cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Additional file 1 of Microbiota-derived tryptophan metabolites indole-3-lactic acid is associated with intestinal ischemia/reperfusion injury via positive regulation of YAP and Nrf2
Creators: name: Zhang, Fang-Ling
name: Chen, Xiao-Wei
name: Wang, Yi-Fan
name: Hu, Zhen
name: Zhang, Wen-Juan
name: Zhou, Bo-Wei
name: Ci, Peng-Fei
name: Liu, Ke-Xuan
Publisher: name: figshare
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Physiology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Science Policy
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Computational Biology

description: Aditional file 1: Table S1. Primer sequences.
Inhibition of pulsatile luteinizing hormone release by atrial natriuretic peptide and brain natriuretic peptide in the ovariectomized rat
Creators: name: Zhang, Jin
Publisher: name: University of British Columbia
Year: 2010

description: Atrial natriuretic peptide (ANP) of atrial myocyte origin, has been shown to play a role in the diuresis, natriuresis, and antagonism of angiotensin and vasopressin. However, it is now apparent that in addition to the production of the peptide in the heart and in its role in fluid and electrolyte homeostasis, it is also produced in the central nervous system participating in the regulation of pituitary hormone secretion. Administration of ANP through both central and peripheral routes has been shown to inhibit secretion of luteinizing hormone (LH) in the gonadectomized rat model. A better understanding of the modulatory role of ANP on LH secretion and its possible mechanisms will add to our knowledge of the effects of neuropeptides on reproductive function. Brain natriuretic peptide (BNP) is a bioactive peptide of 26 amino acid residues recently identified in porcine brain. The peptide exerts potent diuretic-natriuretic and vasorelaxant effects, in a manner similar to that of ANP. BNP has a remarkable high sequence homology to ANP, especially in the 17 amino acid ring formed by an intramolecular disulfide linkage which is required for biological activity. The presence of BNP with ANP in the mammalian brain and remarkable resemblance in their molecular structures and physiological functions implies that BNP may also exert an inhibitory effect on LH secretion like ANP. This research focused on the effects of centrally administered ANP and BNP on pulsatile LH secretion and their possible mechanisms of action in ovariectomized rats. After third ventricle infusion of ANP or BNP, inhibition of mean plasma LH level, LH pulse amplitude and pulse frequency was observed. In searching for the possible mechanisms of inhibitory effect of ANP or BNP on pulsatile LH secretion, the effect of inhibiting the endogenous opiate system with naloxone on the action of centrally administered ANP or BNP was tested. Application of naloxone reversed the inhibitory effect of ANP and BNP on mean plasma LH level and LH pulse amplitude, but in terms of pulse frequency, naloxone treatment failed to reverse the inhibitory effect of ANP or BNP. In separate experiments, pretreatment with pimozide, a dopaminergic receptor blocker, prevented the inhibitory action of ANP and BNP on LH secretion. After infusion of ANP or BNP, there were no significant decrease in mean plasma LH level, pulse amplitude and pulse frequency in the pimozide-pretreated rats. In summary, the present study shows that both ANP and BNP inhibit pulsatile LH secretion, suggesting that the inhibitory effects on LH secretion once thought to be mediated by ANP alone may be regulated through a dual mechanism involving both ANP and BNP. Furthermore, the inhibitory mechanisms may involve the interactions of ANP and BNP with central opiate system and dopaminergic system on LH secretion.
Mapeando la ciencia con VOSviewer
Creators: name: Arroyo-Machado, Wenceslao
Publisher: name: Zenodo
Year: 2021
Subjects: análisis de redes
VOSviewer
mapas de la ciencia
redes

description: Presentación del curso Mapeando la ciencia con VOSviewer de #yosigopublicando, realizado el 19 de febrero de 2021.
Parachinavia creolea Roche 1977
Creators: name: Grazia, J.
name: Schwertner, C. F.
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Pentatomidae
Parachinavia
Parachinavia creolea

description: ParachinaviacreoleaROCHE (Figs 1-11, 22) Parachinaviacreolea Roche, 1977:565 (nov.sp.); Gerlach et al. 2005:107 (distribution). Type-locality: Seychelles. Male. Rostrum just attaining metacoxae (Fig. 3). Measurements (mm±standard deviation): Total length 9.26±0.29, total width 5.20±0.38, head length 1.93±0.11, head width 2.58±0.11, interocular distance 1.48±0.04, interocelar distance 0.88±0.04, head length in front of eyes 0.93±0.04, antennal segment I 0.58±0.02, antennal segment II 0.98±0.07, antennal segment III 1.28±0.02, antennal segment IV 1.43±0.09, antennal segment V 1.42±0.07, rostral segment I 0.73, rostral segment II 1.33, rostral segment III 0.93, rostral segment IV 0.97, pronotum length 1.67±0.28, pronotum width 5.47±0.38, scutellum length 3.33±0.00, scutellum width 3.33±0.19. Pygophore: excavation of ventral rim occupying more than median third of this structure (Figs 4, 6). Parameres: apical portion almost as wide as basal portion; apical margin obtusely rounded; apical process inconspicuous (Fig. 7-8). Female. Unknown. Comments. Roche (1977) mentioned that this species was apparently rare, and until recently it was known only from type material. More recently, Gerlach et al. (2005) extended its distribution. Distinguished from P. prunasis nov. comb. by shorter rostrum, ampliate excavation of ventral rim of pygophore, and narrower parameres, obtusely rounded at apex. Holotype ♂ with the following labels (pygophore dissected): [Seychelles, Mt Fleuri, Mahe, 19.III.1972, P.J.L. Roche // Holotype //7178// Parachinavia creolea gen. & sp.n., P.J.L. Roche det. 1975] (NHM). Paratype ♂ with the following labels (pygophore dissected): [Seychelles: Mahe, Mt Fleuri, 10.I.1972, P.J.L. Roche // Paratype //6712// Parachinavia creolea gen. & sp.n., P.J.L. Roche det. 1975] (MRAC). Distribution (Fig. 22). Seychelles, known from Mahé (Mt. Fleuri) and Silhoutte islands.
description: Published as part of Grazia, J. & Schwertner, C. F., 2008, Review of Parachinavia ROCHE (Hemiptera, Pentatomidae, Pentatominae), pp. 111-121 in Advances in Heteroptera Research, Moscow :Pensoft Publishers on pages 114-116, DOI: 10.5281/zenodo.3648246
description: {"references": ["Roche P. J. L. (1977). Pentatomidae of the granitic islands of Seychelles (Heteroptera). - Revue Zoologique africaine, 91: 558 - 572.", "Gerlach J., M. Madl & P. Matyot (2005). Review of the Pentatomidae of Seychelles Hemiptera, Heteroptera). - Phelsuma, 13: 104 - 108."]}
Nonlinear Matroid Optimization and Experimental Design
Creators: name: Berstein, Yael
name: Lee, Jon
name: Maruri-Aguilar, Hugo
name: Onn, Shmuel
name: Riccomagno, Eva
name: Weismantel, Robert
name: Wynn, Henry
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: Computational Complexity (cs.CC)
subject: Discrete Mathematics (cs.DM)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 90C11, 52B55, 90B06, 68R05, 15A39, 62H17

description: We study the problem of optimizing nonlinear objective functions over matroids presented by oracles or explicitly. Such functions can be interpreted as the balancing of multi-criteria optimization. We provide a combinatorial polynomial time algorithm for arbitrary oracle-presented matroids, that makes repeated use of matroid intersection, and an algebraic algorithm for vectorial matroids. Our work is partly motivated by applications to minimum-aberration model-fitting in experimental design in statistics, which we discuss and demonstrate in detail.
Ordered, disordered and coexistent stable vortex lattices in NbSe_2 single crystals
Creators: name: Pasquini, G.
name: Daroca, D. Perez
name: Chiliotte, C.
name: Lozano, G. S.
name: Bekeris, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: It is commonly accepted that the peak effect (PE) in the critical current density of type II superconductors is a consequence of an order-disorder transition in the vortex lattice (VL). Examination of vortex lattice configurations (VLCs) in its vicinity requires the use of experimental techniques that exclude current induced VL reorganization. By means of linear ac susceptibility experiments in the Campbell regime, where vortices are forced to oscillate (harmonically) around their effective pinning potentials, we explore quasi-static stable and metastable VLCs in NbSe_{2} single crystals near the PE. We identify three different regions: for TT_{2}(H) configurations are fully disordered and no metastability is observed. In the T_{1}
description: 9 pages, 4 figures
Judeo-Spanish : an example from Rhodes
Creators: name: Clewlow, David Frederick
Publisher: name: University of British Columbia
Year: 2010

description: This study explores the Judeo-Spanish dialect through the analysis of an oral sample provided by two native speakers from Rhodes. A twenty-minute segment has been transcribed phonetically and incorporated into the thesis. A preliminary section provides the necessary historical, cultural and linguistic background for the analysis of the sample. Distinctive phonetic, morphological, lexical and syntactical features of the informants1 speech are pointed out and their significance demonstrated both synchronically, in relation to Eastern Judeo-Spanish and modern Hispanic Romance, and diachronically, showing survival of old Spanish elements. In the conclusion, the writer states that the development of the dialect was the result of the unique sociological conditions prevailing in the Sephardic communities of the ottoman Empire and highlights both the historical continuity of Judeo-Spanish as well as its participation in the common heritage of Hispano-Romance. He notes the presence or lack of certain foreign elements in their speech and alludes to Westernization and their education on Rhodes. He mentions differences in their pronunciation. The writer concludes that the segment of the dialogue recorded and transcribed is representative of the distinctive features of Judeo-Spanish and that, as such, it is a good introduction to the dialect.
Molecular dynamic simulations study of 2-((2-(decyloxy)ethyl)amino)lauric acid adsorption on the α-quartz (1 0 1) surface
Creators: name: Binbin, Luo
name: Yimin, Zhu
name: Chuanyao, Sun
name: Yanjun, Li
name: Yuexin, Han
Publisher: name: Faculty of Geoengineering, Mining and Geology, Wrocław University of Technology, Wrocław
Year: 2019
Subjects: α-quartz, molecular dynamic, 2-((2-(decyloxy)ethyl)amino)lauric acid, flotation mechanism

description: Physicochemical Problems of Mineral Processing; ISSN 2084-4735
Electrical conduction of silicon oxide containing silicon quantum dots
Creators: name: Pi, X. D.
name: Zalloum, O. H. Y.
name: Knights, A. P.
name: Mascher, P.
name: Simpson, P. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Current-voltage measurements have been made at room temperature on a Si-rich silicon oxide film deposited via Electron-Cyclotron Resonance Plasma Enhanced Chemical Vapor Deposition (ECR-PECVD) and annealed at 750 - 1000$ ^\circ$C. The thickness of oxide between Si quantum dots embedded in the film increases with the increase of annealing temperature. This leads to the decrease of current density as the annealing temperature is increased. Assuming the Fowler-Nordheim tunneling mechanism in large electric fields, we obtain an effective barrier height $ϕ_{eff}$ of $\sim$ 0.7 $\pm$ 0.1 eV for an electron tunnelling through an oxide layer between Si quantum dots. The Frenkel-Poole effect can also be used to adequately explain the electrical conduction of the film under the influence of large electric fields. We suggest that at room temperature Si quantum dots can be regarded as traps that capture and emit electrons by means of tunneling.
description: 14 pages, 5 figures, submitted to J. Phys. Conden. Matt
Modeling of double heterojunction bipolar transistors
Creators: name: Ang, Oon Sim
Publisher: name: University of British Columbia
Year: 2010

description: A one-dimensional analytical model in the Ebers-Moll formulation of a graded base double heterojunction bipolar transistor (DHBT) is developed and used to examine the effects of base grading, the emitter-base barrier and the base-collector barrier on the d.c. current gain, offset voltage and the high frequency performance of a N — Al[formula omitted]Ga₁[formula omitted]As/p — Al[formula omitted]Ga₁[formula omitted]As/N — Al[formula omitted]Ga₁[formula omitted]As DHBTs. Recombination processes considered in the space charge regions and the neutral regions are: Shockley-Read-Hall, radiative and Auger. The trade-off between base-grading, which reduces the base current, and the neutral base recombination, which is brought about by varying the aluminium the junctions, results in an optimum aluminium mole fraction profile regarding the d.c. current gain. For high frequency performance, a similar trade-off to that of the d.c. situation exists. In this case, the important manifestation of the increased collector-base barrier height is an increase in the base transit time. The aluminium mole fraction profile which optimises the unity gain cut-off frequency, f[formula omitted], and the unity power gain cut-off frequency, f[formula omitted], is established. DHBTs which are symmetrical, both in aluminium mole fraction and doping concentration profiles, are shown to have low common-emitter offset voltages, V[formula omitted],[formula omitted]. Base-grading reduces V[formula omitted],[formula omitted] in devices in which the difference between the emitter and collector aluminium mole fraction is < 0.1; otherwise, V[formula omitted],[formula omitted] increases as base-grading increases. The model is also used to examine the performance of a N-Al[formula omitted]Ga₁[formula omitted]As/p-In[formula omitted]Ga₁[formula omitted]As/N-Al[formula omitted]Ga₁[formula omitted]As DHBT. It is shown that radiative and Auger recombination limit the d.c. current gain in this device.
Besdolus illyricus Kovacs et Zwick 2008
Creators: name: Kovács, Tibor
name: Murányi, Dávid
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlodidae
Besdolus
Besdolus illyricus

description: Besdolus illyricus Kovács et Zwick, 2008 Material examined. ALBANIA: Mat county, Dejë Mts, open stream towards Fushë Lurë, N 41°39.829' E 20°11.730', 1210 m, 13.04.2006, 3 larvae, Zoltán ErőssZoltán Fehér-András Hunyadi-Dávid Murányi, PLP2230 – Shkodër county, Prokletije Mts, Okol, stream along the conjunction to Pejë Pass from the Bogë-Okol road, N 42°24.496' E 19°45.271', 1009 m, 30.05.2005, 1 exuviae, Krisztina Balogh-Zoltán Barina-Dávid Murányi-Dániel Pifkó, PLP2292 – Shkodër county, Prokletije Mts, Okol, stream along the path from Okol to Valbonë Pass, N 42°24.255' E 19°46.483', 895 m, 01.06.2005, 1 exuviae, Krisztina Balogh-Zoltán Barina-Dávid Murányi-Dániel Pifkó, PLP2293 – Shkodër county, Prokletije Mts, Theth, Shalë River, N 42°23.695' E 19°46.265', 750 m, 03.06.2005, 1 exuviae, Krisztina Balogh-Zoltán Barina-Dávid Murányi-Dániel Pifkó, PLP2294. Remarks. The species was recently described from Montenegro by Kovács & Zwick (2008). It is new to the fauna of Albania. It was found in four localities of two mountain systems (Dejë Mts, Prokletije Mts). The ecological conditions of the sites are similar to those described for the type locality, but the altitude range is wider (750–1210 m a.s.l.).
description: Published as part of Kovács, Tibor & Murányi, Dávid, 2008, New Data On Genus Besdolus From The Balkan Peninsula (Plecoptera: Perlodidae), pp. 91-93 in Illiesia 4 (9) on page 91, DOI: 10.5281/zenodo.4758986
description: {"references": ["Kovacs, T. & P. Zwick. 2008. Contribution to the knowledge of genus Besdolus (Plecoptera: Perlodidae). Aquatic Insects, 30 (3): 179 - 186."]}
Uniformly bounded components of normality
Creators: name: Wang, Xiaoling
name: Zhou, Wang
Publisher: name: arXiv
Year: 2007
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 37F10; 37F45

description: Suppose that $f(z)$ is a transcendental entire function and that the Fatou set $F(f)\neq\emptyset$. Set $$B_1(f):=\sup_{U}\frac{\sup_{z\in U}\log(|z|+3)}{\inf_{w\in U}\log(|w|+3)}$$ and $$B_2(f):=\sup_{U}\frac{\sup_{z\in U}\log\log(|z|+30)}{\inf_{w\in U}\log(|w|+3)},$$ where the supremum $\sup_{U}$ is taken over all components of $F(f)$. If $B_1(f)
description: 17 pages, a revised version, to appear in Mathematical Proceedings Cambridge Philosophical Society
Removal and recovery of phosphonates from wastewater via adsorption
Creators: name: Altaf, Rubina
name: Sun, Bo
name: Lu, Huijie
name: Zhao, Heping
name: Liu, Dezhao
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
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: Over the past decades, the increasing consumption of phosphonates, which are limited resources, has attracted greater attention at the world level. Phosphonate in wastewater is a crucial resource while it may cause eutrophication as a serious environmental problem. Hence phosphonates removal and recovery from wastewater are crucial for sustainable development consideration. Adsorption as a cost-effective technology for low-concentration phosphonates resource utilization has contributed to sustainable wastewater treatment practices. Nevertheless, a systematic review on phosphonates removal and recovery from wastewater via economically realistic adsorption technique is still missing and therefore is realized in this review, especially regarding novel adsorbents. Additionally, we discussed the influence of pH and metal ions on adsorption performance and the role of characterization and chemical computation techniques for phosphonates removal mechanism. The recently established novel adsorbents (granular ferric hydroxide, ZnFeZr@MP, La/Zn/Fe3O4@PAC, Zr-La@Fe3O4, and montmorillonite) provided good adsorption capacity and removal efficiency of phosphonates. Specifically, the ZnFeZr@MP was implemented for practical application in industrial and municipal wastewater, and ZnFeZr-oxyhydroxide suggested a potential endothermic process could be realized in application practices. High desorption efficiency typically obtained by ZnFeZr (NTMP-90%; DTPMP-100%), Zr-La@Fe3O4 (96.1% and 101.8%), and clay minerals (100%) from the reusability tests. During the practically column breakthrough treatment >90% removal efficiency and 78% desorption efficiency of NTMP were achieved from membrane concentrate. Further, various modern characterization tools enhanced the investigation of phosphonate removal mechanisms. Thus, this review article is recommended to explore the mechanism for phosphonate removal and adsorption via characterization and chemical computation techniques in the future.
Asymptotic Flatness, Little String Theory, and Holography
Creators: name: Marolf, Donald
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We argue that any non-gravitational holographic dual to asymptotically flat string theory in $d$-dimensions naturally resides at spacelike infinity. Since spacelike infinity can be resovled as a $(d-1)$-dimensional timelike hyperboloid (i.e., as a copy of de Sitter space in $(d-1)$ dimensions), the dual theory is defined on a Lorentz signature spacetime. Conceptual issues regarding such a duality are clarified by comparison with linear dilaton boundary conditions, such as those dual to little string theory. We compute both time-ordered and Wightman boundary 2-point functions of operators dual to massive scalar fields in the asymptotically flat bulk.
description: 27 pages, 2 figures. Explicit discussion added of using the Wightman function method to calculate time-ordered boundary 2-point functions. The resulting branch cuts are linked to the bulk spectrum of states
Besdolus imhoffi
Creators: name: Kovács, Tibor
name: Murányi, Dávid
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlodidae
Besdolus
Besdolus imhoffi

description: Besdolus imhoffi (Pictet, 1841) Material examined. CROATIA: Mala Kapela, Plitvička jezera, 14.05.2005, 1 exuviae, 1 male imago, Dávid Murányi, PLP1768. Remarks. Only one, more than one hundred years old record (Agram, 11 Mai 1900) of this species was known from Croatia (Klapálek 1912, under the name Dictyogenus ventralis (= Besdolus ventralis), see Zwick & Weinzierl 1995). However, based on unpublished results of Aleksandar Popijač, this species is common in some rivers of the country (Aleksandar Popijač and Ignac Sivec, pers. comm.).
description: Published as part of Kovács, Tibor & Murányi, Dávid, 2008, New Data On Genus Besdolus From The Balkan Peninsula (Plecoptera: Perlodidae), pp. 91-93 in Illiesia 4 (9) on page 91, DOI: 10.5281/zenodo.4758986
description: {"references": ["Klapalek, F. 1912. Plecopteres I. Fam. Perlodidae. Collections zoologiques du Baron Edm. de Selys-Longchamps 4: 1 - 66.", "Zwick, P. & A. Weinzierl. 1995. Reinstatement and revision of genus Besdolus (Plecoptera: Perlodidae). Entomologica scandinavica, 26: 1 - 16."]}
Unitarity of the Leptonic Mixing Matrix
Creators: name: Antusch, S.
name: Biggio, C.
name: Fernandez-Martinez, E.
name: Gavela, M. B.
name: Lopez-Pavon, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We determine the elements of the leptonic mixing matrix, without assuming unitarity, combining data from neutrino oscillation experiments and weak decays. To that end, we first develop a formalism for studying neutrino oscillations in vacuum and matter when the leptonic mixing matrix is not unitary. To be conservative, only three light neutrino species are considered, whose propagation is generically affected by non-unitary effects. Precision improvements within future facilities are discussed as well.
description: Standard Model radiative corrections to the invisible Z width included. Some numerical results modified at the percent level. Updated with latest bounds on the rare tau decay. Physical conculsions unchanged
The alkaloids with neuroprotective effect from the root bark of Ailanthus altissima
Creators: name: Shao, Qing
name: Li, Tian-Yi
name: Quan, Wei
name: Wang, Hui
name: Yan, Ke-Yu
name: Qiu, Peng-Cheng
name: Tang, Hai-Feng
name: Lu, Yun-Yang
Publisher: name: Taylor & Francis
Year: 2022
Subjects: Biophysics
Biochemistry
Pharmacology
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified

description: The chemical constituent investigation on the root bark of Ailanthus altissima leads to the isolation of a new β-carboline alkaloid, 14(S),15-dihydroxy-6-methoxy-β-carboline (1), along with nine known alkaloids. The structure of new compound was elucidated on basis of extensive spectroscopic analysis, especially two-dimensional (2D) NMR techniques and the absolute configuration of C-14 was determined by ECD calculation. The neuroprotective effect of the isolated compounds on PC12 cells against the serum deprivation injury was evaluated by MTT method. As a result, compound 7 revealed protective effect on PC12 cells and the cell survival rate was significantly increased.
Vestiges of upland fields in Central Veracruz : a new perspective on its Precolumbian human ecology
Creators: name: Sluyter, Andrew
Publisher: name: University of British Columbia
Year: 2010

description: Typically, Mesoamericanists do not credit that part of Veracruz State bounded by the Sierra de Chiconquiaco, the Cotaxtla River, and the lower slopes of the escarpment of the Sierra Madre Oriental with having played a key role in Precolumbian social history. The region's sub-humid climate and savanna vegetation would seem to have precluded intensive agriculture and dense population. However, evidence of intensive maize cultivation there by the Late Preclassic is now apparent in some 2,200 ha of wetlands. More central to this thesis, evidence of intensive agriculture throughout some 1,000 km2 of gently sloping piedmont west of the wetlands is also apparent. There, deeply incised streams separate upland areas. On the interfluvial surfaces, linear concentrations of stones closely follow slope contours and form contiguous networks of upland fields over hundreds of hectares. Analogues and the ecological context suggests a water and soil management technology. Direct evidence for cultivars and a chronology is still lacking, but ethnohistorical data and plant ecology suggest cotton, maize, agave, and a Precolumbian origin. Furthermore, archaeological and iconographic data suggest a relationship between these lowlands and the emergence of the highland centre of Teotihuacan, Mesoamerica's first metropolis. To elaborate this hypothetical connection, further work is necessary on the nature and timing of human ecological change in both Central Veracruz and the Valley of Mexico.
Rank deficiency and Tikhonov regularization in the inverse problem for gravitational-wave bursts
Creators: name: Rakhmanov, Malik
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Coherent techniques for searches of gravitational-wave bursts effectively combine data from several detectors, taking into account differences in their responses. The efforts are now focused on the maximum likelihood principle as the most natural way to combine data, which can also be used without prior knowledge of the signal. Recent studies however have shown that straightforward application of the maximum likelihood method to gravitational waves with unknown waveforms can lead to inconsistencies and unphysical results such as discontinuity in the residual functional, or divergence of the variance of the estimated waveforms for some locations in the sky. So far the solutions to these problems have been based on rather different physical arguments. Following these investigations, we now find that all these inconsistencies stem from rank deficiency of the underlying network response matrix. In this paper we show that the detection of gravitational-wave bursts with a network of interferometers belongs to the category of ill-posed problems. We then apply the method of Tikhonov regularization to resolve the rank deficiency and introduce a minimal regulator which yields a well-conditioned solution to the inverse problem for all locations on the sky.
description: 12 pages, 5 figures
The Big-Bang Singularity in the framework of a Generalized Uncertainty Principle
Creators: name: Battisti, Marco Valerio
name: Montani, Giovanni
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyze the quantum dynamics of the Friedmann-Robertson-Walker Universe in the context of a Generalized Uncertainty Principle. Since the isotropic Universe dynamics resembles that of a one-dimensional particle, we quantize it with the commutation relations associated to an extended formulation of the Heisenberg algebra. The evolution of the system is described in terms of a massless scalar field taken as a relational time. We construct suitable wave packets and analyze their dynamics from a quasi-classical region to the initial singularity. The appearance of a non singular dynamics comes out as far as the behavior of the probability density is investigated. Furthermore, reliable indications arise about the absence of a Big-Bounce, as predicted in recent issues of Loop Quantum Cosmology.
description: 4 pages, 2 figures; v2: section added, to appear on PLB
Nuclear equation of state at high baryonic density and compact star constraints
Creators: name: Basu, D. N.
name: Chowdhury, P. Roy
name: Samanta, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A mean field calculation is carried out to obtain the equation of state (EoS) of nuclear matter from a density dependent M3Y interaction (DDM3Y). The energy per nucleon is minimized to obtain ground state of the symmetric nuclear matter (SNM). The constants of density dependence of the effective interaction are obtained by reproducing the saturation energy per nucleon and the saturation density of SNM. The energy variation of the exchange potential is treated properly in the negative energy domain of nuclear matter. The EoS of SNM, thus obtained, is not only free from the superluminosity problem but also provides excellent estimate of nuclear incompressibility. The EoS of asymmetric nuclear matter is calculated by adding to the isoscalar part, the isovector component of M3Y interaction. The SNM and pure neutron matter EoS are used to calculate the nuclear symmetry energy which is found to be consistent with that extracted from the isospin diffusion in heavy-ion collisions at intermediate energies. The $β$ equilibrium proton fraction calculated from the symmetry energy and related theoretical findings are consistent with the constraints derived from the observations on compact stars.
description: 26 pages including 2 tables and 7 figures
So Many Shades of Grey: Using Your Judgement to Answer Copyright Queries
Creators: name: Sewell, Claire
Publisher: name: Apollo - University of Cambridge Repository
Year: 2019
Subjects: copyright
scholarly communication
research support
libraries
librarianship
academic librarians

description: From the fair dealing to sharing your research online, it seems that nothing with copyright is ever simple. There are few black and white rules about copyright but there are consequences for getting something wrong! This webinar will cover some of the most common grey areas in copyright such as fair dealing and expiry dates and offer librarians some strategies to make decisions and help advise their research community on copyright issues.
Effective masses for zigzag nanotubes in magnetic fields
Creators: name: Korotyaev, Evgeny
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider the Schrödinger operator with a periodic potential on quasi-1D models of zigzag single-wall carbon nanotubes in magnetic field. The spectrum of this operator consists of an absolutely continuous part (intervals separated by gaps) plus an infinite number of eigenvalues with infinite multiplicity. We obtain identities and a priori estimates in terms of effective masses and gap lengths.
Reflexões sobre a docência no ensino superior presencial público e privado no Brasil
Creators: name: Mota Júnior, Antônio de Macêdo
name: Freitas, Valéria Santana de
Publisher: name: figshare
Year: 2021
Subjects: subject: 130304 Educational Administration, Management and Leadership
subject: FOS: Educational sciences

description: Este trabalho apresenta resultados preliminares de pesquisa exploratória, bibliográfica e documental, tendo como tema o contexto e a prática do docente em sua atuação no ensino superior presencial, visando levantar reflexões sobre essa prática na rede pública e privada do Brasil. O estudo ainda caracteriza o panorama atual do ensino superior brasileiro, bem como apresenta reflexões sobre o papel do docente na sua atuação nessa modalidade de ensino e os desafios presentes na atualidade. Os resultados destacam a necessidade do papel desse docente, enquanto mediador e pesquisador, intercambiar saberes e práticas para a produção de conhecimentos contextualizados e atualizados, utilizando-se da didática e da interdisciplinaridade, devendo ainda dominar competências e a capacidade de selecionar bons conteúdos.
Partnering up with researchers in a national library
Creators: name: Kleppe, Martijn
name: Claeyssens, Steven
name: Veldhoen, Sara
name: Wilms, Lotte
Publisher: name: Zenodo
Year: 2019

description: Slides of the paper presented at the DH2019 pre-conference 'Libraries as research partner in Digital Humanities', The Hague, The Netherlands, 8 July 2019. This paper presents how the National Library of the Netherlands (KB) collaborates with researchers in various forms to better serve their needs but also to improve our own services.
Clustering of matter in waves and currents
Creators: name: Vucelja, M.
name: Falkovich, G.
name: Fouxon, I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The growth rate of small-scale density inhomogeneities (the entropy production rate) is given by the sum of the Lyapunov exponents in a random flow. We derive an analytic formula for the rate in a flow of weakly interacting waves and show that in most cases it is zero up to the fourth order in the wave amplitude. We then derive an analytic formula for the rate in a flow of potential waves and solenoidal currents. Estimates of the rate and the fractal dimension of the density distribution show that the interplay between waves and currents is a realistic mechanism for providing patchiness of pollutant distribution on the ocean surface.
description: 4 pages, 1 figure
"Kludge" gravitational waveforms for a test-body orbiting a Kerr black hole
Creators: name: Babak, Stanislav
name: Fang, Hua
name: Gair, Jonathan R.
name: Glampedakis, Kostas
name: Hughes, Scott A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: One of the most exciting potential sources of gravitational waves for low-frequency, space-based gravitational wave (GW) detectors such as the proposed Laser Interferometer Space Antenna (LISA) is the inspiral of compact objects into massive black holes in the centers of galaxies. The detection of waves from such "extreme mass ratio inspiral" systems (EMRIs) and extraction of information from those waves require template waveforms. The systems' extreme mass ratio means that their waveforms can be determined accurately using black hole perturbation theory. Such calculations are computationally very expensive. There is a pressing need for families of approximate waveforms that may be generated cheaply and quickly but which still capture the main features of true waveforms. In this paper, we introduce a family of such "kludge" waveforms and describe ways to generate them. We assess performance of the introduced approximations by comparing "kludge" waveforms to accurate waveforms obtained by solving the Teukolsky equation in the adiabatic limit (neglecting GW backreaction). We find that the kludge waveforms do extremely well at approximating the true gravitational waveform, having overlaps with the Teukolsky waveforms of 95% or higher over most of the parameter space for which comparisons can currently be made. Indeed, we find these kludges to be of such high quality (despite their ease of calculation) that it is possible they may play some role in the final search of LISA data for EMRIs.
description: 29 pages, 11 figures, requires subeqnarray; v2 contains minor changes for consistency with published version
Subtle Signatures of Multiplicity in Late-type Dwarf Spectra: The Unresolved M8.5 + T5 Binary 2MASS J03202839-0446358
Creators: name: Burgasser, Adam J.
name: Liu, Michael C.
name: Ireland, Michael J.
name: Cruz, Kelle L.
name: Dupuy, Trent J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Evidence is presented that 2MASS J03202839-0446358, a late-type dwarf with discrepant optical (M8:) and near-infrared (L1) spectral types, is an as-yet unresolved stellar/brown dwarf binary with late-type M dwarf and T dwarf components. This conclusion is based on low-resolution, near-infrared spectroscopy that reveals a subtle but distinctive absorption feature at 1.6 micron. The feature, which is also present in the combined light spectrum of the M8.5 + T6 binary SCR 1845-6357, arises from the combination of FeH absorption from an M8.5 primary and pseudo-continuum flux from a T5+/-1 secondary, as ascertained from binary spectral templates constructed from empirical data. The binary templates provide a far superior match to the overall near-infrared spectral energy distribution of 2MASS J0320-0446 than any single comparison spectra. Laser guide star adaptive optics (LGS AO) imaging observations, including the first application of LGS AO aperture mask interferometry, fail to resolve a faint companion, restricting the projected separation of the system to less than 8.3 AU at the time of observation. 2MASS J0320-0446 is the second very low mass binary to be identified from unresolved, low-resolution, near-infrared spectroscopy, a technique that complements traditional high resolution imaging and spectroscopic methods.
description: 19 pages, 8 figures; accepted for publication to ApJ (submitted 4 January 2008)
Holographic Wilson Loops
Creators: name: Gomis, Jaume
name: Passerini, Filippo
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that all half-BPS Wilson loop operators in N=4 SYM -- which are labeled by Young tableaus -- have a gravitational dual description in terms of D5-branes or alternatively in terms of D3-branes in AdS_5xS^5. We prove that the insertion of a half-BPS Wilson loop operator in the cal N=4 SYM path integral is achieved by integrating out the degrees of freedom on a configuration of bulk D5-branes or alternatively on a configuration of bulk D3-branes. The bulk D5-brane and D3-brane descriptions are related by bosonization.
description: 35 pages, harvmac; added references and comments
Ecophysiological assessment of western hemlock and western red cedar greenhouse stocktypes
Creators: name: Major, John E.
Publisher: name: University of British Columbia
Year: 2010

description: Western hemlock (Tsuga heterophylla (Raf.) Sarg.) and western red cedar (Thuja plicata Donn) seedlings from four dormancy induction treatment(s) (DIT) (i.e. long-day dry, long-day wet, short-day dry, and short-day wet) were planted on a high available soil moisture field site in British Columbia and monitored for physiological response and morphological development over the first growing season. Stomatal conductance (gwv) and net photosynthesis (Pn) were recorded over an environmental matrix of photosynthetically active radiation (PAR) (0 - 2.2 mmol m⁻² s⁻¹ ) and vapour pressure deficit (VPD) (0 - 2.5 or 4.0 kPa) on both first year grown and fully developed second year foliage. To compare stocktypes, physiological data were collected and analyzed in the following ways: (1) replicated data at stable environmental conditions once a month, (2) physiological response to one increasing environmental variable using boundary line analysis, and (3) physiological response surface to two simultaneously changing environmental variables. For western hemlock first year needles, short-day DIT had a higher gwv response to both increasing VPD and PAR. Both short-day and moisture stressed DIT improved Pn response to PAR, and the combination had the highest response. Short-day DIT seedlings initially were smaller, shorter, had a better seedling water balance ratio and lower shoot to root ratio. Short-day second year needles showed a slightly higher gwv response to both increasing VPD and PAR as compared to long-day seedlings; however, they showed no treatment differences for Pn versus PAR. All stocktypes had similar final morphological parameter values. For western red cedar first year foliage, moisture stressed DIT seedlings had greater Pn response to increasing PAR and VPD. Also, moisture stressed seedlings gwv response to increasing VPD and PAR was higher when compared to its' non moisture stressed daylength counterpart. The long-day wet seedlings initially had a larger root and shoot system as compared to the other stocktypes. Second year foliage exhibited no treatment differences for gwv and Pn response to PAR ' and VPD. All stocktypes had similar final morphological parameter values. Attempts to test stocktypes at stable environmental conditions proved, at times, difficult. Potentially large measurement variation due to atmospheric environmental changes, and not stocktype effect, could result. Boundary line analysis, when used correctly and with sufficient data, offers a good stocktype assessment method which enables the isolation of a physiological response to one environmental variable. Three dimensional surface response technique was required to provide a clear conceptual representation of two primary environmental variables' influence on seedling physiological response.
Semiparametrically efficient rank-based inference for shape I. optimal rank-based tests for sphericity
Creators: name: Hallin, Marc
name: Paindaveine, Davy
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62M15, 62G35 (Primary)

description: We propose a class of rank-based procedures for testing that the shape matrix $\mathbf{V}$ of an elliptical distribution (with unspecified center of symmetry, scale and radial density) has some fixed value ${\mathbf{V}}_0$; this includes, for ${\mathbf{V}}_0={\mathbf{I}}_k$, the problem of testing for sphericity as an important particular case. The proposed tests are invariant under translations, monotone radial transformations, rotations and reflections with respect to the estimated center of symmetry. They are valid without any moment assumption. For adequately chosen scores, they are locally asymptotically maximin (in the Le Cam sense) at given radial densities. They are strictly distribution-free when the center of symmetry is specified, and asymptotically so when it must be estimated. The multivariate ranks used throughout are those of the distances--in the metric associated with the null value ${\mathbf{V}}_0$ of the shape matrix--between the observations and the (estimated) center of the distribution. Local powers (against elliptical alternatives) and asymptotic relative efficiencies (AREs) are derived with respect to the adjusted Mauchly test (a modified version of the Gaussian likelihood ratio procedure proposed by Muirhead and Waternaux [Biometrika 67 (1980) 31--43]) or, equivalently, with respect to (an extension of) the test for sphericity introduced by John [Biometrika 58 (1971) 169--174]. For Gaussian scores, these AREs are uniformly larger than one, irrespective of the actual radial density. Necessary and/or sufficient conditions for consistency under nonlocal, possibly nonelliptical alternatives are given. Finite sample performances are investigated via a Monte Carlo study.
description: Published at http://dx.doi.org/10.1214/009053606000000731 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Analytical study of plant/environment interactions in thimbleberry and devil's club
Creators: name: Mason, Rosemary
Publisher: name: University of British Columbia
Year: 2010

description: The morphology, phenology and stem demography of devil's club and thimbleberry were examined to elucidate their niche utilization strategies. The study was conducted in the Kitimat River valley in west central B.C. during the 1986 and 1987 growing seasons. Thimbleberry was sampled in a girdled alder site and a nongirdled alder site, whereas devil's club was sampled in an old growth forest. The variation in the plant characters, as summarized by principal components axes, was apportioned within and among clones, between sites, years, and species. Except for the thimbleberry vegetative phenology, within-sites differences accounted for most variation and variation between-sites often exceeded that between years. Moreover, between-species differences accounted for less variation than within-species differences for morphology and phenology. The variation in plant characters was also examined in relation to canopy cover, soils and adjacent vegetation using multivariate methods. The rate of vegetative development for devil's club in 1986 increased as canopy cover decreased; other environmental measures were uncorrelated with devil's club. Both vegetative and reproductive rates of development increased with disturbance due to girdling and increasing moisture for the combined girdled and ungirdled thimbleberry data set. Similarly, morphdodcal size was greater for the combined thimbleberry data set with increasing moisture and dsturbance. Environmental correlations were reflected differently within-sites, however, with rates of development, plant size and the number of flowers decreasing with increasing moisture at the nongirdled thimbleberry site. The relationship between plant characters was also assessed. Phenology and morphology were correlated for both devil's dub and thimbleberry; stem development began earlier and was more rapid with increasing stem size. Demography and phenology were unrelated. Both species displayed different niche utilization strategies; thimbleberry being more flexible than devil's club. In contrast to devil's dub, thimbleberry is morphologically a phenologically responsive to disturbance and is mizomatous rather man stoloniterous. Stems and lateral branches also had several phonological and developmental possibilities. This flexibility imparted an advantage to thimbleberry in the fluctuating conditions of its earlier successional niche. The differing correlation structure between and within thimbleberry sites suggests that several scales of observation are necessary to clarify plant-environment relationships. Moreover, as environmental characters interact differently with plants from site to site, management must be site specific. Alder girdling may be a judicious management technique at drier sites, where thimbleberry is not as prolific under an open canopy.
Synthesis, Characterisation, and Biological Evaluation of Novel Metal Flavonolate Complexes
Creators: name: BURKE, KIRRALEE JACALYNE
Publisher: name: Monash University
Year: 2022
Subjects: subject: 39904 Organometallic Chemistry
subject: FOS: Chemical sciences
subject: 30201 Bioinorganic Chemistry

description: Flavonols are molecules of plant origin with diverse therapeutic properties. This work explored the synthesis and biological evaluation of flavonolate complexes with medicinally-relevant metals, namely: gallium, indium, and bismuth. Important structural features that determine the solubility and biological activity of the respective metal-flavonolate complexes were elucidated; providing a foundation for the rational design of effective metal-based antibacterial and anticancer agents.