scholarly journals ON-LINE LUMINESCENT DOSIMETRY OF PRODUCT PROCESSING MODE AT AN ELECTRON LINAC

2021 ◽  
pp. 126-130
Author(s):  
R.I. Pomatsalyuk ◽  
S.K. Romanovsky ◽  
V.A. Shevchenko ◽  
A.Eh. Tenishev ◽  
Yu.A. Titarenko ◽  
...  
Keyword(s):  
Electron Flux ◽  
Absorbed Dose ◽  
International Standards ◽  
The Novel ◽  
Electron Linac ◽  
Processing Mode ◽  
Sources Of Uncertainty ◽  
Novel Technique ◽  
Dose Profile ◽  
On Line

Radiation-technological processes on the basis of electron accelerators, in particular, sterilization of medical de-vices, are regulated by international standards. The distribution of the electron flux density and absorbed dose are the main parameters of such processes, that require constant monitoring. In this work, we investigated the possibil-ity to determine in real time the absorbed dose profile on the surface of an object processed using the effect of ca-thodoluminescence, that occurs when the electron flux acts on technical materials (mainly amorphous dielectrics). The results of calibration of the cathodoluminescent radiators of different composition against the absorbed dose measured by a calorimetric method are presented. The study of the novel technique at an LU-10 electron Linac of NSC KIPT made it possible to identify the sources of uncertainty and evaluate their contribution to the dose meas-urement.

Modified apical dissection and lateral prostatic fascia preservation: Preliminary analysis of the reproducibility of the novel technique

2021 ◽  
Vol 79 ◽  
pp. S1745
Author(s):  
B.M.C. Rocco ◽  
L. Sarchi ◽  
S. Assumma ◽  
A. Cassani ◽  
F. Turri ◽  
...  
Keyword(s):  
Preliminary Analysis ◽  
The Novel ◽  
Novel Technique

A Novel Technique for Growth of Lithium-free ZnO Single Crystals

2013 ◽  
Vol 1538 ◽  
pp. 405-410
Author(s):  
Shaoping Wang ◽  
Aneta Kopec ◽  
Andrew G. Timmerman
Keyword(s):  
Single Crystal ◽  
The Novel ◽  
Uv Laser ◽  
Uv Detectors ◽  
Growth Technique ◽  
Light Emitting ◽  
Alkaline Metals ◽  
Novel Technique ◽  
Solar Blind ◽  
Zno Single Crystal

ABSTRACTA ZnO single crystal is a native substrate for epitaxial growth of high-quality thin films of ZnO-based Group II-oxides (e.g. ZnO, ZnMgO, ZnCdO) for variety of devices, such as UV and visible-light emitting diodes (LEDs), UV laser diodes and solar-blind UV detectors. Currently, commercially available ZnO single crystal wafers are produced using a hydrothermal technique. The main drawback of hydrothermal growth technique is that the ZnO crystals contain large amounts of alkaline metals, such as Li and K. These alkaline metals are electrically active and hence can be detrimental to device performances. In this paper, results from a recently developed novel growth technique for ZnO single crystal boules are presented. Lithium-free ZnO single crystal boules of up to 1 inch in diameter was demonstrated using the novel technique. Results from crystal growth and materials characterization will be discussed.

scholarly journals Intentional Replantation – The novel technique for the management of separated instrument in apical third of tooth: A case report

2022 ◽  
Vol 7 (4) ◽  
pp. 250-253
Author(s):  
Harshal V Basatwar ◽  
Balaji S Kapse ◽  
Pradnya S Nagmode ◽  
Sharmika B Chechare ◽  
Aniruddha G Mundhe ◽  
...  
Keyword(s):  
Case Report ◽  
Root Canal ◽  
Tooth Extraction ◽  
Treatment Approach ◽  
Root Canal Treatment ◽  
The Novel ◽  
Second Molar ◽  
Novel Technique ◽  
Mandibular Second Molar

Intentional replantation is a procedure in which an intentional tooth extraction is performed followed by reinsertion of the extracted tooth into its own alveolus. In this article, intentional replantation is described and discussed as a treatment approach for failed root canal treatment with broken instrument periapically in mandibular second molar.

scholarly journals Solution of Parabolic Partial Differential Equations by Non-Polynomial Cubic Spline Technique

2021 ◽  
Vol 5 (3) ◽  
Author(s):  
Bilal Ahmad ◽  
Anjum Perviz ◽  
Muhammad Ozair Ahmad ◽  
Fazal Dayan
Keyword(s):  
Research Work ◽  
Numerical Test ◽  
Parabolic Partial Differential Equation ◽  
Parabolic Partial Differential Equations ◽  
The Novel ◽  
Parabolic Pdes ◽  
Partial Differential ◽  
Novel Technique ◽  
Engineering And Technology ◽  
Scientific Engineering

Parabolic partial differential equation having a great impact on our scientific, engineering and technology. Enormous research have been conducted for the solution of parabolic PDEs. . In this research work, we introduced a novel technique for the numerical solution of fourth order PDEs.  The novel technique is based upon the polynomial cubic cutting method (PCSM) was used with Adomian breakdown technique (ADM).The constraint for the alternative variables was decomposed by Edomian decomposition for the successive approximation. A numerical test problem of parabolic PDEs solved by purposed technique

scholarly journals To scavenge or not to scavenge, that is STILL the question

2012 ◽  
Vol 20 (1) ◽  
pp. 23-36 ◽  
Author(s):  
Elizabeth G. Allan ◽  
Melissa C. Kander ◽  
Ian Carmichael ◽  
Elspeth F. Garman
Keyword(s):  
Crystal Size ◽  
Chemical Species ◽  
Absorbed Dose ◽  
Dose Dependence ◽  
Radiation Chemistry ◽  
X Ray ◽  
On Line ◽  
Crystallization Conditions ◽  
Effects Of Radiation ◽  
Dose Tolerance

An extensive radiation chemistry literature would suggest that the addition of certain radical scavengers might mitigate the effects of radiation damage during protein crystallography diffraction data collection. However, attempts to demonstrate and quantify such an amelioration and its dose dependence have not yielded consistent results, either at room temperature (RT) or 100 K. Here the information thus far available is summarized and reasons for this lack of quantitative success are identified. Firstly, several different metrics have been used to monitor and quantify the rate of damage, and, as shown here, these can give results which are in conflict regarding scavenger efficacy. In addition, significant variation in results from data collected from crystals treated in nominally the same way has been observed. Secondly, typical crystallization conditions contain substantial concentrations of chemical species which already interact strongly with some of the X-ray-induced radicals that the added scavengers are intended to intercept. These interactions are probed here by the complementary technique of on-line microspectrophotometry carried out on solutions and crystals held both at 100 K and RT, the latter enabled by the use of a beamline-mounted humidifying device. With the help of computational chemistry, attempts are made to assign some of the characteristic spectral features observed experimentally. A further source of uncertainty undoubtedly lies in the challenge of reliably measuring the parameters necessary for the accurate calculation of the absorbed dose (e.g.crystal size and shape, beam profile) and its distribution within the volume of the crystal (an issue addressed in detail in another article in this issue). While microspectrophotometry reveals that the production of various species can be quenched by the addition of scavengers, it is less clear that this observation can be translated into a significant gain in crystal dose tolerance for macromolecular crystallographers.

Simulation of Absorbed Dose Distribution In Space Materials

2004 ◽  
Vol 851 ◽  
Author(s):  
Boris A. Briskman
Keyword(s):  
Dose Distribution ◽  
Radiation Spectrum ◽  
Space Vehicle ◽  
Absorbed Dose ◽  
Numerical Characteristic ◽  
Dose Profile ◽  
Depth Dose ◽  
Space Material ◽  
Test Adequacy ◽  
Material Tests

ABSTRACTThe problems of absorbed dose distribution simulation at on-ground space material tests are discussed. Several approaches to such simulation, oriented to increase the test adequacy and economy, are analyzed. Sometimes, it is possible to use quantitative criteria of absorbed dose distribution depending on the specific space vehicle orbit. The assessment of reliable simulation of the radiation spectrum may be made, for example, by introducing a special numerical characteristic of the depth dose profile in a material - depth dose criterion. For this purpose, it is recommended to use the ratio of the exponent index of the depth dose profile (μ) to the density of the material (ρ). In the simplest form, the depth dose profile can be represented as a sum of two exponents. The first depth dose profile applies to a near-the-surface layer of 5 to 10 μm in thickness, and the second to a layer of from 10 μm up to, as a minimum, 100 μm in thickness. The reference values of μ/ρ for typical spectra of ionizing radiation are calculated.

AFARTICA

2019 ◽  
Vol 30 (3) ◽  
pp. 71-93
Author(s):  
Saubhik Paladhi ◽  
Sankhadeep Chatterjee ◽  
Takaaki Goto ◽  
Soumya Sen
Keyword(s):  
Threshold Value ◽  
Search Space ◽  
Apriori Algorithm ◽  
The Novel ◽  
Novel Technique ◽  
Frequent Item ◽  
Artificial Cell ◽  
Typical Item ◽  
Support Threshold ◽  
Frequent Item Sets

Frequent item-set mining has been exhaustively studied in the last decade. Several successful approaches have been made to identify the maximal frequent item-sets from a set of typical item-sets. The present work has introduced a novel pruning mechanism which has proved itself to be significant time efficient. The novel technique is based on the Artificial Cell Division (ACD) algorithm which has been found to be highly successful in solving tasks that involve a multi-way search of the search space. The necessity conditions of the ACD process have been modified accordingly to tackle the pruning procedure. The proposed algorithm has been compared with the apriori algorithm implemented in WEKA. Accurate experimental evaluation has been conducted and the experimental results have proved the superiority of AFARTICA over apriori algorithm. The results have also indicated that the proposed algorithm can lead to better performance when the support threshold value is more for the same set of item-sets.

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