2,521 research outputs found
The Role of Measuring and Evaluating Performance in Achieving Control Objectives- Case Study of "Islamic University"
The study aimed to identify the role of measuring and evaluating performance in achieving the objectives of control and the performance of the job at the Islamic University in Gaza Strip. To achieve the objectives of the research, the researchers used the descriptive analytical approach to collect information which is the questionnaire that consisted of (22) phrases were distributed to three categories of employees of the Islamic University (Faculty Members and Their Assistants, Members of the Administrative Board, Senior Management). A random sample of (314) employees was selected and 276 responses were retrieved with a recovery rate of 88.1%. The Statistical Analysis Program (SPSS) was used to enter process and analyze the data. The results of the research showed a positive role between measuring and evaluating the performance and achieving the objectives of the control of performance in the Islamic University from the point of view of the members (senior management, faculty and their assistants, and members of administrative board). The researchers also recommended a number of recommendations, most notably the provision of an appropriate level of the elements of the control systems today through the modernization and continuous development of performance measures and the need to provide the physical and financial resources necessary to continue the development and achievement within the university, to expand the development of technology in the various activities of the university through the construction of a complete and integrated system to support supervision systems in the university to suit the size of the university. The researchers also recommended following up and reviewing the performance measures and work to modify them in line with the mission and the goals of the university that it seeks to reach
The Relationship between Correcting Deviations in Measuring Performance and Achieving the Objectives of Control - The Islamic University as a Model
The study aimed to identify the relationship between correcting the deviations in the measurement of performance and achieving the objectives of control and the performance of the job at the Islamic University in the Gaza Strip. To achieve the objectives of the research, the researchers used the descriptive analytical approach to collect information. The questionnaire consisted of (20) statements distributed to three categories of employees of the Islamic University (senior management, faculty members, their assistants and members of the administrative board). A random sample of 314 employees was selected and 276 responses were retrieved with a recovery rate of 88.1%. The Statistical Analysis Program (SPSS) was used to enter, process, and analyze the data. The results of the study showed a positive relationship between correcting deviations in performance measurement and achieving the control objectives represented by the functional performance in the Islamic University from the point of view of the members (senior management, faculty and their assistants, and the administrative board), where the relative weight of all the paragraphs was (74.25%). The study recommended the need to ensure that the actual performance of the planned performance is matched and decisions are taken to correct the serious deviations and take the necessary measures in terms of retraining and change in regulations, wages and bonuses and punishment of the culprit, neglect and negligence by mistake
Isolation and Identification by PCR and Analysis for Probiotic Properties of Lactobacillus spp from Dairy Products.
Lactic acid bacteria (LAB) are very significant to human health and due to their ability to produce some antibacterial substances and ability to inhibit pathogenic bacteria, they are commonly used as a natural food preservative to improve food safety and stability,. The present study was focused on isolation and characterization of Lactobacillus spp from dairy products at local markets of Babylon province of Iraq, by conventional and molecular methods using PCR. Additionally, the study and to demonstrate some of probiotic properties of these isolates. All isolates were phenotypically characterized including studying the microbiological, biochemical, effect of sodium chloride and pH during growth, carbohydrates test and characterizing the antimicrobial activity of Lactobacillus spp against pathogens. The present study demonstrates that Lactobacillus spp produced a bacteriocin- like inhibitory substance with a broad spectrum of antimicrobial activity directed against pathogenic indicator organism suggesting its protective value against enteric pathogens. Keywords: Lactobacillus, identification, PCR, dairy product, antimicrobial activity, probiotic
Optimal stability and instability for near-linear Hamiltonians
In this paper, we will prove a very general result of stability for
perturbations of linear integrable Hamiltonian systems, and we will construct
an example of instability showing that both our result and our example are
optimal. Moreover, in the same spirit as the notion of KAM stable integrable
Hamiltonians, we will introduce a notion of effectively stable integrable
Hamiltonians, conjecture a characterization of these Hamiltonians and show that
our result prove this conjecture in the linear case
Enhancement of permeability estimation by high order polynomial regression for capillary pressure curve correlation with water saturation
Suggesting a cost-effective and straightforward approach is indispensable for obtaining permeability estimates in carbonate reservoirs utilizing available well logs. In this study, several procedures were conducted to reach an optimum approach, primarily by constructing a correlation between capillary pressure and water saturation using core data plotted and utilized a good polynomial regression to obtain a better relationship, which leads to calculating the permeability. The second step is to use different theoretical models which Tixier introduces, Timur, Coats, and Dumanior, which resulted not good matching with the permeability from core analysis and modified Brown and Husseini correlation which used and gave better matching than others correlations by comparing the results with the calculated permeability depending on core data. The proposed approach in this study based on modified Husseini equation using the well logs data by applying Statistical regression techniques within capillary pressure prediction to enhance reservoir characterization can potentially advantage reservoir simulation efforts. Obtained results of permeability prediction based on capillary pressure correlation was examined for a certain well and compared with the measured permeability value of cores. There was a good matching between the predicted and measured permeability
Double exponential stability of quasi-periodic motion in Hamiltonian systems
We prove that generically, both in a topological and measure-theoretical
sense, an invariant Lagrangian Diophantine torus of a Hamiltonian system is
doubly exponentially stable in the sense that nearby solutions remain close to
the torus for an interval of time which is doubly exponentially large with
respect to the inverse of the distance to the torus. We also prove that for an
arbitrary small perturbation of a generic integrable Hamiltonian system, there
is a set of almost full positive Lebesgue measure of KAM tori which are doubly
exponentially stable. Our results hold true for real-analytic but more
generally for Gevrey smooth systems
Generic perturbations of linear integrable Hamiltonian systems
In this paper, we investigate perturbations of linear integrable Hamiltonian
systems, with the aim of establishing results in the spirit of the KAM theorem
(preservation of invariant tori), the Nekhoroshev theorem (stability of the
action variables for a finite but long interval of time) and Arnold diffusion
(instability of the action variables). Whether the frequency of the integrable
system is resonant or not, it is known that the KAM theorem does not hold true
for all perturbations; when the frequency is resonant, it is the Nekhoroshev
theorem which does not hold true for all perturbations. Our first result deals
with the resonant case: we prove a result of instability for a generic
perturbation, which implies that the KAM and the Nekhoroshev theorem do not
hold true even for a generic perturbation. The case where the frequency is
non-resonant is more subtle. Our second result shows that for a generic
perturbation, the KAM theorem holds true. Concerning the Nekhrosohev theorem,
it is known that one has stability over an exponentially long interval of time,
and that this cannot be improved for all perturbations. Our third result shows
that for a generic perturbation, one has stability for a doubly exponentially
long interval of time. The only question left unanswered is whether one has
instability for a generic perturbation (necessarily after this very long
interval of time)
Height Fluctuations and Intermittency of Films by Atomic Force Microscopy
The spatial scaling law and intermittency of the surface roughness
by atomic force microscopy has been investigated. The intermittency of the
height fluctuations has been checked by two different methods, first, by
measuring scaling exponent of q-th moment of height-difference fluctuations
i.e. and the second, by defining generating
function and generalized multi-fractal dimension . These methods
predict that there is no intermittency in the height fluctuations. The observed
roughness and dynamical exponents can be explained by the numerical simulation
on the basis of forced Kuramoto-Sivashinsky equation.Comment: 6 pages (two columns), 11 eps. figures, late
Leiomyosarcomas of Vascular Origin in the Extremity
Between 1996 and 2006 a total of 278 patients with soft tissue
Leiomyosarcoma were treated at our centre. We identified 16
patients (5.8%) where the tumour directly arose from the blood
vessels. These tumours were studied to determine their prognosis
and behaviour. All tumors were in the lower limbs: 11 from the
femoral vein, 3 popliteal vein, and 2 from the posterior tibial
vein. Mean tumour size was 10.4 cm (3 to 33). Histological
grade was high in all patients. Surgical treatment was amputation
in one, excision with or without vascular reconstruction in 12
followed by radiotherapy, and 3 patients had no surgery because of
advanced disease at diagnosis. Seven out of the 16 patients
(44%) had metastasis at diagnosis, and five patients without
metastasis at diagnosis rapidly developed metastases at a median
time of 5 months from diagnosis (2–30 months). The overall
survival of the patients at 5 years was 25% which was
considerably worse than those with nonvascular leiomyosarcoma. We
conclude that patients with leiomyosarcoma of vascular origin have
a very high risk of metastases and poor prognosis when treated in
the conventional way
Structure Determination of Ba\u3csub\u3e8\u3c/sub\u3eCoRh\u3csub\u3e6\u3c/sub\u3eO\u3csub\u3e21\u3c/sub\u3e, a New Member of the 2H-Perovskite Related Oxides
Single crystals of Ba8CoRh6O21 were grown out of a potassium carbonate flux. The structure was solved by a general method using the superspace group approach. The superspace group employed was R3m(00γ)0s with a = 10.0431(1) Å, c1 = 2.5946(1) Å and c2 = 4.5405(1) Å, V = 226.60(1) Å3. Ba8CoRh6O21 represents the first example of an m = 5, n = 3 member of the A3n+3mA\u27nB3m+nO9m+6n family of 2H hexagonal perovskite related oxides and contains chains consisting of six consecutive RhO6 octahedra followed by one distorted CoO6 trigonal prism. These chains in turn are separated from each other by [Ba]∞ chains
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