cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Conviviality in urban neighborhoods: an experience of social interactions in urban space
Creators: name: Hosseini, Ali
name: San Vansan, Norika Yolyeh
name: Heydari, Asghar
name: Afsari, Rasoul
name: Goharkhah, Fatemeh
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Neuroscience
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences

description: Urban spaces should serve as collective arenas that facilitate social and human interactions, which are fundamental to human life. This study explores space conviviality in a neighbourhood marked by planned layouts in Tehran, defined as environments that encourage spontaneous gatherings and meaningful connections among residents, thereby nurturing community and belonging. The research reveals a generally positive level of space conviviality, with higher social interaction linked to better conviviality. Key factors contributing to this include well-planned neighbourhoods with mixed-use zoning, walkability, and accessible public spaces, with walkability identified as the most significant factor enhancing both pedestrian movement and the neighbourhood’s vibrancy and safety. The findings emphasise the importance of a holistic approach to urban planning and urge planners and policymakers to integrate various elements that promote social interaction and conviviality to create more engaging urban spaces.
Modelling Temperature Variation of Mushroom Growing Hall Using Artificial Neural Networks
Creators: name: Ardabili, Sina
name: Mosavi, Amir
name: Mahmoudi, Asghar
name: Gundoshmian, Tarahom Mesri
name: Nosratabadi, Saeed
name: Varkonyi-Koczy, Annamaria R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: The recent developments of computer and electronic systems have made the use of intelligent systems for the automation of agricultural industries. In this study, the temperature variation of the mushroom growing room was modeled by multi-layered perceptron and radial basis function networks based on independent parameters including ambient temperature, water temperature, fresh air and circulation air dampers, and water tap. According to the obtained results from the networks, the best network for MLP was in the second repetition with 12 neurons in the hidden layer and in 20 neurons in the hidden layer for radial basis function network. The obtained results from comparative parameters for two networks showed the highest correlation coefficient (0.966), the lowest root mean square error (RMSE) (0.787) and the lowest mean absolute error (MAE) (0.02746) for radial basis function. Therefore, the neural network with radial basis function was selected as a predictor of the behavior of the system for the temperature of mushroom growing halls controlling system.
Additional file 1 of Uterine metabolic disorder induced by silica nanoparticles: biodistribution and bioactivity revealed by labeling with FITC
Creators: name: Shuyin Duan
name: Meihua Zhang
name: Junxia Li
name: Jiaqi Tian
name: Haoyu Yin
name: Xietong Wang
name: Zhang, Lin
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1. Figure S1. XRD pattern of silica nanoparticles. XRD, X-ray diffraction. Figure S2. Expression (A) and comparison of p17 and p19 (B & C) between trophoblasts with different interventions. Figure S3. Dual staining of uterine macrophage and cytokines. The macrophage was stained with F4/80 antibody in red, the cytokines were labeled with TNF-α, TGF-β, and IL-1β antibodies in green, and the nuclei were stained with DAPI in blue. The relative distribution of macrophage and cytokines were visualized in the merged and enlarged panels. Figure S4. Venn diagram exhibiting the dysregulated genes associated with inflammation. DEGs, differentially expressed genes. MAPK, Mitogen-activated protein kinase 1. JAK, Janus kinase. NF-κB, Nuclear factor-κB. Figure S5. Pipeline of the high throughput sequencing and bioinformatics analysis. Table S1. Hydrodynamic size, zeta potential, and polydispersity index of SiNP and FITC-SiNP measured by DLS in ultrapure water and DMEM with 10�S. Table S2. The Differentially Expressed Genes in Trophoblast Exposed to Silica Nanoparticles. Table S3. Signaling Pathway Enrichment Analysis for Dysregulated Genes in Trophoblast Exposed to Silica Nanoparticles.
Unavoidable emergent biaxiality in chiral molecular-colloidal hybrid liquid crystals
Creators: name: Wu, Jin-Sheng
name: Lazaro, Marina Torres
name: Ghosh, Souvik
name: Mundoor, Haridas
name: Wensink, Henricus H.
name: Smalyukh, Ivan I.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Chiral nematic or cholesteric liquid crystals (LCs) are mesophases with long-ranged orientational order featuring a quasi-layered periodicity imparted by a helical configuration but lacking positional order. Doping molecular cholesteric LCs with thin colloidal rods with a large length-to-width ratio or disks with a large diameter-to-thickness ratio adds another level of complexity to the system because of the interplay between weak surface boundary conditions and bulk-based elastic distortions around the particle-LC interface. By using colloidal disks and rods with different geometric shapes and boundary conditions, we demonstrate that these anisotropic colloidal inclusions exhibit biaxial orientational probability distributions, where they tend to orient with the long rod axes and disk normals perpendicular to the helix axis, thus imparting strong local biaxiality on the hybrid cholesteric LC structure. Unlike the situation in achiral hybrid molecular-colloidal LCs, where biaxial order emerges only at modest to high volume fractions of the anisotropic colloidal particles, the orientational probability distribution of colloidal inclusions immersed in chiral nematic hosts are unavoidably biaxial even at vanishingly low particle volume fractions. In addition, the colloidal inclusions induce local biaxiality in the molecular orientational order of the LC host medium, which enhances the weak biaxiality of the LC in a chiral nematic phase coming from the symmetry breaking caused by the presence of the helical axis. With analytical modeling and computer simulations based on minimizing the Landau de Gennes free energy of the host LC around the colloidals, we explain our experimental findings and conclude that the biaxial order of chiral molecular-colloidal LCs is strongly enhanced as compared to both achiral molecular-colloidal LCs and molecular cholesteric LCs and is rather unavoidable.
description: 27 pages, 14 figures
The Evolution of Magellanic-like Galaxy Pairs and The Production of Magellanic Stream Analogues in Simulations with Tides, Ram Pressure, and Stellar Feedback
Creators: name: Williamson, David
name: Martel, Hugo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a series of chemodynamical simulations of Magellanic-like systems consisting of two interacting, equal-mass dwarf galaxies orbiting a massive host galaxy, including feedback and star formation, tides, and ram pressure. We study the star formation and chemical enrichment history of the dwarfs, and the production of a Magellanic Stream analogue. The dwarfs interact with each other through tidal forces, distorting their morphologies and triggering star formation. A stream is naturally produced as outflows, induced by feedback and interactions, are stretched by tidal forces. Counter to some recent simulations, we find that the leading arm persists even in the presence of ram pressure from the host galaxy. Interactions between the dwarfs and the host galaxies produce multiple kinematic components in the stream, as observed. A combination of ongoing star-formation and entrained low-metallicity gas causes the stream to have a complex chemical structure, with an average metallicity that is generally lower than that of the dwarfs.
description: Accepted to ApJ
Spin 1/2 Fermions in the Unitary Regime at Finite Temperature
Creators: name: Bulgac, Aurel
name: Drut, Joaquin E.
name: Magierski, Piotr
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We have performed a fully non-perturbative calculation of the thermal properties of a system of spin 1/2 fermions in 3D in the unitary regime. We have determined the critical temperature for the superfluid-normal phase transition. The thermodynamic behavior of this system presents a number of unexpected features, and we conclude that spin 1/2 fermions in the BCS-BEC crossover should be classified as a new type of superfluid.
description: 6 pages, 2 figures, version for the Proceedings of QMBT13
Pharmacokinetics, metabolism, placental transfer and fetal effects of Valproic acid in pregnant sheep
Creators: name: Gordon, John David
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of these studies was to assess the pharmacokinetics, metabolism and fetal effects of valproic acid (VPA) in pregnant sheep. Following i.v. bolus administration, the disposition of VPA was best described by a biexponential function with a t½β of 2.13 ± 0.49 h in maternal serum and 3.37 ± 1.37 h in fetal serum. The total body clearances (CLT) for the ewe and fetus were 0.083 ± 0.027 Lh⁻¹ kg⁻¹ and 0.529 ± 0.306 Lh⁻¹ kg⁻¹ , respectively. Significant fetal exposure to VPA was observed following maternal dosing (AUC∞FA / AUC∞¹¹MA of 0.410 ± 0.118). VPA appeared rapidly in amniotic and fetal tracheal fluids but did not accumulate extensively in either. 11 VPA metabolites were detected following i.v. bolus dosing. The metabolite levels in maternal serum were consistently higher than fetal levels irrespective of the site of drug administration. Simultaneous i.v. infusion studies were also performed achieving steadystate concentration ratios of VPA and [¹³C₄]VPA in fetal serum to that in maternal serum (i.e., Cfss / Cmss) of 0.55 ± 0.11 and 1.90 ± 0.38, respectively. Maternal (CLm) and fetal (CLf) total body clearances were 3.6 ± 0.9 mL min⁻¹ kg⁻¹ maternal weight and 63.0 ± 22.8 mL min⁻¹ kg⁻¹ fetal weight. Of these values, the maternal nonplacental clearance contributed approximately 69 % of the CLm while the fetal nonplacental clearance (CLfo) apparently made no contribution to CLf. The maternal renal clearance, 0.521 ± 0.071 mL min⁻¹ kg⁻¹ maternal weight, accounts for approximately 20 % of the total maternal nonplacental clearance (CLmo). In contrast, there was essentially no renal excretion of VPA from the fetus. Metabolite data suggests that [¹³C₄]VPA undergoes transfer to the ewe followed by metabolism, with the resulting labelled metabolites being transferred back to the fetus. This data further supports the apparent lack of fetal nonplacental clearance of VPA. The most significant physiological effect of the administration of VPA was a decrease in fetal breathing activity although other transient cardiovascular effects were noted in the infusion studies.
title: ÐÐ¾Ð³Ð½Ð¸ÑÐ¸Ð²Ð½Ð¾Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¾Ð¼ÑÑÐ»ÐµÐ½Ð½Ð¾ÑÑÐ¸ ÑÐ³Ð° Ð Ð¾ÑÑÐ¸Ð¸ Ð² ÑÐ°Ð¼ÐºÐ°Ñ Ð¼Ð°ÐºÑÐ¾Ð¼Ð¾Ð´ÐµÐ»Ð¸ ÑÐµÐ³Ð¸Ð¾Ð½Ð°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð²Ð·Ð°Ð¸Ð¼Ð¾Ð´ÐµÐ¹ÑÑÐ²Ð¸Ñ ÐÑÐ°Ð½Ð±ÐµÑÐ³Ð°
title: Cognitive modeling of industry in the Southern of Russia within the framework of the Granberg macro-model of regional interaction
Creators: name: ÐÐ°ÐºÐ°ÑÐµÐ½Ñ, Ð¢Ð°ÑÑÑÐ½Ð°
name: ÐÐ°Ð»Ð¸Ð½Ð¸ÑÐµÐ½ÐºÐ¾, ÐÐ»ÐµÐºÑÐµÐ¹
name: ÐÐ°Ð½Ð½Ð°Ð° ÐÐ»Ð¸ CÐ°Ð¶Ð¸
name: ÐÐµÑÑÐµÐ½ÐºÐ¾, Ð¡Ð²ÐµÑÐ»Ð°Ð½Ð°
name: "Ð¡Ð¸ÑÑÐµÐ¼Ð½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð· Ð² Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ð¸ Ð¸ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ð¸", Ð¼ÐµÐ¶Ð´ÑÐ½Ð°ÑÐ¾Ð´Ð½Ð°Ñ Ð½Ð°ÑÑÐ½Ð¾-Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ°Ñ ÐºÐ¾Ð½ÑÐµÑÐµÐ½ÑÐ¸Ñ (27; 2023; Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³)
Publisher: name: ÐÐÐÐÐ¢ÐÐ¥-ÐÐ ÐÐ¡Ð¡
Year: 2024
Subjects: ÐÑÐ¾Ð¼ÑÑÐ»ÐµÐ½Ð½ÑÐµ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ
ÐÐ°ÑÐµÐ¼Ð°ÑÐ¸ÑÐµÑÐºÐ¾Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
Ð¼Ð°ÐºÑÐ¾Ð¼Ð¾Ð´ÐµÐ»Ñ
Ð¼Ð¾Ð´ÐµÐ»Ñ ÐÑÐ°Ð½Ð±ÐµÑÐ³Ð°
ÑÐµÐ³Ð¸Ð¾Ð½Ð°Ð»ÑÐ½Ð¾Ðµ Ð²Ð·Ð°Ð¸Ð¼Ð¾Ð´ÐµÐ¹ÑÑÐ²Ð¸Ðµ
macromodel
Granberg model
regional interaction

description: ÐÐ°Ð½Ð½Ð°Ñ ÑÑÐ°ÑÑÑ Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ°Ð¼ ÐºÐ¾Ð³Ð½Ð¸ÑÐ¸Ð²Ð½Ð¾Ð³Ð¾ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ Ð¿ÑÐ¾Ð¼ÑÑÐ»ÐµÐ½Ð½Ð¾Ð³Ð¾ ÐºÐ¾Ð¼Ð¿Ð»ÐµÐºÑÐ° Ð®Ð¶Ð½Ð¾Ð³Ð¾ ÑÐµÐ´ÐµÑÐ°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð¾ÐºÑÑÐ³Ð° Ñ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸ÐµÐ¼ Ð¼Ð°ÐºÑÐ¾Ð¼Ð¾Ð´ÐµÐ»Ð¸ ÑÐµÐ³Ð¸Ð¾Ð½Ð°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð²Ð·Ð°Ð¸Ð¼Ð¾Ð´ÐµÐ¹ÑÑÐ²Ð¸Ñ ÐÑÐ°Ð½Ð±ÐµÑÐ³Ð°. ÐÐ·ÑÑÐ°Ñ Ð·Ð° Ð¾ÑÐ½Ð¾Ð²Ñ Ð¼Ð°ÐºÑÐ¾Ð¼Ð¾Ð´ÐµÐ»Ñ ÑÐµÐ³Ð¸Ð¾Ð½Ð°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð²Ð·Ð°Ð¸Ð¼Ð¾Ð´ÐµÐ¹ÑÑÐ²Ð¸Ñ Ð¿Ð¾Ð·Ð²Ð¾Ð»ÑÐµÑ ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÑÑ Ð¿ÑÐ¾Ð¼ÑÑÐ»ÐµÐ½Ð½ÑÐ¹ ÐºÐ¾Ð¼Ð¿Ð»ÐµÐºÑ Ð² ÑÐ¸ÑÑÐµÐ¼Ðµ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¸Ñ Ð¸ Ð¸Ð½ÑÑÐ¸ÑÑÑÐ¸Ð¾Ð½Ð°Ð»ÑÐ½ÑÑ Ð²Ð·Ð°Ð¸Ð¼Ð¾ÑÐ²ÑÐ·ÐµÐ¹, Ð¿Ð¾Ð·Ð²Ð¾Ð»ÑÑÑÐ¸Ñ ÑÑÐ½ÐºÑÐ¸Ð¾Ð½Ð¸ÑÐ¾Ð²Ð°ÑÑ Ð¸ ÑÐ°Ð·Ð²Ð¸Ð²Ð°ÑÑÑÑ Ð¿ÑÐ¾Ð¼ÑÑÐ»ÐµÐ½Ð½Ð¾ÑÑÐ¸ ÑÐµÐ´ÐµÑÐ°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð¾ÐºÑÑÐ³Ð°.
description: This article presents the results of a cognitive study of the industrial complex of the Southern Federal District using Granberg macromodels of regional interconnection. The macromodel of regional interaction taken as a basis allows us to consider the industrial complex in a system of economic and institutional relationships that allows the functioning and development of industry in the federal district.
Fast logic with slow qubits: microwave-activated controlled-Z gate on low-frequency fluxoniums
Creators: name: Ficheux, Quentin
name: Nguyen, Long B.
name: Somoroff, Aaron
name: Xiong, Haonan
name: Nesterov, Konstantin N.
name: Vavilov, Maxim G.
name: Manucharyan, Vladimir E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We demonstrate a controlled-Z gate between capacitively coupled fluxonium qubits with transition frequencies $72.3~\textrm{MHz}$ and $136.3~\textrm{MHz}$. The gate is activated by a $61.6~\textrm{ns}$ long pulse at the frequency between non-computational transitions $|10\rangle - |20\rangle$ and $|11\rangle - |21\rangle$, during which the qubits complete only $4$ and $8$ Larmor periods, respectively. The measured gate error of $(8\pm1)\times 10^{-3}$ is limited by decoherence in the non-computational subspace, which will likely improve in the next generation devices. Although our qubits are about fifty times slower than transmons, the two-qubit gate is faster than microwave-activated gates on transmons, and the gate error is on par with the lowest reported. Architectural advantages of low-frequency fluxoniums include long qubit coherence time, weak hybridization in the computational subspace, suppressed residual $ZZ$-coupling rate (here $46~\mathrm{kHz}$), and absence of either excessive parameter matching or complex pulse shaping requirements.
Mechanisms governing the settling velocities and spatial distributions of inertial particles in wall-bounded turbulence
Creators: name: Bragg, Andrew D
name: Richter, David H
name: Wang, Guiquan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We use theory and Direct Numerical Simulations (DNS) to explore the average vertical velocities and spatial distributions of inertial particles settling in a wall-bounded turbulent flow. The theory is based on the exact phase-space equation for the Probability Density Function describing particle positions and velocities. This allowed us to identify the distinct physical mechanisms governing the particle transport. We then examined the asymptotic behavior of the particle motion near the wall, revealing the fundamental differences to the near wall behavior that is produced when incorporating gravitational settling. When the average vertical particle mass flux is zero, the averaged vertical particle velocity is zero away from the wall due to the particles preferentially sampling regions where the fluid velocity is positive, which balances with the downward Stokes settling velocity. When the average mass flux is negative, the combined effects of turbulence and particle inertia lead to average vertical particle velocities that can significantly exceed the Stokes settling velocity, by as much as ten times. Sufficiently far from the wall, the enhanced vertical velocities are due to the preferential sweeping mechanism. However, as the particles approach the wall, the contribution from the preferential sweeping mechanism becomes small, and a downward contribution from the turbophoretic velocity dominates the behavior. Close to the wall, the particle concentration grows as a power-law, but the nature of this power law depends on the particle Stokes number. Finally, our results highlight how the Rouse model of particle concentration is to be modified for particles with finite inertia.
Μοντελοποίηση διαδικασιών της περιφέρειας κεντρικής Μακεδονίας για την απόκτηση ελληνικής ιθαγενείας με την χρήση οντολογιών για σημασιολογικές υπηρεσίες ιστού.:
Creators: name: Χατζηπαρασκευά, Αρτεμισία Παύλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Πληροφορική
Οικονομικά
Διοίκηση
Computer science
Economically
Administration

description: Ο σκοπός της εργασίας είναι να διευκολύνει την καθημερινή συναλλαγή των υπαλλήλων στον δημόσιο φορέα με τους ενδιαφερόμενους πολίτες. Το λάθη που γίνονται στο δημόσιο τομέα λόγω του όγκου των εγγράφων και των διαδικασιών που συνήθως έχουν την τάση να μπερδεύουν τον πολίτη και όχι να τον βοηθάν και την αυτών είναι σημαντικά και έτσι θα προσπαθήσουμε να προτείνουμε κάποια λύση ‘ώστε να αποφύγουμε να συμβούν αυτά. Η διευκόλυνση των δημοσίων υπαλλήλων έχει πολλαπλά οφέλη για τους πολίτες. Θα γίνει μια μοντελοποίηση των διαδικασιών που αφορά κυρίως την απόκτηση ελληνικής ιθαγένειας για πολίτες που επιθυμούν να γίνουν έλληνες. Με την βοήθεια των Οντολογιών θα προσπαθήσουμε να αναπαραστήσουμε κάποιες διαδικασίες.
description: The aim of work is to facilitate the daily transaction of employees in the greek public institution with the interested citizens. Errors that become in the public sector because the volume of documents and processes that usually have the tendency to tangle the citizen and no to help him also these are important and thus we will try to propose some solution `so that we avoid happen these. The facilitation of public employees has multiple profits for the citizens. We will modeling a processes that concerns mainly the acquisition of Greek citizenship for citizens that wish become Greeks. And finally with the help of the Ontologies we will try to represent certain processes.
Εκτίμηση της αζωτούχου θρέψης των ποικιλιών επιτραπέζιας χρήσης Σουλτανίνα και Βικτώρια με τη χρήση των Μετρητών Χλωροφύλλης SPAD-502 και CCM-200:
Creators: name: Τοροσίδης, Ευστάθιος Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Αμπελος
Μετρητές χλωροφύλλης
Αζωτούχος θρέψη
Vitis vinifera
Chrolorphyll meters
Nitrogen status

description: Οικονομικοί , περιβαλλοντικοί και παράγοντες που σχετίζονται με την ασφάλεια τροφίμων επιβάλουν ότι η προσθήκη αζωτούχων λιπασμάτων πρέπει να γίνεται στις ποσότητες που είναι πραγματικά απαραίτητες. Η εφαρμογή των λιπασμάτων με ακρίβεια μπορεί να βελτιώσει την αποτελεσματικότητα τους μειώνοντας το επιπλέον κόστος για τους παραγωγούς και την επίδραση των απωλειών του αζώτου στο περιβάλλον. Τα τελευταία χρόνια επιστήμονες και παραγωγοί έχουν εστιάσει σε μεθόδους που βασίζονται στην άμεση ανάλυση των φυτών στο χωράφι για να καθορίσουν την άριστη ποσότητα αζωτούχου λιπάσματος των διαδοχικών λιπάνσεων. Η χρήση οπτικών μετρήσεων για τον υπολογισμό της αζωτούχου θρέψης στα φυτά με εκτίμηση του περιεχομένου τους σε χλωροφύλλη αποτελεί εξέλιξη των μεθόδων ανάλυσης των φυτών στον αγρό. Την αξιολόγηση δύο μετρητών χλωροφύλλης περιλαμβάνει η παρούσα εργασία. Διερευνήθηκε κατά πόσο είναι δυνατό να εκτιμηθεί η αζωτούχος θρέψη των επιτραπέζιων ποικιλιών της αμπέλου , Σουλτανίνα και Βικτώρια , με τη χρήση των μετρητών χλωροφύλλης SPAD-502 και CCM-200. Διαπιστώθηκαν σχέσεις μεταξύ των ενδείξεων των μετρητών και της συγκέντρωσης της χλωροφύλλης και του περιεχόμενου αζώτου όμως η ποσοτικοποίηση τους δεν ήταν εφικτή. Διαπιστώθηκε η αδυναμία των μετρητών να εκτιμούν με ακρίβεια τη συγκέντρωση της χλωροφύλλης όταν το περιεχόμενο της χρωστικής ξεπερνά τα 300 mg/m2.
description: Environmental, financial and factors related with food safety suggest that the addition of nitrogen fertilizers should be done in the amount that are really necessary. Applying fertilizers with accuracy could improve effectiveness, suppress the costs for producers and benefit the environment. During the last years, scientists and producers have focused to methods based in the field plant analysis. The use of optical measurements to assess the nitrogen status of the plants by estimating the chlorophyll content is one of these methods. The subject of this paper is the evaluation of two commercially available chlorophyll meters in the field. It was investigated if the chlorophyll meters SPAD-502 (Minolta) and CCM-200 (Opti-Science) are capable to estimate nitrogen status of two Vitis vinifera table grape cultivars, Soultanina and Victoria. Relations between the chlorophyll meters measurements and the chlorophyll and nitrogen content was established, but the quantification of these relations was not possible. Furthermore the decrease of the instrument accuracy when the chlorophyll content exceeds 300 mg/m2 was concluded as previous established.
Module identification in bipartite and directed networks
Creators: name: Guimera, R.
name: Sales-Pardo, M.
name: Amaral, L. A. N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Biological Physics (physics.bio-ph)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Modularity is one of the most prominent properties of real-world complex networks. Here, we address the issue of module identification in two important classes of networks: bipartite networks and directed unipartite networks. Nodes in bipartite networks are divided into two non-overlapping sets, and the links must have one end node from each set. Directed unipartite networks only have one type of nodes, but links have an origin and an end. We show that directed unipartite networks can be conviniently represented as bipartite networks for module identification purposes. We report a novel approach especially suited for module detection in bipartite networks, and define a set of random networks that enable us to validate the new approach.
Recovering Causal Structures from Low-Order Conditional Independencies
Creators: name: Wienöbst, Marcel
name: Liśkiewicz, Maciej
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: One of the common obstacles for learning causal models from data is that high-order conditional independence (CI) relationships between random variables are difficult to estimate. Since CI tests with conditioning sets of low order can be performed accurately even for a small number of observations, a reasonable approach to determine casual structures is to base merely on the low-order CIs. Recent research has confirmed that, e.g. in the case of sparse true causal models, structures learned even from zero- and first-order conditional independencies yield good approximations of the models. However, a challenging task here is to provide methods that faithfully explain a given set of low-order CIs. In this paper, we propose an algorithm which, for a given set of conditional independencies of order less or equal to $k$, where $k$ is a small fixed number, computes a faithful graphical representation of the given set. Our results complete and generalize the previous work on learning from pairwise marginal independencies. Moreover, they enable to improve upon the 0-1 graph model which, e.g. is heavily used in the estimation of genome networks.
https://zenodo.org/records/10449959
Creators: name: 1Normurodov Jamshit Baxshibek ugli -  teacher 2Yusupova Shaxzodabonu Shuhrat kizi – student Department of Economy Bukhara State University
Publisher: name: Zenodo
Year: 2024

description: In this article, the methods and global experiences of the fundamental improvement of tax administration in the conditions of the digital economy, the collection of taxes and other mandatory payments are highlighted. It is of particular importance to develop a strategy for improving tax administration, which includes the following goals, tasks and main directions. Improvement of the tax administration and liberalization of liability for violations of the law played an important role in improving the business environment.

 

Keywords. Tax system, economy, investment, production, finance, tax administration, tax burden, business, business activity.
ARNIKA (ARNICA MONTANA) O'SIMLIGIDAN EKSTRAKT OLISH VA UNING  TAHLILI
Creators: name: Mamatqulov, Z.U.
name: Sharipova, R.T.
Publisher: name: Zenodo
Year: 2024

description: Arnica montana (shuningdek, bo'rining o'ti deb ataladi) - Asteraceae romashka oilasiga tegishli bo'lgan va Yevropada keng tarqalgan katta sariq gullarga ega uzun bo'yli perineal o'simlik. Arnica montana gomeopatik tibbiyotda kichik og'iz dozalarida va past dozalarda og'riq, yallig'lanish va isitmani davolashda, ko'pincha operatsiyadan keyin yoki travmadan keyin qo'llaniladi. Bundan tashqari, an'anaviy ravishda yarani davolash, shishish, yallig'lanish, ko'karishlar va og'riqlar uchun topikal dori sifatida ishlatiladi. Biroq, uning og'iz orqali gomeopatik yoki topikal o'simlik terapiyasi sifatida samaradorligi haqida juda kam dalillar mavjud. Arnica montanani xavfli o't sifatida tasniflaydi va uni og'iz orqali ishlatishdan yoki so'rilishi mumkin bo'lgan singan teriga surtishdan ogohlantiradi. Arnica montana ekstraktlari in vitroda yallig'lanishga qarshi ta'sirga ega va mahalliy ravishda qo'llanilganda og'riq va shishish uchun foydali bo'lishi taxmin qilingan. Klinik tadqiqotlar uning yallig'lanish yoki og'riqlarga ta'sirini tasdiqlamadi. Arnica montana ko'plab retseptsiz topikal shakllarda mavjud bo'lib, ular og'riqli teri kasalliklarini davolashda foydalidir.
The distances of 61 PGCCs in the Second Galactic Quadrant
Creators: name: Guo, H. -L.
name: Chen, B. -Q.
name: Li, G. -X.
name: Huang, Y.
name: Yang, Y.
name: Li, X. -Y.
name: Sun, W. -X.
name: Liu, X. -W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Determining the distances to the Planck Galactic cold clumps (PGCCs) is crucial for the measurement of their physical parameters and the study of their Galactic distribution. Based on two large catalogues of stars with robust distances and reddening estimates from the literature, we have estimated accurate distances to 61 PGCCs in the second Galactic quadrant. For this purpose, we have selected stars along the sightlines overlapping with the cores of the sample clumps and fitted the reddening profiles with a simple reddening model. The typical uncertainties of the resultant distances of these PGCCs are less than 8 per cent. The new estimates differ significantly from the kinematic values, well known to suffer from large errors. With the new distances, we have updated the physical properties including the radii, masses and virial parameters of the cores of the PGCCs.
description: 9 pages, 5 figures, accepted for publication in MNRAS
Η έννοια του χρόνου στον I.Prigogine.Δοκιμή διαλεκτικής της θεολογίας με τις φυσικές επιστήμες.:
Creators: name: Παπαδόπουλος, Ιωάννης Παύλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Χρόνος
Ί.Πριγκοζίν
Διάλογος
Time
I.Prigogine
Dialogue

description: Ένα σύντομο χρονικό του χρόνου και μια προσπάθεια διαλόγου θεολογίας με τις φυσικές επιστήμες υπό το πρίσμα του νομπελίστα φυσικού Ίλυα Πριγκοζίν,είναι το περιεχόμενο της εργασίας.Σκοπός της να αναθερμάνει να επαναφέρει τον άνθρωπο στον διάλογό του με την φύση.Ο χρόνος,θεμελιώδης έννοια στην ζωή για τον Ρωσοβέλγο φυσικό, αποτελεί εγγενή ιδιότητα της φύσης,δίχως αρχή, μέση και τέλος.Είναι αιώνιος και προ-ηγείται της ύπαρξης μας και προϋπάρχει του σύμπαντος που μας περιβάλλει.Παράλληλα με τις θέσεις περί χρόνου του Πριγκοζίν,παρουσιάζονται οι αντίστοιχες πατερικές θέσεις,τονίζεται ιδιαίτερα το παράδειγμα του Μ.Βασιλείου, αλλά και οι απόψεις σύγχρονων θεολόγων.Με τον τρόπο αυτό επιχειρείται μια διαλογική σύζευξη της θεολογίας με τις φυσικές επιστήμες στο θέμα του χρόνου,ανοίγεται ένας διάλογος με σκοπό την επι-κοινωνία και την συμφιλίωση των δύο μερών.
description: A short brief of time and an attempt to debate theology with the natural sciences in the light of natural Nobelist Ilya Prigogine, is the content of this essay.
description: The main objective is to revive the man to restore the dialogue with the nature.Time, a fundamental concept in life, for I.Prigogine, is an inherent property of nature, without beginning, middle and end.Time is eternal and pre-heads of our existence and existed in the universe, that surrounds us.In addition, this short brief of time presents the corresponding patristic positions, particularly emphasizes the example of Saint Basil also the views of modern theologicians.This essay seeks an interactive pair of theology with science on the issue of time, opened a dialogue with a view to on-society and the reconciliation of both parties.
Απόδοση σε σχέση με ενέργεια μεθόδων χρονοδρομολόγησης σε κατανεμημένα συστήματα μεγάλης κλίμακας:
Creators: name: Τερζόπουλος, Γεώργιος Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Εξοικονόμηση
Ενέργεια
Απόδοση
Saving
Energy
Efficiency

description: Η ανάγκη για εξοικονόμηση ενέργειας είναι μια από τις βασικές επιδιώξεις του ανθρώπου αυτήν την περίοδο. Οι λόγοι είναι κυρίως περιβαλλοντικοί αλλά και οικονομικοί. Το κόστος της ενέργειας αυξάνεται με την πάροδο του χρόνου και η επιβάρυνση στο περιβάλλον λόγω του διοξειδίου του άνθρακα γίνεται όλο και μεγαλύτερη. Ένα μεγάλο μέρος της ενέργειας που καταναλώνεται σε συστήματα υπολογιστών προέρχεται από την λειτουργία των επεξεργαστών. Μεγάλο μέρος της έρευνας έχει επικεντρωθεί στην εξοικονόμηση ενέργειας στους επεξεργαστές, με αισιόδοξα αποτελέσματα. Οι σύγχρονοι επεξεργαστές διαθέτουν αρκετές στάθμες συχνότητας λειτουργίας και αυτό τους επιτρέπει να εξοικονομούν ενέργεια όταν ο φόρτος δεν είναι μεγάλος ή όταν οι διεργασίες έχουν μεγάλη προθεσμία εξυπηρέτησης. Στην παρούσα εργασία μελετήσαμε την απόδοση ενός κατανεμημένου συστήματος με 2 ομογενείς συστοιχίες (Clusters), το οποίο διαθέτει σύγχρονους επεξεργαστές που μπορούν να προσαρμόσουν την συχνότητα λειτουργίας τους ανάλογα με τον φόρτο. Στην προσομοίωση μελετήσαμε την εξοικονόμηση ενέργειας που επιτυγχάνεται χρησιμοποιώντας την λειτουργία εξοικονόμησης ενέργειας των επεξεργαστών αλλά και τον αντίκτυπο που έχει αυτό στην απόδοση του συστήματος. Τα αποτελέσματα της προσομοίωσης έδειξαν ότι χρησιμοποιώντας τις κατάλληλες πολιτικές δρομολόγησης, σε συνδυασμό με την ελάττωση της συχνότητας λειτουργίας των επεξεργαστών, επιτυγχάνεται μείωση της κατανάλωσης ενέργειας γύρω στο 30%, χωρίς να μειώνεται σε μεγάλο βαθμό η απόδοση του συστήματος.
description: The need for saving energy is one of the main goals of man at the present time. The reasons are mainly environmental and economical. Energy costs have increased over time and the global warming effect is accelerating. Much of the energy consumed in computing systems comes from the operation of processors. Research has focused on saving energy in processors, with promising results. Modern processors have several levels of operating frequency and this allows them to save energy when the load is low, or where tasks don’t have a tight deadline. We studied the performance of a distributed system with 2 homogeneous clusters with modern processors that can adjust the operating frequency depending on the workload. We measured energy savings achieved by using power-saving processors and the impact this has on system’s performance. Simulation results show that using appropriate routing policies and decreasing the operating frequency of processors, we can reduce energy consumption around 30% without sacrificing system’s efficiency.
Advanced Technologies for Navigation in Large Amounts of Photo Content from Social Media:
Creators: name: Καπίρης, Στέφανος Μιχαήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Φωτογραφίες
Κοινωνικά Δίκτυα
Ομαδοποίηση
Photos
Social Networks
Clustering

description: Σκοπός της πτυχιακής ήταν η κατασκευή μίας Web 2.0 εφαρμογής (ClustTour) για την πλοήγηση σε μεγάλο όγκο φωτογραφιών με γεωγραφικές συντεταγμένες. Οι φωτογραφίες αυτές οργανώνονται σε ομάδες (clusters) και οι ομάδες αυτές παρουσιάζονται πάνω σε διαδραστικό χάρτη (Google Maps). Παράλληλα αναπτύχθηκε ένα στρώμα στην εφαρμογή Layar με τη βοήθεια του οποίου οι ομάδες παρουσιάζονται σε οθόνη (augmented reality) κινητού τηλεφώνου 4ης γενιάς (smart phone). Επιπρόσθετα η Web 2.0 εφαρμογή έχει λειτουργίες κοινωνικού χαρακτήρα όπως συγγραφή και δημοσίευση σχολίων τόσο εσωτερικά στο ClustTour όσο και στο Facebook.
description: The aim of the present thesis was the creation of a Web 2.0 application (ClustTour) for navigation in large amounts of photo content with geolocation medatada. Those photos are organized into clusters and those clusters are displayed on an interactive map (Google Maps). At the same time a Layar's layer was developed for representing the clusters in the screen of a smart phone device (augmented reality). There are also some social features developed like writing and publishing comments inside ClustTour or even on Facebook.
KPR'de Defibrilatörü Önceden Şarj Etmek
Creators: name: Erkman Sanrı
Publisher: name: Zenodo
Year: 2016

description: Hepimizin bildiği üzere kardiyak arrestlerde defibrilasyon (DF) zamanları hayatta kalma ile direk ilişkili(1). Son güncel kılavuzlar KPR’de (kardiyopulmoner resüsitasyon) göğüs basısına mümkün olduğunca ara vermeden, etkin bir şekilde yapılmasının altını çizmekte ve aksi takdirde sonuçların hastanın sağkalımı ile ters orantılı olduğunu belirtmekte (2,3). Göğüs basıları arasında uygulanan nabız/ritim kontrolü ve eğer gerekiyorsa DF, göğüs basılarına ara verdiğimiz süreçler. Bunlara ek olarak; defibrilatör hazırlığı (cihazın şarj olması, pedlerin yerleştirilmesi, sözel uyarının verilmesi) için geçen süre DF’yi geciktiren süreçlerden. Gerek göğüs basısının duraksaması gerekse şoklanabilir ritim varlığında DF’nin gecikmesi KPR başarısını azaltır. Aslında bu süreler deneyimli resüsitasyon ekipleri için çok kısa süreler olarak gözükse de; her saniyenin değerli olduğunu ve her resüsitasyon ekibinin bir diğeri kadar deneyimli olamayabileceğini akla getirmek gerekiyor. Öyleyse; göğüs basısına (mecburen) ara verdiğimiz bu süreleri kısaltmak ve defibrilasyondaki gecikmeleri asgariye indirmek için yapabileceğimiz tüm hazırlıkları resüsitasyon uygulayıcıları olarak yapmalıyız.
Determinations of temperature and density for solar-like Stars using Si XI soft X-ray emission lines
Creators: name: Liang, G. Y.
name: Zhao, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study temperature and density sensitivities of ratios of Si XI soft X-ray emission lines, in the wavelength range of 43--54Å. The typical temperature of the formation of the analyzed lines is around 1.6~MK, which makes this analysis complementary to the analysis of He-like triplets being sensitive to hotter plasma. We present theoretical calculations and compare them with ratios obtained from high-resolution X-ray spectra of five solar-like stars: Procyon, $α$ Cen A$&$B, $ε$ Eri, and Capella. We find that our results are in good agreement with results obtained by other authors through different diagnostics, namely the analysis of density- and temperature-sensitive He-like triplet lines. We further estimate the coronal pressure and filling factors from Si~XI lines in this study.
description: 21 pages, 6 figures, Accepted in AJ
Additional file 1 of The mental health impact of COVID-19 outbreak: a Nationwide Survey in Iran
Creators: name: Shahriarirad, Reza
name: Erfani, Amirhossein
name: Keivan Ranjbar
name: Bazrafshan, Amir
name: Alireza Mirahmadizadeh
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Distribution of depression and general anxiety among the Iranian general population based on province.
Magnetic Excitation Spectrum of the Square Lattice S=1/2 Heisenberg Antiferromagnet K2V3O8
Creators: name: Lumsden, M. D.
name: Nagler, S. E.
name: Sales, B. C.
name: Tennant, D. A.
name: McMorrow, D. F.
name: Lee, S. -H.
name: Park, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have explored the magnetic excitation spectrum of the S=1/2 square lattice Heisenberg antiferromagnet, K2V3O8 using both triple-axis and time-of-flight inelastic neutron scattering. The long-wavelength spin waves are consistent with the previously determined Hamiltonian for this material. A small energy gap of 72+/-9 micro-eV is observed at the antiferromagnetic zone center and the near-neighbor exchange constant is determined to be 1.08+/-0.03 meV. A finite ferromagnetic interplanar coupling is observed along the crystallographic c-axis with a magnitude of Jc=-0.0036+/-0.006 meV. However, upon approaching the zone boundary, the observed excitation spectrum deviates significantly from the expectation of linear spin wave theory resulting in split modes at the (pi/2,pi/2) zone boundary point. The effects of magnon-phonon interaction, orbital degrees of freedom, multimagnon scattering, and dilution/site randomness are considered in the context of the mode splitting. Unfortunately, no fully satisfactory explanation of this phenomenon is found and further theoretical and experimental work is needed.
description: 15 pages, 13 figures, submitted to Physical Review B
Unified View of Avalanche Criticality in Sheared Glasses
Creators: name: Oyama, Norihiro
name: Mizuno, Hideyuki
name: Ikeda, Atsushi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Plastic events in sheared glasses are considered an example of so-called avalanches, whose sizes obey a power-law probability distribution with the avalanche critical exponent $τ$. Although mean-field theory predicts a universal value of this exponent, $τ_{\rm MF}=1.5$, numerical simulations have reported different values depending on the literature. Moreover, in the elastic regime, it has been noted that the critical exponent can be different from that in the steady state, and even criticality itself is a matter of debate. Because these confusingly varying results were reported under different setups, our knowledge of avalanche criticality in sheared glasses is greatly limited. To gain a unified understanding, in this work, we conduct a comprehensive numerical investigation of avalanches in Lennard-Jones glasses under athermal quasistatic shear. In particular, by excluding the ambiguity and arbitrariness that has crept into the conventional measurement schemes, we achieve high-precision measurement and demonstrate that the exponent $τ$ in the steady state follows the mean-field prediction of $τ_{\rm MF}=1.5$. Our results also suggest that there are two qualitatively different avalanche events. This binariness leads to the non-universal behavior of the avalanche size distribution and is likely to be the cause of the varying values of $τ$ reported thus far. To investigate the dependence of criticality and universality on applied shear, we further study the statistics of avalanches in the elastic regime and the ensemble of the first avalanche event in different samples, which provide information about the unperturbed system. We show that while the unperturbed system is indeed off-critical, criticality gradually develops as shear is applied. Moreover, the critical exponent obeys the mean-field prediction $τ_{\rm MF}$ universally, once the system becomes critical.
description: 16 pages, 16 figures
Ευστάθεια Πινάκων και Συστημάτων με τη μέθοδο των ιδιοτιμών και ιδιοδομών – Εφαρμογές με MATLAB:
Creators: name: Σταυρίδης, Φώτιος Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Ευστάθεια
Ιδιοτιμές
Ιδιοδομές
Stabilization
Eigenvalues
Eigenstructures

description: Στο κεφάλαιο 0 θα παρουσιάσουμε κάποιους χρήσιμους ορισμούς από τη Θεωρία Ελέγχου.Στο κεφάλαιο 1 θα ασχοληθούμε με τη σταθεροποίηση ενός γραμμικού συστήματος ελέγχου επιλέγοντας κατάλληλα το διάνυσμα ελέγχου. Αυτό συνδέεται με την επίλυση του προβλήματος της τοποθέτησης των πόλων. Η επιλογή της τοποθέτησης των πόλων, εκτός από την ευστάθεια του γραμμικού συστήματος μπορεί να ικανοποιεί και κάποια κριτήρια απόδοσης. Στο τέλος του κεφαλαίου θα ασχοληθούμε με τα προβλήματα ελέγχου και την έννοια της μιγαδικής ακτίνας σταθερότητας.Στο κεφάλαιο 2 θα αναπτύξουμε κάποιους αλγόριθμους και εφαρμογές σε MATLAB ορισμένων θεμάτων που παρουσιάζουμε στο κεφάλαιο 1.
description: In chapter 0, we present some definitions from the Control Theory.In chapter 1, we will consider the problem of stabilizing a linear control system by choosing the control vector appropriately. This is connected with the solution of the pole placement problem or the eigenvalue assignment problem ( EVA problem ).Since there are no set guidelines as to where the poles need to be placed, very often we choose to place the poles in such a way that not only the system is stabilized, but a certain performance criterion is satisfied ( LQR problems ).The next topic is the control problems and finally the concept of the complex stability radius. In chapter 2 we will make some algorithms and examples from some of the topics we described in chapter.
Determining the output port from the distance
Creators: name: Ghiu, Iulia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper we discuss the following scenario. Suppose that two distant observers share an entangled state of two $D$-level systems. The two observers, Alice and Bob, have to send randomly their particles through a multi-input multi-output device. The task is to determine the nature of this device or black-box, such that Alice will be able to determine with certainty the output port of Bob's particle. We prove that this black-box is the multi-input-port quantum sorter. Further, we investigate if it is possible to determine the output port in the case when three observers are involved by analyzing the cases when the Greenberger-Horne-Zeilinger (GHZ) state and the W state are used.
Electron spin quantum beats in positively charged quantum dots: nuclear field effects
Creators: name: Lombez, L.
name: Braun, P. -F.
name: Marie, X.
name: Renucci, P.
name: Urbaszek, B.
name: Amand, T.
name: Krebs, O.
name: Voisin, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We have studied the electron spin coherence in an ensemble of positively charged InAs/GaAs quantum dots. In a transverse magnetic field, we show that two main contributions must be taken into account to explain the damping of the circular polarization oscillations. The first one is due to the nuclear field fluctuations from dot to dot experienced by the electron spin. The second one is due to the dispersion of the transverse electron Lande g-factor, due to the inherent inhomogeneity of the system, and leads to a field dependent contribution to the damping. We have developed a model taking into account both contributions, which is in good agreement with the experimental data. This enables us to extract the pure contribution to dephasing due to the nuclei.
description: 10 pages, 6 figures
Motzkin numbers, central trinomial coefficients and hybrid polynomials
Creators: name: Blasiak, P.
name: Dattoli, G.
name: Horzela, A.
name: Penson, K. A.
name: Zhukovsky, K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 11B83; 05A19; 33C45

description: We show that the formalism of hybrid polynomials, interpolating between Hermite and Laguerre polynomials, is very useful in the study of Motzkin numbers and central trinomial coefficients. These sequences are identified as special values of hybrid polynomials, a fact which we use to derive their generalized forms and new identities satisfied by them.
description: 13 pages
Statistical detection of Josephson, Andreev, and single quasiparticle currents in scanning tunneling microscopy
Creators: name: Ko, Wonhee
name: Dumitrescu, Eugene F.
name: Maksymovych, Petro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a method to identify distinct tunneling modes in tunable superconducting tunnel junction composed of superconducting tip and sample in scanning tunneling microscope. Combining the measurement of the relative decay constant of tunneling current extracted from I-V-z spectroscopy with its statistical analysis over the atomic disorders in the sample surface, we identified the crossover of tunneling modes between single quasiparticle tunneling, multiple Andreev reflection, and Josephson tunneling with respect to the bias voltage. The method enables one to determine the particular tunneling regime independently of the spectral shapes, and to reveal the intrinsic modulation of Andreev reflection and Josephson current that would be crucial for quantum device application of superconductors.