Ryosuke Takai
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View article: Genetic Diversity and Temporal Shifts of Porcine Reproductive and Respiratory Syndrome Virus Type 2 (PRRSV-2) Strains in Japan (2020–2023): Evidence of Modified Live Vaccine Influence on Cluster Distribution
Genetic Diversity and Temporal Shifts of Porcine Reproductive and Respiratory Syndrome Virus Type 2 (PRRSV-2) Strains in Japan (2020–2023): Evidence of Modified Live Vaccine Influence on Cluster Distribution Open
Background: Porcine reproductive and respiratory syndrome virus type 2 (PRRSV-2) remains a significant threat to swine production globally, including Japan. While the genetic diversity of PRRSV-2 has been reported previously, the potential…
View article: Genetic Diversity and Temporal Shifts of Porcine Reproductive and Respiratory Syndrome Virus Type 2 (PRRSV-2) Strains in Japan (2020–2023): Evidence of Modified Live Vaccine Influence on Cluster Distribution
Genetic Diversity and Temporal Shifts of Porcine Reproductive and Respiratory Syndrome Virus Type 2 (PRRSV-2) Strains in Japan (2020–2023): Evidence of Modified Live Vaccine Influence on Cluster Distribution Open
Background: Porcine reproductive and respiratory syndrome virus type 2 (PRRSV-2) remains a significant threat to swine production globally, including Japan. While the genetic diversity of PRRSV-2 has been reported previously, the potential…
View article: Porcine reproductive and respiratory syndrome virus type 1 and type 2 co-infection in a Japanese swine herd
Porcine reproductive and respiratory syndrome virus type 1 and type 2 co-infection in a Japanese swine herd Open
The status of co-infection with porcine reproductive and respiratory syndrome virus type 1 (PRRSV-1) and type 2 (PRRSV-2) in Japan is poorly understood. A case of such co-infection was identified on a PRRSV-1 non-vaccinated farm in Kagoshi…
View article: Measurement of viscous properties on Al-5mass%Mg alloy in semi-solid state by tensile test with high-frequency induction heating
Measurement of viscous properties on Al-5mass%Mg alloy in semi-solid state by tensile test with high-frequency induction heating Open
To predict hot tearing during DC (direct chill) casting by thermal stress analysis, cooling rate dependence of viscous properties in semi-solid state are indispensable. However, those at cooling rates of DC casting had not been obtained in…
View article: Controlling Factor for Maximum Tensile Stress and Elongation of Aluminum Alloy during Partial Solidification
Controlling Factor for Maximum Tensile Stress and Elongation of Aluminum Alloy during Partial Solidification Open
To predict hot tearing of direct chill casting ingot, both the tensile constitutive behavior and elongation of alloy are inevitable during partial solidification. For predicting both the maximum true stress σss and the elongation εelong re…
View article: Hot tearing prediction of casting via thermal stress analysis
Hot tearing prediction of casting via thermal stress analysis Open
View article: Controlling factor for maximum tensile stress and elongation of aluminum alloy during partial solidification
Controlling factor for maximum tensile stress and elongation of aluminum alloy during partial solidification Open
To predict hot tearing of direct chill casting ingot, both the tensile constitutive behavior and elongation of alloy are inevitable during partial solidification. For predicting both the maximum true stress σss and the elongation εelong re…
View article: Effect of Temperature Field and Mechanical Properties of Casting on Prediction of Hot Tearing Tendency Using FEM Thermal Stress Analysis
Effect of Temperature Field and Mechanical Properties of Casting on Prediction of Hot Tearing Tendency Using FEM Thermal Stress Analysis Open
It is known that hot tearing tendency increases with the increase in the cooling rate of casting during the solidification. As the direct control factors of the hot tearing, the cooling rate dependences of the temperature field of the cast…
View article: Hot tearing susceptibility of aluminum and magnesium alloys during casting (Part 2)
Hot tearing susceptibility of aluminum and magnesium alloys during casting (Part 2) Open
View article: Hot tearing susceptibility of aluminum and magnesium alloys during casting (Part 1)
Hot tearing susceptibility of aluminum and magnesium alloys during casting (Part 1) Open
View article: Prediction and Experimental Validation of Cooling Rate Dependence of Viscoplastic Properties in a Partially Solidified State of Al–5 mass%Mg Alloy
Prediction and Experimental Validation of Cooling Rate Dependence of Viscoplastic Properties in a Partially Solidified State of Al–5 mass%Mg Alloy Open
To predict hot tearing in direct chill (DC) casting and shape casting of aluminum alloys using thermal stress analysis, cooling rate dependence of viscoplastic properties in a partially solidified state is indispensable. Based on viscoplas…
View article: Prediction and experimental validation of cooling rate dependence of viscoplastic properties in a partially solidified state of Al–5mass%Mg alloy
Prediction and experimental validation of cooling rate dependence of viscoplastic properties in a partially solidified state of Al–5mass%Mg alloy Open
To predict hot tearing in direct chill (DC) casting and shape casting of aluminum alloys using thermal stress analysis, cooling rate dependence of viscoplastic properties in a partially solidified state is indispensable. Based on viscoplas…
View article: Development and application of a wheel-type robot tractor
Development and application of a wheel-type robot tractor Open
In this study, a wheel-type robot tractor was developed in order to reduce agricultural labor. An RTK-GPS (real-time kinematic global positioning system) and an IMU (inertial measurement unit) were used as position and attitude sensors for…
View article: Effect of grain refinement on the mechanical behavior in partially solidified Al-Mg alloy and its relation to hot tearing susceptibility
Effect of grain refinement on the mechanical behavior in partially solidified Al-Mg alloy and its relation to hot tearing susceptibility Open
View article: Development of an Elasto-Viscoplastic Constitutive Equation for an Al-Mg Alloy Undergoing a Tensile Test during Partial Solidification
Development of an Elasto-Viscoplastic Constitutive Equation for an Al-Mg Alloy Undergoing a Tensile Test during Partial Solidification Open
Predicting hot tearing during direct chill casting using thermal stress analysis requires constitutive equations in both semi-solid state and below the solidus of the alloy. However, numerous difficulties have been hindered constitutive eq…