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The current status of research related to the behavior of the ϕ meson in nuclear matter is reviewed. First, recent theoretical works based of QCD sum rules and effective theory approaches are discussed. Next, preliminary results of transport simulations of pA reactions, with the goal of reproducing the dilepton spectra of the KEK E325 experiment are presented.
The first study of ϕ-meson production in p–Pb collisions at forward and backward rapidity, at a nucleon–nucleon centre-of-mass energy √sNN=5.02 TeV, has been performed with the ALICE apparatus at the LHC. The ϕ-mesons have been identified in the dimuon decay channel in the transverse momentum (pT) range 1<pT<7 GeV/c, both in the p-going (2.03<y<3.53) and the Pb-going (−4.46<y<−2.96) directions — where y stands for the rapidity in the nucleon–nucleon centre-of-mass — the integrated luminosity amounting to 5.01±0.19 nb−1 and 5.81±0.20 nb−1, respectively, for the two data samples. Differential cross sections as a function of transverse momentum and rapidity are presented. The forward–backward ratio for ϕ-meson production is measured for 2.96<|y|<3.53, resulting in a ratio ∼0.5 with no significant pT dependence within the uncertainties. The pT dependence of the ϕ nuclear modification factor RpPb exhibits an enhancement up to a factor 1.6 at pT=3–4 GeV/c in the Pb-going direction. The pT dependence of the ϕ-meson cross section in pp collisions at √s=2.76 TeV, which is used to determine a reference for the p–Pb results, is also presented here for 1<pT<5 GeV/c and 2.5<y<4, for a 78±3 nb−1 integrated luminosity sample.
ϕ-meson production in In–In collisions at Elab=158A GeV: Evidence for relics of a thermal phase
(2010)
Yields and transverse mass distributions of the ϕ-mesons reconstructed in the ϕ→μ+μ− channel in In+In collisions at Elab=158A GeV are calculated within an integrated Boltzmann+hydrodynamics hybrid approach based on the Ultrarelativistic Quantum Molecular Dynamics (UrQMD) transport model with an intermediate hydrodynamic stage. The analysis is performed for various centralities and a comparison with the corresponding NA60 data in the muon channel is presented. We find that the hybrid model, that embeds an intermediate locally equilibrated phase subsequently mapped into the transport dynamics according to thermal phase-space distributions, gives a good description of the experimental data, both in yield and slope. On the contrary, the pure transport model calculations tend to fail in catching the general properties of the ϕ meson production: not only the yield, but also the slope of the mT spectra, compare poorly with the experimental observations at top SPS energies.
Retournement or turning of the aedeagus about its longitudinal axis through about 180o during development is known in Chrysomeloidea (Coleoptera). This change in the orientation of the organ may be observed during the postembryonic development. This change produces certain morphological effects. By observing these morphological features in the imago the retournement may be inferred. Such morphological features in Curculionidae (Coleoptera) are here recorded. From this it has been inferred not only that retournement of the aedeagus is included in the ontogeny of curculionids, but also that the change of orientation of the organ occurs by the same mechanism as in Chrysomeloidea. These inferences attest the notion of a close phyletic relationship between the superfamilies Curculionoidea and Chrysomeloidea.
In this contribution I shall be interested, among other things, in finding a place for the European phenomenon of the ›Speculum humanae salvationis‹ within German literary history, which will inescapably involve revisiting the unfashionable discussion of date and origins. I also intend to ask about the place of this text in the ‘didactic’ literature of the Middle Ages. Is a religious text structured according to sacred history didactic? Much didactic poetry is in the vernacular: What does it mean that the ›Speculum‹ was composed in Latin? And what place should be accorded to its vernacular reception? The ›Speculum‹ is inscribed within a set of oppositions that would appear to be recurrent in the didactic literature of the later Middle Ages: Latin and vernacular, verse and prose, words and pictures, religious and profane, moral
teaching and devotion, clerical and lay. In view of its exceptionally broad transmission in the German lands, both in Latin and in vernacular reworkings, is it possible to describe this text so that it takes a place within a larger picture? In some respects it may stand at a threshold in the history of European didacticism.
Research on collective resilience processes still lacks a detailed understanding of psychological mechanisms at work when groups cope with adverse conditions, i.e., long-term processes, and how such mechanisms affect physical and mental well-being. As collective resilience will play a crucial part in facing looming climate change-related events such as floods, it is important to investigate these processes further. To this end, this study takes a novel holistic approach by combining resilience research, social psychology, and an archeological perspective to investigate the role of social identity as a collective resilience factor in the past and present. We hypothesize that social identification buffers against the negative effects of environmental threats in participants, which increases somatic symptoms related to stress, in a North Sea region historically prone to floods. A cross-sectional study (N = 182) was conducted to analyze the moderating effects of social identification on the relations between perceived threat of North Sea floods and both well-being and life satisfaction. The results support our hypothesis that social identification attenuates the relationship between threat perception and well-being, such that the relation is weaker for more strongly identified individuals. Contrary to our expectations, we did not find this buffering effect to be present for life satisfaction. Future resilience studies should further explore social identity as a resilience factor and how it operates in reducing environmental stress put on individuals and groups. Further, to help communities living in flood-prone areas better cope with future environmental stress, we recommend implementing interventions strengthening their social identities and hence collective resilience.
As Bakhtin noted, chronotopes arise from the density and fusion of temporal and spatial indicators. In prose narrative, the density of temporal and spatial indicators arises as a natural consequence of setting scenes and explaining action, and those indicators are fused by the centripetal forces of plot, character and so on that encourage us to read the various elements of the text as aspects of a coherent story and world. In non-narrative poetry, however, there is no story to drive the setting of scene or generation of character; there may not even be scene or character. As a result, temporal and spatial indicators can be quite sparse, and there may be little centripetal force to encourage their fusion. In a textual environment bereft of character, plot, scene, in which even the centripetal forces of syntax are frayed by linebreaks and other poetic devices, how can chronotopes form and function? [...] In the centripetal environment afforded by most prose narratives, the stable chronotopes and the relationships among them define consciousness, world and values. In the centrifugal environment of non-narrative poetry, chronotopes flicker and flow in a series of hints, glimpses, dissolves, defining consciousness, world and values via evanescence rather than stability. However, as I hope to show below, the evanescence of chronotopes in non-narrative poetry can be as central to the vitality and meaning of those texts as the stability of chronotopes is to the vitality and meaning of prose narratives.
“Shades” of Postmortem Personal Identity: ψυχή καὶ εἴδωλον in the Dream Passage (Il. 23.103-104)
(2013)
In a recent contribution entitled, “Homer’s Challenge to Philosophical Psychology,” Fred Miller proposes an “aporetic approach” to the Homeric poems. That is to say, a close reading of the epics reveals “serious aporiai,” at least insofar as philosophical consistency is concerned. Homeric readers, ancient and modern alike, have found irreconcilably-different answers to our perennial questions about humanity and divinity, fate and free will. To his credit, Miller rightly relieves Homer of an undue burden – viz., that of addressing the philosophical problems of later generations. “The analysis of concepts and the resolution of aporiai”: these are, as Miller notes, definitively not the priorities of an epic bard. Instead, such poets, working freely within the parameters of their oral traditions, understandably use language in ways not strictly-philosophical. Ultimately, Miller wants to argue that the ambiguities of Homer’s poetic language hastened Greece’s philosophical awakening...
A global synonymical checklist of the species and higher taxa of the insect order Megaloptera is provided. The checklist includes both extant and extinct taxa, and recognizes 2 families, 4 subfamilies, 48 genera, 425 species, and 6 subspecies. Both families (Corydalidae and Sialidae), and three of the four subfamilies (Corydalinae, Chauliodinae, and Sialinae) are known from both extant and extinct species; the Sharasialinae (Sialidae) is entirely extinct. Country-level geographic distribution data are provided for all species and subspecies. Synoptic type data are provided for taxa in the family and genus groups. Summary data are given for the numbers of megalopteran species currently known to occur in each of the major biogeographical regions of the world, and for the world fauna. Increase of knowledge about the diversity of the world Megaloptera fauna is summarized in counts of valid species described per decade and in a global taxonomic description curve. An updated set of keys to the world families, subfamilies, and genera of the Megaloptera is also provided.
The only lists of Hydrophiloidae (Coleoptera: Hydrophilidae, Helophoridae, Hydrochidae, and Hydraenidae) from the mid-Atlantic region are Ulke (1902) who reported 46 species from the District of Columbia and Matta (1974) who presented keys and short descriptions for the 49 aquatic species of Hydrophilidae of Virginia. The following checklist records 103 species (75 aquatic) from Maryland. Comparable lists of aquatic species for other states are as follows: 53 species recorded from Florida by Young (1954); 20 species recorded from Ithaca, New York by Swenson (1982); 67 species from North and South Carolina by Brigham (1982); and 47 species from Illinois by Wooldridge (1967). Hatch (1965) recorded 128 species (of all habitats, 102 aquatic) from the Pacific Northwest; and 88 species (67 aquatic) reported from New York by Leng (1928).