An Osaka Metropolitan University researcher examined the nonlinear multidimensional factors that correlate with population changes according to city size. The results indicate that population changes correlated with welfare expenditures in small and medium-sized cities.

Nagoya University researchers in Japan have found that drug effectiveness, alcohol tolerance, and carbohydrate metabolism change with the seasons. Their findings are based on a comprehensive seasonal gene expression map, which investigated over 54,000 genes in 80 tissues in monkeys across one year. The study has implications for drug prescription and precision medicine.

Researchers in Japan have developed a predictive model that could improve treatment decisions for advanced pancreatic cancer patients. By combining tumor marker readings with patients' genetic information, their model predicts patient survival outcomes with greater accuracy and better identifies candidates who would benefit from surgery. The researchers found that specific genetic variations have a greater impact on tumor marker levels than the severity of the cancer. 

It is expected that the new model will be used as an indicator to determine if surgery is a good option for patients receiving chemotherapy or radiation treatment. The study was published in the British Journal of Surgery. 

On Jan. 1, 2024, a 7.5-magnitude earthquake struck the Noto Peninsula in Japan, resulting in extensive damage in the region caused by uplift, when the land rises due to shifting tectonic plates. The observed uplift, however, varied significantly, with some areas experiencing as much as a 5-meter rise of the ground surface. To better understand how the characteristics of the affected fault lines impact earthquake dynamics, researchers in Japan used recently developed simulations to make a detailed model of the fault. The findings could help develop models to simulate scenarios of different earthquakes and mitigate disasters in the future.

Annealing processors, used for solving combinatorial optimization problems based on fully coupled Ising models, are limited in capacity and precision. While previous studies have developed scalable systems that allow scaling of the number of spins or capacity, their precision or interaction bit width remains fixed. In a new study, researchers have developed a novel dual scalable annealing processing system that allows both expansion in the number of spins and interaction bit width.

Multipath interference disrupts wireless signals, causing issues like TV ghosting and fading. Now, researchers from Japan have developed a passive metasurface that overcomes traditional filtering limits. Using a time-varying interlocking mechanism with field-effect transistors, it transmits the first signal while blocking delayed ones from other angles—without power or processing. This innovation enables low-cost, reliable wireless communication, which is ideal for IoT applications and environments prone to interference.