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50 Results Found

  • Article
  • Open Access
4 Citations
3,513 Views
20 Pages

29 August 2022

The angle-retaining color space (ARC) and the corresponding chromaticity diagram encode information following a cylindrical color model. Their main property is that angular distances in RGB are mapped into Euclidean distances in the ARC chromatic com...

  • Article
  • Open Access
3 Citations
1,859 Views
14 Pages

12 August 2023

Femtosecond laser-induced fluorescence (FLIF) and femtosecond laser-induced optical breakdown spectroscopy (FIBS) are important tools for remote diagnostics of atmospheric aerosols using LiDAR (Light Identification Detection and Ranging) technology....

  • Article
  • Open Access
8 Citations
2,946 Views
10 Pages

12 September 2022

With the advancement of underwater communication technology, the traditional modulation dimension has been introduced, developed and utilized. In addition, orbital angular momentum (OAM) is utilized as the modulation dimension for optical underwater...

  • Article
  • Open Access
2 Citations
1,550 Views
12 Pages

8 April 2024

The spectral and spatial characteristics of Acousto-Optic Tunable Filters (AOTFs), such as a tuning curve, spectral resolution, angular aperture, and diffraction efficiency, are determined by the device’s acousto-optic crystal configuration and...

  • Article
  • Open Access
10 Citations
5,413 Views
20 Pages

15 November 2018

Spiral galaxies are spinning, internally densified objects. The Virial Theorem explains galactic rotation curves via its linkage of the rotation rate to the gravitational self-potential (Ug) and the moment of inertia of oblate spheroids. We devise a...

  • Article
  • Open Access
10 Citations
4,626 Views
12 Pages

Angle-Angle Diagrams in the Assessment of Locomotion in Persons with Multiple Sclerosis: A Preliminary Study

  • Riccardo Di Giminiani,
  • Davide Di Lorenzo,
  • Stefano La Greca,
  • Luca Russo,
  • Francesco Masedu,
  • Rocco Totaro and
  • Elvira Padua

18 July 2022

Gait analysis is clinically relevant in persons with multiple sclerosis (PwMS) and consists of several joint angular displacement–time relationships and spatiotemporal parameters. However, it lacks representation by means of diagrams in which k...

  • Article
  • Open Access
1,892 Views
13 Pages

Estimation of the Induced Incidence of a High Reaction Axial Turbine Bucket

  • Marek Klimko,
  • Pavel Žitek,
  • Daniel Duda and
  • Bartolomej Rudas

3 September 2022

This paper describes the effect of the incidence angle of the bucket on the performance of the axial turbine stage. The off-design operating conditions of the turbine stage result in a change in the velocity diagrams. This results in a positive or ne...

  • Article
  • Open Access
3 Citations
4,327 Views
11 Pages

5 December 2021

Exercise is good for health, quality of life, and maintenance of human muscles. Dumbbells are popular indoor exercise equipment with several benefits such as low cost, high flexibility in space and time, easy operation, and suitability for people of...

  • Article
  • Open Access
2 Citations
2,307 Views
10 Pages

Angular Spectrum of Acoustic Pulses at Long Ranges

  • Denis V. Makarov and
  • Leonid E. Kon’kov

Long-range propagation of sound pulses in the deep ocean is considered. A new method for the estimation of the pulse angular spectrum is presented. The method is based on the Husimi transform of a wave field and can be realized with a short vertical...

  • Article
  • Open Access
9 Citations
3,380 Views
21 Pages

26 February 2023

Electromagnetic formation flight uses the electromagnetic interaction between satellites to provide maneuver control for formation satellites, with the advantages of no propellant consumption, long life, and high flexibility. However, high-precision...

  • Article
  • Open Access
755 Views
16 Pages

A New Robust Algorithm for Fault-Plane Parameters Identification: The 2009 L’Aquila (Central Italy) Seismic Sequence Case

  • Annarita Mangiacapra,
  • Zaccaria Petrillo,
  • Sergio Scippacercola,
  • Luisa Valoroso,
  • Rosa Nappi,
  • Giuliana Alessio and
  • Simona Tripaldi

17 April 2025

The study of the hypocenter distribution of seismic events related to fault structures is a crucial topic since it is linked to the geological features and to the dynamics of an investigated area. The hypocenter spatial distribution of earthquakes is...

  • Article
  • Open Access
2 Citations
2,140 Views
15 Pages

25 May 2023

In this paper, a new modified social force model is proposed to simulate the single-file pedestrian flow at high densities. Since the pedestrians could only follow the preceding person in the single-file flow, the way in which the pedestrian chooses...

  • Article
  • Open Access
5,945 Views
17 Pages

PSPICE Hybrid Modeling and Simulation of Capacitive Micro-Gyroscopes

  • Yan Su,
  • Xin Tong,
  • Nan Liu,
  • Guowei Han,
  • Chaowei Si,
  • Jin Ning,
  • Zhaofeng Li and
  • Fuhua Yang

28 March 2018

With an aim to reduce the cost of prototype development, this paper establishes a PSPICE hybrid model for the simulation of capacitive microelectromechanical systems (MEMS) gyroscopes. This is achieved by modeling gyroscopes in different modules, the...

  • Article
  • Open Access
11 Citations
6,657 Views
14 Pages

26 July 2023

The output active power of a grid-connected inverter controlled by a traditional virtual synchronous generator (VSG) has the problems of oscillation and steady-state errors. A VSG control strategy based on improved damping and angular frequency devia...

  • Article
  • Open Access
11 Citations
2,873 Views
18 Pages

30 January 2021

The analytical dependences for determining the overlap area of V-shaped grooves of partially regular microrelief shifted by an angular pitch of 0.5° are established. The V-shaped grooves are formed on the end surface of the rotary body by vibration....

  • Article
  • Open Access
4 Citations
696 Views
22 Pages

9 July 2025

In this study, we investigated the electrochemical corrosion behavior and mechanisms of FeCrNi/WC alloys with varying contents of CTC-S (spherical WC) and CTC-A (angular WC) in a 3.5 wt.% NaCl solution, addressing the corrosion resistance requirement...

  • Article
  • Open Access
4 Citations
3,167 Views
37 Pages

Power Flow in Coupled Three-Row Series-Parallel Planetary Gear System, Part I: Without Power Losses

  • Józef Drewniak,
  • Tomasz Kądziołka,
  • Jacek Rysiński and
  • Konrad Stańco

30 October 2023

So far it is believed that, for every series-parallel planetary gear system (PGS), as a coupled gear, a very harmful phenomenon of power circulation must occur in at least one of its closed circuits. In this paper (Part I) and in the next two (Part I...

  • Article
  • Open Access
1,910 Views
30 Pages

22 July 2025

A general algorithm to determine the coupler link geometric loci, such as centrodes, inflection and return circles, as well as circling-point and centering-point curves, is formulated to analyze any type of four-bar linkages with the main target to f...

  • Article
  • Open Access
6 Citations
2,197 Views
33 Pages

12 April 2022

Within this work, an advanced control algorithm was proposed to eliminate the non-linear vibrations of the rotor electro-magnetic suspension system. The suggested control algorithm is known as the Adaptive Linear Integral Positive Position Feedback c...

  • Article
  • Open Access
1 Citations
1,962 Views
12 Pages

Evaluation of Sputtering Processes in Strontium Iridate Thin Films

  • Víctor Fuentes,
  • Lluis Balcells,
  • Zorica Konstantinović,
  • Benjamín Martínez and
  • Alberto Pomar

23 January 2024

The growth of epitaxial thin films from the Ruddlesden–Popper series of strontium iridates by magnetron sputtering is analyzed. It was found that, even using a non-stoichiometric target, the films formed under various conditions were consistent...

  • Article
  • Open Access
2,847 Views
18 Pages

A Brown Dwarf Companion to the Nova-like Variable RW Tri

  • Zhibin Dai,
  • Shengbang Qian and
  • Indika Medagangoda

5 November 2021

The orbital period of Nova-like variable RW Tri is expected to experience a long-term evolution due to a stable mass transfer from the red dwarf to the white dwarf. By adding 297 new eclipse timings obtained from our own observations and a cross-iden...

  • Article
  • Open Access
4 Citations
2,513 Views
16 Pages

23 April 2023

The fragmentation dynamics of the CO2q+ (q = 2, 3) molecular ions formed under the impact of 1 MeV protons is studied using a recoil ion momentum spectrometer equipped with a multi-hit time- and position-sensitive detector. Both two-body and three-bo...

  • Article
  • Open Access
4 Citations
2,986 Views
16 Pages

Influence of Two-Frequency Radiation Intensity Fluctuations on the Output Signal of a Vortex Optical Fiber Forming OAM Address in Polyharmonic Sensor Technology

  • Irina Vinogradova,
  • Azat Gizatulin,
  • Ivan Meshkov,
  • Valery Bagmanov,
  • Oleg Morozov,
  • Ildaris Gabdulkhakov,
  • Sofia Ganchevskaya,
  • Nikolay Kazanskiy and
  • Albert Sultanov

25 August 2021

A schematic diagram of a RoF radio-optic system with vortex signals is presented, in which the radio frequency is determined by the difference between the wavelengths of two lasers. It is assumed that the generation of a vortex signal can be performe...

  • Article
  • Open Access
1 Citations
2,752 Views
19 Pages

Discrete Dynamics of Balls in Cageless Ball Bearings

  • Yanling Zhao,
  • Gang Zhou and
  • Qiyu Wang

25 October 2022

Cageless ball bearings are often preferred as a back-up bearing for active magnetic bearings to support a falling rotor, but the contact between the balls of the cageless ball bearing may lead to the deterioration of the bearing performance and affec...

  • Article
  • Open Access
1 Citations
1,108 Views
14 Pages

13 May 2025

We designed lens systems for a smart-pixel-based optical convolutional neural network (SPOCNN) using optical software to analyze image spread and estimate alignment tolerance for various kernel sizes. The design, based on a three-element lens, was re...

  • Article
  • Open Access
9 Citations
2,565 Views
13 Pages

19 January 2024

Cosmological parameters are constrained by a wide variety of observations. We examine the concordance diagram for modern measurements of the Hubble constant, the shape parameter from the large-scale structure, the cluster baryon fraction, and the age...

  • Article
  • Open Access
2 Citations
2,646 Views
21 Pages

29 September 2024

The origin of Oligocene sediments in the Bengal Basin and associated tectonic setting remain poorly understood. This study investigates the framework mineralogy and major element geochemistry of the Barail Group sandstones from the Sylhet Trough with...

  • Article
  • Open Access
4 Citations
3,500 Views
11 Pages

On the Modeling of Algol-Type Binaries

  • Walter van Rensbergen and
  • Jean-Pierre de Greve

In earlier papers, we presented a binary evolutionary code for the purpose of reproducing the orbital parameters, masses, radii, and location in the Hertzsprung Russell diagram (abbreviated as HRD) of well-observed Algol systems. In subsequent versio...

  • Article
  • Open Access
38 Citations
16,418 Views
25 Pages

9-DOF IMU-Based Attitude and Heading Estimation Using an Extended Kalman Filter with Bias Consideration

  • Sajjad Boorghan Farahan,
  • José J. M. Machado,
  • Fernando Gomes de Almeida and
  • João Manuel R. S. Tavares

29 April 2022

The attitude and heading reference system (AHRS) is an important concept in the area of navigation, image stabilization, and object detection and tracking. Many studies and works have been conducted in this regard to estimate the accurate orientation...

  • Article
  • Open Access
23 Citations
5,416 Views
13 Pages

Kinematics Adaptation and Inter-Limb Symmetry during Gait in Obese Adults

  • Massimiliano Pau,
  • Paolo Capodaglio,
  • Bruno Leban,
  • Micaela Porta,
  • Manuela Galli and
  • Veronica Cimolin

6 September 2021

The main purpose of this study is to characterize lower limb joint kinematics during gait in obese individuals by analyzing inter-limb symmetry and angular trends of lower limb joints during walking. To this purpose, 26 obese individuals (mean age 28...

  • Article
  • Open Access
4 Citations
4,491 Views
17 Pages

25 October 2021

This study investigates the nonlinear dynamic response behavior of a rotating ring that forms an essential element of MEMS (Micro Electro Mechanical Systems) ring-based vibratory gyroscopes that utilize oscillatory nonlinear electrostatic forces. For...

  • Article
  • Open Access
1,893 Views
13 Pages

1 April 2024

The structure of skyrmion and spiral solutions, investigated within the phenomenological Dzyaloshinskii model of chiral magnets near the ordering temperatures, is characterized by the strong interplay between longitudinal and angular order parameters...

  • Article
  • Open Access
5 Citations
6,429 Views
18 Pages

Design, Modeling, and Simulation of a Wing Sail Land Yacht

  • Vítor Tinoco,
  • Benedita Malheiro and
  • Manuel F. Silva

19 March 2021

Autonomous land yachts can play a major role in the context of environmental monitoring, namely, in open, flat, windy regions, such as iced planes or sandy shorelines. This work addresses the design, modeling, and simulation of a land yacht probe equ...

  • Technical Note
  • Open Access
18 Citations
5,161 Views
14 Pages

6 February 2021

This study analyzed the lateral overturning and backward rollover characteristics of a multi-purpose agricultural machine recently developed in South Korea. Free body diagrams for theoretical analysis and a three-dimensional model for dynamic simulat...

  • Feature Paper
  • Article
  • Open Access
3 Citations
2,438 Views
33 Pages

Geochemical and Mineralogical Insights into Organic Matter Preservation in the Gondwana and Post-Gondwana Shale of the Lesser Himalayas, Nepal

  • Kumar Khadka,
  • Shuxun Sang,
  • Sijie Han,
  • Junjie He,
  • Upendra Baral,
  • Saunak Bhandari and
  • Debashish Mondal

9 January 2025

The depositional environments, weathering and provenance, organic matter enrichment, and preservation in the Gondwana and post-Gondwana units of the Lesser Himalayas, Nepal, are studied through geochemical and mineralogical analyses using petrography...

  • Project Report
  • Open Access
1 Citations
1,842 Views
22 Pages

Measuring and Energizing Sensor System for Digital Signal Monitoring of an Academic–Experimental CubeSat for Wireless Telemetry Purposes

  • Jose Pablo Garcia-Fernandez,
  • Leobardo Hernandez-Gonzalez,
  • Jazmin Ramirez-Hernandez,
  • Pedro Guevara-Lopez,
  • Oswaldo Ulises Juarez-Sandoval and
  • Guillermo Avalos-Arzate

7 October 2023

Space technology for small satellites has made significant progress in the academic and industrial fields, and an alternative focused on educational institutions is the CubeSat standard, created to promote various scientific projects of space explora...

  • Article
  • Open Access
926 Views
13 Pages

Concentric Intensity-Based Adjacent OAM Mode Separation for High-Efficiency Free-Space Optical Spatial Multiplexing

  • Ji-Yung Lee,
  • Jiyeon Baek,
  • Junsu Kim,
  • Sujan Rajbhandari,
  • Seung Ryong Park and
  • Hyunchae Chun

13 August 2025

The rapid growth of data traffic in modern communication networks has led to the development of advanced high-capacity multiplexing methods. Orbital angular momentum (OAM)–based mode division multiplexing (MDM) offers a promising scheme by util...

  • Article
  • Open Access
11 Citations
4,881 Views
10 Pages

25 May 2020

Hydropower plays an essential role in maintaining energy flexibility. Modern designs focus on sustainability and robustness using different numerical tools. Automatic optimization of the turbines is widely used, including low, mini and micro head tur...

  • Article
  • Open Access
19 Citations
6,044 Views
14 Pages

Kinematic Analysis of Lower Limb Joint Asymmetry During Gait in People with Multiple Sclerosis

  • Massimiliano Pau,
  • Bruno Leban,
  • Michela Deidda,
  • Federica Putzolu,
  • Micaela Porta,
  • Giancarlo Coghe and
  • Eleonora Cocco

3 April 2021

The majority of people with Multiple Sclerosis (pwMS), report lower limb motor dysfunctions, which may relevantly affect postural control, gait and a wide range of activities of daily living. While it is quite common to observe a different impact of...

  • Feature Paper
  • Article
  • Open Access
45 Citations
4,412 Views
19 Pages

Capacity Enhancement for Free Space Optics Transmission System Using Orbital Angular Momentum Optical Code Division Multiple Access in 5G and beyond Networks

  • Somia A. Abd El-Mottaleb,
  • Mehtab Singh,
  • Abdellah Chehri,
  • Hassan Yousif Ahmed,
  • Medien Zeghid and
  • Akhtar Nawaz Khan

27 September 2022

This paper introduces a novel free space optics (FSO) communication system for future-generation high-speed networks. The proposed system integrates orbital angular momentum (OAM) modes with an optical code division multiple access (OCDMA) technique....

  • Article
  • Open Access
5 Citations
2,360 Views
15 Pages

5 February 2023

Intelligent lower-limb prosthesis appears in the public view due to its attractive and potential functions, which can help amputees restore mobility and return to normal life. To realize the natural transition of locomotion modes, locomotion mode cla...

  • Article
  • Open Access
711 Views
24 Pages

10 November 2025

The Late Holocene flood history of the Cauvery River floodplain in the Poompuhar region was reconstructed using a multiproxy sedimentological approach applied to three trench cores. Lithostratigraphy, loss on ignition (LOI), magnetic susceptibility (...

  • Article
  • Open Access
1,396 Views
15 Pages

ALMA Observations of G333.6-0.2: Molecular and Ionized Gas Environment

  • Aruzhan Omar,
  • Aidana Abdirakhman,
  • Nazgul Alimgazinova,
  • Meiramgul Kyzgarina,
  • Aisha Naurzbayeva,
  • Zhomartkali Islyam,
  • Kunduz Turekhanova,
  • Aizat Demessinova and
  • Arailym Manapbayeva

We present high-angular resolution observations, conducted with the Atacama Large Millimeter/Submillimeter Array (ALMA) in Band 6, of high-excitation molecular lines of CH3CN, CH3OH, and the H29α radio recombination line, towards the G333.6-0.2...

  • Article
  • Open Access
25 Citations
4,267 Views
11 Pages

A Study on Lower Limb Asymmetries in Parkinson’s Disease during Gait Assessed through Kinematic-Derived Parameters

  • Federico Arippa,
  • Bruno Leban,
  • Marco Monticone,
  • Giovanni Cossu,
  • Carlo Casula and
  • Massimiliano Pau

Unilaterality of motor symptoms is a distinctive feature of Parkinson’s Disease (PD) and represents an important co-factor involved in motor deficits and limitations of functional abilities including postural instability and asymmetrical gait....

  • Article
  • Open Access
1 Citations
3,663 Views
16 Pages

WNMS: A New Basaltic Simulant of Mars Regolith

  • Abdur Rahim,
  • Umair Majeed,
  • Muhammad Irfan Zubair and
  • Muhammad Shahzad

6 September 2023

The use of planetary regolith can be explored via the utilization of simulants. The existing Martian simulants have differences due to varying source materials and design parameters. Additional simulants are needed because the few available simulants...

  • Article
  • Open Access
17 Citations
2,094 Views
21 Pages

Electric motors play a crucial role in ship systems. Detecting potential issues with electric motors is a critical aspect of ship fault diagnosis. Fault diagnosis in motors is often challenging due to limited and noisy vibration signals. Existing dee...

  • Article
  • Open Access
3 Citations
2,690 Views
20 Pages

Exploring the Effects of Cramped-Impact-Type Mechanical Action on Active Pharmaceutical Ingredient (Levofloxacin)—Prospects for Pharmaceutical Applications

  • Elena Uspenskaya,
  • Anastasia Simutina,
  • Ekaterina Kuzmina,
  • Vasilisa Sukhanova,
  • Timur Garaev,
  • Tatiana Pleteneva,
  • Alena Koldina,
  • Ekaterina Kolyabina,
  • Gleb Petrov and
  • Anton Syroeshkin

9 June 2023

Mechanochemistry is one of the ten great discoveries of green chemistry methods for synthesizing new substances. A drug substance from the fluoroquinolone group was exposed to high-intensity mechanical impacts using a laboratory knife mill for 21 min...

  • Article
  • Open Access
12 Citations
4,411 Views
30 Pages

U–Pb Zircon Geochronological and Petrologic Constraints on the Post-Collisional Variscan Volcanism of the Tiddas-Souk Es-Sebt des Aït Ikko Basin (Western Meseta, Morocco)

  • Ismail Hadimi,
  • Nasrrddine Youbi,
  • Abdelhak Ait Lahna,
  • Mohamed Khalil Bensalah,
  • Oussama Moutbir,
  • João Mata,
  • Miguel Doblas,
  • Colombo Celso Gaeta Tassinari,
  • Laura Gaggero and
  • Moulay Ahmed Boumehdi
  • + 3 authors

7 October 2021

The NE–SW trending Tiddas Souk Es-Sebt des Ait Ikko (TSESDAI) basin, located at 110 km southeast of Rabat, in the region of Khmesset between the village of Tiddas and Souk Es-Sebt des Ait Ikko, is the third largest late Palaeozoic continental trough...

  • Article
  • Open Access
2 Citations
3,201 Views
19 Pages

23 February 2023

The formation of the East Kunlun Orogen (EKO) was related to the tectonic evolution of the Proto-Tethys and Paleo-Tethys Oceans. However, how the Paleo-Tethys Ocean transited from the Proto-Tethys Ocean, and whether the Paleo-Tethys Ocean subducted n...