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Search Results: 1 - 10 of 1683 matches for " Saad Subair "
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Assessing the Usability of Institutions Web Pages  [PDF]
Saad Subair
International Journal of Internet and Distributed Systems (IJIDS) , 2014, DOI: 10.4236/ijids.2014.23003
Abstract: The usability of the web pages is assessed using some statistical models. Researchers argue that many usability results and recommendations lack empirical and experimental data. Universities web pages are chosen as subjects for this work. Series of experiments have been conducted to investigate into the usability and design of the universities web pages. Prototype web pages have been developed according to the structured methodologies of web pages design and development. Four universities web pages were evaluated together with the prototype web pages using a questionnaire which was designed according to the Human Computer Interactions (HCI) concepts. The data collected was analyzed using correlation and regression models. The correlation analysis showed that there were significant positive and negative correlations between many items. The regression analysis revealed that the most significant factors (items) that contributed to the best model of the universities web pages design and usability were: multimedia in the web pages, the web pages icons (alone) organization and design, and graphics attractiveness. The results showed some of the limitations of some heuristics used in conventional interface system design and proposed some additional heuristics in web pages design and usability.
Statistical Models for Web Pages Usability  [PDF]
Saad Subair, Hussah AlEisa
Journal of Data Analysis and Information Processing (JDAIP) , 2016, DOI: 10.4236/jdaip.2016.41004
Abstract: The usability of an interface is a fundamental issue to elucidate. Many researchers argued that many usability results and recommendations lack empirical and experimental data. In this research, the usability of the web pages is evaluated using several carefully selected statistical models. Universities web pages are chosen as subjects for this work for ease of comparison and ease of collecting data. A series of experiments has been conducted to investigate into the usability and design of the universities web pages. Prototype web pages have been developed according to the structured methodologies of web pages design and usability. Universities web pages were evaluated together with the prototype web pages using a questionnaire which was designed according to the Human Computer Interactions (HCI) heuristics. Nine (users) respondents’ variables and 14 web pages variables (items) were studied. Stringent statistical analysis was adopted to extract the required information to form the data acquired, and augmented interpretation of the statistical results was followed. The results showed that the analysis of variance (ANOVA) procedure showed there were significant differences among the universities web pages regarding most of the 23 items studied. Duncan Multiple Range Test (DMRT) showed that the prototype usability performed significantly better regarding most of the items. The correlation analysis showed significant positive and negative correlations between many items. The regression analysis revealed that the most significant factors (items) that contributed to the best model of the universities web pages design and usability were: multimedia in the web pages, the web pages icons (alone) organisation and design, and graphics attractiveness. The results showed some of the limitations of some heuristics used in conventional interface systems design and proposed some additional heuristics in web pages design and usability.
Security Framework for Distributed Database System  [PDF]
Allajabu Dafalla Khamis, Saad Subair
Journal of Data Analysis and Information Processing (JDAIP) , 2019, DOI: 10.4236/jdaip.2019.71001
Abstract: This research aims to study various Symmetrical Algorithms, while the main objective of this study is to find out a suitable algorithm for the encryption of any specific size of text file where the experiment of each algorithm is based on encryption of different sizes of the text files, which are in “10 KB to 5 MB”, and also to calculate the time duration that each algorithm takes to encrypt or to decrypt the particular size of each text file. There are many types of encryption algorithm, which can be used to encrypt the computerized information in different Organizations, whose all algorithms can encrypt and decrypt any size of text file, but the time duration of each Algorithm during the encryption or decryption process of specific file size is not fixed. Some of the algorithms are suitable for encryption of specific ranges of the file size, or some of algorithms are functional while encryption small size of files, and others algorithms are functional for encryption of big size of text files, based on the time duration disparity among symmetric algorithms during encryption of text files. In this study five symmetrical algorithms are merged in one program using classes and concept of inheritance in the form that if encryption is needed, the program will select the file and it checks the size of the text file. After this process the program automatically will select the suitable encryption algorithm to encrypt the specific text file according to the range of the file size. Knowing that the file size before or after encryption will not change or is stable, in this case of the decryption algorithm will apply the same process of encryption while decrypting files, the program of encryption and decryption code will write using visual Studio 2013. The result will be analyzed with R program (R software), the cipher text will appear in the format of UTF8 which means Unicode Transformation Format, “8” Means “8” bits to represent a character, the size format that will apply in the program will be in format of KB (kilo Byte).
A Hybrid Classifier for Protein Secondary Structure Prediction
Saad Osman Abdalla Subair,Safaai Deris,Mohd Saberi Mohamad
Information Technology Journal , 2005,
Abstract: Advances in molecular biology in the last few decades and the availability of equipment in this field lead to the rapid sequencing of considerable genomes of several species. These large genome sequencing projects generate huge number of protein sequences in their primary structures that are difficult for conventional molecular biology laboratory techniques like X-ray crystallography and NMR to determine their corresponding 3D structures. Protein secondary structure prediction is a fundamental step in determining the 3D structure of a protein. In this study a new method for predicting protein secondary structure from amino acid sequences has been proposed and implemented. The prediction method was analyzed together with other five well known prediction methods in this domain to allow easy comparison and clear conclusions. Cuff and Barton 513 protein data set was used in training and testing the prediction methods under the same hardware, platforms and environments. The newly developed method utilizes the knowledge of the GORV information theory and the power of the neural networks to classify a novel protein sequence in one of its three secondary structures classes. The newly developed method (NN-GORV) was rigorously tested together with the other methods and observed outperformed the GOR-V methods by 7.4% Q3 and the neural networks method (NN-II) by 5.6% Q3 accuracy. The Mathews Correlation Coefficients (MCC) showed that NN-GORV secondary structure predicted states are strongly related to the observed secondary structure states.
Participation of Local Leaders in Agricultural Development : A Case Study of Kgatleng District of Botswana
Stephen Kayode Subair
The Social Sciences , 2013,
Abstract: The study was conducted to determine the extent of participation of Local Leaders in agricultural development in Kgatleng district of Botswana. This is a descriptive census study in which a questionnaire was used to collect data .The target population of the study was all the fourty- one (41) local leaders who attended a training course at Sebele Farmers Training center, Gaborone on October 25-30, 2004. The questionnaire administered was developed by the researcher with the help of some literature to capture the objectives of the study. The questionnaire was validated and the reliability coefficient determined using Crombach alpha formula and was found to be between 0.78-0.93. The data collected were analyzed using frequencies and percentages to interpret the personal characteristics of the respondents. Means and standard deviation and rankings were used to interpret the responses of the local leaders regarding their participation in agricultural development. Results revealed that only few areas covered by the local leaders during their training sessions were put to use in their respective farms; while the knowledge and skills gained as a result of their training sessions were rarely taught to other farmers as expected of them. The personal characteristics of the local leaders did not influence their responses towards their training activities. The problems hindering the local leaders from transferring the knowledge and skills acquired during their training sessions to their colleagues included lack of resources on the part of the local leaders and their colleagues, illiteracy, long distances between the location of residences of the local leaders and other colleagues and lack of interest on the part of the farmers.
Factors Promoting Self-Motivating Behaviours at Work Among Middle Level Management Staff of the Ministry of Agriculture (MoA) Botswana
S.K. Subair
Agricultural Journal , 2013,
Abstract: A descriptive type of research was conducted in July 2006 to determine the factors promoting self-motivating behaviours at work among the middle level management staff (Managers) of the Ministry of Agriculture (MoA), Botswana. The study included all the 30 middle level managerial staff of the Ministry of Agriculture. A structured questionnaire was used to collect information on the personal characteristics of the respondents. Also, the questionnaire consisted of statements anchored on a 5 point likert type rating scale. The statements were developed from literature and represented general self-motivating behaviours among staff members of any organization. The statements were validated and the reliability estimate calculated and found to be 0.93, indicating a good degree of reliability. Frame error and selection error were catered for; sampling error was not a threat since all the target population for the study 30 participated in the study. The data collected were analysed using frequencies and percentages to describe the personal characteristic of the respondents. means, standard deviations and ranks were used to describe the factors promoting self-motivating behaviours at work place among the respondents. Correlation coefficients were used to describe the relationship between some selected personal characteristics and of the managers towards factors promoting self-motivating behaviours at work. Results revealed that Male dominated the managerial cadre of the MoA staff. Also, the managers were mostly Diploma graduates, having between 11-25 years of experience and mostly within the age bracket of 31-40 years. Majority of the managers responded favourably in varying degrees to the factors promoting self-motivating behaviours at work. Also, most of the factors promoting self-motivating behaviours attracted a negligible relationship between the personal characteristics of the managers and the self-motivating behaviours examined in the study.
Perception of Agricultural Extension Officers Regarding the Policies Established by Botswana Ministry of Agriculture to Strengthen Agricultural Extension Services in Botswana
Stephen Kayode Subair,K. Mabusa
Pakistan Journal of Social Sciences , 2012,
Abstract: A survey was conducted in November 2006 to determine the perception of agricultural extension officers towards the policies established by the Botswana Ministry of Agriculture to strengthen agricultural extension services in the country.. The study was a descriptive study which used questionnaire to solicit information from 52 randomly selected extension officers. The formula developed by Krajcie and Morgan (1970, was used to select the 52 respondents from 60 target population of the study. The instrument for data collection was developed by the researchers using some literature. The instrument was validated, by 3 Lectures from Botswana College of Agriculture. The reliability test was computed and found to be 0.89, indicating that the instrument was reliable enough for use. The data collected were analyzed using frequencies and percentages, means and standard deviations and ranking. Results revealed that the extension officers were generally satisfied with the use of the established policies on objectives, principles, extension teaching methods and teaching materials and equipment that should be used to execute the extension programs of the Ministry of Agriculture in Botswana.
Perception of Botswana College of Agriculture (BCA) Lecturers Toward Consumption of Genetically Modified Foods (GMF) in Botswana
Stephen Kayode Subair,Ithuteng Moagisi
Agricultural Journal , 2013,
Abstract: A survey was conducted in August, 2006 to determine the perception of BCA Lecturers regarding the consumption of genetically modified foods in Botswana and also to determine the relationship between the perception of the respondents and their selected personal characteristics. This was a descriptive census study with all the 67 BCA Lecturers as the target population. Due to some reasons, a total of 47 Lecturers (71% of the target population) eventually participated in the study. Data were collected using a questionnaire. The questionnaire was developed by the researcher with the help of some literature. The questionnaire was validated by three researchers from a nearby Agricultural Research Station. The reliability estimate of the instrument was calculated and found to be 0.88, indicating a good degree of reliability. The data collected were analyzed using frequencies and percentages to interpret the personal characteristics of the respondents. Means, standard deviations and rankings were used to interpret the perception of Lecturers regarding the use of GMF in Botswana. Results revealed that respondents did not agree with the use of GMF in Botswana. In most of the cases, negligible relationships were found between the perception statements and the selected personal characteristics of respondents, indicating that their personal characteristics did not influence their responses towards the consumption of GMF in Botswana.
Saltwater Intrusion in Jizan Coastal Zone, Southwest Saudi Arabia, Inferred from Geoelectric Resistivity Survey  [PDF]
Saad Mogren
International Journal of Geosciences (IJG) , 2015, DOI: 10.4236/ijg.2015.63022
Abstract: This work focuses on the causes of water quality deterioration in the coastal plain of Jizan area, southwest Saudi Arabia using vertical electrical sounding (VES) surveys. Schlumberger electrode array is used in the study with the current electrode spacing ranging from 400 to 600 m to delineate the thickness of the shallow aquifer and its possible interaction with the sea water. The differences in resistivity are associated with the variations in lithology and groundwater saturation and salinity. The interpretation of VES curves reveals low resistivity zones characterizing the study area. These zones reflect saline water intrusion in the coastal aquifer. Generally, it is observed that the resistivity of saturated zone decreases towards the sea, indicating the influence of seawater. Based on the interpretation of the constructed resistivity pseudo-sections and 1-D sequential inversion models, three factors are identified to control the seawater intrusion into the shallow groundwater aquifers: 1) presence of faults that contribute extensively in the seawater intrusion as the seawater invades the coastal aquifers through the crushed rocks in fault zones related to the Red Sea rifting, 2) over-withdrawal of groundwater from the coastal aquifers, resulting in saline water intrusion from the sea into the freshwater aquifer, and 3) the lithological variation where the alluvial sediments of the ancient buried wadi (dry valley) channels provide potential pathways for saltwater intrusion and make a hydraulic connection between the aquifer and the sea water.
Analysis of the Performance Indicators of the PV Power System  [PDF]
Saad Odeh
Journal of Power and Energy Engineering (JPEE) , 2018, DOI: 10.4236/jpee.2018.66005
Abstract: The energy assessment of the PV power systems is carried out by using different types of performance indicators that benchmark the output of these systems against the PV panel maximum output at hypothetical operation conditions. In this paper, a comparative analysis of six types of performance indicators is conducted and a new performance indicator which considers PV panel slope and orientation is proposed. The proposed indicator is benchmarking the PV system actual output against the maximum output of the same system if it would operate in two axis tracking mode. The proposed performance indicator is used to develop a friendly user calculator of PV system output that can be used by, energy providers and PV system installers to evaluate the output of the PV grid connect network. The advantage of the developed calculator is high-lighted by a case study that estimates energy capacity of different residential rooftop PV systems installed in a residential suburb in Sydney.
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