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Search Results: 1 - 10 of 462518 matches for " Saad A. Metawe "
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Boards of Directors’ Characteristics and Firm Value: A Comparative Study between Egypt and USA  [PDF]
Wafaa F. Salem, Saad A. Metawe, Amr A. Youssef, Mohamed B. Mohamed
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105323
Purpose This research aims to compare the effect of board of directors’ characteristics on the firm’s value in Egypt as an emerging country and USA as a developed country. Five characteristics have been exposed from the literature review that may influence the enhancement of a firm’s value. In corporate governance, these characteristics are CEO duality, board independence, board size, board meetings and gender diversity. Design The model is developed and 84 Egyptian firms listed on the Egyptian stock exchange and 27 American firms listed on The Dow Jones Industrial Average (DJIA) are utilized in this research for testing this model. The research covers a six-year period (2012-2017). Five main hypotheses and ten sub-hypotheses were derived from the model. GLS regression is used to test these hypotheses. Findings The results of this research revealed that board of directors’ characteristics affects firm value almost in the same way in both Egypt and the USA. The results revealed that board independence, board meetings and gender diversity are positively and significantly related to firm value in both countries. Furthermore, it displayed that board size affected firm value in both the Egyptian and American contexts negatively and significantly. Finally, the results showed that the CEO duality has a positive effect on firm value in the Egyptian setting while it has a negative effect on the firm value in the American setting. This research contributes to the literature on the subject of how corporate governance enhances a firm’s value. Participants in the stock market would benefit from the results when assessing the board of directors’ roles in enhancing the firm’s value. Regulators will be able to use the results of this research to recognize the critical characteristics of corporate governance and to assess the governance practices of the board of directors.
The Relationship between Program Evaluation Experiences and Stakeholder Career Satisfaction  [PDF]
Saad F. Shawer, Saad A. Alkahtani
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.38196
Abstract: This paper examines the relationship between program evaluation experiences and stakeholder career satisfaction. The study employs mixed paradigms, descriptive and correlational research, qualitative evaluation, interviews, rating-scales and the parametric Pearson product-moment coefficient of correlation. Data analysis reveals differences between the descriptive and correlational findings. The descriptive findings show low faculty and program director career satisfaction at the beginning of program evaluation while concluding program evaluation experiences show a dramatically high career satisfaction. Correlational results, however, indicate not only a relatively low but also negative correlation between initial and final program evaluation experiences in career satisfaction. The study concludes a relationship exists between initial and final program evaluation experiences in stakeholder career satisfaction. The more program evaluation experiences stakeholders have, the less career dissatisfaction signs they show. Supportive program evaluation contexts lower program stakeholder negativity and encourage effective implementation and use of program evaluation.
Kidney response to L-arginine treatment of carbon tetrachloride-induced hepatic injury in mice  [PDF]
Entsar A. Saad
Natural Science (NS) , 2013, DOI: 10.4236/ns.2013.51001

Hepatic injury can be induced by the administration of carbon tetrachloride (CCl4) via the production of free radicals. The present work was initiated to investigate the kidney response to hepatic injury induced by CCl4 and its treatment by L-arginine. Female Swiss albino mice were supplied with L-arginine for 6 days (orally, 200 mg/kg body weight) prior or post to hepatic injury induction through i.p. injection with a single dose of CCl4 (20 mg/kg body weight) for 24 h. After hepatic injury induction, renal MDA content was significantly elevated while renal GSH level and the activities of antioxidant enzymes (GR, GPx, GST, catalase, and SOD) were significantly decreased. These results suggest that CCl4 not only induces hepatic injury but also induces kidney dysfunction side by side. Following the treatment with L-arginine, all levels were almost back to normal. Therefore, Larginine administration is found to be an effective protector of both liver and kidney against CCl4-intoxication.

Recent Progress of LiNbO3 Based Electrooptic Modulators with Non Return to Zero (NRZ) Coding in High Speed Photonic Networks
Abd El–Naser A. Mohamed,Mohamed A. Metawe'e Ahmed Nabih Zaki Rashed,Amira M. Bendary
International Journal of Information and Communication Technology Research , 2011,
Abstract: High frequency and broad bandwidth technology development in photonic network applications is being driven by the need to quickly process and distribute large amounts of information. Due to the high cost, complexity, and performance limitations of electronic high frequency systems, hybrid electrical-optical or all-optical systems are necessary. Current off-theshelf optical components function well at frequencies below 20 GHz, but their performance begins to degrade quickly above 40 GHz. This performance degradation results primarily from limitations in the crystalline electrooptic materials currently used to fabricate optical components. Optical components and integrated optical devices that operate at high frequency and with high bandwidth are necessary for next generation applications such as high capacity optical networks, high speed microprocessors, and high frequency wireless communications. Therefore, this paper has proposed the recent progress of LiNbO3 based Electrooptic modulator devices in high speed photonic access communication networks. We have investigated the cut-off frequency, 3-dB bandwidth, modulation bandwidth, transmission bit rates and products within NRZ coding over wide range of the affecting parameters.
Correlation of Seismic P-Wave Velocities with Engineering Parameters (N Value and Rock Quality) for Tropical Environmental Study  [PDF]
Andy A. Bery, Rosli Saad
International Journal of Geosciences (IJG) , 2012, DOI: 10.4236/ijg.2012.34075
Abstract: The physical parameters of the subsurface from the environmental site investigation are important for geoscientists and engineers to understand and very low cost-effective method, especially when combined with geophysical (seismic) and geotechnical (borehole) surveys. These parameters can be estimated from other obtained parameters. In this study, P-wave velocities of materials (soils and rocks) are studied both in the laboratory and field measurement. The obtained P-wave velocities are then compared with the engineering parameters such N values, rock quality, friction angle, relative density, velocity index, density and penetration strength from boreholes. The empirical correlations were also found in this study for selected parameters. The estimation of engineering parameters from P-wave seismic velocity values is applicable for tropical environmental study. It is found that, the ratio (VFIELD/VLAB) when squared, was numerically close to the value of percentage RQD. We found that the empirical correlation for tropical environmental study is VP = 23.605(N) - 160.43 and the regression found is 0.9315 (93.15%). Meanwhile, the empirical correlation between P-wave velocities and RQD values is found as VP = 21.951(RQD) + 0.1368 and the regression found is 0.8377 (83.77%). The correlation between apparent P-wave velocities with penetration strength for both study sites are found as and the regression coefficient is found as 0.9756. Thus, this study helps for the estimation and prediction the properties of the subsurface material (soils and rocks) especially in reducing the cost of investigation and increase the understanding of the Earth’s subsurface characterizations physical parameters.
New Generating Sets of the First Order Lane-Emden Differential Equations in N-Dimensional Radially Symmetric Polytropes  [PDF]
M. A. Sharaf, A. S. Saad
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.44090

In the present paper, two new generating sets, of homology invariant functions will be established. Moreover, by the aid of two independent homology invariant functions of each set we established the transformed first order Lane-Emden equation. The first equation for polytropic index n 1, ±depends on five free parameters, while the other equation is for, n ±∞ and depends on three free parameters.

Effectiveness of Three Bio-Rational Products and a Traditional Insecticide against Thrips spp. and Bemisia tabaci Attacking Tomato Fields in Kafr El-Sheik Governorate, Egypt  [PDF]
Hala Adel, Saad A. Gaffar, Ahmed Toman
Agricultural Sciences (AS) , 2018, DOI: 10.4236/as.2018.912108
Abstract: Destructive effects of conventional insecticides on environment have created a necessity to introduce bio-rational products in pest control programs. Effectiveness of bio-pesticide (Beauvaria bassiana), natural oil (anti-insect), a botanical extract (nimbecidine) and malathion insecticide was evaluated against Thrips spp. and Bemisia tabaci attacking tomato in Kafr El Sheik, Egypt. The trial was conducted during two successive seasons; 2017-18 in a total area of 4912 m2 cultivated with tomato cultivar zero 42. The experiment was set up in a randomized complete block design with five replications for each treatment. Yellow sticky traps were used to monitor population of both pests before and after spraying, in addition, their numbers on plants were counted. Results revealed that highest control rates of both pests were recorded after the fourth day of each spraying. Long inter-applications periods decreased effectiveness and the greatest control resulted when three consecutive sprayings were applied. Malathion achieved the highest suppression of both pests. Within the bio-rational pesticides, nimbecidine gave the greatest thrips control whereas products showed no significant difference for whiteflies. The study recommends those bio-rational compounds to join Integrated Pest Management programs of both pests in Egypt, taking into consideration spraying for 3 consecutive times with at least 5 days intervals.
Request Strategies by Second Language Learners of English: Pre- and Post-head Act Strategies
Saad Al-Gahtani,Saad A. Alkahtani
Studies in Literature and Language , 2012, DOI: 10.3968/2927
Abstract: This study investigates the speech act of request by Saudi high- and low-level learners of Australian English. All participants were asked to take part in three different role plays, which varied according to the relative power relationship between the informant and the conductor. We found that high-level learners did not considerably differ from low-level learners in terms of pre- and post-head act strategies, and request strategies; thereby indicating that proficiency level does not have a significant impact on L2 learners’ choice of pre- and post-head act strategies and request strategies. However, both groups of learners deviated from Australian English native speakers in terms of post-head act and request strategies. In light of the social variable (power) influence, it was found that power affected both groups of learners, along with the native speaking group, in terms of pre- and post-head act strategies. However, power did not have an impact on the SLL group, while it did have an effect on the high-level group, along with the native speaking group, in terms of request strategies. Thus, there is no apparent correlation between the social variable (power) and L2 learners’ use of pre- and post-head act strategies, while power positively correlates with L2 learners’ proficiency level regarding their use of request strategies. Key words: Interlanguage pragmatics; Speech act of requests; L2 learners
The Influence of Triticum asetivum Seeding Rates and Sowing Patterns on the Vegetative Characteristics in Shambat Soil under Irrigation
Saad A. Sulieman
Research Journal of Agronomy , 2012,
Abstract: Seeding rate and sowing patterns play an important role in the proper stand establishment of the growing crop, which ultimately affect the productivity at the end of the season. The selection of suitable planting method as well as the accurate rate of seeding for bread wheat is dependent upon several factors including the time of planting, soil characteristics, seed viability and availability of plant machinery. A study was conducted at the Demonstration Farm of the Faculty of Agriculture, University of Khartoum, Shambat to find out the effect of different seeding rates and planting techniques on the vegetative growth of bread wheat (Triticum aestivum L.) on the widely used cultivar Condor. The present study indicated the importance of putting more emphasis on the crop stand establishment in connection with various cultural practices.
Use of Microbiological and Chemical Methods for Assessment of Enhanced Hydrocarbon Bioremediation
Saad A. Alamri
Journal of Biological Sciences , 2009,
Abstract: A suite of microbiological tools, complementing the standard chemical analysis, was used for evaluating the effect of steam and surfactant on the rate of hydrocarbon biodegradation. The microbiological monitoring tools were soil microbial counts, soil microbial respiration, and microbial toxicity biosensor. The correlations between these parameters and with the levels of hydrocarbon residues were investigated. The overall assessment showed that bioremediation was an effective method for reducing hydrocarbon concentration. However, the monitoring tools used showed that the steam and surfactant had no significant effect in increasing the rate of hydrocarbon bioremediation or the toxicity reduction comparing with the control. Consequently, alternative techniques for enhancing hydrocarbon bioavailability must be investigated in order to establish a successful bioremediation of heavy hydrocarbons in soil. This study also demonstrated that the combination of different classes of biological and chemical tools would be more effective in monitoring hydrocarbon bioremediation that any single approach.
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