Energy-level crossings and number-parity effects in a bosonic tunneling model

An exactly solved bosonic tunneling model is studied along a line of the coupling parameter space, which includes a quantum phase boundary line. The entire energy spectrum is computed analytically, and found to exhibit multiple energy level crossings in a region of the coupling parameter space. Several key properties of the model are discussed, which exhibit a clear dependence on whether the particle number is even or odd.Comment: 12 pages, 7 figure

Predicting Performance through the Elements of Organizational Culture

Organizational culture is shaped by the leaders and by the purpose for which the organization exist. There are many cultures and subHcultures, which may be of different strengths and which may have different levels of influence. The main aim of this paper was to determine what elements of organizational culture predict the performance of an organization. The objectives of the study were to determine if the different elements of organizational culture has significant contribution on the performances of Universities and to reveal which of the different elements of organizational culture has the most significant contribution in predicting the performances of Universities. To determine what elements of organizational culture predict the performance of an organization, a sample of 100 staff (academic and nonHacademic)each of Covenant University, Ota, Olabisi Onabanjo University, AgoHIwoye, University of Agriculture, Abeokuta, all in Ogun State were drawn. Data was collected with the use of a Likert type questionnaire and were analyzed using multiple regressions with the aid of Statistical Package for Social Sciences (SPSS). The finding shows that Quality Consciousness, Role Clarity, Employee Concern, Customer Care and Code of Conduct made the most significant contribution in predicting performances of organizations. Conclusively, there is no such thing as a ‘right’ or ‘best’ culture for all organizations. The most appropriate culture for an organization is the one that best helps it cope with the exigencies of its business environment. The most appropriate culture for an organization is the one that best helps it cope with the exigencies of its business environment

Organizational Culture: Creating, Changing, Measuring and Consolidating for Performance

The Culture of an organization starts with the leadership of the organization. The culture of an organization is seen as a DNA that is not visible to the eye, but a very powerful tool that shapes what happens in an organization. Therefore, organizational culture is the personality of the organization. The main thrust of this paper examines how an organization can create, change and strengthen culture as it affects her performance. Furthermore, it examines how organizational culture dynamically creates structures and frameworks for the operations of an organization. This paper further suggests that it is central to comprehend the environmental setting of an organization in order to delineate the cultural standards, values and beliefs to implement. Employees with beliefs and values that are compatible with the organizations’ culture must be recruited from the inception of an organization operation and throughout her life span. Organizations must inspire socialization and incorporation of individual employees’ goals with the organizations’ goals and objectives to sustain her culture. An organization’s Management should implement the development of interconnecting culture through the use of unambiguous statements of single-mindedness, core values and cultural standards. Actively, top management should appraise various cultural elements, as this will help to manage and take necessary actions in strengthening culture

Mechanisms for Controlling Sand-Induced Corrosion in Horizontal Pipe Flow of Sand, Crude Oil and Water

Background: The presence of sand particles and associated water in crude oil calls for serious concern when the flow conditions leading to flow stratification in an upstream petroleum pipeline become significant. At such conditions, problems such as sand deposition and water containment on the pipe wall may result in consequences such as sand-induced corrosion, mechanical failure, pipe fatigue, reduced flow area, loss of production and pipe blockage which are still currently unresolved by conventional and current models. Objective: A modelling approach was adopted to control the conditions leading to sand-induced corrosion and other related problems caused by flow stratification in the upstream petroleum sector since conventional methods adopted to screen sand, only contribute to the problem. Also, to date, mechanisms and models exist for other corrosion types such as CO2, H2S, acid-induced corrosion, etc. but none currently exists for sand-induced corrosion. However, the concept of force-competition or dimensionless numbers was adopted using a modelling approach to resolve the problem. Method: This research work resolves the situation by means of a three-phase model which incorporates sand, crude oil and water phases in its mass and momentum balance equations while taking into cognisance, the effect of eddies. The three-layer model established in this work, has its origin in a two-phase sand-crude oil system and, based on current literature, a modelling approach that considers the flow of sand, crude oil and water has never been adopted to tackle the problem of sand-induced corrosion caused by associated water as a stimulant for corrosion. Conclusion: The established model gave an accuracy of 99% when results from the model were compared with sand and crude oil production data obtained from the field. Based on the model’s reliability, flow mechanisms/dimensionless numbers were used to ascertain critical flow conditions in order to be able to avoid situations leading to sand deposition, sand-induced corrosion and other related problems. Based on the results obtained, the estimated Euler numbers revealed that the 18 m point of the pipe is at risk due to the impact of the sand-deposit-drag-force on the pipe wall. Also, the estimated Froude numbers were indicative of the 12-18 m points as deposit/corrosion prone areas

Employees’ Attitudes towards Organizational Change and Its Effects on Employee Commitment

Organizations are expected to enhance their capacity to ensure employees are provided with the necessary support for the acceptance for change initiatives. Review of relevant literature reveals that high extents of organizational activities towards acceptance of change are unsuccessful as studies have generally agreed that employee resistance is one of the leading causes for the failure of change initiatives (Bovey and Hede, 2001; Beer and Nohria, 2000). In studies that have inspected the conditions in which workers support authoritative change, specialists have concentrated on different attitudinal factors that represents employees’ states of mind toward hierarchical change. These factors include preparation for change, responsibility to change, openness to change, and pessimism about authoritative change. These factors have distinct meaning and implications for the organization and thus serve as representative assessment of employees’ evaluation and worries about specific change activities. This study examines the attitudes of employees towards organizational change through review of relevant literature and discusses how attitudinal factors relate to organizational change, the inherent antecedents of each factor and its influence on employee commitment. Based on the discussion, possible recommendations will be made for industry practitioners and policy makers

The Schrodinger equation with Hulthen potential plus ring-shaped potential

We present the solutions of the Schr$\ddot{o}$dinger equation with the Hulth$\acute{e}$n potential plus ring-shape potential for $\ell\neq 0$ states within the framework of an exponential approximation of the centrifugal potential.Solutions to the corresponding angular and radial equations are obtained in terms of special functions using the conventional Nikiforov-Uvarov method. The normalization constant for the Hulth$\acute{e}$n potential is also computed.Comment: Typed with LateX,12 Pages, Typos correcte