The comment by David Eltis, Frank Lewis, and David Richardson brings to the fore issues about productivity growth in slave-based economies, and about broader interpretations of those societies and their successor economies. Their assessment confirms that prices derived from probate inventories behaved like those derived from market transactions, suggesting that rich data available in probate in...

OBJECTIVE To evaluate the clinical and economic impact of a novel postoperative pathway following posterior spinal fusion (PSF) in patients with adolescent idiopathic scoliosis (AIS). METHODS Patient charts were reviewed for demographic data and to determine length of surgery, implant density, use of osteotomies, estimated blood loss, American Society of Anesthesiologists (ASA) score, length ...

OBJECTIVE The aim of this study was to compare the outcomes of dorsal onlay urethroplasty using buccal mucosa graft (BMG) versus penile skin flap (PSF) in the repair of long anterior urethral strictures. MATERIAL AND METHODS Patients with long anterior urethral strictures were randomized to receive either dorsal onlay BMG urethroplasty or PSF urethroplasty. All patients were evaluated preoper...

Measured and modeled point spread functions (PSF) of sensor systems indicate that a significant portion of the recorded signal of each pixel of a satellite image originates from outside the area represented by that pixel. This hinders the ability to derive surface information from satellite images on a per-pixel basis. In this study, the impact of the PSF of the Moderate Resolution Imaging Spec...

Background. Poststroke fatigue (PSF) is a frequent, disabling symptom that lacks a consensual definition and a standardized evaluation method. The (multiple) causes of PSF have not been formally characterized. Objective. To identify factors associated with PSF. Method. A systematic review of articles referenced in MEDLINE. Only original studies having measured PSF and potentially associated fac...

This paper describes experiences gained while adding processor sharing capabilities to the ARCADE distributed system. The goal of a processor sharing facility (PSF) is to allow busy users to take advantage of cycles available on idle processors, which are typically plentiful in a network of individually-owned machines. Several researchers have reported positive experiences with implementing a P...