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Colorectal adenomas are considered to be precursors of colorectal cancer. B-vitamins (i.e., folate, vitamin B(6) and B(12)) are involved in homocysteine metabolism and play an important role as coenzymes in 1-carbon metabolism, which is thought to have a critical role in the progression of colorectal polyps. The purpose of this study was to examine the effects of B-vitamins and homocysteine on the risk of developing colorectal polyps. Forty-eight participants with colorectal polyps [29 adenomatous polyps (AP), 19 hyperplastic polyps (HP)], and 96 age- and sex-matched healthy controls were recruited. Fasting blood was drawn from each participant to measure hematological parameters, plasma pyridoxal 5'-phosphate (PLP), serum folate and vitamin B(12), and plasma homocysteine. Participants with AP and HP had significantly higher plasma homocysteine levels than did healthy controls. There was no significant difference in serum folate and vitamin B(12) and plasma PLP among the 3 groups. B-vitamins had no significant effect on the risk of colorectal polyps. However, participants with higher plasma homocysteine [odds ratio (OR) = 1.87, 95% confidence interval (CI) = 1.13, 3.08) level exhibited significantly increased risk of colorectal polyps after adjusting for potential confounders. Plasma homocysteine was a strong predictor of the risk of colorectal polyps in participants with adequate B-vitamins status.

Through discussions on the fundamental properties of the generalized Einstein's Lagrangian density for a gravitational system, the theoretical foundations of the modified Einstein's field equations and the Lorentz and Levi-Civita's conservation laws are systematically studied. The theory of cosmology founded on them is discussed in detail and some new properties and new effects of the cosmos are deduced; these new properties and new effects could be tested via future experiments and observations.

The clubhouse model is a community psychiatric rehabilitation program aiming to provide a restorative environment for people with severe mental health problems. These clubhouses provide their members with opportunities for friendship, employment, and education, which help them on their paths towards mental health recovery. Towards that end, the model features clubhouse members and staff working side by side to execute clubhouse activities. That is, unlike most of the community mental health programs where staff provide services to their clients, clubhouse staff are required to partner with members in their work. The aim of this qualitative study was to understand how the clubhouse staff elicited member participation and facilitate recovery. The research was conducted between Year 2013 and Year 2014 at the world's first clubhouse: Fountain House in New York City. The first author conducted 262 hr of active participant observation in 41 visits to Fountain House, and in‐depth interviews with 38 staff members who had worked at Fountain House for at least 1 month during the study period. The dimensional analysis procedure was used to analyse the observation notes and interview transcripts. Results showed that participation was a key to rebuilding members’ self‐confidence, which further encouraged members to seek more opportunities for self‐enhancement and personal growth. Specific organisational policies, programming, practical considerations, and other strategies shaped a positive environment for members to exercise autonomy, experience self‐efficacy, and model behaviours after others who have succeeded. Findings of this research support the egalitarian staff–member relationships and the maintenance of an open and transparent atmosphere of the clubhouse, as observational learning enables members to move forward with their journeys to recovery. Findings also may inform efforts to shift traditional psychiatric services towards recovery‐oriented care.

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By summarizing and extending the Lagrangian densities of the general relativity and the Kibble's gauge theory of gravitation，a further generalized Lagrangian density for a gravitational system is obtained and analyzed in greater detail, which can be used for studying more extensive range of gravitation. Many special cases can be derived from this generalized Lagrangian density, their general characters and peculiarities will be briefly described.

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