A NEW DESIGN of SIX- PHASE ROTARY CONVERTER ELECTRIC MACHINE

The aim of this research is to design a new ac rotary converter machine to convert the ac single phase voltage to six-phase voltages by using multi stages energy conversion machine. The rotary converter is composed from two main stages and is combined into one frame. These two stages are formed from three main electromagnetic components. The first component represents the input stage that enables the energy from single phase to enter and transformed by the second and third components electro-magnetically to produce six-phase voltages which at the output stage. The programs are created using MATLAB in order to calculate the required dimensions of the converter machine and its parameters for magnetic and electrical circuits

The Effect of Adding Stiffener on Deflection of Loading Arm by Using BEM & FEM

In this study we are concerned to improve the deflection of the loading arm with new suggested style , where the BEM techniques has been used to estimate a deflection at each distance (x) for the main part of loading arm pipe (3'') , thereafter a simplified stiffener has been added to optimize a moment of inertia of this main part thereby the deflection will be better , for this purpose a case study has been considered according to international standard for the pipe specification that  investigated to illustrate the goal of this work, adding to this ANSYS  program  has been used to verify the calculation

Response of Some Bread Wheat Genotypes (Triticum aestivum L.) to Salinity at Early Growth Stage

This study aimed to detect the salinity harsh influence on germination of Triticum aestivum L. seeds, seedling growth and some physiological defense mechanisms to determine the salt- tolerant genotype. The study conducted as a completely randomized design with 3 replicates for each treatment. Four bread wheat genotypes; Hawler- 2, Azady, Adana, Rabeae were subjected to two irrigation patterns; tape water (control) and 100 mM NaCl (salt stress). The highest percent of germination; 46.77 recorded by Rabeaa genotype. Meanwhile Azady and Rabeaa had highest mean germination time (MGT); 16.71 and 16.03 respectively. Longest root was exhibited by Adena;10.50 cm. while longest shoot represented by Hawler-2; 16.40 cm. Highest dry weight of root was 1.01 g. Root: shoot ratio; 1.63 exhibited by Rabeaa. Hawler- 2 showed minimum chlorophyll a; 0.90 mg/ g. Lowest chlorophyll b and total content observed in Adena; 2.18 and 2.3 mg g-1 respectively. Azady and Rabeaa recorded higher MSI%; 43.3 and 43 % respectively as compared to others. Rabeaa recorded highest water content, proline and sugar content; 22.7, 0.31 and 11.56 mg g-1. Therefore, it could suggest that Rabea and Azady can be successfully grown under 100 mM NaCl saline condition

AuNx stabilization with interstitial nitrogen atoms: A Density Functional Theory Study

Researchers have been studying 4d and 5d Series Transition Metal Nitrides lately as a result of the experimental production of AuN, PtN, CuN. In this paper, we used the Density Functional Theory (DFT) implementing a pseudopotential plane-wave method to study the incorporation of nitrogen atoms in the face-centered cube (fcc) lattice of gold (Au). First, we took the fcc structure of gold, and gradually located the nitrogen atoms in tetrahedral (TH) and octahedral (OH) interstitial sites. AuN stabilized in: 2OH (30%), 4OH and 4TH (50%), 4OH - 2TH (close to the wurtzite structure) and 6TH (60%). This leads us to think that AuN behaves like a Transition Metal Nitride since the nitrogen atoms look for tetrahedral sites. © Published under licence by IOP Publishing Ltd

Behavior of Recycled Aggregate Concrete Slender Column under Concentric Axial Loading

This investigation investigates the structural behavior of slender reinforced concrete RC containing different RCA replacement portions in addition to the slenderness effect. To perform this, eight (8) slender RC columns with two main types of transverse reinforcement (ties and spiral reinforcement) and three recycled coarse aggregate RCA replacement percentages (25, 50, and 100%) were modeled and subjected to axial concentric loading. The gathered experimental results are monitored and analyzed to better estimate the structural characteristics of the RC slender column (The ultimate carrying load, first cracking load, load-displacement curve, and load-strain response). The results showed that replacing NCA with (25, 50, and 100%) of RCA reduced the ultimate capacity of tied RC columns by (13.41, 14.07, and 23.33%), respectively, and reduced their first cracking load values by (19.64, 15.96, 22.50%), respectively. The reduction in ultimate load capacity and the first cracking load were (4.10, 17.33, 22.63%) and (12.26, 23.15, 25.00%) for spirally RC columns, respectively. Spiral transverse reinforcement slightly increases the carrying load capacity compared to tie reinforcement. It delays the fast propagation of the first cracking load, furthers the effect of spiral reinforcement in improving the deformation capacity, reducing the longitudinal and lateral mid-height strains, and developing the flexural stiffness of the load-displacement curve

Strengthening of Recycled Aggregate Concrete Slender Column with CFRP

This piece provides an overview of an experimental program that tests the structural performance of slender recycled aggregate RAC columns that are externally restrained by carbon fiber reinforced polymer (CFRP composite system). To demonstrate that the CFRP strengthening system is one of the recommended effective techniques for making up for the reduction in load-carrying capacity caused by the use of 100% RCA in combination with the slenderness of column specimens, eight slender circular RC columns were modeled and tested. To more accurately predict the structural features of the RC thin column (the ultimate carrying weight, first cracking load, load-displacement curve, and load-strain response), the findings from experiments have been analyzed and monitored. The findings indicated that the type of transverse reinforcement and the amount of external strengthening impact the degree of improvement in column performance. The strength for the tied RC columns with 100% RCA confined by (25, 50, and 100) % CFRP increased by 5.5, 44.97, and 112.85%, respectively, compared to control columns with no CFRP confinement. Similar strength improvements are seen in spirally RC columns with 100% RCA and the same external confinement coverage ratio: 10.32, 42.81, and 113.51%

Options for calibrating ceres-maize genotype specific parameters under data-scarce environments

Open Access JournalMost crop simulation models require the use of Genotype Specific Parameters (GSPs) which provide the Genotype component of G×E×M interactions. Estimation of GSPs is the most difficult aspect of most modelling exercises because it requires expensive and time-consuming field experiments. GSPs could also be estimated using multi-year and multi locational data from breeder evaluation experiments. This research was set up with the following objectives: i) to determine GSPs of 10 newly released maize varieties for the Nigerian Savannas using data from both calibration experiments and by using existing data from breeder varietal evaluation trials; ii) to compare the accuracy of the GSPs generated using experimental and breeder data; and iii) to evaluate CERES-Maize model to simulate grain and tissue nitrogen contents. For experimental evaluation, 8 different experiments were conducted during the rainy and dry seasons of 2016 across the Nigerian Savanna. Breeder evaluation data were also collected for 2 years and 7 locations. The calibrated GSPs were evaluated using data from a 4-year experiment conducted under varying nitrogen rates (0, 60 and 120kg N ha-1). For the model calibration using experimental data, calculated model efficiency (EF) values ranged between 0.88–0.94 and coefficient of determination (d-index) between 0.93–0.98. Calibration of time-series data produced nRMSE below 7% while all prediction deviations were below 10% of the mean. For breeder experiments, EF (0.58–0.88) and d-index (0.56–0.86) ranges were lower. Prediction deviations were below 17% of the means for all measured variables. Model evaluation using both experimental and breeder trials resulted in good agreement (low RMSE, high EF and d-index values) between observed and simulated grain yields, and tissue and grain nitrogen contents. It is concluded that higher calibration accuracy of CERES-Maize model is achieved from detailed experiments. If unavailable, data from breeder experimental trials collected from many locations and planting dates can be used with lower but acceptable accuracy

Synthesis and Characterization of Novel Polyacetylene and Poly Diacetylene Substituted with Thiosaccharin

novel polyacetylene & Polydiacetylene Substituted with thio Saccharin were Synthesized by two routes , first polymerization of terminal propargyl Saccharin ( laboratory prepared ) to produce polyacetylene PAS , under nitrogen gas, in presence of PdCl2 in DMF. The Polymerization reaction was carried on for 4hrs. at 30c0 (Yield 78%). Second procedure was used to product PAS using Microwave Radations under the same conditions at 400 W, for 10 minutes , (Yield 70% ). Another route was polymerization diacetylene (laboratory prepared) to produce Polydiacetylene PDAS ,The Synthesis approach to PDAS is based on Oxidative Coupling polymerization under oxygen gas and THF, In basic medium (pyridine) and present CuCl , PdCl2 as Catalytic , The polymer Yield 82% at reaction temperature 40 C0 in 5 hrs. Instrumental analyses such HNMR , FR-IR ,Spectroscopies. These Indicated that the new materials have Conjugated polymers within designed Substituents Saccharin

Isolation of Lactobacillus salivarius from Children and Purification of Bacteriocin to Inhibition Cancer Cell in Vitro

Bacteria being used to make anticancer agents could provide an extra source of lead compounds for the pharmaceutical industry.  Bacterium Lactobacillus salivarius produce compounds that selectively inhibit growth of human cancer cells Lactobacillus salivarius naturally produces a compound called Bacteriocins.  Bacteriocins are bacterial proteins produced to prevent the growth of competing microorganisms in a particular biological niche and we can use it as antineoplastic. The aim of this study was to isolate bacteriocin produced by lactic acid bacteria. A preparation of bacteriocin from a strain Lactobacillus salivarius has long been shown to have antineoplastic activity against a variety of human tumor and animal tumor cell lines in vitro. A total of 60 LAB  were isolated from children stool 45 isolate showed a clear antimicrobial activity against indicator strain Streptococcus aureus and by used sodium phosphate buffer (pH8) from an 80% ammonium sulfate precipitate. The inhibition  activity was determent by well diffusion assay method technique, Bacteriocin purification processes were carried out by using ion-exchange (Trisacryl SP) and gel filtration chromatography (Sephacryl – S300). The apparent molecular mass of partially purified bacteriocin was 15. 848 kDa,  Cell Culture was maintained in RPMI 1640 medium supplemented with 10% (vol/vol) fetal calf serum,  Cytotoxicity of bacteriocin was assessed on human cell line (RD) and animal cell line (MDCK) cell viability after incubation for 48 h in medium containing 500AU/ml (1.15 mg/ml). Both cell types used in this study were sensitive to bacteriocin and the bacteriocin appeared to inhibit proliferation of tumor cell line. The animal cell line was more sensitivity than human cell line

Laparoscopic Low Anterior Resection using Endo GIA Radial Reload Stapler: early results (case series)

Background: Laparoscopic colectomy is performed in an increasing number of institutions as a minimally invasive treatment for benign and malignant large bowel disease. Laparoscopic rectal surgery enables more accurate visualization of the anatomical structure in the pelvic cavity for selected patients with tumors in the middle and low rectum. Objectives: To determine the early outcome of patient who underwent laparoscopic low anterior resection using radial reload stapler. Patients and methods: This is a prospective study of 8 patients with low or mid rectal cancer who underwent a laparoscopic low anterior resection between January 2017 till June 2017 at Saint Raphael hospital. Results: Eight patients underwent elective laparoscopic low anterior resection, 5 (62.5%) of them were male and 3(37.5%) were female. In 6 (75%) patients complete rectal transaction done only radial reload stapler, while the other 2 (25%) patients complete transaction couldn’t be done only by the radial reload stapler and they need one Endo GIATM (Covidien) medium thick purple stapler. There was no anastomotic leakage, no wound infection and no mortality. Conclusion: The primary results and early outcome of this study showed that laparoscopic low anterior resection using radial reload is a safe procedure without increasing the risk of anastomotic leak. Further analysis in a large series is needed to draw definitive conclusions