Apartment dwellers move more and more frequently in recent years. Motives of the move are job transfer, change for better housing, and marriage. The desire for change is the prevailing motive and is spurred by dissatisfaction with the previous residence. The motive for change is the most typical. The move by this motive originates from discontent on the previous residence, and the discontent occurs when 70% of the previous residence period has been lived. Dissatisfaction arises when at least one of the following three living comfort factors is felt by the residents to be unsatisfactory: The ratio of house rent to monthly income, commuting hours, and space.

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In an attempt to uncover various factors which would be considered to underlie Japanese attitudes and behaviors, probes into the deeply routed irrational feeling and belief systems such as luck, superstition, religious awareness and, especially, attitude toward life and death have been made. Presented here are results obtained from an analysis of the attitude toward life and death as measured by questionnaire method. The responses to individual questions were subjected to Hayashi's Quantification III and POSA. The religious-philosophical and ethical-moral aspects of the views were found to be two dimensions of the attitude. Further analyses of the responses in terms of demographic attributes and other awarenesses and behaviors related to the attitude revealed some attitude characteristics which would seem to be peculiar to the Japanese, such as views toward death of the war-surviving generation and views toward mother-child suicide of females in general. The background of these peculiarities were discussed.

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A new variable sclection method is introduced in factor analysis from the viewpoint to preserve the configuration of factor scores in p (=the number of factors) dimensional Euclidean space. Its performance is studied numerically in comparison with four conventional methods and it is shown that the proposed method is superior to the other four methods.

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Pour maintenir la voie ferrée en bon état, on doit connaître la relation entre les gauches de la voie et des variables comme charge de la ligne, vitesse moyenne des circulations, indice de structure du rail, type du rail, qualité de la plateforme, nombre par jour des trains de voyageurs et de marchandises. On discute deux problèmes. Premièrement, la sélection du modéle convenable à estimer les valeur de gauches de la voie parmi les trois modéles. Deuxièmement, la sélection des facteurs sensibles aux gauches de la voie.

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The visual spaces with some visual illusions are discussed from the point of Riemannian geometry. On the assumption that each local visual space is furnished with parallel lines fields, Riemannian metric in the visual spaces of concentric cricles and of radial lines is considered. By this metric tensor, the equations of geodesics are derived, and solved numerically. Further, the scalar curvatures of either visual space can be calculated. Consequently, straight lines in these visual spaces can be considered to be the geodesics in these Riemannian spaces and the scalar curvatures turn out to be both negative.

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