Phased Array Feed Calibration, Beamforming and Imaging

Phased array feeds (PAFs) for reflector antennas offer the potential for increased reflector field of view and faster survey speeds. To address some of the development challenges that remain for scientifically useful PAFs, including calibration and beamforming algorithms, sensitivity optimization, and demonstration of wide field of view imaging, we report experimental results from a 19 element room temperature L-band PAF mounted on the Green Bank 20-Meter Telescope. Formed beams achieved an aperture efficiency of 69% and system noise temperature of 66 K. Radio camera images of several sky regions are presented. We investigate the noise performance and sensitivity of the system as a function of elevation angle with statistically optimal beamforming and demonstrate cancelation of radio frequency interference sources with adaptive spatial filtering.Comment: 19 pages, 13 figure

A baseline assessment of antimicrobial stewardship core element implementation in selected public hospitals in Malawi: findings from the 2023 National Program Audit

Antimicrobial resistance (AMR) is a significant global health challenge, particularly in low- and middle-income countries (LMICs). In Malawi, frequent stockouts of essential medicines and the widespread dispensing of antibiotics without prescriptions have exacerbated the AMR burden, highlighting the urgent need for robust antimicrobial stewardship (AMS) interventions. This study presents the first documented baseline assessment of AMS core elements across six public healthcare facilities within Malawi’s AMR sentinel surveillance network. Understanding the baseline status of AMS implementation provides a critical reference point to guide future interventions, inform policy, and prioritize resources in the national response to AMR. This descriptive analysis used data from a national AMS program audit conducted from July 10–14, 2023, in six public hospitals: Malamulo Adventist Hospital, Mzimba South District Hospital, Kamuzu Central Hospital, Queen Elizabeth Central Hospital, Zomba Central Hospital, and Mzuzu Central Hospital. The World Health Organization (WHO) Healthcare Facility AMS Assessment Tool was used to evaluate implementation across key AMS domains, including leadership, accountability, stewardship actions, education, monitoring, surveillance, and reporting. A total of 30 AMS committee members participated using a consensus-based approach. Of the six hospitals assessed, only one (Kamuzu Central Hospital) demonstrated strong implementation of AMS core elements, achieving a score of 79%. The remaining facilities reported moderate to low performance, with Mzimba District Hospital scoring the lowest (24%). Leadership commitment was inconsistent; only one (16.7%) hospital had fully integrated AMS into its annual plans, and resource allocation was limited. AMS ward rounds and antibiotic prescription audits were either absent or only partially implemented across most facilities. Education and training initiatives were fragmented, with only one (16.7%) hospital partially integrating AMS into staff induction. This situational analysis reveals critical gaps in AMS implementation across Malawi’s national AMR surveillance hospitals. Limited leadership commitment, infrequent AMS ward rounds, and inconsistent education for healthcare workers were major barriers. Targeted interventions are needed to strengthen leadership, establish feasible facility-level AMS actions, and build sustainable capacity among healthcare workers

A baseline assessment of antimicrobial stewardship core element implementation in selected public hospitals in Malawi: findings from the 2023 National Program Audit

BackgroundAntimicrobial resistance (AMR) is a significant global health challenge, particularly in low- and middle-income countries (LMICs). In Malawi, frequent stockouts of essential medicines and the widespread dispensing of antibiotics without prescriptions have exacerbated the AMR burden, highlighting the urgent need for robust antimicrobial stewardship (AMS) interventions. This study presents the first documented baseline assessment of AMS core elements across six public healthcare facilities within Malawi’s AMR sentinel surveillance network. Understanding the baseline status of AMS implementation provides a critical reference point to guide future interventions, inform policy, and prioritize resources in the national response to AMR.Materials and methodsThis descriptive analysis used data from a national AMS program audit conducted from July 10–14, 2023, in six public hospitals: Malamulo Adventist Hospital, Mzimba South District Hospital, Kamuzu Central Hospital, Queen Elizabeth Central Hospital, Zomba Central Hospital, and Mzuzu Central Hospital. The World Health Organization (WHO) Healthcare Facility AMS Assessment Tool was used to evaluate implementation across key AMS domains, including leadership, accountability, stewardship actions, education, monitoring, surveillance, and reporting. A total of 30 AMS committee members participated using a consensus-based approach.ResultsOf the six hospitals assessed, only one (Kamuzu Central Hospital) demonstrated strong implementation of AMS core elements, achieving a score of 79%. The remaining facilities reported moderate to low performance, with Mzimba District Hospital scoring the lowest (24%). Leadership commitment was inconsistent; only one (16.7%) hospital had fully integrated AMS into its annual plans, and resource allocation was limited. AMS ward rounds and antibiotic prescription audits were either absent or only partially implemented across most facilities. Education and training initiatives were fragmented, with only one (16.7%) hospital partially integrating AMS into staff induction.ConclusionThis situational analysis reveals critical gaps in AMS implementation across Malawi’s national AMR surveillance hospitals. Limited leadership commitment, infrequent AMS ward rounds, and inconsistent education for healthcare workers were major barriers. Targeted interventions are needed to strengthen leadership, establish feasible facility-level AMS actions, and build sustainable capacity among healthcare workers

[In libros Codicis Justiniani VI ad XII additiones] [Manuscrito]

Copia digital : Biblioteca de Castilla-La Mancha, 2015Caja de escritura: 28 x 11 cmReclamos, encabezamientos y títulos al marge

D.D. Ludovici de Molina ... De primogeniorum hispanorum origine ac natura libri quatuor /

2 ej. de la misma obraAntep.Marca tip. xil. en port. a dos tintasTexto a dos col.Portadilla en liber tertiusCCPB000224474-8BHR/B-049-230.BHR/B-050-067.BHR/B-050-067.Hol.PielFDH 37589FDH 29642Hª Derecho/N-131 (B)Hª Derecho/N-131 (A