Zur Methode der fortgesetzten Auslage in der Refraktionsseismik     

Priv.-Doz. Dr. Max Weber 《Pure and Applied Geophysics》1960,47(1):12-16

Zusammenfassung Es wird die Methode der fortgesetzten Auslage in der Refraktionsseismik allgemein behandelt, und dazu werden einige Beispiele gegeben.

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Summary The method of continuous profiling in the refraction seismic is generally treated and some examples are given.

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An Innovative Post Grouting Technique for Soil Nails     

Barbosa  Max Gabriel Timo  de Assis  André Pacheco  da Cunha  Renato Pinto 《Geotechnical and Geological Engineering》2022,40(11):5539-5546

This study presents an innovative technique of executing soil nails called sectorized post grouting (SPG). The most utilized technique of soil nail grouting is gravity grouting, with the literature reporting advances in pressurized grouting. Although obtaining higher pullout resistance of soil nails, pressurized grouting, mostly done in single-stage grouting, does not compensate for exudation and its use in higher nail lengths is difficult. Thus, a technique has been developed that compensates for exudation, with easier application in lengthier nails. The technique was qualitatively assessed to evaluate its surface roughness and later applied in seven real soil nailing works, where it could be quantitatively assessed. The results show that sectorized post-grouted nails obtained greater pullout resistances than gravity grouted and single-stage grouted nails. Although similar improvement was found in tube-à-manchette (TAM) grouted nails, this method presents lower economic efficiency than sectorized post grouting. The pullout resistance results obtained in this study can be utilized in future soil nailing works executed utilizing SPG.

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Will point sources spoil 21-cm tomography?     

Adrian Liu  Max Tegmark  Matias Zaldarriaga 《Monthly notices of the Royal Astronomical Society》2009,394(3):1575-1587

21-cm tomography is emerging as a promising probe of the cosmological dark ages and the epoch of reionization, as well as a tool for observational cosmology in general. However, serious sources of foreground contamination must be subtracted for experimental efforts to be viable. In this paper, we focus on the removal of unresolved extragalactic point sources with smooth spectra, and evaluate how the residual foreground contamination after cleaning depends on instrumental and algorithmic parameters. A crucial but often ignored complication is that the synthesized beam of an interferometer array shrinks towards higher frequency, causing complicated frequency structure in each sky pixel as 'frizz' far from the beam centre contracts across unresolved radio sources. We find that current-generation experiments should none the less be able to clean out this point source contamination adequately, and quantify the instrumental and algorithmic design specifications required to meet this foreground challenge.  相似文献   

Photometric mapping of Asteroid (4) Vesta’s southern hemisphere with Hubble Space Telescope     

Jian-Yang Li  Lucy A. McFadden  Max J. Mutchler  Eliot F. Young  Mark V. Sykes 《Icarus》2010,208(1):238-251

We present the surface mapping of the southern hemisphere of Asteroid (4) Vesta obtained from Hubble Space Telescope (HST). From 105 images of Vesta through four filters in the wavelengths best to characterize the 1-μm pyroxene band, we constructed albedo and color-ratio maps of Vesta. These new maps cover latitudes −50° to +20°. The southern hemisphere of Vesta displays more diverse albedo and color features than the northern hemisphere, with about 15 new albedo and color features identified. The overall longitudinal albedo and color variations in the southern hemisphere are comparable with that of the northern hemisphere, with a range of about ±20% and ±10%, respectively. The eastern hemisphere is brighter and displays more diogenitic minerals than the western hemisphere. Correlations between 1-μm band depth and band width, as well as between 1-μm band depth and albedo, are present on a global scale, attributed to pyroxene composition variations. The lack of correlations between albedo and the spectral slope indicates the absence of globalized space weathering. The lack of a global correlation between 1-μm band depth and topography suggests that the surface composition of Vesta is not completely controlled by a single impact. The distribution of compositional variation on Vesta suggests a possible large impact basin. Evidence of space weathering is found in regions, including the bright rim of the south-pole crater where the steepest gravitational slope on Vesta is, and a dark area near a gravitationally flat area. We propose to divide the surface of Vesta into six geological units different from the background according to their 1-μm absorption features and spectral slopes, including two eucrite-rich units, a low-Ca eucrite unit, a diogenite-rich unit, a space weathered unit, and a freshly exposed unit. No evidence of olivine-rich area is present in these data.  相似文献   

The host galaxies of strong Ca ii quasar absorption systems at z < 0.5     

Berkeley J. Zych  Michael T. Murphy  Max Pettini  Paul C. Hewett  Emma V. Ryan-Weber  Sara L. Ellison 《Monthly notices of the Royal Astronomical Society》2007,379(4):1409-1422

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Protokoll über die Geschäftssitzung der Geologischen Vereinigung in Frankfurt a. M. am 4. Januar 1937     

Max Richter 《International Journal of Earth Sciences》1937,28(1-2):135-135

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Big Earth Data science: an information framework for a sustainable planet     

Huadong Guo  Dong Liang  Max Craglia  Lizhe Wang  Sven Schade 《International Journal of Digital Earth》2020,13(7):743-767

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Evaluation of a Shallow Leaky Water Table Aquifer in a Subhumid Region of France     

Max A. Saint-Pé 《Ground water》1973,11(4):23-29

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Das Geologenarchiv der Geologischen Vereinigung (Das zweite Geologenarchiv)     

Prof. Dr. Max Pfannenstiel 《International Journal of Earth Sciences》1974,63(1):1-22

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Die Laufzeitfunktion in der Reflexionsseismik des quasi Einachsig inhomogenen Körpers     

Priv.-Doz. Dr. Max Weber 《Pure and Applied Geophysics》1960,45(1):53-61

Zusammenfassung Es wird die Laufzeitfunktion (Reflexionsseismik) für einen quasi einachsig inhomogenen Körper berechnet und zwei einfache Beispiele und ihre Anwendungen behandelt.

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Summary The travel-time function (reflection seismic) for a quasi uniaxial inhomogeneous medium is calculated and two simple examples are given.

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