Abstract: A commodity monitoring device includes a commodity state detection unit configured to, on the basis of image information of a commodity group area set on a commodity shelf, detect removal of a commodity in a quantity satisfying a predetermined condition from the commodity group area; and a change detection information output unit configured to, if the commodity state detection unit has detected the removal, output to an output destination device change detection information including image time-series data of the commodity group area from a point in time at which the commodity state detection unit detected the removal to a predetermined past point in time.

Abstract: A commodity monitoring device includes a commodity state detection unit configured to, on the basis of image information of a commodity group area set on a commodity shelf, detect removal of a commodity in a quantity satisfying a predetermined condition from the commodity group area; and a change detection information output unit configured to, if the commodity state detection unit has detected the removal, output to an output destination device change detection information including image time-series data of the commodity group area from a point in time at which the commodity state detection unit detected the removal to a predetermined past point in time.

Abstract: A commodity monitoring device includes a commodity state detection unit configured to, on the basis of image information of a commodity group area set on a commodity shelf, detect removal of a commodity in a quantity satisfying a predetermined condition from the commodity group area; and a change detection information output unit configured to, if the commodity state detection unit has detected the removal, output to an output destination device change detection information including image time-series data of the commodity group area from a point in time at which the commodity state detection unit detected the removal to a predetermined past point in time.

Abstract: Globular secondary particles of wollastonite group calcium silicate crystals represented by the formulalCaO.mSiO.sub.2.nH.sub.2 Owherein 1.ltoreq.l.ltoreq.6, 1.ltoreq.m.ltoreq.6 and 0.ltoreq.n.ltoreq.1, characterized in that the particles comprise hollow globular secondary particles of the wollastonite group calcium silicate crystals, the globular secondary particles having an average spontaneous sedimentation height of at least 800 ml, an outside diameter of 5 to 110 .mu.m, an average apparent density of 0.04 to 0.09 g/cm.sup.3 and an average shell density defined by the equationY=0.0033X+Bwherein Y is the average shell density, X is the average diameter of the particles, B is a constant, 15 .mu.m.ltoreq.X.ltoreq.40 .mu.m and 0.ltoreq.B.ltoreq.0.115.

Abstract: Alumina-containing calcium silicate being in the form of secondary particles, shaped bodies and a process for preparing the same, said secondary particles being composed of alumina-containing calcium silicate crystals having an index of crystallite antigrowth of at least 8 and interlocked with one another in the form of a globular shell, the particles being about 5 to about 70 .mu.m in diameter, up to about 0.13 g/cm.sup.3 in apparent density and at least 10 g per particle in initial breaking load, and said shaped bodies being composed of the secondary particles.