cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Comparative secondary metabolites profiling and biological activities of aerial, stem and root parts of Salvadora oleoides decne (Salvadoraceae)
Creators: name: Hammad Saleem
name: Ahmad, Irshad
name: Gokhan Zengin
name: Mahomoodally, Fawzi M.
name: Kashif-Ur- Rehman Khan
name: Ahsan, Hafiz Muhammad
name: Syafiq Asnawi Zainal Abidin
name: Nafees Ahemad
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology

description: In this study, different parts (aerial, stem and root) of Salvadora oleoides Decne were investigated in order to explore their phytochemical composition and biological potential. The bioactive contents were evaluated by conventional spectrophotometric methods. Additionally, the secondary metabolite compounds were identified by UHPLC-MS analysis. Biological potential was evaluated by determining antioxidant (DPPH, FRAP, and Phosphomolybdenum) and enzyme inhibitory (butrylcholinesterase and lipoxygenase) effects. Higher total bioactive contents were found in methanolic extracts which tend to correlate with higher radical scavenging and reducing potential of these extracts. LC/MS spectrum revealed the presence of 16 different secondary metabolites belonging to terpene, glucoside and sesquiterpenoid dervivatives. Glucocleomin and emotin A were the main compounds present in all three parts. The strongest butrylcholinesterase and lipoxygenase inhibitory activity was observed for root and stem DCM extracts. Demonstrated biological potential of S. oleoides plant can trace a new road map for developing newly designed bioactive pharmaceuticals.
Impact of filter cigarette smoking on lung cancer histology
Creators: name: Stellman, Steven D.
name: Muscat, Joshua E.
name: Hoffmann, Dietrich
name: Wynder, Ernst L.
Publisher: name: Columbia University
Year: 1997
Subjects: Epidemiology
Oncology

description: Background. The rates of lung adenocarcinoma cancer have risen more rapidly than the rates of lung squamous cell cancer over the past 2 decades.

Methods. A case–control study was carried out to assess the impact of long-term filter cigarette smoking on the risk of squamous cell carcinoma (SCC) and adenocarcinoma (AC) of the lung.

Results. Odds ratios for SCC among subjects who had smoked only filter cigarettes were reduced relative to lifetime nonfilter cigarette smokers by 30% for men and by 60% for women, but no risk reduction was observed for AC of the lung.

Conclusion. The predominance of AC over SCC may be due in part to the fact that smokers of very low yield cigarettes tend to compensate for the lower nicotine levels by inhaling more deeply and frequently, leading to greater exposure of the peripheral lung to the carcinogens in tobacco smoke, and in part to the increased concentration of nitrosamines that preferentially produce AC in laboratory animals.
Stability of the Superfluid State in Three-Component Fermionic Optical Lattice Systems
Creators: name: Okanami, Yuki
name: Takemori, Nayuta
name: Koga, Akihisa
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Three-component fermionic optical lattice systems are investigated in dynamical mean-field theory for the Hubbard model. Solving the effective impurity model by means of continuous-time quantum Monte Carlo simulations in the Nambu formalism, we find that the $s$-wave superfluid state proposed recently is indeed stabilized in the repulsively interacting case and appears along the first-order phase boundary between the metallic and paired Mott states in the paramagnetic system. The BCS-BEC crossover in the three-component fermionic system is also addressed.
description: 8 pages, 10 figures
Managing Requirement Elicitation Issues Using Step-Wise Refinement Model
Creators: name: G, Nikita Nahar
name: wora, Pujita K
name: Kumaresh, Sakthi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: In this paper, a Step-wise Refinement model is proposed to elicit requirements in a more effective manner.
description: 7 pages, 5 figures, 1 table
Hybrid Quantum Classical Simulations
Creators: name: Willsch, Dennis
name: Jattana, Manpreet
name: Willsch, Madita
name: Schulz, Sebastian
name: Jin, Fengping
name: De Raedt, Hans
name: Michielsen, Kristel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We report on two major hybrid applications of quantum computing, namely, the quantum approximate optimisation algorithm (QAOA) and the variational quantum eigensolver (VQE). Both are hybrid quantum classical algorithms as they require incremental communication between a classical central processing unit and a quantum processing unit to solve a problem. We find that the QAOA scales much better to larger problems than random guessing, but requires significant computational resources. In contrast, a coarsely discretised version of quantum annealing called approximate quantum annealing (AQA) can reach the same promising scaling behaviour using much less computational resources. For the VQE, we find reasonable results in approximating the ground state energy of the Heisenberg model when suitable choices of initial states and parameters are used. Our design and implementation of a general quasi-dynamical evolution further improves these results.
description: This article is a book contribution. The book is freely available at http://hdl.handle.net/2128/31840
Bioactive contents, In vitro antiradical, antimicrobial and cytotoxic properties of rhubarb (Rheum ribes L.) extracts
Creators: name: Keser, Serhat
name: Keser, Fatma
name: Karatepe, Mustafa
name: Kaygili, Omer
name: Tekin, Suat
name: Turkoglu, Ismail
name: Demir, Ersin
name: Okkes Yilmaz
name: Kirbag, Sevda
name: Sandal, Suleyman
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Inorganic Chemistry
subject: Plant Biology

description: Rheum ribes L. (rhubarb) is belonging to Polygonaceae, and its roots and fresh shoots are consumed as vegetable in Turkey. This plant is considered to be one of the most important pharmaceutical raw materials in Middle East. In this study, the antiradical, antimicrobial, cytotoxic and bioactive properties of water, ethanol, and methanol extracts of R. ribes stems were determined. R. ribes stems water, ethanol and methanol extracts are better scavenged ABTS•+ (99.27, 99.91, and 99.88%), DPPH• (83.11, 81.42, and 83.26%), and OH• radicals (93.49, 94.21, 95.86%) than standard antioxidant BHA (95.32, 80.49, and 93.78%). Stems of R. ribes abundantly include bioactive compounds, dominated by rutin, catechin, caffeic acid, ferulic acid, α-tocopherol and vitamin D. These extracts show effective cytotoxic properties against PC-3, A2780, HCT-116 and MCF-7 cancer cell lines at 24h. It is found that R. ribes contain high amount important bioactive contents, and has effective antiradical and cytotoxic properties.
Spinning Janus doublets driven in uniform AC electric fields
Creators: name: Boymelgreen, Alicia
name: Yossifon, Gilad
name: Park, Sinwook
name: Miloh, Touvia
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We provide an experimental proof-of-concept for a robust, continuously rotating microstructure - consisting of two metallodielectric (gold-polystyrene)Janus particles rigidly attached to each other - which is driven in uniform ac fields by asymmetric induced-charge electroosmosis. The pairs (doublets) are stabilized on the substrate surface which is parallel to the plane of view and normal to the direction of the applied electric field. We find that the radius of orbit and angular velocity of the pair are predominantly dependent on the relative orientations of the interfaces between the metallic and dielectric hemispheres and that the electrohydrodynamic particle-particle interactions are small. Additionally, we verify that both the angular and linear velocities of the pair are proportional to the square of the applied field which is consistent with the theory for non-linear electrokinetics. A simple kinematic rigid body model is used to predict the paths and double velocities (angular and linear) based on their relative orientations with good agreement.
Definition of the Pnictogen Bond: A Perspective
Creators: name: Varadwaj, Arpita
name: Varadwaj, Pradeep R.
name: Marques, Helder M.
name: Yamashita, Koichi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: This article proposes a definition for the term pnictogen bond and lists its donors, acceptors, and characteristic features. These may be invoked to identify this specific subset of the inter- and intra-molecular interactions formed by elements of Group 15 which possess an electrophilic site in a molecular entity.
description: 15 pages
Effect of essential oil from Ageratum fastigiatum on beta-integrin (CD18) expression on human lymphocytes stimulated with phorbol myristate acetate in vitro
Creators: name: Souza, Bárbara E.
name: Ottoni, Marcelo H. F.
name: Alvarenga, Priscila G. M. De
name: Meireles, Agnes Batista
name: Silveira, João V. W.
name: Almeida, Valéria Gomes
name: Michaelle G. Dos Santos
name: Libardo Andrés González-Torres
name: Cristiane F. Fuzer Grael
name: Brito-Melo, Gustavo Eustáquio Alvim
name: Bethânia A. Avelar-Freitas
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Agareratum fastigiatum is a Brazilian medicinal plant used as anti-inflammaroty and for wound healing by the folk medicine. In vitro and in vivo studies involving A. fastigiatum essential oil (EOAF) showed indications of anti-inflammatory activity, however, its effect on membrane integrins involved on cell migration is still unclear. Hence, it was evaluated in the present study the effect of EOAF on CD18 frequency on human lymphocytes. By using gas chromatography/mass spectrometry it was identified 9 compounds on EOAF: α-pinene; β-pinene; β-myrcene; d-limonene; β-ocimene; sesquiterpenes; α-copaene; 4,8-β-epóxi-caryophyllene; germacrene and bicyclogermacrene. On in vitro tests, 6.25 × 10−3 and 12.5 × 10−3 µL/mL EOAF reduced CD18 frequency on phorbol-12-myristate-13-acetate (PMA)-stimulated lymphocytes. Such cells were obtained from peripheral blood of healthy volunteers, and were treated or not with EOAF. They were stained with fluorescent anti-CD18 monoclonal antibodies, after 24 hours incubation. Our data corroborates previous findings, indicating a possible anti-inflammatory activity of EOAF.
A Population of Fast Radio Bursts at Cosmological Distances
Creators: name: Thornton, D.
name: Stappers, B.
name: Bailes, M.
name: Barsdell, B. R.
name: Bates, S. D.
name: Bhat, N. D. R.
name: Burgay, M.
name: Burke-Spolaor, S.
name: Champion, D. J.
name: Coster, P.
name: D'Amico, N.
name: Jameson, A.
name: Johnston, S.
name: Keith, M. J.
name: Kramer, M.
name: Levin, L.
name: Milia, S.
name: Ng, C.
name: Possenti, A.
name: van Straten, W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Searches for transient astrophysical sources often reveal unexpected classes of objects that are useful physical laboratories. In a recent survey for pulsars and fast transients we have uncovered four millisecond-duration radio transients all more than 40° from the Galactic plane. The bursts' properties indicate that they are of celestial rather than terrestrial origin. Host galaxy and intergalactic medium models suggest that they have cosmological redshifts of 0.5 to 1, and distances of up to 3 gigaparsecs. No temporally coincident x- or gamma-ray signature was identified in association with the bursts. Characterization of the source population and identification of host galaxies offers an opportunity to determine the baryonic content of the Universe.
description: 20 pages, 6 figures, 2 tables. Energies in table 1 corrected from hard-copy version
Development of the ComPair gamma-ray telescope prototype
Creators: name: Shy, Daniel
name: Kierans, Carolyn
name: Cannady, Nicolas
name: Caputo, Regina
name: Griffin, Sean
name: Grove, J. Eric
name: Hays, Elizabeth
name: Kong, Emily
name: Kirschner, Nicholas
name: Liceaga-Indart, Iker
name: McEnery, Julie
name: Mitchell, John
name: Moiseev, A. A.
name: Parker, Lucas
name: Perkins, Jeremy S.
name: Phlips, Bernard
name: Sasaki, Makoto
name: Schoenwald, Adam J.
name: Sleator, Clio
name: Smith, Jacob
name: Smith, Lucas D.
name: Wasti, Sambid
name: Woolf, Richard
name: Wulf, Eric
name: Zajczyk, Anna
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: There is a growing interest in the science uniquely enabled by observations in the MeV range, particularly in light of multi-messenger astrophysics. The Compton Pair (ComPair) telescope, a prototype of the AMEGO Probe-class concept, consists of four subsystems that together detect and characterize gamma rays in the MeV regime. A double-sided strip silicon Tracker gives a precise measure of the first Compton scatter interaction and tracks pair-conversion products. A novel cadmium zinc telluride (CZT) detector with excellent position and energy resolution beneath the Tracker detects the Compton-scattered photons. A thick cesium iodide (CsI) calorimeter contains the high-energy Compton and pair events. The instrument is surrounded by a plastic anti-coincidence (ACD) detector to veto the cosmic-ray background. In this work, we will give an overview of the science motivation and a description of the prototype development and performance.
Vascular effects of a polyphenolic fraction from Oxalis pes-caprae L.: role of α-adrenergic receptors Sub-types
Creators: name: Fonseca, Diogo A.
name: Ferreira, Mónica
name: Campos, Maria Graça
name: Antunes, Pedro E.
name: Antunes, Manuel J.
name: Cotrim, Maria Dulce
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Neuroscience
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Oxalis pes-caprae L. is a plant of the Oxalidaceae family, from which several compounds have been previously identified. Recently, we showed that an Oxalis pes-caprae L. extract inhibits the vasopressor effect of noradrenaline. In this work we aimed to explore the mechanisms involved in this effect. The results confirmed that the flavonoid fraction present in the extract inhibits noradrenaline-induced contractions and that this effect is concentration-dependent. Also, a parallel shift to the right in the noradrenaline concentration-response curve was observed, suggesting a decrease in efficacy and also in potency. Together these results support the assumption that the extract could exert a non-competitive antagonism on the α-adrenergic receptors. However, experiments in the presence of competitive antagonists for α-adrenergic receptor sub-types (i.e. prazosin, yohimbine and phentolamine) showed that the effect may not be directly mediated by α-adrenergic receptors. Thus, the interaction of this extract with the adrenergic system remains to be confirmed.
Musical Platonism in Modern Culture
Creators: name: Goehring, Edmund J.
Publisher: name: Columbia University
Year: 2003
Subjects: Music

description: Not too long ago, the Atlantic Monthly, one of the better-known organs of
modern culture and thinking about it, ran a commentary on music in contemporary society by the art critic Jody Bottum. The main objective of
"The Soundtracking of America" (March 2000) is to topple music from its
present-day position of cultural supremacy. Bottum contends that music
does not deserve its place of superiority over the poetic arts, in particular,
because it is intellectually barren. Incapable of generating meaning without
help from elsewhere, music must latch on to an external, largely verbal
system of beliefs for it to have coherence or utility. Without such moorings,
music becomes a destabilizing force in society.
The desire to restore music to its old subservience to poetry, a position
it has not held for some two centuries, resonates strongly in many circles
of contemporary social/political thought, including academic ones. Not
only are Bottum's concerns related to ongoing questions about music's
place among the other arts; more broadly, they draw on a larger academic
debate about the ability of any individual discipline, not just music, to generate
its own meaning. The purpose of the present essay is to examine the
sources and implications of this modern effort to explain music through
external, non-musical standards. First, it will excavate the philosophical
roots of this anti-musical prejudice. Here, the argument will be that the
move to circumscribe music within the ambit of the verbal arts or a philosophical
system turns on a specific reading-or, more likely, a misreading-
of Platonic thought. Approaching music in this way leads both to
errors about the general nature of music and also to misinterpretations of
specific works. Second, this essay will suggest that there are other, more
compelling ways of conceiving music, including ones that grant music autonomy
from external standards without a loss of intelligibility or meaningfulness.
Investigation of phytochemical constituents of anti-leukemic herbal drugs used by the traditional healers of Purulia, Birbhum and Bankura districts of West Bengal
Creators: name: Monaj Kumar Sarkar
name: Vellingiri Vadivel
name: Mamilla R. Charan Raja
name: Santanu Kar Mahapatra
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Hematology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: In the present work, 16 different plant drugs used by traditional healers from West Bengal were screened through in vitro cell line model. Herbal drugs used by traditional tribal healers in Purulia, Birbhum and Bankura districts of West Bengal were collected and screening against acute myeloid leukemia (AML) cell line (HL-60). Among 16 plant extracts, bark of Flacourtia indica (66.67%), leaf of Madhuca longifolia (69.17%), and leaf of Prosopis cineraria (68.08%) showed better cytotoxicity results than other herbals. Further, time-dependent study showed maximum cytotoxicity of the selected herbal extracts between 36 and 48 hours of treatment in both acute and chronic myeloid leukemia (CML) cell lines (HL-60 and K562). The LC-MS/MS analysis of the selected drugs revealed the presence of picrotoxinin and 10-deacetylbaccatin from F. indica, isoorientin and hirsutrin from M. longifolia, vitexin and rhoifolin in P. cineraria.
Superfluid-Insulator transition of quantum Hall domain walls in bilayer graphene
Creators: name: Mazo, Victoria
name: Huang, Chia-Wei
name: Shimshoni, Efrat
name: Carr, Sam T.
name: Fertig, H. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider the zero-filled quantum-Hall ferromagnetic state of bilayer graphene subject to a kink-like perpendicular electric field, which generates domain walls in the electronic state and low-energy collective modes confined to move along them. In particular, it is shown that two pairs of collective helical modes are formed at opposite sides of the kink, each pair consisting of modes with identical helicities. We derive an effective field-theoretical model of these modes in terms of two weakly coupled anisotropic quantum spin-ladders, with parameters tunable through control of the electric and magnetic fields. This yields a rich phase diagram, where due to the helical nature of the modes, distinct phases possess very different charge conduction properties. Most notably, this system can potentially exhibit a transition from a superfluid to an insulating phase.
description: 4 pages + refs., 3 figures
title: Экологическая политика Китая и России: первые шаги к формированию антирискового национального поведения
Creators: name: Еремичева, Г. В.
name: Меньшикова, Г. А.
name: Яо, Пуян
Publisher: name: Реноме
Year: 2023

description: Экологические проблемы во всем мире нередко оказываются техногенными и социальными вызовами. Среди стран, где эти проблемы стоят крайне остро, находятся Россия и Китай. Об этом свидетельствуют позиции обеих стран в международных рейтингах. В статье сопоставляются направления, реализуемые Россией и Китаем в сфере экологической политики, главной задачей которой является поддержание баланса интересов всех ее акторов и выработка антирискового национального поведения. В качестве методологической основы анализа достижений китайской и российской экополитики используется теория экологической модернизации, которая позволяет системно оценить инновации, определяющие социальную составляющую в каждой стране, обозначая главное — изменение сознания каждого человека. Проведенный анализ показал, что обе страны находятся в стадии перехода к качественно новому этапу: трансформации потребительского поведения в «ответственное», отвечающее требованиям мировой экополитики. Но достигнуть показателей международных рейтингов развитых стран им пока не удается. Хотя в целом по «природным» показателям место России несколько выше, чем позиции Китая, но их значения ниже среднего уровня. В статье делается вывод, что экологические проблемы стали частью национальных политик в обеих странах, о чем свидетельствуют заметные положительные сдвиги по экологическим показателям. Однако наблюдаемая пассивность общественного контроля предопределяет недостаточность успехов обеих стран, не давая возможность их правительствам в полной мере реализовывать имеющийся потенциал. Острота проблемы настоятельно требует включения в нее государственных органов, предприятий, благотворительных организаций и всех жителей.
A precision of the sequential change point detection
Creators: name: Ochman-Gozdek, A.
name: Sarnowski, W.
name: Szajowski, K. J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistics Theory (math.ST)
subject: Probability (math.PR)
subject: Applications (stat.AP)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 60G40, Secondary: 60K99, 90D60

description: A random sequence having two segments being the homogeneous Markov processes is registered. Each segment has his own transition probability law and the length of the segment is unknown and random. The transition probabilities of each process are known and a priori distribution of the disorder moment is given. The decision maker aim is to detect the moment of the transition probabilities change. The detection of the disorder rarely is precise. The decision maker accepts some deviation in estimation of the disorder moment. In the considered model the aim is to indicate the change point with fixed, bounded error with maximal probability. The case with various precision for over and under estimation of this point is analysed. The case when the disorder does not appears with positive probability is also included. The results insignificantly extends range of application, explain the structure of optimal detector in various circumstances and shows new details of the solution construction. The motivation for this investigation is the modelling of the attacks in the node of networks. The objectives is to detect one of the attack immediately or in very short time before or after it appearance with highest probability. The problem is reformulated to optimal stopping of the observed sequences. The detailed analysis of the problem is presented to show the form of optimal decision function.
description: 8 pages. The research has been supported by grant S30103/I-18. This paper was presented in part at 59th ISI World Statistics Congress 25-30 August 2013, Hong Kong Special Administrative Region, China in the session CPS018
curriculum-vitae
Creators: name: PALACIOS, JORGE HUMBERTO ROJAS
Publisher: name: Zenodo
Year: 2022
Subjects: HOJA DE VIDA, CV

description: HOJA DE VIDA ACADEMICA , PROFESIONAL Y LABORAL
description: {"references": ["COMFAMDI, SECRETARIA DISTRITAL DE SALUD DE CALI, HOSPITAL DE SAN JUAN DE DIOS"]}
Four families of Weyl group orbit functions of B_3 and C_3
Creators: name: Háková, Lenka
name: Hrivnák, Jiří
name: Patera, Jiří
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The properties of the four families of special functions of three real variables, called here C-, S-, S^s- and S^l-functions, are studied. The S^s- and S^l-functions are considered in all details required for their exploitation in Fourier expansions of digital data, sampled on finite fragment of lattices of any density and of the 3D symmetry imposed by the weight lattices of B_3 and C_3 simple Lie algebras/groups. The continuous interpolations, which are induced by the discrete expansions, are exemplified and compared for some model functions.
description: 17 pages, 6 figures
Local Maxima of Quadratic Boolean Functions
Creators: name: Spink, Hunter
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: Primary: 06E30 Boolean Functions, Secondary: 05C65 Hypergraphs

description: How many strict local maxima can a real quadratic function on $\{0,1\}^n$ have? Holzman conjectured a maximum of $n \choose \lfloor n/2 \rfloor$. The aim of this paper is to prove this conjecture. Our approach is via a generalization of Sperner's theorem that may be of independent interest.
description: 6 pages, 1 figure
Moving forward in global-change ecology: capitalizing on natural variability
Creators: name: Ibáñez, Ines
name: Gornish, Elise S.
name: Buckley, Lauren
name: Debinski, Diane M.
name: Hellmann, Jessica
name: Helmuth, Brian
name: HilleRisLambers, Janneke
name: Miller-Rushing, Abraham J.
name: Latimer, Andrew M.
name: Uriarte, Maria
Publisher: name: Columbia University
Year: 2013
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Climatic changes

description: Natural resources managers are being asked to follow practices that accommodate for the impact of climate change on the ecosystems they manage, while global-ecosystems modelers aim to forecast future responses under different climate scenarios. However, the lack of scientific knowledge about short-term ecosystem responses to climate change has made it difficult to define set conservation practices or to realistically inform ecosystem models. Until recently, the main goal for ecologists was to study the composition and structure of communities and their implications for ecosystem function, but due to the probable magnitude and irreversibility of climate-change effects (species extinctions and loss of ecosystem function), a shorter term focus on responses of ecosystems to climate change is needed. We highlight several underutilized approaches for studying the ecological consequences of climate change that capitalize on the natural variability of the climate system at different temporal and spatial scales. For example, studying organismal responses to extreme climatic events can inform about the resilience of populations to global warming and contribute to the assessment of local extinctions. Translocation experiments and gene expression are particular useful to quantitate a species' acclimation potential to global warming. And studies along environmental gradients can guide habitat restoration and protection programs by identifying vulnerable species and sites. These approaches identify the processes and mechanisms underlying species acclimation to changing conditions, combine different analytical approaches, and can be used to improve forecasts of the short-term impacts of climate change and thus inform conservation practices and ecosystem models in a meaningful way.
Improving Australia’s flood record for planning purposes – can we do better?
Creators: name: Allen, KJ
name: Hope, P
name: Lam, D
name: Brown, JR
name: Wasson, RJ
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Molecular Biology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified

description: Extreme rainfall is projected to increase with climate change, but the impact of climate change on floods is uncertain. Infrastructure design based on information available from short gauged time series (typically ~30 – 80 years) may not take account of the full range of possible flood events, or be suitable for identifying non-stationarity. Australian palaeoflood and palaeo-hydroclimate records drawn from a wide variety of natural archives and documentary sources suggest that Australia has been subjected to larger flood events in the past; a pluvial period for eastern Australia in the eighteenth Century is particularly note-worthy. If the current infrastructure is inadequate for past floods, it is unlikely it will adequately mitigate future floods. We discuss how improved awareness, and incorporation, of palaeoflood records in risk estimates could help guide infrastructure planning and design, flood event prediction and inform flood mitigation policy. This is particularly relevant for Australia with its notoriously variable hydroclimate.
Lawsonia inermis L. leaves aqueous extract as a natural antioxidant and antibacterial product
Creators: name: Pour, Amin Pasandi
name: Farahbakhsh, Hassan
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: This study was carried out to investigate the biomedicinal potential of aqueous extract (1.25 and 2.5%) of three henna ecotypes (Shahdad, Roodbar and Bam) against Two types of Gram positive and negative bacteria, Staphylococcus aureus (ATCC 25923), Streptococcus agalactiae (ATCC 29933), Bacillus cereus (ATCC 14579), Corynebacterium pseudotuberculosis (ATCC 19410), Klebsiella pneumonia (ATCC 700603), Escherichia coli (ATCC 25922) and Salmonella enterica serovar typhi (ATCC 19430). Henna extract prevent the growth of bacteria in a dose dependent manner. The species of K. pneumonia and B. cereus showed higher resistant to henna aqueous extract compared with other bacteria species. Leaves aqueous extract of Shahdad ecotype had the highest antioxidant activity compared with those of the other ecotypes. The highest amount of 2-hydroxy-1,4-naphthoquinone as an antibacterial compound was obtained in Bam ecotype. The results also implies that other phytochemical compounds may have contributed in antibacterial and antioxidant activity of henna and thus further study needs to be done to explore them.
The Unexpected 2012 Draconid Meteor Storm
Creators: name: Ye, Quanzhi
name: Wiegert, Paul A.
name: Brown, Peter G.
name: Campbell-Brown, Margaret D.
name: Weryk, Robert J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: An unexpected intense outburst of the Draconid meteor shower was detected by the Canadian Meteor Orbit Radar (CMOR) on October 8, 2012. The peak flux occurred at ~16:40 UT on October 8 with a maximum of 2.4 +/- 0.3 hr-1 km-2 (appropriate to meteoroid mass larger than 10-7 kg), equivalent to a ZHRmax = 9000 +/- 1000 using 5-minute intervals, using a mass distribution index of s = 1.88 +/- 0.01 as determined from the amplitude distribution of underdense Draconid echoes. This makes the out- burst among the strongest Draconid returns since 1946 and the highest flux shower since the 1966 Leonid meteor storm, assuming a constant power-law distribution holds from radar to visual meteoroid sizes. The weighted mean geocentric radiant in the time interval of 15-19h UT, Oct 8, 2012 was αg = 262.4 +/- 0.1 deg, δg = 55.7 +/- 0.1 deg (epoch J2000.0). Visual observers also reported increased activity around the peak time, but with a much lower rate (ZHR 200), suggesting that the magnitude-cumulative num- ber relationship is not a simple power-law. Ablation modeling of the observed meteors as a population does not yield a unique solution for the grain size and distribution of Draconid meteoroids, but is consistent with a typical Draconid meteoroid of mtotal between 10-6 to 10-4 kg being composed of 10 - 100 grains. Dynamical simulations indicate that the outburst was caused by dust particles released during the 1966 per- ihelion passage of the parent comet, 21P/Giacobini-Zinner, although there are dis- crepancies between the modelled and observed timing of the encounter, presumably caused by approaches of the comet to Jupiter during 1966-1972. Based on the results of our dynamical simulation, we predict possible increased activity of the Draconid meteor shower in 2018, 2019, 2021 and 2025.
description: MNRAS in press
Sextans' cold substructures as a dynamical judge: Core, Cusp or MOND?
Creators: name: Lora, V.
name: Grebel, E. K.
name: Sanchez-Salcedo, F. J.
name: Just, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The cold dark matter model predicts cuspy dark matter halos. However, it has been found that, in some low-mass galaxies, cored dark halos provide a better description of their internal dynamics. Here we give constraints on the dark halo profile in the Sextans dwarf spheroidal galaxy by studying the longevity of two cold kinematic substructures detected in this galaxy. We perform N-body simulations of a stellar clump in the Sextans dwarf galaxy, including a live dark matter halo and the main stellar component. We find that, if the dark halo is cuspy, stellar clumps orbiting with semi-major axis ~400 pc are disrupted in ~5 Gyr, even if the clump is initially as compact stellar cluster with a radius of r_c=5 pc. Stellar clusters in an initial orbit with semi-major axis \leq 250 pc may survive to dissolution but their orbits decay towards the center by dynamical friction. In contrast, the stellar clumps can persist for a Hubble time within a cored dark matter halo, even if the initial clump's radius is as extended as r_c=80 pc. We also study the evolution of the clump in the MONDian context. In this scenario, we find that even an extended stellar clump with radius r_c=80 pc survives for a Hubble time, but an unrealistic value for the stellar mass-to-light ratio of 9.2 is needed.
description: 11 pages, 7 figures, 2 tables. Accepted for publication in ApJ
Efficacy of carvacrol on Rhipicephalus (Boophilus) microplus engorged female ticks (Canestrini, 1887) (Acari: Ixodidae): effects on mortality and reproduction
Creators: name: Junior, Amilcar Machado Pereira
name: M. I. Camargo-Mathias
name: E. Daemon
name: A. P. Peconick
name: J. R. Lima-Souza
name: P. R. Oliveira
name: A. S. Braga
name: L. J. Lara
name: R. N. Remedio
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: The activity of carvacrol was evaluated in R. microplus female ticks by estimating the mean lethal concentration (LC50) and the acaricidal efficacy. Ticks were subjected to the Adult Immersion Test (AIT) to calculate LC50. From this value, the AIT was performed again at the concentrations of 20%, 40%, 60%, 80% and 100% of the LC50. Two control groups were established: one treated with distilled water and one with the solvent (ethanol 50%). The following parameters were evaluated: female weight before oviposition, egg mass weight, pre-oviposition and incubation period, hatching percentage, egg production index, fecundity rate, estimated reproduction, reduction in oviposition and hatching, and product efficacy. The obtained LC50 was 20.11 mg/mL. Egg mass weight, egg production index, pre-oviposition and fecundity rates of groups treated with 80% and 100% of LC50 were statistically different when compared to control groups. The product efficacy in groups treated with 100% of LC50 was 61.10%.
Quantifying intangible benefits of water sensitive urban systems and practices: an overview of non-market valuation studies
Creators: name: Gunawardena, Asha
name: Iftekhar, Sayed
name: Fogarty, James
Publisher: name: Taylor & Francis
Year: 2020
Subjects: Biotechnology
Environmental Sciences not elsewhere classified
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Cancer
Science Policy
Computational Biology

description: The positive impacts of water sensitive urban investments on the environment, community well-being, and lifestyles are widely recognised, but the process of formally quantifying these intangible benefits remains an underdeveloped research area. The monetary value of intangible benefits can be estimated using non-market valuation techniques. Here, we provide a review of over 190 existing non-market valuation studies related to water sensitive urban systems and practices that have reported dollar value estimates for intangible benefits. The empirical evidence suggests that communities are willing to make financial contributions towards projects that deliver intangible benefits. As such, incorporating the intangible benefits of water sensitive urban systems and practices into project evaluation processes is important. Unfortunately, attempts to evaluate water-sensitive urban projects based on both tangible and intangible benefits are rare. The summary and synthesis of existing research in this area is presented in the hope that it will facilitate greater use of intangible benefits in project evaluations.
Simultaneous XMM-\textit{Newton} and HST-COS observation of 1H0419-577: II. Broadband spectral modeling of a variable Seyfert galaxy
Creators: name: Di Gesu, L.
name: Costantini, E.
name: Piconcelli, E.
name: Ebrero, J.
name: Mehdipour, M.
name: Kaastra, J. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this paper we present the longest exposure (97 ks) XMM-Newton EPIC-pn spectrum ever obtained for the Seyfert 1.5 galaxy 1H 0419-577. With the aim of explaining the broadband emission of this source, we took advantage of the simultaneous coverage in the optical/UV that was provided in the present case by the XMM-Newton Optical Monitor and by a HST-COS observation. Archival FUSE flux measurements in the FUV were also used for the present analysis. We successfully modeled the X-ray spectrum together with the optical/UV fluxes data points using a Comptonization model. We found that a blackbody temperature of $T \sim 56$ eV accounts for the optical/UV emission originating in the accretion disk. This temperature serves as input for the Comptonized components that model the X-ray continuum. Both a warm ($T_{\rm wc} \sim 0.7 $ keV, $τ_{\rm wc} \sim 7 $) and a hot corona ($T_{\rm hc} \sim 160 $ keV, $τ_{\rm hc} \sim 0.5$) intervene to upscatter the disk photons to X-ray wavelengths. With the addition of a partially covering ($C_v\sim50\%$) cold absorber with a variable opacity ($ {\it N}_{\rm H}\sim [10^{19}- 10^{22}] \,\rm cm^{-2}$), this model can well explain also the historical spectral variability of this source, with the present dataset presenting the lowest one (${\it N}_{\rm H}\sim 10^{19} \, \rm cm^{-2} $). We discuss a scenario where the variable absorber, getting ionized in response to the variations of the X-ray continuum, becomes less opaque in the highest flux states. The lower limit for the absorber density derived in this scenario is typical for the broad line region clouds. Finally, we critically compare this scenario with all the different models (e.g. disk reflection) that have been used in the past to explain the variability of this source
description: 12 pages, 9 figures
The number of reducible space curves over a finite field
Creators: name: Cesaratto, Eda
name: Gathen, Joachim von zur
name: Matera, Guillermo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 11G20

description: "Most" hypersurfaces in projective space are irreducible, and rather precise estimates are known for the probability that a random hypersurface over a finite field is reducible. This paper considers the parametrization of space curves by the appropriate Chow variety, and provides bounds on the probability that a random curve over a finite field is reducible.
title: Digital inequality in urban space of St. Petersburg
Creators: name: Perekatova, Arina A.
Publisher: name: Реноме
Year: 2023

description: The problem of digital inequality is observed in this research. Inequality is represented in online services usage by St. Petersburg residents. The existence theoretical base in the field of digital inequality is described, based on theoretical information there were proposed hypothesis. In order to test hypothesis, the regression analysis of the survey data was conducted. The results have shown that in St. Petersburg, instead of leading position in digitalization, there are problems which are the obstacles of intensive digital development. So, the most vulnerable group, that has problems with Internet access, awareness, trust, skills and benefits is older generation. According to the results, the recommendations for St. Petersburg regional authorities were developed. The importance of decision problems is ensuring equal access to digital amenities for residents through the digital adaptation policy.
description: Раскрывается проблема цифрового неравенства жителей Санкт-Петербурга. Проанализированы основные подходы к изучению цифрового неравенства. С целью проверки основных исследовательских гипотез был проведен опрос. Регрессионный анализ данных показал, что в Санкт-Петербурге, несмотря на лидирующие позиции в цифровизации среди российских регионов, существуют проблемы, которые препятствуют развитию новых технологий. Установлено, что наиболее уязвимой к технологиям социальной группой, испытывающей проблемы с доступом, осведомленностью, доверием, навыками и осознанием выгод, является старшее поколение. По результатам исследования разработаны практические рекомендации для региональных органов власти г. Санкт-Петербурга, суть которых заключается в том, чтобы обеспечить равный доступ к цифровым благам для жителей региона посредством проведения политики адаптации в сфере цифровизации.
Chemical composition, in vitro antiparasitic, antimicrobial and antioxidant activities of Frankenia thymifolia Desf.
Creators: name: Mennai, Imad
name: Hanfer, Mourad
name: Chahrazed Esseid
name: Benayache, Samir
name: Ameddah, Souad
name: Menad, Ahmed
name: Benayache, Fadila
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Developmental Biology
subject: Science Policy
subject: Hematology
subject: Plant Biology

description: This study was performed on the derived fractions [chloroform (FT-C), ethyl acetate (FT-E) and n-butanol (FT-B)] of the 70% ethanol extract prepared from Frankenia thymifolia, endemic to North Africa. The fractions showed high total phenolic and flavonoid contents particularly FT-E. These results agreed with their antioxidant effects. Indeed, all the fractions were able to scavenge 1,1-diphenyl-2-picrylhydrazyl radical, with a better power of FT-E. These results were supported by the inhibition of β-carotene oxidation assay. The fractions showed moderate activity against Acanthamoeba castellanii and Leishmania amazonensis with a better activity of FT-E against A. castellanii. Moreover, FT-B exhibited an interesting antimicrobial activity against all tested bacteria. The phytochemical investigation of the most active fractions (FT-E and FT-B) led to the isolation and structural determination of six compounds. The observed biological activities may be associated with the presence of quercetin and its derivatives found in the chemical composition of these fractions.