Solutions to Exercise Sheet 5 (contd)
نویسنده
چکیده
The logical design aspects of the three exercises are presented below: Question 11 • (a) Tourist information system: Relational schemas: city(cityid, name, region) street(cityid, name) intersects(cityid, street1, street2) attraction(aid, name, city, street) park(aid) museum(aid) theatre(aid) The two main decisions involves how to represent the subclass hierarchy. My decision is based on the following considerations: – A tourist information system will definitely need to present various kinds of information about the attractions and the type of information to be stored will be specific to type of attractions. For instance, theatres might need shows, times and prices, whereas parks would not. So, I choose to represent the different attraction types as separate tables.
منابع مشابه
Serological Technique : Immunotherapy (Contd.). Immunization against Pollen, Foodstuffs, House Dust, Etc. (Contd.)
متن کامل
Analytical solution of MHD flow and heat transfer over a permeable nonlinearly stretching sheet in a porous medium filled by a nanofluid
In this paper, the differential transform method and Padé approximation (DTM-Padé) is applied to obtain the approximate analytical solutions of the MHD flow and heat transfer of a nanofluid over a nonlinearly stretching permeable sheet in porous. The similarity solution is used to reduce the governing system of partial differential equations to a set of nonlinear ordinary differential equations...
متن کاملShallow ice stream approximation
Introduction Conclusions References Tables Figures ◭ ◮ ◭ ◮ Back Close Full Screen / Esc Abstract Introduction Conclusions References Tables Figures ◭ ◮ ◭ ◮ Back Close Full Screen / Esc Printer-friendly Version Interactive Discussion EGU Abstract New analytical solutions describing the effects of small-amplitude perturbations in boundary data on flow in the shallow ice stream approximation are p...
متن کامل