Report for Robocon - Project Activities in 2023

departmental bulletin pape

Materiality of the Dead in Mark Twain's The American Claimant (1892)―From "One-Armed Pete" to "Death Business" ―

In this paper I examine the commercial value behind the "business of death" in 19th-century America through literature through Mark Twain's The American Claimant. Particular attention is paid to the practical procedure of embalming, and the imaginary technique of "materializing a corpse, or resurrecting the dead," as described in Twain's novel. By focusing on Pete's doubly exploitative death, I aim to shed new light on this work by considering how the "materialization of the dead" connects to this war-wounded cripple and to death in postbellum America. I then present the possibility of projecting Twain's vision into an industrial perspective on 21st-century AI technology.departmental bulletin pape

Report on the first year of use of Nagano National College of Technology's bouldering wall

departmental bulletin pape

リベラルアーツ教育院 研究発表題目一覧

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Flexural Properties of Damaged RC Beams Subjected to Axial Compression in the Vertical Direction

The longevity of social infrastructure is a societal need, and various reinforcement techniques have been proposed for concrete structures. The authors propose a reinforcement technique where bolts are inserted vertically into sound beams and tightened with nuts to apply compressive force. Results from bending tests indicate an expected improvement in ductility. This study applies the proposed method to RC beams with damage and examines its bending behavior. Reinforcing the damaged area with the proposed method confirms an increase in vertical displacement but a decrease in stiffness. Reinforcement at a distance from the damaged area does not increase vertical displacement, yet slightly enhances load-bearing capacity.departmental bulletin pape

What was Newton's Word "hypotheses non fingo"? ―History of its Generation and its Translation―

Newton's "Hypotheses non fingo" is one of the most famous and influential words which he used. Its English or other languages translations are various. In this paper, I try to give the proper English and Japanese translation through examining the process of generation of this word. Unlike previous studies, I argue that Newton was not initially conscious that this word must be translated as "I do not feign hypotheses" (most known translation today). Rather, Newton had getting to intend to include pejorative meaning into this word in order to clarify the difference of his philosophical methodology from Leibniz's one. As a result, the English translation "I do not feign hypotheses" became authoritative translation after establishing his philosophical position (1716 at the earliest) although he was unconscious it at the time he wrote this word in the second edition of the "Principia" (1713).departmental bulletin pape

Electric discharge machining of TiB2-B4C composite ceramics by spark plasma sintering and changes in mechanical properties

TiB2-B4C composite ceramics containing 0-80mol% B4C were fabricated from TiB2 and B4C powders by spark plasma sintering (SPS) method. Wire-cut electrical discharge machining (EDM) was performed on the sintered compacts to investigate changes in mechanical and electrical properties. In the electric discharge machining, the composition containing 0 to 60 mol% of B4C with high electrical conductivity was able to be machined according to the machining setting conditions. By electric discharge machining, the hardness improved by about 11% on average, the bending strength decreased by about 20%, the surface roughness decreased to about 1/120 to 1/300, and the electrical conductivity decreased by about 10%.departmental bulletin pape

機械ロボティクス系 研究発表題目一覧

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Mechanical and electrical properties of TiB2-TiC composite ceramics by spark plasma sintering

TiB2-TiC ceramic composites containing 0 up to 100 mol%TiC (20mol%steps) were fabricated from a mixture of TiB2 and TiC powders by spark plasma sintering(SPS) method, and properties of those materials were investigated. The derived TiB2-TiC composite containing 20～80mol%TiC have high properties: a relative density of 97.5～99.6%, Vickers hardness of 20.4～21.4 GPa, flexural strength of 476～575 MPa, fracture toughness (KIC) of 6.01～7.15 MPa･ｍ1/2, Young's modulus of 475～561 GPa, and electrical conductivity of 2.28～6.53 MS/m. The composites present high mechanical properties compared with those for TiB2 or TiC single phase. The composites are suitable as ceramic mold materials machinable by electric discharge.departmental bulletin pape

Prototype of Improved Version of Algorithm Learning Materials for Lower Grade Children

departmental bulletin pape