A Gold Vase of Early Helladic Type

1924 ◽  
Vol 44 (2) ◽  
pp. 163-165 ◽  
Author(s):  
V. Gordon Childe
Keyword(s):  
Cross Section ◽  
Rectangular Cross Section ◽  
Metal Workers ◽  
Single Piece ◽  
To Receive ◽  
Made In

The identification of the Early Helladic civilisation has been the most notable advance made in Greek prehistory since the war. Our knowledge of this earliest Aegean culture on the Mainland is still very fragmentary. But the Louvre has possessed for nearly fifty years a precious document which can now be assigned its true place and sheds an unexpected light on the epoch. It is a gold ‘sauce-boat’ of the form already so familiar in clay at Korakou and Tiryns. Thanks to the courtesy of M. Etienne Michon, Conservator of the Greek and Roman Antiquities, I am permitted to publish this remarkable object (Fig. 1).Save for the handle, our vase has been beaten out of a single piece of metal. The walls are exceedingly thin, not more than ·3 mm. thick, but, as with the gold beakers from Troy, measuring more at the rim, the edge being ·9 mm. across. The base is cupped to form a ring foot, a procedure also adopted by Trojan and Sumerian metal-workers. The handle is formed by a strip of gold with rectangular cross section, flattened at either end to receive the rivets which attach it to the vase. Its three outer sides are engraved with a herringbone pattern. The complete vessel weighs 125·2 grammes.

Aerodynamic Throttling of a Two-Dimensional Flow by a Thick Jet

1976 ◽  
Vol 27 (3) ◽  
pp. 229-242 ◽  
Author(s):  
J B Stek ◽  
H Brandt
Keyword(s):  
Cross Section ◽  
Rectangular Cross Section ◽  
Maximum Height ◽  
Pressure Measurements ◽  
Two Dimensional ◽  
Pressure Distributions ◽  
Air Jet ◽  
Two Dimensional Flow ◽  
Made In

SummaryThe velocity and pressure distributions in a flow generated by a thick air jet that throttles a confined airstream have been studied analytically and experimentally. Velocity and pressure measurements were made in a duct with a rectangular cross section of 102 mm height and 19 mm depth, through which air flowed at velocities ranging from 65 to 80 m/s. The airstream was throttled by a thick air jet having velocities ranging from 130 to 150 m/s that entered the mainstream at angles ranging from 60° to 135°. The jet-mainstream contour was found to be elliptical and agreement within six per cent was obtained between the theoretically and experimentally determined maximum height of the contour. Jet spreading was found to be linear. The theory permits determination of the velocity profile in the jet and gives velocities that deviate less than ten per cent from values obtained experimentally.

Computation of Ship Interaction Forces in Restricted Waters

1993 ◽  
Vol 37 (04) ◽  
pp. 298-306 ◽  
Author(s):  
F. T. Korsmeyer ◽  
C.-H. Lee ◽  
J. N. Newman
Keyword(s):  
Free Surface ◽  
Green Function ◽  
Cross Section ◽  
Rectangular Cross Section ◽  
Three Dimensional ◽  
Computational Effort ◽  
Computational Results ◽  
Interaction Forces ◽  
Irregular Surfaces ◽  
Made In

Theoretical and computational results are presented for the interaction forces among multiple ships or bodies which are operating near to each other. These computations are made under several assumptions, the most important of which is that the free surface is rigid. An assumption usually made in the analysis of this problem is that the ships are slender, but the approach taken here is fully three-dimensional. The method is applicable to any number of arbitrarily shaped bodies in arbitrary motion in a fluid domain which may be bounded by irregular surfaces. Results are presented for the simple case of two ships passing in a canal of rectangular cross section, for which a particular Green function greatly reduces the computational effort; and for two ships passing in a canal with sloping sides, for which no such economies are available.

Searching for the causes why some of the paintings by Mihaly Munkacsy are darkening

1990 ◽  
Vol 48 (2) ◽  
pp. 204-205
Author(s):  
Imre Pozsgai ◽  
Klara Erdöhalmi-Torok
Keyword(s):  
Electron Beam ◽  
Cross Section ◽  
Polyester Resin ◽  
National Gallery ◽  
X Ray ◽  
Art Historians ◽  
Made In ◽  
Grinding And Polishing

The paintings by the great Hungarian master Mihaly Munkacsy (1844-1900) made in an 8-9 years period of his activity are deteriorating. The most conspicuous sign of the deterioration is an intensive darkening. We have made an attempt by electron beam microanalysis to clarify the causes of the darkening. The importance of a study like this is increased by the fact that a similar darkening can be observed on the paintings by Munkacsy’s contemporaries e.g Courbet and Makart. A thick brown mass the so called bitumen used by Munkacsy for grounding and also as a paint is believed by the art historians to cause the darkening.For this study, paint specimens were taken from the following paintings: “Studio”, “Farewell” and the “Portrait of the Master’s Wife”, all of them are the property of the Hungarian National Gallery. The paint samples were embedded in a polyester resin “Poly-Pol PS-230” and after grinding and polishing their cross section was used for x-ray mapping.

scholarly journals Designing for People’s Safety on Flooded Streets: Uncertainties and the Influence of the Cross-Section Shape, Roughness and Slopes on Hazard Criteria

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2119
Author(s):  
Luís Mesquita David ◽  
Rita Fernandes de Carvalho
Keyword(s):  
Cross Section ◽  
Overland Flow ◽  
Rectangular Cross Section ◽  
Safety Hazard ◽  
Cross Section Shape ◽  
Section Shape ◽  
Flood Flows ◽  
The Cross ◽  
Flooding Risk

Designing for exceedance events consists in designing a continuous route for overland flow to deal with flows exceeding the sewer system’s capacity and to mitigate flooding risk. A review is carried out here on flood safety/hazard criteria, which generally establish thresholds for the water depth and flood velocity, or a relationship between them. The effects of the cross-section shape, roughness and slope of streets in meeting the criteria are evaluated based on equations, graphical results and one case study. An expedited method for the verification of safety criteria based solely on flow is presented, saving efforts in detailing models and increasing confidence in the results from simplified models. The method is valid for 0.1 m2/s 0.5 m2/s. The results showed that a street with a 1.8% slope, 75 m1/3s−1 and a rectangular cross-section complies with the threshold 0.3 m2/s for twice the flow of a street with the same width but with a conventional cross-section shape. The flow will be four times greater for a 15% street slope. The results also highlighted that the flood flows can vary significantly along the streets depending on the sewers’ roughness and the flow transfers between the major and minor systems, such that the effort detailing a street’s cross-section must be balanced with all of the other sources of uncertainty.

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