23 research outputs found
Panoramic radiography as an aid in diagnosing mandibular fractures
No full textA retrospective study was undertaken to determine the reliability of the panoramic radiograph (PR) in the evaluation of fractures in the mandible. Among the 62 fractures present in the 52 patients included in this study, 57 fractures (92%) were recognized in the panoramic radiographs, while 5 fractures (8%) were missed and detected in other types of plain films. Four out of the fifty-two patients included in the study had no PR made as the primary diagnostic radiograph was taken for various medical problems. It was concluded that PR provides useful diagnostic information in evaluating mandibular fracture, however, limitations were noted. Other plain films may be needed when PR is negative and there is clinical evidence that a fracture exists.Corresponding Author:
Dr. Asmaa A. Al-Musaed, lecturer, Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, King Saud University, P.O. Box 50771, Riyadh 11533 Saudi Arabia. Email
SAFE HAVEN ASSETS: ARE THEY STILL SAFE DURING COVID-19 PANDEMIC PERIOD?
No full textDuring political, financial, and economic turmoil periods investors tend to flee toward what is called safe haven assets such as gold, Swiss franc and lately, Bitcoin. While previous literature supports such assumption, these studies were based on crises that faced certain geographic locations. The coronavirus pandemic on the other hand is a global crisis that affects the whole world. This study aims to examine the validity of the assumption that the Swiss franc, gold, and Bitcoin would still act as safe haven assets during Covid-19 pandemic period. Results obtained from this study shows that Swiss franc, gold had a positive returns during the study period which is in line with safe haven assets characteristics, but these returns were not caused by the stock markets negative returns. Bitcoin on the other hand showed negative returns during the study period and statistically significant positive relation with S&P 500 returns indicating that Bitcoin cannot be used as a safe haven asset. JEL: G10; G11; G15 Article visualizations
Prediction of Critical Pipe Running Speed During Tripping in Drilling Operations
No full textBlowout and loss of circulation are two serious accidents that can happen while drilling without the control on drillstring running speed during tripping operations. Exceeding the critical running speed during tripping-out (high swabbing pressure) and lack of control of mud rheology are the main causes for blowout. Also, exceeding the critical running speed while tripping-in (high surge pressure) and lack of control of mud rheology are the main causes for loss of circulation. Many factors which affect surge and swab pressures must be precisely selected in order to control kicks or blowouts and to prevent loss of circulation. Prediction ofthe critical pipe running-in and -out speeds during tripping operations is therefore very important. This can be done by the evaluation of several basic fluid flow equations. A computer program has been developed to simplify these ca1culations. The developed program requires fairly simple input data which can be measured in laboratory in addition to hole and drillstring dimensions. The output of this program then is transformed into graphical form from which the safe running-in and -out speeds during tripping can be predicted. As an alternative and direct way to predict the critical pipe running speed during tripping operations two correlations have been developed. These colTelations account for the govel11ing factors which affect the tripping-in and -out speeds including mud properties and drillstring and hole configuration. A comparison between the critical pipe running speed computed using the two methods has been outlined and very good accuracy based on the coefficient of linear correlation (r2) and the standard error of estimate (SEE) (r2 = 0.995 ; SEE = 0.39 for running-out correlation and r2 = 0.875 ; SEE = 0.8] 7 tor running-in correlation) have been obtained. Critical tripping speeds were found to be greatly dependent on mud weight and rheology, hole diameter and drillcollars-to-dri11pipe length ratio.Corresponding Author:
Professor Musaed N. J. Al-Awad, Petroleum and Natural Gas Engineering, Department, College of Engineering, King Saud University, PO Box 800, Riyadh 11421, Saudi Arabia
Government Ownership Effect on Staffing Level and Financial Performance: A Case Study on Kuwaiti Banks
No full textIt has always been believed that government ownership would lead to bad financial performance and overstaffing in any organization. This study aims to examine the effect of government ownership on staffing level and the financial performance of Kuwaiti bank over the period 2010-2018. Using the financial data of ten banks listed at Kuwait stock exchange (KSE), results shows that there was s statistically significant direct relation between government ownership and overstaffing and statistically significant inverse relation between government ownership and the financial performance of banks measured by return on assets (ROA). On the other hand results show that there was no relation between overstaffing and the financial performance of Kuwaiti banks
The Profitability of Using Pegged Currencies in Carry Trade: A Case of Saudi Riyal
No full textThis paper examines the profitability of using pegged currencies in carry trade. Conducting this exercise on Saudi riyal against six floating currencies has proven to be very rewarding especially when enhanced with forecasting methods. Carry trade is a very popular currency speculation strategy among traders, where they borrow low-interest currencies and invest in high-interest currencies. It is a strategy that takes advantage of interest rate differentials between two currencies. Such strategy should not work under uncovered interest parity (UIP), since according to UIP high interest rate currencies should depreciate against low interest rate currencies by the interest rate differential itself. But studies have shown that UIP does not stand and carry traders are profiting from it. As a result of its failure, carry traders are making returns matching the returns of the S&P 500 and outperforming it in terms of the Sharpe ratio
The Role of Money in Saudi Arabia\u27s Economic Expansion: An Empirical Investigation of Monetary Dynamics
No full textThis study investigates the long-term and short-term relationships between different monetary aggregates (M0, M1, M2, and M3) and GDP in Saudi Arabia using the Engle-Granger cointegration test and the Granger causality test. The results reveal that M2 has the most stable long-term relationship with GDP, making it the most reliable aggregate for policy formulation. M1 also shows a strong relationship, while M3’s connection is comparatively weaker. The causality analysis indicates bidirectional relationships between GDP and M1, M2, and M3, suggesting that changes in these aggregates can both influence and be influenced by economic activity. In contrast, M0 shows no significant long-term relationship and only responds to changes in GDP, indicating its limited policy relevance. These findings highlight the importance of using broader aggregates like M2 for effective policy targeting in Saudi Arabia’s evolving economic landscape. The study provides crucial insights for policymakers in selecting appropriate monetary aggregates for long-term planning and short-term economic stabilization
Risk and Financial Performance: A Case Study on Kuwaiti Banks
No full textThe purpose of this study is to examine the effect of risk factors on the financial performance of Kuwaiti banks. The study is based on the financial data of ten banks listed on Kuwait stock exchange (KSE) over the period 2011-2021. Using pool OLS regression method where return on assets (ROA) is used as the proxy of financial performance and operational risk, credit risk and liquidity risk as risk factors, the results of the research show that the financial performance of Kuwaiti banks is mostly affected by operational risk and liquidity risk and that credit risk does not have any statically significant effect of their financial performance
BANKRUPTCY RISK AND SHARE PRICES: A CASE STUDY ON ENERGY COMPANIES IN KUWAIT
No full textThis study aims to investigate how investors' perceptions of risk impact the stock prices of energy companies listed on the Kuwait Stock Exchange (KSE) from 2016 to 2023. Investors' belief in the future financial stability of the companies they invest in influences their risk perception. Therefore, if investors hold pessimistic views, they will decrease their investment in these companies, causing share prices to drop, and vice versa. The Zmijewski x-score model is utilized in this study as a measure of risk to assess the financial stability of Kuwaiti energy companies and its impact on their stock prices. The study employs ordinary least square regression (OLS) to analyze the correlation between the x-score and share prices. Results from this research indicated that there was no statistically significant relation between Zmijewski's x-score and stock price and that investors look at other factors when choosing their investments. This is evident because the company with the greatest bankruptcy risk in the following two years also had the second-highest share price. JEL: G1, G4, M21 Article visualizations
