1. Rheological behaviors of waste polyethylene modified asphalt binder : Statistical analysis of interlaboratory testing resultsDi Wang, Andrea Baliello, Gustavo Pinheiro, Lily D. Poulikakos, Marjan Tušar, Kamilla Vasconcelos, Muhammad Rafiq Kakar, Laurent Porot, Emiliano Pasquini, Gaspare Giancontieri, Chiara Riccardi, Marco Pasetto, Davide Lo Presti, Augusto Cannone Falchetto, 2023, original scientific article Abstract: This article investigated the effect of waste polyethylene (PE) on the modified asphalt binders’ rheological behavior from a statistical point of view. The interlaboratory testing results from the RILEM Technical Committee 279 Valorization of Waste and Secondary Materials for Roads Task Group 1 were used for this purpose. First, an unaged 70/100 penetration graded neat binder was selected as the reference material. Next, a single 5 % content of waste PE additives (PE-pellets and PE-shreds) was mixed with a 95 % neat binder to prepare two PE modified binders. Then, dynamic shear rheometer–based temperature-frequency sweep tests were performed over a wide range of temperatures and frequencies to evaluate the rheological properties of these three binders. Different rheological behaviors were observed in the isochronal plots at high temperatures. Based on a reproducibility precision requirement proposed for phase angle, 28°C was set as the transition temperature across the rheological behaviors. Next, according to the three rheological behaviors defined in a previous study by the authors, statistical analysis was introduced to identify sensitive rheological parameters and determine the thresholds. Results indicate that the phase angle measured above 28°C and 1.59 Hz can be used as a sensitive parameter to discriminate the three rheological behaviors of PE modified binders. The thresholds among different behaviors were also calculated as an example for phase angle measured at the highest common testing temperature of 70°C. Additional experimental evaluations on more types of PE modified binders, especially at intermediate and high temperatures, are recommended to better understand their influence on the rheological behavior of PE modified binders. Keywords: bitumen, polietilen, reologija, medlaboratorijska primerjava Published in DiRROS: 20.02.2024; Views: 133; Downloads: 60 Full text (1,19 MB) This document has many files! More... |
2. A sodium/potassium switch for G4-prone G/C-rich sequencesYu Luo, Martina Lenarčič Živković, Jiawei Wang, Jan Ryneš, Silvie Foldynová-Trantírková, Lukáš Trantírek, Daniela Verga, Jean-Louis Mergny, 2024, original scientific article Published in DiRROS: 16.01.2024; Views: 203; Downloads: 93 Full text (2,17 MB) This document has many files! More... |
3. |
4. Insight into tetramolecular DNA G-quadruplexes associated with ALS and FTLD : cation interactions and formation of higher-ordered structureMatja Zalar, Baifan Wang, Janez Plavec, Primož Šket, 2023, original scientific article Keywords: ALS, FTLD, DNA, c9orf7, NMR, quadruplex, cations Published in DiRROS: 06.09.2023; Views: 291; Downloads: 170 Full text (2,68 MB) This document has many files! More... |
5. Feasibility of remote blood pressure estimation via narrow-band multi-wavelength pulse transit timeGašper Slapničar, Wenjin Wang, Mitja Luštrek, 2023, original scientific article Abstract: Contact-free sensing gained much traction in the past decade. While remote monitoring of some parameters (heart rate) is approaching clinical levels of precision, others remain challenging (blood pressure). We investigated the feasibility of estimating blood pressure (BP) via pulse transit time (PTT) in a novel remote single-site manner, using a modified RGB camera. A narrow-band triple band-pass filter allowed us to measure the PTT between different skin layers, harvesting information from green and near-infrared wavelengths. The filter minimizes the inter-channel influence and band overlap, however some overlap remains within the filter bands. We further resolve this using a color-channel model and a novel channel-separation method. Using the proposed setup and algorithm, we obtained multi-wavelength (MW) PTTs in an experiment inducing BP changes to 9 subjects. The results showed good absolute Pearson’s correlation coefficient between both MW PTT and systolic BP (R = 0.61, p = 0.08) as well as diastolic BP (R = 0.54, p = 0.05), pointing to feasibility of the proposed novel remote MW BP estimation via PTT. This was further confirmed in a leave-one-subject-out experiment, where a simple Random Forest regression model achieved mean absolute errors of 3.59 and 2.63 mmHg for systolic and diastolic BP respectively.
Published in DiRROS: 27.07.2023; Views: 361; Downloads: 179 Full text (1,06 MB) This document has many files! More... |
6. Analysis of putative apoplastic effectors from the nematode, Globodera rostochiensis, and identification of an expansin-like protein that can induce and suppress host defensesBarbara Gerič Stare, Shawkat Ali, Maxime Magne, Shiyan Chen, Olivier Côte, Natasa Obradovic, Lubna Jamshaid, Xiaohong Wang, Guy Bélair, Peter Moffett, 2015, original scientific article Keywords: nematode, expansin-like protein, expansin, potato cyst nematode, potato pest, parasitic nematodes, plant celular function Published in DiRROS: 06.09.2022; Views: 477; Downloads: 208 Link to full text |
7. Influence of voltage and current on the arc shape in cable-type wire TIG-MIG hybrid weldingChao Zhang, Qingxian Hu, Xiaoli Wang, Zhuang Dong, Daozhong Du, 2022, original scientific article Keywords: tungsten inert gas welding, metal inert gas welding, cable-type wire, arc shape, voltage, current Published in DiRROS: 22.06.2022; Views: 449; Downloads: 117 Link to file |
8. Structural and elastic properties of AgNi[sub]10 alloy studied with ab-initio calculationsJide Liu, Xue Wang, Xiaoming Du, Ming Xie Xie, Jinguo Li, Shangqiang Zhao, Yizhou Zhou, Qiao Zhang, Jiheng Fang, 2022, original scientific article Keywords: AgNi[sub]10 alloy, ab initio calculations, elastic anisotropy, thermodynamic properties Published in DiRROS: 22.06.2022; Views: 554; Downloads: 140 Link to file |
9. Study of a modified melamine sponge and its lipophilic and hydrophobic propertiesYuan Ma, Tao Li, Fei Jiang, Sheng Ma, Xiaomeng Wu, Weijie Wang, Zhenfa Zi, Wenliang Chen, Ping Na, 2022, original scientific article Keywords: super hydrophobicity, oil-water separation, melamine sponge, oily pollutants Published in DiRROS: 22.06.2022; Views: 498; Downloads: 103 Link to file |
10. Effect of temperature on MgO activity in the CaO-SiO[sub]2-MgO-Al[sub]2O[sub]3 system measured by molten tinYongchun Guo, Fengman Shen, Haiyan Zheng, Shuo Wang, Xin Jiang, Qiangjian Gao, 2022, original scientific article Keywords: blast furnace, slag system, activity of MgO, reference-slag, method, enthalpy, solution Published in DiRROS: 22.06.2022; Views: 454; Downloads: 127 Link to file |