4,748 research outputs found
SES gradient in psychological distress revisited: a dynamic perspective on the mediating effect of financial strain and mastery
There is a well-established literature that both psychological distress and mental disorders are linked to the gradient of socioeconomic status (SES). According to the stress process model or the life stress paradigm, SES could affect mental health in at least two ways: first, by creating situations where lower SES people tend to experience stressors in greater quantity; second, by enhancing (e.g., due to underexposure of stress for high SES people) or undermining (e.g., due to overexposure of stress for low SES people) coping resources that are beneficial to psychological wellbeing. While the stress process model or the life stress paradigm underscores an intra-personal process where changes in stress, resources, and distress are hypothesized to be inter-correlated within the same individual over time, most previous research on testing relevant hypotheses has been cross-sectional by design, focusing on between-person differences in stress, resources, and distress across the SES spectrum. Even among those exceptions that have collected data at multiple occasions in time, the prevailing analytic approaches have failed to take into account individual variations in the trajectories (either growth or decline) of stress, resources, and distress across time. This study extends previous research by using panel data and latent growth curve (LGC) modeling to examine the extent to which intra-individual changes in depressive symptoms are related to fluctuations in financial strain and mastery, which in turn, are conditioned by chronic level of income as a relatively stable SES attribute. This study also adds to previous research by investigating the causal sequence between psychological distress as indexed by depressive symptoms and a major form of personal resources as reflected in one\u27s sense of mastery, since they have appeared to be causally reciprocal in their strong inverse correlation with each other as part of the general sense of demoralization
Mean Teacher DETR with Masked Feature Alignment: A Robust Domain Adaptive Detection Transformer Framework
Unsupervised domain adaptation object detection (UDAOD) research on Detection
Transformer(DETR) mainly focuses on feature alignment and existing methods can
be divided into two kinds, each of which has its unresolved issues. One-stage
feature alignment methods can easily lead to performance fluctuation and
training stagnation. Two-stage feature alignment method based on mean teacher
comprises a pretraining stage followed by a self-training stage, each facing
problems in obtaining reliable pretrained model and achieving consistent
performance gains. Methods mentioned above have not yet explore how to utilize
the third related domain such as target-like domain to assist adaptation. To
address these issues, we propose a two-stage framework named MTM, i.e. Mean
Teacher-DETR with Masked Feature Alignment. In the pretraining stage, we
utilize labeled target-like images produced by image style transfer to avoid
performance fluctuation. In the self-training stage, we leverage unlabeled
target images by pseudo labels based on mean teacher and propose a module
called Object Queries Knowledge Transfer (OQKT) to ensure consistent
performance gains of the student model. Most importantly, we propose masked
feature alignment methods including Masked Domain Query-based Feature Alignment
(MDQFA) and Masked Token-wise Feature Alignment (MTWFA) to alleviate domain
shift in a more robust way, which not only prevent training stagnation and lead
to a robust pretrained model in the pretraining stage, but also enhance the
model's target performance in the self-training stage. Experiments on three
challenging scenarios and a theoretical analysis verify the effectiveness of
MTM.Comment: AAAI202
Comparison of two efficient methods for calculating partition functions
In the long-time pursuit of the solution to calculate the partition function
(or free energy) of condensed matter, Monte-Carlo-based nested sampling should
be the state-of-the-art method, and very recently, we established a direct
integral approach that works at least four orders faster. In present work, the
above two methods were applied to solid argon at temperatures up to K, and
the derived internal energy and pressure were compared with the molecular
dynamics simulation as well as experimental measurements, showing that the
calculation precision of our approach is about 10 times higher than that of the
nested sampling method.Comment: 6 pages, 4 figure
Environmental Footprint Assessment of Methylene Blue Photodegradation using Graphene-based Titanium Dioxide
To date, photocatalysis has received much attention in terms of the degradation of organic pollutants in wastewater. Various studies have shown that graphene-based photocatalysts are one of the impressive options owing to their intriguing features, including high surface area, good conductivity, low recombination rate of electron-hole pair, and fast charge separation and transfer. However, the environmental impacts of the photocatalysts synthesis and their photodegradation activity remain unclear. Thus, this report aims to identify the environmental impacts associated with the photodegradation of methylene blue (MB) over reduced graphene oxide/titanium oxide photocatalyst (TiO2/rGO) using Life Cycle Assessment (LCA). The life cycle impacts were assessed using ReCiPe 2016 v1.1 midpoint method, Hierachist version in Gabi software. A cradle-to-gate approach and a functional unit of 1 kg TiO2/rGOwere adopted in the study. Several important parameters, such as the solvent type (ultrapure water, ethanol, and isopropanol), with/without silver ion doping, and visible light power consumption (150, 300, and 500 W) were evaluated in this study. In terms of the selection of solvent, ultrapure water is certainly a better choice since it contributed the least negative impact on the environment. Furthermore, it is not advisable to dope the photocatalyst with silver ions since the increment in performance is insufficient to offset the environmental impact that it caused. The results of different power of visible light for MB degradation showed that the minimum power level, 150 W, could give a comparable photodegradation efficiency and better environmental impacts compared to higher power light sources. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Disodium 4,4′-oxydibenzoate
The crystal structure of the title compound, 2Na+·C14H8O5
2−, consists of alternating layers of sodium cations and 4,4′-oxydibenzoate anions; the layers are perpendicular to the a axis, with the distance between the layers of cations (or anions) being half this axial length. The Na atoms are disordered over three sites [occupancies 0.775 (4), 0.781 (6) 0.444 (6)]
3-(2-AminoÂethyl)-2-anilinoquinazolin-4(3H)-one methanol hemisolvate
The title methanol hemisolvated quinazolin-(3H)-one, C16H16N4O·0.5CH3OH, has an anilino substituent in the 2-position and an aminoÂethyl substituent in the 3-position of the planar fused-ring system (r.m.s. deviation = 0.019 Å). The anilino N atom donates an intramolecular hydrogen bond to the aminoÂethyl N atom. The molÂecule and the solvent methanol molÂecule are linked by N—H⋯N, N—H⋯O and O—H⋯O hydrogen bonds. The methanol molÂecule is disordered over two equally occupied positions about a twofold rotation axis
Perillartine
The chiral title compound [systematic name: 4-(1-methylÂvinyl)cycloÂhexene-1-carbaldehyde oxime], C10H15NO, crystallizes with two molÂecules in the asymmetric unit, one of which shows disorder of its propenyl substituent over two sets of sites in a 50:50 ratio. In both molÂecules, the six-membered carbaldehyde oxime ring adopts an approximate envelope conformation in which the C atom bearing the propenyl substituent represents the flap position. In both molÂecules, the plane passing through the propenyl substituent is nearly perpendicular to the mean plane of the six-membered ring [dihedral angles = 84.6 (6) and 87.4 (3)°]. In the crystal, the two independent molÂecules are linked by a pair O—H⋯N hydrogen bonds across a pseudo-inversion centre, generating a dimer. The unit cell of the known racemate of the title compound is similar to the cell found here, but with space group P
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