cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exact and Approximate Theoretical Techniques for Quantum Magnetism in Low Dimensions
Creators: name: Pati, Swapan K.
name: Ramasesha, S.
name: Sen, Diptiman
Publisher: name: arXiv
Year: 2001
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Quantum magnetism in low dimensions has been one of the central areas of theoretical research for many decades now. One of the key reasons for the long standing interest in this field has been the existence of simplified models, which serve as paradigms for understanding the role of strong interactions in many-electron systems. Although simple, these models quite often can not be solved exactly. In this review, we discuss a variety of analytical and numerical methods, which treat the system in a systematic and controlled manner. The central method employed in all the studies is the density matrix renormalization group (DMRG) method. This is supported by small scale numerical exact calculations, and by analytical methods using field theoretic techniques. We have considered a number of magnetic systems, from magnetic clusters to extended lattices, and have found some novel quantum ground states and low-energy elementary excitations. In some cases, we have also employed the finite-temperature DMRG method to accurately compute the low-temperature thermodynamic properties such as specific heat and magnetic susceptibility.
description: LaTeX, 81 pages including 29 eps figures
Contributions of climate change, land use change and CO2 to changes in the gross primary productivity of the Tibetan Plateau
Creators: name: LUO, Xin
name: Binghao JIA
name: LAI, Xin
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Computational Biology

description: The ecosystems on the Tibetan Plateau (TP) are highly vulnerable to climate change, rising CO2 concentration, and land-use and land-cover change (LULCC), but their contributions to changes in the gross primary productivity (GPP) of the TP are not clearly understood. In this study, the role of these three factors on the interannual variations (IAVs) and trends of the TP’s GPP were investigated using 12 terrestrial biosphere models. The ensemble simulations showed that climate change can explain most of the changes in the GPP, while the direct effect of LULCC and rising CO2 (mainly fertilization effect) contributed 10% and −14% to the mean GPP values, 37% and −20% to the IAV, and 52% and −24% to the GPP’s trend, respectively. The LULCC showed higher contributions to the significant positive trend in the annual GPP of the TP. However, the results from different model simulations showed that considerable uncertainties were associated with the effects of LULCC on the GPP of the TP.
Substrate-Flexible Two-Stage Fed-Batch Cultivations for the Production of the PHA Copolymer P(HB-co-HHx) With Cupriavidus necator Re2058/pCB113
Creators: name: Santolin, Lara
name: Waldburger, Saskia
name: Neubauer, Peter
name: Riedel, Sebastian L.
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 570 Biowissenschaften; Biologie
subject: Cupriavidus necator
subject: Ralstonia eutropha
subject: PHA
subject: poly(hydroxybutyrate-co-hydroxyhexanoate)
subject: two-stage fed-batch
subject: substrate-flexible
subject: rapeseed oil
subject: high-cell-density cultivation

description: Recent studies of the impact and dimension of plastic pollution have drawn the attention to finding more sustainable alternatives to fossil-based plastics. Microbially produced polyhydroxyalkanoates (PHAs) biopolymers are strong candidates to replace conventional plastic materials, due to their true biodegradability and versatile properties. However, widespread use of these polymers is still hindered by their high cost of production. In the present study, we target high yields of the PHA copolymer poly(hydroxybutyrate-co-hydroxyhexanoate) [P(HB-co-HHx)] using a substrate-flexible two-stage fed-batch approach for the cultivation of the recombinant Cupriavidus necator strain Re2058/pCB113. A more substrate-flexible process allows to cope with constant price fluctuations and discontinuous supply of feedstocks on the market. Utilizing fructose for biomass accumulation and rapeseed oil for polymer production resulted in a final biomass concentration of 124 g L–1 with a polymer content of 86 wt% holding 17 mol% of HHx. Productivities were further optimized by operating the biomass accumulation stage in a “drain and fill” modus where 10% of the culture broth was recycled for semi-continuous biomass accumulation, after transferring 90% to a second bioreactor for PHA production. This strategy succeeded in shortening process times rising productivity yields to ∼1.45 g L–1 h–1.
Computational Aeroacoustic Analysis of Flap Deflection and Camber of an Airfoil
Creators: name: Vishesh Kashyap
Publisher: name: figshare
Year: 2019
Subjects: subject: 90101 Aerodynamics (excl. Hypersonic Aerodynamics)
subject: FOS: Mechanical engineering

description: A number of fields involve the study of noise generated by airfoils. As restrictions on the noise generated by machinessuch as jet engines and turbines become more stringent, there is a need to understand the phenomenon of aeroacoustics. In order to increase the lift of a wing, external flaps and highly cambered main elements are often deployed. These elements can also affect the noise created by the wing. A computational aeroacoustic analysis was carried out using ANSYS Fluent in order to assess the impact of these on the turbulence and noise generated by an airfoil. Airfoils with NACA 0012, NACA 4412 and Eppler 423 as the main element were studied at flap deflections of 0°, 15° and 30°. The SST k-ω turbulence model was used along with a broadband noise-based acoustic model solver. Values of turbulence intensity, surface acoustic power level and X and Y-direction self and shear noise were plotted along the surface of the airfoil, and a direct correlation between turbulence and surface acoustic power was observed. It was also observed that the acoustic power generated by the airfoil showed an increasing trend on the suction side, with increase in both camber and flap deflection. However, this was compensated for by a corresponding decrease on the pressureside. The self and shear noise were also shown to exhibit an increasing trend with camber and flap deflection, with the Y-directional sources dominating at higher flap deflections.
Flexible photoluminescent waveguide amplifiers to improve visible light communication platforms
Creators: name: Bastos, ARN
name: McKenna, B
name: Silvério, T
name: Carlos, LD
name: André, PS
name: Evans, RC
name: Ferreira, RAS
Publisher: name: Institution of Engineering and Technology (IET)
Year: 2020
Subjects: organic-inorganic hybrid materials
photoluminescence
optical communication
light emitting diodes
optical wireless communication
huge growing interest
research spotlight
scientific community
self-sustainable smart houses
Internet of Things
VLC link
free space
VLC performance
enhanced system solution
optical amplifier
organic-inorganic hybrids
blue-emitting conjugated polymer
high quantum yield
planar waveguides
signal amplitude improvement
promising cost-effective solution
optical amplification
flexible photoluminescent waveguide amplifiers
visible light communication platforms
commercial light-emitting diodes
energy-efficient solution
noise figure 2
5 dB

description: Commercial light‐emitting diodes are a low‐cost and energy‐efficient solution for the implementation of optical wireless communication, known as visible light communication (VLC). This technology has a huge growing interest, being recently a research spotlight in the scientific community, especially due to the increasing popularity and rapid development of self‐sustainable smart houses and the Internet of Things. As the VLC link is free space, big challenges arise in its implementation. To improve the VLC performance, this work proposes an enhanced system solution integrating an optical amplifier. In this context, organic–inorganic hybrids incorporating a blue‐emitting conjugated polymer with high quantum yield (>50%) were synthesised and processed as planar waveguides. The waveguides were tested in a testbed scenario, showing a signal amplitude improvement of 2.5 dB, establishing the proposed approach as a promising cost‐effective solution for optical amplification in VLCs.
Eudonia pallida
Creators: name: Yepishin, Viktor
name: Khalaim, Yevhenii
name: Budashkin, Yuriy
name: Zhakov, Oleksandr
name: Mushynskyi, Vadym
name: Novytskyi, Sergiy
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Crambidae
Eudonia
Eudonia pallida

description: Eudonia pallida (Curtis, 1827)
 Material examined: 1♂, Chernihiv reg., Chernihiv distr., NE vic. Zamhlai, 51°49’13”N, 31°10’29”E, at light, 26–27.VI.2019 (V. Yepishin), genitalia slide: V. Yepishin prep. no. 329.20 ♂ (VYe). 1 ex., Kherson reg., Skadovsk distr., vic. Burkuty, 7.VI.2020 (V. Mushynskyi) (VM).
 Distribution: Europe, Turkey, Armenia, Iran, C Asia (Leraut 2012; Koçak & Kemal 2018); Russia: Kaliningrad region, European part, Middle Volga, Volgo-don and W Caucasus regions, Buryatia, Zabaykalsky krai (Sinev & Streltsov 2019); Ukraine: Kyiv (Sovinskij 1935) and Ternopil (Toll 1939) regions, first records for Chernihiv and Kherson regions.
description: Published as part of Yepishin, Viktor, Khalaim, Yevhenii, Budashkin, Yuriy, Zhakov, Oleksandr, Mushynskyi, Vadym & Novytskyi, Sergiy, 2021, New records of pyraloid moths (Lepidoptera: Pyraloidea) from different regions of Ukraine, pp. 366-388 in Zootaxa 5023 (3) on page 378, DOI: 10.11646/zootaxa.5023.3.3, http://zenodo.org/record/5226112
Influence of Chemical Heterogeneity and Third Body on Adhesive Strength: Experiment and Simulation
Creators: name: Lyashenko, Iakov A.
name: Li, Qiang
name: Popov, Valentin L.
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: surface energy
subject: adhesive contact
subject: hysteresis
subject: third body
subject: chemical heterogeneity

description: We investigate experimentally and numerically the influence of chemical heterogeneity and of third-body particles on adhesive contact. Chemical heterogeneity is generated by chemical treatment of the contacting bodies changing locally the surface energy. For studying the influence of the third body, two types of particles are used: sand particles with various geometrical shapes and sizes, and steel spheres of equal radius. Dependencies of the normal force on the indentation depth at both indenting and pull-off as well as the evolution of the contact configuration are investigated. Corresponding numerical simulations are carried out using the boundary element method (BEM).
Agricultural subsidies in the United States and their effect on two annual Chilean crops: corn and wheat
Creators: name: Osorio, José Díaz
name: Rojas, Roberto Jara
name: Osorio, José Díaz
name: Rojas, Roberto Jara
Publisher: name: Unknown
Year: 2006
Subjects: subject: Agribusiness
subject: subsidies
subject: Protectionism
subject: Traditional Crops
subject: Free Trade Agreement
subject: competitiveness

description: The development strategies for Chile have been oriented toward a greater commercial openness. Chile and the United States signed a Free Trade Agreement (FTA) that has triggered controversies between producers directed to the internal market due to the production and export subsidies that this country carries out. This study analyzed the effect of subsidies granted by the United States to wheat (Tritricum aestivum) and corn (Zea mays) growers (Farm Bill 2002). For the study, Technical Standard sheet were drawn up, from which were determined the direct production costs and the gross margins. The variables used (market prices, subsidies, freight costs and tariffs) and determining the average variable costs allowed us to do a sensitivity analysis, thus establishing the minimum level of produc-tion that national farmers must achieve in order to maintain competitive-ness while a free trade is in force. The signing of a trade agreement could provoke the eventual withdrawal of many Chilean producers from the busi-ness arena while at the same time, favoring consumers with lower prices for the goods derived from these grains.
Characterization of exact one-query quantum algorithms
Creators: name: Chen, Weijiang
name: Ye, Zekun
name: Li, Lvzhou
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The quantum query models is one of the most important models in quantum computing. Several well-known quantum algorithms are captured by this model, including the Deutsch-Jozsa algorithm, the Simon algorithm, the Grover algorithm and others. In this paper, we characterize the computational power of exact one-query quantum algorithms. It is proved that a total Boolean function $f:\{0,1\}^n \rightarrow \{0,1\}$ can be exactly computed by a one-query quantum algorithm if and only if $f(x)=x_{i_1}$ or ${x_{i_1} \oplus x_{i_2} }$ (up to isomorphism). Note that unlike most work in the literature based on the polynomial method, our proof does not resort to any knowledge about the polynomial degree of $f$.
Rest-Frame Ultraviolet Spectra of z~3 Lyman Break Galaxies
Creators: name: Shapley, A. E.
name: Steidel, C. C.
name: Pettini, M.
name: Adelberger, K. L.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a systematic study of the rest-frame UV spectroscopic properties of Lyman Break Galaxies (LBGs). The database of almost 1000 LBG spectra proves useful for constructing high S/N composite spectra. The composite spectrum of the entire sample reveals a wealth of features attributable to hot stars, HII regions, dust, and outflowing neutral and ionized gas. By grouping the database according to galaxy parameters such as Lyman-alpha equivalent width, UV spectral slope, and interstellar kinematics, we isolate some of the major trends in LBG spectra which are least compromised by selection effects. We find that LBGs with stronger Lyman-alpha emission have bluer UV continua, weaker low-ionization interstellar absorption lines, smaller kinematic offsets between Lyman-alpha and the interstellar absorption lines, and lower star-formation rates. There is a decoupling between the dependence of low- and high-ionization outflow features on other spectral properties. Most of the above trends can be explained in terms of the properties of the large-scale outflows seen in LBGs. According to this scenario, the appearance of LBG spectra is determined by a combination of the covering fraction of outflowing neutral gas which contains dust, and the range of velocities over which this gas is absorbing. Higher sensitivity and spectral resolution observations are still required for a full understanding of the covering fraction and velocity dispersion of the outflowing neutral gas in LBGs, and its relationship to the escape fraction of Lyman continuum radiation in galaxies at z~3.
description: 28 pages including 17 figures. Accepted for publication in ApJ
Additional file 7 of Modeling transcriptional regulation using gene regulatory networks based on multi-omics data sources
Creators: name: Patel, Neel
name: Bush, William S.
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 7: Supplementary Table S6. Results from fitting the SKAT models.
Implications of Farm–Non-farm Population Shifts for Household Poverty Changes in Cameroon
Creators: name: Epo, Boniface Ngah
name: Baye, Francis Menjo
name: Epo, Boniface Ngah
name: Baye, Francis Menjo
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agribusiness
subject: Food Security and Poverty
subject: International Development
subject: Agriculture
subject: Poverty
subject: Population shifts and Cameroon.

description: This paper studies the implications of farm–non-farm population shifts for household poverty outcomes in Cameroon. It uses total real expenditure per adult equivalent as the wellbeing indicator, as well as the 1996, 2001 and 2007 Cameroon household consumption surveys carried out by the government’s statistics office. Results indicate that both the within-sector and between-sector effects are important in accounting for the fall in poverty, with the former largely accounting for the decline in the incidence, depth and severity of poverty. The inter-sector effects portray the role played by farm–non-farm population shifts in alleviating poverty in the farm sector, while increasing it in the non-farm sector. This result also suggests the potential role of diversification-cum-migration in enhancing rural livelihood opportunities. The size of the within-farm effects has implications for public policy that encourages agricultural modernization as a sustainable means to engineer agricultural-based industrialization and which addresses the recurrent hikes in urban food prices.
Destruction of the phase coherence by the magnetic field in the fluctuation region of thin superconducting film
Creators: name: Nikulov, A. V.
name: Dubonos, S. V.
name: Koval, Y. I.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: It was shown as long ago as 1998 cond-mat/9811051 that the vortex lattice melting theories are science fiction because the Abrikosov state is not the vortex lattice with crystalline long-range order. Nevertheless this false conception is used up to now in many works including the lecture notes cond-mat/0111052 providing a pedagogical introduction. This false conception has resulted from visual but incorrect ideas. In spite of outward appearances only long-range order - long-range phase coherence exists in the Abrikosov state. The phase transition interpreted erroneously as the vortex lattice melting is in reality a disappearance of long-range phase coherence. The investigation of the nonlocal resistivity made in this work is experimental evidence that a state without phase coherence, differed qualitatively from mythical vortex liquid, is observed above this transition.
description: 4 pages, 3 figures
Determinants of food-poverty states and the demand for dietary diversity in Nigeria
Creators: name: Ogundari, Kolawole
name: Ogundari, Kolawole
Publisher: name: Unknown
Year: 2013
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: dietary diversity
subject: food security
subject: food-poverty
subject: food expenditure
subject: Nigeria

description: The study employed multinomial logit and fractional regression models to investigate determinants of food-poverty FP states and the demand for dietary diversity, respectively using 2003/2004 Nigerian Living Standard Survey (NLSS) data. The FP states is derive by combining two food security indicators defined as food expenditure (FOOD_exp) and dietary diversity score (DDS), which yielded four possible scenarios viz. completely food secure, food insecure based on FOOD_exp only, food insecure based on DDS only, and completely food insecure households in the study. The determinants of the household FP states show that odds ratio of households being in state of food insecure relative to completely food secure increased significantly with household size, among households headed by farmers, households that own produced and purchase only food consumed, and households in the rural areas but decrease significantly as income level increases. Also, the determinants of household dietary diversity shows that household income, household size, household with members <40 years old, households headed by farmers and households in rural areas, increased significantly dietary diversity consumed in the study. In contrast, more educated household head and household that only home produced their food are likely to demand for less dietary diversity. The implication of these findings is that households in the different states of food-poverty problem are likely to be affected by different socio-economic characteristics, as demand for dietary diversity also differ across household socio-economic variables in Nigeria. Based on this, the study suggests that the present approach could be useful in targeting different types of food insecurity problem in the developing economies and Nigeria as a whole.
Black hole production in TeV-scale gravity, and the future of high energy physics
Creators: name: Giddings, Steven B.
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: If the Planck scale is near a TeV, black hole production should be possible at colliders, as well as by cosmic rays. I begin with a review of the two approaches to TeV-scale gravity, large extra dimensions and warped compactification, presented in a unified framework. Then properties of such black holes and estimates of their production rates are given, and consequences for the future of high-energy experimental physics are discussed.
description: To appear in the proceedings of "Snowmass 2001;" 9 pages, revtex4. v2: minor corrections/changes to wording v3: changes to cosmic ray neutrino event rates
Generalized collision-free velocity model for pedestrian dynamics
Creators: name: Xu, Qiancheng
name: Chraibi, Mohcine
name: Tordeux, Antoine
name: Zhang, Jun
Publisher: name: arXiv
Year: 2019
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The collision-free velocity model is a microscopic pedestrian model, which despite its simplicity, reproduces fairly well several self-organization phenomena in pedestrian dynamics. The model consists of two components: a direction sub-model that combines individual desired moving direction and neighbor's influence to imitate the process of navigating in a two-dimensional space, and an intrinsically collision-free speed sub-model which controls the speed of the agents with respect to the distance to their neighbors. In this paper we generalize the collision-free velocity model by introducing the influence of walls and extending the distance calculations to velocity-based ellipses. Besides, we introduce enhancements to the direction sub-module that smooth the direction changes of pedestrians in the simulation; a shortcoming that was not visible in the original model due to the symmetry of the circular shapes. Moreover, the introduced improvements mitigate backward movements, leading to a more realistic distribution of pedestrians especially in bottleneck scenarios. We study by simulation the effects of the pedestrian's shape by comparing the fundamental diagram in narrow and wide corridors. Furthermore, we validate our generalized approach by investigating the flow through bottlenecks with varying exit's widths.
Unified SU(4) theory for the $R_{D^{(*)}}$ and $R_{K^{(*)}}$ anomalies
Creators: name: Balaji, Shyam
name: Schmidt, Michael A.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a chiral Pati-Salam theory based on the gauge group $SU(4)_C\times SU(2)_L\times SU(2)_R$. The left-handed quarks and leptons are unified into a fundamental representation of $SU(4)_C$, while right-handed quarks and leptons have a separate treatment. The deviations measured in the rare semi-leptonic decays $B\to D^{(*)} τ\barν$ are explained by a scalar leptoquark which couples to right-handed fields and is contained in the $SU(4)_C\times SU(2)_R$ breaking scalar multiplet. The measured deviation of lepton flavor universality in the rare decays $\bar B\to \bar K^{(*)}\ell^+\ell^-$, $\ell=μ,e$ is explained via the $SU(4)_C$ leptoquark gauge boson. The model predicts a new sub-GeV scale sterile neutrino which participates in the anomaly and can be searched for in upcoming neutrino experiments. The theory satisfies the current most sensitive experimental constraints and its allowable parameter regions will be probed as more precise measurements from the LHCb and Belle II experiments become available.
description: 21 pages, 4 figures; v2: minor changes, matches published version
Aporodes floralis
Creators: name: Yepishin, Viktor
name: Khalaim, Yevhenii
name: Budashkin, Yuriy
name: Zhakov, Oleksandr
name: Mushynskyi, Vadym
name: Novytskyi, Sergiy
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Crambidae
Aporodes
Aporodes floralis

description: Aporodes floralis (Hübner, 1809)
 Material examined: 1♂, Kyiv reg., Bucha distr., Muzychi, at light, 20. V.2007 (M. Nesterov), genitalia slide: V. Yepishin prep. no. 154.19 ♂. 1♂, 1♀, Kyiv reg., Fastiv, at light, 4–5.IX.2015, 25–26.VI.2017 (V. Yepishin). 1♂, Odesa reg., Bilhorod-Dnistrovskyi distr., S vic. of Dyvisiya vill., 45°55’44”N, 29°58’48”E, 12. VI.2020 (Ye. Khalaim); 1♂, Odesa reg., Bilhorod-Dnistrovskyi distr., 6 km E of Prymorske vill., 45°40’30”N, 29°52’11”E, 6.VII.2020 (Ye. Khalaim) (all VYe). 1♂, Odesa reg., Berezivka distr., NW vic. Severynivka, hills above the village, at light, 23.VII.2017 (S. Trotsenko). 1♀, Odesa reg., Berezivka distr., 2.5 km N Zavodivka, at light, 15. VI.2018 (S. Trotsenko) (all ST).
 Distribution: W, C and S Europe, N Africa (Leraut 2012); Turkey (Koçak & Kemal 2018); Russia: Caucasus, Volgo-don, Middle and Lower Volga regions, S Urals (Sinev & Streltsov 2019); Ukraine: Kharkiv (Karolinskiy et al. 2019), Mykolaiv (Obraztsov 1935b), Kherson (Obraztsov 1935b, 1936b, Zaporizhzhia (Bidzilya et al. 2001), Donetsk (Alberti & Soffner 1962; Pak & Yaroshenko 2001b) and Luhansk (Geryak et al. 2013) regions and Crimea (Budashkin 2004), first records for Kyiv and Odesa regions.
description: Published as part of Yepishin, Viktor, Khalaim, Yevhenii, Budashkin, Yuriy, Zhakov, Oleksandr, Mushynskyi, Vadym & Novytskyi, Sergiy, 2021, New records of pyraloid moths (Lepidoptera: Pyraloidea) from different regions of Ukraine, pp. 366-388 in Zootaxa 5023 (3) on page 378, DOI: 10.11646/zootaxa.5023.3.3, http://zenodo.org/record/5226112
A cross-region study: climate change adaptation in Malawi's agro-based systems
Creators: name: Assa, Maganga Mulagha
name: Gebremariam, Gebrelibanos G.
name: Mapemba, Lawrence D.
name: Assa, Maganga Mulagha
name: Gebremariam, Gebrelibanos G.
name: Mapemba, Lawrence D.
Publisher: name: Unknown
Year: 2013
Subjects: subject: Agricultural and Food Policy
subject: Farm Management
subject: Research Methods/ Statistical Methods
subject: Climate change
subject: adaptation
subject: multinomial logit

description: Agriculture in Malawi is vulnerable to the impacts of changing climate. Adaptation is identified as one of the options to abate the negative impacts of the changing climate. This study analyzed the factors influencing different climate change adaptation choices by smallholder farmers in Malawi. We sampled 900 farmers from all three regions of Malawi, using the multistage sampling procedure, study piloted in 2012. We analyzed smallholder farmers’ climate change adaptation choices with Multinomial logit regression. Factors that enhance or hinder choice of climate adaptation options include age, gender, household size, land ownership, credit access, climate change training and extension visit. Policy thrust should focus on linking farmers to credit institutions, advocating for labour saving farm technologies and intensification of climate change trainings among smallholder farmers.
Path-integral representation for a stochastic sandpile
Creators: name: Dickman, Ronald
name: Vidigal, Ronaldo
Publisher: name: arXiv
Year: 2002
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We introduce an operator description for a stochastic sandpile model with a conserved particle density, and develop a path-integral representation for its evolution. The resulting (exact) expression for the effective action highlights certain interesting features of the model, for example, that it is nominally massless, and that the dynamics is via cooperative diffusion. Using the path-integral formalism, we construct a diagrammatic perturbation theory, yielding a series expansion for the activity density in powers of the time.
description: 22 pages, 6 figures
Radio/X-ray Correlation in the Mini-Outburts of Black Hole X-ray Transient GRS 1739--278
Creators: name: Xie, Fu-Guo
name: Yan, Zhen
name: Wu, Zhongzu
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present quasi-simultaneous radio and X-ray observations of the black hole X-ray binary GRS 1739--278 of its 2015-2016 mini-outbursts, i.e. between 2015 June 10 and 2016 October 31, with the X-ray-to-radio time interval being less than one day. The monitor champaign was run by \swift\, in the X-rays and by JVLA in the radio (at both 5 GHz and 8 GHz). We find the brightest radio emission is actually achieved during the soft sate, where radio spectrum is unexpectedly flat with a spectral index $α\approx -0.2$ (flux $F_ν\propto ν^α$). For the radio emission in hard state, we also find a large diversity in the spectral index, i.e. a majority of radio spectra are optically thick with $-0.5 < α< 0.5$, while a few are optically thin with $α< -1$. We also investigate the correlation between the luminosities in radio (monochromatic at 5 GHz, $L_R$) and 1-10 keV X-rays ($L_X$) during the hard state. We find this source does not follow the standard correlation whose $p\approx 0.6$ (in the form of $L_R\propto L_X^p$), but instead belongs to the "outlier" category that may follow a hybrid correlation. For more than orders of magnitude variation in the X-ray luminosity this source exhibits a flat correlation with $p\approx 0.16$. Both the slope and the corresponding luminosity range agree well with those in H1743--322, the prototype of the hybrid correlation.
description: 11 pages, 5 figures and 1 table. ApJ accepted
Getting Bored of Cyberwar: Exploring the Role of Low-level Cybercrime Actors in the Russia-Ukraine Conflict
Creators: name: Vu, Anh V
name: Thomas, Daniel
name: Collier, Benjamin
name: Hutchings, Alice
name: Clayton, Richard
name: Anderson, Ross
Publisher: name: Apollo - University of Cambridge Repository
Year: 2024

description: There has been substantial commentary on the role of cyberattacks carried out by low-level cybercrime actors in the Russia-Ukraine conflict. We analyse 358k website defacement attacks, 1.7M UDP amplification DDoS attacks, 1764 posts made by 372 users on Hack Forums mentioning the two countries, and 441 Telegram announcements (with 58k replies) of a volunteer hacking group for two months before and four months after the invasion. We find the conflict briefly but notably caught the attention of low-level cybercrime actors, with significant increases in online discussion and both types of attacks targeting Russia and Ukraine. However, there was little evidence of high-profile actions; the role of these players in the ongoing hybrid warfare is minor, and they should be separated from persistent and motivated 'hacktivists' in state-sponsored operations. Their involvement in the conflict appears to have been short-lived and fleeting, with a clear loss of interest in discussing the situation and carrying out both website defacement and DDoS attacks against either Russia or Ukraine after just a few weeks.
Metagenomic analysis of the microbial community structure in protected wetlands in the Maritza River Basin
Creators: name: Iliev, Ivan
name: Marhova, Mariana
name: Kostadinova, Sonya
name: Gochev, Velizar
name: Tsankova, Marinela
name: Ivanova, Angelina
name: Yahubyan, Galina
name: Baev, Vesselin
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Microbial communities drive the biogeochemical cycles in wetlands and provide a number of ecosystem services. They underpin soil function, and are easily impacted by anthropogenic pressure. This study examined the bacterial microbiome in the natural wetland of Zlato Pole and the protected, periodically flooded rice paddies in the Maritsa River Basin using a metagenomic approach, based on high-throughput sequencing. Alpha-diversity analysis showed a significant variation between the three study sites for Chao1 and ACE (abundance based coverage estimator) richness estimators. A positive correlation was established with pH, with highest values detected for the rice paddies and the lowest, for the Zlato Pole sediments. The obtained sequences were assigned into 37 known bacterial phyla with over 97% bacterial sequences classified within only nine of them. The bacterial communities in rice paddies sediments were more evenly distributed, whereas the Zlato Pole sediment was the most biased. The consortiums in the rice paddies were dominated by Proteobacteria, followed by Actinobacteria and Acidobacteria. The bacterial assemblages in those sites could not be distinguished by analysis of similarity. The Zlato Pole sediment community held an isolated position, where Acidobacteria was replaced by Firmicutes and Bacteroidetes and the microbiome showed an extremely high abundance of Gammaproteobacteria and Bacilli. The dominance of Gammaproteobacteria and the presence of Deinococcus-Thermus phylum, along lower nutrient concentration and the absence of correlation with the environmental parameters, is evidence of constant anthropogenic pressure around the area. The obtained results could be applied in the plans for sustainable management of the protected wetlands.
Atomic-Scale Investigation on the Ultra-large Bending Behaviours of Layered Sodium Titanate Nanowires
Creators: name: Liu, Qiong
name: Zhan, Haifei
name: Zhu, Huaiyong
name: Sun, Ziqi
name: Bell, John
name: Bo, Arixin
name: Gu, Yuantong
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Study on mechanical properties of one-dimensional layered titanate nanomaterials is crucial since they demonstrate important applications in various fields. Here, we conducted ex situ and in situ atomic-scale investigation on bending properties of a kind of ceramic layered titanate (Na2Ti2O4(OH)2) nanowires in a transmission electron microscopy. The nanowires showed flexibility along <100> direction and could obtain a maximum bending strain of nearly 37%. By analysing the defect behaviours, the unique bending properties of this ceramic material was found to correlate with a novel arrangement of dislocations, an accessible nucleation and movement along the axial direction resulting from the weak electrostatic interaction between the TiO6 layers and the low b/a ratio. These results provide pioneering and key understanding on bending behaviours of layered titanate nanowire families and potentially other one-dimensional nanomaterials with layered crystalline structures.
description: 9 pages, 5 figures
Tegostoma comparalis
Creators: name: Yepishin, Viktor
name: Khalaim, Yevhenii
name: Budashkin, Yuriy
name: Zhakov, Oleksandr
name: Mushynskyi, Vadym
name: Novytskyi, Sergiy
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Crambidae
Tegostoma
Tegostoma comparalis

description: Tegostoma comparalis (Hübner, 1796)
 Material examined: 1 ex., Zaporizhzhia reg., Melitopol distr., Stepanivska spit, 10–12.IX.2019 (Yu. Geryak) (VM).
 Distribution: S Europe, NW Africa, Turkey, Palestine, Syria, Turkmenistan, Pakistan, India (Slamka 2006; Koçak & Kemal 2018); Russia: Lower Volga and Caucasus regions (Sinev & Streltsov 2019); Ukraine: Mykolaiv (Obraztsov 1935b), Luhansk (Bidzilya et al. 2014) regions and Crimea (Martin 1986) first record for Zaporizhzhia region.
description: Published as part of Yepishin, Viktor, Khalaim, Yevhenii, Budashkin, Yuriy, Zhakov, Oleksandr, Mushynskyi, Vadym & Novytskyi, Sergiy, 2021, New records of pyraloid moths (Lepidoptera: Pyraloidea) from different regions of Ukraine, pp. 366-388 in Zootaxa 5023 (3) on page 378, DOI: 10.11646/zootaxa.5023.3.3, http://zenodo.org/record/5226112
Decay rate and renormalized frequency shift of a quantum wire Wannier exciton in a planar microcavity
Creators: name: Chen, Yueh-Nan
name: Chuu, Der-San
name: Brandes, T.
name: Kramer, B.
Publisher: name: arXiv
Year: 2001
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The superradiant decay rate and frequency shift of a Wannier exciton in a one-dimensional quantum wire are studied. It is shown that the dark mode exciton can be examined experimentally when the quantum wire is embedded in a planar microcavity. It is also found that the decay rate is greatly enhanced as the cavity length $L_{c}$ is equal to the multiple wavelength of the emitted photon. Similar to its decay rate counterpart, the frequency shift also shows discontinuities at resonant modes.
description: 12 pages, 2 figures. To appear in P. R. B. September 2001
D2.7 Tutorial for air quality projects in high schools
Creators: name: Grossberndt, Sonja
name: Castell, Nuria
name: Gonzalez, Esteban
name: Passani, Antonella
Publisher: name: Zenodo
Year: 2020
Subjects: Citizen science in high schools
air quality project
Arduino based sensors
tutorial

description: This deliverable serves as a handbook for air quality projects in high schools. It contains information about the ACTION air quality pilot in high schools, tips and lessons learned as well as material that has been used and created within the high school projects.
Structural and electronic properties of the pure and stable elemental 3D topological Dirac semimetal $α$-Sn
Creators: name: Madarevic, Ivan
name: Thupakula, Umamahesh
name: Lippertz, Gertjan
name: Claessens, Niels
name: Lin, Pin-Cheng
name: Bana, Harsh
name: Di Santo, Giovanni
name: Gonzalez, Sara
name: Petaccia, Luca
name: Nair, Maya Narayanan
name: Pereira, Lino M. C.
name: Van Haesendonck, Chris
name: Van Bael, Margriet
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In-plane compressively strained $α$-Sn films have been theoretically predicted and experimentally proven to possess non-trivial electronic states of a 3D topological Dirac semimetal. The robustness of these states typically strongly depends on purity, homogeneity and stability of the grown material itself. By developing a reliable fabrication process, we were able to grow pure strained $α$-Sn films on InSb(100), without heating of the substrate during growth, nor using any dopants. The $α$-Sn films were grown by molecular beam epitaxy, followed by experimental verification of the achieved chemical purity and structural properties of the film's surface. Local insight into the surface morphology was provided by scanning tunneling microscopy. We detected the existence of compressive strain using Mössbauer spectroscopy and we observed a remarkable robustness of the grown samples against ambient conditions. The topological character of the samples was confirmed by angle-resolved photoemission spectroscopy, revealing the Dirac cone of the topological surface state. Scanning tunneling spectroscopy, moreover, allowed obtaining an improved insight into the electronic structure of the 3D topological Dirac semimetal $α$-Sn above the Fermi level.
description: APM19-AR-01221R
title: 01_1588
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
High-precision numerical solution of the Fermi polaron problem and large-order behavior of its diagrammatic series
Creators: name: Van Houcke, K.
name: Werner, F.
name: Rossi, R.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We introduce a simple determinant diagrammatic Monte Carlo algorithm to compute the ground-state properties of a particle interacting with a Fermi sea through a zero-range interaction. The fermionic sign does not cause any fundamental problem when going to high diagram orders, and we reach order $N=30$. The data reveal that the diagrammatic series diverges exponentially as $(-1/R)^{N}$ with a radius of convergence $R<1$. Furthermore, on the polaron side of the polaron-dimeron transition, the value of $R$ is determined by a special class of three-body diagrams, corresponding to repeated scattering of the impurity between two particles of the Fermi sea. A power-counting argument explains why finite $R$ is possible for zero-range interactions in three dimensions. Resumming the divergent series through a conformal mapping yields the polaron energy with record accuracy.
The Redshift Evolution of the 2-8 keV X-ray Luminosity Function
Creators: name: Cowie, L. L.
name: Barger, A. J.
name: Bautz, M. W.
name: Brandt, W. N.
name: Garmire, G. P.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The high angular resolution and sensitivity of the Chandra X-ray Observatory has yielded large numbers of faint X-ray sources with measured redshifts in the soft (0.5-2 keV) and hard (2-8 keV) energy bands. Many of these sources show few obvious optical signatures of active galactic nuclei (AGN). We use Chandra observations of the Hubble Deep Field North region, A370, and the Hawaii Survey Fields SSA13 and SSA22, together with the ROSAT Ultra Deep Survey soft sample and the ASCA Large Sky Survey hard sample, to construct rest-frame 2-8 keV luminosity functions versus redshift for all the X-ray sources, regardless of their optical AGN characteristics. At z=0.1-1 most of the 2-8 keV light density arises in sources with luminosities in the 10^42 erg/s to 10^44 erg/s range. We show that the number density of sources in this luminosity range is rising, or is at least constant, with decreasing redshift. Broad-line AGN are the dominant population at higher luminosities, and these sources show the well-known rapid positive evolution with increasing redshift to z~3. We argue that the dominant supermassive black hole formation has occurred at recent times in objects with low accretion mass flow rates rather than at earlier times in more X-ray luminous objects with high accretion mass flow rates.
description: 5 pages, accepted by The Astrophysical Journal Letters
Hubble-induced radiative corrections and Affleck-Dine Baryogenesis
Creators: name: Allahverdi, Rouzbeh
name: Drees, Manuel
name: Mazumdar, Anupam
Publisher: name: arXiv
Year: 2001
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine the viability of the Affleck-Dine mechanism for baryogenesis under radiatively induced running of soft breaking $({\rm mass})^2$ of the flat directions stemming from non-zero energy density of the inflaton during inflation. A major difference from analogous phenomenological studies is that the horizon radius provides a natural infrared cut-off to the quantum corrections in this case. We identify different scenarios which may arise and point out that the $H_{u}L$ flat direction remains the most promising flat direction, since it is largely independent of uncertainties about high scale physics and details of the inflationary model.
description: 6 revtex pages, 1 Table
Dolicharthria punctalis
Creators: name: Yepishin, Viktor
name: Khalaim, Yevhenii
name: Budashkin, Yuriy
name: Zhakov, Oleksandr
name: Mushynskyi, Vadym
name: Novytskyi, Sergiy
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Crambidae
Dolicharthria
Dolicharthria punctalis

description: Dolicharthria punctalis ([Denis & Schiffermüller], 1775)
 Material examined: 4♂, Khmelnytskyi reg., Kamianets-Podilskyi distr., SW vic. Subich, 48°35’24”N 26°49’34”E, 17–19.VII.2021 (V. Yepishin) (VYe). 1 ex., Odesa reg., Biliaivka distr., 3.5 km NW Gradenytsi, 46°37’21.6”N 29°58’14.9”E, 16.X.2018 (S. Novytskyi) (SN). Observations, Odesa reg., Biliaivka distr., vic. Gradenytsi, 13.VI.2009, 16.VI.2012, 25.V.2013, 7. VI, 12.VII, 10.VIII.2014, 30.V.2016, 19.X.2017 (S. Novytskyi). Observations, Odesa reg., Biliaivka distr., 4 km E Gradenytsi, 15.VI.2016 (S. Novytskyi). Observations, Odesa reg., Biliaivka distr., vic. Biliaivka, 17.IX.2016 (S. Novytskyi). 1♀, Odesa reg., Bilhorod-Dnistrovskyi distr., S vic. of Dyviziya vill., 45°55’44”N, 29°58’48”E, 12. VI.2020 (Ye. Khalaim) (VYe). 1♂, Mykolaiv reg., Pervomaisk distr., 2 km SSE Myhiia, hills above Pivdennyi Buh riv., at light, 14. VI.2020 (S. Trotsenko) (ST).
 Distribution: Europe, N Africa, C Asia (Slamka 2013); Turkey (Koçak & Kemal 2018); Russia: Volgo-Don, W and E Caucasus regions (Sinev & Streltsov 2019); Ukraine: Kharkiv (Karolinskiy et al. 2017, 2018), Zaporizhzhia (Bidzilya et al. 2001), Donetsk (Pak & Yaroshenko 2001b), Luhansk (Pak 1998b; Pak & Yaroshenko 2001b; Geryak et al. 2013) regions and Crimea (Budashkin 1992, 2004), first records for Khmelnytskyi, Odesa and Mykolaiv regions.
 Biology. In Odesa region the species was registered in Dnistrovski plavni (reed bed): vicinity of Kuchurhan, Lymanske, Gradenytsi, Troitske, Yasky and Biliaivka. Imagoes were observed from late May to early August and from September to October, bivoltine.
description: Published as part of Yepishin, Viktor, Khalaim, Yevhenii, Budashkin, Yuriy, Zhakov, Oleksandr, Mushynskyi, Vadym & Novytskyi, Sergiy, 2021, New records of pyraloid moths (Lepidoptera: Pyraloidea) from different regions of Ukraine, pp. 366-388 in Zootaxa 5023 (3) on page 379, DOI: 10.11646/zootaxa.5023.3.3, http://zenodo.org/record/5226112