Methods of dynamic spectral analysis by self-exciting autoregressive moving average models and their application to analysing biosignals.

abstract：:This study examined the electroencephalogram functional connectivity (coherence) and effective connectivity (flow of information) of selected brain regions during three different attentive states: awake, meditation and drowsiness. For the estimation of functional connectivity (coherence), Welch and minimum variance di...

journal_title：Medical & biological engineering & computing

authors： Dissanayaka C,Ben-Simon E,Gruberger M,Maron-Katz A,Sharon H,Hendler T,Cvetkovic D

更新日期：2015-07-01 00:00:00

abstract：:Tissue hardness is related to tissue composition, and this is often changed by disease. It is therefore of interest to measure the hardness in an objective and non-invasive way. A tactile sensor based on a vibrating piezoelectric ceramic element in a feedback loop is described. When the sensor touches an object it pro...

journal_title：Medical & biological engineering & computing

authors： Eklund A,Bergh A,Lindahl OA

更新日期：1999-09-01 00:00:00

abstract：:In this paper, a method for apnea bradycardia detection in preterm infants is presented based on coupled hidden semi Markov model (CHSMM). CHSMM is a generalization of hidden Markov models (HMM) used for modeling mutual interactions among different observations of a stochastic process through using finite number of hi...

journal_title：Medical & biological engineering & computing

authors： Montazeri Ghahjaverestan N,Shamsollahi MB,Ge D,Beuchée A,Hernández AI

更新日期：2021-01-01 00:00:00

abstract：:A simple objective screening method for diagnosis of the atrial septal defect (ASD) is needed. Acoustic signals were collected from 61 children with ASD and 60 with a physiological murmur. The second heart sound (S2) and the spectrum of systolic murmur were analysed. A statistical model was designed using stepwise log...

journal_title：Medical & biological engineering & computing

authors： El-Segaier M,Pesonen E,Lukkarinen S,Peters K,Ingemansson J,Sörnmo L,Sepponen R

更新日期：2006-09-01 00:00:00

abstract：:The role of alveolar macrophages in the process of the human lung clearance is summarised. Three patterns of alveolar macrophage (AM) displacement on the surface of alveolus are distinguished depending on the loading of the surface with insoluble deposits, i.e. directional, directional with small stochastic noise and ...

journal_title：Medical & biological engineering & computing

authors： Gradoń L,Podgórski A

更新日期：1995-07-01 00:00:00

abstract：:A compression algorithm for electrocardiogram signals is presented, based on an auto-associative neural network. Issues of weight and activation coding are considered, and compression performances of various network sizes are compared. A unique feature is the performance improvement achieved using DC level removal. A ...

journal_title：Medical & biological engineering & computing

authors： Hamilton DJ,Thomson DC,Sandham WA

更新日期：1995-11-01 00:00:00

abstract：:In three-dimensional reconstruction of the human spine obtained from stereo-radiographic set-ups (two radiographs or more), it is extremely difficult to identify exactly the same landmarks on all radiographs. The effect of these identification errors was investigated with simulations made on points of known three-dime...

journal_title：Medical & biological engineering & computing

authors： André B,Dansereau J,Labelle H

更新日期：1992-11-01 00:00:00

abstract：:This review is a commentary on recent, altered perspectives about biomedical engineering and its role in medicine. It is argued that, rather than being a peripheral specialty, medical engineering and engineering principles in general have a direct application to biochemical medicine and cell biology. A brief descripti...

journal_title：Medical & biological engineering & computing

authors： Vadgama P

更新日期：1992-07-01 00:00:00

abstract：:Electrocardiogram (ECG)-triggered laser Doppler perfusion monitoring (LDPM) was used to assess myocardial perfusion, with minimum myocardial tissue motion influence, during coronary artery bypass grafting (CABG). Thirteen subjects were investigated at six phases: pre- and post-CABG; post aorta cross-clamping; pre and ...

journal_title：Medical & biological engineering & computing

authors： Karlsson MG,Fors C,Wårdell K,Casimir-Ahn H

更新日期：2005-09-01 00:00:00

abstract：:A new method of quantifying dermal perfusion on a regional basis using a dynamic thermographic technique is investigated. The technique is based on the relationship between dermal perfusion and the rate of skin surface reheating following the application of a transient cold challenge predicted by a theoretical model. ...

journal_title：Medical & biological engineering & computing

authors： Wilson SB,Spence VA

更新日期：1989-09-01 00:00:00

abstract：:The development of an active implantable device for measuring electrocardiogram (ECG) is presented. The study is a part of a project which aims at developing implantable ECG instrumentation with wireless data and power transfer ( http://www.ele.tut.fi/tule ). The developed implant presented here has all the measuremen...

journal_title：Medical & biological engineering & computing

authors： Riistama J,Väisänen J,Heinisuo S,Harjunpää H,Arra S,Kokko K,Mäntylä M,Kaihilahti J,Heino P,Kellomäki M,Vainio O,Vanhala J,Lekkala J,Hyttinen J

更新日期：2007-12-01 00:00:00

abstract：:Quantitative analysis and detection of electroencephalogram (EEG) recordings during evoked activities is essential for clinical diagnosis on neurological disorders. However, the process of interpreting EEG is time consuming for electroencephalographers (EEGers). In this study, an automatic EEG interpretation system co...

journal_title：Medical & biological engineering & computing

authors： Zhang X,Wang X,Sugi T,Ikeda A,Nagamine T,Shibasaki H,Nakamura M

更新日期：2011-02-01 00:00:00

abstract：:A rapid-access but limited vocabulary communication aid for the non-vocal and speech impaired is useful in some well defined situations. The design and construction of such a device is described. Three distinct situations have been identified where an aid is essential and an initial evaluation has shown the Pocket Spe...

journal_title：Medical & biological engineering & computing

authors： Keating D,Smith DC,Evans AL,Wyper DJ,Cunningham E

更新日期：1989-05-01 00:00:00

abstract：:Full-night polysomnography (PSG) has been recognized as the gold standard test for sleep apnea-hypopnea syndrome (SAHS). However, PSG examinees are physically restrained for the full night by many contact sensors and obtrusive connecting cables, inducing mental stress. We developed a non-contact SAHS diagnostic system...

journal_title：Medical & biological engineering & computing

authors： Kagawa M,Tojima H,Matsui T

更新日期：2016-05-01 00:00:00

abstract：:The mechanism of brain contusion has been investigated using a series of three-dimensional (3D) finite element analyses. A head injury model was used to simulate forward and backward rotation around the upper cervical vertebra. Intracranial pressure and shear stress responses were calculated and compared. The results ...

journal_title：Medical & biological engineering & computing

authors： Huang HM,Lee MC,Lee SY,Chiu WT,Pan LC,Chen CT

更新日期：2000-05-01 00:00:00

abstract：:The problem of excess cerebrospinal fluid in the brain (hydrocephalus) is generally managed using a passive pressure or flow regulated mechanical shunt. Despite the success of such devices, they have been plagued with a number of problems. It is desirable to have a shunt valve that responds dynamically to the changing...

journal_title：Medical & biological engineering & computing

authors： Momani L,Al-Nuaimy W,Al-Jumaily M,Mallucci C

更新日期：2011-01-01 00:00:00

abstract：:During dialysis the ion concentrations in many body fluids change significantly. The influence of these changes on the accuracy of volume measurements with bioimpedance spectroscopy is investigated by the following procedure: Plasma ion concentrations and impedance spectra (5-500 kHz) are measured during six standard ...

journal_title：Medical & biological engineering & computing

authors： Scharfetter H,Wirnsberger GH,Holzer H,Hutten H

更新日期：1997-03-01 00:00:00

abstract：:Axial and transverse components of liquid velocity are measured by laser Doppler anemometer in a perspex tube that has been deformed at one point to resemble the shape of the throat of a partially collapsed flexible tube, conveying fluid while being compressed externally. The Reynolds number is 5900. The flow down-str...

journal_title：Medical & biological engineering & computing

authors： Bertram CD,Muller M,Ramus F,Nugent AH

更新日期：2001-07-01 00:00:00

abstract：:Cardiotocography is the most diffused prenatal diagnostic technique in clinical routine. The simultaneous recording of foetal heart rate (FHR) and uterine contractions (UC) provides useful information about foetal well-being during pregnancy and labour. However, foetal electronic monitoring interpretation still lacks ...

journal_title：Medical & biological engineering & computing

authors： Romano M,Bifulco P,Cesarelli M,Sansone M,Bracale M

更新日期：2006-03-01 00:00:00

abstract：:Obstructive sleep apnea syndrome (OSAS) is a major public health problem. The golden reference for diagnosing OSAS is the sleep-laboratory based polysomnography (PSG). However, screening of population for OSAS may be practical and cost efficient only through ambulatory home recordings. In this work we aimed to design,...

journal_title：Medical & biological engineering & computing

authors： Tiihonen P,Pääkkönen A,Mervaala E,Hukkanen T,Töyräs J

更新日期：2009-01-01 00:00:00

abstract：:It is of great importance to effectively process and interpret surface electromyogram (sEMG) signals to actuate a robotic and prosthetic exoskeleton hand needed by hand amputees. In this paper, we have proposed a cepstrum analysis-based method for classification of basic hand movement sEMG signals. Cepstral analysis t...

journal_title：Medical & biological engineering & computing

authors： Yavuz E,Eyupoglu C

更新日期：2019-10-01 00:00:00

abstract：:Greater trochanter (GT) stabilization techniques following a fracture or an osteotomy are still showing high levels of postoperative complications. Understanding the effect of femoral neck cut placement, cable tension and muscles forces on GT fragment displacements could help surgeons optimize their techniques. A 3D f...

journal_title：Medical & biological engineering & computing

authors： Petit Y,Cloutier LP,Duke K,Laflamme GY

更新日期：2012-04-01 00:00:00

abstract：:In acute experiments the sciatic nerve of the rat is electrically stimulated to induce fatigue in the medial Gastrocnemius muscle. Fatigue tests are carried out using intermittent stimulation of different compartments (sequential) or a single compartment (synchronous) of the sciatic nerve. The activation of different ...

journal_title：Medical & biological engineering & computing

authors： Thomsen M,Veltink PH

更新日期：1997-05-01 00:00:00

abstract：:A novel laser Doppler flowmetry scheme is reported that adjusts the processing bandwidth adaptively to optimise the estimation of flow. To obtain an adequate processing bandwidth, the Doppler spectra is first fitted to the Lorentzian function, and the bandwidth at half the maximum of the Lorentzian function is used as...

journal_title：Medical & biological engineering & computing

authors： Chen YY,Lin YH,Jan IC,Liu RS,Chou NK,Jan GJ

更新日期：2004-05-01 00:00:00

abstract：:Conduct disorder (CD) is an important mental health problem in childhood and adolescence. There is presently a trend of revealing neural mechanisms using measures of brain networks. This study goes further by presenting a classification scheme to distinguish subjects with CD from typically developing healthy subjects ...

journal_title：Medical & biological engineering & computing

authors： Zhang J,Liu Y,Luo R,Du Z,Lu F,Yuan Z,Zhou J,Li S

更新日期：2020-09-01 00:00:00

abstract：:Steady-state visual evoked potentials (SSVEPs) are widely employed in brain-computer interface (BCI) applications, especially to control machines. However, the use of SSVEPs leads to eye fatigue and causes lower accuracy over the long term, particularly when multi-commands are required. Therefore, this paper proposes ...

journal_title：Medical & biological engineering & computing

authors： Punsawad Y,Wongsawat Y

更新日期：2017-06-01 00:00:00

abstract：:Fluctuation analysis has great potential to contribute to pulmonary clinical science and practice. We evaluated the relationship between asthma and the respiratory impedance recurrence period density entropy (RPDEnZrs) and the variability (SDZrs). A non-invasive and simple protocol for assessing respiratory mechanics ...

journal_title：Medical & biological engineering & computing

authors： Veiga J,Lopes AJ,Jansen JM,Melo PL

更新日期：2012-12-01 00:00:00

abstract：:Induction coils were fabricated based on flexible printed circuit board for inductive transcutaneous power transmission. The coil had closed magnetic circuit (CMC) structure consisting of inner and outer magnetic core. The power transmission efficiency of the fabricated device was measured in the air and in vivo condi...

journal_title：Medical & biological engineering & computing

authors： Jo SE,Joung S,Suh JK,Kim YJ

更新日期：2012-09-01 00:00:00

abstract：:Even though the World Health Organization criteria's for classifying the dengue infection have been used for long time, recent studies declare that several difficulties have been faced by the clinicians to apply these criteria. Accordingly, many studies have proposed modified criteria to identify the risk in dengue pa...

journal_title：Medical & biological engineering & computing

authors： Faisal T,Taib MN,Ibrahim F

更新日期：2010-03-01 00:00:00

abstract：:Dislocation is a serious potential complication of total hip replacement. Previous studies have proposed a newly developed total hip structure that meets the required oscillation angle of 120°, for which the chamfer on the acetabular liner rim was designed to enable the neck to impinge on the chamfer over a large area...

journal_title：Medical & biological engineering & computing

authors： Chi WM,Lin CC,Ho YJ,Lin HC,Chen JH

更新日期：2018-01-01 00:00:00