Abstract The big construction projects suffer from problems of delay and increasing in cost compare cost of the estimated. This is due to the nature of construction industry risky. Most of the projects occur once and a unique does not repeats. Each project differs from the other and there is no two projects agree in all characteristics and conditions, which makes each project has a particular circumstances and challenges and related has been exposed to a lot of projects to a number of the ri...
Abstract In this research laser used to irradiant milk and its effect on the pH and absorbance has been studied in this research. Six samples of cow's milk were taken from the farm directly, without any additions of preservatives. five samples from six samples were irradiated by Nd:YAG laser 1064 nm wavelength using different output powers (10, 20, 30, 40 and 50) mW and the sixth sample was left without irradiation as a control, the result shows that by increasing laser dose the absorbance b...
Abstract The study generally presents the mechanism of ablation of metals by ultrafast laser pulses; the main part was devoted to understanding a particularly interesting case: femtosecond pulse laser irradiation. Femtosecond ablation heating is described by a two-temperature model based on the Fourier heat transfer equation. This model consists of two parabolic differential equations coupled by the exchange term between the two subsystems, namely the electron gas and the ion network. The ul...
ABSTRACT This dissertation examines the impact of risks to customers’ trust on using mobile money transfer services in Tanzania, with a special focus on risk including the facets of perceived risks which are performance risk, security/privacy risk, time risk, social risk and financial risk. These aspects are covered through a critical review of existing literature, secondary data and a survey targeting mobile phone users with M-Pesa accounts and M-Pesa agents living in Dodoma Municipal. Th...
ABSTRACT This paper aims at an extended understanding of the design facilitators' role, here implementation mediators, in participatory design practices. In reflecting connectedness between use and design in a distributed open source software design practice, a particular focus is devoted to the implementation mediator’s interaction between local users, global software developers, and local designers who are geographically distributed, possess different technological skills, and different...
Abstract Background & Aim: The study was conducted in the aim to figure out the demographic factors that fueling prevalence of H.I.V/AIDS in 2011/12-Mbeya region. The demographic data of the cross-sectional years 2011/12 was used. The study encompassed male and female individuals aged 15-49. Methods & Materials: The binary logistic regression model was used employed and demographic factors that were considered to have an impact on the prevalence of the epidemic were included in our analysis. ...
Abstract . We obtain new regular exact solutions to the field equations for uncharged relativistic stellar objects with vanishing pressure anisotropy. We assume a quadratic equation of state and a choice of measure of anisotropy and a metric function defining one of the gravitational potentials. In our exact models, we regain anisotropic and isotropic results generated by other researchers as a special case. It is interesting that our results are in agreement with Minkowski space-time and ear...
ABSTRACT The antibiotic susceptibility pattern of aerobic mesophilic bacteria isolated from kunu samples sold in Ile-lfe, Osun State, Nigeria was studied following standard microbiological methods. Seven ready-to-drink kunu samples were purchased from different hawkers at Ile Ife. The samples were transported immediately in ice bucket to the laboratory for analysis. The aerobic mesophilic bacteria associated with kunu samples were isolated, labeled and identified by phenotypic and biochemica...
Abstract In this research we studied Fourier transform and Fourier Analysis. We first introduced an analytical formulation using Hilbert space. We utilized the principle of uniform boundedness and the open mapping theorem to establish the convergence of Fourier series and the existence of Fourier transform. Here the geometry of Hilbert space has been involved. Then we applied Fourier transform to Engineering problems, these include Motion group, Robotics, Statistical mechanics, Mass de...
Abstract This is case-control analytical study that aimed to determine platelet count and indices , also to detect hemoglobin electrophoresis and sickling test in sickle cell patients in Khartoum state. This study was conducted during September-2018 to April-2019 in Khartoum state. following informed consents, one hundred person were included (fifty were cases (26 males and 24 females) and fifty were controls (25 males and 25 females)blood samples were taken from both group at Alzaytouna Spe...
Abstract This study was aimed to assessment of grid alignment for radiology departments in Khartoum state. A total of 15 x-ray units in radiology departments in Khartoum state were tested by grid alignment test tool and the optical density for radiographic film was read by transition densitometer. In this study the final result showed that the percentage of grid misalignment for x-ray machines (66.7%) greater than the grid alignment x-ray machines (33.3%). The final assessment of grid misali...
Abstract The purpose of this study to assessment radiation dose of CT scanner on brain by calculate effective dose , then to confirm is there any difference between effective dose of male brain and female brain according to differences at anatomical structure of male brain and female brain , and to determine typical parameter that help to reduce overdose . This study performed in Modern Medical Center , the study showed amount of average effective dose (1.26756002 mSv ± 0.2 mSv ) and it's n...
ABSTRACT The main goal of this study was to develop aready-to-serve gluten free vegetables based infant food product with high nutritional value, high physicochemical, microbial and organoleptic characteristics in order to contribute in solving the problem of children malnutrition in Sudan. The results obtained in this study indicated that the developed vegetables based infant food product was found with high levels of available carbohydrates (68.32%), total sugars (12.75%) and protein (6.7%...
Abstract Some of the mechanical properties of polymer, such as tensile test, creep and swelling, were studied for two types of tire rubber at different concentrations of black carbon(70% ,30%) respectively. In the tensile test, the elasticity modulus was calculated and found that it was 7.836 MN/m2. Also in the study of creep, the time-dependent creep modulus and the creep compliance were calculated. Then the swelling behavior was introduced using three chemical solutions, namely methane, ace...
Abstract 57Fe Mössbauer spectroscopy is one of the most powerful tools that used in studying magnetic properties of materials. This work aims to investigate the magnetic properties of MgxSrxMnxCo1-3xFe2O4 (x = 0, 0.1, 0.2, 0.3 and 0.33) nanoparticles annealed at 500 ˚C. The aim extends to study the magnetic properties of BaFe2O4 sample as a function of different measuring temperatures. The results showed that magnetic hyperfine fields of the annealed samples were larger compared to as-prep...