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A simulation study of library-based information retrieval systems is described. Basic models for each of several important aspects are presented: (1) user behavior, emphasizing response to quality and delays in services; (2) the scheduling of services and the organization of the machine-readable files; and (3) the distribution of conventional library materials. Many of the variables in the model (e.g., user expectations of service time, delays involved in providing services, etc.) are random. An adaptive element is present in the form of admitting changes in user expectations in response to system changes. The need for frequent model change and the merging of component models into a comprehensive model for the entire system is established as the basis for use of a user-oriented simulation language. Statistical facility beyond that supplied in the language used (GPSS/360) is required to achieve the goals of this and related investigations. (Author)

1Boy Crusoe

By Allan Eric

Also published as" A Yankee Crusoe" . A 15 year old hard working and studious farm boy finds the lure of adventure on the seas as a merchant seaman more than he can resist. This is his story. " I was born in a little town in the State of Maine, near the close of the Civil War. My boyhood life did not differ materially from that of the average farmer's son in the remote country districts of New England--except, perhaps, that I read more and thought more. Hard work on the rugged soil, two terms each year in the little yellow country schoolhouse, a day's fishing now and then filled the early years of my life full to over-flowing. " What he gets is enough excitement and adventure to overflow his wildest dreams. How he experiences disaster and uses his wits and knowledge to overcome every problem makes for a great read. - Summary by Phil Chenevert