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1
Content available remote

Embedded RFID and Wireless Mesh Sensor Network Materializing Automated Production Line Monitoring

100%
Zulkifli C., Hassan H., Ismail W., Semunab S.
Acta Physica Polonica A
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2015
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vol. 128
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issue 2B
B-86-B-89
EN
In industrial manufacturing, wireless network can be used in supply chain, retail stock management, electronic security keys, and theft prevention. A proactive and cost effective solution advancement is needed in the industrial manufacturing to monitor and control output performance at a manufacturing plant. It is with this reason that the manufacturers require an efficient communication and real time feedback to maximize uptime and improve productivity. Consistent with the future market of new technologies deployment this invention proposes a new complete solution method and architecture of embedded active radio frequency identification with counter system through wireless mesh sensor network platform and smart data processing adopted through web-based monitoring system for industrial automation. The ability of the developed system to function in machine-to-machine wireless communication and the adoption of web-based monitoring and data centralization contributes improvement in reducing errors with human intervention. In this paper we discuss the framework approach of a smart web-based monitoring and data acquisition system on wireless mesh sensor network platform. The evaluations and measurements have been conducted in real world environments which are conducted at selected industrial production factory.
2
Content available remote

Spectroscopic Studies on Distorted Structure Nanomolecules by Using Lie Algebraic Model

80%
Rao Karumuri S., Girija Sravani K., Vijayshekar J., Reddy L.
Acta Physica Polonica A
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2012
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vol. 122
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issue 1
49-52
EN
We have applied Lie algebraic model to distorted structure molecules to determine the vibrational spectra of different stretching and bending vibrational modes. The the Lie algebraic model of the Hamiltonian expression is H = E_0 + ∑_{i = 1}^{n} A_{i} C_{i} + ∑_{i < j}^{n} A_{ij} C_{ij} + ∑_{i < j}^{n} λ_{ij} M_{ij}}. By using the Lie algebraic method, the stretching vibrational energies of fullerene (C_{80}) are calculated in the one-dimensional [U(2)] framework. Using the model Hamiltonian so constructed, we have calculated the local mode vibrational energy levels of the fullerene (C_{80}) accurately.
3
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Simple Microwave Technique for Non-Destructive Testing of Electrical Properties of Magnetized Materials

80%
Laurinavičius L.
Acta Physica Polonica A
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2014
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vol. 125
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issue 2
205-207
EN
New technologies allow obtain low-dimensional structures, thin films, monocrystal samples of modern semiconductor materials. Electrical parameters of semiconductors should be tested by non-destructive simple methods to provide the high quality of new electronic devices. The principle of operation of proposed compact microwave meter is based on magnetic vortex oscillation and magnetoplasmic wave excitation technique in semiconductors placed in strong magnetic field. A high frequency field is interacting with charge carriers of semiconductor sample and contactless measurements of density N and mobility μ of free charge carriers of semiconductors can be realized. Microwave technique for non-destructive testing electrical properties of semiconductor materials is described. Simple microwave meter consists of constant magnetic field source, high frequency generator, transmitting-receiving antenna and indicator. In semiconductor specimen placed in constant and alternating magnetic fields a vortex current and magnetoplasmic microwave are excited. The response signals are measured to find a value of density N and mobility μ of free charge carriers in testing materials. Experimental parameters of measured n-InSb, CdHgTe, BiSb specimens are presented.
4
Content available remote

A Study of Vibrational Spectra of Fullerene C_{70} and~C_{80}: An Algebraic Approach

80%
Sen R., Kalyan A., Subhra Paul R., Sarkar N., Bhattacharjee R.
Acta Physica Polonica A
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2011
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vol. 120
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issue 3
407-411
EN
Using the Lie algebraic method, the stretching vibrational energies of fullerenes C_{70} and C_{80} are calculated in the one-dimensional U(2) framework. By constructing the model Hamiltonian with the help of Casimir and Majorana invariant operators in this frame work, we calculated the local mode vibrational energy levels of the fullerenes C_{70} and C_{80}.
5
Content available remote

Closed-Loop INS/TACAN/ALT Positioning System

80%
Kaniewski P.
Acta Physica Polonica A
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2008
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vol. 114
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issue 6A
A-133-A-138
EN
The paper presents a design of aircraft integrated positioning system, composed of INS, TACAN and altimeter (ALT). This paper describes a modified, closed-loop version of INS/TACAN/ALT system and compares it to the previous design. The system is integrated according to the scheme of compensation with feed-backward INS correction and it employs a complementary extended Kalman filter. The paper includes chosen results of simulations obtained for the open-loop and closed-loop INS/TACAN/ALT systems and discusses advantages of the new design.
6
Content available remote

The Characterization of Defects in Multi-Layered Composite Materials by Thermal Tomography Methods

70%
Swiderski W.
Acta Physica Polonica A
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2009
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vol. 115
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issue 4
800-804
EN
The idea of thermal tomography is slicing a work piece for some in-depth layers which exhibit the distribution of thermal properties in materials by the analogy with X-ray tomography. Thermal tomography is based on the analysis of the surface temperature evolution which follows thermal stimulation of test samples. In this paper, some experimental results of applying the dynamic thermal tomography algorithm to a carbon fibre reinforced plastic sample are presented. The efficiency of few data processing methods is discussed.
7
Content available remote

Studying Efficiency of NDE Techniques Applied to Composite Materials in Aerospace Applications

70%
Dragan K., Swiderski W.
Acta Physica Polonica A
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2010
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vol. 117
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issue 5
878-883
EN
This work presents the modern approach to the detection of various types of defects in composite structures used in aerospace. In such structures, including glass reinforced plastics and carbon reinforced plastics, different failure modes could occur at a manufacturing stage and during service life. Defects are connected with inadequate technology, poor workmanship, cycling fatigue loads, impact damage and environmental conditions. The main types of defects are delaminations, disbonds, foreign object inclusions and porosity. To detect such defects, several non destructive evaluation techniques can be applied, merely to mention ultrasonic, low frequency acoustics, infrared thermography and shearography. The use of multimode non destructive evaluation techniques enables characterization of defects which cannot be detected by using single non destructive evaluation methods. This paper demonstrates the necessity of using non destructive evaluation methods for the implementation of quality control and maintenance procedures while servicing aerospace composite elements.
8
Content available remote

Design and Production Considerations on a Button Type Beam Position Monitor for Use of TAC-TARLA Facility

70%
Tural Gundogan M., Kaya C., Yavas O.
Acta Physica Polonica A
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2017
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vol. 132
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issue 4
1333-1339
EN
Turkish Accelerator and Radiation Laboratory in Ankara (TARLA) facility is a superconducting linac-based infrared free-electron laser light source in the frame of Turkish Accelerator Center (TAC). Construction of the facility premises was completed in 2009, with a continued progress of hardware and infrastructure installation until today. In this respect, a button type beam position monitor (BPM) is designed, produced and tested for use of TARLA facility. Antenna simulations and mechanical design studies based on TARLA electron beam parameters are carried out by the software computer simulation technology. In this paper, its design and production highlights are discussed in detail, and the original results are summarized.
9
Content available remote

Investigation of H_2:CH_4 Plasma Composition by Means of Spatially Resolved Optical Spectroscopy

61%
Bogdanowicz R.
Acta Physica Polonica A
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2008
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vol. 114
|
issue 6A
A-33-A-38
EN
The system based on spatially resolved optical emission spectroscopy dedicated for in situ diagnostics of plasma assisted CVD processes is presented in this paper. Measurement system coupled with chemical vapour deposition chamber by dedicated fiber-optic paths enables investigation of spatial distribution of species densities (H_x, H^+, CH, CH^+) during chemical vapour deposition process. Experiments were performed for a various gas inlet configuration at range of microwave power up to 800 W. Spatially resolved optical spectroscopy results showed that inlet configuration based on injecting hydrogen in ECR region and methane in substrate area is the most efficient for H^+ and CH_{3}^{+} excitation. The designed prototype of the spatially resolved optical spectroscopy system enables the high-sensitivity measurements of concentration of the species in the microwave plasma and can be used for optimisation of diamond-like carbon synthesis.
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