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Related Concept Videos

Van der Waals Interactions01:24

Van der Waals Interactions

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Atoms and molecules interact with each other through intermolecular forces. These electrostatic forces arise from attractive or repulsive interactions between particles with permanent, partial, or temporary charges. The intermolecular forces between neutral atoms and molecules are ion–dipole, dipole–dipole, and dispersion forces, collectively known as van der Waals forces.
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Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)01:15

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

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Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
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Stability of Conjugated Dienes01:28

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A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
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IP3/DAG Signaling Pathway01:11

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Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the  phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and...
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Structure of Conjugated Dienes01:16

Structure of Conjugated Dienes

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Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...
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Vesicular Tubular Clusters01:45

Vesicular Tubular Clusters

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After budding out from the ER membrane, some COPII vesicles lose their coat and fuse with one another to form larger vesicles and interconnected tubules called vesicular tubular clusters or VTCs. These clusters constitute a compartment at the ER-Golgi interface known as ERGIC (Endoplasmic Reticulum Golgi Intermediate Compartment). The ERGIC is a mobile membrane-bound cargo transport system that sorts proteins secreted from ER and delivers them to the Golgi.
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Related Experiment Video

Updated: Sep 20, 2025

Inherent Dynamics Visualizer, an Interactive Application for Evaluating and Visualizing Outputs from a Gene Regulatory Network Inference Pipeline
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Context-Aware Pending Interest Table Management Scheme for NDN-Based VANETs.

Waseeq Ul Islam Zafar1, Muhammad Atif Ur Rehman2, Farhana Jabeen1

  • 1Department of Computer Science, COMSATS University, Islamabad 45550, Pakistan.

Sensors (Basel, Switzerland)
|June 10, 2022
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Summary
This summary is machine-generated.

Vehicular Adhoc NETworks (VANETs) face challenges with content delivery needs. A new context-aware protocol improves Named Data Networking (NDN) performance by managing Pending Information Tables (PIT) effectively.

Keywords:
NDNNamed Defined Networking (NDN)PITPending Information TableVANETscontext-aware namingnon-safety contentsafety content dissemination

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Area of Science:

  • Computer Science
  • Networking
  • Vehicular Technology

Background:

  • Vehicular Adhoc NETworks (VANETs) applications have diverse and often conflicting delivery requirements, including latency, reliability, and priority.
  • Named Data Networking (NDN) shows promise for content dissemination in mobile environments like VANETs, leveraging contextual information for decision-making.
  • The Pending Information Table (PIT) in NDN is crucial for data retrieval but faces scalability issues due to limited memory, leading to PIT overflow and service disruption.

Purpose of the Study:

  • To address the bottleneck of PIT size in NDN-based VANETs.
  • To introduce adaptive, context-aware solutions for effective PIT entry management.
  • To enhance content dissemination efficiency in VANETs by optimizing PIT utilization.

Main Methods:

  • Development of a decentralized, context-aware PIT entry management (CPITEM) protocol.
  • Simulation-based evaluation of the proposed CPITEM protocol against existing methods.
  • Analysis of Interest Satisfaction Delay and PIT utilization under various network conditions.

Main Results:

  • The CPITEM protocol demonstrates lower Interest Satisfaction Delay compared to existing protocols.
  • Effective PIT utilization is achieved by the CPITEM protocol through context-aware management.
  • The proposed solution mitigates service disruptions caused by PIT overflow in NDN-based VANETs.

Conclusions:

  • The CPITEM protocol offers a viable solution for improving content dissemination in VANETs using NDN.
  • Context-aware management of the PIT is essential for efficient data retrieval in dynamic vehicular environments.
  • The CPITEM protocol enhances NDN performance in VANETs by optimizing resource utilization and reducing latency.