1. Interlaboratory study of automated sorption measurements in wood : method for correcting systematic errors with the commonly used 0.002% min[sup] -1 stop criterionSamuel L. Zelinka, Samuel V. Glass, Natalia Farkas, Emil Engelund Thybring, Michael Altgen, Lauri Rautkari, Simon F. Curling, Jinzhen Cao, Yujiao Wang, Tina Künniger, Matthew Schwarzkopf, 2025, izvirni znanstveni članek Opis: Many studies that use an automated sorption balance to determine a water vapor sorption isotherm for wood collect data until the moisture content change is less than or equal to 0.002% min−1 (20 µg g−1 min−1). This stop criterion has been claimed to give errors in equilibrium moisture content (EMC) predictions of less than 0.001 g g−1 but over the past 10 years, studies have shown that the actual errors can be greater than 0.01 g g−1 because the measurements are stopped well before equilibrium is reached. Despite the large errors associated with this stop criterion, it remains popular due to the speed at which isotherms can be measured. This paper utilizes data from a worldwide interlaboratory study on automated sorption balances to develop a correction method for estimating EMC of western larch (Larix occidentalis Nutt.) from the moisture content corresponding to the 20 µg g−1 min−1 criterion. The study uses data from 72 relative humidity absorption steps with hold times of 7–10 days from 21 different laboratories and eight different instrument models. EMC is defined based on the inherent mass stability of automated sorption balances determined in the first part of this interlaboratory study. On average the sorption process is less than 80% complete when the 20 µg g−1 min−1 criterion is reached, resulting in a mean absolute error (MAE) of 0.006 g g−1. The correction equation for estimating EMC reduces the MAE to 0.001 g g−1. The analysis presented in this paper, along with the correction equation, can be considered for certain use cases to reduce systematic errors and shorten measurement times.
Ključne besede: water vapor sorption, dynamic vapor sorption, sorption isotherms, equilibrium moisture content, interlaboratory study
Objavljeno v RUP: 14.11.2025; Ogledov: 204; Prenosov: 3
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2. Interlaboratory study of the quality of water vapor sorption data for wood from automated sorption balancesSamuel L. Zelinka, Samuel V. Glass, Natalia Farkas, Emil Engelund Thybring, Michael Altgen, Lauri Rautkari, Simon F. Curling, Jinzhen Cao, Yujiao Wang, Tina Künniger, Matthew Schwarzkopf, 2025, izvirni znanstveni članek Opis: Automated sorption balances are widely used for characterizing the interaction of water vapor with hygroscopic materials. This paper is part of an interlaboratory study investigating the stability and performance of automated sorption balances. A previous paper in this study investigated the mass, temperature, and relative humidity (RH) stability of automated sorp- tion balances by looking at the mass change of a non-hygroscopic sample over time. In this study, we examine the mass stability of wood samples held at constant RH for seven to ten days after a step change. The reason for the long hold times was to collect data to “operational equilibrium” where the change in mass is on the order of the inherent operational stability of the instrument. A total of 80 datasets were acquired from 21 laboratories covering absorption with final RH levels ranging from 10 to 95%. During these long hold times, several unusual behaviors were observed in the mass-vs-time curves. Deviations from expected sorption behavior were examined by fitting the data to an empirical sorption kinetics model and calculating the root mean square error (RMSE) between the observed and smoothed behavior. Samples that had a large RMSE relative to the median RMSE of the other datasets often had one of several types of errors: abrupt disturbances, diurnal oscillations, or long-term mass decline during an absorption step. In many cases, mass fluctuations were correlated with changes in the water reservoir temperature of the automated sorption balance. We discuss potential errors in sorption measurements on hygroscopic materials and suggest an acceptable level of RMSE for sorption data.
Ključne besede: water vapor sorption, dynamic vapor sorption, sorption isotherms, interlaboratory study
Objavljeno v RUP: 25.07.2025; Ogledov: 439; Prenosov: 2
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4. Bonsma, Paul; Paulusma, Daniël: Using contracted solution graphs for solving reconfiguration problems. (English summary) Acta Inform. 56 (2019), no. 7-8, 619-648.Clément Jean Dallard, 2021, recenzija, prikaz knjige, kritika Ključne besede: reconfiguration, dynamic programming, graph coloring
Objavljeno v RUP: 26.10.2021; Ogledov: 3331; Prenosov: 12
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5. Image registration in dynamic renal MRI-current status and prospectsFrank G. Zöllner, Amira Šerifović-Trbalić, Gordian Kabelitz, Marek Kociński, Andrzej Materka, Peter Rogelj, 2020, pregledni znanstveni članek Ključne besede: kidney disease, image registration, dynamic MRI, DCE-MRI, ASL
Objavljeno v RUP: 18.03.2020; Ogledov: 2337; Prenosov: 93
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6. Experimental and numerical studies of CFRP tube and steel spiral dual-confined concrete composite columns under axial impact loadingLiang Huang, Chang Gao, Libo Yan, Tao Yu, Bohumil Kasal, 2018, izvirni znanstveni članek Ključne besede: CFRP tube, spiral reinforcement, dual-confinement, axial impact resistance, cracking resistance, ductile failure, dynamic increase factor, finite element analysis
Objavljeno v RUP: 19.11.2018; Ogledov: 3210; Prenosov: 215
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7. Impact behavior of concrete columns confined by both GFRP tube and steel spiral reinforcementLiang Huang, Xiaoxun Sun, Libo Yan, Bohumil Kasal, 2017, izvirni znanstveni članek Ključne besede: GFRP tube, spiral reinforcement, confinement, impact loading, dynamic behavior, drop hammer
Objavljeno v RUP: 19.11.2018; Ogledov: 3350; Prenosov: 323
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8. Managing sustainable profitAleksander Janeš, Armand Faganel, 2015, objavljeni znanstveni prispevek na konferenci Ključne besede: management, odnosi, dolgoročna stabilnost, merjenje uspešnosti, učinkovitost, trajnostna rast, causal relations, error correction model, long term stability, performance measurement system, short term dynamic, strategy fulfilment, sustainable growth
Objavljeno v RUP: 03.04.2017; Ogledov: 7015; Prenosov: 96
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