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Abstract: The purpose of this article is to present the use of a previously validated wearable sensor device, Armbeep, in a real-life application, to enhance a tennis player’s training by monitoring and analysis of the time, physiological, movement, and tennis-specific workload and recovery indicators, based on fused sensor data acquired by the wearable sensor—a miniature wearable sensor device, designed to be worn on a wrist, that can detect and record movement and biometric information, where the basic signal processing is performed directly on the device, while the more complex signal analysis is performed in the cloud. The inertial measurements and pulse-rate detection of the wearable device were validated previously, showing acceptability for monitoring workload and recovery during tennis practice and matches. This study is one of the first attempts to monitor the daily workload and recovery of tennis players under real conditions. Based on these data, we can instruct the coach and the player to adjust the daily workload. This optimizes the level of an athlete’s training load, increases the effectiveness of training, enables an individual approach, and reduces the possibility of overuse or injuries. This study is a practical example of the use of modern technology in the return of injured athletes to normal training and competition. This information will help tennis coaches and players to objectify their workloads during training and competitions, as this is usually only an intuitive assessment.
Keywords: tennis, training, data-based coaching, shot recognition, wearable device, workload, recovery
Published in DKUM: 31.03.2025; Views: 0; Downloads: 3
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Abstract: V magistrskem delu je obravnavano načrtovanje in implementacija sistema za avtomatsko testiranje tiskanih vezij na prototipih pred serijsko proizvodnjo. V nalogi so predstavljene ključne tehnologije in standardi, ki so pomembni za razvoj sistema. Strežniški del sistema je bil razvit s programskim jezikom Python in uporabo ogrodja FastAPI in Uvicorn. Odjemalni del sistema je prav tako razvit s programskim jezikom Python, vendar z uporabo okolja JupyterLab. Podatki in poročila se shranjujejo v oddaljeno podatkovno bazo MySQL. Sistem omogoča hitrejše izvajanje enakih testov v enakih pogojih, saj poročilo in priložena datoteka vsebujeta vse potrebne informacije za ponovno izvedbo testiranja. Cilj razvoja sistema je razbremenitev testerja pisanja poročila in s tem pospešitev izvajanja testov, pri čemer pa ne trpi kvaliteta izvajanja testa.
Keywords: programsko inženirstvo, RESTful spletne storitve, avtomatizacija, testiranje, poročilo
Published in DKUM: 04.03.2025; Views: 0; Downloads: 28
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Abstract: This article presents the results of dynamic measurements of 3-D multilevel cell (MLC) NAND flash memories in a mixed-field radiation facility CERN High-energy AcceleRator Mixed field/facility (CHARM), CERN. The results show that the behavior of devices is comparable to tests with specific high energy particles, such as high energy protons, heavy ions, and to TID tests. The observed TID and single-event effects (SEEs) in flash memories from the existing relevant work are also observed in mixed field, making the environment suitable for an accelerated system level test. As the CHARM hadron energy spectrum is comparable to the low Earth orbit (LEO) environment, the facility is appropriate as an accelerated test for space applications. Furthermore, the volumetric characteristics of the devices can be observed in this 3-D radiation facility. Additionally, bad bit (BB) spread was observed, and the necessary radiation induced errors in NAND devices are discussed.
Keywords: bit error rate, flkash memories, memory controller, mixed field facility, multilevel cell, MLC, radiation hardness, single-event upsets, SEUs, space applications, total ionizing dose
Published in DKUM: 03.02.2025; Views: 0; Downloads: 6
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Abstract: Two new surfactant sensors were developed by synthesizing Pt-doped acid-activated multiwalled carbon nanotubes (Pt@MWCNTs). Two different ionophores using Pt@MWCNTs, a new plasticizer, and (a) cationic surfactant 1,3-dihexadecyl-1H-benzo[d]imidazol-3-ium-DHBI (Pt@MWCNT-DHBI ionophore) and (b) anionic surfactant dodecylbenzenesulfonate-DBS (Pt@MWCNT-DBS ionophore) composites were successfully synthesized and characterized. Both surfactant sensors showed a response to anionic surfactants (dodecylsulfate (SDS) and DBS) and cationic surfactants (cetylpyridinium chloride (CPC) and hexadecyltrimethylammonium bromide (CTAB)). The Pt@MWCNT-DBS sensor showed lower sensitivity than expected with the sub-Nernstian response of ≈23 mV/decade of activity for CPC and CTAB and ≈33 mV/decade of activity for SDS and DBS. The Pt@MWCNTDHBI surfactant sensor had superior response properties, including a Nernstian response to SDS (59.1 mV/decade) and a near-Nernstian response to DBS (57.5 mV/decade), with linear response regions for both anionic surfactants down to ≈2 × 10−6 M. The Pt@MWCNT-DHBI was also useful in critical micellar concentration (CMC) detection. Common anions showed very low interferences with the sensor. The sensor was successfully employed for the potentiometric titration of a technical grade cationic surfactant with good recoveries. The content of cationic surfactants was measured in six samples of complex commercial detergents. The Pt@MWCNT-DHBI surfactant sensor showed good agreement with the ISE surfactant sensor and classical two-phase titration and could be used as an analytical tool in quality control
Keywords: potentiometric surfactant sensor, metal-doped MWCNT, surfactants, carbon nanocomposite, sensors
Published in DKUM: 23.08.2024; Views: 110; Downloads: 11
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Abstract: V magistrskem delu sta predstavljena delovanje in razvoj napetostno krmiljenih oscilatorjev na osnovnih frekvencah delovanja 50MHz, 100MHz in 1GHz. Kot resonator za 1GHz VCO je uporabljen SAW resonator, za 50MHz in 100MHz pa kremenčev resonator, ki resonira na osnovni frekvenci pri 50MHz VCO-ju in na tretjem overtonu pri 100MHz VCO. Uporabili smo računsko, simulacijsko in eksperimentalno metodo razvoja. Razviti VCO-ji so se izkazali kot elektronske komponente, ki jih lahko uporabimo v različnih aplikacijah ali pa za nadaljnji razvoj.
Keywords: napetostno krmiljeni oscilator, kremenčev resonator, SAW resonator, fazni šum
Published in DKUM: 13.10.2023; Views: 243; Downloads: 37
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