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Detection of Fingerprint using He-Ne and Diode Lasers on Aluminium and Glass Surfaces
Ali Abdelrhman Saeed Marouf,
Malka Aldar Daood Abdalrheim Daood
Issue:
Volume 5, Issue 4, December 2019
Pages:
37-40
Received:
1 October 2019
Accepted:
22 October 2019
Published:
31 October 2019
Abstract: There are different latent fingerprint recovering techniques, physical and chemical techniques are available for the development of latent fingerprints. Fingerprints detection requires high sensitivity, which is provided by luminescence and appropriate physical and chemical treatments. Photoluminescence detection of latent fingerprints has over the last quarter-century brought about a new level of fingerprint detection sensitivity. Fingerprints have many uses, a chemical solution usually used to detect fingerprints but it takes time. In this paper, we were operating with low-power lasers, He-Ne laser with output power 1mmW and wavelength 632.8nm and diode laser with output power 5mmW and wavelength 532nm to detect fingerprints on an aluminium and glass surfaces. Fingerprints were exposed by the laser beam through a convex lens with focal length 5mm then a digital camera was used to record luminescence from fingerprint. The revealed results show clear images for the fingerprints using two types of lasers He-Ne and diode and appearing its characteristics on different surfaces obviously. Using laser sources to detect fingerprints is a simple method using low-level lasers without chemicals, in a short period of time, with low cost and gives good results.
Abstract: There are different latent fingerprint recovering techniques, physical and chemical techniques are available for the development of latent fingerprints. Fingerprints detection requires high sensitivity, which is provided by luminescence and appropriate physical and chemical treatments. Photoluminescence detection of latent fingerprints has over the...
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Evaluation of Radioactivity Level and Its Radiological Impact in Soil Samples Around Transmission Company of Nigeria
Abiodun Odunlami Adegunwa,
Odunayo Timothy Ore,
Tobi Ezekiel Osadare,
Victoria Olamide Ogunlowo
Issue:
Volume 5, Issue 4, December 2019
Pages:
41-46
Received:
7 October 2019
Accepted:
29 October 2019
Published:
5 November 2019
Abstract: The aim of this study is to estimate the activity concentrations and radiological assessment of soils around high-tension cables, Transmission company of Nigeria, Osogbo, Nigeria. Surface and control soils were obtained around the high-tension cables and from areas far away from the sampling points, respectively. Their radioactivity levels were determined using gamma ray spectrometer. The results showed that the mean activity of the identified radionuclides, 40K, 238U and 232Th are 223.59±11.98, 15.39±1.95 and 4.54±0.28 Bq/kg respectively, in the studied soils while the control soils exhibited activity concentrations of 40K, 238U and 232Th, as 6.22±0.34, 11.58±1.55 and 0.50±0.03 Bq/kg respectively. The radiological indices, ADR (absorbed dose rate), AED (annual effective dose equivalent), Hin (internal hazard index), Hex (external hazard index), AGDE (annual gonadal dose equivalent), Iγr (representative gamma index) and Raeq (radium equivalent) have values of 19.65 nGy/hr, 0.17 mSv/yr, 0.14 Bq/kg, 0.10 Bq/kg, 140.77 µsvy-1, 0.30 and 39.64 respectively. These results revealed that the studied soils exhibited low gamma radiation. Long-term exposure to these radionuclides could pose health threats and is therefore discouraged.
Abstract: The aim of this study is to estimate the activity concentrations and radiological assessment of soils around high-tension cables, Transmission company of Nigeria, Osogbo, Nigeria. Surface and control soils were obtained around the high-tension cables and from areas far away from the sampling points, respectively. Their radioactivity levels were det...
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Broad Beam and Gamma Spectrometric Parameters of Some Granites
Abdul-Hamid Hussein El-Kateb,
Asmaa Sophy Seif El-Nasr,
Mahmoud Mohamed Bakry
Issue:
Volume 5, Issue 4, December 2019
Pages:
47-52
Received:
3 October 2019
Accepted:
31 October 2019
Published:
7 November 2019
Abstract: Using a g-ray spectrometer with 3"x3" NaI (Tl) detector the linear and mass attenuation coefficients (m/r) and (mb/r) from narrow and broad beam experimental arrangements have been measured and compared with the theoretical values for the granites Double Black, DB, from India, Rose Al-Howdy, RH, from Aswan, south Egypt and Bianco Halayeb, BK, from Halayeb, south Egypt. The photon energies lei in the range 0.081-1.332 MeV from the radioisotopes 133Ba, 137Cs and 60Co. The build-up factor B, the effective atomic number Zeff, and the total atomic cross-section st for the granites as a function of photon energy were determined and discussed. It is found that the experimental results are consistent, within the experimental errors, with the theoretical values. The effective atomic number Zeff, the build-up factor B, and the total atomic cross-section st were calculated and discussed as a function of photon energy. The B factor is large at low gamma energy and not sensitive for discrimination between the granites. The maximum Zeff corresponds to minimum B factor at the photon energy 0.356 MeV. The broad beam geometry is more efficient than narrow beam geometry in characterizing the shielding properties of the studied granites.
Abstract: Using a g-ray spectrometer with 3"x3" NaI (Tl) detector the linear and mass attenuation coefficients (m/r) and (mb/r) from narrow and broad beam experimental arrangements have been measured and compared with the theoretical values for the granites Double Black, DB, from India, Rose Al-Howdy, RH, from Aswan, south Egypt and Bianco Halayeb, BK, from ...
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