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Control systems are everywhere in contemporary society, influencing diverse applications from aerospace to automated manufacturing. These systems can be found naturally within biological processes, such as blood sugar regulation and heart rate adjustment in response to stress, as well as in man-made systems like elevators and automated vehicles. A control system is essentially a network of subsystems and processes that collaboratively convert specific inputs into desired outputs.
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Control Systems: Applications01:25

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Electrical engineering plays a pivotal role in our daily lives, with control systems at the heart of many applications, from home appliances to sophisticated space shuttles. Control systems manage and regulate the behavior of devices and processes, ensuring they function safely, correctly, and efficiently.
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Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
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Transfer Function in Control Systems01:21

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The transfer function is a fundamental concept in the analysis and design of linear time-invariant (LTI) systems. It offers a concise way to understand how a system responds to different inputs in the frequency domain. It serves as a bridge between the time-domain differential equations that describe system dynamics and the frequency-domain representation that facilitates easier manipulation and analysis.
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Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
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Imaging Features of Systemic Sclerosis-Associated Interstitial Lung Disease
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Oral features of systemic sclerosis: A case-control study.

Guilherme Soares Gomes da Silva1, Marina Lins Maymone de Melo1, Jair Carneiro Leão1

  • 1Oral Medicine Unit, Departamento de Clínica e Odontologia Preventiva, Universidade Federal de Pernambuco, Recife, Brazil.

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Systemic sclerosis (SSc) frequently causes orofacial issues, including a unique pattern of periodontitis. This study highlights common oral health problems in SSc patients compared to controls.

Keywords:
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Area of Science:

  • Oral Medicine
  • Rheumatology
  • Periodontology

Background:

  • Systemic sclerosis (SSc) is an autoimmune disease affecting connective tissues.
  • Orofacial manifestations are common but not fully characterized in SSc patients.

Purpose of the Study:

  • To evaluate orofacial parameters in patients with systemic sclerosis (SSc).
  • To identify specific orofacial features and their association with SSc.

Main Methods:

  • A descriptive case-control study was conducted with 93 participants.
  • The study included 50 SSc patients and 43 healthy controls.

Main Results:

  • Frequent findings in SSc patients included telangiectasia and reduced mouth opening.
  • Periodontitis was significantly more prevalent in SSc patients (90.7%) than controls (48.83%).
  • SSc patients exhibited a distinct periodontal pattern: low probing depth, high attachment loss, and reduced gingival bleeding.

Conclusions:

  • Orofacial manifestations are prevalent in systemic sclerosis.
  • A unique periodontal profile, characterized by specific clinical parameters, is associated with SSc.
  • These findings underscore the importance of monitoring oral health in SSc management.