Abstract: Provided are: a compound represented by formula (I); a retinoid metabolic pathway inhibitor comprising the same; an agent for increasing the ratio of memory T cells; a prophylactic and/or therapeutic agent for cancer or an infectious disease; a cancer immunotherapeutic adjuvant; an immunopotentiator; and a method for preparing a T cell population wherein the ratio of memory T cells is increased, said method comprising using the compound of formula (I).

Abstract: Provided are: a compound represented by formula (I); a retinoid metabolic pathway inhibitor comprising the same; an agent for increasing the ratio of memory T cells; a prophylactic and/or therapeutic agent for cancer or an infectious disease; a cancer immunotherapeutic adjuvant; an immunopotentiator; and a method for preparing a T cell population wherein the ratio of memory T cells is increased, said method comprising using the compound of formula (I).

Abstract: According to one embodiment, in a double-ring network, a master station includes a transmitting and receiving permission switch portion, a communication port A at an A-system side, a communication port B at a B-system side, a first receiving control circuit portion, a transmitting and receiving control circuit portion, a frame detection determining circuit portion, a frame data generating circuit portion, a logical address determining circuit portion, a live list setting circuit portion and an address list setting circuit portion. The master station determines a token order (a transmission priority, also called a logical address) using a shortest path function by the logical address determining circuit portion and the address list setting circuit portion such that the token order does not depend on physical addresses of transmission stations and is matched to a connection order of transmission stations to realize path optimization. This reduces a transmission time.

Abstract: According to one embodiment, in a double-ring network, a master station includes a transmitting and receiving permission switch portion, a communication port A at an A-system side, a communication port B at a B-system side, a first receiving control circuit portion, a transmitting and receiving control circuit portion, a frame detection determining circuit portion, a frame data generating circuit portion, a logical address determining circuit portion, a live list setting circuit portion and an address list setting circuit portion. The master station determines a token order (a transmission priority, also called a logical address) using a shortest path function by the logical address determining circuit portion and the address list setting circuit portion such that the token order does not depend on physical addresses of transmission stations and is matched to a connection order of transmission stations to realize path optimization. This reduces a transmission time.

Abstract: According to one embodiment, in a double-ring network, a master station includes a transmitting and receiving permission switch portion, a communication port A at an A-system side, a communication port B at a B-system side, a first receiving control circuit portion, a transmitting and receiving control circuit portion, a frame detection determining circuit portion, a frame data generating circuit portion, a logical address determining circuit portion, a live list setting circuit portion and an address list setting circuit portion. The master station determines a token order (a transmission priority, also called a logical address) using a shortest path function by the logical address determining circuit portion and the address list setting circuit portion such that the token order does not depend on physical addresses of transmission stations and is matched to a connection order of transmission stations to realize path optimization. This reduces a transmission time.

Abstract: In a redundancy data transmission device in which a transmission signal is transmitted through all of a plurality of transmission lines constituting a redundancy transmission line and a receiving signal transmitted through any of the transmission line which is normal is selectively received, a check circuit responsive to receiving signals on the respective transmission lines for determining whether or not each of the transmission lines is normal, a detection circuit provided for the respective transmission lines for detecting sender addresses of the signals transmitted thereon, abnormality check means responsive to a determination of the check circuit and a detection of the detection circuit for determining whether or not the respective transmission lines are abnormal and for activating the switch means such that the receiving circuit is connected to a normal transmission line when abnormality is determined thereby and display means for displaying the determination made by the abnormality detection means are