Stability of the pentaquark in a naive string model

The pentaquark is studied in a simple model of confinement where the quarks and the antiquark are linked by flux tubes of minimal cumulated length, and the Coulomb-like interaction, the spin-dependent terms and the antisymmetrization constraints are neglected.. The ground-state is found to be stable against spontaneous dissociation into a meson and a baryon, both in the case of five equal-mass constituents and for a static quark or antiquark surrounded by four equal masses.Comment: 8 pages, 2 figures, minor corrections, references added, to appear in Phys. Rev.

An Invariant Dual-beam Snowflake Antenna for Future 5G Communications

A broadband snowflake antenna for future 5G and millimeter-wave communications is presented. The proposed antenna has a size of 8 × 5 mm 2 . The antenna consists of a central hexagon surrounded by a series of symmetrically placed smaller hexagons around it, resulting in broadband characteristics. The impedance bandwidth of the proposed antenna ranges from 25.284-29.252 GHz. The antenna has a gain of 3.12 dBi at 28 GHz and is more than 98% efficient. A distinct feature of the proposed antenna is its dual-beam radiation pattern. The two beams remain fixed at ±50° even if the frequency is varied with in its operating band. The proposed antenna is modelled on thin Rogers substrate which makes it very useful for future 5G smart phones

The Study of annual shrimp stocks in Masshab (Al-Hammar Marsh), Basrah, Southern Iraq

The catch was identified and included two species of shrimp in the waters of the Masshab near Al – Hammar Marsh, Basra, Iraq. During the study period, some of the following environmental factors were recorded, Temperatures are between 20 to 30 ° C; Salinity (‰) between 1.5 to 4.9; The pH value is between 6.9 to 8.0; Turbidity (NTU) between 18.4 to 21.5. The total catch from shrimp, Metapenaeus affinis, and Macrobrachium nipponense was 373,35 ± 12.03 per hour per year, and the monthly catch rate for shrimp was 33.11 ± 12.03 kg per hour per month. The peak of fishing during the summer months was the highest in July, with fishing reaching 47.200 kg per hour during July, while the lowest quantities of fishing were in winter during the January month at 12 kg per hour. The overall catch rate for M. affinis was 124 ± 10.58 kg per hour per year, while the total catch rate for M. nipponense was 241± 13.33 kg per hour per year. The female sex ratio was higher than that of males in two species, M. affinis of males was 21.67, and females were 78.33, while in M. nipponense males were 14.6 to 83.25. And female of M. nipponense bearing of eggs 28.62 ± 34,21 during the year. While non-eggs carriers 71.38 ± 34.21. The period in which females were observed carrying-eggs was determined during the summer months from April to July. The highest  percentage of egg-carrying was in July at 88.40% and at January, 11.6%. The longest. M. affinis was 10 cm and the smallest was1 cm, the longest, while M. nipponense and 9 cm and the smallest was 1 cm

The Impact of a Sustainable Muslim Model on Community Development with Special Reference to Religious Tourism

This paper uses the descriptive qualitative approach to answer questions about how a Sustainable Muslim Model (SMM) could work as a new approach to developing and sustaining communities. This study embraces the textual analysis method to examine the prevailing published research in the context of sustainability and community development. A number of scholars have approved this textual analysis method as a tool to study religious texts. The purpose of this paper is to give an overview and discuss the status, issues and challenge of community development in tourism. As religious tourism is gaining more ground over time, the need to develop religious tourism sustainably and thus protect tourism communities, has become a priority. Developing and sustaining religious tourism almost always becomes a primary interest and priority for concerned communities. The religious virtues which form the cultural values of Muslim communities affect this crucial issue as they dovetail with the affective domain of sustainability awareness. This study explores the Qur’anic verses and Islamic teachings which urge Muslims to design and build communities in general and religious tourist sites in particular in a highly sustainable way. The results of this study indicate that the SMM can be applicable to Muslim and non-Muslim communities in maintaining sustainability while developing tourism communities. The role of Islamic religious tourism in developing environmental, cultural and economic sustainability is highlighted in a variety of Islamic teachings. The study finds that the appropriateness of the aforementioned teachings are highly relevant to current sustainability issues. This study presents for the first time the Sustainable Muslim Model (SMM) as new approach to deal with community development. The discussion presents a wealth of original research and source material, it illuminates and clarifies the concept of Khairyyah (goodliness / charitable), which, the literature argues, is central to an understanding of how sustainable tourism development can be implemented from an Islamic point of view

Modelling framework to support decision-making in manufacturing enterprises

Systematic model-driven decision-making is crucial to design, engineer, and transform manufacturing enterprises (MEs). Choosing and applying the best philosophies and techniques is challenging as most MEs deploy complex and unique configurations of process-resource systems and seek economies of scope and scale in respect of changing and distinctive product flows. This paper presents a novel systematic enhanced integrated modelling framework to facilitate transformation of MEs, which is centred on CIMOSA. Application of the new framework in an automotive industrial case study is also presented. The following new contributions to knowledge are made: (1) an innovative structured framework that can support various decisions in design, optimisation, and control to reconfigure MEs; (2) an enriched and generic process modelling approach with capability to represent both static and dynamic aspects of MEs; and (3) an automotive industrial case application showing benefits in terms of reduced lead time and cost with improved responsiveness of process-resource system with a special focus on PPC. It is anticipated that the new framework is not limited to only automotive industry but has a wider scope of application. Therefore, it would be interesting to extend its testing with different configurations and decision-making levels

N-[(E)-3,4-Dimeth­oxy­benzyl­idene]-2,3-dimethyl­aniline

In the title compound, C17H19NO2, the aromatic rings are oriented at a dihedral angle of 59.27 (12)°. In the crystal, inversion dimers linked by pairs of weak C—H⋯O inter­actions generate R 2 2(12) loops

Consumption of Zamzam Water as a Natural Health Medicine for Visitors Attending Pilgrimage in Makkah

The Zam Zam is the name of the well in city of Makkah that provides water to visitors who are attending pilgrimage. Over the last 4500 years billions of people have drunk water from the well of Zam Zam. During the annual Hajj festival pilgrims drink and wash themselves with the Zam Zam. The Quraan has stated in verse 21:30 ‘and we have made of water everything living, will they not then believe’. It is because of its religious character that Zamzam has a unique identification: the most sacred and miraculous water well in the history of Islam if not the entire world. It is believed that this water has healing properties and it is drunk by Muslims across the world

Do Conditional and Unconditional Conservatism Impact Earnings Quality and Stock Prices in Egypt?

The purpose of this paper is to examine the impact of conditional and unconditional conservatism on earnings' quality and stock prices in Egyptian context and provide further insights on the effects of earnings' quality on stock prices. This paper follows the asymmetric timeliness of earnings measure of Basu (1997) with further extension to measure the effect of conditional and unconditional on the quality of earnings and stock prices. This study employs cross sectional data analysis and multiple regression using data available for a sample of the largest 30 Egyptian listed firms during the period of 2005 to 2009. The results suggest that (i) conditional conservatism negatively affects both earnings quality and stock prices of Egyptian firms, and (ii) unconditional conservatism does not affect earnings quality but has a negative association with stock prices of Egyptian firms. The findings of this study would help Egyptian accounting standards setters to recommend accounting choices and policies that lead to high quality of earnings and provide financial reports that rationalize investors' decisions. This study is the first to test the impact of both conditional and unconditional conservatism on earnings' quality and stock prices in Egyptian setting. Keywords: Conservatism, conditional conservatism, unconditional conservatism, Earnings' quality, stock prices, Basu model, listed firms, Egyptian Stock Market, Egyp

Empyema Thoracis

Epmyema thoracis is associated with high mortality ranging between 6% to 24%. The incidence of empyema is increasing in both children and adults; the cause of this surge is unknown. Most cases of empyema complicate community- or hospital-acquired pneumonia but a proportion results from iatrogenic causes or develops without pneumonia. Parapneumonic effusions (PPE) develop in about one half of the patients hospitalized with pneumonia and their presence cause a four-fold increase in mortality. Three stages in the natural course of empyema have long been described: the exudative, fibrinopurulent, and organizing phases. Clinically, PPE are classified as simple PPE, complicated PPE, and frank empyema. Simple PPE are transudates with a pH > 7.20 whereas complicated PPE are exudates with glucose level <2.2 mmol/l and pH < 7.20. Two guidelines statements on the management of PPE in adults have been published by the American College of Chest Physicians (ACCP) and the British Thoracic Society (BTS). Although they differ in their approach on how to manage PPE, they agree on drainage of the pleural space in complicated PPE and frank empyema. They also recommend the use of intrapleural fibrinolysis and surgical intervention in those who do not show improvement, but the level of evidence for the use of intrapleural fibrinolysis is not high highlighting the need for more research in this area. A recently published large randomized trial has shown no survival advantage with the use of intrapleural streptokinase in patients with pleural infection. However, streptokinase enhances drainage of infected pleural fluid and may still be used in patients with large collection of infected pleural fluid causing breathlessness or ventilatory failure. There is emerging evidence that the combination of intrapleural tPA/DNase is significantly superior to tPA or DNase alone, or placebo in improving pleural fluid drainage in patients with pleural space infection. A guideline statement on the management of PPE in children has been published by the BTS. It recommends the use of antibiotics in all patients with PPE in addition to either video-assisted thoracoscopic surgery (VATS) or tube thoracostomy and intrapleural fibrinolysis. Prospective randomized trials have shown that intrapleural fibrinolysis is as effective as VATS for the treatment of childhood empyema and is a more economic treatment and therefore, should be the primary treatment of choice

Integrated modelling approach in support of change-capable PPC strategy realisation

The increasing demand for customization, reduced time to market and globalization are the real challenges for today’s manufacturing enterprises (MEs). Therefore MEs can reduce these competitive pressures by becoming more and more change-capable. The agile and lean manufacturing philosophies must complement the application of reconfiguration techniques. However, choosing and applying the best philosophies and techniques are far from being well understood and well structured processes because most MEs deploy complex and unique configurations of processes and resource systems, and seek economies of scope and scale in respect of a number of distinctive product flows. It follows that systematic methods of achieving model driven reconfiguration and interoperation of component based manufacturing systems are required to design, engineer and change next generation MEs. This paper discusses research aimed at developing and prototyping a model-driven environment for the design, optimization and control of enterprises with an embedded capability to handle various types of change in an example of a production planning and control (PPC) scenario. The developed environment supports the engineering of common types of strategic, tactical and operational process found in many MEs. Also reported are initial findings of manufacturing case study work in which coherent multi-perspective models of a specific ME have facilitated process reengineering and associated resource system configuration and interoperation. In order to understand the system prior to realisation of any PPC strategy, multiple process segments of organisations need to be modelled. The paper considers key PPC strategies and describes a novel systematic approach to create coherent sets of unified models that facilitate the engineering of PPC strategies. Case study models are presented with capability to enable PPC decision making processes in support of complex organisation design and change (OD&C). The paper outlines key areas for future research including the need for research into unified modelling approaches and interoperation of partial models in support of complex OD&C