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Related Concept Videos

Second Order systems II01:18

Second Order systems II

408
In an underdamped second-order system, where the damping ratio ζ is between 0 and 1, a unit-step input results in a transfer function that, when transformed using the inverse Laplace method, reveals the output response. The output exhibits a damped sinusoidal oscillation, and the difference between the input and output is termed the error signal. This error signal also demonstrates damped oscillatory behavior. Eventually, as the system reaches a steady state, the error diminishes to zero.
408
First Order Systems01:21

First Order Systems

430
First-order systems, such as RC circuits, are foundational in understanding dynamic systems due to their straightforward input-output relationship. Analyzing their responses to different input functions under zero initial conditions reveals significant insights into system behavior.
When a first-order system is subjected to a unit-step input, its response is characterized by its transfer function. By applying the Laplace transform of the unit-step input to the transfer function, expanding the...
430
Second Order systems I01:20

Second Order systems I

598
A servo system exemplifies a second-order system, featuring a proportional controller and load elements that ensure the output position aligns with the input position. The relationship between these components is described by a second-order differential equation. Applying the Laplace transform under zero initial conditions yields the transfer function, showing how inputs are converted to outputs in the system.
By reinterpreting the system, one can derive the closed-loop transfer function, which...
598
Thermodynamic Systems01:06

Thermodynamic Systems

8.1K
A thermodynamic system is a set of objects whose thermodynamic properties are of interest. The system is considered to be embedded in its surroundings or the environment. The system and its environment can exchange heat and do work on each other through a boundary that separates them. However, the immediate surroundings of the system interact with it directly and therefore have a much stronger influence on its behavior and properties.
Consider an example of  tea boiling in a kettle. The...
8.1K
Classification of Systems-I01:26

Classification of Systems-I

594
Linearity is a system property characterized by a direct input-output relationship, combining homogeneity and additivity.
Homogeneity dictates that if an input x(t) is multiplied by a constant c, the output y(t) is multiplied by the same constant. Mathematically, this is expressed as:
594
Classification of Systems-II01:31

Classification of Systems-II

503
Continuous-time systems have continuous input and output signals, with time measured continuously. These systems are generally defined by differential or algebraic equations. For instance, in an RC circuit, the relationship between input and output voltage is expressed through a differential equation derived from Ohm's law and the capacitor relation,
503

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Therapy satisfaction and health literacy are key factors to improve medication adherence in systemic sclerosis.

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Related Experiment Video

Updated: Feb 4, 2026

Imaging Features of Systemic Sclerosis-Associated Interstitial Lung Disease
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[Mimetics of systemic sclerosis].

S T Jendrek1, B Kahle2, G Riemekasten3

  • 1Klinik für Rheumatologie und klinische Immunologie, Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Ratzeburger Allee 160, 23538, Lübeck, Deutschland. SebastianTorben.Jendrek@uksh.de.

Zeitschrift Fur Rheumatologie
|September 27, 2018
PubMed
Summary

Differentiating systemic sclerosis (SSc) from other skin-thickening diseases is crucial for timely diagnosis and treatment. Recognizing mimics like morphea and scleromyxedema aids in accurate SSc identification.

Keywords:
MorpheaNephrogenic systemic fibrosisSclerodermaScleromyxedemaSkin fibrosis

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Area of Science:

  • Rheumatology
  • Dermatology
  • Internal Medicine

Background:

  • Systemic sclerosis (SSc) presents with diverse symptoms, including peripheral skin fibrosis.
  • Skin thickening can stem from various conditions, complicating early SSc diagnosis.

Purpose of the Study:

  • To differentiate SSc from other diseases causing dermal fibrosis.
  • To facilitate earlier and more accurate diagnosis of SSc.

Main Methods:

  • Literature search for conditions associated with skin fibrosis.
  • Description of clinical presentation, etiology, and treatment of identified diseases.

Main Results:

  • Identified mimics of SSc include morphea, scleroderma, diabetic cheirarthritis, scleromyxedema, nephrogenic systemic fibrosis, and eosinophilic fasciitis.
  • Key differentiating factors for SSc include pronounced skin involvement, Raynaud's phenomenon, capillary microscopy, histopathology, and antinuclear antibodies.

Conclusions:

  • Early differential diagnosis is vital to manage SSc's potential life-threatening systemic organ involvement.
  • Post-diagnosis, regular organ-specific evaluations (pulmonary, GI, renal, cardiac) are mandatory for SSc patients.