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Journal articles on the topic 'Depth of breathing'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Schätz, Martin, Aleš Procházka, Jiří Kuchyňka, and Oldřich Vyšata. "Sleep Apnea Detection with Polysomnography and Depth Sensors." Sensors 20, no. 5 (2020): 1360. http://dx.doi.org/10.3390/s20051360.

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This paper is devoted to proving two goals, to show that various depth sensors can be used to record breathing rate with the same accuracy as contact sensors used in polysomnography (PSG), in addition to proving that breathing signals from depth sensors have the same sensitivity to breathing changes as in PSG records. The breathing signal from depth sensors can be used for classification of sleep apnea events with the same success rate as with PSG data. The recent development of computational technologies has led to a big leap in the usability of range imaging sensors. New depth sensors are sm

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2

Xie, Wentao, Chi Xu, Yanbin Gong, et al. "DeepBreath: Breathing Exercise Assessment with a Depth Camera." Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies 8, no. 3 (2024): 1–26. http://dx.doi.org/10.1145/3678519.

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Practicing breathing exercises is crucial for patients with chronic obstructive pulmonary disease (COPD) to enhance lung function. Breathing mode (chest or belly breathing) and lung volume are two important metrics for supervising breathing exercises. Previous works propose that these metrics can be sensed separately in a contactless way, but they are impractical with unrealistic assumptions such as distinguishable chest and belly breathing patterns, the requirement of calibration, and the absence of body motions. In response, this research proposes DeepBreath, a novel depth camera-based breat

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Schreer, Jason F., and Kit M. Kovacs. "Allometry of diving capacity in air-breathing vertebrates." Canadian Journal of Zoology 75, no. 3 (1997): 339–58. http://dx.doi.org/10.1139/z97-044.

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Maximum diving depths and durations were examined in relation to body mass for birds, marine mammals, and marine turtles. There were strong allometric relationships between these parameters (log10 transformed) among air-breathing vertebrates (r = 0.71, n = 111 for depth; r = 0.84, n = 121 for duration), although there was considerable scatter around the regression lines. Many of the smaller taxonomic groups also had a strong allometric relationship between diving capacity (maximum depth and duration) and body mass. Notable exceptions were mysticete cetaceans and diving/flying birds, which disp

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4

KARA, T. "Depth of breathing and baroreflex sensitivity." American Journal of Hypertension 12, no. 4 (1999): 181. http://dx.doi.org/10.1016/s0895-7061(99)80655-4.

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5

Bevan, David J., and Donald L. Kramer. "The effect of swimming depth on respiratory behavior of the honey gourami, Colisa chuna (Pisces, Belontiidae)." Canadian Journal of Zoology 64, no. 9 (1986): 1893–96. http://dx.doi.org/10.1139/z86-283.

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We tested the hypothesis that fish capable of bimodal respiration would respond to the increased travel costs of surfacing by decreasing their frequency of air breathing. Honey gouramis were permitted to move freely in a 220 cm deep aquarium, but their preferred depths were manipulated by changing the location of shelter and feeding sites. With increased depth the interval between air breaths increased. This supports the argument that travel to and from the surface is a significant cost for air-breathing fish. It provides evidence that respiratory behavior can be affected by factors not direct

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Kempfle, Jochen, and Kristof Van Laerhoven. "Towards Breathing as a Sensing Modality in Depth-Based Activity Recognition." Sensors 20, no. 14 (2020): 3884. http://dx.doi.org/10.3390/s20143884.

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Depth imaging has, through recent technological advances, become ubiquitous as products become smaller, more affordable, and more precise. Depth cameras have also emerged as a promising modality for activity recognition as they allow detection of users’ body joints and postures. Increased resolutions have now enabled a novel use of depth cameras that facilitate more fine-grained activity descriptors: The remote detection of a person’s breathing by picking up the small distance changes from the user’s chest over time. We propose in this work a novel method to model chest elevation to robustly m

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Tetzlaff, Kay, and Einar Thorsen. "Breathing at Depth: Physiologic and Clinical Aspects of Diving while Breathing Compressed Gas." Clinics in Chest Medicine 26, no. 3 (2005): 355–80. http://dx.doi.org/10.1016/j.ccm.2005.05.001.

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Eisen, Nachum E., and Alon Gany. "Theoretical Performance Evaluation of a Marine Solid Propellant Water-Breathing Ramjet Propulsor." Journal of Marine Science and Engineering 8, no. 1 (2019): 8. http://dx.doi.org/10.3390/jmse8010008.

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This work analyzes and presents theoretical performance of a marine water-breathing ramjet propulsor. A conceptual scheme of the motor is shown, the equation of thrust is presented, and the dependence on cruise velocity and depth are discussed. Different propellant compositions, representing a wide variety of formulations suitable for propelling a water-breathing ramjet, are investigated. The theoretical results reveal that the specific impulse of a water-breathing ramjet can increase by as much as 30% compared to a standard rocket, when using a conventional hydroxyl terminated polybutadiene (

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9

Pangestu, Adinda Widia, Jon Hafan Sutawardana, Murtaqib, and Mustakim. "Breathe Better: The Role of Pursed Lips Breathing Therapy in Chronic Bronchitis Patients." Jurnal Kegawatdaruratan Medis Indonesia 4, no. 1 (2025): 104–44. https://doi.org/10.58545/jkmi.v4i1.344.

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Chronic bronchitis is an inflammatory disease of the bronchial respiratory tract that lasts more than 3 months or several times in 2 years. Symptoms in patients with chronic bronchitis can affect breathing patterns, including dyspnea, respiratory frequency, depth of breathing, and oxygen saturation. Providing Pursed Lip Breathing therapy can create resistance to the air coming out of the lungs and open the airways to improve breathing patterns. This study aimed to analyze the effectiveness of Pursed Lip Breathing therapy on breathing patterns in patients with chronic bronchitis. This descripti

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10

Nguyen, Khoa Viet. "Monitoring breathing cracks of a beam-like bridge subjected to moving vehicle using wavelet spectrum." Vietnam Journal of Mechanics 35, no. 2 (2013): 131–45. http://dx.doi.org/10.15625/0866-7136/35/2/450.

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In this paper a wavelet spectrum technique for monitoring the breathing crack phenomenon of a beam-like bridge subjected to moving vehicle is presented. The stiffness of element with a breathing crack is modeled as a time dependent stiffness matrix using the finite element method. The stiffness matrix of the structure at each moment depends on the curvature of the structure at the crack position. The breathing crack phenomenon can be detected by analysing the instantaneous frequency (IF) of the system using the wavelet spectrum. When the crack depth is large, the crack area might be determined

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11

Talaat, Mohamed, Xiuhua April Si, and Jinxiang Xi. "Lower Inspiratory Breathing Depth Enhances Pulmonary Delivery Efficiency of ProAir Sprays." Pharmaceuticals 15, no. 6 (2022): 706. http://dx.doi.org/10.3390/ph15060706.

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Effective pulmonary drug delivery using a metered-dose inhaler (MDI) requires a match between the MDI sprays, the patient’s breathing, and respiratory physiology. Different inhalers generate aerosols with distinct aerosol sizes and speeds, which require specific breathing coordination to achieve optimized delivery efficiency. Inability to perform the instructed breathing maneuver is one of the frequently reported issues during MDI applications; however, their effects on MDI dosimetry are unclear. The objective of this study is to systemically evaluate the effects of breathing depths on regiona

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Nishino, T., K. Hiraga, T. Mizuguchi, and Y. Honda. "Respiratory reflex responses to stimulation of tracheal mucosa in enflurane-anesthetized humans." Journal of Applied Physiology 65, no. 3 (1988): 1069–74. http://dx.doi.org/10.1152/jappl.1988.65.3.1069.

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We investigated respiratory reflex responses to tracheal mucosa stimulation induced by injection of distilled water in 13 female patients under three different depths of enflurane anesthesia (0.7, 1.0, and 1.3 minimum alveolar concentration). Detailed analysis of the types of reflex responses revealed that there are at least six different responses: 1) the apneic reflex, 2) the expiration reflex, 3) spasmodic, panting breathing, 4) the cough reflex, 5) slowing of breathing, and 6) rapid, shallow breathing. Among these reflex responses, the cough reflex was the most sensitive and the apneic ref

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Wimarshana, Buddhi, Nan Wu, and Christine Wu. "Application of entropy in identification of breathing cracks in a beam structure: Simulations and experimental studies." Structural Health Monitoring 17, no. 3 (2017): 549–64. http://dx.doi.org/10.1177/1475921717704626.

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A cantilever beam with a breathing crack is studied to detect the crack and evaluate the crack depth using entropy measures. During the vibration in engineering structures, fatigue cracks undergo the status from close-to-open (and open-to-close) repetitively leading to a crack breathing phenomenon. Entropy is a measure, which can quantify the complexity or irregularity in system dynamics, and hence employed to quantify the bi-linearity/irregularity of the vibration response, which is induced by the breathing phenomenon of a crack. A mathematical model of harmonically excited unit length steel

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Altepe, Corentin, S. Murat Egi, Tamer Ozyigit, D. Ruzgar Sinoplu, Alessandro Marroni, and Paola Pierleoni. "Design and Validation of a Breathing Detection System for Scuba Divers." Sensors 17, no. 6 (2017): 1349. https://doi.org/10.3390/s17061349.

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<strong>Abstract</strong> Drowning is the major cause of death in self-contained underwater breathing apparatus (SCUBA) diving. This study proposes an embedded system with a live and light-weight algorithm which detects the breathing of divers through the analysis of the intermediate pressure (IP) signal of the SCUBA regulator. A system composed mainly of two pressure sensors and a low-power microcontroller was designed and programmed to record the pressure sensors signals and provide alarms in absence of breathing. An algorithm was developed to analyze the signals and identify inhalation even

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Wichum, Felix, Christian Wiede, and Karsten Seidl. "Depth-Based Measurement of Respiratory Volumes: A Review." Sensors 22, no. 24 (2022): 9680. http://dx.doi.org/10.3390/s22249680.

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Depth-based plethysmography (DPG) for the measurement of respiratory parameters is a mobile and cost-effective alternative to spirometry and body plethysmography. In addition, natural breathing can be measured without a mouthpiece, and breathing mechanics can be visualized. This paper aims at showing further improvements for DPG by analyzing recent developments regarding the individual components of a DPG measurement. Starting from the advantages and application scenarios, measurement scenarios and recording devices, selection algorithms and location of a region of interest (ROI) on the upper

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Regev, Nir, and Dov Wulich. "Multi-Modal, Remote Breathing Monitor." Sensors 20, no. 4 (2020): 1229. http://dx.doi.org/10.3390/s20041229.

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Monitoring breathing is important for a plethora of applications including, but not limited to, baby monitoring, sleep monitoring, and elderly care. This paper presents a way to fuse both vision-based and RF-based modalities for the task of estimating the breathing rate of a human. The modalities used are the F200 Intel® RealSenseTM RGB and depth (RGBD) sensor, and an ultra-wideband (UWB) radar. RGB image-based features and their corresponding image coordinates are detected on the human body and are tracked using the famous optical flow algorithm of Lucas and Kanade. The depth at these coordin

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17

Hampson, Neil B., and Richard E. Moon. "Arterial gas embolism breathing compressed air in 1.2 metres of water." Diving and Hyperbaric Medicine Journal 50, no. 3 (2020): 292–94. http://dx.doi.org/10.28920/dhm50.3.292-294.

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Arterial gas embolism (AGE) may result when diving while breathing compressed gas and ascending rapidly or with a closed glottis. Pulmonary over-pressurisation can result in lung stretch injury with entry of bubbles into the pulmonary venous circulation and subsequently the systemic arterial circulation. We present the case of an individual who suffered AGE while breathing compressed air at 1.2 metres’ fresh water (mfw) in a swimming pool and discuss the factors determining the depth at which this form of injury may occur. This case serves to underscore the fact that risk of AGE exists at shal

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18

Rahman, Md Mahbubur, Tousif Ahmed, Mohsin Yusuf Ahmed, et al. "BreatheBuddy." Proceedings of the ACM on Human-Computer Interaction 6, MHCI (2022): 1–18. http://dx.doi.org/10.1145/3546748.

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Breathing exercises reduce stress and improve overall mental well-being. There are various types of breathing exercises. Performing the exercises correctly may give the best outcome and doing it in wrong ways can sometimes have adverse effect. Providing real-time biofeedback can greatly improve the user experience in doing the right exercises in the right ways. In this paper, we present methods to passively track breathing biomarkers in real-time using wireless commodity earbuds and generate feedback on users' breathing performance. We use the earbud's low-power accelerometer to generate a com

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19

Liu, Qi, Shancheng Cao, and Zhiwen Lu. "An Improved Crack Breathing Model and Its Application in Crack Identification for Rotors." Machines 11, no. 5 (2023): 569. http://dx.doi.org/10.3390/machines11050569.

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The crack breathing model and crack identification method for rotors using nonlinearity induced by cracks are studied in this work. Firstly, the finite element method is utilized to model a rotor–bearing system with a response-dependent breathing crack to obtain the numerical data for crack identification. During the modelling, an improved breathing crack model is proposed, focused on the unreasonable assumption about crack closure line in the original crack closure line position (CCLP) model. Compared with the original model, the improved breathing model can reflect the nonlinear behavior of

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20

Steinmane, Valerija, and Andra Fernate. "AIM AND MEANING OF BREATHING EXERCISES: INTERDISCIPLINARY LITERATURE REVIEW." SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference 2 (May 22, 2024): 742–52. http://dx.doi.org/10.17770/sie2024vol2.7876.

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Respiration is an indispensable aspect of life that significantly influences both the physical and mental well-being of individuals, depending on such factors as depth and rhythm. Exploring the distinctions between chest and abdominal breathing is crucial for understanding their profound impacts, and embracing appropriate breathing exercises has proven to be advantageous for short-term relief and long-term holistic health. While acknowledged for diverse therapeutic applications, such as mitigating vocal cord fatigue, a comprehensive exploration of breathing exercises remains essential. Sport s

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21

Michael, J. A. "Students' misconceptions about perceived physiological responses." Advances in Physiology Education 274, no. 6 (1998): S90. http://dx.doi.org/10.1152/advances.1998.274.6.s90.

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Students' misconceptions about scientific phenomena can arise from at least two possible sources, the students' personal experience with those phenomena and things learned in the classroom. Misconceptions have been studied in a variety of science disciplines, but little attention has been given to the faulty models that students have for physiological processes. In this study 393 undergraduates in three different research universities were asked to predict the changes in heart rate and strength of cardiac contraction and breathing frequency and depth of breathing (physiological parameters that

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22

Roberts, D. T., V. Udyawer, C. Franklin, R. G. Dwyer, and H. A. Campbell. "Using an acoustic telemetry array to assess fish volumetric space use: a case study on impoundments, hypoxia and an air-breathing species (Neoceratodus forsteri)." Marine and Freshwater Research 68, no. 8 (2017): 1532. http://dx.doi.org/10.1071/mf16124.

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Facultative air-breathing fish can persist in hypoxic waters due to their capacity to acquire atmospheric oxygen. Most studies examining responses of air-breathing fish to aquatic hypoxia have occurred under experimental conditions. How air-breathing fish respond to hypoxic conditions in the field has received less attention. Using depth sensor transmitters and an array of acoustic receivers to monitor the facultative air-breathing Australian lungfish (Neoceratodus forsteri), we investigated habitat preferences and behavioural responses to seasonal hypoxic zones in a riverine impoundment. Thre

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Wimarshana, Buddhi, Felliphe Goes, Nan Wu*, and Christine Wu. "EXPERIMENTAL STUDY ON BREATHING CRACK DETECTION AND EVALUATION UNDER RANDOM LOADING WITH ENTROPY." Transactions of the Canadian Society for Mechanical Engineering 41, no. 5 (2017): 669–80. http://dx.doi.org/10.1139/tcsme-2017-502.

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Breathing crack detection and evaluation on a beam under random loading is experimentally studied and realized using entropy measures. During testing, the beam is subjected to random excitations which is the most evident excitation type experienced by most of the engineering structures. Frequency response function is employed to erase the random frequency components due to the excitation from the response of the structure to pick up the vibration characteristics of the beam structure itself with/without the breathing crack. Based on experimental results, the proposed methodology can clearly di

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Procházka, Aleš, Hana Charvátová, Oldřich Vyšata, Jakub Kopal, and Jonathon Chambers. "Breathing Analysis Using Thermal and Depth Imaging Camera Video Records." Sensors 17, no. 6 (2017): 1408. http://dx.doi.org/10.3390/s17061408.

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Ray, Andrew D., David R. Pendergast, and Claes E. G. Lundgren. "Respiratory muscle training reduces the work of breathing at depth." European Journal of Applied Physiology 108, no. 4 (2009): 811–20. http://dx.doi.org/10.1007/s00421-009-1275-3.

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Bevan, David J., and Donald L. Kramer. "The respiratory behaviour of an air-breathing catfish, Clarias macrocephalus (Clariidae)." Canadian Journal of Zoology 65, no. 2 (1987): 348–53. http://dx.doi.org/10.1139/z87-054.

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Clarias macrocephalus are continuous, facultative air breathers. Individuals (7.6–20.9 g) survived more than 25 days in normoxic water without surface access. Buoyancy decreased and water-breathing frequency increased when surface access was denied, but growth rate and the frequency of air-breathing attempts did not change. We examined air-breathing and water-breathing frequency in shallow (60 cm) and deep (235 cm) water under normoxic (8.0 mg O2∙L−1) and hypoxic (0.3, 0.7, 1.2, and 2.0 mg O2∙L−1) conditions to examine how changes in the travel costs of breathing affected the use of each respi

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Chu, Hongmin, Jaehyun Kim, Wonbae Ha, et al. "Change of Safe Needling Depth at Acupoint GB21 according to Posture and Breathing." Evidence-Based Complementary and Alternative Medicine 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/2308102.

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Acupoint GB21 (Jianjing) is used for treating back and shoulder pain but is associated with a risk of pneumothorax. We aimed to determine the SND (safe needling depth) at GB21 according to posture and breathing in real time. Ultrasonographic images of GB21 during normal breathing, inspiration, and expiration in a SP (sitting position) were acquired for 52 healthy volunteers. Images were also acquired during normal respiration in the PP (prone position) with arms raised and lowered. The average SND was greater for men than for women (p<0.05). Analysis of variance revealed that the SND was gr

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Brackenbury, J. H. "Blood gases and respiratory pattern in exercising fowl: comparison in normoxic and hypoxic conditions." Journal of Experimental Biology 126, no. 1 (1986): 423–31. http://dx.doi.org/10.1242/jeb.126.1.423.

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Clavicular air sac pressure, arterial blood gases and pH, and rectal temperature were measured in treadmill-exercised cockerels breathing air, 10% O2 in N2 or a mixture of 10% O2/3% CO2 in N2. Air sac pressures were used to estimate changes in the rate and the relative depth of breathing. In air-breathing conditions exercise took place at two intensities corresponding to treadmill speeds of 3.2 and 5.0 km h-1, respectively. Rectal temperature increased by 0.5 degrees C but there was no sign of thermal hyperventilation and arterial PCO2 remained constant. Increased ventilation was mainly brough

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Koos, B. J., A. Chao, and W. Doany. "Adenosine stimulates breathing in fetal sheep with brain stem section." Journal of Applied Physiology 72, no. 1 (1992): 94–99. http://dx.doi.org/10.1152/jappl.1992.72.1.94.

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Breathing responses to adenosine were determined in 12 chronically catheterized fetal sheep (greater than 0.8 term) in which hypoxic inhibition of breathing had been eliminated by brain stem section. The caudal extent of transection varied from the rostral midbrain to the pontomedullary junction. Isocapnic hypoxia [delta arterial PO2 (PaO2) of -12 Torr] doubled the incidence and depth of breathing activity and increased the incidence of eye movements. Intra-arterial infusion of adenosine (0.30 +/- 0.03 mg.min-1.kg fetal wt-1) increased the incidence and amplitude of breathing without affecting

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Salerno, Francesco G., Riccardo Pellegrino, Gianluca Trocchio, Antonio Spanevello, Vito Brusasco, and Emanuele Crimi. "Attenuation of induced bronchoconstriction in healthy subjects: effects of breathing depth." Journal of Applied Physiology 98, no. 3 (2005): 817–21. http://dx.doi.org/10.1152/japplphysiol.00763.2004.

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The effects of breathing depth in attenuating induced bronchoconstriction were studied in 12 healthy subjects. On four separate, randomized occasions, the depth of a series of five breaths taken soon (∼1 min) after methacholine (MCh) inhalation was varied from spontaneous tidal volume to lung volumes terminating at ∼80, ∼90, and 100% of total lung capacity (TLC). Partial forced expiratory flow at 40% of control forced vital capacity (V̇part) and residual volume (RV) were measured at control and again at 2, 7, and 11 min after MCh. The decrease in V̇part and the increase in RV were significantl

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Mah, Aaron James, Thien Nguyen, Leili Ghazi Zadeh, et al. "Optical Monitoring of Breathing Patterns and Tissue Oxygenation: A Potential Application in COVID-19 Screening and Monitoring." Sensors 22, no. 19 (2022): 7274. http://dx.doi.org/10.3390/s22197274.

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The worldwide outbreak of the novel Coronavirus (COVID-19) has highlighted the need for a screening and monitoring system for infectious respiratory diseases in the acute and chronic phase. The purpose of this study was to examine the feasibility of using a wearable near-infrared spectroscopy (NIRS) sensor to collect respiratory signals and distinguish between normal and simulated pathological breathing. Twenty-one healthy adults participated in an experiment that examined five separate breathing conditions. Respiratory signals were collected with a continuous-wave NIRS sensor (PortaLite, Arti

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Lalley, Peter M. "D1-dopamine receptor agonists prevent and reverse opiate depression of breathing but not antinociception in the cat." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 289, no. 1 (2005): R45—R51. http://dx.doi.org/10.1152/ajpregu.00868.2004.

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Opioids depress respiration and decrease chest wall compliance. A previous study in this laboratory showed that dopamine-D1 receptor (D1R) agonists restored phrenic nerve activity after arrest by fentanyl in immobilized, mechanically ventilated cats. The reinstated phrenic nerve rhythm was slower than control, so it was not known whether D1R agonists can restore spontaneous breathing to levels that provide favorable alveolar gas exchange and blood oxygenation. It was also not known whether the agonists counteract opioid analgesia. In the present study, anesthetized, spontaneously breathing cat

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Kushariyadi, Faiqoh Salsabillah Ufaidah, Rondhianto, and Eka Yufi Septriana Candra. "Combination Therapy Slow Deep Breathing and Acupressure to Overcome Ineffective Breathing Pattern Nursing Problems: A Case Study." Nursing and Health Sciences Journal (NHSJ) 3, no. 3 (2023): 320–26. http://dx.doi.org/10.53713/nhsj.v3i3.289.

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Therapy slow deep breathing exercise and acupressure is a complementary therapy that aims to reduce the symptoms of the disease to improve the quality of individual health. Complementary therapy is rarely done in hospitals so that the symptoms felt by patients are not reduced without medication. This therapy can reduce the symptoms of shortness of breath in patients who specifically experience impaired breathing patterns that are not effective. The study aims to determine the effectiveness of combination therapy slow deep breathing exercises and acupressure to address ineffective breathing pat

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Kewlani, Harsha. "Breathing Exercises for Behavior Guidance in Pediatric Dentistry." Quadrant 1, no. 3 (2023): 19–23. https://doi.org/10.5281/zenodo.11114839.

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Breathing Exercises (BE) have gained significant attention as a non-pharmacological approach to managing various aspects of children's health, including anxiety, stress, and pain. This comprehensive review aims to provide an in-depth analysis of the effectiveness and applications of BE in pediatric populations.

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Chen, Lihua, Jian Xue, Zhijie Zhang, and Wei Zhang. "Bifurcation Study of Thin Plate with an All-Over Breathing Crack." Advances in Materials Science and Engineering 2016 (2016): 1–19. http://dx.doi.org/10.1155/2016/1509384.

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An all-over breathing crack on the plate surface having arbitrary depth and location is assumed to be nonpropagating and parallel to one side of the plate. Based on a piecewise model, the nonlinear dynamic behaviors of thin plate with the all-over breathing crack are studied to analyze the effect of external excitation amplitudes and frequencies on cracked plate with different crack parameters (crack depth and crack location). Firstly, the mode shape functions of cracked thin plate are obtained by using the simply supported boundary conditions and the boundary conditions along the crack line.

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Satria, Orita, Dewi Elizadiani Suza, and Mula Tarigan. "Latihan Berjalan dengan Kontrol Pernapasan pada Penderita Penyakit Paru Obstruktif Kronik (PPOK): Studi Fenomenologi." Journal of Telenursing (JOTING) 4, no. 1 (2022): 342–53. http://dx.doi.org/10.31539/joting.v4i1.3621.

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This study aims to explore the experience of walking exercise with breathing control in COPD patients. The method used is qualitative with a descriptive phenomenological approach. Participants in this study amounted to 15 people with COPD. Data obtained from in-depth interviews, then analyzed using the Colaizzi method. The results showed that five themes were identified, namely: 1) the implementation of walking exercises with breathing control; 2) increased physical activity and quality of life; 3) increase oxygen demand and reduce shortness of breath; 4) reduce anxiety and improve sleep quali

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POLIVTSEV, V. P., and V. V. POLIVTSEV. "RESEARCH OF LIQUID RESPIRATION TECHNOLOGY BY THE METHOD OF IMMERSION/ASCENT OF A BIOLOGICAL OBJECT IN A HYDRAULIC CHAMBER WITH HIGH PRESSURE." Fundamental and Applied Problems of Engineering and Technology, no. 4 (2021): 183–89. http://dx.doi.org/10.33979/2073-7408-2021-348-4-183-189.

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The study of liquid respiration technology for the process of immersion/ascent of biological objects in the stand at depths of 500, 1000 and 1500 m is proposed. Safe modes and the depth of immersion/ascent of biological objects are studied. A hydraulic stand and a capsule for immersion/ascent of a biological object were developed and tested. The main characteristics of a hydraulic stand that simulates diving/surfacing to a depth of 1500 meters are given. Safe diving/surfacing modes and maximum diving depths on the spontaneous breathing of the dog are determined. The results of medical studies

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John David, Jemimah, and Harshada R Patil. "Immediate Effect of Buteyko Breathing Technique Versus Stacked Breathing Technique in Asthma Patients." International Journal of Health Sciences and Research 12, no. 6 (2022): 158–67. http://dx.doi.org/10.52403/ijhsr.20220621.

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Background: Asthma is one of the most common chronic diseases in the world. It is estimated that around 300 million people in the world currently have asthma. Hyperventilation is a major cause of hypoxemia in asthmatics. Buteyko shows increasing evidence that reduce ventilation may be benefit for many patients with asthma. Stacked breathing increases the volume of breath, helps to improve depth of breathing, helps improve rib cage mobility and flexibility, stretches respiratory muscles, improves cough strength and effectiveness. Purpose of Study: This study is conducted for the purpose of stud

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Romanchuk, A.P., K.S. Ternovoy, M.N. Glushchenko, V. Y. Bogachev, and M.Yu. Karganov. "UNREGULATED BREATHING FEATURES OF PATIENTS WITH SPINAL INJURY." Avtonomiya lichnosti 2012, no. 1 (2015): 123–26. https://doi.org/10.5281/zenodo.16417.

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In work the analysis of features of a pattern and variability of no controllable breath at persons with spinal traumas is carried out. It is shown, that at traumas of a backbone at patients’ duration of a breath and an exhalation, decreases frequency of breath increases. Further the analysis of spectral components of no controllable breath at persons with the moderate and expressed lengthening of a breath and an exhalation is carried out.

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Thom, Stephen R., Michael Bennett, Neil D. Banham, et al. "Association of microparticles and neutrophil activation with decompression sickness." Journal of Applied Physiology 119, no. 5 (2015): 427–34. http://dx.doi.org/10.1152/japplphysiol.00380.2015.

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Decompression sickness (DCS) is a systemic disorder, assumed due to gas bubbles, but additional factors are likely to play a role. Circulating microparticles (MPs)—vesicular structures with diameters of 0.1-1.0 μm—have been implicated, but data in human divers have been lacking. We hypothesized that the number of blood-borne, Annexin V-positive MPs and neutrophil activation, assessed as surface MPO staining, would differ between self-contained underwater breathing-apparatus divers suffering from DCS vs. asymptomatic divers. Blood was analyzed from 280 divers who had been exposed to maximum dep

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Ailamazyan, Aida M., and Ekaterina I. Tashkeeva. "BREATHABILITY (DYKHATEL’NOST’) AS A MEANS OF EXPRESSION IN THE PRACTICE OF MUSICAL MOVEMENT (BASED ON ARCHIVAL MATERIALS BY S.D. RUDNEVA)." RSUH/RGGU Bulletin. Series Psychology. Pedagogics. Education, no. 2 (2025): 10–31. https://doi.org/10.28995/2073-6398-2025-2-10-31.

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The article shows that breathing can be considered not only from a physiological perspective, but also from a psychological, aesthetic and artistic perspective. Such an approach to breathing is developed in various practices. The connection between breathing (its frequency, depth, rhythm) and person’s emotional reactions allows one to turn to it as a means of self-regulation, which opens up the opportunity not only to master one’s mood and control the level of excitement or to get rid of unwanted experiences, but also to generate certain emotional states in oneself. Psychological practice draw

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Subedi, Sugam, Urendra Prasad Joshi, and Prajwal Karki. "Ethical Leaders: Mindfulness Practices and Its Impact on the Strategic Choices." Management Dynamics 26, no. 2 (2023): 108–24. https://doi.org/10.3126/md.v26i2.72299.

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This study examines the relationship between mindfulness practices and strategic decision-making among ethical leaders in human resource management. A positivist, quantitative method is used to assess the influence of techniques such as mindful breathing, mindful technology usage, 3-minute breathing space, mental gym, and daily journaling on strategic decisions (vision formulation, plan design, and execution). Purposive sampling was used to acquire data from 235 Human Resource managers and assistants using a standardized questionnaire. Correlation coefficients reveal strong beneficial links be

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Prabha, K. C., D. G. Bernard, M. Gardner, and N. J. Smatresk. "Ventilatory mechanics and the effects of water depth on breathing pattern in the aquatic caecilian Typhlonectes natans." Journal of Experimental Biology 203, no. 2 (2000): 263–72. http://dx.doi.org/10.1242/jeb.203.2.263.

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The breathing pattern in the aquatic caecilian Typhlonectes natans was investigated by recording airflow via a pneumotachograph under unrestrained normal physiological conditions. Ventilatory mechanics were assessed using airflow and pressure measurements from the buccal cavity and trachea. The breathing pattern consisted of an expiratory phase followed by a series of 10–15 small buccal pumps to inflate the lung, succeeded by a long non-ventilatory period. T. natans separate the expiratory and inspiratory gases in the buccal cavity and take several inspiratory pumps, distinguishing their breat

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Vrijdag, Xavier CE, Hanna van Waart, Jamie W. Sleigh, Costantino Balestra, and Simon J. Mitchell. "Investigating critical flicker fusion frequency for monitoring gas narcosis in divers." Diving and Hyperbaric Medicine Journal 50, no. 4 (2020): 377–85. http://dx.doi.org/10.28920/dhm50.4.377-385.

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(Vrijdag XCE, van Waart H, Sleigh JW, Balestra C, Mitchell SJ. Investigating critical flicker fusion frequency for monitoring gas narcosis in divers. Diving and Hyperbaric Medicine. 2020 December 20;50(4):377–385. doi: 10.28920/dhm50.4.377-385. PMID: 33325019.) Introduction: Critical flicker fusion frequency (CFFF) has been used in various studies to measure the cognitive effects of gas mixtures at depth, sometimes with conflicting or apparently paradoxical results. This study aimed to evaluate a novel automatic CFFF method and investigate whether CFFF can be used to monitor gas-induced narcos

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Tomlinson, S. P., J. K. W. Lo, and D. G. Tilley. "Computer Simulation of Human Interaction with Underwater Breathing Equipment." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 208, no. 4 (1994): 249–61. http://dx.doi.org/10.1243/pime_proc_1994_208_295_02.

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A mathematical model of the human respiratory system is being developed in order to simulate manned diving operations using various types of breathing equipment. A simulation study is presented of a human diving to a depth of 50 m, using a semi-closed re-breathing system with two different oxygen flow settings. A gas supply with 32.5 per cent oxygen concentration results in a safe dive whereas a 60 per cent setting indicates a dangerous diving condition. Typical respiratory model input data are illustrated for the lung, together with dimensional details for the re-breathing counterlung. The si

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Zheng, Zhaoli, Yonghui Xie, Di Zhang, and Fahui Zhu. "Numerical investigation on the nonlinear dynamics of a breathing cracked rotor supported by flexible bearings." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 19-20 (2019): 6815–26. http://dx.doi.org/10.1177/0954406219866473.

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The steady-state response and breathing mechanism of a cracked rotor supported by flexible bearings are investigated in this paper. The generalized and efficient method proposed in this paper can be used to study the dynamics of complicated cracked structures without much modification. First, a three-dimensional finite element model of the cracked rotor-bearing system is established in the rotating frame and a general contact model for modeling the breathing crack is proposed. A component mode synthesis is used to form a reduced-order model. Then, a procedure combining multi-harmonic balance m

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Dale, Nicholas. "CO 2 sensing by connexin26 and its role in the control of breathing." Interface Focus 11, no. 2 (2021): 20200029. http://dx.doi.org/10.1098/rsfs.2020.0029.

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Breathing is essential to provide the O 2 required for metabolism and to remove its inevitable CO 2 by-product. The rate and depth of breathing is controlled to regulate the excretion of CO 2 to maintain the pH of arterial blood at physiological values. A widespread consensus is that chemosensory cells in the carotid body and brainstem measure blood and tissue pH and adjust the rate of breathing to ensure its homeostatic regulation. In this review, I shall consider the evidence that underlies this consensus and highlight historical data indicating that direct sensing of CO 2 also plays a signi

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Morris, Kendall F., Sarah C. Nuding, Lauren S. Segers, et al. "Carotid chemoreceptors tune breathing via multipath routing: reticular chain and loop operations supported by parallel spike train correlations." Journal of Neurophysiology 119, no. 2 (2018): 700–722. http://dx.doi.org/10.1152/jn.00630.2017.

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We tested the hypothesis that carotid chemoreceptors tune breathing through parallel circuit paths that target distinct elements of an inspiratory neuron chain in the ventral respiratory column (VRC). Microelectrode arrays were used to monitor neuronal spike trains simultaneously in the VRC, peri-nucleus tractus solitarius (p-NTS)-medial medulla, the dorsal parafacial region of the lateral tegmental field (FTL-pF), and medullary raphe nuclei together with phrenic nerve activity during selective stimulation of carotid chemoreceptors or transient hypoxia in 19 decerebrate, neuromuscularly blocke

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Kłos, Ryszard. "Classification of the underwater diving equipment." Polish Maritime Research 15, no. 1 (2008): 80–85. http://dx.doi.org/10.2478/v10012-007-0056-3.

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Classification of the underwater diving equipment In this paper was presented, innovative in preparation of the diving apparatuses classification method, depend on three criteria: the kind of the breathing gas, the operational depth range of the diving apparatus, and the principle of operation. The breathing gas used is the most important criterion. The other basic classification criteria follow from the first one; therefore it should be treated as the one criterion. Such approach to the problem has never been presented before, however it seems to be correct method of the diving apparatuses di

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Procházka, Aleš, Martin Schätz, Oldřich Vyšata, and Martin Vališ. "Microsoft Kinect Visual and Depth Sensors for Breathing and Heart Rate Analysis." Sensors 16, no. 7 (2016): 996. http://dx.doi.org/10.3390/s16070996.

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