Abstract: A game control method, game server, and program can increase variations on methods for acquiring items, increase the predictability of acquisition of an item with a high rarity value or the like, and heighten interest in the game. Included are the steps of presenting a communication terminal, connected over a communication line, with acquirable item information that, for each item type, includes a total count and an acquisition count or a non-acquisition count of items when receiving, from the communication terminal, a request to present information related to items acquirable by the communication terminal, determining an item to provide to the communication terminal when receiving an item acquisition request from the communication terminal, and changing the acquirable item information when receiving a reset request from the communication terminal.

Abstract: A game control method, game server, and program can increase variations on methods for acquiring items, increase the predictability of acquisition of an item with a high rarity value or the like, and heighten interest in the game. Included are the steps of presenting a communication terminal, connected over a communication line, with acquirable item information that, for each item type, includes a total count and an acquisition count or a non-acquisition count of items when receiving, from the communication terminal, a request to present information related to items acquirable by the communication terminal, determining an item to provide to the communication terminal when receiving an item acquisition request from the communication terminal, and changing the acquirable item information when receiving a reset request from the communication terminal.

Abstract: The RF generator is provided with a first RF power source and a second RF power source that generate RF waves of different frequencies from each other, and respectively supply RF power to a first antenna and a second antenna that are installed in a plasma reactor.

Abstract: A game control method, game server, and program can increase variations on methods for acquiring items, increase the predictability of acquisition of an item with a high rarity value or the like, and heighten interest in the game. Included are the steps of presenting a communication terminal, connected over a communication line, with acquirable item information that, for each item type, includes a total count and an acquisition count or a non-acquisition count of items when receiving, from the communication terminal, a request to present information related to items acquirable by the communication terminal, determining an item to provide to the communication terminal when receiving an item acquisition request from the communication terminal, and changing the acquirable item information when receiving a reset request from the communication terminal.

Abstract: The RF generator is provided with a first RF power source and a second RF power source that generate RF waves of different frequencies from each other, and respectively supply RF power to a first antenna and a second antenna that are installed in a plasma reactor.

Abstract: A game control method, game server, and program can increase variations on methods for acquiring items, increase the predictability of acquisition of an item with a high rarity value or the like, and heighten interest in the game. Included are the steps of presenting a communication terminal, connected over a communication line, with acquirable item information that, for each item type, includes a total count and an acquisition count or a non-acquisition count of items when receiving, from the communication terminal, a request to present information related to items acquirable by the communication terminal, determining an item to provide to the communication terminal when receiving an item acquisition request from the communication terminal, and changing the acquirable item information when receiving a reset request from the communication terminal.

Abstract: A game control method, game server, and program can increase variations on methods for acquiring items, increase the predictability of acquisition of an item with a high rarity value or the like, and heighten interest in the game. Included are the steps of presenting a communication terminal, connected over a communication line, with acquirable item information that, for each item type, includes a total count and an acquisition count or a non-acquisition count of items when receiving, from the communication terminal, a request to present information related to items acquirable by the communication terminal, determining an item to provide to the communication terminal when receiving an item acquisition request from the communication terminal, and changing the acquirable item information when receiving a reset request from the communication terminal.

Abstract: To provide a RF generating apparatus that enables apparatus size to be decreased and the cost reduced thereby while also improving power efficiency by performing a stable matching operation, and to provide a plasma treatment apparatus using said apparatus. This RF generating apparatus comprises a plurality of RF generators and matching units, the matching units being provided with only variable-capacity capacitors connected in parallel, thereby reducing the number of elements in terms of the variable-capacity capacitors. A matching calculation section for the RF generators determines, on the basis of traveling waves and reflection waves detected by a detection circuit, the capacity values of the variable-capacity capacitors for the matching units, while adjusting and determining the oscillation frequencies for oscillation circuits in the RF generators so as to decrease the level of the reflection waves. The plasma treatment apparatus uses this RF generating apparatus.

Abstract: A matching device includes a directional coupler, a matching circuit including a first variable capacitance capacitor and a second variable capacitance capacitor, and a control unit. The control unit calculates a reflection coefficient on the basis of a forward power and a reflected power that are detected by the directional coupler, changes the capacitance value of the first variable capacitance capacitor and the capacitance value of the second variable capacitance capacitor such that the calculated reflection coefficient becomes smaller, and makes the cycle of calculation of the set values of the capacitance value of the first variable capacitance capacitor and the capacitance value of the second variable capacitance capacitor shorter than the cycle of acquisition of the capacitance value of the first variable capacitance capacitor and the capacitance value of the second variable capacitance capacitor.

Abstract: A matching box comprises a directional coupler that detects forward waves and reflected waves; a matching circuit having a first variable capacitance capacitor, a second variable capacitance capacitor, and inductance; and a control unit that calculates a reflection coefficient on the basis of the forward waves and the reflected waves, and controls a capacitance value VC1 of the first variable capacitance capacitor and a capacitance value VC2 of the second variable capacitance capacitor, wherein the control unit changes VC2 if the distance between a matching circle drawn by the trajectory of the reflection coefficient passing through a matching point on a Smith chart, and the calculated reflection coefficient is greater than a prescribed value, and changes VC1 if such distance is set to be no greater than the prescribed value and when the value of such distance becomes no greater than the prescribed value, thereby reducing the reflection coefficient.

Abstract: A game control method, game server, and program can increase variations on methods for acquiring items, increase the predictability of acquisition of an item with a high rarity value or the like, and heighten interest in the game. Included are the steps of presenting a communication terminal, connected over a communication line, with acquirable item information that, for each item type, includes a total count and an acquisition count or a non-acquisition count of items when receiving, from the communication terminal, a request to present information related to items acquirable by the communication terminal, determining an item to provide to the communication terminal when receiving an item acquisition request from the communication terminal, and changing the acquirable item information when receiving a reset request from the communication terminal.

Abstract: To provide a RF generating apparatus that enables apparatus size to be decreased and the cost reduced thereby while also improving power efficiency by performing a stable matching operation, and to provide a plasma treatment apparatus using said apparatus. This RF generating apparatus comprises a plurality of RF generators and matching units, the matching units being provided with only variable-capacity capacitors connected in parallel, thereby reducing the number of elements in terms of the variable-capacity capacitors. A matching calculation section for the RF generators determines, on the basis of traveling waves and reflection waves detected by a detection circuit, the capacity values of the variable-capacity capacitors for the matching units, while adjusting and determining the oscillation frequencies for oscillation circuits in the RF generators so as to decrease the level of the reflection waves. The plasma treatment apparatus uses this RF generating apparatus.

Abstract: A game control method, game server, and program can increase variations on methods for acquiring items, increase the predictability of acquisition of an item with a high rarity value or the like, and heighten interest in the game. Included are the steps of presenting a communication terminal, connected over a communication line, with acquirable item information that, for each item type, includes a total count and an acquisition count or a non-acquisition count of items when receiving, from the communication terminal, a request to present information related to items acquirable by the communication terminal, determining an item to provide to the communication terminal when receiving an item acquisition request from the communication terminal, and changing the acquirable item information when receiving a reset request from the communication terminal.

Abstract: A game control method, game server, and program can increase variations on methods for acquiring items, increase the predictability of acquisition of an item with a high rarity value or the like, and heighten interest in the game. Included are the steps of presenting a communication terminal, connected over a communication line, with acquirable item information that, for each item type, includes a total count and an acquisition count or a non-acquisition count of items when receiving, from the communication terminal, a request to present information related to items acquirable by the communication terminal, determining an item to provide to the communication terminal when receiving an item acquisition request from the communication terminal, and changing the acquirable item information when receiving a reset request from the communication terminal.

Abstract: A game control method, game server, and program can increase variations on methods for acquiring items, increase the predictability of acquisition of an item with a high rarity value or the like, and heighten interest in the game. Included are the steps of presenting a communication terminal, connected over a communication line, with acquirable item information that, for each item type, includes a total count and an acquisition count or a non-acquisition count of items when receiving, from the communication terminal, a request to present information related to items acquirable by the communication terminal, determining an item to provide to the communication terminal when receiving an item acquisition request from the communication terminal, and changing the acquirable item information when receiving a reset request from the communication terminal.

Abstract: A matching device includes: a directional coupler that detects a traveling wave and a reflected wave; a matching circuit that has a first variable capacitance capacitor, a second variable capacitance capacitor and an inductance; and a control unit that calculates a reflection coefficient based on the traveling wave and the reflected wave and controls a capacitance value VC1 of the first variable capacitance capacitor and a capacitance value VC2 of the second variable capacitance capacitor. The control unit changes VC2 such that VC2 moves toward a circle drawn by the trajectory of the reflection coefficient passing through a matching point on a Smith chart, fine-tunes VC1 on the basis of a predicted intersection point with the circle, and when the distance between the calculated reflection coefficient and the circle becomes a predetermined value or less, changes VC1 such that the calculated reflection coefficient approaches zero, and fine-tunes VC2.

Abstract: A matching device includes a directional coupler, a matching circuit including a first variable capacitance capacitor and a second variable capacitance capacitor, and a control unit. The control unit calculates a reflection coefficient on the basis of a forward power and a reflected power that are detected by the directional coupler, changes the capacitance value of the first variable capacitance capacitor and the capacitance value of the second variable capacitance capacitor such that the calculated reflection coefficient becomes smaller, and makes the cycle of calculation of the set values of the capacitance value of the first variable capacitance capacitor and the capacitance value of the second variable capacitance capacitor shorter than the cycle of acquisition of the capacitance value of the first variable capacitance capacitor and the capacitance value of the second variable capacitance capacitor.

Abstract: A game control method, game server, and program can increase variations on methods for acquiring items, increase the predictability of acquisition of an item with a high rarity value or the like, and heighten interest in the game. Included are the steps of presenting a communication terminal, connected over a communication line, with acquirable item information that, for each item type, includes a total count and an acquisition count or a non-acquisition count of items when receiving, from the communication terminal, a request to present information related to items acquirable by the communication terminal, determining an item to provide to the communication terminal when receiving an item acquisition request from the communication terminal, and changing the acquirable item information when receiving a reset request from the communication terminal.

Abstract: A game control method, game server, and program can increase variations on methods for acquiring items, increase the predictability of acquisition of an item with a high rarity value or the like, and heighten interest in the game. Included are the steps of presenting a communication terminal, connected over a communication line, with acquirable item information that, for each item type, includes a total count and an acquisition count or a non-acquisition count of items when receiving, from the communication terminal, a request to present information related to items acquirable by the communication terminal, determining an item to provide to the communication terminal when receiving an item acquisition request from the communication terminal, and changing the acquirable item information when receiving a reset request from the communication terminal.

Abstract: A matching box comprises a directional coupler that detects forward waves and reflected waves; a matching circuit having a first variable capacitance capacitor, a second variable capacitance capacitor, and inductance; and a control unit that calculates a reflection coefficient on the basis of the forward waves and the reflected waves, and controls a capacitance value VC1 of the first variable capacitance capacitor and a capacitance value VC2 of the second variable capacitance capacitor, wherein the control unit changes VC2 if the distance between a matching circle drawn by the trajectory of the reflection coefficient passing through a matching point on a Smith chart, and the calculated reflection coefficient is greater than a prescribed value, and changes VC1 if such distance is set to be no greater than the prescribed value and when the value of such distance becomes no greater than the prescribed value, thereby reducing the reflection coefficient.