Abstract: Compositions comprising methionine, threonine, and a pharmacologically acceptable iron compound as active ingredients are effective for improving or preventing iron deficiency anemia and can be ingested easily and exhibit effects from an early stage.

Abstract: This invention relates to a model apparatus equipped with an equalizer having a transversal filter and adapted so that equalizing characteristics can be set automatically at the time of data communication. A predetermined amount of received training data is stored in memory, the training data stored in intervals between receipt of the training data is read out of the memory, and tap gains of the transversal filter are computed and set in dependence upon the read data, thereby controlling the equalizing characteristics of the equalizer. A mirror image of a past jitter component from the equalizer output obtained before the present point in time is formed by folding over the jitter component at the present point in time. By using the mirror image as a prediction portion, an approaching jitter component is predicted and the equalizing characteristics of the equalizer are controlled so as to cancel out the predicted jitter component. Jitter component removal processing is started by such control.