http://dspace.zu.edu.ly/xmlui/handle/1/1684 2026-04-14T06:45:43Z http://dspace.zu.edu.ly/xmlui/handle/1/2080 EFFECT OF REPLACEMENT OF THE Cu VITAL ENVIRONMANT FOR La ON THE TRANSPORT PROPERTIES OF YBa2(Cu x-1 Lax)3O -7 Abdulqader, Sanaa Masod; Elharari, Najah Ibrahem; Ali, Saad Salem Saad To be able to produce high quality superconducting material, the effect of substitution of copper in YBa2(Cu x-1 Lax)3O -7 δ superconductor by La content ( x=0 – 0.06 ) have to be understood . The study of transport properties of YBa2(Cu x-1 Lax)3 O -7 δ in this work using temperature measurements indicated that the best superconducting properties can be obtained for substitution of Cu by La concentration within the range (x=0.02- 0.04). The highest Tc (≈90K), sharpest transition to superconductivity (Δ=5 K) and lowest electrical resistivity (𝜌= 9.2𝜇Ω.cm) are corresponding to the substitution samples of x=0.02 and 0.04. Depression and degradation of the superconducting state as (x) increases above this rang is observed. Excess dopant of La (x ≤ 0.06) results in a strong decoupling of chains and planes whereas optimal La doping (0.02 ≤ x ≤ 0.04) can be adopted an alternate route to extensive oxygen anneal. 2021-11-01T00:00:00Z http://dspace.zu.edu.ly/xmlui/handle/1/2079 𝜷 boundary in Intuitionistic fuzzy topological spaces Abu Surrah, Ameerah; Bashir, Maruah In this paper the concept of Intuitionistic fuzzy 𝛽 boundary is introduced and several of its properties are investigated. Intuitionistic fuzzy set is very useful in providing sufficient material for researchers to utilize these concepts fruitfully 2021-11-01T00:00:00Z http://dspace.zu.edu.ly/xmlui/handle/1/2078 The Technique of Radio-Chemical Separation of Materials Using Ion Exchange Resin Omer, Manal; Said, Assma Musbah This experiment is designed to demonstrate the technique of radiochemical separation of materials. The single-stage separation factors for boron isotopes between an ion- exchange resin and external solution were determined, using an ion- exchange breakthrough process. A mixture of uranium and copper sulphate solutions are passed through an ion exchange column. 10 % w/v of uranyl sulphate solution, 10 % w/v of ammonium hydroxide, in addition to 10 % v/v of hydrochloric acid and 1% w/v of silver nitrate solution were used as an elutes. The separation of these elements from a large number of diverse elements was effected either by selective sorption or selective elution with water or specific elutes. The samples were measured using gamma-ray spectroscopy. The results indicate that 16.1% of uranium complex anion was stayed in the resin. 2021-11-01T00:00:00Z http://dspace.zu.edu.ly/xmlui/handle/1/2077 الرسوم البيانية المرتبطة بالزمر التبديلية المنتهية داعوب, حمزة الهادي; Daoub, Hamza; Shafah, Osama Let 𝐴 be a finite abelian group, An undirected graph 𝐺(𝐴) of a finite group 𝐴 is introduced and defined as an undirected simple graph whose vertex set is 𝑉(G) and two distinct vertices 𝑢 and 𝑣 are adjacent if and only if 𝑢2 ≠ 𝑣2. In this paper, for a finite group 𝐴 = (ℤ𝑛, . ), the degrees of vertices, the number of edges of 𝐺(𝐴), the eccentricity, diameter, girth, chromatic number are computed. Furthermore, Hamiltonian and Eulerian cycles of 𝐺 are proposed. 2021-11-01T00:00:00Z