Information Sciences, Volume 50

Volume 50, Number 1, February 1990

• Kazuo Nakamura:
  Canonical fuzzy numbers of dimension two and fuzzy utility difference for understanding preferential judgments. 1-22
  
• Azriel Rosenfeld:
  Pyramid algorithms for finding global structures in images. 23-34
  
• Ryszard Jakubowski:
  Decomposition of complex shapes for their structural recognition. 35-71
  
• P. P. Das, Biswanath N. Chatterji:
  Hyperspheres in digital geometry. 73-91
  
• Antonio di Nola, Salvatore Sessa, Witold Pedrycz:
  On some finite fuzzy relation equations. 93-109
  

Volume 50, Number 2, March 1990

• Liu Wang-Jin:
  Fuzzy prime ideals and fuzzy radical ideals. 111-122
  
• P. P. Das, Biswanath N. Chatterji:
  Octagonal distances for digital pictures. 123-150
  
• Alexis Koster:
  A functional programming-directed database machine. 151-183
  
• Liu Wang-Jin:
  On some systems of simultaneous equations in a completely distributive lattice. 185-196
  
• William Perrizo, Chun-Shwu Chen:
  Composite semijoins in distributed query processing. 197-218
  

Volume 50, Number 3, April 1990

• Frank Wm. Tompa, José I. Icaza:
  Adaptive selection of query execution strategies by learning automata. 219-240
  
• Ronald R. Yager:
  On the associations between variables in expert systems including default relations. 241-274
  
• Christian Ronse:
  Order-configuration functions: Mathematical characterizations and applications to digital signal and image processing. 275-327