Topic
Transitional Region
About: Transitional Region is a research topic. Over the lifetime, 41 publications have been published within this topic receiving 1411 citations.
Papers
4 Oct 2004
TL;DR: A key finding is that for radios using narrow-band modulation, the transitional region is not an artifact of the radio non-ideality, as it would exist even with perfect-threshold receivers because of multi-path fading.
Abstract: The wireless sensor networks community, has now an increased understanding of the need for realistic link layer models. Recent experimental studies have shown that real deployments have a "transitional region" with highly unreliable links, and that therefore the idealized perfect-reception-within-range models used in common network simulation tools can be very misleading. In this paper, we use mathematical techniques from communication theory to model and analyze the low power wireless links. The primary contribution of this work is the identification of the causes of the transitional region, and a quantification of their influence. Specifically, we derive expressions for the packet reception rate as a function of distance, and for the width of the transitional region. These expressions incorporate important channel and radio parameters such as the path loss exponent and shadowing variance of the channel; and the modulation and encoding of the radio. A key finding is that for radios using narrow-band modulation, the transitional region is not an artifact of the radio non-ideality, as it would exist even with perfect-threshold receivers because of multi-path fading. However, we hypothesize that radios with mechanisms to combat multi-path effects, such as spread-spectrum and diversity techniques, can reduce the transitional region.
1,013 citations
Patent•
19 Dec 2001
TL;DR: In this paper, an improved method for display of a transitional region of interest while transitioning between a first region and a second region within visual information on a display screen of a computer is presented.
Abstract: An improved method for display of a transitional region of interest while transitioning between a first region of interest and a second region of interest within visual information on a display screen of a computer. The method comprising the steps of applying a transitional transformation to the visual information and displaying the transitional transformed visual information on the display screen. The transitional transformation requiring a reduced calculation for transforming the visual information in the transitional region.
66 citations
TL;DR: Analysis of electrical properties of cultured mouse thioglycollate-induced peritoneal macrophages indicated that the inward rectification and the negative resistance region probably result from a voltage-dependent potassium conductance.
Abstract: The electrical properties of cultured mouse thioglycollate-induced peritoneal macrophages were investigated using intracellular recording techniques. Thirty-five percent of the cells studied had membrane potentials ranging from -65 to -95 mV and exhibited S-shaped, steady-state current-voltage (I-V) relationships containing a transitional region. Analysis of currents in the transitional region from the rate of rise and fall of the voltage responses to current pulses indicated the presence of a negative resistance region in this area. Tetrodotoxin (3 × 10(-5) M), cobalt chloride (3 mM), 4-aminopyridine (4 mM), and tetraethylammonium chloride (8 mM) did not eliminate the transitional region of the I-V curves, whereas addition of barium chloride (4 mM) and rubidium chloride (3 mM) did. Increasing the external concentration of potassium shifted the I-V relationship horizontally along the current axis but did not eliminate the transitional region. These data indicate that the inward rectification and the negative resistance region probably result from a voltage-dependent potassium conductance.
47 citations
Patent•
13 May 1997
TL;DR: In this paper, the authors compare the outward-facing regions on two or more successive cross-sectional layers of the object to determine whether the outwardfacing regions associated with one of the layers represents what was originally intended to be a smooth transitional region (i.e. a sloping region) between two cross-sections or a discontinuous region (e.g. a vertical transitional region).
Abstract: A rapid prototyping and manufacturing apparatus and method (e.g. stereolithographic apparatus and a method) for layer-by-layer formation of a three-dimensional object represented by cross-sectional data including a method and apparatus for deriving data for at least a portion of a region intermediate to two successive cross-sections of data for use in forming the three-dimensional object with improved surface resolution. Outward-facing regions on two or more successive cross-sectional layers of the object are compared to determine whether the outward-facing region(s) associated with one of the layers represents what was originally intended to be a smooth transitional region (i.e. a sloping region) between two cross-sections or a discontinuous region (i.e. vertical transitional region) between two cross-sections. The comparison may involve utilization of common boundaries between outward facing regions on the cross-sections. The comparison may further involve the utilization of widths of the outward-facing regions on adjacent cross-sections.
45 citations
TL;DR: It is suggested that there is a conspicuous reorganization of the proximal part of the root after the more distal PNS part and the more proximal CNS part had acquired myelin.
37 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2019 | 1 |
| 2017 | 3 |
| 2016 | 1 |
| 2015 | 6 |
| 2014 | 4 |