Achieving the desired resonant frequency of resonators has been an important issue, since it determines their performance. This paper presents the design and analysis of two concepts for the resonant frequency tuning of resonators. The proposed methods are based on the stiffness alteration of the springs by geometrical modification (shaft-widening) or by mechanical restriction (shaft-holding) using micromachined frequency tuning units. Our designs have advantages in (1) reversible and repetitive tuning; (2) decoupled control over the amplitude of the resonator and the tuning ratio; and (3) a wide range of applications including torsional resonators. The ability to tune the frequency by both methods is predicted by finite element analysis (FEA) and experimentally verified on a torsional resonator driven by an electrostatic actuator. The tuning units and resonators are fabricated on a double silicon-on-insulator (DSOI) wafer to electrically insulate the resonator from the tuning units. The shaft-widening type and shaft-holding type exhibit a maximum tuning ratio of 5.29% and 10.7%, respectively.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6187933 | PMC |
| http://dx.doi.org/10.3390/mi8120342 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Proteomic signature of HIV-associated subclinical left atrial remodeling and incident heart failure.
Nat Commun
January 2025
Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, MD, USA.
People living with HIV are at higher risk of heart failure and associated left atrial remodeling compared to people without HIV. Mechanisms are unclear but have been linked to inflammation and premature aging. Here we obtain plasma proteomics concurrently with cardiac magnetic resonance imaging in two independent study populations to identify parallels between HIV-related and aging-related immune dysfunction that could contribute to atrial remodeling and clinical heart failure.
View Article and Find Full Text PDFCentral Nervous System Infections in Recipients of Solid Organ Transplant.
Transplant Proc
January 2025
Division of Infectious Diseases, Department of Medicine, The University of Texas Health Science Center at Houston, Houston, Texas. Electronic address:
Background: Central nervous system (CNS) infections are severe and life-threatening complications that can occur in solid organ transplant (SOT) recipients. We describe the epidemiology, clinical presentation, diagnosis, disease course, and outcome of CNS infections in SOT.
Methods: We analyzed data of patients who underwent transplantation from September 2012 to February 2023, diagnosed and treated for CNS infections at our institution in Houston, TX.
Trigeminal neuralgia: therapeutic strategies to restore quality of life.
J Oral Facial Pain Headache
September 2024
Aragon Dental Clinic, Faculty of Higher Studies Iztacala, National Autonomous University of Mexico, 057130 Nezahualcóyotl, EM, Mexico.
Trigeminal neuralgia (TN) usually affects the maxillary and mandibular branches of the fifth cranial nerve. Although the condition is primarily unilateral, few cases of bilateral manifestation have been reported. TN is uncommon; however, it significantly affects patients' quality of life because the neuropathic pain worsens over time.
View Article and Find Full Text PDFLiver function and Alzheimer's brain pathologies: A longitudinal study: Liver and Alzheimer's pathologies.
J Prev Alzheimers Dis
January 2025
Department of Neuropsychiatry, Seoul National University Hospital, Seoul, 03080, Republic of Korea; Department of Psychiatry, Seoul National University College of Medicine, Seoul, 03080, Republic of Korea; Institute of Human Behavioral Medicine, Medical Research Center Seoul National University, Seoul, 03080, Republic of Korea; Interdisciplinary Program of Cognitive Science, Seoul National University College of Humanities, Seoul, 08826, Republic of Korea. Electronic address:
Importance: The neuropathological links underlying the association between changes in liver function and AD have not yet been clearly elucidated.
Objective: We aimed to examine the relationship between liver function markers and longitudinal changes in Alzheimer's disease (AD) core pathologies.
Design: Data from the Korean Brain Aging Study for the Early Diagnosis and Prediction of Alzheimer's Disease, a longitudinal cohort study initiated in 2014, were utilized.
Association between left ventricular reverse remodelling and the B-type natriuretic peptide-cGMP cascade after anterior acute myocardial infarction.
Open Heart
January 2025
Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan.
Background: The role of cyclic guanosine 3',5'-monophosphate (cGMP) after acute myocardial infarction (AMI) is not well understood despite its significance as a second messenger of natriuretic peptides (NPs) in cardiovascular disease. We investigated the association between the NP-cGMP cascade and left ventricular reverse remodelling (LVRR) in anterior AMI.
Methods: 67 patients with their first anterior AMI (median age, 64 years; male, 76%) underwent prospective evaluation of plasma concentrations of the molecular forms of A-type and B-type natriuretic peptide (BNP) and cGMP from immediately after primary percutaneous coronary intervention (PPCI) to 10 months post-AMI.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!