Results 51 to 60 of about 7,881 (155)

Validation of numerical simulations and experiments on impulse characteristics induced by self-excited oscillation

Scientific Reports
The high-frequency pulse flow, equivalent to the natural frequency of rocks, is generated by a self-excited oscillating cavity to achieve resonance rock-breaking.
Qiang Wu, Guodong Ji, Jian Zhao, Liudang Sun, Dapeng Han, Li Liu, Huaigang Hu, Jinping Yu, Changchang Chen, Yuqi Sun, Jinyong Guo   +10 more
doaj   +1 more source

Time-Domain Analysis of Rectangular Pulse Response in Capacitive Impedance Sensing Using Capacitively Coupled Contactless Electrodes

Sensors
Impulse-based impedance sensing with capacitively coupled electrodes is introduced as a fast, non-contact, and simplified complementary method to conventional capacitive impedance measurements.
Damian Wanta, Waldemar T. Smolik, Mikhail Ivanenko, Jacek Kryszyn, Oliwia Makowiecka, Grzegorz Domański, Przemysław Wróblewski, Mateusz Midura, Mateusz Orzechowski   +8 more
doaj   +1 more source

Discrepancy between airwave and impulse oscillometry measurements of impedance in healthy children

Pediatric Pulmonology
Introduction: Respiratory oscillometry (OSC) is a pulmonary function test that measures respiratory system impedance and is well-suited for young children. Previous studies have suggested that there may be differences between impedance values obtained on different instruments, however, no studies comparing ...
Heather Boas, Katharine Tsukahara, Joseph McDonough, Tryce Scully, Catherine Qiu, Laurie Travaglini, Kristina Ziolkowski, Maureen Parenti, Clement L. Ren, Sara B. DeMauro, Samuel L. Goldfarb, Julian L. Allen   +11 more
openaire   +1 more source

Interpretation of Partial-Discharge-Activated Frequency Response Analysis for Transformer Diagnostics

Machines
This paper introduces a novel diagnostic approach called partial-discharge-activated impulse frequency response analysis (PD-IFRA), developed to overcome the limitations of conventional frequency response analysis (FRA) in detecting partial discharges ...
Bonginkosi A. Thango
doaj   +1 more source

Use of Impulse Oscillometry in Patients with Chronic Obstructive Pulmonary Disease

Thoracic Research and Practice
OBJECTIVE: Although spirometry is a standard diagnostic tool for obstructive lung diseases, it is rarely performed, and the quality of basic spirometry is low in many countries. The impulse oscillometry system (IOS) is a non-invasive method that requires
Burcu Öztürk Şahin, Nurdan Köktürk
doaj   +1 more source

The site of airway obstruction among patients of emphysema: Role of impulse oscillometry

Lung India, 2008
Objectives: To detect the site of airway obstruction in patients of emphysema by impulse oscillometry (IOS) and to compare its observatios with flow volume loop (FV loop) studies.
Hira H, Munjal Jitendra, Zachariah Sanjay, Chauhan M, Singh Anshu   +4 more
doaj  

Experimental Study on Lightning Transient Overvoltage Damage of Interface Devices of High-speed Railway Signal Equipment

工程科学与技术
This article proposes a method for detecting and determining the lightning overvoltage damage in communication interfaces of high-speed railway signal equipment, which is an optimization and improvement of the current lightning test and detection methods
Zhoulong WANG, Jinpeng XU, Shaoyun JIN, Ruikun MAI   +3 more
doaj  

A Variable-Impulse Hammer Impact Test (VIHIT) Method for Improved Mode Shape Identification. [PDF]

Sensors (Basel)
Jensen A, Riley C.
europepmc   +1 more source

Thermal Injury Leading to Myocardial Perforation During Cavotricuspid Isthmus Ablation: A Case Report. [PDF]

Am J Case Rep
Sawasaki K, Hosoya N, Mutoh M.
europepmc   +1 more source

Early Small Airway Mechanics and Functional Correlates in Asymptomatic Smokers: An Impulse Oscillometry-Based Study. [PDF]

Lung
Aksakal A, Kerget B, Sağ A, Coşkuner MB.   +3 more
europepmc   +1 more source