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Journal articles on the topic 'Mathematical precursors'

Author: Grafiati

Published: 11 March 2023

Last updated: 31 July 2025

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1

Cirino, Paul T. "The interrelationships of mathematical precursors in kindergarten." Journal of Experimental Child Psychology 108, no. 4 (2011): 713–33. http://dx.doi.org/10.1016/j.jecp.2010.11.004.

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Nikolopoulos, Dimitrios, Demetrios Cantzos, Aftab Alam, Stavros Dimopoulos, and Ermioni Petraki. "Electromagnetic and Radon Earthquake Precursors." Geosciences 14, no. 10 (2024): 271. http://dx.doi.org/10.3390/geosciences14100271.

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Earthquake forecasting is arguably one of the most challenging tasks in Earth sciences owing to the high complexity of the earthquake process. Over the past 40 years, there has been a plethora of work on finding credible, consistent and accurate earthquake precursors. This paper is a cumulative survey on earthquake precursor research, arranged into two broad categories: electromagnetic precursors and radon precursors. In the first category, methods related to measuring electromagnetic radiation in a wide frequency range, i.e., from a few Hz to several MHz, are presented. Precursors based on op

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Swain, Arpit C., José A. M. Borghans, and Rob J. de Boer. "How are estimated cellular turnover rates influenced by the dynamics of a source population?" PLOS Computational Biology 21, no. 5 (2025): e1013052. https://doi.org/10.1371/journal.pcbi.1013052.

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Estimating production and loss rates of cell populations is essential but difficult. The current state-of-the-art method to estimate these rates involves mathematical modelling of deuterium labelling experiments. Current models typically assume that the labelling in the precursors of the population of interest (POI) is proportional to the deuterium enrichment in body water/glucose. This assumption is not always true and it is known that this can have a significant effect on the rates estimated from labelling experiments. Here we quantify the effect that different turnover (replacement) rates o

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Nogues, Camila Peres, and Beatriz Vargas Dorneles. "Systematic review on the precursors of initial mathematical performance." International Journal of Educational Research Open 2-2 (2021): 100035. http://dx.doi.org/10.1016/j.ijedro.2021.100035.

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Waniewski, J., and D. Přlkrylovà. "A Mathematical Model of Extracorporeal Antibody Removal in Autoimmune Disease." International Journal of Artificial Organs 12, no. 7 (1989): 471–76. https://doi.org/10.1177/039139888901200711.

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A mathematical model of T-B cell cooperation is adopted to describe autotoler-ance and autoimmunity. The model describes the development of plasma cells and T-helper cells from their precursors through activated and proliferating cells. A state of autotolerance is simulated by reducing the rate of T precursors supply (partial clonal deletion theory), while the normal rate yields a stable state of autoimmunity. During the state of autoimmunity extracorporeal removal of autoantibody and immunosuppression are simulated. Removal of autoantibody alone results in stimulation of the immune system and

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El-Geassy, A. A., K. S. Abdel Halim, and Abdulaziz S. Alghamdi. "A Novel Hydro-Thermal Synthesis of Nano-Structured Molybdenum-Iron Intermetallic Alloys at Relatively Low Temperatures." Materials 16, no. 7 (2023): 2736. http://dx.doi.org/10.3390/ma16072736.

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Nano-structured Mo/Fe intermetallics were synthesized from precursors that contained 72/28% and 30/70% molar ratios of Mo/Fe, which were given as precursors A and B, respectively. These precursors were prepared from the co-precipitation of aqueous hot solutions of ammonium heptamolybdate tetrahydrate (AHM) and ferrous oxalate. The dry precipitates were thermally treated using TG-DSC to follow up their behavior during roasting, in an Ar atmosphere of up to 700 °C (10° K/min). The TG profile showed that 32.5% and 55.5% weight losses were measured from the thermal treatment of precursors A and B,

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Guzev, Mikhail, and Vladimir Makarov. "Investigation of Deformation of Rock Samples." Key Engineering Materials 744 (July 2017): 61–65. http://dx.doi.org/10.4028/www.scientific.net/kem.744.61.

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Deformation of rock samples compressed up to failure has been studied in laboratory. A system of trustworthy deformational precursors of the failure stage has been developed. The system includes long-term, middle-term and short-term precursors, which correspond to the threshold of dilatancy, change of the specific volume deformation, and jump of the specific volume deformation increments, respectively. Proposed methods of the complex research include deformation and mathematical methods. The mathematical model of deformation in samples of rocks at uniaxial compression is founded on hypothesis

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KIRIA, TENGIZ, Tamaz Chelidze, and Jemal Kiria. "A Mathematical Exploration of Pre-Earthquake Seismicity." Prevention and Treatment of Natural Disasters 3, no. 2 (2024): 199–207. https://doi.org/10.54963/ptnd.v3i2.324.

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Abstract Understanding the dynamics of pre-earthquake seismicity is crucial for advancing earthquake forecast and risk assessment. In this paper, we embark on a mathematical exploration of pre-earthquake seismic activity, aiming to elucidate the underlying patterns and mechanisms leading up to major seismic events. Leveraging probabilistic modeling techniques, we analyze historical seismic data to identify precursory signals and assess their predictive value. Our investigation encompasses the study of foreshock activity, preceding earthquakes, shedding light on the temporal and spatial charact

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KHAN, K. M., W. AHMAD, and K. IQBAL. "A NONTHERMAL MODEL FOR CATALYTIC SURFACE REACTION OF THE TYPE A2+B2→2AB: A MONTE CARLO SIMULATION STUDY." International Journal of Modern Physics C 14, no. 10 (2003): 1413–26. http://dx.doi.org/10.1142/s0129183103005492.

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The kinetics of irreversible dimer–dimer reaction of the type A2+B2→2AB has already been studied through Monte Carlo simulation via a model based on Langmuir–Hinshelwood (thermal) mechanism. The results of this study are well known. There is single transition point (yC) at yB=0.5 (where yB is partial pressure of B2 dimer in gas phase), which separates the two poisoned states from each other. Here, we have studied this reaction on the basis of a nonthermal model, which involves the precursor motion of B2 molecule. The most interesting feature of this model is that it yields a steady reactive wi

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Sajid, Muhammad, Apu Chowdhury, Ghulam Bary, et al. "Conversion of Fructose to 5-Hydroxymethyl Furfural: Mathematical Solution with Experimental Validation." Journal of Mathematics 2022 (April 29, 2022): 1–8. http://dx.doi.org/10.1155/2022/6989612.

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Conversion of fructose to furan aldehydes is a rapidly developing concept considering the emergent scenario of the replacement of fossil-derived components to biomass-derived green precursors. 5-hydroxymethyl furfural (HMF) and levulinic acid (LA) are the two most important bio-precursors with expanded downstream utilization in modern industries. Their production from biomass-derived sugars is a complex reaction due to competitive side reactions with a variety of byproducts. Therefore, their simulated optimization is an important tool that can help for process optimization in an economical way

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Bazan, Carlos. "Effect of the University’s Environment and Support System on Subjective Social Norms as Precursor of the Entrepreneurial Intention of Students." SAGE Open 12, no. 4 (2022): 215824402211291. http://dx.doi.org/10.1177/21582440221129105.

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In this study, we aim to understand the influence of the university’s environment and support system (ESS) on subjective social norms (SSN) as one of the precursors of the entrepreneurial intention (EI) of university students. For this, we applied a customized mathematical model of EI based on the theory of planned behavior to probe whether the university’s ESS can affect SSN and analyze the paths that this influence may follow to form the EI of students. In other words, this study argues that the university plays a critical dual role in shaping the EI of students. First, it can provide suppor

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Zolotov, O. V., A. A. Namgaladze, I. E. Zakharenkova, O. V. Martynenko, and I. I. Shagimuratov. "Physical interpretation and mathematical simulation of ionospheric precursors of earthquakes at midlatitudes." Geomagnetism and Aeronomy 52, no. 3 (2012): 390–97. http://dx.doi.org/10.1134/s0016793212030152.

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Aragón, Estíbaliz, Gamal Cerda, Cándida Delgado, Manuel Aguilar, and José Navarro. "Individual differences in general and specific cognitive precursors in early mathematical learning." Psicothema 2, no. 31 (2019): 156–62. http://dx.doi.org/10.7334/psicothema2018.306.

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Torresi, Sandra. "Interaction between domain-specific and domain-general abilities in math´s competence." Journal of Applied Cognitive Neuroscience 1, no. 1 (2020): 43–51. http://dx.doi.org/10.17981/jacn.1.1.2020.08.

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This article is an approach to some viewpoints about interactions between domain-specific and general cognitive tools involved in the development of mathematical competence. Many studies report positive correlations between the acuity of the numerical approximation system and formal mathematical performance, while another important group of investigations have found no evidence of a direct connection between non-symbolic and symbolic numerical representations. The challenge for future research will be to focus on correlations and possible causalities between non-symbolic and symbolic arithmeti

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Polonsky, Michal, Jacob Rimer, Amos Kern-Perets, et al. "Induction of CD4 T cell memory by local cellular collectivity." Science 360, no. 6394 (2018): eaaj1853. http://dx.doi.org/10.1126/science.aaj1853.

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Cell differentiation is directed by signals driving progenitors into specialized cell types. This process can involve collective decision-making, when differentiating cells determine their lineage choice by interacting with each other. We used live-cell imaging in microwell arrays to study collective processes affecting differentiation of naïve CD4+ T cells into memory precursors. We found that differentiation of precursor memory T cells sharply increases above a threshold number of locally interacting cells. These homotypic interactions involve the cytokines interleukin-2 (IL-2) and IL-6, whi

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Toll, Sylke W. M., Sanne H. G. Van der Ven, Evelyn H. Kroesbergen, and Johannes E. H. Van Luit. "Executive Functions as Predictors of Math Learning Disabilities." Journal of Learning Disabilities 44, no. 6 (2010): 521–32. http://dx.doi.org/10.1177/0022219410387302.

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In the past years, an increasing number of studies have investigated executive functions as predictors of individual differences in mathematical abilities. The present longitudinal study was designed to investigate whether the executive functions shifting, inhibition, and working memory differ between low achieving and typically achieving children and whether these executive functions can be seen as precursors to math learning disabilities in children. Furthermore, the predictive value of working memory ability compared to preparatory mathematical abilities was examined. Two classifications we

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Ávila, Raymond Rosa. "Technology for Location, Analysis and Interpretation of Magnetic Alterations as Precursors of Seismic Phenomena Update." Civil Engineering Beyond Limits 2, no. 4 (2021): 17–21. http://dx.doi.org/10.36937/cebel.2021.004.004.

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To date, several studies have shown that the Earth's magnetic field suffers alterations at the local geographical location before an earthquake occur. Its study demonstrates that the Earth’s magnetic alterations at specific local geographical zone, is a local seismic precursor alerting a proximity of an earthquake with a margin of error of approximately 10%. The electromagnetic noise from background is very confusing, but that reason was necessary to identify these electromagnetic signal precursors by filtering a large amount of noise. To isolate the electromagnetic noise, was implemented a Ma

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Aunio, Pirjo, Riikka Mononen, Anu Laine, et al. "Mathematical learning difficulties – snapshots of current European research." Lumat: International Journal of Math, Science and Technology Education 3, no. 5 (2015): 647–74. http://dx.doi.org/10.31129/lumat.v3i5.1011.

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In November 2014 we had a wonderful possibility to organize a seminar International Seminar on Mathematical Learning Difficulties with our international colleagues in the field of mathematical learning difficulties. One of the main aims was to provide open lectures for the staff members and students in University of Helsinki. The meeting was supported by the Teachers’ Academy in University of Helsinki. We have collected extensive summaries of the presentations to form this special issue. The summaries are found in both English and Finnish. To sum up the main ideas from the presentations. First

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Makarov, Vladimir. "Method of Reduction of Geodynamical Phenomena Catastrophical Effects on the Base of Multichannel Methods of the Precursors Finding." E3S Web of Conferences 129 (2019): 01024. http://dx.doi.org/10.1051/e3sconf/201912901024.

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Decrease in risk of catastrophic consequences of the geodynamic phenomena of phylum of rock bursts or earthquakes demands the development of prognosis base of these events. Research of laws of formation and development of mesocracking structures on rocks samples is the most effective path of dilating of representations about mechanisms of the geodynamic phenomena and working out of methods of reduction of risks of their catastrophic exhibitings. Mathematical modelling of mesocracking structures of various hierarchical level of geomedium demands, in turn, development of theoretical base of mode

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Namgaladze, A. A., M. V. Klimenko, V. V. Klimenko, and I. E. Zakharenkova. "Physical mechanism and mathematical modeling of earthquake ionospheric precursors registered in total electron content." Geomagnetism and Aeronomy 49, no. 2 (2009): 252–62. http://dx.doi.org/10.1134/s0016793209020169.

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Cederlöf, M., P. Östberg, E. Pettersson, et al. "Language and mathematical problems as precursors of psychotic-like experiences and juvenile mania symptoms." Psychological Medicine 44, no. 6 (2013): 1293–302. http://dx.doi.org/10.1017/s0033291713002018.

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BackgroundPsychotic-like experiences (PLEs) and juvenile mania in adolescence index risk for severe psychopathology in adulthood. The importance of childhood problems with communication, reading, speech and mathematics for the development of PLEs and juvenile mania is not well understood.MethodThrough the Child and Adolescent Twin Study in Sweden, we identified 5812 children. The parents were interviewed about their children's development at age 9 or 12 years. At age 15 or 18 years, children and parents completed questionnaires targeting current PLEs and juvenile mania symptoms. Logistic regre

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HUBENY, VERONIKA E. "PRECURSORS SEE INSIDE BLACK HOLES." International Journal of Modern Physics D 12, no. 09 (2003): 1693–98. http://dx.doi.org/10.1142/s0218271803003992.

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We consider, within a string theoretic context, the accessibility of events inside a black hole horizon. We present a gedankenexperiment which uses the nonlocal nature of precursors in the AdS/CFT correspondence, as well as the global nature of event horizons, to argue that the dual field theory does contain information about physics inside black holes. This alleviates the causal obstacles to accessing behind-the-horizon physics, thereby rendering more tractable certain long-standing questions of quantum gravity, such as the information paradox and possibly even singularity resolution.

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Kelleher, J. K., A. T. Kharroubi, T. A. Aldaghlas, et al. "Isotopomer spectral analysis of cholesterol synthesis: applications in human hepatoma cells." American Journal of Physiology-Endocrinology and Metabolism 266, no. 3 (1994): E384—E395. http://dx.doi.org/10.1152/ajpendo.1994.266.3.e384.

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Cholesterol synthesis from 13C-labeled precursors produces a discrete spectrum of mass isotopomers detectable using gas chromatography-mass spectrometry. The isotopomer spectral analysis (ISA) method matches the observed spectrum of cholesterol isotopomers with a mathematical model to obtain the best fit of model spectrum to data spectrum. The model was based on multinomial probability expressions that simulate cholesterol synthesis as a condensation of mevalonate fragments. As many as four unknown parameters, representing fluxes between compartments, were included in the model. Models were de

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Moreno-Zambrano, Mauricio, Sergio Grimbs, Matthias S. Ullrich, and Marc-Thorsten Hütt. "A mathematical model of cocoa bean fermentation." Royal Society Open Science 5, no. 10 (2018): 180964. http://dx.doi.org/10.1098/rsos.180964.

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Cocoa bean fermentation relies on the sequential activation of several microbial populations, triggering a temporal pattern of biochemical transformations. Understanding this complex process is of tremendous importance as it is known to form the precursors of the resulting chocolate’s flavour and taste. At the same time, cocoa bean fermentation is one of the least controlled processes in the food industry. Here, a quantitative model of cocoa bean fermentation is constructed based on available microbiological and biochemical knowledge. The model is formulated as a system of coupled ordinary dif

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Hyrien, Ollivier, Jörg Dietrich, and Mark Noble. "Mathematical and Experimental Approaches to Identify and Predict the Effects of Chemotherapy on Neuroglial Precursors." Cancer Research 70, no. 24 (2010): 10051–59. http://dx.doi.org/10.1158/0008-5472.can-10-1400.

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Ouyang, Xiangzi, Xinzhuo Zou, and Xiao Zhang. "General cognitive and numerical precursors of mathematical difficulty in kindergarten children at risk for dyscalculia." Learning and Individual Differences 114 (August 2024): 102514. http://dx.doi.org/10.1016/j.lindif.2024.102514.

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Träff, Ulf, Linda Olsson, Kenny Skagerlund, and Rickard Östergren. "Kindergarten domain-specific and domain-general cognitive precursors of hierarchical mathematical development: A longitudinal study." Journal of Educational Psychology 112, no. 1 (2020): 93–109. http://dx.doi.org/10.1037/edu0000369.

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Cant, John P., and Brian W. McBride. "Mathematical analysis of the relationship between blood flow and uptake of nutrients in the mammary glands of a lactating cow." Journal of Dairy Research 62, no. 3 (1995): 405–22. http://dx.doi.org/10.1017/s0022029900031113.

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SummaryA dynamic mathematical model of blood flow regulation in the mammary glands of a lactating cow was constructed from a principle of local vasodilator release in response to changes in intracellular adenylate charge. An equation was derived to predict uptake of the milk precursors acetate, glucose, amino acids and fatty acids, as affected by mammary blood flow rate. Metabolism of the precursors to milk components and CO2 was simulated with a set of empirically derived equations. Relative rates of ATP production and utilization regulated both the number of perfused capillaries and the cond

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Chashechkin, Yuli D. "Singular perturbed components of flows – linear precursors of shock waves." Mathematical Modelling of Natural Phenomena 13, no. 2 (2018): 17. http://dx.doi.org/10.1051/mmnp/2018020.

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A comparative analysis of the infinitesimal symmetries of various well-known systems of governing equations used for mathematical descriptions of flows and waves in fluids has shown that only the basic system of equations, including the empirical equation of state and the partial differential equations of mass, momentum, energy and matter transport, is characterized by a ten-parameter Galilean transformation group. An analysis of the complete solutions of the linearized system of fundamental equations for weakly dissipating media reveals a wide class of previously unknown singularly perturbed

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Tolmachev, Daniil, Roman Chertovskih, Simon Ranjith Jeyabalan, and Vladislav Zheligovsky. "Predictability of Magnetic Field Reversals." Mathematics 12, no. 3 (2024): 490. http://dx.doi.org/10.3390/math12030490.

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Geomagnetic field measurements indicate that at present we may be on the brink of the Earth’s magnetic field reversal, potentially resulting in all the accompanying negative consequences for the mankind. Mathematical modelling is necessary in order to find precursors for reversals and excursions of the magnetic field. With this purpose in mind, following the Podvigina scenario for the emergence of the reversals, we have studied convective flows not far (in the parameter space) from their onset and the onset of magnetic field generation, and found a flow demonstrating reversals of polarity of s

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Finocchiaro, Claudio, Germana Barone, Paolo Mazzoleni, et al. "Artificial neural networks test for the prediction of chemical stability of pyroclastic deposits-based AAMs and comparison with conventional mathematical approach (MLR)." Journal of Materials Science 56, no. 1 (2020): 513–27. http://dx.doi.org/10.1007/s10853-020-05250-w.

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Abstract The investigation on the reticulation degree of volcanic alkali-activated materials, AAMs, were experimentally determined in terms of chemico-physical properties: weight loss after leaching test in water, ionic conductivity and pH of the leachate and compressive strength. Artificial neural network (ANN) was successfully applied to predict the chemical stability of volcanic alkali-activated materials. Nine input data per each chemico-physical parameter were used to train each ANN. The training series of specific volcanic precursors were tested also for the other one. Excellent correlat

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Passolunghi, M. Chiara, Irene C. Mammarella, and Gianmarco Altoè. "Cognitive Abilities as Precursors of the Early Acquisition of Mathematical Skills During First Through Second Grades." Developmental Neuropsychology 33, no. 3 (2008): 229–50. http://dx.doi.org/10.1080/87565640801982320.

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Assel, Mike A., Susan H. Landry, Paul Swank, Karen E. Smith, and Laura M. Steelman. "Precursors to Mathematical Skills: Examining the Roles of Visual-Spatial Skills, Executive Processes, and Parenting Factors." Applied Developmental Science 7, no. 1 (2003): 27–38. http://dx.doi.org/10.1207/s1532480xads0701_3.

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Khalimonchuk, V. A. "Mid-Weighed Kinetic Parameters for Use in the Two-Group Diffusion Model of Reactor Dynamics with Fuel Based on a Mixture of Fission Isotopes." Nuclear and Radiation Safety, no. 1(81) (March 12, 2019): 58–61. http://dx.doi.org/10.32918/nrs.2019.1(81).10.

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In the model of reactor kinetics based on the description of neutron transport in the two-group diffusion approximation, the number of equations describing the change in the concentration of delayed neutron precursors depends not only on the number of groups of delayed neutrons, but also on the number of fissile isotopes present in nuclear fuel. Since each isotope is characterized by six groups of delayed neutrons, the total number of differential equations describing concentrations of delayed neutron precursors is equal to the product of the number of fissile isotopes (M) and the number of gr

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Passolunghi, Maria Chiara, and Silvia Lanfranchi. "Domain-specific and domain-general precursors of mathematical achievement: A longitudinal study from kindergarten to first grade." British Journal of Educational Psychology 82, no. 1 (2011): 42–63. http://dx.doi.org/10.1111/j.2044-8279.2011.02039.x.

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Razanov, S. F., O. P. Tkachuk, O. M. Bakhmat, and A. M. Razanova. "Reducing danger of heavy metals accumulation in winter wheat grain which is grown after leguminous perennial precursor." Ukrainian Journal of Ecology 10, no. 1 (2020): 254–60. http://dx.doi.org/10.15421/2020_40.

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Goal. Assessment of the influence of growing leguminous perennial herbs on the intensity of heavy metals accumulation in winter wheat as in a subsequent crop rotation. Methods. Field, laboratory atomic absorption method, mathematical and statistical processing. Results. cultivation of winter wheat after precursors of Medicago sativa I., Trifolium pratense L., Onobrychis arenaria Kit., Melilotus albus L., Lotus corniculatus L. or Galéga orientalis Lam. leads to a decrease in the content of lead by 1.8-2.5 times, cadmium – by 1.7–2.6 times, copper - 2.2–4.6 times and zinc - 1.6–1.9 times compare

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Kelleher, J. K. "Gluconeogenesis from labeled carbon: estimating isotope dilution." American Journal of Physiology-Endocrinology and Metabolism 250, no. 3 (1986): E296—E305. http://dx.doi.org/10.1152/ajpendo.1986.250.3.e296.

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To estimate the rate of gluconeogenesis from steady-state incorporation of labeled 3-carbon precursors into glucose, isotope dilution must be considered so that the rate of labeling of glucose can be quantitatively converted to the rate of gluconeogenesis. An expression for the value of this isotope dilution can be derived using mathematical techniques and a model of the tricarboxylic acid (TCA) cycle. The present investigation employs a more complex model than that used in previous studies. This model includes the following pathways that may affect the correction for isotope dilution: 1) flux

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Konstantaras, A., G. N. Fouskitakis, J. P. Makris, and F. Vallianatos. "Stochastic analysis of geo-electric field singularities as seismically correlated candidates." Natural Hazards and Earth System Sciences 8, no. 6 (2008): 1451–62. http://dx.doi.org/10.5194/nhess-8-1451-2008.

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Abstract. The study of the Earth's electromagnetic field prior to the occurrence of strong seismic events has repeatedly revealed cases where transient electric potential anomalies, often deemed as possible earthquake precursors, were observed on electromagnetic field recordings. In an attempt to understand the nature of such signals, several models have been proposed based upon the exhibited characteristics of the observed anomalies, often supported by different mathematical models simulating possible generation mechanisms. This paper discusses a candidate Electric Earthquake Precursor (EEP)

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Taskesen, Teoman, Devendra Pareek, David Nowak, et al. "Potential of CZTSe Solar Cells Fabricated by an Alloy-Based Processing Strategy." Zeitschrift für Naturforschung A 74, no. 8 (2019): 673–82. http://dx.doi.org/10.1515/zna-2019-0136.

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AbstractIn this manuscript, we give an overview of the main insights into our growth procedure for kesterite solar cells and show the possibilities that are provided by this approach. The importance of using Cu–Sn alloy instead of elemental Sn and Cu in the precursor is shown. We discuss how the alloy approach stabilises the composition and helps guide the process along a preferred reaction pathway. A summary of our previously reported findings in the context of our latest results on kesterite solar cells prepared from Cu–Sn alloyed precursors is drawn. The positive impact of an alloy precurso

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Sofroniou, Anastasia, Bhairavi Premnath, and Kevin Jagadissen Munisami. "An Insight into the Dynamical Behaviour of the Swing Equation." WSEAS TRANSACTIONS ON MATHEMATICS 22 (January 25, 2023): 70–78. http://dx.doi.org/10.37394/23206.2023.22.9.

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Motivated by the nonlinear dynamics of mathematical models encountered in power systems, an investigation into the dynamical behaviour of the swing equation is carried out. This paper examines analytically and numerically the development of oscillatory periodic solutions, whereby increases of the control parameter, lead to a cascade of period doubling bifurcations, before eventually loss in stability is exhibited and effective forerunners to chaos revealed. Gaining an understanding on the dynamical behaviour of the system can help to produce a deeper insight of the bifurcations entailed, with

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Hobbs, Bradley K., and Nikolai G. Wenzel. "The Physiocrats: Friends or Foes of Liberty?" New Perspectives on Political Economy 14, no. 1-2 (2018): 5–20. http://dx.doi.org/10.62374/cskf1g15.

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Were the Physiocrats friends or foes of liberty? Some classical liberal economists hail the Physiocrats as precursors of modern liberty, while others decry them for planting the seeds of mathematical economics and interventionism. Smith and Rothbard praise the Physiocrats, while Hayek, Roepke and Tocqueville damn them. While we focus on classical liberal interpretations of the Physiocrats, we also return to the secondary literature – but also to the writings of François Quesnay, founder of Physiocracy. We find a mixed bag, and both strains of classical liberalism are partially correct. The Phy

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Matyszczak, Grzegorz, Krzysztof Krawczyk, Albert Yedzikhanau, and Michał Brzozowski. "A Chemical Transport Method for the Synthesis of Simple and Complex Inorganic Crystals—Survey of Applications and Modeling." Crystals 15, no. 2 (2025): 162. https://doi.org/10.3390/cryst15020162.

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The chemical transport method is a process that occurs naturally; however, it is also very useful in the chemical laboratory environment for the synthesis of inorganic crystals. It was successfully used for the syntheses of simple and complex inorganic compounds, from binary (e.g., ZnS, CdSe) to quaternary (e.g., Cu2ZnSnS4) compounds. Many experimental parameters influence the quality of products of chemical transport reactions, and among them, one may distinguish the used precursors and applied temperature gradient. The careful selection of experimental conditions is crucial for the productio

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Claire, M., J. L. Steimer, M. E. Oblin, et al. "Cytoplasmic and nuclear uptake of aldosterone in toad bladder: a mathematical modeling approach." American Journal of Physiology-Cell Physiology 248, no. 1 (1985): C88—C101. http://dx.doi.org/10.1152/ajpcell.1985.248.1.c88.

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The mechanism of aldosterone uptake in the epithelial cells of toad bladder was studied using mathematical modeling. Two complementary approaches were used. The first involved analysis of cytosolic aldosterone binding at steady state according to models defined by the sum of independent noninteractive binding sites. The best model describing the experimental data corresponded to two specific binding sites with mean dissociation constant values of 0.20 and 60 nM for types 1 and 2, respectively. The second approach was based on the analysis of cytoplasmic and nuclear aldosterone uptake kinetics

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Huo, Xiaoxu, Jing Li, Yun-Feng Cao, et al. "Trimethylamine N-Oxide Metabolites in Early Pregnancy and Risk of Gestational Diabetes: A Nested Case-Control Study." Journal of Clinical Endocrinology & Metabolism 104, no. 11 (2019): 5529–39. http://dx.doi.org/10.1210/jc.2019-00710.

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Abstract Objectives This study aimed to investigate the associations between trimethylamine N-oxide (TMAO) and related metabolites in early pregnancy and the risk of gestational diabetes mellitus (GDM). Design A prospective cohort of 22,302 pregnant women from 2010 to 2012 in Tianjin, China, was used to perform a nested case-control study. A total of 243 women with GDM and 243 women without GDM matched by maternal age (±1 year) were used as cases and controls, respectively. Conditional logistic regression and restricted cubic spline were used to examine the full-range risk associations between

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Tournus, Magali, Miguel Escobedo, Wei-Feng Xue, and Marie Doumic. "Insights into the dynamic trajectories of protein filament division revealed by numerical investigation into the mathematical model of pure fragmentation." PLOS Computational Biology 17, no. 9 (2021): e1008964. http://dx.doi.org/10.1371/journal.pcbi.1008964.

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The dynamics by which polymeric protein filaments divide in the presence of negligible growth, for example due to the depletion of free monomeric precursors, can be described by the universal mathematical equations of ‘pure fragmentation’. The rates of fragmentation reactions reflect the stability of the protein filaments towards breakage, which is of importance in biology and biomedicine for instance in governing the creation of amyloid seeds and the propagation of prions. Here, we devised from mathematical theory inversion formulae to recover the division rates and division kernel informatio

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NAHORNYI, VOLODYMYR, ANTON PANDA, VALENTINO STRASER, and IVETA PANDOVA. "FORECASTING AN VIBRATION BY MONITORING THE DYNAMICS OF CHANGES ITS PRECURSORS OF VARIOUS PHYSICAL NATURE." MM Science Journal 2021, no. 2 (2021): 4396–99. http://dx.doi.org/10.17973/mmsj.2021_6_2021019.

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Prediction crosses all fields of Science, being itself the evident manifestation of the Scientific Method. This study addresses the delicate aspect of vibration forecasting, which considers the association and interaction between the variables involved, such as radio anomalies, the proton density of the solar wind preceding strong vibration. The analysis is based on the collection of about 800 data of vibration of range equal to or greater than 6 occurred on a global scale between 2012 and 2014, related to solar wind and radio anomalies detected before the disastrous Tohoku vibration of March

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Gemming, Sibylle, Matthias Lehmann, and Gotthard Seifert. "Semi-flexible star-shaped molecules: conformational analysis of nano-segregated mesogens forming columnar liquid-crystal phases." International Journal of Materials Research 96, no. 9 (2005): 988–97. http://dx.doi.org/10.1515/ijmr-2005-0172.

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Abstract The structural prerequisites are investigated, which make star-shaped molecules suitable precursors for the formation of columnar liquid-crystalline phases. Electronic structure calculations on smaller mesogens show that not all conformers exhibit the atomistic structure, the stability against distortion, and additional dipole moments, which favour columnar stacking. For the presently studied compounds with short terminating alkyl chains, the calculations indicate that the steric factor becomes dominant with increasing star size. Thus, the optimised geometric structures were employed

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Ahmed, Hesham M., Abdel-Hady A. El-Geassy, Nurni Neelakantan Viswanathan, and Seshadri Seetharaman. "Kinetics and Mathematical Modeling of Hydrogen Reduction of NiO–WO₃ Precursors in Fluidized Bed Reactor." ISIJ International 51, no. 9 (2011): 1383–91. http://dx.doi.org/10.2355/isijinternational.51.1383.

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ZHOU, WEI-XING, and DIDIER SORNETTE. "NONPARAMETRIC ANALYSES OF LOG-PERIODIC PRECURSORS TO FINANCIAL CRASHES." International Journal of Modern Physics C 14, no. 08 (2003): 1107–25. http://dx.doi.org/10.1142/s0129183103005212.

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We apply two nonparametric methods to further test the hypothesis that log-periodicity characterizes the detrended price trajectory of large financial indices prior to financial crashes or strong corrections. The term "parametric" refers here to the use of the log-periodic power law formula to fit the data; in contrast, "nonparametric" refers to the use of general tools such as Fourier transform, and in the present case the Hilbert transform and the so-called (H, q)-analysis. The analysis using the (H, q)-derivative is applied to seven time series ending with the October 1987 crash, the Octobe

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Bauer, G. E. W. "Precursors of the excitonic insulator in excited quantum wells." Physica Scripta T45 (January 1, 1992): 154–57. http://dx.doi.org/10.1088/0031-8949/1992/t45/032.

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