Characterization of rock slopes through slope mass rating using 3D point clouds

Rock mass classification systems are widely used tools for assessing the stability of rock slopes. Their calculation requires the prior quantification of several parameters during conventional fieldwork campaigns, such as the orientation of the discontinuity sets, the main properties of the existing discontinuities and the geo-mechanical characterization of the intact rock mass, which can be time-consuming and an often risky task. Conversely, the use of relatively new remote sensing data for modelling the rock mass surface by means of 3D point clouds is changing the current investigation strategies in different rock slope engineering applications. In this paper, the main practical issues affecting the application of Slope Mass Rating (SMR) for the characterization of rock slopes from 3D point clouds are reviewed, using three case studies from an end-user point of view. To this end, the SMR adjustment factors, which were calculated from different sources of information and processes, using the different softwares, are compared with those calculated using conventional fieldwork data. In the presented analysis, special attention is paid to the differences between the SMR indexes derived from the 3D point cloud and conventional field work approaches, the main factors that determine the quality of the data and some recognized practical issues. Finally, the reliability of Slope Mass Rating for the characterization of rocky slopes is highlighted.

Multiwavelength study of the fast rotating supergiant high-mass X-ray binary IGR J16465−4507

Context. Since its launch, the X-ray and γ-ray observatory INTEGRAL satellite has revealed a new class of high-mass X-ray binaries (HMXB) displaying fast flares and hosting supergiant companion stars. Optical and infrared (OIR) observations in a multi-wavelength context are essential to understand the nature and evolution of these newly discovered celestial objects. Aims. The goal of this multiwavelength study (from ultraviolet to infrared) is to characterise the properties of IGR J16465−4507, to confirm its HMXB nature and that it hosts a supergiant star. Methods. We analysed all OIR, photometric and spectroscopic observations taken on this source, carried out at ESO facilities. Results. Using spectroscopic data, we constrained the spectral type of the companion star between B0.5 and B1 Ib, settling the debate on the true nature of this source. We measured a high rotation velocity of v = 320 ± 8km s-1 from fitting absorption and emission lines in a stellar spectral model. We then built a spectral energy distribution from photometric observations to evaluate the origin of the different components radiating at each energy range. Conclusions. We finally show that, having accurately determined the spectral type of the early-B supergiant in IGR J16465−4507, we firmly support its classification as an intermediate supergiant fast X-ray transient (SFXT).

Journal of the British expedition from Detroit to Vincennes and its defeat by George Rogers Clark : manuscript, 1778-1782

Account of the British forces' expedition which captured Vincennes, Indiana in Dec. 1778, with an account of their eventual defeat in 1779 at the Battle of Vincennes by the American Revolutionary forces led by Col. George Rogers Clark.

Mass balance of Stubacher Sonnblickkees, Hohe Tauern Range, Eastern Alps, Austria

Results of the direct, glaciological determination of the mass budget of Stubacher Sonnblick kees in the Hohe Tauern group are summarized for the years 1971/72 through 1977/78. Tabulation of budget quantities, accumulation and ablation areas and distribution of budget terms for 50 m altitude intervals is supplemented by comments on observations and field work.

Mass distribution of the human body using biostereometrics. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

The victory of the Marne; the enemy's onslaught--order to stand firm--the battle--immediate results--historic consequences, /

Mode of access: Internet.

Refractory metal constitution diagrams

Mode of access: Internet.

Gettysburg, a history of the Gettysburg battle-field memorial association, with an account of the battle

A later edition, abridged, was published under title: Gettysburg; where and how the regiments fought.

The sequestered shrine: "Arvia" at Shirley Center, Massachusetts, dedicated to Marion Morse MacKaye

Pages [29]-53 are a reprint (with original page numbering also) of the author's What is she? A sonnet of sonnets to Marion Morse ... Concord, Mass., 1943.

Technical report.

Mode of access: Internet.

The first iron-clad naval engagement in the world : history of facts of the great naval battle between the Merrimac-Virginia, C.S.N. and the Ericsson Monitor, U.S.N., Hampton Roads, March 8 and 9 1862 /

Mode of access: Internet.

Essays,

Omits New England reformers.

The history of the Puritans, or Protestant non-conformists, with an account of their principles; their attempts for a further reformation in the church; their sufferings; and the lives and characters of their most considerable divines.

Vols. II-III have imprint: Published by Charles Ewer, Boston; and William B. Allen & co., Newburyport, Ms. 1817. Wm. B. Allen & co. prnters: vol. IV-V: Published by Charles Ewer, Boston; and E. W. Allen, Newburyport, Mass. 1817. E. W. Allen printer (vol. V. omits "Mass")

The second usurpation of Buonaparte; or, A history of the causes, progress and termination of the revolution in France in 1815: particularly comprising a minute and circumstantial account of the ever-memorable victory of Wateloo. To which are added appendices, containing the official bulletins of this glorious and decisive battle ...

Mode of access: Internet.

Paris revisited, in 1815, by way of Brussels : including a walk over the field of battle at Waterloo /

Mode of access: Internet.