cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
High-pressure synthesis of ultraincompressible hard rhenium nitride pernitride Re$_{2}$(N$_{2}$)N$_{2}$ stable at ambient conditions
Creators: name: Bykov, Maxim
name: Chariton, Stella
name: Fei, Hongzhan
name: Fedotenko, Timofey
name: Aprilis, Georgios
name: Ponomareva, Alena V.
name: Tasnádi, Ferenc
name: Abrikosov, Igor A.
name: Merle, Benoit
name: Feldner, Patrick
name: Vogel, Sebastian
name: Schnick, Wolfgang
name: Prakapenka, Vitali B.
name: Greenberg, Eran
name: Hanfland, Michael
name: Pakhomova, Anna
name: Liermann, Hanns-Peter
name: Katsura, Tomoo
name: Dubrovinskaia, Natalia
name: Dubrovinsky, Leonid
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Here we report the synthesis of metallic, ultraincompressible (bulk modulus $K_{0}$ = 428(10) GPa) and very hard (nanoindentation hardness 36.7(8) GPa) rhenium (V) nitride pernitride Re$_{2}$(N$_{2}$)N$_{2}$. While the empirical chemical formula of the compound, ReN$_{2}$, is the same as for other known transition metals pernitrides, e.g. IrN$_{2}$, PtN$_{2}$, PdN$_{2}$ and OsN$_{2}$, its crystal chemistry is unique. The known pernitrides of transition metals consist of a metal in the oxidation state +IV and pernitride anions N$_{2}^{4-}$. ReN$_{2}$ contains both pernitride N$_{2}^{4-}$ and discrete N$^{3-}$ anions, which explains its exceptional properties. Moreover, in the original experimental synthesis of Re$_{2}$(N$_{2}$)N$_{2}$ performed in a laser-heated diamond anvil cell via a direct reaction between rhenium and nitrogen at pressures from 40 to 90 GPa we observed that the material was recoverable at ambient conditions. Consequently, we developed a route to scale up its synthesis through a reaction between rhenium and ammonium azide, NH$_{4}$N$_{3}$, in a large-volume press at 33 GPa. Our work resulted not only in a discovery of a novel material with unusual crystal chemistry and a set of properties attractive for potential applications, but also demonstrated a feasibility of surmounting conceptions common in material sciences.
Nanometer Scale Dielectric Fluctuations at the Glass Transition
Creators: name: Russell, E. Vidal
name: Israeloff, N. E.
name: Walther, L. E.
name: Gomariz, H. Alvarez
Publisher: name: arXiv
Year: 1998
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Using non-contact scanning probe microscopy (SPM) techniques, dielectric properties were studied on 50 nanometer length scales in poly-vinyl-acetate (PVAc) films in the vicinity of the glass transition. Low frequency (1/f) noise observed in the measurements, was shown to arise from thermal fluctuations of the electric polarization. Anomalous variations observed in the noise spectrum provide direct evidence for cooperative nano-regions with heterogeneous kinetics. The cooperative length scale was determined. Heterogeneity was long-lived only well below the glass transition for faster than average processes.
description: 4 pages, 4 embedded PS figures, RevTeX - To appear in Phys. Rev. Lett
Quantum correlation enhanced weak field detection in optomechanical system
Creators: name: Zhang, Wen-Zhao
name: Chen, Li-Bo
name: Cheng, Jiong
name: Jiang, Yun-Feng
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a theoretical scheme to enhance the signal-to-noise ratio in ultrasensitive detection with the help of quantum correlation. By introducing the auxiliary oscillator and treated as an added probe for weak field detection, the additional noise can be greatly suppressed and the measurement accuracy may even break the standard quantum limit. We use the magnetic field as an example to exhibit the detection capability of our scheme. The result show that, comparing with the traditional detection protocol, our scheme can have higher signal-to-noise ratio and better detection accuracy. Furthermore, the signal intensity detection curve shows a good linearity. Our results provide a promising platform for reducing the additional noise by utilizing quantum correlation in ultrasensitive detection.
VITILIGO DAVOSIDA PSIXOLOGIK YONDASHUVNING ROLI
Creators: name: Abdujabborova, Sitora
name: Kuchkarov, Humoyun
name: Umarov, Jasur
Publisher: name: Zenodo
Year: 2025

description: Mazkur tezisda vitiligo davosida psixologik yondashuvning ro`li mavzusida gam yuritiladi. Vitiligo - bu pigmentatsiya buzilishi bo'lib, u insonning psixologik holatiga jiddiy ta'sir ko'rsatadi. Ushbu kasallik nafaqat jismoniy balki ruhiy tushkunlik, o'ziga bo'lgan ishonchning pasayishi va ijtimoiy izolyatsiyaga sabab bo'lishi mumkin. Tadqiqotlar shuni ko'rsatadiki, vitiligoni davolashda psixologik yondashuv muhim rol o'ynaydi. Ushbu maqolada vitiligo bilan kasallangan shaxslarning psixologik holatini yaxshilash usullari, stress va depressiya bilan kurashish metodlari, shuningdek, ijtimoiy qo‘llab-quvvatlashning ahamiyati ilmiy asosda tahlil qilinadi. Tadqiqot davomida kognitiv-bihevioral terapiya, stressni boshqarish texnikalari va psixo-ta'lim metodlari vitiligo kasalligini yengishda samarali bo‘lishi mumkinligi ko‘rsatib o‘tiladi. Shuningdek, bemorlarning o‘ziga bo‘lgan ishonchini oshirish va jamiyatdagi stigmatizatsiyani kamaytirish muhim omil ekanligi asoslab beriladi.
The First Detection of a Strong Magnetic Field in a FS CMa Star
Creators: name: Korcakova, D.
name: Miroshnichenko, A.S.
name: Sestito, F
name: Zharikov, S.V
name: Manset, N.
name: Votruba, V
name: Shlechta, M.
name: Danford, S
name: Kroupa, P.
name: Raj, A.
name: Dvorakova, N.
name: Khokhlov, S.A.
name: Kusakin, AV.
name: Reva, I.V
name: Kokumbaeva, R.I.
name: Omarov, Ch.T.
name: Chojnowski, S.D
name: Alimgazinova, N.Sh.
name: Naurzbayeva, A.Zh
name: Kuratova, A.K
Publisher: name: Zenodo
Year: 2021
Subjects: Stars
FS CMa Star
Magnetic field

description: We report the first detection of a magnetic field in a star of the FS CMa type, a subgroup of objects showing the B[e] phenomenon. These stars are surrounded by an extended circumstellar medium, which is responsible for emission lines from both permitted and forbidden transitions, a large infrared excess due to dust, and a very complicated variability. The split of magnetically sensitive lines in the spectra of IRAS 17449+2320 unexpectedly revealed a strong magnetic field with strength of 6.2+/-0.2 kG. Our discovery indicates the importance of considering magnetic fields in studies of FS CMa stars, whose evolutionary status is still unknown. We found that IRAS 17449+2320 has an effective temperature of ~10,000 K. Several spectral lines affected by the circumstellar medium (e.g., O I 7772–7775 AA, Balmer lines) regularly exhibit redshifted absorption components with a period of 36.13 days. The same periodicity shows up in the equivalent width of the Halpha line. The analysis of our data suggests three possible scenarios for the nature and evolutionary status of the object: i) a magnetic A-type star primary with a hot dwarf secondary, ii) a binary merger, or iii) a magnetic Ap star near the terminal age main sequence. The latter one may represent an object which has been sought for decades and fills the gap in the observations and theory of magnetic Ap stars.
A cranked self-consistent mean-field description of the triaxially deformed rotational bands in 138Nd
Creators: name: Shi, Yue
Publisher: name: arXiv
Year: 2019
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The survey of different configurations near Fermi surface of 138Nd results in 12 lowest configurations, at both positive- and negative-deformations. These are calculated to be the energetically lowest configurations. The results show that, for both EDFs, the rotational states based on positive-minimum, which is at gamma~35, are lower than the respective configurations with negative-deformation. The general trends of the spin-versus-omega curve, and the energy-versus-spin curve reproduce well those of the experimental data. Further, for the observed bands `T1-T8', the calculated results using SLy4L allows the configurations of the observed bands to be assigned. The calculations predict transitional quadrupole moments, which can be used to compare with future experimental data. The current cranked self-consistent mean-field calculations of the near-yrast high-spin rotational bands in 138Nd reproduce well the experimental data. The results suggest that the experimentally observed bands can be assigned to the calculated bands with various configurations at the positive-deformation. The predictions of the current calculations are complementary to that of the well-know macroscopic-microscopic calculations, both of which await future experiment to verify.
description: 9 pages, 8 figures, 3 tables.; to be published in Physical Review C
Existence of weak solutions to a dynamic model for smectic-A liquid crystals under undulations
Creators: name: Emmrich, Etienne
name: Lasarzik, Robert
Publisher: name: arXiv
Year: 2018
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q35, 35K52, 76A15

description: A nonlinear model due to Soddemann et al. [37] and Stewart [38] describing incompressible smectic-A liquid crystals under flow is studied. In comparison to previously considered models, this particular model takes into account possible undulations of the layers away from equilibrium, which has been observed in experiments. The emerging decoupling of the director and the layer normal is incorporated by an additional evolution equation for the director. Global existence of weak solutions to this model is proved via a Galerkin approximation with eigenfunctions of the associated linear differential operators in the three-dimensional case.
title: Modelling impacts of climate change on maize production in south-eastern Kazakhstan
Creators: name: Duisebek, Baktybek
Publisher: name: University of Reading
Year: 2022

description: South-East Kazakhstan (SEK) is an important agricultural region which strongly depends on 
irrigation using meltwater from the mountain snowpack and glaciers. The region is
experiencing a significant temperature rise which is projected to continue potentially 
threatening agricultural production. This study models impacts of climate change on 
agricultural production and water use in SEK with a focus on maize production on irrigated 
farmland. This is the first study modelling crop responses to climate change in the region 
and as such, it initiated collection of data required for modelling. For this reason, modelling 
is conducted at field scale.
Two water - crop models, AquaCrop and SALTMED, have been set up, calibrated, and 
validated using the data from the 2016-2019 growing seasons. The statistical metrics used 
to evaluate model performance under the present climate confirm robust performance of
both models. Future projections of growing cycle, crop water requirement, and maize yield
have been developed for the Representative Concentration Pathways (RCP), RCP4.5 and 
RCP8.5, for the future time slices of 2020 - 2049, 2040 – 2069, and 2070 – 2099 using data 
from several Global Circulation Models, which have been downscaled and bias corrected. 
The results from both crop models indicate that growing cycle is expected to be shortened
by up to 50 days by 2100. This significant reduction is mainly associated with a strong 
climatic warming projected for the growing season. The shortening of the growing cycle can 
lead to a reduction in crop water requirements which are projected to decline by 16-24% 
and 11-15%, using SALTMED and AquaCrop, respectively, by the end of the 21st century. 
Maize yields are projected to decline by 11.2 % and 6.8 % in the AquaCrop and SALTMED
simulations, respectively. 
The developed projections can be used to inform the development of adaptation strategies 
and practices by individual farmers and regional decision-makers contributing to the 
development of adaptive capacities and promoting farmers’ resilience to future climate 
change in SEK. Adaptation measures can include changing planting dates, irrigation practices, 
and using new cultivars adapted to higher temperatures and shorter growing season.
Stephanodes Enock 1909
Creators: name: Huber, John T.
name: Read, Jennifer D.
name: Triapitsyn, Serguei V.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Stephanodes

description: STEPHANODES Enock, 1909
(Figs 255–260)
 Stephanodes Enock, 1909: 457. Type species: Stephanodes elegans Enock, 1909, by monotypy. See Huber et al. (2020) for generic synonyms and their type species.
 Diagnosis. Vertex with large shallow depressions outside each ocellus (Fig. 256); scape with inner surface rasp-like (Fig. 257); mesonotal spiracle much closer to anterior apex of notaulus than to dorsal apex of prepectus (Fig. 259); mesosoma and metasoma smooth and shiny (Figs 259, 260); fore wing with parastigma slightly elongate (Fig. 258); petiole attached to gastral sternum posteriorly.
 Discussion. Stephanodes belongs to the Polynema group of genera as defined by Triapitsyn & Berezovskiy (2007). In the Afrotropical region this group also includes Acmopolynema, Ganomymar, Mymar, Mymarilla, Palaeoneura and Polynema. Stephanodes is unique in having the mesonotal spiracle advanced, closer to the anterior apex of the notaulus than to the dorsal apex of the prepectus.
 Afrotropical hosts. Unknown.
 Important reference. Huber & Fidalgo (1997).
description: Published as part of Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2021, Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Afrotropical region, pp. 1-166 in Zootaxa 5036 (1) on page 47, DOI: 10.11646/zootaxa.5036.1.1, http://zenodo.org/record/5502952
Digitalização fotos antigas (Mihno Dgil)
Creators: name: Mihno Dgil Brito
Publisher: name: figshare
Year: 2019
Subjects: subject: Uncategorized
subject: 80609 Information Systems Management
subject: FOS: Computer and information sciences

description: Comparação entre as imagens tiradas pelo celular e pelas imagens digitalizadas, da matéria de Tecnologia da Informação do curso de Arquivologia da UFPB.
The Innermost Stable Circular Orbit in Compact Binaries
Creators: name: Baumgarte, Thomas W.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Newtonian point mass binaries can be brought into arbitrarily close circular orbits. Neutron stars and black holes, however, are extended, relativistic objects. Both finite size and relativistic effects make very close orbits unstable, so that there exists an innermost stable circular orbit (ISCO). We illustrate the physics of the ISCO in a simple model problem, and review different techniques which have been employed to locate the ISCO in black hole and neutron star binaries. We discuss different assumptions and approximations, and speculate on how differences in the results may be explained and resolved.
description: 13 pages, 2 figures, to appear in "Astrophysical Sources of Gravitational Radiation", edited by J. M. Centrella (AIP Press)
A Field Visit from FABI-UP to MWIS-HZI
Creators: name: Ebada, Sherif S.
name: Cedeño–Sanchez, Marjorie
name: Fushimi, Sara
name: Berger, Leonie
Publisher: name: Zenodo
Year: 2024

description: Lecture at FABI/University of Pretoria of the German delegation of the Mycobiomics project that visited South Africa in Spring of 2024
New integrable version of the degenerate supersymmetric t-J model
Creators: name: Alcaraz, F. C.
name: Bariev, R. Z.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A new integrable version of the degenerate supersymmetric t-J model is proposed. In this formulation instead of restricting single occupancy of electrons at each lattice site we may have up to two electrons at each site. As a requirement of exact integrability the hopping interaction turns out to be correlated with the density of electrons in the neighboring sites. The exact solution of the model is obtained through the coordinate Bethe anzatz.
description: 12 pages, 3 figures
Atyphella atra Lea Antennal 1921
Creators: name: Ballantyne, Lesley A.
name: Lambkin, Christine
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Lampyridae
Atyphella
Atyphella atra

description: Atyphella atra Lea, 1921 (Figs 9, 10, 83–85) Atyphella atra Lea, 1921a:198. Ballantyne in Calder 1998: 177 (comb. rev.) Ballantyne & Lambkin, 2000: 25; 2001: 374, 2006: 30. Luciola (Luciola) atra (Lea). McDermott, 1966: 99. Luciola (Atyphella) atra (Lea). Ballantyne & McLean, 1970: 281. Moore, 1989: 136. Holotype. Male. AUSTRALIA: 28.19S, 153.05E, Lamington National Park (C2290 QM). Diagnosis. Males distinguished from most other Atyphella by the acute frons-vertex junction, the small (probably non–functional) mouthparts, the contiguous antennal sockets, the brown – dark brown parallelsided elytra; females pale coloured with fully developed elytra and vestigial hind wings; paler male specimens very like A. similis, which has angulate posterolateral pronotal corners, separated antennal sockets, well developed mouthparts and flightless brachelytral females. Ballantyne and Lambkin (2000) distinguished atra and similis most obviously by their distinctive females.
description: Published as part of Ballantyne, Lesley A. & Lambkin, Christine, 2009, Systematics of Indo-Pacific fireflies with a redefinition of Australasian Atyphella Olliff, Madagascan Photuroluciola Pic, and description of seven new genera from the Luciolinae (Coleoptera: Lampyridae), pp. 1-188 in Zootaxa 1997 on pages 42-43
description: {"references": ["Lea, A. M. (1921 a) On Coleoptera, mostly from Queensland. Memoirs of the Queensland Museum 7, 182 - 240. (Lampyridae, 197 - 198).", "Calder, A. A. (1998) Coleoptera: Elateroidea. In: Wells, A. (ed.) Zoological Catalogue of Australia 29.6. (CSIRO Publishing: Melbourne).", "Ballantyne, L. A. & Lambkin, C. (2000) Lampyridae of Australia (Coleoptera: Lampyridae: Luciolinae: Luciolini). Memoirs of the Queensland Museum 46 (1), 15 - 93.", "McDermott, F. A. (1966) Lampyridae Pars. 9. Coleopterorum Catalogus (Junk-Schenkling) (Ed. Sec), 1 - 149 (Luciolini, 98 - 118).", "Ballantyne, L. A. & McLean, M. R. (1970) Revisional studies on the firefly genus Pteroptyx Olivier (Coleoptera: Lampyridae: Luciolinae: Luciolini). Transactions of the American Entomological Society 96, 223 - 305.", "Moore, B. P. (1989) A guide to the Beetles of South-Eastern Australia. Fascicle No 9. Australian Entomological Magazine 16, 133 - 148."]}
Quantum cosmology at the turn of Millennium
Creators: name: Barvinsky, A. O.
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A brief review of the modern state of quantum cosmology is presented as a theory of quantum initial conditions for inflationary scenario. The no-boundary and tunneling states of the Universe are discussed as a possible source of probability peaks in the distribution of initial data for inflation. It is emphasized that in the tree-level approximation the existence of such peaks is in irreconcilable contradiction with the slow roll regime -- the difficulty that is likely to be solved only on account of quantum gravitational effects. The low-energy (typically GUT scale) mechanism of quantum origin of the inflationary Universe with observationally justified parameters is presented for closed and open inflation models with a strong non-minimal coupling.
description: 22 pages, LaTeX, Talk given at MG9 Meeting
Predictable and Unpredictable Uncertainties Delaying the Completion of the Kabatas-Mahmutbey Metro Construction (Istanbul/Turkey)
Creators: name: M. Ozcelik And F. Tuzlu
Publisher: name: Southeast Asian Geotechnical Society
Year: 2022
Subjects: Uncertainty
Tunnel
Construction
3D Modelling
COVID-19

description: The Geotechnical Engineering Journal of the SEAGS & AGSSEA, 53, 3, pp 1-6
Income Mobility in America
Creators: name: Navjeevan, Manu
Publisher: name: Carnegie Mellon University
Year: 2019
Subjects: Economics

description: This paper looks at both intragenerational and intergenerational income mobility in America. The paper is divided in two parts. The first part of the paper uses social security data to find that intragenerational income mobility in America has fallen by half over the past 50 years. I then consider which statistical model of income are consistent with the observed decline in income mobility. This paper finds that the AR(1) and ARIMA models do not do a good job of explaining mobility rates without using unreasonable parameters. However, the results from these models suggest that lowering the variance in shocks to income from year to year is more important in explaining falls in mobility than changes in year-to-year persistence of income. The model of income dynamics proposed by Guvenen (2016) does a better job of generating mobility rates seen in the data, but also provides somewhat limited explanation for falling mobility rates in our analysis. The results from the Guvenen model also suggest that variation in annual income shocks is significant in explaining falling mobility rates. In the second part I examine income mobility looking for significant county-level covariates to Chetty (2016) estimates on the causal effect of counties on income mobility. The analysis finds that social capital, income shares, and policy variables such as households on social security and size of public assistance in a county are significant in explaining variance in county level mobility rates. This paper also estimates the causal effects of housing rents as a percent of income using instrumental variable regression and estimates that a 1% increase in average housing rents as a percent of income in a county leads to a -0.21 change in the causal effect of spending an additional year in the county on percentile income rank at age 26. This paper also uses results from regressions to predict which counties would have the highest mobility rates in the future. Finally, the relationship between intergenerational mobility rates and inter-county migration is studied. The analysis finds that higher mobility rates are not strongly related to increased migration to a county, suggesting that movers have limited knowledge of which counties lead to better outcomes
Statistics with epidemiology of COVID-19
Creators: name: Shumskaya, Maria
name: Benjamin, Shakira
name: Niepielko, Matthew
name: Lorusso, Nicholas
Publisher: name: QUBES Educational Resources
Year: 2021

description: Introduction into heat maps, non-parametric t-test and GIF (optional) in R using an original dataset on COVID-19 infections from different counties of New Jersey, USA. Suitable for students who have basic experience in R.
Gellan Gum for Strengthening Bentonite-Sand Slurry
Creators: name: T.P.A. Tran, T. Katsumi
Publisher: name: Southeast Asian Geotechnical Society
Year: 2022
Subjects: Gellan gum
Bentonite
Silica sand
Unconfined compressive strength
Thermal curing process

description: The Geotechnical Engineering Journal of the SEAGS & AGSSEA, 53, 3, pp 7-14
First Observation of Inclusive $B$ Decays to the Charmed Strange Baryons $Ξ_{c}^{0}$ and $Ξ_{c}^{+}$
Creators: name: CLEO Collaboration
name: al, B. Barish et
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Using data collected in the region of the Upsilon(4S) resonance with the CLEO II detector operating at the Cornell Electron Storage Ring CESR, we present the first observation of B mesons decaying into the charmed strange baryons Xi_c0 and Xi_c+. We find 79 +/- 27 Xi_c0 and 125 +/- 28 Xi_c+ candidates from B decays, leading to product branching fractions of BR(Bbar -> Xi_c0 X)BR(Xi_c0 -> Xi- pi+) = (0.144 +/- 0.048 +/- 0.021) x 10^-3 and BR(Bbar -> Xi_c+ X)BR(Xi_c+ -> Xi- pi+ pi+) = (0.453 +/- 0.096 +0.085-0.065) x 10^-3.
description: 11 pages, postscript file also available through http://w4.lns.cornell.edu/public/CLNS
Comparative Study on Strength and Permeability of Siliceous Sand Treated by MICP and Cement Grouting
Creators: name: Hai-Lei Kou, Wang-Xiang Hou
Publisher: name: Southeast Asian Geotechnical Society
Year: 2022
Subjects: Siliceous sands
MICP
Cement grouting
Unconfined compressive strength
Coefficient of permeability

description: The Geotechnical Engineering Journal of the SEAGS & AGSSEA, 53, 3, pp 15-21
Additional file 1 of First-in-human use of 11C-CPPC with positron emission tomography for imaging the macrophage colony-stimulating factor 1 receptor
Creators: name: Coughlin, Jennifer M.
name: Du, Yong
name: Lesniak, Wojciech G.
name: Harrington, Courtney K.
name: Brosnan, Mary Katherine
name: O’Toole, Riley
name: Zandi, Adeline
name: Sweeney, Shannon Eileen
name: Abdallah, Rehab
name: Wu, Yunkou
name: Holt, Daniel P.
name: Hall, Andrew W.
name: Dannals, Robert F.
name: Solnes, Lilja
name: Horti, Andrew G.
name: Pomper, Martin G.
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified

description: Additional file 1: Fig. S1. Representative views of the ten regions of interest.  Fig. S2. 11C-CPPC total distribution volume (VT) values across the human brain (N=8).
Stephanodes chestertoni
Creators: name: Huber, John T.
name: Read, Jennifer D.
name: Triapitsyn, Serguei V.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Stephanodes
Stephanodes chestertoni

description: Stephanodes chestertoni (Debauche, 1949)
 Polynema chestertoni Debauche, 1949: 67; holotype ♀ (RMCA), lost? TL: Belgian Congo, Albert [now Virunga] National Park, Mount Sesero near Bitashimwa, 2000 m. Heqvist, 1960: 431 (catalogue).
 Stephanodes chestertoni: Mathot, 1968: 275 (generic transfer); Huber & Fidalgo, 1997: 44 (types missing).
 Distribution. Democratic Republic of the Congo, Kenya [new record: Kakamega District, Isecheno Nature Reserve, Isecheno, 0.24°N 34.87°E, 1.vi.2001 – 20.i.2003, W. Okeka, R. Snelling, 12 ♀, 1 ♂, UCRC]).
description: Published as part of Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2021, Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Afrotropical region, pp. 1-166 in Zootaxa 5036 (1) on page 47, DOI: 10.11646/zootaxa.5036.1.1, http://zenodo.org/record/5502952
Predicting the UCS of Lime?Stabilized Clayey Soils
Creators: name: B. Sari-Ahmed, M. Ghrici
Publisher: name: Southeast Asian Geotechnical Society
Year: 2022
Subjects: Clayey soils
Lime
Unconfined compressive strength (UCS)
Curing time
Statistical model

description: The Geotechnical Engineering Journal of the SEAGS & AGSSEA, 53, 3, pp 22-30
Quantum Monte Carlo Simulation of the Trellis Lattice Heisenberg Model for SrCu$_2$O$_3$ and CaV$_2$O$_5$
Creators: name: Miyahara, Shin
name: Troyer, Matthias
name: Johnston, David C.
name: Ueda, Kazuo
Publisher: name: arXiv
Year: 1998
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the spin-1/2 trellis lattice Heisenberg model, a coupled spin ladder system, both by perturbation around the dimer limit and by quantum Monte Carlo simulations. We discuss the influence of the inter-ladder coupling on the spin gap and the dispersion, and present results for the temperature dependence of the uniform susceptibility. The latter was found to be parameterized well by a mean-field type scaling ansatz. Finally we discuss fits of experimental measurements on SrCu$_2$O$_3$ and CaV$_2$O$_5$ to our results.
description: 7 pages, 8 figures
Deterministic and Probabilistic Approach of Seismic Slope Stability Analysis A State-of-The-Art Review
Creators: name: Partha Pratim Boruah And Arunav Chakraborty
Publisher: name: Southeast Asian Geotechnical Society
Year: 2022
Subjects: Seismic analysis
Dynamic analysis
Factor of safety
Slope stability

description: The Geotechnical Engineering Journal of the SEAGS & AGSSEA, 53, 3, pp 31-38
Complete null data for a black hole collision
Creators: name: Husa, Sascha
name: Gomez, Roberto
name: Winicour, Jeffrey
Publisher: name: arXiv
Year: 2001
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss a sequence of numerically constructed geometries describing binary black hole event horizons -- providing the necessary input for characteristic evolution of the exterior spacetime. Our sequence approaches a single Schwarzschild horizon as one limiting case and also includes cases where the horizon's crossover surface is not hidden by a marginally anti-trapped surface (MATS).
description: 2 pages, uses World Scientific style file ws-p9-75x6-50.cls (enclosed), contribution to the 9th Marcel Grossmann meeting (MG9), Rome, July 2000
Atyphella brevis Lea Elytra 1909
Creators: name: Ballantyne, Lesley A.
name: Lambkin, Christine
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Lampyridae
Atyphella
Atyphella brevis

description: Atyphella brevis Lea, 1909 (Fig. 122) Atyphella brevis Lea, 1909:111; 1921a:197; 1929:345. Olivier, 1910b:46. Tillyard, 1926:212. Ballantyne In Calder, 1998:177 (comb. rev). Ballantyne & Lambkin, 2000:29; 2001:364, 2006:30. Luciola (Luciola) brevis (Lea). McDermott, 1966: 100. Lectotype. Male. AUSTRALIA: 17.16S, 145.29E, Atherton, designated by Ballantyne & Lambkin, 2000 (SAM). Diagnosis. One of six Australian species with striped elytra; Ballantyne & Lambkin (2000:29) distinguished brevis by a combination of characters including the convex–sided elytra, the poorly developed mouthparts and the acutely margined frons–vertex junction. Female, larva not associated.
description: Published as part of Ballantyne, Lesley A. & Lambkin, Christine, 2009, Systematics of Indo-Pacific fireflies with a redefinition of Australasian Atyphella Olliff, Madagascan Photuroluciola Pic, and description of seven new genera from the Luciolinae (Coleoptera: Lampyridae), pp. 1-188 in Zootaxa 1997 on page 43
description: {"references": ["Lea, A. M. (1909) Revision of the Australian and Tasmanian Malacodermidae. Transactions of the Entomological Society of London 1909, 45 - 251. [Lampyridae, 106 - 111].", "Lea, A. M. (1921 a) On Coleoptera, mostly from Queensland. Memoirs of the Queensland Museum 7, 182 - 240. (Lampyridae, 197 - 198).", "Lea, A. M. (1929) On Coleoptera, mostly from Queensland (Part 11). Memoirs of the Queensland Museum IX, 335 - 363 (Lampyridae, 344 - 345).", "Olivier, E., (1910 b). Pars 9. Lampyridae. Coleopterorum Catalogus (Junk-Schenkling). (Luciolinae, 40 - 48).", "Tillyard, R. J. (1926) The Insects of Australia and New Zealand. Angus and Robertson, Sydney.", "Calder, A. A. (1998) Coleoptera: Elateroidea. In: Wells, A. (ed.) Zoological Catalogue of Australia 29.6. (CSIRO Publishing: Melbourne).", "Ballantyne, L. A. & Lambkin, C. (2000) Lampyridae of Australia (Coleoptera: Lampyridae: Luciolinae: Luciolini). Memoirs of the Queensland Museum 46 (1), 15 - 93.", "McDermott, F. A. (1966) Lampyridae Pars. 9. Coleopterorum Catalogus (Junk-Schenkling) (Ed. Sec), 1 - 149 (Luciolini, 98 - 118)."]}
Additional file 4 of Comprehensive analysis of alternative polyadenylation regulators concerning CD276 and immune infiltration in bladder cancer
Creators: name: Xiong, Ming
name: Li, Wencheng
name: Wang, Longwang
name: Chen, Liang
name: Chen, Zhaohui
name: Wei, Chengcheng
name: Zhang, Futian
name: Chen, Jiawei
name: Kazobinka, Gallina
name: Zhao, Jun
name: Hou, Teng
Publisher: name: figshare
Year: 2022
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 4: Supplementary Table 3. The abbreviations of cancer types, alternative polyadenylation regulators and immune-related checkpoints in this study.
Coexistence of solitons and extreme events in deep water surface waves
Creators: name: Cazaubiel, A
name: Michel, G.
name: Lepot, S
name: Semin, B
name: Aumaître, S
name: Berhanu, M
name: Bonnefoy, Félicien
name: Falcon, Eric
Publisher: name: arXiv
Year: 2018
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Chaotic Dynamics (nlin.CD)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We study experimentally, in a large-scale basin, the propagation of unidirectional deep water gravity waves stochastically modulated in phase. We observe the emergence of nonlinear localized structures that evolve on a stochastic wave background. Such a coexistence is expected by the integrable turbulence theory for the nonlinear Schr{ö}dinger equation (NLSE), and we report the first experimental observation in the context of hydrodynamic waves. We characterize the formation, the properties and the dynamics of these nonlinear coherent structures (solitons and extreme events) within the incoherent wave background. The extreme events result from the strong steepening of wave train fronts, and their emergence occurs after roughly one nonlinear length scale of propagation (estimated from NLSE). Solitons arise when nonlinearity and dispersion are weak, and of the same order of magnitude as expected from NLSE. We characterize the statistical properties of this state. The number of solitons and extreme events is found to increase all along the propagation, the wave-field distribution has a heavy tail, and the surface elevation spectrum is found to scale as a frequency power-law with an exponent --4.5 $\pm$ 0.5. Most of these observations are compatible with the integrable turbulence theory for NLSE although some deviations (e.g. power-law spectrum, asymmetrical extreme events) result from effects proper to hydrodynamic waves.
Observation of the Decay $D_{s}^{+}\to ωπ^{+}$
Creators: name: CLEO Collaboration
name: al, R. Balest et
Publisher: name: arXiv
Year: 1997
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Using e+e- annihilation data collected by the CLEO~II detector at CESR, we have observed the decay Ds+ to omega pi+. This final state may be produced through the annihilation decay of the Ds+, or through final state interactions. We find a branching ratio of [Gamma(Ds+ to omega pi+)/Gamma(Ds+ to eta pi+)]=0.16+-0.04+-0.03, where the first error is statistical and the second is systematic.
description: 9 pages, postscript file also available through http://w4.lns.cornell.edu/public/CLNS
Additional file 5 of Comprehensive analysis of alternative polyadenylation regulators concerning CD276 and immune infiltration in bladder cancer
Creators: name: Xiong, Ming
name: Li, Wencheng
name: Wang, Longwang
name: Chen, Liang
name: Chen, Zhaohui
name: Wei, Chengcheng
name: Zhang, Futian
name: Chen, Jiawei
name: Kazobinka, Gallina
name: Zhao, Jun
name: Hou, Teng
Publisher: name: figshare
Year: 2022
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 5: Supplementary Table 4. The patients’ clinical information (n = 16) in this study.
D2.1: WP2 Discharge models and swarm data v1 released
Creators: name: Marskar, Robert
name: Vemulapalli, Hanut
name: Akbaş, Mücahit
name: Franck, Christian
Publisher: name: Zenodo
Year: 2024

description: This report describes the deliverable D2.1 – WP2 Discharge models and swarm data v1 released from the EU MISSION project. As the deliverable D2.1 consists of open-source software releases, this report primarily includes a brief discussion of the background of the software and data sets that have been published. Instructions for how to access the various computer codes and data sets are available in this report.
Atyphella conspicua Ballantyne 2000
Creators: name: Ballantyne, Lesley A.
name: Lambkin, Christine
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Lampyridae
Atyphella
Atyphella conspicua

description: Atyphella conspicua Ballantyne, 2000 Atyphella conspicua Ballantyne in Ballantyne & Lambkin, 2000:30; 2001:364, 2006:30. Holotype. Male. AUSTRALIA: 16.42 S, 145.13 E, Stewart Creek (QMT61017). Diagnosis. Males with brown elytra and pale pronotum with medial dark marking, distinguished from A. inconspicua by the divergent lateral margins of the pronotum, and the median elevation of the acute frons-vertex junction (Ballantyne & Lambkin 2000 Fig.2f); brachelytral females with vestigial hind wings are tentatively associated.
description: Published as part of Ballantyne, Lesley A. & Lambkin, Christine, 2009, Systematics of Indo-Pacific fireflies with a redefinition of Australasian Atyphella Olliff, Madagascan Photuroluciola Pic, and description of seven new genera from the Luciolinae (Coleoptera: Lampyridae), pp. 1-188 in Zootaxa 1997 on page 43
description: {"references": ["Ballantyne, L. A. & Lambkin, C. (2000) Lampyridae of Australia (Coleoptera: Lampyridae: Luciolinae: Luciolini). Memoirs of the Queensland Museum 46 (1), 15 - 93."]}
Spectroscopic and astrometric radial velocities: Hyades as a benchmark
Creators: name: Leão, I. C.
name: Pasquini, L.
name: Ludwig, H. -G.
name: de Medeiros, J. R.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We study the accuracy of spectroscopic RVs by comparing spectroscopic and astrometric RVs for stars of the Hyades open cluster. Rather accurate astrometric RVs are available for the Hyades' stars, based on Hipparcos and on the first Gaia data release. We obtained HARPS spectra for a large sample of Hyades stars, and homogeneously analysed them. After cleaning the sample from binaries, RV variables, and outliers, 71 stars remained. The distribution of the observed RV difference (spectroscopic -- astrometric) is skewed and depends on the star right ascension. This is consistent with the Hyades cluster rotating at 42.3 +/- 10 m/s/pc. The two Hyades giants in the sample show, as predicted by gravitational redshift (GR), a spectroscopic RV that is blue-shifted with respect to the dwarfs, and the empirical GR slope is of 626 +/- 131 m/s, in agreement with the theoretical prediction. The difference between spectroscopic and astrometric RVs is very close to zero, within the uncertainties. In particular, the mean difference is of -33 m/s and the median is of -16 m/s when considering the Gaia-based RVs (corrected for cluster rotation), with a sigma of 347 m/s, very close to the expected cluster velocity dispersion. We also determine a new value of the cluster centroid spectroscopic RV: 39.36 +/- 0.26 km/s. The spectroscopic RV measurements are expected, from simulations, to depend on stellar rotation, but our data do not confirm these predictions. We finally discuss other phenomena that can influence the RV difference, such as cluster expansion, stellar activity, general relativity, and Galactic potential. Clusters within the reach of current telescopes are expected to show differences of several hundreds m/s, depending on their position in the Galaxy.
description: 18 pages, 9 figures, accepted for publication in MNRAS
Trapped Bose-condensate in gravity field
Creators: name: Baranov, D. B.
name: Yarunin, V. S.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The 1D and 2D Bose-condensation of trapped atoms in a gravitational field are considered. The deformation of the finite parabolic potential in this field is modeling via the combination of two rectangular 1D and 2D traps, for which the cut-off and the re-definition of spectrum are taken into account. A Bose-condensation T_c shift by the gravity is calculated. A sign and a magnitude of it in a deformed trap depends on the order of including the gravitational field. The special choice of this order may describe three consistent Bose-condensations with different temperatures. These transitions may be associated with a transportation of a trap on the cycle (I) Earth-(II) Space-(III) Earth.
description: 8 pages, LaTex, submitted to Pisma v JETP
More-Than-Human Eating.
Creators: name: Niewöhner, Jörg
name: Biedermann, Sabine
name: Heitger, Anna
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: More-than-Human
subject: Eating Body
subject: Microbiome
subject: Anticipation
subject: Food Security
subject: Ernährungssicherheit
subject: Antizipation
subject: Mikrobiom
subject: 301 Soziologie, Anthropologie

description: This paper is concerned with emergent more-than-human eating practices and how they might challenge received understandings of bio- and geopolitics.After a brief review of the anthropology of food and eating and how its concerns may have to be expanded in the Anthropocene, we briefly analyse three empirical cases of anticipatory more-than-human eating practices: a set of artistic anticipations of future eating; microbiome research and related biohacking practices; and research on future food security in the context of planetary boundaries. We discuss how all three cases make the boundaries between body|mind|environment porous. The ‘I’ of the embodied human subject emerges as multiple – colonised and accompanied by a panoply of microorganisms. How might such a collective be subject to governance and ‘self’-technologies? We close by pleading for an experimental para-sitic anthropology that critically addresses emergent forms of bio/geopolitics in the Anthropocene.
description: In diesem Artikel befassen wir uns mit more-than-human Praktiken des Essens und inwiefern diese unser gegenwärtiges Verständnis von Bio- und Geopolitik in Frage stellen. Wir beginnen mit einem komprimierten Überblick über anthropologische Perspektiven auf Essen und Ernährung und diskutieren mögliche notwendige Erweiterungen der Anliegen dieser in der gegenwärtigen Epoche des Anthropozän. Im Anschluss stellen wir unsere Analyse drei empirischer Fallstudien von antizipativen more-than-human Praktiken des Essens dar: ein Set von künstlerischen Antizipationen von Essen der Zukunft; Mikrobiom-Forschung und damit verknüpfte Praktiken des Biohacking; und zuletzt einen Forschungskomplex zur deutschen Ernährungssicherheit im Kontext von planetarischen Belastungsgrenzen. Die Art und Weise, wie die Grenzen von Körper|Geist|Umwelt in diesen drei Fällen porös gemacht werden, steht im Fokus unserer Analyse. Das Ich des verkörperten menschlichen Subjekts, so wird deutlich, tritt als multipel hervor – kolonisiert und begleitet von einer Vielfalt von Mikroorganismen. Wie könnte ein solches Kollektiv zum Subjekt von Governance und von Technologien des Selbst werden? Wir schließen mit einem Plädoyer für eine experimentelle para-sitische Anthropologie, die eine kritische Auseinandersetzung mit entstehenden Formen von Bio- und Geopolitik im Anthropozän ermöglicht.
Additional file of Is human blood a good surrogate for brain tissue in transcriptional studies?
Creators: name: Cai, Chaochao
name: Langfelder, Peter
name: Fuller, Tova F
name: Oldham, Michael C
name: Luo, Rui
name: van den Berg, Leonard H
name: Ophoff, Roel A
name: Horvath, Steve
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file of Is human blood a good surrogate for brain tissue in transcriptional studies?
Statistical Distribution of Intensities Reflected from Disordered Media
Creators: name: Garcia-Martin, A.
name: Lopez-Ciudad, T.
name: Saenz, J. J.
name: Nieto-Vesperinas, M.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: A theoretical analysis of the statistical distributions of the reflected intensities from random media is presented. We use random matrix theory to analytically deduce the probability densities in the localization regime. Numerical calculations of the coupling to backward modes in surface corrugated waveguides are also put forward for comparison. Interestingly, the speckle distributions are found to be independent of the transport regime. Despite the scattering being highly non-isotropic, the predicted probability densities reproduce accurately the numerical results.
description: 4 pages, Revtex, 4 PS figures
Square functions for noncommutative differentially subordinate martingales
Creators: name: Jiao, Yong
name: Randrianantoanina, Narcisse
name: Wu, Lian
name: Zhu, Dejian
Publisher: name: arXiv
Year: 2019
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 46L53

description: We prove inequalities involving noncommutative differentially subordinate martingales. More precisely, we prove that if $x$ is a self-adjoint noncommutative martingale and $y$ is weakly differentially subordinate to $x$ then $y$ admits a decomposition $dy=a +b +c$ (resp. $dy=z +w$) where $a$, $b$, and $c$ are adapted sequences (resp. $z$ and $w$ are martingale difference sequences) such that: $$ \Big\| (a_n)_{n\geq 1}\Big\|_{L_{1,\infty}({\mathcal M}\overline{\otimes}\ell_\infty)} +\Big\| \Big(\sum_{n\geq 1} \mathcal{E}_{n-1}|b_n|^2 \Big)^{{1}/{2}}\Big\|_{1, \infty} + \Big\| \Big(\sum_{n\geq 1} \mathcal{E}_{n-1}|c_n^*|^2 \Big)^{{1}/{2}}\Big\|_{1, \infty} \leq C\big\| x \big\|_1 $$ (resp. $$ \Big\| \Big(\sum_{n\geq1} |z_n|^2 \Big)^{{1}/{2}}\Big\|_{1, \infty} + \Big\| \Big(\sum_{n\geq 1} |w_n^*|^2 \Big)^{{1}/{2}}\Big\|_{1, \infty} \leq C\big\| x \big\|_1). $$ We also prove strong-type $(p,p)$ versions of the above weak-type results for $1
EMOTSIONAL SHOK VA VITILIGO BOSHLANISHI
Creators: name: Abdujabborova, Sitora
name: Kuchkarov, Humoyun
name: Umarov, Jasur
Publisher: name: Zenodo
Year: 2025

description: Mazkur tezisda emotsional shok va vitiligo boshlanishi o‘rtasidagi bog‘liqlik ilmiy asosda tahlil qilinadi, shuningdek, stressni boshqarish usullari va psixologik qo‘llab-quvvatlashning ahamiyati yoritiladi. Tadqiqot natijalari shuni ko‘rsatadiki, psixologik omillar vitiligoni keltirib chiqaruvchi asosiy omillardan biri bo‘lib, bemorlarning ruhiy holatini yaxshilash ushbu kasallikning rivojlanish jarayonini sekinlashtirishga yordam berishi mumkin.
SHAHRISABZ TURIZMI: TARIXIY MEROS, EKOTURIZM SALOHIYATI VA ZAMONAVIY RIVOJLANISH YO'LLARI
Creators: name: Nazarov, Kamol
name: G'aniyev, Anvar
Publisher: name: Zenodo
Year: 2025

description: Mazkur maqolada Shahrisabz shahrining turizm salohiyati kompleks yondashuv asosida tahlil etilgan. Tarixiy-madaniy meros, tabiiy-geografik xususiyatlar, zamonaviy turistik infratuzilma va xalqaro tajribalar asosida Shahrisabz turizmini rivojlantirish istiqbollari o‘rganilgan. Mavjud muammolar va ularni bartaraf etish bo‘yicha taklif va tavsiyalar ishlab chiqilgan. Tadqiqot natijalari Shahrisabz shahrining mintaqaviy va xalqaro turizm bozoridagi o‘rnini mustahkamlash imkoniyatlarini ko‘rsatadi.
Diffusion in disordered systems under iterative measurement
Creators: name: Flores, J. C.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We consider a sequence of idealized measurements of time-separation $Δt$ onto a discrete one-dimensional disordered system. A connection with Markov chains is found. For a rapid sequence of measurements, a diffusive regime occurs and the diffusion coefficient $D$ is analytically calculated. In a general point of view, this result suggests the possibility to break the Anderson localization due to decoherence effects. Quantum Zeno effect emerges because the diffusion coefficient $D$ vanishes at the limit $Δt \to 0$.
description: 8 pages, 0 figures, LATEX. accepted in Phys.Rev.B