cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Infiammazione e cancro: l'interazione COX-2/CA-IX promuove il potenziale invasivo e la sopravvivenza in ipossia delle cellule del cancro colon-rettale
Creators: name: Paterini, Paola <1973>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: BIO/09 Fisiologia

description: Cyclooxygenase-2/Carbonic anhydrase-IX up-regulation promotes invasive potential and hypoxia survival in colorectal cancer cells
Purpose: Cyclooxygenase-2 (COX-2) is a major mediator of inflammation, playing a pivotal role in colorectal carcinogenesis. Hypoxia is an universal hallmark of solid tumour in vivo. This investigation was prompted by the observation that in colorectal cancer cells the expression of COX-2 protein is positively correlated with that of the hypoxia survival gene Carbonic Anhydrase-IX (CA-IX). 
Experimental Design: Since COX-2 gene expression and activity is increased in hypoxia, and that CA-IX is expressed also in normoxia in colorectal cancer cells, we tested the hypothesis that COX-2 activity in normoxia, as well as in hypoxia may be functionally linked to that of CA-IX gene. We investigated the role of COX-2 and CA-IX in colorectal cancer cell lines. In this regard, we performed RNA interference to knockdown COX-2 gene in vitro and immunohistochemistry to evaluate the protein expression of COX-2 and CA-IX in human colon cancer tissue specimens ex vivo.
Results: We found that COX-2, by PGE2 production, controls CA-IX gene expression in an ERK dependent manner. In line with this finding, we also showed that the COX-2 inhibition by a specific short harpin COX-2 RNA (shCOX-2) or by a specific drug (SC-236), down-regulated CA-IX expression in colon cancer cells. We then exposed colon cancer cells to hypoxia stimuli and found that COX-2/CA-IX interplay promoted hypoxia survival. Moreover, we also report that COX-2/CA-IX interplay triggers Matrix Metalloproteinase 2/9 (MMP-2/9) activation and enhances the invasiveness of colorectal cancer cells. Thus given our above observations, we found that CA-IX and COX-2 protein expressions correlate with more aggressive stage colorectal cancer tissues ex vivo. 
Conclusions: Taken together these data indicate that COX-2/CA-IX interplay promotes an aggressive phenotype (hypoxia survival and invasiveness) which can be modulated in vitro by COX-2 selective inhibition and which may play a role in determining the biological aggressiveness of colorectal tumours. Moreover, in vitro and ex vivo data also suggest that the signatures of inflammation (COX-2) and hypoxia (CA-IX) may be difficult to be disentangled in colon cancer, being both responsible for the up-regulation of the same pathways.
Control of coherence resonance in semiconductor superlattices
Creators: name: Hizanidis, Johanne
name: Schoell, Eckehard
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study the effect of time-delayed feedback control and Gaussian white noise on the spatio-temporal charge dynamics in a semiconductor superlattice. The system is prepared in a regime where the deterministic dynamics is close to a global bifurcation, namely a saddle-node bifurcation on a limit cycle ({\it SNIPER}). In the absence of control, noise can induce electron charge front motion through the entire device, and coherence resonance is observed. We show that with appropriate selection of the time-delayed feedback parameters the effect of coherence resonance can either be enhanced or destroyed, and the coherence of stochastic domain motion at low noise intensity is dramatically increased. Additionally, the purely delay-induced dynamics in the system is investigated, and a homoclinic bifurcation of a limit cycle is found.
description: 7 pages, 7 figures
Synchronization and Detection Techniques for Navigation and Communication Systems
Creators: name: Palestini, Claudio <1982>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: ING-INF/03 Telecomunicazioni

description: Synchronization is a key issue in any communication system, but it becomes fundamental in the navigation systems, which are entirely based on the estimation of the time delay of the signals coming from the satellites. Thus, even if synchronization has been a well known topic for many years, the introduction of new modulations and new physical layer techniques in the modern standards makes the traditional synchronization strategies completely ineffective. For this reason, the design of advanced and innovative techniques for synchronization in modern communication systems, like DVB-SH, DVB-T2, DVB-RCS, WiMAX, LTE, and in the modern navigation system, like Galileo, has been the topic of the activity. Recent years have seen the consolidation of two different trends: the introduction of Orthogonal Frequency Division Multiplexing (OFDM) in the communication systems, and of the Binary Offset Carrier (BOC) modulation in the modern Global Navigation Satellite Systems (GNSS). Thus, a particular attention has been given to the investigation of the synchronization algorithms in these areas.
description: La sincronizzazione è un elemento chiave in ogni sistema di comunicazione, ma diventa fondamentale nei sistemi di navigazione, che sono basati sulla stima del ritardo di propagazione dei segnali provenienti dai satelliti. Quindi, nonostante la sincronizzazione sia stata studiata a lungo nel corso degli anni, l'introduzione di nuove modulazioni e nuove tecniche di strato fisico nei moderni standard ha reso le tradizionali strategie di sincronizzazione completamente inefficaci. Per questo motivo, il progetto di tecniche avanzate ed innovative per la sincronizzazione nei moderni sistemi di comunicazione, come DVB-SH, DVB-T2, DVB-RCS, WiMAX, LTE, e navigazione, come Galileo, è stato l'oggetto di questa attività. Inoltre, gli ultimi anni hanno visto il consolidamento di due differenti tendenze: l'introduzione dell'Orthogonal Frequency Division Multiplexing (OFDM) nei sistemi di comunicazione, e della modulazione Binary Offset Carrier (BOC) nei moderni sistemi Global Navigation Satellite Systems (GNSS), Quindi, particolare attenzione è stata dedicata allo studio di algoritmi di sincronizzazione in questi ambiti.
Short-time vs. long-time dynamics of entanglement in quantum lattice models
Creators: name: Unanyan, R. G.
name: Muth, D.
name: Fleischhauer, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We study the short-time evolution of the bipartite entanglement in quantum lattice systems with local interactions in terms of the purity of the reduced density matrix. A lower bound for the purity is derived in terms of the eigenvalue spread of the interaction Hamiltonian between the partitions. Starting from an initially separable state the purity decreases as $1 - (t/τ)^2$, i.e. quadratically in time, with a characteristic time scale $τ$ that is inversly proportional to the boundary size of the subsystem, i.e., as an area-law. For larger times an exponential lower bound is derived corresponding to the well-known linear-in-time bound of the entanglement entropy. The validity of the derived lower bound is illustrated by comparison to the exact dynamics of a 1D spin lattice system as well as a pair of coupled spin ladders obtained from numerical simulations.
description: some minor additions, 6 pages, 3 figures
Jet Shapes and Jet Algorithms in SCET
Creators: name: Ellis, Stephen D.
name: Hornig, Andrew
name: Lee, Christopher
name: Vermilion, Christopher K.
name: Walsh, Jonathan R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Jet shapes are weighted sums over the four-momenta of the constituents of a jet and reveal details of its internal structure, potentially allowing discrimination of its partonic origin. In this work we make predictions for quark and gluon jet shape distributions in N-jet final states in e+e- collisions, defined with a cone or recombination algorithm, where we measure some jet shape observable on a subset of these jets. Using the framework of Soft-Collinear Effective Theory, we prove a factorization theorem for jet shape distributions and demonstrate the consistent renormalization-group running of the functions in the factorization theorem for any number of measured and unmeasured jets, any number of quark and gluon jets, and any angular size R of the jets, as long as R is much smaller than the angular separation between jets. We calculate the jet and soft functions for angularity jet shapes τ_a to one-loop order (O(alpha_s)) and resum a subset of the large logarithms of τ_a needed for next-to-leading logarithmic (NLL) accuracy for both cone and kT-type jets. We compare our predictions for the resummed τ_a distribution of a quark or a gluon jet produced in a 3-jet final state in e+e- annihilation to the output of a Monte Carlo event generator and find that the dependence on a and R is very similar.
description: 62 pages plus 21 pages of Appendices, 13 figures, uses JHEP3.cls. v2: corrections to finite parts of NLO jet functions, minor changes to plots, clarified discussion of power corrections. v3: Journal version. Introductory sections significantly reorganized for clarity, classification of logarithmic accuracy clarified, results for non-Mercedes-Benz configurations added
On $τ^{(2)}$-model in Chiral Potts Model and Cyclic Representation of Quantum Group $U_q(sl_2)$
Creators: name: Roan, Shi-shyr
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We identify the precise relationship between the five-parameter $τ^{(2)}$-family in the $N$-state chiral Potts model and XXZ chains with $U_q (sl_2)$-cyclic representation. By studying the Yang-Baxter relation of the six-vertex model, we discover an one-parameter family of $L$-operators in terms of the quantum group $U_q (sl_2)$. When $N$ is odd, the $N$-state $τ^{(2)}$-model can be regarded as the XXZ chain of $U_{\sf q} (sl_2)$ cyclic representations with ${\sf q}^N=1$. The symmetry algebra of the $τ^{(2)}$-model is described by the quantum affine algebra $U_{\sf q} (\hat{sl}_2)$ via the canonical representation. In general for an arbitrary $N$, we show that the XXZ chain with a $U_q (sl_2)$-cyclic representation for $q^{2N}=1$ is equivalent to two copies of the same $N$-state $τ^{(2)}$-model.
description: Latex 11 pages; Typos corrected, Minor changes for clearer presentation, References added and updated-Journal version
An analytical approach to initiation of propagating fronts
Creators: name: Idris, I.
name: Biktashev, V. N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We consider the problem of initiation of a propagating wave in a one-dimensional excitable fibre. In the Zeldovich-Frank-Kamenetsky equation, a.k.a. Nagumo equation, the key role is played by the "critical nucleus'' solution whose stable manifold is the threshold surface separating initial conditions leading to initiation of propagation and to decay. Approximation of this manifold by its tangent linear space yields an analytical criterion of initiation which is in a good agreement with direct numerical simulations.
description: 4 pages, 2 figures, submitted to Phys Rev Letters
5D gravitational waves from complexified black rings
Creators: name: Bretón, N.
name: Feinstein, A.
name: López, L. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we construct and briefly study the 5D time-dependent solutions of general relativity obtained via double analytic continuation of the black hole (Myers-Perry) and of the black ring solutions with a double (Pomeransky-Senkov) and a single rotation (Emparan-Reall). The new solutions take the form of a generalized Einstein-Rosen cosmology representing gravitational waves propagating in a closed universe. In this context the rotation parameters of the rings can be interpreted as the extra wave polarizations, while it is interesting to state that the waves obtained from Myers-Perry Black holes exhibit an extra boost-rotational symmetry in higher dimensions which signals their better behavior at null infinity. The analogue to the C-energy is analyzed.
description: 18 pages, 4 figures. References added, introduction and conclusions are amended, some issues related to singularity structure and symmetries are discussed. Matches the print version to appear in JHEP
Raninia genalis DILLER 1985
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Raninia
Raninia genalis

description: Raninia genalis DILLER, 1985
M a t e r i a l e x a m i n e d: Trap 4: 1♀ 20.iv.-5.v.
D i s t r i b u t i o n: Western Palaearctic, new record for Georgia and the Caucasus region.
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 95, DOI: 10.5281/zenodo.10415120
Phase sensitive measurements of order parameters for ultracold atoms through two particles interferometry
Creators: name: Kitagawa, Takuya
name: Aspect, Alain
name: Greiner, Marcus
name: Demler, Eugene
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Nontrivial symmetry of order parameters is crucial in some of the most interesting quantum many-body states of ultracold atoms and condensed matter systems. Examples in cold atoms include p-wave Feshbach molecules and d-wave paired states of fermions that could be realized in optical lattices in the Hubbard regime. Identifying these states in experiments requires measurements of the relative phase of different components of the entangled pair wavefunction. We propose and discuss two schemes for such phase sensitive measurements, based on two-particle interference revealed in atom-atom or atomic density correlations. Our schemes can also be used for relative phase measurements for non-trivial particle-hole order parameters, such as d-density wave order.
description: 4 pages, 4 figures
The Turing Way Practitioners Hub 2024 Kick Off!
Creators: name: Sharan, Malvika
Publisher: name: Zenodo
Year: 2024

description: The Turing Way Practitioners Hub is an extension of The Turing Way that engages and involves industry experts, called Experts in Residence (EiRs), from partnering organisations. This initiative aims to advance their efforts in promoting best practices in data science and AI, especially around open source, open data and reproducibility. 

The second cohort of the Practitioners Hub was launched in September 2024: https://www.turing.ac.uk/turing-way-practitioners-hub/eirs.

The Practitioners Hub serves as a platform for cross-sector collaboration, knowledge exchange, and strategic partnerships, spanning various sectors and data science initiatives, including but not limited to the small and medium-sized (SME) enterprises in the BridgeAI network. By leveraging a cohort-based approach, we build a shared understanding of open source principles, open data practices, cross-sector collaboration, research reproducibility, and ethical considerations in the context of data science and AI. EiRs are supported in developing case studies with stakeholders in their networks, sharing insights into the successes and challenges associated with the adoption of AI within their respective sectors. This is combined with customised training, expert consultation, and collaborative opportunities, which contribute to the improvement and adoption of data science practices that enhance the quality, viability, and real-world impact of data science and AI technologies in their sectors.
SMA Imaging of CO(3-2) Line and 860 micron Continuum of Arp 220 : Tracing the Spatial Distribution of Luminosity
Creators: name: Sakamoto, Kazushi
name: Wang, Junzhi
name: Wiedner, Martina C.
name: Wang, Zhong
name: Peck, Alison B.
name: Zhang, Qizhou
name: Petitpas, Glen R.
name: Ho, Paul T. P.
name: Wilner, David J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We used the Submillimeter Array (SMA) to image 860 micron continuum and CO(3-2) line emission in the ultraluminous merging galaxy Arp 220, achieving a resolution of 0.23" (80 pc) for the continuum and 0.33" (120 pc) for the line. The CO emission peaks around the two merger nuclei with a velocity signature of gas rotation around each nucleus, and is also detected in a kpc-size disk encompassing the binary nucleus. The dust continuum, in contrast, is mostly from the two nuclei. The beam-averaged brightness temperature of both line and continuum emission exceeds 50 K at and around the nuclei, revealing the presence of warm molecular gas and dust. The dust emission morphologically agrees with the distribution of radio supernova features in the east nucleus, as expected when a starburst heats the nucleus. In the brighter west nucleus, however, the submillimeter dust emission is more compact than the supernova distribution. The 860 micron core, after deconvolution, has a size of 50-80 pc, consistent with recent 1.3 mm observations, and a peak brightness temperature of (0.9-1.6)x10^2 K. Its bolometric luminosity is at least 2x10^{11} Lsun and could be ~10^{12} Lsun depending on source structure and 860 micron opacity, which we estimate to be of the order of tau_{860} ~ 1 (i.e., N_{H_2} ~ 10^{25} cm^{-2}). The starbursting west nuclear disk must have in its center a dust enshrouded AGN or a very young starburst equivalent to hundreds of super star clusters. Further spatial mapping of bolometric luminosity through submillimeter imaging is a promising way to identify the heavily obscured heating sources in Arp 220 and other luminous infrared galaxies.
description: ApJ. in press. 26 pages, 10 figures
Fields from a relativistic magnetic explosion
Creators: name: Gourgouliatos, K. N.
name: Lynden-Bell, D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Following Prendergast we study the relativistically expanding electromagnetic fields generated by an axisymmetric explosion of magnetic energy in a small volume. The magnetic field expands uniformly either within a cone or in all directions and it is therefore accompanied by an electric field. In the highly conducting plasma the charges move to annul the electric field in the frame of the moving plasma. The solutions presented are analytical and semi-analytical. We find that the time-scale for the winding up of the initial magnetic field is crucial, as short time-scales lead to strong radiant fields. Assuming a magnetic field of $10^{13}Gauss$ emerging from a magnetosphere of $10^{9}cm$ we end with a jet when confined by a pressure environment that falls more slowly than $r^{-4}$. The jet carries energy of $10^{51}erg$, which is mostly due to differential rotation at the base.
description: 17 pages, 11 figures, accepted for publication in MNRAS
Project Financing nelle Infrastrutture del Trasporto
Project Financing in the transport infrastructure
Creators: name: Malaguti, Paolo <1979>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2013
Subjects: IUS/06 Diritto della navigazione

description: L’elaborato ha avuto ad oggetto l’analisi delle sofisticate soluzioni normative proposte dall’ordinamento nazionale in relazione all’evoluzione della finanza di progetto.
In particolare, è stata condotto un dettagliato studio delle fasi che compongono il project financing, nonché dei soggetti che, a diverso titolo e ragione, vi partecipano.
L’elaborato contiene, poi, recenti esempi concreti di project financing nelle infrastrutture primarie (autostrade) tra cui il progetto di costruzione e la successiva gestione dell’autostrada regionale Medio Padana veneta, dell’autostrada regionale Cispadana, e dell’autostrada “Nogara-mare”.
L’ultimo parte della tesi è stata infine incentrata sull’analisi delle più recenti pronunce giurisprudenziali in materia di project financing. In particolare, si ha avuto modo di analizzare il fenomeno dello jus poenitendi dell’amministrazione aggiudicatrice, nonché, più in generale gli eventi che possono negativamente incidere sulla finanza di progetto (mancata aggiudicazione, risoluzione del contratto di gestione, ecc.).
description: The thesis has as its object the analysis of the sophisticated legal solutions proposed by the national law in relation to the project financing evolution.
A particularly detailed study was carried out on the project financing phases as well as on the subjects that for different reasons and in different  ways do take part to it.
The exam also contains recent concrete project financing examples in the basic infrastructure (highways) including the construction project and the subsequent management of the regional highways such as Medio Padana Veneta, Cispadana, and "Nogara-Mare".
The last part o the thesis was finally focused on the analysis of the most recent laws cases in the field of  project financing.
The phenomenon of the contracting authority’s jus poenitendi was analysed in particular, as well as the powers of control over the lenders, and  more generally the events that may negatively affect the project financing  (failed adjudication, termination of the management contract, etc.).
Can we detect the quantum nature of weak gravitational fields?
Creators: name: Coradeschi, Francesco
name: Frassino, Antonia Micol
name: Guerreiro, Thiago
name: West, Jennifer Rittenhouse
name: Schioppa, Enrico Junior
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A theoretical framework for the quantization of gravity has been an elusive Holy Grail since the birth of quantum theory and general relativity. While generations of scientists have attempted solutions to this deep riddle, an alternative path built upon the idea that experimental evidence could determine whether gravity is quantized has been decades in the making. The possibility of an experimental answer to the question of the quantization of gravity is of renewed interest in the era of gravitational wave detectors. We review and investigate an important subset of phenomenological quantum gravity, detecting quantum signatures of weak gravitational fields in table-top experiments and interferometers.
description: Submitted to Universe, invited contribution to the topical issue "Probing Quantum Gravity."
Spherical systems in models of nonlocally corrected gravity
Creators: name: Bronnikov, K. A.
name: Elizalde, E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The properties of static, spherically symmetric configurations are considered in the framework of two models of nonlocally corrected gravity, suggested in S. Deser and R. Woodard., Phys. Rev. Lett. 663, 111301 (2007), and S. Capozziello et al., Phys. Lett. B 671, 193 (2009). For the first case, where the Lagrangian of nonlocal origin represents a scalar-tensor theory with two massless scalars, an explicit condition is found under which both scalars are canonical (non-phantom). If this condition does not hold, one of the fields exhibits a phantom behavior. Scalar-vacuum configurations then behave in a manner known for scalar-tensor theories. In the second case, the Lagrangian of nonlocal origin exhibits a scalar field interacting with the Gauss-Bonnet (GB) invariant and contains an arbitrary scalar field potential. It is found that the GB term, in general, leads to violation of the well-known no-go theorems valid for minimally coupled scalar fields in general relativity. It is shown, however, that some configurations of interest are still forbidden, whatever be the scalar field potential and the GB-scalar coupling function, namely, "force-free" wormholes (such that g_{tt}= const) and black holes with higher-order horizons.
description: 11 pages, no figures. References and comments added, a final form to appear in PRD
Tycherus cephalotes
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Tycherus
Tycherus cephalotes

description: Tycherus cephalotes (W ESMAEL, 1845)
M a t e r i a l e x a m i n e d: Trap 7: 1♀ 23.iv.-5.v.
D i s t r i b u t i o n: Transpalaearctic, known from Georgia (RIEDEL et al. 2018).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 96, DOI: 10.5281/zenodo.10415120
Danish (Q)SAR-database
Creators: Danmarks Tekniske Universitet
Miljøstyrelsen
Publisher: name: Rigsarkivet
Year: 2022

description: Databasen indeholder matematiske modeller - eller computer-forudsigelser (QSAR forudsigelser) - for forskellige egenskaber af kemiske stoffer, herunder toksiske effekter, som kan anvendes i vurderinger af kemiske stoffer/kemikalier. Formålet er at give miljømyndigheder, forskere og industri et redskab til at vurdere farligheden af stofferne på en enkelt og ikke alt for dyr måde. Mange af stofferne er ikke vurderet på andre måder. Databasen indeholder QSAR forudsigelser for 165.000 kemiske stoffer for mere end 70 egenskaber/effekter på dyr, mennesker og miljø tilgængelige. Data bruges bl.a. af Miljøstyrelsen, forskere i hele verden og af kemiske industrivirksomheder.
Deuterium-deuterium nuclear cross-sections in insulator and metallic environments
Creators: name: Salzmann, David
name: Hass, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The three-dimensional Thomas-Fermi (TF) model is used to simulate the variation of the d+d to t + p cross-section at low impact energies, when the target deuterium nucleus is embedded in metallic or insulator environments. Comparison of the computational results to recent experiments demonstrates that even though the TF model can explain some increase in the low energy cross section for metallic host, a full explanation of the experimental results is still lacking. Possible reasons for the disagreement are discussed.
description: 6 pages;6 figures. Accepted for publication in Eur. Phys. Jour. A
Tycherus coriaceus
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Tycherus
Tycherus coriaceus

description: Tycherus coriaceus (PERKINS, 1953)
M a t e r i a l e x a m i n e d: Trap12:1♁13-27.vii.
D i s t r i b u t i o n: Western Palaearctic, new record for Georgia and the Caucasus region.
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 96, DOI: 10.5281/zenodo.10415120
Await() a Second: Evading Control Flow Integrity by Hijacking C++ Coroutines
Creators: name: Sanchez Bajo, Marcos
name: Rossow, Christian
Publisher: name: CISPA
Year: 2025

description: Code reuse attacks exploit legitimate code sequences in a binary to execute malicious actions without introducing new code. Control Flow Integrity (CFI) defenses mitigate these attacks by restricting program execution to valid code paths.
However, new programming paradigms, like C++20 coroutines, expose gaps in current CFI protections. We demonstrate that, despite rigorous standardization, C++ coroutines present new vulnerabilities that undermine both coarse-grained and fine-grained CFI defenses. Coroutines, widely used in asynchronous programming, store critical execution data in writable heap memory, making them susceptible to exploitation. This paper introduces Coroutine Frame-Oriented Programming (CFOP), a novel code reuse attack that leverages these vulnerabilities across major compilers. We demonstrate how CFOP allows attackers to hijack program execution and manipulate data in CFI-protected environments. Through a series of Proof of Concept (PoC) exploits, we show the practical impact of CFOP. We also propose defensive measures to enhance coroutine security and address this emerging threat.
The Casimir effect in the nanoworld
Creators: name: Genet, Cyriaque
name: Lambrecht, Astrid
name: Reynaud, Serge
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Casimir effect is a force arising in the macroscopic world as a result of radiation pressure of vacuum fluctuations. It thus plays a key role in the emerging domain of nano-electro-mechanical systems (NEMS). This role is reviewed in the present paper, with discussions of the influence of the material properties of the mirrors, as well as the geometry dependence of the Casimir effect between corrugated mirrors. In particular, the lateral component of the Casimir force and restoring torque between metal plates with misaligned corrugations are evaluated.
description: 8 pages, 6 figures, contribution to CEWQO 2007 proceedings
The planar triangular $S=3/2$ magnet AgCrSe$_2$: magnetic frustration, short range correlations, and field tuned anisotropic cycloidal magnetic order
Creators: name: Baenitz, M.
name: Piva, M. M.
name: Luther, S.
name: Sichelschmidt, J.
name: Ranjith, K. M.
name: Dawczak-Dȩbicki, H.
name: Ajeesh, M. O.
name: Kim, S. -J.
name: Siemann, G.
name: Bigi, C.
name: Manuel, P.
name: Khalyavin, D.
name: Sokolov, D. A.
name: Mokhtari, P.
name: Zhang, H.
name: Yasuoka, H.
name: King, P. D. C.
name: Vinai, G.
name: Polewczyk, V.
name: Torelli, P.
name: Wosnitza, J.
name: Burkhardt, U.
name: Schmidt, B.
name: Rosner, H.
name: Wirth, S.
name: Kühne, H.
name: Nicklas, M.
name: Schmidt, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Our studies evidence an anisotropic magnetic order below $T_N = 32$~K. Susceptibility data in small fields of about 1~T reveal an antiferromagnetic (AFM) order for $H \perp c$, whereas for $H \parallel c$ the data are reminiscent of a field-induced ferromagnetic (FM) structure. At low temperatures and for $H \perp c$, the field-dependent magnetization and AC susceptibility data evidence a metamagnetic transition at $H^+ = 5$~T, which is absent for $H \parallel c$. We assign this to a transition from a planar cycloidal spin structure at low fields to a planar fan-like arrangement above $H^+$. A fully FM polarized state is obtained above the saturation field of $H_{\perp S} = 23.7$~T at 2~K with a magnetization of $M_s = 2.8$~$μ_{\rm B}{\rm /Cr}$. For $H \parallel c$, $M(H)$ monotonously increases and saturates at the same $M_s$ value at $H_{\parallel S} = 25.1$~T at 4.2~K. Above $T_N $, the magnetic susceptibility and specific heat indicate signatures of two dimensional (2D) frustration related to the presence of planar ferromagnetic and antiferromagnetic exchange interactions. We found a pronounced nearly isotropic maximum in both properties at about $T^* = 45$~K, which is a clear fingerprint of short-range correlations and emergent spin fluctuations. Calculations based on a planar 2D Heisenberg model support our experimental findings and suggest a predominant FM exchange among nearest and AFM exchange among third-nearest neighbors. Only a minor contribution might be assigned to the antisymmetric Dzyaloshinskii-Moriya interaction possible related to the non-centrosymmetric polar space group $R3m$. Due to these competing interactions, the magnetism in AgCrSe$_{2}$, in contrast to the oxygen based delafossites, can be tuned by relatively small, experimentally accessible, magnetic fields, allowing us to establish the complete anisotropic magnetic $H-T$ phase diagram in detail.
Symmetry Breaking of Relativistic Multiconfiguration Methods in the Nonrelativistic Limit
Creators: name: Esteban, Maria J.
name: Lewin, Mathieu
name: Savin, Andreas
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The multiconfiguration Dirac-Fock method allows to calculate the state of relativistic electrons in atoms or molecules. This method has been known for a long time to provide certain wrong predictions in the nonrelativistic limit. We study in full mathematical details the nonlinear model obtained in the nonrelativistic limit for Be-like atoms. We show that the method with sp+pd configurations in the J=1 sector leads to a symmetry breaking phenomenon in the sense that the ground state is never an eigenvector of L^2 or S^2. We thereby complement and clarify some previous studies.
description: Final version, to appear in Nonlinearity. Nonlinearity (2010) in press
A logical approach for temporal and multiplex networks analysis
Creators: name: Bautista, Esteban
name: Latapy, Matthieu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Social and Information Networks (cs.SI)
subject: Data Structures and Algorithms (cs.DS)
subject: Logic in Computer Science (cs.LO)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Many systems generate data as a set of triplets (a, b, c): they may represent that user a called b at time c or that customer a purchased product b in store c. These datasets are traditionally studied as networks with an extra dimension (time or layer), for which the fields of temporal and multiplex networks have extended graph theory to account for the new dimension. However, such frameworks detach one variable from the others and allow to extend one same concept in many ways, making it hard to capture patterns across all dimensions and to identify the best definitions for a given dataset. This extended abstract overrides this vision and proposes a direct processing of the set of triplets. In particular, our work shows that a more general analysis is possible by partitioning the data and building categorical propositions that encode informative patterns. We show that several concepts from graph theory can be framed under this formalism and leverage such insights to extend the concepts to data triplets. Lastly, we propose an algorithm to list propositions satisfying specific constraints and apply it to a real world dataset.
description: Extended abstract accepted at The 10th International Conference on Complex Networks and their Applications, 3 Pages
Rapid Quenching at High Redshift
Creators: name: Belli, Sirio
Publisher: name: Zenodo
Year: 2021

description: The first massive galaxies, which are observed to be already quiescent at z~3-4, must have undergone a very rapid quenching of their star formation.
 Modeling the number density evolution of rapidly quenching galaxies, we found that this channel accounts for about half of the total quenching rate at z~2, and substantially declines in importance at lower redshift, suggesting the existence of two distinct physical processes for fast and slow quenching. However, given the short timescales involved, rapidly quenching galaxies are very rare, and current studies are severely limited by the lack of wide space-based imaging surveys.
 With the Roman Space Telescope we will finally be able to accurately model the number density evolution of rapidly quenching systems and other rare galaxy populations. These results will provide new, critical constraints for models of galaxy quenching.
A broad-band spectral analysis of eight radio loud type 1 AGN selected in the hard X-ray band
Creators: name: Molina, M.
name: Bassani, L.
name: Malizia, A.
name: Bird, A. J.
name: Dean, A. J.
name: Fiocchi, M.
name: Panessa, F.
name: De Rosa, A.
name: Landi, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Starting from a complete sample of type I AGN observed by INTEGRAL in the 20-40 keV band, we have selected a set of 8 AGN which can be classified as radio loud objects according to their 1.4 GHz power density, radio to hard X-ray flux flux density ratio and radio morphology. The sample contains 6 Broad Line Radio Galaxies and 2 candidate ones. Most of the objects in our sample display a double lobe morphology, both on small and large scales. For all the objects, we present broad-band (1-110 keV) spectral analysis using INTEGRAL observations together with archival XMM-Newton, Chandra, Swift/XRT and Swift/BAT data. We constrain the primary continuum (photon index and cut-off energy), intrinsic absorption and reprocessing features (iron line and reflection) in most of the objects. The sources analysed here show remarkable similarities to radio quiet type 1 AGN with respect to most of the parameters analysed; we only find marginal evidence for weaker reprocessing features in our objects compared to their radio quiet counterparts. Similarly we do not find any correlation between the spectral parameters studied and the source core dominance or radio to 20-100 keV flux density ratios, suggesting that what makes our objects radio loud has no effect on their high energy characteristics.
description: 12 pages, 11 figures, accepted for publication on MNRAS
Renormalization of the leading-order chiral nucleon-nucleon interaction and bulk properties of nuclear matter
Creators: name: Machleidt, R.
name: Liu, P.
name: Entem, D. R.
name: Arriola, E. Ruiz
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We renormalize the two-nucleon interaction at leading order (LO) in chiral perturbation theory using the scheme proposed by Nogga, Timmermans, and van Kolck--also known as modified Weinberg counting. With this interaction, we calculate the energy per nucleon of symmetric nuclear matter in the Brueckner pair approximation and obtain a converged, cutoff-independent result that shows saturation, but also substantial underbinding. We find that the renormalized LO interaction is characterized by an extraordinarily strong tensor force (from one-pion exchange), which is the major cause for the lack of binding. The huge tensor force also leads to the unusually large wound integral of 40% in nuclear matter, which implies a very slow convergence of the hole-line or coupled-cluster expansion, rendering this interaction impractical for many-body calculations. In view of the unusual properties of the renormalized LO interaction and in view of the poor convergence of the nuclear many-body problem with this interaction, there is doubt if this interaction and its predictions can serve as a reasonable and efficient starting point that is improved by perturbative corrections.
description: 13 pages, 3 figures; references added, discussion slightly extended; final version to be published in PRC
New Two Dimensional Massless Field Theory from Bagger-Lambert-Gustavsson Model
Creators: name: Santos, M. A.
name: Vancea, I. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: By compactifying the Bagger-Lambert-Gustavsson model on $\mathbb{R}^{1,1} \times S^1$, we obtain a new two dimensional massless field theory with dynamical fields valued in the Lie 3-algebra $\mathcal{A}$ coupled with an SO(1,1) scalar and vector field which are valued in the set $End(\mathcal{A})$ of the endomorphisms of the Lie 3-algebra. In the limit $g_{BLG} \to \infty$ the theory reduces to a supersymmetric Lie 3-valued generalization of the Green-Schwarz superstring in the light-cone gauge.
description: Major modifications. The interpretations of the dynamical fields corrected. The discussion of the weak/strong coupling limits in considerably extended in Section 4. Several formulas simplified. References added. 11 pages
Common Coherence Witnesses and Common Coherent States
Creators: name: Wang, Bang-Hai
name: Ding, Zi-Heng
name: Ma, Zhihao
name: Fei, Shao-Ming
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show the properties and characterization of coherence witnesses. We show methods for constructing coherence witnesses for an arbitrary coherent state. We investigate the problem of finding common coherence witnesses for certain class of states. We show that finitely many different witnesses $W_1, W_2, \cdots, W_n$ can detect some common coherent states if and only if $\sum_{i=1}^nt_iW_i$ is still a witnesses for any nonnegative numbers $t_i(i=1,2,\cdots,n)$. We show coherent states play the role of high-level witnesses. Thus, the common state problem is changed into the question of when different high-level witnesses (coherent states) can detect the same coherence witnesses. Moreover, we show a coherent state and its robust state have no common coherence witness and give a general way to construct optimal coherence witnesses for any comparable states.
description: 4 pages, 1 figure
Cardy-Verlinde formula of Kehagias-Sfetsos black hole
Creators: name: Setare, M. R.
name: Jamil, Mubasher
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Physics (physics.gen-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we have shown that the entropy of the Kehagias-Sfetsos black hole in Ho$\check{\textbf{r}}$ava-Lifshitz (HL) gravity can be expressed by the Cardy-Verlinde formula. The later is supposed to be an entropy formula of conformal field theory in any dimension.
description: 10 pages, accepted by IJTP
Supplementary document for Exploring angular-steering illumination-based eyebox expansion for holographic displays - 6496901.pdf
Creators: name: Xia, Xinxing
name: wang, weisen
name: Guan, Frank
name: yang, furong
name: Shui, xinghua
name: Zheng, Huadong
name: yingjie, yu
name: Peng, Yifan
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Uncategorized

description: Experimental details and analysis
Tycherus flavofacies RIEDEL, DILLER & JAPOSHVILI 2018
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Tycherus
Tycherus flavofacies

description: Tycherus flavofacies RIEDEL, DILLER & JAPOSHVILI, 2018
M a t e r i a l e x a m i n e d: Trap 7: 1♀ 23.iv.-5.v., 1♀ 20.v.-1.vi., 1♀ 13-27.vii., 1♀ 27.vii.- 10.viii.; trap 12: 2♀♀ 20.iv.-5.v., 1♀ 2-16.vi., 1♀ 27.vii.-10.viii., 1♀ 24.viii.-7.ix.
D i s t r i b u t i o n: Only known from Georgia (RIEDEL et al. 2018).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 96, DOI: 10.5281/zenodo.10415120
title: Ethnic Differences in Educational Attainment and Labour Market Outcomes
title: Evidence from Germany
titleType: Subtitle
Creators: name: Bakr, Yasmine
Publisher: name: Freie Universität Berlin
Year: 2024
Subjects: subject: Labour market
subject: Educational attainment
subject: Inequality of outcomes
subject: Decomposition methods
subject: Discrimination
subject: Migrant generations
classificationCode: 330
subject: Wirtschaft

description: This thesis investigates the educational and employment outcomes of various ethnic groups and migrant generations in Germany, focusing on how socioeconomic status (SES), family background, and generational status influence integration trajectories. Drawing from classical, new, and segmented assimilation theories, the study examines whether generational mobility aligns with expectations of socioeconomic integration. Using probit regression models, the analysis reveals significant heterogeneity across groups. First-generation immigrants with a higher immigration age show increased likelihood of low educational outcomes, while younger arrivals achieve higher education levels. Gender disparities persist, with women more likely to attain lower educational levels, though SES and family background partly attenuate these gaps. Al- though SES explains many disparities, residual gaps remain, especially for Turkish and Middle Eastern groups who were born in Germany, suggesting possible differential treatment or structural obstacles, such as language barri- ers and limited network access. While intergenerational improvements are evident, persistent gaps highlight the need for targeted policies, including early- childhood education, language assistance, and SES-focused support, to foster equitable integration pathways.
The impact of model risk on dynamic portfolio selection under multi-period mean-standard-deviation criterion
Creators: name: Penev, Spiridon
name: Shevchenko, Pavel V.
name: Wu, Wei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Portfolio Management (q-fin.PM)
subject: FOS: Economics and business

description: We quantify model risk of a financial portfolio whereby a multi-period mean-standard-deviation criterion is used as a selection criterion. In this work, model risk is defined as the loss due to uncertainty of the underlying distribution of the returns of the assets in the portfolio. The uncertainty is measured by the Kullback-Leibler divergence, i.e., the relative entropy. In the worst case scenario, the optimal robust strategy can be obtained in a semi-analytical form as a solution of a system of nonlinear equations. Several numerical results are presented which allow us to compare the performance of this robust strategy with the optimal non-robust strategy. For illustration, we also quantify the model risk associated with an empirical dataset.
title: Global Cultural Assembly
title: Decolonial (Im)Possibilities at the Humboldt Forum (2022-2024)
titleType: Subtitle
Creators: name: Dias Portugal Guimarães, Anna Sara
Publisher: name: Freie Universität Berlin
Year: 2024
Subjects: subject: museum
subject: collaboration
subject: coloniality
subject: ethnography
classificationCode: 301
subject: Sociology and anthropology
classificationCode: 306
subject: Culture and institutions

description: This paper presents an interdisciplinary critical ethnography situated in anthropology and museum studies concerning the relationship between coloniality and museums. The investigation examines the participation of the Global Cultural Assembly in the intended process of decolonization of the Ethnological Museum in Berlin and the Humboldt Forum. The findings suggest that decolonial practices in traditional museums cannot be understood within binary dichotomies. Furthermore, the study argues that the attempt to decolonize museums is often found in the poetics and encounters of different grammars that, when placed at a crossroads, face challenges such as the reproduction of coloniality.