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Vascular Invasion, Satellite Nodules and Absence of Tumor Capsule Strongly Correlate with Disease-Free Survival and Long-Term Outcome in Patients Resected for Hepatocellular Carcinoma  [PDF]
Benedetta Pesi, Luca Moraldi, Daniela Zambonin, Francesco Giudici, Tiziana Cavalli, Rami Addasi, Francesca Leo, Stefano Scaringi, Giacomo Batignani
Journal of Cancer Therapy (JCT) , 2014, DOI: 10.4236/jct.2014.514134
Abstract: Background: Hepatocellular carcinoma (HCC) is one of the most common cancer in the world. Liver resection (LR) is the most used therapy in well compensated liver cirrhosis and maybe used as a first-line treatment. Aim of the study is to evaluate survival rates in patients who underwent LR for HCC and to identify risk factors able to influence the prognosis. Material/Method: A retrospective study was carried out in 115 patients whounderwent LR for HCC. We evaluated overall and disease-free survival rates at 1, 3 and 5years (y) and a series of variables included: type of resection, clamping, blood loss, transfusions, tumor size, presence of capsule, satellite nodules and vascular invasion. Results: The 1-, 3-, 5-y survival rates were 90.2%, 67% and 52.7%, and disease-free survival rates
Calculations of Short-Length Permanent Magnets
Emad Said Addasi
International Journal of Electrical and Power Engineering , 2012,
Abstract: The current study focuses on the permanent magnet calculations, particularly the cylindrical short-length (small height) permanent magnet. The used model of this permanent magnet takes into account the leakage flux. A procedure for permanent magnet calculations has been developed. Simple equations have been carried out in this study for permanent magnet calculations. These equations show that for short-length permanent magnet, unlike long cylindrical permanent magnet, the value of permeance of the useful (required) magnetic flux path and the permeance of the leakage flux path do not depend on the length of the permanent magnet, but they depend only on the magnet diameter. And for permanent magnet design these equations will be useful.
Tension Force Regulator of Fine-winding Materials
Emad Said Addasi
International Journal of Electrical, Electronics and Computer Systems (IJEECS) , 2012,
Abstract: This paper describes a new method (apparatus) for regulation the tension force of winding thread, which is used in textile industry. The suggested facility is very simple and it does not require a power supply. It consists of metal cylinder, cone, cup filled with liquid, lever, pulley, and other simple components. In this facility the pulley and the lever play the role of the feedback element for the tension force signal. At the same time this lever is used as actuator to improve the tension force of the winding thread. The suggested device is provided by an adjusting element to set the tension force at the required reference value.
Induction Motor with Two Rotors
Emad Said Addasi
Information Technology Journal , 2003,
Abstract: The current paper concentrates on the cooling conditions of high-slip induction motors. So when such motors operate at low speed they have bad cooling. The suggested design may solve this problem. An additional rotor fixed on the motor shaft with special and simple design gives better cooling conditions. An additional rotor (fan-rotor), coaxial located with the main rotor, is packed free to the motor shaft independently on the main rotor. The torque in the additional rotor is produced by both the leakage magnetic flux of the projective part of the stator winding (the end of turns) and by the main rotor flux. Thus the additional rotor gives intensive cooling for the motor either it works with high speed or with low speed.
Analysis of the Classical Equations of Induction Motor by the Program Maple
Emad Said Addasi
Information Technology Journal , 2003,
Abstract: Electric machines theory starts in the nineteenth century. And many of their studies have some approximation and simplification. Therefore, in electrical machines theory there are approximative equations, but they are in use until now. So it is important to be insure that such classical equations are enough accurate. In this paper with use of the program Maple, conclusion of equations of the induction motor torque, the maximum torque, and the critical slip and comparison of obtained outcomes with classical equations are carried out.`
Saturation in Principal Channel for Nonlinear Media with Stokes Shifting Emission Bands
Jihad Said Addasi
Journal of Applied Sciences , 2005,
Abstract: The phase response of nonlinear media is very usefull to study nonlinear processes such as : four-wave mixing, holography and amplification of laser’s irradiations. Using a typical three-level configuration (S0-S1-S2) for nonlinear media, the transitions of molecules in principal channel (S0-S1) can be realized by light fields of intensity I12 at frequency 0. At the same time, light fields with intensity I23 at frequency interact with excited molecules to realize their transitions in excited channel (S1-S2). The cubic nonlinearity of dye solutions is taken into consideration to study the saturation processes of nonlinear media with Stokes emission bands. The saturation of phase response of dye solution in principal channel (S0-S1) is realized at saturation intensity Isat12. The value of saturation intensity Isat12 in principal channel decreases with increasing of radiation intensity in excited channel I23. The saturation intensity Isat12 has its optimum (minimum) values, when the frequency of light fields in principal channel is tuned with Stokes shift from the centre of principal absorption band. In addition, the saturation intensity Isat12 has its optimum, when the radiations in excited channel have enough big intensity I23 and have a frequency tuning with anti-Stokes shift from centre of absorption excited band.
Saturation Intensity in Excited Channel for Nonlinear Medium With Coincident Absorption and Emission Bands-Part I
Jihad S.M. Addasi
Journal of Applied Sciences , 2007,
Abstract: Optical properties of nonlinear medium can be considered by using a typical three-level configuration (S0-S1-S2). In this configuration the transition of molecules in principal channel (S0-S1) are occurred by the light fields of intensity I12 at frequency ω0 and the light fields with intensity I23 at frequency ω transmit the excited molecules to second excited level (S2). The absorption and other properties of dye solutions depend on the intensity of radiations and on saturation processes in excited channel, which occurred at saturation intensity I23sat. The saturation intensity in excited channel decreases with increasing radiation intensity in the principal channel. The saturation intensity I23sat, for materials with coincident absorption and emission bands, has its optimal values when the frequency of light fields in principal channel is tuned into the centre of principal absorption band. The saturation intensity in excited channel, with enough small values, achieved through effective excitation of molecules in principal channel and when the radiations in excited channel tuned into the centre of absorption and emission excited bands. The saturation intensity in excited channel affect strongly the nonlinear processes such as: four-wave mixing, holography and bistability and their control.
Application of the Analytical Hierarchy Process (AHP) to Multi-Criteria Analysis for Contractor Selection  [PDF]
Mohammed Balubaid, Rami Alamoudi
American Journal of Industrial and Business Management (AJIBM) , 2015, DOI: 10.4236/ajibm.2015.59058
Abstract: One of the key activities of any client is contractor selection. Without a suitable and precise method for selecting the best contractor, the completion of a project will likely be affected. In this study, we examine the use of the analytical hierarchy process (AHP) as a decision-support model for contractor selection. This model can assist project management teams in identifying contractors who are most likely to deliver satisfactory outcomes in a selection process that is not based simply on the lowest bid. In this study, an AHP-based model is tested using a hypothetical scenario in which candidate contractors are evaluated. Six criteria for the primary objective are evaluated. The criteria used for contractor selection in the model are identified, and the significance of each criterion is determined using a questionnaire. Comparisons are made by ranking the aggregate score of each candidate based on each criterion, and the candidate with the highest score is deemed the best. This study contributes to the construction sector in two ways: first, it extends the understanding of selection criteria to include degrees of importance, and second, it implements a multi-criteria AHP approach, which is a new method for analyzing and selecting the best contractor.
The Competitiveness of Jordan Phosphate Mines Company (JPMC) Using Porter Five Forces Analysis
Rami Alrawashdeh
International Journal of Economics and Finance , 2012, DOI: 10.5539/ijef.v5n1p191
Abstract: The area of changing international mineral competitiveness has attracted growing attention among mineral economists. The main purpose of this paper is to examine the competitiveness of the Jordan Phosphate Mines Company (JPMC) using porter analysis. A questionnaire survey was undertaken with JPMC experts and findings showed that JPMC has a favorable advantage on the bargaining power of suppliers, threat of substitutes and threat of local entry. However, it doesn’t have a favorable advantage on the bargaining power of buyers, rivalry among competitors and threat of global entry. Depending on the literature and the questionnaire findings, a number of strategies were recommended to JPMC, which can also be adopted by the companies in other developing countries.
Inspection of Large Droplets in Fuel Sprays Using a Gaussian Laser-Sheet: An Experimental Approach
Rami Zakaria
ISRN Optics , 2012, DOI: 10.5402/2012/691637
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