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Preprint ARTICLE | doi:10.20944/preprints202403.0637.v1

Adaptive Control of Quadrotors in Uncertain Environments

Daniel Leitao, Rita Cunha, Joao M Lemos

Subject: Engineering, Control And Systems Engineering Keywords: Quadrotor control; adaptive control; reinforcement learning

Online: 11 March 2024 (13:57:45 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.0740.v1

Automated Non-Sterile Pharmacy Compounding: A Multi-Site Study in European Hospital and Community Pharmacies with Pediatric Immediate Release Propranolol Hydrochloride Tablets

Niklas Sandler, Farnaz Shokraneh, Mahsa Bahman, Julius Lahtinen, Niko Hassinen, Sari Airaksinen, Soumya Verma, Ludmila Hrizanovska, Jana Lass, Jyrki Heinämäki, Urve Paaver, Anssi Karlstedt, Janika Tähnas, Christoph Klaas, Catharina Kern, Adeline Bienfait, Frédéric Lagarce, Dominic Fenske, Katrin Muehlenfeld, Julia Malik, Holger Scherliess, Samuli Ojala, Sara P Cruz, Mattias Paulsson, Katja Kammonen, Maria Rautamo, Hendrik Lueck, Herwig Heindl, Laurent Carrez, Antoine Pierrot, Ralf Harnish, Stephanie Stareprawo, Marija Tubic-Grozdanii, Stefanie Zibolka, Uli Loesch, Martina Jeske, Ulrich Griesser, Karin Hummer, Andreas Thalmeier, Marianne Leitner, Susan Bischoff, Ralph Heimke-Brinck, Janine Paulus-Rohmer, Karim Khouckh, Fabien Bruno, Anna Harjans, Torsten Hoppe-Tichy

Subject: Medicine And Pharmacology, Pharmacy Keywords: automated compounding; hospital and community pharmcies; pharm inks; integrated quality control

Online: 13 March 2024 (12:02:20 CET)

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Preprint ARTICLE | doi:10.20944/preprints202307.0984.v1

Improvement and Control of the Customer Service System, through a simulation of the Waiting Line model: case study in a telecommunications company

José David Barros Enriquez, Leonardo Arturo Baque Mite, Angel Moises Avemañay Morocho, Milton Ivan Villafuerte Lopez

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: continuous improvement; waiting line; DMAIC; simulation; process control; productivity; customer service

Online: 14 July 2023 (07:53:30 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202312.0287.v1

The Effect of Environment on Case Hardening Characteristics of AISI 1018 Steel during Cassava Leaf Pack Cyaniding

Renee Erica Gordon, Egwu Eric Kalu, Adelana Rasak Adetunji, Dorr Campbell, Peter N Kalu

Subject: Chemistry And Materials Science, Metals, Alloys And Metallurgy Keywords: case hardening; surface treatment; diffusion; cassava; steel microstructure; microhardness ;

Online: 5 December 2023 (17:04:45 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0927.v1

The Effect of Model Similarity on Exercise Self-Efficacy Among Adults Recovering from a Stroke: A Mixed-Method Single Case Experimental Research Design

Olivia Pastore, François Jarry, Jammy Zou, Jennifer R. Tomasone, Luc J. Martin, Véronique Pagé, Shane Sweet

Subject: Social Sciences, Psychology Keywords: mixed-method; modelling; peers; single-case design; self-efficacy; stroke

Online: 14 November 2023 (15:21:18 CET)

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Preprint ARTICLE | doi:10.20944/preprints202305.0158.v1

The Health Silk Road: A Double-Edged Sword? Assessing the Implications of China's Health Diplomacy under Covid-19

Shaoyu Yuan

Subject: Social Sciences, Political Science Keywords: China; Covid-19; Health Silk Road; Case Study; Global Heath

Online: 3 May 2023 (13:08:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202201.0388.v1

Air Pollution and Emergency Department Visits for Infectious Diseases in Toronto, Canada

Mieczysław Szyszkowicz, Nicholas de Angelis

Subject: Medicine And Pharmacology, Emergency Medicine Keywords: ambient air pollution; case-crossover; cluster; concentration; counts; strata; urban

Online: 25 January 2022 (17:16:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0267.v1

A single-case design investigation for measuring the efficacy of Gestalt therapy to treat depression in older adults with dementia in Italy and in Mexico: a research protocol

Alessandra Merizzi, Rosanna Biasi, José Fernando Álvarez Zamudio, Margherita Spagnuolo Lobb, Sara Santini

Subject: Social Sciences, Psychology Keywords: Gestalt therapy; dementia; depression; single-case experimental design; psychosocial interventions

Online: 19 January 2022 (09:32:12 CET)

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Preprint REVIEW | doi:10.20944/preprints202111.0546.v1

Review on Chemical Graph Theory and Its Application in Computer-Assisted Structure Elucidation

Mehmet Aziz Yirik, Kumsal Ecem Colpan, Saskia Schmidt, Maria Sorokina, Christoph Steinbeck

Subject: Chemistry And Materials Science, Analytical Chemistry Keywords: chemical graph theory; computational chemistry; CASE; computer-assisted structure elucidation

Online: 29 November 2021 (15:35:43 CET)

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Preprint ARTICLE | doi:10.20944/preprints202103.0027.v1

Science Informed Water Management Policies

Daniel P. Loucks

Subject: Business, Economics And Management, Accounting And Taxation Keywords: science; policy making; systems models; communication; case studies; water management

Online: 1 March 2021 (14:07:43 CET)

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Preprint ARTICLE | doi:10.20944/preprints201903.0111.v1

Cyber Security Framework for the Internet-of-Things in Industry 4.0

Petar Radanliev, Rafael Mantilla Montalvo, Stacy Cannady, Razvan Nicolescu, Dave De Roure, Jason R.C. Nurse, Michael Huth

Subject: Engineering, Control And Systems Engineering Keywords: Industry 4.0., Internet of Things, case study, cyber security framework

Online: 8 March 2019 (15:27:11 CET)

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Preprint ARTICLE | doi:10.20944/preprints201801.0262.v1

Index Cost Estimation Using Case Based Reasoning Model Based on Macro BIM

Krzysztof Zima, Agnieszka Leśniak

Subject: Engineering, Civil Engineering Keywords: Building Information Modeling; Case Based Reasoning; cost estimating; information management

Online: 28 January 2018 (16:43:50 CET)

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Preprint ARTICLE | doi:10.20944/preprints201703.0142.v1

The Effects of PM_2.5 from Asian Dust Storms on Emergency Room Visits for Cardiovascular and Respiratory Diseases

Ssu-Ting Liu, Chu-Yung Liao, Hsien-Wen Kuo

Subject: Environmental And Earth Sciences, Environmental Science Keywords: Air pollution, PM2.5, emergency room, Asian dust storms, case-crossover

Online: 17 March 2017 (18:13:31 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.0920.v1

Progressive Optimal Fault-Tolerant Control Combining Active and Passive Control Manners

Dan Du, Zetao Li, B. Dahhou

Subject: Engineering, Control And Systems Engineering Keywords: passive fault-tolerant control; active fault-tolerant control; progressive optimal fault-tolerant control; guaranteed robust cost control

Online: 15 March 2024 (12:10:49 CET)

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Preprint ARTICLE | doi:10.20944/preprints202310.1980.v1

The Research on Controlling Groundwater Pollution Caused by In-Situ Leaching Uranium: A Case Study in Bayan-Uul Area, Northern China

Haibo Li, Zhonghua Tang, Dongjin Xiang

Subject: Environmental And Earth Sciences, Pollution Keywords: Uranium; In-situ leaching; Reactive transport model; Capture zone; Streamline; pollution control

Online: 31 October 2023 (08:12:28 CET)

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Preprint ARTICLE | doi:10.20944/preprints201706.0089.v1

Development of Sliding Mode Controller for A Modified Boost Cuk Converter Configuration

Sanjeevikumar Padmanaban, Emre Ozsoy, Viliam Fedák

Subject: Engineering, Electrical And Electronic Engineering Keywords: Closed Loop Control; Cuk Converter; Sliding Mode Control; Robustness; Active Hysterisis Control

Online: 19 June 2017 (16:52:57 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0044.v1

Application of Active Disturbance Rejection in a Bearingless Machine with Split Winding

Rodrigo de Andrade Teixeira, Werbet Luiz Almeida da Silva, Adson Emanuel Santos Amaral, Walter Martins Rodrigues, Andres Ortiz Salazar, Elmer Rolando Llanos Villarreal

Subject: Engineering, Electrical And Electronic Engineering Keywords: ADRC control; induction machine; radial position control

Online: 2 March 2023 (12:21:12 CET)

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Preprint ARTICLE | doi:10.20944/preprints202209.0045.v1

Development and Testing of an Integrated Energy-Efficient Vehicle Speed and Traffic Signal Controller

Hao Chen, Hesham Rakha

Subject: Engineering, Civil Engineering Keywords: Traffic signal congrol; vehicle control; integrated control

Online: 5 September 2022 (04:47:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0672.v1

Model Predictive Control for a Recover Water Process

Paolo Mercorelli

Subject: Engineering, Control And Systems Engineering Keywords: linear model predictive control; process control; stability

Online: 29 October 2018 (10:57:05 CET)

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Preprint ARTICLE | doi:10.20944/preprints201806.0322.v1

Design of IMC Oriented PID Control Law for Typical Thermal Process in Thermal Power Plant

Yin Ke

Subject: Engineering, Energy And Fuel Technology Keywords: internal mode control,PID control,robustness,simulation

Online: 20 June 2018 (12:10:30 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202107.0081.v1

Study of the Influence of a Nonlinear Control Allocation Frequency Variation on a Quadrotor Tilt-Rotor Aircraft Stability

Murillo Ferreira dos Santos, Paolo Mercorelli, Leonardo de Mello Honório, Mathaus Ferreira da Silva, Vinícius Ferreira Vidal

Subject: Engineering, Automotive Engineering Keywords: Over-Actuated Unmanned Aerial Vehicle; Nonlinear Control Allocation; Software In10 The Loop; Threshold Time

Online: 5 July 2021 (09:30:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202205.0352.v1

Artificial Neuron-based Model for a Hybrid Real-Time System: Induction Motor Case Study

Manuel Isidoro Capel

Subject: Computer Science And Mathematics, Applied Mathematics Keywords: Quality real-time systems; Automated Machine Learning; Real-time embedded control systems; Cyber-physical systems; Neural Networks

Online: 25 May 2022 (11:17:19 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.0751.v1

Effects of Erosion Control Works: Case Study –Reservoir Celije, Rasina River Basin, the Zapadna Morava River (Serbia)

Irina Stefanović, Ratko Ristić, Nada Dragović, Milutin Stefanović, Nada Živanović, Jelena Čotrić

Subject: Environmental And Earth Sciences, Soil Science Keywords: soil erosion, Erosion Potential Method, erosion coefficient, erosion control works, sediment, sediment transport, slope siltation

Online: 13 February 2024 (14:24:47 CET)

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Preprint ARTICLE | doi:10.20944/preprints202210.0274.v1

Sliding Mode-based Traction Control System Design for Electric Scooter BLDCM through Field-Oriented Vector Control Approach

Caglar Uyulan, Ersen Arslan

Subject: Engineering, Control And Systems Engineering Keywords: Field Oriented Control (FOC); electric scooter; Traction Motor Control System; Sliding Mode Control

Online: 19 October 2022 (08:27:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.1847.v1

Study on Emission Control of Berthing Vessels-Based on Non-cooperative Game Theory

Qin Wang, Minhang Jiang, Shiyao Man, Jiajie Zhou

Subject: Environmental And Earth Sciences, Sustainable Science And Technology Keywords: ship emissions; air pollution; ship emission control policies; emission reduction; non-cooperative game; green shipping; low sulfur fuel

Online: 26 May 2023 (04:29:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201809.0556.v1

A Study about Performance and Robustness of Model Predictive Controllers in WECs Systems

Rafael Guardeño, Agustín Consegliere, Manuel J. López

Subject: Engineering, Control And Systems Engineering Keywords: wave energy converter; model predictive control; comparitive of robustness; embedded integrator; mathematical model; identification methodology; real time series

Online: 28 September 2018 (08:21:41 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202401.0457.v1

Induction Motor Improved Vector Control Using Predictive and Model Free Algorithms Together with Homotopy-based Feedback Linearization

Madalin Costin, Corneliu Lazar

Subject: Engineering, Control And Systems Engineering Keywords: induction machine; vector control; homotopy-based feedback linearization; cascade control structure; predictive current control; box constraints; model free control.

Online: 5 January 2024 (04:45:38 CET)

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Preprint CASE REPORT | doi:10.20944/preprints202401.2106.v1

Application of X-STRs for Forensic Identification in Mixed DNA Profile: A Case Report

Nunzia Ilaria Vacca, Giacoma Mongelli, Stefania Ceccardi, Vincenzo Agostini

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: X-Chromosomal markers; X-STRs; DNA; mixture; Forensic genetics; Case Report

Online: 30 January 2024 (12:49:54 CET)

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Preprint ARTICLE | doi:10.20944/preprints202307.1847.v1

Teaching Data Science with Literate Programming Tools

Marcus Birkenkrahe

Subject: Computer Science And Mathematics, Other Keywords: Data Science; Literate Programming; Teaching, Emacs; Org-mode; IDE; Case Study

Online: 27 July 2023 (10:31:08 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints202306.0432.v1

Enterobius Vermicularis Related Acute Appendicitis: A Case Report and Review of the Literature

Shabnam Chhetri, Ahmed Hamood Al Mamari, Mahmood Mausd Al Awfi, Nasser Humaid Nasser Al Khaldi, Nibras Mejbel Abed, Nenad Pandak, Faryal Khamis, Zakariya Al Balushi, Rashid Mohammed Khamis Alalawi, Sultan Al Lawati, Muna Ba’Omar, Nasser Shukaili, Seif Al-Abri

Subject: Public Health And Healthcare, Public Health And Health Services Keywords: parasitological diseases; Oman; appendicitis; Enterobius vermicularis; case report; helminths; appendix; pinworms

Online: 6 June 2023 (09:50:22 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints202205.0329.v1

Apple Watch for Pulse Rate Assessment Detects Unidentified Paroxysmal Atrial Fibrillation

Kiichi Hirota, Maretoshi Hirai

Subject: Medicine And Pharmacology, Cardiac And Cardiovascular Systems Keywords: Apple Watch; wearable sensor; pulse rate; arrhythmia; atrial fibrillation; case report

Online: 24 May 2022 (09:49:08 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints202201.0250.v1

Complicated Mandible Fracture Treatment With Xenogenic Bone Graft: A Case Report

Ekaterina Diachkova, Sofia Popova, Liana Arazashvili, Pavel Petruk, Igor' Cherkesov

Subject: Medicine And Pharmacology, Dentistry And Oral Surgery Keywords: case report; fracture; mandible; osteosynthesis; mini-plate; titanium nickelide; collagenic xenograft

Online: 18 January 2022 (10:33:00 CET)

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Working Paper CASE REPORT

Asymmetric Bone Marrow Involvement in Patients with Acute Leukemia After Allogeneic Hematopoietic Stem Cell Transplantation：Two Case Reports and Literature Review

Wei Shi, Xiaotian Xia, Yingying Wu, Junxia Yao, Wanxin Chen, Xuan Lu, Liang Tang, Linghui Xia, Yong You, Yu Hu

Subject: Medicine And Pharmacology, Transplantation Keywords: asymmetric； blasts；acute leukemia； allogeneic hematopoietic stem cell transplantation； case report

Online: 7 May 2020 (10:53:42 CEST)

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Background: After allogeneic hematopoietic stem cell transplantation (allo-HSCT), acute leukemia relapse is common, and asymmetric bone marrow recurrence hasn’t been reported. Because the anatomical distribution of acute leukemia clones in the bone marrow after allo-HSCT is presumed to be diffuse, bone marrow aspirations are performed in single site. Case presentation: We identified two acute leukemia patients, whose leukemic burden in bilateral bone marrow specimens differed significantly. The first case was a 20-year-old man who was diagnosed with acute myelomonocytic leukemia and received haploidentical allo-HSCT. He had been in complete remission for two years and off immunosuppressive medications for a year, with normal peripheral blood count. Routine bone marrow biopsy of his left posterior iliac bone marrow showed 52% leukemia blasts, while the right side had 0% blasts ten days later. Due to the discordant results, the patient refused further intervention and died of high leukocyte syndrome four months later. The second case was a 23-year-old woman who was diagnosed with acute B lymphoblastic leukemia and received HLA-identical sibling allo-HSCT. Although 62% of blasts were found in her left iliac marrow on day +122, 0 % of blasts were found on a sample obtained from the right iliac crest on day +128. Whole-body 18F-FDG PET/CT scans confirmed that the leukemic infiltration in her bone marrow was asymmetric. Considering the higher leukemic burden on the left, we chose the left posterior iliac crest aspiration for further response evaluation. After chemotherapy combined with donor lymphocyte infusion, she achieved transient hematologic complete remission. She died of septic shock with heart failure at +258 days after allo-HSCT before infusion of anti-CD19 donor chimeric antigen receptor T cells. Conclusions: To our knowledge, these are the first case reports of asymmetric bone marrow infiltration of blasts in acute leukemia patients after allo-HSCT. Bilateral posterior iliac crest aspirations or 18F-FDG-PET/CT scans may help distinguish such distribution. If discordant bone marrow specimens are observed, physicians should restrict future bone marrow studies to the more involved side.

Preprint ARTICLE | doi:10.20944/preprints202001.0121.v1

Challenges of UAVs Adoption for Agricultural Pesticide Spraying: A Social Cognitive Perspective

Ting-Chu Hsieh, Ming-Chien Hung, Mai-Lun Chiu, Pay-Jiing Wu

Subject: Social Sciences, Behavior Sciences Keywords: unmanned aerial vehicles; smart farming; precision agriculture; technological frames; case study

Online: 12 January 2020 (14:48:29 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.0517.v1

COVID-19, Tattoos and How It Has Affected Locus of Control, Risk-Taking Behaviour, Self-Esteem and Body Image: A Quantitative Study

KUNAL DEVENDRA KONDHARE

Subject: Social Sciences, Psychology Keywords: Covid-19; tattoos; Locus of Control; Self-esteem; body image; Risk-taking behaviour

Online: 12 March 2024 (03:05:50 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.1357.v1

Revisiting Classical Controllers Design and Tuning with Genetic Programming

Carlos A. García, Manel Velasco, Cecilio Angulo, Pau Marti, Antonio Camacho

Subject: Engineering, Control And Systems Engineering Keywords: genetic algorithm; genetic programming; control design; control tuning

Online: 22 November 2023 (07:49:09 CET)

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Preprint ARTICLE | doi:10.20944/preprints202306.0314.v1

Dynamic Modeling and Passivity Based Control of the RV-3SB Robot

Manuel Cardona, Fernando Serrano, Cecilia García-Cena

Subject: Computer Science And Mathematics, Robotics Keywords: Dynamic output feedback control; Robotics; Passivity based control

Online: 6 June 2023 (02:18:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202111.0536.v1

Experimental Comparison of PID Based RPM Control for Long Horizontal vs. Vertical Drillstring

Aditya Sharma, Saket Srivastava, Catalin Teodoriu, Marius Stan

Subject: Engineering, Control And Systems Engineering Keywords: PID tuning; drilling vibrations; feedback control; RPM control

Online: 29 November 2021 (12:39:42 CET)

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Preprint ARTICLE | doi:10.20944/preprints201808.0182.v2

Active Vibration Control of Launch Vehicle on Satellite Using Piezoelectric Stack Actuator

Mehran Makhtoumi

Subject: Engineering, Mechanical Engineering Keywords: Vibration Control, Piezoelectric, Fuzzy Logic Control, Launch Vehicle

Online: 21 December 2018 (11:12:32 CET)

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Preprint ARTICLE | doi:10.20944/preprints201905.0112.v1

Mechanical and Control Design of an Industrial Exoskeleton for Advanced Human Empowering in Heavy Parts Manipulation Tasks

Alessandro Mauri, Jacopo Lettori, Giovanni Fusi, Davide Fausti, Maurizio Mor, Francesco Braghin, Giovanni Legnani, Loris Roveda

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: industrial exoskeleton design; industrial exoskeleton control; human-robot collaboration; optimal control; empowering fuzzy control

Online: 9 May 2019 (12:53:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0809.v1

Enabling Passive Load-Holding Function and System Pressures Control in a One-Motor-One-Pump Motor-Controlled Hydraulic Cylinder: Simulation Study

Wei Zhao, Morten Kjeld Ebbesen, Michael Rygaard Hansen, Torben Ole Andersen

Subject: Engineering, Mechanical Engineering Keywords: Motor-controlled hydraulic cylinder; four-quadrant operation; system pressures control; passive load-holding function

Online: 11 April 2024 (11:26:28 CEST)

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Preprint REVIEW | doi:10.20944/preprints202403.0485.v1

Continued Process Verification Monitoring: Optimizing Control Chart Design by Reducing the False Alarm Rate and Nuisance Signals

Naveenganesh Muralidharan, Thatsinee Johnson, Leyla Saeednia Rose, Mark Davis

Subject: Engineering, Bioengineering Keywords: CPV; Control Chart False Alarm Rate; Control chart skewness and Kurtosis; Control chart nuisance signal

Online: 8 March 2024 (15:31:28 CET)

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The Food and Drug Administration’s 2011 Process Validation Guidance and International Council for Harmonization Quality Guidelines recommend continued process verification (CPV) as a mandatory requirement for pharmaceutical, biopharmaceutical, and other regulated industries. As a part of product life cycle management, after process characterization in stage 1 and process qualification and validation in stage-2, CPV is performed as stage-3 validation during commercial manufacturing. CPV ensures that the process continues to remain within a validated state. CPV requires the collection and analysis of data related to critical quality attributes, critical material attributes, and critical process parameters on a minimum basis. Data is then used to elucidate process control regarding the capability to meet predefined specifications and stability via statistical process control tools. In statistical process control, control charts and Nelson rules are commonly used throughout the industry to monitor and trend data to ensure that a process remains in control. In the control chart, the mean value is taken as the center line, and 3σ limits are placed on either side of the center line. In CPV, manufactured lots are summarized, trended, and discussed at a cross-functional level at pre-defined intervals (either weekly, bi-weekly, or even monthly) based on the batch run rate. A cross-functional team assesses details regarding 1) violation frequency, 2) statistical strength of the signal, 3) violation magnitude and its impact on process or quality, and 4) any potential root causes for out-of-expectation or out-of-trend signals. The cross-functional team must analyze whether any signal identified by the control chart is reliable and must determine whether corrective action should be taken and justify the decision in the CPV meeting minutes based on statistical strength and reliability of the signal. However, basic control charts are susceptible to false alarms and nuisance alarms. Therefore, it is imperative to understand the assumptions behind control charts and the inherent false alarm rates for different Nelson rules. In this article, the authors have detailed the assumptions behind the usage of control charts, the rate of false alarms for different Nelson rules, the impact of skewness and kurtosis of a data distribution on the false alarm rate, and methods for optimizing control chart design by reducing false alarm rates and nuisance signals.

Preprint ARTICLE | doi:10.20944/preprints201905.0283.v1

Current Mode Control of a Series LC Converter Supporting Constant-Current Constant-Voltage (CCCV)

Michael Heidinger, Qihao Xia, Christoph Simon, Fabian Denk, Santiago Eizaguirre, Rainer Kling, Wolfgang Heering

Subject: Engineering, Electrical And Electronic Engineering Keywords: control; current mode control; voltage control; transfer function; power converter; soft-switching converter; battery charging;

Online: 23 May 2019 (12:58:27 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.0914.v1

Tuning of PID Controllers using Reinforcement Learning for Nonlinear Systems Control

Gheorghe Bujgoi, Dorin Sendrescu

Subject: Engineering, Control And Systems Engineering Keywords: learning-based control; nonlinear systems control; PID controller; bioprocess

Online: 15 March 2024 (12:12:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.1336.v1

Stable Heteroclinic Channel-based Movement Primitives: Tuning Trajectories using Saddle Parameters

Natasha Rouse, Kathryn Daltorio

Subject: Engineering, Control And Systems Engineering Keywords: biologically-inspired robots; robust control; optimal control; motion planning

Online: 23 February 2024 (09:56:00 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.1326.v1

Design and Implementation of a MIMO Integral Resonant Control for Active Vibration Control of Pedestrian Structures

Emiliano Pereira, Xidong Wang, Iván M. Díaz, Sumeet S. Aphale

Subject: Engineering, Control And Systems Engineering Keywords: Active Vibration Control; Human-Induced Vibrations; Integral Resonant Control

Online: 22 February 2024 (16:17:25 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.0567.v1

Discrete-Time Adaptive Control for Uncertain Scalar Multiagent Systems with Coupled Dynamics: A Lyapunov-Based Approach

Islam A. Aly, Kadriye Merve Dogan

Subject: Engineering, Control And Systems Engineering Keywords: multiagent system; discerete-time control; adaptive control; coupled dynamics

Online: 8 December 2023 (07:31:43 CET)

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Preprint ARTICLE | doi:10.20944/preprints202310.1100.v1

Robust Control of An Inverted Pendulum System Based on Policy Iteration in Reinforcement Learning

Xu Dengguo, Ma Yan, Huang Jiashun, Li Yahui

Subject: Engineering, Control And Systems Engineering Keywords: robust control; optimal control; inverted pendulum system; reinforcement learning

Online: 17 October 2023 (13:04:30 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.1319.v1

Cooperative Cruise Control for Intelligent Connected Vehicles: A Bargaining Game Approach

Miguel F. Arevalo-Castiblanco, Jaime Pachon, Duvan Tellez-Castro, Eduardo Mojica-Nava

Subject: Engineering, Control And Systems Engineering Keywords: emulation systems; cooperative cruise control; bargaining games; predictive control

Online: 19 July 2023 (10:08:52 CEST)

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Working Paper REVIEW

Mindfulness and Cognitive Control: A Review on their Dual Mode Mechanisms

Immanuel Babu Henry Samuel, Michelle Costanzo

Subject: Social Sciences, Psychology Keywords: mindfulness; cognitive control; dual mode mechanisms; dual mode control

Online: 16 December 2020 (13:26:55 CET)

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Preprint ARTICLE | doi:10.20944/preprints202006.0099.v1

Modelling Design and Control of an Electromechanical Mass Lifting System Using Optimal and Robust Control Method

Mustefa Jibril, Messay Tadese, Eliyas Alemayehu

Subject: Engineering, Control And Systems Engineering Keywords: μ –synthesis; linear quadratic regulator; optimal control; robust control

Online: 7 June 2020 (15:22:32 CEST)

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Preprint REVIEW | doi:10.20944/preprints201811.0127.v1

A Survey on Access Control in the Age of IoT

Jing Qiu, Chunlai Du, Shen Su, Qi Zuo, Zhihong Tian

Subject: Computer Science And Mathematics, Computer Science Keywords: IoT search; access control; attribute-based access control; survey

Online: 6 November 2018 (04:18:40 CET)

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Preprint ARTICLE | doi:10.20944/preprints201806.0265.v1

Adaptive Trajectory Tracking Control of a Quadrotor Based on Iterative Learning Algorithm

Mohammad Mehdi Farzaneh, Alireza Tavakolpour-Saleh

Subject: Engineering, Control And Systems Engineering Keywords: Quadrotor; trajectory tracking control; PID control; iterative learning algorithm.

Online: 18 June 2018 (13:43:18 CEST)

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Preprint REVIEW | doi:10.20944/preprints202312.1437.v1

Dengue Fever Epidemics and The Prospect of Vaccines: A Systematic Review and Meta-Analysis Using Clinical Trials in Children

Ebele C. Okoye, Amal K. Mitra, Terica Lomax, Cedric Nunaley

Subject: Public Health And Healthcare, Public Health And Health Services Keywords: dengue fever; clinical trials; case-cohort studies; children; vaccine; PRISMA; meta-analysis.

Online: 19 December 2023 (11:30:39 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.1171.v1

Improvement of Industrial Maintenance Plans through Assisted-Driven Design RCM-CBR

Néstor Rodríguez-Padial, Marta M. Marín, Rosario Domingo

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: case-based reasoning; reliability centered maintenance; fuzzy logic technique; risk priority number

Online: 15 December 2023 (14:51:16 CET)

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Preprint ARTICLE | doi:10.20944/preprints202307.1995.v2

Influence of External Stakeholders in the Digital Transformation Process of an HEI Post COVID

Vicente Díaz-García, Antonio Montero-Navarro, José-Luis Rodríguez-Sánchez, Rocío Gallego-Losada

Subject: Business, Economics And Management, Business And Management Keywords: digital transformation; Higher Education Institutions; students; alumni; Providers; employer companies; case method

Online: 18 September 2023 (02:33:33 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints202309.0959.v1

T Lymphoblastic Lymphoma Hiding in Mature Plasmacytoid Dendritic Cell Proliferation: A Case Report and Literature Review

Cong Deng, Bei-bei Gao, Tian-li Wang, Xiao-Na Chang, Gui-xiang Xiao, Qin Xia, Hua-xiong Pan, Xiu Nie

Subject: Medicine And Pharmacology, Hematology Keywords: mature plasmacytoid dendritic cell proliferation, T lymphoblastic lymphoma, myeloid neoplasms, case report

Online: 14 September 2023 (07:22:23 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints202307.0971.v1

Complementary Use of a Next-Generation Emollient Plus and Pimecrolimus in Atopic Dermatitis: A Case Report

Tiago Torres

Subject: Medicine And Pharmacology, Dermatology Keywords: atopic dermatitis; emollient plus cream; topical corticosteroids; topical calcineurin inhibitors; case report

Online: 14 July 2023 (09:18:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.0180.v1

Optimizing a Green and Sustainable Off-grid Energy System Design Enhancing with a Real Case

Nickyar Ghadirinejad, Fredric Ottermo, Raheleh Nowzari, Naif Alsaadi, Mazyar Ghadiri Nejad

Subject: Engineering, Energy And Fuel Technology Keywords: Renewable energy; Photovoltaic arrays; Wind turbines; Particle swarm optimization; real-case problems

Online: 5 July 2023 (04:19:53 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202107.0185.v4

COVID-19: Three Phases of the Pandemic. Dynamics Of Cases, Deaths And Tests Related To SARS-CoV-2 A Systematic Analysis of 213 Countries and Territories

Mikhail Teppone

Subject: Medicine And Pharmacology, Epidemiology And Infectious Diseases Keywords: COVID-19; Phases of the pandemic; Mortality rate; Case fatality ratio; Infection fatality ratio

Online: 25 January 2022 (10:03:09 CET)

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Background: Since the previous study dealing with the case fatality ratio and infection fatality ratio caused by COVID-19, the author has received many comments that prompted the question: "Why did an optimistic prognosis fail?" To answer this question, a more detailed and expanded analysis was carried out in a new study. Objective: To evaluate the dynamics of monthly numbers of cases, deaths, tests and CFR worldwide during three phases of the COVID-19 pandemic. Material and Methods: Twenty three sets of databases, dated the 22nd of each month from January 2020 to November 2021, for 213 countries were collected from the Worldometer website. The number of cases, deaths, tests, CFR, IFR, etc. were counted for various periods of time for each of the 213 countries, then results related to different periods of time were compared. Results: The analysis of the main epidemiological parameters led to the division of three phases of the global pandemic evolution. The first phase (23.01.20-22.07.20), the second phase (23.07.20-22.01.21) and the third phase (23.01.21-22.07.21) were different in terms of the number of tests performed, new cases, and mortality due to COVID-19. By the end of the second phase, the worldwide statistics indicated the imminent end of the pandemic, but the third phase was characterized by a sudden rise in the number of new cases and deaths that could not be explained rationally. The most dramatic evolution of the epidemic curve occurred in the countries where doctors had successfully battled COVID-19 during the first two phases of the pandemic. Conclusions: Despite the decrease in overall death numbers during the latest months analyzed, additional study is necessary to identify the cause for the increase in the number of new cases and deaths during the third phase of the pandemic. Only complete information regarding the positive and negative impact of medical and non-medical methods of diagnostics and prophylaxis of COVID-19 can help to organize effective measures to end the current pandemic and prevent a similar one from occurring in the future. Presumably, there are several causes of the negative evolution of the current pandemic, including the overreliance on PCR tests, application of non-specialized premises for quarantine and treatment, decrease in herd and individual immunity, inadequate change of therapeutic protocols, and ignoring prophylactic treatment. It can be suggested that the use of immunemodulatory drugs, for example, thymus extract or thymic peptides, in groups of people with compromised immunity is necessary, and prophylactic and therapeutic protocols should be changed from the 'standard' types to 'personalized' ones.

Preprint ARTICLE | doi:10.20944/preprints202010.0148.v2

The Quest for Sustainable Teaching Praxis: Opportunities and Challenges of Multidisciplinary and Multicultural Teamwork

Elli Doukanari, Despo Ktoridou, Leonidas Efthymiou, Epaminondas Epaminonda

Subject: Business, Economics And Management, Accounting And Taxation Keywords: Sustainable Teaching; multidisciplinary; multicultural; teams; Case-based Learning; Problem-based Learning; teamwork

Online: 26 April 2021 (15:38:20 CEST)

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Working Paper CASE REPORT

Infiltrative Tuberculosis, Herpes Zoster, and Melanoma as Comorbidities in Systemic Lupus Erythematosus and Antiphospholipid Syndrome: a Case Report

Tatiana Reshetnyak, Anastasia Shumilova, Fariza Cheldieva, Alexander Lila

Subject: Medicine And Pharmacology, Immunology And Allergy Keywords: antiphospholipid syndrome; systemic lupus erythematosus; melanoma; pulmonary tuberculosis; herpes zoster; case report

Online: 12 January 2021 (17:05:16 CET)

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Working Paper ARTICLE

Trends In Cumulative Incidence and Case Fatality Of COVID-19 in The United States: Extreme Epidemiologic Response

Laurens Holmes. Jr, Glen Philipcien, Keeti Deepika, Chinaka Chinacherem, Prachi Chavan, Janille Williams, Benjamin Ogundele, Kirk Dabney, Maura Poleon, Lavisha Pelaez, Tatiana Picolli, Valescia John, Leslie Stalnaker, Michael Enwere

Subject: Medicine And Pharmacology, Epidemiology And Infectious Diseases Keywords: COVID-19; SARS-CoV2; extreme epidemiology response; population at risk; case fatality

Online: 12 April 2020 (14:08:15 CEST)

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Objectives: COVID-19, a respiratory disease caused by SARS-COV2 and transmitted from person-to-person through viral droplets remains a global pandemic. There is a need to understand the transmission modes, populations at risk, and how to mitigate the spread and case fatality in the United States (US) and globally. The current study aimed to assess the global COVID-19 transmission and case fatality, examine similar parameters by countries and determine evidence-based practice in extreme epidemiology response in epidemic curve flattening and case fatality reduction. Methods: A cross-sectional ecologic design was used to assess the preexisting data on confirmed COVID-19 cases and mortality in March 2020 from the CDC, WHO, Worldodomter, and STATISTA. A rapid assessment between March 23^rdand 31^st, 2020, was utilized for the extreme epidemiology response. The case fatality, termed fatality proportion, was examined using mortality in relation to confirmed cases involving the world, United States of America (USA), United Kingdom (UK), Italy, France, Spain, China, Germany, India and South Korea. Results: The COVID-19 is a global pandemic, with the US as the epicenter for transmission, representing 20.9% of all confirmed cases worldwide, while Italy is the epicenter for case fatality, 30.6% of mortality as at 03/31/ 2020. The fatality proportion (FP) in Italy was 11.4%, Spain (8.8%), France (6.8%) and UK (6.4%). Despite the increased number of confirmed cases, the lowest FP was observed in Germany (0.96%) and South Korea (1.66%). There is increasing linear tends in transmission in the US, R²=0.97 as well as positive daily percentage change, ranging from 1.27% to 20.5%. Conclusions: The USA remains the epicenter for COVID-19 transmission, while Italy is the epicenter for case fatality. The observed relatively low case fatality in Germany and South Korea is due to an “extreme epidemiology” response through the application of Wuhan, China’s early data on COVID-19 transmission control measures and optimized patient care. These data are suggestive of relaxing the clinical guidelines in the United States in COVID-19 testing, application of contact tracing and testing, case isolation and most importantly enhancing resources for case management and social and physical distancing globally, hence epidemic curve flattening and case fatality reduction.

Preprint REVIEW | doi:10.20944/preprints201912.0054.v1

Social Media Collaboration in Software Project Management

Sania Imran, Faiqa Mehboob, Mehreen Sirshar

Subject: Social Sciences, Media Studies Keywords: Social Media; PMBOK knowledge areas; Delphi Study; Structured Case Study; Team effectiveness

Online: 4 December 2019 (12:37:54 CET)

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Preprint ARTICLE | doi:10.20944/preprints202305.1067.v1

Optimization Imposition upon Drone Gimbal Control Electronics

Erhe Zheng, Timothy Sands

Subject: Engineering, Electrical And Electronic Engineering Keywords: P+V controller; Double integrator patching filter; control law inversion patching filter; RTOC control; open loop control; feedback control; Monte Carlo model

Online: 16 May 2023 (02:38:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.0555.v1

Postural instability and risk of falls in patients with Parkinson’s disease treated with deep brain stimulation: a stabilometric platform study

Giorgio Leodori, Marco Santilli, Nicola Modugno, Michele D’Avino, Maria Ilenia De Bartolo, Andre Fabbrini, Lorenzo Rocchi, Antonella Conte, Giovanni Fabbrini, Daniele Belvisi

Subject: Medicine And Pharmacology, Neuroscience And Neurology Keywords: deep brain stimulation; fall risk; falls; parkinson’s disease; postural instability; stabilometric platform; movement disorders; postural control.

Online: 7 August 2023 (12:03:46 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202107.0498.v1

Adaptive Fuzzy Fault-Tolerant Control against Time-Varying Faults via a New Sliding Mode Observer Method

Yi Zhang, Yingying Nie, Zhiyuan Dong, Liheng Chen

Subject: Computer Science And Mathematics, Algebra And Number Theory Keywords: Fault tolerant control; Adaptive fuzzy control; Time-varying actuator faults; Sliding mode control; Sliding mode observer

Online: 21 July 2021 (15:14:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.0231.v3

Locus of Control and Self‐Directed Learning Readiness of Nursing Students During the COVID‐19 Pandemic: A Cross‐Sectional Study from Saudi Arabia

Hanan A. A. ALKORASHY, Hanan A. ALOTAIBI

Subject: Public Health And Healthcare, Nursing Keywords: locus of control; self-directed learning readiness; nursing students; Saudi Arabia; undergraduates; COVID-19 pandemic

Online: 14 November 2023 (15:29:13 CET)

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Preprint ARTICLE | doi:10.20944/preprints202305.0524.v1

Impact of National Tobacco Control Policy on Rates of Hospital Admission for Pneumonia: When Compliance Matters

Marine Gambaryan*, Anna Kontsevaya, Oxana Drapkina

Subject: Public Health And Healthcare, Public, Environmental And Occupational Health Keywords: tobacco control; tobacco control legislation; tobacco control measures; tobacco control implementation scale; interrupted time series design; pneumonia hospitalisation rates; smoking-related hospitalisation rates

Online: 8 May 2023 (10:48:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.1774.v1

Enhancing Energy Power Quality in Low Voltage Networks integrating Renewable Energy Generation with High Intermittency: A Case of Study in a Microgrid located in a High-Altitude Equatorial City

Edisson Villa-Ávila, Paul Arévalo, Roque Aguado, Danny Ochoa-Correa, Vinicio Iñiguez-Morán, Francisco Jurado, Marcos Tostado-Véliz

Subject: Engineering, Electrical And Electronic Engineering Keywords: power smoothing; photovoltaic generation system; low pass filter; moving average; monitoring control; microgrid

Online: 25 May 2023 (08:45:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202312.1028.v1

An Optimal Switching Sequence Model Predictive Control Scheme for the 3L-NPC with Output LC Filter

Felipe Herrera, Andrés Mora, Roberto Cárdenas, Matías Díaz, Jose Rodriguez, Marco Rivera

Subject: Engineering, Electrical And Electronic Engineering Keywords: model predictive control; optimal switching sequence; multilevel converters; optimal control

Online: 14 December 2023 (03:03:31 CET)

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Preprint ARTICLE | doi:10.20944/preprints202305.2004.v1

Design of Intelligent Nonlinear H₂/H_∞ Robust Control Strategy of Diesel Generator Based CPSOGSA Optimization Algorithm

Yidong Zou, Boyi Xiao, Jing Qian, Zhihuai Xiao

Subject: Engineering, Energy And Fuel Technology Keywords: diesel generator; speed and excitation control; robust control; intelligent optimization

Online: 29 May 2023 (09:43:54 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0814.v1

Development of a Control Strategy in an Isokinetic Device for Physical Rehabilitation

Jorge Andres Penaloza-Gonzalez, Sergey Gonzalez-Mejia, Jose Isidro Garcia-Melo

Subject: Engineering, Bioengineering Keywords: Dynamic modeling; electric brake control; isokinetic; isokinetic control; dynamometry; rehabilitation.

Online: 11 May 2023 (07:27:31 CEST)

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Preprint REVIEW | doi:10.20944/preprints202010.0629.v1

A Comprehensive Review of the Coffee Leaf Miner Leucoptera Coffeella (Lepidoptera: Lyonetiidae), With Special Regard to Neotropical Impacts, Pest Management and Control

Juliana Dantas, Isabela Motta, Leonardo Vidal, João Bílio, Júlia M. Pupe, Adriano Veiga, Carlos H. S. Carvalho, Rogerio B. Lopes, Thales L. Rocha, Luciano P. Silva, José R. Pujol-Luz, Érika V.S. Albuquerque

Subject: Biology And Life Sciences, Anatomy And Physiology Keywords: resistance; cultivar; biopesticide; biological control; chemical control; life cycle; CLM

Online: 30 October 2020 (08:52:51 CET)

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Preprint ARTICLE | doi:10.20944/preprints201909.0172.v1

Fixed-time Stabilization for Uncertain Chained Systems with Sliding Mode and RBF Neural Network

Guo Pengfei, Liang Zhenying, Wang Xi, Jin Zengke

Subject: Computer Science And Mathematics, Applied Mathematics Keywords: Fixed-time stabilization; Sliding mode control; Adaptive control; Neural network

Online: 16 September 2019 (16:47:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0561.v1

Mathematical Modelling of Human African Trypanosomiasis Using Control Measures

Hamenyimana Emanuel Gervas, Nicholas Kwasi-Do Ohene Opoku, Shamsuddeen Ibrahim

Subject: Computer Science And Mathematics, Computational Mathematics Keywords: Human African Trypanosomiasis (HAT), Mathematical modelling, optimal control, Control measures

Online: 24 October 2018 (09:05:54 CEST)

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Preprint REVIEW | doi:10.20944/preprints201805.0221.v2

A Survey of Recent Trends in Multiobjective Optimal Control -- Surrogate Models, Feedback Control and Objective Reduction

Sebastian Peitz, Michael Dellnitz

Subject: Computer Science And Mathematics, Applied Mathematics Keywords: multiobjective optimization; optimal control; model order reduction; model predictive control

Online: 31 May 2018 (08:02:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202401.0614.v1

Trajectory Tracking Control for Quadrotors Using Adaptive Integral Terminal Sliding Mode under External Disturbances

Shipeng Jiao, Jun Wang, Yuchen Hua, Ye Zhuang, Xuetian Yu

Subject: Engineering, Aerospace Engineering Keywords: quadrotor UAV; trajectory tracking control; adaptive estimation; backstepping control; sliding mode control; dead zone technique; saturation function

Online: 8 January 2024 (11:28:05 CET)

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Preprint INTERESTING IMAGES | doi:10.20944/preprints202404.0815.v1

Magnetic Resonance Imagining Presentation of the Achilles Tendon Injuries – Examples from Our Practice

Stefan Stankov, Vladimir Živković, Dušan Stanković, Saša Bubanj, Šćepan Sinanović, Bojan Bjelica, Nikola Aksović, Emir Bilalović, Tatiana Dobrescu, Adina-Camelia Şlicaru

Subject: Medicine And Pharmacology, Orthopedics And Sports Medicine Keywords: Achilles Tendon Injuries, Screening Techniques, Interesting Images, athletes and non-athletes, case reports

Online: 12 April 2024 (04:41:58 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.0426.v1

Research on Specific Scenario Generation Methods for Autonomous Driving Simulation Tests

Ning Li, Lingshan Chen, Yongchao Huang

Subject: Engineering, Automotive Engineering Keywords: automated driving virtual simulation; subjective empowerment; objective empowerment; combined testing; test case generation

Online: 7 November 2023 (09:30:32 CET)

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Preprint ARTICLE | doi:10.20944/preprints202307.1345.v1

Dispel the Clouds and See the Sun: Influencing Factors and Multiple Path of User Retention Intention Formation

Hongjin Zhang, Longying Hu

Subject: Business, Economics And Management, Marketing Keywords: quality of experience; brand trust; brand attachment; user retention intention; case study; fsQCA

Online: 20 July 2023 (02:36:47 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints202306.1128.v1

Myeloid Sarcoma as an Unusual Presentation of Acute and Chronic Myeloid Leukemia: A Case Series

Ugo Giordano, Mateusz Sawicki, Justyna Pilch, Jakub Mizera, Artur Borkowski, Krzysztof Zduniak, Jarosław Dybko

Subject: Medicine And Pharmacology, Hematology Keywords: myeloid sarcoma; acute myeloid leukemia; chronic myeloid leukemia; chloroma; granulocytic sarcoma; case report

Online: 16 June 2023 (07:15:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0547.v1

Robust and Fragile Determinants of the Severity of Covid-19 in Developing and Developed Countries: A Comparative Analysis

Imad A. Moosa, Ibrahim N. Khatatbeh

Subject: Medicine And Pharmacology, Other Keywords: Covid-19; Infection Rate; Case Mortality Rate; Extreme Bounds Analysis; Cumulative Density Function

Online: 31 March 2023 (09:42:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202211.0196.v1

Opportunities for Comprehensive Medication Management (CMM) for Children with Special Healthcare Needs and Medical Complexity (CSHCN-CMC): The Methodology of a Prospective Case Series within a Collaborative Practice Agreement (CPA)

Jena Quinn, Heather Monk Bodenstab, Catherine Kuhn, Richard H Parrish II

Subject: Medicine And Pharmacology, Pediatrics, Perinatology And Child Health Keywords: CSHCN; CMC; care coordination; case series; collaboration; medical complexity; medication management; methodology; pediatrics

Online: 10 November 2022 (10:04:10 CET)

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Preprint CASE REPORT | doi:10.20944/preprints202102.0167.v1

Combined Aortic Valve Replacement and Coronary Bypass Grafting in Patient With Lipton’s R-III Type of Single Coronary Artery Anomaly

Milica Karadzic Kocica, Hristina Ugrinovic, Dejan Lazovic, Nemanja Karamarkovic, Milos Grujic, Borivoje Lukic, Oliver Radmili, Vladimir Cvetic, Mladen Kocica

Subject: Medicine And Pharmacology, Cardiac And Cardiovascular Systems Keywords: single coronary artery; aortic valve surgery, coronary artery bypass grafting surgery; case report

Online: 8 February 2021 (15:42:53 CET)

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Preprint CONCEPT PAPER | doi:10.20944/preprints202008.0648.v1

Downward Trend in the Indices of Death Rate in the COVID-19 Pandemic: Evaluating Alternative Hypotheses

Milind Watve, Sonali Shinde, Pratima Ranade

Subject: Biology And Life Sciences, Virology Keywords: Covid-19; case fatality rate; infection fatality rate; evolution of virulence; evolutionary medicine

Online: 30 August 2020 (10:26:58 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202005.0101.v1

Developing and Validating an Algorithm to Identify Incident Chronic Dialysis Patients Using Administrative Data

Dino Gibertoni, Claudio Voci, Marica Iommi, Benedetta D'Ercole, Marcora Mandreoli, Antonio Santoro, Elena Mancini

Subject: Computer Science And Mathematics, Information Systems Keywords: chronic dialysis; administrative data; hospital discharge records; ambulatory specialty visits; case definition; algorithm

Online: 6 May 2020 (15:26:06 CEST)

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Background: Administrative healthcare databases are widespread and are often standardized with regard to their content and data coding, thus they can be used also as data sources for surveillance and epidemiological research. Chronic dialysis requires patients to frequently access hospital and clinic services, causing a heavy burden to healthcare providers. This also means that these patients are routinely tracked on administrative databases, yet very few case definitions for their identification are currently available. The aim of this study was to develop two algorithms derived from administrative data for identifying incident chronic dialysis patients and test their validity compared to the reference standard of the regional dialysis registry. Methods: The algorithms are based on data retrieved from hospital discharge records (HDR) and ambulatory specialty visits (ASV) to identify incident chronic dialysis patients in an Italian region. Subjects are included if they have at least one event in the HDR or ASV databases based on the ICD9-CM dialysis-related diagnosis or procedure codes in the study period. Exclusion criteria comprise non-residents, prevalent cases, or patients undergoing temporary dialysis, and are evaluated only on ASV data by the first algorithm, on both ASV and HDR data by the second algorithm. We validated the algorithms against the Emilia-Romagna regional dialysis registry by searching for incident patients in 2014. Results: Algorithm 1 identified 680 patients and algorithm 2 identified 676 initiating dialysis in 2014, compared to 625 patients included in the regional dialysis registry. Sensitivity for the two algorithms was respectively 90.8% and 88.4%, positive predictive value 84.0% and 82.0%, and percentage agreement was 77.4% and 74.1%. Conclusions: These results suggest that administrative data have high sensitivity and positive predictive value for the identification of incident chronic dialysis patients. Algorithm 1, which showed the higher accuracy and has a simpler case definition, can be used in place of regional dialysis registries when they are not present or sufficiently developed in a region, or to improve the accuracy and timeliness of existing registries.

Preprint BRIEF REPORT | doi:10.20944/preprints202003.0260.v1

Case Analysis of Illegal Poaching on the Waterfowl under Highly Pathogenic Plague in China

Roller MaMing

Subject: Social Sciences, Law Keywords: illegal hunting; waterfowl; a case survey; poisoned; price chain; the west of China

Online: 16 March 2020 (09:43:35 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0467.v1

Experimental Nonlinear and Incremental Control Stabilization of a Tail-Sitter UAV with Hardware-in-the-Loop Validation

Alexandre Athayde, Alexandra Moutinho, José Raul Azinheira

Subject: Engineering, Control And Systems Engineering Keywords: tail-sitter; unmanned aerial vehicles (UAV); vertical take-off and landing (VTOL); nonlinear control; incremental control; attitude control

Online: 8 February 2024 (07:34:37 CET)

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Preprint ARTICLE | doi:10.20944/preprints202310.1145.v1

Bilinear Interpolation of Three-Dimensional Gain-Scheduled Autopilots

Sung Mo Koo, Timothy Sands

Subject: Engineering, Aerospace Engineering Keywords: gain-scheduled autopilots; nonlinear control; bilinear interpolation; control and guidance; control gains; three-dimensional lookup table (3D-LUT)

Online: 18 October 2023 (11:37:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0446.v1

Summation Laws in Biological Systems

Hans V. Westerhoff

Subject: Biology And Life Sciences, Biology And Biotechnology Keywords: Control coefficients; Metabolic Control Analysis; Systems Biology; Genomics; Pharmacokinetic principles; systems biology and PBPK; time-dependent control analysis

Online: 27 March 2023 (05:04:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0307.v1

Deep Learning for Robust Adaptive Inverse Control of Nonlinear Dynamic Systems: Improved Settling Time with an Autoencoder

Nuha A. S. Alwan, Zahir M. Hussain

Subject: Engineering, Control And Systems Engineering Keywords: deep neural network; deep learning controller; nonlinear plant; adaptive inverse control; robust control; autoencoder; computational complexity; sensor control

Online: 20 July 2022 (13:44:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202109.0526.v1

Monitoring the Nonconforming Fraction with a Dynamic Scheme When Sample Sizes are Time-varying

Víctor Hugo Morales, Carlos Arturo Panza, Javier Blanco

Subject: Computer Science And Mathematics, Probability And Statistics Keywords: Average run length; binomial distribution; control charts; EWMAG control chart; nonconforming fraction; p control chart; Phase II; SPC

Online: 30 September 2021 (15:30:52 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202201.0467.v1

Treatise On Analytic Optimal Spacecraft Guidance And Control

Timothy Sands

Subject: Engineering, Control And Systems Engineering Keywords: autonomy; optimal; spacecraft; navigation guidance; attitude control; inertial sensors; star trackers; linear quadratic regulator; time-optimal control; optimal open loop; proportional plus derivative control; real-time optimal control; switched real-time optimal control

Online: 31 January 2022 (13:40:49 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.0069.v1

An Attitude Adaptive Integral Sliding Mode Control Algorithm with Feedforward Compensation Disturbance Observer for Microsatellites to Track High-Speed Moving Targets

Xinyan Yang, Lei Li, Yurong Liao, Zhaoming Li

Subject: Engineering, Aerospace Engineering Keywords: Microsatellite; Attitude Control; Moving Target Tracking; Disturbance Observer; Sliding Mode Control

Online: 1 March 2024 (18:25:20 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0397.v1

Adaptive PI Controller for Speed Control of Electric Drives Based on Model Reference Adaptive Identification

Yuefei Zuo, Shushu Zhu, Yebing Cui, Chuang Liu, Xiaogang Lin

Subject: Engineering, Electrical And Electronic Engineering Keywords: Adaptive control; disturbance estimation; inertia identification; parameter identification; PI; speed control

Online: 7 February 2024 (10:51:00 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.1415.v1

EMG Model Calibration and Trajectory Tracking by Remote Rehabilitation Exoskeleton

Ubaldo Castro Jimenez, Edgar Martínez-García

Subject: Computer Science And Mathematics, Robotics Keywords: EMG-feedback; dynamic control; exoskeleton; tele-rehabilitation; trajectory-control; kinematic calibration

Online: 19 January 2024 (03:58:13 CET)

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Preprint ARTICLE | doi:10.20944/preprints202308.0665.v1

Economic Model of Ancillary Services in Real Time for Frequency Control

Kristian Balzer, Joaquin Lazo, David Watts

Subject: Engineering, Electrical And Electronic Engineering Keywords: ancillary services; secondary frequency control; tertiary frequency control; real time operation

Online: 8 August 2023 (13:34:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.1012.v1

Control of Wind Farm Power Output for Green Hydrogen Production without a Grid Connection

Adam Stock, Matthew Cole, Mathieu Kervyn, Fulin Fan, James Ferguson, Anup Nambiar, Benjamin Pepper, Michael Smailes, David Campos-Gaona

Subject: Engineering, Energy And Fuel Technology Keywords: wind farm control; green hydrogen; electrolysis; battery lifetime; wind turbine control

Online: 27 April 2023 (03:24:59 CEST)

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Green hydrogen is likely to play an important role in meeting the net zero targets of countries around the globe. Hence, producing green hydrogen cheaply and effectively is an important area of research. One potential option for green hydrogen production is to run electrolysers directly from offshore wind turbines, with no grid connection and hence no expensive cabling to shore. The removal of the grid presents an unusual integration challenge. The variable nature of wind turbines and farms results in a power output that can fluctuate more quickly than the electrolyser’s ability to respond without significantly stressing the electrolyser. Thus, the use of a battery, with the wind farm, becomes essential to even out some of the power variations that the electrolyser cannot deal with. In this work, a proof of concept of a wind farm control methodology designed to reduce variability in wind farm active power output is presented. Smoothing the power supplied by the wind farm to the battery reduces the size and number of battery charge cycles and helps to increase battery lifetime. Considering off-grid wind farms which exclusively power an electrolyser, this work quantifies the impact of the wind farm control method on battery lifetime for wind farms of 1, 4, 9 and 16 wind turbines. This is achieved using suitable wind farm, battery and electrolyser models. As an example, for the largest wind farm studied, consisting of 16 x 5 MW wind turbines, batteries with a lifetime of 15 years have approximately a 30 % reduction in required capacity (reduced from 14 MWh to 10 MWh) compared to operating without wind farm control. It is found that reducing the variability of the active power output of wind farms through the wind farm control methodology presented can have a significant impact on battery degradation and hence on battery lifetime. Hence, wind farm control can reduce the required battery capacity for a given lifetime or it can increase the lifetime of a given battery capacity. The work presented shows that wind farm control could play a critical role in reducing the levelised cost of green hydrogen produced from wind farms with no grid connection and paves the way for the design and testing of a full implementation of the wind farm control.

Preprint REVIEW | doi:10.20944/preprints201607.0012.v1

Analysis of Access Control Methods in Cloud Computing

Madhura Mulimani, Rashmi Rachh

Subject: Computer Science And Mathematics, Information Systems Keywords: role-based access control; attribute-based access control; attribute-based encryption

Online: 8 July 2016 (10:12:21 CEST)

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