Oscillation and nonoscillation of functional differential equations

A qualitative approach is usually concerned with the behavior of solutions of a given differential equation and usually does not seek specific explicit solutions;This dissertation is the analysis of nonoscillation of even order delay differential equations, and the oscillation of solutions of arbitrary order functional differential equations. This is done mainly in Chapters II and III. Chapter IV deals with the oscillation and nonoscillation of bounded solutions of n-th order delay differential equations. By an oscillatory solution we mean that the solution has infinitely many zeros; otherwise, it is called nonoscillatory solution;The functional differential equations under consideration are:(UNFORMATTED TABLE OR EQUATION FOLLOWS)≤ (A) [r(t)y[superscript]\u27(t)][superscript](2n-1) + [sigma][subscript]spi=1k P[subscript]i(t) F[subscript]i[y[subscript][tau](t),y[subscript]sp[sigma][subscript]1\u27(t),...,y[subscript]sp[sigma][subscript]2n-1(2n-1)&(t)] & = f(t), n ≥ 1& x[superscript](n)(t) + [sigma] [sigma][subscript]spi=1m P[subscript]i(t) x[g[subscript]i(t)] + [delta] q(t) x[h(t)]& = f(t), n ≥ 3& (B) L[subscript]n x(t) + (-1)[superscript]n-1 [sigma][subscript]spi=1m a[subscript]i(t)f[x(g[subscript]i(t)]& = b(t), n ≥ 1& (C) (TABLE/EQUATION ENDS);Equation (A) is considered in Chapter II, where we find sufficient conditions for which all solutions of equation (A) are nonnegative. Equation (B) is studied in Chapter III for the cases: [delta] = 0, [sigma] = 0 and [sigma] = [delta] = ±1 i.e., delay arguments, advanced arguments, and mixed type arguments, respectively. Finally, equation (C) is studied in Chapter IV. Sufficient conditions are found to force all bounded solutions to be oscillatory, and sufficient conditions are also found for which every bounded solution of equation (C) tends to zero as t → [infinity]

Bayesian Phase Search for Probabilistic Amplitude Shaping

We introduce a Bayesian carrier phase recovery (CPR) algorithm which is robust against low signal-to-noise ratio scenarios. It is therefore effective for phase recovery for probabilistic amplitude shaping (PAS). Results validate that the new algorithm overcomes the degradation experienced by blind phase-search CPR for PAS.Comment: 4 pages, 2 figures. Submitted to the 49th European Conference on Optical Communication

Innovation Process is Facilitated in Virtual Environment of R&D Teams

Innovation is becoming the most important key issue for company's success in the 21st century. In the competitive environment it is necessary for the enterprises to put together different capabilities and services with the goal. It is widely accepted that innovation can be better achieved by working in team particularly in the virtual environments. The employed web services technology, although very popular nowadays but it is still not mature enough, so dealing with it can bring new findings. Virtual teams base on information technology are formed to facilitate transnational innovation processes and it should be noted that innovation has a positive impact on corporate performance if it is well guided. This has the pronounced effect when it comes to the learning issues as the virtual preconditions persist. In this environment the possibility of getting closer to the interest of learner from the new environment raise as the barriers being imposed by the service provider is reduced and the freedom of what is require to learn is improved. Information and communication technology has brought about significant changes in organizations and produced important benefits, including in the areas of innovation which is recognized as a prime source of national competitive advantage. This contribution proposes a conceptual model for understanding and analyzing the process of virtual R&D team as an innovation and technology assimilation facilitator when it comes to the issue of conveying innovative message for learning by individuals. The context of the knowledge-based economy introduces a major shift from serial to simultaneous R&D in the way of idea conception to technology creation is conceived. This paper briefly reviews the existing perspectives on virtual teams and their effect on innovation and technology regarding the learning capability which is being altered. It also discusses the main characteristics of virtual teams and clarifies the different aspects of virtual team application in the topic. To support the theoretical analysis, this paper provides a comprehensive review based on authentic and reputed publications. We argue that scanty research has been conducted to facilitate understanding the problem of systematically governing creative innovation toward a technology through virtual R&D teams in the atmosphere of educating individuals based on what they interest them to learn.Virtual team; e-learning; Innovation; Research and development, Learning

Demographic Variable (Age, Gender, Marital Status, and Educational Qualifications, in Come ) and Afeecte in Nurses’ Performance in Hebron Hospitals

Background: Nurses spend more time with patients than other health care providers, and patient outcomes are affected by nursing care quality. Aim of the Study: The purpose of this study was to investigate the  level of nursing performance  and the factors affect of nursing performance in Hebron hospitals. The study  used a quantitative descriptive design and stratified random sampling approach to select 181 nurses working in Hebron district Hospitals in the West Bank. The data was collected through questionnaire which consisted demographic variable, and 15 statements . The total number of responders was 181 nurses distributed among five hospitals in Hebron government and non government hospitals in the West Bank. The governmental hospitals included: Alia Hospital, 65 nurses and Abu Al-Hassan hospital18 nurses; while the non-governmental hospitals included: Al Ahli Hospital 60 nurses, Al-Mizan hospital 20 nurses, and Red Crescent hospital 18 nurses. Results: The majority of the responders were young with age less than 39 years old, with less than ten years of experience, and 60% of them had a bachelor degree or more. 31.5% from nurses the income less than 2500 NS, 38.7% the income between 2500 – 3499 NS, 29.8 from nurses the income between More than 3500 NS. Nursing performance in hebron hospital is high 71%. However, there was no significant correlation between gender, academic degree, experience or qualification of participants and nurses’ performance with α ≤ 0.05. the study recommended more study in nursing performance in other factors

Security threats of finger print biometric in network system environment

Biometrics-based personal authentication systems that use physiological (e.g., fingerprint, face) or behavioral (e.g., speech, handwriting) traits are becoming increasingly popular, compared to traditional systems that are based on tokens (e.g., key) or knowledge (e.g., password). On the other hand, biometric systems are vulnerable to attacks, which can decrease their security. This paper analyzes and surveys the vulnerabilities and security threats of the finger print biometric systems used for access control and the authentication of access to confidential information in network system environment. As analysis tools, two biometric network models are implemented and connected to see some of the arguments of the vulnerabilities and security threats. Based on that, analysis and surveying, experimental solutions and countermeasures are presented