[The Connection between Objective and Subjective Attributions of a Migration Background with Perceived Discrimination and Racism]. / Der Zusammenhang zwischen objektiven und subjektiven Zuschreibungen eines Migrationshintergrundes mit wahrgenommener Diskriminierung und Rassismus.

BACKGROUND: The criteria-oriented assessment of the population with a migration background that is common in Germany is currently being criticized from a social science and methodological perspective, among others. In particular, its usefulness as an indicator of perceived discrimination against the population with a migration background can be critically questioned based on the current state of research METHOD: Based on a population-representative data set (N=1,989) for the city of Berlin, the subjective perception of a migration background based on self-attribution and anticipated external attribution of a migration background was recorded in addition to the objective assessment of a migration background. Furthermore, socio-demographic and migration-specific characteristics as well as perceived discrimination were assessed. Using descriptive and inferential statistical methods, differences between the objective and subjective assessment of a migration background and their relationship with perceived discrimination were analyzed. RESULTS: Less than half (38%, 154/400) of the respondents identified as having a migrant background using the criterion-oriented approach reported describing themselves as migrants. 36% (144/405) reported that they believed that others in Germany described them as a person with a migrantion background. Respondents with a migration background are significantly more likely to experience discrimination on grounds of skin color, religion or country of origin compared to respondents without a migration background. Furthermore, it was found that both the self-attribution and the anticipated attribution by others as a migrant are positively associated with experiences of discrimination and racism. DISCUSSION: The results suggest that migration-sensitive research should not simply differentiate between people with and without a migration background according to official criteria. Rather, the subjective perceptions of one's own attribution as a migrant seem more suitable as indicators of discrimination and should be taken into account in future research or surveys on experiences of discrimination.

Flow-Matching: Efficient Coarse-Graining of Molecular Dynamics without Forces.

Coarse-grained (CG) molecular simulations have become a standard tool to study molecular processes on time and length scales inaccessible to all-atom simulations. Parametrizing CG force fields to match all-atom simulations has mainly relied on force-matching or relative entropy minimization, which require many samples from costly simulations with all-atom or CG resolutions, respectively. Here we present flow-matching, a new training method for CG force fields that combines the advantages of both methods by leveraging normalizing flows, a generative deep learning method. Flow-matching first trains a normalizing flow to represent the CG probability density, which is equivalent to minimizing the relative entropy without requiring iterative CG simulations. Subsequently, the flow generates samples and forces according to the learned distribution in order to train the desired CG free energy model via force-matching. Even without requiring forces from the all-atom simulations, flow-matching outperforms classical force-matching by an order of magnitude in terms of data efficiency and produces CG models that can capture the folding and unfolding transitions of small proteins.

Boltzmann generators: Sampling equilibrium states of many-body systems with deep learning.

Computing equilibrium states in condensed-matter many-body systems, such as solvated proteins, is a long-standing challenge. Lacking methods for generating statistically independent equilibrium samples in "one shot," vast computational effort is invested for simulating these systems in small steps, e.g., using molecular dynamics. Combining deep learning and statistical mechanics, we developed Boltzmann generators, which are shown to generate unbiased one-shot equilibrium samples of representative condensed-matter systems and proteins. Boltzmann generators use neural networks to learn a coordinate transformation of the complex configurational equilibrium distribution to a distribution that can be easily sampled. Accurate computation of free-energy differences and discovery of new configurations are demonstrated, providing a statistical mechanics tool that can avoid rare events during sampling without prior knowledge of reaction coordinates.

Double-slit photoelectron interference in strong-field ionization of the neon dimer.

Wave-particle duality is an inherent peculiarity of the quantum world. The double-slit experiment has been frequently used for understanding different aspects of this fundamental concept. The occurrence of interference rests on the lack of which-way information and on the absence of decoherence mechanisms, which could scramble the wave fronts. Here, we report on the observation of two-center interference in the molecular-frame photoelectron momentum distribution upon ionization of the neon dimer by a strong laser field. Postselection of ions, which are measured in coincidence with electrons, allows choosing the symmetry of the residual ion, leading to observation of both, gerade and ungerade, types of interference.

Child neurodevelopment and mental health after surgical ventricular septal defect repair: risk and protective factors.

AIM: This case-control study examined the long-term consequences of surgical correction for ventricular septal defect (VSD; the most common congenital heart defect) in infancy. It assessed children who had undergone VSD surgery and the factors related to maternal conditions, surgery, and hospital stay. METHOD: Thirty-nine children (23 females, 16 males; age range 6y 1mo-9y 7mo [mean 7y 4mo, SD 1y]) with repaired isolated, non-syndromic, non-genetic VSD were compared with 39 typically developing children (22 females, 17 males; age range 6y-9y 2mo [mean 7y 3mo, SD 10mo]). The children completed behavioural tests of neurodevelopment and a quality of life (QoL) questionnaire. Mothers rated children's emotional/behavioural symptoms and QoL. Measures of maternal parenting behaviour and psychopathology were treated as moderators. RESULTS: Affected children showed reduced language skills (p=0.002) unless mothers reported high parenting behaviour subscale scores (p=0.04). Children's anxiety symptoms were elevated when mothers had anxiety symptoms (p=0.01). Longer hospital stay was associated with lower intelligence (p=0.003) and psychomotor scores (p=0.006). Longer scars predicted elevated child anxiety (p=0.008), and age at surgery and QoL were inversely related (p=0.01). INTERPRETATION: Impairments could be mitigated if VSD repair was performed early in life with a relatively small scar and uncomplicated hospital stay. This outcome depends on maternal parenting behaviour and anxiety symptoms. WHAT THIS PAPER ADDS: Children's cognitive and psychomotor development after surgical ventricular septal defect repair was unimpaired. Children showed no mental health restrictions when their mothers reported few anxiety symptoms themselves. Language impairments might be preventable by pro-active parenting. The outcome also depends on variables related to surgery and hospital stay.

Long-term Associations of an Early Corrected Ventricular Septal Defect and Stress Systems of Child and Mother at Primary School Age.

INTRODUCTION: Ventricular septal defect (VSD) is the most common congenital heart defect, with larger VSDs typically being corrected with an open-heart surgery during infancy. Long-term consequences of a VSD-corrective surgery on stress systems of child and mother are still unknown. The aim of the present study is to investigate the associations of an early corrected VSD and diurnal cortisol release of child and mother. METHODS: 26 children (12 boys) between 6 and 9 years old, who underwent surgery for an isolated VSD within the first 3 years of life, and their mothers participated in the study. Their diurnal cortisol profiles were compared to a sex-, age-, and socioeconomic status-matched healthy control group. Within the VSD group, associations between cortisol and characteristics of surgery and hospitalization were investigated. Child and mother psychopathological symptoms were considered as a possible interfering mechanism of altered cortisol profiles. RESULTS: Diurnal cortisol profiles of children with an early corrected VSD did not differ from those of controls. However, mothers of affected children exhibited higher cortisol levels in the morning (p < 0.001, [Formula: see text]) and a steeper diurnal cortisol slope (p = 0.016, [Formula: see text]) than mothers of healthy children. CONCLUSION: Results indicate a favorable development of children with an early corrected VSD, in terms of comparable diurnal cortisol profiles with healthy controls, according to a comparable mother-rated psychopathology. Mothers of affected children reveal altered diurnal cortisol levels, without differences in self-rated psychopathology. This divergence should be clarified in future research.