A new method for measuring the space between two metal plates using a Compton backscattering method

2020 ◽  
Vol 15 (08) ◽  
pp. T08003-T08003
Author(s):  
M.T. Sasanpour ◽  
A. Taheri ◽  
M. Askari
Keyword(s):  
New Method ◽  
Metal Plates ◽  
Compton Backscattering ◽  
Backscattering Method

Explosive Welding Using Underwater Shock Wave Generated by the Detonation of the Detonating Code

2011 ◽  
Vol 673 ◽  
pp. 265-270 ◽  
Author(s):  
Akihisa Mori ◽  
Li Qun Ruan ◽  
Kazumasa Shiramoto ◽  
Masahiro Fujita
Keyword(s):  
Shock Wave ◽  
Sound Velocity ◽  
Detonation Velocity ◽  
Explosive Welding ◽  
New Method ◽  
Underwater Shock Wave ◽  
Metal Plates ◽  
Experimental Parameters ◽  
Underwater Shock ◽  
Point Velocity

Detonating code is a flexible code with an explosive core. It is used to transmit the ignition of explosives with high detonation velocity in the range of 5.5 to 7 km/s. However, it is difficult to use detonating code for the explosive welding of common metals since the horizontal point velocity usually exceeds the sound velocity. Hence, in the present work, a new method using underwater shock wave generated by the detonation of detonating code was tried. The details of the experimental parameters and the results are presented. From the results it is observed that the above technique is suitable to weld thin metal plates with relatively less explosives.

scholarly journals Tau mass measurement at BES-III

2019 ◽  
Vol 212 ◽  
pp. 08005
Author(s):  
M.N. Achasov ◽  
X.H. Mo ◽  
N.Yu. Muchnoi ◽  
I.B. Nikolaev ◽  
S.A. Privalov ◽  
...  
Keyword(s):  
Beam Energy ◽  
Measurement Accuracy ◽  
Mass Measurement ◽  
Threshold Region ◽  
Compton Backscattering ◽  
Backscattering Method ◽  
Integrated Luminosity

A scan of the threshold region of the process e+ e−→ τ+τ− with integrated luminosity about 140 pb−1 was performed with the BES-III detector at the BEPC-II collider in order to measure the τ-lepton mass. The beam energy was determined by the Compton backscattering method. To verify the measurement accuracy scans of the J/ψ and ψ′ resonances were performed.

New method for producing double replica for observing and a precipitates

1990 ◽  
Vol 48 (4) ◽  
pp. 842-843
Author(s):  
Krystyna Spiradek ◽  
Aleksandra Czyrska-Filemonowicz ◽  
Erwin M. Hörl
Keyword(s):  
Grain Boundaries ◽  
Surface Structure ◽  
Metallic Matrix ◽  
Ethanol Solution ◽  
New Method ◽  
Horizontal Position ◽  
Great Care ◽  
Metal Plates ◽  
Sandwich Type ◽  
Bottom Side

In metallurgy and metal physics it is very often necessary to analyse the types, shapes, sizes etc. of precipitates in a metal or metal alloy. Furthermore it is often of importance to know the distribution of these particles along the grain boundaries and within the grains. For this analysis a new EM technique has been developed.The procedure of this technicue is the following:First of all specimens are prepared of the materials to be investigated in such a way that one obtains thin metal plates or foils of a thickness of 0,1 to 0,01 mm. This foils are etched in a H2O solution of 10 % H2CrO3 for revealing the surface structure. Afterwards carbon is avaporated on both sides of the foils. In the next step a square grid of 3 mm х 3 mm is scratched into the foil on both sides in such a way that the grid of the top side is exactly positioned over the grid of the bottom side. After this procedure the specimens are inserted into an ethanol solution of 10 % bromine in a horizontal position till the metallic matrix is solved and the precipitates are left. This step takes approx. 24 hours. Afterwards the replicas consisting of the two carbon layers with the precipitates between them are cleaned using firstly ethanol afterwards 50% ethanol in destilled water and finally just destilled water (.5 hours in each bath). In the next step the replicas are put on EM grids of sandwich type. Great care is necessary in this step in order to avoid shifting of the carbon layers and disturbances of the positions of the precipitates. These replicas are now ready for TEM as well as SEM investigations, as soon as they are dry.

scholarly journals Topographic-Anatomical Validation of a New Method for Minimally-Invasive Extra-Cortical Osteosynthesis Using Plastinated Transverse Shoulder Cuts

2020 ◽  
Vol 9 (1) ◽  
pp. 49-55
Author(s):  
A. Yu. Kochish ◽  
D. A. Starchik ◽  
B. A. Maiorov ◽  
I. G. Belen'kii
Keyword(s):  
Peripheral Nerves ◽  
New Method ◽  
Anatomical Structures ◽  
Anatomical Studies ◽  
Metal Implants ◽  
Shoulder Muscle ◽  
Metal Plates ◽  
Transparent Plate ◽  
Long Head ◽  
The Right

The aim of the study was to assess capability and benefits of this method, its technical feasibility and safety regarding a damage of the most essential anatomical structures.Material and methods. The study involved 15 natural humeral bones; their parameters - the length and shape of the plates – were measured for osteosynthesis. Bone osteosynthesis was further performed on 14 intact upper limbs taken from 7 non-fixed corpses of people died at the age of 63–77 using the discussed method; after that, the operated limbs were studied using preparating technique. Furthermore, after plate application on two shoulder sections, 12 transverse cuts with their epoxy plastination were made at three levels according to the original technology; this was followed by the preparation of histotopographic sections.Results. The results obtained have demonstrated that for the new method of bone osteosynthesis it is advisable to use metal plates 220–260 mm long with spiral twisting clockwise for the right humerus and counterclockwise for the left. Average distances from the fixed plate to the humerus, tendon of the long head of the biceps of the shoulder muscle, large blood vessels and peripheral nerves were determined using precision preparation and measurements; the measurements were also performed on transparent plate-shaped shoulder cuts. All the above validates safety of the discussed method regarding a damage of the most essential anatomical structures and allow to successfully use it in the clinical practice.Conclusion. The discussed technique of plastinated transverse shoulder cuts with further experimental fixation of metal implants for osteosynthesis ensures safety of the initial topographic and anatomical relationships of these structures with anatomical structures. In addition, high transparency of the tissues created by epoxy plastination allows determining distances between implants and important anatomical structures with high precision, the fact being of great significance in applied anatomical studies.

Incremental Bending of Three-Dimensional Free Form Metal Plates Using Minimum Energy Principle and Model-Less Control

2017 ◽  
Vol 139 (7) ◽  
Author(s):  
Xiaobing Dang ◽  
Kai He ◽  
Wei Li ◽  
Qiyang Zuo ◽  
Ruxu Du
Keyword(s):  
Computer Vision ◽  
Minimum Energy ◽  
Three Dimensional ◽  
Metal Plate ◽  
New Method ◽  
Free Form ◽  
Energy Principle ◽  
Minimum Energy Principle ◽  
Metal Plates ◽  
Beam Bending

Bending 3D free form metal plates is a common process used in many heavy industries such as shipbuilding. The traditional method is the so-called line heating method, which is not only labor intensive but also inefficient and error-prone. This paper presents a new incremental bending method based on minimum energy principle and model-less control. First, the sheet metal is discretized into a number of strips connected through virtual springs. Next, by applying the minimum energy principle, the punching and supporting points are calculated for the strip. Then, the bended shape of the strip is computed based on the beam bending theory. This process is continued until the final shape is reached. To compensate the bending error, the computer vision-based model-less control is applied. The computer vision detects the bending error based on which additional bending steps are calculated. The new method is tested in a custom build incremental bending machine. Different metal plates are formed. For a metal plate of 1000 × 800 × 5 mm3, the average bending error is less than 3 mm. In comparison with the existing methods, the new method has a number of advantages, including simple, fast, and highly energy efficient.

scholarly journals III. Measurements of electrical constants. No. II

1878 ◽  
Vol 27 (185-189) ◽  
pp. 270-271
Keyword(s):  
New Method ◽  
Permanent Strain ◽  
Metal Plates

The author has, under Professor Clerk Maxwell’s directions, carried out some measurements of specific inductive capacities by a new method. The essential features of it are:— (1.) It is a zero method. (2.) The electrified metal plates never touch the dielectrics. (3.) No permanent strain is produced or charge communicated, as the electrification is reversed some 12,000 times per second. The potentials of the electrified plates were about equal to that of 2,000 cells.

Selective Sampling and Orientation of Non-Homogeneous Tissues

1968 ◽  
Vol 26 ◽  
pp. 98-99
Author(s):  
C. C. Clawson ◽  
L. W. Anderson ◽  
R. A. Good
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Light Microscopy ◽  
Random Sampling ◽  
New Method ◽  
Microscope Examination ◽  
Small Areas ◽  
Selective Sampling ◽  
Large Numbers ◽  
Specific Orientation

Investigations which require electron microscope examination of a few specific areas of non-homogeneous tissues make random sampling of small blocks an inefficient and unrewarding procedure. Therefore, several investigators have devised methods which allow obtaining sample blocks for electron microscopy from region of tissue previously identified by light microscopy of present here techniques which make possible: 1) sampling tissue for electron microscopy from selected areas previously identified by light microscopy of relatively large pieces of tissue; 2) dehydration and embedding large numbers of individually identified blocks while keeping each one separate; 3) a new method of maintaining specific orientation of blocks during embedding; 4) special light microscopic staining or fluorescent procedures and electron microscopy on immediately adjacent small areas of tissue.

A new method for the determination of nitrates

1960 ◽  
Vol 23 ◽  
pp. 227-232 ◽  
Author(s):  
P WEST ◽  
G LYLES
Keyword(s):  
New Method
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