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Position paper on the decree law amending the law establishing the Supreme Constitutional
No full textورقة موقف صادرة عن وحدة القانون الدستوري، وتبحث في التعديلات التي أدخلها القرار بقانون رقم (9) لسنة 2017 المعدل لقانون المحكمة الدستورية رقم (3) لسنة 2006. وإذ تنظر ورقة الموقف هذه بإيجابية إلى بعض التعديلات التي يمكن البناء عليها من قبل المجلس التشريعي عند مراجعته، إلا أن هناك بعض التعديلات التي جاءت إشكالية
Use of electrospun fiber mats for the remediation of hypersaline geothermal brine
No full textGeothermal brines display high contents of various metal ions that can adversely affect surface and groundwater resources. Nevertheless, it is possible to sequestrate these metals and use some of them in certain engineering applications. The aim of this study was to fabricate electrospun chitosan fiber mats and remove heavy metal cations from geothermal brine of the Tuzla geothermal field (TGF) by employing these mats. TGF is located on the Biga Peninsula in the northwestern part of Turkey. The brine of TGF has high salinity (EC > 91 mS/cm) and high temperature (reservoir temperature is 173°C).
The brine is rich in terms of metal cations. For instance, the concentration of lithium ion in geothermal fluid ranges from 17 to 35 mg/L, with little seasonal variations. A horizontal electrospinning setup was employed to obtain a non-woven mat comprising submicron diameter chitosan fibers at 2.0 kV∙cm−1.
This material was then utilized as a stable membrane for the removal of metal ions present in the brine through sorption at 25°C overnight. The results showed that the chitosan fiber mats sequestrate various ions in the brine. Under the studied conditions, the material was capable of removing 46%,44%, 50%, 44%, 40%, 67% and 48% of Li+ , Mg2+, Ba2+, Sr2+, Mn2+, Ca2+ and K+ from the geothermal brine, respectively
Amalgamation performances of gold-coated quartz wool, alumina, silica, sand and carbon fiber for the determination of inorganic mercury in waters by cold vapor atomic absorption spectrometry
No full texthttp://link.springer.com/article/10.1134/S1061934817050033Different gold-coated sorbents for amalgamation were applied for the determination of inorganic mercury in waters using a home-made cold vapor generation unit coupled to atomic absorption spectrometry. Among the gold-coated materials investigated (quartz wool, alumina, silica, sand and carbon fiber) quartz wool was found to give the most efficient results in terms of sorption and release. Analytical performance of the system without and with amalgamation was investigated and it was found that when amalgamation was applied, the linearity and slope of the calibration plots were independent on the sample volume for 1.0, 5.0 and 10.0 mL. Method validation was realized through the analysis of a sample of spring water spiked with 1.0 μg/L inorganic mercury and the spike recoveries were found to be 95 ± 1, 91 ± 3, and 99 ± 5% for 1.0, 5.0, and 10.0 mL, respectively. The results demonstrated that the methodology can be applied to these types of samples directly or after amalgamation, depending on the mercury concentration
On the dynamics of a rational difference equation xn+1=α+βxn+γxn−kBxn+Cxn−k
No full textIn this paper, we will investigate the dynamics of a nonlinear rational difference equation of a higher order. Our concentration is on invariant intervals, periodic character, the character of semi-cycles and global asymptotic stability of all positive solutions of x n +1 = α+ βx n + γx n −k Bx n + Cx n −k , n = 0 , 1 , . . . It is worth to mention that our results solve partially some of the open problems proposed by Kulenvic and Ladas in their monographs [17], [18]
Palestinian public diplomacy : sport as soft power
No full textبحثت هذه الرسالة موضوع الدبلوماسية العامة الفلسطينية عبر بحث الرياضية الفلسطينية باعتبارها نموذجا للقوة الناعمة الفلسطينية، تم اتباع المنهج الاستنباطي
(Deductive)
بإسقاط واختبار منظورات الدبلوماسية العامة التي تطورت عالميا على الواقع الفلسطيني، و بحث الرياضة باعتبارها إحدى وسائل تلك الدبلوماسية، و وثقت هذه الدراسة محطات رياضية فلسطينية كانت السياسة و الدبلوماسية حاضرة فيها، سواء من حيث المعنى السياسي لهذه الأحداث، أو من حيث الأثر السياسي في الحياة الرياضية. تتكون الد ارسة من اربعة فصول. يتضمن الأول، تأصيلا نظريا لمفهوم الدبلوماسية العامة والقوة الناعمة وتوسيم األمة في العالقات الدولية. و يستعرض الفصل الثاني تجارب عالمية شكلت بها الرياضي ة نوعا من أنواع السياسة و الدبلوماسية العامة. أما الفصل الثالث فتحدث عن تاريخ الرياضة الفلسطينية الذي يعد جزءا لا يتجزأ من القضية الفلسطينية، حيث تأثرت الرياضة الفلسطينية مدا و جزرا بالأحداث السياسية على مر التاريخ، و برز دور الحركة الصهيونية باحتلال فلسطين رياضيا .و تناول الفصل الرابع دراسة الحالة قبل تأسيس دولة إسرائيل عام 1948
الرياضية الفلسطينية و الأحداث التي شكلت دبلوماسية عامة و قوة ناعمة و توسيم الأمة، منذ تبني السلطة الفلسطينية برنامج بناء الدولة و مؤسساتها وسيلة لوصول الاستقلال، و ذلك نحو العام 2007 و حتى العام 2016. و خلصت الدراسة إلى ان النشاط الرياضي الفلسطيني، أخذ منحى دبلوماسي يتميز بتطبيق أدوات الدبلوماسية العامة و يستخدم القوة الناعمة لتحقيق الأهداف السياسية الفلسطينية ثبات هويته في المجتمع الدولي و تأكيد وجود الشعب الفلسطيني و إثبات هويته، سواء على مستوى الحكومات أو الشعوب، كما أخذت الأحداث الرياضية طابع توسيم الأمة و تبيان الكينونة الفلسطينية للعالم، لكن دون إمكانية الجزم بوجود استراتيجية فلسطينية مخططة متكاملة لهذا الغرض، و دون تجاهل وجود حالات تعثر و نتائج سياسية عكسية لبعض المحطات الرياضي
أثر التحيزات السلوكية على قرارات المحافظ الإستثمارية و ظهور الشواذ المالية في سوق فلسطين المالي
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Potential application of renewable energy sources at urban wastewater treatment facilities in Palestine - three case studies
No full textR & DThis paper aimed to assess the energy consumption and the removal efficiency of three wastewater treatment plants (WWTPs) in Palestine and explores the potential application of renewable energy with associated impacts on unit operations. National rules and regional guidelines for treated water are regulatory instruments for the construction approval of WWTPs in Palestine. Three urban WWTPs of various technologies were selected as case studies for the assessment. The technologies applied were conventional activated sludge with anaerobic sludge digestion, extended aeration and membrane bioreactor (MBR) serving Nablus, Al-Bireh and Altira cities, respectively. Analysis of collected data on the BOD5 removal were 96%, 98% and 99%. The removal efficiency of nitrogen reached 85% and 95% for Al-Bireh and Altira and not accounted for in Nablus WWTP. The energy required for both liquid and sludge lines was calculated based on the available data and correlated with the treatment efficacy. Results analysis revealed wide variations in the energy consumption among the three WWTPs. Altira MBR showed normal trends compared to published literature with 2.88 kWh/
m3, of which 40% was consumed by the biological treatment stage. Al-Bireh WWTP consumed 1.86 kWh/m3 with 35% of the electrical consumption for biological stage, and 24% for the sludge line. Nablus-WWTP consumed 2.25 kWh/m3 with 62% of the energy consumed by the biological stage and 34% for sludge line. Under load operation below the design capacities, the specific energy consumption for Al-Bireh and Nablus WWTPs are contradicting common published data for activated sludge treatment systems. Use of renewable energy could assist in the reduction of the annual energy operational costs. Assessment of solar photovoltaic (PV) application could yield electricity sufficient for Altira and Al-Bireh pump station facilities covering 9%, 15%, and 1% of their energy demand. PV installation at Nablus WWTP showed marginal impacts if connected off-grid or if combined heat and power are not operational until 2020, payback periods were estimated at 7.5 and 18.7 years, respectively.European Desalination Society Secretariat, Italy and the Higher Council for Innovation and Excellence, Palestin
Silver tetradrachms from Kherbit Beit Nasib west of Hebron
No full textA chapter in Book titled : Wiener Zeitschrift für die Kunde des Morgenlandes, 2017, pp.19-26This study deals with six silver coins of the tetradrachm denomination that were found in Kherbit Beit Nasib west of Hebron. The coins are large, undated and struck over Roman coins during the third and last year of the Bar Kokhba’s rebellion (134-135 A.D.) against Roman rule. They are relatively well preserved. The motifs and the texts that appear on obverses and reverses of these coins are repeated and homogenous in form and content