Article
Multidisciplinary Sciences
Valeriy G. Narushin, Alexander W. Griffin, Michael N. Romanov, Darren K. Griffin
Summary: This study investigates the variation in the k factor of the neutral axis in avian eggs and finds that not all bird species conform to the golden ratio. The neutral axis in eggs of domesticated species, such as chicken, ducks, and geese, corresponds to the golden ratio, while spherical and ellipsoid eggs have lower k values and pyriform eggs have higher k values.
ANNALS OF THE NEW YORK ACADEMY OF SCIENCES
(2022)
Article
Multidisciplinary Sciences
E. Martin Hechenleitner, Maria V. Fernandez Blanco, Segundo R. Nunez-Campero, Lucas E. Fiorelli, Paula Bona
Summary: Researchers used X-ray micro-CT scans to characterize crocodilian eggshells for the first time, revealing complex ornamentation and unique pore canal structures. These features may be related to nesting materials and nesting areas selected by different species.
SCIENTIFIC REPORTS
(2023)
Article
Mathematics
Jonathan Kress, Konrad Schoebel, Andreas Vollmer
Summary: In this paper, a new algebraic-geometric approach is proposed for the classification of second-order superintegrable systems in higher dimensions. By utilizing the geometric properties of the classification space, this approach establishes the foundations for a complete classification of superintegrable systems in arbitrary dimension, with potential applications in quadratic symmetry algebras and special functions.
JOURNAL OF GEOMETRIC ANALYSIS
(2023)
Article
Biology
Hsiao-Jou Wu, Yu-Chien Tseng, Shu-Han Tsao, Pei-Lin Chiang, Wei-Yu Tai, Hsin- Hsieh, Hon-Tsen Yu, Jia-Yang Juang
Summary: Through testing 214 freshly laid eggs belonging to 16 species across three orders of Class Reptilia using mechanical compression tests, we found that reptilian eggs are stiffer compared to bird eggs with respect to their mass. However, the Young's moduli of reptilian eggshells are similar to avian eggshells, despite different crystal forms, microstructures, and crystallography. We also observed a high mineralization level in reptilian eggshells, with aragonite shells generally being stiffer than calcite shells.
Article
Energy & Fuels
Xinhui Xie, Hucheng Deng, Meiyan Fu, Lanxiao Hu, Jianhua He
Summary: The research investigates the complex pore structure of the Upper Triassic continental shale in the Yan-Chang #7 Formation of the Ordos Basin, China. Results show that total pore volume and specific surface area are positively correlated with TOC and clay minerals, while negatively correlated with brittle minerals. Clay minerals contribute to interparticle pores and micro-fractures in the formation.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Francisco J. Bravo Sanchez, Md Rahat Hossain, Nathan B. English, Steven T. Moore
Summary: The study demonstrates the efficient and accurate performance of SincNet neural network architecture in animal sound classification, showing comparable performance to traditional methods but with greater efficiency.
SCIENTIFIC REPORTS
(2021)
Article
Construction & Building Technology
Aileen Vandenberg, Hela Bessaies-Bey, Kay Wille, Nicolas Roussel
Summary: This study investigates the impact of mixing intensity on the size and concentration of nanoparticles in quartz and cement systems. The results show that high mixing intensity leads to detachment of nano-hydrates from cement particles, which can only be stabilized and detected in the presence of superplasticizers.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Construction & Building Technology
Fahad Alsharari, Kaffayatullah Khan, Muhammad Nasir Amin, Waqas Ahmad, Usama Khan, Mohammed Mutnbak, Moustafa Houda, Ahmed M. Yosri
Summary: This study evaluated the compressive strength of cement-based materials incorporating eggshell powder as a partial substitute using both experimental and machine learning strategies. The experiment showed that adding eggshell powder increased the compressive strength of the materials at lower replacement ratios. Machine learning models, especially the bagging regressor, predicted the compressive strength with a higher degree of precision. The use of waste eggshells in building materials has environmental and cost benefits, while machine learning approaches benefit the construction sector by analyzing material properties efficiently and economically.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Chemistry, Analytical
Anna Pakula, Wojciech Zolnowski, Slawomir Pasko, Olimpia Kursa, Pawel Marc, Leszek R. Jaroszewicz
Summary: In this paper, a multispectral portable fibre-optic reflectometer and signal processing patch, along with a machine-learning algorithm, are proposed for classifying the origins of chicken eggshells with Mycoplasma synoviae infection. The results show that the proposed method can accurately classify infected and non-infected eggshells based on spectral data and support vector machine algorithm.
Article
Multidisciplinary Sciences
D. Cary Woodruff, Ewan D. S. Wolff, Mathew J. Wedel, Sophie Dennison, Lawrence M. Witmer
Summary: Besides fractures, osteoarthritis, and periosteal reaction, there is limited evidence of non-osseous diseases in the fossil record of vertebrates. This study reports for the first time an avian-style respiratory disorder in a non-avian dinosaur, indicating that dinosaurs may have suffered from various diseases, providing insights into their medical disorders from a phylogenetic perspective.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Yu Lu, Shao-Ming Fei
Summary: We investigate genuine multipartite entanglement of arbitrary n-partite quantum states by utilizing the generalized Pauli operators to represent the density matrices. A general framework for detecting genuine multipartite entanglement and non-full separability of multipartite quantum states is introduced, based on correlation tensors. An effective criterion is derived to verify the genuine multipartite entanglement. Detailed examples demonstrate that the criterion detects more genuine multipartite entanglement than existing criteria.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Leiming M. M. Guo, Konstantinos Ntetsikas, Georgios Zapsas, Roshni Thankamony, Zhiping P. P. Lai, Nikos Hadjichristidis
Summary: The importance of enhancing the design of percolating nanopore structures in block copolymers (BCPs) has been widely demonstrated in various cases over the past several decades. However, it remains challenging to prepare the desired porous structures in a rapid, facile, and universal way. In this study, an unconventional strategy has been developed to rapidly generate nanoporous polystyrene-based BCPs with arbitrary structural characteristics, regardless of the BCP bulk morphology. This universal pore-forming strategy allows for the formation of advanced membranes with sustainable CO2-based BCPs, efficiently rejecting 94.2% brilliant blue R (826 g mol(-1)) after only 1 second of soaking. Meanwhile, the water permeance remains around 1020 L (m(2) h bar)(-1), which is 1-3 orders of magnitude higher than that of other membranes. This strategy provides an excellent opportunity to introduce percolating pore structures in newly developed BCPs that may not be addressed by previously reported pore-forming methods.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Jasmina Wiemann, Iris Menendez, Jason M. Crawford, Matteo Fabbri, Jacques A. Gauthier, Pincelli M. Hull, Mark A. Norell, Derek E. G. Briggs
Summary: Birds and mammals have the highest metabolic rates among living animals, which play a crucial role in their adaptability and ecological niches. The metabolic performance of birds exceeds that of mammals and is thought to have evolved gradually. This study also found no correlation between atmospheric oxygen concentrations and metabolic rates, suggesting that other factors may determine the evolution of metabolic rates.
Article
Engineering, Geological
Manuel Pastor, Saeid M. Tayyebi, Miguel M. Stickle, Miguel Molinos, Angel Yague, Diego Manzanal, Pedro Navas
Summary: The purpose of this research is to enhance the Finite Differences depth integrated SPH model developed by the authors to cope with flowing materials on the meshes and improve the excess pore pressure evolution model.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2022)
Article
Mathematics, Applied
Phuong Le
Summary: This study classifies all nonnegative nontrivial classical solutions to the given equation in R^n, with additional considerations for the case when alpha >= n, resulting in a Liouville type theorem. The method of moving spheres in integral forms is the main tool utilized in deriving these results.
DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS
(2021)