Suchergebnisse

Several illustrative studies on the mathematical modeling and analysis of the Coronavirus have been carried out in a short period of time. There is not enough work that accounts for the vaccination campaign's two stages. In this work, a mathematical model is created to show the impact of the recent two-stage vaccination treatment on the Coronavirus. In the proposed model, five compartments are constructed, namely the susceptible individuals , the first dose of vaccination , the second dose of vaccination , infected and recovered population . The uniqueness, boundedness and existence of the solutions of this model have been discussed. All potential model equilibrium points are determined. The local as well as global stability of the system in terms of the basic reproduction number is investigated. Numerical simulation is also carried out to investigate the influence of parameters affecting the dynamics of the model and to support the gathered analytical findings of the model.

A general treatment function with an epidemic model that involves the delay in the treatment period has been proposed and studied in this work. This model contains two compartments, namely susceptible denoted by and infected denoted by . The existence of all the fixed points has been determined. The system has two equilibrium points, namely the uninfected equilibrium point (UIEP) and the endemic equilibrium point (EEP). The conditions for local stability and Hopf bifurcation have been discussed. The stability of the periodic solutions and the direction of the Hopf bifurcation properties have been studied analytically and numerically.

The purpose of this study is to examine the relationship between individuals' experiences of the Iran–Iraq war (1980–1988) during early adulthood (18–25 years) and their preference for strong national defense forces and their willingness to fight for Iran (in the event of another war). Using the World Values Survey data, we provide evidence that Iranians who experienced the war during their early adulthood give top priority to strong defense forces. However, we find that there is no significant association between individuals' experiences of the war during early adulthood and their willingness to fight for Iran. The results are robust to controlling for a set of individuals' socioeconomic and political characteristics as well as different age cohorts. Finally, we show that our results are not influenced by age cohort effect.

In recent years, real estate has become a very popular investment choice for Iranian investors due to several interrelated economic and political reasons. The purpose of this study is to find out how real estate investors can gain diversification benefits from investing within the real estate sector across provinces of Iran. We use semi-annual data from selected provinces of Iran over the period of 1993–2014 and apply univariate Lagrange multiplier unit root tests with one and two structural breaks to the ratio of the provincial to national house and residential land prices respectively. We find diversification benefit can be gained by investing in housing markets across provinces because house prices in half of the sample provinces tend to drift away from house prices in the rest of the country. In addition, our results show that it is difficult to create an adequately diversified portfolio in a residential land market because shocks to the residential land prices of provinces ripple out across the nation. These findings should be valuable to domestic and foreign investors who are interested in the Iranian real estate sector, especially after the lifting of several international economic sanctions.

Half Title Page -- The RISJ -- Title Page -- Copyright Page -- Dedication -- Epigraph -- Contents -- Foreword -- Prologue to Revolution -- Eighteen Days -- Politics and the Press under Military Rule -- Revolutionaries versus the Generals -- Fall of Military Rule and the Islamists -- An Overthrow, a Revitalised Police State, and the Military Presidency -- Epilogue: Media Matters -- Timeline -- Notes -- RISJ/I.B.Tauris Publications

In this study, we use a more accurate and comprehensive indicator of financial development to examine the link between financial development and tourist arrivals and expenditures in the top 20 tourist destination countries over the period of 1995–2017. By applying the panel augmented mean group method and controlling for other determinants of tourist arrivals, the overall results revealed that financial development positively influences tourism development. On the contrary, economic growth and countries price levels have no significant effects on tourism development. At the country level results; financial development has positive effects on tourism development in most countries. However, gross domestic product growth and consumer price index have a significant in few countries only. Therefore, the outcome of this study reveals that that visitors do not consider the development and the price level of the country but rather the facilities available including the facilities in the financial structures.

Sixty nine per cent of people with hemophilia symptoms in rural areas were accessed to laboratory diagnosis and care support in Sudan, where technical expertise and health care facilities was less than optimal. There were many reasons for the inadequate care of hemophilic patients: the perception of rarity of the disease; lacked of laboratory facilities to diagnose the disorder; lacked of understanding of the disorder by patients, their relatives, and even healthcare providers; poorly developed blood bank facilities; and lacked of adequate factor supply were just some examples. The Sudanese Hemophilia Care Association (SHCA) was attempted to address many of these issues by establishing hemophilia care programs and by educating and training healthcare practitioners so that a healthcare team could be organized that attempts to ameliorate these problems and provides treatment options. However, it was possible to manage hemophiliac's patients with limited resources. Strategies for conserving factor concentrates were included education of doctors and patients, prenatal diagnosis, increasing the use of anti fibrinolytic agents, physiotherapy, the use of fibrin glue, and simple orthotics and prosthetic measures. An outreach program would be initiated to ensure that hemophilia care and diagnosis was available outside the capital city. Official recognition of hemophilia laboratory diagnosis and treatment centers and designated centers by the government could also be very beneficial in ensuring adequate care in rural areas in Sudan.