cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Common Envelope Evolution on the Asymptotic Giant Branch: Unbinding within a Decade?
Creators: name: Chamandy, Luke
name: Blackman, Eric G.
name: Frank, Adam
name: Carroll-Nellenback, Jonathan
name: Tu, Yisheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Common envelope (CE) evolution is a critical but still poorly understood progenitor phase of many high-energy astrophysical phenomena. Although 3D global hydrodynamic CE simulations have become more common in recent years, those involving an asymptotic giant branch (AGB) primary are scarce, due to the high computational cost from the larger dynamical range compared to red giant branch (RGB) primaries. But CE evolution with AGB progenitors is desirable to simulate because such events are the likely progenitors of most bi-polar planetary nebulae (PNe), and prominent observational testing grounds for CE physics. Here we present a high resolution global simulation of CE evolution involving an AGB primary and $1\,\mathrm{M}_\odot$ secondary, evolved for $20$ orbital revolutions. During the last $16$ of these orbits, the envelope unbinds at an almost constant rate of about $0.1$-$0.2\,\mathrm{M}_\odot\,\mathrm{yr}^{-1}$. If this rate were maintained, the envelope would be unbound in less than $10\,\mathrm{yr}$. The dominant source of this unbinding is consistent with inspiral; we assess the influence of the ambient medium to be subdominant. We compare this run with a previous run that used an RGB phase primary evolved from the same $2\,\mathrm{M}_\odot$ main sequence star to assess the influence of the evolutionary state of the primary. When scaled appropriately, the two runs are quite similar, but with some important differences.
description: 12 pages, 12 figures, published in MNRAS
A New Tunable Dual-mode Bandpass Filter Design Based on Fractally Slotted Microstrip Patch Resonator
Creators: name: Ali, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90699 Electrical and Electronic Engineering not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: A dual-mode slotted microstrip patch resonator is introduced in this paper for use in wireless communication applications. The slot structure, etched inside the patch resonator, is in the form of the 2nd iteration Koch fractal curve; using the conventional square microstrip patch resonator as the initiator. Modeling and performance evaluation of the proposed filter design have been carried out using a method of moment based EM simulator, IE3D. Simulation results show that the resulting resonator filter has good transmission and return loss responses. The modeled resonator has been found to possess a side length of about 0.22 the guided wavelength, which represents a size reduction of about 81% as compared with that based on the conventional square microstrip patch without slot. In addition, slits have been symmetrically etched in the external edges of the patch structure, in an attempt to provide the resonator with tuning facility. Besides the tuning possibility, these slits have been found to o®er further size reduction without worsening the resulting filter performance; providing the designer with more degrees of freedom.
Changes in the quality of chilled and frozen-thawed chicken sperm when heated near the temperature of the female reproductive tract
Creators: name: Bernal Juárez, Berenice
name: Vegi, Barbara
name: Váradi, Eva
name: Drobnyák, Árpád
name: Liptoi, Krisztina
name: Santiago-Moreno, Julián
name: Hawken, Rachel
name: de Kovel, Carolien
name: Hiemstra, Sipke Joost
name: Woelders, Henri
Publisher: name: Zenodo
Year: 2024
Subjects: rooster sperm
artificial insemination
chilled sperm
chicken sperm
hen
warmed sperm

description: Fertilisation capacity of cryopreserved chicken sperm varies widely in the literature and many questions are unresolved about sperm changes in the female reproductive tract. Considering that hen’s temperature is around 41 °C, the present study investigated the effect of warming chilled and frozenthawed sperm from 5 °C to 37 °C or to room temperature. Experiment 1, pooled semen (5 roosters/pool; n=4), extended with ASG diluent with 0.6 M DMA was aliquoted (0.22 mL) in glass tubes and placed at 5°C for 1h. One tube/pool was fixed with formaldehyde while another was immersed in 37 °C water (1 min) and fixed. Experiment 2, pooled semen (5 roosters/pool; n=9) was cryopreserved (0.6 M DMA) in 0.25 straws at 50 °C/min. Two straws per pool were thawed in 5 °C water and semen was collected in different glass tubes. One tube was fixed at 5 °C and, the other, after immersion in 37 °C water (1 min). Acrosome integrity (Acr%) was assessed with methyl blue staining. Experiment 3, 20 hens (n=10/group) were inseminated (≈100 million sperm); group 1: 4 times (twice weekely) with extended semen chilled at 5°C for 1h (CES) + 3 times (in one week) with room temperature extended semen (RTES); group 2: 7 times with neat semen (NS). Acr% of chilled semen was not affected by warming (exp. 1), but Acr% of frozen–thawed semen (exp. 2) decreased from 80.9 ±2.3% (5°C) to 11.1 ± 2.18% (37°C). Fertility in inseminations 1-4 was lower with CES (3.7%) than with NS (48.2%) but increased to 54% with RTES (inseminations 5-7) while NS reached 71.4%. In conclusion, sperm damage caused by chilling/freezingthawing may only be detected after subsequent rewarming. Mere chilling (and rewarming in the hen) caused a drastic decrease in fertility.Funding: European Union HORIZON-MSCA-2022-PF-01-01, Project 101109983 CRYOCHICK
X-rays induced atomic dynamics in a lithium-borate glass
Creators: name: Dallari, F.
name: Pintori, G.
name: Baldi, G.
name: Martinelli, A.
name: Ruta, B.
name: Sprung, M.
name: Monaco, G.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The continuous development of synchrotron-based experimental techniques in the X-ray range provides new possibilities to probe the structure and the dynamics of bulk materials down to inter-atomic distances. However, the interaction of intense X-ray beams with matter can also induce changes in the structure and dynamics of materials. A reversible and non-destructive beam induced dynamics has recently been observed in X-ray photon correlation spectroscopy experiments in some oxide glasses at sufficiently low absorbed doses, and is here investigated in a (Li$_2$O)$_{0.5}$(B$_2$O$_3$)$_{0.5}$ glass. The characteristic time of this induced dynamics is inversely proportional to the intensity of the X-ray beam, with a coefficient that depends on the chemical composition and local structure of the probed glass, making it a potentially new tool to investigate fundamental properties of a large class of disordered systems. While the exact mechanisms behind this phenomenon are yet to be elucidated, we report here on the measurement of the exchanged wave-vector (and thus length-scale) dependence of the characteristic time of this induced dynamics, and show that it follows the same power-law observed in vitreous silica. This supports the idea that a unique explanation for this effect in different oxide glasses should be looked for.
description: 9 pages, 4 figures
Chicken or egg? A hierarchy of homotopy algebras
Creators: name: Akman, Fusun
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: We start by clarifying and extending the multibraces notation, which economically describes substitutions of multilinear maps and tensor products of vectors. We give definitions and examples of homotopy algebras, strongly homotopy Gerstenhaber and Gerstenhaber bracket algebras, and strongly homotopy Batalin-Vilkovisky algebras. We show that a homotopy algebra structure on a vector space can be lifted to its Hochschild complex, and also suggest an induction method to generate explicit strongly homotopy Gerstenhaber algebra maps on a topological vertex operator algebra (TVOA), their existence having been proven by Kimura, Voronov, and Zuckerman in 1996 (later amended by Voronov). The contention that this is the fundamental structure on a TVOA is substantiated by providing an annotated dictionary of strongly homotopy BV algebra maps and identities found by Lian and Zuckerman in 1993.
description: 33 pages, LaTeX. Made significant changes and added references
Critical Field of Al-Doped MgB2 Samples: Correlation with the Suppression of Sigma-Band Gap
Creators: name: Putti, M.
name: Ferdeghini, C.
name: Monni, M.
name: Pallecchi, I.
name: Tarantini, C.
name: Manfrinetti, P.
name: Palenzona, A.
name: Daghero, D.
name: Gonnelli, R. S.
name: Stepanov, V. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In this Letter, the study of the effect of Al substitution on the upper critical field, Bc2, in AlxMg1-xB2 samples is presented. We find a straightforward correlation between Bc2 and the sigma-band gap, Delta_sigma, evaluated by point-contact measurements. Up to x=0.2 Bc2 can be well described within a clean limit model and its decrease with x is directly related to the suppression of Delta_sigma. For larger doping we observed the crossover to the dirty regime driven mostly by the strong decrease of Delta_sigma rather than by the increase of the sigma-band scattering rate
description: 5 pages, 4 figures
Strategic Decisions for the Development of Tourism During the Transition Period in Serbia
Creators: name: Vukovic, Predrag
name: Kljajic, Natasa
name: Roljevic, Svetlana
name: Vukovic, Predrag
name: Kljajic, Natasa
name: Roljevic, Svetlana
Publisher: name: Unknown
Year: 2009
Subjects: subject: Public Economics
subject: tourism
subject: transition
subject: politics
subject: economy
subject: marketing

description: Tourism represents a very perspective and significant economic activity for the Republic of Serbia, being one of the basic branches of economy, creator of GDP and supporter of the development of different environments. Unfortunately, since the beginning of the 1990s of the twentieth-century conditions for the development of activities in the field of tourism have been very negative, because of many reasons. Reasons that certainly belong among others are: the shortage of capital, reduced turnover scope in tourism, very small investment, but the basic reason is the deep economic crises that have taken hold of our society. Under the influence of the arisen changes, present level in the development of the domestic tourism is under the actual possibilities that are enabled by natural, as well as social respectable resources. The politics of undifferentiated marketing was immanent during the whole period of the post-war development in tourism after the W.W.II up until today and has not been giving results that were real according to the available resources. During the period of transition it is often heard of tourism being one of the bases for the future economic development of the Republic of Serbia. However, it hasn’t been done much to actually take steps in practice. The aim of this work is to point out the state of tourism in the current economic situation in the country with the special stress on the possible strategic moves in the further development in tourism.
A New Miniaturized E-shaped Printed Monopole Antenna for UWB Applications
Creators: name: Ali, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90699 Electrical and Electronic Engineering not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, a compact UWB printed monopole antenna design is proposed. The monopole antenna has the form of an E-shaped structure printed on a substrate with relative dielectric constant of 3.38, and thickness of 1.52 mm. The matching through the UWB response is satisfied using a reduced ground plane. The proposed antenna is fed by a 50­ unsymmetrical microstrip line. The ground plane is printed beneath the microstrip line. Modeling and performance evaluation of the proposed antenna have been carried out using the commercially available electromagnetic simulator, IE3D from Zeland Software Inc. A parametric study is performed to show the effects of the different antenna parameters on the overall antenna performance. The performance of the antenna is mainly affected by geometrical and electrical parameters, such as the width and length of the branches of the E-shape structure, feed gap as well as the ground plane. Simulation results show that the proposed antenna possesses an operating bandwidth, for return loss · -10 dB, extending from approximately 2.93 GHz to about 14 GHz which covers the entire UWB band of 3.1 GHz to 10.6 GHz.
Pachyprotasis longicornis Jakowlew 1891
Creators: name: Zhong, Yihai
name: Wei, Meicai
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Tenthredinidae
Pachyprotasis
Pachyprotasis longicornis

description: Pachyprotasis longicornis Jakowlew, 1891
(Figs 9, 10, 44, 61, 98, 102, 108)
Pachyprotasis longicornis Jakowlew, 1891: 42 –43. [male], type locality: “Hej-ho” Gansu, China. Pachyprotasis longicornis: Malaise 1931: 131 –132; Malaise 1945: 146; Saini 2007: 77 –78, figs. 161, 164, 168, 176, 194, 204. Pachyprotasis longicornis var. kurilarum Malaise, 1931: 134, type locality: Urup, Kurilen. = Dipteromorpha longicornis: Konow 1905: 125.
= Macrophya nigrolineata Matsumura, 1912: 48; type locality: Sapporo, Hokkaido, Japan.
Material examined. 1 3, Gansu Province, China, 26.06.1885, collected by Potanin, identified by Jakowlew, (Coll. DEI).
Distribution. China (Gansu) (Fig. 108); Japan, Russia.
Body length 8–8.5 mm. Ground color of mesonotum black and likewise at least basal 3/4 of all abdominal terga above; pale are: mesoscutellum, metascutellum, a spot before mesoscutellum, broad margin of the median mesoscutal lobe, entire under side of thorax and abdomen (in male anterior part of mesepimeron with a narrow black stripe); all abdominal terga with broad and complete pale hind margins; under side of antenna pale in both sexes; ovipositor sheath quite black. Legs pale without black markings basally from the middle of femora; all femora each with an elongate spot near the apex on the inner side; tibiae and tarsi of the four front legs each with a black stripe along their entire length; most of the hind tibia pale, apex black; in the female, tibiae striped along their entire length with black behind; base of the posterior metatarsi and other tarsal joints mostly pale, rest of metatarsi quite black with very narrow pale stripe; the apical half of all tarsal claw joints black, base more or less pale; Median fovea rather narrow; frontal area distinct, rounded and with very fine but rather sharp ridges; postocellar area 2 times as broad as long, strongly convex, with very deep and broad lateral furrow. Frontal and postocellar area distinctly shiny, but with scattered shallow punctures and sculpture; punctures on mesopleuron hardly distinguishable; in the female, flagellomere 1 somewhat longer than flagellomere 2.
Male. (Figs 9, 10, 44, 61). gonoforceps and penis valve as in Figs 98, 102.
description: Published as part of Zhong, Yihai & Wei, Meicai, 2012, A review of the Pachyprotasis pallidistigma species group (Hymenoptera: Tenthredinidae) from China, with descriptions of three new species, pp. 1-38 in Zootaxa 3242 on pages 6-7, DOI: 10.5281/zenodo.280476
Intranight optical variability of low-mass Active Galactic Nuclei: A Pointer to blazar-like activity
Creators: name: Gopal-Krishna
name: Chand, Krishan
name: Chand, Hum
name: Negi, Vibhore
name: Mishra, Sapna
name: Britzen, S.
name: Bisht, P. S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This study aims to characterise, for the first time, intranight optical variability (INOV) of low-mass active galactic nuclei (LMAGN) which host a black hole (BH) of mass $M_{BH} \sim 10^6 M_{\odot}$, i.e., even less massive than the Galactic centre black hole Sgr A* and 2-3 orders of magnitude below the supermassive black holes (SMBH, $M_{BH}$ $\sim$ $10^8 - 10^9 M_{\odot}$) which are believed to power quasars. Thus, LMAGN are a crucial subclass of AGN filling the wide gap between SMBH and stellar-mass BHs of Galactic X-ray binaries. We have carried out a 36-session campaign of intranight optical monitoring of a well-defined, representative sample of 12 LMAGNs already detected in X-ray and radio bands. This set of LMAGN is found to exhibit INOV at a level statistically comparable to that observed for blazars (M$_{BH} \gtrsim$ 10$^{8-9}$ M$_{\odot}$) and for the $γ$-ray detected Narrow-line Seyfert1 galaxies (M$_{BH}\sim 10^7$ M$_{\odot}$) which, too, are believed to have relativistic jets. This indicates that the blazar-level activity can even be sustained by central engines with black holes near the upper limit for Intermediate Mass Black Holes ($M_{BH}$ $\sim$ $10^3 - 10^6 M_{\odot}$).
description: Accepted for publication in MNRAS Letters
A Fractal-based Printed Slot Antenna for Multi-band Wireless Applications
Creators: name: Ali, Jawad K.
Publisher: name: figshare
Year: 2020
Subjects: subject: 90699 Electrical and Electronic Engineering not elsewhere classified
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Fractal geometries have shown to be attractive for antenna designers because of the unique features they offer. In this paper, a printed fractal based slot antenna has been introduced to be used in multi-band wireless applications. The slot structure of the proposed antenna is of an octagonal shape with a Koch fractal curve of the second iteration is applied on each of its sides. The slot structure has been etched on the ground plane of a substrate with relative permittivity of 4.4 and 1.6mm thickness. On the reverse side of the substrate, a 50 ohm microstrip line feed has been etched. To enhance the coupling with the slot, the feed line has been loaded with a circular stub with embedded complementary circular split ring resonator. Based on the lowest resonant frequency, it has been found that the largest dimension of the proposed antenna slot structure is less than half the guided wavelength. Parametric study shows that the resulting antenna offers a multi-band behavior with enhanced gain and fractional bandwidths, besides the reasonable radiation characteristics throughout the resonating bands. With appropriate dimension scaling, the proposed antenna could be a suitable candidate for use in a wide variety of multi functions wireless applications.
Simulations of gas sloshing induced by a newly discovered gas poor substructure in galaxy cluster Abell 1644
Creators: name: Doubrawa, L.
name: Machado, R. E. G.
name: Laganá, T. F.
name: Neto, G. B. Lima
name: Monteiro-Oliveira, R.
name: Cypriano, E. S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Collision events lead to peculiar morphologies in the intracluster gas of galaxies clusters. That seems to be the case of Abell 1644, a nearby galaxy cluster, composed of three main structures: the southern cluster that exhibits a spiral-like morphology, A1644S; the northern cluster seen in X-ray observations, A1644N1; and the recently discovered substructure, A1644N2. By means of $N$-body hydrodynamical simulations, we attempt to reconstruct the dynamical history of this system. These simulations resulted in two specific scenarios: (i) The collision between A1644S and A1644N2. Our best model has an inclination between the merger plane and the plane of the sky of $30^\circ$, and reaches the best morphology $1.6\,$Gyr after the pericentric passage. At this instant A1644N2 is gas poor, becoming nearly undetectable in X-ray emission. This model shows a good agreement with observations; (ii) The collision between A1644S and A1644N1. This approach did not give rise to results as satisfactory as the first scenario, due to great disturbances in density and mismatching temperature maps. As a complementary study, we perform a three-cluster simulation using as base the best-fitting model to reproduce the current state of A1644 with the three main structures. This scenario presented a good agreement to the global morphology of the observations. Thus, we find that the more likely scenario is a collision between A1644S and the newly discovered A1644N2, where A1644N1 may be present as long as it does not greatly interfere in the formation of the spiral feature.
description: 13 pages, 11 figures, 2 tables. Accepted for publication in MNRAS in 2020 April 16
ZMCintegral-v5: Support for Integrations with the Scanning of Large Parameter Grids on Multi-GPUs
Creators: name: Zhang, Jun-Jie
name: Wu, Hong-Zhong
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In this updated vesion of ZMCintegral, we have added the functionality of integrations with parameter scan on distributed Graphics Processing Units(GPUs). Given a large parameter grid (up to 10^{10} parameter points to be scanned), the code will evaluate integrations for each parameter grid value. To ensure the evaluation speed, this new functionality employs a direct Monte Carlo method for the integraion. The Python API is kept the same as the previous ones and users have a full flexibility to define their own integrands. The performance of this new functionality is tested for both one node and multi-nodes conditions.
description: 14 pages, 7 figures(including sub-figures)
Correlated motion of two atoms trapped in a single mode cavity field
Creators: name: Asbóth, J. K.
name: Domokos, P.
name: Ritsch, H.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the motion of two atoms trapped at distant positions in the field of a driven standing wave high-Q optical resonator. Even without any direct atom-atom interaction the atoms are coupled through their position dependent influence on the intracavity field. For sufficiently good trapping and low cavity losses the atomic motion becomes significantly correlated and the two particles oscillate in their wells preferentially with a 90 degrees relative phase shift. The onset of correlations seriously limits cavity cooling efficiency, raising the achievable temperature to the Doppler limit. The physical origin of the correlation can be traced back to a cavity mediated cross-friction, i.e. a friction force on one particle depending on the velocity of the second particle. Choosing appropriate operating conditions allows for engineering these long range correlations. In addition this cross-friction effect can provide a basis for sympathetic cooling of distant trapped clouds.
description: 10 pages, 9 figures, accepted for publication in Phys. Rev. A. Minor grammatical changes to previous version
Trajectory-Based Recognition of Dynamic Persian Sign Language Using Hidden Markov Model
Creators: name: Azar, Saeideh Ghanbari
name: Seyedarabi, Hadi
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Sign Language Recognition (SLR) is an important step in facilitating the communication among deaf people and the rest of society. Existing Persian sign language recognition systems are mainly restricted to static signs which are not very useful in everyday communications. In this study, a dynamic Persian sign language recognition system is presented. A collection of 1200 videos were captured from 12 individuals performing 20 dynamic signs with a simple white glove. The trajectory of the hands, along with hand shape information were extracted from each video using a simple region-growing technique. These time-varying trajectories were then modeled using Hidden Markov Model (HMM) with Gaussian probability density functions as observations. The performance of the system was evaluated in different experimental strategies. Signer-independent and signer-dependent experiments were performed on the proposed system and the average accuracy of 97.48% was obtained. The experimental results demonstrated that the performance of the system is independent of the subject and it can also perform excellently even with a limited number of training data.
A $δ$-first Whitehead Lemma for Jordan algebras
Creators: name: Zohrabi, Arezoo
name: Zusmanovich, Pasha
Publisher: name: arXiv
Year: 2024
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17C20, 17C55, 17D99

description: We compute $δ$-derivations of simple Jordan algebras with values in irreducible bimodules. They turn out to be either ordinary derivations ($δ= 1$), or scalar multiples of the identity map ($δ= \frac 12$). This can be considered as a generalization of the "First Whitehead Lemma" for Jordan algebras which claims that all such ordinary derivations are inner. The proof amounts to simple calculations in matrix algebras, or, in the case of Jordan algebras of a symmetric bilinear form, to more elaborated calculations in Clifford algebras.
description: 13 pages; v3: final version formatted for the publication
Primordial non-Guassianity in inflation with gravitationally enhanced friction
Creators: name: Chen, Li-Yang
name: Yu, Hongwei
name: Wu, Puxun
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The gravitationally enhanced friction can reduce the speed of the inflaton to realize an ultra-slow-roll inflation, which will amplify the curvature perturbations. The amplified perturbations can generate a sizable amount of primordial black holes (PBHs) and induce simultaneously a significant background gravitational waves (SIGWs). In this paper, we investigate the primordial non-Gaussianity of the curvature perturbations in the inflation with gravitationally enhanced friction. We find that when the gravitationally enhanced friction plays a role in the inflationary dynamics, the non-Gaussianity is noticeably larger than that from the standard slow-roll inflation. During the regime in which the power spectrum of the curvature perturbations is around its peak, the non-Gaussianity parameter changes from negative to positive. When the power spectrum is at its maximum, the non-Gaussianity parameter is near zero ($\sim \mathcal{O}(0.01)$). Furthermore, the primordial non-Gaussianity promotes the formation of PBHs, while its effect on SIGWs is negligible.
description: 19 pages, 2 figures, three references added
The Influence of Corridor VII and Corridor X on the Transitional Economy of Serbia
Creators: name: Dujic, Ivan
name: Dujic, Ivan
Publisher: name: Unknown
Year: 2009
Subjects: subject: International Relations/Trade
subject: world financial crisis
subject: world order
subject: international relations rings
subject: South America
subject: integration
subject: diplomacy
subject: national and international capital
subject: period of serbian economic transition

description: The beginning of the 21st Century is posing a challenge to Serbia’s transition economy to take a step towards connecting to the world through the Corridor VII and Corridor X. Such a step, irrespective of the high cost it entails and the prevailing global financial crisis, would bring to Serbia manifold benefits by involving its national capital. Serbia’s national capital, otherwise imprisoned within the state boundaries, should help Serbia in creating an ambient for brain circulation at a global level. Using the language of diplomacy, brain circulation at a global level implies Serbia’s tame behaviour towards great powers, a sense for global dynamism, full respect for an individual without military skills as well as the ever-present proselytism in decision-making. It presupposes that through the use of national capital Serbia should become a country where great-powers influence are bypassing. According to the author, the transition period will be successfully completed if the contemporary Serbian diplomacy turns to the Corridor VII and Corridor X like Latin American countries which adapted their public diplomacy to the needs of mutual integration into individual entities thanks to looking after the Amazon River in a joint manner. The subject of this paper is Serbia with a potential to become a respected country in the world due to brain circulation at a global level and bypassing the great powers’ influence through the Corridor VII and Corridor X.
Content and Theoretical Investigation/ Definition of Transition and Restructuring of Economy and Enterprises
Creators: name: Prokopovic, Zivojin B.
name: Prokopovic, Karolina S.
name: Prokopovic, Zivojin B.
name: Prokopovic, Karolina S.
Publisher: name: Unknown
Year: 2009
Subjects: subject: Institutional and Behavioral Economics
subject: transition
subject: mechanism of transition
subject: economy
subject: enterprise
subject: structuring
subject: industrial complexes

description: The Transition of the economic and overall environment and restructuring of the enterprises are recurrent processes. The transition of the environment means establishing the market economy which may exists only if the enterprise’s ownership is defined and if it is financially stable and well structured. The restructuring is needed because even the enterprises in difficult situation may be recovered in a way to a certain degree.
Vetting the optical transient candidates detected by the GWAC network using convolutional neural networks
Creators: name: Turpin, Damien
name: Ganet, M.
name: Antier, S.
name: Bertin, E.
name: Xin, L. P.
name: Leroy, N.
name: Wu, C.
name: Xu, Y.
name: Han, X. H.
name: Cai, H. B.
name: Li, H. L.
name: Lu, X. M.
name: Wei, J. Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The observation of the transient sky through a multitude of astrophysical messengers hasled to several scientific breakthroughs these last two decades thanks to the fast evolution ofthe observational techniques and strategies employed by the astronomers. Now, it requiresto be able to coordinate multi-wavelength and multi-messenger follow-up campaign withinstruments both in space and on ground jointly capable of scanning a large fraction of thesky with a high imaging cadency and duty cycle. In the optical domain, the key challengeof the wide field of view telescopes covering tens to hundreds of square degrees is to dealwith the detection, the identification and the classification of hundreds to thousands of opticaltransient (OT) candidates every night in a reasonable amount of time. In the last decade, newautomated tools based on machine learning approaches have been developed to perform thosetasks with a low computing time and a high classification efficiency. In this paper, we presentan efficient classification method using Convolutional Neural Networks (CNN) to discard anybogus falsely detected in astrophysical images in the optical domain. We designed this toolto improve the performances of the OT detection pipeline of the Ground Wide field AngleCameras (GWAC) telescopes, a network of robotic telescopes aiming at monitoring the opticaltransient sky down to R=16 with a 15 seconds imaging cadency. We applied our trainedCNN classifier on a sample of 1472 GWAC OT candidates detected by the real-time detectionpipeline. It yields a good classification performance with 94% of well classified event and afalse positive rate of 4%.
description: 12 pages, 8 figures, 5 tables
Alphus similis Martins 1985
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Alphus
Alphus similis

description: 2. Alphus similis Martins, 1985
Type locality — Brazil, São Paulo. (MZSP). Distribution — Brazil (Bahia to Rio Grande do Sul, Mato Grosso do Sul), Paraguay, Argentina (Formosa).
 Alphus similis Martins, 1985: 178; Restello et al., 2001: 296.
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
A Proactive Decoy Selection Scheme for Cyber Deception using MITRE ATT&CK
Creators: name: Zambianco, Marco
name: Facchinetti, Claudio
name: Siracusa, Domenico
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Cyber deception allows compensating the late response of defenders countermeasures to the ever evolving tactics, techniques, and procedures (TTPs) of attackers. This proactive defense strategy employs decoys resembling legitimate system components to lure stealthy attackers within the defender environment, slowing and/or denying the accomplishment of their goals. In this regard, the selection of decoys that can expose the techniques used by malicious users plays a central role to incentivize their engagement. However, this is a difficult task to achieve in practice, since it requires an accurate and realistic modeling of the attacker capabilities and his possible targets. In this work, we tackle this challenge and we design a decoy selection scheme that is supported by an adversarial modeling based on empirical observation of real-world attackers. We take advantage of a domain-specific threat modelling language using MITRE ATT&CK framework as source of attacker TTPs targeting enterprise systems. In detail, we extract the information about the execution preconditions of each technique as well as its possible effects on the environment to generate attack graphs modeling the adversary capabilities. Based on this, we formulate a graph partition problem that minimizes the number of decoys detecting a corresponding number of techniques employed in various attack paths directed to specific targets. We compare our optimization-based decoy selection approach against several benchmark schemes that ignore the preconditions between the various attack steps. Results reveal that the proposed scheme provides the highest interception rate of attack paths using the lowest amount of decoys.
Levitation of quantum Hall critical states in a lattice model with spatially correlated disorder
Creators: name: Koschny, Th.
name: Schweitzer, L.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The fate of the current carrying states of a quantum Hall system is considered in the situation when the disorder strength is increased and the transition from the quantum Hall liquid to the Hall insulator takes place. We investigate a two-dimensional lattice model with spatially correlated disorder potentials and calculate the density of states and the localization length either by using a recursive Green function method or by direct diagonalization in connection with the procedure of level statistics. From the knowledge of the energy and disorder dependence of the localization length and the density of states (DOS) of the corresponding Landau bands, the movement of the current carrying states in the disorder--energy and disorder--filling-factor plane can be traced by tuning the disorder strength. We show results for all sub-bands, particularly the traces of the Chern and anti-Chern states as well as the peak positions of the DOS. For small disorder strength $W$ we recover the well known weak levitation of the critical states, but we also reveal, for larger $W$, the strong levitation of these states across the Landau gaps without merging. We find the behavior to be similar for exponentially, Gaussian, and Lorentzian correlated disorder potentials. Our study resolves the discrepancies of previously published work in demonstrating the conflicting results to be only special cases of a general lattice model with spatially correlated disorder potentials. To test whether the mixing between consecutive Landau bands is the origin of the observed floating, we truncate the Hilbert space of our model Hamiltonian and calculate the behavior of the current carrying states under these restricted conditions.
description: 10 pages, incl. 13 figures, accepted for publication in PRB
Global Accretion Properties of Black Hole X-Ray Binaries: A Phenomenological Perspective
Creators: name: Jana, Arghajit
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Black hole X-ray binaries (BHXBs) show rich phenomenology in the spectral and timing properties. We collected the spectral data of 20 BHXBs from the literature across different spectral states. The spectral properties are studied in the forms of the inner disc temperature ($T_{\rm in}$), photon index ($Γ$), hot electron temperature ($kT_{\rm e}$), X-ray flux ($F_{\rm X}$) and luminosity ($L_{\rm X}$). We studied various correlations among different spectral parameters to understand the accretion process on a global scale. In the thermal soft states (TSS), we find most of the sources followed $F_{\rm disc} \propto T_{\rm in}^4$ relation. A `V'-shaped correlation is found between $Γ$ and total luminosity ($L_{\rm tot}$) in the hard Comptonized state (HCS). The Comptonized luminosity is observed to be correlated with the disc luminosity in the HCS and TSS. No notable correlation is observed in the intermediate state (IMS). The evolution of the inner disc radius ($R_{\rm in}$) is unclear in the HCS and IMS. We also discuss how the hot electron temperature changes with other spectral parameters. We observe that the iron line flux correlates with disc and Comptonized fluxes. The strength of the reprocessed emission is found to vary across spectral states.
description: 11 pages, 6 figures, accepted for publication in MNRAS
On a phase field model of Cahn-Hilliard type for tumour growth with mechanical effects
Creators: name: Garcke, Harald
name: Lam, Kei Fong
name: Signori, Andrea
Publisher: name: arXiv
Year: 2019
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: Mechanical effects have mostly been neglected so far in phase field tumour models that are based on a Cahn-Hilliard approach. In this paper we study a macroscopic mechanical model for tumour growth in which cell-cell adhesion effects are taken into account with the help of a Ginzburg--Landau type energy. In the overall model an equation of Cahn-Hilliard type is coupled to the system of linear elasticity and a reaction-diffusion equation for a nutrient concentration. The highly non-linear coupling between a fourth-order Cahn-Hilliard equation and the quasi-static elasticity system lead to new challenges which cannot be dealt within a gradient flow setting which was the method of choice for other elastic Cahn-Hilliard systems. We show existence, uniqueness and regularity results. In addition, several continuous dependence results with respect to different topologies are shown. Some of these results give uniqueness for weak solutions and other results will be helpful for optimal control problems.
On Technological Change and Yield Resiliency in Canadian Crop Yields
Creators: name: Ng, Horlick
name: Ker, Alan P.
name: Ng, Horlick
name: Ker, Alan P.
Publisher: name: Unknown
Year: 2019
Subjects: subject: Agricultural and Food Policy
subject: technological change
subject: yield volatility
subject: yield resiliency
subject: changing climate
subject: crop insurance

description: Feeding nine billion people by 2050, yield resiliency, climate change, and remaining economically competitive have received significant attention in the literature. Technological change in agriculture will largely dictate our ability to meet these challenges. Although there is significant literature on technological change in U.S. crop yields, very little has been done with Canadian yields. Moreover, the adoption and effect of various technologies and their interaction with climate tend to be crop-region specific. To this end, we model technological change in county-level yields for barley, canola, corn, oats, soybean and wheat in Canada. We use mixtures to allow and test for heterogeneous rates of technological change within the yield data generating process. While we tend to find increasing but heterogeneous rates of technological change, increasing and asymmetric yield volatility, and increasing absolute but decreasing relative yield resiliency, our results do differ across crops and exhibit spatial bifurcations within a crop. Using a standard attribution model, we find changing climate has differing effects across crops. We also consider the public funding implications of technological change for Canadian Business Risk Management programs.
Alphus tuberosus
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Alphus
Alphus tuberosus

description: 3. Alphus tuberosus (Germar, 1824)
Type locality — Brazil (Depository unknown). Distribution — Brazil (Bahia to Rio Grande do Sul), Paraguay, Argentina (Misiones).
 Lamia tuberosa Germar, 1824: 477.
 Leiopus tuberosus; Germar in Guérin­Méneville, 1839: 329.
 Alphus tuberosus; White, 1855: 375; Bates, 1862: 122; Zikán & Zikán, 1944: 34 (distr.); Zajciw, 1958a: 18, 23 (distr.); Buck, 1959: 603 (distr.); Viana, 1972: 369 (distr.); Zajciw, 1972a: 66 (distr.); 1974a: 76 (distr.); Martins, 1985: 178; Restello et al., 2001: 296, figs. 1, 6, 8.
  Amblysaphes Bates, 1885
 Amblysaphes Bates, 1885: 381.
 Type­species — Amblysaphes striatus Bates, 1885 (monotypy).
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
The boundary layer of VW Hyi in quiescence
Creators: name: Godon, Patrick
name: Sion, Edward M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this letter, we suggest that the missing boundary layer luminosity of dwarf novae in quiescence is released mainly in the ultraviolet (UV) as the second component commonly identified in the far ultraviolet (FUV) as the "accretion belt". We present the well-studied SU UMa-type system VW Hyi in detail as a prototype for such a scenario. We consider detailed multiwavelength observations and in particular the recent FUSE observations of VW Hyi which confirm the presence of a second component (the "accretion belt") in the FUV spectrum of VW Hyi in quiescence. The temperature (50,000K) and rotational velocity (> 3,000km/s) of this second FUV component are entirely consistent with the optically thick region (tau = 1) located just at the outer edge of optically thin boundary layer in the simulations of Popham (1999). This second component contributes 20% of the FUV flux, therefore implying a boundary layer luminosity: $L_{BL} = 2 \times (0.2 \times L_{UV} + L_{X-ray}) = 0.6 \times L_{disc}$, while the theory (Kluźniak 1987) predicts, for the rotation rate of VW Hyi's WD, $L_{BL} \approx 0.77 L_{disc}$. The remaining accretion energy ($<0.1 L_{acc}$) is apparently advected into the star as expected for optically thin advection dominated boundary layers. This scenario is consistent with the recent simultaneous X-ray and UV observations of VW Hyi by (Pandel, Córdova & Howell 2003), from which we deduced here that the alpha viscosity parameter in the boundary layer region must be as small as $α\approx 0.004$.
description: 4 pages
ANTECIPA and the organization of Heritage Science webinars and workshops in Brazil
Creators: name: Puglieri, Thiago
Publisher: name: Zenodo
Year: 2022
Subjects: Webinars, Workshops, Brazil

description: The talk was given at the workshop "Transatlantic Cooperation in Heritage Science", Cooperation theme 2: International Networking Initiatives in the Pandemic Times, held virtually on 6th October 2021.
description: This document reflects only the author(s)'s view and the Agency and the European Commission is not responsible for any use that may be made of the information it contains
Interaction of a wave with an accelerating object and the equivalence principle
Creators: name: Frank, A. I.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Physics (physics.gen-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A new look at the so-called effect of an accelerating matter is presented. It was previously stated that the effect is optical in nature and consists in changing the frequency of the wave passing through a refractive sample moving with acceleration. However, from a simple consideration based on the principle of equivalence, it follows that the idea of the connection of the effect only with the refraction phenomenon is unreasonably narrow, and a change in the wave frequency should inevitably occur during scattering by any object moving with acceleration. Such an object can be either an elementary scatterer or any device transmitting a narrowband signal.
description: 6 pages, 1 figure
Likelihood analysis of the newly observed $f_0(2020)$, $f_0(2330)$, and $f_0(2470)$ in $J/ψ\to γη^\primeη^\prime$ as high-lying unflavored scalar mesons
Creators: name: Liu, Cheng-Xi
name: Wang, Li-Ming
name: Li, Ting-Yan
name: Liu, Xiang
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Light mesons have always been an important part of the whole hadron family, once inspiring the SU(3) classification of hadrons as a typical example~\cite{Gell-Mann:1964ewy}. Until now, the search for light mesons has been an ongoing task in hadron physics. In particular, with the accumulation of experimental data, more and more light flavor mesons with the masses around 2.2 GeV were found, including the $Y(2175)$ observed in $J/ψ\to ηϕf_0(980)$~\cite{BES:2007sqy} and the $X(2370)$ reported in the decay of $J/ψ\to γη^\prime π^+π^-$~\cite{BESIII:2010gmv,BESIII:2019wkp}. These progresses show that there is a chance to construct the light meson family, which is also an effective approach to deepen our understanding of non-perturbative behavior of the strong interaction.
description: 11 pages, 8 figures and 3 tables. Accepted by Phys.Rev.D
Implementations of more general solid-state (SWAP)$^{1/m}$ and controlled-(swap)$^{1/m}$ gates
Creators: name: Liu, Wen-Qiang
name: Wei, Hai-Rui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Universal quantum gates are the core elements in quantum information processing. We design two schemes to realize more general (SWAP)$^{1/m}$ and controlled--(swap)$^{1/m}$ gates (for integer $m\geq1$) by directing flying single photons to solid--state quantum dots. The parameter $m$ is easily controlled by adjusting two quarter--wave plates and one half--wave plate. Additional computational qubits are not required to construct the two gates. Evaluations of the gates indicate that our proposals are feasible with current experimental technology.
description: 20 page,7 figures