cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
ЗНАЧИМОСТЬ ИССЛЕДОВАНИЯ ПЕРЕКЛЮЧЕНИЯ КОДА В УЗБЕКИСТАНЕ
Creators: name: Муродова, Назира
Publisher: name: Zenodo
Year: 2024

description: Статья посвящена исследованию переключения кода в Узбекистане, рассматривая его значимость в контексте многоязычия, культурной идентичности и социальной динамики. В работе анализируются основные причины и контексты, способствующие переключению кода между узбекским и русским языками. Автор подчеркивает, что переключение кода не только отражает лингвистические особенности, но и служит важным инструментом для выражения социальной принадлежности и культурных аспектов. Также рассматриваются образовательные и языковые политики, направленные на поддержку многоязычного общения. В заключении подчеркивается необходимость дальнейших исследований для глубокого понимания влияния переключения кода на коммуникацию и идентичность в Узбекистане.
A DYNAMIC ANALYSIS OF THE IMPACT OF WATER QUALITY POLICIES ON IRRIGATION INVESTMENT AND CROP CHOICE DECISIONS
Creators: name: Wu, JunJie
name: Mapp, Harry P.
name: Bernardo, Daniel J.
name: Wu, JunJie
name: Mapp, Harry P.
name: Bernardo, Daniel J.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Crop Production/Industries
subject: Crop selection
subject: Dynamic optimization
subject: Irrigation investment
subject: Water quality

description: A dynamic model is developed to analyze farmers' irrigation investment and crop choice decisions under alternative water quality protection policies. The model is applied to an empirical example in the Oklahoma High Plains. The choices of crops and irrigation systems and the resulting levels of irrigation, income, and nitrogen runoff and percolation are simulated over a ten-year period. An effluent tax on nitrogen runoff and percolation is shown to be effective in reducing nitrate pollution. The efficacy of cost sharing in adopting modern irrigation technologies and restrictions on irrigation water use depends on soil type. A tax on nitrogen use is shown to be the least effective policy.
Cosmic Structure Formation at Low and High Redshifts
Creators: name: Yoshida, Naoki
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The currently standard theory of cosmic structure formation posits that the present-day clumpy appearance of the universe developed through gravitational amplification of the matter density fluctuations that are generated in the very early universe. The energy content of the univese and the basic statistics of the initial density field have been determined with a reasonable accuracy from recent observations of the cosmic microwave background, large-scale structure, and distant supernovae. It has become possible to make accurate predictions from the standard model. We review the latest observations and the recent progress in the theory of structure formation at low and high redshifts. Two promising methods to probe large-scale matter distribution are introduced and the future prospects are discussed. Results from state-of-the-art cosmological simulations are also presented.
description: Published in Progress of Theoretical Physics Supplement. Invited talk at 19th Nishinomiya-Yukawa symposium. 27 pages, 18 figures embedded
Static dielectric response of icosahedral fullerenes from C60 to C2160 by an all electron density functional theory
Creators: name: Zope, Rajendra R.
name: Baruah, Tunna
name: Pederson, Mark R.
name: Dunlap, B. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: The static dielectric response of C60, C180, C240, C540, C720, C960, C1500, and C2160 fullerenes is characterized by an all-electron density-functional method. First, the screened polarizabilities of C60, C180, C240, and C540, are determined by the finite-field method using Gaussian basis set containing 35 basis functions per atom. In the second set of calculations, the unscreened polarizabilities are calculated for fullerenes C60 through C2160 from the self-consistent Kohn-Sham orbitals and eigen-values using the sum-over-states method. The approximate screened polarizabilities, obtained by applying a correction determined within linear response theory show excellent agreement with the finite-field polarizabilities. The static dipole polarizability per atom in C2160 is (4 Angstrom^3) three times larger than that in C60 (1.344 Angstrom^3). Our results reduce the uncertainty in various theoretical models used previously to describe the dielectric response of fullerenes and show that quantum size effects in polarizability are significantly smaller than previously thought.
description: RevTex, 3 figures
Choquet operators associated to vector capacities
Creators: name: Gal, Sorin G.
name: Niculescu, Constantin P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47H07, 28B15, 28C15, 46B42, 46G10

description: The integral representation of Choquet operators defined on a space C(X) is established by using the Choquet-Bochner integral of a real-valued function with respect to a vector capacity.
description: 23 pages
Thermal background can solve the cosmological moduli problem
Creators: name: Yokoyama, Jun'ichi
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is shown that the coherent field oscillation of moduli fields with weak or TeV scale masses can dissipate its energy efficiently if they have a derivative coupling to standard bosonic fields in a thermal state. This mechanism may provide a new solution to the cosmological moduli problem in some special situations.
description: 4 pages. revised version
Implementation of the Process-Genre Approach in an English as a Foreign Language Classroom in Thailand:  A Case Study
Creators: name: Kantana Rayupsri
name: Saowadee Kongpetch
Publisher: name: Rangsit University, Pathum Thani, Thailand
Year: 2014
Subjects: Genre-based approach,Recount,generic structure,and language features

description: 2, 1, RANGSIT JOURNAL OF EDUCATIONAL STUDIES
EFFECT OF RISK AVERSION ON FEEDER CATTLE PRICES
Creators: name: Lee, Jung-Hee
name: Brorsen, B. Wade
name: Lee, Jung-Hee
name: Brorsen, B. Wade
Publisher: name: Unknown
Year: 1994
Subjects: subject: Demand and Price Analysis
subject: Livestock Production/Industries
subject: Feedlot pen data
subject: Price expectations
subject: Hedonic price
subject: Price risk
subject: Risk aversion

description: This paper determines the effects of cattle feeders' risk aversion on feeder cattle prices using pen data of Kansas feedlots. Higher profit risk results in lower feeder cattle prices. The elasticity of feeder cattle price with respect to profit risk was small (-0.013). The risk elasticity estimated here is similar to risk elasticities in previous studies and thus, the use of pen-level data does not seem to add much to the study of risk.
FUNDAMENTALS OF TRAINING CHILDREN TO OBOY PERFORMANCE IN MUSIC AND ART SCHOOLS
Creators: name: Toshtemirova, Mukaddaskhon
Publisher: name: Zenodo
Year: 2024

description: There are several rules for teaching oboe to students. The sound-generating device of the oboe: the sound-generating process of the oboe and its relatives is produced by the vibration of the reeds as a result of the strong air pressure passing through the reeds, i.e. the trost. Air passing through two pieces of reeds mounted on the metal base of the device is passed to the oboe's mouthpiece, creating a hissing sound. This chirping is controlled by the performer's fingers with the help of the valve mechanism of the instrument, the duration and timbre of the sound with a certain quality and strength, vibrating the air column (air column) in the internal channel (mensura) of the oboe.
Calibration of nuclear recoils at the 100 eV scale using neutron capture
Creators: name: Thulliez, L.
name: Lhuillier, D.
name: Cappella, F.
name: Casali, N.
name: Cerulli, R.
name: Chalil, A.
name: Chebboubi, A.
name: Dumonteil, E.
name: Erhart, A.
name: Giuliani, A.
name: Gunsing, F.
name: Jericha, E.
name: Kaznacheeva, M.
name: Kinast, A.
name: Langenkämper, A.
name: Lasserre, T.
name: Letourneau, A.
name: Litaize, O.
name: de Marcillac, P.
name: Marnieros, S.
name: Materna, T.
name: Mauri, B.
name: Mazzucato, E.
name: Nones, C.
name: Ortmann, T.
name: Pattavina, L.
name: Poda, D. V.
name: Rogly, R.
name: Schermer, N.
name: Serot, O.
name: Soum, G.
name: Stodolsky, L.
name: Strauss, R.
name: Vignati, M.
name: Vivier, M.
name: Wagner, V.
name: Wex, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The development of low-threshold detectors for the study of coherent elastic neutrino-nucleus scattering and for the search for light dark matter necessitates methods of low-energy calibration. We suggest this can be provided by the nuclear recoils resulting from the $γ$ emission following thermal neutron capture. In particular, several MeV-scale single-$γ$ transitions induce well-defined nuclear recoil peaks in the 100 eV range. Using the FIFRELIN code, complete schemes of $γ$-cascades for various isotopes can be predicted with high accuracy to determine the continuous background of nuclear recoils below the calibration peaks. We present a comprehensive experimental concept for the calibration of CaWO$_4$ and Ge cryogenic detectors at a research reactor. For CaWO$_4$ the simulations show that two nuclear recoil peaks at 112.5 eV and 160.3 eV should be visible above background simply in the spectrum of the cryogenic detector. Then we discuss how the additional tagging for the associated $γ$ increases the sensitivity of the method and extends its application to a wider energy range and to Ge cryogenic detectors.
description: 21 pages, 8 figures
A statistical formalism of Causal Dynamical Triangulations
Creators: name: Ansari, Mohammad H.
name: Markopoulou, Fotini
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We rewrite the 1+1 Causal Dynamical Triangulations model as a spin system and thus provide a new method of solution of the model.
description: 21 pages, 19 pictures, 1 graph, Published in section: Field Theory And Statistical Systems
Contextual Guessing Strategy Instruction and Students' Mastery on Phrasal Verbs (A Quasi-Experimental Study of a State Vocational School in Tasikmalaya)
Creators: name: Wiena Novianti
Publisher: name: Rangsit University, Pathum Thani, Thailand
Year: 2014
Subjects: Phrasal verbs,Contextual Guessing Strategy Instruction.

description: 2, 1, RANGSIT JOURNAL OF EDUCATIONAL STUDIES
"Vent-For- Surplus" as a Source of Agricultural Growth in Northeast Thailand, 1950-1986
Creators: name: Fuglie, Keith O.
name: Fuglie, Keith O.
Publisher: name: Unknown
Year: 1989
Subjects: International Development

description: This paper reviews the "vent-for-surplus" model of agricultural development, in which access to foreign markets allows "surplus productive capacity" to be exploited. The "indirect effects" of trade contribute to long-term economic growth even after the direct gains from trade are realized. How the new income streams are distributed amongst the population may also carry implications for long-term growth prospects. The model is used to explain the rapid expansion in export crop production that has taken place in the Northeast Region of Thailand over the past twenty-five years. It is shown that the growth in export production was achieved at very little expense to the subsistence sector by employing previously underutilized land and labor resources. Growth indices are constructed to quantify the contribution of "vent-for-surplus" to the growth in agricultural product. Institutional factors play a major role in realizing growth potential. The major demand-side impetus for Thai cassava production came from agricultural policy adjustments in the European Economic Community. Thai policies on trade and foreign investment encouraged foreign and domestic entrepreneurs to invest in marketing and processing improvements. The private sector also played a leading role in extending production technology to the farm level. The public sector played a substantial role in improving transportation services. Future growth will probably require a larger role for the public sector, particularly in agricultural research and human capital development.
Berry-phase induced entanglement of hole-spin qubits in a microwave cavity
Creators: name: Wysokiński, Marcin M.
name: Płodzień, Marcin
name: Trif, Mircea
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Hole-spins localized in semiconductor structures, such as quantum dots or defects, serve to the realization of efficient gate-tunable solid-state quantum bits. Here we study two electrically driven spin $3/2$ holes coupled to the electromagnetic field of a microwave cavity. We show that the interplay between the non-Abelian Berry phases generated by local time-dependent electrical fields and the shared cavity photons allows for fast manipulation, detection, and long-range entanglement of the hole-spin qubits in the absence of any external magnetic field. Owing to its geometrical structure, such a scheme is more robust against external noises than the conventional hole-spin qubit implementations. These results suggest that hole-spins are favorable qubits for scalable quantum computing by purely electrical means.
description: 4p + 9p of supplemental material
Supersymmetric completion of M-theory 4D-gauge algebra from twisted tori and fluxes
Creators: name: D'Auria, Riccardo
name: Ferrara, Sergio
name: Trigiante, Mario
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present the supersymmetric completion of the M-theory free differential algebra resulting from a compactification to four dimensions on a twisted seven-torus with 4-form and 7-form fluxes turned on. The super--curvatures are given and the local supersymmetry transformations derived. Dual formulations of the theory are discussed in connection with classes of gaugings corresponding to diverse choices of vacua. This also includes seven dimensional compactifications on more general spaces not described by group manifolds.
description: 19 pages, LaTeX, typos corrected, references added
Inflating with the QCD Axion
Creators: name: Freese, Katherine
name: Liu, James T.
name: Spolyar, Douglas
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that the QCD axion can drive inflation via a series of tunneling events. For axion models with a softly broken $Z_N$ symmetry, the axion potential has a series of $N$ local minima and may be modeled by a tilted cosine. Chain inflation results along this tilted cosine: the field tunnels from an initial minimum near the top of the potential through a series of ever lower minima to the bottom. This results in sufficient inflation and reheating. QCD axions, potentially detectable in current searches, may thus simultaneously solve problems in particle physics and provide inflation.
description: 5 pages, 1 figure, revised for submission to PRL
Cimolodon Marsh 1889
Creators: name: Sahni, Ashok
Publisher: name: Zenodo
Year: 1972
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Multituberculata
Cimolodontidae
Cimolodon

description: CIMOLODON MARSH, 1889b
Cimolodon MARSH, 1889b, p. 84.
Cimolodon: CLEMENS, 1963b, p. 56.
description: Published as part of Sahni, Ashok, 1972, The vertebrate Fauna of the Judith River formation, Montana, pp. 319-416 in Bulletin of the American Museum of Natural History 147 (6) on page 376, DOI: 10.5281/zenodo.3382461
Nonsymmetric Macdonald Superpolynomials
Creators: name: Dunkl, Charles F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Representation Theory (math.RT)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 33D56, 20C08, 05E05

description: There are representations of the type-A Hecke algebra on spaces of polynomials in anti-commuting variables. Luque and the author [Sém. Lothar. Combin. 66 (2012), Art. B66b, 68 pages, arXiv:1106.0875] constructed nonsymmetric Macdonald polynomials taking values in arbitrary modules of the Hecke algebra. In this paper the two ideas are combined to define and study nonsymmetric Macdonald polynomials taking values in the aforementioned anti-commuting polynomials, in other words, superpolynomials. The modules, their orthogonal bases and their properties are first derived. In terms of the standard Young tableau approach to representations these modules correspond to hook tableaux. The details of the Dunkl-Luque theory and the particular application are presented. There is an inner product on the polynomials for which the Macdonald polynomials are mutually orthogonal. The squared norms for this product are determined. By using techniques of Baker and Forrester [Ann. Comb. 3 (1999), 159-170, arXiv:q-alg/9707001] symmetric Macdonald polynomials are built up from the nonsymmetric theory. Here "symmetric" means in the Hecke algebra sense, not in the classical group sense. There is a concise formula for the squared norm of the minimal symmetric polynomial, and some formulas for anti-symmetric polynomials. For both symmetric and anti-symmetric polynomials there is a factorization when the polynomials are evaluated at special points.
Secondary metabolites from Taxus X media plant cell culture
Creators: name: MarkovicÌ, Aleksandra
Publisher: name: University of British Columbia
Year: 2009

description: Taxol (1) is a novel anti-cancer agent isolated from the Pacific Yew Taxus species. Effective activity against breast and ovarian cancer has been clinically proven, and led to Taxol being approved for marketing (Bristol-Myers Squibb Company) in 1992. However, Taxol's utility was limited not by safety or efficacy but by the lack of sufficient supplies of the therapeutic agent. Pacific Yew trees are scarce; to obtain only one gram of Taxol approximately 3-6 trees need to be harvested. Hence the intensive search for alternative methods to massproduce this precious anti-cancer agent. The main goal of my research was to examine the plant cell culture of Taxus x media for the production of secondary metabolites, especially for the production of Taxol and its simpler analogs that can, by semisynthetic routes be converted to Taxol. This thesis is based on two different types of experiments with the same culture: 1. Microferm experiments, where the culture was grown in bioreactors with mechanical stirring, and 2. Shake flask experiments, where the culture was grown in flasks placed on a rotary shaker. After extensive separation procedure, the secondary metabolites were isolated from the culture, and on the basis of spectroscopic data, the following structures could be assigned. Compounds 36 and 38 were isolated from the culture grown in the Microferm bioreactor. The culture grown in shake flasks produced compounds 36, 38, 39 and 40. It was found that the Taxus x media plant cell culture was not producing taxanes at levels measurable by our techniques. However, the culture was found to be stable and to give reproducible results in terms of metabolite production. We believe that further experiments with a combination of strategies, including nutrient and osmotic manipulations, gas composition effects, and elicitor treatments, to mention a few, would eventually lead to a Taxol and taxane producing cell line.
Interplay among the azimuthally dependent HBT radii and the elliptic flow
Creators: name: Csanad, Mate
name: Tomasik, Boris
name: Csorgo, Tamas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a calculation of the elliptic flow and azimuthal dependence of the correlation radii in the ellipsoidally symmetric generalization of the Buda-Lund model. The elliptic flow is shown to depend only on the flow anisotropy while in case of correlation radii both flow and space anisotropy play an important role in determining their azimuthal oscillation. We also outline a simple procedure for determining the parameters of the model from data.
description: 7 pages, 4 figures, prepared with svjour.cls, accepted at Eur. Phys. J. A
Import Elasticity with Government Intervention: A Time Series Cross Section Analysis of Seventy-Two Countries
Creators: name: Roe, Terry L.
name: Shane, Mathew
name: Vo, De Huu
name: Roe, Terry L.
name: Shane, Mathew
name: Vo, De Huu
Publisher: name: Unknown
Year: 1986
Subjects: International Relations/Trade

description: The impact of government intervention on the behavior of a country's import market is investigated by focusing on the departure this intervention induces between excess and import demand functions. A formal model of government behavior is posited where government preferences are embodied in a country's import demand function. This function is related to its corresponding excess demand function through the domestic price to border price transmission elasticity. A pooled cross section data on 72 countries is used to estimate these function for wheat and rice. The results suggest that import demand elasticities are larger than their corresponding excess demand elasticities and that price transmission elasticities are less than unity. Differences in elasticities over time, regions and levels of nominal protection are also reported.
Observing the suppression of superconductivity in RbEuFe$_4$As$_4$ by correlated magnetic fluctuations
Creators: name: Collomb, D.
name: Bending, S. J.
name: Koshelev, A. E.
name: Smylie, M. P.
name: Farrar, L.
name: Bao, J. -K.
name: Chung, D. Y.
name: Kanatzidis, M. G.
name: Kwok, W. -K.
name: Welp, U.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In this letter, we describe quantitative magnetic imaging of superconducting vortices in RbEuFe$_4$As$_4$ in order to investigate the unique interplay between the magnetic and superconducting sublattices. Our scanning Hall microscopy data reveal a pronounced suppression of the superfluid density near the magnetic ordering temperature in good qualitative agreement with a recently-developed model describing the suppression of superconductivity by correlated magnetic fluctuations. These results indicate a pronounced exchange interaction between the superconducting and magnetic subsystems in RbEuFe\textsubscript{4}As\textsubscript{4} with important implications for future investigations of physical phenomena arising from the interplay between them.
Blindzonenfreie Ultraschall-Abstandsmessung in Luft
Creators: name: Quellmalz, Andreas
Publisher: name: Universität Paderborn
Year: 2020

description: Luft-Ultraschall-Abstandssensoren sind in der Regel mit nur einem Schallwandler aufgebaut.Dadurch verringert sich der konstruktive Aufwand und die aktive Fläche für dasSenden und Empfangen ist maximiert. Während des Sendens und des Ausschwingenskann mit dem Schallwandler im Allgemeinen kein Empfangssignal detektiert werden.Dadurch entsteht eine Blindzone, die zu einem Mindestabstand für die Abstandsmessungführt. Diese Blindzone ist direkt von der Sendesignallänge abhängig. Daher können in derRegel nur kurze Sendesignale verwendet werden. Codierte Sendesignale, mit denen sichverschiedene Sensoren unterscheiden lassen und ein Übersprechen verhindert werdenkann, was zu Fehlmessungen führen würde, scheiden daher meist aus.Im Rahmen dieser Arbeit wurde ein Messverfahren entwickelt, das auf einer modellbasiertenSende-/Empfangssignal-Trennung basiert. Dadurch lässt sich der Mindestabstanderheblich reduzieren. Abhängig von den verwendeten Schallwandlern ist damit sogareine Messung bis zum Abstand null realisierbar. Das Verfahren basiert auf einer Online-Modellparameteridentifikation für ein Modell, welches das elektrische Verhalten desSchallwandlers beim Betrieb über einen Vorwiderstand beschreibt. Dazu werden dasGenerator- und das Schallwandlersignal digitalisiert. Anschließend ist es möglich, daselektrische Empfangssignal zu schätzen.Das Verfahren wird mit mehreren Schallwandlern untersucht. Dabei werden für dasMessverfahren notwendige Parameter des Schallwandlers ermittelt.Weitere Bestandteileder durchgeführten Untersuchungen sind die Wahl einer geeigneten Codierung und einergeeigneten Modulation für die verwendeten Sendesignale.
description: Most industrial air ultrasonic distance sensors are based on a single transducer. Such aconstruction is simplified and the transducer area used for transmitting and receivingis maximized. Within this setup an electrical received signal cannot be detected duringtransmitting. This leads to a minimum distance for distance measurement called blindzone.It depends on the length of the transmitted signal. This prevents usage of long, codedsignals which could be used to reduce crosstalk in a multi sensor environment.In this work a new measuring method realizing a simultaneous transmit and receiveoperation is developed. Thereby the blindzone can be reduced significantly. Depending onthe used transducer a blindzone free measurement can be realized. The method is based onan online parameter identification of the electrical system, comprising the transducer and aseries resistor. Therefore the generator signal and the electrical received signal are digitized.The developed digital signal processing algorithm estimates the electrical received signal.During this work the measuring method is evaluated with different transducers. Therebynecessary transducer parameters important for the method are determined. Another partof the work is the evaluation of different transmitting signals and modulation methods.
The Selectivity of Fertility and the Determinants of Human Capital Investments: Parametric and Semi-Parametric Estimates
Creators: name: Pitt, Mark M.
name: Rosenzweig, Mark R.
name: Pitt, Mark M.
name: Rosenzweig, Mark R.
Publisher: name: Unknown
Year: 1989
Subjects: Labor and Human Capital

description: In this paper we assess the importance of heterogeneity and selective fertility in altering estimates and interpretations of the determinants of the human capital of children. We set out a sequential model of human capital investments in children incorporating endogenous fertility and heterogeneity in human capital endowments to illustrate the fertility selection problem and issues of identification. Empirical results based on parametric and semi-parametric estimates of selectivity models applied to data on birthweight and schooling in Malaysia indicate that the hypothesis of no fertility selection is strongly rejected, with mothers having higher birthweight children tending to have substantially lower birth probabilities (negative birth selectivity). As a consequence, the positive association between mother's schooling and birthweight is substantially underestimated and the positive effects of delaying childbearing overestimated when birth selectivity is not taken into account. The schooling results indicate strong rejection of the "efficient schooling" model, in which schooling is allocated efficiently across children, but only when the selectivity of fertility is taken into account.
Soft gluon emission at large angles
Creators: name: Marchesini, Giuseppe
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I review recent results on soft gluon radiation at large angles
description: Contribution to ``Gribov-75'', Memorial workshop on quarks, hadrons, and strong interactions, May 22-24, 2005 Budapest, Hungary
Galactic Centre stellar winds and Sgr A* accretion
Creators: name: Cuadra, J.
name: Nayakshin, S.
name: Springel, V.
name: Di Matteo, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (ABRIDGED) We present in detail our new 3D numerical models for the accretion of stellar winds on to Sgr A*. In our most sophisticated models, we put stars on realistic orbits around Sgr A*, include `slow' winds (300 km/s), and account for radiative cooling. We first model only one phase `fast' stellar winds (1000 km/s). For wind sources fixed in space, the accretion rate is Mdot ~ 1e-5 Msun/yr, fluctuates by < 10%, and is in a good agreement with previous models. In contrast, Mdot decreases by an order of magnitude for stars following circular orbits, and fluctuates by ~ 50%. Then we allow a fraction of stars to produce slow winds. Much of these winds cool radiatively, forming cold clumps immersed into the X-ray emitting gas. We test two orbital configurations for the stars in this scenario, an isotropic distribution and two rotating discs with perpendicular orientation. The morphology of cold gas is quite sensitive to the orbits. In both cases, however, most of the accreted gas is hot, with an almost constant Mdot ~ 3e-6 Msun/yr, consistent with Chandra observations. The cold gas accretes in intermittent, short but powerful episodes which may give rise to large amplitude variability in the luminosity of Sgr A* on time scales of 10s to 100s of years. The circularisation radii for the flows are ~ 1e3 and 1e4 Rsch, for the one and two-phase wind simulations, respectively, never forming the quasi-spherical accretion flows suggested in some previous work. Our work suggests that, averaged over time scales of 100s to 1000s of years, the radiative and mechanical luminosity of Sgr A* may be substantially higher than it is in its current state. Further improvements of the wind accretion modelling of Sgr A* will rely on improved observational constraints for the wind properties and stellar orbits.
description: 16 pages, 18 colour figures. Accepted by MNRAS. Full resolution paper and movies available at http://www.mpa-garching.mpg.de/~jcuadra/Winds/ . (v2: minor changes)
The Strategic Interdependence of a Shared Water Aquifer: A General Equilibrium Analysis
Creators: name: Roe, Terry L.
name: Diao, Xinshen
name: Roe, Terry L.
name: Diao, Xinshen
Publisher: name: Unknown
Year: 1995
Subjects: Resource /Energy Economics and Policy

description: In a region with shared water aquifers, the use of water by one country becomes an externality to another. A policy to subsidize water is shown to lead to both countries being made worse off, but is likely to be supported by special interests having water rights, and those in sectors such as agricultural that uses water relatively intensively. The unilateral water tax will reduce own country's GNP and rise GNP in the other country. Only when both countries impose a tax cooperatively, will GNP rise in both countries.
Characterizing entanglement by momentum-jump in the frustrated Heisenberg ring at quantum phase transition
Creators: name: Qian, Xiao-Feng
name: Shi, Tao
name: Li, Ying
name: Song, Zhi
name: Sun, Chang-Pu
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the pairwise concurrences, a measure of entanglement, of the ground states for the frustrated Heisenberg ring to explore the relation between entanglement and quantum phase transition associated with the momentum jump. The groundstate concurrences between any two sites are obtained analytically and numerically. It shows that the summation of all possible pairwise concurrences is an appropriate candidate to depict the phase transition. We also investigate the role that the momentum takes in the jump of concurrence at the critical points. We find that an abrupt momentum change rusults in the maximal concurrence difference of two degenerate ground states.
description: 7 pages, 5 figures
How much can donor/acceptor-substitution change the responses of long push-pull systems to DC fields?
Creators: name: Springborg, Michael
name: Kirtman, Bernard
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Mathematical arguments are presented that give a unique answer to the question in the title. Subsequently, the mathematical analysis is extended using results of detailed model calculations that, in addition, throw further light on the consequences of the analysis. Finally, through a comparison with various recent studies, many of the latter are given a new interpretation.
description: Accepted by Chem. Phys. Lett
Fertility and Investments in Human Capital: Estimates of the Consequences of Imperfect Fertility Control in Malaysia
Creators: name: Rosenzweig, Mark R.
name: Schultz, T. Paul
name: Rosenzweig, Mark R.
name: Schultz, T. Paul
Publisher: name: Unknown
Year: 1987
Subjects: Labor and Human Capital

description: In this paper, we describe and utilize methods to estimate the consequences for children's schooling and birthweight of the exogenous variability in the supply of births in one low income country, Malaysia. The method utilizes information on contraceptive techniques employed by couples to estimate directly the technology of reproduction and provides a means of disentangling the biological and demand factors that contribute to the variation in fertility across couples under a regime of imperfect fertility control. Our results suggest that imperfect fertility control significantly influences both the average schooling attainment and birthweight of children in Malaysia, with couples having above-average propensities to conceive reporting higher levels of actual fertility, significantly lower expectations of and actual schooling attainment for their children, and lower birthweight children, on average, due to smaller intervals between births.
Sb-NQR probe for multipole degree of freedom in the first Pr-based heavy-fermion superconductor PrOs$_{4}$Sb$_{12}$
Creators: name: Tou, Hideki
name: Doi, Masahiro
name: Sera, Masafumi
name: Yogi, Mamoru
name: Sugawara, Hitoshi
name: Shiina, Ryousuke
name: Sato, Hideyuki
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report $^{121,123}$Sb nuclear quadrupole resonance (NQR) measurements in the filled-skutterudite superconductor PrOs$_4$Sb$_{12}$ in the temperature range of 0.05-30 K. The electric field gradients (EFG), $V_{zz}$ and $V_{xx}-V_{yy}$, at the Sb site exhibit unusual temperature dependence below 30 K. To explain these features, we discuss the coupling between the Sb nuclear quadrupole moment and Pr $4f^2$-derived multipole moments. The observed $T$ dependence of EFG is well explained by the CEF quasi-quartet consisted of $Γ_1$ singlet and $Γ_4^{(2)}$ triplet states in the cubic point group $T_h$. These results, in turn, are indicative of the importance of the coupling between the $^{121,123}$Sb quadrupole moments and the hexadecapole moment caused by the quasi-quartet.
description: 7 pages, 4 figures, (jpsj2.cls). to be published in J. Phys. Soc. Jpn. Vol.74, No.10
An adiabatic superconductor comparator with 46 nA sensitivity
Creators: name: Takeuchi, Naoki
name: Yamae, Taiki
name: Suzuki, Hideo
name: Yoshikawa, Nobuyuki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Adiabatic quantum-flux-parametron (AQFP) circuits can operate with extremely small energy dissipation (~1 zJ per junction at 5 GHz) and high sensitivity (~1 μA) owing to adiabatic switching. Thus, AQFP logic is suitable to use as readout interfaces for cryogenic detectors, such as superconducting nanowire single-photon detectors (SSPDs). In order to extend the application of AQFP logic to various detectors, it is crucial to achieve even better sensitivity because some detectors, such as WSi SSPDs and transition edge sensors (TESs), require sub-μA sensitivity. In the present study, we propose a high-sensitivity AQFP comparator with a current transformer (CT), which increases the equivalent input current and thereby improves the sensitivity. Numerical simulation shows that the proposed comparator achieves a sensitivity approximately six times better than that of a conventional AQFP comparator. Furthermore, we demonstrate a sensitivity of 46 nA at 4.2 K for a sampling frequency of 500 Hz in the experiment.
description: 5 pages, 5 figures
Messverfahren für die akustische Absorption in reinen Fluiden zur Bestimmung der Volumenviskosität
Creators: name: Claes, Leander
Publisher: name: Universität Paderborn
Year: 2021

description: Die vollständige Beschreibung fluiddynamischer und akustischer Vorgänge setzt voraus, dass die Eigenschaften des Fluids hinlänglich bekannt sind.Während Fluidkenngrößen, wie etwa die Schallgeschwindigkeit oder die Scherviskosität, für viele Flüssigkeiten über weite Bereiche des thermodynamischen Zustandsraums bekannt sind, existieren für die Volumenviskosität nur eine geringe Anzahl Messdaten.In dieser Arbeit wird daher ein Messverfahren zur selektiven Bestimmung der Volumenviskosität von Flüssigkeiten, basierend auf der Absorption von Ultraschallwellen, entwickelt und realisiert.Schwerpunkte bilden dabei der simulationsgestützte Entwurf von Algorithmen zur Auswertung der Messsignale sowie die Analyse und Weiterentwicklung einer Messanordnung, basierend auf dem Puls-Echo-Verfahren. Neben der Absorption im Fluid treten dabei weitere Effekte (zum Beispiel Beugung oder unvollständige Reflexion) auf, die das akustische Signal schwächen oder anderweitig beeinflussen. Die Entwicklung von Verfahren zur Trennung dieser Effekte von der akustischen Absorption bildet daher einen weiteren Schwerpunkt dieser Arbeit.Abschließend wird die Volumenviskosität aus der gemessenen akustischen Absorption für unterschiedliche Fluide in verschiedenen thermodynamischen Zuständen unter Zuhilfenahme anderer bekannter Fluidkenngrößen bestimmt sowie eine Unsicherheitsbetrachtung durchgeführt.
description: The prerequisite for a complete description of fluid dynamic and acoustic processes is that all properties of the fluid are known.While fluid parameters such as the speed of sound or the shear viscosity are known for many liquids over a wide range of thermodynamic states, only limited measurement data exist for the bulk viscosity.In this thesis, a measurement method for the selective determination of the bulk viscosity of liquids, based on the absorption of ultrasonic waves, is developed and implemented.The focus is on the simulation-driven design of algorithms for processing the measurement signals as well as the analysis and further development of a measurement set-up based on the pulse-echo method.In addition to absorption in the fluid, there are other effects (for example diffraction or incomplete reflection) that weaken or otherwise influence the acoustic signal.Therefore, the development of procedures to separate these effects from acoustic absorption is another focus of this work.The bulk viscosity is determined from the measured acoustic absorption for different fluids in different thermodynamic states. An uncertainty analysis of the measured quantities concludes this thesis.
Stability properties of a crack inverse problem in half space
Creators: name: Volkov, Darko
name: Jiang, Yulong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We show in this paper a Lipschitz stability result for a crack inverse problem in half space. The direct problem is a Laplace equation with zero Neumann condition on the top boundary. The forcing term is a discontinuity across the crack. This formulation can be related to geological faults in elastic media or to irrotational incompressible flows in a half space minus an inner wall. The direct problem is well posed in an appropriate functional space. We study the related inverse problem where the jump across the crack is unknown, and more importantly, the geometry and the location of the crack are unknown. The data for the inverse problem is of Dirichlet type over a portion of the top boundary. We prove that this inverse problem is uniquely solvable under some assumptions on the geometry of the crack. The highlight of this paper is showing a stability result for this inverse problem. Assuming that the crack is planar, we show that reconstructing the plane containing the crack is Lipschitz stable despite the fact that the forcing term for the underlying PDE is unknown. This uniform stability result holds under the assumption that the forcing term is bounded above and the Dirichlet data is bounded below away from zero in appropriate norms.
description: 1 figure
Topological Quantum Criticality in Superfluids and Superconductors: Surface criticality, Thermal properties, and Lifshitz Majorana fields
Creators: name: Yang, Fan
name: Zhou, Fei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Time reversal invariant (TRI) topological superfluids (TSFs) and topological superconductors (TSCs) are robust symmetry protected gapped topological states. In this article, we study the evolution of these topological states in the presence of time reversal symmetry breaking (TRB) fields and/or sufficiently large TRI fields. Physically, one of the realizations of TRB fields can be internal spin exchange fields due to background magnetic ordering. We find that the fully gapped TSFs and TSCs are generically separated from other nodal states by various zero temperature quantum critical points that are characterized by generalized quantum Lifshitz fields with distinct scaling properties. These emergent Lifshitz fields also define finite temperature properties in quantum critical regimes. Moreover, for a certain subset of TRB fields, there exist a precursor to bulk transitions, where surface states can also exhibit quantum critical behavior near zero fields. The possibility for a fully gapped TSF/TSC to smoothly crossover into a topologically trivial state without a phase transition is also examined.
description: 20 pages, 5 figures
NLO supersymmetric QCD corrections to the $t \bar b H^-$ associated production at hadron colliders
Creators: name: Peng, Wu
name: Wen-Gan, Ma
name: Ren-You, Zhang
name: Yi, Jiang
name: Liang, Han
name: Lei, Guo
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the next-to-leading order QCD corrected total cross sections and the distributions of the transverse momenta of the final anti-bottom-quark, top-quark and charged Higgs-boson for the processes of $p\bar p/pp \to t\bar b H^-+X$ in the minimal supersymmetric standard model(MSSM) at the Tevatron and the LHC. We find that the NLO QCD corrections significantly modify the leading-order distributions of the transverse momenta of final particles($p_T^b$, $p_T^t$ and $p_T^{H^-}$), and the total NLO QCD corrections reduce the dependence of the cross section on the renormalization and factorization scales, especially the NLO QCD corrected cross sections at the LHC are nearly independent of these scales. Our results show that the relative correction is obviously related to $m_{H^-}$ and $\tanβ$, and the total NLO QCD relative corrections can be beyond -50% at the Tevatron and approach -40% at the LHC in our chosen parameter space.
description: Latex files, 26 eps figures included. Accepted for publication in Phys. Rev. D
The Time is Now: (Re)visioning, (Re)assessing, and (Re)storing the State of Educational Research for African American Women and Girls
Creators: name: Young, Jemimah
name: Butler, Bettie
name: King, Natalie
name: Wandix-White, Diana
Publisher: name: Journal of African American Women and Girls in Education
Year: 2021

description: We are in a time and place where the lives of Black women and girls have to do more than "matter" in education; they must be researched, understood, and enhanced through transformative educational praxis. The Journal of African American Women and Girls in Education (JAAWGE) issued a call for papers for its inaugural issue that sought to elucidate Black women and girls' educational experiences across a variety of disciplines, contexts, and geographic settings. Through this work, the constituency of JAAWGE aims to illuminate Black women and girls' brilliance and resilience by placing their voices at the forefront of educational research and discourse, while leading and creating pathways that are not only attainable, but sustainable. This inaugural issue highlights research from various fields that speak directly to the multiplicity of these women and girls’ experiences in education across disciplines that utilize a vast array of theoretical frameworks and methodological approaches that are humanizing and centered on Black women and girls.
description: Journal of African American Women and Girls in Education, Vol. 1 No. 1 (2021): Spring 2021
Consumption Smoothing, Migration and Marriage: Evidence from Rural India
Creators: name: Rosenzweig, Mark R.
name: Stark, Oded
name: Rosenzweig, Mark R.
name: Stark, Oded
Publisher: name: Unknown
Year: 1987
Subjects: Consumer/Household Economics

description: Migration in India, particularly in rural areas, is dominated by the movements of women for the purpose of marriage. We seek to explain these mobility patterns by examining marital arrangements among Indian households. In particular, we hypothesize that the marrying out of daughters to locationally distant, dispersed yet kinship-related households, are manifestations of implicit inter-household contractual arrangements aimed at mitigating income risks and facilitating consumption smoothing in an environment characterized by information costs and spatially covariant risks. Analysis of longitudinal South Indian village data lends support to the hypothesis. Marriage cum migration contributes significantly to a reduction in the variability of household food consumption. Farm households afflicted with more variable profits tend to engage in longer distance marriage cum migration. The hypothesized and observed marriage cum migration patterns are in dissonance with standard models of marriage or migration which are concerned primarily with search costs and static income gains.
Asymptotic Quasinormal Frequencies of Brane-Localized Black Hole
Creators: name: Park, D. K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The asymptotic quasinormal frequencies of the brane-localized $(4+n)$-dimensional black hole are computed. Since the induced metric on the brane is not an exact vacuum solution of the Einstein equation defined on the brane, the real parts of the quasinormal frequencies $ ω$ do not approach to the well-known value $T_H \ln 3$ but approach to $T_H \ln k_n$, where $k_n$ is a number dependent on the extra dimensions. For the scalar perturbation $Re(ω/ T_H) = \ln 3$ is reproduced when $n = 0$. For $n \neq 0$, however, $Re(ω/ T_H)$ is smaller than $\ln 3$. It is shown also that when $n > 4$, $Im(ω/ T_H)$ vanishes in the scalar perturbation. For the gravitational perturbation it is shown that $Re(ω/ T_H) = \ln 3$ is reproduced when $n = 0$ and $n = 4$. For different $n$, however, $Re(ω/ T_H)$ is smaller than $\ln 3$. When $n = \infty$, for example, $Re(ω/ T_H)$ approaches to $\ln (1 + 2 \cos \sqrt{5} π) \approx 0.906$. Unlike the scalar perturbation $Im(ω/ T_H)$ does not vanish regradless of the number of extra dimensions.
description: 15 pages, 1 eps figure: V2 one more reference added. The derivtaion of the effective potential is explained in detail. Version of PLB