INTRODUCTION The diagnostic difficulties of brucellosis makes the evaluation of new diagnostic tests necessary. OBJECTIVES Evaluation of different commercial tests in the serological diagnosis of brucellosis by ELISA and immunocapture antibodies in a clinical series of patients with brucellosis of the Health Network of the Catholic University of Chile. METHODS All the serums received in the...

The translation from finite CSPs into SAT has been studied intensively. Common encodings for variable domains are the compact, direct and order encoding. The direct encoding needs a quadratic number of clauses for encoding a domain in SAT whereas the order encoding uses only linearly many. We introduce a conversion for domains from the direct encoding to the order encoding on the CNF level by e...

This paper demonstrates that P ≠ RP. The way was to generalize the traditional definitions of the classes P and RP, to construct an artificial problem (Maj2/3-XG-SAT) and then to demonstrate that it is in RP but not in P (where the classes P and RP are generalized and called too simply P and RP in this paper, and then it is explained why the traditional classes P and RP should be fixed and repl...

Background. The Self-Assessment of Treatment version II (SAT II) measures treatment-related improvements in pain and impacts and impressions of treatment in neuropathic pain patients. The measure has baseline and follow-up versions. This study assesses the measurement properties of the SAT II. Methods. Data from 369 painful diabetic peripheral neuropathy (PDPN) patients from a phase III trial a...

This paper presents a CNF SAT-formulae transformation technique employing Gröbner bases as a means to analyze the problem structure. Gröbnerbases have been applied in the past for SAT; however, their use was primarily restricted to analyzing entire problems for proof-refutation. In contrast, this technique analyzes limited subsets of problems, and uses the derived Gröbner bases to yield new con...

Description of a polynomial time reduction of SAT to 2-SAT of polynomial size.

The Operational Land Imager (OLI) on Landsat-8 represents a generational change from heritage Landsat instruments in its design, while it maintains data continuity with the 40+ year Landsat data archive. It preserves the 30-m ground sample distance, 185-km swath width and VIS/NIR/SWIR spectral bands. Furthermore, data continuity resulted from extensive pre-launch and on-orbit calibration and ch...

The Landsat-8 Operational Land Imager (OLI) was radiometrically calibrated prior to launch in terms of spectral radiance, using an integrating sphere source traceable to National Institute of Standards and Technology (NIST) standards of spectral irradiance. It was calibrated on-orbit in terms of reflectance using diffusers characterized prior to launch using NIST traceable standards. The radian...

This paper discusses the pre-launch spectral characterization of the Operational Land Imager (OLI) at the component, assembly and instrument levels and relates results of those measurements to artifacts observed in the on-orbit imagery. It concludes that the types of artifacts observed and their magnitudes are consistent with the results of the pre-launch characterizations. The OLI in-band resp...

The theory of hierarchical Boolean satisfiability (SAT) solving proposed in this paper is based on a strict axiomatic system and introduces a new important notion of implicativity. The theory makes evident that increasing implicativity is the core of SAT-solving. We provide a theoretical basis for increasing the implicativity of a given SAT instance and for organizing SAT-solving in a hierarchi...