BACKGROUND Dominant frequency (DF) analysis of videocapsule endoscopy images is a new method to detect small intestinal periodicities that may result from mechanical rhythms such as peristalsis. Longer periodicity is related to greater image texture at areas of villous atrophy in celiac disease. However, extraneous features and spatiotemporal phase shift may mask DF rhythms. METHOD The robust...

A strategy of user ordering and time labeling for a decision feedback (DF) detector in asynchronous code-division multiple-access communications is proposed and is proved to be optimal for the ideal DF detector. The proposed algorithm requires ( ) offline operations, where is the number of users. Although error propagation complicates the analysis of the actual DF detector, computer simulations...

1 Movement Disorders Section, Neurology Unit, Hospital de Base do Distrito Federal, Brası́lia, DF, Brazil 2 Neuroradiology Section, Clı́nica Villas Boas, Brası́lia, DF, Brazil 3 Neuroscience and Behaviour Laboratory, Institute of Biology, University of Brası́lia, DF, Brazil 4 Sherbrooke Connectivity Imaging Lab, Université de Sherbrooke, Sherbrooke, Québec, Canada 5 Imeka Inc, 3000 boul. de l‘Unive...

This paper presents a feature constraint system that, compared with the well-known systems OSFF1] and CFTT5], incorporates several interesting characteristics. The new system, called DF, is naturally extended through the CLP scheme (in combination with a dynamic completion technique) to a logic language equally called DF. 1 The DF feature constraint system adopted the F-logic's 4] declarative s...

Dietary fiber (DF), found in whole fruits, vegetables, and whole grains (WG), is considered a nutrient of concern in the US diet and increased consumption is recommended. The present study was designed to highlight this critical importance of the difference between WG, high-fiber WG, and sources of fiber that are not from WG. The study is based on the two-day diets reported consumed by the nati...

Level curves higher than 100 m of the Gardon basin are analysed using scale relativity tools. These curves depend explicitly on scale (box counting method) and altitude. This dependence is solution of a partial derivative equation (in terms of scale and position). Then the descriptions in terms of scale invariance (constant fractal dimension DF ) are generalized to scale covariance (variable DF...

Despite Leonardo da Vinci's observation (circa 1511) that "the atria or filling chambers contract together while the pumping chambers or ventricles are relaxing and vice versa," the dynamics of four-chamber heart function, and of diastolic function (DF) in particular, are not generally appreciated. We view DF from a global perspective, while characterizing it in terms of causality and clinical ...

Let f : Y → Z with Y ⊆ XI := Πi∈I Xi. Then (a) J ⊆ I is essential if there are x, y ∈ Y such that d(x, y) = J and f(x) 6= f(y), where d(x, y) := {i ∈ I : xi 6= yi}; Jf := {i : {i} is essential}; an essential J is optimally essential if no essential J ′ ⊆ J satisfies |J ′| < |J |; J ∈ Jf if J is a maximal family of pairwise disjoint optimally essential sets; λf := sup{|J | : J ∈ Jf}. (b) f depen...

The Ames dwarf mouse transmits a recessive mutation (df) resulting in a profound anterior pituitary hypocellularity due to a general lack of thyrotropes, somatotropes and lactotropes. These cell types are also dependent on the pituitary-specific transcription factor, Pit-1. We present evidence that expression of Pit-1 and limited commitment to these cells lineages occurs in df/df pituitaries. T...

In auditory cortex of the mustached bat, the FF (F means frequency modulation), dorsal fringe (DF), and ventral fringe (VF) areas consist of "combination-sensitive" neurons tuned to the pair of an emitted biosonar pulse and its echo with a specific delay (best delay: BD). The DF and VF areas are hierarchically at a higher level than the FF area. Focal electric stimulation of the FF area evokes ...