Information processing apparatus, information processing method, and computer-readable medium for setting a retrieval target

An information processing apparatus comprising:

• a memory that stores pieces of information;
• and
• at least one processor;
• wherein the at least one processor calculates a retrieval target level for each one of a plurality of information groups, each one of the information groups being a set of plural pieces of information, using at least one of an output of a first function at a present time and an output of a second function at the present time,
• wherein the first function includes a decreasing function depending on time,
• wherein the second function includes a decreasing function depending on time,
• wherein the at least one processor selects at least one of the information groups as a retrieval-target using the retrieval target levels calculated by the at least one processor,
• wherein the at least one processor selects at least one of the pieces of information of the selected at least one of the information groups,
• wherein at least one processor retrieves the selected at least one of the information groups,
• wherein the at least one processor calculates the retrieval target level for each one of the information groups using the output of the first function if:
• the retrieval target level is larger than a first threshold value, or
• the respective one of the information groups has not been accessed by a user after the retrieval target level has become equal to or smaller than the first threshold value,
• wherein the at least one processor calculates the retrieval target level for each one of the information groups using the output of the second function if the respective one of the information groups is accessed by a user after the retrieval target level has become equal to or smaller than the first threshold value.

An information processing method comprising:

• calculating a retrieval target level for each one of pieces of information using at least one of an output of a first function at a present time and an output of a second function at the present time;
• wherein the first function includes a decreasing function depending on time, and
• wherein the second function includes a decreasing function depending on time,
• selecting at least one of the pieces of information as a retrieval target using the calculated retrieval target levels;
• and
• retrieving the selected at least one of the pieces of information,
• wherein the calculating comprises:
• calculating the retrieval target level for each one of the pieces of information using the output of the first function if:
• the retrieval target level is larger than a first threshold value, or
• the respective one of the pieces of information has not been accessed by a user after the retrieval target level has become equal to or smaller than the first threshold value;
• and
• calculating the retrieval target level for each one of the pieces of information using the output of the second function if the respective one of the pieces of information is accessed by a user after the retrieval target level has become equal to or smaller than the first threshold value.

A non-transitory computer-readable medium storing a program that causes a computer to execute information processing, the information processing comprising:

• calculating a retrieval target level for each one of pieces of information using at least one of an output of a first function at a present time and an output of a second function at the present time;
• wherein the first function includes a decreasing function depending on time, and
• wherein the second function includes a decreasing function depending on time,
• selecting at least one of the pieces of information as a retrieval target using the calculated retrieval target levels;
• and
• retrieving the selected at least one of the pieces of information,
• wherein the calculating comprises:
• calculating the retrieval target level for each one of the pieces of information using the output of the first function if:
• the retrieval target level is larger than a first threshold value, or
• the respective one of the pieces of information has not been accessed by a user after the retrieval target level has become equal to or smaller than the first threshold value;
• and
• calculating the retrieval target level for each one of the pieces of information using the output of the second function if the respective one of the pieces of information is accessed by a user after the retrieval target level has become equal to or smaller than the first threshold value.