Luminous quasars at the redshift frontier z > 7 serve as stringent probes of super-massive black hole (SMBH) formation and they are thought to undergo much of their growth obscured by dense gas and dust in their host galaxies. Fully characterizing the symbiotic evolution of SMBHs and hosts requires rest-frame optical observations that span spatial scales from the broad-line region (BLR) to the interstellar and circumgalactic medium (ISM and CGM). The James Webb Space Telescope (JWST) now provides the necessary spatially resolved spectroscopy to do so. However, the physical conditions that regulate the interplay between SMBHs and their hosts at the highest redshifts, especially the nature of early feedback phases, remain unclear. We present JWST/NIRSpec integral field unit (IFU) observations of J0313-1806 at z = 7.64, the most distant luminous quasar known. From the rest-frame optical spectrum of the unresolved quasar, we derived a black hole mass of M-BH = (1.63 +/- 0.10)& times;10(9) M-circle dot based on H beta lambda 4861 (H beta) and an Eddington rate of lambda = L/L-Edd = 0.80 +/- 0.05, consistent with previous Mg II lambda 2800-based estimates. J0313-1806 exhibits no detectable [O III] lambda lambda 4959, 5007 emission on nuclear scales (3 sigma upper limit equivalent width of [O III] lambda 5007 < 1.42 & Aring;). Most remarkably, we did detect an ionized gas shell extending out to similar to 1.8 kpc traced by H beta emission that also lacks any significant [O III] lambda lambda 4959, 5007, with a 3 sigma upper limit on the [O III] lambda 5007 to H beta flux ratio of log(10)(F([O III])/F(H beta)) = -1.15. Through photoionization modeling, we demonstrate that the extended emission is consistent with a thin, clumpy outflowing shell where [O III] is collisionally de-excited by dense gas. We interpret this structure as a fossil remnant of a recent blowout phase, providing evidence for episodic feedback cycles in one of the earliest quasars. These findings suggest that dense ISM phases may play a crucial role in shaping the spectral properties of quasars across cosmic time.
Using the lens of activity-based workspace design, we develop a model of the hybrid workspace (i.e. the organizational and home settings in which hybrid work occurs) which proposes that each setting has three core activity-supportive characteristics: interaction-supportive, concentration-supportive and recovery-supportive. Drawing on a two-wave data set collected from office-based employees in an engineering organization, we test and find support for our hypotheses that activity-supportive workspace characteristics (in oth organizational/office and home settings) foster employee outcomes, i.e. task performance, engagement and workspace satisfaction. Specifically, we find that office recovery-supportive characteristics increased task performance, office interaction-supportive characteristics increased satisfaction with the office workspace, and that home concentration-supportive workspace characteristics increased employee engagement. Conclusions are drawn for our understanding of workspace design and hybrid working.
Discontent and dissatisfaction with democracy are often associated with the perception of corruption, especially in Latin American settings. Since the literature shows that people develop democratic values independently of their interaction with democratic institutions and they arrive at conclusions that are consistent with their beliefs, we explore the association between diffuse and specific support for democracy and the perception of corruption. Using seven waves of LAPOP surveys for Chile (2006-2023), we show that diffuse support (support for the political system) and specific support (satisfaction with democracy) for democracy are negatively associated with perceived corruption among public officials and politicians. We find no moderation by ideological affinity with the government. Individuals who do not place themselves on the left-right scale are more likely to perceive corruption. Results are consistent with motivated reasoning: democratic values and evaluations shape how people interpret information about corruption.
Accurate measurement of household composition is fundamental for research on social indicators of well-being, including happiness, work–life balance, and the gender pay gap. In large-scale cross-national surveys, such as the International Social Survey Programme (ISSP), household composition is typically measured using a group design, where respondents distribute household members across three age categories—toddlers (0–5 years), children (6–17 years), and adults (18 + years). When implemented without interviewer assistance, this group design has produced item nonresponse rates as high as 35
Background: Women with breast cancer (BC) experience metabolic changes during cancer treatment, such as weight gain and alterations in serum lipid profiles, which increase the risk of cancer recurrence and mortality. Aim: This study aimed to evaluate the effectiveness of a pilot study based on diet intervention on serum lipid profile and nutritional status in BC women. Methods: A pilot randomized study was conducted with 16 women (age 52.1 +/- 3.3 years) diagnosed with BC, randomly assigned in intervention group (n=8) or a control group (n=8). The intervention group received a personalized diet therapy adjusted to energy requirements for 4 months. Anthropometric measurements (body weight, height, waist circumference, and body fat), biochemical measurements (serum lipid profile), and dietary assessment were performed. Results: At baseline, 54.5% of the women had excess weight and body fat, and 72.7% presented abdominal obesity. Additionally, 34.6% had elevated total cholesterol, and 45.5% had elevated triglycerides. The intervention group significantly increased dietary protein percentage (ANOVA 0.008), vegetable consumption (ANOVA 0.031), and fruit consumption (ANOVA 0.043), and cereal intake decreased (ANOVA 0.001). No significant differences were found between pre-and post-intervention groups on nutritional status and lipid profile. Conclusion: A pilot randomized study based on diet intervention can improve diet profile in BC women; no significant differences were found on the serum lipid profile and nutritional status; however, further studies are needed to verify the effects of a diet intervention.
