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Related Concept Videos

Applications of Stress01:04

Applications of Stress

Consider a structure made of a boom and a rod designed to support a load. These two components are connected by a pin and stabilized by brackets and pins. The boom and the rod are detached from their supports to assess the different stresses imposed on this structure, and a free-body diagram is drawn. Then, all the forces applied, including the load acting on the structure, are identified. The reaction forces exerted on both the boom and the rod are computed using the equilibrium equations.
The...
Singularity Functions for Bending Moment01:18

Singularity Functions for Bending Moment

Singularity functions simplify the representation of bending moments in beams subjected to discontinuous loading, allowing the use of a single mathematical expression. For a supported beam AB, with uniform loading from its midpoint M to the right side end B, the approach involves conceptual 'cuts' at specific points to determine the bending moment in each segment. By cutting the beam at a point between A and M, the bending moment for the segment before reaching midpoint M is represented using a...
BIBO stability of continuous and discrete -time systems01:24

BIBO stability of continuous and discrete -time systems

System stability is a fundamental concept in signal processing, often assessed using convolution. For a system to be considered bounded-input bounded-output (BIBO) stable, any bounded input signal must produce a bounded output signal. A bounded input signal is one where the modulus does not exceed a certain constant at any point in time.
To determine the BIBO stability, the convolution integral is utilized when a bounded continuous-time input is applied to a Linear Time-Invariant (LTI) system.
Impact Loading on a Cantilever Beam01:13

Impact Loading on a Cantilever Beam

The analysis of a cantilever beam with a circular cross-section subjected to impact loading at its free end illustrates the conversion of potential energy from a dropped object into kinetic energy, which is then absorbed by the beam as strain energy. This process is crucial for understanding how materials behave under dynamic loads, which is important in fields such as construction and aerospace.
When an object is dropped onto the free end of a cantilever, its potential energy due to gravity is...
Beams01:30

Beams

Beams are integral components of structural engineering and construction, designed to support loads applied at various points along their length. These long, straight members can be classified based on geometry, cross-section, support type, and equilibrium condition.
Based on geometry, beams can be straight, tapered, or curved. Straight beams are the most common type and have a constant cross-section throughout their length. Tapered beams, on the other hand, have a varying cross-section along...
Beams with Unsymmetric Loadings01:17

Beams with Unsymmetric Loadings

Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
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FIBS-enabled Noninvasive Metabolic Profiling
09:16

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Published on: February 3, 2014

Fas Bim boom!

Douglas R Green1

  • 1Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA. douglas.green@stjude.org

Immunity
|February 16, 2008
PubMed
Summary
This summary is machine-generated.

New research shows that apoptosis regulators Bim and Fas are crucial for T cell contraction. Failure in this process has significant consequences for immune responses.

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Area of Science:

  • Immunology
  • Cell Biology

Background:

  • T cell contraction is a critical phase of adaptive immune responses.
  • Apoptosis regulators play vital roles in immune cell homeostasis.

Purpose of the Study:

  • To investigate the roles of Bim and Fas in T cell contraction.
  • To understand the consequences of impaired T cell contraction.

Main Methods:

  • Studies by Hughes et al. (2008), Hutcheson et al. (2008), and Weant et al. (2008) were reviewed.
  • Analysis of the involvement of apoptosis regulators in T cell responses.

Main Results:

  • Bim and Fas are highlighted as key regulators in the contraction phase of T cell responses.
  • The findings reveal the detrimental effects when this apoptotic process fails.

Conclusions:

  • Bim and Fas are essential for effective T cell contraction.
  • Dysregulation of these apoptosis regulators can lead to adverse outcomes in immune function.