Abstract: In a first aspect, a communication control method is a communication control method used in a mobile communication system for providing a multicast broadcast service (MBS). The communication control method includes: transmitting, by a base station to a group including a plurality of user equipments, a group notification indicating activation of a multicast session corresponding to the group; and receiving, by the base station, a random access preamble transmitted from the user equipment in response to reception of the group notification. The transmitting of the group notification includes transmitting, by the base station, the group notification to each of a plurality of subgroups at different timings, the plurality of subgroups being obtained by dividing the group.

Abstract: A stepping motor includes a first plate; a second plate having a side facing the first plate and a reverse side; a stator held by the first plate and the second plate axially; plural band connecting portions equipped in the first plate, disposed at a side surface of the stator, extending toward the second plate and having an engaging portion at an outer side thereof; and a band portion contacting the reverse side of the second plate, extending toward the first plate and having plural arm portions engaging respective engaging portions of the band connecting portion. The band portion is connected to the first plate while holding the second plate and the stator therebetween by engaging the plural arms with the engaging portions, the band portion is elastically deformed, the deformation causes tensile force in which the arm portions pull the band connecting portions toward the band portion.

Abstract: A sound masking apparatus includes an information acquirer which acquires a mixing ratio between a disturbing sound and a non-disturbing sound which are included in a masker sound, and a volume controller which controls a volume of the disturbing sound and a volume of the non-disturbing sound so as to be the mixing ratio, while a volume of the masker sound is a constant value.

Abstract: A sound masking apparatus includes a reproduction processor configured to detect periodicity in a masker sound and add a delay to the masker sound in accordance with a detection result of the periodicity. The sound masking apparatus can prevent an unbalanced sound pressure distribution of masker sounds within an acoustic space without causing discomfort to a listener.

Abstract: Whereas a high masking effect can be secured in a space to which a masking sound is emitted, the degree of a discomfort a person existing in the space suffers can be reduced. In superimposition processing, a CPU 21 extracts sound signals in different intervals of a sound signal X12-n of a human voice, superimposes the extracted sound signals on each other on the time axis, and outputs a resulting superimposed sound signal X13-n. In shift and addition processing, the CPU 12 interchanges a sound signal, before a reference position, of a sound signal X16-n and a sound signal, after the reference position, of the sound signal X16-n (shift processing) and outputs a sound signal X17-n obtained by adding together a shift-processed sound signal X16?-n and the original, non-shift-processed sound signal X16-n.

Abstract: Each of ECUs counts the number of messages transmitted for each of CAN IDs. A transmission node that has transmitted a main message produces an MAC from a data field and the CAN ID in the main message and a counter value corresponding to the CAN ID, and transmits the MAC as an MAC message. A reception node that has received the main message produces an MAC from the data field and the CAN ID contained in the main message and the counter value corresponding to the CAN ID, and determines whether the MAC matches the MAC contained in the MAC message. By so doing, verification whether the main message is valid or not can be made. According to this configuration, message authentication by the MAC can be made without changing a CAN protocol.

Abstract: A structure reliably secures a stepping motor to a circuit board. The stepping motor has an axially protruding boss portion accommodating a shaft in the inside, which boss portion is provided to be snapped into a circuit board, axially protruding current conducting terminal pins that are made so as to be soldered to the circuit board, and securing pins not functioning as electrodes, which securing pins are made so as to be soldered to the circuit board and are arranged in a position whereby they sandwich the boss portion between themselves and the current conducting terminal pins.

Abstract: A stepping motor comprises: a first plate having plural band connection portions; a second plate mounting a band; a stator; and a structure that the stator is held by the first plate and the second plate from a front side and a back side of axial direction, wherein the plural band connection portions are positioned at a side surface of the stator and extend toward the second plate, and each of the plural band connection portions has an engagement portion at an outside thereof, the band has plural arms extending toward the first plate and engaging with the engagement portion of each of the plural band connection portions, and the band is connected to the first plate by engaging the arm portions with the engagement portions in a condition that the band holds the second plate and the stator.

Abstract: A stepping motor includes a stator, a rotor which is rotatable to the stator, a rotor-side position regulation part which is fixed to the rotor and is rotated together with the rotor, and a stator-side position regulation part which is fixed to the stator. The rotor includes a rotary shaft, and a rotor magnet which is mounted on an outer periphery of the rotary shaft. The rotary shaft is integrally formed with the rotor magnet by resin. The stator-side position regulation part includes a first stator-side position regulation part which contacts the rotor-side position regulation part at a first position to regulate a rotation of the rotor in one direction, and a second stator-side position regulation part which contacts the rotor-side position regulation part at a second position different from the first position to regulate a rotation of the rotor in an opposite direction to the one direction.

Abstract: A cryptographic communication system constituted by a first communication device, and a second communication device that stores a master key serving as an encryption key, the cryptographic communication system being characterized in that said first communication device has a common key storing unit configured to store a key pair constituted by a first key serving as a common key used to communicate with said second communication device and a second key obtained by encrypting said first key by using said master key held by said second communication device, and also has a common key transmitting unit configured to transmit said second key to said second communication device, and said second communication device has common key obtaining unit configured to receive said second key and obtaining said first key by decrypting said received second key by using said master key.

Abstract: Each of ECUs counts the number of messages transmitted for each of CAN IDs. A transmission node that has transmitted a main message produces an MAC from a data field and the CAN ID in the main message and a counter value corresponding to the CAN ID, and transmits the MAC as an MAC message. A reception node that has received the main message produces an MAC from the data field and the CAN ID contained in the main message and the counter value corresponding to the CAN ID, and determines whether the MAC matches the MAC contained in the MAC message. By so doing, verification whether the main message is valid or not can be made. According to this configuration, message authentication by the MAC can be made without changing a CAN protocol.

Abstract: In a masker sound generation apparatus, an acquisition part acquires a sound signal, and a generation part generates a masker sound signal based on the acquired sound signal. Specifically, the generation part divides the sound signal acquired by the acquisition part into a plurality of sections each having a predetermined time length, then repeats a sorting process of sorting the divided sections as a process of changing the sequence of arrangement of the sound signal, and alters a manner of sorting the sections each time the sorting process is repeated.

Abstract: A stepping motor includes a first plate; a second plate having a side facing the first plate and a reverse side; a stator held by the first plate and the second plate axially; plural band connecting portions equipped in the first plate, disposed at a side surface of the stator, extending toward the second plate and having an engaging portion at an outer side thereof; and a band portion contacting the reverse side of the second plate, extending toward the first plate and having plural arm portions engaging respective engaging portions of the band connecting portion. The band portion is connected to the first plate while holding the second plate and the stator therebetween by engaging the plural arms with the engaging portions, the band portion is elastically deformed, the deformation causes tensile force in which the arm portions pull the band connecting portions toward the band portion.

Abstract: There is provided a masking sound output device which prevents interference and an echo even in the case where plural apparatus output the same masking sounds. A masking sound generating unit 11 reproduces each of a disturbing sound, a background sound, and a dramatic sound repeatedly for a prescribed time each time. Return reproduction of each of the disturbing sound and the background sound is started with prescribed timing before it is reproduced fully for the prescribed time. The start timing of the return reproduction varies from one device to another. Unlike the disturbing sound and the background sound, the dramatic sound is not returned halfway; its reproduction timing is adjusted by inserting silent intervals. In particular, the silent interval length of the dramatic sound is varied randomly so that a listener does not recognize the repetition.

Abstract: A structure reliably secures a stepping motor to a circuit board. The stepping motor has an axially protruding boss portion accommodating a shaft in the inside, which boss portion is provided to be snapped into a circuit board, axially protruding current conducting terminal pins that are made so as to be soldered to the circuit board, and securing pins not functioning as electrodes, which securing pins are made so as to be soldered to the circuit board and are arranged in a position whereby they sandwich the boss portion between themselves and the current conducting terminal pins.

Abstract: Whereas a high masking effect can be secured in a space to which a masking sound is emitted, the degree of a discomfort a person existing in the space suffers can be reduced. In superimposition processing, a CPU 21 extracts sound signals in different intervals of a sound signal X12-n of a human voice, superimposes the extracted sound signals on each other on the time axis, and outputs a resulting superimposed sound signal X13-n. In shift and addition processing, the CPU 12 interchanges a sound signal, before a reference position, of a sound signal X16-n and a sound signal, after the reference position, of the sound signal X16-n (shift processing) and outputs a sound signal X17-n obtained by adding together a shift-processed sound signal X16?-n and the original, non-shift-processed sound signal X16-n.

Abstract: A stepping motor includes a stator, a rotor which is rotatable to the stator, a rotor-side position regulation part which is fixed to the rotor and is rotated together with the rotor, and a stator-side position regulation part which is fixed to the stator. The rotor includes a rotary shaft, and a rotor magnet which is mounted on an outer periphery of the rotary shaft. The rotary shaft is integrally formed with the rotor magnet by resin. The stator-side position regulation part includes a first stator-side position regulation part which contacts the rotor-side position regulation part at a first position to regulate a rotation of the rotor in one direction, and a second stator-side position regulation part which contacts the rotor-side position regulation part at a second position different from the first position to regulate a rotation of the rotor in an opposite direction to the one direction.

Abstract: In a masking sound generation apparatus, a CPU analyzes a speech utterance speed of a received sound signal. Then, the CPU copies the received sound signal into a plurality of sound signals and performs the following processing on each of the sound signals. Namely, the CPU divides each of the sound signals into frames on the basis of a frame length determined on the basis of the speech utterance speed. Reverse process is performed on each of the frames to replace a waveform of the frame with a reverse waveform, and a windowing process is performed to achieve a smooth connection between the frames. Then, the CPU randomly rearranges the order of the frames and mixes the plurality of sound signals to generate a masking sound signal.

Abstract: In a masking sound generation apparatus, a CPU analyzes a speech utterance speed of a received sound signal. Then, the CPU copies the received sound signal into a plurality of sound signals and performs the following processing on each of the sound signals. Namely, the CPU divides each of the sound signals into frames on the basis of a frame length determined on the basis of the speech utterance speed. Reverse process is performed on each of the frames to replace a waveform of the frame with a reverse waveform, and a windowing process is performed to achieve a smooth connection between the frames. Then, the CPU randomly rearranges the order of the frames and mixes the plurality of sound signals to generate a masking sound signal.

Abstract: In a masking sound generation apparatus, a CPU analyzes a speech utterance speed of a received sound signal. Then, the CPU copies the received sound signal into a plurality of sound signals and performs the following processing on each of the sound signals. Namely, the CPU divides each of the sound signals into frames on the basis of a frame length determined on the basis of the speech utterance speed. Reverse process is performed on each of the frames to replace a waveform of the frame with a reverse waveform, and a windowing process is performed to achieve a smooth connection between the frames. Then, the CPU randomly rearranges the order of the frames and mixes the plurality of sound signals to generate a masking sound signal.