The NutriLight system presents a novel dietary approach designed to enhance health communication, promote sustainable eating habits, and address limitations in existing dietary patterns. Using a traffic light scoring system, it simplifies dietary recommendations, making them more accessible and adaptable across diverse populations. Unlike rigid diets, NutriLight categorises foods into green, yellow, and red groups, encouraging balance rather than restriction. This flexibility allows for cultural adaptations, ensuring relevance in different dietary contexts while supporting planetary health. Additionally, NutriLight mitigates the risk of nutrient deficiencies by emphasising whole, minimally processed foods and reducing overconsumption of unhealthy options. While promising, its effectiveness depends on proper implementation, localised adaptation, and long-term evaluation to confirm its health benefits. By bridging the gap between nutritional science and practical application, NutriLight has the potential to serve as an effective tool in public health nutrition, fostering healthier and more sustainable dietary choices worldwide.

Immigration disrupts the bonding process in families. Maintaining close relationships with adult children can be an important protective factor for older immigrants' health and wellbeing. Quantitative research explaining such close relationships is rare. This study examined factors associated with close parent–child relationships in a purposive sample of 236 older Chinese immigrants in Los Angeles who provided information regarding 365 children. Two-level regression models were estimated to investigate factors contributing to cohesive parent–child relationships among these older adults. The findings showed that co-residence, a characteristic that distinguishes immigrant families from most non-immigrant families, was associated with lower parent–child relationship quality. Frequent contact was associated with closer relationships. While receiving instrumental and monetary support from children was associated with favourable ratings of relationships with children, providing such support to children was not related to parents' assessment of relationship quality. Parental perceptions of children being respectful was also associated with better relationship quality ratings. Overall, the findings demonstrate how family-related changes in the immigration context shape parent–child relationships in later life. Implications for future research and practice are provided.

This paper presents an analysis of a generalized version of the coupon collector problem, in which the collector receives d coupons each run and chooses the least-collected coupon so far. In the asymptotic case when the number of coupons n goes to infinity, we show that, on average, (nlogn) / d + (n / d)(m − 1)log logn + O(mn) runs are needed to collect m sets of coupons. An exact algorithm is also developed for any finite case to compute the exact mean number of runs. Numerical examples are provided to verify our theoretical predictions.

We present results of current measurements on the super-sensitive mini-cyclotron as an accelerator mass spectrometer, successfully developed at Shanghai Institute of Nuclear Research (SINR). We describe new ideas and unique techniques adopted for increasing the transmission efficiency in the injection, acceleration and extraction region, for eliminating various backgrounds and for improving the precision of 14C analysis, which have led to the breakthrough of our Shanghai Mini-Cyclotron Accelerator Mass Spectrometry project. We also discuss further development of the prototype facility.