Abstract: A heat exchanger includes: a plurality of flat tubes; a fin in which a plurality of notches are arranged side by side in a vertical direction, the fin having a plurality of intermediate portions and a connecting portion connecting the intermediate portions to each other; and a first bulging portion having an upper end edge and a lower end edge provided between a first notch and a second notch, the upper end edge being positioned in the intermediate portion and the lower end edge being positioned in the connecting portion. The upper end edge has a first upper end positioned on an intermediate portion side, and a second upper end positioned on a connecting portion side, the first upper end being positioned to be higher than the second upper end, or the first upper end being positioned at the same height as the second upper end.

Abstract: An air-conditioning apparatus includes a main circuit in which a compressor, a flow switching device, an indoor heat exchanger, a pressure reducing device, and a plurality of parallel heat exchangers connected in parallel with each other are connected by pipes, a bypass pipe, a flow control device provided to the bypass pipe and configured to adjust a flow rate of refrigerant flowing through the bypass pipe, an evaporating pressure sensor configured to measure an evaporating pressure of the refrigerant, and a controller. The air-conditioning apparatus is configured to operate in a normal heating operation mode and a heating-defrosting operation mode. When an operation associated with the normal heating operation mode is switched to an operation associated with the heating-defrosting operation mode, the controller adjusts an opening degree of the flow control device using the evaporating pressure in the parallel heat exchanger and a driving frequency of the compressor.

Abstract: A radiated electromagnetic wave estimation is performed by a computer. The estimation process includes: converting a circuit diagram of an electronic circuit board into a combination of a plurality of partial circuits; and predicting radiated electromagnetic waves from the electronic circuit board by using a prediction result of a radiated electromagnetic wave for each of the partial circuits obtained by the converting.

Abstract: A strength testing apparatus has a plurality of testing axes, each of which breaks a test piece in a central area thereof. The apparatus has a plurality of 1-axis testing structures each having: an actuator, which is configured to move linearly, thereby to apply a load onto a test body; an actuator fixing base, which is configured to fix the actuator at a predetermined position; a reaction base comprising a chucking tool, which is configured to chuck a test piece, in a chucking tool, which is provided at an end portion of the actuator; and a base, which is configured to connect the actuator fixing base and the reaction base, wherein all of the testing axes, each almost passing through an axial center of each actuator, come across at one (1) point, and the 1-axis testing structures are arranged so that they are included in a same plane.

Abstract: A strength testing apparatus has a plurality of testing axes, each of which breaks a test piece in a central area thereof. The apparatus has a plurality of 1-axis testing structures each having: an actuator, which is configured to move linearly, thereby to apply a load onto a test body; an actuator fixing base, which is configured to fix the actuator at a predetermined position; a reaction base comprising a chucking tool, which is configured to chuck a test piece, in a chucking tool, which is provided at an end portion of the actuator; and a base, which is configured to connect the actuator fixing base and the reaction base, wherein all of the testing axes, each almost passing through an axial center of each actuator, come across at one (1) point, and the 1-axis testing structures are arranged so that they are included in a same plane.