http://148.72.244.84/xmlui/handle/xmlui/15738 كل نتاجات السادة التدريسين في جامعة ديالى لعام 2020 2026-04-21T15:33:37Z http://148.72.244.84/xmlui/handle/xmlui/16405 Title: Effect of soaking hours in different concentrations of seaweed extract on green feed yield, dry matter and quality for fenugreek (trigonella foenum - Graecum l.)(Article) Authors: مروان سامي سعيد, Said, Marwan Sami Abstract: Experimental was carried out at the field of agricultural college, University of Diyala for the season 2017-2018 in order to study the response of the of Fenugreek plant properties (green fodder, the dry matter and its quality) to seed soaking hours of seaweed extract. The experiment was conducted with the Randomized Complete Blocks Design (RCBD) in the factorial experiments arrangement with three replicates. The seeds of Fenugreek were soaked in two concentrations (1 ml and 2 ml) of seaweed extract in addition to water as a control for 12 (W1), 24 (W2) and 36 (W3) hours. The results showed that there was a significantly positive effect on all studied attributes by the interaction between soaking hours and the concentration of seaweed extract. The W2 treatment was significantly higher in the dry matter (4.35 t. h-1), crude fibre percent (38.7 %) compared to the control. The two concentrations of seaweed extract had a significant effect on all studied attributes in which the 2 ml concentration was the highest compared to other treatments. © 2019 Plant Archives. All rights reserved. 2019-01-01T00:00:00Z http://148.72.244.84/xmlui/handle/xmlui/16307 Title: Evaluation of performance of selected tillage tines regarding quality of work Authors: عامر خالد احمد, Amer K. A. Al-Neama Abstract: This book examines and evaluates the performance of four standard chisel plough tines: heavy duty, double heart, double heart with wings and duck foot, which were connected with a rigid shank. Experiments were conducted in a soil bin filled with sandy loamy soil, and the experimental factors included varying operation conditions (speed and depth) and their dependency upon a draft force and their components (horizontal and vertical force), specific force (force per unit area), specific power (power per unit area), soil loosening percentage (above and below the original soil surface) and soil profile parameters (e.g. furrow height, furrow width, ridge height, area of ridge and furrow etc.). The evaluation involved developing regression equations based on Glancey and Upadhyaya’s model by adding new terms related to the tine geometric parameters or by adding a dummy term variable. These two techniques made up the general study parameters and had the same trend effect on operation conditions to compare between tines. Lab results such as force components and the width of furrow were verified in a field test. Furthermore, a model to predict the draft force by using principles of soil mechanics and soil profile evaluation was designed. 2020-01-01T00:00:00Z http://148.72.244.84/xmlui/handle/xmlui/16163 Title: Nonlinear identification of cancer tumour dynamic model using data-driven methods with control Authors: علي خضير مطلك الجبوري, Al-Jiboory, Ali Khudhair Abstract: Data-driven modeling has rapidly emerged as a prominent tool in modelling complex biological systems. This paper delves into the application of the Sparse Identification of Nonlinear Dynamics (SINDy) algorithm and Dynamic Mode Decomposition with control (DMDc) to identify the underlying nonlinear dynamics of a cancer tumour model. The primary objective was to assess the algorithm's efficacy in identifying the complicated dynamics of such systems. Results showed that the SINDy algorithm remarkably captures state variables of the system, especially those that display polynomial or linear behaviour. It demonstrates significant alignment with the actual mathematical model, highlighting its potential in modelling complex systems. The findings confirm the potential of SINDy as a formidable tool in biological data-driven modelling. The study also suggests that further refinements in the library matrix and the inclusion of domain-specific knowledge could potentially enhance the accuracy of the algorithm, making it an invaluable asset in nonlinear identification of dynamical systems. 2017-01-01T00:00:00Z http://148.72.244.84/xmlui/handle/xmlui/16134 Title: CONTROL OF FLOW SEPARATION OVER NACA 0015 AIRFOIL USING SYNTHETIC JET ACTUATORS Authors: خضر نجم عبد, Abed, Khuder N. Abstract: In this paper the concept of active flow control using an array of synthetic jet actuators has been investigated. Synthetic jets are the one type of actuators that will be used in this research to introduce important modification to the pressure distribution levels that appear over the lifting surface of airfoil model when the flow separation exists. Two synthetic jet actuators arrays were used; the first one placed at 3% c and the second array located at 6% c on the upper surface of a NACA0015 airfoil. The experiments are conducted at Re=455000 in 8 different angles of attack 0º to 15º using the wind tunnel at University of Diyala. The first part of this paper concentrates on making comparison of the collected experimental data of the pressure distribution over NACA0015 airfoil at Re = 4.4x105 at angle of attack varied from 0.0 to 20 degrees without synthetic jet actuators (baseline case study) and previous experimental results as a baseline validation of the onset of flow separation location. Figure 3 and 4 clearly showed that the pressure distribution and the calculated lift were converged in the stall region at high angle of attack. In the second part of this study we had utilized a NACA0015 airfoil of 300 mm chord length with a rounded leading edge of 20 mm diameter. 18 discrete synthetic jet actuators with 1.2 mm diameter is distributed along the lifting surface of the wing. This distribution is used to investigate the effect of jets and vertical structures on the characteristics of pressure coefficients (Cp) and flow separation over the airfoil. Pressure and lift coefficients have been measured and calculated by using surface pressure measurements technique that uses 29 pressure tapings over the lifting surface of the wing. A piezo-ceramic diaphragms technology of 15mm diameter have been used in the experiments and excited at a variety of frequencies (resonant frequency and vortex shedding separated flow frequency) in order to get the effective interaction between the synthetic jets and separated boundary layer which is the most significant parameter of producing the vertical structure that affects the flow separation. The results showed that at 3% c SJA location, the best enhancement in the lift was seen at Vp-p of 8 which increased by about 0.1. However, the overall results showed that maximum enhancement in lift of about 0.2 at 6% 2017-01-01T00:00:00Z