  | 
                                                    
                                                        
                                                         
                                                          
            
              
                | Editors | 
               
              
                |   | 
                  | 
               
              
                Sung-Chi Chu, PhD 
      Dept of Decision Sciences & Managerial Economics 
      The Chinese University of Hong Kong  
      Shatin, N.T.  
      Hong Kong 
                 | 
                   | 
               
              
                |   | 
                  | 
               
              
                Wei-Chi Yang, PhD  
      Department of Mathematics & Statistics  
      Radford University  
      Radford VA 24142  
      U.S.A. | 
                  | 
               
              
                |   | 
                  | 
               
              
                Tilak de Alwis, PhD 
      Kenelly-Voss Endowed Professor 
      Department of Mathematics 
      Southeastern Louisiana University 
      U.S.A. 
                 | 
                  | 
               
              
                |   | 
                  | 
               
              
                Keng-Cheng Ang, PhD 
      Mathematics and Mathemactics Education 
      Nanyang Technological University 
      Singapore | 
                  | 
               
              
                |    | 
                 
                 | 
               
             
              
           | 
                                                         
                                                        | 
                                                     |