cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Drought Stress and Plants Production: A Review with Future Prospects
Creators: name: Muhammad Zaib
name: Ali Zeeshan
name: Saira Aslam
name: Sadaf Bano
name: Aqsa Ilyas
name: Zeeshan Abbas
name: Aquib Nazar
name: Sana Mumtaz
Publisher: name: Zenodo
Year: 2023

description: Drought stress is a significant environmental constraint that severely impacts agricultural productivity and food security worldwide. As the population of the world increasing rapidly and it has been reported in many reports it will reach 9 to 10 Billion at the end of 2050, so it is big challenge for different researchers and policies maker to adopt different strategies that can decrease the effect of drought stress on plants. Researchers from all over the world are working on such kinds of crops verities that can survive under water deficient conditions.The growing population and the associated need for food place a significant burden on agricultural communities all over the globe. However, several variables continuously affect agricultural production, such as limited land holdings, inadequate mechanisation, and the incidence of several biotic and abiotic pressures. Every year, the abiotic stress caused by drought is one example of significant reductions in agricultural production. Conditions of drought arise when there is a shortage of water due to a reduction in the amount of rainfall and an increase in the number of dry periods.This review article provides a comprehensive analysis of the effects of drought stress on agriculture production and explores potential strategies to mitigate its adverse effects. The paper examines the physiological and biochemical responses of plants to drought stress, including water-use efficiency, stomatal regulation, and osmotic adjustments. It also discusses the role of genetic and molecular mechanisms in conferring drought tolerance in crops. Additionally, the review explores various agronomic and management practices for drought adaptation, such as drought-resistant crop varieties, irrigation techniques, and soil moisture conservation methods. Furthermore, it highlights the potential of modern biotechnological tools, including molecular breeding and gene editing, in enhancing drought resilience. Lastly, the review identifies future prospects and research directions to achieve sustainable agriculture under increasing drought challenges.
Universal Higher Order Singlet QED Corrections to Unpolarized Lepton Scattering
Creators: name: Blümlein, Johannes
name: Kawamura, Hiroyuki
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the universal flavor-singlet radiative QED corrections to unpolarized lepton scattering applicable to general differential scattering cross sections, involving charged fermions or photons in initial or final states. The radiators are derived to $O((α\ln(Q^2/m_f^2))^5)$ in analytic form. Numerical illustrations are given.
description: 31 pages, 3 figures, 1 style file
Poisson Structures on Finitary Incidence Algebras
Creators: name: Kaygorodov, Ivan
name: Khrypchenko, Mykola
Publisher: name: arXiv
Year: 2020
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: We give a full description of the Poisson structures on the finitary incidence algebra $FI(P,R)$ of an arbitrary poset $P$ over a commutative unital ring $R$.
Complexes of transition metal ions with naturally occurring ligands
Creators: name: Shuter, Edward M.
Publisher: name: University of British Columbia
Year: 2009

description: Attempts to prepare tris(ligand)metal complexes of technetium in intermediate oxidation states with potentially bidentate oxazoline- and thiazoline-containing ligands were unsuccessful; when pertechnetate was reduced in the presence of excess ligand, TcO₂ xH₂O was produced. Instead, by reaction with pre-formed metal-oxo cores, a series of oxotechnetium(V) and oxorhenium(V) complexes of the formula MOXL₂(M = Re, X = Br; M = Tc, X = CI), and HL = 2-(2'-hydro xyphenyl)-2-oxazoline (Hoz), 2-(2'-hydroxy-3-methylphenyl)-2-oxazoline (Hmoz), 2-(2' -hydroxyphenyl)-2-thiazoline (Hthoz), and 2-(2' -hydroxyphenyl)-2-benzoxazole (Hhbo) have been prepared. These compounds have been characterized by a variety of techniques, including single crystal X-ray diffraction for two of the complexes, TcOCl(thoz)₂ and ReOBr(oz)₂. In the two complexes, the geometry around the metals is distorted octahedral with the halide ligands in each bound cis, and one phenolate oxygen from one ligand in each bound trans to the metal-oxo linkage. In ReOBr(oz)₂ , the two oxazoline nitrogens are coordinated trans to one another; in TcOCl(thoz)₂, the two thiazoline nitrogens are found cis to one another. In studies of potentially insulin mimetic compounds analogous to bis(maltolato)oxovanadium(IV), the complexes bis(maltolato)oxo(pyridine)vanadium(IV) (VO(ma)₂(py)), oxobis(picolinato)vanadium(IV) monohydrate, (VO(pic)₂(H₂O)), ammonium dioxobis(picolinato)vanadate(V) dihydrate, (NH₄[VO₂(pic)₂]-2H₂O), and bis(maltolato)- dioxomolybdenum(VI), (MoO₂(ma)₂), have been prepared and characterized by elemental analysis, infrared spectroscopy, and mass spectrometry. In addition, the ¹H NMR of the diamagnetic MoO₂(ma)₂ was obtained. Bis(maltolato)methoxyoxovanadium(V), (VO(ma)₂(OMe)), was synthesized and was characterized by ¹H and ⁵¹V NMR infrared spectroscopy, and mass spectromerty. 2-hydroxyethoxybis(maltolato)oxovanadium(V), VO(ma)₂(OCH₂CH₂OH), was characterized by ⁵¹V NMR. X-ray structures were obtained for NH₄[VO₂(pic)₂], VO(ma)₂(OCH₂CH₂OH), and MoO₂(ma)₂.
Instabilities of Black Strings and Branes
Creators: name: Harmark, Troels
name: Niarchos, Vasilis
name: Obers, Niels A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We review recent progress on the instabilities of black strings and branes both for pure Einstein gravity as well as supergravity theories which are relevant for string theory. We focus mainly on Gregory-Laflamme instabilities. In the first part of the review we provide a detailed discussion of the classical gravitational instability of the neutral uniform black string in higher dimensional gravity. The uniform black string is part of a larger phase diagram of Kaluza-Klein black holes which will be discussed thoroughly. This phase diagram exhibits many interesting features including new phases, non-uniqueness and horizon-topology changing transitions. In the second part, we turn to charged black branes in supergravity and show how the Gregory-Laflamme instability of the neutral black string implies via a boost/U-duality map similar instabilities for non- and near-extremal smeared branes in string theory. We also comment on instabilities of D-brane bound states. The connection between classical and thermodynamic stability, known as the correlated stability conjecture, is also reviewed and illustrated with examples. Finally, we examine the holographic implications of the Gregory-Laflamme instability for a number of non-gravitational theories including Yang-Mills theories and Little String Theory.
description: 119 pages, 16 figures. Invited review for Classical and Quantum Gravity
Integration and mining of malaria molecular, functional and pharmacological data: how far are we from a chemogenomic knowledge space?
Creators: name: Birkholtz, L. -M.
name: Bastien, O.
name: Wells, G.
name: Grando, D.
name: Joubert, F.
name: Kasam, V.
name: Zimmermann, M.
name: Ortet, P.
name: Jacq, N.
name: Roy, S.
name: Hoffmann-Apitius, M.
name: Breton, V.
name: Louw, A. I.
name: Maréchal, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: The organization and mining of malaria genomic and post-genomic data is highly motivated by the necessity to predict and characterize new biological targets and new drugs. Biological targets are sought in a biological space designed from the genomic data from Plasmodium falciparum, but using also the millions of genomic data from other species. Drug candidates are sought in a chemical space containing the millions of small molecules stored in public and private chemolibraries. Data management should therefore be as reliable and versatile as possible. In this context, we examined five aspects of the organization and mining of malaria genomic and post-genomic data: 1) the comparison of protein sequences including compositionally atypical malaria sequences, 2) the high throughput reconstruction of molecular phylogenies, 3) the representation of biological processes particularly metabolic pathways, 4) the versatile methods to integrate genomic data, biological representations and functional profiling obtained from X-omic experiments after drug treatments and 5) the determination and prediction of protein structures and their molecular docking with drug candidate structures. Progresses toward a grid-enabled chemogenomic knowledge space are discussed.
description: 43 pages, 4 figures, to appear in Malaria Journal
Certificate of approval of ethics committee of research protocol chest wall hydatic disease: surgical managment and risk factor for recurrence and mortality
Creators: name: Rouis, Houda
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 420202
subject: Disease surveillance

description: Certificate of approval of ethics committee of research protocol Number 20/2024 in October 2024
Innovative Inorganic Pollutant Bioremediation Approaches for Industrial Wastewater Treatment: A Review
Creators: name: Muhammad Zaib
name: Muhammad Aryan
name: Haseeb Ullah
Publisher: name: Zenodo
Year: 2023

description: Industrial activities contribute significantly to the release of inorganic pollutants into wastewater, posing environmental and human health risks.Inorganic pollutants, also known as inorganic contaminants, refer to chemical substances that do not contain carbon-hydrogen (C-H) bonds in their molecular structure. These substances are typically derived from minerals and elements found innature, and they can have various adverse effects on the environment and human health when present in excessive amounts. Inorganic pollutants are often released into the environment as a result of industrial activities, mining, agriculture, and other human-related processes. Bioremediation, a sustainable and cost-effective approach, holds promise for addressing these challenges. This comprehensive review explores cutting-edge bioremediation strategies tailored for the removal of inorganic pollutants from industrial wastewater. The review highlights innovative techniques, reactor designs, and successful case studies from various industries. By delving into the mechanisms, benefits, challenges, and potential synergies of combining bioremediation with industrial processes, this review offers insights into advancing sustainable wastewater treatment in industrial settings.
Διερεύνηση της σχολικής επίδοσης των μαθητών της Β' και Γ' τάξης των δημόσιων ημερήσιων Ενιαίων Λυκείων.
Creators: name: Βουκελάτος, Μιχαήλ
name: Κατσίλλης, Ιωάννης Μ.
name: Λαμπρόπουλος, Χ.
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: This study examines the relationships between educational achievement and a number of independent variables, such as educational expectations, effort, mental ability, general and academic self-efficacy, extraversion, psy- choticism, neuroticism, anxiety, family’s structure and socio-economic sta¬tus, significant others’ influence, school’s place and composition etc. Data were collected from 1.328 students of 21 schools throughout of Greece selected using single stage cluster sampling. Each student completed three questionnaires in 11th and 12th grade and the educational achievement was collected electronically from NESTOR school information system. Structural equation models were used to estimate the direct and indirect effects of the variables. The analysis of the data showed that the models were very satisfactory explaining about 50% of the educational achievement and most of the above variables had significant direct or indirect effects. Differences in effects on the school level grades and on the grades of nation¬al level written examinations were also examined.
description: Παιδαγωγική Επιθεώρηση, Vol. 44 (2007)
Η προετοιμασία των εκπαιδευτικών πρωτοβάθμιας και δευτεροβάθμιας εκπαίδευσης για το πολυπολιτισμικό σχολείο: Ένα σχέδιο προγράματος κατάρτισης και επιμόρφωσης.
Creators: name: Λιακοπούλου, Μαρία
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: Παιδαγωγική Επιθεώρηση, Vol. 44 (2007)
Η δυναμική και σεισμική συμπεριφορά ενός διώροφου κτιρίου με ο/σ με τοιχοπληρώσεις στο Ληξούρι Κεφαλονιάς συμπεριλαμβάνοντας την αλληλεπίδραση εδάφους-θεμελίωσης:
Creators: name: Ναξάκης, Διονύσης Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Σεισμική απόκριση
Τοιχοπληρώσεις
Αλληλεπίδραση εδάφους - θεμελίωσης
Earthquake behavior
Masonry infills
Soil - structure interaction

description: Η παρούσα διπλωματική εργασία πραγματεύεται τη μελέτη της δυναμικής και σεισμικής συμπεριφοράς ενός διώροφου κτιρίου από οπλισμένο σκυρόδεμα με τοιχοπληρώσεις στο Ληξούρι της Κεφαλονιάς συμπεριλαμβάνοντας την αλληλεπίδραση εδάφους - θεμελίωσης. Το κτίριο αυτό είναι το πρώην Δημαρχείο του Ληξουρίου. Στο κτίριο αυτό είχε τοποθετηθεί όργανο της ισχυρής εδαφικής κίνησης που κατέγραψε το σεισμό της 3.2.2014. Τα φάσματα απόκρισης των δύο οριζόντιων συνιστωσών του σεισμού, της καταγραφής αυτής, αξιοποιήθηκαν για τη μελέτη της σεισμικής απόκρισης της κατασκευής. Οι απαραίτητες πληροφορίες για την κατασκευή συλλέχτηκαν κατά την επίσκεψή της και από το αρχείο της Υπηρεσίας Πολεοδομίας της περιοχής. Η προσομοίωση της κατασκευής έγινε με γραμμικά και επιφανειακά πεπερασμένα στοιχεία, ενώ λήφθηκαν υπόψη και οι τοιχοποιίες των πλαισίων με κατάλληλα μη γραμμικά στοιχεία. Η προσομοίωση του εδάφους έγινε με κατάλληλα μη γραμμικά ελατήρια. Η δυναμική και σεισμική συμπεριφορά του κτιρίου μελετάται με την πραγματοποίηση κατάλληλων γραμμικών και μη γραμμικών αναλύσεων στο SAP2000.
description: The present thesis investigates the earthquake behavior of a two-storey R/C building with masonry infills, in Lixouri Cephalonia, taking into account the soil - structure interaction. This building is the former City Hall of Lixouri. In this building had been placed organ that recorded the strong ground motion of the earthquake of 03/02/2014. The response spectra of the two horizontal components of the earthquake, were utilized for the study of the seismic response of the structure. The necessary information for the structure was obtained from the visit to the structure and from the Planning Office's file. The simulation of the construction has been done with linear and surface finite elements. The masonry infills of the R/C frames have been simulated with suitable non-linear links. The simulation of the soil has been done with suitable non-linear springs. The dynamic and seismic building behavior is studied by running linear and nonlinear analysis in SAP2000.
Non-equilibrium Ionization State of Warm-Hot Intergalactic Medium
Creators: name: Yoshikawa, Kohji
name: Sasaki, Shin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Time evolution of the ionization state of metals in the cosmic baryons is investigated in a cosmological context without the assumption of ionization equilibrium. We find that a significant fraction of ionized oxygen ions (OVII and OVIII) in the warm-hot intergalactic medium (WHIM) is not in the ionization equilibrium state at a redshift of z~0. We also investigate the effect on the detectability and observables of WHIM as a consequence of such deviation from ionization equilibrium. It is found that the detectability of WHIM is not altered very much both through its emission and absorption signatures, but line ratios between OVII and OVIII are significantly different from those in the ionization equilibrium state.
description: 25 pages, 18 figures, accepted for publication in PASJ
The James Webb Space Telescope
Creators: name: Gardner, Jonathan P.
name: Mather, John C.
name: Clampin, Mark
name: Doyon, Rene
name: Greenhouse, Matthew A.
name: Hammel, Heidi B.
name: Hutchings, John B.
name: Jakobsen, Peter
name: Lilly, Simon J.
name: Long, Knox S.
name: Lunine, Jonathan I.
name: McCaughrean, Mark J.
name: Mountain, Matt
name: Nella, John
name: Rieke, George H.
name: Rieke, Marcia J.
name: Rix, Hans-Walter
name: Smith, Eric P.
name: Sonneborn, George
name: Stiavelli, Massimo
name: Stockman, H. S.
name: Windhorst, Rogier A.
name: Wright, Gillian S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The James Webb Space Telescope (JWST) is a large (6.6m), cold (50K), infrared-optimized space observatory that will be launched early in the next decade. The observatory will have four instruments: a near-infrared camera, a near-infrared multi-object spectrograph, and a tunable filter imager will cover the wavelength range, 0.6 to 5.0 microns, while the mid-infrared instrument will do both imaging and spectroscopy from 5.0 to 29 microns. The JWST science goals are divided into four themes. The End of the Dark Ages: First Light and Reionization theme seeks to identify the first luminous sources to form and to determine the ionization history of the early universe. The Assembly of Galaxies theme seeks to determine how galaxies and the dark matter, gas, stars, metals, morphological structures, and active nuclei within them evolved from the epoch of reionization to the present day. The Birth of Stars and Protoplanetary Systems theme seeks to unravel the birth and early evolution of stars, from infall on to dust-enshrouded protostars to the genesis of planetary systems. The Planetary Systems and the Origins of Life theme seeks to determine the physical and chemical properties of planetary systems including our own, and investigate the potential for the origins of life in those systems. To enable these observations, JWST consists of a telescope, an instrument package, a spacecraft and a sunshield. The telescope consists of 18 beryllium segments, some of which are deployed. The segments will be brought into optical alignment on-orbit through a process of periodic wavefront sensing and control. The JWST operations plan is based on that used for previous space observatories, and the majority of JWST observing time will be allocated to the international astronomical community through annual peer-reviewed proposal opportunities.
description: 96 pages, including 48 figures and 15 tables, accepted by Space Science Reviews
Reply to "Comment on 'Critique of the foundations of time-dependent density functional theory'"
Creators: name: Schirmer, J.
name: Dreuw, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: In a recent Comment (arXiv:0710.0018), Maitra, Burke, and van Leeuwen (MBL) attempt to refute our criticism of the foundations of TDDFT (see Phys. Rev. A 75, 022513 (2007)). However, their arguments miss the essence of our position. This is mainly due to an ambiguity concerning the meaning of the so-called mapping derivation of time-dependent Kohn-Sham equations. We distinguish two different conceptions, referred to as potential-functional based fixed-point iteration (PF-FPI) and direct Kohn-Sham potential (DKSP) scheme, respectively. We argue that the DKSP scheme, apparently adopted by MBL, is not a density-functional method at all. The PF-FPI concept, on the other hand, while legitimately predicated on the Runge-Gross mapping theorem, is invalid because the convergence of the fixed-point iteration is not assured.
Isospin dependent hybrid model for studying isoscaling in heavy ion collisions around the Fermi energy domain
Creators: name: Mallik, S.
name: Chaudhuri, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Investigation of observables from nuclear multifragmentation reactions depending on isospin led to the development of a hybrid model. The mass and charge distribution as well as isotopic distribution was studied using this model for $^{112}$Sn+$^{112}$Sn reaction as well as $^{124}$Sn+$^{124}$Sn reactions at different energies. The agreement of the results obtained from the model with those from experimental data confirms the accuracy of the model. Isoscaling coefficients were extracted from these observables which can throw light on the symmetry energy coefficient. Another important facet of this model is that temperature of the studied reaction can be directly extracted using this model.
Διδακτική αντιμετώπιση των διαφορετικών αναγκών των μαθητών: Η περίπτωση των προχωρημένων αναγνωστών.
Creators: name: Κουτσουράκη, Στέλλα
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: The adjustment of teaching in general and written language teaching in particular to the individual learning needs and the level of each student’s skills development constitute a challenge for the primary school teachers. The advanced students need learning experiences planned particularly for them. The main principles that govern the appropriate, for the advanced readers, written language teaching approaches are referred to the depth and the complexity of content and process, to the challenge and to the creativity. In this article differentiated instruction is proposed as an answer to the needs and the abilities of advanced readers. Differentiated teaching is defined conceptually and its dimensions and students’ characteristics which are taken into consideration are reported. Specific examples from the teaching process are given and some teaching approaches that support the differen¬tiation of language teaching are analysed.
description: Παιδαγωγική Επιθεώρηση, Vol. 44 (2007)
A Review on Resistance Spot Welding for Similar and Dissimilar Joints
Creators: name: Ramani
name: Mathi Kannaiyan
Publisher: name: Zenodo
Year: 2023

description: Resistance spot welding is one of the primary welding techniques used as a successfully joining method for variety of jobs in the automobile structural body manufacture, rail vehicle construction, electronics manufacture, battery manufacture, aerospace industries etc. Welding input parameters plays a very significant role in determining the quality of a weld joint. The joint quality can be defined in terms of properties such as weld-bead geometry, mechanical properties, and distortion.However, the resulted joints are affected by some parameters such as quality, mechanical and metallurgical properties using various similar and dissimilar metals. Total 50 research papers were selected for our consideration after thorough investigation of several such papers.
Design strategies for optimizing holographic optical tweezers setups
Creators: name: Martin-Badosa, E
name: Montes-Usategui, M
name: Carnicer, A
name: Andilla, J
name: Pleguezuelos, E
name: Juvells, I
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: We provide a detailed account of the construction of a system of holographic optical tweezers. While much information is available on the design, alignment and calibration of other optical trapping configurations, those based on holography are relatively poorly described. Inclusion of a spatial light modulator in the setup gives rise to particular design trade-offs and constraints, and the system benefits from specific optimization strategies, which we discuss.
description: 16 pages, 15 figures
Triggered Star Formation in the Environment of Young Massive Stars
Creators: name: Gritschneder, M.
name: Naab, T.
name: Heitsch, F.
name: Burkert, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent observations with the Spitzer Space Telescope show clear evidence that star formation takes place in the surrounding of young massive O-type stars, which are shaping their environment due to their powerful radiation and stellar winds. In this work we investigate the effect of ionising radiation of massive stars on the ambient interstellar medium (ISM): In particular we want to examine whether the UV-radiation of O-type stars can lead to the observed pillar-like structures and can trigger star formation. We developed a new implementation, based on a parallel Smooth Particle Hydrodynamics code (called IVINE), that allows an efficient treatment of the effect of ionising radiation from massive stars on their turbulent gaseous environment. Here we present first results at very high resolution. We show that ionising radiation can trigger the collapse of an otherwise stable molecular cloud. The arising structures resemble observed structures (e.g. the pillars of creation in the Eagle Nebula (M16) or the Horsehead Nebula B33). Including the effect of gravitation we find small regions that can be identified as formation places of individual stars. We conclude that ionising radiation from massive stars alone can trigger substantial star formation in molecular clouds.
description: 4 pages, 2 figures. To appear in: "Triggered Star Formation in a Turbulent ISM", IAU Symposium 237, Prague, Czech Republic, August 2006; eds. B.G.Elmegreen & J. Palous
Memory formation in jammed hard spheres
Creators: name: Charbonneau, Patrick
name: Morse, Peter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Liquids equilibrated below an onset density share similar inherent states, while above that density their inherent states markedly differ. Although this phenomenon was first reported in simulations over 20 years ago, the physical origin of this memory remains controversial. Its absence from mean-field descriptions, in particular, has long cast doubt on its thermodynamic relevance. Motivated by a recent theoretical proposal, we reassess the onset phenomenology in simulations using a fast hard sphere jamming algorithm and find it both thermodynamically and dimensionally robust. Remarkably, we also uncover a second type of memory associated with a Gardner-like change in behavior along the jamming algorithm.
The soft X-ray Cluster-AGN spatial cross-correlation function in the ROSAT-NEP survey
Creators: name: Cappelluti, N.
name: Boehringer, H.
name: Schuecker, P.
name: Pierpaoli, E.
name: Mullis, C. R.
name: Gioia, I. M.
name: Henry, J. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: X-ray surveys facilitate investigations of the environment of AGNs. Deep Chandra observations revealed that the AGNs source surface density rises near clusters of galaxies. The natural extension of these works is the measurement of spatial clustering of AGNs around clusters and the investigation of relative biasing between active galactic nuclei and galaxies near clusters. The major aims of this work are to obtain a measurement of the correlation length of AGNs around clusters and a measure of the averaged clustering properties of a complete sample of AGNs in dense environments. We present the first measurement of the soft X-ray cluster-AGN cross-correlation function in redshift space using the data of the ROSAT-NEP survey. The survey covers 9x9 deg^2 around the North Ecliptic Pole where 442 X-ray sources were detected and almost completely spectroscopically identified. We detected a > 3 sigma significant clustering signal on scales s<50 h_70^-1 Mpc. We performed a classical maximum-likelihood power-law fit to the data and obtained a correlation length s_0=8.7^+1.2_-0.3 h70^-1 Mpc and a slope gamma=1.7^+0.2_-0.7 (1 sigma errors). This is a strong evidence that AGNs are good tracers of the large scale structure of the Universe. Our data were compared to the results obtained by cross-correlating X-ray clusters and galaxies. We observe, with a large uncertainty, a similar behaviour of the AGNs clustering around clusters similar to the clustering of galaxies around clusters.
description: 7 pages, 6 figures, Accepted by A&A
Η διερεύνηση της ικανότητας των παιδιών προσχολικής ηλικίας να αιτιολογούν τη συμπεριφορά που βασίζεται σε λανθασμένη πεποίθηση στο πλαίσιο της θεωρίας του νου.
Creators: name: Χατζηγεωργιάδου, Σ.
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: The past 20 years have seen rapid growth of a new field of developmen¬tal research, known as children’s theory of mind, which investigates the development of children’s ability to understand human activity by the attri¬bution of mental states to people and especially their beliefs about mental states.
In the present study we examined the ability of preschool children to invoke false belief when the direction of inference is from behavior to belief than from belief to behavior. Children examined an action based on false belief and judged on the outcome, rather than foretelling the protagonist‘s action as in the “unexpected transfer” task. Our methodological design was based on Wimmer & Perner (1983) and Robinson & Mitchell (1995) research.
We examined 64 preschool children, the data analysis and the outcome discussion is formed under Lewis (1994), Lewis & Maridaki - Kassotaki (1995) research frame of mind.
description: Παιδαγωγική Επιθεώρηση, Vol. 44 (2007)
Decays of $J/ψ$ and $ψ^\prime$ into vector and pseudoscalar meson and the pseudoscalar glueball-$q\bar{q}$ mixing
Creators: name: Li, Gang
name: Zhao, Qiang
name: Chang, Chao-Hsi
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We introduce a parametrization scheme for $J/ψ(ψ^\prime)\to VP$ where the effects of SU(3) flavor symmetry breaking and doubly OZI-rule violation (DOZI) can be parametrized by certain parameters with explicit physical interpretations. This scheme can be used to clarify the glueball-$q\bar{q}$ mixing within the pseudoscalar mesons. We also include the contributions from the electromagnetic (EM) decays of $J/ψ$ and $ψ^\prime$ via $J/ψ(ψ^\prime)\to γ^*\to VP$. Via study of the isospin violated channels, such as $J/ψ(ψ^\prime)\to ρη$, $ρη^\prime$, $ωπ^0$ and $ϕπ^0$, reasonable constraints on the EM decay contributions are obtained. With the up-to-date experimental data for $J/ψ(ψ^\prime)\to VP$, $J/ψ(ψ^\prime)\to γP$ and $P\to γγ$, etc, we arrive at a consistent description of the mentioned processes with a minimal set of parameters. As a consequence, we find that there exists an overall suppression of the $ψ^\prime\to 3g$ form factors, which sheds some light on the long-standing "$ρπ$ puzzle". By determining the glueball components inside the pseudoscalar $η$ and $η^\prime$ in three different glueball-$q\bar{q}$ mixing schemes, we deduce that the lowest pseudoscalar glueball, if exists, has rather small $q\bar{q}$ component, and it makes the $η(1405)$ a preferable candidate for $0^{-+}$ glueball.
description: Revised version to appear on J. Phys. G; An error in the code was corrected. There's slight change to the numerical results, while the conclusion is intact
Spatially Distributed Stochastic Systems: equation-free and equation-assisted preconditioned computation
Creators: name: Qiao, Liang
name: Erban, Radek
name: Kelley, C. T.
name: Kevrekidis, Ioannis G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Spatially distributed problems are often approximately modelled in terms of partial differential equations (PDEs) for appropriate coarse-grained quantities (e.g. concentrations). The derivation of accurate such PDEs starting from finer scale, atomistic models, and using suitable averaging, is often a challenging task; approximate PDEs are typically obtained through mathematical closure procedures (e.g. mean-field approximations). In this paper, we show how such approximate macroscopic PDEs can be exploited in constructing preconditioners to accelerate stochastic simulations for spatially distributed particle-based process models. We illustrate how such preconditioning can improve the convergence of equation-free coarse-grained methods based on coarse timesteppers. Our model problem is a stochastic reaction-diffusion model capable of exhibiting Turing instabilities.
description: 8 pages, 6 figures, submitted to Journal of Chemical Physics
Dynamical mass generation in QED with magnetic fields: arbitrary field strength and coupling constant
Creators: name: Rojas, Eduardo
name: Ayala, Alejandro
name: Bashir, Adnan
name: Raya, Alfredo
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the dynamical generation of masses for fundamental fermions in quenched quantum electrodynamics, in the presence of magnetic fields of arbitrary strength, by solving the Schwinger-Dyson equation (SDE) for the fermion self-energy in the rainbow approximation. We employ the Ritus eigenfunction formalism which provides a neat solution to the technical problem of summing over all Landau levels. It is well known that magnetic fields catalyze the generation of fermion mass m for arbitrarily small values of electromagnetic coupling α. For intense fields it is also well known that m \propto \sqrt eB. Our approach allows us to span all regimes of parameters αand eB. We find that m \propto \sqrt eB provided αis small. However, when αincreases beyond the critical value α_c which marks the onslaught of dynamical fermion masses in vacuum, we find m \propto Λ, the cut-off required to regularize the ultraviolet divergences. Our method permits us to verify the results available in literature for the limiting cases of eB and α. We also point out the relevance of our work for possible physical applications.
description: 5 pages, 4 figures. Accepted for publication in Phys. Rev. D
Polymer Informatics: Current Status and Critical Next Steps
Creators: name: Chen, Lihua
name: Pilania, Ghanshyam
name: Batra, Rohit
name: Huan, Tran Doan
name: Kim, Chiho
name: Kuenneth, Christopher
name: Ramprasad, Rampi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Artificial intelligence (AI) based approaches are beginning to impact several domains of human life, science and technology. Polymer informatics is one such domain where AI and machine learning (ML) tools are being used in the efficient development, design and discovery of polymers. Surrogate models are trained on available polymer data for instant property prediction, allowing screening of promising polymer candidates with specific target property requirements. Questions regarding synthesizability, and potential (retro)synthesis steps to create a target polymer, are being explored using statistical means. Data-driven strategies to tackle unique challenges resulting from the extraordinary chemical and physical diversity of polymers at small and large scales are being explored. Other major hurdles for polymer informatics are the lack of widespread availability of curated and organized data, and approaches to create machine-readable representations that capture not just the structure of complex polymeric situations but also synthesis and processing conditions. Methods to solve inverse problems, wherein polymer recommendations are made using advanced AI algorithms that meet application targets, are being investigated. As various parts of the burgeoning polymer informatics ecosystem mature and become integrated, efficiency improvements, accelerated discoveries and increased productivity can result. Here, we review emergent components of this polymer informatics ecosystem and discuss imminent challenges and opportunities.
Η έννοια της ευρωπαϊκής διάστασης στην εκπαίδευση: Εξέλιξη και προσεγγίσεις.
Creators: name: Θεοδωρίδης, Ανδρέας
name: Ιωαννίδου-Κουτσελίνη, Μαίρη
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: The European Dimension of Education (EDE) is a significant issue for current European education policy. The article presents the evolution of the interest and policies of the European Communities regarding education and training in general and the EDE in particular. Four periods of increasingly more active interest in education, as well as the current strategic emphasis on education as a means to reach the most advanced knowledge society, are briefly described. Furthermore, the concept of the EDE is analyzed in terms of: (a) its general scope, principles and goals; (b) its curriculum content; (c) its curriculum approach; (d) its relation to educational administration and organization. Different approaches to the issues are examined; more specif¬ically, the emphasis on the political, socio-cultural or economic dimensions leads to different views of the EDE. Similarly, the extent of students’ criti¬cal political action encouraged by schools is also a controversial issue. Finally, the writers express their belief that the European educational sys¬tems should seek a balance between their national and European dimen¬sions.
description: Παιδαγωγική Επιθεώρηση, Vol. 44 (2007)
On the Compression of Translation Operator Tensors in FMM-FFT-Accelerated SIE Simulators via Tensor Decompositions
Creators: name: Qian, Cheng
name: Yucel, Abdulkadir C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Tensor decomposition methodologies are proposed to reduce the memory requirement of translation operator tensors arising in the fast multipole method-fast Fourier transform (FMM-FFT)-accelerated surface integral equation (SIE) simulators. These methodologies leverage Tucker, hierarchical Tucker (H-Tucker), and tensor train (TT) decompositions to compress the FFT'ed translation operator tensors stored in three-dimensional (3D) and four-dimensional (4D) array formats. Extensive numerical tests are performed to demonstrate the memory saving achieved by and computational overhead introduced by these methodologies for different simulation parameters. Numerical results show that the H-Tucker-based methodology for 4D array format yields the maximum memory saving while Tucker-based methodology for 3D array format introduces the minimum computational overhead. For many practical scenarios, all methodologies yield a significant reduction in the memory requirement of translation operator tensors while imposing negligible/acceptable computational overhead.
Εκφοβισμός/θυματοποίηση στο σχολικό πλαίσιο και μοναξιά.
Creators: name: Γαλανάκη, Ευαγγελία
name: Βογιατζόγλου, Π.
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: This theoretical study presents an overview of the links between bullying / victimization and loneliness during childhood. Bullying and victimization are conceptually clarified and research evidence is briefly reviewed about bullying and victimization as risk factors for children’s mental health. Next, this study focuses on the links between bullying / victimization and loneli¬ness mainly in the school context. Complex paths leading from bullying / vic¬timization to loneliness and vice versa, and developmental trajectories of this association emerged from the existing concurrent and longitudinal data. Finally, some research implications for prevention and intervention efforts aiming at reducing bullying in school are discussed.
description: Παιδαγωγική Επιθεώρηση, Vol. 44 (2007)
A µSR study of spin relaxation of small molecules in the gas phase
Creators: name: Pan, James Jun
Publisher: name: University of British Columbia
Year: 2009

description: Current understanding of the underlying mechanisms of muonium and Mu-radical spin relaxation in the gas phase is presented. Models and formulae describing the effects of the three contributing processes, spin exchange, chemical reaction and collisional relaxation, on the muon spin polarization are developed and employed to extract reaction rate constants, cross sections and other kinetic parameters in reactions of Mu with atoms and small molecules; notably Mu + Cs, Mu + NO, Mu + N₂O and Mu + CO. The experimental data obtained are consistent with theory and the models so introduced. The radical relaxation rates obtained for larger molecules ( MuC₂H₄ and MUC₄H₈) are well described by the phenomenological model presented, which serves as a useful bridge linking the observed relaxation rates and the physical, chemical and magnetic properties of the reactants and offers invaluable insight into the underlying mechanisms causing muon spin relaxation. The ratios of thermal spin-flip cross sections (σ[sup H]/σ[sup Mu]) in electron spin exchange interactions (Mu + Cs and Mu + NO) are found to be about 3, consistent with previous experimental measurements for Mu + NO and Mu + O₂ systems. Reaction rates for Mu + NO, Mu + N₂O and Mu + CO were measured over a wide range of pressures (1 to 60 atm, up to 272 atm for CO) and in one case (N₂O) over a range of temperatures (300-600 K). Dramatic kinetic isotope effects are observed in all of these systems: a small "inverse" effect ([sup k]Mu/[sup k]H=0.23) in the Mu + NO reaction and large "normal" effects (([sup k]Mu/[sup k]H > 100) for the Mu + N₂O and Mu + CO reactions at room temperature. These kinetic isotope effects can be qualitatively understood within the trends indicated by reaction rate theory and the experimental results of the analogous H(D) reactions, but a quantitative comparison with theory must await specific calculations of the Mu reaction rates. This thesis data represents the first observation of large tunneling effects at room temperature in H-isotope addition reactions in the gas phase.
First Observation of Multiple Transverse Wobbling Bands of Different Kinds in $^{183}$Au
Creators: name: Nandi, S.
name: Mukherjee, G.
name: Chen, Q. B.
name: Frauendorf, S.
name: Banik, R.
name: Bhattacharya, Soumik
name: Dar, Shabir
name: Bhattacharyya, S.
name: Bhattacharya, C.
name: Chatterjee, S.
name: Das, S.
name: Samanta, S.
name: Raut, R.
name: Ghugre, S. S.
name: Rajbanshi, S.
name: Ali, Sajad
name: Pai, H.
name: Asgar, Md. A.
name: Gupta, S. Das
name: Chowdhury, P.
name: Goswami, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We report the first observation of two wobbling bands in $^{183}$Au, both of which were interpreted as the transverse wobbling (TW) band but with different behavior of their wobbling energies as a function of spin. It increases (decreases) with spin for the positive (negative) parity configuration. The crucial evidence for the wobbling nature of the bands, dominance of the $E2$ component in the $ΔI = 1$ transitions between the partner bands, is provided by the simultaneous measurements of directional correlation from the oriented states (DCO) ratio and the linear polarization of the $γ$ rays. Particle rotor model calculations with triaxial deformation reproduce the experimental data well. A value of spin, $I_m$, has been determined for the observed TW bands below which the wobbling energy increases and above which it decreases with spin. The nucleus $^{183}$Au is, so far, the only nucleus in which both the increasing and the decreasing parts are observed and thus gives the experimental evidence of the complete transverse wobbling phenomenon.
description: 6 pages, 5 figures, Accepted in Physical Review Letters
Προσδοκίες επάρκειας διευθυντών σε σχέση με τη φθορά που νιώθουν και την εμπιστοσύνη προς εκπαιδευτικούς, μαθητές και γονείς.
Creators: name: Νεοφυτίδης, Ν.
name: Ιακωβίδου, Ε.
name: Παναγή, Μ.
name: Πασιαρδής, Πέτρος
Publisher: name: Παιδαγωγική Επιθεώρηση
Year: 2015

description: The main goal of this piece of research was to investigate the beliefs of Cyprus primary school principals about their self-efficacy and how these beliefs affect their sense of burnout and trust they show towards teachers, students, and parents. A questionnaire was given to 55 primary school prin¬cipals in order to find out these views. Results indicate that these school principals have a high degree of self-efficacy which is positively correlated with regards to how much trust they indicate towards their students, teach¬ers and parents; further, this sense of self-efficacy is negatively correlated with the burnout they feel. Based on these results some suggestions are offered for future research in the area of principals’ sense of self-efficacy.
description: Παιδαγωγική Επιθεώρηση, Vol. 44 (2007)
Neutron-proton mass difference in nuclear matter
Creators: name: Meißner, Ulf-G.
name: Rakhimov, A. M.
name: Wirzba, A.
name: Yakhshiev, U. T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Isospin-breaking effects in nuclear matter are studied in the framework of a medium-modified Skyrme model. The proposed effective Lagrangian incorporates both the medium influence of the surrounding nuclear environment on the single nucleon properties and an explicit isospin-breaking effect in the mesonic sector. The approach predicts that the neutron-proton mass difference decreases in isospin-symmetric nuclear matter but by a very small amount only.
description: 8 pages, 4 figures, revised version
Post-Asymptotic Giant Stars in Gaia DR3
Creators: name: Minia, Manteiga
Publisher: name: Zenodo
Year: 2024

description: The publication of precise parallaxes in Gaia DR3 made it possible to calculate accurateddistances and to revise the derivation of luminosities for post-AGB candidates to discardobjects outside the expected luminosity range.We started by identifying post-AGB stars or possible candidates from the bibliography and,then, searched for their Gaia DR3 counterpart sources. Using the available photometry,interstellar extinction, literature spectroscopically derived temperatures or spectral types,and parallax-based distances, we fitted their Spectral Energy Distributions (SED) and weestimated their luminosities and circumstellar extinctions. When compared to models, luminosity values allowed us to disclose objects which are likely post-AGB stars from othertarget types. Their position on the Hertzsprung-Russell (HR) diagram allows direct com-parison with updated post-AGB evolutionary tracks and an estimation of their masses andevolutionary ages.