Related Experiment Video
Updated: Jan 28, 2026

11:19
Dorsal Column Steerability with Dual Parallel Leads using Dedicated Power Sources: A Computational Model
Published on: February 10, 2011
12.3K
Sources of lead exposure in various countries
1Department of Built Environment, North Carolina Agricultural and Technical State University, Greensboro, NC 27411, USA.
Reviews on Environmental Health
|March 12, 2019
Summary
Worldwide lead exposure persists due to diverse sources like e-waste, paint, and traditional medicines. Both high-income and lower-income countries face significant public health risks from lead contamination.
Area of Science:
- Environmental Health
- Toxicology
- Public Health
Background:
- Lead exposure is a global public health concern with varied sources.
- Understanding these sources is crucial for effective prevention strategies.
Purpose of the Study:
- To review and identify the primary sources of lead exposure across different countries and regions worldwide.
- To highlight the differences and similarities in lead exposure pathways between high-income countries (HICs) and lower- and middle-income countries (LMICs).
Main Methods:
- A comprehensive literature review was conducted.
- Studies on lead exposure sources were searched and analyzed across various geographical zones.
Main Results:
- Identified diverse lead sources including e-waste, paint, batteries, glazed ceramics, cosmetics, traditional medicines, industrial emissions, and contaminated water.
- Highlighted that in LMICs, inadequate regulations exacerbate lead exposure risks.
- Noted that in HICs, the historical industrial legacy of lead exposure continues to pose risks.
Conclusions:
- Lead exposure remains a significant public health issue globally.
- Addressing lead exposure requires tailored strategies considering regional sources and regulatory capacities.
- Continued vigilance and regulatory enforcement are necessary in both HICs and LMICs.
Related Concept Videos
Phase-lead and Phase-lag Controllers
539
Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
539
Sinusoidal Sources
1.2K
Direct current (DC) refers to an electric current that flows in a single direction, maintaining a constant polarity. This is in contrast to alternating current (AC), which periodically changes its direction and magnitude. AC forms the backbone of modern electricity transmission and distribution systems due to its efficient long-distance transmission capabilities.
In homes, the power supplies use sinusoidal sources to provide electricity. These sources generate a voltage that varies sinusoidally...
In homes, the power supplies use sinusoidal sources to provide electricity. These sources generate a voltage that varies sinusoidally...
1.2K
Source Transformation
11.4K
Source transformation is a fundamental technique employed in circuit analysis, offering a valuable tool for simplifying complex electrical circuits. This technique involves the replacement of either a voltage source in series with a resistor by a current source in parallel with a resistor, or vice versa. The key concept here is that when the original sources are deactivated (turned off), the equivalent resistance at the circuit's end terminals remains the same.
It is essential to note that when...
It is essential to note that when...
11.4K
AC Sources
4.1K
Direct current is a flow of electric charge in only one direction and has a steady state of constant voltage in the circuit. Rectifiers, batteries, commutator-equipped generators, and fuel cells are some examples of devices that generate direct current. Nowadays, most applications use a time-varying voltage source. Alternating current is a flow of electric charge that periodically reverses direction. An alternating current is produced by an alternating emf that is generated in a power plant. If...
4.1K
Sources of Law
1.9K
Laws form the essential rules set by governing authorities to shape and control societal behavior. In nursing, laws guide actions, safeguard patient rights, define nurses' scope of practice, and maintain professional standards. Understanding the legal framework governing nursing involves recognizing four primary sources of law: constitutional, statutory, administrative (regulatory), and common law.
Constitutional law is foundational, deriving from federal and state constitutions, and...
Constitutional law is foundational, deriving from federal and state constitutions, and...
1.9K
Independent and Dependent Sources
2.6K
In electrical circuits, sources play a crucial role in providing power for the operation of the circuit. These sources can be broadly categorized into two types: independent and dependent.
Independent voltage or current sources supply a fixed amount of voltage or current, respectively, which is unaffected by other elements within the circuit. These are represented using specific symbols. Independent voltage sources are symbolized with polarities (+ and -), indicating the direction of the...
Independent voltage or current sources supply a fixed amount of voltage or current, respectively, which is unaffected by other elements within the circuit. These are represented using specific symbols. Independent voltage sources are symbolized with polarities (+ and -), indicating the direction of the...
2.6K

