Deep Learning in Satellite Imaging: A Survey

Authors : Ibrahim Goni ; Asabe S. Ahmadu ; Yusuf M. Malgwi

DOI : doi.org/10.47752/sjsr.42.45.51

Abstract:
In recent time deep learning has been extensively applied in satellite image analysis, the aim of this work was to conduct a thorough review on the application of deep learning in satellite imaging, moreover we have also provide a detail description regarding the principles of satellite image capturing, in addition to the mathematical models of image processing techniques used in satellite images such as image denoising, image filtering, image segmentation and histogram equalization. We have also discuss some of the aspect of deep learning but not in deep. Finally we have pave away for further research directions both in satellite imaging and deep learning.

Concentrations of Ground-Level Ozone on Petroleum Filling Stations in Urban West Region- Zanzibar

Authors : Saadat Soud Mohamed ; Abdul Ali Juma Mohamed ; Chukwuma J. Okafor

DOI : doi.org/10.47752/sjsr.42.37.44

Abstract:
Ambient concentration of ground-level ozone was quantified from 14 petroleum filling stations in Urban and West districts allocated in urban west region Zanzibar between August and November 2019. In situ measurement was conducted for two separate sessions that involved before noon and afternoon in each day in the field using BH-4S Portable multi-gas detector. The analyzed data revealed both temporary and spatial variations of measured parameters. During phase1, the range of ozone was 4.8- 0.6 ppm. During phase2, the range of ozone was 14.2 - 4.5 ppm. The mean values recorded for ozone ranged from 0.6 ppm to 4.8 ppm for phase1, and from 4.5 ppm to 14.2 ppm for phase2. This study revealed that, ground-level ozone is at a point that calls attention tothe environment and health sectors.

Using of Clay as Heterogeneous Catalysts for Organic Syntheses; A Review

Authors : Enas A. Almadani ; Farah Haron ; Dala M Ibrahim

DOI : doi.org/10.47752/sjsr.42.32.36

Abstract:
Clay and clay modified catalysts have been widely used to catalyze various types of organic reactions such as esterification reactions, isomerization reactions, cyclization reactions, oxidation of alcohols, dehydrogenation, epoxidation and several more. Due to its favorable properties such as low cost, thermal stability, selectivity, large surface area, ion exchange capacity, easily separated, as well as environmental friendly. This paper reviewed some recent studies on the using of clay and modified clay as catalyst for the production of esters.