ISSN: 1817-2695

Volume 34, Issue 3

Volume 34, Issue 3, Summer 2008, Page 1-43


Proposed algorithm to decrease the intersection points in Cohen algorithm for clipping

Bushra M. Hassan; Yusra M.Dhamed; and

Journal of Basrah Researches (Sciences), Volume 34, Issue 3, Pages 1-13

There isn't any drawing software without line clipping routines, it is very important processing because it can use to clip part or parts from the displayed image in order to maximize or minimize it or to do any processing with it.

There are many algorithms which process clipping problem like Cohen algorithm which suffer from many intersection problem which make drag in finding the part which we want to clip right way. Another algorithms appeared to improve its work like Liang-Barsky and NLN algorithms but they all need the approximation solution in decreasing the intersection points.

The proposed algorithm solved the problem in easy and quick way, it can decrease the intersection points calculating by separating the lines according to their properties and divide the region to critical and not critical parts in order to know the real or virtual intersection points(active and inactive)and find the real parts within the clipping window boundaries. This processing cooperate in decreasing the repetitive intersection points which the previous algorithm lay in it.The forgoing have been formulated in C++ language.

In Vitro Influence of pH and Temperature on Extracellular Enzymic Activity of Protease in Nematode-Trapping Fungi

K. J. Hammadi; Dr. Ali A. Kasim; and; H.G.Al-Nasrawi

Journal of Basrah Researches (Sciences), Volume 34, Issue 3, Pages 14-22

In the present study influence of pH and temperature on extracellular enzymic activity of protease on solid media were tested of six species of nematode -trapping fungi (Arthrobotrus anchonia , A.dactyloides , A.oligospora , Dactylella brochopaga , Dactyleria pyriformic , Monacrosporium eudermatum) . The extracellular enzymic activity of protease were varied according to fungal species and the value of pH and temperature . A.oligospora produced high vegetative growth in all pH values , followed by M.eudermatum , whereas D.pyriformic showed a low vegetative growth followed by A.anchonia . Nevertheless, all tested fungi showed a high vegetative growth at pH = 7.5 , followed by value 7 , whereas it's growth was weak at pH = 8.5 , no vegetative growth showed at pH = 6 .
A.oligospora showed a high enzymic activity followed by M.eudermatum , a low enzymic activity was appeared in D.pyriformic . A best enzymic activity in the tested fungi produced at pH = 7.5 , followed by pH = 7 , while all tested fungi were never showed enzymic activity in pH = 6 and 8.5 .
This Study showed that the M.eudermatum produced a highest growth rate in all tested temperature degrees , followed by A.oligospora , whereas D.pyriformic showed lowest growth rate , the vegetative growth in other tested fungi were varied
However, the optimum temperature for vegetative growth of all tested fungi was 25 C° , followed by 30 C° , while the lowest vegetative growth was appeared at 40C° followed by 15C° . The high activity of protease showed in A.oligospora , followed by M.eudermatum , the low activity revealed in D.brochopaga, in tested temperature degrees . the 30C° showed a high enzymic activity . followed by 25C° , on the contrary , no enzymic activity appeared in all tested fungi in both 15C° and 40C°

Isolation and identification of Brucella melitensis from the local soft chees in Basrh city

Saad Shaker Mahdi

Journal of Basrah Researches (Sciences), Volume 34, Issue 3, Pages 23-27

This study to cussed on the isolation of bacteria Brucella from the local chees in Basrh city . Atotal of (168) samples of cheese from different place in Basrh were collected .Results show that four isolates represents in ratio (2.4%) of Brucella melitensis .Anti-bacterial activity of ten antibiotics was tested against the selected bacterial isolates .The results revealed that all bacterial isolates were absolutely sensitivity to words the Gentamycin , Tetracycline , Streptomycin , Tobramycin and Erthromycin .while the isolates (1,4) exhibited multiple resistance to words Ampicillin , Lincomycin , Chloramphenicol , Cephalexin and Nalidix Acid , nevertheres the isolates (2,3) showed a multiple resistance to words Ampicillin , Lincomycin, Chloramphenicol , Cephalexin and Nalidix Acid

Bio-Diversity of Mollusca in Four follow ecosystem southern of Iraq

Raid Sami Atte

Journal of Basrah Researches (Sciences), Volume 34, Issue 3, Pages 28-34

A comparative study of mollusca bio – diversity were atended in four follow ecosystem southern of Iraq Namely at AL – Hartha power stati AL – Ashar and main drainage / AL - Nathen and AL - Matar rivers . Sampling have been done monthly for one year starting in October 2005 to Septembere 2006. Ten species from Gastropoda and pelecypoda respectively as well as 3species of mollusca were dominated most of year which are : Lymenaea megasom and Melanopsis nodosa from Gastropoda and species of Corbicula fluminea From Atotal bio - diversity values were 2.3. 1.6 and 1.9 at present study sites respectively .Yearly density of mollusca Shown gradiant in values which were 415.1-42.8-276.6 and 194.9ind/m2 at the same sites respectively.

Effect of planter forward speed and the size and the shape of seeds and the interaction between them on safety droped seeds

Majid H. Al- Heidary

Journal of Basrah Researches (Sciences), Volume 34, Issue 3, Pages 35-43

The aim of this work is study the effect of planter forward speed and the size and the shape of seeds and the interaction between them on safety droped seeds using edge – drop plate .
The experiments were carried out using four forward speeds 0.48 , 0.66 , 1.22 and 1.76 m / sec , four seeds sizes for sorghum crop (circular shape seeds) 0.01 , 0.02 , 0.03 and 0.29 cm3 , and four seeds sizes for corn crop (semi- spherical shape seeds ) 0.20 , 0.23 , 0.27 and 0.44 cm3 and two feeding cell sizes 3.87 and 1.41 cm3 .
The results showed that increasing the planter forward speed reduced the number of seeds in the hill and increased the number of the damaged seeds for all the seeds sizes and for both crop types . Increasing the seeds sizes lead to reduction in the number of the seeds plant in the hills and increased the number of damaged seed .