161,004 research outputs found
Preis-Liste XII: Mikro-Wage nach Nernst - Micro-balance after Professor Dr. W. Nernst - Micro-balance construite d'après les principes de Monsieur le Dr. Ernst
No full textPREIS-LISTE XII: MIKRO-WAGE NACH NERNST - MICRO-BALANCE AFTER PROFESSOR DR. W. NERNST - MICRO-BALANCE CONSTRUITE D'APRÈS LES PRINCIPES DE MONSIEUR LE DR. ERNST
Brenni, Paolo. Istituto e Museo di Storia della Scienza, Firenze: Trade Catalogues (-)
Preis-Liste XII: Mikro-Wage nach Nernst - Micro-balance after Professor Dr. W. Nernst - Micro-balance construite d'après les principes de Monsieur le Dr. Ernst (a0001
A comparison of the Nernst-Planck and Maxwell-Stefan approaches to modelling multicomponent charge transport in electrolyte solutions
No full textAn understanding of charge transport in electrolytic solutions is of vital importance in the modelling and simulation of electrochemically and photoelectrochemically active porous media. To this end, we present two multicomponent charge transport models for an electrolyte system based on the generalized Maxwell-Stefan equations and the dilute solution Nernst-Planck equations. These transport models are used to develop two further models of a simple electrochemical cell consisting of ideally polarizable metal electrodes and a binary electrolyte. The results from the numerical solution of these Maxwell-Stefan and Nernst-Planck models are compared for a range of electrolyte concentrations and the applicability of each model approach is discussed
Handbuch der anorganischen chemie : Unter mitwirkung von dr. Gadebusch, dr. Haitinger, dr. Lorenz, prof. dr. Nernst, dr. Philipp, prof. dr. Schellbach, prof. dr. von Sommaruga, dr. Stavenhagen, prof. dr. Zeisel, hrsg. von dr. O. Dammer.
No full textVol. 4 has title: Handbuch der anorganischen chemie, hrsg. von dr. O. Dammer. IV. band. Die fortschritte der anorganischen chemie in den jahren 1892-1902. Bearb. von ... dr. Baur ... dr. R. J. Meyer, prof. dr. Muthmann, dr. Nass, prof. dr. Nernst ... dr. Rothmund, dr. Stritar, prof. dr. Zeisel.Dates of publication: 1. bd., 1892; 2. bd., 1.-2. th., 1894; 3. bd., 1893; 4. bd., 1903.Physikalisch-chemische tabellen der anorganischen chemie. Von dr. Karl von Buchka. Ergänzungsband zu "O. Dammer's Handbuch der anorganischen chemie". Stuttgart, F. Enke, 1895. 348p.On t.-p. of v.2-3: Unter mitwirkung von dr. Benedict, dr. Gadebusch ... [etc.]."Synchronistische zusammenstellung der wichtigsten chemischen zeitschriften, bearb. von dr. Kaiser": v.1. p.[735]-745."Physikalische und theoretische chemie, unter mitwirkung von W. Nernst ergänzt von V. Rothmund": v.4, p.1-96."Allgemeiner theil, von dr. W. Nernst": v.1, p.1-358.Mode of access: Internet
Comparing charge transport predictions for a ternary\ud electrolyte using the Maxwell–Stefan and Nernst–Planck\ud equations
No full textIn this work, we investigate and compare the Maxwell–Stefan and Nernst–Planck equations for modeling multicomponent charge transport in liquid electrolytes. Specifically, we consider charge transport in the Li+/I−/I3−/ACN ternary electrolyte originally found in dye-sensitized solar cells. We employ molecular dynamics simulations to obtain the Maxwell–Stefan diffusivities for this electrolyte. These simulated diffusion coefficients are used in a multicomponent charge transport model based on the Maxwell–\ud
Stefan equations, and this is compared to a Nernst–Planck based model which employs binary diffusion coefficients sourced from the literature. We show that significant differences between the electrolyte concentrations at electrode interfaces, as predicted by the Maxwell–Stefan and Nernst–Planck models, can occur. We find that these differences are driven by a pressure term that appears in the Maxwell–Stefan equations. We also investigate what effects the Maxwell–Stefan diffusivities have on the simulated charge transport. By incorporating binary diffusivities found in the literature into the Maxwell–Stefan framework, we show that the simulated transient concentration profiles depend on the diffusivities; however, the simulated equilibrium profiles remain unaffected
The spin Nernst effect in tungsten
No full textThe spin Nernst effect, direct conversion of heat current to spin current, is observed in W/CoFeB/MgO heterostructures.</jats:p
Les sondages de paix de W. Nernst auprès de F. Philippson (1915-1917)
No full textHaag Henri. Les sondages de paix de W. Nernst auprès de F. Philippson (1915-1917). In: Bulletin de la Commission royale d'histoire. Académie royale de Belgique. Tome 150, 1984. pp. 328-356
On the Boundedness of the Dimensionless Index of Performance of a Nernst Effect Generator
No full textThe author, in an earlier paper, analyzed a Nernst effect generator by the usual thermodynamic methods and found that a bound of unity arises on the dimensionless quantity θT where θ is given as the square of the product of the Nernst coefficient and magnetic field divided by the thermal conductivity and electrical resistivity. By application of the appropriate equations of semiconductor theory this bound is shown to be justified for four limiting cases: Weak magnetic fields considering both extrinsic and intrinsic materials, and strong magnetic fields considering both extrinsic and intrinsic materials.</jats:p
Prof. Th. W. Adorno and the author Hans Erich Nossack.
No full textProf. Th. W. Adorno and the author Hans Erich Nossack at a reception of Insel Verlag, Buchmesse Frankfurt 1966LB
Nernst-Ettingshausen effect in thin Pt and W films at low temperatures
No full textAs spin caloritronic measurements become increasingly common techniques for
characterizing material properties, it is important to quantify potentially
confounding effects. We report measurements of the Nernst-Ettingshausen
response from room temperature to 5 K in thin film wires of Pt and W, metals
commonly used as inverse spin Hall detectors in spin Seebeck characterization.
Johnson-Nyquist noise thermometry is used to assess the temperature change of
the metals with heater power at low temperatures, and the thermal path is
analyzed via finite-element modeling. The Nernst-Ettingshausen response of W is
found to be approximately temperature-independent, while the response of Pt
increases at low temperatures. These results are discussed in the context of
theoretical expectations and the possible role of magnetic impurities in Pt.Comment: 14 pages, 3 figures + supplementary material of 12 pages and 5
figure
Nowe spojrzenie na planowanie architektury mieszkaniowej w afryce subsaharyjskiej
No full textThe author shares his reflections on state of art in housing and urban planning, deficiencies, expectations and possibilities in the Sahel region of Africa. He notices, that the housing problem in Africa is one of the challenges, which should be solved in order to recover life dignity of African people and secure their rights to traditional family life in acceptable conditions. The paper describes the studies on the typical dispersed urban structures and the need to foster this type of settlement structure and proposals of introduction of new on light steel frame housing system in the area of Sahel, combining the traditional way of building houses with modern technology. The particularly analysed case, is the housing problem in the Republic of Chad. The author presents the basic discussion on this topic and his architectural proposals. Unfortunately, the gap between the needs and the financial feasibility of housing construction in this area, makes this project already at the starting point extremely difficult to be realized without external subventions.Problem mieszkaniowy w Afryce jest jednym z wyzwań, które należy rozwiązać, aby Afrykanie mogli odzyskać godność życiową i zabezpieczyć swoje prawa do tradycyjnego życia rodzinnego w akceptowalnych warunkach. W artykule opisano badania nad typowymi rozproszonymi strukturami miejskimi i potrzebą wspierania tego typu struktur osadniczych oraz propozycji wprowadzenia nowego systemu konstrukcji domów, opartym na lekkim szkielecie stalowym, łączącym tradycyjny sposób budowania domów z nowoczesną technologią. Przypadkiem szczególnie analizowanym jest problem mieszkaniowy w Republice Czadu. Autor przedstawia podstawową dyskusję na ten temat i swoje propozycje architektoniczne. Niestety luka między potrzebami mieszkaniowymi w Czadzie a finansową wykonalnością budownictwa mieszkaniowego w tym obszarze sprawia, że projekt ten, już w punkcie wyjścia, jest niezwykle trudny do realizacji bez uzyskania zewnętrznych dotacji
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