3D imaging method, resulting in 3D imaging of target scenes based on multi-aspect SAR images. For validation purpose, this paper presents a comprehensive 3D reconstruction of the Five-hundred-meter Aperture Spherical radio Telescope (FAST) by using Ka-band airborne SAR images. It does not necessitate prior knowledge of the target and is applicable to the detailed 3D imaging of large-scale areas with complex structures. In comparison to other SAR 3D imaging techniques, it reduces the requirements for orbit control and radar system parameters. To sum up, the proposed 3D imaging method with composite registration guarantees imaging efficiency while enhances the imaging accuracy of crucial areas with limited data.

Preprint ARTICLE | doi:10.20944/preprints202312.0443.v1

Ranking of Independent Small Scale Electricity Generation

Janis Kramens, Megija Valtere, Guntars Krigers, Vladimirs Kirsanovs, Dagnija Blumberga

Subject: Engineering, Energy And Fuel Technology Keywords: Fuel cell; Multi-Criteria Decision Analysis (MCDA); Renewable energy systems; Sensitivity analysis; Small scale systems; Stirling engine

Online: 7 December 2023 (09:08:12 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202310.0063.v1

Diagnostic Assessment in Wet and Dry Seasons of Simple Weirs Constructed by Small-scale Farmers in the Northern Region Provinces of Zambia

Alex Lushikanda KABWE, Masahiro HYODO, Hidehiro OGATA, Yoshihiro SAGAWA, Yoshinao ADACHI, Masayuki ISHII

Subject: Engineering, Other Keywords: ingle-line weir; small-scale irrigation; river diversion; rural areas; up-stream wa-ter level; emerging farmers

Online: 2 October 2023 (09:52:52 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202307.1971.v1

Small-scale marine fishers’ possession of fishing vessel and its impact to their net income level: A Case Study in Takalar District, South Sulawesi Province of Indonesia

Ahmad Imam Muslim, Miho Fujimura, Tsuji Kazunari, Muslim Salam

Subject: Business, Economics And Management, Economics Keywords: Small-scale fisher, Fishers’ boat, Net income level of fishers, Row boat, Outboard motor boat, Motor boat

Online: 28 July 2023 (11:44:35 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202302.0412.v1

An Adaptive Layered Clustering Framework with Improved Genetic Algorithm for Solving Large-Scale Traveling Salesman Problems

Hai-yang Xu, Heng-You Lan

Subject: Computer Science And Mathematics, Information Systems Keywords: Computational complexity analysis; High parallelizability; Improved genetic algorithm; Adaptive layered clustering framework; Large-scale traveling salesman problem

Online: 24 February 2023 (01:20:06 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202209.0017.v1

Application of Reichardt’s Solvent Polarity Scale [E_T(30)] in the Selection of Bonding Agents for Composite Solid Rocket Propellants

Franco Cataldo

Subject: Chemistry And Materials Science, Applied Chemistry Keywords: Bonding agents (BA); composite solid rocket propellants (CSRP); Reichardt’s ET(30) polarity scale; mechanical properties of CSRP.

Online: 1 September 2022 (09:25:21 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202105.0141.v2

Effectiveness of Health Education Given To Prevent Back Pain In Women: Pre- And Post-Test Study

Elizabeth Olubunmi Babalola

Subject: Medicine And Pharmacology, Orthopedics And Sports Medicine Keywords: low back pain; women; exercise; physical activity; health education; Oswestry Disability Index; Back Pain Functional Scale; ergonomics

Online: 10 May 2021 (14:07:50 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202104.0292.v1

HIV Propagation in a Population Group Considering Infection in the Immune System Of Each Infected Individual

Sol de Amor Vásquez-Quintero, Hernán Darío Toro-Zapata, Dennis Alexánder Prieto-Medellín

Subject: Computer Science And Mathematics, Algebra And Number Theory Keywords: Multi-scale model; system of differential equations; HIV propagation; complex network; basic reproduction number; antiretroviral therapy; prevalence.

Online: 12 April 2021 (12:35:52 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202005.0400.v1

What is the Real Shape of the Hubble Diagram, z = H₀*D or z+1= e^H0*t? Analysis of the SN1a Supernovae and Gamma Ray Burst Redshift/Magnitude Data including the High Redshift Range up to z = 8.1

Laszlo Marosi

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies; distances and redshift; high redshift; stars; Gamma ray bursts; individual; supernovae; individual; cosmology; distance scale; observations

Online: 24 May 2020 (19:07:56 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201806.0272.v1

Assessing Cognitive and Social Attitudes Toward Environmental Conservation in Coral Reef Social-Ecological Systems

Kostas Alexandridis

Subject: Social Sciences, Cognitive Science Keywords: environmental attitudes; social-ecological systems; coral reef; scale development; item-response theory; reliability; generalized structural equation model

Online: 18 June 2018 (15:26:36 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201805.0111.v1

Exposure to Environmental Tobacco Smoke and Effects on Physical and Mental Health of Slovak School Children

Ludmila Sevcikova, Jana Babjakova, Jana Jurkovicova, Martin Samohyl, Zuzana Stefanikova, Erika Machacova, Diana Vondrova, Etela Janekova, Katarina Hirosova, Alexandra Filova, Michael Weitzman, Lubica Argalasova

Subject: Public Health And Healthcare, Public, Environmental And Occupational Health Keywords: Environmental Tobacco Smoke (ETS); Slovak school children; mental health; physical health; Columbia Impairment Scale; Behavioral Problem Index

Online: 7 May 2018 (09:23:27 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints201710.0046.v1

Full-Scale/Model Test Comparisons to Validate the Traditional ABL Wind Tunnel Simulation Technique: A Literature Review

X.X. Cheng, J. Dong, Y. Peng, L. Zhao, Y.J. Ge

Subject: Engineering, Civil Engineering Keywords: comparative study; full-scale measurement; wind tunnel model test; multiple-fan actively controlled wind tunnel; research scheme

Online: 9 October 2017 (06:38:40 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201709.0098.v2

A Conversion Method to Determine Regional Vegetation Cover Factor from Standard Plots based on Large Sample Theory and TM Images: A Case Study in the Eastern Farming-pasture Ecotone of Northern China

Degen Lin, Yuan Gao, Yaoyao Wu, Peijun Shi, Huiming Yang, Jing’ai Wang

Subject: Environmental And Earth Sciences, Remote Sensing Keywords: farming-pasture ecotone; TM image; remote sensing; vegetation cover factor; scale conversion; land use; high resolution image

Online: 21 September 2017 (16:33:49 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202409.1075.v1

Robust and Accurate Recognition of Carriage Linear Array Images for Train Fault Detection

Zhenzhou Fu, Xiao Pan

Subject: Engineering, Transportation Science And Technology Keywords: High-resolution image recognition; point set registration; weighted radial basis function; non-linear scale distortion; gaussian mixture model

Online: 13 September 2024 (10:41:07 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Train fault detection primarily relies on the comparative analysis of collected images with standard reference images, making the accurate identification of the collected image types crucial for effective fault detection. Most current systems achieve indirect classification of carriage images by using Automatic Equipment Identification (AEI) devices to recognize carriage identification number information while capturing the carriage images. However, damaged RF tags or blurred characters can hinder these devices, obstructing further train fault analyses. The unique features of carriage linear array images, such as high resolution, extreme aspect ratios, and local non-linear distortions, pose significant challenges to recognition algorithms. This paper proposes a method specifically designed to recognize these types of images. First, we implement an object detection algorithm to locate the positions of key components in carriage linear array images. By leveraging the spatial layout mapping between these key components and the carriage type classification, we simplify the complex image recognition problem into a sparse point set alignment task. To ensure effective registration despite local distortions in the linear array images, we propose a weighted radial basis function. To address the issues of unknown matching relationships and quantity mismatches during point set alignment, the proposed objective function is designed to maximize the similarity between Gaussian mixtures of point sets, thereby determining the RBF weights. Extensive experiments have demonstrated that our algorithm achieves 100% recognition accuracy under local nonlinear scale distortions of less than 15%. The algorithm remains effective even in the presence of some false positives or missed detections in key component object detection results. It can accurately identify the target category from 79 image categories within 24 milliseconds on an i7 CPU without GPU support. It is of great significance to reduce system cost and promote automatic exterior fault detection for train rolling stock.

Preprint ARTICLE | doi:10.20944/preprints202409.1055.v1

Research on Bearing Fault Diagnosis Methods Based on Various Convolutional Neural Network Architectures

Mingshen Xu

Subject: Engineering, Electrical And Electronic Engineering Keywords: bearing fault diagnosis; ; convolutional neural network; ; feature extraction; ; multi-directional convolution; ; multi-scale convolution

Online: 13 September 2024 (07:11:03 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202402.1129.v1

Impacts of a Moderate-Sized Earthquake: The 2023 Magnitude (Mw) 4.7 Leyte, Leyte Earthquake, Philippines

Jeffrey S. Perez, Deo Carlo E. Llamas, Daniel Jose L. Buhay, Ryan Christian Constantino, Crystel Jade M. Legaspi, Kristine Dionne B. Lagunsad, Rhommel N. Grutas, Marc Marion Y. Quimson

Subject: Environmental And Earth Sciences, Space And Planetary Science Keywords: Philippine fault – Leyte segment; PHIVOLCS Earthquake Intensity Scale (PEIS); surface rupture; liquefaction, landslide, site amplification; disaster risk reduction

Online: 21 February 2024 (03:49:00 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202402.1057.v1

Application of Cage Clamps in Rebar Cages to Enhance Stability and Safety: Experimental and Analytical Investigations

Masood Vahedi, Hamed Ebrahimian, Ahmad Itani

Subject: Engineering, Civil Engineering Keywords: Rebar cage; Full-scale testing; Cage Clamp connector; Mechanical Connector; Finite Element Modeling; Nonlinear analysis; Digital image correlation

Online: 20 February 2024 (06:00:11 CET)

Show abstract| Download PDF| Share

Rebar cages form the skeletal framework of reinforced concrete structural members. They comprise longitudinal and transverse reinforcing bars, usually connected by tie wires. Past studies have identified tie-wire connections as the "weak links" in large, prefabricated rebar cages, leading to their failure during site handling and construction stages. Recent research has explored the use of mechanical U-bolt connectors to bolster stability and safety of rebar cages while reducing their vulnerability and risk of failure. This paper presents a comprehensive experimental and numerical investigation of a new type of mechanical connector, referred to as "Cage Clamp", to enhance rebar cage stability and safety. Component-level experimental tests are conducted to determine the force-displacement response of Cage Clamp connectors for crossbar connections in different degrees of freedom. The results highlight the remarkable strength and stiffness of Cage Clamp connectors, significantly outperforming traditional tie-wire connections. Furthermore, full-scale experimental tests are performed on a circular underground pile-shaft rebar cage with Cage Clamp connectors to assess its behavior under various site handling conditions. The data obtained from these experiments are used to construct and refine detailed 3D finite element models of the rebar cages, capable of capturing the complex behavior of rebar cages with Cage Clamp connectors. Using the numerical model, a sensitivity analysis is performed to assess the effect of the number of Cage Clamps on the deflection and stability of the rebar cage. The findings show that using cage clamps to connect pick-up rebar with lateral reinforcement at every 8 to 10 feet is sufficient to ensure the stability of the cage during typical site handling conditions. The results of this study serve as a basis for establishing analysis, design, fabrication, and handling guidelines for rebar cages, contributing to safe and efficient construction practices.

Preprint REVIEW | doi:10.20944/preprints202312.1447.v1

Fracture Rate and Causes of Ceramic Crown Fracture: A Systematic Literature Review

Han Chao Chang, Grace S. Chiu, Ting-Hsun Lan

Subject: Medicine And Pharmacology, Dentistry And Oral Surgery Keywords: fracture; chipping; Newcastle–Ottawa Scale; endocrown; veneered fixed dental prosthesis; monolithic lithium disilicate (LS2); all-ceramic single crown

Online: 19 December 2023 (15:58:30 CET)

Show abstract| Download PDF| Share

To determine the fracture rate of ceramic crowns and causes of ceramic crown failure, this study used keywords—namely “endocrown,” “veneered fixed dental prosthesis,” “monolithic lithium disilicate (LS2),” and “all-ceramic single crown”—to search for articles published in English from 2005 to 2023 in the PubMed electronic database. Rather than using the Boolean logic algorithm between MESH terms and keywords, we accurately calculated the numbers of final clinically tracked cases with crown fractures from the contents of articles. The titles and abstracts of many related articles focused on implant or abutment fracture, while crown fracture was investigated and mentioned only in the main texts of the articles. Our studies included those crowns as well as having more complete data collection. Our search yielded 228, 93, 404, and 358 articles for the keywords “endocrown,” “veneered fixed dental prosthesis,” “monolithic lithium disilicate (LS2),” and “all-ceramic single crown,” respectively. We used the Newcastle–Ottawa Scale (NOS) to assess article quality, and our inclusion criteria were randomized controlled trials (RCT) and cohort study articles involving more than 3 years of follow-up and more than 20 cases. After reviewing, 16 high-quality articles were selected for analysis. The 4.4% crown fracture rate recommended on the basis of most clinical results was achieved in only 6 of the 16 articles. In these 6 articles, the researchers concluded the following reasons that may cause the crown fractures: the thickness of the veneer ceramic material; the connector dimensions; pontic span of the fixed prosthesis; the type of cement; the treatment of the ceramic surface before luting. Other articles inferred that the computer-aided design libraries that were insufficient for the creation of appropriate anatomically supported frameworks for prostheses with ceramic veneers; the thermal expansion coefficient and fracture toughness of the framework material did not match those of the veneer ceramic, resulting in an insufficient area supporting the ceramic veneer then leads to premature crown failure after a long period chewing. The future prospective for material developing could focus on solving those problems and have better clinical results.

Preprint ARTICLE | doi:10.20944/preprints202311.0146.v1

Full-scale Assessment of Seismic and Wind Load Performance in the Design of a Flexible Solar-Shading Double-Skin Façade

José Pérez-Fenoy, Carlos Rivera-Gómez, Jorge Roa-Fernández, Carmen Galán-Marín

Subject: Engineering, Architecture, Building And Construction Keywords: Double skin façade; Permeable cable-supported façade; Ceramic masonry façade; Full-scale wind and earthquake testing; Impact testing

Online: 2 November 2023 (10:33:32 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202305.0467.v1

Multi-Stream Graph-based Deep Neural Networks for Skeleton-based Sign Language Recognition

Abu Saleh Musa Miah, Md. Al Mehedi Hasan, Si-Woong Jang, Hyoun-Sup Lee, Jungpil Shin

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: Sign Language Recognition (SLR); Large Scale Dataset; American Sign Language; Turkey Sign Language; Chinese Sign Language; AUTSL; CSL

Online: 8 May 2023 (08:24:04 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202211.0367.v1

Self-Efficacy for Sustainable Gender Equality Practice in STEM Teacher Education in Spain and Greece

Cristina Miralles-Cardona, Ioanna Kitta

Subject: Social Sciences, Education Keywords: Sustainable gender equality; self-efficacy; gender mainstreaming; STEM higher education; STEM student teachers’ perceptions; scale validation, Spain, Creece

Online: 21 November 2022 (03:38:01 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202205.0155.v1

Rolling Bearing Fault Diagnosis based on Multiscale Permutation Entropy and SOA-SVM

Xi Zhang, Hongju Wang, Mingming Ren, Mengyun He, Lei Jin

Subject: Engineering, Mechanical Engineering Keywords: whale optimization algorithm; variational mode decomposition; seagull optimization algorithm; support vector machine; multi-scale permutation entropy; fault diagnosis

Online: 12 May 2022 (03:49:42 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202104.0353.v1

The Clampdown Effect: On The Expulsion of Super-Intelligence

Deep Bhattacharjee

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: WEAK Clampdown Effect, STRONG Clampdown Effect, KARDASHEV Scale, ERROR Processing, EXTRAVAGENT Curiosity, SOFT Singularity, HARD Singularity, ERROR Approximation

Online: 13 April 2021 (12:58:00 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202104.0099.v1

Enhancing Business Schools’ Pedagogy on Sustainable Business Practices and Ethical Decision-Making

Kathleen Rodenburg, Kelly MacDonald

Subject: Business, Economics And Management, Accounting And Taxation Keywords: New Ecological Paradigm; Ethical Orientation Scale; ethical decision making; Values driven leadership; eco consciousness; deontological; teleological; anthropocentrism; ecocentrism

Online: 5 April 2021 (11:24:06 CEST)

Show abstract| Download PDF| Share

Working Paper ARTICLE

Our Peculiar Motion Inferred from Number Counts of Mid Infra Red AGNs and the Discordance Seen with the Cosmological Principle

Ashok K. Singal

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: active galactic nuclei surveys; cosmic background radiation; large-scale structure of universe; solar system peculiar motion; cosmological principle

Online: 22 March 2021 (11:58:59 CET)

Show abstract| Download PDF| Share

According to the Cosmological Principle the Universe is isotropic and no preferred direction would be seen by an observer that might be stationary with respect to the expanding cosmic fluid. However, because of observer’s partaking in the solar system peculiar motion, there would appear in some of the observed properties of the Cosmos a dipole anisotropy, which could in turn be exploited to determine the peculiar motion of the solar system. The dipole anisotropy in the Cosmic Microwave Background Radiation (CMBR) has given a peculiar velocity vector 370 km s−1 along l=264∘,b=48∘. However, some other dipoles, for instance, from the number counts, sky brightness or redshift distributions in large samples of distant Active Galactic Nuclei (AGNs), have yielded values of the peculiar velocity many times larger than that from the CMBR, though surprisingly, in all cases the directions agreed with the CMBR dipole. Here we determine our peculiar motion from a sample of 0.28 million AGNs, selected from the Mid Infra Red Active Galactic Nuclei (MIRAGN) sample comprising more than a million sources. From this, we find a peculiar velocity, which is more than four times the CMBR value, although the direction seems to be within ∼2σ of the CMBR dipole. A genuine value of the solar peculiar velocity should be the same irrespective of the data or the technique employed to estimate it. Therefore, such discordant dipole amplitudes, might mean that the explanation for these dipoles, including that of the CMBR, might in fact be something else. But, the observed fact that the direction in all cases, is the same, though obtained from completely independent surveys using different instruments and techniques, by different sets of people employing different computing routines, might nonetheless indicate that these dipoles are not merely due to some systematics, otherwise why would they all be pointing along the same direction. It might instead suggest a preferred direction in the Universe, implying a genuine anisotropy, which would violate the Cosmological Principle, the core of the modern cosmology.

Preprint ARTICLE | doi:10.20944/preprints202010.0502.v1

CliGAN: A Structurally Sensitive Convolutional Neural Network Model for Statistical Downscaling of Precipitation from Multi-Model Ensembles

Chiranjib Chaudhuri, Colin Robertson

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: Statistical downscaling; Generative Adversarial Network; Combination of Errors; Convolutional Neural Network; multi-scale structural similarity index; Wasserstein GAN

Online: 25 October 2020 (19:33:49 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202008.0221.v1

Evaluation of the Severity of Major Depression Using a Voice Index for Emotional Arousal

Shuji Shinohara, Hiroyuki Toda, Mitsuteru Nakamura, Yasuhiro Omiya, Masakazu Higuchi, Takeshi Takano, Taku Saito, Masaaki Tanichi, Shuken Boku, Shunji Mitsuyoshi, Mirai So, Aihide Yoshino, Shinich Tokuno

Subject: Computer Science And Mathematics, Mathematical And Computational Biology Keywords: arousal level; emotion; major depression severity; voice index; Hurst exponent; zero-crossing rate; Hamilton Rating Scale for Depression

Online: 9 August 2020 (21:15:01 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201904.0246.v2

Mathematical Models for Possible Roles of Oxytocin and Oxytocin Receptors in Autism

Mark Gottlieb

Subject: Medicine And Pharmacology, Neuroscience And Neurology Keywords: Oxytocin, Oxytocin Receptor, Autism, Nepsys Scale, MAST Immune System Disease, Dendritic Spines, Magnocellular Neurons, Desensitization, Labor, Down Regulation

Online: 23 April 2019 (11:12:19 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201902.0189.v2

Gamma and Beta Model of Growing and Rotating Planck Ball

Satya Seshavatharam U.V, S. Lakshminarayana

Subject: Physical Sciences, Nuclear And High Energy Physics Keywords: Planck scale; Mach’s relation; quantum cosmology; critical density; ordinary matter; dark matter; expansion velocity; angular velocity; Hubble’s law

Online: 5 March 2019 (06:43:15 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201810.0629.v1

Multiscale Hydro-Meteorological Factors Variations and Its Links to Large-Scale Atmospheric Circulation Systems in the Source Region of Yangtze River

Jian Tang, Hui-Qun Cao

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: hydro-meteorological factors; large-scale atmospheric circulation systems; South Asia monsoon; streamflows; source region of the Yangtze River

Online: 26 October 2018 (11:52:13 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201810.0407.v3

On the Eternal Role of Planck Scale in Machian Cosmology

Satya Seshavatharam U.V, S. Lakshminarayana

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Planck scale; Mach’s relation; quantum cosmology; critical density; ordinary matter; dark matter; thermal redshift; expansion velocity; rotational kinetic energy; dark energy; Hubble’s law

Online: 2 November 2018 (02:30:57 CET)

Show abstract| Download PDF| Share

With reference to Planck scale, Mach's relation and by introducing two new parameters Gamma and Beta, right from the beginning of Planck scale, we make an attempt to estimate ordinary matter density ratio, dark matter density ratio, mass, radius, temperature, age and expansion velocity (from and about the Planck mass in all directions). In analogy with currently believed cosmic acceleration, with a decreasing trend of total matter density ratio, cosmic expansion velocity can be shown to be increasing. By considering

H_{0} ≅ 70

km/sec/Mpc, estimated current cosmic mass, radius, total matter density, expansion velocity, temperature and age are:

4.3352 \times 10^{53} kg,

3.207 \times 10^{26} m,

3.138 \times 10^{- 27} kg {. m}^{- 3},

2.43 c,

2.721 K

and

19.78 Billion years

respectively. Point to be noted is that, with reference to Planck scale, cosmic temperature seems to be redshifted by a factor

{(Z_{T})}_{t} ≅ \sqrt{1 + \ln (H_{p l} / H_{t})} - 1

where

(H_{p l}, H_{t})

represent Planck scale and time dependent Hubble parameters respectively. As a peculiar case, considering the equality of current Hubble parameter and current angular velocity, current cosmic rotational kinetic energy can be estimated to be 0.667 times the current critical energy. It needs further study.

Preprint ARTICLE | doi:10.20944/preprints201806.0062.v1

Optimization of Planting Structure for Irrigation Area with Biannual Cropping Patterns in Xinjiang Oasis in China

Bing Liu, Zhenhua Wang

Subject: Environmental And Earth Sciences, Environmental Science Keywords: optimization of planting structure; biannual cropping pattern; arid oasis irrigation area; moderate scale; benefit of unilateral water use

Online: 5 June 2018 (11:08:42 CEST)

Show abstract| Download PDF| Share

Light and heat resources are ample in Xinjiang plain oasis region. Planting structure is single in irrigation area, which leads to severe seasonal water shortages due to high concentration of water utilization. Therefore, how to make full use of light and heat resources to develop oasis agriculture without expanding planting scale has become the focus of research. The biannual cropping patterns are possible solutions to the problem. Manas River Irrigation area, which is located on the northern slope of Tianshan Mountain in Xinjiang in China is regarded as a typical case study to analyze the suitable planting structure and planting scale for biannual cropping pattern. The effects of optimizing planting patterns on alleviating the contradiction between water supply and water need，and the efficiency of water resources utilization was also studied. The results of the study show that：(1) the suitable planting scales of Manas River irrigation area in wet year (P = 25%), normal year (P = 50%), and low flow year (P = 75%) are about 72.66%, 78.73% and 83.91% of the current planting scale. (2) After the planting structure was optimized, the water use process in the irrigation area extends from May to August at present to April to November. The water use ratio at the peak period of water use decreased from 0.847 to 0.601, and the water use peak was significantly dispersed. (3) Economic benefits per cubic metre of water of the biannual cropping patterns increased from 8.65 yuan·m⁻³ at present to 9.45 yuan·m⁻³, 10.31 yuan·m⁻³and 11.43 yuan·m⁻³in wet year (P = 25%), in normal year (P = 50%) and low flow year (P = 75%) respectively, which proved that replanting crops could improve the efficiency of water resources utilization in irrigated areas. Therefore, the optimal planting pattern can be implemented to improve the utilization efficiency of soil and water resources in irrigation area in the arid oasis with single planting pattern with excessive concentration of water use peak and serious water shortage.

Preprint ARTICLE | doi:10.20944/preprints201702.0059.v1

Fusing Observational, Satellite Remote Sensing and Air Quality Model Simulated Data to Estimate Spatiotemporal Variations of PM2.5 Exposure in China

Tao Xue, Yixuan Zheng, Guannan Geng, Bo Zheng, Xujia Jiang, Qiang Zhang, Kebin He

Subject: Environmental And Earth Sciences, Environmental Science Keywords: fine particulate matter (PM2.5); aerosol optical depth; community multi-scale air quality (CMAQ) model; data fusion; exposure assessment

Online: 16 February 2017 (08:58:09 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202408.0982.v1

Information Properties of Consecutive Systems using Fractional Generalized Cumulative Residual Entropy

Mohamed Kayid, Mansour Shrahili

Subject: Computer Science And Mathematics, Probability And Statistics Keywords: consecutive k-out-of-n:G systems; fractional generalized cumulative residual entropy; Shannon entropy; stochastic orders; real data ;

Online: 14 August 2024 (11:18:51 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202410.1714.v1

High-performance On-orbit Intelligent Computing and Real-time Services for Remote Sensing Satellites Based on Space Large-scale Computing Power

Guoping Wang, Gang Wan, Zhijuan Su, Yang Wang, Yutong Jia, Gong Li, Shi Liang

Subject: Engineering, Aerospace Engineering Keywords: on-orbit processing; large-scale computing power; remote sensing satellites; artificial intelligence; ultra heterogeneous computing; ultra-low orbit constellations

Online: 22 October 2024 (11:04:43 CEST)

Show abstract| Download PDF| Share

The rapid advancement of Earth observation systems and satellite networks driven by commercial space has led to a significant increase in the number of remote sensing satellites, thereby establishing the groundwork for all-weather, continuous cluster collaborative observation. Following anti-irradiation hardening measures, low-cost commercial off-the-shelf (COTS) devices are effectively operated within intricate space environments, leading to substantial enhancements in on-orbit computing capabilities of individual satellites. Leveraging the on-board distributed processing framework, it fully utilizes wide-area scattered space computing resources and automatically establishes a network of neighboring satellites through inter-satellite communication links to construct a spatially distributed and computationally cooperative space cloud computing environment. This enables the sharing of space computing resources and facilitates satellite-based mission coordination, reducing reliance on ground-based remote sensing satellite services while enhancing the response efficiency of remote sensing application services. The present paper pro-vides a comprehensive review of the current development status, existing challenges, and problems faced by space-based remote sensing on-orbit processing platforms and on-board intelligent processing algorithms, starting from the immediate application requirements of remote sensing satellite in-orbit processing. In view of the anticipated surge in large-scale computing resources in space, a distributed remote sensing satellite data processing architecture based on large-scale on-board computing power is constructed, and the architecture is designed in detail from the aspects of physical architecture, software architecture, workflow and key technologies. Finally, three real-time service scenarios that align with the construction content of an ultra-low orbit satellite constellation and 6G technology have been designed to provide solutions and references for subsequent development of space-based intelligent remote sensing constellations.

Preprint REVIEW | doi:10.20944/preprints202408.1665.v1

Unmet Needs in Pain Management in Pediatric Ambulatory Surgery

Juan Manuel Redondo-Enríquez, María Rivas-Medina, Manuel María Galán-Mateos

Subject: Medicine And Pharmacology, Anesthesiology And Pain Medicine Keywords: Acute postoperative pain; ibuprofen; NSAIDs; adenotonsillectomy; pediatric opioid-free anesthesia, preemptive analgesia; multimodal analgesia; Wong-Baker visual analog scale

Online: 23 August 2024 (11:33:55 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202405.1660.v1

Environmental-Socioeconomics Factors and Technology Adoption: Empirical Evidence from Small-scale Salt Farmers in Improving Technical Efficiency in Madurese Coastal Area, East Java, Indonesia

Campina Illa Prihantini, Nuhfil Hanani, Syafrial Syafrial, Rosihan Asmara

Subject: Environmental And Earth Sciences, Sustainable Science And Technology Keywords: geomembrane; data envelopment analysis; adoption of production technology; propensity score matching; small-scale solar saltworks; Madurese coastal area; Indonesia

Online: 27 May 2024 (10:55:45 CEST)

Show abstract| Download PDF| Share

Preprint CONCEPT PAPER | doi:10.20944/preprints202309.2157.v1

Proper Diet Without Probiotic Administration May Reduce Depressive Symptoms In Patients After Bariatric Surgery: A Randomized Double-Blind Placebo Controlled Pilot Study

Natalia Komorniak, Mariusz Kaczmarczyk, Igor Łoniewski, Alexandra Martynova-Van Kley, Armen Nalian, Michał Wronski, Krzysztof Kaseja, Bartosz Kowalewski, Maricn Folwarski, Ewa Stachowska

Subject: Medicine And Pharmacology, Dietetics And Nutrition Keywords: bariatric surgery; sleeve gastrectomy; Roux-en-y gastric bypass; obesity; microbiota; gut-brain axis; beck scale; depression; diet; probiotics

Online: 30 September 2023 (07:27:10 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202309.0566.v1

Prognostic Value of a New Tool (the 3d/3d+) for Pre-dicting 30-Day Mortality in Emergency Department Patients Aged 75 Years and Older

Dolors Garcia-Pérez, Anabelén Vena-Martínez, Laura Robles-Perea, Teresa Roselló-Padullés, Joan Espaulella-Panicot, Anna Arnau

Subject: Medicine And Pharmacology, Emergency Medicine Keywords: Emergency department; Elderly; Geriatric assessment; Frailty; Frailty transitions; Mortality; Clinical Frailty Scale; Identification of Seniors at Risk screening tool.

Online: 8 September 2023 (13:00:05 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202304.0310.v1

Measuring the Awareness Levels of Alcohol and Substance Addicted Individuals and Tertiary Prevention Standards: Development of Uskudar Result Awareness and Harm Perception Scales

Nevzat Tarhan, Çiğdem Demirsoy, Aylin Tutgun Ünal

Subject: Social Sciences, Behavior Sciences Keywords: Alcohol addiction; substance addiction; self-awareness; rehabilitation; scale development; tertiary prevention; dangerous and harmful use; positive psychotherapy in addiction

Online: 13 April 2023 (08:19:34 CEST)

Show abstract| Download PDF| Share

Alcohol and substance addiction is a type of brain disease that damages many areas of life of the individual and has psychological components. Since questioning alcohol use alone is not sufficient in the diagnostic evaluation process, self-awareness and the individual's long-term psychological well-being are important in the rehabilitation process. Since investigating alcohol use alone is not sufficient in the diagnostic evaluation process, self-awareness and the individual’s long-term psychological well-being are important in the rehabilitation process. Primary prevention is used to prevent disease in healthy people, and secondary prevention is used for early diagnosis to people at risk. Tertiary prevention is important to prevent recurrence of the disease in the treated person. In addiction, which is a chronic problem, a need has emerged for tertiary prevention, that is, rehabilitation standards. If people are uncertain about the harm perception and the natural result of their behavior, they easily slip into the substance. Therefore, as a positive psychotherapy technique, harm perception and result awareness levels should be clarified. For this reason, scales were developed. The inclusion of new psychology perspectives and therapy techniques, such as positive psychology, in the treatment process requires setting new standards. In this study, it was aimed to develop result awareness and harm perception scales to determine the awareness levels and rehabilitation standards of alcohol and substance addicted individuals, and to compare awareness in normal and addicted groups. The study group consisted of 1134 participants, 41 of whom were addicts. Among the two scales developed in the study, the Uskudar Result Awareness Scale (USRAS) consisting of 25 items and 6 factor, explained 58.4% of the total variance. The Uskudar Harm Perception Scale (USHPS), consisting of 36 items and 10 factors, explained 56.3% of the total variance. Confirmatory factor analysis of the two scales resulted in acceptable goodness-of-fit values. (X2/df<3; RMSEA<.08; NFI>.90; NNFI>.95; CFI>.95; GFI>.90; AGFI>.85). In the comparisons made, the result awareness of the normal group was moderate (X=3,81); whereas the addicted group had a low result awareness (X=3,20); The effect size of the difference between the two groups was found to be high (d=1,45; >0,8). In the other measure, the harm perception of the normal group was found in the low-risk group (X=3,78); the harm perception of the addicted group was found in the moderate-risk group (X=3,43). According to Cohen d calculations, the effect size of the difference between the two groups is high (d=1,43; >0,8). It has been concluded that the two scales that emerged in the research are valid and safe, can be included in the rehabilitation studies and the creation of self-awareness, and their effectiveness should be tested.

Search Results

573 articles found