31 research outputs found
Degree of polarization and quantum-mechanical purity
The purity parameter is used in quantum mechanics to discriminate
pure states from mixed states. We employ this concept to define a
degree of polarization for general, three-dimensional, classical
random electric fields. Our approach leads to a result that is
identical with a recent definition obtained by a decomposition of
the polarization matrix in terms of the Gell-Mann matrices. We
also give an expression for this degree of polarization based on
the constituent two-dimensional subsystems
A global point prevalence survey of antimicrobial use in neonatal intensive care units: The no-more-antibiotics and resistance (NO-MAS-R) study
Background: Global assessment of antimicrobial agents prescribed to infants in the neonatal intensive care unit (NICU) may inform antimicrobial stewardship efforts. Methods: We conducted a one-day global point prevalence study of all antimicrobials provided to NICU infants. Demographic, clinical, and microbiologic data were obtained including NICU level, census, birth weight, gestational/chronologic age, diagnoses, antimicrobial therapy (reason for use; length of therapy), antimicrobial stewardship program (ASP), and 30-day in-hospital mortality. Findings: On July 1, 2019, 26 of infants (580/2,265; range, 0�100; median gestational age, 33 weeks; median birth weight, 1800 g) in 84 NICUs (51, high-income; 33, low-to-middle income) from 29 countries (14, high-income; 15, low-to-middle income) in five continents received �1 antimicrobial agent (92, antibacterial; 19, antifungal; 4, antiviral). The most common reasons for antibiotic therapy were �rule-out� sepsis (32) and �culture-negative� sepsis (16) with ampicillin (40), gentamicin (35), amikacin (19), vancomycin (15), and meropenem (9) used most frequently. For definitive treatment of presumed/confirmed infection, vancomycin (26), amikacin (20), and meropenem (16) were the most prescribed agents. Length of therapy for culture-positive and �culture-negative� infections was 12 days (median; IQR, 8�14) and 7 days (median; IQR, 5�10), respectively. Mortality was 6 (42, infection-related). An NICU ASP was associated with lower rate of antibiotic utilization (p = 0·02). Interpretation: Global NICU antibiotic use was frequent and prolonged regardless of culture results. NICU-specific ASPs were associated with lower antibiotic utilization rates, suggesting the need for their implementation worldwide. Funding: Merck & Co.; The Ohio State University College of Medicine Barnes Medical Student Research Scholarship © 2021 The Author
MeCP2 and the enigmatic organization of brain chromatin. Implications for depression and cocaine addiction
Voter Perceptions of Candidates Who Reject PAC Contributions
In the project, we examine how rejecting PAC contributions affects voter perceptions of candidates
Sampling expansions for three-dimensional light amplitude distribution in the vicinity of an axial image point: reply to comment
Voice Recognition and In-Car Communication Testing Procedures and Performance Parameters
Respiratory syncytial virus: current and emerging treatment options
Tiffany L Turner,1 Benjamin T Kopp,1 Grace Paul,1 Lindsay C Landgrave,2 Don Hayes Jr,1 Rohan Thompson11Department of Pediatrics, Ohio State University College of Medicine, 2Clinical Pharmacy, Nationwide Children's Hospital, Columbus, OH, USAAbstract: Respiratory syncytial virus (RSV) is an important respiratory pathogen in infants and children worldwide. Although RSV typically causes mild upper respiratory infections, it frequently causes severe morbidity and mortality, especially in premature infants and children with other chronic diseases. Treatment of RSV is limited by a lack of effective antiviral treatments; however, ribavirin has been used in complicated cases, along with the addition of intravenous immune globulin in specific patients. Vaccination strategies for RSV prevention are heavily studied, but only palivizumab (Synagis®) has been approved for use in the United States in very select patient populations. Research is ongoing in developing additional vaccines, along with alternative therapies that may help prevent or decrease the severity of RSV infections in infants and children. To date, we have not seen a decrement in RSV morbidity and mortality with our current options; therefore, there is a clear need for novel RSV preventative and therapeutic strategies. In this review, we discuss the current and evolving trends in RSV treatment for infants and children.Keywords: bronchiolitis, lower respiratory tract infection, respiratory syncytial virus, probiotics, vitamin