cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On The Evaluation of Collision Probability along a Path
Creators: name: Paiola, Lorenzo
name: Grioli, Giorgio
name: Bicchi, Antonio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Characterizing the risk of operations is a fundamental requirement in robotics, and a crucial ingredient of safe planning. The problem is multifaceted, with multiple definitions arising in the vast recent literature fitting different application scenarios and leading to different computational approaches. A basic element shared by most frameworks is the definition and evaluation of the probability of collision for a mobile object in an environment with obstacles. We observe that, even in basic cases, different interpretations are possible. This paper proposes an index we call "Risk Density", which offers a theoretical link between conceptually distant assumptions about the interplay of single collision events along a continuous path. We show how this index can be used to approximate the collision probability in the case where the robot evolves along a nominal continuous curve from random initial conditions. Indeed, under this hypothesis the proposed approximation outperforms some well-established methods either in accuracy or computational cost.
Debris Disks in NGC 2547
Creators: name: Gorlova, N.
name: Balog, Z.
name: Rieke, G. H.
name: Muzerolle, J.
name: Su, K. Y. L.
name: Ivanov, V. D.
name: Young, E. T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have surveyed the 30 Myr-old cluster NGC 2547 for planetary debris disks using Spitzer. At 4.5-8 um we are sensitive to the photospheric level down to mid-M stars (0.2 Msol) and at 24 um to early-G stars (1.2 Msol). We find only two to four stars with excesses at 8 um out of ~400-500 cluster members, resulting in an excess fraction
description: Accepted to ApJ, 29 pages, 13 figs. A Note in Proof concerning cluster's age was added in the original submission of 2007 July 19. Full Tables 1 and 2 in the electronic form together with the article with full resolution figures are available at http://www.astro.ufl.edu/~ngorlova/disksNGC2547/
What do our research friends say about the coexistence and confrontation of agricultural and food models? Introduction to the special issue
Creators: name: Gasselin, Pierre
name: Hostiou, Nathalie
name: Gasselin, Pierre
name: Hostiou, Nathalie
Publisher: name: Unknown
Year: 2020
Subjects: subject: Agricultural and Food Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Coexistence
subject: Confrontation
subject: Agricultural models
subject: Food models

description: The coexistence and confrontation of agricultural and food models are an issue that is evincing much interest from the media and the political and professional fields. It is also an active area of research, a fact which led to a call for articles and the publication of a special issue. This article introduces and analyzes the 9 articles selected and published in 2020, and characterizes the diversity of the associated research (issues, fields, disciplines). After shedding light on the polysemy involved, as well as the fundamentals of the concept of agricultural and food model mobilized by the authors, we examine how they consider situations of coexistence. We identify three epistemological postures that reflect the contrasting positions of the authors vis-à-vis knowledge, actors, and action: functionalist coexistence, coexistence based on power relations, and coexistence in a transition perspective. These studies encourage the development of new research perspectives, in particular in order to make progress in the theorization of the coexistence and confrontation of agricultural and food models.
Direct measurement of isotope shifts in the barium 6s$^2$ $^1$S$_0$-5d6p $^3$D$^\text{o}_1$ transition
Creators: name: Choi, Jungwoo
name: Lee, Eunhwi
name: Yum, Dahyun
name: An, Kyoungwon
name: Kim, Junki
Publisher: name: arXiv
Year: 2023
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report the direct measurement of isotope shifts of the barium 6s$^2$ $^1$S$_0$ --5d6p $^3$D$^\text{o}_1$ 413-nm electric quadrupole transition, which is utilized for efficient barium ion trapping via photoionization using a single coherent light source. The measured isotope shifts relative to $^{138}$Ba are $392.9\pm0.9$ MHz, $178.1\pm0.8$ MHz, $401.4\pm1.2$ MHz, and $124.3\pm1.3$ MHz for isotopes with atomic numbers 137, 136, 135, and 134, respectively. We verify the measured isotopes with King plot analysis and compare the result with the formerly known shifts inferred from previous studies on neighboring transitions. The results can be used for efficient isotope selective loading of low-abundant barium ions, while careful suppression of line broadening is required for successful isotopic selectivity.
description: 12 pages, 9 figures
Quantum Algorithms and Oracles with the Scalable ZX-calculus
Creators: name: Carette, Titouan
name: D'Anello, Yohann
name: Perdrix, Simon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The ZX-calculus was introduced as a graphical language able to represent specific quantum primitives in an intuitive way. The recent completeness results have shown the theoretical possibility of a purely graphical description of quantum processes. However, in practice, such approaches are limited by the intrinsic low level nature of ZX calculus. The scalable notations have been proposed as an attempt to recover an higher level point of view while maintaining the topological rewriting rules of a graphical language. We demonstrate that the scalable ZX-calculus provides a formal, intuitive, and compact framework to describe and prove quantum algorithms. As a proof of concept, we consider the standard oracle-based quantum algorithms: Deutsch-Jozsa, Bernstein-Vazirani, Simon, and Grover algorithms, and we show they can be described and proved graphically.
description: In Proceedings QPL 2021, arXiv:2109.04886
On the unequal coexistence of agrifood systems in Brazil
Creators: name: Sencébé, Yannick
name: Pinton, Florence
name: Cazella, Ademir Antonio
name: Sencébé, Yannick
name: Pinton, Florence
name: Cazella, Ademir Antonio
Publisher: name: Unknown
Year: 2020
Subjects: subject: Agricultural and Food Policy
subject: Food Security and Poverty
subject: Coexistence
subject: Agrifood systems
subject: Food sovereignty
subject: Food security
subject: Family farming
subject: Agroecology
subject: Agribusiness
subject: Brazil

description: This article examines the coexistence in Brazil of two projects: a project for food sovereignty based on family farming and a project for food security based on agribusiness. Drawing on a series of field investigations focused on family farming, questions of land tenure, and policies to promote food security in Brazil, our analysis seeks to place the competition between family farming and agribusiness in historical context, examining the “unequal coexistence” of these two projects within the state apparatus from 1985 to 2015. We show how the project for food sovereignty brought together multiple social movements, including a core movement advocating agroecology, and how family farming was recognized as a key pillar within Brazil’s national food security policy. Over the same period, however, agribusiness became more organized and was strengthened by considerable state support, securing Brazil’s position of leadership within international commodity markets even as it “greened” its image. Faced with the economic and political crisis that has shaken the country since 2015, the project for food sovereignty has declined, while agribusiness and its high-technology, global agrifood system have continued to expand, opening a path for an agricultural scenario in which the right to coexistence is nothing more than a utopian idea.
High-Speed Voltage Control in Active Distribution Systems with Smart Inverter Coordination and Deep Reinforcement Learning
Creators: name: Golgol, Mohammad
name: Pal, Anamitra
Publisher: name: arXiv
Year: 2023
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The increasing penetration of renewable energy resources in distribution systems necessitates high-speed monitoring and control of voltage for ensuring reliable system operation. However, existing voltage control algorithms often make simplifying assumptions in their formulation, such as real-time availability of smart meter measurements (for monitoring), or real-time knowledge of every power injection information(for control).This paper leverages the recent advances made in highspeed state estimation for real-time unobservable distribution systems to formulate a deep reinforcement learning-based control algorithm that utilizes the state estimates alone to control the voltage of the entire system. The results obtained for a modified (renewable-rich) IEEE34-nodedistributionfeeder indicate that the proposed approach excels in monitoring and controlling voltage of active distribution systems.
Resonant relaxation near a massive black hole: the dependence on eccentricity
Creators: name: Gürkan, M. Atakan
name: Hopman, Clovis
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The orbits of stars close to a massive black hole are nearly Keplerian ellipses. Such orbits exert long term torques on each other, which lead to an enhanced angular momentum relaxation known as resonant relaxation. Under certain conditions, this process can modify the angular momentum distribution and affect the interaction rates of the stars with the massive black hole more efficiently than non-resonant relaxation. The torque on an orbit exerted by the cluster depends on the eccentricity of the orbit. In this paper, we calculate this dependence and determine the resonant relaxation timescale as a function of eccentricity. In particular, we show that the component of the torque that changes the magnitude of the angular momentum is linearly proportional to eccentricity, so resonant relaxation is much more efficient on eccentric orbits than on circular orbits.
description: 6 pages, 5 figures, submitted to MNRAS main journal
Higher-Dimensional Minimal Theory of Mass-Varying Massive Gravity And Its Cosmological Consequences
Creators: name: Falah, Ahmad Khoirul
name: Latief, Andy Octavian
name: Alatas, Husin
name: Gunara, Bobby Eka
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: In this paper we construct higher-dimensional minimal theory of mass-varying massive gravity (MTMVMG) where the masslike scalar potential is coupled to a vielbein potential, unlike in the previous literature where it is coupled to metric, such that the number of graviton degrees of freedom in the theory is the same as in general relativity. We then study the cosmological aspects of this theory and show that it has eight critical points: five in the massless sector and three in the massive sector. In contrast to the standard theory of mass-varying massive gravity where the graviton mass asymptotically approaches zero at late times, hence making the contribution of massive gravity to the late-time cosmic expansion minimum, the MTMVMG can provide good descriptions both in the massless and massive sectors. Especially, there are at least two interesting possible scenarios for the late-time cosmology in the theory: the dark energy is either due to the constant graviton mass which comes from the scalar field that becomes frozen after the reheating era, or due to the quintessence paradigm where the scalar field is dynamic. Therefore, if the accelerating expansion of the universe in the massless sector can be explained by standard quintessence paradigm, in the massive sector it has to be explained by the nontrivial interplay between quintessence and massive gravity.
description: 20 pages, 2 column, 4 figures, 2 tables. Minor corrections related to vielbein and references. Match version with Phys Rev D
ALP Anarchy
Creators: name: Chadha-Day, Francesca
name: Maxwell, James
name: Turner, Jessica
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: String theory models generically predict the existence of multiple axion-like particle (ALP) fields, yet the majority of both theoretical and experimental works have assumed only one ALP. In this paper, we discuss the phenomenology of systems with multiple ALPs that can undergo oscillations akin to neutrino oscillations. Motivated by this effect, we extend the 'anarchy' framework, which has been used to predict neutrino oscillation parameters, to generate the parameters of many ALP systems. We explore the phenomenology of these ALP anarchy models in some of the leading ALP search strategies, including the CERN Axion Solar Telescope, magnetic white dwarfs and the gamma-ray spectra of distant blazars. We include both the ALP-photon and the ALP-electron coupling. We find that ALP anarchy models predict drastically different results than single ALP models.
description: 19 pages, 7 figures; Typo corrected in eq(6.5); Additional details added to section headers; Results Unchanged
The impossible and necessary coexistence of agricultural development models in the Pampas: the case of Santa Fe province (Argentina)
Creators: name: Albaladejo, Christophe
name: Albaladejo, Christophe
Publisher: name: Unknown
Year: 2020
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Food Consumption/Nutrition/Food Safety
subject: Argentina
subject: Pampas
subject: Agroecology
subject: Agribusiness
subject: Family farming
subject: Territorial development

description: This article’s objective is to highlight the different forms of agriculture present in the Argentinian Pampas, to analyse their logics, in particular in their relationships to the territory, and to discuss the relationships they have with each other. The theoretical framework adopted is that of “territorial pacts”. This framework makes it possible to define for each form of agriculture through three dimensions of its local integration into the territory (territorial mediation) and through four dimensions of its integration into institutions (agricultural development model). This theoretical framework was taught and put into practice by a team of 7 or 8 researchers and teacher-researchers and 80 fifth-year students of agronomy within the framework of a 1-week study trip repeated in three consecutive years in Santa Fe province. This is an interesting province for studying this subject because of the historical importance of family farming and the growth of large business farms. The method includes analyses of the agronomist’s skills and reflections with students. Three agricultural development models could be distinguished and analysed: business farming, small-scale family farming and conventional farming. These models highlight the roles of technicians, cities, markets, symbolic issues and personal projects. In conclusion, it appears that relationships between these different models are more along the lines of a co-presence and not of a coexistence. The latter would require the construction of a local public space and a profound change in the models’ current strategies. Nevertheless, a plural conception—and one that is open to dialogue—of the study programmes of the university faculties of agronomy could be a first step towards coexistence, since it appears that these faculties are at the centre of the tensions arising from co-presence.
Exploring the impact of a rapidly decelerating bar on transforming bulge orbits into disc-like orbits
Creators: name: Li, Chengdong
name: Yuan, Zhen
name: Monari, Giacomo
name: Martin, Nicolas F.
name: Siebert, Arnaud
name: Famaey, Benoit
name: Chiba, Rimpei
name: Kordopatis, Georges
name: Ibata, Rodrigo A.
name: Hill, Vanessa
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The most metal-poor tail of the Milky Way ([Fe/H] $\leq$ $-$2.5) contains a population of stars with very prograde planar orbits, which is puzzling in both their origin and evolution. A possible scenario is that they are shepherded by the bar from the inner Galaxy, where many of the old and low-metallicity stars in the Galaxy are located. To investigate this scenario, we use test-particle simulations with an axisymmetric background potential plus a central bar model. The test particles are generated by an extended distribution function (EDF) model based on the observational constraints of bulge stars. According to the simulation results, a bar with constant pattern speed cannot help bring stars from the bulge to the solar vicinity. In contrast, when the model includes a rapidly decelerating bar, some bulge stars can gain rotation and move outwards as they are trapped in the co-rotation regions of the bar. The resulting distribution of shepherded stars heavily depends on the present-day azimuthal angle between the bar and the Sun. The majority of the low-metallicity bulge stars driven outwards are distributed in the fourth quadrant of the Galaxy with respect to the Sun, and about 10$\%$ of them are within 6 kpc from us. Our experiments indicate that the decelerating bar perturbation can be a contributing process to explain part of the most metal-poor stars with prograde planar orbits seen in the Solar neighborhood but is unlikely to be the dominant one.
description: 12 pages, 11 figures, Accepted to A&A
Algebraic aspects and functoriality of the set of affiliated operators
Creators: name: Ghosh, Indrajit
name: Nayak, Soumyashant
Publisher: name: arXiv
Year: 2023
Subjects: subject: Operator Algebras (math.OA)
subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 46L10 (Primary) 47C15, 47L60, 46M15, 47B02 (Secondary)

description: In this article, we aim to provide a satisfactory algebraic description of the set of affiliated operators for von Neumann algebras. Let $\mathscr{M}$ be a von Neumann algebra acting on a Hilbert space $\mathcal{H}$, and let $\mathscr{M}_{\text{aff}}$ denote the set of unbounded operators of the form $T = AB^{\dagger}$ for $A, B \in \mathscr{M}$ with $\ker(B)\subseteq\ker(A)$ , where $(\cdot)^{\dagger}$ denotes the Kaufman inverse. We show that $\mathscr{M}_{\text{aff}}$ is closed under product, sum, Kaufman-inverse and adjoint, and has the structure of a right near-semiring; Moreover, the above quotient representation of an operator in $\mathscr{M}_{\text{aff}}$ is essentially unique. The Murray-von Neumann affiliated operators for $\mathscr{M}$ turn out to be precisely the closed operators in $\mathscr{M}_{\text{aff}}$. Let $Φ$ be a unital normal homomorphism between represented von Neumann algebras $(\mathscr{M}; \mathcal{H})$ and $(\mathscr{N}; \mathcal{K})$. With the help of the quotient representation, we obtain a canonical extension of $Φ$ to a mapping $Φ_{\text{aff}} : \mathscr{M}_{\text{aff}} \to \mathscr{N}_{\text{aff}}$ which respects sum, product, Kaufman-inverse, and adjoint. Thus $\mathscr{M}_{\text{aff}}$ is intrinsically associated with $\mathscr{M}$ and transforms functorially as we change representations of $\mathscr{M}$. Furthermore, $Φ_{\text{aff}}$ preserves operator properties such as being symmetric, or positive, or accretive, or sectorial, or self-adjoint, or normal, and also preserves the Friedrichs and Krein-von Neumann extensions of densely-defined closed positive operators. As a proof of concept, we transfer some well-known results about closed unbounded operators to the setting of closed affiliated operators for properly infinite von Neumann algebras, via `abstract nonsense'.
description: 39 pages. Accepted for publication in IMRN
Women and work in Indonesia from 1970 to 1985 : capitalism and gender inequality in perspective
Creators: name: Elmhirst, Rebecca Jane
Publisher: name: University of British Columbia
Year: 2010

description: This thesis is written in the context of studies of women in the Third World. Broadly, concern is given to contemporary critiques of Western feminist theory which question the capacity of general theory to speak to the specificity of women's positions in places other than the West. In order to engage with women's different experiences of gender inequality, without losing a sense of a general feminist problematic, this study uses a theoretical framework that emphasizes the ways in which ideologies concerning gender inequality are constructed and experienced in locally specific ways. These issues are examined through a consideration of women's position in the labour market in Indonesia. The 1970s and early 1980s were periods of considerable economic restructuring and rapid social change in Indonesia. Within the labour market, income-generating possibilities shifted from agricultural production to the service sector and, to a lesser extent, to industry. More recently (the early 1980s), employment in the industrial sector has been further curtailed as Indonesia entered a period of economic austerity in response to declining world oil prices, among other factors. Taking this situation as a point of departure, this thesis examines changes and continuities in women's position in the labour market from 1970 to 1985, using data from the Indonesian census and Intercensal survey, and from various ethnographic accounts of women in the workforce. Women's labour force participation and their concentration in particular sectors and occupations is interpreted as a response to capitalist restructuring and also to the construction of an ideology of gender which, through state rhetoric and development policy, is redefining women as wives and mothers: according to a particular conception of what those roles entail. It is argued that the ideology of familialism has re-ascribed tasks, tools and conditions of work as "female" or "male". Within an already constrained situation brought about by capitalist restructuring in Indonesia in general, income-generating possibilities for women are even more limited. According to the familial ideology that is being promoted by the state, women are being encouraged to leave the waged workforce, or are able to work only at its margins.
Optimal combination of immune checkpoint and senescence molecule predicts adverse outcomes in patients with acute myeloid leukemia
Creators: name: Wang, Peipei
name: Zhang, Yuling
name: Cai, Qinghua
name: Long, Qingqin
name: Pan, Shiyi
name: Zhou, Wei
name: Deng, Tingfen
name: Mo, Wenjian
name: Wang, Shunqing
name: Zhang, Yuping
name: Wang, Caixia
name: Chen, Cunte
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Hematology

description: High expression of immune checkpoints (ICs) and senescence molecules (SMs) contributes to T cell dysfunction, tumor escape, and progression, but systematic evaluation of them in co-expression patterns and prognosis in acute myeloid leukemia (AML) was lacking. Three publicly available datasets (TCGA, Beat-AML, and GSE71014) were first used to explore the effect of IC and SM combinations on prognosis and the immune microenvironment in AML, and bone marrow samples from 68 AML patients from our clinical center (GZFPH) was further used to validate the findings. High expression of CD276, Bcl2-associated athanogene 3 (BAG3), and SRC was associated with poor overall survival (OS) of AML patients. CD276/BAG3/SRC combination, standard European Leukemia Net (ELN) risk stratification, age, and French-American-British (FAB) subtype were used to construct a nomogram model. Interestingly, the new risk stratification derived from the nomogram was better than the standard ELN risk stratification in predicting the prognosis for AML. A weighted combination of CD276 and BAG3/SRC positively corrected with TP53 mutation, p53 pathway, CD8+ T cells, activated memory CD4+ T cells, T-cell senescence score, and Tumor Immune Dysfunction and Exclusion (TIDE) score estimated by T-cell dysfunction. High expression of ICs and SMs was associated with poor OS of AML patients. The co-expression patterns of CD276 and BAG3/SRC might be potential biomarkers for risk stratification and designing combinational immuno-targeted therapy in AML.Key MessagesHigh expression of CD276, BAG3, and SRC was associated with poor overall survival of AML patients.The co-expression patterns of CD276 and BAG3/SRC might be potential biomarkers for risk stratification and designing combinational immuno-targeted therapy in AML. High expression of CD276, BAG3, and SRC was associated with poor overall survival of AML patients. The co-expression patterns of CD276 and BAG3/SRC might be potential biomarkers for risk stratification and designing combinational immuno-targeted therapy in AML.
Correspondence Between DGP Brane Cosmology and 5D Ricci-flat Cosmology
Creators: name: Ping, Yongli
name: Xu, Lixin
name: Liu, Hongya
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss the correspondence between the DGP brane cosmology and 5D Ricci-flat cosmology by letting their metrics equal each other. By this correspondence, a specific geometrical property of the arbitrary integral constant I in DGP metric is given and it is related to the curvature of 5D bulk. At the same time, the relation of arbitrary functions $μ$ and $ν$ in a class of Ricci-flat solutions is obtained from DGP brane metric.
description: 8 pages, 1 figure, accepted by MPLA, added reference
Studio di modelli matematici per la verifica e la progettazione di impianti di digestione anaerobica su scala di laboratorio e industriale
Mathematical modelling of Anaerobic Digestion plants on bench and industrial scale
Creators: name: Bucchi, Giacomo <1986>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: ING-IND/25 Impianti chimici

description: Il lavoro di Dottorato si è incentrato con successo sullo studio della possibilità di applicare il modello ADM1 per la descrizione e verifica di impianti industriali di digestione anaerobica. Dai dati sperimentali il modello e l'implementazione in software di analisi numerica si sono rivelati strumenti efficaci. Il software sviluppato è stato utilizzato come strumento di progettazione di impianti alimentati con biomasse innovative, analizzate con metodiche biochimiche (BMP) in scala di laboratorio. Lo studio è stato corredato con lo studio di fattibilità di un impianto reale con verifica di ottimo economico.
description: This work of thesis succesfully studied the feasibility of ADM1 application to Anaerobic Digestion industrial biogas plant description. The model and its implementation in numerical analysis software is an efficient tool. The software was applied to new substrates tested in bench scale tests (BMP tests) to design innovative AD bioreactors on industrial scale. This study also features the feasibility study of an existing industrial biogas plant, completed with the economic study (business plan).
Gaussian Process Regression for foreground removal in HI intensity mapping experiments
Creators: name: Soares, Paula S.
name: Watkinson, Catherine A.
name: Cunnington, Steven
name: Pourtsidou, Alkistis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We apply for the first time Gaussian Process Regression (GPR) as a foreground removal technique in the context of single-dish, low redshift HI intensity mapping, and present an open-source Python toolkit for doing so. We use MeerKAT and SKA1-MID-like simulations of 21cm foregrounds (including polarisation leakage), HI cosmological signal and instrumental noise. We find that it is possible to use GPR as a foreground removal technique in this context, and that it is better suited in some cases to recover the HI power spectrum than Principal Component Analysis (PCA), especially on small scales. GPR is especially good at recovering the radial power spectrum, outperforming PCA when considering the full bandwidth of our data. Both methods are worse at recovering the transverse power spectrum, since they rely on frequency-only covariance information. When halving our data along frequency, we find that GPR performs better in the low frequency range, where foregrounds are brighter. It performs worse than PCA when frequency channels are missing, to emulate RFI flagging. We conclude that GPR is an excellent foreground removal option for the case of single-dish, low redshift HI intensity mapping in the absence of missing frequency channels. Our Python toolkit gpr4im and the data used in this analysis are publicly available on GitHub.
description: 19 pages, 1 table, 13 figures, main results in figures 6 and 9, code and data available at https://github.com/paulassoares/gpr4im. Version accepted by MNRAS
Zipf law in the popularity distribution of chess openings
Creators: name: Blasius, B.
name: Toenjes, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We perform a quantitative analysis of extensive chess databases and show that the frequencies of opening moves are distributed according to a power-law with an exponent that increases linearly with the game depth, whereas the pooled distribution of all opening weights follows Zipf's law with universal exponent. We propose a simple stochastic process that is able to capture the observed playing statistics and show that the Zipf law arises from the self-similar nature of the game tree of chess. Thus, in the case of hierarchical fragmentation the scaling is truly universal and independent of a particular generating mechanism. Our findings are of relevance in general processes with composite decisions.
description: 5 pages, 4 figures
Leptusa (Dysleptusa) carolinensis Pace 1989
Creators: name: Webster, Reginald
name: Klimaszewski, Jan
name: Pelletier, Georges
name: Savard, Karine
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Leptusa
Leptusa carolinensis

description: Leptusa (Dysleptusa) carolinensis Pace, 1989 Fig 29, Map 29 New Records. CANADA, New Brunswick, Carleton Co., “ Bell Forest ”, 46.2200°N, 67.7231°W, 6.V.2006 (2 ♁, 5 ♀, RWC); same locality and date (1 ♁, RWC). Queens Co., near Queenstown, 45.6904°N, 66.1455°W, 13.V.2008 (1 ♀, RWC). Saint John Co., Musquash, 45.1837°N, 66.3376°W, 7.V.2006 (1 ♁, RWC). Bionomic Notes. In New Brunswick, L. carolinensis was found in hardwood forests under bark of American beech (Fagus grandifolia Ehrh.) logs, under bark of sugar maple (Acer saccharum Marsh.), and in fleshy polypore (bracket) fungi on dead stand- Map 29. Collection localities in New Brunswick, Canada of Leptusa carolinensis. ing beech tree. One individual was collected from marsh litter on the inland margin of a salt marsh. Th is data suggests that L. carolinensis is associated with subcortical microhabitats and other microhabitats associated with trees. Elsewhere, this species was captured in Lindgren funnel traps, pitfall traps, and flight intercept traps in sugar maple, red spruce (Picea rubens Sarg.), black spruce forests and red spruce/eastern hemlock (Tsuga canadensis (L.) Carr.) forests of various ages (Klimaszewski et al. 2004). In New Brunswick, all adults were captured in May. Collection method: hand searching subcortical habitats, sifting. Distribution in Canada and Alaska. QC, NB, NS (Pace 1989; Klimaszewski et al. 2004; Gouix and Klimaszewski 2007).
description: Published as part of Webster, Reginald, Klimaszewski, Jan, Pelletier, Georges & Savard, Karine, 2009, New Staphylinidae (Coleoptera) records with new collection data from New Brunswick, Canada. I. Aleocharinae, pp. 171-248 in ZooKeys 22 (22) on pages 207-208, DOI: 10.3897/zookeys.22.152, http://zenodo.org/record/576537
description: {"references": ["Pace R (1989) Monografia del genere Leptusa Kraatz (Coleoptera, Staphylinidae). Memorie Del Museo Civico Di Storia Naturale Di Verona (II Serie) Sezione Scienze Della Vita (A: Biologica) N. 8: 1 - 307.", "Gouix N, Klimaszewski J (2007) Catalogue of Aleocharine Rove Beetles of Canada and Alaska (Coleoptera, Staphylinidae, Aleocharinae). Pensoft Publishers, Sofia-Moscow, 165 pp."]}
The beliefs and practices of early Chʻüan-chen Taoism
Creators: name: Eskildsen, Stephen Edward
Publisher: name: University of British Columbia
Year: 2010

description: The following is an in depth analysis of the beliefs and practices of the Ch'uan-chen sect of religious Taoism during its early years (spanning roughly from 1160 to 1220 A.D.) under its founder, Wang Ch'ung-yang, and his direct disciples, Ma Tan-yang, T'an Ch'ang-chen, Liu Chang-sheng, Ch'iu Ch'ang-ch'un, Wang Yii-yang, Hao Kuang-ning and Sun Ch'ing-ching (who are commonly referred to as the Seven Perfected). In undergoing this analysis, an attempt is made to clear up the many serious misconceptions of modern scholarship while bringing to light various vital aspects of the sect that have been largely ignored. The essential point that is made is that contrary to the widely held notion that the Ch'uan-chen sect was a highly syncretic movement (some scholars have maintained that it was originally not actually a sect of religious Taoism) that tried to reform religious Taoism by doing away with its various "magical" and "superstitious" elements (physiological techniques for long life, belief in miracles performed by Taoist holy men, Taoist rituals, exorcistic healing etc.), the Ch'uan-chen sect primarily emphasized various beliefs and practices that were unique to the Taoist religion, including those that have tended to be considered "magical" or "superstitious". While it is acknowledged that the Ch'uan-chen sect was indeed highly syncretic in spirit and that its central doctrines (such as the definition of "Immortal-hood" and the methods of "Perfection Cultivation" which are undergone in order to attain it) had come to differ considerably from those of religious Taoism in its earliest years, it is pointed out that these changes had all taken place within religious Taoism prior to the Ch'uan-chen sect and were the result of a long, evolutionary process that had been going on for centuries. Out of discretion for the lack of thorough knowledge concerning the various religious Taoist movements that preceeded the Ch'uan-chen sect, no definite statement is made concerning what the unique contribution of the Ch'uan-chen sect towards the doctrinal development of religious Taoism may have been. However, the suggestion is made that the sect may have emphasized the importance of intense ascetic training more than any preceeding religious Taoist movement.
Dynamics of meromorphic functions with direct or logarithmic singularities
Creators: name: Bergweiler, Walter
name: Rippon, Philip J.
name: Stallard, Gwyneth M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Complex Variables (math.CV)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37F10; 30D05; 30D20; 30D30; 34M05

description: We show that if a meromorphic function has a direct singularity over infinity, then the escaping set has an unbounded component and the intersection of the escaping set with the Julia set contains continua. This intersection has an unbounded component if and only if the function has no Baker wandering domains. We also give estimates of the Hausdorff dimension and the upper box dimension of the Julia set of a meromorphic function with a logarithmic singularity over infinity. The above theorems are deduced from more general results concerning functions which have "direct or logarithmic tracts", but which need not be meromorphic in the plane. These results are obtained by using a generalization of Wiman-Valiron theory. The method is also applied to complex differential equations.
description: 29 pages, 2 figures; v2: some overall revision, with comments and references added; to appear in Proc. London Math. Soc
Neotobia alberta Ashe 1992
Creators: name: Webster, Reginald
name: Klimaszewski, Jan
name: Pelletier, Georges
name: Savard, Karine
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Neotobia
Neotobia alberta

description: Neotobia alberta Ashe, 1992 Fig 30, Map 30 New Records. CANADA, New Brunswick, Carleton Co., Meduxnekeag River Valley Nature Preserve, 46.1940°N, 67.6800°W, 3.VII.2006 (1 sex undetermined, RWC); Meduxnekeag River Valley Nature Preserve, 46.1907°N, 67.6740°W, 8.VIII.2006 (1 ♁, RWC); same locality data, 13.VIII.2006 (2 ♀, RWC). Sunbury Co., Acadia Research Forest, 46.0188°N, 66.3765°W, 17.VIII.2007 (1 ♀, AFC). York Co., Charters Settlement, 45.8340°N, 66.7450°W, 20.V.2007 (1 ♁, RWC). Map 30. Collection localities in New Brunswick, Canada of Neotobia alberta. Bionomic Notes. Neotobia alberta was collected from various fungi growing on dead standing trees and logs in mixed forests. Adults were found in slightly dried Pleurotus mushrooms, polypore fungi in early stages of decay, and in decaying Hapalopilus nidulans (Fr.) Karst. (a fleshy polypore fungus). Adults were collected in May, July, and August. Collection method: sifting. Distribution in Canada and Alaska. AB, MB, ON, QC, NB (Ashe 1992; Gouix and Klimaszewski 2007).
description: Published as part of Webster, Reginald, Klimaszewski, Jan, Pelletier, Georges & Savard, Karine, 2009, New Staphylinidae (Coleoptera) records with new collection data from New Brunswick, Canada. I. Aleocharinae, pp. 171-248 in ZooKeys 22 (22) on pages 208-209, DOI: 10.3897/zookeys.22.152, http://zenodo.org/record/576537
description: {"references": ["Ashe JS (1992) Phylogeny and revision of genera of the subtribe Bolitocharina (Coleoptera: Staphylinidae: Aleocharinae). Th e University of Kansas Science Bulletin 54: 335 - 406.", "Gouix N, Klimaszewski J (2007) Catalogue of Aleocharine Rove Beetles of Canada and Alaska (Coleoptera, Staphylinidae, Aleocharinae). Pensoft Publishers, Sofia-Moscow, 165 pp."]}
Phymatura blanchardi
Creators: name: Webster, Reginald
name: Klimaszewski, Jan
name: Pelletier, Georges
name: Savard, Karine
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Phymatura
Phymatura blanchardi

description: Phymatura blanchardi (Casey, 1894) Fig 31, Map 31 New Records. CANADA, New Brunswick, Queens Co., Grand Lake, near Scotchtown, 45.8762°N, 66.1816°W, 19.IX.2006 (4 ♁, 4 ♀, RWC). Sunbury Co., Portobello Creek NWA, 45.8990°N, 66.4200°W, 28.VI.2004 (1 ♁, RWC). Bionomic Notes. Adults were collected from inside a decayed log covered with gilled mushrooms and polypore fungi. One individual was collected from under loose bark. Some of the individuals collected in late September were teneral, suggesting that this species probably overwinters as an adult. Majka and Klimaszewski (2008b) mentioned that this species was associated with fungi. Adults Map 3Į. Collection localities in New Brunswick, Canada of Phymatura blanchardi. were collected in June and September. Collection method: sifting, hand searching subcortical habitat. Distribution in Canada and Alaska. AB, NB (Casey 1894; Ashe 1992; Majka and Klimaszewski 2008b). Phymatura blanchardi was recorded for the first time for Canada from a single specimen collected in Alberta (Lac La Biche) in a modified window trap (Majka and Klimaszewski 2008b). Th e presence of this species in New Brunswick suggests a much wider distribution in Canada.
description: Published as part of Webster, Reginald, Klimaszewski, Jan, Pelletier, Georges & Savard, Karine, 2009, New Staphylinidae (Coleoptera) records with new collection data from New Brunswick, Canada. I. Aleocharinae, pp. 171-248 in ZooKeys 22 (22) on pages 209-210, DOI: 10.3897/zookeys.22.152, http://zenodo.org/record/576537
description: {"references": ["Casey TL (1894) Coleopterological notices. V. Annals of the New York Academy of Sciences 7: 281 - 606.", "Majka CG, Klimaszewski J (2008 b) New records of Canadian Aleocharinae (Coleoptera: Staphylinidae). ZooKeys 2: 85 - 114.", "Ashe JS (1992) Phylogeny and revision of genera of the subtribe Bolitocharina (Coleoptera: Staphylinidae: Aleocharinae). Th e University of Kansas Science Bulletin 54: 335 - 406."]}
Moments of parton distribution functions of any order from lattice QCD
Creators: name: Shindler, Andrea
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We describe a procedure to determine moments of parton distribution functions of any order in lattice quantum chromodynamics (QCD). The procedure is based on the gradient flow for fermion and gauge fields. The flowed matrix elements of twist-2 operators renormalize multiplicatively, and the matching with the physical matrix elements can be obtained using continuum symmetries and the irreducible representations of Euclidean 4-dimensional rotations. We calculate the matching coefficients at one-loop in perturbation theory for moments of any order in the flavor nonsinglet case. We also give specific examples of operators that could be used in lattice QCD computations. It turns out that it is possible to choose operators with identical Lorentz indices and still have a multiplicative matching. One can thus use twist-2 operators exclusively with temporal indices, thus substantially improving the signal-to-noise ratio in the computation of the hadronic matrix elements.
description: 10 pages, 2 figures - Version matches published version
Resolvent Trace Formula and Determinants of $n$ Laplacians on Orbifold Riemann Surfaces
Creators: name: Teo, Lee-Peng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Complex Variables (math.CV)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: For $n$ a nonnegative integer, we consider the $n$-Laplacian $Δ_n$ acting on the space of $n$-differentials on a confinite Riemann surface $X$ which has ramification points. The trace formula for the resolvent kernel is developed along the line à la Selberg. Using the trace formula, we compute the regularized determinant of $Δ_n+s(s+2n-1)$, from which we deduce the regularized determinant of $Δ_n$, denoted by $\det\!'Δ_n$. Taking into account the contribution from the absolutely continuous spectrum, $\det\!'Δ_n$ is equal to a constant $\mathcal{C}_n$ times $Z(n)$ when $n\geq 2$. Here $Z(s)$ is the Selberg zeta function of $X$. When $n=0$ or $n=1$, $Z(n)$ is replaced by the leading coefficient of the Taylor expansion of $Z(s)$ around $s=0$ and $s=1$ respectively. The constants $\mathcal{C}_n$ are calculated explicitly. They depend on the genus, the number of cusps, as well as the ramification indices, but is independent of the moduli parameters.
A Unified Power-Setpoint Tracking Algorithm for Utility-Scale PV Systems with Power Reserves and Fast Frequency Response Capabilities
Creators: name: Paduani, Victor
name: Yu, Hui
name: Xu, Bei
name: Lu, Ning
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents a fast power-setpoint tracking algorithm to enable utility-scale photovoltaic (PV) systems to provide high quality grid services such as power reserves and fast frequency response. The algorithm unites maximum power-point estimation (MPPE) with flexible power-point tracking (FPPT) control to improve the performance of both algorithms, achieving fast and accurate PV power-setpoint tracking even under rapid solar irradiance changes. The MPPE is developed using a real-time, nonlinear curve-fitting approach based on the Levenberg-Marquardt algorithm. A modified adaptive FPPT based on the Perturb and Observe technique is developed for the power-setpoint tracking. By using MPPE to decouple the impact of irradiance changes on the measured PV output power, we develop a fast convergence technique for tracking power-reference changes within three FPPT iterations. Furthermore, to limit the maximum output power ripple, a new design is introduced for the steady-state voltage step size of the adaptive FPPT. The proposed algorithm is implemented on a testbed consisting of a 500 kVA three-phase, single-stage, utility-scale PV system on the OPAL-RT eMEGASIM platform. Results show that the proposed method outperforms the state-of-the-art.
description: Accepted by IEEE Transactions on Sustainable Energy
Impact of the continuum Coulomb interaction in quantum-orbit-based treatments of high-order above-threshold ionization
Creators: name: Rook, T.
name: Habibović, D.
name: Rodriguez, L. Cruz
name: Milošević, D. B.
name: Faria, C. Figueira de Morisson
Publisher: name: arXiv
Year: 2023
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We perform a systematic comparison between photoelectron momentum distributions computed with the rescattered-quantum orbit strong-field approximation (RQSFA) and the Coulomb-quantum orbit strong-field approximation (CQSFA). We exclude direct, hybrid, and multiple scattered CQSFA trajectories, and focus on the contributions of trajectories that undergo a single act of rescattering. For this orbit subset, one may establish a one-to-one correspondence between the RQSFA and CQSFA contributions for backscattered and forward-scattered trajectory pairs. We assess the influence of the Coulomb potential on the ionization and rescattering times of specific trajectory pairs, kinematic constraints determined by rescattering, and quantum interference between specific pairs of trajectories. We analyze how the Coulomb potential alters their ionization and return times, and their interference in photoelectron momentum distributions. We show that Coulomb effects are not significant for high or medium photoelectron energies and shorter orbits, while, for lower momentum ranges or longer electron excursion times in the continuum, the residual Coulomb potential is more important. We also assess the agreement of both theories for different field parameters, and show that it improves with the increase of the wavelength.
description: 18 pages, 10 figures; accepted for publication in Physical Review A
Higgs to charm quarks in vector boson fusion plus a photon
Creators: name: Carlson, Ben
name: Han, Tao
name: Leung, Sze Ching Iris
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Experimentally probing the charm-Yukawa coupling in the LHC experiments is important, but very challenging due to an enormous QCD background. We study a new channel that can be used to search for the Higgs decay $H\to c\bar c$, using the vector boson fusion (VBF) mechanism with an associated photon. In addition to suppressing the QCD background, the photon gives an effective trigger handle. We discuss the trigger implications of this final state that can be utilized in ATLAS and CMS. We propose a novel search strategy for $H\to c\bar c$ in association with VBF jets and a photon, where we find a projected sensitivity of about 13 times the SM charm-Yukawa coupling at 95$\%$ $\text{CL}_s$ at High Luminosity LHC (HL-LHC). Our result is comparable and complementary to existing projections at the HL-LHC. We also discuss the implications of increasing the center of mass collision energy to 30 TeV and 100 TeV.
description: 11 pages, 6 figures, 6 tables