cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Transverse Mode Instability
Creators: name: Jauregui, Cesar
name: Stihler, Christoph
name: Limpert, Jens
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: This work presents a review on the effect of transverse mode instability in high-power fiber laser systems and the corresponding investigations led worldwide over the last decade. This manuscript includes the description of the experimental observations, the physical origin of this effect, as well as some of the proposed mitigation strategies.
description: (c) 2020 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited
Two-stage dimensional emotion recognition by fusing predictions of acoustic and text networks using SVM
Creators: name: Atmaja, Bagus Tris
name: Akagi, Masato
Publisher: name: arXiv
Year: 2022
Subjects: subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Automatic speech emotion recognition (SER) by a computer is a critical component for more natural human-machine interaction. As in human-human interaction, the capability to perceive emotion correctly is essential to take further steps in a particular situation. One issue in SER is whether it is necessary to combine acoustic features with other data such as facial expressions, text, and motion capture. This research proposes to combine acoustic and text information by applying a late-fusion approach consisting of two steps. First, acoustic and text features are trained separately in deep learning systems. Second, the prediction results from the deep learning systems are fed into a support vector machine (SVM) to predict the final regression score. Furthermore, the task in this research is dimensional emotion modeling because it can enable a deeper analysis of affective states. Experimental results show that this two-stage, late-fusion approach, obtains higher performance than that of any one-stage processing, with a linear correlation from one-stage to two-stage processing. This late-fusion approach improves previous early fusion results measured in concordance correlation coefficients score.
description: Published in Speech Communications
Well-centered overrings of an integral domain
Creators: name: Heinzer, William
name: Roitman, Moshe
Publisher: name: arXiv
Year: 2003
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13A15, 13B30, 13G05

description: Let A be an integral domain with field of fractions K. We investigate the structure of the overrings B of A (contained in K) that are well-centered on A in the sense that each principal ideal of B is generated by an element of A. We consider the relation of well-centeredness to the properties of flatness, localization and sublocalization for B over A. If B = A[b] is a simple extension of A, we prove that B is a localization of A if and only if B is flat and well-centered over A. If the integral closure of A is a Krull domain, in particular, if A is Noetherian, we prove that every finitely generated flat well-centered overring of A is a localization of A. We present examples of (non-finitely generated) flat well-centered overrings of a Dedekind domain that are not localizations.
description: Example 3.11 was replaced
Ordered phases of XXZ-symmetric spin-1/2 zigzag ladder
Creators: name: Zarea, M.
name: Fabrizio, M.
name: Nersesyan, A. A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Using bosonization approach, we derive an effective low-energy theory for XXZ-symmetric spin-1/2 zigzag ladders and discuss its phase diagram by a variational approach. A spin nematic phase emerges in a wide part of the phase diagram, either critical or massive. Possible crossovers between the spontaneously dimerized and spin nematic phases are discussed, and the topological excitations in all phases identified.
description: 14 pages, 3 figures. submitted to The European Physical Journal B
Quantum Algorithms for Deep Convolutional Neural Networks
Creators: name: Kerenidis, Iordanis
name: Landman, Jonas
name: Prakash, Anupam
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: Emerging Technologies (cs.ET)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Quantum computing is a new computational paradigm that promises applications in several fields, including machine learning. In the last decade, deep learning, and in particular Convolutional neural networks (CNN), have become essential for applications in signal processing and image recognition. Quantum deep learning, however remains a challenging problem, as it is difficult to implement non linearities with quantum unitaries. In this paper we propose a quantum algorithm for applying and training deep convolutional neural networks with a potential speedup. The quantum CNN (QCNN) is a shallow circuit, reproducing completely the classical CNN, by allowing non linearities and pooling operations. The QCNN is particularly interesting for deep networks and could allow new frontiers in image recognition, by using more or larger convolution kernels, larger or deeper inputs. We introduce a new quantum tomography algorithm with $\ell_{\infty}$ norm guarantees, and new applications of probabilistic sampling in the context of information processing. We also present numerical simulations for the classification of the MNIST dataset to provide practical evidence for the efficiency of the QCNN.
Multifractal statistics of Lagrangian velocity and acceleration in turbulence
Creators: name: Biferale, L.
name: Boffetta, G.
name: Celani, A.
name: Devenish, B. J.
name: Lanotte, A.
name: Toschi, F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The statistical properties of velocity and acceleration fields along the trajectories of fluid particles transported by a fully developed turbulent flow are investigated by means of high resolution direct numerical simulations. We present results for Lagrangian velocity structure functions, the acceleration probability density function and the acceleration variance conditioned on the instantaneous velocity. These are compared with predictions of the multifractal formalism and its merits and limitations are discussed.
description: 4 pages, 3 figures
Visually Improved Erosion Algorithm for the Procedural Generation of Tile-based Terrain
Creators: name: Lim, Fong Yuan
name: Tan, Yu Wei
name: Bhojan, Anand
Publisher: name: arXiv
Year: 2022
Subjects: subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences
subject: I.3.5

description: Procedural terrain generation is the process of generating a digital representation of terrain using a computer program or procedure, with little to no human guidance. This paper proposes a procedural terrain generation algorithm based on a graph representation of fluvial erosion that offers several novel improvements over existing algorithms. Namely, the use of a height constraint map with two types of locally defined constraint strengths; the ability to specify a realistic erosion strength via level of rainfall; and the ability to carve realistic gorges. These novelties allow it to generate more varied and realistic terrain by integrating additional parameters and simulation processes, while being faster and offering more flexibility and ease of use to terrain designers due to the nature and intuitiveness of these new parameters and processes. This paper additionally reviews some common metrics used to evaluate terrain generators, and suggests a completely new one that contributes to a more holistic evaluation.
Chaos and the continuum limit in nonneutral plasmas and charged particle beams
Creators: name: Kandrup, Henry E.
name: Sideris, Ioannis V.
name: Bohn, Courtlandt L.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Astrophysics (astro-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: This paper examines discreteness effects in nearly collisionless N-body systems of charged particles interacting via an unscreened r^-2 force, allowing for bulk potentials admitting both regular and chaotic orbits. Both for ensembles and individual orbits, as N increases there is a smooth convergence towards a continuum limit. Discreteness effects are well modeled by Gaussian white noise with relaxation time t_R = const * (N/log L)t_D, with L the Coulomb logarithm and t_D the dynamical time scale. Discreteness effects accelerate emittance growth for initially localised clumps. However, even allowing for discreteness effects one can distinguish between orbits which, in the continuum limit, feel a regular potential, so that emittance grows as a power law in time, and chaotic orbits, where emittance grows exponentially. For sufficiently large N, one can distinguish two different `kinds' of chaos. Short range microchaos, associated with close encounters between charges, is a generic feature, yielding large positive Lyapunov exponents X_N which do not decrease with increasing N even if the bulk potential is integrable. Alternatively, there is the possibility of larger scale macrochaos, characterised by smaller Lyapunov exponents X_S, which is present only if the bulk potential is chaotic. Conventional computations of Lyapunov exponents probe X_N, leading to the oxymoronic conclusion that N-body orbits which look nearly regular and have sharply peaked Fourier spectra are `very chaotic.' However, the `range' of the microchaos, set by the typical interparticle spacing, decreases as N increases, so that, for large N, this microchaos, albeit very strong, is largely irrelevant macroscopically. A more careful numerical analysis allows one to estimate both X_N and X_S.
description: 13 pages plus 17 figures
Aktywizacja zawodowa młodych osób bezrobotnych w wybranych powiatach ziemskich podregionu siedleckiego
Vocational Activation of Young Unemployed in Selected Rural Counties of Siedlce Subregion
Creators: name: Rak, Anna Maria
name: Rak, Anna Maria
Publisher: name: Unknown
Year: 2018
Subjects: subject: Community/Rural/Urban Development
subject: Labor and Human Capital
subject: youth unemployment
subject: active labour market programmes
subject: methods of seeking employment
subject: bezrobocie osób młodych
subject: aktywne programy rynku pracy
subject: metody poszukiwania zatrudnienia

description: Youth unemployment is currently among the most serious problems on the Polish and EU labour markets. The young account for nearly half of the unemployed on the two markets. The purpose of the paper is to determine the interest of young unemployed residents of rural areas in labour market programmes and to diagnose the methods of seeking employment used by those people. The information presented mainly comes from the results of questionnaire surveys carried out in three rural counties of the Siedlce subregion. / Synopsis. Bezrobocie osób młodych należy aktualnie do najpoważniejszych problemów polskiego i unijnego rynku pracy. Na obydwu tych rynkach osoby młode stanowią blisko połowę ogółu bezrobotnych. Celem niniejszego opracowania jest określenie stopnia zainteresowania bezrobotnych młodych mieszkańców wsi aktywnymi programami rynku pracy oraz diagnoza najczęściej stosowanych przez te osoby metod poszukiwania zatrudnienia. Podstawowym źródłem informacji są wyniki badań ankietowych przeprowadzonych w trzech powiatach ziemskich podregionu siedleckiego.
description: eISSN 2544-0659
Real-World Textured Things: a Repository of Textured Models Generated with Modern Photo-Reconstruction Tools
Creators: name: Maggiordomo, Andrea
name: Ponchio, Federico
name: Cignoni, Paolo
name: Tarini, Marco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: We are witnessing a proliferation of textured 3D models captured from the real world with automatic photo-reconstruction tools. Digital 3D models of this class come with a unique set of characteristics and defects -- especially concerning their parametrization -- setting them starkly apart from 3D models originating from other, more traditional, sources. We study this class of 3D models by collecting a significant number of representatives and quantitatively evaluating their quality according to several metrics. These include a new invariant metric we design to assess the fragmentation of the UV map, one of the main weaknesses hindering the usability of these models. Our results back the widely shared notion that such models are not fit for direct use in downstream applications (such as videogames), and require challenging processing steps. Regrettably, existing automatic geometry processing tools are not always up to the task: for example, we verify that available tools for UV optimization often fail due mesh inconsistencies, geometric and topological noise, excessive resolution, or other factors; moreover, even when an output is produced, it is rarely a significant improvement over the input (according to the aforementioned measures). Therefore, we argue that further advancements are required specifically targeted at this class of models. Towards this goal, we share the models we collected in the form of a new public repository, Real-World Textured Things (RWTT), a benchmark to systematic field-test and compare algorithms. RWTT consists of 568 carefully selected textured 3D models representative of all the main modern off-the-shelf photo-reconstruction tools. The repository is available at http://texturedmesh.isti.cnr.it/ and is browsable by metadata collected during experiments, and comes with a tool, TexMetro, providing the same set of measures for generic UV mapped datasets.
Bioecology of Imbrasia epimethea (Drury, 1773) caterpillars consumed in Kwilu province, Democratic Republic of the Congo
Creators: name: Madamo Malasi, F.
name: Francis, F.
name: Caparros Megido, R.
Publisher: name: Brill Online
Year: 2024
Subjects: classificationCode: 309999
subject: Other agricultural, veterinary and food sciences not elsewhere classified

description: Imbrasia epimethea is one of the most esteemed and popular caterpillar species for its remarkable organoleptic and nutritional values. Its consumption extends throughout the Kwilu province and nearly the entire Democratic Republic of the Congo, but its supply is very limited. The high anthropogenic pressure and the poor harvesting techniques employed by the population of Kwilu pose a major threat to the conservation of the species. This study aims to investigate the bioecology of I. epimethea in order to develop semi-captive breeding techniques for these caterpillars, making them accessible to the population. In order to determine the host plants of I. epimethea, a survey was conducted among 424 caterpillar collectors from two populated and forested territories in the Kwilu province. To study the influence of changes in the caterpillars' diet on their growth and determine their developmental cycle, a breeding experiment was conducted. This study revealed that the caterpillars of I. epimethea do not accept transfers from Petersianthus macrocarpus to Funtumia africana. It also confirms the polyphagy of these caterpillars while indicating that, overall, P. macrocarpus proved to be the most suitable host in the Kwilu province. I. epimethea is a social species with a development cycle, from hatching to emergence, lasting approximately 115.33 ± 3.06 days. The larval stage lasts about a month but with a prolonged period of nymphal diapause. Further analysis of the leaves of P. macrocarpus and F. africana, as well as the analysis of the caterpillars themselves, along with several breeding trials, will provide further clarification on this matter.
Regionalizacja produkcji zwierzęcej na świecie
Regionalization of Animal Production in the World
Creators: name: Rokicki, Tomasz
name: Golonko, Magdalena
name: Perkowska, Aleksandra
name: Rokicki, Tomasz
name: Golonko, Magdalena
name: Perkowska, Aleksandra
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: International Relations/Trade
subject: Livestock Production/Industries
subject: globalization
subject: regionalization of agriculture
subject: animal production in the world
subject: globalizacja
subject: regionalizacja rolnictwa
subject: produkcja zwierzęca na świecie

description: The aim of the study was to assess the regionalization of animal production in the world and the changes that have occurred in this respect. The article presents the value of animal production in regions of the world defined by the continents. The source of the material was data from FAOSTAT. The period of research covered the years 2007-2016. The value of world animal production has steadily increased. Only at the time of the economic crisis in 2009 and in 2014-2015 were declines seen in all areas. There was a high concentration of animal production that was concentrated in Asia and Europe. There was a gradual relocation of production from Europe and North America to Asia and South America. These regularities have been confirmed also in the analysis of individual groups of animal products like meat, milk and eggs. At the same time, there was a very high concentration and a high degree of variation in animal production in the regions. Disproportions increased faster in meat and egg production than in milk production. / Synopsis. Celem głównym badań była ocena regionalizacji produkcji zwierzęcej na świecie oraz występującym w tym aspekcie zmian. W artykule przedstawiono wartość produkcji zwierzęcej w regionach świata określanych przez kontynenty. Źródłem materiałów były dane z FAOSTAT. Okres badań dotyczył lat 2007-2016. Wartość światowej produkcji zwierzęcej stale wzrastała. Jedynie w momencie kryzysu gospodarczego w 2009 roku oraz w latach 2014-2015 zaobserwowano spadki we wszystkich obszarach. Stwierdzono dużą koncentrację produkcji zwierzęcej, która była skupiona w Azji i Europie. Następowało stopniowe przenoszenie produkcji z Europy i Ameryki Północnej do Azji i Ameryki Południowej. Prawidłowości te zostały potwierdzone również przy analizie poszczególnych grup produktów zwierzęcych, jak mięso, mleko i jaja. Jednocześnie stwierdzono bardzo dużą koncentrację i występowanie dużego zróżnicowania produkcji zwierzęcej w regionach. Dysproporcje wzrastały szybciej w przypadku produkcji jaj i mięsa niż mleka.
description: eISSN 2544-0659
Magnetic billiards: Non-integrability for strong magnetic field; Gutkin type examples
Creators: name: Bialy, Misha
name: Mironov, Andrey E.
name: Shalom, Lior
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We consider magnetic billiards under a strong constant magnetic field. The purpose of this paper is two-folded. We examine the question of existence of polynomial integral of billiard magnetic flow. We succeed to reduce this question to algebraic geometry test on existence of polynomial integral, which shows polynomial non-integrability for all but finitely many values of the magnitude. In the second part of the paper we construct examples of magnetic billiards which have the so called $δ$-Gutkin property, meaning that any Larmor circle entering the domain with angle $δ$ exits the domain with the same angle $δ$. For ordinary Birkhoff billiard in the plane such examples were introduced by E. Gutkin and are very explicit. Our construction of Gutkin magnetic billiards relies on beautiful examples by F.Wegner of the so called Zindler curves, which are related to the problem of floating bodies in equilibrium, which goes back to S.Ulam. We prove that Gutkin magnetic billiard can be obtained as a parallel curve to a Wegner curve. Wegner curves can be written by elliptic functions in polar coordinates so the construction of magnetic Gutkin billiard is rather explicit but much more complicated.
description: arXiv admin note: text overlap with arXiv:1605.03372
Is there a common origin for the WMAP low multipole and for the ellipticity in BOOMERanG CMB maps?
Creators: name: Gurzadyan, V. G.
name: Ade, P. A. R.
name: de Bernardis, P.
name: Bianco, C. L.
name: Bock, J. J.
name: Boscaleri, A.
name: Crill, B. P.
name: De Troia, G.
name: Hivon, E.
name: Hristov, V. V.
name: Kashin, A. L.
name: Lange, A. E.
name: Masi, S.
name: Mauskopf, P. D.
name: Montroy, T.
name: Natoli, P.
name: Netterfield, C. B.
name: Pascale, E.
name: Piacentini, F.
name: Polenta, G.
name: Ruhl, J.
name: Yegorian, G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have measured the ellipticity of several degree scale anisotropies in the BOOMERanG maps of the Cosmic Microwave Background (CMB) at 150 GHz. The average ellipticity is around 2.6-2.7. The biases of the estimator of the ellipticity and for the noise are small in this case. Large spot elongation had been detected also for COBE-DMR maps. If this effect is due to geodesic mixing, it would indicate a non precisely zero curvature of the Universe which is among the discussed reasons of the WMAP low multipole anomaly. Both effects are related to the diameter of the Universe: the geodesics mixing through hyperbolic geometry, low multipoles through boundary conditions.This common reason can also be related with the origin of the the cosmological constant: the modes of vacuum fluctuations conditioned by the boundary conditions lead to a value of the cosmological constant being in remarkable agreement with the supernovae observations.
description: Added: two co-authors and a comment on the possible relation of the discussed CMB properties with the origin of the observed value of the cosmological constant
The Problem of Food Waste in Different Types of Households on the Example of the Residents of Poland and Polish People Residing in the United Kingdom – Pilot Study
Creators: name: Skotnicka, Magdalena
name: Karwowska, Kaja
name: Śmiechowska, Maria
name: Skotnicka, Magdalena
name: Karwowska, Kaja
name: Śmiechowska, Maria
Publisher: name: Unknown
Year: 2018
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: International Relations/Trade
subject: waste food
subject: household

description: The objective of this study was comparing the scale of food waste depending on different types of households among Poles living in Poland and in the UK. The research was conducted in the group of 622 persons, whereas 345 persons lived in Poland and 277 were residing in the UK for minimum 2 years, however not longer than 10 years. The respondents were differentiated depending on the type of the household in which they lived: 1-person, 2-person, 3-person, 4-person and more. More than the half of the respondents declared that they had happened to throw away food, whereas these are the “British” Poles who waste food most and who are comprised in 1- and 2-person households. A significant dependence was observed in both studied groups, the more numerous the household was the lesser amount of food was wasted. The mostly wasted food included bread, yoghurts, sausage, fruit and vegetables, regardless of the number of persons in the given household or of the place of residence. Due to the fact that the rate of food waste is so high, it is necessary to find a way to implement new ideas and interventions which would limit the food waste in the households.
description: eISSN 2544-0659
Axial form factor of the nucleon in the perturbative chiral quark model
Creators: name: Khosonthongkee, K.
name: Lyubovitskij, V. E.
name: Gutsche, Th.
name: Faessler, Amand
name: Pumsa-ard, K.
name: Cheedket, S.
name: Yan, Y.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We apply the perturbative chiral quark model (PCQM) at one loop to analyze the axial form factor of the nucleon. This chiral quark model is based on an effective Lagrangian, where baryons are described by relativistic valence quarks and a perturbative cloud of Goldstone bosons as dictated by chiral symmetry. We apply the formalism to obtain analytical expressions for the axial form factor of the nucleon, which is given in terms of fundamental parameters of low-energy pion-nucleon physics (weak pion decay constant, strong pion-nucleon form factor) and of only one model parameter (radius of the nucleonic three-quark core).
description: 23 pages, 5 figures, accepted for publication in J. Phys. G
Rynek mięsa wieprzowego w Polsce w obliczu afrykańskiego pomoru świń (ASF)
The Pork Market in Poland in the Face of African Swine Fever (ASF)
Creators: name: Tereszczuk, Mirosława
name: Tereszczuk, Mirosława
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: International Relations/Trade
subject: Livestock Production/Industries
subject: ASF,
subject: African swine fever
subject: pork market
subject: export
subject: Poland
subject: afrykański pomór świń,
subject: rynek mięsa wieprzowego
subject: Polska

description: The aim of the study is to assess the impact of African swine fever virus (ASF) on the development and functioning of the pork market in Poland. This virus appeared in Poland in February 2014 in wild boars, and then in July 2014 in pigs. The study covers the years 2014-2018, the period of ASF virus in Poland. By the end of July 2018, there were 182 cases of ASF in pigs and over 2.6 thousand in wild boars in four provinces of eastern and central Poland, and the largest cluster of this disease is located in the Lublin province. The appearance of ASF virus has had a negative impact on the pork market in Poland, resulting in restrictions on the export of this meat, costs of eradication of outbreaks and biosecurity. Despite these difficulties, the production of pork at this time was characterized by an upward trend, while exports only in the first year of the ASF decreased, but in subsequent years, due to the diversification of markets, there was an increase in exports. The descriptive method and simple statistical analyzes were used for the study. / Synopsis. Celem badania jest ocena oddziaływania wirusa afrykańskiego pomoru świń ASF (African Swine Fever) na rozwój i funkcjonowanie rynku mięsa wieprzowego w Polsce. Wirus ten pojawił się w Polsce w lutym 2014 roku u dzików, a następnie w lipcu 2014 roku u świń. Badanie obejmuje lata 2014-2018, czyli okres występowania wirusa ASF w Polsce. Do końca lipca 2018 roku odnotowano 182 przypadki ASF u świń i ponad 2,6 tysiąca u dzików w czterech województwach wschodniej i centralnej Polski, a największe skupisko tej choroby zlokalizowane jest w województwie lubelskim. Pojawienie się wirusa ASF negatywnie wpłynęło na rynek mięsa wieprzowego w Polsce, skutkując ograniczeniami w eksporcie tego mięsa, kosztami likwidacji ognisk choroby i bioasekuracji. Mimo tych trudności produkcja mięsa wieprzowego w Polsce w latach 2014-2018 odznaczała się tendencją wzrostową, a eksport jedynie w pierwszym roku występowania ASF obniżył się, w kolejnych latach, w związku z dywersyfikacją rynków zbytu, odnotowano jego wzrost. Do badania zastosowano metodę opisową i proste analizy statystyczne.
description: eISSN 2544-0659
Two spectral QSPR models of porphyrin macromolecules for chelating heavy metals and different ligands released from industrial solvents: CH2Cl2, CHCl3 and toluene
Creators: name: A.R. Akbarzadeh
name: M. Nekoeifard
name: R. Rahmatollah
name: M.H. Keshavarz
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer

description: Two simple and reliable correlations are introduced for the prediction of emission and absorption of porphyrins and their derivatives, i.e. metalloporphyrins and ligand coordinated metalloporphyrins. They can be used to sense the extracted precious metals. The proposed models require only simple structural parameters such as the number of carbon, metal and metal-free molecular fragments of desirable porphyrins or their derivatives. Since the proposed models depend on molecular structures of the desired compounds, they can be easily applied for complex molecular structures. Experimental data of 272 porphyrin derivatives were used to derive and test the novel models for the assessment of their emission (Em.) and absorption (Abs.) values in three solvents namely dichloromethane, toluene and chloroform. The values of the coefficients of determination (r2) for the training set (183 compounds) in dichloromethane and three different test sets, corresponding to the three mentioned solvents, for the emission and absorption correlations were greater than 0.70. The calculated values of the root-mean-square error (RMSE) for the training sets of Em. and Abs. correlations were equal to 7.56 and 4.86 nm, respectively. Further statistical parameters also confirm the high reliability of the new models.
Ullemar's formula for the Jacobian of the complex moment mapping
Creators: name: Kuznetsova, Olga S.
name: Tkachev, Vladimir G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Complex Variables (math.CV)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 30E20; 30C20; 11C20; 46G25

description: The complex moment sequence m(P) is assigned to a univalent polynomial P by the Cauchy transform of the P(D), where D is the unit disk. We establish the representation of the Jacobian det dm(P) in terms of roots of the derivative P'. Combining this result with the special decomposition for the Hurwitz determinants, we prove a formula for the Jacobian which was previously conjectured by C. Ullemar. As a consequence, we show that the boundary of the class of all locally univalent polynomials in $U$ is contained in the union of three irreducible algebraic surfaces.
description: 14 pages, submitted for "Complex Variables. Theory and Application"
Additional file 1 of Whole genome resequencing of the Iranian native dogs and wolves to unravel variome during dog domestication
Creators: name: Ghanatsaman, Zeinab Amiri
name: Wang, Guo-Dong
name: Hojjat Asadollahpour Nanaei
name: Fozi, Masood Asadi
name: Peng, Min-Sheng
name: Esmailizadeh, Ali
name: Zhang, Ya-Ping
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Computational Biology

description: Additional file 1: Tables S1-S15 and Figs. S1-S19.
The Investment Attractiveness of the Agricultural Sector in Republic of Moldova in Terms of European Integration
Creators: name: Timofti, Elena
name: Popa, Daniela
name: Petrascu, Svetlana
name: Osborne, Paul
name: Timofti, Elena
name: Popa, Daniela
name: Petrascu, Svetlana
name: Osborne, Paul
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: International Development
subject: International Relations/Trade
subject: economic growth
subject: investment attractiveness
subject: investment environment
subject: project financing
subject: bank loans

description: The modernization of the Agro-food sector, and revitalization of its conditions and standards, needs to attract funding sources from international donors, which helps stimulate the development of high value agriculture. Consequently, attracting agricultural investment is a strategic priority for Moldovan farmers, as this represents tangible economic growth based on retooling and modernization of agriculture. The National Bureau of Statistics ranks Moldova second in relation to the interest rates charged for loans. The average annual interest rate for lending to agriculture is 14.13%. Georgia in first place with 29%. Despite all the successes of banking, agriculture (as a sector) still remains an unattractive investment for banks in Moldova. The banking sector has also expressed reluctance in supporting small-scale agribusiness.
description: eISSN 2544-0659
Exploring the structural aspects of ureido-amino acid-based APN inhibitors: a validated comparative multi-QSAR modelling study
Creators: name: S. Banerjee
name: S.A. Amin
name: S.K. Baidya
name: N. Adhikari
name: T. Jha
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: The zinc-dependent enzyme aminopeptidase N (APN) is a member of the M1 metalloenzyme family. The multi-functionality of APN as a peptidase, a receptor and a signalling molecule has provided it the access to influence a number of disease conditions namely viral diseases, angiogenesis, cellular metastasis and invasion including different cancer conditions. Hence, the development of potent APN inhibitors is a possible route for the treatment of diseases related to the activity of APN. In this study, different QSAR approaches have been adopted to identify the structural features of a group of hydroxamate-based ureido-amino acid derivative APN inhibitors. This study was able to identify different constitutional aspects of these APN inhibitors which are important for their inhibitory potency. Additionally, some of these observations were also aligned with the observations of previously performed QSAR studies conducted on different APN inhibitors. Therefore, the results of this study may help to design potent and effective APN inhibitors in the future.
Revealing binding selectivity of inhibitors toward bromodomain-containing proteins 2 and 4 using multiple short molecular dynamics simulations and free energy analyses
Creators: name: L.F. Wang
name: Y. Wang
name: Z.Y. Yang
name: J. Zhao
name: H.B. Sun
name: S.L. Wu
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Emerging evidences indicate bromodomain-containing proteins 2 and 4 (BRD2 and BRD4) play critical roles in cancers, inflammations, cardiovascular diseases and other pathologies. Multiple short molecular dynamics (MSMD) simulations combined with molecular mechanics generalized Born surface area (MM-GBSA) method were applied to investigate the binding selectivity of three inhibitors 87D, 88M and 89G towards BRD2 over BRD4. The root-mean-square fluctuation (RMSF) analysis indicates that the structural flexibility of BRD4 is stronger than that of BRD2. Moreover the calculated distances between the Cα atoms in the centres of the ZA_loop and BC_loop of BRD4 are also bigger than that of BRD2. The rank of binding free energies calculated using MM-GBSA method agrees well with that determined by experimental data. The results show that 87D can bind more favourably to BRD2 than BRD4, while 88M has better selectivity on BRD4 over BRD2. Residue-based free-energy decomposition method was utilized to estimate the inhibitor-residue interaction spectrum and the results not only identify the hot interaction spots of inhibitors with BRD2 and BRD4, but also demonstrate that several common residues, including (W370, W374), (P371, P375), (V376, V380) and (L381, L385) belonging to (BRD2, BRD4), generate significant binding difference of inhibitors to BRD2 and BRD4.
Domestic Food Programs
Creators: name: Allen, Joyce
name: Allen, Joyce
Publisher: name: Unknown
Year: 1982
Subjects: Food Security and Poverty

description: Recently enacted legislation has significantly reduced the scope of the Food Stamp Program and the child nutrition programs. The Omnibus Reconciliation Act of 1981 (Public Law 97-35) and title XIII of the Agriculture and Food Act of 1981 (Public Law 97-98, also known as the Food Stamp and Commodity Distribution Amendments of 1981) mandate tighter eligibility criteria, lower reimbursement rates, and increased efforts to reduce fraud and abuse. These reductions will probably help slow future growth rates in the food assistance programs.
Self-similar structure of resistive ADAFs with outflow and large-scale magnetic field
Creators: name: Ghoreyshi, S. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The observations and simulations have revealed that large-scale magnetic field and outflows can exist in the inner regions of an advection-dominated accretion disc where the resistive diffusion may also be important. In the present paper, the roles of large-scale magnetic field and outflows in the structure of resistive advection-dominated accretion discs are explored by assuming that the accretion flow is radially self-similar. In the non-ideal magnetohydrodynamic (MHD) approximation, the results show that the angular velocity is always sub-Keplerian when both the outflow and the large-scale magnetic field are taken into account. A stronger toroidal field component leads to faster rotation, while the disc rotates with faster rate if the vertical field component is weaker. The increase of magnetic diffusivity causes the infall velocity to be close to Keplerian velocity. Although the previous studies in the ideal MHD approximation have shown that the disc temperature decreases due to the vertical field component, we find that the effect of vertical field component on the temperature of a resistive disc depends on the magnetic diffusivity. When the magnetic diffusivity is high, the more efficient mechanism for decreasing the disc temperature can be the outflows, and not the large-scale magnetic field. In such a limit of the magnetic diffusivity, the components of the large-scale magnetic field enhance the gas temperature. The increase of temperature can lead to heating and acceleration of the electrons and help us to explain the origin of phenomena such as the flares in Sgr A*. On the other hand, the infall velocity in such a limit rises as the temperature increases, and therefore the surface density falls to too low values. Any change in the density profile can alter the structure and the emitted spectrum of disc.
description: 13 pages, 4 figures
Cosmological mass limits on neutrinos, axions, and other light particles
Creators: name: Hannestad, Steen
name: Raffelt, Georg
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The small-scale power spectrum of the cosmological matter distribution together with other cosmological data provides a sensitive measure of the hot dark matter fraction, leading to restrictive neutrino mass limits. We extend this argument to generic cases of low-mass thermal relics. We vary the cosmic epoch of thermal decoupling, the radiation content of the universe, and the new particle's spin degrees of freedom. Our treatment covers various scenarios of active plus sterile neutrinos or axion-like particles. For three degenerate massive neutrinos, we reproduce the well-known limit of m_nu < 0.34 eV. In a 3+1 scenario of 3 massless and 1 fully thermalized sterile neutrino we find m_nu < 1.0 eV. Thermally produced QCD axions must obey m_a < 3.0 eV, superseding limits from a direct telescope search, but leaving room for solar eV-mass axions to be discovered by the CAST experiment.
description: 15 pages, 6 figures, matches version in JCAP
Magnetic field effects in the near-field radiative heat transfer between planar structures
Creators: name: Moncada-Villa, Edwin
name: Cuevas, Juan Carlos
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: One of the main challenges in the field of thermal radiation is to actively control the near-field radiative heat transfer (NFRHT) between closely spaced bodies. In this context, the use of an external magnetic field has emerged as a very attractive possibility and a plethora of physical phenomena have been put forward in the last few years. Here, we predict some additional magnetic-field-induced phenomena that can take place in the context of NFRHT between planar layered structures containing magneto-optical (MO) materials (mainly doped semiconductors like InSb). In particular, we predict the possibility of increasing the NFRHT upon applying an external magnetic field in an asymmetric structure consisting of two infinite plates made of InSb and Au. We also study the impact of a magnetic field in the NFRHT between structures containing MO thin films and show that the effect is more drastic than in their bulk counterparts. Finally, we systematically investigate the anisotropic thermal magnetoresistance, i.e., the dependence of the radiative heat conductance on the orientation of an external magnetic field, in the case of two infinite plates made of InSb and show that one can strongly modulate the NFRHT by simply changing the orientation of the magnetic field. All the phenomena predicted in this work can be experimentally tested with existent technology and provide a new insight into the topic of active control of NFRHT.
description: 11 pages, 9 figures
Agrarian and Land Reforms in Rwanda: Situation and Perspectives
Creators: name: Mizero, M.
name: Karangwa, A.
name: Burny, P.
name: Michel, B.
name: Lebailly, P.
name: Mizero, M.
name: Karangwa, A.
name: Burny, P.
name: Michel, B.
name: Lebailly, P.
Publisher: name: Unknown
Year: 2018
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Environmental Economics and Policy
subject: land access
subject: agrarian perspectives
subject: land reforms
subject: foreignization
subject: Rwanda

description: Rwanda is a landlocked country of Eastern Africa with 26,338 km2. The total arable land in Rwanda is more or less than 1.8 million ha and Rwanda has the highest population density in Africa. A series of policy reforms and agrarian strategic plan have been elaborated to transform the economy now oriented towards subsistence agriculture into a knowledge-based service and market-oriented economy. The research question is who has the right to land ownership for its rational use? The purpose of this article is to contribute to land sharing prospects between agricultural operators and investors in Rwanda for the optimisation of land access in the rural areas. This work is the result of deep literature review related to the situation of land issue prevailing from pre-colonial period to the recent 2004 land policy reforms in Rwanda. Crucial challenges before the beginning of the effective agrarian evolution are widely discussed. Agrarian perspectives show that the foreignization of agrarian reforms put Rwandan peasants in uncomfortable position. The changes in land use and tenure in Rwanda have been stimulated by both outside influence and inside adversary forces. The real land reform policy consists in specialization and exploitation of large-scale farms subsequent to land consolidation of small plots registered by individuals whose property certificates are preserved. Meanwhile, the required registration of land holdings does not entitle the land to definitive appropriation but it only provides the rights of use if rational exploitation is guaranteed. Such a rational system may result in expropriation for the inefficient producers.This article emphasize that in the case of Rwanda were population growth rate is high, the redistribution of land has its limits. The land consolidation should not be a rule either. Any agrarian reform must find a point of balance. This equilibrium consists in reducing the pressure on the property assets and promoting rural entrepreneurship. Agriculture program may improve and diversify the mode of land access and improved input acquisition to feed a growing population whereas non-agriculture population is gradually increasing. It has been found that farmers operating in co-operatives are more secure and have advantage for land access than individual farmers.
Wideband Millimeter-Wave Beam Training with True-Time-Delay Array Architecture
Creators: name: Yan, Han
name: Boljanovic, Veljko
name: Cabric, Danijela
Publisher: name: arXiv
Year: 2019
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Millimeter-wave communications rely on beamforming gain from both transmitters and receivers to compensate for severe propagation loss. To achieve adequate gain, beam training is required to identify propagation directions. The main challenge in beam training arises from maintaining low overhead with increased array size. This paper presents a novel one-shot beam training technique that utilizes the emerging architecture of true-time-delay (TTD) arrays. We first show that TTD arrays facilitate frequency dependent beam steering. The proposed training procedure with TTD arrays then exploits this fact by using a single radio-frequency-chain to multiplex different subcarriers into different sounding directions. We derive conditions on the parameters of TTD array configuration and physical layer to achieve scanning of the entire angular domain with a single orthogonal frequency-division multiplexing (OFDM) training symbol. The estimation of propagation directions with high resolution is achieved via low-complexity digital signal processing of spatially coded subcarriers. Simulation results show that this TTD array based approach requires an order-of-magnitude fewer training symbols than those of phased arrays.
description: 6 pages, 4 figures, paper presented in 2019 IEEE Asilomar Conference on Signals, Systems, and Computers