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Gotowa bibliografia na temat „Magnetisation M(T,H)”

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Data publikacji: 25 maja 2024

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Artykuły w czasopismach na temat "Magnetisation M(T,H)"

1

GABOVICH, A. M., D. P. MOISEEV, G. I. PANAITOV, V. M. POSTNIKOV, A. S. SIDORENKO i A. Yu SIMONOV. "RELAXATION OF THE MAGNETISATION IN SUPERCONDUCTING OXIDES". International Journal of Modern Physics B 03, nr 10 (październik 1989): 1503–9. http://dx.doi.org/10.1142/s0217979289000968.

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Relaxation of the thermoremanent magnetisation M in oxide superconductors BaPb 0.75 Bi 0.25 O 3, YBa 2 Cu 3 O 7−δ, Bi 2 Sr 2 CaCu 2 O x and Bi 4 Sr 3 Ca 4 Cu 4 O x is measured at T=4.2 K by the SQUID magnetometer. It is well described by the law M(t)=M0- Sln t, where t is the time, M0 and S are constants. The dependence of the decay rate S on the external magnetic field H is investigated in detail for the ceramics BaPb 0.75 Bi 0.25 O 3 with a low first critical magnetic field H cl ~12 Oe .
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2

Korsakova, Alina S., Dzmitry A. Kotsikau, Yulyan S. Haiduk i Vladimir V. Pankov. "Synthesis and Physicochemical Properties of MnxFe3–xO4 Solid Solutions". Kondensirovannye sredy i mezhfaznye granitsy = Condensed Matter and Interphases 22, nr 4 (1.12.2020): 466–72. http://dx.doi.org/10.17308/kcmf.2020.22/3076.

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Ferrimagnetic nanoparticles are used in biotechnology (as drug carriers, biosensors, elements of diagnostic sets, contrast agents for magnetic resonance imaging), catalysis, electronics, and for the production of magnetic fluids and magnetorheological suspensions, etc. The use of magnetic nanoparticles requires enhanced magnetic characteristics, in particular, high saturation magnetisation.The aim of our study was to obtain single-phased magnetic nanoparticles of MnxFe3–xO4 solid solutions at room temperature. We also studied the dependence of the changes in their structure, morphology, and magnetic properties on the degree of substitution in order to determine the range of the compounds with the highest magnetisation value.A number of powders of Mn-substituted magnetite MnxFe3–xO4 (x = 0 – 1.8) were synthesized by means of co-precipitation from aqueous solutions of salts. The structural and micro-structural features and magnetic properties of the powders were studied using magnetic analysis, X-ray diffraction, transmission electron microscopy, and IR spectroscopy.The X-ray phase analysis and IR spectroscopy confirm the formation of single-phase compounds with cubic spinel structures. The maximum increase in saturation magnetization as compared to non-substituted magnetite was observed for Mn0.3Fe2.7O4 (Ms = 68 A·m2·kg–1 at 300 K and Ms = 85 A·m2·kg–1 at 5 K). This is associated with the changes in the cation distribution between the tetrahedral and octahedral cites.A method to control the magnetic properties of magnetite by the partial replacement of iron ions in the magnetite structure with manganese has been proposed in the paper. The study demonstrated that it is possible to change the magnetisation and coercivity of powders by changing the degree of substitution. The maximum magnetisation corresponds to the powder Mn0.3Fe2.7O4. The nanoparticles obtained by the proposed method have a comparatively high specific magnetisation and a uniform size distribution. Therefore the developed materials can be used for the production of magnetorheological fluidsand creation of magnetically controlled capsules for targeted drug delivery and disease diagnostics in biology and medicine (magnetic resonance imaging). References1. Gubin C. G., Koksharov Yu. A., Khomutov G. B.,Yurkov G. Yu. Magnetic nanoparticles: preparation,structure and properties. Russian Chemical Reviews2005;74(6): 539–574. Available at: https://www.elibrary.ru/item.asp?id=90858192. Skumr yev V. , Stoyanov S. , Zhang Y. ,Hadjipanayis G., Givord D., Nogués J. Beating thesuperparamagnetic limit with exchange bias. Nature.2003;423(6943): 850–853. DOI: https://doi.org/10.1038/nature016873. Joseph A., Mathew S. Ferrofluids: syntheticstrategies, stabilization, physicochemical features, characterization, and applications. ChemPlusChem.2014;79(10): 1382–1420. DOI: https://doi.org/10.1002/cplu.2014022024. Mathew D. S., Juang R.-S. An overview of thestructure and magnetism of spinel ferrite nanoparticlesand their synthesis in microemulsions. ChemicalEngineering Journal. 2007:129(1–3): 51–65. DOI:https://doi.org/10.1016/j.cej.2006.11.0015. Rewatkar K. G. Magnetic nanoparticles:synthesis and properties. Solid State Phenomena.2016:241: 177–201. DOI: https://doi.org/10.4028/www.scientific.net/ssp.241.1776. Tartaj P., Morales M. P., Veintemillas-VerdaguerS., Gonzalez-Carre´no T., Serna C. J. Thepreparation of magnetic nanoparticles for applicationsin biomedicine. Journal of Physics D: Applied Physics.2003: 36 (13): 182–197. DOI: : https://doi.org/10.1088/0022-3727/36/13/2027. West A. Khimiya tverdogo tela. Teoriya iprilozheniya [Solid State Chemistry and Its Applications].In 2 parts Part 1. Transl. from English. Moscow, Mir,1988 558 p.8. Spravochnik khimika: V 6 t. 2-e izd. Obshchiyesvedeniya. Stroyeniye veshchestva. Svoystva vazhneyshikhveshchestv. Laboratornaya tekhnika [Chemist’sHandbook: In 6 volumes, 2nd ed. General information.The structure of matter. Properties of the mostimportant substances. Laboratory equipment]. B. P.Nikolskiy (ed.) Moscow – Leningrad: GoskhimizdatPubl.; 1963. V. 1. 1071 p. (In Russ.)9. Zhuravlev G. I. Khimiya i tekhnologiya ferritov[Ferrite chemistry and technology]. Leningrad:Khimiya Publ.; 1970. p. 192. (In Russ.)10. Mason B. Mineralogical aspects of the systemFeO-Fe2O3-MnO-Mn2O3. Geologiska Föreningen iStockholm Förhandlingar. 1943;65(2): 97–180. DOI:https://doi.org/10.1080/1103589430944714211. Guillemet-Fritsch S., Navrotsky A., TailhadesPh., Coradin H., Wang M. Thermochemistry of ironmanganese oxide spinels. Journal of Solid StateChemistry. 2005;178(1):106–113. DOI: https://doi.org/10.1016/j.jssc.2004.10.03112. Ortega D. Structure and magnetism in magneticnanoparticles. In: Magnetic Nanoparticles: FromFabrication to Clinical Applications. Boca Raton: CRCPress; 2012. p. 3–72. DOI:https://doi.org/10.1201/b11760-313. Kodama T., Ookubo M., Miura S., Kitayama Y.Synthesis and characterization of ultrafine Mn(II)-bearing ferrite of type MnxFe3-xO4 by coprecipitation.Materials Research Bulletin... 1996:31(12): 1501–1512.DOI: https://doi.org/10.1016/s0025-5408(96)00146-814. Al-Rashdi K. S., Widatallah H., Al Ma’Mari F.,Cespedes O., Elzain M., Al-Rawas A., Gismelseed A.,Yousif A. Structural and mossbauer studies ofnanocrystalline Mn2+ doped Fe3O4 particles. HyperfineInteract. 2018:239(1): 1–11. DOI: https://doi.org/10.1007/s10751-017-1476-915. Modaresi N., Afzalzadeh R., Aslibeiki B.,Kameli P. Competition between the Impact of cationdistribution and crystallite size on properties ofMnxFe3–xO4 nanoparticles synthesized at roomtemperature. Ceramics International. 2017:43(17):15381–15391. DOI: https://doi.org/10.1016/j.ceramint.2017.08.079
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3

Azad, A. K., S. G. Eriksson, Håkan Rundlöf i J. Eriksen. "Synthesis and Crystal Structure of the Double Perovskite Ca2-xSrxMnWO6 (x = 0.0, 0.5, 1.0, 1.5, 2.0)". Materials Science Forum 443-444 (styczeń 2004): 375–78. http://dx.doi.org/10.4028/www.scientific.net/msf.443-444.375.

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The double perovskites Ca2-xSrxMnWO6(x = 0.0, 0.5, 1.0, 1.5, 2.0) have been prepared as pure phases by a conventional solid-state reaction process. Stoichiometric amounts of CaCO3,SrCO3, MnO and WO3were mixed, ground and calcined in a nitrogen atmosphere. X-ray and neutron powder diffraction (NPD), together with magnetisation measurements were carried out in order to characterise the materials. The NPD and magnetisation measurements, performed at different temperatures, were made in order to correlate the materials structural and magnetic properties. Susceptibility- Temperature (ϰ-T) curves were measured between 2K and 200K in field cooled (FC) and zero-field-cooled (ZFC) modes with an applied field (H) up to 3T. Rietveld analysis of NPD data shows that the samples were B-site ordered perovskites with different types of lattice symmetry. Magnetisation measurements at low temperatures indicate an antiferromagnetic ordering of the magnetic moments.
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ZOLA, D., M. POLICHETTI i S. PACE. "THE FIRST SECONDS IN THE MAGNETIC RELAXATION ON MULTIFILAMENTARY BSCCO(2223)/AG TAPES". International Journal of Modern Physics B 14, nr 25n27 (30.10.2000): 2890–95. http://dx.doi.org/10.1142/s0217979200003058.

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The first 60 seconds of the magnetisation decay M(t) of a multifilamentary BSCCO/Ag tape has been studied by a vibrating sample magnetometer. Measurements were performed at different temperatures T [4.2 K ÷ 45 K] and DC magnetic fields up to 11 T. The behaviour in the first seconds after the external field is stopped are often neglected due to the presence of far from equilibrium magnetic states, which are function of the initial conditions or of the sample characteristics. We have observed a fast decay in the first 10 seconds, which has been analysed at different temperatures and several external fields. Finally a possible mechanism, responsible of the observed behaviour is discussed.
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Vecchione, A., M. Polichetti, M. Gombos i S. Pace. "Spatial Distribution of Superconducting Properties of High Rate Directionally Solidified YBCO Samples". International Journal of Modern Physics B 13, nr 09n10 (20.04.1999): 1085–90. http://dx.doi.org/10.1142/s0217979299000990.

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We report on spatial distribution of structural and superconducting properties in directionally solidified YBCO samples. The recrystallization process of produced YBCO bar was determined by a motion into a horizontal furnace at very high pulling rate in a fixed thermal gradient. Texturing and stoichiometry of several slices cut from the original bar have been studied by XRD and SEM with coupled EDS analysis. The magnetisation cycles of all the slices (M(H) Loops) were obtained by means a Vibrating Sample Magnetometer at 70 K using applied magnetic fields up to 2 tesla.
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Young, Olga, Geetha Balakrishnan, Pascal Manuel, Dmitry Khalyavin, Andrew Wildes i Oleg Petrenko. "Field-Induced Transitions in Highly Frustrated SrHo2O4". Crystals 9, nr 10 (22.09.2019): 488. http://dx.doi.org/10.3390/cryst9100488.

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SrHo 2O 4 is a geometrically frustrated magnet in which the magnetic Ho 3 + ions are connected through a network of zigzag chains and coupled by several competing interactions. The Ho 3 + ions show a pronounced Ising anisotropy at low temperatures, and the spins on the two crystallographically inequivalent magnetic sites point along orthogonal crystallographic axes. Using single-crystal neutron diffraction, we report on the development of complex and highly anisotropic short- and long-range magnetic order in SrHo 2O 4 induced by an applied magnetic field. For H ‖ c , the diffuse scattering around the k = 0 positions is suppressed and above 0.5 T the spin structure for one of the Ho sites is long-range and ferromagnetic. For H ‖ b , planes of diffuse scattering at Q = ( h k ± l 2 ) are split by the field, and an up–up–down magnetic order associated with a 1/3-magnetisation plateau develops at 0.8 T. Further increasing the field above 1.2 T allows the second Ho site to also order in a long-range ferromagnetic structure.
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POLOHCKIJ, A. "M?ct??a b ???h? ? m?ct????m b tbop?etbe ?e?opa t?t?eba". Russian Literature 54, nr 4 (15.11.2003): 505–24. http://dx.doi.org/10.1016/s0304-3479(03)90003-2.

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Linh, Dinh Chi, Dao Son Lam, Nguyen Thi Viet Chinh, Dang Duc Dung, Ngo Tran i Tran Dang Thanh. "Enhanced ferroelectric and ferromagnetic properties of xNiFe2O4/(1–x)Ba0.94Ca0.06Ti0.975Zr0.025O3 nanocomposites". Advances in Natural Sciences: Nanoscience and Nanotechnology 14, nr 2 (27.04.2023): 025003. http://dx.doi.org/10.1088/2043-6262/accc7a.

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Abstract Bi-phase multiferroic composites of NiFe2O4/Ba0.94Ca0.06Ti0.975Zr0.025O3 (BCTZ/NFO) were successfully fabricated by high-energy ball milling combined with heat treatment. X-ray diffraction patterns and Raman spectra confirmed the successful coexistence of BCTZ and NFO phases in the final composites, which had an average particle size of 50 nm. However, the number of large particles increased with the increased NFO concentration in the composites. Optical properties of the composites were also modified by the NFO content, where the absorption band tended to the visible region and band-gap energies (E g) decreased with the increase of NFO. Ferromagnetic and ferroelectric properties of the BCTZ/NFO composites were also tuned by NFO additive content. Both saturation magnetisation (M s) and remnant magnetisation (M r) increased with the increase of NFO content, where the maximum values of M s = 22.52 emu g−1 and M r = 1.48 emu g−1 for composites with 40% NFO concentration, while coercivity (H c) was maintained at about 60 Oe. Maximum polarisation (P max), remnant polarisation (P r), and coercive field (E c) values all increased with NFO concentration, with 10% NFO providing the highest P max (= 0.249 μC cm−2) and P r (= 0.116 μC cm−2) values, and 30% NFO providing the highest E c (= 1.720 kV cm−1) value with a maximum applied voltage of 1 kV. Therefore, the multiferroic properties of BCTZ/NFO composites could be enhanced with an appropriate concentration of NFO, which led to a wide range of practical applications in the advanced electronic device field.
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Khan, Majid, Zahid Rasheed, Syed Masroor Anwar i Jimmy Joseph Namangale. "Triple Homogeneously Weighted Moving Average Charts for Monitoring Process Dispersion". Mathematical Problems in Engineering 2023 (3.02.2023): 1–34. http://dx.doi.org/10.1155/2023/6996280.

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Homogeneously weighted moving average ( H W M A ) charts have recently achieved popularity for monitoring small changes in process parameters (location and/or dispersion). Furthermore, the D H W M A (double H W M A ) and T H W M A (triple H W M A ) are the advanced versions of the H W M A charts. The H W M A chart for the process dispersion is designed to detect only the upward (one-sided) shift (i.e., process deterioration). Employing a two-sided chart for concurrently detecting both process improvement and process deterioration is an important aspect of statistical process monitoring. By taking this point as motivation, one and two-sided T H W M A charts (symbolized as the T H W M A V ) are proposed for monitoring the process dispersion. The Monte Carlo simulations are performed to investigate the performance behavior of the T H W M A V charts in terms of certain performance indicators, including A R L , S D R L , E Q L , R A R L , and P C I . The comparison among the T H W M A V versus existing charts ( D H W M A V , H W M A V , T E W M A V , D E W M A V , and E W M A V ) indicates that the T H W M A V charts outperform the existing charts. Finally, a dataset is also analyzed to illustrate the implementation of the T H W M A V charts.
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Al-Zoubi, Khaldoun, i Shatha Alghueiri. "On graded Jgr -classical 2-absorbing submodules of graded modules over graded commutative rings". Demonstratio Mathematica 54, nr 1 (1.01.2021): 162–67. http://dx.doi.org/10.1515/dema-2021-0015.

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Abstract Let G be an abelian group with identity e e . Let R be a G-graded commutative ring with identity 1, and M M be a graded R-module. In this paper, we introduce the concept of graded J g r {J}_{gr} -classical 2-absorbing submodule as a generalization of a graded classical 2-absorbing submodule. We give some results concerning of these classes of graded submodules. A proper graded submodule C C of M M is called a graded J g r {J}_{gr} -classical 2-absorbing submodule of M M , if whenever r g , s h , t i ∈ h ( R ) {r}_{g},{s}_{h},{t}_{i}\in h\left(R) and x j ∈ h ( M ) {x}_{j}\in h\left(M) with r g s h t i x j ∈ C {r}_{g}{s}_{h}{t}_{i}{x}_{j}\in C , then either r g s h x j ∈ C + J g r ( M ) {r}_{g}{s}_{h}{x}_{j}\in C+{J}_{gr}\left(M) or r g t i x j ∈ C + J g r ( M ) {r}_{g}{t}_{i}{x}_{j}\in C+{J}_{gr}\left(M) or s h t i x j ∈ C + J g r ( M ) , {s}_{h}{t}_{i}{x}_{j}\in C+{J}_{gr}\left(M), where J g r ( M ) {J}_{gr}\left(M) is the graded Jacobson radical.
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Rozprawy doktorskie na temat "Magnetisation M(T,H)"

1

Umugabe, Gilbert. "Enhanced magnetoelastic coupling in bulk magnetoelectric composites prepared by Laser Heated Pedestal Growth". Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS502.

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Dans la recherche de matériaux magnétoélectriques (ME) présentant des performances ME élevées, nous étudions dans cette thèse certains mécanismes fondamentaux qui conduit au renforcement du couplage magnéto-élastique dans les composites MEs. Notre étude porte sur les composites particulaires 0-3 composés de phase magnétostrictive (MS) de CFO imbibée dans des matrices ferroélectriques (FE) suivantes : à base de Pb PZT, PMNPT et leur alternative sans plomb KNN et BTO. Nous démontrons que la technique Laser Heated Pedestal Growth (LHPG) peut être utilisé pour synthétiser des échantillons massives avec une microstructure texturée prononcée entre les phases FE et MS. Scanning electron microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS) et X-ray diffraction (XRD) sont utilisés pour caractériser systématiquement l’orientation des grains, la taille des grains and la qualité d’interface entre les différentes phases citées ci-avant. Une étude systématique par le biais de la spectroscopie Raman, les mesures de magnétisation M (H,T) et de chaleur spécifique C(T,H) nous ont permis de sonder le couplage magnéto-élastique directement dans les échantillons MEs. En combinant les analyses des données structurales et thermodynamiques précédentes, cela montre que la structure avec une texture prononcée dans les échantillons synthétisés par LHPG conduit à une forte augmentation de la réponse magnéto-élastique. Nous soutenons que ce résultat est très prometteur pour la conception des matériaux ME. Enfin, nous suggérons que l'étude de la chaleur spécifique précédent offre une sonde sans contact pour étudier le couplage spin-réseau de manière intrinsèque dans une large gamme de matériaux ME y compris les multiférroiques
In the search for magnetoelectric (ME) materials with enhanced ME performances, in the present thesis we investigate some fundamental mechanisms leading to an enhanced magnetoelastic coupling in artificial ME composites. We focus on 0-3 particulate composites made of a magnetostrictive (MS) phase CFO embedded in the following ferroelectric (FE) matrices: Pb-based PZT, PMNPT and alternative lead-free KNN and BTO. We demonstrate that the laser heated pedestal growth (LHPG) technique can be successfully used to grow high-quality bulk samples exhibiting a pronounced textured microstructure between the FE and MS phases. Scanning electron microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDS) and X-ray diffraction (XRD) were used to characterise systematically grain orientation, grain size and quality of the interface between the FE and MS phases. A systematic study by means of Raman spectroscopy, magnetisation M(T,H) and field-dependent specific heat C(T,H) measurements enabled us to probe directly the magnetoelastic coupling in the ME samples. The combined analysis of the above structural and thermodynamic data consistently shows that the pronounced textured structure of the LHPG samples leads to an impressive enhancement of the magnetoelastic response. We argue that this result is very promising for ME material design. We finally propose that the above specific heat study offers a contactless probe to investigate the intrinsic spin-lattice coupling in a wide range of ME materials including multiferroics
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Coleman, Cal. "M Y T H I C". Digital Commons at Loyola Marymount University and Loyola Law School, 2021. https://digitalcommons.lmu.edu/etd/990.

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Mythic is an animated family series that will collide the worlds of the beloved Disney style musical feature, with everyday children’s programming. Based on 8 public domain works by Hans Christian Andersen, the series will follow Princess Viv, Farmhand Penelope, Pit-Pocket Leina, and a hopelessly romantic Prince Agner, as they travel through magical kingdoms in hopes of retrieving 8 mythical relics. Together, the four will learn about the meaning of love, the danger of greed, and the joy of being selfless as they fight to keep Leina from becoming a true villain.
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3

Schmidt, Sarah J., Erika L. Wagoner, Jennifer A. Johnson, James R. A. Davenport, Keivan G. Stassun, Diogo Souto i Jian Ge. "Examining the relationships between colour, T eff , and [M/H] for APOGEE K and M dwarfs". OXFORD UNIV PRESS, 2016. http://hdl.handle.net/10150/621724.

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We present the effective temperatures (T-eff), metallicities, and colours in Sloan Digital Sky Survey (SDSS), Two Micron All Sky Survey, and Wide-field Infrared Survey Explorer filters, of a sample of 3834 late-K and early-M dwarfs selected from the SDSS Apache Point Observatory Galactic Evolution Experiment (APOGEE) spectroscopic survey ASPCAP (APOGEE Stellar Parameters and Chemical Abundances Pipeline) catalogue. We confirm that ASPCAP T-eff values between 3550 < T-eff < 4200 K are accurate to similar to 100 K compared to interferometric T-eff values. In that same T-eff range, ASPCAP metallicities are accurate to 0.18 dex between -1.0 <[M/H]< 0.2. For these cool dwarfs, nearly every colour is sensitive to both T-eff and metallicity. Notably, we find that g - r is not a good indicator of metallicity for near-solar metallicity early-M dwarfs. We confirm that J - K-S colour is strongly dependent on metallicity, and find that W1 - W2 colour is a promising metallicity indicator. Comparison of the late-K and early-M dwarf colours, metallicities, and T-eff to those from three different model grids shows reasonable agreement in r - z and J - K-S colours, but poor agreement in u - g, g - r, and W1 - W2. Comparison of the metallicities of the KM dwarf sample to those from previous colour-metallicity relations reveals a lack of consensus in photometric metallicity indicators for late-K and early-M dwarfs. We also present empirical relations for T-eff as a function of r - z colour combined with either [M/H] or W1 - W2 colour, and for [M/H] as a function of r - z and W1 - W2 colour. These relations yield T-eff to similar to 100 K and [M/H] to similar to 0.18 dex precision with colours alone, for T-eff in the range of 3550-4200 K and [M/H] in the range of -0.5-0.2.
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Friedrich, Daniel [Verfasser], M. T. [Akademischer Betreuer] Stubbs, M. [Akademischer Betreuer] Hildebrandt i H. U. [Akademischer Betreuer] Demuth. "Attractin : biochemische und funktionelle Charakterisierung / Daniel Friedrich. Betreuer: M. T. Stubbs ; M. Hildebrandt ; H.-U. Demuth". Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2010. http://d-nb.info/1025133366/34.

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Medeiros, Ramon Rud? Brito. "Estudo de desempenho de um sistema h?brido fotovoltaico/t?rmico". PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA MEC?NICA, 2017. https://repositorio.ufrn.br/jspui/handle/123456789/22399.

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O presente trabalho apresenta um estudo de desempenho de um sistema h?brido fotovoltaico/t?rmico (sistema PVT), comparando-o com um sistema fotovoltaico (sistema PV). Foi analisada a pot?ncia el?trica e t?rmica, a efici?ncia e a energia produzida pelos sistemas, correlacionando ? influ?ncia da temperatura do m?dulo PV e a efici?ncia el?trica dos sistemas. O m?dulo fotovoltaico (PV) utilizado foi o MSX 77 da marca SOLAREX, composto por c?lulas solares policristalinas, cuja pot?ncia de pico ? de 77 Watts. O sistema PVT analisado foi do tipo PVT-l?quido, composto pelo m?dulo PV MSX77 e um coletor solar plano do tipo placa fabricado em acr?lico, a alimenta??o de ?gua do coletor foi do tipo for?ada por gravidade e com sistema aberto. Para determinar as curvas caracter?sticas do m?dulo PV e por consequ?ncia a pot?ncia el?trica m?xima gerada, foi desenvolvido um banco de carga formado por resistores de pot?ncia. A pot?ncia t?rmica foi quantificada aferindo a vaz?o da ?gua que alimentava o coletor e a diferen?a de temperatura da ?gua de entrada e sa?da. Com as pot?ncias e a radia??o incidente sobre os sistemas, foram determinadas as efici?ncias. A m?xima efici?ncia el?trica informada pelo fabricante do m?dulo PV ? de 10,8 %, contudo, em condi??es reais de opera??o, a m?xima efici?ncia do m?dulo PV foi de 8,46 %. No sistema PVT, o m?dulo PV apresentou uma efici?ncia m?xima de aproximadamente 7,8 % no ponto de m?xima pot?ncia gerada. A efici?ncia m?dia do sistema t?rmico foi na ordem de 42,5 %. O sistema PVT proporcionou a redu??o da temperatura do m?dulo PV, aumentando a efici?ncia de gera??o el?trica, proporcionando um aumento na ordem dos 6,9 % na energia el?trica m?dia di?ria. O sistema PVT al?m de proporcionar um aumento de energia el?trica, ainda fornece energia t?rmica com uma efici?ncia superior ? el?trica. A ?gua aquecida pode ser utilizada para alimentar sistemas de aquecimento de ?gua para banho, contribuindo para redu??o do consumo de energia el?trica de uma resid?ncia.
The present dissertation presents a performance study of a hybrid photovoltaic / thermal system (PVT system), comparing it with a photovoltaic system (photovoltaic system). The electrical and thermal power, efficiency and energy produced by the systems were analyzed, correlating the influence of the temperature of the photovoltaic module and the electrical efficiency of the systems. The photovoltaic (PV) module used was the MSX 77 of the brand SOLAREX, composed of polycrystalline solar cells, whose peak power is 77 Watts. The PVT system analyzed was of the PVT-liquid type, composed of the MSX77 photovoltaic module and a flat plate type solar collector made of acrylic, the water supply of the manifold was forced by gravity and with open system. To determine the characteristic curves of the PV module and consequently the maximum electric power generated, a load bank formed by power resistors was developed. The thermal power was quantified by measuring the flow of the water that fed the collector and the difference in temperature of the incoming and outgoing water. With the powers and the radiation incident on the systems, the efficiencies were determined. The maximum electrical efficiency reported by the manufacturer of the PV module is 10.8 %, however, under actual operating conditions, the maximum efficiency of the PV module was 8.46 %. In the PVT system, the PV module showed a maximum efficiency of approximately 7.8 % at the point of maximum power generated. The average efficiency of the thermal system was around 42.5 %. The PVT system provided a reduction in the temperature of the PV module, increasing the efficiency of electric generation, providing an increase in the order of 6.9 % in the average daily electric energy. The PVT system, besides providing an increase in electrical energy, still provides thermal energy with a higher efficiency than electric. The heated water can be used to power water heating systems for bathing, contributing to reduce the consumption of electric energy of a residence.
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Pérez, Carreras Adrià. "T-H-M coupling with large advection in fractured rock masses using zero-thickness interface elements". Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/671102.

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The study of hydro-mechanical (HM) coupled problems in different areas of civil, environmental or petroleum engineering is common in literature, but the effect of a thermal field by means of the heat transport by a fluid through the discontinuities is not considered in the current tools of analysis, in which the effect of the temperature gradient between the fluids flowing through the discontinuities and the in-situ thermal state are not considered. In geomechanics modeling it is important to distinguish between the hydraulic behavior of the porous medium and that of the discontinuities, together generating a double-permeability system where the discontinuities establish preferential flow paths. Because of high hydraulic velocities in the discontinuities, the advection (transport) may be the dominant heat transfer mode. Thus, the study of THM coupled processes with thermal advection in discontinuities is important in problems with a certain degree of coupling between the mechanical, hydraulic and thermal fields, and in which the hydraulic flow transports heat through the discontinuities. It is important to establish a numerical model to study the advection phenomena that differentiates the discontinuity network and the porous medium contributions. In this context, this thesis focuses on the study, formulation, numerical implementation and verification of a THM fully-coupled model with large advection, able to reproduce the advective behaviour that occurs in discontinuities, in which heat is transported by the fluid. This numerical approach is carried out using the finite element method (FEM) with zero-thickness interface elements to represent the discontinuities, and assuming saturated conditions and a single incompressible fluid (constant density). It is also assumed that all the non-linear behaviour occurs at the interface elements by means of an elasto-plastic constitutive law based on fracture mechanics. Additionally, the numerical approach to the thermal advection presents a singularity in comparison with pure diffusive problems. If the fluid velocities are low, the numerical formulation can be made by traditional FEM (Galerkin). However, when the fluid velocities are high and the advection dominates the problem, the standard Galerkin weighting leads to oscillatory results, and the advective term requires a special treatment to stabilize the numerical solution. A review of different methodologies to solve the large advective problem is presented, selecting the Streamline Upwind Petrov-Galerkin method to solve the steady-state. For transient states, this thesis starts with the study of the existing explicit Characteristic Galerkin Method (CGM), which studies the advective phenomena in a Lagrangian manner, following the particle (or heat) with the fluid by setting a moving coordinate system that depends on the fluid velocity and its position in time. Then the implicit CGM is developed, and finally a new variation is proposed adding a parameter alpha that allows determining different temporal derivative positions of the advective volume, leading to the alpha-Implicit CGM, that allows to obtain stable solutions if the Courant condition is fulfilled. In order to verify the THM model with large advection for continuum medium and zero-thickness interfaces, several simple verification examples are presented. Finally, an application to hydraulic fracture (HF) with a single fracture in 2-D is introduced in order to understand the thermal mechanisms that occur in HF problems and how they affect the mechanical and hydraulic fields. In addition, these results are compared with those obtained using the HM model, where the thermal field is not considered. Finally, in order to improve the computational capacities of the FEM code, its parallelization has performed following a subdomain decomposition strategy, leading to a substantial improvement in the speed of the calculations and showing a good degree of scalability.
El estudio de problemas hydro-mecánicos (HM) acoplados en diferentes áreas de ingeniería civil, ambiental o del petróleo es común en la literatura, pero los efectos térmicos del fluido transportando calor a través de fracturas o discontinuidades no se considera en las actuales herramientas de análisis, en las cuales el efecto de la diferencia de temperatura entre el fluido inyectado a través de las discontinuidades y la del medio in situ no se tiene en cuenta. No obstante, en algunos problemas geomecánicos los comportamientos mecánico, hidráulico y térmico del medio poroso fracturado pueden aparecer acoplados con fuertes interacciones entre ellos. En modelación geomecánica es importante distinguir el comportamiento hidráulico del medio poroso del de las discontinuidades, ambas generando un sistema de doble permeabilidad en el cual el medio poroso proporciona una pequeña permeabilidad al sistema, mientras que las discontinuidades establecen caminos preferentes y proporcionan gran permeabilidad al mismo. Debido a las elevadas velocidades de fluido que se pueden desarrollar en las discontinuidades, la advección (transporte) puede ser el modo dominante de transferencia de calor. Por ello, el estudio de procesos THM acoplados con advección térmica en discontinuidades es importante en problemas con un cierto grado de acoplamiento entre los campos mecánico, hidráulico y térmico, y en los cuales el flujo hidráulico puede transportar calor a gran velocidad a través de las discontinuidades. Por ello, es importante establecer un modelo numérico para estudiar el fenómeno advectivo que diferencie la contribución de la red de discontinuidades de la del medio continuo poroso. En este contexto, esta tesis está enfocada en el estudio, formulación, implementación numérica y verificación de un modelo THM acoplado monolítico con advección dominante que sea capaz de reproducir el comportamiento advectivo que ocurre en discontinuidades o fracturas, en las cuales el fluido transporta calor. Este estudio se lleva a cabo en el contexto geomecánico de un medio poroso fracturado, empleando el método de los elementos finitos (FEM) con elementos junta de espesor nulo para representar las discontinuidades o fracturas, suponiendo condiciones saturadas, un único fluido incompresible (con densidad constante) y pequeñas deformaciones. También se supone que todo el comportamiento no lineal se desarrolla en las juntas mediante el uso de una ley constitutiva elasto-plástica basada en mecánica de fractura, mientras que el medio continuo poroso se supone de comportamiento poro-elástico. Adicionalmente, la solución numérica del problema térmico advectivo presenta singularidades con respecto a los problemas de difusión pura. Cuando las velocidades del fluido son bajas, la formulación numérica se puede llevar a cabo mediante Elementos Finitos tradicionales (Galerkin). No obstante, cuando las velocidades del fluido son suficientemente elevadas y la advección domina el problema el método estándar de Galerkin conduce a resultados oscilantes, por lo que el término advectivo requiere un tratamiento especial para estabilizar la solución numérica. En este contexto, se presenta una revisión de diferentes metodologías para resolver el problema de advección dominante, seleccionando el método Streamline Upwind Petrov-Galerkin (SUPG) para resolver el problema en régimen permanente, un método bien conocido que conduce a soluciones estables con advección dominante. Para el régimen transitorio esta tesis empieza con el estudio del método de Características Galerkin explícito, un método existente en el que el fenómeno advectivo se estudia de modo Lagrangiano, siguiendo la partícula (o calor) con el movimiento del fluido, y estableciendo para ello un sistema de coordenadas móvil que depende de la velocidad del fluido y de su posición en el tiempo. Seguidamente se desarrolla la forma implícita de este método, y finalmente se propone una nueva variación del método, añadiendo un parámetro 𝛼�𝛼� que permite determinar diferentes posiciones de las derivadas temporales del volumen advectivo, concluyendo en el nuevo 𝛼�𝛼�-Implicit Characteristic Galerkin Method. Con esta nueva metodología se estabiliza el problema de gran advección en régimen transitorio si se cumple la condición de Courant. Con el fin de verificar el modelo THM monolítico acoplado con advección dominante se presentan diversos ejemplos de verificación, tanto para medio continuo poroso como para elementos junta de espesor nulo. Finalmente, se presenta un caso de aplicación a fractura hidráulica (HF), llevando a cabo el análisis numérico de una sola fractura en 2-D con el objetivo de entender los mecanismos térmicos que ocurren en problemas de HF y como éstos afectan sobre los comportamientos mecánico e hidráulico. Además, los resultados de la modelación se comparan con los obtenidos empleando un modelo HM, en el cual no se consideran efectos térmicos. Adicionalmente, con el objetivo de mejorar la eficiencia computacional del código de Elementos Finitos, se ha llevado a cabo la paralelización del mismo mediante una estrategia de partición de subdominios, resultando en una mejora sustancial de la velocidad de los cálculos y mostrando una buena escalabilidad de los mismos.
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Demichel, Sylvain. "Transistors bipolaires à hétérojonction à collecteur métallique (M. H. B. T. ) à base fine : réalisation technologique dans la filière InP/InGaAs et caractérisation". Paris 6, 2001. http://www.theses.fr/2001PA066545.

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Boucherie, Joël. "Modélisation des transferts thermiques et solutaux lors de la croissance cristalline de CdTe dans te par la méthode T. H. M. Expérience AMF 117-eureca 1". Bordeaux 1, 1991. http://www.theses.fr/1991BOR10624.

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L'etude numerique des mouvements de la phase fluide et de leur interaction sur le processus de croissance de monocristaux de cdte par t. H. M. Est effectuee par une methode de volumes finis. Nous avons integre a la convection thermique l'aspect convectif d'origine solutal. Dans les conditions aux limites, deux types de frontieres actives (interfaces fluide-solide) et non-actives (parois de l'ampoule) sont integres. Apres avoir determine les grandeurs caracteristiques adimensionnelles, des resultats sont presentes en configuration simplifiee de la zone fluide delimitee par des interfaces planes et rigides dans une premiere partie et dans l'ampoule entiere dans une seconde partie. Nous mettons alors en evidence des phenomenes convectifs oscillatoires periodiques
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Keil, Claudia [Verfasser], M. T. [Akademischer Betreuer] Stubbs, H. J. [Akademischer Betreuer] Mägert i G. [Akademischer Betreuer] Fischer. "Molekularbiologische Untersuchungen zur Bedeutung von Kallikreinen und Serinproteinase-Inhibitoren für die Entstehung von Hautkrankheiten und Allergien / Claudia Keil. Betreuer: M. T. Stubbs ; H.-J. Mägert ; G. Fischer". Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2012. http://d-nb.info/1027703275/34.

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Gan, Liping. "A study of the sensitivity of the H dibaryon search experiment E813 at BNL through ([Sigma]§-,p)[subscript]a[subscript]t[subscript]o[subscript]m -> [Lambda] + n". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0004/NQ31982.pdf.

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Książki na temat "Magnetisation M(T,H)"

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Boatner, E. B. M-o-t-h-e-r spells murder. Bloomington, IN: iUniverse, Inc., 2012.

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Shiʻr Manṣūr al-Namarī, t. 193 H/808 M. al-Qāhirah: Maktabat al-Ādāb, 2003.

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ʻAttābī, Kulthūm ibn ʻAmr, d. 823., red. Kulthūm ibn ʻAmr al-ʻAttābī, t 220 H-835 M. [Riyadh]: M.b.S. Ibn Ḥusayn, 1986.

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Ḥanṭūr, Maḥmūd Muḥammad. al-Naskh ʻinda al-Fakhr al-Rāzī, t. 606 H=1210 H [i.e. M]. al-Qāhirah: Maktabat al-Ādāb, 2002.

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Waḥdat al-wujūd ʻinda Ibn ʻArabī, t 638 H/1240 M. Tūnis: Dār Jawīrū lil-Khidmāt al-Lughawīyah, 2002.

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Baṣarī, Yaḥyá ibn Saʻīd. Maqāmāt Ibn Mārī: Nasabuh - ḥayātuh - makānatuh, T 589 H/1193 M. Bayrūt: al-Dār al-ʻArabīyah lil-Mawsūʻāt, 2019.

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Murādī, Muḥammad ibn al-Ḥasan, -1096?, red. ʻAqīdat Abī Bakr al-Murādī al-Ḥaḍramī (T 489 H-1106 M [sic]). Tiṭwān: Markaz Abī al-Ḥasan al-Ashʻarī lil-Dirāsāt wa-al-Buḥūth al-ʻAqadīyah, al-Rābiṭah al-Muḥammadīyah lil-ʻUlamāʼ, 2012.

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Aḥmad ibn Muḥammad Ibn Zakrī. Bughyat al-ṭālib fī sharḥ ʻAqīdat Ibn al-Ḥājib, t 646 H / 1249 M. al-Jazāʼir: Dār al-Khaldūnīyah lil-Nashr wa-al-Tawzīʻ, 2013.

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editor, Saʻdīyīn Muḥammad, red. Fihris Aḥmad ibn ʻĀshir al-Ḥāfī, al-Sallāwī, t. ʻām 1163 H/49-1750 M. Salā: al-Majālis al-ʻIlmīyah li-Jihat al-Rabāṭ, 2018.

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al-Imām Maḥmūd Khaṭṭāb al-Subkī wa-makānatahu al-fiqhīyah, t 1352 H/1933 M. Madīnat Naṣr, al-Qāhirah: Dār al-Baṣāʼir, 2011.

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Części książek na temat "Magnetisation M(T,H)"

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Seifert, Christian, Sascha Trostorff i Marcus Waurick. "Non-Autonomous Evolutionary Equations". W Evolutionary Equations, 259–73. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-89397-2_16.

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AbstractPreviously, we focussed on evolutionary equations of the form $$\displaystyle \left (\overline {\partial _{t,\nu }M(\partial _{t,\nu })+A}\right )U=F. $$ ∂ t , ν M ( ∂ t , ν ) + A ¯ U = F . In this chapter, where we turn back to well-posedness issues, we replace the material law operator M(∂t,ν), which is invariant under translations in time, by an operator of the form $$\displaystyle \mathcal {M}+\partial _{t,\nu }^{-1}\mathcal {N}, $$ ℳ + ∂ t , ν − 1 N , where both $$\mathcal {M}$$ ℳ and $$\mathcal {N}$$ N are bounded linear operators in $$L_{2,\nu }(\mathbb {R};H)$$ L 2 , ν ( ℝ ; H ) . Thus, it is the aim in the following to provide criteria on $$\mathcal {M}$$ ℳ and $$\mathcal {N}$$ N under which the operator $$\displaystyle \partial _{t,\nu }\mathcal {M}+\mathcal {N}+A $$ ∂ t , ν ℳ + N + A is closable with continuous invertible closure in $$L_{2,\nu }(\mathbb {R};H)$$ L 2 , ν ( ℝ ; H ) . In passing, we shall also replace the skew-selfadjointness of A by a suitable real part condition. Under additional conditions on $$\mathcal {M}$$ ℳ and $$\mathcal {N}$$ N , we will also see that the solution operator is causal. Finally, we will put the autonomous version of Picard’s theorem into perspective of the non-autonomous variant developed here.
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Seifert, Christian, Sascha Trostorff i Marcus Waurick. "Maximal Regularity". W Evolutionary Equations, 243–58. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-89397-2_15.

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AbstractIn this chapter, we address the issue of maximal regularity. More precisely, we provide a criterion on the ‘structure’ of the evolutionary equation $$\displaystyle \left (\overline {\partial _{t,\nu }M(\partial _{t,\nu })+A}\right )U=F $$ ∂ t , ν M ( ∂ t , ν ) + A ¯ U = F in question and the right-hand side F in order to obtain $$U\in \operatorname {dom}(\partial _{t,\nu }M(\partial _{t,\nu }))\cap \operatorname {dom}(A)$$ U ∈ dom ( ∂ t , ν M ( ∂ t , ν ) ) ∩ dom ( A ) . If $$F\in L_{2,\nu }(\mathbb {R};H)$$ F ∈ L 2 , ν ( ℝ ; H ) , $$U\in \operatorname {dom}(\partial _{t,\nu }M(\partial _{t,\nu }))\cap \operatorname {dom}(A)$$ U ∈ dom ( ∂ t , ν M ( ∂ t , ν ) ) ∩ dom ( A ) is the optimal regularity one could hope for. However, one cannot expect U to be as regular since $$\left (\partial _{t,\nu }M(\partial _{t,\nu })+A\right )$$ ∂ t , ν M ( ∂ t , ν ) + A is simply not closed in general. Hence, in all the cases where $$\left (\partial _{t,\nu }M(\partial _{t,\nu })+A\right )$$ ∂ t , ν M ( ∂ t , ν ) + A is not closed, the desired regularity property does not hold for $$F\in L_{2,\nu }(\mathbb {R};H)$$ F ∈ L 2 , ν ( ℝ ; H ) . However, note that by Picard’s theorem, $$F\in \operatorname {dom}(\partial _{t,\nu })$$ F ∈ dom ( ∂ t , ν ) implies the desired regularity property for U given the positive definiteness condition for the material law is satisfied and A is skew-selfadjoint. In this case, one even has $$U\in \operatorname {dom}(\partial _{t,\nu })\cap \operatorname {dom}(A)$$ U ∈ dom ( ∂ t , ν ) ∩ dom ( A ) , which is more regular than expected. Thus, in the general case of an unbounded, skew-selfadjoint operator A neither the condition $$F\in \operatorname {dom}(\partial _{t,\nu })$$ F ∈ dom ( ∂ t , ν ) nor $$F\in L_{2,\nu }(\mathbb {R};H)$$ F ∈ L 2 , ν ( ℝ ; H ) yields precisely the regularity $$U\in \operatorname {dom}(\partial _{t,\nu }M(\partial _{t,\nu }))\cap \operatorname {dom}(A)$$ U ∈ dom ( ∂ t , ν M ( ∂ t , ν ) ) ∩ dom ( A ) since $$\displaystyle \operatorname {dom}(\partial _{t,\nu })\cap \operatorname {dom}(A)\subseteq \operatorname {dom}(\partial _{t,\nu }M(\partial _{t,\nu }))\cap \operatorname {dom}(A)\subseteq \operatorname {dom}(\overline {\partial _{t,\nu }M(\partial _{t,\nu })+A}), $$ dom ( ∂ t , ν ) ∩ dom ( A ) ⊆ dom ( ∂ t , ν M ( ∂ t , ν ) ) ∩ dom ( A ) ⊆ dom ( ∂ t , ν M ( ∂ t , ν ) + A ¯ ) , where the inclusions are proper in general. It is the aim of this chapter to provide an example case, where less regularity of F actually yields more regularity for U. If one focusses on time-regularity only, this improvement of regularity is in stark contrast to the general theory developed in the previous chapters. Indeed, in this regard, one can coin the (time) regularity asserted in Picard’s theorem as “U is as regular as F”. For a more detailed account on the usual perspective of maximal regularity (predominantly) for parabolic equations, we refer to the Comments section of this chapter.
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Seifert, Christian, Sascha Trostorff i Marcus Waurick. "Differential Algebraic Equations". W Evolutionary Equations, 149–65. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-89397-2_10.

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AbstractLet H be a Hilbert space and $$\nu \in \mathbb {R}$$ ν ∈ ℝ . We saw in the previous chapter how initial value problems can be formulated within the framework of evolutionary equations. More precisely, we have studied problems of the form $$\displaystyle \begin{aligned} \begin {cases} \left (\partial _{t,\nu }M_{0}+M_{1}+A\right )U=0 & \text{ on }\left (0,\infty \right ),\\ M_{0}U(0{\scriptstyle {+}})=M_{0}U_{0} \end {cases} \end{aligned} $$ ∂ t , ν M 0 + M 1 + A U = 0 on 0 , ∞ , M 0 U ( 0 + ) = M 0 U 0 for U0 ∈ H, M0, M1 ∈ L(H) and $$A\colon \operatorname {dom}(A)\subseteq H\to H$$ A : dom ( A ) ⊆ H → H skew-selfadjoint; that is, we have considered material laws of the form $$\displaystyle M(z)\mathrel{\mathop:}= M_{0}+z^{-1}M_{1}\quad (z\in \mathbb {C}\setminus \{0\}). $$ M ( z ) : = M 0 + z − 1 M 1 ( z ∈ ℂ ∖ { 0 } ) .
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Seifert, Christian, Sascha Trostorff i Marcus Waurick. "Initial Value Problems and Extrapolation Spaces". W Evolutionary Equations, 131–48. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-89397-2_9.

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AbstractUp until now we have dealt with evolutionary equations of the form $$\displaystyle \big (\overline {\partial _{t,\nu }M(\partial _{t,\nu })+A}\big )U=F $$ ( ∂ t , ν M ( ∂ t , ν ) + A ¯ ) U = F for some given $$F\in L_{2,\nu }(\mathbb {R};H)$$ F ∈ L 2 , ν ( ℝ ; H ) for some Hilbert space H, a skew-selfadjoint operator A in H and a material law M defined on a suitable half-plane satisfying an appropriate positive definiteness condition with $$\nu \in \mathbb {R}$$ ν ∈ ℝ chosen suitably large. Under these conditions, we established that the solution operator, "Equation missing", is eventually independent of ν and causal; that is, if F = 0 on $$\left (-\infty ,a\right ]$$ − ∞ , a for some $$a\in \mathbb {R}$$ a ∈ ℝ , then so too is U.
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Seifert, Christian, Sascha Trostorff i Marcus Waurick. "Evolutionary Inclusions". W Evolutionary Equations, 275–97. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-89397-2_17.

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AbstractThis chapter is devoted to the study of evolutionary inclusions. In contrast to evolutionary equations, we will replace the skew-selfadjoint operator A by a so-called maximal monotone relation A ⊆ H × H in the Hilbert space H. The resulting problem is then no longer an equation, but just an inclusion; that is, we consider problems of the form $$\displaystyle (u,f)\in \overline {\partial _{t,\nu }M(\partial _{t,\nu })+A}, $$ ( u , f ) ∈ ∂ t , ν M ( ∂ t , ν ) + A ¯ , where $$f\in L_{2,\nu }(\mathbb {R};H)$$ f ∈ L 2 , ν ( ℝ ; H ) is given and $$u\in L_{2,\nu }(\mathbb {R};H)$$ u ∈ L 2 , ν ( ℝ ; H ) is to be determined. This generalisation allows the treatment of certain non-linear problems, since we will not require any linearity for the relation A. Moreover, the property that A is just a relation and not neccessarily an operator can be used to treat hysteresis phenomena, which for instance occur in the theory of elasticity and electro-magnetism.
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Seifert, Christian, Sascha Trostorff i Marcus Waurick. "Exponential Stability of Evolutionary Equations". W Evolutionary Equations, 167–88. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-89397-2_11.

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AbstractIn this chapter we study the exponential stability of evolutionary equations. Roughly speaking, exponential stability of a well-posed evolutionary equation $$\displaystyle \left (\partial _{t,\nu }M(\partial _{t,\nu })+A\right )U=F $$ ∂ t , ν M ( ∂ t , ν ) + A U = F means that exponentially decaying right-hand sides F lead to exponentially decaying solutions U. The main problem in defining the notion of exponential decay for a solution of an evolutionary equation is the lack of continuity with respect to time, so a pointwise definition would not make sense in this framework. Instead, we will use our exponentially weighted spaces $$L_{2,\nu }(\mathbb {R};H)$$ L 2 , ν ( ℝ ; H ) , but this time for negative ν, and define the exponential stability by the invariance of these spaces under the solution operator associated with the evolutionary equation under consideration.
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Han, Wenbin, Zechuan Guan, Shanfang Huang i Jian Deng. "Multi-physics Coupling Analyses of Nuclear Thermal Propulsion Reactor". W Springer Proceedings in Physics, 941–54. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1023-6_80.

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AbstractNuclear thermal propulsion (NTP) reactors have high-temperature solid-state characteristics and significant thermal expansion, which therefore require multi-physics coupling analyses. In this paper, the framework of Neutronics, Thermal-Hydraulics and Mechanics coupling (N/T-H/M) of nuclear thermal propulsion reactor is developed, and the typical reactor XE-2 is analyzed with this method. The results show that the N/T-H/M coupling will bring -1049 pcm negative reactivity, of which the thermal expansion effect accounts for 22%, indicating that the nuclear thermal propulsion reactor has a certain capacity for self-regulation. However, thermal expansion will lead to 0.88 mm peak deformation and 233 MPa peak stress, which will severely threaten the mechanical tolerance of the materials. Therefore, there is a trade-off between the advantages and disadvantages of the high-temperature solid-state core while designing NTP reactors.
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Carley, Paul, i Inger M. Mees. "The familiar consonants /p b t d k ɡ f v s z h m n w l r/ and the vowels /ɪ æ ɛ ə ʊ/". W American English Phonetic Transcription, 3–8. Abingdon, Oxon; New York, NY: Routledge, 2021.: Routledge, 2021. http://dx.doi.org/10.4324/9781003008088-2.

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Carley, Paul, i Inger M. Mees. "The familiar consonants /p b t d k ɡ f v s z h m n w l r/ and the vowels /ɪ æ e ɒ ʌ ʊ/". W British English Phonetic Transcription, 3–8. Abingdon, Oxon; New York, N.Y.: Routledge, 2021.: Routledge, 2021. http://dx.doi.org/10.4324/9781003007890-2.

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Malisch, Wolfgang, Klaus Grün, Heinrich Jehle, Joachim Reising, Stephan Möller, Oliver Fey i Christa Abdelbaky. "Metal Mediated Synthesis of Chiral Secondary Phosphane Ligands via the Organophosphenium Complexes Cp(OC)(L)M=P(H)R (M = Mo, W; L = OC, Me3P; R = t-Bu, Mes). Regiospecific Functionalization of Iron and Ruthenium Substituted Disilanes". W Selective Reactions of Metal-Activated Molecules, 257–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-00975-8_39.

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Streszczenia konferencji na temat "Magnetisation M(T,H)"

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Haoyang Wang. "Empirical study on the performance of T-M and H-M model-based China open-ended funds". W 2011 International Conference on Management Science and Industrial Engineering (MSIE). IEEE, 2011. http://dx.doi.org/10.1109/msie.2011.5707551.

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Jaesik Lee, Y. Baeyens, J. Weiner i Young-Kai Chen. "A 50GS/s Distributed T/H Amplifier in 0.18μm SiGe BiCMOS". W 2007 IEEE International Solid-State Circuits Conference. IEEE, 2007. http://dx.doi.org/10.1109/isscc.2007.373496.

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Meyer, Thorsten, Kyra Jantschik i Oliver Czaikoski. "Investigation of T-H-M-C Processes on Sealing Systems in Rock Salt". W Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.1791.

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Meyer, Thorsten, Oliver Czaikowski i Kyra Jantschik. "Investigation of T-H-M-C processes on sealing systems in rock salt". W Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.8578.

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Nilsson, Anders, Eric Tell i Dake Liu. "An 11mm2 70mW Fully-Programmable Baseband Processor for Mobile WiMAX and DVB-T/H in 0.12¿m CMOS". W 2008 International Solid-State Circuits Conference - (ISSCC). IEEE, 2008. http://dx.doi.org/10.1109/isscc.2008.4523159.

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Earley, Rebecca. "A New ‘T’ for Textiles: Up skilling design researchers to inspire Buying Office staff towards sustainability at Hennes and Mauritz (H&M)". W European Academy of Design Conference Proceedings 2015. Sheffield Hallam University, 2016. http://dx.doi.org/10.7190/ead/2015/56.

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Quitmann, S. "Von Gewissheiten zu Ungewissheiten in der Psychosomatik der Reproduktionsmedizin – ein historischer Überblick von H. Deutsch über M. Stauber zu B. Strauß und T. Wischmann". W Kontroversen und Gewissheiten in der Psychosomatischen Frauenheilkunde. Georg Thieme Verlag KG, 2018. http://dx.doi.org/10.1055/s-0038-1622767.

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MIKŠA, Ovidijus, i Ligita BALEŽENTIENĖ. "С BUDGET IN THE AGROECOSYSTEMS OF MAIZE (ZEA MAYS L.) AND RAPESEED (BRASSICA NAPUS L.)". W Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.036.

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The aim of this research was to calculate and compare the C budget changes for maize (Zea mays L.) and rapeseed (Brassica napus L.), identifying soil seasonal respiratory CO2 (Ra+h) and assimilated photosynthetic CO2 at plant different growth stages. The research was carried out for maize (Zea mays L.) and rapeseed (Brassica napus L.), during the vegetation period (2014 June – September) at the PI ASU Training Farm, Kaunas district. The mean soil CO2 emissions were 1.971±0.12 μmol m-2s-1 for maize, and 2.199±0.25 μmol m-2s-1 for rapeseed. The highest measured soil CO2 emissions 2.432±0.23 μmol m-2s-1 for rapeseed in June, and 2. 963±0.28 μmol m-2s-1 for the maize in the second half of July. The mean C budget in maize agro-ecosystems was 15.54 t ha-1, while it was 10.30 t ha-1 in rapeseed.
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Zhao, Wenbin, Junping Si, Liang Zhang, Sheng Sun, Wenhua Yang, Shuai Jin, Jin Lei i Hao Liu. "Study and Development of Irradiation Test Device for Fuel Rods In Research Reactor". W 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-90997.

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Abstract For the purpose of performing high-temperature irradiation of the fuel rod in the low-temperature and low-pressure water-cooled research reactor and obtaining the post-irradiation performance parameters of the fuel rod, a fuel rod irradiation test device was designed based on the High Flux Engineering Test Reactor (HFETR). The key parameters such as thickness of the lead-bismuth eutectic (LBE) alloy layer, structure of the cooling water flow channel, the structure of throttle plug, and flow rate of the cooling water were determined. The flow field distribution in the test section was obtained by numerical simulation method. The stress values of the device under design and accident conditions were obtained by finite element analysis. The test of hydraulic characteristic out-reactor were performed by using the simulation device. The results show that, the average velocity of the cooling water outside the test assembly was 1.9 m/s under the design flow rate, which met the cooling requirement when the linear power of the fuel rod was 280 W/cm. The structure of the test device met the strength requirement with sufficient safety margin. In the experiment out-reactor, the test device was able to cover the design value of 4.03 t/h on the differential pressure of 200 kPa and 300 kPa with coolant flow rate adjustment ranges of 0.73 t/h ∼ 4.28 t/h and 1.05 t/h ∼ 5.25 t/h, which met the test requirements. The device designed in this paper can be used to perform the irradiation test in research reactor, which provides guarantee for the research and development of new type of the fuel.
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Abe, Fujio. "Creep Deformation Parameters and Creep Life of Gr.91". W ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97319.

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The correlation between the creep deformation parameters and creep life has been investigated for Gr.91 by analyzing creep strain data at 450 to 725 °C, 40 to 450 MPa and tr = 11.4 to 68,755 h in the NIMS Creep Data Sheet. The creep life tr is correlated with the time to minimum creep rate tm as t r = 3.7 t m . Taking the stress dependence of tm / tr into account, the creep life could be predicted more reliably. The minimum creep rate ε̇min depends on both the tm and the strain to minimum creep rate εm as ε . min = 0.54 ε m / t m . The εm is evaluated to be 0.02 to 0.03 at high stresses at each temperature but it decreases with decreasing stress at temperatures above 550 °C, suggesting that the creep deformation in the transient region becomes more inhomogeneous with decreasing stress probably due to localized creep deformation within 1 μm in the vicinity of prior austenite grain boundaries. The downward deviation takes place in the the tr versus ε̇min curves (Monkman-Grant plot). At the same ε̇min, both the εm and tm change upon the condition of tm ∝ εm as can be seen from the above equation. The decrease in εm with decreasing stress, corresponding to decreasing ε̇min, causes a decrease in tm, indicating the downward deviation of the tr versus ε̇min curves.
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Raporty organizacyjne na temat "Magnetisation M(T,H)"

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De Varela, Ana Lorena, i Silvia Martínez Álvarez. Aprendamos todos a leer: Fascículo 26: Toda la familia lee y escribe conmigo. Banco Interamericano de Desarrollo, kwiecień 2022. http://dx.doi.org/10.18235/0004051.

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Aprendamos Todos a Leer es la iniciativa para la enseñanza de lectura y escritura inicial del BID, donde a través de materiales para el alumno, el maestro y el aula de clase, pretende brindar herramientas para apoyar el proceso de alfabetización inicial. El programa se organiza a partir de una cartelera fonológica presentando para cada fonema (sonido de letra) un personaje caracterizado por un animal. En respuesta al COVID-19, se desarrollaron fascículos para apoyar el trabajo en casa. Este fascículo contiene orientaciones para enseñar la escritura de la letra H-h, su combinación con las vocales y las consonantes M-m, P-p, N-n, L-l, S-s, F-f, T-t, B-b, D-d, C-c, QU-qu, V-v, Y-y, Ll-ll.
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De Varela, Ana Lorena, i Silvia Martínez Álvarez. Aprendamos todos a leer: Fascículo 28: Toda la familia lee y escribe conmigo. Inter-American Development Bank, kwiecień 2022. http://dx.doi.org/10.18235/0004053.

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Aprendamos Todos a Leer es la iniciativa para la enseñanza de lectura y escritura inicial del BID, donde a través de materiales para el alumno, el maestro y el aula de clase, pretende brindar herramientas para apoyar el proceso de alfabetización inicial. El programa se organiza a partir de una cartelera fonológica presentando para cada fonema (sonido de letra) un personaje caracterizado por un animal. En respuesta al COVID-19, se desarrollaron fascículos para apoyar el trabajo en casa. Este fascículo contiene orientaciones para enseñar el sonido y escritura de la letra R-r, su combinación con las vocales y las consonantes M-m, P-p, N-n, L-l, S-s, F-f, T-t, B-b, D-d, C-c, QU-qu, V-v, Ll-ll, Y-y, H-h, Ch-ch.
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De Varela, Ana Lorena, i Silvia Martínez Álvarez. Aprendamos todos a leer: Fascículo 27: Toda la familia lee y escribe conmigo. Inter-American Development Bank, maj 2022. http://dx.doi.org/10.18235/0004052.

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Aprendamos Todos a Leer es la iniciativa para la enseñanza de lectura y escritura inicial del BID, donde a través de materiales para el alumno, el maestro y el aula de clase, pretende brindar herramientas para apoyar el proceso de alfabetización inicial. El programa se organiza a partir de una cartelera fonológica presentando para cada fonema (sonido de letra) un personaje caracterizado por un animal. En respuesta al COVID-19, se desarrollaron fascículos para apoyar el trabajo en casa. Este fascículo contiene orientaciones para enseñar el sonido y escritura de la letra Ch-ch, su combinación con las vocales y las consonantes M-m, P-p, N-n, L-l, S-s, F-f, T-t, B-b, D-d, C-c, QU-qu, V-v, Ll-ll, Y-y, H-h.
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De Varela, Ana Lorena, i Silvia Martínez Álvarez. Aprendamos todos a leer: Fascículo 31: Toda la familia lee y escribe conmigo. Inter-American Development Bank, grudzień 2021. http://dx.doi.org/10.18235/0004054.

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Aprendamos Todos a Leer es la iniciativa para la enseñanza de lectura y escritura inicial del BID, donde a través de materiales para el alumno, el maestro y el aula de clase, pretende brindar herramientas para apoyar el proceso de alfabetización inicial. El programa se organiza a partir de una cartelera fonológica presentando para cada fonema (sonido de letra) un personaje caracterizado por un animal. En respuesta al COVID-19, se desarrollaron fascículos para apoyar el trabajo en casa. Este fascículo contiene orientaciones para enseñar el sonido y escritura del dígrago Gu-gu, su combinación con las vocales y las consonantes M-m, P-p, N-n, L-l, S-s, F-f, T-t, B-b, D-d, C-c, QU-qu, V-v, Ll-ll, Y-y, H-h, Ch-ch, R-r, G-g.
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De Varela, Ana Lorena, i Silvia Martínez Álvarez. Aprendamos todos a leer: Fascículo 32: Toda la familia lee y escribe conmigo. Banco Interamericano de Desarrollo, kwiecień 2022. http://dx.doi.org/10.18235/0004034.

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Aprendamos Todos a Leer es la iniciativa para la enseñanza de lectura y escritura inicial del BID, donde a través de materiales para el alumno, el maestro y el aula de clase, pretende brindar herramientas para apoyar el proceso de alfabetización inicial. El programa se organiza a partir de una cartelera fonológica presentando para cada fonema (sonido de letra) un personaje caracterizado por un animal. En respuesta al COVID-19, se desarrollaron fascículos para apoyar el trabajo en casa. Este fascículo contiene orientaciones para enseñar el sonido y escritura de la letra J-j, su combinación con las vocales y las consonantes M-m, P-p, N-n, L-l, S-s, F-f, T-t, B-b, D-d, C-c, QU-qu, V-v, Ll-ll, Y-y, H-h, Ch-ch, R-r, Gu-gu.
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De Varela, Ana Lorena, i Silvia Martínez Álvarez. Aprendamos todos a leer: fascículo 37: toda la familia lee y escribe conmigo. Banco Interamericano de Desarrollo, kwiecień 2022. http://dx.doi.org/10.18235/0004024.

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Aprendamos Todos a Leer es la iniciativa para la enseñanza de lectura y escritura inicial del BID, donde a través de materiales para el alumno, el maestro y el aula de clase, pretende brindar herramientas para apoyar el proceso de alfabetización inicial. El programa se organiza a partir de una cartelera fonológica presentando para cada fonema (sonido de letra) un personaje caracterizado por un animal. En respuesta al COVID-19, se desarrollaron fascículos para apoyar el trabajo en casa. Este fascículo los niños podrán realizar diferentes actividades para conocer el sonido de la letra -ñ. Les ayudaremos a combinarlas con las vocales y las consonantes y las consonantes M-m, P-p, N-n, L-l, S-s, F-f, T-t, B-b, D-d, C-c, QU-qu, Y-y, Ll-ll, H-h, Ch-ch, R-r, G-g, J-j, Z-z.
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De Varela, Ana Lorena, i Silvia Martínez Álvarez. Aprendamos todos a leer: fascículo 38: toda la familia lee y escribe conmigo. Banco Interamericano de Desarrollo, kwiecień 2022. http://dx.doi.org/10.18235/0004025.

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Aprendamos Todos a Leer es la iniciativa para la enseñanza de lectura y escritura inicial del BID, donde a través de materiales para el alumno, el maestro y el aula de clase, pretende brindar herramientas para apoyar el proceso de alfabetización inicial. El programa se organiza a partir de una cartelera fonológica presentando para cada fonema (sonido de letra) un personaje caracterizado por un animal. En respuesta al COVID-19, se desarrollaron fascículos para apoyar el trabajo en casa. Este fascículo los niños podrán realizar diferentes actividades para conocer el sonido y la escritura de la letra K-k. Les ayudaremos a combinarlas con las vocales y las consonantes y las consonantes M-m, P-p, N-n, L-l, S-s, F-f, T-t, B-b, D-d, C-c, QU-qu, Y-y, Ll-ll, H-h, Ch-ch, R-r, G-g, J-j, Z-z, -ñ.
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De Varela, Ana Lorena, i Silvia Martínez Álvarez. Aprendamos todos a leer: Fascículo 33: Toda la familia lee y escribe conmigo. Banco Interamericano de Desarrollo, kwiecień 2023. http://dx.doi.org/10.18235/0004033.

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Aprendamos Todos a Leer es la iniciativa para la enseñanza de lectura y escritura inicial del BID, donde a través de materiales para el alumno, el maestro y el aula de clase, pretende brindar herramientas para apoyar el proceso de alfabetización inicial. El programa se organiza a partir de una cartelera fonológica presentando para cada fonema (sonido de letra) un personaje caracterizado por un animal. En respuesta al COVID-19, se desarrollaron fascículos para apoyar el trabajo en casa. Este fascículo los niños podrán realizar diferentes actividades para conocer el sonido J-j de la letra G-g cuando se escribe con las vocales e, i: Ge-ge y Gi-gi. Les ayudaremos a leer palabras que también tienen las vocales a, o, u y las consonantes y las consonantes M-m, P-p, N-n, L-l, S-s, F-f, T-t, B-b, D-d, C-c, QU-qu, V-v, Ll-ll, Y-y, H-h, Ch-ch, R-r, G-g.
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De Varela, Ana Lorena, i Silvia Martínez Álvarez. Aprendamos todos a leer: fascículo 36: toda la familia lee y escribe conmigo. Banco Interamericano de Desarrollo, kwiecień 2022. http://dx.doi.org/10.18235/0004023.

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Aprendamos Todos a Leer es la iniciativa para la enseñanza de lectura y escritura inicial del BID, donde a través de materiales para el alumno, el maestro y el aula de clase, pretende brindar herramientas para apoyar el proceso de alfabetización inicial. El programa se organiza a partir de una cartelera fonológica presentando para cada fonema (sonido de letra) un personaje caracterizado por un animal. En respuesta al COVID-19, se desarrollaron fascículos para apoyar el trabajo en casa. Este fascículo los niños podrán realizar diferentes actividades para conocer el sonido /s/ cuando se escribe con la letra Z-z. Les ayudaremos a combinarlas con las vocales a, o, u y las consonantes y las consonantes M-m, P-p, N-n, L-l, S-s, F-f, T-t, B-b, D-d, C-c, QU-qu, Y-y, Ll-ll, H-h, Ch-ch, R-r, G-g, J-j.
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De Varela, Ana Lorena, i Silvia Martínez Álvarez. Aprendamos todos a leer: fascículo 35: toda la familia lee y escribe conmigo. Banco Interamericano de Desarrollo, kwiecień 2022. http://dx.doi.org/10.18235/0004022.

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Aprendamos Todos a Leer es la iniciativa para la enseñanza de lectura y escritura inicial del BID, donde a través de materiales para el alumno, el maestro y el aula de clase, pretende brindar herramientas para apoyar el proceso de alfabetización inicial. El programa se organiza a partir de una cartelera fonológica presentando para cada fonema (sonido de letra) un personaje caracterizado por un animal. En respuesta al COVID-19, se desarrollaron fascículos para apoyar el trabajo en casa. Este fascículo los niños podrán realizar diferentes actividades para conocer el sonido /S-s/ de la letra C cuando se escribe con las vocales e, i: Ce-ce y Ci-ci. Les ayudaremos a combinarlas con las vocales a, o, u y las consonantes y las consonantes M-m, P-p, N-n, L-l, S-s, F-f, T-t, B-b, D-d, C-c, QU-qu, Y-y, Ll-ll, H-h, Ch-ch, R-r, G-g, J-j.
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