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Faisal Abdullah

Universitas Syiah Kuala

Author-ID : 2756249

Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Neuroscience Physics Social Sciences Other

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Evaluation of Vegetables Shelf Life Using Multispectral Scattering Method Faisal Abdullah
Jurnal Natural Volume 14, Number 1, March 2014
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (214.633 KB)

This study was aimed to develop an algorithm based on the optical properties of some selected vegetables which can be used to evaluate shelf- life of some selected vegetables using multispectral scattering method. Multispectral algorithm will be developed to correlate light backscattering radiation of a vegetable with the level of shelf life conditions. The partial least square (PLS) regression models using three wavelengths were used to estimate the shelf life changes of the vegetable samples. The results showed that the developed multispectral scattering algorithms can be used to evaluate the shelf life changes of Chinese cabbage, carrot, chili, and cucumber using wavelengths at 880, 890, and 950 nm as the light sources respectively. The calibration and validation processes of the algorithm produced good accuracy measurements as represented by high R2 values and low Root Mean Square Error (RMSE). For the Chinese cabbage and the carrot samples, the algorithm was not effective to predict the changes of the shelf life because the responses was kept increasing even after the samples were dried and deteriorated. Also, the algorithms cannot be used to evaluate the shelf life changes of the onion because the calibration and validation processes produced low accuracy of measurements.

Application of gravity method in cultural harritage Cot Sidi Abdullah Site, Samudera Pasai, North Aceh NOVIA PURNAMA SARI; TOMI AFRIZAL; FAISAL ABDULLAH; NAZLI ISMAIL
Jurnal Natural Volume 20 Number 3, October 2020
Publisher : Universitas Syiah Kuala

The gravity method was applied to the cultural heritage site of Cot Sidi Abdullah in Kuta Krueng Village, Samudera Pasai District, North Aceh Regency for mapping and reconstruction structure of the cultural heritage site and distribution of artifact objects buried in the subsurface. Data measurement was carried out in a grid with 2 meters spacing between the points to cover all area of the cultural heritage site. The model of gravity anomaly distribution from the vertical derivative results shows a square pattern of anomaly gravity surrounding the measurement areas. This anomaly pattern is thought as a response from the remaining walls of the site structure which are buried in the subsurface with anomalous values between 0.02 mGal/m - 0.08 mGal/m. The estimation of the walls of the archaeological site from the anomalous response to this gravity value is proved by the excavation results in the southern part of the study area. While the minimum value of the vertical derivative filter (-0.06 mGal/m to - 0.01 mGal/m) is the response from the area around the archaeological site. The reconstruction results of the site based on the estimation of the walls with a length of ± 45 meters and a width of ± 40 meters.

Application of gravity method in cultural harritage Cot Sidi Abdullah Site, Samudera Pasai, North Aceh NOVIA PURNAMA SARI; TOMI AFRIZAL; FAISAL ABDULLAH; NAZLI ISMAIL
Jurnal Natural Volume 20 Number 3, October 2020
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v20i3.16920

The gravity method was applied to the cultural heritage site of Cot Sidi Abdullah in Kuta Krueng Village, Samudera Pasai District, North Aceh Regency for mapping and reconstruction structure of the cultural heritage site and distribution of artifact objects buried in the subsurface. Data measurement was carried out in a grid with 2 meters spacing between the points to cover all area of the cultural heritage site. The model of gravity anomaly distribution from the vertical derivative results shows a square pattern of anomaly gravity surrounding the measurement areas. This anomaly pattern is thought as a response from the remaining walls of the site structure which are buried in the subsurface with anomalous values between 0.02 mGal/m - 0.08 mGal/m. The estimation of the walls of the archaeological site from the anomalous response to this gravity value is proved by the excavation results in the southern part of the study area. While the minimum value of the vertical derivative filter (-0.06 mGal/m to - 0.01 mGal/m) is the response from the area around the archaeological site. The reconstruction results of the site based on the estimation of the walls with a length of ± 45 meters and a width of ± 40 meters.

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