cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Tabletting Solid Dispersions of Bicalutamide Prepared Using Ball-milling or Supercritical Carbon Dioxide: The Interrelationship between Phase Transition and In-vitro Dissolution
Creators: name: Antosik-Rogóż, Agata
name: Szafraniec-Szczęsny, Joanna
name: Gawlak, Karolina
name: Knapik-Kowalczuk, Justyna
name: Paluch, Marian
name: Jachowicz, Renata
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Genetics
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: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: The studies were aimed at formulating tablets containing bicalutamide-PVP K-29/32 solid dispersions and accessing the interrelationships between the properties of obtained binary systems in the form of powder and compacts. The effect of the compression of the solid dispersions obtained by either milling or using the supercritical fluid method on the dissolution and phase transition of the drug was investigated. Mechanical stress induced the amorphization of the drug, while the treatment with supercritical carbon dioxide did not cause any phase transition as confirmed by X-ray diffractometry. Co-processing of the drug substance with the carrier resulted in even a 10-fold improvement of the bicalutamide dissolution from the solid dispersions. The release of the drug from tablets was lower than from the corresponding powder system.
Mean Angular Diameters and Angular Diameter Amplitudes of Bright Cepheids
Creators: name: Moskalik, P.
name: Gorynya, N. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We predict mean angular diameters and amplitudes of angular diameter variations for all monoperiodic Pop.I Cepheids brighter than = 8.0mag. The catalog is intended to aid selecting most promising Cepheid targets for future interferometric observations.
description: 14 pages, 3 figures
ERKIN VOHIDOV SHE'RLARIDA GUL OBRAZI
Creators: name: Asadov, Ikrom
Publisher: name: Zenodo
Year: 2024

description: XX asrning 60-yillarida E.Vohidov, Jamol Kamol,  A.Oripov, S.Vohidov, Rauf Parfi, Sadriddin Salim Buxoriy singari yetuk iste’dod egalari o‘zbek she’riyatiga turfa xil obraz, timsol, ramzlarni olib kirishdi. Mazkur maqolada Erkin Vohidovning she’rlarida gul obrazi qay yo‘sinda qo‘llanilgani haqida fikr boradi.
Time delay of SBS 0909+532
Creators: name: Ullan, A.
name: Goicoechea, L. J.
name: Zheleznyak, A. P.
name: Koptelova, E.
name: Bruevich, V. V.
name: Akhunov, T.
name: Burkhonov, O.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The time delays between the components of a lensed quasar are basic tools to analyze the expansion of the Universe and the structure of the main lens galaxy halo. In this paper, we focus on the variability and time delay of the double system SBS 0909+532A,B as well as the time behaviour of the field stars. We use VR optical observations of SBS 0909+532A,B and the field stars in 2003. The frames were taken at Calar Alto, Maidanak and Wise observatories, and the VR light curves of the field stars and quasar components are derived from aperture and point-spread function fitting methods. We measure the R-band time delay of the system from the chi-square and dispersion techniques and 1000 synthetic light curves based on the observed records. One nearby field star (SBS 0909+532c) is found to be variable, and the other two nearby field stars are non-variable sources. With respect to the quasar components, the R-band records seem more reliable and are more densely populated than the V-band ones. The observed R-band fluctuations permit a pre-conditioned measurement of the time delay. From the chi-square minimization, if we assume that the quasar emission is observed first in B and afterwards in A (in agreement with basic observations of the system and the corresponding predictions), we obtain a delay of - 45 (+ 1)/(- 11) days (95% confidence interval). The dispersion technique leads to a similar delay range. A by-product of the analysis is the determination of a totally corrected flux ratio in the R band (corrected by the time delay and the contamination due to the galaxy light). Our 95% measurement of this ratio (0.575 +/- 0.014 mag) is in excellent agreement with previous results from contaminated fluxes at the same time of observation.
description: 26 pages, 15 figures, Astronomy and Astrophysics (see also http://www.astro.ulg.ac.be/RPub/Colloques/JENAM/proceedings/proceedings.html - Quasars Section)
WOODLOT DEVOLUTION IN NORTHERN ETHIOPIA: OPPORTUNITIES FOR EMPOWERMENT, SMALLHOLDER INCOME DIVERSIFICATION, AND SUSTAINABLE LAND MANAGEMENT
Creators: name: Jagger, Pamela
name: Pender, John L.
name: Gebremedhin, Berhanu
name: Jagger, Pamela
name: Pender, John L.
name: Gebremedhin, Berhanu
Publisher: name: Unknown
Year: 2003
Subjects: Land Economics/Use

description: This paper explores the patterns and determinants of empowerment, income generation, and environmental sustainability under varying degrees of woodlot management in Tigray, Ethiopia. Our analysis is based upon a survey of 120 collectively managed woodlots, devolved to varying degrees, and 66 households that have recently received small plots of community land for tree planting. We find that more devolved woodlot management empowers resource users by providing greater autonomy regarding the management of woodlots, and in particular the ability to make decisions about the harvest of woodlot products. Our economic analysis indicates that grass is by far the most important product being harvested from woodlots. There has been very limited harvesting of higher value products such as poles and fuelwood, which are in very short supply in the region. Labor inputs declined, and average annual net benefits improved as woodlots were more devolved, indicating that devolved woodlots are more economically efficient. Woodlots were generally perceived to be associated with positive changes in environmental conditions such as the slowing of erosion and gully formation, and the maintenance of biodiversity. However, greater environmental benefits were associated with less devolved woodlots. This study highlights the trade-offs inherent in varying levels of woodlot management. Though woodlots are perceived to provide significant environmental functions, restrictions regarding harvesting high value products are limiting the potential for smallholder income diversification and empowerment, two critical components of poverty alleviation in Ethiopia.
Rationality and Poincare families for vector bundles with extra structure on a curve
Creators: name: Hoffmann, Norbert
Publisher: name: arXiv
Year: 2005
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14H60 (Primary) 14E08 (Secondary)

description: Iterated Grassmannian bundles over moduli stacks of vector bundles on a curve are shown to be birational to an affine space times a moduli stack of degree 0 vector bundles, following the method of King and Schofield. Applications include the birational type of some Brill-Noether loci, of moduli schemes for vector bundles with parabolic structure or with level structure and for A. Schmitt's decorated vector bundles. A further consequence concerns the existence of Poincare families on finite coverings of the moduli schemes.
description: 19 pages AMSLaTeX
Conflitos agrários no Médio São Francisco: a comunidade Retiro da Picada no rastro da memória (1975-1989)
Creators: name: Oliveira, Júlio Ernesto Souza De
Publisher: name: Zenodo
Year: 2017
Subjects: Grilagem de terras
Luta pela terra
Ditadura civil-militar
Médio São Francisco

description: O presente trabalho se propõe a investigar os conflitos agrários decorrentes da grilagem de terras,ocorridos na região do Médio São Francisco (Bahia), durante a ditadura civil-militar. Especificamente,temos como espaço a comunidade de Retiro da Picada (Xique-Xique), e cronologia o período de 1975 a 1989. Nosso objeto se delineia através de uma série de conflitos entre a família Bittencourt Mariani e os posseiros da dita comunidade, havendo conflitos entre as partes desde a década de 1960 –intensificaram-se a partir de 1975. O ápice se deu em 1979, quando Antônio Bittencourt Mariani, na pessoa de Medeiros de Sá (Umbuzeiro Agropecuária Ltda. - empresa instalada na fazenda) – faço uso de pseudônimo –, mandou cerca de seis homens armados incendiarem a comunidade, causando a morte de algumas crianças e, no somatório dos conflitos, de dois homens adultos. O caso gerou grande repercussão, sobretudo em jornais, além das Atas da CPI da Grilagem – acompanhada pela AATR-BA (Associação dos Advogados dos Trabalhadores Rurais – Seção Bahia) –, e nos relatórios de acompanhamento técnico da FUNDIFRAN (Fundação de Desenvolvimento Integrado do São Francisco) – entidade que desde 1971 acompanha e presta assistência técnica aos assentamentos e comunidades rurais do Médio São Francisco. Esse processo veio a se findar, judicialmente, em 1989,por meio de um acordo entre a família Bittencourt Mariani e os posseiros. Finalmente, esta pesquisa se encontra, sob o ponto de vista teórico, num limiar entre a história agrária e a história política, tendo a categoria de mandonismo como hipótese ao fenômeno estudado.
ВЛИЯНИЕ РАЗЛИЧНЫХ ФАКТОРОВ НА ЛИМФОИДНЫЕ СТРУКТУРЫ СЕЛЕЗЕНКИ
Creators: name: Махмудова, Гулжамол
Publisher: name: Zenodo
Year: 2024

description: Начиная с полового созревания, иммунологические изменения в селезенке приобретают инволюционный характер, который поражает ладонь, лимфатические узелки и пограничные области и проявляется гипоплазией и отграничением белой пульпы. Относительная площадь V - зон белой пульпы селезенки увеличивается, о чем свидетельствует активация миграции Т- и V-лимфоцитов. Это обеспечивает стабильность иммунного состояния при начальном старении организма.
Entanglement Detection in the Stabilizer Formalism
Creators: name: Toth, Geza
name: Guehne, Otfried
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate how stabilizer theory can be used for constructing sufficient conditions for entanglement. First, we show how entanglement witnesses can be derived for a given state, provided some stabilizing operators of the state are known. These witnesses require only a small effort for an experimental implementation and are robust against noise. Second, we demonstrate that also nonlinear criteria based on uncertainty relations can be derived from stabilizing operators. These criteria can sometimes improve the witnesses by adding nonlinear correction terms. All our criteria detect states close to Greenberger-Horne-Zeilinger states, cluster and graph states. We show that similar ideas can be used to derive entanglement conditions for states which do not fit the stabilizer formalism, such as the three-qubit W state. We also discuss connections between the witnesses and some Bell inequalities.
description: 15 pages including 2 figures, revtex4; typos corrected, presentation improved; to appear in PRA
AGROECOLOGICAL ASPECTS OF EVALUATING AGRICULTURAL R&D
Creators: name: Wood, Stanley
name: Pardey, Philip G.
name: Wood, Stanley
name: Pardey, Philip G.
Publisher: name: Unknown
Year: 1997
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: Biophysical
subject: Economic evaluation
subject: Research priorities

description: In this paper we describe how biophysical data can be used, in conjunction with agroecological concepts and multimarket economic models, to systematically evaluate the effects of agricultural R&D in ways that inform research priority setting and resource-allocation decisions. Agroecological zones can be devised to help estimate the varying, site-specific responses to new agricultural technologies and to evaluate the potential for research to spill over from one agroecological zone to another. The application of agroecological zonation procedures in an international, agricultural research context is given special attention.
Stretched quantum membranes
Creators: name: Bjornsson, Jonas
name: Hwang, Stephen
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study bosonic and space-time supersymmetric membranes with small tensions corresponding to stretched configurations. Using a generalized lightcone gauge, one may set up a perturbation theory around configurations having zero tension. We will show, by explicit construction to all orders in perturbation theory, that these membrane configurations are canonically equivalent, and thereby solvable, to string-like configurations with string excitations transverse to the stretched direction. At the quantum level, it is shown that there exists an ordering such that equivalence by unitary transformations is achieved. Consistency requires the critical dimensions 27 and 11 for the bosonic and supersymmetric cases, respectively. The mass spectrum is determined to any order. It is discrete and contains massless exitations. The ground state is purely string-like, whereas excited string-like states split through the perturbation into an infinite set of states with equal or lower energies.
description: 36 pages; reference added; typo's corrected; clarification of eq. (3.19) and implications of this
Magnetic-field-induced reorientation in the SDW and the spin-stripe phases of the frustrated spin-1/2 chain compound $β$-TeVO$_4$
Creators: name: Herak, M.
name: Novosel, N.
name: Dragičević, M.
name: Guizouarn, Thierry
name: Cador, Olivier
name: Berger, Helmuth
name: Pregelj, Matej
name: Zorko, Andrej
name: Arčon, Denis
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: $β$-TeVO$_4$ is a frustrated spin 1/2 zig-zag chain system,where spin-density-wave (SDW), vector chiral (VC)and an exotic dynamic spin-stripe phase compete at low temperatures. Here we use torque magnetometry to study the anisotropy of these phases in magnetic fields of up to 5 T. Our results show that the magnetic-field-induced spin reorientation occurs in the SDW and in the spin stripe phases for $μ_0 H \geq 2$~T. The observed spin reorientation is a new element of the anisotropic phase diagram for the field directions in the $ac$ and $a^*b$ crystallographic planes. The presented results should help establishing the model of anisotropic magnetic interactions, which are responsible for the formation of complex magnetic phases in $β$-TeVO$_4$ and similar quantum systems.
description: Accepted for publication in Physical Review B
POPULATION PRESSURE AND THE MICROECONOMY OF LAND MANAGEMENT IN HILLS AND MOUNTAINS OF DEVELOPING COUNTRIES
Creators: name: Templeton, Scott R.
name: Scherr, Sara J.
name: Templeton, Scott R.
name: Scherr, Sara J.
Publisher: name: Unknown
Year: 1997
Subjects: Land Economics/Use

description: Concerns about harmful environmental impacts are frequently raised in research and policy debates about population growth in the hills and mountains of developing countries. Although establishing wildlife corridors and biosphere reserves is important for preserving selected biodiverse habitats, for the vast majority of hilly-mountainous lands, the major ecological concerns are for the sustainability of local production systems and for watershed integrity. What matters for sustained use of those lands not only is the number of producers but also what, where and how they produce. Indeed, comprehensive evidence from empirical research indicates that population growth in hills and mountains can lead to land enhancement, degradation, or aspects of both. The evidence can be explained by extending induced innovation theory to address environmental impacts of intensification. Increases in the labor-land endowment ratios of households and in local land demand and labor supply make the opportunity cost of land relative to labor increase. As a result, people use hilly-mountainous land resources more intensively for production and consumption, thus tending to deplete resources and significantly alter habitats. But, at the same time, capital- and labor-intensive methods of replenishing or improving soil productivity may become economically more attractive, especially where specific property rights develop. Users will choose production systems that enhance the land if the expected discounted returns are greater than those of systems that degrade the land. In addition to population change, other factors—market conditions, local institutions and organizations, information and technology about resource management, and local ecological conditions—determine the returns from various production systems. Theoretical arguments and empirical evidence about these other determinants of land-improving investment and management are examined. The challenge to researchers and policymakers is to help to configure microeconomic incentives for production that enhance both the land and the welfare of people in these areas.
Magnetic susceptibility of a CuO2 plane in the La2CuO4 system: I. RPA treatment of the Dzyaloshinskii-Moriya Interactions
Creators: name: Tabunshchyk, K. V.
name: Gooding, R. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Motivated by recent experiments on undoped La2CuO4, which found pronounced temperature-dependent anisotropies in the low-field magnetic susceptibility, we have investigated a two-dimensional square lattice of S=1/2 spins that interact via Heisenberg exchange plus the symmetric and anti-symmetric Dzyaloshinskii-Moriya anisotropies. We describe the transition to a state with long-ranged order, and find the spin-wave excitations, with a mean-field theory, linear spin-wave analysis, and using Tyablikov's RPA decoupling scheme. We find the different components of the susceptibility within all of these approximations, both below and above the N'eel temperature, and obtain evidence of strong quantum fluctuations and spin-wave interactions in a broad temperature region near the transition.
description: 20 pages, 2 column format, 22 figures
Grizzly bear use of avalanche chutes in the Columbia Mountains, British Columbia
Creators: name: Ramcharita, Roger Karim
Publisher: name: University of British Columbia
Year: 2009

description: I examined spring season use of avalanche chutes by grizzly bears (Ursus arctos L.) in the Columbia Mountains, southeastern British Columbia. Sixty radio-collared grizzly bears were monitored between 1994 and 1998. The frequency of avalanche chute use, the selection of general habitat characteristics within avalanche chutes, and the selection of specific feeding and bedding sites within avalanche chutes by grizzly bears were documented. Fifty-four percent (366/672) of all grizzly bear radio-locations during the spring season (May 1 to July 31) were in avalanche chutes. The proportion of radio-locations in avalanche chutes for the 37 grizzly bears that accounted for > 10 spring season radiolocations each ranged between 20% and 90% (x = 56% ± 18% [mean ± SD]). This variation was not attributable to differences in use between sex or age classes. Within avalanche chutes, grizzly bears selected east and south aspects and areas dominated by grasses and forbs with minimal shrub abundance. Grizzly bears avoided very steep slopes but used all elevational parts of avalanche chutes - upper start zones, tracks, and lower runout zones. These patterns appeared to be tied to feeding site selection, because evidence of feeding was found at most telemetry locations investigated on the ground. Grizzly bears selected feeding sites on the basis of forage value and visual cover. Most feeding sites were characterized by high forage value and low visual cover, but weak positive interaction between these two factors indicated that grizzly bears also selected feeding sites with slightly lower forage values but high visual cover. Bed sites were found both in forest adjacent to avalanche chutes and directly within avalanche chutes. All bed sites found in forests adjacent to avalanche chutes were < 25 m from the forest / avalanche chute edge. The impact on grizzly bear use of avalanche chutes by two timber harvest activities was also examined. Grizzly bears avoided areas within avalanche chutes that were adjacent to cutblocks, possibly due to the removal of escape cover. In contrast, grizzly bears selected areas close to logging roads. Most logging roads traversing avalanche chutes in the study area had minimal vehicle traffic and were often situated close to areas with abundant food resources. I present suggestions for managing this important spring season habitat for grizzly bears.
WHY DO PROJECTIONS ON CHINA'S FUTURE FOOD SUPPLY AND DEMAND DIFFER?
Creators: name: Fan, Shenggen
name: Agcaoili-Sombilla, Mercedita C.
name: Fan, Shenggen
name: Agcaoili-Sombilla, Mercedita C.
Publisher: name: Unknown
Year: 1997
Subjects: Food Security and Poverty

description: This paper analyzes the macroeconomic assumptions, demand and supply parameters, and structures of the models used in projecting China’s future food supply, demand, and trade. Projections from these models vary greatly, from China being almost self-sufficient in grain to becoming a net importer of 369 million metric tons of grain in 2030. The differences arrive mainly in the supply projections (the combined effect of land decline and yield growth). The paper also suggests methodology improvements needed in making future projections of China’s grain economy, such as endogenizing government policies, and taking into account the linkage between the agricultural with the non-agricultural sectors, technical change in livestock industry, and infrastructure constraints on grain imports.
Effects of optical lattices on bright solitons in spin-orbit coupled Bose-Einstein condensates
Creators: name: Sekh, Golam Ali
name: Talukdar, Benoy
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The stationary bright solitons that appear in the ground state of the spin-orbit coupled Bose-Einstein condensate (SOC-BEC) exhibit nodes. We consider SOC-BEC in combined linear and nonlinear optical lattices and study their effects on the matter-wave bright soliton and find that the parameters of the nonlinear lattice or atomic scattering length can be judiciously manipulated to have useful control over the nodes of the soliton. It is seen that the soliton with large number of nodes is less stable compared to one having fewer number of nodes. We infer that that the synthetic spin-orbit coupling induces instability in the ordinary matter-wave soliton.
description: 7 pages, 6 figures
ALTERNATIVE GROWTH SCENARIOS FOR UGANDAN COFFEE TO 2020
Creators: name: You, Liangzhi
name: Bolwig, Simon
name: You, Liangzhi
name: Bolwig, Simon
Publisher: name: Unknown
Year: 2003
Subjects: subject: Crop Production/Industries
subject: coffee production
subject: commodity exports
subject: quality
subject: DREAM
subject: development strategy evaluation
subject: producer benefits
subject: Uganda

description: Coffee is the most important export crop in Uganda and an important source of income among smallholder farmers in large parts of the country. The Robusta type dominates coffee production and Ugandan Robusta is demanded by roasters as a component in certain blends due to its special taste qualities. However, a combination of events outside and within Uganda, especially the collapse of world coffee prices in the late 1990s, are eroding farmer incomes and export revenues and threaten the long-term viability of the industry. In this context, the paper first investigates the challenges faced by the Ugandan coffee industry, namely the decline in the world coffee market, changes in procurement strategies among coffee importers, the rapidly expanding market for high quality and specialty coffees, and the spread of the coffee wilt disease and other farm-level productivity constraints. This leads us to examine possible development strategies for Ugandan coffee production: area expansion, quality improvement, and productivity increase. Using IFPRI's Dynamic Research Evaluation for Management (DREAM) model, different scenarios for each of these strategies are evaluated to show their potential impacts on Ugandan export prices, export revenues, and producer benefits. The simulation results show that Uganda would benefit relatively more by enhancing farm productivity and improving coffee quality. The economic benefits of increasing production through area expansion, on the other hand, would be significantly eroded by the negative effects on export prices, especially if other countries followed suit and accelerated their own growth in coffee production. These analyses focus on the potential benefits of alternate changes in Ugandan coffee production, while devoting less attention to how and at what costs such changes may be effected. Finally, it is suggested that because the world coffee market is so important to the Ugandan economy, and being the third biggest Robusta producer in the world, Uganda has a high stake and important role to play in international coordination efforts to raise and stabilize world coffee prices.
Numerical analysis of backreaction in acoustic black holes
Creators: name: Balbinot, Roberto
name: Fabbri, Alessandro
name: Fagnocchi, Serena
name: Nagar, Alessandro
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using methods of Quantum Field Theory in curved spacetime, the first order in hbar quantum corrections to the motion of a fluid in an acoustic black hole configuration are numerically computed. These corrections arise from the non linear backreaction of the emitted phonons. Time dependent (isolated system) and equilibrium configurations (hole in a sonic cavity) are both analyzed.
description: 7 pages, 5 figures
Direct Catalytic Hydrogenation of Bioethanol-from-Sugarcane Bagasse Effluents over Ru/C Catalyst: An Eco-Efficient Environmentally-Friendly Approach
Creators: name: Carrasco, Cristhian
Publisher: name: figshare
Year: 2021
Subjects: subject: 90499 Chemical Engineering not elsewhere classified
subject: FOS: Chemical engineering
subject: 90403 Chemical Engineering Design

description: Conventional processes for production of bioethanol from sugarcane bagasse generate a xylose-rich solution as liquid effluents. Xylose can be converted by catalytic hydrogenation into xylitol, a high valued natural sweetener used in the food industry. Traditionally, nickel catalysts are employed in the production of xylitol on industrial scale. Nevertheless, these catalysts usually undergo a severe deactivation, due to the blockage of their active sites by fouling species generated in the xylose production. Ru/C catalysts have emerged as an option regarding the hydrogenation of the non-purified xylose, in terms of activity, selectivity and stability. In this work, xylose-rich sugarcane bagasse hydrolysate was hydrogenated over Ru 2%/C catalyst. Experiments performed under moderate temperatures and catalyst loadings presented xylose conversions higher than 85%. Ru 2%/C appears as a feasible catalyst system to be used in the direct catalytic hydrogenation of xylose-rich sugarcane bagasse hydrolysates. Nevertheless, some catalyst deactivation was observed after consecutive runs, possibly resulting of chemisorption of foulant species existing in the hydrolysate on the catalyst active sites
Abundance matching tested on small scales with galaxy dynamics
Creators: name: Macciò, Andrea V.
name: Courteau, Stephane
name: Ouellette, Nathalie N. -Q.
name: Dutton, Aaron A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a comprehensive test of the relation between stellar and total mass in galaxies as predicted by popular models based on abundance matching (AM) techniques. We use the ``Spectroscopy and H-band Imaging of Virgo cluster galaxies'' (SHIVir) survey with photometric and dynamical profiles for 190 Virgo cluster galaxies to establish a relation between the stellar and dynamical masses measured within the isophotal radius $r_{23.5}$. Various dark matter and galaxy scaling relations are combined with results from the NIHAO suite of hydrodynamical simulations to recast AM predictions in terms of these observed quantities. Our results are quite insensitive to the exact choice of dark matter profile and halo response to baryon collapse. We find that theoretical models reproduce the slope and normalization of the observed stellar-to-halo mass relation (SHMR) over more than three orders of magnitude in stellar mass $(10^8 < M_*/M_{\odot} < 2 \times 10^{11})$. However, the scatter of the observed SHMR exceeds that of AM predictions by a factor $\sim$5. For systems with stellar masses exceeding $5 \times 10^{10}~M_{\odot}$, AM overpredicts the observed stellar masses for a given dynamical mass. The latter offset may support previous indications of a different stellar initial mass function in these massive galaxies. Overall our results support the validity of AM predictions on a wide dynamical range.
description: 5 pages, 4 figures, accepted for publication in MNRAS Letters
MAUIL: Multi-level Attribute Embedding for Semi-supervised User Identity Linkage
Creators: name: Chen, Baiyang
name: Chen, Xiaoliang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences
subject: G.3; H.2.8

description: User identity linkage (UIL) across social networks has recently attracted an increasing amount of attention due to its significant research challenges and practical value. Most of the existing methods use a single method to express different types of attribute features. However, the simplex pattern can neither cover the entire set of different attribute features nor capture the higher-level semantic features in the attribute text. This paper establishes a novel semisupervised model, namely the multilevel attribute embedding for semisupervised user identity linkage (MAUIL), to seek the common user identity across social networks. MAUIL includes two components: multilevel attribute embedding and regularized canonical correlation analysis (RCCA)-based linear projection. Specifically, the text attributes for each network are first divided into three types: character-level, word-level, and topic-level attributes. Second, unsupervised approaches are employed to extract the corresponding three types of text attribute features, and user relationships are embedded as a complimentary feature. All the resultant features are combined to form the final representation of each user. Finally, target social networks are projected into a common correlated space by RCCA with the help of a small number of prematched user pairs. We demonstrate the superiority of the proposed method over state-of-the-art methods through extensive experiments on two real-world datasets.
description: Accepted by Information Sciences in Feb. 2022
A non-unimodal codimension 3 level $h$-vector
Creators: name: Zanello, Fabrizio
Publisher: name: arXiv
Year: 2005
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13E10 (primary); 13D40,13H10 (secondary)

description: $(1,3,6,10,15,21,28,27,27,28)$ is a level $h$-vector! This example answers negatively the open question as to whether all codimension 3 level $h$-vectors are unimodal. Moreover, using the same (simple) technique, we are able to construct level algebras of codimension 3 whose $h$-vectors have exactly $N$ ` ` maxima", for any positive integer $N$. These non-unimodal $h$-vectors, in particular, provide examples of codimension 3 level algebras not enjoying the Weak Lefschetz Property (WLP). Their existence was also an open problem before. In the second part of the paper we further investigate this fundamental property, and show that there even exist codimension 3 level algebras of type 3 without the WLP.
description: 12 pages, a few minor changes. To appear in the J. of Algebra
On explicit estimates for $S(t)$, $S_1(t)$, and $ζ(1/2+\mathrm{i}t)$ under the Riemann Hypothesis
Creators: name: Simonič, Aleksander
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11M26

description: Assuming the Riemann Hypothesis, we provide explicit upper bounds for moduli of $S(t)$, $S_1(t)$, and $ζ\left(1/2+\mathrm{i}t\right)$ while comparing them with recently proven unconditional ones. As a corollary we obtain a conditional explicit bound on gaps between consecutive zeros of the Riemann zeta-function.
description: 21 pages
ANIMAL HEALTH AND THE ROLE OF COMMUNITIES: AN EXAMPLE OF TRYPANASOMOSIS CONTROL OPTIONS IN UGANDA
Creators: name: McCarthy, Nancy
name: McDermott, John
name: Coleman, Paul
name: McCarthy, Nancy
name: McDermott, John
name: Coleman, Paul
Publisher: name: Unknown
Year: 2003
Subjects: subject: Livestock Production/Industries
subject: Public Goods
subject: Collective Action
subject: Vector-Borne Disease

description: In many African countries, governments are re-thinking the role of the state in centrally providing certain goods and services. The rights and responsibilities for providing various public goods are being decentralized to lower levels of government administration, and/or being devolved directly to local citizens or user groups themselves. It is thus critical to ask: under what circumstances will local groups provide the socially optimal level of the public good? In this paper, we apply this question to the case of controlling an important vector-borne livestock disease in Uganda, trypanosomosis, which is transmitted by the tsetse fly. We investigate the underlying epidemiology of transmission and different options for control, and the implications for group provision of control, within the framework of a game-theoretic model. Results indicate that individual incentives to uptake tsetse and trypanosomosis control differ widely across different control methods. Since the costs of successfully implementing collective action are affected by individual incentives to participate in collective action, the model predicts which method/s are likely to be successfully implemented at the community level. More broadly, the model highlights under what circumstances community-provision is not likely to be optimal, depending on the underlying epidemiology of the disease, technological parameters, prevailing market characteristics, and socio-cultural conditions.
Short-time dynamics of a family of XY noncollinear magnets
Creators: name: Bekhechi, S.
name: Southern, B. W.
name: Peles, A.
name: Mouhanna, D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Critical scaling and universality in the short-time dynamics for antiferromagnetic models on a three-dimensional stacked triangular lattice are investigated using Monte Carlo simulation. We have determined the critical point by searching for the best power law for the order parameter as a function of time and measured the critical exponents. Our results indicate that it is possible to distinguish weak first-order from second-order phase transitions and confirm that XY antiferromagnetic systems undergo a (weak) first order phase transition.
description: 4 pages, 6 figures, largely revised version
Does telomere elongation lead to a longer lifespan if cancer is considered?
Creators: name: Masa, Michael
name: Cebrat, Stanislaw
name: Stauffer, Dietrich
Publisher: name: arXiv
Year: 2005
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: As cell proliferation is limited due to the loss of telomere repeats in DNA of normal somatic cells during division, telomere attrition can possibly play an important role in determining the maximum life span of organisms as well as contribute to the process of biological ageing. With computer simulations of cell culture development in organisms, which consist of tissues of normal somatic cells with finite growth, we otain an increase of life span and life expectancy for longer telomeric DNA in the zygote. By additionally considering a two-mutation model for carcinogenesis and indefinite proliferation by the activation of telomerase, we demonstrate that the risk of dying due to cancer can outweigh the positive effect of longer telomeres on the longevity.
description: 9 pages including 5 figures
Untitled Item
Creators: name: Carrasco, Cristhian
Publisher: name: figshare
Year: 2021
Subjects: subject: 90499 Chemical Engineering not elsewhere classified
subject: FOS: Chemical engineering
subject: 90403 Chemical Engineering Design

description: Conventional processes for production of bioethanol from sugarcane bagasse generate a xylose-rich solution as liquid effluents. Xylose can be converted by catalytic hydrogenation into xylitol, a high valued natural sweetener used in the food industry. Traditionally, nickel catalysts are employed in the production of xylitol on industrial scale. Nevertheless, these catalysts usually undergo a severe deactivation, due to the blockage of their active sites by fouling species generated in the xylose production. Ru/C catalysts have emerged as an option regarding the hydrogenation of the non-purified xylose, in terms of activity, selectivity and stability. In this work, xylose-rich sugarcane bagasse hydrolysate was hydrogenated over Ru 2%/C catalyst. Experiments performed under moderate temperatures and catalyst loadings presented xylose conversions higher than 85%. Ru 2%/C appears as a feasible catalyst system to be used in the direct catalytic hydrogenation of xylose-rich sugarcane bagasse hydrolysates. Nevertheless, some catalyst deactivation was observed after consecutive runs, possibly resulting of chemisorption of foulant species existing in the hydrolysate on the catalyst active sites
GROWTH AND POVERTY IN RURAL CHINA: THE ROLE OF PUBLIC INVESTMENTS
Creators: name: Fan, Shenggen
name: Zhang, Linxiu
name: Zhang, Xiaobo
name: Fan, Shenggen
name: Zhang, Linxiu
name: Zhang, Xiaobo
Publisher: name: Unknown
Year: 2000
Subjects: Public Economics

description: Public investment, together with institutional and policy reforms, has contributed substantially to rapid economic growth in rural China since the late 1970s. This rapid growth has also led to dramatic reductions in rural poverty. In this study we use a simultaneous equations model and time-series (1978-97), cross-sectional (25 provinces) data to analyze the differential impact of different types of public investments on growth and poverty reduction in rural China. The results show that government expenditures on education have by far the largest impact on poverty reduction, and the second largest impact on production growth; it is a dominant “win-win” strategy. Government spending on agricultural research and extension has the largest impact on agricultural growth, and the third largest impact on poverty reduction. It is another win-win strategy. The next best investment is rural telecommunications, which gives the second largest impact on poverty reduction and the third largest impact on agricultural growth. The results also show that there are regional tradeoffs in achieving growth and poverty alleviation goals. If the government wishes to maximize its poverty reduction effects, then investments should be targeted to the western region. However, the sacrifice in growth by investing more in the western region is small. But, the government wishes to maximize the returns to growth in agricultural production, then it should definitely target the central region.
Probing the high-z IGM with the hyperfine transition of $^3$He$^+$
Creators: name: Khullar, Shivan
name: Ma, Qingbo
name: Busch, Philipp
name: Ciardi, Benedetta
name: Eide, Marius B.
name: Kakiichi, Koki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The hyperfine transition of $^3$He$^+$ at 3.5cm has been thought as a probe of the high-z IGM since it offers a unique insight into the evolution of the helium component of the gas, as well as potentially give an independent constraint on the 21cm signal from neutral hydrogen. In this paper, we use radiative transfer simulations of reionization driven by sources such as stars, X-ray binaries, accreting black holes and shock heated interstellar medium, and simulations of a high-z quasar to characterize the signal and analyze its prospects of detection. We find that the peak of the signal lies in the range 1-50 $μ$K for both environments, but while around the quasar it is always in emission, in the case of cosmic reionization a brief period of absorption is expected. As the evolution of HeII is determined by stars, we find that it is not possible to distinguish reionization histories driven by more energetic sources. On the other hand, while a bright QSO produces a signal in 21cm that is very similar to the one from a large collection of galaxies, its signature in 3.5cm is very peculiar and could be a powerful probe to identify the presence of the QSO. We analyze the prospects of the signal's detectability using SKA1-mid as our reference telescope. We find that the noise power spectrum dominates over the power spectrum of the signal, although a modest S/N ratio can be obtained when the wavenumber bin width and the survey volume are sufficiently large.
description: 10 pages, 13 figures, accepted for publication in MNRAS
Non-perturbative renormalization of the axial current with dynamical Wilson fermions
Creators: name: Della Morte, Michele
name: Hoffmann, Roland
name: Knechtli, Francesco
name: Sommer, Rainer
name: Wolff, Ulli
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present a new normalization condition for the axial current, derived from the PCAC relation with non-vanishing quark mass. This condition is expected to reduce mass effects in the chiral extrapolation of the results for the normalization factor Z_A. The application to the two-flavor theory with improved Wilson fermions shows that this expectation is indeed fulfilled. Using the Schroedinger functional setup we calculate Z_A(g_0^2) as well as the vector current normalization factor Z_V(g_0^2) for beta = 6/g_0^2 >= 5.2.
description: 15 pages, 4 figures, 2 tables, JHEP style
Interactions of Domain Walls of SUSY Yang-Mills as D-Branes
Creators: name: Armoni, Adi
name: Hollowood, Timothy J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Domain walls in supersymmetric Yang-Mills are BPS configurations which preserve two supercharges of the parent theory and so their tensions are known exactly. On the other hand, they have been described as D-branes for the confining string. This leads to a description of their collective dynamics in terms of a 2+1 -dimensional gauge theory with two supersymmetries and a Chern-Simons term. We show that this open string description can capture the qualitative behaviour of the forces between the domain walls for an arbitrary configuration of n walls at leading order in 1/N, extending earlier calculations for two walls. The potential admits a supersymmetric bound state when the n walls are all coincident and asymptotes to a constant at large separation with an n dependence which agrees perfectly with the exact tension formula.
description: 9 pages, 1 figure
Experimental relativistic zero-knowledge proofs
Creators: name: Alikhani, Pouriya
name: Brunner, Nicolas
name: Crépeau, Claude
name: Designolle, Sébastien
name: Houlmann, Raphaël
name: Shi, Weixu
name: Yang, Nan
name: Zbinden, Hugo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Protecting secrets is a key challenge in our contemporary information-based era. In common situations, however, revealing secrets appears unavoidable, for instance, when identifying oneself in a bank to retrieve money. In turn, this may have highly undesirable consequences in the unlikely, yet not unrealistic, case where the bank's security gets compromised. This naturally raises the question of whether disclosing secrets is fundamentally necessary for identifying oneself, or more generally for proving a statement to be correct. Developments in computer science provide an elegant solution via the concept of zero-knowledge proofs: a prover can convince a verifier of the validity of a certain statement without facilitating the elaboration of a proof at all. In this work, we report the experimental realisation of such a zero-knowledge protocol involving two separated verifier-prover pairs. Security is enforced via the physical principle of special relativity, and no computational assumption (such as the existence of one-way functions) is required. Our implementation exclusively relies on off-the-shelf equipment and works at both short (60 m) and long distances ($\geqslant$400 m) in about one second. This demonstrates the practical potential of multi-prover zero-knowledge protocols, promising for identification tasks and blockchain applications such as cryptocurrencies or smart contracts.
description: 8 pages, 3 figures
Transverse Evolution Operator for the Gross-Pitaevskii Equation in Semiclassical Approximation
Creators: name: Borisov, Alexey
name: Shapovalov, Alexander
name: Trifonov, Andrey
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The Gross-Pitaevskii equation with a local cubic nonlinearity that describes a many-dimensional system in an external field is considered in the framework of the complex WKB-Maslov method. Analytic asymptotic solutions are constructed in semiclassical approximation in a small parameter $\hbar$, $\hbar\to 0$, in the class of functions concentrated in the neighborhood of an unclosed surface associated with the phase curve that describes the evolution of surface vertex. The functions of this class are of the one-soliton form along the direction of the surface normal. The general constructions are illustrated by examples.
description: Published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Barauna, Guilherme: Die Kirche in der Welt von heute
Creators: name: Lefringhausen, Klaus
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 17 Nr. 1 (1968): Ökumenische Rundschau, Band 17, Heft 1