Abstract: A hair growth promotor which is an ethanol or aqueous ethanol preparation comprising, as active ingredients for a hair growth promotor, (A) at least one compound selected from fatty acids having a chain length of an odd number of carbon atoms, the derivatives of the fatty acids, aliphatic alcohols having a chain length of an odd number of carbon atoms and the derivatives of the aliphatic alcohols and (B) at least one selected from 6-benzylaminopurine and/or the derivatives thereof represented by the following Formula (I), wherein it further comprises (C) at least one of polyglycerin fatty acid esters and (D) at least one of sorbitan fatty acid esters: in Formula (I), R1 and R2 are defined. The hair growth promotor can have an excellent hair growth effect and can provide an excellent stabilization effect at low temperature and can provide good feeling having no stickiness.

Abstract: One or more esters selected among an ester of a C2-10 fatty acid with a polyhydric alcohol, an ester of a monobasic hydroxy acid with a mono- or polyhydric alcohol, and an ester of a polybasic acid with a mono- or polyhydric alcohol are incorporated into a cosmetic hair preparation comprising a crystalline compound and a solvent in which the compound dissolves. Due to this, the crystalline compound is inhibited from crystallizing/precipitating at low temperatures and the preparation can give an improved use feeling during use.

Abstract: A hair growth promotor which is an ethanol or aqueous ethanol preparation comprising, as active ingredients for a hair growth promotor, (A) at least one compound selected from fatty acids having a chain length of an odd number of carbon atoms, the derivatives of the fatty acids, aliphatic alcohols having a chain length of an odd number of carbon atoms and the derivatives of the aliphatic alcohols and (B) at least one selected from 6-benzylaminopurine and/or the derivatives thereof represented by the following Formula (I), wherein it further comprises (C) at least one of polyglycerin fatty acid esters and (D) at least one of sorbitan fatty acid esters: in Formula (I), R1 and R2 are defined. The hair growth promotor can have an excellent hair growth effect and can provide an excellent stabilization effect at low temperature and can provide good feeling having no stickiness.

Abstract: In an induction motor controlling device for controlling a primary voltage V.sub.1(n) at discrete timings, a primary current I.sub.1(n) is detected and the following torque factor parameter u.sub.(n) is derived: ##EQU1## whereD.sub.1(n) =(V.sub.1(n) /I.sub.i(n)).sup.2 -(R.sub.1.sup.2 +x.sub.1(n).sup.2)D.sub.2(n) =R.sub.1.sup.2 +(x.sub.1(n) +x.sub.m(n)).sup.2 -(V.sub.1(n) /I.sub.1(n)).sup.2R.sub.1 : the resistance of a primary winding,x.sub.1 : primary leakage reactance,x.sub.m : exciting reactance.Then, the magnitude C.sub.(n) of the present excitation current and a target value u*.sub.(n) of the torque factor parameter which gives a maximum efficiency are derived according to the following equations, ##EQU2## where R.sub.21 : the resistance of a secondary winding.The magnitude C.sub.

Abstract: A control target value x.sub.s, a present control signal x(n), and a present operating signal y(n) are input to a first control element which calculates r(n).y(n) where r(n) is the value of the ratio of the control target value to the control signal (=x.sub.s /x(n)). The control target value x.sub.s, the control signal x(n), and a differential parameter kd of the conventional PID control set by a parameter setting device are input to a second control element which calculates kd.r(n)(.DELTA.x.sub.s (n)-r(N)..DELTA.x(n)) where .DELTA.x.sub.s (n)=x.sub.s (n)-x.sub.s (n-1) and .DELTA.x(n)=x(n)-x(n-1). The outputs of both control elements are added to yield the next operating signal y(n+1). This design can provide an automatic control apparatus capable of achieving a good control performance even if an object element has a non-linear characteristic.

Abstract: A control apparatus for a mechanical device includes a control element for receiving a reference input signal and supplying an operating signal to the mechanical device, a main feedback element for detecting the control signal and supplying the detected control signal to the control element, and an auxiliary feedback element for detecting the operating signal to be supplied to the mechanical element and supplying the detected operating signal to the control element. The control element produces the operating signal based on the reference input signal, the control signal supplied from the main feedback element, and the operating signal supplied from the auxiliary feedback element to regulate the control speed such that hunting in the control apparatus does not occur.