Generation of 49 fs pulses in a CPM laser pumped by a small-frame Ar+ laser

1991 ◽  
Vol 52 (2) ◽  
pp. 117-121 ◽  
Author(s):  
P. Mataloni ◽  
M. Santosuosso ◽  
F. De Martini ◽  
S. Bollanti
Keyword(s):  
Small Frame

scholarly journals Close-range geological photogrammetry studies: field and laboratory procedures with examples from prograde granulite facies orthogneisses, Kerala, South India

1992 ◽  
Vol 156 ◽  
pp. 53-62
Author(s):  
A.A Garde
Keyword(s):  
South India ◽  
Granulite Facies ◽  
Ground Control ◽  
Practical Procedure ◽  
Small Frame ◽  
Palghat Gap ◽  
Close Range ◽  
On Line ◽  
Laboratory Procedures ◽  
Metamorphic Facies

Precambrian orthogneisses exposed in quarries in the Palghat Gap, KeraIa, South India, were photographed for use in geological photogrammetry studies with a 35 mm (small frame) hand-held camera. Local ground control was provided by simple means: hand level, geological compass and 2 m rule. The practical procedure of photography and acquisition of ground control data is described. The stereoscopic photographs, which show complicated field relations in gneisses with prograde, transitional amphibolite to granulite metamorphic facies relations, were studied using multi-model photogrammetry (see Dueholm, 1992) and an analytical plotter. The estimated standard deviations in the stereo models of scale, azimuth and levelling were ± 2%, 2° and 5°, respectively, but the precision was very good (Iess than 1 cm). Outcrop maps were drawn with an on-line plotter at scales varying from 1:25 to 1:200 with contour intervals between 5 and 100 cm. The plot data were transferred, edited on a Macintosh computer and made ready for publication with a vector-based graphics application.

GEORGE ROCHBERG (1918–2005)Fantasies (1971)

2020 ◽  
pp. 261-264
Author(s):  
Jane Manning
Keyword(s):  
Diverse Range ◽  
Small Frame ◽  
George Rochberg ◽  
Voice And Piano ◽  
Breath Control

This chapter examines George Rochberg’s Fantasies, written as a present for his wife on their thirtieth wedding anniversary. A set of four haiku-like miniatures for medium voice and piano, Fantasies makes an ideal introduction to a modernist vocal idiom for those who have yet to lose their inhibitions and plunge into new territory. A flexible mezzo would perhaps be best suited to the diverse range of styles packed into such a small frame. Clear projection is essential, in view of the economy of the vocal writing, and a certain forthright strength, as well as a poised lightness. There are just a few moments of Sprechstimme, whispered as well as spoken, and a couple of long, arching melismas, which require considerable breath control. In contrast, speech rhythms are also deftly employed. It is the pianist, however, who has the lion's share in shaping the narrative and illustrating the texts, in a most satisfying part, full of wit and humour, and incorporating some challenging figurations.

scholarly journals Analytical procedures for 3D mapping at the Photogeological Laboratory of the Geological Survey of Denmark and Greenland

2018 ◽  
pp. 99-104 ◽  
Author(s):  
Erik Vest Sørensen ◽  
Mads Dueholm
Keyword(s):  
Three Dimensional ◽  
Three Dimensions ◽  
Geological Survey ◽  
Aerial Photographs ◽  
3D Mapping ◽  
Digital Version ◽  
Remote Sensing Technique ◽  
Small Frame ◽  
Analytical Procedures ◽  
Steep Terrain

Photogrammetry is a classical remote sensing technique dating back to the 19th century that allows geologists to make three-dimensional observations in two-dimensional images using human stereopsis. Pioneering work in the 1980s and 1990s (Dueholm 1992) combined the use of vertical (nadirlooking) aerial photographs with oblique stereo images from handheld small-frame cameras into so-called multi-model photogrammetry. This was a huge technological step forward that made it possible to map, in three dimensions, steep terrain that would otherwise be inaccessible or poorly resolved in conventional nadir-looking imagery. The development was fundamental to the mapping and investigation of e.g. the Nuussuaq basin (Pedersen et al. 2006). Digital photogrammetry, the all-digital version of multi-model photogrammetry, is nowadays an efficient and powerful geological tool that is used by the Photogeological Laboratory at the Geological Survey of Denmark and Greenland (GEUS) to address geological problems in a range of projects from 3D mapping to image-based surface reconstruction and orthophoto production. Here we present an updated description (complementary to Dueholm 1992) of the analytical procedures in the typical digital workflow used in current 3Dmapping projects at GEUS.

scholarly journals Vehicle Logo Recognition with Small Sample Problem in Complex Scene Based on Data Augmentation

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Xiao Ke ◽  
Pengqiang Du
Keyword(s):  
Gaussian Distribution ◽  
Data Augmentation ◽  
Small Sample Size ◽  
Small Sample ◽  
Segmentation Method ◽  
Complex Scene ◽  
Logo Recognition ◽  
Small Frame ◽  
Complex Scenes ◽  
Frame Method

Automatic identification for vehicles is an important topic in the field of Intelligent Transportation Systems (ITS), and the vehicle logo is one of the most important characteristics of a vehicle. Therefore, vehicle logo detection and recognition are important research topics. Because of the problems that the area of a vehicle logo is too small to be detected and the dataset is too small to train for complex scenes, considering the speed of recognition and the robustness to complex scenes, we use deep learning methods which are based on data optimization for vehicle logo in complex scenes. We propose three augmentation strategies for vehicle logo data: cross-sliding segmentation method, small frame method, and Gaussian Distribution Segmentation method. For the problem of small sample size, we use cross-sliding segmentation method, which can effectively increase the amount of data without changing the aspect ratio of the original vehicle logo image. To expand the area of the logos in the images, we develop the small frame method which improves the detection results of the small area vehicle logos. In order to enrich the position diversity of vehicle logo in the image, we propose Gaussian Distribution Segmentation method, and the result shows that this method is very effective. The F1 value of our method in the YOLO framework is 0.7765, and the precision is greatly improved to 0.9295. In the Faster R-CNN framework, the F1 value of our method is 0.7799, which is also better than before. The results of experiments show that the above optimization methods can better represent the features of the vehicle logos than the traditional method, and the experimental results have been improved.

A very small frame-shifting deletion within exon 19 of the Duchenne muscular dystrophy gene

1990 ◽  
Vol 170 (2) ◽  
pp. 963-967 ◽  
Author(s):  
Masafumi Matsuo ◽  
Takehiro Masumura ◽  
Toshihiro Nakajima ◽  
Yoshihiko Kitoh ◽  
Toru Takumi ◽  
...  
Keyword(s):  
Duchenne Muscular Dystrophy ◽  
Muscular Dystrophy ◽  
Duchenne Muscular Dystrophy Gene ◽  
Small Frame ◽  
Exon 19

scholarly journals The theory of the katharometer

1920 ◽  
Vol 97 (685) ◽  
pp. 273-286 ◽  
Keyword(s):  
Copper Wire ◽  
Outer Part ◽  
Glass Tube ◽  
Wheatstone Bridge ◽  
The Other ◽  
Lead Wire ◽  
Thin Glass ◽  
Small Frame ◽  
Outer Atmosphere ◽  
Lower Temperature

[ Historical Note by G. A. Shakespear, M. A., D. Sc. —In September, 1915, at the request of a member of the Board of Invention and Research of the Admiralty, I undertook to devise an instrument capable of giving automatic indication of the presence of hydrogen in small quantities ( e. g ., 1 or 2 per cent.) in air. The well-known surface-action of palladium and platinum wires suggested itself as a phenomenon obviously adapted to the purpose. The wire was used as two arms of a Wheatstone bridge, one of these arms being protected from the gas by a thin glass tube, the other being exposed. When a sufficiently great current of electricity was passed through the bridge, the exposed arm rapidly increased in temperature owing to surface combustion. The temperature, however, was liable to rise dangerously high if the hydrogen were present in suitable quantity, and, as safety from explosion was indispensable, this method was abandoned. The same apparatus was then applied with a much lower current, and with the wires consequently at a much lower temperature, to make use of the increase in thermal conductivity of the gas due to the admixture of hydrogen. This arrangement was found to be unexpectedly sensitive, and the method was adopted for the desired purpose. As the instrument was primarily intended to measure the purity of the air, the name “katharometer” was given to it. In its final form, the katharometer consisted of two small helices of thin platinum wire (about 0·001 inch diameter), enclosed each in one of two cells in a copper block. The arrangement will be readily understood from a reference to the accompanying figure (fig. 1). Each helix was mounted in a small frame, consisting of a loop of copper wire soldered to a ring of copper. This ring was fitted with an insulating plug, through which the lead wire, also of copper, was introduced. One extremity of the helix was soldered to the lead and the other to the distal end of the loop. The outer part of the lead passed through a plug of rubber fitting into the cell, and over this rubber an ebonite plug was pressed down by a screw collar or nipple. Thus the rubber filled tightly the upper part of the cell, and access of air or gas could only take place by diffusion through the rubber. This diffusion is a slow process, and, for the purpose for which the katharometer was originally intended, such a joint was sufficiently nearly gas-tight. Minor improvements in detail were afterwards introduced. Both cells were similarly fitted, but whereas one was thus hermetically sealed, the other communicated with the outer atmosphere through three small holes. The resistance of each helix was about 8 ohms when cold, and the main working current in the bridge was usually 0·100 ampère; this was sufficient for most purposes, and gave the wires a temperature about 15°C. above that of the block. The remaining arms of the bridge were of manganin wire.

Thermal Stress Performance Analysis for a New External Wall Insulation System

2011 ◽  
Vol 71-78 ◽  
pp. 1929-1932
Author(s):  
Jian Guang Li
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
The Other ◽  
Stress And Strain ◽  
Insulation System ◽  
Shear Key ◽  
Small Frame ◽  
Extreme High Temperature ◽  
System Temperature

In this paper, two models are taken as subjects, one being a small frame exterior composite insulation system with the shear key, the other being the system without the shear key. In extreme high temperature conditions in summer, the small frame exterior composite insulation system temperature stress and strain are analyzed with numerical simulation using finite element method. Results show that shear key can effectively reduce the stress concentration, weaken the stress peak by nearly 50% and reduce the deformation by nearly 50% as well, thus effectively reducing the probability of crack cracking, improving the durability and extending service life.

Temporal Scale, The Far Future and Inhuman Times: Foresight in Wells and Woolf, Time Travel in Olaf Stapledon and Terrence Malick

2019 ◽  
pp. 166-211
Author(s):  
Charles M. Tung
Keyword(s):  
Nineteenth Century ◽  
Long Range ◽  
Human Life ◽  
Time Travel ◽  
Temporal Scale ◽  
Deep Time ◽  
Small Frame ◽  
Far Future ◽  
Olaf Stapledon ◽  
The Way

This chapter links the period’s visions of the far future with modernism’s engagement with deep time in order to show how the big historicising that begins in the nineteenth century is not solely about the expansion of historicity but the multiplicity and alternative futurity that follows from it. While the heterochrony of modernist temporal zoom includes the dissolution characteristic of immense expansions of perspective, it is not centred solely on the absorption of a small frame into some more certain, fundamental backdrop. The incongruity between the aesthetic’s imperative to scale itself to what we care about and the immensity of things that can only be registered from far away – temporal hyperobjects, speculative outsides, far-futural risks – is valuable not only for the critique of modernity’s compressed timescapes that it enables, but also for the way it reveals the plurality of times that cannot be nested within one another. This chapter constructs a relationship between genre fiction’s scope and modernism’s long-range aesthetics – the connection between SF’s literal movement away from earthly temporal units (days,years, events, lives, the career of the human as such) and modernist attempts to picture human life from an estranging distance.

Sign in / Sign up

Export Citation Format

Share Document