Damage assessment in agricultural crops with the use of remote sensing in order to distribute compensation from EL.GA

Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Περιβάλλον και Ανάπτυξη” 2η Κατεύθυνση Σπουδών "Περιβάλλον και Ανάπτυξη των Ορεινών Περιοχών

Πειραματική διερεύνηση των μηχανισμών εκπομπής Ακουστικών και Η/Μ σημάτων από κρυσταλλικά υλικά σε συνθήκες ομοαξονικής συμπίεσης μέχρι τη θραύση

Στην παρούσα Διδακτορική διατριβή προτάθηκε μηχανισμός παραγωγής των Ακουστικών και Ηλεκτρομαγνητικών σημάτων που παράγονται κατά την ομοαξονική καταπόνηση κρυσταλλικών υλικών και μελετήθηκε η δυναμική εξέλιξη του φαινομένου της θραύσης.In this thesis we proposed a generating mechanism of acoustic and electromagnetic signals generated during the uniaxial compression crystalline materials and studied the dynamic evolution of the phenomenon of fracturing

Experimental evidence of the compatibility of the cumulative electromagnetic energy release data, with the hierarchical models for the catastrophic fracturing process

In this paper, we performed experiments of uniaxial compression of granite samples and recorded time series of electromagnetic pulses during the evolution of the catastrophic fracturing process. The cumulative energy release of the electromagnetic emission (EME) up to the critical point at the moment of rupture was then calculated. It was shown, that the validity of the proposed hierarchy models for the catastrophic fracturing process of composite materials, in analogy to critical phenomena, can be experimentally established not only via acoustic emission data, but via electromagnetic emission data as well. The above conclusion could be a useful tool for the improvement of the earthquake prediction method, based on precursory electromagnetic signals

Cognitive Impairment in Heart Failure

Cognitive impairment (CI) is increasingly recognized as a common adverse consequence of heart failure (HF). Although the exact mechanisms remain unclear, microembolism, chronic or intermittent cerebral hypoperfusion, and/or impaired cerebral vessel reactivity that lead to cerebral hypoxia and ischemic brain damage seem to underlie the development of CI in HF. Cognitive decline in HF is characterized by deficits in one or more cognition domains, including attention, memory, executive function, and psychomotor speed. These deficits may affect patients' decision-making capacity and interfere with their ability to comply with treatment requirements, recognize and self-manage disease worsening symptoms. CI may have fluctuations in severity over time, improve with effective HF treatment or progress to dementia. CI is independently associated with disability, mortality, and decreased quality of life of HF patients. It is essential therefore for health professionals in their routine evaluations of HF patients to become familiar with assessment of cognitive performance using standardized screening instruments. Future studies should focus on elucidating the mechanisms that underlie CI in HF and establishing preventive strategies and treatment approaches

Αυτοπεποίθηση και αγωνιστικό άγχος σε σχέση με την προσέγγιση επιτυχίας στο καράτε

Σκοπός της παρούσας πτυχιακής εργασίας είναι η διερεύνηση των επιπέδων αυτοπεποίθησης, αγωνιστικού άγχους και προσέγγισης της επιτυχίας αθλητών του Karate. Για τον σκοπό αυτό πραγματοποιήθηκε έρευνα, το ερευνητικό δείγμα της οποίας απαρτίζεται από 54 αθλητές του Karate, που κλήθηκαν να συμπληρώσουν ερωτηματολόγια για τη μέτρηση της αυτοπεποίθησης, της προσέγγισης της επιτυχίας και των επιπέδων του αγωνιστικού άγχους τους. Το ερευνητικό δείγμα συγκεντρώθηκε από ελληνικούς συλλόγους Karate πριν την έναρξη των πανελληνίων πρωταθλημάτων, ενώ τα ερωτηματολόγια διανεμήθηκαν δια ζώσης. Οι στατιστικές αναλύσεις έγιναν μέσω του SPSS και στο πλαίσιο αυτών χρησιμοποιήθηκαν δείκτες της περιγραφικής στατιστικής, αλλά και έλεγχοι επαγωγικής στατιστικής για την ανάδειξη των διαφορών, όπως είναι t-Tests καθώς και ο έλεγχος συσχετίσεων Pearson. Τα αποτελέσματα έδειξαν υψηλότερα επίπεδα αγωνιστικού άγχους και αυτοπεποίθησης στους αθλητές που εμφάνισαν θετική στάση απέναντι στην επιτυχία. Επίσης, αποδείχτηκε ότι οι γυναίκες αθλήτριες είχαν μεγαλύτερο άγχος συγκριτικά με τους άνδρες. Τέλος, αποδείχτηκε ότι υπάρχει θετική και στατιστικά σημαντική συσχέτιση μεταξύ του αγωνιστικού άγχους και των επιπέδων αυτοπεποίθησης των αθλητών, αλλά και της στάσης τους απέναντι στην επιτυχία.N

Telemonitoring in Chronic Heart Failure: A Systematic Review

Heart failure (HF) is a growing epidemic with the annual number of hospitalizations constantly increasing over the last decades for HF as a primary or secondary diagnosis. Despite the emergence of novel therapeutic approached that can prolong life and shorten hospital stay, HF patients will be needing rehospitalization and will often have a poor prognosis. Telemonitoring is a novel diagnostic modality that has been suggested to be beneficial for HF patients. Telemonitoring is viewed as a means of recording physiological data, such as body weight, heart rate, arterial blood pressure, and electrocardiogram recordings, by portable devices and transmitting these data remotely (via a telephone line, a mobile phone or a computer) to a server where they can be stored, reviewed and analyzed by the research team. In this systematic review of all randomized clinical trials evaluating telemonitoring in chronic HF, we aim to assess whether telemonitoring provides any substantial benefit in this patient population

Depression in Patients with Cardiovascular Disease

It has been widely suggested that depression negatively affects patients with cardiovascular disease. There are several pathophysiological mechanisms as well as behavioral processes linking depression and cardiac events. Improvements in nursing and medical care have prolonged survival of this patient population; however, this beneficial outcome has led to increased prevalence of depression. Since mortality rates in chronic heart failure patients remain extremely high, it might be as equally important to screen for depression and there are several valid and reliable screening tools that healthcare personnel could easily employ to identify patients at greater risk. Consultation should be provided by a multidisciplinary team, consisting of cardiologists, psychiatrists, and hospital or community nurses so as to carefully plan, execute, and evaluate medical intervention and implement lifestyle changes. We aim to systematically review the existing knowledge regarding current definitions, prognostic implications, pathophysiological mechanisms, and current and future treatment options in patients with depression and cardiovascular disease, specifically those with heart failure