background & aims of the study: corrosion and scaling play undesirable effects on transmission and distribution system of drinking water. the aim of this study was to assess the corrosion and scaling potential of drinking water resources in babol city. materials and methods: totally, 54 water samples were collected from 27 wells in spring and autumn. calciu m hardness, ph, total alkalinity, tot...

oriental hybrid lily “arabian red” mother scales were stored in moist cocopeat and perlite (1:1) for 3 or 5 months at 25 ̊c. the numbers of scale bulblets per mother scale were nearly identical in two durations. increasing storage duration promoted the growth of roots (number and length) and no. scales per scale bulblets. and, diameters of scale bulblets were more in longer storage duration (5 m...

background: in helical tomotherapy (ht), the scaling factor (sf) is the time in seconds that each leaf viewing a target would need to be open to deliver the prescribed dose. the sf is patient-specific and is used to calculate the rotational period of the gantry, and the total treatment time (ttt) of the ht. the sf is generally difficult to estimate. currently, it takes about one hour to fully o...

The Scaling Law for the Discrete Kinetic Growth Percolation Model The critical exponent of the total number of finite clusters α is calculated directly without using scaling hypothesis both below and above the percolation threshold pc based on a kinetic growth percolation model in two and three dimensions. Simultaneously, we can calculate other critical exponents β and γ, and show that the scal...

in this work, we proposed an efective method based on cubic and pantic b-spline scaling functions to solve partial differential equations of frac- tional order. our method is based on dual functions of b-spline scaling func- tions. we derived the operational matrix of fractional integration of cubic and pantic b-spline scaling functions and used them to transform the mentioned equations to a ...

in this work we deal with the question: how can one improve the approximation level for some nonlinear integral equations? good candidates for this aim are semi orthogonal b-spline scaling functions and their duals. although there are different works in this area, only b-spline of degree at most 2 are used for this approximation. here we compute b-spline scaling functions of degree 4 and their ...

Measurement of soil saturated hydraulic conductivity, Ks, is normally affected by flow patterns such as macro pore; however, most current techniques do  not differentiate flow types, causing major problems in describing water and chemical flows within the soil matrix. This study compares eight models for scaling Ks and predicted matrix and macro pore Ks, using a database composed of 50 datasets...

خلصت هذه الدراسة إلى دحض الادعاء بوجود فجوة تاريخية في تطور علم الاقتصاد، حيث تمكن الرواد الأوائل من الاقتصاديين المسلمين وضع العديد الأسس الفكرية لعلم الاقتصاد. تسلط الضوء على الفترة الزمنية التي تم تجاهلها قصداً أو جهلا لتكشف عن الجذور التاريخية الاقتصاد الإسلامي وتكشف الحلقة المفقودة منذ القرن الهجري الأول الخامس، سعت نقض ادعاء الريادة الغربية خلال ما عرضته إسهامات للمفكرين الذين سبقوا الغربي...