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Wyniki wyszukiwania dla: ACQUIRED BRAIN INJURIES

Wyniki wyszukiwania dla: ACQUIRED BRAIN INJURIES

  • Assessment of Therapeutic Progress After Acquired Brain Injury Employing Electroencephalography and Autoencoder

    Publikacja

    A method developed for parametrization of EEG signals gathered from participants with acquired brain injuries is shown. Signals were recorded during therapeutic session consisting of a series of computer assisted exercises. Data acquisition was performed in a neurorehabilitation center located in Poland. The presented method may be used for comparing the performance of subjects with acquired brain injuries (ABI) who are involved...

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  • Brain Injuries

    One of the first clinical signs differentiating the minimally conscious state from the vegetative state is the presence of smooth pursuit eye movements occurring in direct response to moving salient stimuli. Glasgow Coma Scale (GCS) is one of the most commonly used diagnostic tools for acute phase assessment of the level of consciousness, together with a neurological examination. These classic measures are limited to qualitative...

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  • A Study in Experimental Methods of Human-Computer Communication for Patients After Severe Brain Injuries

    Publikacja

    Experimental research in the domain of multimedia technology applied to medical practice is discussed, employing a prototype of integrated multimodal system to assist diagnosis and polysensory stimulation of patients after severe brain injury. The system being developed includes among others: eye gaze tracker, and EEG monitoring of non-communicating patients after severe brain injuries. The proposed solutions are used for collecting...

  • Multimodal Approach For Polysensory Stimulation And Diagnosis Of Subjects With Severe Communication Disorders

    Publikacja

    is evaluated on 9 patients, data analysis methods are described, and experiments of correlating Glasgow Coma Scale with extracted features describing subjects performance in therapeutic exercises exploiting EEG and eyetracker are presented. Performance metrics are proposed, and k-means clusters used to define concepts for mental states related to EEG and eyetracking activity. Finally, it is shown that the strongest correlations...

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  • Automatic Clustering of EEG-Based Data Associated with Brain Activity

    The aim of this paper is to present a system for automatic assigning electroencephalographic (EEG) signals to appropriate classes associated with brain activity. The EEG signals are acquired from a headset consisting of 14 electrodes placed on skull. Data gathered are first processed by the Independent Component Analysis algorithm to obtain estimates of signals generated by primary sources reflecting the activity of the brain....

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  • Assessment of hearing in coma patients employing auditory brainstem response, electroencephalography, and eye-gaze-tracking

    The results of the study conducted by Tagliaferri et al. in 12 European countries indicate that the ratio of registered brain injury cases in Europe amounts to 150-300 per 100 000 people, with the European mean value of 235 cases per 100 000 people. The project presented in the paper assumes development of a combined metric of patients’ state remaining in coma by intelligent fusion of GCS (subjective Glasgow Coma Scale or its derivatives)...

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  • Problems in estimation of hand grip force based on EMG signal

    Publikacja

    - Diagnostyka - 2015

    There has recently been a significant increase in the number of publications on and applications of bioelectric signals for diagnostic purposes. While the use of ECG (electrocardiography) is not surprising, the use of signals from registration of brain activity (EEG) and muscles activity (EMG) still finds new applications in various fields. The authors focus on the use of EMG signals for estimating hand grip force. Currently,...

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  • An IoT-Based Computational Framework for Healthcare Monitoring in Mobile Environments

    Publikacja

    - SENSORS - 2017

    The new Internet of Things paradigm allows for small devices with sensing, processing and communication capabilities to be designed, which enable the development of sensors, embedded devices and other ‘things’ ready to understand the environment. In this paper, a distributed framework based on the internet of things paradigm is proposed for monitoring human biomedical signals in activities involving physical exertion. The main...

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  • Carotid Artery Stenting and Blood–Brain Barrier Permeability in Subjects with Chronic Carotid Artery

    Publikacja
    • A. Szarmach
    • G. Halena
    • M. Kaszubowski
    • M. Piskunowicz
    • M. Studniarek
    • P. Lass
    • E. Szurowska
    • P. Winklewski

    - INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES - 2017

    Failure of the blood-brain barrier (BBB) is a critical event in the development and progression of diseases such as acute ischemic stroke, chronic ischemia or small vessels disease that affect the central nervous system. It is not known whether BBB breakdown in subjects with chronic carotid artery stenosis can be restrained with postoperative recovery of cerebral perfusion. The aim of the study was to assess the short-term effect...

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  • New method to monitor changes in the subarachnoid width and pial artery pulsation for physiological and clinical research

    Publikacja

    - JOURNAL OF PHYSIOLOGY AND PHARMACOLOGY - 2014

    There are several medical conditions associated with brain oedema such as traumatic brain injury, intoxication or tumors. Brain edema and related brain parenchyma expansion may lead to compression and subsequent injury of several brain structures. So far, the only method enabling detection and monitoring of the progress a cerebral oedema in a patient, has been monitoring of intracranial pressure (ICP) with a pressure probe inserted...

  • The Brain of the city

    Publikacja
    • Z. Aferdita
    • L. Aleksandra
    • V. Milutin
    • A. Nataly
    • W. Mazurkiewicz
    • J. Cazorla
    • L. Adrianna
    • N. Anita
    • R. Kamil

    - 2017

    In order to highlight the characteristics of the West End of Wrocław, we conducted a site analysis. Using the strengths of the site, we were able to create a unique concept of the district while minimizing the impacts of weaknesses by design. The purpose of redesigning the West End of Wrocław is to attract new people to the district through the transformation of an identity. Initially, we conducted a SWOT analysis to identify the...

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  • Human memory enhancement through electrical stimulation in the temporal cortex

    Publikacja
    • M. Kucewicz
    • B. Berry
    • L. Miller
    • F. Khadjevand
    • Y. Ezzyat
    • J. Stein
    • V. Kremen
    • B. Brinkmann
    • P. Wanda
    • M. Sperling
    • R. Gorniak
    • K. Davis
    • B. Jobst
    • R. Gross
    • B. Lega
    • J. Gompel
    • M. Stead
    • D. Rizzuto
    • M. Kahana
    • G. Worrell

    - Brain: A Journal of Neurology - 2018

    Direct electrical stimulation of the human brain can elicit sensory and motor perceptions as well as recall of memories. Stimulating higher order association areas of the lateral temporal cortex in particular was reported to activate visual and auditory memory representations of past experiences (Penfield and Perot, 1963). We hypothesized that this effect could be used to modulate memory processing. Recent attempts at memory enhancement...

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  • Widespread theta synchrony and high-frequency desynchronization underlies enhanced cognition

    Publikacja
    • E. Solomon
    • J. Kragiel
    • M. Sperling
    • A. Sharan
    • G. Worrell
    • M. Kucewicz
    • C. Inman
    • B. Lega
    • K. Davis
    • J. Stein
    • B. Jobst
    • K. Zaghloul
    • S. Sheth
    • D. Rizzuto
    • M. Kahana

    - Nature Communications - 2017

    The idea that synchronous neural activity underlies cognition has driven an extensive body of research in human and animal neuroscience. Yet, insufficient data on intracranial electrical connectivity has precluded a direct test of this hypothesis in a whole-brain setting. Through the lens of memory encoding and retrieval processes, we construct whole-brain connectivity maps of fast gamma (30-100 Hz) and slow theta (3-8 Hz) spectral...

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  • Employing a biofeedback method based on hemispheric synchronization in effective learning

    In this paper an approach to build a brain computer-based hemispheric synchronization system is presented. The concept utilizes the wireless EEG signal registration and acquisition as well as advanced pre-processing methods. The influence of various filtration techniques of EOG artifacts on brain state recognition is examined. The emphasis is put on brain state recognition using band pass filtration for separation of individual...

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  • Prototype of an opto-capacitive probe for non-invasive sensing cerebrospinal fluid circulation

    Publikacja

    - 2017

    In brain studies, the function of the cerebrospinal fluid (CSF) awakes growing interest, particularly related to studies of the glymphatic system in the brain, which is connected with the complex system of lymphatic vessels responsible for cleaning the tissues. The CSF is a clear, colourless liquid including water (H2O) approximately with a concentration of 99 %. In addition, it contains electrolytes, amino acids, glucose, and...

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  • Krzysztof Goczyła prof. dr hab. inż.

    Krzysztof Goczyła, profesor zwyczajny Politechniki Gdańskiej, informatyk, specjalista z inżynierii oprogramowania, inżynierii wiedzy i baz danych. Ukończył studia wyższe na  Wydziale Elektroniki Politechniki Gdańskiej w 1976 r. jako magister inżynier elektronik w specjalności automatyka. Na Politechnice Gdańskiej pracuje od 1976. Na Wydziale Elektroniki PG w 1982 r. uzyskał doktorat z informatyki, a w 1999 r. habilitację. W 2012...

  • Interictal high-frequency oscillations in focal human epilepsy

    Publikacja

    - CURRENT OPINION IN NEUROLOGY - 2016

    PURPOSE OF REVIEW: Localization of focal epileptic brain is critical for successful epilepsy surgery and focal brain stimulation. Despite significant progress, roughly half of all patients undergoing focal surgical resection, and most patients receiving focal electrical stimulation, are not seizure free. There is intense interest in high-frequency oscillations (HFOs) recorded with intracranial electroencephalography as potential...

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  • Pathological brain network activity: memory impairment in epilepsy

    Publikacja

    - NEUROLOGY - 2013

    Our thinking, memory and cognition in general, relies upon precisely timed interactions among neurons forming brain networks that support cognitive processes. The surgical evaluation of drug-resistant epilepsy using intracranial electrodes provides a unique opportunity to record directly from human brain and to investigate the coordinated activity of cognitive networks. In this issue of Neurology®, Kleen and colleagues1 implicate...

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  • Direct brain stimulation modulates encoding states and memory performance in humans

    Publikacja
    • Y. Ezzyat
    • J. Kragel
    • J. Burke
    • D. Levy
    • A. Lyalenko
    • P. Wanda
    • L. O'Sullivan
    • K. Hurley
    • S. Busygin
    • I. Pedisich
    • M. Sperling
    • G. Worrell
    • M. Kucewicz
    • K. Davis
    • T. Lucas
    • C. Inman
    • B. Lega
    • B. Jobst
    • S. Sheth
    • K. Zaghloul
    • M. Jutras
    • J. Stein
    • S. Das
    • R. Gorniak
    • D. Rizzuto
    • M. Kahana

    - CURRENT BIOLOGY - 2017

    People often forget information because they fail to effectively encode it. Here, we test the hypothesis that targeted electrical stimulation can modulate neural encoding states and subsequent memory outcomes. Using recordings from neurosurgical epilepsy patients with intracranially implanted electrodes, we trained multivariate classifiers to discriminate spectral activity during learning that predicted remembering from forgetting,...

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  • Human verbal memory encoding is hierarchically distributed in a continuous processing stream

    Publikacja
    • M. Kucewicz
    • K. Saboo
    • B. Berry
    • V. Kremen
    • L. Miller
    • F. Khadjevand
    • C. Inman
    • P. Wanda
    • M. Sperling
    • R. Gorniak
    • K. Davis
    • B. Jobst
    • B. Lega
    • S. Sheth
    • D. Rizzuto
    • R. Iyer
    • M. Kahana
    • G. Worrell

    - eNeuro - 2019

    Processing of memory is supported by coordinated activity in a network of sensory, association, and motor brain regions. It remains a major challenge to determine where memory is encoded for later retrieval. Here we used direct intracranial brain recordings from epilepsy patients performing free recall tasks to determine the temporal pattern and anatomical distribution of verbal memory encoding across the entire human cortex. High...

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  • Just Let Me Think: Designing Against Acquired Illiteracy.

    Publikacja

    - 2014

    This article concerns the relatively new problem of illiteracy relating to persons previously being literate, which is caused by too intensive using of so-called digital media (TV, computers, tablets, smartphones, e-book readers, portable media players, etc.). The problem has been observed for several years mainly in countries with high economic and technological development. The widespread use of digital media and the ease of...

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  • Interdisciplinary Design Teams in Poland - Architecture as a Tool for Preventing Hospital-Acquired Infections

    Hospital-acquired infections pose a problem, which directly affects the safe usage of healthcare facilities. On a global scale, the level of hospital-acquired infections (HAI) is estimated to affect 5–15% of those hospitalised. The World Health Organization (WHO) estimates that, on an annual basis, procedures preventing hospital-acquired infections consume 80 billion dollars [1]. In this context, it becomes important to create...

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  • Systemic approach to modelling the human brain

    Publikacja

    W prezentacji przedstawia się ogólną koncepcję w pełni autonomicznego systemu decyzyjnego dla robota (awatara, linguabota), zdolnego reagować na bodźce ze środowiska oraz opartego na opracowanym matematycznym modelu psychologii poznawczej człowieka, z elementami psychologii osobowości., uwzględniającymi 'potrzeby', 'emocje', 'nastrój' oraz elementy 'woli'.

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  • Selektywne chłodzenie mózgu noworodka po Niedotlenieniu okołoporodowym. Część 1. Medyczne fakty oraz przegląd dostępnych rozwiązań systemów selektywnego chłodzenia mózgu

    Mózg ludzki jest organem delikatnym, dlatego tak ważne jest zadbanie o to, aby już w momencie przyjścia na świat noworodek miał zapewnioną, w razie konieczności możliwość minimalizacji uszkodzeń neurologicznych, spowodowanych niedotlenieniem okołoporodowym. Niedotlenienie to w dramatyczny sposób zaburza homeostazę mózgu, który jako organ najbardziej energochłonny potrzebuje najwięcej tlenu. Zapoczątkowane brakiem tlenu procesy...

  • Behavioral state classification in epileptic brain using intracranial electrophysiology

    Publikacja
    • V. Kremen
    • J. Duque
    • B. Brinkmann
    • B. Berry
    • M. Kucewicz
    • F. Khadjevand
    • J. Van Gompel
    • M. Stead
    • E. St.louis
    • G. Worrell

    - Journal of Neural Engineering - 2017

    OBJECTIVE: Automated behavioral state classification can benefit next generation implantable epilepsy devices. In this study we explored the feasibility of automated awake (AW) and slow wave sleep (SWS) classification using wide bandwidth intracranial EEG (iEEG) in patients undergoing evaluation for epilepsy surgery. APPROACH: Data from seven patients (age [Formula: see text], 4 women) who underwent intracranial depth electrode...

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  • Combined Single Neuron Unit Activity and Local Field Potential Oscillations in a Human Visual Recognition Memory Task

    Publikacja
    • M. Kucewicz
    • B. Berry
    • M. Bower
    • J. Cymbalnik
    • V. Svehlik
    • S. Stead
    • G. Worrell

    - IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING - 2016

    GOAL: Activities of neuronal networks range from action potential firing of individual neurons, coordinated oscillations of local neuronal assemblies, and distributed neural populations. Here, we describe recordings using hybrid electrodes, containing both micro- and clinical macroelectrodes, to simultaneously sample both large-scale network oscillations and single neuron spiking activity in the medial temporal lobe structures...

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  • High frequency oscillations are associated with cognitive processing in human recognition memory

    Publikacja
    • M. Kucewicz
    • J. Cymbalnik
    • J. Matsumoto
    • B. Brinkmann
    • M. Bower
    • V. Vasoli
    • V. Sulc
    • F. Meyer
    • W. Marsh
    • S. Stead
    • G. Worrell

    - Brain: A Journal of Neurology - 2014

    High frequency oscillations are associated with normal brain function, but also increasingly recognized as potential biomarkers of the epileptogenic brain. Their role in human cognition has been predominantly studied in classical gamma frequencies (30-100 Hz), which reflect neuronal network coordination involved in attention, learning and memory. Invasive brain recordings in animals and humans demonstrate that physiological oscillations...

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  • Sweet grass protection against oxidative stress formation in the rat brain

    Publikacja
    • W. Łuczaj
    • I. Jarocka-Karpowicz
    • K. Bielawska
    • E. Skrzydlewska

    - METABOLIC BRAIN DISEASE - 2015

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  • Dissecting gamma frequency activities during human memory processing

    Publikacja
    • M. Kucewicz
    • B. Berry
    • V. Kremen
    • B. Brinkmann
    • M. Sperling
    • B. Jobst
    • R. Gross
    • B. Lega
    • S. Sheth
    • J. Stein
    • S. Das
    • R. Gorniak
    • S. Stead
    • D. Rizzuto
    • M. Kahana
    • G. Worrell

    - Brain: A Journal of Neurology - 2017

    Gamma frequency activity (30-150 Hz) is induced in cognitive tasks and is thought to reflect underlying neural processes. Gamma frequency activity can be recorded directly from the human brain using intracranial electrodes implanted in patients undergoing treatment for drug-resistant epilepsy. Previous studies have independently explored narrowband oscillations in the local field potential and broadband power increases. It is not...

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  • Network oscillations modulate interictal epileptiform spike rate during human memory

    Publikacja
    • J. Matsumoto
    • M. Stead
    • M. Kucewicz
    • A. Matsumoto
    • P. Peters
    • B. Brinkmann
    • J. Danstrom
    • S. Goerss
    • W. Marsh
    • F. Meyer
    • G. Worrell

    - Brain: A Journal of Neurology - 2013

    Eleven patients being evaluated with intracranial electroencephalography for medically resistant temporal lobe epilepsy participated in a visual recognition memory task. Interictal epileptiform spikes were manually marked and their rate of occurrence compared between baseline and three 2 s periods spanning a 6 s viewing period. During successful, but not unsuccessful, encoding of the images there was a significant reduction in...

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  • Gamma oscillations precede interictal epileptiform spikes in the seizure onset zone

    Publikacja
    • L. Ren
    • M. Kucewicz
    • J. Cymbalnik
    • J. Matsumoto
    • B. Brinkmann
    • W. Hu
    • W. Marsh
    • F. Meyer
    • S. Stead
    • G. Worrell

    - NEUROLOGY - 2015

    OBJECTIVE: To investigate the generation, spectral characteristics, and potential clinical significance of brain activity preceding interictal epileptiform spike discharges (IEDs) recorded with intracranial EEG. METHODS: Seventeen adult patients with drug-resistant temporal lobe epilepsy were implanted with intracranial electrodes as part of their evaluation for epilepsy surgery. IEDs detected on clinical macro- and research microelectrodes...

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  • Validity of MRI brain perfusion imaging method

    W artykule zaprezentowano zbiór analiz dotyczących walidacji metody DSC-MRI. Zbadano wpływ rozmycia, opóźnienia, niskiego SNR bolusa oraz innych możliwych źródeł zakłócających wartość parametru perfuzji. Różne metody uzyskiwania parametrów perfuzji zostały zaprezentowane i porównane.

  • Validity of MRI brain perfusion imaging method

    Publikacja

    W artykule zaprezentowano zbiór analiz dotyczących walidacji metody DSC-MRI. Zbadano wpływ rozmycia, opóźnienia, niskiego SNR bolusa oraz innych możliwych źródeł zakłócających wartość parametru perfuzji. Różne metody uzyskiwania parametrów perfuzji zostały zaprezentowane i porównane.

  • Limitations of DSC-MRI for quantitative brain perfusion.

    Publikacja

    - 2004

    Artykuł przedstawia ograniczenia metody DSC-MRI w ilościowej ocenie przepływów mózgowych. W zakresie pięciu różnych grup zagadnień przeprowadzono testy symulacyjne oraz obliczenia na podstawie badań fantomowych i in-vivo. Pokazano i omówiono wyniki badań.

  • Analysis and comparision of safety of children and adult passanger in car based on crash tests results

    Publikacja

    This paper presents analysis and comparision of safety of children and adult passanger in car based on crash tests results. The car crash test with four dummies, including two car seats allowed a direct comparison of the security under the same conditions of children and passengers directly to the car seat. Analysis of acceleration and video from the test allows to understand the phenomena during the collision, the air bags influence,...

  • A Device for Measuring Auditory Brainstem Responses to Audio

    Standard ABR devices use clicks and tone bursts to assess subjects’ hearing in an objective way. A new device was developed that extends the functionality of a standard ABR audiometer by collecting and analyzing auditory brainstem responses (ABR). The developed accessory allows for the use of complex sounds (e.g., speech or music excerpts) as stimuli. Therefore, it is possible to find out how efficiently different types of sounds...

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  • The new concept of product. Cooling band

    Publikacja

    - 2012

    The chapter below presents the innovative solution consist in applying the cooling band to help holding the hot object. The solution was found through substitute inputs analysis and brain storm method. The new product was submitted in Polish Patent Office under the No. W.120905.

  • Closed-loop stimulation of temporal cortex rescues functional networks and improves memory

    Publikacja
    • Y. Ezzyat
    • P. Wanda
    • D. Levy
    • A. Kadel
    • A. Aka
    • I. Pedisich
    • M. Sperling
    • A. Sharan
    • B. Lega
    • A. Burks
    • R. Gross
    • C. Inman
    • B. Jobst
    • M. Gorenstein
    • K. Davis
    • G. Worrell
    • M. Kucewicz
    • J. Stein
    • R. Gorniak
    • S. Das
    • D. Rizzuto
    • M. Kahana

    - Nature Communications - 2018

    Memory failures are frustrating and often the result of ineffective encoding. One approach to improving memory outcomes is through direct modulation of brain activity with electrical stimulation. Previous efforts, however, have reported inconsistent effects when using open-loop stimulation and often target the hippocampus and medial temporal lobes. Here we use a closed-loop system to monitor and decode neural activity from direct...

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  • Validating data acquired with experimental multimodal biometric system installed in bank branches

    An experimental system was engineered and implemented in 100 copies inside a real banking environment comprising: dynamic handwritten signature verification, face recognition, bank client voice recognition and hand vein distribution verification. The main purpose of the presented research was to analyze questionnaire responses reflecting user opinions on: comfort, ergonomics, intuitiveness and other aspects of the biometric enrollment...

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  • Pathological and physiological high-frequency oscillations in focal human epilepsy

    Publikacja
    • A. Matsumoto
    • B. Brinkmann
    • S. Stead
    • J. Matsumoto
    • M. Kucewicz
    • W. Marsh
    • F. Meyer
    • G. Worrell

    - JOURNAL OF NEUROPHYSIOLOGY - 2013

    High-frequency oscillations (HFO; gamma: 40-100 Hz, ripples: 100-200 Hz, and fast ripples: 250-500 Hz) have been widely studied in health and disease. These phenomena may serve as biomarkers for epileptic brain; however, a means of differentiating between pathological and normal physiological HFO is essential. We categorized task-induced physiological HFO during periods of HFO induced by a visual or motor task by measuring frequency,...

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  • Parametric imaging in dynamic glucose metabolism studies in brain

    Publikacja

    Artykuł analizuje badania dynamiczne 18FDG-PET, które służą do estymacji metabolizmu glukozy w mózgu. Zbadano w nim wpływ zakłóceń na wyznaczanie interesującego nas parametru LCMRGlc.

  • Acute hypoxia diminishes the relationship between blood pressure and subarachnoid space width oscillations at the human cardiac frequency

    Publikacja
    • M. Wszędybył-Winklewska
    • J. Wolf
    • E. Świerblewska
    • K. Kunicka
    • A. Gruszecka
    • M. Gruszecki
    • W. Kucharska
    • P. Winklewski
    • J. Zabulewicz
    • W. Gumiński
    • M. Pietrewicz
    • A. Frydrychowski
    • L. Bieniaszewski
    • K. Narkiewicz

    - PLOS ONE - 2017

    Acute hypoxia exerts strong effects on the cardiovascular system. Heart-generated pulsatile cerebrospinal fluid motion is recognised as a key factor ensuring brain homeostasis. We aimed to assess changes in heart-generated coupling between blood pressure and subarachnoid space width oscillations during hypoxic exposure.

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  • Optical properties of the chemotherapy drugs used in the central nervous system lymphoma therapy: monitoring drug delivery

    Publikacja

    - 2015

    Our aim is to optically monitor the delivery of the chemotherapy drugs for brain tumours, particularly used in the central nervous system (CNS) lymphoma therapy. In vivo monitoring would help to optimize the treatment and avoiding unnecessary medications. Moreover, it would be beneficial to be able to measure which of the multi-regimen drugs actually do penetrate and how well into the brain tissue. There exist several potential...

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  • STEADY STATE VISUALLY EVOKED POTENTIALS FOR BRAIN COMPUTER INTERFACE

    Publikacja

    An experiment conducted to validate a possibility of use a single active electrode EEG device for detecting Steady State Visually Evoked Potentials (SSVEP) is shown. A LED stimulator was applied to stimulate patients with two different frequencies - 13 Hz and 17 Hz. First, EEG signals were recorded and pre-processed using MATLAB software. In the next step recordings were analysed and classified employing the WEKA software. As indicated...

  • Development of tools for road infrastructure safety management for the provinces (voivodeships) in Poland

    The development of modern tools for road infrastructure safety management will help to reduce the number of fatalities and serious injuries as one of the main objectives adopted in 2013 in the National Road Safety Programme 2014-2020 and the new Road Safety Programme 2011-2020 in the EU. Risk Management in Highway Engineering can be applied in developing tools essential in the process of safety management. Risk Management in Highway...

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  • Bringing Common Sense to WordNet with a Word Game

    Publikacja

    We present a tool for common sense knowledge acquisition in form of a twenty questions game. The described approach uses WordNet dictionary, which rich taxonomy allows to keep cognitive economy and accelerate knowledge propagation, although sometimes inferences made on hierarchical relations result in noise. We extend the dictionary with common sense assertions acquired during the games played with humans. The facts added to the...

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  • On the low-cost design of abbreviated multisection planar matching transformer

    A numerically demanding wideband matching transformer composed of three nonuniform transmission lines (NUTLs) has been designed and optimized at a low computational cost. The computational feasibility of the design has been acquired through the exploitation of low-fidelity NUTL models in most steps of the design procedure and an implicit space mapping optimization engine, providing high accuracy results with only a handful of EM...

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  • Selektywne chłodzenie mózgu noworodka po niedotlenieniu okołoporodowym. Cześć 2. Koncepcja hybrydowego systemu selektywnego chłodzenia mózgu noworodka

    Mózg ludzki jest organem delikatnym, dlatego tak ważne jest zadbanie o to, aby już w momencie przyjścia na świat noworodek miał zapewnioną, w razie konieczności możliwość minimalizacji uszkodzeń neurologicznych, spowodowanych niedotlenieniem okołoporodowym. Niedotlenienie to w dramatyczny sposób zaburza homeostazę mózgu, który jako organ najbardziej energochłonny potrzebuje najwięcej tlenu. Zapoczątkowane brakiem tlenu procesy...

  • Brain perfusion imaging with the use of parametric modelling basing on DSC-MRI data

    Publikacja

    - 2008

    W pracy do estymacji parametrów perfuzji mózgu: przepływu krwi mózgowej (cerebral blood flow, CBF), objętości krwi mózgowej (cerebral blood volume, CBV) oraz średniego czasu przejścia (mean transit time, MTT) wykorzystano pomiary DSC-MRI (Dynamic Susceptibility Contrast Magnetic Resonance Imaging). W modelowaniu danych MRI zastoswoano model trzykompartmentowy. Przedstawiono i porównano dwa podejścia do identyfikacji modelu różniące...

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  • Modeling of subarachnoid space width change caused by blood circulation in brain vessels

    Publikacja

    The subarachnoid space is an anatomic space, lying in the central nervous system, between the arachnoid membrane and the pia mater. It is filled with cerebrospinal fluid, which protects and nourishes the brain. The pathological disorder of the subarachnoid space (i.e. increase or decrease of its width) a ects the nervous system. Therefore, it is important to diagnose the width changes of the subarachnoid space. One way to support...

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