Walid Hamdan - Academia.edu (original) (raw)
Papers by Walid Hamdan
University of California Press eBooks, Dec 31, 2019
Rendiconti del Seminario Matematico della Università di Padova, 1993
The aim of this paper is to consider the structure and other properties of some of the triangle g... more The aim of this paper is to consider the structure and other properties of some of the triangle groups 4(L, m, n) for positive integers l,m,n > 2. The triangle group J(l, m, n) is defined by the presentation It is the group of tesselation of a space with a triangle [7]. The group m, n) is finite iff the corresponding space is compact. This implies that IJ(l, m, n) I 00 iff + + > 1. [7]. We get the following three cases for J(l, m, n). 1) The Euclidean case if + + = 1. This equation has the solution (3, 3, 3), (2, 3, 6) and (2, 4, 4). 2) The elliptic case if + 1/m + 1/n > 1. This inequality has the following solutions (2, 2, n), (2, 3, 3), (2, 3, 4), (2, 3, 5) for n > 2. 3) The hyperbolic case if + + 1. This inequality has an infinite number of solutions. REMARK 1. J(1, m, n) = m, n) = J(m, l, n). The group m, n) depends only on the absolute values of l, m, n and not on their order or sign. THEOREM 1. The group A(l, m, n) is finite iff 1/1 + 1/m + 1/n > 1. PR...
Land of Blue Helmets, 2017
This chapter examines the role of the International Labor Organization (ILO) in addressing worker... more This chapter examines the role of the International Labor Organization (ILO) in addressing workers' rights in the Arab region. Founded in 1919, ILO is the United Nations specialized agency that seeks the promotion of social justice and internationally recognized human and labor rights. It stands out within the UN system by having a tripartite structure representing the voice and interests not only of governments but also of workers' organizations and employers' organizations. This chapter first provides an overview of ILO's work and interventions in the Arab states since 2010 before assessing the extent to which the organization was able to reflect its principles and conventions through its interventions in the Arab region. It also discusses ILO's approach by considering its response to the Arab uprisings as well as its competition with other international organizations for donor funds to increase its portfolio. The chapter concludes with suggestions for improvin...
Geological Society, London, Special Publications, 2010
... Fig. 1. Generalized geological map of Lebanon (Dubertret 1955) simplified (Walley 1998) with ... more ... Fig. 1. Generalized geological map of Lebanon (Dubertret 1955) simplified (Walley 1998) with indication of areas of main sampling (BQF, Beit ed DineQabb Elias Fault). Fig. 2. View larger version ...
International Journal of Rheumatic Diseases, 2011
Aim: To estimate the prevalence of rheumatic diseases in Lebanon and to explore their distributio... more Aim: To estimate the prevalence of rheumatic diseases in Lebanon and to explore their distribution by geographic location, age, and gender. Method: Using the Community Oriented Program for the Control of Rheumatic Diseases (COPCORD) methodology, a random sample of 3530 individuals aged 15 and above was interviewed from the six Lebanese governorates. Positive respondents were evaluated by rheumatologists using the internationally accepted classification criterion of the American College of Rheumatology for the diagnosis of rheumatic diseases. Results: Prevalence rates of current and past musculoskeletal problems were 24.4% and 8.4%, respectively. Shoulder (14.3%), knee (14.2%) and back (13.6%) were the most common pain sites. Point prevalence of rheumatic diseases was 15.0%. The most frequent types of rheumatic diseases were of mechanical origin, namely soft tissue rheumatism (5.8%) and osteoarthritis (4.0%). Rheumatoid arthritis (1.0%) and spondylathropathies (0.3%) constituted the most common inflammatory diseases. Coastal areas had the lowest prevalence of all diseases except for fibromyalgia. All diseases showed an increasing prevalence pattern with age and a higher prevalence among women than men. Conclusion: This is the first study to give population-based estimates of rheumatic diseases in Lebanon. The high burden calls for public health attention for early detection, control and prevention of these conditions. Point prevalence of individual diseases was within the range of results from other COPCORD surveys with some variations that can be attributed to differences in methodology and geo-ethnic factors.
University of California Press eBooks, Dec 31, 2019
Rendiconti del Seminario Matematico della Università di Padova, 1993
The aim of this paper is to consider the structure and other properties of some of the triangle g... more The aim of this paper is to consider the structure and other properties of some of the triangle groups 4(L, m, n) for positive integers l,m,n > 2. The triangle group J(l, m, n) is defined by the presentation It is the group of tesselation of a space with a triangle [7]. The group m, n) is finite iff the corresponding space is compact. This implies that IJ(l, m, n) I 00 iff + + > 1. [7]. We get the following three cases for J(l, m, n). 1) The Euclidean case if + + = 1. This equation has the solution (3, 3, 3), (2, 3, 6) and (2, 4, 4). 2) The elliptic case if + 1/m + 1/n > 1. This inequality has the following solutions (2, 2, n), (2, 3, 3), (2, 3, 4), (2, 3, 5) for n > 2. 3) The hyperbolic case if + + 1. This inequality has an infinite number of solutions. REMARK 1. J(1, m, n) = m, n) = J(m, l, n). The group m, n) depends only on the absolute values of l, m, n and not on their order or sign. THEOREM 1. The group A(l, m, n) is finite iff 1/1 + 1/m + 1/n > 1. PR...
Land of Blue Helmets, 2017
This chapter examines the role of the International Labor Organization (ILO) in addressing worker... more This chapter examines the role of the International Labor Organization (ILO) in addressing workers' rights in the Arab region. Founded in 1919, ILO is the United Nations specialized agency that seeks the promotion of social justice and internationally recognized human and labor rights. It stands out within the UN system by having a tripartite structure representing the voice and interests not only of governments but also of workers' organizations and employers' organizations. This chapter first provides an overview of ILO's work and interventions in the Arab states since 2010 before assessing the extent to which the organization was able to reflect its principles and conventions through its interventions in the Arab region. It also discusses ILO's approach by considering its response to the Arab uprisings as well as its competition with other international organizations for donor funds to increase its portfolio. The chapter concludes with suggestions for improvin...
Geological Society, London, Special Publications, 2010
... Fig. 1. Generalized geological map of Lebanon (Dubertret 1955) simplified (Walley 1998) with ... more ... Fig. 1. Generalized geological map of Lebanon (Dubertret 1955) simplified (Walley 1998) with indication of areas of main sampling (BQF, Beit ed DineQabb Elias Fault). Fig. 2. View larger version ...
International Journal of Rheumatic Diseases, 2011
Aim: To estimate the prevalence of rheumatic diseases in Lebanon and to explore their distributio... more Aim: To estimate the prevalence of rheumatic diseases in Lebanon and to explore their distribution by geographic location, age, and gender. Method: Using the Community Oriented Program for the Control of Rheumatic Diseases (COPCORD) methodology, a random sample of 3530 individuals aged 15 and above was interviewed from the six Lebanese governorates. Positive respondents were evaluated by rheumatologists using the internationally accepted classification criterion of the American College of Rheumatology for the diagnosis of rheumatic diseases. Results: Prevalence rates of current and past musculoskeletal problems were 24.4% and 8.4%, respectively. Shoulder (14.3%), knee (14.2%) and back (13.6%) were the most common pain sites. Point prevalence of rheumatic diseases was 15.0%. The most frequent types of rheumatic diseases were of mechanical origin, namely soft tissue rheumatism (5.8%) and osteoarthritis (4.0%). Rheumatoid arthritis (1.0%) and spondylathropathies (0.3%) constituted the most common inflammatory diseases. Coastal areas had the lowest prevalence of all diseases except for fibromyalgia. All diseases showed an increasing prevalence pattern with age and a higher prevalence among women than men. Conclusion: This is the first study to give population-based estimates of rheumatic diseases in Lebanon. The high burden calls for public health attention for early detection, control and prevention of these conditions. Point prevalence of individual diseases was within the range of results from other COPCORD surveys with some variations that can be attributed to differences in methodology and geo-ethnic factors.