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Search Results: 1 - 10 of 2062 matches for " Ioannis Kouroumichakis "
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Effect of Exercise on Gait Mechanics in a Patient with Severe Gait Disorder Due to Chronic Ischaemic Stroke: A Case Study  [PDF]
Stella Fotiadou, Ioannis Kouroumichakis, Thomas Besios, Nikolaos Papanas, Erasmia Giannakou, Vassilis Gourgoulis, Nikolaos Aggeloussis
Neuroscience & Medicine (NM) , 2019, DOI: 10.4236/nm.2019.104023
Abstract: We describe the effects of an exercise programme based on the American Heart Association and American Stroke Association guidelines for stroke patients on gait mechanics in a patient with severe gait disorder due to chronic ischaemic stroke. A 74-year-old female patient, with right hemiparesis as a result of a stroke attack before 18 months followed an 8-week exercise programme, consisting of three hourly sessions per week. Patient’s gait mechanics were evaluated before and after the intervention using a three-dimensional gait analysis system, with six infrared cameras, two force plates, and an electronic timing system. Exercise led to increase of spatial and decrease of temporal gait parameters, increase of joint range of motion and lower limb muscle powers during the entire gait cycle and increase of the moments in the support phase. In conclusion, exercise had a positive effect on this patient’s gait pattern and improved her functionality.
Effect of Exercise on Gait Kinematics and Kinetics in Patients with Chronic Ischaemic Stroke  [PDF]
Styliani Fotiadou, Ioannis Kouroumichakis, Thomas Besios, Nikolaos Papanas, Erasmia Giannakou, Vassilios Gourgoulis, Nikolaos Aggeloussis
Open Journal of Therapy and Rehabilitation (OJTR) , 2019, DOI: 10.4236/ojtr.2019.74010
Abstract: Introduction :?In 2014, American Heart Association and American Stroke Association (AHA/ASA) issued exercise guidelines for stroke patients. Aim of the Study: To study the effects of an exercise programme based on AHA/ ASA guidelines, on gait kinematics and kinetics in patients with chronic ischemic stroke. Materials and Methods: Twelve stroke patients, 67.33 ± 9.14 years old, followed an 8-week exercise programme, with 3 hourly sessions per week, consisting of strength, endurance and flexibility training, as well as neuromuscular activities. Patients’ gait kinematics and kinetics were evaluated before and after the intervention using a 3-dimensional gait analysis system. Results: In most cases, patients in the intervention group showed significant increase or no change in gait kinematics, significant increase in joint moments at the anterior-posterior plane during support phase, and non-signi- ficant change in the frontal and transverse planes kinetics. Conclusions: Exercise prevented further deterioration and/or led to improved walking pattern.
Long-term respiratory follow-up of H1N1 infection
Paul Zarogoulidis, George Kouliatsis, Nikolaos Papanas, Dionysis Spyratos, Theodoros C Constantinidis, Ioannis Kouroumichakis, Paschalis Steiropoulos, Maria Mabroudi, Dimitris Matthaios, Theodora Kerenidi, Nikolaos Courcoutsakis, Konstantinos Zarogoulidis, Efstratios Maltezos
Virology Journal , 2011, DOI: 10.1186/1743-422x-8-319
Abstract: Real-time reverse-transcriptase-polymerase-chain-reaction (RT-PCR) testing was used to confirm the diagnosis. All patients were treated with oseltamivir from the first day of hospitalization. Upon admission 12/44 had local patchy shadowing in their chest x-ray and additionally antibiotic regimen was added to these patients as pneumonia was suspected based on clinical evidence. In total 44 patients were hospitalized 15/44 had asthma, 6/44 COPD, 5/44 leukemia. Lung function was evaluated with forced vital capacity, forced expiratory volume in 1 sec and diffused carbon monoxide upon discharge and every 3 months, until 6 months of observation was completed after discharge. The purpose of this retrospective cohort study was to evaluate whether influenza A (H1N1) had an impact on the respiratory capacity of the infected patients.An improvement of pulmonary function tests was observed between the first two measurements, implicating an inflammatory pathogenesis of influenza A (H1N1) to the respiratory tract. This inflammation was not associated with the severity or clinical outcome of the patients. All patients had a mild clinical course and their respiratory capacity was stable between the second and third measurement, suggesting that the duration of respiratory inflammation was two months. Early treatment with antiviral agents and vaccination represent the mainstay of management.The first human infections with the new influenza A (H1N1) virus were confirmed in April 2009 in America, but the infection had been rapidly spreading around the world and in June 2009 World Health Organization (WHO) declared a pandemic [1-5]. WHO had advised countries in the northern hemisphere to prepare for a second wave of pandemic spread [6]. To date, almost all countries in the world have confirmed a second wave of H1N1 virus [7,8]. For this reason a working group of WHO member states agreed on a pandemic influenza preparedness framework [9]. The reason for creating this framework began with
Risk Management in On-Line Banking  [PDF]
Ioannis V. Koskosas
Intelligent Information Management (IIM) , 2011, DOI: 10.4236/iim.2011.34013
Abstract: In the context of goal setting, the more difficult the goal, given feedback on performance, the more focused is individuals’ attention and persistence to accomplish the goal and in turn, their performance is also improved. Similarly, when the goal is multi-complex and performance time constraint, the deployment of specific strategies maybe the best approach developed. In effect of the above, this investigation takes a socio-psychological and organizational perspective in setting information systems (IS) security goals. In doing so, three important issues of goal setting are identified, these are: trust, culture and risk communication. Since system security breaches are still on the rise, the performance of managing such online risks is not the one expected. The framework suggested in this paper aims to contribute to socio-psychological and organizational values by enhancing the performance of the IS risk management process with a focus on security risks.
Study the Critical Role of Admixtures in Cement Production: The Optimum State of Cassiterite (SnO2) Addition as a Natural Mineralizer-Oxide Influencing the Cement Properties  [PDF]
Ioannis Baziotis, Andreas Chandrinos
Advances in Chemical Engineering and Science (ACES) , 2011, DOI: 10.4236/aces.2011.14031
Abstract: In this work we evaluate the role of a natural mineralizer-oxide like cassiterite (SnO2) on the cement properties. In particular, we study the effect of different quantities of SnO2 with 0.5, 1.0, 1.5 and 2.0 wt% on burnability of industrial raw mix by free lime evaluation. We obtain four datasets, with successive increase of temperature at 1250℃, 1350℃, 1400℃ and 1450℃. We study the produced cassiterite-added clinker with X-ray diffraction (XRD), thermal analysis (DTA) and scanning electron microscopy (SEM). Though, we characterize the new phases formed and whether, adding excess SnO2 is promote forms of C3S, C2S influencing the final quality of cement.
Experimental Testing of Composite Panels Reinforced with Cotton Fibers  [PDF]
Ioannis G. Raftoyiannis
Open Journal of Composite Materials (OJCM) , 2012, DOI: 10.4236/ojcm.2012.22005
Abstract: A research project has been carried out at the National Technical University of Athens, Greece, to develop composite panels reinforced with cotton fibers. The primary aim of the project is to examine the mechanical properties of such panels for use in secondary structural members such as wall or door systems. The use of natural fibers such as cotton, flax or sisal fibers has the primary advantage of being eco-friendly, low cost and low weight compared to glass fibers on the expense of lower structural properties. This paper presents results from experimental work on composite plates made from polyester resin reinforced with cotton fibers, with special attention given to the effect of the fiber type on the structural properties of the plates. The results from this study showed that the structural performance of cotton fiber composites is satisfactory for structural parts with low requirements, such as wall panels or doors. The present results for cotton fiber composites are also compared to testing results from previous studies on composites with flax/sisal fibers.
Feature Extraction for Audio Classification of Gunshots Using the Hartley Transform  [PDF]
Ioannis Paraskevas, Maria Rangoussi
Open Journal of Acoustics (OJA) , 2012, DOI: 10.4236/oja.2012.23015
Abstract: In audio classification applications, features extracted from the frequency domain representation of signals are typically focused on the magnitude spectral content, while the phase spectral content is ignored. The conventional Fourier Phase Spectrum is a highly discontinuous function; thus, it is not appropriate for feature extraction for classification applications, where function continuity is required. In this work, the sources of phase spectral discontinuities are detected, categorized and compensated, resulting in a phase spectrum with significantly reduced discontinuities. The Hartley Phase Spectrum, introduced as an alternative to the conventional Fourier Phase Spectrum, encapsulates the phase content of the signal more efficiently compared with its Fourier counterpart because, among its other properties, it does not suffer from the phase ‘wrapping ambiguities’ introduced due to the inverse tangent function employed in the Fourier Phase Spectrum computation. In the proposed feature extraction method, statistical features extracted from the Hartley Phase Spectrum are combined with statistical features extracted from the magnitude related spectrum of the signals. The experimental results show that the classification score is higher in case the magnitude and the phase related features are combined, as compared with the case where only magnitude features are used.
Erythropoiesis Stimulating Agents (ESAs) in the Treatment of Cardio-Renal Syndrome Anaemia  [PDF]
Ioannis Koulouridis, Efstathios Koulouridis
Open Journal of Nephrology (OJNeph) , 2012, DOI: 10.4236/ojneph.2012.23004
Abstract: Coexistence of chronic kidney disease (CKD) and chronic heart failure (CHF) define a recently recognized clinical entity known as cardio-renal syndrome. Sufficient evidence suggests that the two pathological conditions share common pathogenic etiology which is not yet fully defined. Superimposed anaemia is a common finding among patients suffering from cardio-renal syndrome. The combination of CKD, CHF and anaemia increase the probability of death by 6 times compared to normal individuals. Early attempts to restore anaemia either by iron supplementation, erythropoiesis stimulating agents (ESAs) or combination of the two have reported to improve quality of life, morbidity and mortality especially among patients treated by cardiologists. Recent publications of well controlled epidemiological studies failed to prove convincing beneficial effect of the above mentioned therapy moreover skepticism has raised concerning the safety of restoring anaemia among patients with cardio-renal syndrome as well as used medications. There are still unresolved problems concerning the definition of anaemia, by means of hemoglobin level among these patients, the target hemoglobin level and the therapeutic regimen of ESAs administration and iron supplementation. We need much more evidence in order to define an effective and safe treatment strategy correcting anaemia among patients with cardio-renal syndrome.
Third-Order Corrections and Mass-Shedding Limit of Rotating Neutron Stars Computed By a Complex-Plane Strategy  [PDF]
Ioannis Sfaelos, Vassilis Geroyannis
International Journal of Astronomy and Astrophysics (IJAA) , 2012, DOI: 10.4236/ijaa.2012.24027
Abstract: We implement the so-called “complex-plane strategy” for computing general-relativistic polytropic models of uniformly rotating neutron stars. This method manages the problem by performing all numerical integrations, required within the framework of Hartle’s perturbation method, in the complex plane. We give emphasis on computing corrections up to third order in the angular velocity, and the mass-shedding limit. We also compute the angular momentum, moment of inertia, rotational kinetic energy, and gravitational potential energy of the models considered.
Genetic Implications in COPD. The Current Knowledge  [PDF]
Ioannis Sotiriou, Demosthenes Makris
Open Journal of Respiratory Diseases (OJRD) , 2013, DOI: 10.4236/ojrd.2013.32009
Abstract: Chronic Obstructive Pulmonary Disease (COPD) is a multifactorial disease in the pathogenesis of which contributes a variety of causative factors including genetic and environmental ones. They may also be interactions of genetic susceptibilities and environmental influences. Towards to that in the pathogenesis of the disease except smoking, it seems to have a great impact the genetic predisposition of the individuals suffering from that serious progressive disease. Regarding to these observations and findings very interesting studies have been conducted in order to elucidate the implications of different genes, and their polymorphisms in disease aetiology. This is a review which elucidates the impact of genetic susceptibility in COPD.
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