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Lossy Lines and Overvoltages

Lossy Lines and Overvoltages

Transmission-line series resistance and shunt conductance cause three primary effects: attenuation, distortion, and power losses.
Attenuation
When constant series resistance and shunt conductance are present, voltage and current equations are modified. The propagation constant indicates that voltage and current waves consist of both forward and backward traveling components. These waves attenuate as they propagate, with the attenuation factor related to the resistance and conductance. In a...

Lossless Lines

Lossless Lines

In electrical engineering, a lossless transmission line is characterized by a purely imaginary propagation constant and a resistive characteristic impedance. The ABCD parameters, which describe the relationship between the input and output voltages and currents, indicate an equivalent π circuit with an imaginary series impedance and a shunt admittance. This results in a transmission line that, when the product of the phase constant (beta) and the length of the line is less than pi,...

Line Loss

Line Loss

The different configurations of source-load connections include wye (star) and delta connections. The relationship between line and phase voltages and currents varies depending on the configuration. When the source is supplying power, it is transmitted through the wires to the load, and during this transmission, some power is absorbed by the wires, leading to line loss.
Line loss impacts power delivery efficiency in a balanced three-phase circuit. The symmetry in such a circuit simplifies the...

Traveling Waves: Lossless Lines

Traveling Waves: Lossless Lines

The provided content explores the behavior of traveling waves on single-phase lossless transmission lines. It begins with a single-phase two-wire lossless transmission line of length Δx, characterized by a loop inductance LH/m and a line-to-line capacitance C F/m. These parameters result in a series inductance LΔx and a shunt capacitance CΔx.

Boundary Conditions: Lossless Lines

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Systematic Error: Methodological and Sampling Errors

Systematic Error: Methodological and Sampling Errors

In the case of systematic errors, the sources can be identified, and the errors can be subsequently minimized by addressing these sources. According to the source, systematic errors can be divided into sampling, instrumental, methodological, and personal errors.
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Related Experiment Video

Updated: Sep 3, 2025

Integrating Computerized Linguistic and Social Network Analyses to Capture Addiction Recovery Capital in an Online Community

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Published on: May 31, 2019

Who is Dropped and Why? Methodological and Substantive Accounts for Network Loss.

Claude S Fischer¹, Shira Offer²

¹University of California, Berkeley.

Social Networks

|July 25, 2022

Summary

Understanding social network dynamics is key. This study reveals that close relationships and supportive ties are more likely to be maintained, while weaker ties are more prone to turnover in social networks.

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Published on: August 5, 2014

Area of Science:

Social Network Analysis
Sociology
Psychology

Background:

High rates of egocentric network turnover are common but poorly understood.
Previous research indicates significant changes in personal social networks over time.

Purpose of the Study:

To investigate the predictors of relationship turnover within personal social networks.
To differentiate between forgotten alters and intentionally dropped ties.

Main Methods:

Utilized data from the UCNets survey with approximately 1,000 respondents interviewed a year apart.
Employed multilevel logit models to analyze factors influencing the retention or dropping of social ties.

Main Results:

Immediate kin were most likely to be retained; roommates, coworkers, and acquaintances were most likely to be dropped.
Ties providing companionship, confiding, advice, and emergency help were strongly associated with retention.
Personal life events (moving, bereavement, relationship breakup) had minimal impact on tie drop rates.

Conclusions:

The degree of social tie constraint (e.g., family) and the balance of rewards significantly predict relationship maintenance or loss.
The true rate of actively dropped social ties is likely lower than previously estimated, with forgetting playing a notable role.