Howard University

Constraints on the Loss of Hydroperoxymethyl Thioformate (HPMTF) to Marine Clouds Using Aircraft Observations

Abstract The photochemical oxidation of dimethyl sulfide (DMS) by the hydroxyl radical (OH) contributes to the production and growth of particles and cloud condensation nuclei in the marine boundary layer (MBL). DMS oxidized by OH can go on to form a stable intermediate, hydroper...

A polyphyodont, semiaquatic eutriconodontan mammal from the Early Cretaceous of China

Diphyodonty (the presence of two generations of teeth) characterizes extant mammals and has long been regarded as pivotal to the evolution of other mammalian traits, including precise occlusion and determinate growth. Nevertheless, our understanding of the pattern of dental repla...

Equation Disagreement as a Zero-Cost Uncertainty Signal for LDL-C Classification: An Interpretable Regime-Aware Calibration Model Rescues Misclassification at Treatment Thresholds.

BACKGROUND: Three LDL cholesterol (LDL-C) estimation equations (Friedewald, Sampson/NIH, and Martin-Hopkins) can be calculated from every standard lipid panel, yet laboratories typically report only one. We tested whether disagreement identifies misclassification risk at clinical...

Loneliness and all-cause mortality in the United States

Importance Loneliness affects more than half of US adults and has been declared a public health epidemic, yet whether clinically documented loneliness independently predicts mortality across diverse populations remains unclear. Objective To examine the association between clinica...

Machine Learning-Guided Strategy Selection and Condition Prediction for Photoredox Catalysis

Abstract Photoredox catalysis offers powerful opportunities for organic synthesis, yet its broader application remains limited by the difficulty of identifying viable synthetic routines and conditions. Here, we present an experimentally validated, machine-learning-assisted workfl...

Green spaces, new faces: place marketing and neighborhood change. A case study of the Atlanta Beltline

Purpose This study aims to examine how green space references in online real estate listings operate as signals of status and sustainability in gentrifying urban neighborhoods. It situates marketplace behavior within a longer historical trajectory of racialized urban policy, infr...

Cervical cancer prevention and control strategy in Ethiopia: key informant clinicians’ perspective

Abstract Background: Cervical cancer is a major public health burden in Ethiopia, ranking second among women and disproportionately affecting HIV-positive individuals. In 2020, an estimated 7,445 new cases and 5,338 deaths occurred. Thus, accurate diagnosis, treatment, and pallia...

Extended Antibiotic Prophylaxis Is Not Associated with Improved Outcomes after Traumatic Neck Aerodigestive Repair

Background: Extended post antibiotics do not reduce infectious complications after traumatic facial injuries or elective clean-contaminated head and neck operation. However, the optimal duration of antibiotic prophylaxis following operative repair of traumatic neck aerodigestive...

School District Financial Debt Through the Lens of Critical School Finance

Abstract This article applies Critical School Finance theory to analyze the $543.9 billion in U.S. school district debt as a mechanism of racialized wealth extraction. Using the framework’s five core concepts—dispossession, kleptocracy, extraction/super-expropriation, racial capi...