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jeasiq-1222
Analysis of relations and forces of production in extraction And pearl industry in the Arabian Gulf 1900-1950 *
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بسبب محدودية الموارد الطبيعية، فأن سكان الخليج ومنذ القدم وجهوا جلّ نشاطاتهم توجهاً بحرياً: صيد الاسماك وصناعة اللؤلؤ العنصر الرئيس في حجم التشغيل، وتكوين الفائض الاقتصادي في المنطقة آنذاك.

لقد تزايدت أهمية هذا النشاط بخاصة بعد النصف الثاني من القرن التاسع عشر، لرواج تجارة اللؤلؤ عالمياً، وأنفتاح الخليج على الدول الاوروبية التي شهدت نهضة صناعية متسارعة، وحيث وصلت الخليج العديد من بضائعها ذات الاسعار المناسبة والنوعية الافضل.

إن عدد العاملين في صناعتهِ لم يقل عن 20-25% من مجموع العاملين في المنطقة خلال الربع الاول من القرن العشرين ويبين لنا المؤرخ J.G.Lorimer إن عدد العاملين وصل الى حوالي 90 ألف شخص من سكان قدر مجموعه بـ 300 ألف نسمة وذلك في أواسط العقد الأول من القرن العشرين. وبالأضافة الى العمل المحلي هناك وافدون من أيران والهند وباكستان مع وافدين من شرق أفريقيا، أستُقدم العديد منهم كعبيد سخرهم مالكوهم للعمل في صناعة اللؤلؤ وذلك بالرغم من محاربة السلطات البريطانية آنذاك لأعمال القرصنة وتجارة العبيد في منطقة الخليج والمحيط الهندي.

تفصح التراتيب الوظيفية في صناعة اللؤلؤ عن وجود تسع فئات مُقسمة بدقة حسب نوع العمل الذي تقوم به كل فئة. والعنصران الفاعلان في العملية الانتاجية هما:-

التاجر "الممول": يُمول العاملين بسلف تصل فائدتها الى حوالي 25% على أساس الموسم الذي يستمر بين 4-5 أشهر. وغالباً ما يستحوذ على الجزء الاعظم من الارباح بطريقة أو بأخرى..

الغواص ومساعده: يُلاحظ هنا تناقضٌ واضح، فمن ناحية هما الحلقة الاهم والاخطر في العملية الانتاجية وحيث لا يملك الغواص الا قابلياته البدنية أثناء عملية الغوص؛ ومن ناحية أخرى هما من أكثر المتضررين مادياً وأجتماعياً وصحياً بين الاطراف الاجتماعية المشاركة في هذه الصناعة.

لم تعرف هذه المهنة نظاماً للأجور، بل كانت تعمل وفق طريقة "المحاصصة" ونادراً ما كان يحصل الغواصون ومساعدوهم على ما يسدون به سلفهم وديونهم السابقة مع فوائدها المتزايدة.

    النقطة المركزية: ان العاملين عادةً ما يبقون في دين مستديم، وهذا ما يخوّل الممول حسب العرف السائد آنذاك والذي هو بمثابة قانون مُلزم من الابقاء عليهم للعمل في المواسم اللاحقة.

    لقد تراجعت صناعة اللؤلؤ منذ أوائل ثلاثينيات القرن الماضي، أثر اجتياح اللؤلؤ" الرخيص" المستزرع في اليابان ومناطق أخرى من العالم. ومن حسن حظ المنطقة ان صادف ذلك البدايات الاولى للأكتشافات النفطية حيث انتقل العديد من العاملين فيها الى الصناعة النفطية الحديثة.

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Publication Date
Mon Jul 10 2023
Journal Name
Journal Of Engineering
Bearing Capacity of a Strip Model Footing on Loose Sand Reinforced With Pomegranate Sticks Mat
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A series of laboratory model tests has been carried out to investigate the using of pomegranate sticks mat as reinforcement to increase the bearing capacity of footing on loose sand. The influence of depth and length of pomegranate sticks layer was examined. In the present research single layer of pomegranate sticks reinforcement was used to strengthen the loose sand stratum beneath the strip footing. The dimensions of the used foundation were 4*20 cm. The reinforcement layer has been embedded at depth 2, 4 and 8 cm under surcharge stresses . Reinforcing layer with length of 8 and 16 cm were used. The final model test results indicated that the inclusion of pomegranate sticks reinforcement is very effective in improvement the loading cap

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Publication Date
Sun Mar 01 2009
Journal Name
Laser And Particle Beams
Surface morphology modifications of human teeth induced by a picosecond Nd:YAG laser operating at 532nm
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Scopus
Publication Date
Sat Jan 30 2021
Journal Name
Iraqi Journal Of Science
Solving Systems of Non-Linear Volterra Integral Equations by Combined Sumudu Transform-Adomian Decomposition Method
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     This paper is used for solving component Volterra nonlinear systems by means of the combined Sumudu transform with Adomian decomposition process. We equate the numerical results with the exact solutions to demonstrate the high accuracy of the solution results. The results show that the approach is very straightforward and effective.

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Publication Date
Mon Jun 19 2023
Journal Name
Journal Of Engineering
Study of Some Mechanical Properties for a Polymer Material Reinforcement with Chip or Powder Copper
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In this paper, chip and powder copper are used as reinforcing phase in polyester matrix to form composites. Mechanical properties such as flexural strength and impact test of polymer reinforcement copper (powder and chip) were done, the maximum flexural strength for the polymer reinforcement with copper (powder and chip) are (85.13 Mpa) and (50.08 Mpa) respectively was obtained, while the maximum observation energy of the impact test for the polymer reinforcement with copper (powder and chip) are (0.85 J) and (0.4 J) respectively  

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Publication Date
Sat Feb 09 2019
Journal Name
Journal Of The College Of Education For Women
Optical Design of Laser Zoom Beam Expander at near & far Ranges for Tracked Atmospheric Target
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In this research, beam expander, BEX, is explained and designed for illuminating the
remote flying target. The BEX is optically designed to be suited for Nd:YAG laser of given
specifications. The BEX is modified to be zoom one to meet the conditions of preventing the
receiving unit; i.e the photodetector, from getting saturated at near and far laser tracking.
Decollimation could be achieved by automatic motor, which controls zoom lens of the BEX
according to the required expansion ratio of beam expander

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Publication Date
Fri Nov 24 2023
Journal Name
Iraqi Journal Of Science
Detection of Subsurface Cavities by Using Pole- Dipole Array (Bristow's Method)/Hit Area-Western Iraq
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The study area is located within the Hit area, western Iraq. The measurements of Graphical Bristow’s method were carried out by using Pole-dipole array, to delineate the anomaly of apparent resistivity caused by a known cavity target. The survey was applied along two traverses: traverse in W-E direction and traverse in S-N direction above Um El-Githoaa cavity. Data interpretation of the traverse trending W-E, with a-spacing equal to(2m)identified the anomaly of the cavity at a depth of (2.6m), (1.6m) height, and( 9.5m) width, while the actual dimensions of depth, height, and width were (3.80m),( 2.2m), and (12.30m) respectively, with variations of depth equal to (1.2m), high (0.8m), and width( 2.8m). The data interpretation with a-spac

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Publication Date
Wed Jul 01 2020
Journal Name
Journal Of Engineering
Using Adaptive Neuro Fuzzy Inference System to Predict Rate of Penetration from Dynamic Elastic Properties
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Rate of penetration plays a vital role in field development process because the drilling operation is expensive and include the cost of equipment and materials used during the penetration of rock and efforts of the crew in order to complete the well without major problems. It’s important to finish the well as soon as possible to reduce the expenditures. So, knowing the rate of penetration in the area that is going to be drilled will help in speculation of the cost and that will lead to optimize drilling outgoings. In this research, an intelligent model was built using artificial intelligence to achieve this goal.  The model was built using adaptive neuro fuzzy inference system to predict the rate of penetration in

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Publication Date
Sun Sep 01 2013
Journal Name
Baghdad Science Journal
Some new transition metal complexes of bis (2-methyl furfuraldene)-4,4`-methylene bis (cyclohexylamine) ligand
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New Fe(II),Co(II),Ni(II),Cu(II) and Zn(II) Schiff base complexes which have the molar ratio 2:1 metal to ligand of the general formula [M2( L) X4] (where L=bis(2-methyl furfuraldene)-4-4`-methylene bis(cyclo-hexylamine) ) were prepared by the reaction of the metal salts with the ligand of Schiff base derived from the condensation of 2:1 molar ratio of 2-acetyl furan and 4-4`-methylene bis (cyclohexylamine). The complexes were characterized by elemental analysis using atomic absorption spectrophotometer ,molar conductance measurements, infrared, electronic spectra,and magnetic susceptibility measurement. These studies revealed binuclear omplexes. The metal(II) ion in these complexes have four coordination sites giving the most ex

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Publication Date
Thu Feb 28 2019
Journal Name
Journal Of Engineering
Numerical Simulation of Unsaturated Soil Water from a Trickle Irrigation System for Sandy Loam Soils
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Trickle irrigation is a system for supplying filtered water and fertilizer directly into the soil and water and it is allowed to dissipate under low pressure in an exact predetermined pattern. An equation to estimate the wetted area of unsaturated soil with water uptake by roots is simulated numerically using the HYDRUS-2D/3D software. In this paper, two soil types, which were different in saturated hydraulic conductivity were used with two types of crops tomato and corn, different values of emitter discharge and initial volumetric soil moisture content were assumed. It was assumed that the water uptake by roots was presented as a continuous sink function and it was introduced into Richard's equation in the unsaturated z

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Publication Date
Sun Jan 01 2023
Journal Name
Alexandria Engineering Journal
Calcium/iron-layered double hydroxides-sodium alginate for removal of tetracycline antibiotic from aqueous solution
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