Abstract: Provided are a measurement system and a radio wave shielding member that include a radio wave absorber that has light transmittance and absorbs radio waves other than the radio waves to be measured, and thus is suitable for the measurement of radio wave properties. The measurement system includes a measuring target device 11, a measuring device 12 that emits and/or receives radio waves to measure the measuring target device, and a radio wave absorber 10 that has light transmittance and absorbs radio waves in and above the millimeter wave band. The radio wave absorber includes a transparent support member 2 and a radio wave absorbing sheet 1 that is attached to one surface of the support member. The radio wave absorbing sheet includes a resistive film 3, a dielectric layer 4, and a radio wave shielding layer 5 which are stacked on top of each other and all of which have light transmittance. The radio wave absorber blocks and/or absorbs unwanted radio waves around the measuring target device.

Abstract: A server device has a processor that is configured to determine which unit system in a plurality of unit systems is a reference unit system of model data of an article, wherein the processor is configured to: acquire a feature dimension value used for the determination based on the model data; and determine the reference unit system based on a result obtained when the feature dimension value is defined according to each of the plurality of unit systems.

Abstract: A numerical operation system for a plurality of individuals includes a contactless communication tag each included in a plurality of individuals, a reader allowed to read the contactless communication tag, and a control unit to which a result read by the reader is input, wherein the control unit is configured such as to acquire, from the result read by the reader, at least numerical values each corresponding to the plurality of individuals and operator symbols for operating the numerical values to calculate a total value based on the numerical values and the operator symbols.

Abstract: An authentication method includes a first step and a second step. The first step causes a voice including a predetermined character string to be output from a speaker 23. The second step acquires voice information by receiving an utterance voice of the target user via a microphone 21 after the first step, and determines from the voice information whether the target user is the specific user or not. In the second step, it is determined whether a character string recognized from the voice information is matched to the predetermined character string. In the second step, it is determined whether characteristics of the utterance voice of the target user is matched to characteristics of the voice of the target user based on a characteristics amount recognized from the voice information and a characteristics amount of voice information registered in advance as the voice of the specific user.

Abstract: A numerical operation system for a plurality of individuals includes a contactless communication tag each included in a plurality of individuals, a reader allowed to read the contactless communication tag, and a control unit to which a result read by the reader is input, wherein the control unit is configured such as to acquire, from the result read by the reader, at least numerical values each corresponding to the plurality of individuals and operator symbols for operating the numerical values to calculate a total value based on the numerical values and the operator symbols.

Abstract: A semiconductor device includes a first semiconductor layer provided over a substrate; an electron transit layer contacting a top of the first semiconductor layer; and a second semiconductor layer contacting a top of the electron transit layer, wherein the electron transit layer has a dual quantum well layer having a structure where a first well layer, an intermediate barrier layer, and a second well layer are sequentially stacked, an energy of a conduction band of the intermediate barrier layer is lower than an energy of conduction band of the first semiconductor layer and the second semiconductor layer, and a ground level is generated in the first and second well layers, and a first excitation level is generated in the dual quantum well layer.