Journal of Education for Pure Science-University of Thi-Qar

The use of air conditioning-water heating hybrid system for heating, cooling and hot water ofbuildings, has significantly importance for energy saving. It has been proposed a system to recoverthe waste heat of refrigerant after leaving the air conditioning system condenser in the heating modeand the waste heat of refrigerant after leaving the air conditioning system compressor in the coolingmode to heat water for domestics or other needs. Shell and tube heat exchanger has been designed asa refrigerant-to-water heat exchanger located between the condenser and the expansion valve in theheating mode and between the compressor and the condenser in the cooling mode. The simulationprogram of heat exchanger has been built by using (MATLAP) in order to determining the heattransfer parameters and the temperature difference between the inlet cold water and outlet hot water,the results show that the effectiveness decrease with increase of water mass flow rate, while increasewith increase of tube length. As the tube length (15) m, the outlet hot water temperature from heatexchanger is (60.94) °C, for water mass flow rate (0.15) kg/s, and this value decrease exponentiallyand reach to about (7.528) °C, for water mass flow rate (2) kg/s, while for tube length (5) m, thesevalues ranging between (43.92) °C, to (1.234) °C, respectively.

The problem of find approximate solution for the first order linear ordinary delay differentialequations by using two of the special cases of the weighted residual method which are the leastsquares method and Petrov-Galerkin method with compare between these methods for which the bestapproximate solution near to the exact solution, also numerical applications are considered in thiswork.

Majority problems related to climatic conditions within the infant incubator. Premature birthis from world-wide problem. control of incubator environment is a more important than others inpremature infants. Premature infants are often care for infant incubators give convective heating.Where control of the oxygenconcentration,temperature, and relative humidity using Wireless SensorNetworks (WSNs) are the main objectives of this system. Achieving the proper climatic conditionsto ensure a suitable environment within the infant incubator target a lot of investigations for sometime. Various plans of control theories have been applied in this area to solve the aboveproblems.Thispaperis submitted to the "Al-Habboubi Teaching Hospital" maternity hospital inNasiriyah. The proposed system technique by using Fuzzy Logic Controller (FLC) that is used inorder to simulate the infant incubator monitoring.

The aim of this study was measuring the concentrations of cadmium and mercury in milk ofnursingmothers who living in Al-Muthanna governoratein southern of Iraq, 62 samples of mother'smilk were collected after six weeks of birth at the maternity and children hospital in Samawah city,from 13/11/2016 to 23/4/2017. Samples were divided according to living area, job, smoking andage. The average of cadmium and mercury concentrations were (1.09) (0.31) μg/dl respectively, thehighest measured values of cadmiumandmercury concentrations were (3.62) and(0.75)μg/dlrespectively. The study showed a significant difference in the rates of cadmium and mercuryconcentrations of lactating mothers living in urban areas than those who living in rural areas.Therates of cadmium and mercury concentrations for employee and workers mothers were significantlyhigher than those of non-working mothers.Cigarette smoke had the greatest effect on levels ofcadmium and mercury concentrations. These concentrations for lactating mothers who smoked ordirectly exposed to cigarette smoke were higher thannon-smokers. the study showed a very smallincrease in concentrations of cadmium and mercury among lactating mothers who are over 25 yearsthan under age of 25 years.

The aim of this study is to investigatingthe climate characteristics of the southern Iraqi city ofNasiriyahusing Modern-Era Retrospective Analysis for Research and Applications, version 2(MERRA-2) data for the period 1980-2016. The data includes monthly mean values of airtemperature, relative humidity, atmospheric pressure, wind speed and direction, and monthly totalof rainfall. Results indicate that the temperature is ranging between 10 (during winter) and 40 oC(during summer). The city is characterized by wet winter and a very dry summer. Low pressurevalues prevail during summer and higher values prevails during winter. Wind speed ranges from 1during winter to more than 7 during summer and mainly blowing form west and north west. Therainfall pattern shows that rainfall during the rainy season (October-May) in the city varies formone year to another and there is no distinct trend for rainfall. Time series and trends analysis oftemperature and rainfall showed an increasing in temperature during July and slight decreasing inJanuary. The relative humidity has showed very small variation during the period 1980-2016. Theannual rainfall was found to be decreasing.

In the present study the blue green algae Chroococcus sp. was isolated and from different areas ofthe Euphrates River in the city of Nasiriyah after its purified and in the liquid culture medium (Chu-10 medium). The Histopathological effects of algae on Poecilia sphenops were studied afterfeeding on it and for two periods of (3) days and (14) days.The weight of fishes was test decreasing the weight in the group 2 and 3 cowperal with groupcontrol histological study showed that this algae causes obvious histopathological changes in thegills, which increases its intensity and diversity with the length of the period of eating fish foralgae. This changes represented by detachment of epithelial layer of the secondary gill lamellaeand change in the straight shape of the secondary gill lamellae which have different shapes ,Hypertrophy in some epithelial cells of the secondary gill lamellae, hyperplasia in secondary gilllamellae , aneurism and congestion of blood capillary of secondary gill lamellae, aggregation ofchloride cells and necrosis in epithelial cells of the secondary gill lamellae.

This study is designed to investigate the effect of aqueous extract of green tea leaves in kidney andliver functionsand hisological changes. It carried out on 36 wister albino male rats,which divided intosix groups (each group 6 rats) and treated as following: first group which received normal saline (0.9NaCl)as control group,second and third groupsreceived green tea (100, 200 mg/kg) respectively.While fourth group injected by gentamicin (100 mg/kg i.p), fifth and sixth groups injected bygentamicin at the same dose above, then after one hour these groups (5 and 6) administered extract ofgreen tea at (100, 200 mg/kg) respectively, time of experment is 10 days, The results showed asignificant increase (P≤0.05) in levels of urea and createnine in gentamicin group compared withcontrol group and other groups, createnine increased significantly (P≤0.05) in sixth group comparedwith control group and third group (treated with extract of green tea 200 mg/kg) only. Results alsorevealed a significant increase (P≤0.05) in levels of Glutamic Oxaloacetic Transaminase(GOT) ingentamicin group compared with control group, in fifth group (GOT) increased significantly(P≤0.05) compared with second group (100 mg/kg) only, Glutamic pyruvic Transaminase(GPT)andAlkaline phosphatase (ALP)levels increased significantly (P≤0.05) in gentamicin groupand fifth group (gentamicine+ green tea 100 mg/kg) compared with control group and other groups.,also the different between these both groups was significantly (P≤0.05). Results of hisological studyconfirmedthe toxicity of gentamicinand protective effects of green tea leaves extract in kidney andliver.

The diffraction ring pattern and Z-scan techniques are used to estimate both the nonlinear refractiveindex, n2, and nonlinear absorption coefficient, β, of Henna oil using low power continuous wave(CW) visible laser beam. The values of n2 and β are obtained of 1.72 x 10-7 cm2/W and 1.21x10-3cm/W respectively.

AbstractAt this time, most of the Arab countries were used these modern technologies just for the protest orindignation of the present services that provided from government or companies. In the developedcountries were dominated on the empirical studies on the social networking tools in educationalinstitutions. Regrettably, most of these studies were conducted in developed countries. In the samecontext, in the Middle East as a developing countries are deemed as the first place that harnesses thesocial networking tools in the political events through Arab Spring. Consequently, the currentempirical study focused to determine the influence of the use social media among undergraduatestudent, in particular the Dhi-Qar University. The current study seeks in concentrating on the aspectsof potentiality of the social media and its role in educational institutions specifically on theutilization of collaborative learning as well as the enhancement of the students’ performance as awhole in terms of academics. The study selected the students randomly from the Mass Media in Thi-Qar University. With regard to data analysis, second statistical generation (SEM-PLS) technique andthe first statistical generation (SPSS v.23) were used as the instruments for analysis purpose.Theresults indicated that, there was a strong positive relationship between the engagement andcollaborative learning and collaborative leaning with student academic performance.

The present study aimed to detect the role of MTHFR gene and their relationship in the incidence ofCongenital heart defects in Dhi Qar province, through the use of PCR- RFLP technique on this basiswere collected 120 blood samples (from Nasiriyah heart Center) in tubes container on EDTA frompatients with congenital heart defects ages ranging between (a month - 17 years) and 110 samplesfrom healthy people ages ranging between (a month - 17 years) and saved directly at a temperatureof - 20 ° C for use in the extraction DNA and the PCR technique.The results of the statistical analysis of the lack of correlation between polymorphism of the geneMTHFR and the incidence of congenital heart defects when compared to the comparison group Andeach of the mutant homogenized style(CT) (OR= 0.86 ; 95%CI= 0.41-1.81) The style of the mutantdifferential(TT) (OR=0.42 ; 95%CI= 0.22 - 0.79) .The results of the current study has shown an increased risk of congenital heart defects for womenwho have the mutant heterozygous (CT) almost twice (OR= 1.63 ; 95%CI=0.61-4.29). and theresults also showed that who have the mutant heterozygous (CT) and within the age group (month - 9years) has increased their risk of congenital heart defects (OR = 1.5 ; 95%CI= 0.36-6.23), resultsshowed an increased risk of infection with parents smokers about almost three times (OR = 2.5) andthe period of confidence (0.76 - 8.22) the presence of mutant homozygous (TT) while that possessthe mutant heterozygous (CT) increased their risk more than injury twice (OR = 2.13) and the periodof confidence (0.71 - 6.40).

AbstractAs we know that internet is being utilized for several activities by a great range of users andtheseactivities include communication, e-commerce, edification, education and regalement. Users arerequired to register regarding to a website in order to enroll web activities. However, registration canbe done by automated hacking software. That software make erroneous enrollments which occupythe resources of the website by reducing the performance and efficiency of servers, even stop theentire web accommodation. It is critical for the websites to possess a system that has the inclinationof varying human users and computer programs in perusing pictures of content.ConsummatelyAutomated Public Turing Test to Tell Computers and Human Apart (CAPTCHA) is a technique thatprotects websites against bots by generating and grading tests that humans can pass but currentcomputer programs cannot. For example, humans can read distorted text, but current computerprograms cannot. This study focuses on the CAPTCHA abilities of defensing a website fromscammers by discussion its algorithm and practical steps to apply it in a web form.

In this work, the quantum dot (QD) lasers dynamics were studied, with modulated injection current.A model of its rate equations were solved numerically using Runge-Kutta method. The effect of themodulation current amplitude, frequency and the bias dc current were included. The study shows thatthe QD lasers dynamics includes different behaviors such as stable, periodic, multi- periodic andself- pulsing, then the system ending to the chaotic state.

The optical modulator or chopper is an important component in optical systems. It is a device,which changes the angle between the vision line of the target and the coordinate of an electricalsignal. This paper has been designed as a new model of the fractal optical modulator. A new opticalmodulator involves two cycles (inner and outer). Each cycle of them consists of eighteen sections. Itis known that the sections of the optical modulator become two parts, nine sections considered aretransparent and the other sections are opaque to light. There are two parameters have taken to designthe optical modulator, first factor is the shape and second factor is the section number. A new opticalmodulator is made from three materials such as (Magnesium Fluoride (MgF2), Lithium Fluoride(LiF) and Sapphire (Al2O3) by using the fractal function. So an optical modulator is created bybuilding a computer program using the visual basic language. For the importance of the modulationtransfer function (MTF) in testing and evaluating optical systems, the dependent measurement isdone to know the optical systems efficiency. It has been studied the optical systems with a circularaperture, where that function could be evaluated the image efficiency for point object of image planeat different magnitude of the wavelength and thickness. In this research, the fractal optical modulatorhas been designed of insulator material by using the fractal function. It has been evaluated the valuesof MTF at different values of the wavelength and thickness. Also, we studied the relation betweenspatial frequency and number of sections, as well.

The aim of the study to investigatethe effects of mobile phones radiation on human health. Thestudyhas used a questionnairewithin contacton 158students, in college of science, Thi-QarUniversity,Iraqon symptoms which students are exposed during use of mobilephones. There isincreased incidence of focusingdifficulties is about (21%), headache (20%), dizziness (13.1%)andsleep disturbances (16.1%). Used significance at

The study was conducted to know the ability of the green alga Scendesmusdimorphus toaccumulate four heavy elements were copper, lead, cadmium and nickel in four concentrations (5,10, 15 and 20) mg / L for every one and then observed the effects of these elements on the shape ofthe cell and its internal structures by using the scanning electron microscopy technique. The resultswere showing that the copper ion was the least severe effect on the form and content of algae ascompared with the rest of the other elements, while cadmium was the most affect among theelements that were added. The results of the absorption spectrum that the order of absorption ofelements in terms of concentration was cadmium (0.78%) of the dry weight, followed by the copperpercent (0.33%) of the dry weight, the nickel and its concentration (0.18%) of the dry weight whilethe lead element was the least accumulation, Its concentration was ( 0.10%) of dry weight.

AbstractClustering isan unsupervised data mining technique used to extract a new knowledge. Itclusters a group of objects into clusters where objects in one cluster have similar fea- tures to eachother and have different features from objects in other clusters. K-means algorithm creates clustersby divides the data points into clusters according to similarity criterion. The K-means algorithmselect initial centroids randomly then slow convergence points to centroids. This paper suggests amethod for computing the initial centroids and fast convergence by using Quantum Particle SwarmOptimization with the global searching optimization which will give algorithm more efficient, so asto get quality clustering with reducedcomplexity.

AbstractThe aim of this research is to study the effects of the Mediterranean Oscillation Index: Algiers andCairo (MOIAC) on the temperature and precipitation patterns in Baghdad city in Iraq. Data of themonthly means of the MOIAC index, the monthly means of temperature, and the monthly total ofprecipitation were analyzed for the period 1958-2000. Pearson’s non-parametric test was used toinvestigate the correlations between these three variables. The time series of temperature andprecipitation showed no distinct trends. The results indicated that there is a slight correlation betweenMOIAC and temperature and precipitation suggesting that MOIAC has no major effects on thetemperature and precipitation patterns in Baghdad city.

The sterilization of candida albicans yeast was done by using atmospheric pressure non thermalargon plasma, the plasma jet system was used for this purpose with following operations conditions:the discharge voltage was (8) kV, with frequency (22) kHz and argon gas flow (3) l/min.This study included obtaining clinical isolate of C.albicans yeast which diagnosed initiallyaccording to its colonies appearance on SDA as a a smooth, creamy and mucosa colonies , while itcharacterized by a production of Pseudohyphae and the presence of chlamidospores on CMA, also ithas the ability to grow at 45 C , positive to germ tube production , Gram positive oval shape cells .This study also included investigation the inhibitory effect of cold plasma at different periodsof time on the yeast isolate growth, where the results obtained did not show any effect of coldplasma on the growth of the yeast during the first stage of exposure in seconds comparing to controlwhile it was noted a decrease in growth when increasing the exposure time to minute during thesecond phase of treatment till yeast growth entirely down to zero when the exposure period reached10 minutes, also This study was Investigated the inhibiting efficiency of cold plasma exposure onthe ability of C.albicans yeast isolate to produced germ tube before and after exposure to a nonthermalplasma where the results showed increased in the inhibition percentage of yeastgermination along with increased time of exposure from 59 % at exposure time 6 min down to 96%when the exposure time 9 min compared with the control,but the exposure to a non-thermal plasmadid not demonstrated demonstrated any morphological changes in yeast cells and their acceptance ofstaining compared to the control not treated with cold plasma .

AbstractThe mass fragmentation pattern of azetidine-2-one 3(c-e) and azetidne-2,3-dione 5f,5g in each casethe molecular ion peaks were observed corresponding to molecular weight of the coupled products.The base peaks were observed also for each compounds.the mass fragment

Multi-thickness polycrystalline zinc telluride (ZnTe) thin films were successfully deposited on TEC-15 glass substrates at different deposition temperatures ranging from 200C0 to 400C0 by a pulsedlaser technique. Two different sample sets of multi thicknesses (500nm, 750nm, and 1000nm) filmshave been fabricated on the same substrate using a designed software program to control a movingsubstrate holder that moves horizontally and vertically behind a metal blocker. This study shows thepossibility of fabricating different thickness layers on the same substrate in one fabrication processusing moving substrate PLD holder during the deposition. Atomic Force Microscopy indicated animprovement in the average crystallite size with the increase in film thickness and substratedeposition temperature. As well as higher surface roughness Ra was indicated for thicker layersfabricated at high temperature. XRD properties indicate that the fabricated samples arepolycrystalline, and the films exhibit preferred orientation along the (111-cubic) direction, which isstronger at the highest substrate temperature and thicker layers. This study discusses the strongdependency of crystalline quality on the deposition temperature and thin film thicknesses.

In this paper, we give a popularization form Phillips-Sazas-Type operators symbolize