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Range Expansion of Metcalfa pruinosa (Homoptera: Fulgoroidea) in Southeastern Europe
Cristina Preda,Marius Skolka
Ecologia Balkanica , 2011,
Abstract: The citrus flatid planthopper Metcalfa pruinosa, a Nearctic species of Fulgoroidea: Flatidae, was accidentally introduced in Europe, first in Italy in the late 1970’s. In a few decades, Metcalfa pruinosa has spread over most of Europe, finally reaching the Black Sea coast in 2009. Hundreds of individuals of different life stages were observed for the first time in the southeastern part of Romania throughout the summer of 2009 on several host plants: Hibiscus syriacus, Ligustrum vulgare, Robinia pseudoacacia, Evonymus japonicus, Spirea x vanhouttei, Aesculus hippocastanum, Philadelphus coronarius, Ficus carica, Vitis vinifera, Fraxinus pennsylvanica. The number of individuals observed and the area covered increased dramatically in 2010 as well as the number of host plants (110 species in 49 families), suggesting the planthopper is in the expansion phase of the invasion process.
Testing for aerobic heterotrophic bacteria allows no prediction of contamination with potentially pathogenic bacteria in the output water of dental chair units
Margit Bristela,Astrid Skolka,Martina Schmid-Schwap,Eva Piehslinger
GMS Krankenhaushygiene Interdisziplin?r , 2012,
Abstract: Background: Currently, to our knowledge, quality of output water of dental chair units is not covered by specific regulations in the European Union, and national recommendations are heterogeneous. In Germany, water used in dental chair units must follow drinking water quality. In the United States of America, testing for aerobic heterotrophic bacteria is recommended. The present study was performed to evaluate whether the counts of aerobic heterotrophic bacteria correlate with the presence of potentially pathogenic bacteria such as Legionella spp. or Pseudomonas aeruginosa. Methods: 71 samples were collected from 26 dental chair units with integrated disinfection device and 31 samples from 15 outlets of the water distribution pipework within the department were examined. Samples were tested for aerobic heterotrophic bacteria at 35°C and 22°C using different culture media and for Legionella spp. and for Pseudomonas aeruginosa. Additionally, strains of Legionella pneumophila serogroup 1 were typed with monoclonal antibodies and representative samples of Legionella pneumophila serogroup 1 were typed by sequence based typing. Results: Our results showed a correlation between different agars for aerobic heterotrophic bacteria but no correlation for the count of aerobic heterotrophic bacteria and the presence of Legionella spp. or Pseudomonas aeruginosa. Conclusion: Testing for aerobic heterotrophic bacteria in output water or water distribution pipework within the departments alone is without any value for predicting whether the water is contaminated with potentially pathogenic bacteria like Legionella spp. or Pseudomonas aeruginosa.
Exploring the Nature of Information Systems Development Methodology: A Synthesized View Based on a Literature Review  [PDF]
Daniela Mihailescu, Marius Mihailescu
Journal of Service Science and Management (JSSM) , 2010, DOI: 10.4236/jssm.2010.32033
Abstract: New Information Systems Development Methodologies (ISDMs) are suggested in the belief that their deployment would be beneficial to consultants in their work. A large number of ISDMs already exist but their value has been questioned and at the same time new methodologies continue to be introduced in an attempt to support and improve the practice of information systems development work. What is not always clear from current studies is that ISDM is a multi-perspective and cross-discipline phenomenon. Although a large amount of knowledge of ISDM is available, different disciplinary interests have resulted in fragmented assessments of it. This paper intends to identify theoretical perspectives applied in the conceptualization of ISDM. A review of the literature on ISDM was conducted and four different theoretical perspectives were identified: 1) system, 2) structure, 3) innovation, and 4) knowledge. While each perspective provides various overarching depictions of ISDM, the synthesized view of ISDM provided in this study reveals the complexities and ambiguities of a multifaceted phenomenon such as ISDM. Suggestions for an alternative conceptualization of ISDM are provided in an attempt to facilitate the investigation of ISDM.
Quantum Tic-Tac-Toe: A Genuine Probabilistic Approach  [PDF]
Marius Nagy, Naya Nagy
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.331243
Abstract: We propose a quantum version of Tic-Tac-Toe which accurately reflects the inherent probabilistic nature of the measurement principle in quantum mechanics. We then formulate a quantum strategy which allows a quantum player to consistently win over a classical player, with a certain probability. This result can be seen as another proof of the superior computational power of a quantum system with respect to a classical one. Our investigation also reveals that the non-determinism and complexity introduced by the principles of quantum mechanics into even the most simple games make brute-force strategies considerably more difficult to implement. Consequently, games in which machines have gained the upper hand over humans may be made fair again by upgrading them to a quantum level.
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.

Local exact controllability of the diffusion equation in one dimension
Marius Beceanu
Abstract and Applied Analysis , 2003, DOI: 10.1155/s1085337503303033
Abstract: This paper establishes the local exact null controllability of the diffusion equation in one dimension using distributed controls in the case of the Dirichlet boundary value problem. Most of the techniques used in the course of the proof are borrowed from Barbu (2002).
Dani l 2 as satire
Marius Nel
HTS Theological Studies/Teologiese Studies , 2012,
Abstract: Daniel 2 as satire. Readers use intuitive and acquired knowledge about genres in interpreting what they read and hear, underlining the importance of establishing the genre of a specific piece of literature. The genre of the tales in the Book of Daniel (1–6) has been researched over a long period, without leading to a consensus. In this article it is suggested that the genre of the tales in Daniel may be described in terms of satire, used as a means of resistance to foreign political oppression. Especially humor and irony are utilised in the satire to describe Jewish perception of the oppression and oppressor, and to make suggestions for acting in the crisis situation of Antiochus’ suppression of the Jewish religion. This is demonstrated in terms of the tale in Daniel 2, and specifically in the depiction of the indirect characters in the tale – the God of the Jews in Daniel 2, in contrast to the powerlessness of the gods of the mighty heathen king. In this way the true nature of Jewish oppression is pictured in a humorous way when the Babylonian gods are at the mercy of the Jewish God. HTS Teologiese Studies/Theological Studies, 68(1), 2012
“Note on sex for the aged widower”: On André Brink's The Rights of Desire
Marius Crous
Tydskrif vir letterkunde , 2006,
Abstract: This article examines the representation of masculinity in André Brink's novel, The Rights of Desire. Following a remark in Roger Boylan's review of the novel in the Boston Review; this analysis concentrates on Brink's depiction of Afrikaner masculinity and the idea that the character Ruben Olivier represents Brink's conception of the contemporary Afrikaner male, in particular the older Afrikaner male. This is an attempt at determining the validity of Robert Morrell's thesis on masculinity, namely that it is about “men making and remaking masculinity, about challenging hegemonic masculinity and reconstituting it.” The question is whether Brink's portrayal of Afrikaner masculinity confronts the hegemonic and patriarchal power structures associated with Afrikaner men, and whether it provides the reader with a new perspective on Afrikaner masculinity. This article investigates Brink's representation of firstly, the ways Afrikaner men relate to other men, and secondly, the depiction of Afrikaner men in relation to their social class and to women.
PRINCIPLE OF PROPORTIONALITY, CRITERION OF LEGITIMACY IN THE PUBLIC LAW
Marius ANDREESCU
Lex et Scientia , 2011,
Abstract: A problem of essence of the state is the one to delimit the discretionary power, respectively the power abuse in the activity of the state’s institutions. The legal behavior of the state’s institutions consists in their right to appreciate them and the power excess generates the violation of a subjective right or of the right that is of legitimate interest to the citizen. The application and nonobservance of the principle of lawfulness in the activities of the state is a complex problem because the exercise of the state’s functions assumes the discretionary powers with which the states authorities are invested, or otherwise said the ‘right of appreciation” of the authorities regarding the moment of adopting the contents of the measures proposed. The discretionary power cannot be opposed to the principle of lawfulness, as a dimension of the state de jure. In this study we propose to analyze the concept of discretionary power, respectively the power excess, having as a guidance the legislation, jurisprudence and doctrine in the matter. At the same time we would like to identify the most important criterions that will allow the user, regardless that he is or not an administrator, a public clerk or a judge, to delimit the legal behavior of the state’s institutions from the power excess. Within this context, we appreciate that the principle of proportionality represents such a criterion. The proportionality is a legal principle of the law, but at the same time it is a principle of the constitutional law and of other law branches. It expresses clearly the idea of balance, reasonability but also of adjusting the measures ordered by the state’s authorities to the situation in fact, respectively to the purpose for which they have been conceived. In our study we choose theoretical and jurisprudence arguments according to which the principle of proportionality can procedurally be determined and used to delimit the discretionary power and power abuse.
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