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Chinedu Eugenia Anumudu, Mal-Imran Yasin, Ahmad Ghazali Akmar and Muhammad Pauzi Latif

Abstract

The review paper intensively explored immediacy factors influencing communication satisfaction through asynchronous computer mediated communication mediums. Immediacy is one of the constructs of social presence theory deemed capable of compelling communication satisfaction on asynchronous computer mediated communications. It has been established in numerous related studies conducted on asynchronous virtual mediated channels. However, little or no consideration seemed to have been given to exploring these immediacy factors towards ascertaining communication satisfaction via email, as one of the asynchronous mediated communications. The need to study this via email is essential, especially towards making it more efficient since it still remained the third means of communication predominantly used for dispatching corporate issues. In this review, prompt feedback, approachability and similarity personality were the dimensions of immediacy explored in relations to the effectiveness towards attaining communication satisfaction on asynchronous virtual communications. The findings showed that these dimensions examined were capable of inspiring immediacy towards achieving communication on asynchronous computer mediated channels. Therefore, it is expected that these may equally motivate communication satisfaction via email as one of asynchronous virtual mediums. It also showed that most of the studies so far conducted were dominated by qualitative and mixed-method approaches. Few quantitative studies encountered in the review appeared lacking the capacity of generalizing the outcomes due to respondents’ poor turnout rate and inadequate sample sizes issues. Thus, empirical quantitative studies are still needed via email mode of interaction in order to resolve these issues and for revalidating the outcomes of the review.

Open access

Muhammad Ajab, Imtiaz Ahmad Taj, Imran Shafi and Srdjan Stankovic

Abstract

In this paper, a modified form of the Gabor Wigner Transform (GWT) has been proposed. It is based on adaptive thresholding in the Gabor Transform (GT) and Wigner Distribution (WD). The modified GWT combines the advantages of both GT and WD and proves itself as a powerful tool for analyzing multi-component signals. Performance analyses of the proposed distribution are tested on the examples, show high resolution and crossterms suppression. To exploit the strengths of GWT, the signal synthesis technique is used to extract amplitude varying auto-components of a multi-component signal. The proposed technique improves the readability of GWT and proves advantages of combined effects of these signal processing techniques.

Open access

Wajid Ali, Waheed Ur Rehman, Mohammad Younas, Muhammad Imran Ahmad and Saeed Gul

Abstract

The present case study is focused on performance evaluation of a Reverse Osmosis (RO) membrane based pilot plant to treat the ground/surface drinking water sources polluted by flood, rivers and/or canals. The RO plant was designed, fabricated and then operated with polluted water. Two feed water samples having a TDS of 2.000 mg · L−1 and 10.000 mg · L−1 respectively, were taken and analyzed for physical, chemical and microbiological contaminants. The RO plant was run once through over a span of 100 hrs at an operating pressure of 15 bar. TDS rejections were found to be more than 94% while permeate flux was measured to be 25.82 L · m−2 · hr−1 to 40.55 L · m−2 · hr−1. Results show that RO plant has a potential to remove physical, chemical and microbiological contaminants like Total Coliform and E. Coli in one step.