Hitachi, Ltd.

Yoshiaki Hattori

Hiroshi Yoshiura

Hiroshi Tsuji

Hiroshi Majima

Seiichi Domyo

Takashi Saito

Yutaka Otsu

Hiromasa Murakami

Ryoichi Shibuya

A work management method and system which manage a project executed by individuals or groups belonging to an organization. In response to a phase transition request from a task management unit, a workflow management unit performs transition and activation of a business phase included in a process definition, sets a work in work management table, and issues a task addition request. In response to an event addition request or a deletion request, an event management unit adds or deletes events to or from an event queue, monitors an occurrence of the event and, when the event occurs, sends a task status transition request to the task management unit. In response to the task addition request, the task management unit sets a task name and a task status name in the work management table, generates the event associated with the task name, issues the event addition request. In response to the task status transition request described above, the task management unit sets the task status name, such as &ldquo;execute&rdquo; or &ldquo;complete&rdquo;, in a task status column according to the type of the event. When the event type is &ldquo;execute&rdquo;, the task management unit generates the event and issues the event addition request; when the event type is &ldquo;complete&rdquo;, the unit issues a request to delete the generated event. When the task status values of all tasks, including the task that has completed, of the business phase are &ldquo;complete&rdquo;, the task management unit issues the phase transition request.

Project work management method and system

In a data compression method using dictionaries, there are adopted a dynamic dictionary and a static dictionary to prevent the deterioration in the data compression ratio in the leading portion of the input data which cannot be efficiently compressed using the dynamic dictionary. Moreover, the configuration removes the disadvantage of the deterioration in the data compression ratio because character strings having a low appearance frequency occupy a large portion of the dictionary. Data to be compressed is inputted via an input unit to be decomposed into input bit strings 202. Using the input bit string as a retrieval key, a bit string retrieval is conducted through the static dictionary by a decision unit and a reference unit. According to a result from comparison between the input bit string and a bit string of the static dictionary and a result from the retrieval by a retrieving unit through the dynamic dictionary, whether or not the input bit string is to be registered to the dynamic dictionary is determined. For registration of the input bit string, an index is added thereto by a register unit before the registration. The input bit string or an index matching the string is outputted as compressed data.

Method of and apparatus for compressing and decompressing data and data

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Aichi-ken, Japan

Yoshiaki Hattori