An Inconsistency in the Simulation of Bose-Einstein Correlations

We show that the formalism commonly used to implement Bose-Einstein correlations in Monte-Carlo simulations can lead to values of the two-particle correlator significantly smaller than unity, in the case of sources with strong position-momentum correlations. This is more pronounced when the phase space of the emitted particles is strongly reduced by experimental acceptance or kinematic analysis selections. It is inconsistent with general principles according to which the Bose-Einstein correlator is larger than unity. This inconsistency seems to be rooted in the fact that quantum mechanical localization properties are not taken into account properly.Comment: 10 pages, LaTe

Cистема К. Станіславського та «підводна течія»: до проблеми вивчення художньої функціональності підтекстових смислів

У статті досліджуються виявлення, осмислення та втілення імпліцитної інформації відомим актором, режисером і реформатором театру К. Станіславським на матеріалі постановок п’єс А. Чехова, визнаного майстра підтексту. Зокрема, аналізуються особливості постановок п’єс за лінією інтуїції і чуття, втілення внутрішньої дії, акцентування на деталях, що несуть в собі приховані смисли, а також розкриття сутності розуміння терміну «підтекст». (The paper deals with the uncovering, the understanding, and the presentation of the implied information by the well-known actor, theatre director and theatre reformer K. Stanislavsky on the basis of his performances of A. Chekhov’s plays. A. Chekhov is the founder of the new drama, the innovatory artistic and theatrical systems, and the principal characteristic of these systems is subtext. The main idea of his works such as «The Seagull», «Uncle Vanya», «Three Sisters» is underneath the words and actions. And the Stanislavsky system represents the new and innovative method of the actors’ work on the implicit meanings. In particular, the specific of the plays performances according to the line of intuition and feeling is analyzed. The core of this method is in the conveyance of the non-verbal information, impressions, and feelings by actors. And the same time the artistic intuition is the significant feature of the talented actors which provides right ways to bring the audience feeling that the main sense of the play is implied. A major significance has an engagement between internal and external lines of actions, and in this correlation an internal line concentrates the main idea of the play. The author of the paper examines the accentuation on details which have implicative meanings. Visual and audio effects (for example, sounds and details of theatrical costumes) conceal the attached and non-verbal information. The sensibility of Stanislavsky system for the uncovering, the understanding, and the presentation of the subtext on the theatre stage demonstrates methods used in the modern films for the creating of the implicit meanings to intensify the informational content of the screenplay. This theatre experience is very important for the literary analysis of the artistic functionality of the implied meanings.

On the finding of the Indo-Pacific fish Scomberomorus commerson in Rhodes (Greece)

The occurrence of the Indo-Pacific fish Scomberomorus commerson was observed for the first time in the Hellenic waters of the SE Aegean Sea during the spring 2008. The record may represent a first indication of a population expansion of this alien species along the southern coasts of the Aegean Sea

Allochthonous and vagrant ichthyofauna in Hellenic marine and estuarine waters

A review of the non-indigenous ichthyofauna occurring in the Hellenic marine and estuarine waters is presented, including Atlantic origin colonizers, aquaculture introduced and Lessepsian alien species. 34 non-native species have been registered. The majority of allochthonous fish are Lessepsian immigrants, which represent approximately 80% of the ascertained non-native ichthyofauna in Hellenic waters; their establishment, spread, habitat, abundance and interaction with indigenous fish are discussed

First occurrence of Actaeodes tomentosus (H. Milne Edwards, 1834) (Brachyura: Xanthidae: Actaeinae) in the Mediterranean Sea

The presence of the crab Actaeodes tomentosus, native to the Indo-Pacific Ocean and the Red Sea, is documented for the first time in the Mediterranean Sea, on the basis of two specimens collected from Rhodes Island (Aegean Sea), a marine area particularly vulnerable to warm-water alien invasions. Along with the recent report of Xanthias lamarckii in similar conditions and region, the finding of another non-indigenous xanthid opens many questions regarding their occurrence in the area. Apart from the Lessepsian migration, other possible vectors of introduction are therefore examined

Description of the first Lessepsian squid migrant, Sepioteuthis lessoniana (CEPHALOPODA: Loliginidae), in the Aegean Sea (Eastern Mediterranean)

Loliginid squids of the Sepioteuthis lessoniana complex are widely spread in the Indo-Pacific Ocean, where they constitute a commercially important resource for neritic fisheries. Sepioteuthis lessoniana is the only Lessepsian squid migrant till now, recorded for the first time in the Mediterranean in 2002 along the Turkish Levantine coasts. Two maturing males, with mantle lengths 193 mm and 244 mm, have been recently caught near the coasts of Rhodes Island (SE Aegean), extending the species distribution northward, into Hellenic waters. Their identity was confirmed by comparison of the main body, beak characteristics and morphometric measurements with those available in the literature for this species. Suspected expansion of the Lessepsian loliginid into the Aegean Sea, due to the gradual warming of the sea, is discussed

Macrophthalmus graeffei A. Milne Edwards, 1873 (Crustacea: Brachyura: Macrophthalmidae): a new Indo-Pacific guest off Rhodes Island (SE Aegean Sea, Greece)

A new alien crab, the macrophthalmid Macrophthalmus graeffei, is reported from the eastern coastline of Rhodes Island. The species, of Indo-West Pacific origin, is known from muddy sediments up to about 80 m depth. In the Mediterranean, its presence has been observed along Levantine coasts as well as along the Turkish coast of the Aegean Sea.Macrophthalmus graeffei increases to twelve the number of alien brachyurans present in the Hellenic SE Aegean Sea, ten of them having Indo-Pacific origin

Occurrence of the lessepsian species Portunus pelagicus (Crustacea) and Apogon pharaonis (Pisces) in the marine area of Rhodes Island

A large number of Red Sea species are colonizing the eastern Mediterranean Sea via the Suez Canal, mainly following the Anatolian coasts and spreading westwards. Portunus pelagicus is one of the most common Red Sea swimming crabs, first recorded in the Levantine Basin in 1898. Four specimens of P. pelagicus were collected in different marine areas of Rhodes Island from 1991 to 2000, while three specimens of the lessepsian fish Apogon pharaonis, first recorded in the Mediterranean in 1947, were caught during 2002 in the NW coast of Rhodes. The sub-tropical character of the marine area around Rhodes seems to facilitate the propagation of lessepsian species. These migrants have reached the island at different velocity and degree of establishment of their populations. The occurrence of the blue swimmer crab P. pelagicus and of the bullseye cardinal fish A. pharaonis increases the number of the decapod Crustacea and fish species of Red Sea origin observed in Greek waters

A new alien crab for the Mediterranean Sea: Xanthias lamarckii (H. Milne Edwards, 1834) (Crustacea: Decapoda: Brachyura: Xanthidae)

A single specimen of Xanthias lamarckii was collected on March 2013 from the shallow waters of Chtenia, a rocky islet near Rhodes Island, south-eastern Aegean Sea. The occurrence of this Indo-West Pacific species is reported for the first time in the Mediterranean waters and documents the ongoing process of biological invasion of the basin. The vector of introduction of X. lamarckii is unknown so far, waiting for future information on establishment and spread of the species in its new environment

Update of marine alien species in Hellenic waters

The list of marine alien species in Hellenic waters is updated taking into account new findings (published and unpublished data). According to the present work, the number of these species has increased from 90 (known until end 2003) to 128. Most of them are zoobenthic species followed by fish and macroalgae. An interannual analysis revealed an important increase of alien species during the last years. The study of their geographic distribution showed that their majority is present in the southeastern Aegean. More than 55% of them are well established, while about 40% are casual records. Their main pathway of introduction seems to be the Suez Canal followed by shipping, whereas the Straits of Gibraltar, aquaculture and the Straits of Dardanelles appear to play a less important role in their invasion of Hellenic waters. These findings are discussed considering environmental and anthropogenic factors