cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Pareumenes (Nortonia) laevis
Creators: name: Selis, Marco
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Vespidae
Pareumenes
Pareumenes laevis

description: Pareumenes (Nortonia) laevis (von Schulthess, 1903)
(Fig. 5)
Nortonia laevis von Schulthess, 1903: 363, ♂
— “ Insel St. Thomé ” (ETHZ).
Afrorhynchium dathei Gusenleitner, 2020: 221, figs 1–6, ♀
— “ RSA, Kalahari, Augrabies, 630 m, 28°30’33”S 19°53’17”E ” (OLML). Syn. nov.
Diagnosis. Placed in the subgenus Nortonia due to the propodeal valvula not markedly exceeding the apex of the propodeum and the bell-shaped, short and basally angled T1, it is recognized from the other species of the subgenus by the mostly impunctate and velvety body, the elongate clypeus with apical margin wider than interantennal space, the vertex and gena not markedly convex, the absence of the pronotal carina, the weakly sinuate lateral carina of propodeum, the evenly convex S2 and the black and dark red pattern.
Material examined. NAMIBIA: Khomas, Gmundner Lodge, 15.III.2003, leg. M. & J. Schwarz, 1♀ (OLML); SÃO TOMÉ: Guinée, San Thomè, 3♂ 1♀ (MSNVE, MSVI).
Distribution. Namibia, São Tomé, South Africa (von Schulthess 1903; Giordani Soika 1938, 1987; Gusenleitner 2012) (Fig. 13G).
Notes. The female specimen in MSNVE was examined by Giordani Soika (1987: 204) to describe the female sex of this taxon and is labeled as allotype, but in fact it does not belong to the type series.
Comparison of pictures of the holotype of Afrorhynchium dathei with specimens of Pareumenes laevis, including the mentioned “ allotype ”, did not allow finding any character useful to recognize them as two distinct species. The holotype of Afrorhynchium dathei from South Africa differs from the specimens from São Tomé in having reduced red markings, small yellowish spots at sides of T2 and coarser and denser punctures on mesepisternum. These characters are here regarded as simple intraspecific variability, probably related to the different climatic conditions, leading to the synonymy of Afrorhynchium dathei under Pareumenes laevis. This is further supported by the examination of a female specimen from Namibia, showing an even darker pattern than the holotype of A. dathei but having the sculpture of the mesepisternum intermediate between P. laevis from São Tomé and A. dathei.
description: Published as part of Selis, Marco, 2025, Revision of the Afrotropical species of Pareumenes de Saussure (Hymenoptera, Vespidae, Eumeninae), pp. 205-227 in Zootaxa 5584 (2) on page 213, DOI: 10.11646/zootaxa.5584.2.3, http://zenodo.org/record/14830818
On Gas-Drag Induced Rapid Migration of Solids in a Non-Uniform Solar Nebula
Creators: name: Haghighipour, Nader
name: Boss, Alan P.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the motions of small solids, ranging from micron-sized dust grains to meter-sized objects, in the vicinity of local pressure enhancements of a gaseous nebula. Integrating numerically, we show that as a result of the combined effect of gas drag and pressure gradients, solids tend to accumulate at the locations where the pressure of the gas maximizes. The rate of migration of solids varies with their sizes and densities and also with the physical properties of the gas. The results of our numerical simulations indicate that such migrations are most rapid for meter-sized objects. The applicability of the results to the enhancement of the collision and coagulation of solids and also to the growth-rate of planetesimals is discussed.
description: 27 pages, 15 figures, figures 1, 5, 11 and 15 in gif format (click on postscript), submitted for publication
AGRICULTURAL RESILIENCE ACCORDING TO INDIGENOUS KNOWLEDGE-BASED CASE STUDIES AND ECONOMIC QUANTITATIVE INTERNATIONAL PRODUCTION STUDIES: DIVERGENT REALITIES OR DIVERGENT REPRESENTATION?
Creators: name: MOYO, DUMISANI ZONDIWE
name: MOYO, DUMISANI ZONDIWE
Publisher: name: Unknown
Year: 2012
Subjects: International Relations/Trade

description: This study essentially seeks to assess the reconcilability of two themes of sustainable agriculture as a means to attenuating the sustainable agriculture impasse. It responds to the following question: relative to apparently pro-modernization international production studies, which element of pro-indigenous-knowledge case studies is atypical: the micro-environments studied or the methodologies deployed? In terms of methodology, the study applies the method of seemingly unrelated regression to a panel dataset of 124 countries mainly over the period 1981-2005 to estimate meta-production functions. The estimated coefficients are then used to evaluate series of values of the marginal physical/value productivity of agricultural land for each country. These values are used as indicators of agricultural resilience. The results of the analysis, which prove to be robust to the measure of agricultural output among other things, suggest that the resilience of national agricultural systems falls with increasing use of external inputs. It is demonstrated that this finding implies that agricultural resilience is eroded when Western science and technology is introduced from the angle of trying to replace rather than foster indigenous knowledge based systems. The contribution of this thesis has several implications for development and research policy. In general, economic analysis may need to (more fully) embrace the challenge of reworking its methods and approaches of research not least by opening up to alternative realities. In terms of development policy, the study unsettles the primacy of Western development, and reinforces evidence to the effect that sustainable agriculture might require enhancing, rather than nihilistically replacing, indigenous knowledges.
THE IMPACT OF COMMUNITY SAVINGS AND INVESTMENT PROMOTION PROGRAM ON HOUSEHOLD INCOME AND CREDIT MARKET PARTICIPATION IN KASUNGU DISTRICT, CENTRAL MALAWI
Creators: name: MWALUGHALI, OBED GILBERT FREDRICK
name: MWALUGHALI, OBED GILBERT FREDRICK
Publisher: name: Unknown
Year: 2013
Subjects: Agricultural Finance

description: This study analyses the impact of Community Savings and Investment Program (COMSIP) activities on household income and credit of member households of COMSIP groups in Kasungu District in Central Malawi. COMSIP groups are a form of village-based microcredit and community-based savings institutions with a number of socio-economic functions. The functions include mobilization of communities to save and/or invest their resources into income generating initiatives and provide credit. Using data from COMSIP Cooperative Union limited for Kasungu District in Malawi on income per capita and access to credit, this study tests the hypothesis that these variables were positively impacted on by membership to these COMSIP groups. The study uses Instrumental Variables (IV) methodology organized to reduce selection bias as well as endogeneity problems in the sample. The primary data on socio-economic and demographic variables was collected using household questionnaires, Key Informant Interviews and literature review as tools from a sample of 150 households. The study found that the variables such as sex of household head, age of household head, credit per capita, land per capita and distance of location of household to the COMSIP office, determine household decision to join COMSIP groups. Instrumental Variables analysis results show that the effect of COMSIP groups on household income and credit is very strong. The IV estimates indicate an increase of 88% income per capita and 96% increase in credit per capita of relatively poor participating households was significant at 5% and 1% levels of significance respectively. The findings also indicate that the simple targeting mechanism of COMSIP program based on household vii land ownership is effective. Thus, the efficiency of the COMSIP program can be enhanced by allocating credit to households with marginal landholding, for which the impact is the greatest. Although microfinance programs, especially among the rural poor people living below the standard poverty line of one US dollar per day have elicited different reactions from different stakeholders, there seems to be a general agreement that the program is useful amongst the strategies for ensuring improved household income and credit of rural Malawians, hence reduced poverty in the long-run.
Supplementary document for Investigation of unidirectional coupling of dipole emitters in valley photonic heterostructure waveguides - 6774911.pdf
Creators: name: Zhang, Qiankun
name: XING, XIAOHUA
name: Zou, Die
name: Liu, Yin
name: Mao, Bingxuan
name: Zhang, Guizhong
name: Ding, Xin
name: Yao, Jian-Quan
name: Wu, Liang
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplemental Document
The effects of the Tidal Force on Shear Instabilities in the Dust Layer of the Solar Nebula
Creators: name: Ishitsu, Naoki
name: Sekiya, Minoru
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The linear analysis of the instability due to vertical shear in the dust layer of the solar nebula is performed. The following assumptions are adopted throughout this paper: (1) The self-gravity of the dust layer is neglected. (2) One fluid model is adopted, where the dust aggregates have the same velocity with the gas due to strong coupling by the drag force. (3) The gas is incompressible. The calculations with both the Coriolis and the tidal forces show that the tidal force has a stabilizing effect. The tidal force causes the radial shear in the disk. This radial shear changes the wave number of the mode which is at first unstable, and the mode is eventually stabilized. Thus the behavior of the mode is divided into two stages: (1) the first growth of the unstable mode which is similar to the results without the tidal force, and (2) the subsequent stabilization due to an increase of the wave number by the radial shear. If the midplane dust/gas density ratio is smaller than 2, the stabilization occurs before the unstable mode grows largely. On the other hand, the mode grows faster by one hundred orders of magnitude, if this ratio is larger than 20. Because the critical density of the gravitational instability is a few hundreds times as large as the gas density, the hydrodynamic instability investigated in this paper grows largely before the onset of the gravitational instability. It is expected that the hydrodynamic instability develops turbulence in the dust layer and the dust aggregates are stirred up to prevent from settling further. The formation of planetesimals through the gravitational instabilities is difficult to occur as long as the dust/gas surface density ratio is equal to that for the solar abundance.
description: 37 pages, 21 figures and 1 table. Accepted for publication in Icarus
First Principles Calculations of Fe on GaAs (100)
Creators: name: Mirbt, S.
name: Sanyal, B.
name: Isheden, C.
name: Johansson, B.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have calculated from first principles the electronic structure of 0.5 monolayer upto 5 monolayer thick Fe layers on top of a GaAs (100) surface. We find the Fe magnetic moment to be determined by the Fe-As distance. As segregates to the top of the Fe film, whereas Ga most likely is found within the Fe film. Moreover, we find an asymmetric in-plane contraction of our unit-cell along with an expansion perpendicular to the surface. We predict the number of Fe 3d-holes to increase with increasing Fe thickness on $p$-doped GaAs.
description: 9 pages, 14 figures, submitted to PRB
Has OBM Found Its Heart? An Assessment of Procedural Acceptability Trends in the Journal of Organizational Behavior Management
Creators: name: Nastasi, Jessica
name: Simmons, Davis
name: Gravina, Nicole
Publisher: name: Taylor & Francis
Year: 2020
Subjects: Pharmacology
Biotechnology
Science Policy

description: Procedural acceptability measures can be used to inform and improve the long-term viability of interventions in Organizational Behavior Management (OBM). However, little is known regarding the use of procedural acceptability assessments across studies employing OBM methodology. In the present review, we evaluated the use of procedural acceptability measures across all articles in the Journal of Organizational Behavior Management (JOBM) for the first decade (1977–1986) and the most recent decade (2010 to 2019). We coded each article for industry, organizational performance problem type, participant type and reported use of procedural acceptability measures. Formal procedural acceptability measures were reported in 20% of articles included from the first decade and 35% of articles included from the most recent decade of JOBM. The use of procedural acceptability measures appears to be on an increasing trend, but the frequency of reported use of acceptability measures differed across industries. Furthermore, most articles included limited information on how acceptability was assessed. Unique considerations for the use of procedural acceptability measures in OBM and recommendations are discussed.
Psychana Ježek & Harten 2005, gen. nov.
Creators: name: Ježek, Jan
name: Harten, Antonius van
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Psychodidae
Psychana

description: Psychana gen. nov.
 Type species. Psychana rujumensis sp. nov. by present designation.
 Differential diagnosis. Antennomeres 13-14 fused, (apical) antennomere 15 separated, conical, meropleural suture conspicuously or at least slightly developed. This contrasts with the genera Ypsydocha Ježek, 1984 and Tinearia Schellenberg, 1803 in which antennomeres 13- 15 are fused, antennomere 15 is not conical and the meropleural suture is missing. The mentioned characters seem to be unique for this genus, especially in the shape of the apical flagellomere.
 Etymology. A mutation of Psychoda (gender feminine).
 Comments on the generic classification and extent of the genus. JEŽEK (1983, 1984) discussed in detail the position of six new genera excluded from the genus Psychoda auct. in the light of relationships among other genera. The complex taxonomical situation of the tribe Psychodini, comprising chiefly the clearly polyphyletic Psychoda s. lat. (nec Latreille, 1796) will not be fully resolved by the description of the new genus Psychana and may, in fact, become even more complicated. Sound comparative morphological studies, based not only on the last flagellomeres, are necessary for an acceptable division of the tribe. Worldwide it contains 447 species, 26 of which most probably belong to quite different tribes. Unfortunately, the clarification of their taxonomic status is hampered by the unavailability or poor condition of the type material. At any rate, future revisions of particular species groups are needed. The following species belong to the new genus: Psychana absidata (Quate & Quate, 1967) comb. nov. (from Psychoda Latreille, 1794) from New Guinea, P. moleva (Quate, 1965) comb. nov. (from Psychoda) from the Philippines, P. pellucida (Quate, 1965) comb. nov. (from Psychoda) from Malaysia, P. pinguicula (Quate & Quate, 1967) comb. nov. (from Psychoda) from New Guinea, and P. rujumensis sp. nov. from Yemen.
description: Published as part of Ježek, Jan & Harten, Antonius van, 2005, Further new taxa and little-known species of non-biting moth flies (Diptera, Psychodidae) from Yemen, pp. 199-220 in Acta Entomologica Musei Nationalis Pragae 45 on page 207, DOI: 10.5281/zenodo.5176593
Highly Sensitive, Fast Graphene Photodetector with Responsivity $>10^6$ A/W Using Floating Quantum Well Gate
Creators: name: Murali, Krishna
name: Abraham, Nithin
name: Das, Sarthak
name: Kallatt, Sangeeth
name: Majumdar, Kausik
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Graphene, owing to its zero bandgap electronic structure, is promising as an absorption material for ultra-wideband photodetection applications. However, graphene-absorption based detectors inherently suffer from poor responsivity due to weak absorption and fast photocarrier recombination, limiting their viability for low intensity light detection. Here we use a graphene/WS$_2$/MoS$_2$ vertical heterojunction to demonstrate a highly sensitive photodetector, where the graphene layer serves dual purpose, namely as the light absorption layer, and also as the carrier conduction channel, thus maintaining the broadband nature of the photodetector. A fraction of the photoelectrons in graphene encounter ultra-fast inter-layer transfer to a floating monolayer MoS$_2$ quantum well providing strong quantum confined photogating effect. The photodetector shows a responsivity of $4.4\times 10^6$ A/W at 30 fW incident power, outperforming photodetectors reported till date where graphene is used as light absorption material by several orders. In addition, the proposed photodetector exhibits an extremely low noise equivalent power ($N\!E\!P$) of $<4$ fW/$\sqrt{Hz}$ and a fast response ($\sim$ milliseconds) with zero reminiscent photocurrent. The findings are attractive towards the demonstration of graphene-based highly sensitive, fast, broadband photodetection technology.
Heavy-quark recombination in Z^0 decay
Creators: name: Jia, Yu
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We briefly review the recent advances of heavy-quark recombination mechanism. This mechanism predicts a class of power-suppressed 3-jet events in $Z^0$ decay, such as $b\bar{b}q$ and $b\bar{b}\bar{q}$. Furthermore, heavy quark fragmentation function also receives a contribution from this mechanism. Some light can be shed on the scaling of the maximum of the fragmentation function for S-wave heavy hadrons. We finally comment on a new variant of this mechanism which has important impact on the precision electroweak physics.
description: 4 pages, 2 figures, prepared for CIPANP2003: Conference on the Intersections of Particle and Nuclear Physics, New York City, May 19-24, 2003
Two years of detecting DM objects - the Solar system members
Creators: name: Drobyshevski, E. M.
name: Drobyshevski, M. E.
name: Izmodenova, T. Yu.
name: Telnov, D. S.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: With a probability >99% there are grounds to believe that our works on detection of the Dark Electric Matter Objects (daemons), which were lauched in 1996, are crowned with success. The daemons are the relic elementary Planckian black holes(m~30 microgramme) carrying stable electric charge of Ze=10e. During the last two years, the detector made of two horizontal ZnS(Ag) screens of 1 m^2 area has been recording the correlated time-shifted scintillations corresponding to flux 10^-5 m^-2 s^-1 of extraordinary penetrating nuclear-active particles which moved both down and upward with velocity of only \~5-30 km/s. The flux experiences seasonal variations with maxima supposedly corresponding to the Earth transition through shadow and anti-shadow created by the Sun in its motion relative the Galaxy disk daemon population. An accumulation of negative daemons, which stimulate the proton decay in ~1 microsec, inside the Earth and the Sun is explaining a lot of previusly non-understandable facts.
description: Talk presented at the 6th Euroasian Astron. Soc. Assembly (Moscow, 31 May, 2002); Astronomical & Astrophysical Transactions, Vol.22 (2003) (in press)
MOESM2 of A new vector system for targeted integration and overexpression of genes in the crop pathogen Fusarium solani
Creators: name: Nielsen, Mikkel
name: Holzwarth, Anna
name: Brew, Emmett
name: Chrapkova, Natalia
name: Samba Kaniki
name: Kastaniegaard, Kenneth
name: Sørensen, Trine
name: Westphal, Klaus
name: Wimmer, Reinhard
name: Sondergaard, Teis
name: Sørensen, Jens
Publisher: name: figshare
Year: 2019
Subjects: subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: Computational Biology

description: Additional file 2. fsr6 nucleotide sequence.
Lattice Dynamics of Solid Cubane within the Quasi-Harmonic Approximation
Creators: name: Yildirim, Taner
Publisher: name: arXiv
Year: 2003
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Solid cubane, which is composed of weakly interacting cubic molecules, exhibits many unusual and interesting properties, such as a very large thermal expansion and a first-order phase transition at T$_{p}$=394 K from an orientationally-ordered phase of R$\bar{3}$ symmetry to a {\it non-cubic} disordered phase of the same symmetry with a volume expansion of 5.4%, among the largest ever observed. We study the lattice dynamics of solid cubane within the quasi-harmonic and rigid-molecule approximation to explain some of these unusual dynamical properties. The calculated phonon density of states, dispersion curves and thermal expansion agree surprisingly well with available experimental data. We find that the amplitude of thermally excited orientational excitations (i.e. librons) increases rapidly with increasing temperature and reaches about 35$^{\rm o}$ just before the orientational phase transition. Hence, the transition is driven by large-amplitude collective motions of the cubane molecules. Similarly the amplitude of the translational excitations shows a strong temperature dependence and reaches one tenth of the lattice constant at T=440 K. This temperature is in fair agreement with the experimental melting temperature of 405 K, indicating that the Lindemann criterion works well even for this unusual molecular solid.
description: 15 pages, 6 figures (devoted to Prof. Ciraci in honor of his sixtieth birthday)
MALAWI AGRICULTURAL COMMODITY EXCHANGE AND SPATIAL RICE MARKET INTEGRATION
Creators: name: Katengeza, Samson P.
name: Katengeza, Samson P.
Publisher: name: Unknown
Year: 2009
Subjects: Agribusiness
Crop Production/Industries

description: There has been a growing debate regarding the role of the government and the effects of agricultural policies and interventions on agricultural markets. This therefore prompted this study to analyse the role of Malawi Agricultural Commodity Exchange (MACE) project as a market-enhancing intervention on aggregate market performance in Malawi using cointegration methods. MACE was introduced to improve agricultural market functioning through market information system. The study specifically examined the extent of spatial rice market integration, causality relationships among spatially separated markets and the dynamic adjustments of rice price series. The study used monthly price series data from 1994 to 2007 obtained from the ministry of agriculture. The data was divided into three sets; full sample, Pre-MACE and Post-MACE. Stationarity tests were done and it was noted that Salima and Bangula for full sample and Chitipa for Pre and Post-MACE price series were stationary in levels implying that these markets did not share the long-term trend with the major urban centres in Malawi in their respective samples. Cointegration results have shown that spatial rice market integration in Malawi is on average marginally improving. Compared to Pre-MACE period, cointegration and interdependence among markets appeared to be increasing during the Post-MACE era. Cointegration has also revealed that rice markets have been operating as a unified market system over the period of study. However, the study left out other factors affecting market integration due to financial and time constraints hence this improvement can not be fully accredited to MACE intervention. Nevertheless, since the aggregate picture observed in this study is an improvement of market integration the study recommends a promotion of MACE intervention to reach even more remote areas. The project needs to consider collecting and disseminating other market information such as trade flows, transaction costs and transfer costs. The study also recommends that further studies on market integration should take care of other structural determinants of market integration such as marketing infrastructure e.g. transportation, government policies and should consider application of the threshold autoregressive models (catering for transaction costs).
Probing ultracold chemistry using ion spectrometry
Creators: name: Liu, Yu
name: Grimes, David D.
name: Hu, Ming-Guang
name: Ni, Kang-Kuen
Publisher: name: arXiv
Year: 2019
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Rapid progress in atomic, molecular, and optical (AMO) physics techniques enabled the creation of ultracold samples of molecular species and opened opportunities to explore chemistry in the ultralow temperature regime. In particular, both the external and internal quantum degrees of freedom of the reactant atoms and molecules are controlled, allowing studies that explored the role of the long range potential in ultracold reactions. The kinetics of these reactions have typically been determined using the loss of reactants as proxies. To extend such studies into the short-range, we developed an experimental apparatus that combines the production of quantum-state-selected ultracold KRb molecules with ion mass and kinetic energy spectrometry, and directly observed KRb + KRb reaction intermediates and products [Science, 2019, 366, 1111]. Here, we present the apparatus in detail. For future studies that aim for detecting the quantum states of the reaction products, we demonstrate a photodissociation based scheme to calibrate the ion kinetic energy spectrometer at low energies.
description: 10 pages, 9 figures
MOESM3 of Malnutrition is common in children with cerebral palsy in Saudi Arabia â€“ a cross-sectional clinical observational study
Creators: name: Almuneef, Abdul
name: Almajwal, Ali
name: Alam, Iftikhar
name: Abulmeaty, Mahmoud
name: Bader Bader
name: Badr, Mohamed
name: Almuammar, May
name: Razak, Suhail
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Medicine
subject: Molecular Biology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 3. Percentage of children with CP who had adequate energy (white bar) and protein (grey bar) intake. The calorie and protein intake of children with cerebral palsy were used for assessment of nutrient-specific and percentage of nutrient intake based on the WHO estimated average intake as reference (Ref. [35]).
Spectator interactions and factorization in B -> pi ell nu decay
Creators: name: Beneke, M.
name: Feldmann, Th.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the factorization of different momentum modes that appear in matrix elements for exclusive B meson decays into light energetic particles for the specific case of B -> pi form factors at large pion recoil. We first integrate out hard modes with virtualities of order m_b^2 (m_b being the heavy quark mass), and then hard-collinear modes with virtualities m_b Lambda (Lambda being the strong interaction scale). The resulting effective theory contains soft and collinear fields with virtualities Lambda^2. We prove a previously conjectured factorization formula for B -> pi form factors in the heavy quark limit to all orders in alpha_s, paying particular attention to `endpoint singularities' that might have appeared in hard spectator interactions.
description: Contribution to International Europhysics Conference on High Energy Physics, EPS 2003, Aachen (Germany), 3 pages + 1 figure
MOESM2 of Malnutrition is common in children with cerebral palsy in Saudi Arabia – a cross-sectional clinical observational study
Creators: name: Almuneef, Abdul
name: Almajwal, Ali
name: Alam, Iftikhar
name: Abulmeaty, Mahmoud
name: Bader Bader
name: Badr, Mohamed
name: Almuammar, May
name: Razak, Suhail
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Science Policy

description: Additional file 2. Percent of children with cerebral palsy distributed in according to the severity of the disease. GMFCS level I –III less severe, while GMFCS level IV-V indicates more severity.
Non-spherical evolution of the line-driven wind instability
Creators: name: Gomez, E. L.
name: Williams, R. J. R.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper, we study the structure and stability of line driven winds using numerical hydrodynamic simulations. We calculate the radiation force from an explicit non-local solution of the radiation transfer equation, rather than a Sobolev approximation, without restricting the flow to one-dimensional symmetry. We find that the solutions which result have complex and highly variable structures, including dense condensations which we compare to observed variable absorption features in the spectra of early type stars.
description: Accepted by MNRAS, 17 pages, 15 postscript figures, 4 large figures appear as jpeg files
Application of Principal Component Analysis to establish proper basis for flow studies in heavy-ion collisions
Creators: name: Altsybeev, Igor
Publisher: name: arXiv
Year: 2019
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: It is shown that Principal Component Analysis (PCA) applied to event-by-event single-particle distributions in A-A collisions allows establishing the most optimal basis for anisotropic flow studies from data itself, in contrast to manual selection of the basis functions. PCA coefficients for azimuthal particle distributions are identical to Fourier coefficients from a conventional analysis techniques. PCA applied in longitudinal dimension reveals optimal basis that is similar to Legendre polynomial series. Analysis in both dimensions simultaneously allows studying the coupling of the longitudinal structure of events with the azimuthal anisotropy of particle emission.
description: 7 pages, 6 figures. Presented at WPCF-2019
Dynamic Radar Networks of UAVs
Creators: name: Guerra, Anna
name: Dardari, Davide
name: Djuric, Petar M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In the incoming years, the low-aerial space will be crowded by unmanned aerial vehicles (UAVs), which will be providing different services. In this expected context, an emerging problem is to detect and track unauthorized or malicious mini/micro UAVs. In contrast to current solutions mainly based on fixed terrestrial radars, this article will put forth the idea of a dynamic radar network (DRN) composed of UAVs able to smartly adapt their formation-navigation control to best track malicious UAVs in real-time, with high accuracy, and in a distributed fashion. To this end, some technological solutions and the main methods for target detection and tracking will be described. Further, an optimized navigation scheme will be developed according to an information-seeking approach. Some examples of simulation results and future directions of work will be finally presented highlighting the advantages of dynamic and reconfigurable networks over static ones.
SU(2) non-Abelian gauge field theory in one dimension on digital quantum computers
Creators: name: Klco, Natalie
name: Stryker, Jesse R.
name: Savage, Martin J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: An improved mapping of one-dimensional SU(2) non-Abelian gauge theory onto qubit degrees of freedom is presented. This new mapping allows for a reduced unphysical Hilbert space. Insensitivity to interactions within this unphysical space is exploited to design more efficient quantum circuits. Local gauge symmetry is used to analytically incorporate the angular momentum alignment, leading to qubit registers encoding the total angular momentum on each link. The results of a multi-plaquette calculation on IBM's quantum hardware are presented.
description: 8 pages, 4 figures, 3 tables
Young close-by neutron stars: the Gould Belt vs. the Galactic disc
Creators: name: Popov, S. B.
name: Turolla, R.
name: Prokhorov, M. E.
name: Colpi, M.
name: Treves, A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new population synthesis calculations of close young neutron stars. In comparison with our previous investigation we use a different neutron star mass spectrum and different initial spatial and velocity distributions. The results confirm that most of ROSAT dim radioquiet isolated neutron stars had their origin in the Gould Belt. Several tens of young neutron stars can be identified in future in ROSAT data at low galactic latitudes and some of them also can be EGRET unidentified sources.
description: 14 pages, 8 figures, submitted to Ap&SS, corrected some typos
Incremental learning of environment interactive structures from trajectories of individuals
Creators: name: Campo, Damian
name: Bastani, Vahid
name: Marcenaro, Lucio
name: Regazzoni, Carlo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: This work proposes a novel method for estimating the influence that unknown static objects might have over mobile agents. Since the motion of agents can be affected by the presence of fixed objects, it is possible use the information about trajectories deviations to infer the presence of obstacles and estimate the forces involved in a scene. Artificial neural networks are used to estimate a non-parametric function related to the velocity field influencing moving agents. The proposed method is able to incrementally learn the velocity fields due to external static objects within the monitored environment. It determines whether an object has a repulsive or an attractive influence and provides an estimation of its position and size. As stationarity is assumed, i.e., time-invariance of force fields, learned observation models can be used as prior knowledge for estimating hierarchically the properties of new objects in a scene.
LSND anomaly from CPT violation in four-neutrino models
Creators: name: Barger, V.
name: Marfatia, D.
name: Whisnant, K.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The LSND signal for \barν_μto \barν_e oscillations has prompted supposition that there may be a fourth light neutrino or that CPT is violated. Neither explanation provides a good fit to all existing neutrino data. We examine the even more speculative possibility that a four-neutrino model with CPT violation can explain the LSND effect and remain consistent with all other data. We find that models with a 3+1 mass structure in the neutrino sector are viable; a 2+2 structure is permitted only in the antineutrino sector.
description: 5 pages, 3 figures
MOESM1 of Concordances and differences between a unidimensional and multidimensional assessment of frailty: a cross-sectional study
Creators: name: Elst, Michael
name: Schoenmakers, Birgitte
name: Veld, Linda
name: Roeck, Ellen
name: Vorst, Anne
name: Kempen, Gertrudis
name: Witte, Nico
name: Lepeleire, Jan
name: Schols, Jos
Publisher: name: figshare
Year: 2019
Subjects: subject: Biochemistry
subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Developmental Biology

description: Additional file 1: Figure S1. Sample size.
A multiband study of Hercules A. II. Multifrequency VLA imaging
Creators: name: Gizani, Nectaria A. B.
name: Leahy, J. P.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have mapped the powerful radio galaxy Hercules A at six frequencies spanning 1295 to 8440 MHz using the VLA in all four configurations. Here we discuss the structure revealed in total intensity, spectral index, polarization, and projected magnetic field. Our observations clearly reveal the relation between the bright jets, radio source. The jets and rings form a coherent structure with a dramatically flatter spectrum than the surrounding lobes and bridge, strongly suggesting that they represent a recently renewed outburst from the active nucleus. The spectrum of the lobes is also steeper than in typical radio sources, and steepens further towards the centre. The compact core is optically thin and also has a remarkably steep spectrum (alpha \~ -1.2). There is some evidence that the old lobe material has been swept up and compressed ahead of the new outburst. We interpret the dramatic asymmetry in the bright structure, and more subtle differences between diffuse lobe structures, in terms of relativistic beaming combined with front-to-back light-travel delays which mean that we view the two lobes at different stages of the outburst. After correcting for Faraday rotation the projected magnetic field closely follows the edge of the lobes, the jets, and the rings; the field pattern in the two lobes is broadly similar. We confirm a strong asymmetry in depolarization and Faraday rotation, with the jet side the less depolarized and the flatter spectrum, consistent with general correlations between these asymmetries. The spectral index asymmetry is clearly present in the `old' lobe material and so, at least in this case, is not due to beaming; but it can be understood in terms of the light-travel delay.
description: 25 pages, 18 figures, accepted for publication in MNRAS. For associated jpeg files, see http://www.jb.man.ac.uk/~jpl/hera/
Determinants and Patterns of Income Diversification among Smallholder Farmers in Akaki District, Ethiopia
Creators: name: Teshome, Bekelu
name: Edriss, Abdi-Khalil
name: Teshome, Bekelu
name: Edriss, Abdi-Khalil
Publisher: name: Unknown
Year: 2013
Subjects: subject: Consumer/Household Economics
subject: Labor and Human Capital
subject: Income diversification
subject: off-farm income
subject: farm income
subject: Tobit
subject: Ethiopia

description: This research was initiated to find out the different factors affecting income diversification and assess patterns of income diversification in Akaki district of Ethiopia. Two stage random sampling with Proportionate Probability Sampling (PPS) was used to collect cross-sectional data from 155 farm households using structured questionnaire. The data were also supported with documents from agricultural and rural development office and farmers cooperatives in the study area. The Tobit model was used to analyze the factors determining the income diversification. From the descriptive statistics, sales of homemade farm implements and drinks, and non-farm employment was found to be the most important sources of off-farm income in the study area. The results from Tobit model indicate that, family size; number of extension visit per year and education level has a positive significant effect over income diversification. On the other hand, age of the household head; land size and average distance from market have negative and significant influence on the household’s decision towards diversification.
Parallax and Distance Estimates for Fourteen Cataclysmic Variable Stars
Creators: name: Thorstensen, J. R.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I used the 2.4 m Hiltner telescope at MDM Observatory in an attempt to measure trigonometric parallaxes for 14 cataclysmic variable stars. Techniques are described in detail. In the best cases the parallax uncertainties are below 1 mas, and significant parallaxes are found for most of the program stars. A Bayesian method which combines the parallaxes together with proper motions and absolute magnitude constraints is developed and used to derive distance estimates and confidence intervals. The most precise distance derived here is for WZ Sge, for which I find 43.3 (+1.6, -1.5) pc. Six Luyten Half-Second stars with previous precise parallax measurements were re-measured to test the techniques, and good agreement is found.
description: 33 pages, 3 figures. Astronomical Journal, accepted
MOESM1 of A new vector system for targeted integration and overexpression of genes in the crop pathogen Fusarium solani
Creators: name: Nielsen, Mikkel
name: Holzwarth, Anna
name: Brew, Emmett
name: Chrapkova, Natalia
name: Samba Kaniki
name: Kastaniegaard, Kenneth
name: Sørensen, Trine
name: Westphal, Klaus
name: Wimmer, Reinhard
name: Sondergaard, Teis
name: Sørensen, Jens
Publisher: name: figshare
Year: 2019
Subjects: subject: Space Science
subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Plant Biology
subject: Computational Biology

description: Additional file 1. List of primers.
The core/envelope symmetry in pulsating stars
Creators: name: Montgomery, M. H.
name: Metcalfe, T. S.
name: Winget, D. E.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We demonstrate that there is an inherent symmetry in the way high-overtone stellar pulsations sample the core and the envelope, which can potentially lead to an ambiguity in the asteroseismologically derived locations of internal structures. We provide an intuitive example of the source of this symmetry by analogy with a vibrating string. For the stellar case, we focus on the white dwarf stars, establishing the practical consequences for high-order white dwarf pulsations both analytically and numerically. In addition, we verify the effect empirically by cross-fitting two different structural models, and we discuss the consequences that this approximate symmetry may have for past and present asteroseismological fits of the pulsating DBV, GD 358. Finally, we show how the signatures of composition transition zones that are brought about by physically distinct processes may be used to help alleviate this potential ambiguity in our asteroseismological interpretation of the pulsation frequencies observed in white dwarf stars.
description: Accepted for publication in MNRAS; 8 pages, 8 figures
Evidence for Flash Mixing in He-rich sdB Stars
Creators: name: Sweigart, Allen V.
name: Lanz, Thierry
name: Brown, Thomas M.
name: Hubeny, Ivan
name: Landsman, Wayne B.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present FUSE spectra of three He-rich sdB stars. Two of these stars, PG1544+488 and JL87, reveal extremely strong C III lines, suggesting that they have mixed triple-alpha carbon from the deep interior out to their surfaces. Using TLUSTY NLTE line-blanketed model atmospheres, we find that PG1544+488 has a surface composition of 96% He, 2% C, and 1% N. JL87 shows a similar surface enrichment of C and N but still retains a significant amount of hydrogen. In contrast, the third star, LB1766, is devoid of hydrogen and strongly depleted of carbon, indicating that its surface material has undergone CN-cycle processing. We interpret these observations with new evolutionary calculations which suggest that He-rich sdB stars with C-rich compositions arise from a delayed helium-core flash on the white-dwarf cooling curve. During such a flash the interior convection zone will penetrate into the stellar envelope, thereby mixing the envelope with the He- and C-rich core. Such "flash-mixed" stars will arrive on the extreme horizontal branch (EHB) with He- and C-rich surface compositions and will be hotter than the hottest canonical EHB stars. Two types of flash mixing are possible: "deep" and "shallow", depending on whether the hydrogen envelope is mixed deeply into the site of the helium flash or only with the outer layers of the core. Based on both their stellar parameters and surface compositions, we suggest that PG1544+488 and JL87 are examples of "deep" and "shallow" flash mixing, respectively.
description: 4 pages, 2 figures, to appear in "Extreme Horizontal Branch Stars and Related Objects", Astrophysics and Space Science, Kluwer Academic Publishers, edited by P. Maxted
Strongly coupled coherent phonons in single-layer MoS$_2$
Creators: name: Trovatello, C.
name: Miranda, H. P. C.
name: Molina-Sánchez, A.
name: Varillas, R. Borrego
name: Manzoni, C.
name: Moretti, L.
name: Ganzer, L.
name: Maiuri, M.
name: Wang, J.
name: Dumcenco, D.
name: Kis, A.
name: Wirtz, L.
name: Marini, A.
name: Soavi, G.
name: Ferrari, A. C.
name: Cerullo, G.
name: Sangalli, D.
name: Conte, S. Dal
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We present a transient absorption setup combining broadband detection over the visible-UV range with high temporal resolution ($\sim$20fs) which is ideally suited to trigger and detect vibrational coherences in different classes of materials. We generate and detect coherent phonons (CPs) in single layer (1L) MoS$_2$, as a representative semiconducting 1L-transition metal dichalcogenide (TMD), where the confined dynamical interaction between excitons and phonons is unexplored. The coherent oscillatory motion of the out-of-plane $A'_{1}$ phonons, triggered by the ultrashort laser pulses, dynamically modulates the excitonic resonances on a timescale of few tens fs. We observe an enhancement by almost two orders of magnitude of the CP amplitude when detected in resonance with the C exciton peak, combined with a resonant enhancement of CP generation efficiency. Ab initio calculations of the change in 1L-MoS$_2$ band structure induced by the $A'_{1}$ phonon displacement confirm a strong coupling with the C exciton. The resonant behavior of the CP amplitude follows the same spectral profile of the calculated Raman susceptibility tensor. This demonstrates that CP excitation in 1L-MoS$_2$ can be described as a Raman-like scattering process. These results explain the CP generation process in 1L-TMDs, paving the way for coherent all-optical control of excitons in layered materials in the THz frequency range.