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Related Concept Videos

Carrier-Mediated Transport01:06

Carrier-Mediated Transport

Carrier-mediated transport is a pivotal process in drug absorption, particularly for lipid-insoluble drugs, and encompasses facilitated diffusion and active transport. Facilitated diffusion allows drugs to move along their concentration gradient without energy expenditure, while active transport utilizes ATP to drive drug movement against this gradient.
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
What are Second Messengers?01:12

What are Second Messengers?

Because many receptor binding ligands are hydrophilic, they do not cross the cell membrane and thus their message must be relayed to a second messenger on the inside. There are several second messenger pathways, each with their own way of relaying information. G-protein coupled receptors can activate both phosphoinositol and cyclic AMP (cAMP) second messenger pathways. The phosphoinositol path is active when the receptor induces phospholipase C to hydrolyze the phospholipid,...
What are Second Messengers?01:12

What are Second Messengers?

Because many receptor binding ligands are hydrophilic, they do not cross the cell membrane and thus their message must be relayed to a second messenger on the inside. There are several second messenger pathways, each with their own way of relaying information. G-protein coupled receptors can activate both phosphoinositol and cyclic AMP (cAMP) second messenger pathways. The phosphoinositol path is active when the receptor induces phospholipase C to hydrolyze the phospholipid,...
Signal and System01:26

Signal and System

A signal x(t) is a set of data or a time function representing a variable of interest. Signals typically convey information about a phenomenon, such as atmospheric temperature, humidity, human voice, television images, a dog's bark, or birdsongs. More generally, a signal can be a function of more than one independent variable. For instance, images depend on horizontal and vertical positions and can be regarded as two-dimensional signals. However, this text will focus on one-dimensional signals...
Short-distance Transport of Resources02:12

Short-distance Transport of Resources

Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
Amplifying Signals via Second Messengers01:15

Amplifying Signals via Second Messengers

Many receptor binding ligands are hydrophilic; they do not cross the cell membrane but bind to cell-surface receptors. Thus, their message must be relayed by second messengers present in the cell cytoplasm. There are several second messenger pathways, each with its own way of relaying information. For example, the G protein-coupled receptors can activate both phosphoinositol and cyclic AMP (cAMP) second messenger pathways. The phosphoinositol pathway is active when the receptor induces...

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Related Experiment Video

Updated: May 24, 2026

Integration of 5G Experimentation Infrastructures into a Multi-Site NFV Ecosystem
10:15

Integration of 5G Experimentation Infrastructures into a Multi-Site NFV Ecosystem

Published on: February 3, 2021

SOMM: A new service oriented middleware for generic wireless multimedia sensor networks based on code mobility.

Mohammad Mehdi Faghih1, Mohsen Ebrahimi Moghaddam

  • 1Electrical and Computer Engineering Department, Shahid Beheshti University, G. C., Tehran 1983963113, Iran. me.faghih@mail.sbu.ac.ir

Sensors (Basel, Switzerland)
|February 21, 2012
PubMed
Summary
This summary is machine-generated.

Developing applications for Wireless Multimedia Sensor Networks (WMSNs) is simplified by SOMM, a new service-oriented middleware. SOMM enables scalable WMSN application development using mobile agents and a virtual machine.

Keywords:
TinyOSWireless Multimedia Sensor Networkscode mobilitymiddlewareservice oriented architecture

Related Experiment Videos

Last Updated: May 24, 2026

Integration of 5G Experimentation Infrastructures into a Multi-Site NFV Ecosystem
10:15

Integration of 5G Experimentation Infrastructures into a Multi-Site NFV Ecosystem

Published on: February 3, 2021

Area of Science:

  • Computer Science
  • Network Engineering

Background:

  • Programming sensor nodes in Wireless Multimedia Sensor Networks (WMSNs) is complex due to resource constraints and low-level APIs.
  • Current WMSN systems lack clear separation between application and system logic, hindering code reuse and platform adaptability.

Purpose of the Study:

  • To introduce SOMM, a service-oriented middleware designed to streamline WMSN application development.
  • To enable the creation of modifiable and scalable WMSN applications.

Main Methods:

  • SOMM utilizes a virtual machine capable of supporting mobile agents for service provision.
  • A "t-space" is provided on each node for inter-agent communication.

Main Results:

  • SOMM facilitates the development of WMSN applications with improved modifiability and scalability.
  • Networks using SOMM can concurrently offer multiple services to various clients with guaranteed Quality of Service (QoS).

Conclusions:

  • SOMM offers a novel approach to WMSN application development, simplifying programming and enhancing system flexibility.
  • The middleware's service-oriented architecture and mobile agent support contribute to more robust and adaptable WMSN deployments.