cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
31881: Social hibernating and WFH
Creators: name: Project, Lockdown2020 and Beyond
Publisher: name: University of Oxford
Year: 2023
Subjects: classificationCode: 479999
subject: Other language, communication and culture not elsewhere classified

description: I live in a small one bedroom flat with my husband, we don't have a garden but are lucky enough to live near to one of Reading's larger parks. My husband and I maintain a divide during the day, he makes use of his favourite spot on the kitchen counter, an archaeologist by trade, he purchased a large piece of lino so he can lay out grubby roman nails which were delivered a day into his WFH. He was furloughed a few weeks back and is spending his 'leisure time' writing up postdoctoral applications now. My haunt is my desktop in the living room, where I try to concentrate on my days work (usually some form of data entry). Our online teams coffee brake sessions once a week are a welcome time to interact with colleagues I now haven't seen in person for over a month. Being library staff has meant a lot of my work has been put on pause. I can't access things for binding, I can't shelf check and my duties helping readers at the desk have been (obviously) curtailed. I got to assist a researcher who was publishing COVID-19 research last week, which was gratifying. I've learnt a new appreciation for our local park, discovering hidden walkways under the trees and tracking the progress of the spring flowers. I go out for an walk come rain or shine, making good use of the wellies I bought during a flood-time a few years back. I've also finally decided to buy a fold-up pedal machine to help with my legs (I have bad knees). I might even come out of lock-down fitter than I went in! I'm not really struggling for things to do in my leisure time like others seem to be. Nor do I feel I've adjusted my time much. My hobbies have always been internet or literary based. I meet friends online each week for RPGs as always. We've also organised a massive Discord server to replicate our in-person meetups and organise online board-games. One of our friends has created a face-to-face chat room which we go to every Saturday at 11:30 to see how people are. If it weren't for the fact that we have to shop alone at Tesco it wouldn't feel all that different from my usual weekends. Though now all my conversations are ended with the words 'stay safe' and the facetious command 'and wash your hands!'
Empirical stationary correlations for semi-supervised learning on graphs
Creators: name: Xu, Ya
name: Dyer, Justin S.
name: Owen, Art B.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: In semi-supervised learning on graphs, response variables observed at one node are used to estimate missing values at other nodes. The methods exploit correlations between nearby nodes in the graph. In this paper we prove that many such proposals are equivalent to kriging predictors based on a fixed covariance matrix driven by the link structure of the graph. We then propose a data-driven estimator of the correlation structure that exploits patterns among the observed response values. By incorporating even a small fraction of observed covariation into the predictions, we are able to obtain much improved prediction on two graph data sets.
description: Published in at http://dx.doi.org/10.1214/09-AOAS293 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Signal coupling and signal integrity in multi-strip Resistive Plate Chambers used for timing applications
Creators: name: Gonzalez-Diaz, Diego
name: Chen, Huangshan
name: Wang, Yi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We have systematically studied the transmission of electrical signals along several 2-strip Resistive Plate Chambers (RPCs) in the frequency range $f=0.1-3.5$GHz. Such a range was chosen to fully cover the bandwidth associated to the very short rise-times of signals originated in RPCs used for sub-100ps timing applications. This work conveys experimental evidence of the dominant role of modal dispersion in counters built at the 1 meter scale, a fact that results in large cross-talk levels and strong signal shaping. It is shown that modal dispersion appears in RPCs due to the intrinsic unbalance between the capacitive and the inductive coupling $C_m/C_o \neq L_m/L_o$. A practical way to restore this symmetry has been introduced (hereafter `electrostatic compensation'), allowing for a cross-talk suppression factor of around $\times 12$ and a rise-time reduction by 200ps. Under conditions of compensation the signal transmission is only limited by dielectric losses, yielding a length-dependent cutoff frequency of around 1GHz per 2 meter for typical float glass -based RPCs ($\tan δ|_{glass} = 0.025\pm0.005$). It is further shown that `electrostatic compensation' can be achieved for an arbitrary number of strips as long as the nature of the coupling is `short-range', that is an almost exact assumption for typical strip-line RPCs. Evidence for deviations from the dominant TEM propagation mode has been observed, although they seem to have negligible influence in practical signal observables. This work extends the bandwidth of previous studies by a factor of almost $\times 20$.
description: submitted to NIM
Inference and Estimation for Random Effects in High-Dimensional Linear Mixed Models
Creators: name: Law, Michael
name: Ritov, Ya’acov
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Molecular Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: We consider three problems in high-dimensional linear mixed models. Without any assumptions on the design for the fixed effects, we construct asymptotic statistics for testing whether a collection of random effects is zero, derive an asymptotic confidence interval for a single random effect at the parametric rate n, and propose an empirical Bayes estimator for a part of the mean vector in ANOVA type models that performs asymptotically as well as the oracle Bayes estimator. We support our theoretical results with numerical simulations and provide comparisons with oracle estimators. The procedures developed are applied to the Trends in International Mathematics and Sciences Study (TIMSS) data. Supplementary materials for this article are available online.
Undulation instability in a bilayer lipid membrane due to electric field interaction with lipid dipoles
Creators: name: Bingham, Richard J.
name: Olmsted, Peter D.
name: Smye, Stephen W.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Bilayer lipid membranes [BLMs] are an essential component of all biological systems, forming a functional barrier for cells and organelles from the surrounding environment. The lipid molecules that form membranes contain both permanent and induced dipoles, and an electric field can induce the formation of pores when the transverse field is sufficiently strong (electroporation). Here, a phenomenological free energy is constructed to model the response of a BLM to a transverse static electric field. The model contains a continuum description of the membrane dipoles and a coupling between the headgroup dipoles and the membrane tilt. The membrane is found to become unstable through buckling modes, which are weakly coupled to thickness fluctuations in the membrane. The thickness fluctuations, along with the increase in interfacial area produced by membrane buckling, increase the probability of localized membrane breakdown, which may lead to pore formation. The instability is found to depend strongly on the strength of the coupling between the dipolar headgroups and the membrane tilt as well as the degree of dipolar ordering in the membrane.
description: 29 pages 8 figs
Rotational symmetry and degeneracy: a cotangent-perturbed rigid rotator of unperturbed level multiplicity
Creators: name: Alvarez-Castillo, D. E.
name: Compean, C. B.
name: Kirchbach, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We predict level degeneracy of the rotational type in diatomic molecules described by means of a cotangent-hindered rigid rotator. The problem is shown to be exactly solvable in terms of non-classical Romanovski polynomials. The energies of such a system are linear combinations of t(t+1) and 1/[t(t+1)+1/4] terms with the non-negative integer principal quantum number t=n+|/bar{m}| being the sum of the degree n of the polynomials and the absolute value, |/bar{m}|, of the square root of the separation constant between the polar and azimuthal motions. The latter obeys, with respect to t, the same branching rule, |/bar{m}|=0,1,..., t, as does the magnetic quantum number with respect to the angular momentum, l, and, in this fashion, the t quantum number presents itself indistinguishable from l. In effect, the spectrum of the hindered rotator has the same (2t+1)-fold level multiplicity as the unperturbed one. For small t values, the wave functions and excitation energies of the perturbed rotator differ from the ordinary spherical harmonics, and the l(l+1) law, respectively, while approaching them asymptotically with increasing t. In this fashion the breaking of the rotational symmetry at the level of the representation functions is opaqued by the level degeneracy. The model provides a tool for the description of rotational bands with anomalously large gaps between the ground state and its first excitation.
description: 10 pages, 6 figures; Molecular Physics 2011
Quality control and quality assurance in hybrid mass timber high-rise construction : a case study of the Brock Commons
Creators: name: Calderon, Francisco
Publisher: name: University of British Columbia
Year: 2018

description: Wood has seen a resurgence recently as a construction material driven by technological advances and a growing concern for the environment. Although an increasing amount of mass timber high-rises are being built all around the world, lack of information and outdated preconceptions are some of the obstacles that are keeping mass timber products from increasing their market share in high-rise construction. Academia and industry leaders must keep track of the progress that is being made and inform the general public as innovation and technological advances continue to take place. In this context, the University of British Columbia has recently completed the construction of the Brock Commons Tallwood House. This 18-story residence building employs two reinforced concrete cores and a mass timber structure composed of cross laminated timber panels, glued-laminated columns, and parallel strand lumber columns. With this, the building is currently the tallest wood building in the world and a testament to the suitability of engineered wood elements for high-rise construction. Aiming to address the lack of information surrounding mass timber high rise construction, this thesis documents the quality assurance (QA) and quality control (QC) practices that were put in place during the delivery of the building. The main objective of this research was to identify and present lessons learned from the application of these QA/QC practices. To do this, various QA/QC practices were identified and analyzed by reviewing the project specifications and other project documents, reviewing recognized industry standards, and interviewing various members of the project team. This study found a series of comprehensive and well-planned QA/QC practices that were put in place by the project team and that were appropriate to comply with the project requirements. This study concluded that most of these practices are replicable and advisable for future projects. The different QA/QC practices that were identified and the lessons learned from their application are presented in this thesis.
The effect of selection on casein genetic polymorphisms and haplotypes in Italian Holstein cattle
Creators: name: Chessa, Stefania
name: Gattolin, Stefano
name: Cremonesi, Paola
name: Soglia, Dominga
name: Finocchiaro, Raffaella
name: Van Kaam, Jan-Thijs
name: Marusi, Maurizio
name: Civati, Giorgio
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Evolutionary Biology
subject: Cancer

description: Milk protein genes are known to be highly polymorphic. Several studies have shown the influence of milk proteins genetic variants and casein haplotypes on milk nutritional and technological properties. From 1990, the analysis of caseins polymorphism gained new attention due to the concern about possible negative effects of CSN2*A1 on human health. As a consequence, the CSN2*A2 variant gained interest and milk produced by with A2A2 β-casein cows is now available in different countries. Aim of the present paper was to analyse how casein variants’ and haplotypes’ frequencies changed in the Italian Holstein breed, due to the health ‘claims’ about CSN2*A2, and the possible effects on milk technological properties. Data were compared also with Italian Jersey cattle. A total of 223,655 Holstein and of 622 Jersey were genotyped using Illumina beadchips and data of 62 SNP in the casein cluster were analysed to reconstruct casein genotypes and haplotypes. The results demonstrate that although the selection towards β-casein A2 is not so effective in Italy, an increase of the frequency of this allele to the disadvantage of A1 and B alleles, included in the most favourable genotypes and haplotypes for cheese making, is occurring and should not be forced. Indeed, although a selection for the favourable κ-casein B allele, and against the unfavourable E allele, is occurring and is limiting the general loss of haplotypes associated with good technological properties, the sharp decrease of the favourable B-B and I-B β- κ-haplotypes, is an alert of the risk of losing useful biodiversity.HighlightsAfter the concern about the β-caseinA1 variant on human health, a selection favoring the A2 allele was carried out in different countries.In Italy milk is mostly destined to cheese-making and even without a direct selection for theβ-casein A2 caseins allelic frequencies are changing.Genotyping data should be used to monitor and maybe contrast the reduction of variants associated with milk favorable technological properties. After the concern about the β-caseinA1 variant on human health, a selection favoring the A2 allele was carried out in different countries. In Italy milk is mostly destined to cheese-making and even without a direct selection for theβ-casein A2 caseins allelic frequencies are changing. Genotyping data should be used to monitor and maybe contrast the reduction of variants associated with milk favorable technological properties.
Anomalous magnetic anisotropy of the topmost surface layer of Ni(110)
Creators: name: Busch, Marco
name: Lienemann, Jens
name: Potthoff, Michael
name: Winter, Helmut
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The orientation of the magnetization of a Ni(110) surface was investigated using techniques with different probing depths. By making use of electron capture into excited states of fast He atoms, we found that the magnetization of the topmost surface layer is not aligned along the easy axes of Ni. However, for a 50 ML film Fe on Ni(110) we observed the magnetization of the topmost Fe surface layer is along the easy axes of Fe.
description: 4 pages, 5 figures, PRB rapid (in press)
Spatially resolved ultrafast transport current in GaAs photoswitches
Creators: name: Prechtel, L.
name: Manus, S.
name: Schuh, D.
name: Wegscheider, W.
name: Holleitner, A. W.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We apply a pump- and probe-scheme to coplanar stripline circuits to investigate the photocurrent response of GaAs photoswitches in time and space. We find a displacement current pulse, as has been reported earlier. A time-delayed second pulse is interpreted by a transport current. A time-of-flight analysis allows us to determine the velocity of the photogenerated charge carriers in the transport current. It exceeds the Fermi and the single-particle quantum velocities. This suggests that the excitation of a collective electron-hole plasma and not single charge-carriers dominates the ultrafast transport current in GaAs photoswitches.
description: 10 pages, 3 figures
Diversity of breeding practices is linked to the use of collective tools for the genetic management of the Corsican sheep breed
Creators: name: Perucho, Lola
name: Paoli, Jean-Christophe
name: Ligda, Christina
name: Moulin, Charles-Henri
name: Hadjigeorgiou, Ioannis
name: Lauvie, Anne
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Evolutionary Biology
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: For breeding schemes based on a diversity of production systems, there is a growing challenge in combining standardised tools for the collective genetic improvement of a breed and the selection of a flock able to respond to the specific constraints of the farm and the farmer’s objectives. In order to progress on this question, it is necessary to gain better knowledge of how farmers who use one or several of these tools select the future breeding animals of their flocks, and the conditions under which they use these collective tools. We took the example of dairy sheep farming in Corsica (France) and of two collective tools for the Corsican breed’s management: the use of milk recording data within and outside of the breeding scheme and the buying of rams from the breeding scheme’s cooperative. The tools’ use and perception were described by means of interviews with farmers (n = 40). Cross-analysis of farms’ descriptors and the use of collective tools was performed by statistical analysis using available databases on dairy sheep flocks in Corsica. A diversity of breeding practices was associated to the use of milk recording data and to the purchase of rams sold by the breeding scheme’s cooperative. Flock size, milking method and type of land use influenced these breeding practices and the adoption or mistrust of a collective genetic improvement tool. Dissemination of genetic progress through rams from the breeding scheme is possible, provided that a diversity of breeding practices and production environments is represented in the nucleus flocks.HighlightsParticipating in the breeding scheme of the Corsican breed did not hinder the use of various replacement and culling practices in dairy sheep farmsModalities of use of the milk recording tool are multiple and driven by work organisation, perception of the breeding scheme and the farm projectRams sold by the breeding scheme’s cooperative are present in several commercial farms with varying characteristics Participating in the breeding scheme of the Corsican breed did not hinder the use of various replacement and culling practices in dairy sheep farms Modalities of use of the milk recording tool are multiple and driven by work organisation, perception of the breeding scheme and the farm project Rams sold by the breeding scheme’s cooperative are present in several commercial farms with varying characteristics
Inference and Estimation for Random Effects in High-Dimensional Linear Mixed Models
Creators: name: Law, Michael
name: Ritov, Ya’acov
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: We consider three problems in high-dimensional linear mixed models. Without any assumptions on the design for the fixed effects, we construct asymptotic statistics for testing whether a collection of random effects is zero, derive an asymptotic confidence interval for a single random effect at the parametric rate n, and propose an empirical Bayes estimator for a part of the mean vector in ANOVA type models that performs asymptotically as well as the oracle Bayes estimator. We support our theoretical results with numerical simulations and provide comparisons with oracle estimators. The procedures developed are applied to the Trends in International Mathematics and Sciences Study (TIMSS) data.
Shock waves in strongly coupled plasmas II
Creators: name: Khlebnikov, Sergei
name: Kruczenski, Martin
name: Michalogiorgakis, Georgios
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In a recent paper we have analyzed the AdS/CFT duals to shock waves propagating in the N=4 plasma. Here we study further properties of the system. In the gravity description we consider the properties of the dual black holes, showing in particular that they are stationary black holes with expanding horizons. This is possible because the horizon is not compact; in the fluid, this corresponds to the situation when entropy is being produced and carried away to infinity. We also consider shocks in dimensionalities d other than four and find that, for plasmas whose duals are given by asymptotically AdS spaces, the exponential tail of the shock on the supersonic side shrinks as gamma^(-2/d) as the velocity approaches the speed of light (the Lorentz factor gamma goes to infinity). This generalizes the behavior gamma^(-1/2) we have found previously for d=4. Finally, we consider corrugations of the shock front and show that the shock is stable under such perturbations. There are, however, long lived modes, excitations of which describe generation of sound by the shock wave, the energy for this being provided by the incoming fluid.
description: 42 pages, 7 figures
GEOGRAFIYA TA'LIMINING DOLZARB MASALALARI
Creators: name: D.Mo'minov, M.Vahobova.  Qo'qon DPI.
Publisher: name: Zenodo
Year: 2023

description: Mazkur ishda geografiya ta'limining bugungi kun talablari va muammolari yoritilgan. Shu bilan birga ta'lim jarayonining yoshlar tarbiyasidagi ahamiyati, ma'naviy, ijtimoiy va iqtisodiy jihatlari haqida ma'lumotlar berilgan.
Heritability estimates of enteric methane emissions predicted from fatty acid profiles, and their relationships with milk composition, cheese-yield and body size and condition
Creators: name: Bittante, G.
name: Cecchinato, A.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Ecology
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: Plant Biology
subject: Computational Biology

description: In the present study we estimated the genetic parameters of enteric methane emissions (EME) traits predicted from milk fatty acid profile (FA) and those of their predictors in 1,091 Brown Swiss cows reared on 85 farms in order to assess the potential of using EME-related phenotypes in selective breeding. Univariate and bivariate genetic models were fitted in a Bayesian framework. The means of the marginal posterior distribution of intra-herd heritability ranged from 0.12 for estimated methane production (g/d/cow) to 0.24 for estimated methane yield (g/kg dry matter intake [DMI]), with intermediate values for estimated methane intensity, increasingly higher when expressed per kg of corrected milk (0.13), fresh cheese (0.16), or cheese solids (0.20). Regarding the correlations, the milk quality traits and percentage cheese yields were generally moderately correlated with the estimated EME traits, and were variable in terms of sign. Daily milk and cheese yield traits were, as expected, all highly positively correlated with estimated daily methane production. In contrast, they were negatively correlated with estimated methane yield and intensity, the estimates being large in the case of phenotypic and herd correlations, and low in the case of additive genetic and residual correlations. With the exception of the negative correlations with daily methane production, EME traits exhibited trivial correlations with body size and BCS of cows, which, in turn, were negatively correlated with milk yield. Although the results should be validated on a larger population and different breeds, our study demonstrate the presence of additive genetic variation of EME traits, which could be exploited in breeding programmes for the improvement in both milk production and the ecological footprint of dairy farming.HighlightsEnteric methane emissions (EME) of dairy cows can be estimated on the basis of milk fatty acid profile.EME exhibited exploitable genetic variation.Genetic selection could be preferentially based on predicted methane intensity per kg of milk, or per kg of cheese in countries where milk production is used mainly for cheese-making. Enteric methane emissions (EME) of dairy cows can be estimated on the basis of milk fatty acid profile. EME exhibited exploitable genetic variation. Genetic selection could be preferentially based on predicted methane intensity per kg of milk, or per kg of cheese in countries where milk production is used mainly for cheese-making.
A modern Fizeau experiment for education and outreach purposes
Creators: name: Morizot, Olivier
name: Sellé, Adrien
name: Ferri, Sandrine
name: Guyomarc'H, Didier
name: Laugier, Jean-Marie
name: Knoop, Martina
Publisher: name: arXiv
Year: 2010
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: On the occasion of the laser's 50th anniversary, we performed a modern Fizeau experiment, measuring the speed of light with a laser beam passing over the city centre of Marseille. For a round trip distance of almost five kilometers, the measurement has reached an uncertainty of about 10$^{-4}$, mainly due to atmospheric fluctuations. We present the experimental and pedagogical challenges of this brilliant outreach experiment.
description: accepted by Eur J Phys in november 2010
A video-based preference assessment of social stimuli
Creators: name: Service, Lynn
Publisher: name: University of British Columbia
Year: 2018

description: Research on social stimuli preference assessments has largely used pictorial depictions of social stimuli (Kelly, Roscoe, Hanley, & Schlichenmeyer, 2014; Lang et al., 2014). However, social stimuli are dynamic and the use of videos may better portray the nuances of social stimuli (Snyder, Higbee, & Dayton, 2012). The purpose of the current study was to evaluate a 3-step process to identify reinforcing social stimuli (i.e., a semi-structured interview, a video-based preference assessment, and a reinforcer assessment). Six children aged 2- to 7-years old participated in the study. Two participants had a diagnosis of Autism Spectrum Disorder, one had a diagnosis of Autism Spectrum Disorder and Attention-Deficit Hyperactivity Disorder, and three were typically developing. The experimenter conducted a video-based, paired-choice preference assessment in which two videos of different social stimuli played simultaneously. The rate of responding for high- and low-preference social stimuli was assessed during baseline and a progressive and/or fixed ratio schedule of reinforcement. Four participant’s participation was terminated before full data sets could be collected due to engagement in problem behaviour. Two participants were able to complete full data sets; however, both required modifications to the original method to do so. The results of the study will be discussed in terms of clinical implications and considerations for future research.
O'ZBEKISTON TABIIY BOYLIKLARINI MUHOFAZA QILISHDA  EKOLOGIK TARBIYA MASALALARI
Creators: name: D.G'.Mo'minov, M.G'ulomjonov.  Qo'qon DPI.  E.G'.Mo'minova, Uchko'prik tumani  16-maktab biologiya fani o'qituvchisi.
Publisher: name: Zenodo
Year: 2023

description: Mazkur maqolada tabiiy resurslar va ularda samarali foydalanish to'g'risida ma'lumot berilgan. O'zbekiston tabiiy resurs imkoniyati va ularni muhofaza qilish, aholining ekologik madaniyatini shakllantirish masalalari yoritilgan.
Таянч сўзлар: ekologiya, geoekologiya, tabiiy resurs, qishloq xo'jaligi, ekologik tarbiya, yer resurslari, landshaft, tabiiy fanlar.
Nature of Split Hubbard Bands at Low Densities
Creators: name: Hansen, Daniel
name: Perepelitsky, Edward
name: Shastry, B Sriram
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a numerical scheme for the Hubbard model that throws light on the rather esoteric nature of the Upper and Lower Hubbard bands that have been invoked often in literature. We present a self consistent solution of the ladder diagram equations for the Hubbard model, and show that these provide, at least in the limit of low densities of particles, a vivid picture of the Hubbard split bands. We also address the currently topical problem of decay of the doublon states that are measured in optical trap studies, using the ladder scheme and also by an exact two particle calculation of a relevant Greens function.
description: 16 pages, 14 figures
A Reappraisal of the Electric Dipole Moment Enhancement Factor for Thallium
Creators: name: Nataraj, H. S.
name: Sahoo, B. K.
name: Das, B. P.
name: Mukherjee, D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The electric dipole moment (EDM) enhancement factor of atomic Tl is of considerable interest as it has been used in determining the most accurate intrinsic electron EDM limit to date. However, the value of this quantity varies from $-179$ to $-1041$ in different approximations. In view of the large uncertainties associated with many of these calculations, we have employed the relativistic coupled-cluster theory with single and double excitations and a subset of leading triple excitations and obtained the EDM enhancement factor of Tl as $-466$, which in combination with the most accurate measured value of Tl EDM yields $2.0 \times 10^{-27}\,{\mathrm e\,cm}$ as the new upper limit for the EDM of the electron. The importance of all-order correlation effects is emphasized and their trends are compared with those of two other ab initio calculations.
description: 4 pages, 4 tables, 2 figures
Effect of milk vs. sugar-sweetened beverage supplementation on bone development in pre-pubertal pigs as model for children
Creators: name: Batty, Brandon
name: Kutzler, Michelle
name: Campbell, Scott
name: Turner, Russell
name: Bionaz, Massimo
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy

description: Milk consumption has long been associated with better bone development in children, contrary to sugar-sweetened beverages (SSB); however, stronger evidence are needed. Therefore, this study aimed to use a pig model for growing children to evaluate the effect of milk vs. SBB consumption on the developing skeleton. For this, we used 24 pre-pubertal pigs (12 in Experiment 1, 8 males and 4 females, and 12 in Experiment 2, all males) randomly split into two groups to receive up to 750 mL of whole milk supplementation or an isocaloric maltodextrin solution (as SSB) for 13 or 11 weeks. Ultrasonography was used throughout the trial to record in vivo bone growth. The pigs were euthanised, and bones of the appendicular skeleton and the mandible were collected and measured with Dual X-Ray Absorptiometry (DEXA). A three-point bending test was used for biomechanical testing. After fracture, the cortical bone thickness was measured at three regions of the femur. Of the DEXA measurements taken, only the bone mineral density of the mandible was lower in pigs receiving milk vs. SSB. Compared to SSB, pigs consuming milk had also a larger occlusal surface thickness indicating lower teeth grinding, suggesting a calming effect of the milk. There was no difference in any biomechanical tests. In femur, the medial cortical was thicker in the SSB group, while the lateral cortical was thicker in the group receiving milk. Overall, there appears to be no effect of short-term milk supplementation on bone growth, mineral density and strength.HighlightsLarger bone density and size was observed in male vs. female before puberty.Three cups of whole milk per day for 3 months did not improve bone density and strength compared to isoenergetic sugar-sweetened beverage in prepubertal pigs used as model for growing children despite higher amount of calcium in the diet.Lower bone density in the ramus of the mandible and less teeth grinding indicated a reduced stress in the animals feed with milk. Larger bone density and size was observed in male vs. female before puberty. Three cups of whole milk per day for 3 months did not improve bone density and strength compared to isoenergetic sugar-sweetened beverage in prepubertal pigs used as model for growing children despite higher amount of calcium in the diet. Lower bone density in the ramus of the mandible and less teeth grinding indicated a reduced stress in the animals feed with milk.
Marathousa 2: A New Middle Pleistocene Locality in the Megalopolis Basin (Greece) With Evidence of Hominin Exploitation of Megafauna (Hippopotamus)
Creators: name: Konidaris, George
name: Tourloukis, Vangelis
name: Boni, Georgia
name: Athanassiou, Athanassios
name: Giusti, Domenico
name: Thompson, Nicholas
name: Syrides, George
name: Panagopoulou, Eleni
name: Karkanas, Panagiotis
name: Harvati, Katerina
Publisher: name: PaleoAnthropology
Year: 2023

description: In this article we present the new open-air Middle Pleistocene locality Marathousa 2, which was discovered during a double intensive and targeted field survey in the lignite mines of the Megalopolis basin (Greece). The locality is situated just below the Lignite Seam III of the Marathousa Member (Choremi Formation), and its similar stratigraphic position with the chronologically well-constrained locality Marathousa 1 (dated between 500 and 400 ka and correlated to the Marine Isotope Stage 12) indicates a comparable age for Marathousa 2. The locality most notably yielded dental and postcranial remains of Hippopotamus, with those found at the locality’s Area A most likely belonging to a single individual. The dimensions of the dental elements support an attribution to H. antiquus, a large-sized taxon, almost twice as large as the recent common H. amphibius, and with strong aquatic habits. Cut marks identified on a thoracic vertebra indicate hominin butchering of the carcass. Preliminary paleoenvironmental remarks based on the mammal and mollusk fauna, indicate that hominin activities took place at the margins of or near a perhaps cold freshwater water body, but with temperatures that allowed its persistence throughout the year, and perhaps under drier conditions compared to preceding and succeeding periods in the basin. In addition to the exploitation of elephants in Marathousa 1, Marathousa 2 provides further evidence of megafauna exploitation during the Middle Pleistocene in the Megalopolis Basin and one of the few examples of hippopotamus carcass processing during the Lower Paleolithic in Europe. Therefore, it advances our knowledge of the food acquisition strategies and subsistence behavior of Pleistocene Homo, and highlights the need for further research in the basin, where megafauna is well recorded.
description: PaleoAnthropology, Vol. 2023 No. 1 (2023): (in progress)
Ahead of the Times: Blade and Bladelet Production Associated with Neandertal Remains at the Bau de l’Aubesier (Mediterranean France) Between MIS 7 and MIS 5d
Creators: name: Carmignani, Leonardo
name: Soressi, Marie
Publisher: name: PaleoAnthropology
Year: 2023

description: Middle Paleolithic blade production is documented in north-western Europe as early as 250 ka between the Seine and the Rhine valleys. If Middle Paleolithic blade production is now a well-established fact, it is still unclear whether bladelets – or microlithic blade production – were intentionally produced during the Middle Paleolithic. Evidence suggesting Middle Paleolithic bladelet production is sparse, often debatable, perhaps unrecognized in the old collections and usually dated to MIS 3 and, less frequently, to MIS 4. Here, a detailed chaîne opératoire analysis is applied to more than 100,000 lithic artifacts (including the microlithic elements collected through sieving) excavated in fourteen different layers at the Bau de l’Aubesier rock shelter in south-eastern France. The Bau de l’Aubesier contained several Neandertal and (pre) Neandertal remains, and Electron Spin Resonance (ESR), Uranium-Thorium (U-Th), Thermoluminescence (TL), and biostratigraphy indicate that the oldest layers are at least 200,000 years old, while the top of the sequence is ~110,000 years old. We found blade production in several layers, constituting direct evidence for laminar reduction strategies in the south of Europe from MIS 7 to MIS 5d and as early as 200 ka. Blades show distinct morpho-technical features that result from using both volumetric and non-volumetric reduction strategies. We also document the earliest independent bladelet production to date in a sedimentary context (level 4) radiometrically dated to MIS 5d and containing six Neandertal teeth. Bladelet cores on flakes and maintenance bladelets are found in the MIS 5d level only, and only rare irregular bladelets are found in levels older than MIS 5d—suggesting that recurrent bladelet production was not used at the Bau de l’Aubesier before MIS 5d. Our results support the idea that detailed and exhaustive technological analyses of the entirety of lithic assemblages are required to identify Middle Paleolithic bladelet production, which would otherwise go unnoticed. We suggest that Middle Paleolithic bladelet productions still remain to be discovered, especially in the old collections, and that a better understanding of their variability through time and space is a prerequisite to reconstructing the significance of these technologies some 50 to 200 ka and before the proliferation of Upper Paleolithic blade and bladelet technologies.
description: PaleoAnthropology, Vol. 2023 No. 1 (2023): (in progress)
Agroindustrial by-products from tomato, grape and myrtle given at low dosage to lactating dairy ewes: effects on rumen parameters and microbiota
Creators: name: Buffa, G.
name: Mangia, N. P.
name: Cesarani, A.
name: Licastro, D.
name: Sorbolini, S.
name: Pulina, G.
name: Nudda, A.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: The inclusion of by-products in composite pellet feeds could be a strategy to recycle nutritional components and a commercial opportunity for feeds industries. Aim of this study was to evaluate if the use of small amount of dried by-products containing polyphenols could alter rumen fermentation parameters and microbiota in dairy ewes. Thirty-six ewes (9 animals per group) were fed control diet (CON), and diets supplemented with 100 g/d per animal of tomato pomace (TP), 100 g/d per animal of grape marc (GM), and 75 g/d per animal of exhausted myrtle berries (EMB). Treatment showed significant effects only on pH, whereas sampling time affected almost all rumen fermentation parameters. No differences in the proportion of any phylum were detected in GM group compared to CON group. TP, compared to CON, evidenced higher abundance of Proteobacteria phylum (counts of 4.86; log fold chain of 5.61) which was dominated by Acetobacteraceae family with Acetobacter genus. The supplementation of EMB resulted in higher abundance of Succinivibrionaceae and lower abundance of Veillonellaceae family. Furthermore, in EMB group the Paraprevotellaceae and Prevotellaceae families dominated the phylum of Bacteroidetes. This phylum was significantly different between EMB and CON diet (counts of 57.06; log fold change of 1.10). The estimated production of methane and rumen fermentation parameters were not affected by the diets. The supplementation in small doses of GM, TP and EMB in the diets of sheep did not evidence a clear variation in rumen fermentation parameters nor changes in the general structure of rumen microbiota.HIGHLIGHTSThe agroindustrial by-products did not affect the rumen biochemical parameters.The structure of bacteria community was influenced by EMB diet.GM and TP diets did not increase rumen ammonia. The agroindustrial by-products did not affect the rumen biochemical parameters. The structure of bacteria community was influenced by EMB diet. GM and TP diets did not increase rumen ammonia.
Project AVANT poster
Creators: name: RTDS Group
Publisher: name: Zenodo
Year: 2024

description: The poster provides general information about the content, the objectives and the consortium of AVANT

The poster was created by RTDS Group as Dissemination, Exploitation and Communication partner of H2020 AVANT - Alternatives to Veterinary ANTimicrobials. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 862829.
Non-parametric analysis of the effects of nongenetic factors on milk yield, fat, protein, lactose, dry matter content and somatic cell count in Murciano-Granadina goats
Creators: name: Pizarro, M. G.
name: Landi, V.
name: Navas, F. J.
name: León, J. M.
name: Martínez, A.
name: Fernández, J.
name: Delgado, J. V.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Computational Biology

description: The objective of this work was to evaluate the influence of non-genetic factors on milk yield, its composition (fat, protein, dry matter and lactose) and the count of somatic cells in Murciano-Granadina goat breed, through the application of alternative nonparametric tests to routine parametric tests to explain the variability found in the population with respect the aforementioned traits. 2594 milk yield and composition records belonging to 159 goats from the selection nucleus were analysed. Predictors evaluated were farm, type of birth and parity order, live kids, parturition month, season and year, control number, control type, control month, season and year, days in lactation, days from first control, days from last control to drying, drying month, season and year. All of them presented a significant influence (p < .0001) on all the variables studied with the exception of the number of stillborn kids which did not significantly influence the percentage of each component and the year of drying which seemed not to significantly influence dry matter percentage. Conclusively, nongenetic factors affect milk yield and its compositions in the Murciano-Granadina goat breed. Additionally, the inclusion of the type of milk control and information related to the drying period in models predicting for milk yield and content may provide interesting information, which must be included in genetic evaluations to promote higher and better-quality milk production improving the profitability of autochthonous breeds.HIGHLIGHTSNon-genetic factors may affect milk components more than milk yield.Including factors related to lactation cycle can help identifying critical points.Drying-off period information promotes milk yield and quality.Studying nongenetic factors helps maximising milk predictive model potential.Factor combinations studied explain up to 41.8% of variability of milk yield. Non-genetic factors may affect milk components more than milk yield. Including factors related to lactation cycle can help identifying critical points. Drying-off period information promotes milk yield and quality. Studying nongenetic factors helps maximising milk predictive model potential. Factor combinations studied explain up to 41.8% of variability of milk yield.
Intelligent Human Machine Interface Design for Advanced Product Life Cycle Management Systems
Creators: name: Ahmed, Zeeshan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Designing and implementing an intelligent and user friendly human machine interface for any kind of software or hardware oriented application is always be a challenging task for the designers and developers because it is very difficult to understand the psychology of the user, nature of the work and best suit of the environment. This research paper is basically about to propose an intelligent, flexible and user friendly machine interface for Product Life Cycle Management products or PDM Systems since studies show that usability and human computer interaction issues are a major cause of acceptance problems introducing or using such systems. Going into details of the proposition, we present prototype implementations about theme based on design requirements, designed designs and technologies involved for the development of human machine interface.
description: In International Conference on Frontiers of Information Technology, ACM - FIT09, Session 5: Computational Science/Artificial Intelligence, 16-18 December, 2009