Abstract: Provided is a submerged arc welding method that produces little fume, has good weldability, and is suitable for welding high-Mn-containing steel materials to be used in cryogenic environments. The method includes welding with a combination of a wire having a predetermined chemical composition and flux having a basicity [BL] of 1.5 to 2.4, while adjusting a welding heat input according to a groove cross-sectional area. In this way, a weld metal with high strength and excellent cryogenic impact toughness where the 0.2% proof stress at room temperature is 400 MPa or more and an absorbed energy (vE?196) in the Charpy impact test is 28 J or more can be easily manufactured.

Abstract: According to one embodiment, a memory system includes a semiconductor memory and a controller. The semiconductor memory includes first to fourth word lines and first to fourth memory cells. The controller is configured to issue first and second instructions. The controller is further configured to execute a first operation to obtain a first read voltage based on a threshold distribution of the first memory cell, and a second operation to read data from the second memory cell.

Abstract: A system for controlling a power shovel for use in civil engineering works is described. The control system comprises a manual control lever consisting of a control boom, a control arm and a control bucket which are miniature of a boom, an arm and a bucket of the power shovel, and a control circuit. The control circuit includes means for detecting the displacement of the elements of the control lever, means for detecting the displacement of the elements of the power shovel, means for comparing the displacement of the control lever with one of the power shovel. The differential signal from the circuit is applied to servo-mechanisms for following up the power shovel in accordance with the movement of the control lever. The power shovel can be controlled equally with the manual control lever.