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On a Discrete Version of the Mohr-Mascheroni Theorem  [PDF]
Marius Munteanu, Laura Munteanu
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.411A4002
Abstract:

We introduce a new geometric tool called n-compass and show that the famous theorem of Mascheroni and Mohr remains valid if the traditional compass is replaced by the newly introduced tool.

Rational Equiangular Polygons  [PDF]
Marius Munteanu, Laura Munteanu
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.410197
Abstract:

The main purpose of this note is to investigate equiangular polygons with rational edges. When the number of edges is the power of a prime, we determine simple, necessary and sufficient conditions for the existence of such polygons. As special cases of our investigations, we settle two conjectures involving arithmetic polygons.

INCAS TRISONIC WIND TUNNEL
Florin MUNTEANU
INCAS Bulletin , 2009, DOI: 10.13111/2066-8201.2009.1.1.2
Abstract: The 1.2 m x 1.2 m Trisonic Blowdown Wind Tunnel is the largest of the experimental facilities at the National Institute for Aerospace Research - I.N.C.A.S. "Elie Carafoli", Bucharest, Romania. The tunnel has been designed by the Canadian company DSMA (now AIOLOS) and since its commissioning in 1978 has performed high speed aerodynamic tests for more than 120 projects of aircraft, missiles and other objects among which the twin jet fighter IAR-93, the jet trainer IAR-99, the MIG-21 Lancer, the Polish jet fighter YRYDA and others. In the last years the wind tunnel has been used mostly for experimental research in European projects such as UFAST. The high flow quality parameters and the wide range of testing capabilities ensure the competitivity of the tunnel at an international level.
Web User Profile Using XUL and Information Retrieval Techniques
Dan MUNTEANU
Annals of Dunarea de Jos , 2008,
Abstract: This paper presents the importance of user profile in information retrieval, information filtering and recommender systems using explicit and implicit feedback. A Firefox extension (based on XUL) used for gathering data needed to infer a web user profile and an example file with collected data are presented. Also an algorithm for creating and updating the user profile and keeping track of a fixed number k of subjects of interest is presented.
Recommendation Process in SR1 Web Document Recommender System
Dan MUNTEANU
Annals of Dunarea de Jos , 2008,
Abstract: This paper presents a recommender system for web documents (given as bookmarks). The system uses for classification a combination of content, event and collaborative filters and for recommendation a modified Pearson-r algorithm. The algorithm for recommendation is using not only the correlation between users but also the similarity between classes. Some experimental results that support this approach are also presented.
THE CONNECTION BETWEEN MANAGEMENT AND TECHNOLOGY AND THE TECHNOLOGICAL MANAGEMENT
RARE? MUNTEANU
Annals of the University of Petrosani : Economics , 2010,
Abstract: In a new approach, the technology is taken into consideration as a resource of the business, in addition to the four traditional resources: material resources, financial resources, human resources and informational resources. This makes important for the managers to have solid technological knowledge, in addition to the economics. The research regarding the technological management (or the management of technology - MOT) is lead by IAMOT (International Association in Management of Technology). There are a lot of connections between the technology on one side and the finances, the human resources, the marketing, the operational management on the other side. In our era the technology is more and more advanced and all the activities are strongly connected to it.
A quick survey of text categorization algorithms
Dan MUNTEANU
Annals of Dunarea de Jos , 2007,
Abstract: This paper contains an overview of basic formulations and approaches to text classification. This paper surveys the algorithms used in text categorization: handcrafted rules, decision trees, decision rules, on-line learning, linear classifier, Rocchio’s algorithm, k Nearest Neighbor (kNN), Support Vector Machines (SVM).
Vector space model for document representation in information retrieval
Dan MUNTEANU
Annals of Dunarea de Jos , 2007,
Abstract: This paper presents the basics of information retrieval: the vector space model for document representation with Boolean and term weighted models, ranking methods based on the cosine factor and evaluation measures: recall, precision and combined measure.
Major Approaches to Medical Diagnosis and their Drawbacks
Sabina MUNTEANU
Annals of Dunarea de Jos , 2009,
Abstract: The ability to reason within a dynamical environment is of a crucial importance in Artificial Intelligence. Medical diagnosis is a dynamic and very complex field which needs special attention Our quest is for a system for medical diagnosis, that could model its search space efficiently and dynamically, while confronted with sequential tests. We present below some of the major approaches from literature, with their drawbacks, and conclude that a combinative hybridization of a certain type would be useful to overcome the failures.
Selection of the Diagnostic Hypotheses through Fuzzy Decision in a Medical Diagnosis System
Sabina MUNTEANU
Annals of Dunarea de Jos , 2008,
Abstract: The paper presents an evaluation of the diagnostic hypotheses’ selection step within the medical diagnosis hybrid system DiaMed. Medical diagnoses are described in DiaMed through fuzzy decision functions that are used as discrimination functions for the selection. This type of selection is compared theoretically to a generic fuzzy inference model for medical diagnosis, and is evaluated on a differential diagnosis example, using the C discrimination index of Harrell.
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