Solving Ordinary differential equations with variable coefficients

ZZ transform, whose fundamental properties are presented in this paper, is still not widely known, nor used, ZZ transform  may be used to solve problems without resorting to a new frequency domain . In this paper, we use ZZ Transform to solve Ordinary Differential equations with variable coefficients. The result reveals that the proposed method is very efficient, simple and can be applied to linear and nonlinear differential equations

An Application of New Transform " Mahgoub Transform" to Partial Differential Equations

In this paper .The Mahgoub Transform of partial derivatives is derived, and its applicability demonstrated using five different partial differential equations. In this paper we find the particular solutions of these equations. The result reveals that the proposed method is very efficient, simple and can be applied to linear and nonlinear problems. Keywords: Mahgoub Transform-Partial Differential Equations- wave equation- heat equatio

On The Relationship Between Aboodh Transform and New Integral Transform " ZZ Transform"

In this paper we discusses some relationship between Aboodh transform and the new integral transform called ZZ transform, we solve first and second order ordinary differential equations with constant and non-constant coefficients , using both transforms ,and showing ZZ transform is closely connected with Aboodh transform. Keywords: Aboodh Transform, ZZ Transform, Differential equation

Role of cross-shell excitations in the reaction 54Fe(d_pol,p)55Fe

The reaction 54Fe(d_pol,p)55Fe was studied at the Munich Q3D spectrograph with a 14 MeV polarized deuteron beam. Excitation energies, angular distributions and analyzing powers were measured for 39 states up to 4.5 MeV excitation energy. Spin and parity assignments were made and spectroscopic factors deduced by comparison to DWBA calculations. The results were compared to predictions by large scale shell model calculations in the full pf-shell and it was found that reasonable agreement for energies and spectroscopic factors below 2.5 MeV could only be obtained if up to 6 particles were allowed to be excited from the f_7/2 orbital into p_3/2, f_5/2, and p_1/2 orbitals across the N=28 gap. For levels above 2.5 MeV the experimental strength distribution was found to be significantly more fragmented than predicted by the shell model calculations.Comment: 9 pages, 12 figures, 3 tables, submitted to European Physical Journal

Simulation Study on the Open-Circuit Voltage of Amorphous Silicon p-i-n Solar Cells Using AMPS-1D

AMPS-1D (Analysis of Microelectronic and Photonic Structure) simulation program was used to simulate Amorphous Silicon p-i-n Solar Cell. The simulated result of illuminated current density-voltage characteristics was in a good agreement with experimental values. The dependence of the open-circuit voltage on the characteristics of the a-Si:H intrinsic layer was investigated. The simulation result shows that the open-circuit voltage does not depend on the thickness of the intrinsic layer. The open-circuit voltage decreases when the front contact barrier height is small or the energy gap of the intrinsic layer is small. The open-circuit voltage increases when the distribution of the tail states is sharp or the capture cross sections of these states are small. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3432

Assessment of Thermal Comfort in Operating Rooms Using PMV-PPD Model

Operating rooms (ORs) are the most critical and expensive sector of healthcare facilities. The air conditioning system is designed to provide a well-controlled indoor air quality (IAQ). This design guarantees a perfect infection control and a good thermal comfort of patient and operating staff.This paper aims to analyze and evaluate indoor thermal comfort at different cases to assign the proper inlet air temperature to the OR. The predicted mean vote (PMV) and the predicted percentage dissatisfied (PPD) models in accordance with ISO 7730 were used for this study.Field measurements were first carried out in an OR at Kafr El-Sheikh educational hospital to get the thermal environment parameters. These parameters are required to determine the thermal comfort indices namely (PMV & PPD). Four different cases of supplied air temperature 17.5, 18.5, 19.5 and 20.5oC were studied and compared through 105 measuring points distributed in the operating room. The PMV and PPD indices were computed at each case for three groups of medical staff: surgeons (metabolic rate equal to 120 W/m2), nurses and surgeon\u27s assistants (100 W/m2), anesthetists (70 W/m2).The results revealed that inlet air temperature has a minor effect on the air velocities and airflow patterns inside the OR at the same air change rate. For the current ventilation system, it is difficult to create a very comfortable work conditions for all operating staff at the same time due to their different thermal requirements. It was concluded that a supplied air temperature of 18.5oC provides almost comfortable conditions for all surgical staff

Effect of Motivational Program on Modification of Impulsivity among Cairo University' Nursing Students

This study aimed to evaluate the effect of developed Motivational Program titled "Motivation Program for Change of Impulsive Behavior" on modification of impulsive behaviors of Cairo University' nursing students – into controlled socially acceptable behavior as compared with the comparison group. The development of this program is based on the Trans-theoretical model of change (TTMC) and composed of 15 semi-structured sessions. A mixed design of both quantitative and qualitative methods was used in this study.  It included a quasi experimental nonequivalent comparison groups (pre / post test) and semi structured interviewing sessions. Purposive sample for the study group was  recruited from all nursing students of the faculty of nursing (target population) who were screened for highest scores of impulsive behavior using the "Impulsive Behavior Scale"  and accepted to participate in the study (n=17). In addition to the Impulsive Behavior Scale another two tools for data collection were used in the current study; the Demographic and some personal data sheet and Video recording of the interviewing sessions. Results showed that, more than ninety percent of the target population had moderate to severe impulsivity and about ten percent had mild impulsivity. A highly statistically significant difference was found between pre and post program regarding improvement on the "Impulsive Behavior Scale" as well as between the study and comparison groups post program. Qualitative results showed the control of emerged new seven major themes of students' impulsivity. In conclusion, the study proved that "Motivation Program for Change of Impulsive Behavior" had significant effect on changing the impulsive behavior of the study group post the program and in comparison with the nonequivalent comparison group. Therefore, this study recommends establishment of a center for modification of Cairo University nursing students' impulsive behaviors using this program. Keywords: Motivational Program, Impulsive Behaviors, Cairo University, Nursing Student

Microbiological monitoring of ultrapure dialysis fluid in a hemodialysis center in Alexandria, Egypt

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