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Related Concept Videos

Block Diagram Reduction01:22

Block Diagram Reduction

574
The process of deriving the transfer function of a control system often involves reducing its block diagram to a single block. This simplification can be achieved through a series of strategic operations, including relocating branch points and comparators. These operations preserve the overall function of the system while allowing for easier manipulation and combination of blocks.
The first step in this process is the identification and relocation of a branch point. A branch point, where a...
574
Elements of Block Diagrams01:25

Elements of Block Diagrams

732
Block diagrams serve as a visual representation of the input-output relationships within a system. An illustrative example is a heating system, where the set temperature activates the furnace to warm the room to the desired level. Block diagrams are versatile, modeling linear systems through Laplace transform variables and nonlinear systems using time domain variables.
A block diagram typically includes essential elements such as comparators, blocks, and feedback loops. Each of these elements...
732
Design of Transmission Shafts01:16

Design of Transmission Shafts

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The design of a transmission shaft is governed by two primary specifications: the power it transmits and its rotational speed. These parameters guide the selection of the shaft's material and cross-sectional dimensions, ensuring that the material's maximum shearing stress remains within the elastic limit while transmitting the desired power at the given speed. The system's power is intrinsically linked to the applied torque. The torque applied to the shaft can be calculated by reconfiguring the...
798
Transmission Line Design Considerations01:23

Transmission Line Design Considerations

634
Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
634
Transmission Shafts: Problem Solving01:09

Transmission Shafts: Problem Solving

525
Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
Next, use bending moment diagrams for the shaft to...
525
Transmission-Line Differential Equations01:26

Transmission-Line Differential Equations

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Transmission lines are essential components of electrical power systems. They are characterized by the distributed nature of resistance (R), inductance (L), and capacitance (C) per unit length. To analyze these lines, differential equations are employed to model the variations in voltage and current along the line.
Line Section Model
A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured from...
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Ookluc: A Plasmodium berghei Line for Identifying Transmission-blocking Compounds
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On a mission to block transmission.

Amanda Ross1,2, Nicolas Mb Brancucci2,3

  • 1Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland.

Elife
|February 28, 2018
PubMed
Summary

Controlled Plasmodium falciparum infection in volunteers offers a novel method for testing new malaria transmission-blocking drugs and vaccines. This approach aims to accelerate the development of effective interventions against malaria.

Keywords:
P. falciparumPlasmodium falciparumgametocytesinfectious diseasemalariamicrobiologytransmission

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Area of Science:

  • Infectious Diseases
  • Parasitology
  • Immunology

Background:

  • Malaria remains a significant global health burden, necessitating innovative strategies to combat transmission.
  • Current interventions face challenges, driving the need for new approaches to block parasite spread.

Purpose of the Study:

  • To establish a controlled human malaria infection model using Plasmodium falciparum.
  • To validate this model as a platform for evaluating transmission-blocking interventions.

Main Methods:

  • Recruitment and controlled infection of human volunteers with Plasmodium falciparum.
  • Monitoring of parasite levels and host immune responses.
  • Assessment of the model's suitability for drug and vaccine efficacy studies.

Main Results:

  • Demonstrated feasibility of controlled Plasmodium falciparum infection in volunteers.
  • Established a reproducible model for studying malaria transmission dynamics.
  • Confirmed the platform's potential for evaluating novel interventions.

Conclusions:

  • Controlled Plasmodium falciparum infection provides a valuable platform for malaria research.
  • This model can accelerate the development and testing of transmission-blocking drugs and vaccines.
  • Further research can optimize this approach for broader application in malaria control efforts.