cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Positron Driven High-Field Terahertz Waves in Dielectric Material
Creators: name: Majernik, N.
name: Andonian, G.
name: Williams, O. B.
name: O'Shea, B. D.
name: Hoang, P. D.
name: Clarke, C.
name: Hogan, M. J.
name: Yakimenko, V.
name: Rosenzweig, J. B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Advanced acceleration methods based on wakefields generated by high energy electron bunches passing through dielectric-based structures have demonstrated $>$GV/m fields, paving the first steps on a path to applications such as future compact linear colliders. For a collider scenario, it is desirable that, in contrast to plasmas, wakefields in dielectrics do not behave differently for positron and electron bunches. In this Letter, we present measurements of large amplitude fields excited by positron bunches with collider-relevant parameters (energy 20 GeV, and $0.7 \times 10^{10}$ particles per bunch) in a 0.4 THz, cylindrically symmetric dielectric structure. Interferometric measurements of emitted coherent Cerenkov radiation permit spectral characterization of the positron-generated wakefields, which are compared to those excited by electron bunches. Statistical equivalence tests are incorporated to show the charge-sign invariance of the induced wakefield spectra. Transverse effects on positron beams resulting from off-axis excitation are examined and found to be consistent with the known linear response of the DWA system. The results are supported by numerical simulations and demonstrate high-gradient wakefield excitation in dielectrics for positron beams.
description: 6 pages, 6 figures
Study of dijet events with large rapidity separation in proton-proton collisions at $\sqrt{s} =$ 2.76 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The cross sections for inclusive and Mueller-Navelet dijet production are measured as a function of the rapidity separation between the jets in proton-proton collisions at $\sqrt{s} =$ 2.76 TeV for jets with transverse momentum $p_\mathrm{T}$ $\gt$ 35 GeV and rapidity $\vert y\vert$ $\lt$ 4.7. Various dijet production cross section ratios are also measured. A veto on additional jets with $p_\mathrm{T}$ $\gt$ 20 GeV is introduced to improve the sensitivity to the effects of the Balitsky-Fadin-Kuraev-Lipatov (BFKL) evolution. The measurement is compared with the predictions of various Monte Carlo models based on leading-order and next-to-leading-order calculations including the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi leading-logarithm (LL) parton shower as well as the LL BFKL resummation.
description: Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/FSQ-13-004 (CMS Public Pages)
Pattern avoidance of $[4,k]$-pairs in circular permutations
Creators: name: Menon, Krishna
name: Singh, Anurag
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A05, 05A15, 05A19

description: The study of pattern avoidance in linear permutations has been an active area of research for almost half a century now, starting with the work of Knuth in 1973. More recently, the question of pattern avoidance in circular permutations has gained significant attention. In 2002-03, Callan and Vella independently characterized circular permutations avoiding a single permutation of size $4$. Building on their results, Domagalski et al. studied circular pattern avoidance for multiple patterns of size $4$. In this article, our main aim is to study circular pattern avoidance of $[4,k]$-pairs, i.e., circular permutations avoiding one pattern of size 4 and another of size $k$. We do this by using well-studied combinatorial objects to represent circular permutations avoiding a single pattern of size $4$. In particular, we obtain upper bounds for the number of Wilf equivalence classes of $[4,k]$-pairs. Moreover, we prove that the obtained bound is tight when the pattern of size $4$ in consideration is $[1342]$. Using ideas from our general results, we also obtain a complete characterization of the avoidance classes for $[4,5]$-pairs.
description: First section split into two; other minor changes; final version
Ferramenta da Terapia Narrativa: Terapia com bonecos
Creators: name: Brandl, Edenilson
Publisher: name: Zenodo
Year: 2024
Subjects: Ferramenta da Terapia Narrativa
Terapia Narrativa
Terapia com bonecos
Enciclopédia da Conscienciologia

description: Definologia: A terapia com bonecos é uma técnica terapêutica da Terapia Narrativa (TN), na qual o paciente utiliza bonecos ou figuras para representar diferentes partes de sua identidade e história, facilitando a expressão e exploração de emoções, experiências e conflitos internos.
A Time-Series Pattern Based Noise Generation Strategy for Privacy Protection in Cloud Computing
Creators: name: Zhang, Gaofeng
name: Yang, Yun
name: Liu, Xiao
name: Chen, Jinjun
Publisher: name: Swinburne
Year: 2024

description: Cloud computing promises an open environment where customers can deploy IT services in a pay-as-you-go fashion while saving huge capital investment in their own IT infrastructure. Due to the openness, various malicious service providers may exist. Such service providers may record service information in a service process from a customer and then collectively deduce the customer's private information. Therefore, from the perspective of cloud computing security, there is a need to take special actions to protect privacy at client sides. Noise obfuscation is an effective approach in this regard by utilising noise data. For instance, it generates and injects noise service requests into real customer service requests so that service providers would not be able to distinguish which requests are real ones if their occurrence probabilities are about the same. However, existing typical noise generation strategies mainly focus on the entire service usage period to achieve about the same final occurrence probabilities of service requests. In fact, such probabilities can fluctuate in a time interval such as three months and may significantly differ than other time intervals. In this case, service providers may still be able to deduce the customers' privacy from a specific time interval although unlikely from the overall period. That is to say, the existing typical noise generation strategies could fail to protect customers' privacy for local time intervals. To address this problem, we develop a novel time-series pattern based noise generation strategy. Firstly, we analyse previous probability fluctuations and propose a group of time-series patterns for predicting future fluctuated probabilities. Then, based on these patterns, we present our strategy by forecasting future occurrence probabilities of real service requests and generating noise requests to reach about the same final probabilities in the next time interval. The simulation evaluation demonstrates that our strategy can cope with these fluctuations to significantly improve the effectiveness of customers' privacy protection.
Cabin Acoustics in Aircraft Research
Creators: name: Langfeldt, Felix
Publisher: name: Zenodo
Year: 2019
Subjects: airplane
fuselage
hamburg
cabin
design
noise
metamaterials
LAB
NAIMMTA
KOKAGEL
COCLEA
aerolectures
aerolectures2019

description: Interior noise is of high importance when it comes to the acoustic design of passenger aircraft. The way passengers perceive the interior noise environment is an element of passenger comfort and part of the attractiveness on an airline. The presentation gives an overview of cabin noise aero-vibro-acoustic investigations of civil aircraft. In order to derive efficient noise control measures, it is essential to understand the noise source, the general excitation of the aircraft, the coupling into the fuselage and the transmission in detail. To come to this deep understanding many systematic investigations are necessary.
description: Hamburg Aerospace Lecture Series --- Collection of Presentations --- http://www.AeroLectures.de
Accurate relativistic chiral nucleon-nucleon interaction up to NNLO
Creators: name: Lu, Jun-Xu
name: Wang, Chun-Xuan
name: Xiao, Yang
name: Geng, Li-Sheng
name: Meng, Jie
name: Ring, Peter
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We construct a relativistic chiral nucleon-nucleon interaction up to the next-to-next-to-leading order in covariant baryon chiral perturbation theory. We show that a good description of the $np$ phase shifts up to $T_\mathrm{lab}=200$ MeV and even higher can be achieved with a $\tildeχ^2/\mathrm{d.o.f.}$ less than 1. Both the next-to-leading order results and the next-to-next-to-leading order results describe the phase shifts equally well up to $T_\mathrm{lab}=200$ MeV, but for higher energies, the latter behaves better, showing satisfactory convergence. The relativistic chiral potential provides the most essential inputs for relativistic ab initio studies of nuclear structure and reactions, which has been in need for almost two decades.
description: Accepted for publication in PRL. Uncertainty estimates updated and comparison with the Granada PWA added
Highly variable AFLP and S-SAP markers for the identification of ‘Malbec’ and ‘Syrah’ clones
Creators: name: Stajner, N.
name: Jakse, J.
name: Javornik, B.
name: Masuelli, R. W.
name: Martínez, L. E.
Publisher: name: VITIS - Journal of Grapevine Research
Year: 2015

description: The retrotransposon-based sequence-specific amplification polymorphism (S-SAP) and the amplified fragment length polymorphism (AFLP) marker systems were used to assess the clonal variation of 14 ‘Syrah’ and 22 ‘Malbec’ (Vitis vinifera L.) clones. The utility of S-SAP markers was compared to that of AFLP markers. On the basis of our results, S-SAP is more informative marker system and showed higher average number of polymorphic bands per cultivar group than AFLP. Relationships among clones were analyzed by cluster analysis using unweighted pair-groups using arithmetic averages and in both cases revealed well defined groups of clones, in which ‘Malbec’ clones were separated from ‘Syrah’ clones. High variability of some clones could also be seen within these clusters. The different levels of polymorphism for ‘Malbec’ and ‘Syrah’ obtained in this study suggest that ‘Malbec’ exhibits a higher mutation frequency than ‘Syrah’. Our results indicate that higher proportion of polymorphic bands in S-SAP makes it a less labour-intensive and more efficient approach for developing markers for clonal identification.
description: VITIS - Journal of Grapevine Research, Vol. 48 No. 3 (2009): Vitis
Evaluation of genetic diversity of Iranian grapevine accessions using microsatellite markers
Creators: name: Ramezani, A.
name: Haddad, R.
name: Dorostkar, M.
name: Mardi, M.
name: Naghavi, M. R.
Publisher: name: VITIS - Journal of Grapevine Research
Year: 2015

description: Research Note
description: VITIS - Journal of Grapevine Research, Vol. 48 No. 3 (2009): Vitis
Multilevel Resilience and HIV Virologic Suppression Among African American/Black Adults in the Southeastern United States
Creators: name: Earnshaw, V.A
name: Dulin, A.J
name: Wilson-Barthes, M.G
name: Carey, M.P
name: Dougherty-Sheff, S
name: Fava, J.L
name: Dale, S.K
name: Park, J.W
name: Agil, D
name: Johnson, B
name: Hogan, J.W
name: Mugavero, M.J
name: Napravnik, S
name: Howe, C.J
Publisher: name: Springer Science and Business Media Deutschland GmbH
Year: 2023

description: Objective: To assess overall and by neighborhood risk environments whether multilevel resilience resources were associated with HIV virologic suppression among African American/Black adults in the Southeastern United States. Setting and Methods: This clinical cohort sub-study included 436 African American/Black participants enrolled in two parent HIV clinical cohorts. Resilience was assessed using the Multilevel Resilience Resource Measure (MRM) for African American/Black adults living with HIV, where endorsement of a MRM statement indicated agreement that a resilience resource helped a participant continue HIV care despite challenges or was present in a participant’s neighborhood. Modified Poisson regression models estimated adjusted prevalence ratios (aPRs) for virologic suppression as a function of categorical MRM scores, controlling for demographic, clinical, and behavioral characteristics at or prior to sub-study enrollment. We assessed for effect measure modification (EMM) by neighborhood risk environments. Results: Compared to participants with lesser endorsement of multilevel resilience resources, aPRs for virologic suppression among those with greater or moderate endorsement were 1.03 (95% confidence interval: 0.96–1.11) and 1.03 (0.96–1.11), respectively. Regarding multilevel resilience resource endorsement, there was no strong evidence for EMM by levels of neighborhood risk environments. Conclusions: Modest positive associations between higher multilevel resilience resource endorsement and virologic suppression were at times most compatible with the data. However, null findings were also compatible. There was no strong evidence for EMM concerning multilevel resilience resource endorsement, which could have been due to random error. Prospective studies assessing EMM by levels of the neighborhood risk environment with larger sample sizes are needed.
INVENTARIO DI SET DI DATI E METADATI NELLA RETE LTER ITALIA
Creators: name: Oggioni, Alessandro
name: Carrara, Paola
name: Lanucara, Simone
name: Borsa, Roberta
Publisher: name: figshare
Year: 2015
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: INVENTARIO DI SET DI DATI E METADATI NELLA RETE LTER ITALIA
Enhancing the sensitivity and selectivity of pyrene-based sensors for detection of small gaseous molecules via destructive quantum interference
Creators: name: Sengul, O.
name: Völkle, J.
name: Valli, A.
name: Stadler, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Graphene-based sensors are exceptionally sensitive with high carrier mobility and low intrinsic noise, and have been intensively investigated in the past decade. The detection of individual gas molecules has been reported, albeit the underlying sensing mechanism is not yet well understood. We focus on the adsorption of NO$_2$, H$_2$O, and NH$_3$ on a molecular junction with a pyrene core, which can be considered as a minimal graphene-like unit. We systematically investigate the chemiresistive response within the framework of density functional theory and non-equilibrium Green's functions. We highlight the fundamental role of quantum interference (QI) in the sensing process, and we propose it as a paradigmatic mechanism for sensing. Owing to the open-shell character of NO$_2$, its interaction with pyrene gives rise to a Fano resonance thereby triggering the strongest chemiresistive response, while the weaker interactions with H$_2$O and NH$_3$ result in lower sensitivity. We demonstrate that by exploiting destructive QI arising in the meta-substituted pyrene, it is possible to calibrate the sensor to enhance both its sensitivity and chemical selectivity by almost two orders of magnitude so that individual molecules can be detected and distinguished. These results provide a fundamental strategy to design high-performance chemical sensors with graphene functional blocks.
description: 9 pages, 7 figures
Ferramenta da Terapia Narrativa: Perguntas Poderosas
Creators: name: Brandl, Edenilson
Publisher: name: Zenodo
Year: 2024
Subjects: Ferramenta da Terapia Narrativa
Terapia Narrativa
Perguntas Poderosas
Enciclopédia da Conscienciologia

description: Definologia: As perguntas poderosas são uma técnica terapêutica da Terapia Narrativa (TN), em que o terapeuta formula questionamentos desafiadores que visam desconstruir as suposições do paciente e promover uma reflexão mais profunda sobre sua narrativa pessoal.
Partial muon capture rates in $A=3$ and $A=6$ nuclei with chiral effective field theory
Creators: name: King, G. B.
name: Pastore, S.
name: Piarulli, M.
name: Schiavilla, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Searches for neutrinoless-double beta decay rates are crucial in addressing questions within fundamental symmetries and neutrino physics. The rates of these decays depend not only on unknown parameters associated with neutrinos, but also on nuclear properties. In order to reliably extract information about the neutrino, one needs an accurate treatment of the complex many-body dynamics of the nucleus. Neutrinoless-double beta decays take place at momentum transfers on the order of 100 MeV/$c$ and require both nuclear electroweak vector and axial current matrix elements. Muon capture, a process in the same momentum transfer regime, has readily available experimental data to validate these currents. In this work, we present results of {\it ab initio} calculations of partial muon capture rates for $^3$He and $^6$Li nuclei using variational and Green's Function Monte Carlo computational methods. We estimate the impact of the three-nucleon interactions, the cutoffs used to regularize two-nucleon ($2N$) interactions, and the energy range of $2N$ scattering data used to fit these interactions.
description: 10 pages, 5 figures including supplemental material; Re-analyzed GFMC $^3$He muon capture with updated wave functions, conclusions unchanged
A Local-Optimisation Based Strategy for Cost-Effective Datasets Storage of Scientific Applications in the Cloud
Creators: name: Yuan, Dong
name: Yang, Yun
name: Liu, Xiao
name: Chen, Jinjun
Publisher: name: Swinburne
Year: 2024

description: Massive computation power and storage capacity of cloud computing systems allow scientists to deploy computation and data intensive applications without infrastructure investment, where large application datasets can be stored in the cloud. However, due to the pay-as-you-go model, the datasets should be strategically stored in order to reduce the overall application cost. In this paper, by utilising Data Dependency Graph (DDG) from data provenances in scientific applications, deleted datasets can be regenerated, and as such we develop a novel cost-effective datasets storage strategy that can automatically store appropriate datasets in the cloud. This strategy achieves a localised optimal trade-off between computation and storage, meanwhile also taking users' tolerance of data accessing delay into consideration. Simulations conducted on general (random) datasets and a specific astrophysics pulsar searching application with Amazon's cost model show that our strategy can reduce the application cost significantly.
Continued development of V. vinifera inflorescence primordia in winter dormant buds
Creators: name: Jones, J. E.
name: Menary, R. C.
name: Wilson, S. J.
Publisher: name: VITIS - Journal of Grapevine Research
Year: 2015

description: Continued development of inflorescence primordia in winter dormant buds of Vitis vinifera 'Pinot Noir' is reported. In buds sampled from a commercial vineyard in the cool climate wine region of Southern Tasmania, mitotic activity was evident throughout the period from harvest to bud swell the following season. Results showed that in spite of buds entering apparent dormancy, cell division and inflorescence development continued throughout the winter months.
description: VITIS - Journal of Grapevine Research, Vol. 48 No. 3 (2009): Vitis
The Moon: The Next Step towards Sustainable Expansion into Space?
Creators: name: Sandrone, Silvio
Publisher: name: Zenodo
Year: 2019
Subjects: space
space flight
astronautics
moon
earth
orbiter
water
rare earths
lunar
ESM
CLTC
LCROSS
EL3
aerolectures2019
aerolectures

description: Although humans have not travelled beyond the Moon (or even back to the Moon, yet), global space business (excluding the downstream services) exceeds nowadays €80bn a year. This figure depends on a business model in which every kilogram of required hardware or resource is brought from Earth, which raises questions about its sustainability and growth potential. It is in this context that all major space powers are heading back to the Moon. The possibility of extracting raw materials, resources and – above all – rocket propellant, is what drives the US, Russia, China and others to prospect and settle around the lunar south pole. The presentation will outline the lunar programme of NASA and ESA, and introduce a few thoughts about Europe’s options for projecting influence and protecting its stake in a quest shaped by both co co- operation and competition.
description: Hamburg Aerospace Lecture Series --- Collection of Presentations --- http://www.AeroLectures.de
SHEVALARNING KELIB CHIQISH TARIXI
Creators: name: Palvonnazarova, Hayotxon
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada dialektologiya fanining kelib chiqishi, lahjalarning bir-biri bilan o‘xshash va farqli jihatlarini va dialektologiyaning bizga qanchalik muhim ekanligini to‘g‘risida atroflicha to‘xtalib o‘tilgan.
Numerical and Experimental Study of a Surging Point Absorber Wave Energy Converter
Creators: name: Bhinder, M.A.
name: CG Mingham
name: DM Causon
name: MT Rahmati
name: GA Aggidis
name: RV Chaplin
Publisher: name: figshare
Year: 2015
Subjects: subject: Environmental Science
subject: Oceanography
subject: FOS: Earth and related environmental sciences
subject: Mechanical Engineering
subject: FOS: Mechanical engineering

description: Published in EWTEC 2009
Superconducting aluminum heat switch with 3 n$Ω$ equivalent resistance
Creators: name: Butterworth, James
name: Triqueneaux, Sébastien
name: Midlik, Šimon
name: Golokolenov, Ilya
name: Gerardin, Anne
name: Gandit, Thibaut
name: Donnier-Valentin, Guillaume
name: Goupy, Johannes
name: Phuthi, M. Keith
name: Schmoranzer, David
name: Collin, Eddy
name: Fefferman, Andrew
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Superconducting heat switches with extremely low normal state resistances are needed for constructing continuous nuclear demagnetization refrigerators with high cooling power. Aluminum is a suitable superconductor for the heat switch because of its high Debye temperature and its commercial availability in high purity. We have constructed a high quality Al heat switch whose design is significantly different than that of previous heat switches. In order to join the Al to Cu with low contact resistance, we plasma etched the Al to remove its oxide layer then immediately deposited Au without breaking the vacuum of the e-beam evaporator. In the normal state of the heat switch, we measured a thermal conductance of $8 T$ W/K$^2$ which is equivalent to an electrical resistance of 3 n$Ω$ according to the Wiedemann-Franz law. In the superconducting state we measured a thermal conductance that is $2\times10^6$ times lower than that of the normal state at 50 mK.
Vivianite (ferrous phosphate) alleviates iron chlorosis in grapevine
Creators: name: Díaz, I.
name: Barrón, V.
name: Del Campillo, M. C.
name: Torrent, J.
Publisher: name: VITIS - Journal of Grapevine Research
Year: 2015

description: Synthetic vivianite [Fe3(PO4)2·8H2O] has been reported to alleviate iron (Fe) chlorosis in crops growing on calcareous soils. To test the effectiveness of vivianite in grapevine we carried out three-year (2003 to 2005) experiments in vineyards located in six different areas of Spain with Denomination of Origin (Rioja, Ribera del Duero, La Mancha, Montilla-Moriles, Condado de Huelva, and Jerez), which differed in grapevine rootstock/variety, climate, and soil properties. In all cases there was at least one treatment in which a suspension of vivianite was injected into the soil at the beginning of the experiment in spring, one control (“–Fe”, no Fe fertilizer added) treatment, and one or more treatments with Fe chelate (FeEDDHA) or an Fe(II) salt applied yearly. The concentration of chlorophyll per unit leaf area was estimated with a portable chlorophyll meter (readings in SPAD units). The SPAD value and the trunk perimeter increment of the vines fertilized with vivianite were significantly higher than those of the control (-Fe) vines through the three years in all fields except the Jerez one. Vivianite was not significantly more effective than Fe-sulfate (in Rioja field) or Fe chelate (in La Mancha field). Our results suggest in summary that vivianite is effective in improving the Fe nutrition of vine and has a significant long-lasting effect of at least three years. This is ascribed to vivianite being incongruently dissolved to produce a poorly crystalline Fe oxide phase (lepidocrocite), which is considered to be a good source of Fe to plant. Vivianite is effective, readily prepared in the field, not easily leached from the soil, cheap, and environmentally safe, constituting thus an adequate Fe fertilizer for grapevine.
description: VITIS - Journal of Grapevine Research, Vol. 48 No. 3 (2009): Vitis
Influence of internal design on the performance of pilot vacuum-assisted air-gap membrane distillation modules for brine concentration with solar energy
Creators: name: Requena, I.
name: Andrés-Mañas, J.A.
name: Zaragoza, G.
Publisher: name: Elsevier - Desalination. Volume 573, 15 March 2024, 117218.
Year: 2024

description: Membrane distillation (MD) in batch operation is proposed for brine concentration with solar energy in zero liquid discharge (ZLD) desalination processes, but there are some research gaps yet. Energy efficiency is key for implementing the technology with solar energy and there is not enough experience and experimental results of operation of MD pilot modules at high salinity feeds. This research focuses on the experimental evaluation and comparison of two multi-envelope spiral wound commercial membrane distillation modules operating in vacuum-assisted air gap MD at the solar MD pilot facilities of Plataforma Solar de Almería in Spain. These modules have similar membrane area (24 and 25.9 m2) and residence time (large, to maximize thermal efficiency), but different internal design: 6 envelopes 5 m long and 12 envelopes 2.7 m long, respectively. This difference affects mostly the feed circulation velocity for equal feed flow rate. Performance parameters such as permeate production and specific thermal energy consumption (STEC) are compared and experimental models performed and validated for different feed salinities. Permeate quality and specific electrical energy (SEEC) consumption are also evaluated. The results show that the best module for batch operation is the one with a larger number of channels but of shorter length.
Topology optimization of stiff structures under self-weight for given volume using a smooth Heaviside function
Creators: name: Kumar, Prabhat
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: This paper presents a density-based topology optimization approach to design structures under self-weight load. Such loads change their magnitude and/or location as the topology optimization advances and pose several unique challenges, e.g., non-monotonous behavior of compliance objective, parasitic effects of the low-stiffness elements, and unconstrained nature of the problems. The modified SIMP material scheme is employed with the three-field density representation technique (original, filtered, and projected design fields) to achieve optimized solutions~close~to~0-1. A novel mass density interpolation strategy is proposed using a smooth Heaviside function, which provides a continuous transition between solid and void states of elements and facilitates tuning of the non-monotonous behavior of the objective. A constraint that implicitly imposes a lower bound on the permitted volume is conceptualized using the maximum permitted mass and the current mass of the evolving design. Sensitivities of the objective and self-weight are evaluated using the adjoint-variable method. Compliance of the domain is minimized to achieve the optimized designs using the Method of Moving Asymptotes. The Efficacy and robustness of the presented approach are demonstrated by designing various 2D and 3D structures involving self-weight. The proposed approach maintains the constrained nature of the optimization problems and provides smooth and rapid objective convergence.
Genetic diversity in native Bulgarian grapevine germplasm (Vitis vinifera L.) based on nuclear and chloroplast microsatellite polymorphisms
Creators: name: Dzhambazova, T.
name: Tsvetkov, I.
name: Atanassov, I.
name: Rusanov, K.
name: Martínez-Zapater, J. M.
name: Atanassov, A.
name: Hvarleva, T.
Publisher: name: VITIS - Journal of Grapevine Research
Year: 2015

description: Fifty one wild specimens collected in different areas in Bulgaria and nineteen native Bulgarian grapevine cultivars were genotyped with 7 nuclear and 5 chloroplast SSR markers. Based on the microsatellite allelic profile six wild samples, collected from the Danube Riverbank, were considered non vinifera genotypes. The genetic diversity for nuclear loci observed in the cultivated grapevines was comparable to that found in other cultivated collections. However, lower genetic diversity was observed in the set of wild samples. The dendrogram based on nuclear SSRs separated most of the cultivated grapevines from the wild samples. Four chlorotypes corresponding to previously determined chlorotypes A, B, C and D, were identified in the analyzed samples that occurred with different frequencies in groups of wild and cultivated plants. The most frequent chlorotype among wild samples was A, while it was C in the cultivated samples. The differentiation of Bulgarian grape chlorotypes in the context of differentiation of chlorotypes in Eurasian grape flora is discussed.
description: VITIS - Journal of Grapevine Research, Vol. 48 No. 3 (2009): Vitis
Limited ferromagnetic interactions in monolayers of MPS$_3$ (M=Mn, Ni)
Creators: name: Autieri, Carmine
name: Cuono, Giuseppe
name: Noce, Canio
name: Rybak, Milosz
name: Kotur, Kamila M.
name: Agrapidis, Cliò Efthimia
name: Wohlfeld, Krzysztof
name: Birowska, Magdalena
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a systematic study of the electronic and magnetic properties of two-dimensional ordered alloys, consisting of two representative hosts (MnPS$_3$ and NiPS$_3$) of transition metal phosphorus trichalcogenides doped with $3d$ elements. For both hosts our DFT+U calculations are able to qualitatively reproduce the ratios and signs of all experimentally observed magnetic couplings. The relative strength of all antiferromagnetic exchange couplings, both in MnPS$_3$ as well as in NiPS$_3$, can successfully be explained using an effective direct exchange model: they reveal that the third-neighbor exchange dominates in NiPS$_3$ due to the filling of the $t_{2g}$ subshell, whereas for MnPS$_3$ the first neighbor exchange is prevailed owing to the presence of the $t_{2g}$ magnetism. On the other hand, the nearest neighbor ferromagnetic coupling in NiPS$_3$ can only be explained using a more complex superexchange model and is (also) largely triggered by the absence of the $t_{2g}$ magnetism. For the doped systems, the DFT+U calculations revealed that magnetic impurities do not affect the magnetic ordering observed in the pure phases and thus in general in these systems ferromagnetism may not be easily induced by such a kind of elemental doping. However, unlike for the hosts, the first and second (dopant-host) exchange couplings are of similar order of magnitude. This leads to frustration in case of antiferromagnetic coupling and may be one of the reasons of the observed lower magnetic ordering temperature of the doped systems.
description: 15 pages, 8 figures, 3 tables
Abstract (short proposal): Der Cliffhanger im seriellen Spannungserzählen. Zu einem repräsentativen Korpus populären Erzählens im 19. Jahrhundert Julian Schröter
Creators: name: Schröter, Julian
Publisher: name: Zenodo
Year: 2024

description: Projekt, gefördert durch die Vogel Stiftung Dr. Eckernkamp Würzburg seit 2023
Assessing the Performances of CASPT2 and NEVPT2 for Vertical Excitation Energies
Creators: name: Sarkar, Rudraditya
name: Loos, Pierre-François
name: Boggio-Pasqua, Martial
name: Jacquemin, Denis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Methods able to simultaneously account for both static and dynamic electron correlations have often been employed, not only to model photochemical events, but also to provide reference values for vertical transition energies, hence allowing to benchmark lower-order models. In this category, both CASPT2 and NEVPT2 are certainly popular, the latter presenting the advantage of not requiring the application of the empirical ionization-potential-electron-affinity (IPEA) and level shifts. However, the actual accuracy of these multiconfigurational approaches is not settled yet. In this context, to assess the performances of these approaches the present work relies on highly-accurate ($\pm 0.03$ eV) \emph{aug}-cc-pVTZ vertical transition energies for 284 excited states of diverse character (174 singlet, 110 triplet, 206 valence, 78 Rydberg, 78 $n \to π^*$, 119 $π\to π^*$, and 9 double excitations) determined in 35 small- to medium-sized organic molecules containing from three to six non-hydrogen atoms. The CASPT2 calculations are performed with and without IPEA shift and compared to the partially-contracted (PC) and strongly-contracted (SC) variants of NEVPT2. We find that both CASPT2 with IPEA shift and PC-NEVPT2 provide fairly reliable vertical transition energy estimates, with slight overestimations and mean absolute errors of $0.11$ and $0.13$ eV, respectively. These values are found to be rather uniform for the various subgroups of transitions. The present work completes our previous benchmarks focussed on single-reference wave function methods (\textit{J.~Chem. Theory Comput.} \textbf{14}, 4360 (2018); \emph{ibid.}, \textbf{16}, 1711 (2020)), hence allowing for a fair comparison between various families of electronic structure methods. In particular, we show that ADC(2), CCSD, and CASPT2 deliver similar accuracies for excited states with a dominant single-excitation character.
description: 21 pages, 3 figure (supporting information available)
Deepening inside the homonyms of 'Wildbacher' by means of SSR markers
Creators: name: Meneghetti, S.
name: Costacurta, A.
name: Crespan, M.
name: Maul, E.
name: Hack, R.
name: Regner, F.
Publisher: name: VITIS - Journal of Grapevine Research
Year: 2015

description: Sixteen accessions of the grapevine cultivar 'Wildbacher' coming from different European repositories and from Styrian and Italian private vineyards were analysed by genetic fingerprinting with SSR markers. Five different molecular profiles were found, confirming that the name 'Wildbacher' is commonly used as a homonym. Several new genotypes could be linked to the previous list of the 'Wildbacher' family. In particular, in Italian commercial vineyards two main 'Wildbacher' varieties defined by A and B genetic profiles were found. They correspond to the two reference genotypes from Styria, 'Wildbacher Blau' ('Blauer Wildbacher)' and 'Wildbacher Spätblau'. In both countries 'Wildbacher Blau' represents the most spread and better performing type and it is earlier ripening compared to 'Wildbacher Spätblau'. They were morphologically and genetically very similar to each other and they shared at least one allele at each of the 11 SSR loci analyzed for cultivar identification. Three different other 'Wildbacher' genotypes from a German collection were identified as individual cultivars. While 'Rotblättriger' (genotype C) and 'Frühblau' from Germany (genotype D) showed some genetic similarity with A and B genotypes, E 'Wildbacher', coming from Hungary, proved to have a distinct genetic profile. Close relationship to the key variety (for the development of European diversity) 'Heunisch' is indicated by sharing one allele at all loci investigated so far. There exist some indications that the second parent is an extinct wild vine. Evaluation of morphological parameters resulted in some differences among all five genotypes.
description: VITIS - Journal of Grapevine Research, Vol. 48 No. 3 (2009): Vitis
Forecasting Duration Intervals of Scientific Workflow Activities Based on Time-Series Patterns
Creators: name: Liu, Xiao
name: Chen, Jinjun
name: Liu, Ke
name: Yang, Yun
Publisher: name: Swinburne
Year: 2024

description: In scientific workflow systems, time related functionalities such as workflow scheduling and temporal verification normally require effective forecasting of activity durations due to the dynamic nature of underlying resources such as Web or Grid services. However, most existing strategies cannot handle well the problems of limited sample size and frequent turning points which are typical for the duration series of scientific workflow activities. To address such problems, we propose a novel pattern based time-series forecasting strategy which utilises a periodical sampling plan to build representative duration series, and then conducts time-series segmentation to discover the smallest pattern set and predicts the activity duration intervals with pattern matching results. The simulation experiment demonstrates the excellent performance of our segmentation algorithm and further shows the effectiveness of our strategy in the prediction of activity duration intervals, especially the ability of handling turning points.
Stellarator optimization for nested magnetic surfaces at finite $β$ and toroidal current
Creators: name: Baillod, A.
name: Loizu, J.
name: Graves, J. P.
name: Landreman, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Good magnetic surfaces, as opposed to magnetic islands and chaotic field lines, are generally desirable for stellarators. In previous work, M. Landreman et al. [Phys. of Plasmas 28, 092505 (2021)] showed that equilibria computed by the Stepped-Pressure Equilibrium Code (SPEC) [S. P. Hudson et al., Phys. Plasmas 19, 112502 (2012)] could be optimized for good magnetic surfaces in vacuum. In this paper, we build upon their work to show the first finite-$β$, fixed- and free-boundary optimization of SPEC equilibria for good magnetic surfaces. The objective function is constructed with the Greene's residue of selected rational surfaces and the optimization is driven by the SIMSOPT framework [M. Landreman et al., J. Open Source Software 6, 3525 (2021)]. We show that the size of magnetic islands and the consequent regions occupied by chaotic field lines can be minimized in a classical stellarator geometry by optimizing either the injected toroidal current profile, the shape of a perfectly conducting wall surrounding the plasma (fixed-boundary case), or the coils (free-boundary case), in a reasonable amount of computational time. This work shows that SPEC can be used as an equilibrium code both in a two-step or single-step stellarator optimization loop.
description: 6 pages, 4 figures, to be submitted to Physics of Plasmas
Ultraviolet dimensional reduction of spacetime with zero-point length
Creators: name: Mondal, Vikramaditya
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Among the many disparate approaches towards quantum gravity, the reduction of spacetime dimension in the ultraviolet regime is expected to be a common thread. The dimensionality of spacetime can be defined in various contexts. The spectral dimension of spacetime is defined in the context of diffusion processes on a manifold. We show that a spacetime with zero-point length has spectral dimension $3.5$ when the characteristic diffusion time has the size of the zero-point length. The spectral dimension (negatively) diverges for an even shorter diffusion time, thus preventing any reliable physical interpretation in the deep ultraviolet regime. The thermodynamic dimension is defined by realizing that the free energy $F(β)$ of a free field or ideal gas at finite temperature ($β^{-1}$) in $D$ dimensions scales as $F\sim β^{-D}$. Using Schwinger's proper time formalism at finite temperature, we show that for spacetime incorporating a zero-point length, the thermodynamic dimension reduces to $1.5$ near the Planck scale and then to $1$ in the deep ultraviolet regime. This signifies a "phase-transition" in which a (massless) bosonic ideal gas in four dimensions essentially behaves like radiation ($w=1/3$) at low energies, whereas near the Planck scale, it behaves equivalently to having an equation of state parameter $w=2$. Furthermore, dimension can be deduced from the potential $V_D(r)$ of interaction between two point-like sources separated at a distance $r$ as its scaling depends on $D$. Comparing with the scaling behavior of conventional Yukawa-like potentials at short distances, we show that the zero-point length spacetime's ultraviolet dimension appears to be either $2$ or $3$ depending on the use of massive or massless force carriers as probes.
Cryopreservation of embryogenic cell suspensions of the Spanish grapevine cultivars ‘Albariño’ and ‘Tempranillo’
Creators: name: González-Benito, M. E.
name: Martín, C.
name: Vidal, J. R.
Publisher: name: VITIS - Journal of Grapevine Research
Year: 2015

description: Embryogenic cell suspensions of two elite Spanish grapevine cultivars (‘Albariño’ and ‘Tempranillo’) were successfully cryopreserved by encapsulation-dehydration. The method implied the encapsulation of cells in alginate beads, subsequent culture in liquid medium with 1 M sucrose for 4 days, and desiccation for 2-4 h in the flow of a laminar-flow bench, before immersing in liquid nitrogen. With this simple method, up to 50 % of cell viability in the cryopreserved beads was measured (using the triphenyl tetrazolium method), which corresponded to vigorous growth of 100 % of beads after culture on semi-solid medium. The cryopreserved encapsulated cells were successfully used for initiation of new cell suspensions and their embryogenic capacity was studied. This cryopreservation method is an advance to store ready-to-use competent embryogenic tissue for grapevine genetic transformation projects.
description: VITIS - Journal of Grapevine Research, Vol. 48 No. 3 (2009): Vitis
Evaluation of the phosphomannose isomerase-based selection system for gene transfer in grape
Creators: name: Vaccari, I.
name: Martinelli, L.
Publisher: name: VITIS - Journal of Grapevine Research
Year: 2015

description: The suitability of the PMI-based system for efficient gene transfer in grape was assessed on V. vinifera ‘Brachetto’ and ‘Chardonnay’ and the rootstock '110 Richter'. The effect of mannose on non-transformed tissues was evaluated during a long culture period in the crucial stages of morphogenesis from callus to plantlet. Grape tissues of the genotypes used were affected by mannose as the carbohydrate source, damage, however, appeared after extremely long culture times. In addition, plantlets were regenerated from embryogenic calli after co-culture with Agrobacterium LBA 4404 carrying the manA gene in the PMI-GUS-Intron plasmid based on the pNOV2819 vector by Syngenta (Positech® system). Plants recovered after selection in the presence of mannose were found to be non-transgenic for the manA gene. Accordingly, PMI seems to be an unsuitable alternative to traditional marker gene selection for successful gene transfer in grape.
description: VITIS - Journal of Grapevine Research, Vol. 48 No. 3 (2009): Vitis
Galactic tides and the Crater II dwarf spheroidal: a challenge to LCDM?
Creators: name: Borukhovetskaya, Alexandra
name: Navarro, Julio F.
name: Errani, Raphael
name: Fattahi, Azadeh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The unusually low velocity dispersion and large size of Crater II pose a challenge to our understanding of dwarf galaxies in the Lambda Cold Dark Matter (LCDM) cosmogony. The low velocity dispersion suggests either a dark halo mass much lower than the minimum expected from hydrogen cooling limit arguments, or one that is in the late stages of extreme tidal stripping. The tidal interpretation has been favoured in recent work and is supported by the small pericentric distances consistent with available kinematic estimates. We use N-body simulations to examine this interpretation in detail, assuming a Navarro-Frenk-White (NFW) profile for Crater II's progenitor halo. Our main finding is that, although the low velocity dispersion can indeed result from the effect of tides, the large size of Crater II is inconsistent with this hypothesis. This is because galaxies stripped to match the observed velocity dispersion are also reduced to sizes much smaller than the observed half-light radius of Crater II. Unless its size has been substantially overestimated, reconciling this system with LCDM requires that either (i) it is not bound and near equilibrium (unlikely, given its crossing time is shorter than the time elapsed since pericentre), or that (ii) its progenitor halo deviates from the assumed NFW profile. The latter alternative may signal that baryons can affect the inner halo cusp even in extremely faint dwarfs or, more intriguingly, may signal effects associated with the intimate nature of the dark matter, such as finite self-interactions, or other such deviations from the canonical LCDM paradigm.
description: 12 pages, 10 figures, 3 tables. Accepted for publication in MNRAS
Neutral bremsstrahlung electroluminescence in noble liquids
Creators: name: Borisova, E.
name: Buzulutskov, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Proportional electroluminescence (EL) is the physical effect used in two-phase dark matter detectors, to optically record in the gas phase the ionization signal produced by particle scattering in the liquid phase. In our previous works the presence of a new EL mechanism in noble gases, namely that of neutral bremsstrahlung (NBrS), was demonstrated both theoretically and experimentally, in addition to the ordinary EL mechanism due to excimer emission. In this work we show that the similar theoretical approach can apply to noble liquids, namely to liquid helium, neon, argon, krypton and xenon. In particular, the photon yields and spectra for NBrS EL in noble liquids have for the first time been calculated, using the electron energy and transport parameters obtained in the framework of Cohen-Lekner and Atrazhev theory. The relevance of the results obtained to the development of noble liquid detectors for dark matter searches and neutrino experiments is discussed.
description: 7 pages, 6 figures