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Journal articles on the topic 'Non Cartan dynamics'

Author: Grafiati

Published: 14 March 2023

Last updated: 31 July 2025

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1

Bondarenko, Sergey. "Dynamical Signature: Complex Manifolds, Gauge Fields and Non-Flat Tangent Space." Universe 8, no. 10 (2022): 497. http://dx.doi.org/10.3390/universe8100497.

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Theoretical possibilities of models of gravity with dynamical signature are discussed. The different scenarios of the signature change are proposed in the framework of Einstein-Cartan gravity. We consider, subsequently, the dynamical signature in the model of the complex manifold with complex coordinates and complex metrics are introduced, a complexification of the manifold and coordinates through new gauge fields, an additional gauge symmetry for the Einstein-Cartan vierbein fields, and non-flat tangent space for the metric in the Einstein-Cartan gravity. A new small parameter, which characte

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2

Rubin, Jacques. "Applications of a Particular Four-Dimensional Projective Geometry to Galactic Dynamics." Galaxies 6, no. 3 (2018): 83. http://dx.doi.org/10.3390/galaxies6030083.

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Relativistic localizing systems that extend relativistic positioning systems show that pseudo-Riemannian space-time geometry is somehow encompassed in a particular four-dimensional projective geometry. The resulting geometric structure is then that of a generalized Cartan space (also called Cartan connection space) with projective connection. The result is that locally non-linear actions of projective groups via homographies systematically induce the existence of a particular space-time foliation independent of any space-time dynamics or solutions of Einstein’s equations for example. In this a

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3

Agop, Maricel, Tudor-Cristian Petrescu, Dumitru Filipeanu, et al. "Toward Complex Systems Dynamics through Flow Regimes of Multifractal Fluids." Symmetry 13, no. 5 (2021): 754. http://dx.doi.org/10.3390/sym13050754.

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In the framework of the Multifractal Theory of Motion, which is expressed by means of the multifractal hydrodynamic model, complex system dynamics are explained through uniform and non-uniform flow regimes of multifractal fluids. Thus, in the case of the uniform flow regime of the multifractal fluid, the dynamics’ description is “supported” only by the differentiable component of the velocity field, the non-differentiable component being null. In the case of the non-uniform flow regime of the multifractal fluid, the dynamics’ description is “supported” by both components of the velocity field,

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4

Re, Federico, and Oliver F. Piattella. "Non-Zero Coriolis Field in Ehlers’ Frame Theory." Galaxies 13, no. 2 (2025): 38. https://doi.org/10.3390/galaxies13020038.

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Ehlers’ Frame Theory is a class of geometric theories parameterized by λ:=1/c2 and identical to the General Theory of Relativity for λ≠0. The limit λ→0 does not recover Newtonian gravity, as one might expect, but yields the so-called Newton–Cartan theory of gravity, which is characterized by a second gravitational field ω, called the Coriolis field. Such a field encodes at a non-relativistic level the dragging feature of general spacetimes, as we show explicitly for the case of the (η,H) geometries. Taking advantage of the Coriolis field, we apply Ehlers’ theory to an axially symmetric distrib

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5

Racioppi, Antonio, and Alberto Salvio. "Natural metric-affine inflation." Journal of Cosmology and Astroparticle Physics 2024, no. 06 (2024): 033. http://dx.doi.org/10.1088/1475-7516/2024/06/033.

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Abstract We consider here natural inflation in the low energy (two-derivative) metric-affine theory containing only the minimal degrees of freedom in the inflationary sector, i.e. the massless graviton and the pseudo-Nambu-Goldstone boson (PNGB). This theory contains the Ricci-like and parity-odd Holst invariants together with non-minimal couplings between the PNGB and the above-mentioned invariants. The Palatini and Einstein-Cartan realizations of natural inflation are particular cases of our construction. Explicit models of this type featuring non-minimal couplings are shown to emerge from t

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6

Podrigalo, Mikhail, Volodymyr Peregon, Oleksandr Boboshko, Dmitrij Bogdan, and Oleksandr Koriak. "Kinematics of Hooke’s Joint." Vehicle and electronics. Innovative technologies, no. 21 (July 2, 2022): 48–56. http://dx.doi.org/10.30977/veit.2022.21.0.09.

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Problem. An analysis of the literature has shown that some issues of the kinematics and dynamics of the Hooke’s joint are not fully covered. In particular, this applies to the determination of the kinematic characteristics of the relative movements of the links in the movable joints of the crosspieces and cardan yokes, as well as the acceleration of the crosspiece in the study of the hinge. These kinematic characteristics are the basis for dynamic analysis of the cardan transmission; they are used at research of operation of the bearings of a cardan joint cross; they are necessary to determine

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7

Šuk, Jaroslav, Kateřina Hamouzová, Jana Hajšlová, and Miroslav Jursík. "Dynamics of herbicides degradation in carrot (Daucus carota L.) roots and leaves." Plant, Soil and Environment 67, No. 6 (2021): 353–59. http://dx.doi.org/10.17221/46/2021-pse.

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This research had two main aims. First, to analyse the degradation dynamics of herbicides commonly used in carrot (aclonifen, clomazone, flufenacet, linuron, metribuzin, pendimethalin, S-metolachlor). Second, to compare the amount of herbicide residues with the maximum residue level and with requirements of non-residual production. The field experiments were conducted in 2012–2016. All tested herbicides resulted in relatively low concentrations of residues in carrot roots (up to 10 µg/kg) when the recommended withdrawal period was followed between application and harvest. The concentration of

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8

Tomchina, Olga P. "Control of vibrational field in an elastic vibration unit with DC motors and time-varying observer." Cybernetics and Physics, Volume 10, 2021, Number 4 (December 31, 2021): 277–86. http://dx.doi.org/10.35470/2226-4116-2021-10-4-277-286.

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In the paper the problem of feedback control of vibrational fields in a vibration unit is analyzed taking into account the influence of the elasticity of cardan shafts, the drive dynamics, saturation for control torques. In addition, the synthesized rotor synchronization control algorithm uses the estimates of a non-stationary observer, which makes it possible to implement it practically on a two-rotor vibration unit SV-2. The performance of the closed loop mechatronic systems is examined by simulation for the model of the two-rotor vibration unit SV-2.

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9

Stoeva, Lora, and Lora Kirova. "Assessing the carbon stock changes in forest soils in Bulgaria." Silva Balcanica 22, no. (3) (2021): 69–78. https://doi.org/10.3897/silvabalcanica.22.e76252.

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Forest soils are a key element of the forest ecosystems which could contribute to carbon storage and climate change mitigation. The carbon sequestration and storage potential of the forest soils, however, depends to a great extent on the forestry operations and forest management activities carried out in the forest. There is a widely accepted assumption that under a set of climate and management conditions the carbon content in the forest soils is at equilibrium. However, different factors like management activities, productivity, decay rates and/or natural disturbances could alter the carbon

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10

Arda, M., and M. Aydogdu. "Nonlocal Gradient Approach on Torsional Vibration of CNTs." NOISE THEORY AND PRACTICE 3, no. 3 (2017): 2–10. https://doi.org/10.5281/zenodo.1470367.

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The nonlocal strain gradient approach for torsional vibration of CNTs have been investigated in the present study. The effects of the stress and strain gradient small scale parameters on the non-dimensional frequencies have been obtained. Strain Gradient Theory has stiffening effect on the dynamics of CNT. Combination of both theories gives more acceptable results according to Lattice Dynamics.

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11

Wei, Meng, Aijun Zhang, Zhonghou Tang, et al. "Active carbon pool-size is enhanced by long-term manure application." Plant, Soil and Environment 66, No. 11 (2020): 598–605. http://dx.doi.org/10.17221/426/2020-pse.

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We studied the dynamics of soil organic carbon (SOC)-pool mineralisation in agricultural soil. A laboratory incubation experiment was conducted using the soil from a long-term experiment involving the following fertilisation regimes: no fertilisation (CK); mineral (NPK); organic (M), and combined organic-inorganic fertilisers (MNPK). SOC mineralisation rate decreased as follows: MNPK &gt; M &gt; NPK &gt; CK. Cumulative SOC mineralisation (C<sub>m</sub>) ranged between 730.15 and 3 022.09 mg/kg in CK and MNPK, respectively; 8.81% (CK) to 20.45% (MNPK) of initial SOC was

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12

Feriadi, Yusron, Umar Fauzi, M. Rizqie Arbie, and Fariduzzaman. "The Effect of Porous Media Grain Size on non-Darcy Flow Behavior using Pore Scale Simulation." Journal of Physics: Conference Series 2734, no. 1 (2024): 012013. http://dx.doi.org/10.1088/1742-6596/2734/1/012013.

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Abstract The impact of grain size of the porous media of the 3D images of a beadpack on the permeability values and non-Darcy flow behaviour is analyzed using pore-scale flow modelling utilizing the finite volume method. In this study, the sample used was a 3D image from random tight packing of spheres (beadpack) with a size of 250×250×250 voxels and a porosity of 0.36. Variation in grain size is carried out by upscaling the 3D image sample, so that this treatment affects the specific surface area value but does not change the porosity and tortuosity of the sample. Several variations of grain

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13

Chen, Hengyi, Conghua Lu, Caiyu Lin, et al. "VPS34 suppression reverses osimertinib resistance via simultaneously inhibiting glycolysis and autophagy." Carcinogenesis 42, no. 6 (2021): 880–90. http://dx.doi.org/10.1093/carcin/bgab030.

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Abstract Autophagy and glycolysis are associated with osimertinib resistance. The energy complement and dynamic balance between these two processes make it difficult to block the process of drug resistance; breaking the complementary relationship between them may effectively overcome drug resistance. However, the exact mechanisms and the key players for regulating autophagy and glycolysis remain unclear. In this study, we demonstrate that autophagy and glycolysis levels in osimertinib-resistant cells were markedly higher than parental cells, and a dynamic balance existed between them. Inhibiti

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14

Graciano-Uribe, Jonathan, Toni Pujol, Jaume Puig-Bargués, Miquel Duran-Ros, Gerard Arbat, and Francisco Ramírez de Cartagena. "Assessment of Different Pressure Drop-Flow Rate Equations in a Pressurized Porous Media Filter for Irrigation Systems." Water 13, no. 16 (2021): 2179. http://dx.doi.org/10.3390/w13162179.

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The small open area available at the slots of underdrains in pressurized granular bed filters for drip irrigation implies: (1) the existence of a region with non-uniform flow, and (2) local values of modified particle Reynolds number >500. These flow conditions may disagree with those accepted as valid for common pressure drop-flow rate correlations proposed for packed beds. Here, we carried out detailed computational fluid dynamics (CFD) simulations of a laboratory filter to analyze the results obtained with five different equations of head losses in porous media: (1) Ergun, (2) Darcy-Forc

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15

Madeo, Angela, Patrizio Neff, Elias C. Aifantis, Gabriele Barbagallo, and Marco Valerio d’Agostino. "On the role of micro-inertia in enriched continuum mechanics." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 473, no. 2198 (2017): 20160722. http://dx.doi.org/10.1098/rspa.2016.0722.

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In this paper, the role of gradient micro-inertia terms η ¯ ∥ ∇ u , t ∥ 2 and free micro-inertia terms η ∥ P , t ∥ 2 is investigated to unveil their respective effects on the dynamic behaviour of band-gap metamaterials. We show that the term η ¯ ∥ ∇ u , t ∥ 2 alone is only able to disclose relatively simplified dispersive behaviour. On the other hand, the term η ∥ P , t ∥ 2 alone describes the full complex behaviour of band-gap metamaterials. A suitable mixing of the two micro-inertia terms allows us to describe a new feature of the relaxed-micromorphic model, i.e. the description of a second

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16

Lalremmawia, H., and Basant K. Tiwary. "Identification of molecular biomarkers for ovarian cancer using computational approaches." Carcinogenesis 40, no. 6 (2019): 742–48. http://dx.doi.org/10.1093/carcin/bgz025.

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Abstract Ovarian cancer is one of the major causes of mortality among women. This is partly because of highly asymptomatic nature, lack of reliable screening techniques and non-availability of effective biomarkers of ovarian cancer. The recent availability of high-throughput data and consequently the development of network medicine approach may play a key role in deciphering the underlying global mechanism involved in a complex disease. This novel approach in medicine will pave the way in translating the new molecular insights into an effective drug therapy applying better diagnostic, prognost

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17

Ghanbari Motlagh, Mohadeseh, Sasan Babaie Kafaky, Asadollah Mataji, Reza Akhavan, and Behzad Amraei. "An introduction to the distribution of carbon stocks in temperate broadleaf forests of northern Iran." Journal of Forest Science 66, No. 2 (2020): 70–79. http://dx.doi.org/10.17221/149/2019-jfs.

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Northern forests of Iran are among the most important plant communities in Iran due to their dynamic and diverse vegetation composition and fertile soils. There is little information about carbon stocks of these forests. In the present study, above- and belowground carbon stocks of trees, litter, herbs and soil organic carbon stock at three selected sites of these forests were calculated using random plots and non-destructive sampling. The FAO method was used for carbon estimation of trees and Walkley-Black method was used for soil carbon stock and carbon coefficient was estimated directly. Th

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18

Dr., Tapati Sarmah. "Exploring the Intersection of Sustainability and Cultural Dynamics in the UAE Fashion Industry: A Literary Review." International Journal of Management and Humanities (IJMH) 11, no. 4 (2024): 33–45. https://doi.org/10.35940/ijmh.D1774.11041224.

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<strong>Abstract: </strong>This study investigates the barriers and challenges to adopting sustainable practices in the UAE fashion industry through the lens of Institutional Theory. Employing secondary research and a thematic analysis approach, the study identifies critical themes such as supply chain transparency, green raw material sourcing, energy-efficient manufacturing, waste management, and inclusive labor practices. Findings reveal that sustainability efforts are hindered by regulatory gaps, consumer skepticism, high costs, and limited accessibility to eco-friendly resources. Despite g

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19

Todeschini, Isabele, Emílio Mercuri, Steffen Noe, Ulrich Norbisrath, and Matevž Zorec. "Photoacoustic CO2 sensor collocation method at SMEAR Estonia." ARPHA Conference Abstracts 8 (May 28, 2025): e151382. https://doi.org/10.3897/aca.8.e151382.

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The research project aims to develop and install environmental monitoring systems in hemi-boreal ecosystems, utilizing low-cost technologies and artificial intelligence (AI). The proposal integrates sensors to measure atmospheric CO2 by the collocation method, calibration and analysis methods are based on machine learning.The initiative seeks to understand atmospheric dynamics in forests (Järvselja Experimental Forest, Estonia), evaluating carbon responses to environmental changes. The systems are field-calibrated using certified reference equipment and enhanced with AI models, such as Random

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20

Blakemore. "Biotic SOC Stock: What We Had & What We Lost." Veop 6 (April 13, 2023): 1–59. https://doi.org/10.5281/zenodo.7825446.

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<strong>Abstract: </strong>Land’s basic metric is soil organic carbon (SOC) yet global estimates range 1,417–15,000 Gt C. Erosion of ancient topsoil and loss of soil taxa are most urgent of all context-triage concerns, and most ignored. Re-evaluation of topographical terrain on a non-flat Earth increases most soil dynamic inventories. Carbon credits of our neglected and disappearing SOC stocks are enumerated for mineral soils (~4,100 Gt C plus ca. 20–30% glomalin), Permafrost (>4,200 Gt C), peat (1,123 Gt C), plant roots (916 Gt C), litter (600 Gt C), microbes (200 Gt C),

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21

Telesh, Irena V. "Small details of big importance: Carbon mass determination in the invasive cladoceran Cercopagis pengoi (Ostroumov, 1891) by the high temperature combustion method." NeoBiota 33 (January 27, 2017): 19–32. https://doi.org/10.3897/neobiota.33.9823.

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Carbon mass of the non-indigenous predatory fishhook water flea Cercopagis pengoi (Ostroumov, 1891) from the eastern Gulf of Finland, the Baltic Sea, was for the first time measured using the high temperature combustion method. Prior to the analysis, individual dry weight of Cercopagis was determined; altogether ca. 500 organisms were examined. Mean individual dry weight of C. pengoi for July-September was estimated as 34.0 µg; carbon mass averaged 15.8 µg; carbon content, calculated as percent of dry weight, averaged 43.4%. Those values varied over months, mainly because of different populati

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22

Saleem, S. "Power, Politics, and Public Health: Understanding the Role of Healthcare Expenditure in Shaping Health Outcomes in Pakistan for Policy Enhancement." Politica 2, no. 1 (2023): 58–72. https://doi.org/10.5281/zenodo.8127367.

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Power dynamics and political structures play a significant role in determining resource allocation, policy decisions, and health outcomes in public health. The main purpose of this research is to analyze the impact of healthcare spending on health outcomes in Pakistan between 2002 and 2021. Government spending on education, existing health expenses, carbon emissions, illness prevalence (both infectious and non-infectious), and the availability of doctors are only a few of the issues investigated. The health outcomes are measured by the percentage of infants who die before their fifth birthday.

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23

Xue, Yang, Wei-Sheng Song, Hong-Tao Miao, Jing Wang, and Yu Li. "Multi-Objective Optimal Design of Dropping Shock of Series Cushioning Packaging System." Shock and Vibration 2022 (March 25, 2022): 1–15. http://dx.doi.org/10.1155/2022/9491102.

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The product bears the shock load during the circulation process. The cushioning materials need to absorb the energy generated during the shock to prevent damage to the product. The cushion packaging system generally consists of products, cushioning materials, and an outside packaging carton. Therefore, it is necessary to study the factors affecting the cushion performance of the system. This paper adopts a BP neural network to develop a more precise constitutive relationship. Based on the trained constitutive network model, the dynamic equation of the system is established, and the Runge-Kutta

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24

Fotelli, Mariangela, Christodoulos Sazeides, –. Frantzi Evdoxia Bintsi, et al. "Disentangling the effect of stand structure on the C-balance of Mediterranean Pine forests using a process-based forest model." ARPHA Conference Abstracts 8 (May 28, 2025): e151213. https://doi.org/10.3897/aca.8.e151213.

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Adaptive management of Mediterranean pine forests can contribute towards carbon farming and fire protection, under current global change conditions. Local scale process-based forest models can be used to identify the optimum stand structure for this dual aim. For this purpose, we established a monitoring network within the PineOptim project, which includes two Calabrian pine (<em>Pinus brutia</em> Ten.) and one Aleppo pine (<em>Pinus halepensis</em> Mill.) forests in Greece, differing in stand structure due to the applied management priorities and natural post-fire dynamics. Thus, at the Alepp

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25

Melnik, AL, VV Kazmіrchuk, TM Nosalska, et al. "PHARMACOLOGICAL RESEARCH OF THE DENTAL GEL WITH CARBON DIOXIDE HUMULUS LUPULUS EXTRACT." Annals of Mechnikov Institute, no. 1 (March 20, 2017): 62–66. https://doi.org/10.5281/zenodo.401073.

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Introduction. In contemporary pharmaceutical practice among drugs used in dental gels are most effective, that are easily applied to the mucous and long held on the gums to form a protective film and prolonging therapeutic effect. Therefore it developed a new drug with a carbon dioxide Humulus Lupulus extract antimicrobial action in gel form for treatment of the oral cavity. The aim of our study was to investigate the acute and subacute toxicity the gel containing 0.5 % carbon dioxide Humulus lupulus extract. The toxicity of the gel studied at the intragastric route of administration, due to t

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Muccioli, S. E., L. Hidalgo-García, L. Erkert, et al. "DOP111 Lack of epithelial RhoA in the gut, a new colitis-associated cancer experimental model." Journal of Crohn's and Colitis 19, Supplement_1 (2025): i285. https://doi.org/10.1093/ecco-jcc/jjae190.0150.

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Abstract Background The small GTPase RhoA controls cytoskeleton dynamics in various cell types, including intestinal epithelial cells (IECs). Accordingly, we have shown that lack of RhoA in IECs in mice increases intestinal permeability and inflammation1. However, its role in cancer is controversial. While classically recognized as a potential colorectal cancer (CRC) biomarker2, RhoA inactivation was found to increase Wnt signalling and tumor risk in mouse small intestinal epithelium3. Additionally, proteins in the RhoA/Rac1 pathway were identified as highly mutated in human colitis-associated

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27

Shehzad, Sofia. "DENGUE OUTBREAK -IS THE PANIC JUSTIFIED ?" Journal of Gandhara Medical and Dental Science 4, no. 1 (2018): 1. http://dx.doi.org/10.37762/jgmds.4-1.224.

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In this era of startling developments in the medical field there remains a serious worry about the hazardous potential of various by products which if not properly addressed can lead to consequences of immense public concern. Hospitals and other health care facilities generate waste products which are evidently hazardous to all those exposed to its potentially harmful effects. Need for effective legislation ensuring its safe disposal is supposed to be an integral part of any country's health related policy. This issue is of special importance in developing countries like Pakistan which in spit

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Shehzad, Sofia. "DENGUE OUTBREAK -IS THE PANIC JUSTIFIED ?" Journal of Gandhara Medical and Dental Science 4, no. 1 (2018): 1. http://dx.doi.org/10.37762/jgmds.4-1.224.

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In this era of startling developments in the medical field there remains a serious worry about the hazardous potential of various by products which if not properly addressed can lead to consequences of immense public concern. Hospitals and other health care facilities generate waste products which are evidently hazardous to all those exposed to its potentially harmful effects. Need for effective legislation ensuring its safe disposal is supposed to be an integral part of any country's health related policy. This issue is of special importance in developing countries like Pakistan which in spit

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29

Mládek, Arnošt, Václav Gerla, Petr Šeba, et al. "From head micro-motions towards CSF dynamics and non-invasive intracranial pressure monitoring." Scientific Reports 11, no. 1 (2021). http://dx.doi.org/10.1038/s41598-021-93740-5.

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AbstractContinuous monitoring of the intracranial pressure (ICP) is essential in neurocritical care. There are a variety of ICP monitoring systems currently available, with the intraventricular fluid filled catheter transducer currently representing the “gold standard”. As the placement of catheters is associated with the attendant risk of infection, hematoma formation, and seizures, there is a need for a reliable, non-invasive alternative. In the present study we suggest a unique theoretical framework based on differential geometry invariants of cranial micro-motions with the potential for co

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Bergshoeff, Eric, José Figueroa-O'Farrill, and Joaquim Gomis. "A non-lorentzian primer." SciPost Physics Lecture Notes, May 31, 2023. http://dx.doi.org/10.21468/scipostphyslectnotes.69.

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We review both the kinematics and dynamics of non-lorentzian theories and their associated geometries. First, we introduce non-lorentzian kinematical spacetimes and their symmetry algebras. Next, we construct actions describing the particle dynamics in some of these kinematical spaces using the method of nonlinear realisations. We explain the relation with the coadjoint orbit method. We continue discussing three types of non-lorentzian gravity theories: Galilei gravity, Newton-Cartan gravity and Carroll gravity. Introducing matter, we discuss electric and magnetic non-lorentzian field theories

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31

Lambert, Neil, and Joseph Smith. "Non-relativistic intersecting branes, Newton-Cartan geometry and AdS/CFT." Journal of High Energy Physics 2024, no. 7 (2024). http://dx.doi.org/10.1007/jhep07(2024)224.

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Abstract We discuss non-relativistic variants of four-dimensional $$ \mathcal{N} $$ N = 4 super-Yang-Mills theory obtained from generalised Newton-Cartan geometric limits of D3-branes in ten-dimensional spacetime. We argue that the natural interpretation of these limits is that they correspond to non-relativistic D1-branes or D3-branes intersecting the original D3-branes. The resulting gauge theories have dynamics that reduce to quantum mechanics on monopole moduli space or two-dimensional sigma-models on Hitchin moduli space respectively. We show that these theories possess interesting infini

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32

Iosifidis, Damianos, Ioannis Georgios Vogiatzis, and Christos G. Tsagas. "Friedmann-like universes with non-metricity." European Physical Journal C 83, no. 3 (2023). http://dx.doi.org/10.1140/epjc/s10052-023-11313-4.

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AbstractWe study the potential effects of spacetime non-metricity in cosmology. In the spirit of Einstein–Cartan gravity, but with non-metricity replacing torsion, we consider the Einstein–Hilbert action and assume zero torsion. Adopting certain hyperfluid models, with non-vanishing hypermomentum that can source spacetime non-metricity, we add a matter component into the action and derive the field equations, along with the conservation laws. Applying our formulae to cosmology, we generalize the Friedmann and the Raychaudhuri equations in the presence of non-metricity. Our results show that, i

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33

Hartong, Jelle, and Emil Have. "Non-relativistic expansion of open strings and D-branes." Journal of High Energy Physics 2024, no. 9 (2024). http://dx.doi.org/10.1007/jhep09(2024)087.

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Abstract We expand the relativistic open bosonic string in powers of 1/c2 where c is the speed of light. We perform this expansion to next-to-leading order in 1/c2 and relate our results to known descriptions of non-relativistic open strings obtained by taking limits. Just as for closed strings the non-relativistic expansion is well-defined if the open string winds a circle in the target space. This direction must satisfy Dirichlet boundary conditions. It is shown that the endpoints of the open string behave as Bargmann particles in the non-relativistic regime. These open strings end on nrDp-b

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Bergshoeff, Eric A., Giacomo Giorgi, and Luca Romano. "From relativistic gravity to the Poisson equation." Journal of High Energy Physics 2025, no. 2 (2025). https://doi.org/10.1007/jhep02(2025)015.

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Abstract We consider the non-relativistic limit of general relativity coupled to a (p+1)-form gauge field and a scalar field in arbitrary dimensions and investigate under which conditions this gives rise to a Poisson equation for a Newton potential describing Newton-Cartan gravity outside a massive p-dimensional extended object, a so-called p-brane. Given our Ansatz, we show that not all the p-branes satisfy the required conditions. We study theories whose dynamics is defined by a Lagrangian as well as systems that are defined by a set of equations of motion not related to a Lagrangian. We sho

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Nguyen, Ngoc Dung, and Thomas Pabst. "Numerical Study of Consolidation of Slurry Tailings Considering Continuous Update of Material Properties." Geotechnical and Geological Engineering, February 2, 2024. http://dx.doi.org/10.1007/s10706-023-02727-8.

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AbstractExplicitly modelling tailings consolidation behaviour contributes to improve integrated management approaches and accurately estimate the storage capacity of tailings storage facilities (TSFs) to better predict their static and dynamic stability. However, slurry tailings demonstrate a highly non-linear evolution of stiffness and hydraulic conductivity during consolidation, thus significantly complexifying the determination of their hydromechanical properties. In this study, an approach to update Mohr Coulomb parameters and simulate the continuous evolution of hydraulic conductivity and

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Liu, Qiuyan, Liuqun Dong, and Genli Tang. "Molecular Dynamics Simulation and Lab‐Scale Experimental Testing of Water Migration in Unsaturated Expansive Clay." International Journal for Numerical and Analytical Methods in Geomechanics, June 28, 2025. https://doi.org/10.1002/nag.70004.

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ABSTRACTThe mechanical performances of expansive clay in semi‐arid areas deteriorate with the change in humidity and temperature due to its characteristics of water‐swelling and drying shrinkage. So, investigating the moisture migration in expansive clays is of great significance. This study employs molecular dynamics (MD) simulations to elucidate microscale water transport mechanisms in clay mineral pores, complemented by experimental validation using a novel horizontal migration apparatus across temperature gradients (5°C, 20°C, 40°C). Quantitative analysis reveals that temperature significa

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Sabet, Safa, and Murat Barisik. "Macroscopic modeling of gas permeability in hierarchical micro/nanoporous media: A unified characterization of rarefaction using Klinkenberg theory and equivalent diameter." Physics of Fluids 36, no. 9 (2024). http://dx.doi.org/10.1063/5.0231134.

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Estimating gas transport through a hierarchical micro/nanoporous system is challenging due to non-equilibrium gas dynamics. The primary difficulty lies in determining the rarefaction level, because identifying a representative flow dimension in a complex porous system with multiple pore scales is not straightforward. Our study performed a pore-level analysis for gas permeability in dual-scale porous media with varying porosity, throat size, and secondary pore size under different rarefaction conditions. We found that secondary porosity negatively affects permeability due to increased friction

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Maurizio, Arena, Viscardi Massimo, Barra Giuseppina, Vertuccio Luigi, and Guadagno Liberata. "Multifunctional Performance of a Nano-Modified Fiber Reinforced Composite Aeronautical Panel." March 15, 2019. https://doi.org/10.3390/ma12060869.

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The adoption of multifunctional flame-resistant composites is becoming increasingly attractive for many components of aircrafts and competition cars. Compared to conventional alloy solutions, the reduced weight and corrosion resistance are only a couple of the relevant advantages they can offer. In this paper, a carbon fiber reinforced panel (CFRP) was impregnated with an epoxy resin enhanced using a combination of 0.5 wt% of carbon nanotubes (CNTs) and 5 wt% of Glycidyl-Polyhedral Oligomeric Silsesquioxanes (GPOSS). This formulation, which is peculiar to resins with increased electrical condu

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Luo, Jinguang, Huaixiang Tao, Long Chen, Hao Hu, Likai Mao, and Han Guan. "LncRNA MEG3 Suppresses Prostate Cancer Progression by Mediating Macrophage Polarization via the miR-148a-3p/ARRDC3 Signaling Axis." Carcinogenesis, February 27, 2025. https://doi.org/10.1093/carcin/bgaf009.

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Abstract Long-chain non-coding RNA (LncRNA) MEG3 significantly influences tumor microenvironment (TME) dynamics and macrophage polarization. However, its specific involvement in prostate cancer (PCa) progression remains unclear. MEG3 exhibited low expression in PCa, and immune infiltration analysis revealed a positive association with M1 macrophages infiltration and a negative association with M2 macrophages infiltration. Immunohistochemical analysis demonstrated increased MEG3 levels, corresponding with upregulated INOS (an M1 marker) and downregulated CD163 (an M2 marker). MEG3 expression wa

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Owens, Gemma L., Chloe E. Barr, Holly White, Kelechi Njoku, and Emma J. Crosbie. "Urinary biomarkers for the detection of ovarian cancer: A systematic review." Carcinogenesis, February 15, 2022. http://dx.doi.org/10.1093/carcin/bgac016.

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Abstract Currently, the only definitive method for diagnosing ovarian cancer involves histological examination of tissue obtained at time of surgery or by invasive biopsy. Blood has traditionally been the biofluid of choice in ovarian cancer biomarker discovery; however, there has been a growing interest in exploring urinary biomarkers, particularly as it is non-invasive. In this systematic review, we present the diagnostic accuracy of urinary biomarker candidates for the detection of ovarian cancer. A comprehensive literature search was performed using the MEDLINE/PubMed and EMBASE, up to 1 s

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Bireswar, Paul, and Datta Amitava. "Existence of Nano-Organic Carbon Particles below the Size Range of 10 nm in the Indoor Air Environment." June 2, 2017. https://doi.org/10.5281/zenodo.1131329.

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Indoor air environment is a big concern in the last few decades in the developing countries, with increased focus on monitoring the air quality. In this work, an experimental study has been conducted to establish the existence of carbon nanoparticles below the size range of 10 nm in the non-sooting zone of a LPG/air partially premixed flame. Mainly, four optical techniques, UV absorption spectroscopy, fluorescence spectroscopy, dynamic light scattering and TEM have been used to characterize and measure the size of carbon nanoparticles in the sampled materials collected from the inner surface o

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Watson, Robert. "E-Press and Oppress." M/C Journal 8, no. 2 (2005). http://dx.doi.org/10.5204/mcj.2345.

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   From elephants to ABBA fans, silicon to hormone, the following discussion uses a new research method to look at printed text, motion pictures and a teenage rebel icon. If by ‘print’ we mean a mechanically reproduced impression of a cultural symbol in a medium, then printing has been with us since before microdot security prints were painted onto cars, before voice prints, laser prints, network servers, record pressings, motion picture prints, photo prints, colour woodblock prints, before books, textile prints, and footprints. If we accept that higher mammals such as elepha

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