Turbulent Waters in the EMU: Translation from WirtschaftsWoche

Zentralbank; Strukturwandel; Reform; Euro; Europäische Wirtschafts- und Währungsunion; Deutschland

Assessing Franz Boas’ ethics in his Arctic and later anthropological fieldwork

Cet article concerne la dimension éthique des recherches sur le terrain qu’a faites Franz Boas d’abord dans l’Arctique et ensuite sur la côte Nord-ouest de l’Amérique du Nord, ceci dans le contexte scientifique de l’époque. Dans l’Arctique, Boas s’est retenu de voler des tombes mais il a exploité «son appartenance à la race blanche» pour exercer des pressions sur «ses Esquimaux» afin de poursuivre ses buts scientifiques. Sur la côte Nord-ouest, il a changé d’attitude. Se passant de toute réflexion éthique, lui et ses collaborateurs ont profané des tombes à des fins scientifiques et financières. Il est vrai que Boas a été influencé dans plusieurs domaines par Kant, mais la position éthique de Kant restait en suspens quand Boas travaillait sur le terrain. Dans ses recherches sur le terrain, Boas n’a pas respecté l’être humain en tant que fin en soi. Il adhérait plutôt à un utilitarisme éthique et soutenait une forte distinction entre la science et l’éthique.This paper attempts to trace Franz Boas’ ethics in his anthropological fieldwork in the Arctic and on the Northwest Coast within the scientific context of that time. In the Arctic, Boas refrained from grave robbery but “exploited his membership in the white race” and applied pressure on “his Eskimos” to secure his scientific goals. On the Northwest Coast, Boas changed his attitude: far from any ethical reflection, he and his collaborators desecrated graves for scientific and financial purposes. In many ways Boas was influenced by Kant, but in his field research Kant’s ethical position remained eclipsed; Boas’ practice in the field did not respect humans as an end in itself. Rather, Boas subscribed to an ethical utilitarianism and sustained a strong separation of science and ethics

Solidarische Ökonomie und Soziale Arbeit : über die Notwendigkeit wirtschaftlicher Alternativen und deren Umsetzung in der Praxis Sozialer Arbeit

In der Arbeit wird zunächst kurz das Wirtschafts- und Gesellschaftssystem des Kapitalismus mit seinen Werten und Prinzipien umrissen, um dann dessen Auswirkungen auf Mensch und Umwelt zu beschreiben. Die Notwendigkeit neuer, gerechterer und nachhaltiger Wirtschaftsformen soll herausgearbeitet werden. Als eine solche Form wird dann die Solidarische Ökonomie angeführt. Über Begriffserklärungen und –abgrenzungen, sowie den Prinzipien der Solida-rischen Ökonomie, wird dann eine Definition erarbeitet. Um Schlussfolgerungen für die Profession der Sozialen Arbeit zu ziehen, wird im letzten Abschnitt der Zusammenhang zwischen Sozialer Arbeit und Solidarischer Ökonomie über den literarischen Diskurs analysiert, indem zunächst grundlegende Begriffe definiert werden und darauf aufbauend eine Kategorisierung von Projekten und Formen Solidarischer Ökonomie vorgenommen wird. Es wird durch die Kategorisierung und das kurze Darstellen von Beispielen herausgearbeitet, wo die Potentiale für Soziale Arbeit im Feld der Solidarischen Ökonomie liegen – wo integriert Sozialer Arbeit Solidarische Ökonomie in ihrer Praxis (und umgekehrt) und wo besteht noch Nachholbedarf. Darauf aufbauend wird zum Schluss ein Ausblick geben, der die Aufgaben für die Profession der Sozialen Arbeit für die Integration des Feldes der Solidarischen Ökonomie festschreibt

Hot electron electrochemistry at silver activated by femtosecond laser pulses

A silver microelectrode with a diameter of 30 µm in an aqueous K2SO4 electrolyte was irradiated with 55 fs and 213 fs laser pulses. This caused the emission of electrons which transiently charged the electrochemical double layer. The two applied pulse durations were significantly shorter than the electron-phonon relaxation time. The laser pulse durations had negligible impact on the emitted charge, which is incompatible with multiphoton emission. On the other hand, the observed dependence of emitted charge on laser fluence and electrode potential supports the thermionic emission mechanism

Micro-magnetic and microstructural characterization of wear progress on case-hardened 16MnCr5 gear wheels

The evaluation of wear progress of gear tooth flanks made of 16MnCr5 was performed using non-destructive micro-magnetic testing, specifically Barkhausen noise (BN) and incremental permeability (IP). Based on the physical interaction of the microstructure with the magnetic field, the micro-magnetic characterization allowed the analysis of changes of microstructure caused by wear, including phase transformation and development of residual stresses. Due to wide parameter variation and application of bandpass filter frequencies of micro-magnetic signals, it was possible to indicate and separate the main damage mechanisms considering the wear development. It could be shown that the maximum amplitude of BN correlates directly with the profile form deviation and increases with the progress of wear. Surface investigations via optical and scanning electron microscopy indicated strong surface fatigue wear with micro-pitting and micro-cracks, evident in cross-section after 3 × 105 cycles. The result of fatigue on the surface layer was the decrease of residual compression stresses, which was indicated by means of coercivity by BN-analysis. The different topographies of the surfaces, characterized via confocal white light microscopy, were also reflected in maximum BN-amplitude. Using complementary microscopic characterization in the cross-section, a strong correlation between micro-magnetic parameters and microstructure was confirmed and wear progress was characterized in dependence of depth under the wear surface. The phase transformation of retained austenite into martensite according to wear development, measured by means of X-ray diffraction (XRD) and electron backscatter diffraction (EBSD) was also detected by micro-magnetic testing by IP-analysis

Influência da adição de probióticos na dieta sobre o estado sanitário e desempenho de bezerros da raça Holandesa

O experimento foi realizado no Setor de Bovinocultura de Leite da Fazenda Experimental de Iguatemi, Maringá, Paraná, com o objetivo de avaliar o efeito do uso de probióticos sobre o índice de diarréia, mortalidade e desempenho (altura e peso) de bezerros. As medições de peso e altura foram feitas logo após o nascimento dos animais, aos 30 e aos 60 dias de idade. Foram utilizados 19 bezerros puros por cruza Holandês, do nascimento aos 60 dias de idade, machos e fêmeas. Os bezerros foram distribuídos em três tratamentos: (A) leite integral + probiótico em pó solúvel, (B) leite integral + probiótico em pó solúvel e pasta probiótica de administração oral e (C) leite integral. Foram fornecidos feno e concentrado à vontade após 20 dias de idade. Os índices de diarréia e mortalidade foram nulos para os três tratamentos. Não houve diferença significativa para o ganho médio diário e mudança nas alturas tomadas nas cernelhas do nascimento aos 60 dias de idade entre os tratamentos A (0,56 kg/dia e 0,055 cm/dia), B (0,41 kg/dia e 0,075 cm/dia) e C (0,51 kg/dia e 0,043 cm/dia).The experiment was undertaken in the Section of Dairy Cattle of Experimental Farm of Iguatemi, Maringá, Paraná, with the objective of evaluating the effect of the probiotic on the diarrhea index, mortality and performance (height and weight) of calves. The weight mensurations and height were made immediately after the birth of the animals, at the 30 and the 60 days of age. It were used nineteen Holstein calves from birth to 60 days of age, males and females. The calves were randomly distributed in three treatments: (A) integral milk + soluble powdered probiotic, (B) integral milk + soluble powdered probiotic + probiotic paste by oral administration and (C) integral milk only. Hay and concentrate were supplied ad libitum from 20 days of age. The diarrhea index and mortality were null for the three treatments. There were no significant differences for the average daily gain and height whitens at 60 days among the treatments A (0.56 kg/day and 0.055 cm/day), B (0.41 kg/day and 0.075 cm/day) and C (0.51 kg/day and 0.043 cm/day)

On inconsistency of experimental data on primary nuclei spectra with sea level muon intensity measurements

For the first time a complete set of the most recent direct data on primary cosmic ray spectra is used as input into calculations of muon flux at sea level in wide energy range $E_\mu=1-3\cdot10^5$ GeV. Computations have been performed with the CORSIKA/QGSJET and CORSIKA/VENUS codes. The comparison of the obtained muon intensity with the data of muon experiments shows, that measurements of primary nuclei spectra conform to sea level muon data only up to several tens of GeV and result in essential deficit of muons at higher energies. As it follows from our examination, uncertainties in muon flux measurements and in the description of nuclear cascades development are not suitable to explain this contradiction, and the only remaining factor, leading to this situation, is underestimation of primary light nuclei fluxes. We have considered systematic effects, that may distort the results of the primary cosmic ray measurements with the application of the emulsion chambers. We suggest, that re-examination of these measurements is required with the employment of different hadronic interaction models. Also, in our point of view, it is necessary to perform estimates of possible influence of the fact, that sizable fraction of events, identified as protons, actually are antiprotons. Study of these cosmic ray component begins to attract much attention, but today nothing definite is known for the energies $>40$ GeV. In any case, to realize whether the mentioned, or some other reasons are the sources of disagreement of the data on primaries with the data on muons, the indicated effects should be thoroughly analyzed

A numerical study on the effect of cavitation erosion in a Diesel injector

The consequences of geometry alterations in a Diesel injector caused by cavitation erosion are inves-tigated with numerical simulations. The differences in the results between the nominal design geometryand the eroded one are analyzed for the internal injector flow and spray formation. The flow in the in-jector is modeled with a 3–phase Eulerian approach using a compressible pressure–based multiphase flowsolver. Cavitation is simulated with a non–equilibrium mass transfer rate model based on the simplifiedform of the Rayleigh–Plesset equation. Slip velocity between the liquid–vapor mixture and the air isincluded in the model by solving two separate momentum conservation equations. The eroded injector isfound to result to a loss in the rate of injection but also lower cavitation volume fraction inside the nozzle.The injected sprays are then simulated with a Lagrangian method considering as initial conditions thepredicted flow characteristics at the exit of the nozzle. The obtained results show wider spray dispersionfor the eroded injector and shorter spray tip penetration