120 research outputs found
The program of his foreign policy
No full textTitle: Tó πpóypaμμa τῆς ἐξωτεp ῆς αủτoũ πoλιτιĸῆς (The program of his foreign policy) Originally published: Appendix to the newspaper Πατpíς (Motherland), Athens, 1915 Language: GreekThe excerpts used are from the original. About the author Eleftherios Venizelos: [1864, Mournies (the island of Crete) – 1936, Paris]: the most prominent Greek politician of the twentieth century. He was born to a well-off merchant family. He completed his secondary education in Chania (Tur. Hanya) in Crete. His ..
The program of his foreign policy
No full textTitle: Tó πpóypaμμa τῆς ἐξωτεp ῆς αủτoũ πoλιτιĸῆς (The program of his foreign policy) Originally published: Appendix to the newspaper Πατpíς (Motherland), Athens, 1915 Language: GreekThe excerpts used are from the original. About the author Eleftherios Venizelos: [1864, Mournies (the island of Crete) – 1936, Paris]: the most prominent Greek politician of the twentieth century. He was born to a well-off merchant family. He completed his secondary education in Chania (Tur. Hanya) in Crete. His ..
Application of a Modified Generalized Regression Neural Networks Algorithm in Economics and Finance
No full textIn this paper we propose an alternative and modified Generalized Regression Neural Networks Autoregressive model (GRNN-AR) in S&P 500 and FTSE 100 index returns, as also in Gross domestic product growth rate of Italy, USA and UK. We compare the forecasts with Generalized Autoregressive conditional Heteroskedasticity (GARCH) and Autoregressive Integrated Moving Average (ARIMA) models. The results indicate that GRNN outperform significant the conventional econometric models and can be an efficient alternative tool for forecasting. The MATLAB algorithm we propose is provided in appendix for further applications, suggestions, modifications and improvements
Artifacts in spiral CT protocols: The importance of the spatial reconstruction
No full textAim: The initial aim of this prospective study was to record and analyze the streak artifacts and the motion artifacts in spiral CT examinations. The second aim was to evaluate the possibility of elimination and minimization of these artifacts through spatial reconstruction. Further aim was to evaluate the possibility of elimination and minimization of these artifacts through alterations of the examination protocols from the beginning. Ultimate aim was to reduce the patient dose via the avoidance of repetitive scans. Material and method: A spiral CT (Philips 5000 SR) was used, with a scan time of 3 and 1.5 seconds per rotation. 100 thorax and 300 brain CT examinations, wereincluded in the study. They were selected randomly during the program, whenever the images contained artifacts, which could imitate pathology. An experienced Radiologist did the selection of the cases, and an experienced Radiographer applied the spatial resolution. Qualitative analysis of the images was done by two Radiologists. All the images were classified into four categories according to the improvement ofthe image quality. Results: The brain examinations demonstrated the following results: 10,9% of the cases had no improvement, 19,6% of the images were slightly improved, 31,5% of these images improved enough and the rest 38% of the cases had a significantimprovement. The results in the thorax examinations were the following: 27,3% of the cases had no improvement, 22,9% ofthe images were slightly improved, 26,7% of the images improved enough and 23,1% of the cases had a significant improvement. The spatial reconstruction was not effective in the brain examinations when the patient had moved during the whole scan time, and in the thorax examinations whenever streak and motion artifacts co-existed. As well, at thorax examinations the spatial reconstruction eliminates and minimizes the partial volume effect.Conclusions: The spatial reconstruction when applied in brain CT examinations and in thorax CT examinations improves the quality of the image and contributes to the extraction of more accurate conclusions. This process for the correction of the motion artifacts is not only suggested for safety reasons but as well as because it is difficult for an examination to be repeated when the patient is not cooperative. The spatial reconstruction is especially important in thorax examinations, because due to the maximum dose ofthe medium, the examination cannot be repeated in the same day.Σκοπός: Πρώτος σκοπός της προοπτικής μελέτης ήταν η καταγραφή και η ανάλυση των γραμμοειδών τεχνικών σφαλμάτων και των τεχνικών σφαλμάτων κίνησης σε εξετάσεις με Υπολογιστικούς Τομογράφους ελικοειδούς σάρωσης. Δεύτερος σκοπός ήταν ο έλεγχος δυνατότητας εξάλειψης και ελαχιστοποίησης των εν λόγω τεχνικών σφαλμάτων με την τεχνική της τμηματικής ανασύνθεσης. Περαιτέρω σκοπός ήταν ο έλεγχος δυνατότητας εξάλειψης - ελαχιστοποίησης των εν λόγω τεχνικών σφαλμάτων με διαφοροποιήσεις των πρωτοκόλλων εξέτασης εξ αρχής. Απώτερος σκοπός ήταν η μείωση της δόσης ακτινοβολίας στον εξεταζόμενο με την αποφυγή επαναληπτικών σαρώσεων. Υλικό — μέθοδος: Χρησιμοποιήθηκε Υ.Τ. ελικοειδούς σάρωσης (Philips 5000 SR) με χρόνο ακτινοβόλησης 3 και 1,5 δευτερόλεπτα ανά περιστροφή. Στη μελέτη συμπεριλήφθηκαν 100 εξετάσεις θώρακος και 300 εξετάσεις εγκεφάλου. Η επιλογή τους γινόταν τυχαία κατά τη διάρκεια του προγράμματος όταν οι εικόνες εμπεριείχαν τεχνικά σφάλματα τα οποία μπορούσαν να μιμηθούν παθολογία. Η επιλογή των περιστατικών έγινε από έναν συγκεκριμένο έμπειρο ιατρό Ακτινολόγο και η τμηματική ανασύνθεση πραγματοποιήθηκε από έναν επίσης έμπειρο τεχνολόγο Ακτινολόγο. Επίσης έγινε ποιοτική αξιολόγηση από δύο Ιατρούς Ακτινολόγους και κατάταξη των εικόνων σε τέσσερις κατηγορίες ανάλογα με το ποσοστό βελτίωσης των εικόνων. Αποτελέσματα: Στις εξετάσεις εγκεφάλου στο 10,9% των περιπτώσεων δεν υπήρξε βελτίωση, στο 19,6% των περιπτώσεων οι εικόνες βελτιώθηκαν ελάχιστα, στο 31,5% των περιπτώσεων οι εικόνες βελτιώθηκαν αρκετά και στο 38% των περιπτώσεων η βελτίωση είναι σημαντική. Στις εξετάσεις θώρακος στο 27,3% των περιπτώσεων, στις εικόνες δεν παρατηρήθηκε σχεδόν καμία βελτίωση, στο 22,9% των περιπτώσεων οι εικόνες βελτιώθηκαν ελάχιστα, στο 26,7% των περιπτώσεων οι εικόνες βελτιώθηκαν αρκετά και στο 23,1%των περιπτώσεων η βελτίωση ήταν σημαντική. Η τμηματική ανασύνθεση δεν ήταν αποτελεσματική για τις εξετάσεις του εγκεφάλου, κατά τις οποίες ο εξεταζόμενος κινήθηκε σε ολόκληρο τον χρόνο λήψης τομής και για τις εξετάσεις θώρακος όπου τα γραμμικά τεχνικά σφάλματα (streak artifact) υπήρχαν και σφάλματα κίνησης. Επίσης σε εξετάσεις θώρακος η τμηματική ανασύνθεση εξαλείφει ή περιορίζει το φαινόμενο μερικού όγκου. Συμπέρασμα: Η τμηματική ανασύνθεση στις εξετάσεις εγκεφάλου και στις εξετάσεις θώρακος, βελτιώνει την ποιότητα της εικόνας και βοηθάει να εξαχθούν πιο ακριβή συμπεράσματα. Η παραπάνω επεξεργασία για την διόρθωση τεχνικών σφαλμάτων κίνησης προτείνεται όχι μόνο για λόγους ακτινοπροστασίας αλλά και επειδή είναι δύσκολο σε έναν μη συνεργάσιμο εξεταζόμενο να επαναληφθεί η εξέταση. Ιδιαιτέρως σημαντική είναι η επεξεργασία στις εξετάσεις θώρακος, όπου λόγω της μεγάλης δόσης σκιαγραφικού η εξέταση δεν είναι δυνατόν να επαναληφθεί αυθημερόν
Extracting and optimizing low-level bytecode from high-level verified Coq
No full textThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2019Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 51-53).This document is an MEng thesis presenting MCQC, a compiler for extracting verified systems programs to low-level assembly, with no Runtime or Garbage Collection requirements and an emphasis on performance. MCQC targets the Gallina functional language used in the Coq proof assistant. MCQC translates pure and recursive functions into C++17, while compiling monadic effectful functions to imperative C++ system calls. With a series of memory and performance optimizations, MCQC combines verifiability with memory and runtime performance. By handling effectful and pure functions MCQC can generate executable code directly from Gallina and link it with trusted code, reducing the effort of implementing and executing verified systems.by Eleftherios Ioannidis.M. Eng.M.Eng. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Scienc
Ion Dragoumis: Hellenic civilization
No full textTitle: Ελληνικός Πολιτισμός (Hellenic civilization) Originally published: In the review Γράμματα (Letters), Alexandria, 1914. Language: Greek Τhe excerpts used are from Ionos Dragoumi, Έργα (Athina, 1917), pp. 231–235. About the author Ion Dragoumis (known also by his penname Idas) [1878, Athens–1920, Athens]: politician, diplomat, and writer. He was born to a prominent family; his father Stefanos was the head of the last government before Eleftherios Venizelos took over in 1910. His sister w..
Characteristics of the integration process in the food industry of the Republic of Kazakhstan
Get PDFThe article examines the problems of the integration processes in the food industry of Kazakhstan. It analyzes the current situation in the food and processing industries and describes the integration process in the food industry at the level of corporations. We reveal the problems of development in the food industry, including joint ventures, and highlight options to overcome them. The author concludes that creation of modern equipped territories embodied by industrial zones close to raw materials and distribution markets would be a positive step towards the creation of joint enterprises in the food industry.peer-reviewe
Dependency Solving Is Still Hard, but We Are Getting Better at It
No full textDependency solving is a hard (NP-complete) problem in all non-trivial component models due to either mutually incompatible versions of the same packages or explicitly declared package conflicts. As such, software upgrade planning needs to rely on highly specialized dependency solvers, lest falling into pitfalls such as incompleteness - a combination of package versions that satisfy dependency constraints does exist, but the package manager is unable to find it. In this paper we look back at proposals from dependency solving research dating back a few years. Specifically, we review the idea of treating dependency solving as a separate concern in package manager implementations, relying on generic dependency solvers based on tried and tested techniques such as SAT solving, PBO, MILP, etc. By conducting a census of dependency solving capabilities in state-of-the-art package managers we conclude that some proposals are starting to take off (e.g., SAT-based dependency solving) while - with few exceptions - others have not (e.g., outsourcing dependency solving to reusable components). We reflect on why that has been the case and look at novel challenges for dependency solving that have emerged since.Software Engineerin
110 common errors in company valuations
Get PDFThis paper contains a collection and classification of 110 errors seen in company valuations performed by financial analysts, investment banks and financial consultants. The author had access to most of the valuations referred to in this paper in his capacity as a consultant in company acquisitions, sales, mergers, and arbitrage processes. We classify the errors in six main categories: 1) Errors in the discount rate calculation and concerning the riskiness of the company; 2) Errors when calculating or forecasting the expected cash flows; 3) Errors in the calculation of the residual value; 4) Inconsistencies and conceptual errors; 5) Errors when interpreting the valuation; and 6) Organizational errors.peer-reviewe
The impact of foreign economic and energy factors on the formation of US foreign policy
Get PDFThis paper presents the impact of foreign economic and energy factors on formation of the foreign policy strategy of the USA. In the author’s opinion, the contemporary energy policy is one of the main issues of the US foreign policy in the international area, as it is aimed at meeting the increasing demands of the USA for energy resources and maintaining the world-leading status of American economy. As a result, the author comes to conclusion that foreign economic activity and energy factor in the US foreign policy actively help to introduce own TNC into different countries, which, in their turn, solve not only their corporate tasks, but also contribute to the achievement of the US foreign policy goals.peer-reviewe
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