cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
QISHLOQ XO'JALIGIDA BENTONITDAN FOYDALANISHNING ILMIY JIHATLARI VA SAMARADORLIGI
Creators: name: Rahimova, Gulnoza
Publisher: name: Zenodo
Year: 2023

description: Bentonitdan qishloq xo'jaligida foydalanishning ilmiy jihatlari maqolada batafsil bayon etilgan.Bentonitning kimyoviy tarkibi va paxta yetishtirishda qollanishining ijobiy tomonlari haqida ma'lumotlar berilgan.Go'za chigitlarini sho'rlangan tuproq sharoitida bentonid bilan ishlov berish hosildorlik va sifat ko'rsatkichlarini oshiradi.
Vibronic order and emergent magnetism in cubic $d^1$ double perovskites
Creators: name: Iwahara, Naoya
name: Chibotaru, Liviu F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The synergistic interplay of different interactions in materials leads to the emergence of novel quantum phenomena. Spin-orbit and vibronic couplings usually counteract each other, however, in cubic $d^1$ double perovskites they coexist and give rise to spin-orbit-lattice entanglement with unquenched dynamic Jahn-Teller effect on the metal sites. The correlation of these entangled states induced by intersite interactions was not assessed so far. Here, we investigate the joint cooperative effect of spin-orbit and vibronic interactions on the formation of the ordered phases in $d^1$ double perovskites. We found that the magnetic ordered states in these systems coexist with a dynamic vibronic order characterized by the ordering of vibronic quadrupole moments on sites. This treatment allows the rationalization of a number of unexplained features of experimentally investigated phases.
Forward-backward multiplicity correlations in relativistic heavy-ion collisions in a superposition approach
Creators: name: Olszewski, Adam
name: Broniowski, Wojciech
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We analyze the multiplicity correlations between distant forward and backward rapidity regions in relativistic heavy-ion collisions in a superposition framework, where the particle production occurs through independent emission from correlated sources. This in principle allows for inferring information on the long-range forward-backward correlations of the sources in the earliest phase of the collision, based solely on the experimental information on the statistical features of the observed particle distributions. Our three-stage study incorporates the fluctuations of parton production in the early phase, the effect of intermediate hydrodynamic evolution, as well as fluctuations in the production of particles at freeze-out. We investigate the dependence of the results on the features of the overlaid distributions and hydrodynamics, as well as the centrality dependence. We analyze the existing data from the STAR Collaboration. Predictions for the forward-backward multiplicity correlations in Pb+Pb collisions to be analyzed at the LHC are also made.
description: 8 pages, 3 figures, improved analysis of the STAR data
ALMA ACA study of the H$_2$S/OCS ratio in low-mass protostars
Creators: name: Kushwahaa, Tanya
name: Drozdovskaya, Maria N.
name: Tychoniec, Łukasz
name: Tabone, Benoît
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The identification of the main sulfur reservoir on its way from the diffuse interstellar medium to the cold dense star-forming cores and eventually to protostars is a long-standing problem. Despite sulfur's astrochemical relevance, the abundance of S-bearing molecules in dense cores and regions around protostars is still insufficiently constrained. The goal of this investigation is to derive the gas-phase H$_2$S/OCS ratio for several low-mass protostars, which could provide crucial information about the physical and chemical conditions in the birth cloud of Sun-like stars. Using ALMA ACA Band 6 observations, H$_2$S, OCS, and their isotopologs are searched for in 10 Class 0/I protostars with different source properties such as age, mass, and environmental conditions. An LTE model is used to fit synthetic spectra to the detected lines and to derive the column densities based solely on optically thin lines. The H$_2$S and OCS column densities span four orders of magnitude across the sample. The H$_2$S/OCS ratio is found to be in the range from 0.2 to above 9.7. IRAS 16293-2422 A and Ser-SMM3 have the lowest ratio, while BHR71-IRS1 has the highest. Only the H$_2$S/OCS ratio of BHR71-IRS1 agress within uncertainties with the ratio in comet 67P/C$-$G. The determined gas-phase H$_2$S/OCS ratios can be below the upper limits on the solid-state ratios by as much as an order of magnitude. The H$_2$S/OCS ratio depends significantly on the environment of the birth cloud, such as UV-irradiation and heating received prior to the formation of a protostar. The highly isolated birth environment of BHR71-IRS1 is hypothesized to be the reason for its high gaseous H$_2$S/OCS ratio due to lower rates of photoreactions and more efficient hydrogenation reactions under such dark, cold conditions. The gaseous inventory of S-bearing molecules in BHR71-IRS1 appears to be most similar to that of interstellar ices.
description: Accepted for publication in A&A; 32 pages, 24 figures, 18 tables
title: Heavy and extra heavy oils: midstream processes and transportation
Creators: name: Αργυροπουλου Χριστινα
Publisher: name: Technical University of Crete
Year: 2017

description: The gradually growing energy demands have created a large interest towards the vast unconventional oil reserves that include heavy oils, extra heavy oils and bitumens, the exploitation of which is particularly challenging. These hydrocarbons exhibit high Specific Gravity, high viscosity, low mobility and increased content in asphaltenes, resins and N, S, O heteroatoms.
This thesis is focused on the exploitation of heavy and extra heavy oils that have ˚API gravity coarsely from 20 to below of 10 and a viscosity between 100 and 10.000 cP as well as on the implemented or emerging techniques for their recovery, surface processing and transportation. The main characteristics of heavy and extra heavy oils are presented and analyzed with respect to the oil properties that affect their flowability during production. The detrimental effect of asphaltene, wax and scale precipitation, the role of naphthenates and naphthenic acids, the formation of stable emulsions and the foamy and slug flow tendencies during the production of heavy/viscous oils are also covered.
The recovery methods used for the extraction of heavy and extra heavy oils are presented. Special reference is made in enhanced oil recovery methods including both thermal and non-thermal EOR techniques. The oil treatment is described in detail with the available options which include mechanical, thermal, chemical and electrostatic treatment or, more often, a combination of these. Electrostatic treatment is especially highlighted due to the variety of applications in dehydration and desalting, the energy efficiency and the ability to reduce the dosage on chemical demulsifiers. Additionally, the advances attained in the past fifteen years have allowed the use of the electrostatic separation systems in first-stage separators or pipeline segments.
Finally, a review of the available technologies for pipeline transportation of heavy and extra heavy crude oils is conducted. The review is based on viscosity and friction reduction options as well as on the in situ and partial upgrading on site. The fundamentals of mechanical separation, as well as a number of case studies are cited in the appendices.
Beyond the Unnameable
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Social conflict
Radio talk shows

description: Callers talk about what they are hearing on other radio shows, on and off WBAI. Discussion of Bertolt Brecht, dramatization of fiction about overpopulation ('The Space Merchants' by Frederik Pohl and Cyril Kornbluth), a rewritten Declaration of Independence by Atlanta listeners, existence of late night call-in shows other than Fass's. Bob defends the existence of government and regulation. Bob defends callers to radio programs in the South, saying that there is real American weirdness all over the country. Callers discuss problem of unemployment and government overspending at cost of citizen inequality. Bob continues to advocate for government. Callers discuss fear that police will be federalized
Zur Empfehlung Lieberg (FC 4/2001, 262)
Creators: name: Binder, Gerhard
name: Effe, Bernhard
name: Glei, Reinhold F.
name: Paulsen, Thomas
Publisher: name: Forum Classicum
Year: 2017

description: -
description: Forum Classicum, Nr. 1 (2002): Forum Classicum
Time Domain Generalization of the Random Coupling Model and Experimental Verification in a Complex Scattering System
Creators: name: Ma, Shukai
name: Antonsen, Thomas M.
name: Anlage, Steven M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Electromagnetic (EM) wave scattering in electrically large, irregularly shaped, environments is a common phenomenon. The deterministic, or first principles, study of this process is usually computationally expensive and the results exhibit extreme sensitivity to scattering details. For this reason, the deterministic approach is often dropped in favor of a statistical one. The Random Coupling Model (RCM) is one such approach that has found great success in providing a statistical characterization for wave chaotic systems in the frequency domain. Here we aim to transform the RCM into the time domain and generalize it to new situations. The proposed time-domain RCM (TD-RCM) method can treat a wave chaotic system with multiple ports and modes. Two features are now possible with the time-domain approach for chaotic resonators: the incorporation of earlytime short-orbit transmission path effects between the ports, and the inclusion of arbitrary nonlinear or time-varying port load impedances. We have conducted short-pulse time-domain experiments in wave chaotic enclosures, and used the TD-RCM to simulate the corresponding experimental setup. We have also examined a diode-loaded port and compared experimental results with a numerical TD-RCM treatment and found agreement.
Berichte aus den Naturland Forschungsprojekten. 8. ECOBREED
Creators: name: Naturland e.V.
Publisher: name: Zenodo
Year: 2022
Subjects: organic farming
participatory breeding
Glycine max - soybean
yield
Solanum tuberosum - potato
late blight resistance

description: Description of the H2020 project ECOBREED and activities carried out within this project by Naturland e.V. Presentation of of soybean yields in 2021 realised in organic farmers' trials in Austria and Germany.
On the anticyclotomic Iwasawa main conjecture for modular forms
Creators: name: Chida, Masataka
name: Hsieh, Ming-Lun
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We generalize the work of Bertolini and Darmon on the anticyclotomic main conjecture for weight two forms to higher weight modular forms.
description: The hypothesis (CR+) (3-4) is revised
Multiple Kernel Sparse Representations for Supervised and Unsupervised Learning
Creators: name: Thiagarajan, Jayaraman J.
name: Ramamurthy, Karthikeyan Natesan
name: Spanias, Andreas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In complex visual recognition tasks it is typical to adopt multiple descriptors, that describe different aspects of the images, for obtaining an improved recognition performance. Descriptors that have diverse forms can be fused into a unified feature space in a principled manner using kernel methods. Sparse models that generalize well to the test data can be learned in the unified kernel space, and appropriate constraints can be incorporated for application in supervised and unsupervised learning. In this paper, we propose to perform sparse coding and dictionary learning in the multiple kernel space, where the weights of the ensemble kernel are tuned based on graph-embedding principles such that class discrimination is maximized. In our proposed algorithm, dictionaries are inferred using multiple levels of 1-D subspace clustering in the kernel space, and the sparse codes are obtained using a simple levelwise pursuit scheme. Empirical results for object recognition and image clustering show that our algorithm outperforms existing sparse coding based approaches, and compares favorably to other state-of-the-art methods.
Underground Testing: Name-Altering Practices as Probes in Electronic Music
Creators: name: Stark, David C.
name: Formilan, Giovanni
Publisher: name: Columbia University
Year: 2020
Subjects: subject: Electronic music
subject: Anonyms and pseudonyms
subject: Subculture
subject: Identity (Psychology) in art
subject: Sociology
subject: FOS: Sociology

description: Name-altering practices are common in many creative fields – pen names in literature, stage names in the performing arts, aliases in music. More than just reflecting artistic habits or responding to the need for distinctive brands, these practices can also serve as test devices to probe, validate, and guide the artists’ active participation in a cultural movement. At the same time, they constitute a powerful probe to negotiate the boundaries of a subculture, especially when its features are threatened by appropriation from the mass-oriented culture. Drawing evidence from electronic music, a field where name-altering practices proliferate, we outline dynamics of pseudonymity, polyonymy, and anonymity that surround the use of aliases. We argue that name-altering practices are both a tool artists use to probe the creative environment and a device to recursively put one’s creative participation to the test. In the context of creative subcultures, name-altering practices constitute a subtle but effective form of underground testing.
Directional genetic differentiation and asymmetric migration
Creators: name: Sundqvist, Lisa
name: Keenan, Kevin
name: Zackrisson, Martin
name: Prodöhl, Paulo
name: Kleinhans, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: Understanding the population structure and patterns of gene flow within species is of fundamental importance to the study of evolution. In the fields of population and evolutionary genetics, measures of genetic differentiation are commonly used to gather this information. One potential caveat is that these measures assume gene flow to be symmetric. However, asymmetric gene flow is common in nature, especially in systems driven by physical processes such as wind or water currents. Since information about levels of asymmetric gene flow among populations is essential for the correct interpretation of the distribution of contemporary genetic diversity within species, this should not be overlooked. To obtain information on asymmetric migration patterns from genetic data, complex models based on maximum likelihood or Bayesian approaches generally need to be employed, often at great computational cost. Here, a new simpler and more efficient approach for understanding gene flow patterns is presented. This approach allows the estimation of directional components of genetic divergence between pairs of populations at low computational effort, using any of the classical or modern measures of genetic differentiation. These directional measures of genetic differentiation can further be used to calculate directional relative migration and to detect asymmetries in gene flow patterns. This can be done in a user-friendly web application called divMigrate-online introduced in this paper. Using simulated data sets with known gene flow regimes, we demonstrate that the method is capable of resolving complex migration patterns under a range of study designs.
description: 25 pages, 8 (+3) figures, 1 table
Zur Lage des altsprachlichen Unterrichts in der Bundesrepublik Deutschland (Schuljahr 2000/2001). Bericht vor der Vertreterversammlung in Dresden am 2. 4. 2002
Creators: name: Scheda, Gunther
name: Schmitz, Dietmar
Publisher: name: Forum Classicum
Year: 2017

description: -
description: Forum Classicum, Nr. 2 (2002): Forum Classicum
The Performance Complex
Creators: name: Stark, David C.
Publisher: name: Columbia University
Year: 2020
Subjects: subject: Performance
subject: Performance--Measurement
subject: Social status
subject: Sociology
subject: FOS: Sociology

description: What’s valuable? Market competition provides one kind of answer. But competitions offer another. On one side, competition is an ongoing and seemingly endless process of pricings; on the other, competitions are discrete and bounded in time and location, with entry rules, judges, scores, and prizings. Here I examine what happens when ever more activities in many domains of everyday life are evaluated and experienced in terms of performance metrics. The ratings and rankings of such systems do not have prices but are more like the prizes of competitions. Yet unlike organized competitions, they are ceaseless and without formal entry. Instead of producing resolutions, their scorings create addictions. In the performance society, networks of observation – in which all are performing and all keeping score – are entangled with a system of emotionally charged preoccupations with one’s positioning within the rankings. We refer to this assemblage of metrics, networks, and their attendant emotional pathologies as the performance complex.
title: Συγκριτική γεωχημική αξιολόγηση πετρελαίων της λεκάνης του Πρίνου με τη χρήση βιοδεικτών
Creators: name: Παπακωνσταντινου Αικατερινη
Publisher: name: Technical University of Crete
Year: 2017

description: Η ταυτοποίηση και η ποσοτικοποίηση των βιοδεικτών αποτελεί πλέον αναπόσπαστο κομμάτι των οργανικών γεωχημικών αναλύσεων, ειδικά στον εντοπισμό σχηματισμών πετρελαίου. Πρόκειται για  οργανικές ενώσεις που εντοπίζονται στο πετρέλαιο, στους γαιάνθρακες και εν γένει σε όλα τα ορυκτά καύσιμα οργανικής προέλευσης και χρησιμοποιούνται στον προσδιορισμό του είδους της πρόδρομης οργανικής ύλης αλλά και στον προσδιορισμό του βαθμού ωρίμανσης και βιοαποδόμησης καθώς επίσης και στην εκτίμηση του περιβάλλοντος γένεσης του πετρελαίου.
    Στη παρούσα διπλωματική εργασία πραγματοποιήθηκε οργανική γεωχημική ανάλυση 22 δειγμάτων πετρελαίου που προέρχονται από τη λεκάνη του Πρίνου –Καβάλας στη Βόρεια Ελλάδα, και συγκεκριμένα από τη γεώτρηση PN-2 (Βόρειος Πρίνος). O σκοπός της μελέτης, ήταν η αξιολόγηση των αποτελεσμάτων που προέκυψαν με τη χρήση της μεθόδου της αέριας χρωματογραφίας - φασματοσκοπίας μάζας και η συγκριτική αποτίμηση τους με τα αποτελέσματα αντίστοιχων μελετών που είναι διαθέσιμα στη βιβλιογραφία. Από την ανάλυση αυτή, τα αποτελέσματα της οποίας εμπλουτίζουν τα μέχρι σήμερα δημοσιευμένα στοιχεία για το κοίτασμα του Βόρειου Πρίνου, επιβεβαιώνεται ότι πρόκειται για θερμικά ανώριμο πετρέλαιο που δημιουργήθηκε σε αργιλικούς μητρικούς σχηματισμούς και σε περιβάλλον υψηλή αλατότητας, το οποίο δεν έχει υποστεί βιοαπόδομηση. Εντοπίζεται επίσης συμμετοχή χερσογενούς οργανικού υλικού στην πρόδρομη οργανική ύλη, σε διαφορετικό ποσοστό στα διάφορα βάθη του σχηματισμού.
New Objects in Scattering Theory with Symmetries
Creators: name: Losev, Andrey S.
name: Sulimov, Tim V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider 1D quantum scattering problem for a Hamiltonian with symmetries. We show that the proper treatment of symmetries in the spirit of homological algebra leads to new objects, generalizing the well known T- and K-matrices. Homological treatment implies that old objects and new ones are be combined in a differential. This differential arises from homotopy transfer of induced interaction and symmetries on solutions of free equations of motion. Therefore, old and new objects satisfy remarkable quadratic equations. We construct an explicit example in SUSY QM on $S^1$ demonstrating nontriviality of the above relation.
Positivity of Thom polynomials and Schubert calculus
Creators: name: Pragacz, Piotr
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 05E05, 14C17, 14M15, 14N10, 14N15, 32S20, 55R40, 57R45

description: We describe the positivity of Thom polynomials of singularities of maps, Lagrangian Thom polynomials and Legendrian Thom polynomials. We show that these positivities come from Schubert calculus.
description: 27 pages; v4: final version
Dynamic and Thermodynamic Stability of Charged Perfect Fluid Stars
Creators: name: Shi, Kai
name: Tian, Yu
name: Wu, Xiaoning
name: Zhang, Hongbao
name: Zhang, Jingchao
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We perform a thorough analysis of the dynamic and thermodynamic stability for the charged perfect fluid star by applying the Wald formalism to the Lagrangian formulation of Einstein-Maxwell-charged fluid system. As a result, we find that neither the presence of the additional electromagnetic field nor the Lorentz force experienced by the charged fluid makes any obstruction to the key steps towards the previous results obtained for the neutral perfect fluid star. Therefore, the criterion for the dynamic stability of our charged star in dynamic equilibrium within the symplectic complement of the trivial perturbaions with the ADM $3$-momentum unchanged is given by the non-negativity of the canonical energy associated with the timelike Killing field, where it is further shown for both non-axisymmetric and axisymmetric perturbations that the dynamic stability against these restricted perturbations also implies the dynamic stability against more generic perturbations. On the other hand, the necessary condition for the thermodynamic stability of our charged star in thermodynamic equilibrium is given by the positivity of the canonical energy of all the linear on-shell perturbations with the ADM angular momentum unchanged in the comoving frame, which is equivalent to the positivity of the canonical energy associated with the timelike Killing field when restricted onto the axisymmetric perturbations. As a by-product, we further establish the equivalence of the dynamic and thermodynamic stability with respect to the spherically symmetric perturbations of the static, spherically symmetric isentropic charged star.
description: 20 pages, 1 figure, typos corrected, to appear in CQG
Greenberger-Horne-Zeilinger theorem for N qudits
Creators: name: Ryu, Junghee
name: Lee, Changhyoup
name: Zukowski, Marek
name: Lee, Jinhyoung
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We generalize Greenberger-Horne-Zeilinger (GHZ) theorem to an arbitrary number of D-dimensional systems. Contrary to conventional approaches using compatible composite observables, we employ incompatible and concurrent observables, whose common eigenstate is still a generalized GHZ state. It is these concurrent observables which enable to prove a genuinely N-partite and D-dimensional GHZ theorem. Our principal idea is illustrated for a four-partite system with D which is an arbitrary multiple of 3. By extending to N qudits, we show that GHZ theorem holds as long as N is not divisible by all nonunit divisors of D, smaller than N.
description: 5 pages, journal version
Absorption signatures of warm-hot gas at low redshift: NeVIII
Creators: name: Tepper-Garcia, Thor
name: Richter, Philipp
name: Schaye, Joop
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: At z<1 a large fraction of the baryons is thought to reside in diffuse gas that has been shock-heated to high temperatures (log T=5-6). Absorption by the 770.41, 780.32 Å doublet of NeVIII in quasar spectra represents a unique tool to study this elusive warm-hot phase. We have developed an analytic model for the properties of NeVIII absorbers that allows for an inhomogeneous metal distribution. Our model agrees with the predictions of a simulation from the OWLS project indicating that the average line-of-sight metal-filling fraction within the absorbing gas is low (c_L~0.1). Most of the NeVIII in our model is produced in low-density, collisionally ionized gas (log n=-6 to -4 cm^-3, log T=5-6). Strong NeVIII absorbers (log N(NeVIII)>14), like those recently detected by HST/COS, are found to arise in higher density gas (log n>-4, log T=5.75). NeVIII cloudlets harbour only 1 per cent of the cosmic baryon budget. The baryon content of the surrounding gas (which has similar densities and temperatures as the NeVIII cloudlets) is a factor 1/c_L higher. We conclude that NeVIII absorbers are robust probes of shock-heated diffuse gas, but that spectra with signal-to-noise ratios S/N>100 would be required to detect the bulk of the baryons in warm-hot gas.
description: 19 pages, 10 figures; MNRAS in press; minor changes with respect to v1
A Mini-Chemical Scheme with Net Reactions for 3D GCMs II. 3D thermochemical modelling of WASP-39b and HD 189733b
Creators: name: Lee, Elspeth K. H.
name: Tsai, Shang-Min
name: Hammond, Mark
name: Tan, Xianyu
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The chemical inventory of hot Jupiter (HJ) exoplanets atmospheres continue to be observed by various ground and space based instruments in increasing detail and precision. It is expected that some HJs will exhibit strong non-equilibrium chemistry characteristics in their atmospheres, which might be inferred from spectral observations. We aim to model the three dimensional thermochemical non-equilibrium chemistry in the atmospheres of the HJs WASP-39b and HD 189733b. We couple a lightweight, reduced chemical network `mini-chem' that utilises net reaction rate tables to the Exo-FMS General Circulation Model (GCM). We perform GCM models of the exoplanets WASP-39b and HD 189733b as case studies of the coupled mini-chem scheme. The GCM results are then post-processed using the 3D radiative-transfer model gCMCRT to produce transmission and emission spectra to assess the impact of non-equilibrium chemistry on their observable properties. Both simulations show significant departures from chemical equilibrium (CE) due to the dynamical motions of the atmosphere. The spacial distribution of species generally follows closely the dynamical features of the atmosphere rather than the temperature field. Each molecular species exhibits a different quench level in the simulations, also dependent on the latitude of the planet. Major differences are seen in the transmission and emission spectral features between the CE and kinetic models. Our simulations indicate that considering the 3D kinetic chemical structures of HJ atmospheres has an important impact on physical interpretation of observational data. Drawing bulk atmospheric parameters from fitting feature strengths may lead to inaccurate interpretation of chemical conditions in the atmosphere of HJs. Our open source mini-chem module is simple to couple with contemporary HJ GCM models without substantially increasing required computational resources.
description: A&A Accepted 17 Feb 2023
Dijet azimuthal decorrelations at the LHC in the parton Reggeization approach
Creators: name: Nefedov, M. A.
name: Saleev, V. A.
name: Shipilova, A. V
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study inclusive dijet azimuthal decorrelations in proton-proton collisions at the CERN LHC invoking the hypothesis of parton Reggeization in t-channel exchanges at high energies. In the parton Reggeization approach, the main contribution to the azimuthal angle difference between the two most energetic jets is due to the Reggeon-Reggeon-Particle-Particle scattering, when the fusion of two Reggeized gluons into a pair of Yang-Mills gluons dominates. Using a high-energy factorization scheme with the Kimber-Martin-Ryskin unintegrated parton distribution functions and the Fadin-Lipatov effective vertices we obtain good agreement of our calculations with recent measurements by the ATLAS and CMS Collaborations at the CERN LHC.
description: 23 pages, 3 figures, corrected version (see Erratum)
Finding Heterophilic Neighbors via Confidence-based Subgraph Matching for Semi-supervised Node Classification
Creators: name: Choi, Yoonhyuk
name: Choi, Jiho
name: Ko, Taewook
name: Kim, Chong-Kwon
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Graph Neural Networks (GNNs) have proven to be powerful in many graph-based applications. However, they fail to generalize well under heterophilic setups, where neighbor nodes have different labels. To address this challenge, we employ a confidence ratio as a hyper-parameter, assuming that some of the edges are disassortative (heterophilic). Here, we propose a two-phased algorithm. Firstly, we determine edge coefficients through subgraph matching using a supplementary module. Then, we apply GNNs with a modified label propagation mechanism to utilize the edge coefficients effectively. Specifically, our supplementary module identifies a certain proportion of task-irrelevant edges based on a given confidence ratio. Using the remaining edges, we employ the widely used optimal transport to measure the similarity between two nodes with their subgraphs. Finally, using the coefficients as supplementary information on GNNs, we improve the label propagation mechanism which can prevent two nodes with smaller weights from being closer. The experiments on benchmark datasets show that our model alleviates over-smoothing and improves performance.
description: Proceedings of the 31st ACM International Conference on Information & Knowledge Management
title: Pressure maintenance in oil production pipelines: equipment and simulation
Creators: name: Δαλαμαγκα Δημητρα
Publisher: name: Technical University of Crete
Year: 2017

description: The oil production in every well will ultimately decline after some production period and “intense” treatment of the reservoir, the well and/or the surface flowlines will be necessary to maintain the production at an economically viable rate. The oil recovery methods are distinguished in three major categories: primary, secondary and enhanced oil recovery. From the aforementioned categories, only the second involves intervention to the midstream facilities. Pressure maintenance of the multiphase production fluids in the flowlines is a technique, which can be easily implemented in existing installations.
It may be implemented either by reducing the pressure with surface chokes and orifice plates or by boosting the pressure with new equipment (pumps and compressors).
Two primary factors of the pressure maintenance have to be studied in detail and
closely monitored: the flow assurance in the pipeline and the proper sizing and
selection of the pressure boosting equipment (pumps and compressors).
In this study, a research is conducted on multiphase flow assurance issues and
particularly the ones associated with the pressure boosting techniques. Several means of pressure control exist, for example changing the opening frequency and duration of flow valves and surface chokes and installation of orifice plates, but this study focuses on the application of multiphase pumps in line with the production flowlines both onshore and offshore (not inside the well). All major types of production multiphase pumps are presented in detail, together with their operational characteristics.
At the last part of the thesis, the performance of a multiphase pump in an oilfield is simulated in order to demonstrate the utility of such novel systems in the oil midstream sector.
Infrared ellipsometry study of the charge dynamics in K3p-terphenyl
Creators: name: He, Qi
name: Marsik, P.
name: Mardelé, F. Le
name: Xu, B.
name: Sharma, Meenakshi
name: Pinto, N.
name: Perali, A.
name: Di Nicola, C.
name: Pettinari, C.
name: Baeriswyl, D.
name: Bernhard, C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: Optics (physics.optics)
subject: FOS: Physical sciences
subject: J.2.9
subject: 14J60

description: We report an infrared ellipsometry study of the charge carrier dynamics in polycrystalline Kxp-terphenyl samples with nominal $x=3$, for which signatures of high-temperature superconductivity were previously reported. The infrared spectra are dominated by two Lorentzian bands with maxima around 4 000 cm$^{-1}$ and 12 000 cm$^{-1}$ which, from a comparison with calculations based on a Hückel model are assigned to intra-molecular excitations of $π$ electrons of the anionic p-terphenyl molecules. The inter-molecular electronic excitations are much weaker and give rise to a Drude peak and a similarly weak Lorentzian band around 220 cm$^{-1}$. A dc resistivity of about 0.3 $Ω$ cm at 300 K is deduced from the IR data, comparable to values measured by electrical resistivity on a twin sample. The analysis of the temperature dependence of the low-frequency response reveals a gradual decrease of the plasma frequency and the scattering rate of the Drude peak below 300 K that gets anomalously enhanced below 90 K. The corresponding missing spectral weight of the Drude peak appears blue-shifted towards the Lorentz-band at 220 cm$^{-1}$. This characteristic blue-shift signifies an enhanced localization of the charge carriers at low temperatures and contrasts the behavior expected for a bulk superconducting state for which the missing spectral weight would be redshifted to a delta-function at zero frequency that accounts for the loss-free response of the superconducting condensate. Our data might still be compatible with a filamentary superconducting state with a volume fraction well below the percolation limit for which the spatial confinement of the condensate can result in a plasmonic resonance at finite frequency.
description: 12 pages, 7 figures
title: Performance of multivariate clustering methods in oil families' identification
Creators: name: Καραβουλια Χριστινα
Publisher: name: Technical University of Crete
Year: 2017

description: As science progresses, the need for analyzing multivariate data sets is growing by the minute. Multiple disciplines, either scientific or not, require the examination of large amounts of data, in a short period of time, in order to obtain useful information. During the recent few decades, multivariate statistical analysis methods have been developed, aiming to satisfy such purposes.
This dissertation deals with the implementation of multivariate data analysis methods on a given data set, derived from oil family affiliations, which originate from Williston Basin of North America. In particular, Hierarchical Clustering, k-means and Principal Component analysis have been applied on four independent models, in an attempt to extract information regarding the oil-oil correlations among the samples under study. The models used on the exploration of the compositional information were the Saturated Fraction Compositional Model, the Saturated Fraction Ratios Model, the Gasoline Range Compositional Model and the Biomarkers Compositional Model.
These standard statistical methods were found to be quite insufficient in classifying the sample set into distinct familial affiliations. For this reason, the need to examine the nature of the data set arose. Compositional data represent a category on their own as they are characterized by specific numerical properties which present significant consequences when being analyzed by standard multivariate techniques. The analysis of such type of data represents a whole new chapter in the world of statistics and the need for further examination on this matter is constantly growing.
[Gymnasium, Heft 123/1 (2016) / Gymnasium, Heft 123/4 (2016) / Heft 3/2016 der Zeitschrift Circulare ...]
Creators: name: Rabl, Josef
Publisher: name: Forum Classicum
Year: 2017

description: -
description: Forum Classicum, Nr. 4 (2016): Forum Classicum
Unit Cell Design for Aperiodic Metasurfaces
Creators: name: Budhu, Jordan
name: Ventresca, Nicholas
name: Grbic, Anthony
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: A technique is presented for the design of printed unit cells in aperiodic metasurface environments. The method begins with a solved matrix equation governing electromagnetic scattering from a homogenized metasurface design. The matrix equation is used to find the local, inhomogeneous electric field exciting a printed-circuit unit cell geometry. The local field is then impressed onto the printed circuit geometry and the induced surface current numerically computed. The computed surface current is sampled at the matrix equation discretization. The matrix equation is then used to compute the electric field scattered by the printed-circuit unit cell onto its neighbors using the sampled current in place of the current of the original homogenized unit cell. The printed circuit geometry is optimized to scatter the same field as the homogenized unit cell when excited with the local electric field computed. Two design examples are provided. Both a finite-sized, wide-angle reflecting metasurface, and a metasurface reflectarray designed to scan and collimate an incident cylindrical wave, are realized with printed-circuit unit cells using the proposed approach. It is shown that the local periodicity approximation cannot be used to accurately design the unit cells of either finite-sized metasurface.
Ellerbrock, Uwe / Winkelmann, Sylvia, Die Parther. Die vergessene Großmacht
Creators: name: Wissemann, Michael
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Ellerbrock, Uwe / Winkelmann, Sylvia, Die Parther. Die vergessene Großmacht, Darmstadt / Mainz (Philipp von Zabern) 2. Aufl. 2015, 368 S., 87 Abb., 4 Tab. (ISBN 978-3-8053-4828-7).
description: Forum Classicum, Nr. 4 (2016): Forum Classicum
Gauge Symmetry of the Chiral Schwinger model from an improved Gauge Unfixing formalism
Creators: name: Ambrosio, Gabriella V.
name: Costa, Cleber N.
name: Alves, Paulo R. F.
name: Abreu, Everton M. C.
name: Neto, Jorge Ananias
name: Thibes, Ronaldo
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, the Hamiltonian structure of the bosonized chiral Schwinger model (BCSM) is analyzed. From the consistency condition of the constraints obtained from the Dirac method, we can observe that this model presents, for certain values of the $α$ parameter, two second-class constraints, which means that this system does not possess gauge invariance. However, we know that it is possible to disclose gauge symmetries in such a system by converting the original second-class system into a first-class one. This procedure can be done through the gauge unfixing (GU) formalism by acting with a projection operator directly on the original second-class Hamiltonian, without adding any extra degrees of freedom in the phase space. One of the constraints becomes the gauge symmetry generator of the theory and the other one is disregarded. At the end, we have a first-class Hamiltonian satisfying a first-class algebra. Here, our goal is to apply a new scheme of embedding second-class constrained systems based on the GU formalism, named improved GU formalism, in the BCSM. The original second-class variables are directly converted into gauge invariant variables, called GU variables. We have verified that the Poisson brackets involving the GU variables are equal to the Dirac brackets between the original second-class variables. Finally, we have found that our improved GU variables coincide with those obtained from an improved BFT method after a particular choice for the Wess-Zumino terms.
description: 13 pages
On the Popov-Pommerening conjecture for linear algebraic groups
Creators: name: Bérczi, Gergely
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14L24, 13A50,

description: Let $G$ be a reductive group over an algebraically closed subfield $k$ of $\mathbb{C}$ of characteristic zero, $H \subseteq G$ an observable subgroup normalized by a maximal torus of $G$ and $X$ an affine $k$-variety acted on by $G$. Popov and Pommerening conjectured in the late 70's that the invariant algebra $k[X]^H$ is finitely generated. We prove the conjecture for 1) subgroups of $\mathrm{SL}_n(k)$ closed under left (or right) Borel action and for 2) a class of Borel regular subgroups of classical groups. We give a partial affirmative answer to the conjecture for general regular subgroups of $\mathrm{SL}_n(k)$.
description: 44 pages, revised version
การบูรณาการโค้ดดิ้งในการจัดเรียนการสอน
Creators: name: ฐานิตา แก้วศรี
Publisher: name: คณะสิ่งแวดล้อมและทรัพยากศาสตร์ มหาวิทยาลัยมหิดล
Year: 2566
Subjects: การจัดการเรียนการสอนแบบบูรณาการ
โค้ดดิ้ง
ทักษะการคิดเชิงคำนวณ

description: วารสารการพัฒนางานประจำสู่งานวิจัย, 10, 1, 1-10
AdaFocal: Calibration-aware Adaptive Focal Loss
Creators: name: Ghosh, Arindam
name: Schaaf, Thomas
name: Gormley, Matthew R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Much recent work has been devoted to the problem of ensuring that a neural network's confidence scores match the true probability of being correct, i.e. the calibration problem. Of note, it was found that training with focal loss leads to better calibration than cross-entropy while achieving similar level of accuracy \cite{mukhoti2020}. This success stems from focal loss regularizing the entropy of the model's prediction (controlled by the parameter $γ$), thereby reining in the model's overconfidence. Further improvement is expected if $γ$ is selected independently for each training sample (Sample-Dependent Focal Loss (FLSD-53) \cite{mukhoti2020}). However, FLSD-53 is based on heuristics and does not generalize well. In this paper, we propose a calibration-aware adaptive focal loss called AdaFocal that utilizes the calibration properties of focal (and inverse-focal) loss and adaptively modifies $γ_t$ for different groups of samples based on $γ_{t-1}$ from the previous step and the knowledge of model's under/over-confidence on the validation set. We evaluate AdaFocal on various image recognition and one NLP task, covering a wide variety of network architectures, to confirm the improvement in calibration while achieving similar levels of accuracy. Additionally, we show that models trained with AdaFocal achieve a significant boost in out-of-distribution detection.
description: Published in NeurIPS 2022. Official code: https://github.com/3mcloud/adafocal
Log-majorization of the moduli of the eigenvalues of a matrix polynomial by tropical roots
Creators: name: Akian, Marianne
name: Gaubert, Stephane
name: Sharify, Meisam
Publisher: name: arXiv
Year: 2013
Subjects: subject: Spectral Theory (math.SP)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 15A22, 15A80, 15A18, 47J10

description: We show that the sequence of moduli of the eigenvalues of a matrix polynomial is log-majorized, up to universal constants, by a sequence of "tropical roots" depending only on the norms of the matrix coefficients. These tropical roots are the non-differentiability points of an auxiliary tropical polynomial, or equivalently, the opposites of the slopes of its Newton polygon. This extends to the case of matrix polynomials some bounds obtained by Hadamard, Ostrowski and Pólya for the roots of scalar polynomials. We also obtain new bounds in the scalar case, which are accurate for "fewnomials" or when the tropical roots are well separated.
description: 36 pages, 19 figures
title: Μελέτη των ασυνεχειών των πετρωμάτων με τη βοήθεια της κλασματικής γεωμετρίας
Creators: name: Πασχαλίδου Ιωάννα
Publisher: name: Technical University of Crete
Year: 1995

description: Μη διαθέσιμο
Evolution of the Seasonal Surface Mixed Layer of the Ross Sea, Antarctica, Observed With Autonomous Profiling Floats
Creators: name: Porter, David F.
name: Springer, Scott R.
name: Padman, Laurie
name: Fricker, Helen A.
name: Tinto, Kirsteen J.
name: Riser, Stephen C.
name: Bell, Robin E.
name: ROSETTA-Ice Team
Publisher: name: Columbia University
Year: 2019
Subjects: subject: Oceanography
subject: FOS: Earth and related environmental sciences
subject: Oceanography--Observations
subject: Sea ice
subject: Sea ice--Environmental aspects

description: Oceanographic conditions on the continental shelf of the Ross Sea, Antarctica, affect sea ice production, Antarctic Bottom Water formation, mass loss from the Ross Ice Shelf, and ecosystems. Since ship access to the Ross Sea is restricted by sea ice in winter, most upper ocean measurements have been acquired in summer. We report the first multiyear time series of temperature and salinity throughout the water column, obtained with autonomous profiling floats. Seven Apex floats were deployed in 2013 on the midcontinental shelf, and six Air‐Launched Autonomous Micro Observer floats were deployed in late 2016, mostly near the ice shelf front. Between profiles, most floats were parked on the seabed to minimize lateral motion. Surface mixed layer temperatures, salinities, and depths, in winter were −1.8 °C, 34.34, and 250–500 m, respectively. Freshwater from sea ice melt in early December formed a shallow (20 m) surface mixed layer, which deepened to 50–80 m and usually warmed to above −0.5 °C by late January. Upper‐ocean freshening continued throughout the summer, especially in the eastern Ross Sea and along the ice shelf front. This freshening requires substantial lateral advection that is dominated by inflow from melting of sea ice and ice shelves in the Amundsen Sea and by inputs from the Ross Ice Shelf. Changes in upper‐ocean freshwater and heat content along the ice shelf front in summer affect cross‐ice front advection, ice shelf melting, and calving processes that determine the rate of mass loss from the grounded Antarctic Ice Sheet in this sector.
การศึกษาผลการประเมินตนเองด้านความรู้เนื้อหาผนวกวิธีสอนและเทคโนโลยี (TPACK) ของครูวิทยาศาสตร์สังกัดสำนักงานเขตพื้นที่การศึกษามัธยมศึกษากำแพงเพชร
Creators: name: ฐานิตา แก้วศรี
Publisher: name: คณะสิ่งแวดล้อมและทรัพยากศาสตร์ มหาวิทยาลัยมหิดล
Year: 2566
Subjects: ความรู้เนื้อหาผนวกวิธีสอนและเทคโนโลยี
ครูวิทยาศาสตร์
มัธยมศึกษา
การประเมินตนเอง

description: วารสารการพัฒนางานประจำสู่งานวิจัย, 10, 1, 11-18
Signature of proximity induced triplet superconductivity in junctions made of the doped topological insulator $\rm Bi_2Se_3$ and the s-wave superconductor NbN
Creators: name: Koren, Gad
name: Kirzhner, Tal
name: Kalcheim, Yoav
name: Millo, Oded
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Thin film junctions and bilayers of the doped topological insulator $\rm Bi_2Se_3$ and the s-wave superconductor NbN were found to exhibit conductance spectra with prominent zero bias and coherence peaks. Various tunneling models with different pair potentials have failed to fit our data, except for the triplet $p_x+ip_y$ pair potential, which breaks time reversal symmetry, but yielded reasonably good fits. This provides evidence for proximity induced triplet superconductivity in the $\rm Bi_2Se_3$ layer near the interface with the NbN film.
description: Accepted for publication in Europhysics Letters