1. The efficiency of manual editing of high-density surface electromyogram decomposition depends on the recorded muscle and contraction level but less on the operator’s experienceNina Murks, Jakob Škarabot, Matej Kramberger, Matjaž Divjak, Gašper Sedej, Tamara Valenčič, Christopher D. Connelly, Haydn Thomason, Aleš Holobar, 2025, izvirni znanstveni članek Opis: We investigated the agreement and accuracy of manual editing of the high-density electromyogram (hdEMG) decomposition results by seven human operators with various experience levels. All operators edited the same automatically decomposed experimental hdEMG from the first dorsal interosseous (FDI), tibialis anterior (TA), vastus lateralis (VL), and biceps brachii (BB) muscles, and synthetic hdEMG from soleus (SO) and BB muscles at 10%, 30%, 50% and 70% of maximum voluntary contraction. On average, operators kept 13.7 ± 7.4 motor units (MUs) after editing and demonstrated relatively large disagreement in the calculated MU pulse trains (normalized root mean square difference) but relatively high agreement in the identified MU discharges. Inter-operator agreement positively correlated with the initial MU Pulse-to-Noise Ratio used as a quality measure of automatic MU identification, and negatively correlated with the muscle contraction level. Operators agreed more on the results of the simulated than experimental hdEMG. Among the experimental muscles tested, the greatest agreement was demonstrated for VL and the lowest for BB. We obtained similar results when comparing editing to the results of the most experienced operator and to ground truth in simulated cases: the greatest precision and sensitivity were demonstrated for VL, and the lowest for BB. The level of the operator’s experience had a significant impact on the editing of synthetic hdEMG and the detection of the first MU discharge, but not on the rate of agreement or editing time of experimental hdEMG.
Ključne besede: hdEMG, manual editing, decomposition results, human operators, motor unit, človeški operaterji
Objavljeno v DKUM: 14.10.2025; Ogledov: 0; Prenosov: 4
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2. Vine canopy reconstruction and assessment with terrestrial lidar and aerial imagingIgor Petrović, Matej Sečnik, Marko Hočevar, Peter Berk, 2022, izvirni znanstveni članek Opis: For successful dosing of plant protection products, the characteristics of the vine canopies should be known, based on which the spray amount should be dosed. In the field experiment, we compared two optical experimental methods, terrestrial lidar and aerial photogrammetry, with manual defoliation of some selected vines. Like those of other authors, our results show that both terrestrial lidar and aerial photogrammetry were able to represent the canopy well with correlation coefficients around 0.9 between the measured variables and the number of leaves. We found that in the case of aerial photogrammetry, significantly more points were found in the point cloud, but this depended on the choice of the ground sampling distance. Our results show that in the case of aerial UAS photogrammetry, subdividing the vine canopy segments to 5 × 5 cm gives the best representation of the volume of vine canopies.
Ključne besede: precision agriculture, remote sensing, 3D point clouds, vineyard, canopy reconstruction, terrestrial lidar, aerial photogrammetry, manual defoliation
Objavljeno v DKUM: 15.07.2024; Ogledov: 123; Prenosov: 11
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3. Bi-objective assignment model for lean order picking in a warehouseBrigita Gajšek, Hrvoje Cajner, Tihomir Opetuk, Goran Đukić, Marcin Butlewski, 2022, izvirni znanstveni članek Opis: With the introduction of Lean Warehousing, we are committed to using lean principles for more efficient warehousing operations, which are performed with quality and safety. Manual order picking, on which the paper is focused, is currently considered the most unfriendly to humans because, in the long run, it contributes to the appearance of musculoskeletal disorders. We record not only the increase in the average age of employees in warehouses but also in the number and duration of sick leave due to back and muscle pain. This paper explores the possibility of productive work while preventing order pickers from Work-Related Musculoskeletal Disorders. Using a laboratory experiment, we determine retrieval times for units with different characteristics and study required postures by guidelines of Revised NIOSH Lifting Equation. The final goal is to create a bi-objective assignment model.
Ključne besede: warehousing, order picking, ergonomics, intralogistics, lean logistics, manual order picking, productivity, revised NIOSH lifting equation, warehousing, work-related musculoskeletal disorders
Objavljeno v DKUM: 13.06.2024; Ogledov: 105; Prenosov: 9
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4. Dimenzioniranje krožnih križiščBoštjan Celan, 2012, delo diplomskega projekta/projektno delo Opis: Projektna naloga z naslovom Dimenzioniranje krožnih križišč ne opisuje splošnih dognanj, temveč se osredotoča na eno izmed metod za dimenzioniranje krožnih križišč.
Skozi prebiranje »izdelka« se bralec najprej sreča s splošnimi dejstvi o dimenzioniranju krožnih križiščih. V nadaljevanju pa se tema zoži in se osredotoči na samo metodo za dimenzioniranje krožnih križišč, imenovano Highway capacity manual (HCM).
Zaradi več desetletnega obstoja te metode in večih izdaj priročnikov, v katerih je zapisana ta metoda, sta v tej projektni nalogi opisani dve izmed njih, z namenom ugotoviti izboljšave in novosti. Opisana je metoda iz izdaje priročnika iz leta 2000 (HCM 2000) ter iz zadnje izdaje priročnika iz leta 2010 (HCM 2010), in zajema splošne informacije in pa vse potrebne enačbe, ki so nujno potrebne za izračun posameznih parametrov.
Ob koncu teoretičnega dela je primerjalna tabela, v kateri se primerja metoda iz obeh izdaj priročnika HCM. Vsa teoretična dognanja in spoznanja pa so podkrepljena s praktičnim primerom.
Ključne besede: Krožna križišča, dimenzioniranje, priročnik Highway capacity manual (HCM).
Objavljeno v DKUM: 26.09.2012; Ogledov: 2636; Prenosov: 250
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5. Useful measures in the field of time and dimensional rationalisation of manual training lessonsSamo Fošnarič, Jurij Planinšec, 2010, izvirni znanstveni članek Opis: Schoolwork, especially lessons in manual skills is often associated with various ergonomics stresses. These stresses are the result not only of school obligations but also of the physical working environment and inadequate lesson planning. Much can be done in this field if certain approaches are taken into consideration at the work planning stage. Thus we can use certain analytical methods, such as the Method of Temporary Observations (Multi-Moment Method) and OWAS (a method for the evaluation of postural load during work), when positioning stressful lesson factors. This can be done in arelatively simple way in the field of time rationalisation as well as in the field of dimensional work adjustment to pupils. Research results in this papershow that by using a planned directed approach in this field, it is possible to achieve, a higher level of efficiency with normal levels of fatigue.
Ključne besede: dimensional rationalisation, manual skills lessons, pupils, technology and design education, time rationalisation
Objavljeno v DKUM: 07.06.2012; Ogledov: 1707; Prenosov: 124
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6. ORGLE V DEKANIJAH BRASLOVČE IN ŠALEŠKA DOLINAAnja Jezernik, 2009, diplomsko delo Opis: Cilj diplomskega dela z naslovom Orgle v dekanijah Braslovče in Šaleška dolina je bil raziskati zgodovinski razvoj orgel ter narediti popis orgel v dekanijah Braslovče ter Šaleška dolina. V delu so na kratko opisane cerkve posameznih župnij, temu pa sledi opis orgel, ki se nahajajo v njih. Za diplomsko delo sem uporabila vire s terena, kjer sem si vse orgle ogledala, jih preizkusila (kjer služijo svojemu namenu), fotografirala ter prebrala in uporabila župnijske kronike, vire in ostalo literaturo, kjer sem našla zapise o posameznih orglah. Fotografije orgel so v prilogi diplomskega dela.
Ključne besede: Orgle, dekanija braslovče, dekanija Šaleška dolina, župnija, podružnica, cerkev, manual, pedal, register, traktura.
Objavljeno v DKUM: 17.11.2009; Ogledov: 2736; Prenosov: 372
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