Volume 17 Issue 5
Published: 2009-10-01
Contents
Article
Active Control Of Vibration For Aflixibly Supported Rigid Rotor On Oil Film Bearings
Ikhlas A. Basheer, Zakariya Y. Mohammad
Vibrations in rotating system are considered as one of the major operating problems since they have adverse effects on the performance of rotating system, which result in operating life...
DOI: 10.33899/rengj.2009.43384
A Study on the Effects of Servovalve Lap on the Performance of a Closed - Loop Electrohydraulic Position Control System
Rawand E. J. Talabani, Yahya A. Faraj, Rafa A. H. AL-Baldawi
AbstractThis paper deals with a closedloop position control of a double acting and doublerod actuator using an electrohydraulic servovalve (EHSV). This system is studied by using symmetric critical...
DOI: 10.33899/rengj.2009.43375
THD Reduction Using Series Transformer Connection In A STATCOM Within Mosul Ring System
Yasser A. Mahmood, Majed S. Al-Hafid, Dhaiya A. Al-Nimma
AbstractThe static synchronous compensator (STATCOM) is one of the components of Flexible AC Transmission System (FACT). STATCOM is used to compensate the reactive power with fast response. It...
DOI: 10.33899/rengj.2009.43378
Numerical Study of Natural Convection Heat Transfer of Porous Cavity contains Partitions and Square body by Using Thermal Non-Equilibrium Model
Ramiz Ibraheem Saeed Al-Abushi
AbstractIn this research, natural cnvective heat transfer between hot walls of cavity and a cold body with square section concentric in cavity is studied numerically. The cavity is filled with a...
DOI: 10.33899/rengj.2009.43385
Applying Direct Sequence Spread Spectrum to Improve the Throughput of Aloha Protocols
A. I. A. Jabbar
AbstractAloha protocols are characterized by their easy performance and relatively simple hardware requirement as compared with other protocols like CSMA/CA.The main disadvantages of Aloha...
DOI: 10.33899/rengj.2009.43379
Wavelet-Based Homomorphic De-Speckling Technique With Directional Weighted-Averaging Stage
Jassim M. Abdul-Jabbar
AbstractIn this paper, a new homomorphic wavelet-based de-speckling technique is proposed. The technique combines a spatial domain processing with another transform domain processing in a...
DOI: 10.33899/rengj.2009.43380
The Effect of Power Swing on Distance Relays Performance
Atheer Habash Abosh, Abdul Ghani A. Abdul Ghafoor
AbstractThe distance relay is suffering from under-reach in its performance. This is because of some transient disturbance, which may happen when the power flows and swings. Besides that the power...
DOI: 10.33899/rengj.2009.43386
The Effect Of A Variable Percentage Of Limestone Filler On Some Mechanical Properties Of Self-Compacting Concrete
Ashtar S. Al-Luhybi
AbstractThe first aim of this experimental program is to produce and evaluate Self-Consolidating Concrete (SCC); the second aim is to replace part of cement by predetermined percentages of...
DOI: 10.33899/rengj.2009.43381
Wastewater Treatment of Khanssa Hospital by Using Some Types of Muds
Halla Nabeel Elea, Soad Abid Abawee
AbstractThis study aimed to treat the wastewater of Khansaa Hospital in Mosul city by using mud of ( Bentonite , Ninavite & Kaoline ) the experiments were conducted by using the Jar-Test as...
DOI: 10.33899/rengj.2009.43388
Predicting The Relationship Between The Modulus Of Rupture And Compressive Strength Of Cement Mortar
Sura A. Majeed
The present paper deals with studying the effect of sand/cement (s/c) ratio and water/cement (w/c) ratio on the mechanical properties of cement mortar and to predict a relationship between modulus...
DOI: 10.33899/rengj.2009.43383
Laboratory Comparison Study of Scour Downstream Weirs and Communed Gates
Ahmad A. A. Alkatan, Mwafaq Y. M. Aljubori, Bahzad M. A. Noori
In the present investigation , a laboratory study of scour characteristics downstream weirs , compound gates has been conducted . The study included the measurement of maximum scour depth and the...
DOI: 10.33899/rengj.2009.43392
Statistical Study for Free Evaporation at Mosul Area by Kernel Estimation Method
Alaa Emad Hameed, Basil Khether Dawood, Basil Younis Thanoon
AbstractMeteorological phenomena like temperature, humidity, radiation, wind speed play an important role in the determining the quantity of evaporation. In this study one of the advanced methods...
DOI: 10.33899/rengj.2009.43396
Spatial Configuration properties of Islamic Palaces
Raeed S. A. Al-numman
In recent years, trends focusing on exploration the architectural identity through the study of the domestic architecture properties, have emerged in order to find an appropriate architecture...
DOI: 10.33899/rengj.2009.43401
Visual Sequences in Mosul City Paths A comparative Study for formal characteristics
Niam .Behnam Manona
AbstractThe urban environment is a spatial organization synthesized from different types of spaces, its characteristics are the key factor of its use because spatial relationship usually affect...
DOI: 10.33899/rengj.2009.43404
The Rhythm and Heritage Continuity in Contemporary Mosul Architectural Product
Nasma M. Thabit
AbstractThe present study defines the research problem as a reformulation of a scientific aspect to study of the relations between heritage and rhythm under influence of continuity, and discusses...
DOI: 10.33899/rengj.2009.43409
