cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Infiltration effects on cross-shore sedimnet transport
Creators: name: Elliott, Trevor Ross
Publisher: name: University of British Columbia
Year: 2009

description: Theory is reviewed which relates infiltration into a permeable beach with the net onshore or offshore transport of sediment by wave action. This theory is tested experimentally by using sands of different permeability and by using underdrains in the beach and a pump to increase the infiltration capacity. Previous studies are reviewed, although these earlier studies have had different purposes. Some prior investigations have studied wave propagation over a permeable slope or have determined wave damping and energy dissipation due to percolation into a porous bed. Other studies have investigated wave interactions with permeable structures such as rubblemound breakwaters and have shown that the exchange of fluid between the external and internal flow regions markedly affects wave uprush, backrush and set-up in the surf zone. A limited number of previous studies have considered the flow of fluid into a permeable beach and its role in beach stabilization and erosion control. The present tests were performed in the wave flume of the Hydraulics Laboratory of the Department of Civil Engineering at the University of British Columbia. Intermediate and equilibrium beach profiles are presented and compared. The findings of this study indicate substantial differences between impermeable and porous material. Experimental results show more permeable beaches form steeper profiles, while less permeable beaches form shallower profiles. Moreover, increasing infiltration by pumping initiates immediate onshore sediment motion and considerable steepening of the cross-sectional profile. To a large extent this steepening process was reversible when pumping was stopped. The results of this study confirm the predictions of the theory that infiltration contributes directly to a net onshore stress and onshore sediment transport.
SOIL COMPACTION IMPACT ON SOIL FUNCTIONS IN DRYLAND PRODUCTION SYSTEMS OF THE PACIFIC NORTHWEST
Creators: name: Salguero Gaibor, Diana L.
Publisher: name: Washington State University
Year: 2026
Subjects: bulk density
covariates
root length
Soil compaction
soil moisture
yield

description: Soil compaction in agriculture is often overlooked and rarely measured. Once compaction occurs, restoring soil functionality is challenging and costly, and it varies in effectiveness based on soil texture and cropping system. Remediation techniques, including mechanical loosening and crop rotations aimed at breaking compacted layers, lack consistent validation due to limited reliable measurement tools. Compaction has been shown to reduce yield, primarily by limiting water availability; however, these effects fluctuate with weather conditions. The below-ground impact of compaction on roots and soil properties remains poorly understood, especially in rain-fed systems. This study addresses these gaps by linking compaction to critical agricultural functions, including yield, root growth, and soil water storage. Additionally, we introduced a field-scale protocol (10-500 ha) for measuring and mapping compaction. Compacted soils generally had higher water content but showed a decline of up to 20 mm in water depletion at 0-
description: 1.05 m depths. Increased compaction correlated with reduced root length density in wheat roots across all diameters (0.30-1.05 m), whereas in canola, responses were less consistent. Root length density, which was explained 9-42% by volumetric water content, showed stronger correlations at shallower depths, and reductions in root density were associated with a 0.14 Mg ha-1 yield decrease. High-traffic areas showed quality losses, with canola yield decreasing by 0.5 Mg ha-1 and wheat by 1.2 Mg ha-1, along with reduced canola oil content (-1.9%) and lower test weights in wheat (-0.78 lb bu-1). Compaction also raised grain protein content by 3.3% in canola and 1.1% in wheat. We implemented pedotransfer functions using penetrometer force, depth of insertion, and soil water content for bulk density predictions, alongside environmental and terrain
description: variables from proximal and remote sensing. Models achieved RMSEs of 0.09-0.81 Mg m-3 for profile and spatial bulk density predictions, though driest site predictions were less accurate. Our mapping protocol offered insights but also revealed challenges in accounting for spatial variability, suggesting the need for enhanced sampling. As the first study to link compaction with yield quality reductions, we propose that future research include quality traits as additional indicators of compaction. Furthermore, the potential impact of reduced root growth and biomass on carbon sequestration requires exploration.
Nutritional Importance of Dietary Vitamin E on Fertility Functions in Poultry
Creators: name: Manju Lata, Assistant Professor
Publisher: name: veterinary today
Year: 2024
Subjects: Nutritional Importance of Dietary Vitamin E on Fertility Functions in Poultry

description: Department of Animal Nutrition, College of Veterinary and Animal Sciences, GBPUAT, Pantnagar, 263145, U.S. Nagar, Uttrakhand, India
The magnetic obliquities of accreting T Tauri stars
Creators: name: McGinnis, Pauline
Publisher: name: Zenodo
Year: 2021
Subjects: accretion
techniques: spectroscopic
stars: magnetic field
stars: variables: T Tauri
young stars

description: Classical T Tauri stars (CTTS) accrete material from their disk through their magnetosphere. The geometry of the accretion flow strongly depends on the magnetic obliquity, i.e., the angle between the rotational and magnetic axes. In this work, we derive the distribution of magnetic obliquities in a sample of 11 accreting T Tauri stars, by monitoring the radial velocity variations of the HeI\(\lambda 5876\)Å line in their spectra along their rotational cycle. HeI is produced in the accretion shock, close to the magnetic pole. When the magnetic and rotational axes are not aligned, the radial velocity of this line is modulated by stellar rotation, with an amplitude that is related to the star's projected rotational velocity (vsini) and the latitude of the hotspot. By deriving vsini and HeI radial velocity curves from our spectra we thus obtain an estimate of the magnetic obliquities.
 In our sample, we find an average obliquity of 11.4(\(\pm\)5.4)\(^{\circ}\). The magnetic axis thus seems nearly but not exactly aligned with the rotational axis in these stars, somewhat in disagreement with studies of spectropolarimetry, which have found a significant misalignment (\(\gtrsim 20^{\circ}\)) for several CTTS. This difference compared to previous studies could simply be an effect of low number statistics, or it may be due to a selection bias of our sample. From their positions on the HR diagram, we note that most of the stars in our sample should still be fully convective. We find tentative evidence that the magnetic obliquity may vary according to the stellar interior and that there may be a significant difference between fully convective and partly radiative stars.
description: {"references": ["Bouvier J. et al., 2007, A&A, 463, 1017", "Donati, J.-F. et al. 2010, MNRAS, 409, 1347", "Donati, J.-F. et al. 2011, MNRAS, 412, 2454", "Beristain G., Edwards S., Kwan J., 2001, ApJ, 551, 1037", "Johnstone, C. et al. 2014, MNRAS, 437, 3202", "Tognelli E., Prada Moroni P. G., Degl'Innocenti S., 2011, A&A, 533, A109"]}
Modular Deep Reinforcement Learning for Continuous Motion Planning with Temporal Logic
Creators: name: Cai, Mingyu
name: Hasanbeig, Mohammadhosein
name: Xiao, Shaoping
name: Abate, Alessandro
name: Kan, Zhen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Formal Languages and Automata Theory (cs.FL)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: This paper investigates the motion planning of autonomous dynamical systems modeled by Markov decision processes (MDP) with unknown transition probabilities over continuous state and action spaces. Linear temporal logic (LTL) is used to specify high-level tasks over infinite horizon, which can be converted into a limit deterministic generalized Büchi automaton (LDGBA) with several accepting sets. The novelty is to design an embedded product MDP (EP-MDP) between the LDGBA and the MDP by incorporating a synchronous tracking-frontier function to record unvisited accepting sets of the automaton, and to facilitate the satisfaction of the accepting conditions. The proposed LDGBA-based reward shaping and discounting schemes for the model-free reinforcement learning (RL) only depend on the EP-MDP states and can overcome the issues of sparse rewards. Rigorous analysis shows that any RL method that optimizes the expected discounted return is guaranteed to find an optimal policy whose traces maximize the satisfaction probability. A modular deep deterministic policy gradient (DDPG) is then developed to generate such policies over continuous state and action spaces. The performance of our framework is evaluated via an array of OpenAI gym environments.
description: arXiv admin note: text overlap with arXiv:2010.06797
Completing the census of low-mass stars and brown dwarfs towards the Chamaeleon clouds.pdf
Creators: name: Kubiak, K.
name: Muzic, K.
name: Sousa, I.
name: Almendros Abad, V.
name: Köhler, R.
name: Scholz, A.
Publisher: name: Zenodo
Year: 2021
Subjects: Young stars

description: The molecular cloud complex of Chamaeleon hosts one of the richest populations of young low-mass stars in the Solar vicinity. However, the stellar and substellar census of several of young clusters and groups towards this region is still incomplete. This is starting to change thanks to the availability of wide-field missions such as Gaia, allowing for robust candidate selection using photometry, proper motions and parallaxes. In this contribution I will present the optical spectroscopic follow-up of low-mass stars in Cha I and epsilon Cha selected from Gaia DR2 and 2MASS. Our work identifies several new members of Cha-I, and increases the census of spectroscopically confirmed epsilon Cha members by more than 40%. We derive the first IMF in epsilon Cha that extends into the substellar regime (down to ~0.03 MSun), and we find it to be consistent with that of other young clusters. I will point out similarities between epsilon Cha and the southernmost part of Lower Centaurus Crux, both lying at similar distances and sharing the same proper motions. This suggest that the two groups may have been born during the same star formation event.
A Critical Look at the Consistency of Causal Estimation With Deep Latent Variable Models
Creators: name: Rissanen, Severi
name: Marttinen, Pekka
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Using deep latent variable models in causal inference has attracted considerable interest recently, but an essential open question is their ability to yield consistent causal estimates. While they have demonstrated promising results and theory exists on some simple model formulations, we also know that causal effects are not even identifiable in general with latent variables. We investigate this gap between theory and empirical results with analytical considerations and extensive experiments under multiple synthetic and real-world data sets, using the causal effect variational autoencoder (CEVAE) as a case study. While CEVAE seems to work reliably under some simple scenarios, it does not estimate the causal effect correctly with a misspecified latent variable or a complex data distribution, as opposed to its original motivation. Hence, our results show that more attention should be paid to ensuring the correctness of causal estimates with deep latent variable models.
description: 10 pages for main text + 19 pages for references and supplementary. 18 Figures
Blanco DECam Bulge Survey (BDBS) Early Science Results: Red Clump Metallicities
Creators: name: Johnson, Christian I.
name: Rich, R. Michael
name: BDBS
Publisher: name: Zenodo
Year: 2021

description: The Blanco DECam Bulge Survey (BDBS) used the 3 sq. degree Dark Energy Camera to image > 200 contiguous square degrees of the Southern Galactic bulge in order to better understand its structure, formation, and chemical enrichment history. The catalog contains PSF photometry and astrometry for ~250 million sources in all 6 bands. Early science results show that the u-i color index is a strong metallicity indicator for red clump stars, and that the red clump exhibits a complex photometric morphology. The resulting metallicity distribution functions show a dramatic change from a unimodal, but long-tailed, distribution close to the plane to a bimodal metal-poor distribution at higher latitudes.
On the origin of the neutral hydrogen supershells: the ionized progenitors and the limitations of the multiple supernovae hypothesis
Creators: name: Silich, Sergiy
name: Elias, Federico
name: Franco, José
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Here we address the question whether the ionized shells associated with giant HII regions can be progenitors of the larger HI shell-like objects found in the Milky Way and other spiral and dwarf irregular galaxies. We use for our analysis a sample of 12 HII shells presented recently by Relaño et al. (2005, 2007). We calculate the evolutionary tracks that these shells would have if their expansion is driven by multiple supernovae explosions from the parental stellar clusters. We find, contrary to Relaño et al. (2007), that the evolutionary tracks of their sample HII shells are inconsistent with the observed parameters of the largest and most massive neutral hydrogen supershells. We conclude that HII shells found inside giant HII regions may represent the progenitors of small or intermediate HI shells, however they cannot evolve into the largest HI objects unless, aside from the multiple supernovae explosions, an additional energy source contributes to their expansion.
description: Accepted for publication in ApJ, tentatively scheduled for the ApJ July 1, 2008, v681n1 issue. 19 pages, 4 figures
ContiBAIT: An R package for genome finishing using strand-seq
Creators: name: O'Neill, Kieran
name: Hills, Mark
name: Lansdorp, Peter
name: Brinkman, Ryan
Publisher: name: F1000Research
Year: 2015

description: Strand-seq is a method for directional, low-coverage sequencing of DNA template strands in single cells. Taken together, strand-seq data from cells from the same organism provide genomic distance information. This can be used to improve the quality of early-build reference genomes made up of many contigs with no bridging sequence, firstly by grouping contigs from the same chromosome together, and secondly by ordering contigs within chromosomes. We present ContiBAIT, an R package for performing these tasks.

For grouping contigs into chromosomes, contiBAIT uses a custom clustering method based on a Chinese restaurant process. Contigs are then reoriented using a greedy algorithm which optimises for global inter-contig distance. Contig groups showing close strand similarity following reorientation are merged.

For ordering contigs within a putative chromosome, ContiBAIT computes the strand distance between all pairs of contigs. The problem then becomes one of finding the lowest-weight Hamiltonian path over the contigs, which can be reformulated into a travelling salesman problem. ContiBAIT then finds the best ordering of contigs using the TSP package.

To validate contig clustering, we applied ContiBAIT to an early build of the mouse genome (mm2), with coordinates lifted over to mm10. ContiBAIT was able to assign most contigs with sufficient read depth for strand-seq analysis to the correct chromosome (median F-measure=0.91).

To validate contig ordering, we applied ContiBAIT to artificial contigs sampled from mm10, of sizes 1MB, 500kB and 250kB. Some chromosomes were well-ordered (Pearson's rho=0.99), while others had large sections locally well-ordered but incorrectly ordered relative to each other.
Clonal heterogeneity in neuroblastoma: reconstructing tumoral architecture from WGS data
Creators: name: Deveau, Paul
name: Boeva, Valentina
name: Schleiermacher, Gudrun
Publisher: name: F1000Research
Year: 2015

description: We hereby show that our method, QuantumClone, is able to reconstruct clonal population from cancer whole genome sequencing data, even for cancers with somatic copy number alterations and hyperploidy.

Its efficiency, evaluated by a simulation algorithm called QuantumCat, shows that QuantumClone performs better than previously published methods in difficult conditions, such as low sequencing depth and high contamination.
Advancements In Biometric Techniques For Moroccan Argan Grove Goats
Creators: name: Tami, Hamza
name: Amellal, Mohamed
name: Ezzaky, Youssef
name: Achemchem, Fouad
Publisher: name: Zenodo
Year: 2024
Subjects: Biometric identification; Goats; Animal welfare; Sustainable livestock management

description: Presented as Oral Presentation: EU PRIMA Online Seesion; and in Book of Abstracts of 16th AgroStat Conference (AgroStat 2024). Bragança, Portugal (3rd-6th September 2024).
Resource Management for 5G NR Integrated Access and Backhaul: a Semi-centralized Approach
Creators: name: Pagin, Matteo
name: Zugno, Tommaso
name: Polese, Michele
name: Zorzi, Michele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: The next generations of mobile networks will be deployed as ultra-dense networks, to match the demand for increased capacity and the challenges that communications in the higher portion of the spectrum (i.e., the mmWave band) introduce. Ultra-dense networks, however, require pervasive, high-capacity backhaul solutions, and deploying fiber optic to all base stations is generally considered to be too expensive for network operators. The 3rd Generation Partnership Project (3GPP) has thus introduced Integrated Access and Backhaul (IAB), a wireless backhaul solution in which the access and backhaul links share the same hardware, protocol stack, and also spectrum. The multiplexing of different links in the same frequency bands, however, introduces interference and capacity sharing issues, thus calling for the introduction of advanced scheduling and coordination schemes. This paper proposes a semi-centralized resource allocation scheme for IAB networks, designed to be flexible, with low complexity, and compliant with the 3GPP IAB specifications. We develop a version of the Maximum Weighted Matching (MWM) problem that can be applied on a spanning tree that represents the IAB network and whose complexity is linear in the number of IAB-nodes. The proposed solution is compared with state-of-the-art distributed approaches through end-to-end, full-stack system-level simulations with a 3GPP-compliant channel model, protocol stack, and a diverse set of user applications. The results show how that our scheme can increase the throughput of cell-edge users up to 5 times, while decreasing the overall network congestion with an end-to-end delay reduction of up to 25 times.
description: 30 pages, 10 figures. Please cite as M. Pagin, T. Zugno, M. Polese and M. Zorzi, "Resource Management for 5G NR Integrated Access and Backhaul: a Semi-centralized Approach," in IEEE Transactions on Wireless Communications, 2021
Vanishing environment-induced decoherence
Creators: name: Ou, Yong-Cheng
name: Fan, Heng
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: For a central system uniformly coupled to a XY spin-1/2 bath in a transverse field, we explicitly calculate the Loschmidt echo(LE) to characterize decoherence quantitatively. We find that the anisotropy parameter $γ$ affects decoherence of the central system sensitively when $γ\in [0,1]$% , in particular, the LE becomes unit without varying with time when $γ=0 $, implying that environment-induced decoherence vanishes . Some other cases in which the LE is unit are discussed also.
description: 4 pages, 2 figures
Pathogen identification by the 23S rRNA
Creators: name: Martins, Allan Cézar De Azevedo
Publisher: name: F1000Research
Year: 2015

description: Some pathogenic agents are classified in risk groups (A, B or C) accordingly to its outbreak spread and priority in a Bioterrorist act. Quickness and accuracy in pathogens identification are essential to a response. Our aim is identify v-regions which could be used to identify pathogens in species level using 23S rRNA sequences. We performed a multiple alignment of the sequences and identified 37 variable regions. V6, V27, V29, V30 and V34 variable regions present inner conserved regions. Moreover, the organisms were clustered by v-region, indicating two regions, the V2 and V18, as potential v-regions to specific identification.
Spin Down in Subgiant Stars: Tests of Physics and Main Sequence Braking Models
Creators: name: van Saders, Jennifer
Publisher: name: Zenodo
Year: 2021
Subjects: Post main sequence cool stars

description: The prospect of precise, rotation-based stellar ages drives the development of magnetic braking models for Sun-like stars. The vast majority of these magnetic braking laws have been calibrated on and for main sequence stars. While rotation-age relations lack the same utility on the subgiant branch, subgiant rotational behavior remains an excellent test of the underlying stellar evolutionary models and the magnetic braking prescriptions themselves. I will extend two different main sequence braking models onto the subgiant branch: a “standard” model in which angular momentum loss occurs smoothly over the entire main sequence, and the more recent “weakened” magnetic braking model, in which spin down halts roughly midway through the main sequence. I will show that subgiant rotation rates are a discriminating test of whether weakened braking actually occurs on the main sequence, with period predictions that can differ by greater than 50% from the standard case.
Phase transitions of barotropic flow coupled to a massive rotating sphere - derivation of a fixed point equation by the Bragg method
Creators: name: Lim, Chjan C.
name: Mavi, R. Singh
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The kinetic energy of barotropic flow coupled to an infnitely massive rotating sphere by an unresolved complex torque mechanism is approximated by a discrete spin-lattice model of fluid vorticity on a rotating sphere, analogous to a one-step renormalized Ising model on a sphere with global interactions. The constrained energy functional is a function of spin-spin coupling and spin coupling with the rotation of the sphere. A mean field approximation similar to the Curie-Weiss theory, modeled after that used by Bragg and Williams to treat a two dimensional Ising model of ferromagnetism, is used to find the barotropic vorticity states at thermal equilibrium for given temperature and rotational frequency of the sphere. A fixed point equation for the most probable barotropic flow state is one of the main results.
description: 31 pages, 6 figures
How does land use change affect ant biodiversity in different types of Cerrado vegetation?
Creators: name: Queiroz, Antonio Cesar Medeiros De
name: Ananza M. Rabello
name: Braga, Danielle L.
name: Graziele S. Santiago
name: Alves, Guilherme
name: Zurlo, Luana F.
name: Ribas, Carla R.
name: Philpott, Stacy M.
Publisher: name: F1000Research
Year: 2015

description: The simplification of native habitats leads to biodiversity decline in tropical terrestrial ecosystems. We evaluated how conversion of three types of native Cerrado vegetation (grassland, sensu stricto, and cerrado forest) to two land uses (pastures and Eucalyptus plantations) affects ant richness and composition. We expected lower richness and large compositional differences in the land use with larger structural differences than the native vegetation. We collected hypogaeic, epigaeic, and arboreal ants and sampled vegetation and soil characteristics. We found, for most comparisons and ant groups, strong declines in richness and changes in species composition with native habitat conversion. Ant richness was negatively correlated with tree height and circumference. Yet, it is likely that vegetation suppression in Eucalyptus plantations (that have tall trees) may be actually influencing ant richness. Grass cover positively correlated with hypogaeic and epigaic ant richness in land uses within the grassland vegetation type, while litter diversity and plant richness correlated with ant richness in land uses within sensu stricto and cerrado forest. Thus, the habitat characteristics that lead to increases in richness in human land uses within certain vegetation types (grass cover, tree variables) are characteristics typical of the native vegetation types. Such, changes caused by the conversion of native vegetation into pastures or Eucalyptus leads to formation of novel and species poor ecosystems that threaten the native biodiversity from the Cerrado biome (CAPES). (52nd ATBC Abstract – Queiroz et al. in prep. - 'Unpublished data' For more information, please contact us: queirozacm@gmail.com)
A method of estimation of the dynamical age of FR II-type radio sources from multifrequency data
Creators: name: Machalski, J.
name: Chyzy, K. T.
name: Stawarz, L.
name: Koziel, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose a new approach in determining ages of FR II type radio sources. We apply the assumed dynamical model of Kaiser et al. (1997) to a number of FR II type radio galaxies observed at different radio frequencies, and fit - for each frequency separately - the model free parameters to the observed sources' quantities. Such a procedure, using enlarged in fact a number of observables, enables us to determine relatively precise ages and other crucial characteristics of the analyzed sources. The resulting age estimates agree very well with those obtained by means of `classical' spectral ageing method for objects not older than 10 Myr, for which good-quality spectral data are available. The presented method is however also applicable in the case of the sources older than this, and/or the ones for which the only available low-resolution radio data do not allow for detailed spectral ageing studies. Our analysis indicates that the main factor precluding precise age determination for FR II type radio galaxies regards the poorly known shape of the initial electron energy distribution injected by the jet terminal shocks to the expanding lobes/cocoons. We briefly consider this issue, and conclude that the broad-band single power-law form assumed here may be accurate enough for the presented estimates, although most likely it does not strictly correspond to some well-defined realistic particle acceleration process. Instead, it should be considered as a simplest model approximation of the initial electron continuum, averaged over a very broad energy range and over the age of the source, with the effective spectral index which may be different for different sources.
description: 15 pages, 9 figures included. Accepted for publication in A&A
Effects of the 1988 Drought on Farm Finances
Creators: name: Whittaker, Gerald W.
name: Whittaker, Gerald W.
Publisher: name: Unknown
Year: 1990
Subjects: Agricultural and Food Policy
Crop Production/Industries
Financial Economics
Livestock Production/Industries

description: Following the 1988 drought, nine States in the Upper Midwest received 70 percent of Federal crop damage payments and 40 percent of the livestock feed disaster payments which were made through August 1989. Net farm income dropped in this region while rising in the rest of the country. However, farms in both the severe drought region and the rest of the country continued to improve their solvency position. The number of debt-free farms increased in the drought region, and the number of farms experiencing financial distress slightly decreased. Total direct Government payments (including disaster payments) and Commodity Credit Corporation (CCC) loans were lower in 1988 than in 1987. The average farm in the drought region survived financially by selling off inventories and by taking advantage of higher commodity prices to redeem CCC loans.
Time-Dependent Dephasing and Quantum Transport
Creators: name: Moreira, Saulo V.
name: Marques, Breno
name: Semião, Fernando L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The investigation of the phenomenon of dephasing assisted quantum transport, which happens when the presence of dephasing benefits the efficiency of this process, has been mainly focused on Markovian scenarios associated with constant and positive dephasing rates in their respective Lindblad master equations. What happens if we consider a more general framework, where time-dependent dephasing rates are allowed, thereby permitting the possibility of non-Markovian scenarios? Does dephasing assisted transport still manifest for non-Markovian dephasing? Here, we address these open questions in a setup of coupled two-level systems. Our results show that the manifestation of non-Markovian dephasing assisted transport depends on the way in which the incoherent energy sources are locally coupled to the chain. This is illustrated with two different configurations, namely non-symmetric and symmetric. Specifically, we verify that non-Markovian dephasing assisted transport manifested only in the non-symmetric configuration. This allows us to draw a parallel with the conditions in which time-independent Markovian dephasing assisted transport manifests. Finally, we find similar results by considering a controllable and experimentally implementable system, which highlights the significance of our findings for quantum technologies.
description: 11 pages, 10 figures. Close to published version
Προσεγγιστικές αβέβαιες κορυφογραμμές:
Creators: name: Κωνσταντίνου, Απόστολος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Αβεβαιότητα
Κορυφογραμμές
Προσεγγιστικότητα
Uncertainty
Skylines
Approximation

description: Σε αυτή την εργασία θα ασχοληθούμε με τα αβέβαια δεδομένα. Στο Κεφάλαιο 1 έχουμε μια συνοπτική περιγραφή του προβλήματος και τον ορισμό των αβέβαιων δεδομένων. Στο κεφάλαιο 2 παρουσιάζουμε προηγούμενες εργασίες πάνω στα αβέβαια δεδομένα. Στο κεφάλαιο 3 γίνεται μια παρουσίαση της δημοσίευσης των Afshani et al. πάνω στις προσεγγιστικές αβέβαιες κορυφογραμμές, που αποτελεί και τον πυρήνα αυτής της εργασίας. Τέλος στο κεφάλαιο 4 παρουσιάζουμε τα ανοικτά προβλήματα που υπάρχουν ακόμη πάνω στον τομέα των αβέβαιων δεδομένων.
description: In this paper we talk about uncertain data. In chapter 1 there is a brief description of the problem and the definition of uncertain data. In chapter 2 we present previous work on uncertain data. In chapter 3 we present the work of Afshani et al. on approximate uncertain skylines, that is the core of this paper. At last in chapter 4 we present open problems on uncertain data.
Building a logical model in the machining domain for CAPP expert systems
Creators: name: Kryssanov, V. V.
name: Kleshchev, A. S.
name: Fukuda, Y.
name: Konishi, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Recently, extensive efforts have been made on the application of expert system technique to solving the process planning task in the machining domain. This paper introduces a new formal method to design CAPP expert systems. The formal method is applied to provide a contour of the CAPP expert system building technology. Theoretical aspects of the formalism are described and illustrated by an example of know-how analysis. Flexible facilities to utilize multiple knowledge types and multiple planning strategies within one system are provided by the technology.
description: 25 pages, 4 figures. Preprint completed in 1997
Non-equilibrium, weak-field induced magnetism: a mechanism for magnetobiology
Creators: name: Matevosyan, Ashot
name: Allahverdyan, Armen E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: There is a long-time quest for understanding physical mechanisms of weak magnetic field interaction with biological matter. Two factors impeded the development of such mechanisms: first, a high (room) temperature of a cellular environment, where a weak, static magnetic field induces a (classically) zero equilibrium response. Second, the friction in the cellular environment is large, preventing a weak field to alter non-equilibrium processes such as a free diffusion of charges. Here we study a class of non-equilibrium steady states of a cellular ion in a confining potential, where the response to a (weak, homogeneous, static) magnetic field survives strong friction and thermal fluctuations. The magnetic field induces a rotational motion of the ion that proceeds with the cyclotron frequency. Such non-equilibrium states are generated by a white noise acting on the ion additionally to the non-local (memory-containing) friction and noise generated by an equilibrium thermal bath. The intensity of this white noise can be weak, i.e. much smaller than the thermal noise intensity.
description: 34 pages, 4 figures, published version
Towards more decentralised and consumer-centric electricity markets
Creators: name: Hayes, Barry
Publisher: name: Zenodo
Year: 2019

description: Present electricity markets are not flexible or decentralised enough to integrate massive numbers of distributed energy resources efficiently. Individual consumers and energy communities who have their own local energy resources are still required to purchase electricity from the grid under present regulations. Local energy production typically needs to be either self-consumed on-site, or sold to the grid at an unfavourable rate.
 This given rise to a surge of interest in more decentralised, “consumer-centric” electricity markets, and a number of research projects and startups in the area of Peer-to-Peer (P2P) energy trading via distributed ledger or blockchain technology. Several of these projects have included small-scale demonstration in local microgrids, or on private wires. However, it is not clear how these projects can be scaled up and what are the potential impacts on grid operation and planning.
 This talk will discuss a number of important questions in this area including:
 How to integrate P2P energy trading models with the existing electricity market and regulations?
 Can utility-owned infrastructure be used for P2P energy trading?
 What are the hardware, software, and communications requirements for implementing a P2P energy trading system?
 What is the optimal design for decentralised electricity markets?
Niederhauser's model for epilepsy and wavelet methods
Creators: name: Trevino, J. P.
name: Castillo, V. H.
name: Rosu, H. C.
name: Moran, J. L.
name: Murguia, J. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Wavelets and wavelet transforms (WT) could be a very useful tool to analyze electroencephalogram (EEG) signals. To illustrate the WT method we make use of a simple electric circuit model introduced by Niederhauser, which is used to produce EEG-like signals, particularly during an epileptic seizure. The original model is modified to resemble the 10-20 derivation of the EEG measurements. WT is used to study the main features of these signals
description: 9 pages, 5 figs, contribution at the Zacatecas miniworkshop organized by V. Dvoeglazov et al (1-2 Dec. 2005)
La rappresentazione cinematografica del mondo agropastorale nel documentario corto italiano (1939 - 1969)
The Filmic Representation of the Rural World in Italian Short Documentaries (1939 - 1969)
Creators: name: Iommi, Sara <1983>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: L-ART/06 Cinema, fotografia e televisione

description: L’obiettivo primario di questo lavoro è quello di esplorare un insieme di documentari corti italiani di tipo etnografico e sociologico. Questi film hanno ricevuto pochissima attenzione critica, mentre sono essenziali alla comprensione del periodo di storia italiana compreso fra gli ultimi anni del Regime fascista e la fine del “Miracolo economico”.

La prima parte della tesi è dedicata alla descrizione del contesto economico, sociologico, politico in cui questi lavori sono stati prodotti.

La seconda parte si concentra su circa un centinaio di documentari corti analizzati sulla base di tre  diversi criteri. Innanzitutto li abbiamo considerati a partire da un punto di vista autoriale, secondariamente a partire dalle loro caratteristiche produttive e distributive e infine sulla base di un criterio regionale.

A partire dalla discussione antropologica coeva riguardante la scomparsa dei mondi contadini e su una precisa ricerca d’archivio focalizzata sullo stesso tema, abbiamo poi comparato il risultato dell’analisi del corpus con altre forme filmiche di rappresentazione dello stesso soggetto.

Oltre a far riemergere un gruppo di autori e film quasi dimenticati, questo lavoro intende lanciare uno sguardo sul veloce, conflittuale e sbilanciato cambiamento compreso fra i mondi rurali tradizionali e la modernità, che ha caratterizzato la società italiana degli anni Cinquanta e Sessanta.
description: The primary goal of this work is to explore a group of italian ethnographic and sociological short documentary films. While they received no critical or little recognition, these films are indeed essential to the understanding of Italian history that goes from the last years of the Fascist Regime to the end of the so called Italian “economic miracle”.

The first part of this dissertation is dedicated to describe the economical, sociological and political context within which these works have been produced.

The second part focuses on the analysis of nearly one hundred short documentaries, based on a three-fold methodology. Firstly, I consider these works from an authorial point of view. Secondly, I focus on production and distribution issues, and finally I examine the corpus using a regional criteria.

Building on the coeval anthropological discussion regarding the disappearance of the rural worlds and on a focused and in-depth archival research, I compare the corpus' analysis results with other forms of filmic representations about the same subject.

In addition to casting a light on a nearly forgotten group of authors and films, this work provides a valuable insights on the fast, conflicting and unbalanced transition between the traditional rural world and the modernity characterizing the Italian society between the Fifties and the Sixties.
Study of the Rho-pi Puzzle in Charmonium Decays
Creators: name: Mo, X. H.
name: Yuan, C. Z.
name: Wang, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The theoretical explanations about the ``Rho-pi puzzle'' in charmonium decays are reviewed extensively, and the comparison of theoretical predications with experimental data is made whenever possible. Three methods to estimate the ratio of the branching fractions of J/psi and psi' decays are also discussed. It is pointed out that in order to understand the Rho-pi puzzle, and the dynamics of charmonium decays, systematic studies should be made in theory, phenomenology and experiment aspects.
description: 13 pages
Characteristics of Agricultural Work Force Households, 1987
Creators: name: Oliveira, Victor J.
name: Cox, E. Jane
name: Oliveira, Victor J.
name: Cox, E. Jane
Publisher: name: Unknown
Year: 1990
Subjects: Consumer/Household Economics
Labor and Human Capital

description: There were almost 5.4 million agricultural work force households (households in which some member does farmwork at some time during the year) in 1987, down 4.1 percent from 1985. About two-thirds of agricultural work force households depend little on farmwork for employment, according to the 1987 Agricultural Work Force Survey. Those most affected by farm job loss would be the 1.5 million high-dependence households in which the head is primarily employed at farmwork. While most agricultural work force households are in the Eastern United States, the West has a greater proportion of households highly dependent on agriculture. This report provides national- and regional-level information on the number and characteristics of agricultural work force households, the persons living in these households, and the degree to which they depend on agriculture for employment.
A comprehensive database of cell-type specific marker genes for the mammalian brain
Creators: name: Ogan Mancarcı
name: Lilah Toker
name: Shreejoy Tripathy
name: Pavlidis, Paul
Publisher: name: F1000Research
Year: 2015

description: Large-scale gene expression analysis have improved our understanding of the pathophysiology of complex psychiatric and neurodegenerative disorders like schizophrenia and Huntington's. Nevertheless, interpreting changes in gene expression in bulk tissue from human post-mortem brains can be misleading, since such changes may stem from alterations in cellular composition often observed in neuropsychiatric disorders. Such changes could potentially be inferred from the expression of cell-type specific marker genes, however, reliable marker genes do not currently exist for the majority of brain cell-types.

Here we develop and apply a computational approach to identify marker genes in neural cell types using cell type specific microarray data gathered across multiple datasets. We also use computational methods to use these newly established marker genes to inform cellular proportions in human brains.
Restart of accelerated first order methods with linear convergence under a quadratic functional growth condition
Creators: name: Alamo, Teodoro
name: Krupa, Pablo
name: Limon, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Accelerated first order methods, also called fast gradient methods, are popular optimization methods in the field of convex optimization. However, they are prone to suffer from oscillatory behaviour that slows their convergence when medium to high accuracy is desired. In order to address this, restart schemes have been proposed in the literature, which seek to improve the practical convergence by suppressing the oscillatory behaviour. This paper presents a restart scheme for accelerated first order methods for which we show linear convergence under the satisfaction of a quadratic functional growth condition, thus encompassing a broad class of non-necessarily strongly convex optimization problems. Moreover, the worst-case convergence rate is comparable to the one obtained using a (generally non-implementable) optimal fixed-rate restart strategy. We compare the proposed algorithm with other restart schemes by applying them to a model predictive control case study.
description: Accepted version of the article published in IEEE Transactions on Automatic Control (8 pages, 1 figure)
Η συμβολή της ηρέμησης ή/και της γενικής αναισθησίας στη διάγνωση της ρήξης του πρόσθιου χιαστού συνδέσμου και της δυσπλασίας του ισχίου στον σκύλο.:
Creators: name: Κωνσταντίνου, Λοΐζος Χριστάκη
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Διάγνωση
Χιαστός
Δυσπλασία
Diagnosis
Cruciate
Dysplasia

description: Η παρούσα εργασία μελετά τη συμβολή της χορήγησης ηρέμησης ή/και γενικής αναισθησίας στην διάγνωση της ρήξης του πρόσθιου χιαστού συνδέσμου (ΡΠΧΣ) και της δυσπλασίας του ισχίου (ΔΙ). Η μελέτη πραγματοποιήθηκε στην Κλινική Ζώων Συντροφιάς του Τμήματος Κτηνιατρικής του Α.Π.Θ. κατά το ακαδημαϊκό έτος 2011-12. Συνολικά συμπεριλήφθηκαν 27 σκύλοι, σε 12 από τους οποίους διαγνώστηκε ΡΠΧΣ και σε 15 ΔΙ. Για τον σκοπό της εργασίας σε όλα τα ζώα έγινε ορθοπαιδική εξέταση, αρχικά σε εγρήγορση και, ακολούθως, μετά τη χορήγηση ηρέμησης ή/και γενικής αναισθησίας. Λόγω του τρόπου λειτουργίας της Κλινικής ήταν να αδύνατο να τηρηθεί ένα σταθερό αναισθητικό πρωτόκολλο για όλα τα ζώα. Για την ομάδα με ΡΠΧΣ μείζονος σημασίας ήταν οι δοκιμές της προσθιοπίσθιας συρταρωτής κίνησης και η δοκιμή συμπίεσης της κνήμης, ενώ για την ομάδα με ΔΙ η δοκιμή Ortolani. Τα αποτελέσματα της ορθοπαιδικής εξέτασης καταγράφηκαν σε ειδικό έντυπο. Από την ανάλυση των αποτελεσμάτων προέκυψε ότι η χορήγηση ηρέμησης ή/και γενικής αναισθησίας συμβάλει σημαντικά στη διάγνωση της ΡΠΧΣ (θετική δοκιμή συρταρωτής κίνησης του γόνατος και δοκιμή συμπίεσης της κνήμης) και της ΔΙ (θετική δοκιμή Ortolani).
description: The present study examines the contribution of sedation and/or general anesthesia in the diagnosis of cranial cruciate ligament rupture (CrCLR) and hip dysplasia (HD). The study was conducted in the Companion Animal Clinic, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Greece, during the academic year 2011-12. In total, 27 dogs were included in the study, 12 of whom were diagnosed with CrCLR and 15 with HD. All animals were initially examined while being alert, followed by examination under sedation and/or general anesthesia. Due to the clinic’s mode of operation it was not possible to apply a common anesthetic protocol for all animals. Major emphasis was given in cranial drawer test of the stifle and tibial compression test, or Ortolani test for the dogs suffered CrCLR or HD, respectively. The results of the orthopedic examination were recorded on a special form. Data analysis showed that sedation and/or general anesthesia contribute to CrCLR and HD diagnosis
Distributed Initialization Algorithms for Single-Hop Ad Hoc Networks with Minislotted Carrier Sensing
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 100503 Computer Communications Networks
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: An ad hoc network is a self-organized and distributed entity, consisting of n mobile stations (MSs) without the coordination of any centralized access point. Initialization is one of the fundamental tasks to set up an ad hoc network, which involves assigning each of the n MSs a distinct ID number from 1 to n, distributedly. In [1], randomized initialization protocols are developed for single-hopad hoc networks under different conditions. However, carrier sensing has not been utilized and suitable acknowledgment schemes for the algorithms are not developed. Moreover, the assumption taken in [1] about MSs being able to listen while transmitting is not valid for ad hoc networks. In this context, we describe two algorithms for initializing an ad hoc network with carrier sensing capability. First, a novel acknowledgment scheme is proposed for notifying a transmitting MS whether its transmission is successful during the initialization. Then, two distributed and randomized initialization algorithms are developed and analyzed, under the assumptions of a known and unknown number of users in the network, respectively. Both algorithms are obtained based on optimizing some keyparameters to minimize the total time required to complete the initialization. Both theoretical analysis and simulations indicate that the proposed initialization algorithms outperform the existing methods, in the sense that they take much less time to complete the initialization and the average number of transmission attempts before success is much smaller.