24 research outputs found
Increasing low frequency sound attenuation using compounded single layer of sonic crystal
No full textThe millipedes of the Maltese Islands (Central Mediterranean) (Diplopoda)
No full textPrevious records of millipedes from the Maltese Islands are very few. Gulia (1890) listes five species: Glomeris marginatus Leach, Julus terrestris Lin., Julus sabulosus Lin., Julus modestus Risso and Lysiopetalum foetidissimum Savi. None of these names is valid for any of the species found on the Islands during the present study and in the case of the "Julus" spp. it is even impossible to guess which of the Maltese species Gulia was referring to. In the modern literature we have only been able to find two records of millipedes from the Maltese Islands: Strasser (1969 a) recorded Schizophyllum oxypygum (= Ommotoiulus oxypygum) and the same author (Strasser, 1969 b) recorded Acanthopetalum sicanum.
The present study is based on a large collection of some 600 millipedes amassed over the period 1975-87 by systematic collecting in all Maltese habitat types and summarizes our taxonomic (HE) and ecological (PTS) knowledge of the Diplopoda of the Maltese Islands.peer-reviewe
Révision des Cancellariidae (Mollusca, Gastropoda) décrites par Grateloup (1827-1847) dans le Miocène des Landes (SW France)
No full textGrateloup (1827, 1832, 1847) described and illustrated numerous species of Cancellariidae from the Miocene of Landes (SW Aquitaine, France). A complete revision of his collection of Cancellariidae is presented here; about 80 registered specimens belonging to this familly are discussed. Geographic localities and stratigraphy of each species are discussed. An attempt of generic assignment is made for each taxon. We confirm the validity of the genus Gulia Jousseaume, 1887 and we complete its diagnosis; its differences from Ventrilia Jousseaume, 1887 are specified. Out of 32 figures published in 1847, only three (perhaps four) specimens seem to be missing. As a whole, one holotype by monotypy is present and we have found 16 specimens designated (here or previously) as lectotypes of 20 available taxa of the species-group (e.g., “varieties” with subspecific rank), created by the author or by subsequent authors; all are illustrated here. Twenty-two paralectotypes are also listed. The following species described by Grateloup are considered valid: Gulia deshayesana, Aneurystoma dufourii, Coptostoma (s.l.) laurensii, Bivetiella stromboides, Scalptia (s.l.) spinosa (senior synonym of S. (s.l.) spinifera), whereas “Cancellaria westziana” is considered a morph of Gulia acutangula. Moreover, two taxa are considered nomina dubia (“Cancellaria papyracea”, “Cancellaria varicosa var. subumbilicata”). The type specimens of some other valid species, created by posterior authors, are present in the Grateloup collection and are illustrated in this revision, e.g., Bivetiella subcancellata, Calcarata subhirta, ?Genus subsuturale, Sveltia salbriacensis. On the other hand, few other taxa created also from specimens illustrated by Grateloup are not considered valid, such as “Cancellaria subvaricosa” (nomen dubium), “C. gratteloupi” (synonymous with Gulia acutangula), C. battersbyi (synonymous with Calcarata subhirta). Finally, one species described by Grateloup from the Rupelian (“Fusus thorei”) may belong to the genus Loxotaphrus.Grateloup (1827, 1832, 1847) a décrit et figuré de nombreuses espèces de Cancellariidae du Miocène des Landes (SW Aquitaine, France). Une révision complète de sa collection de Cancellariidae est présentée ici (environ 80 spécimens appartenant à cette famille sont recensés). Les localités de provenance de chaque espèce sont discutées et les répartitions stratigraphiques en sont précisées. Un essai d’attribution générique est proposé et discuté pour chaque taxon. Nous confirmons la validité du genre Gulia Jousseaume, 1887 en complétant sa diagnose et en précisant ses différences avec Ventrilia Jousseaume, 1887. Sur les 32 figures publiées par Grateloup en 1847, trois (peut-être quatre) spécimens figurés n’ont pu être identifiés dans la collection. Au total, un holotype par monotypie a été recensé et nous avons retrouvé 16 spécimens désignés (ici ou précédemment) comme lectotypes de 20 taxons disponibles du niveau espèce ou sous-espèce (e.g., « variétés » ayant rang subspécifique), créés par l’auteur ou par des auteurs subséquents ; tous sont figurés ici. Vingt-deux paralectotypes sont également répertoriés. Les espèces suivantes créées par Grateloup sont considérées comme valides : Gulia deshayesana, Aneurystoma dufourii, Coptostoma (s.l.) laurensii, Bivetiella stromboides, Scalptia (s.l.) spinosa (synonyme plus ancien de S. (s.l.) spinifera), tandis que « Cancellaria westziana » est ici considérée comme morphe de Gulia acutangula. Deux taxons sont par ailleurs laissés en nomina dubia (« Cancellaria papyracea », « Cancellaria varicosa var. subumbilicata »). Les spécimens types de plusieurs autres espèces valides, créées par des auteurs postérieurs, sont présents dans la collection Grateloup et figurés dans cette révision, dont Bivetiella subcancellata, Calcarata subhirta, ? Genus subsuturale, Sveltia salbriacensis. Quelques autres taxons, également créés sur des spécimens figurés de Grateloup, ne sont en revanche pas validés, comme « Cancellaria subvaricosa » (nomen dubium), « C. gratteloupi » (synonyme de Gulia acutangula), C. battersbyi (synonyme de Calcarata subhirta). Enfin, une espèce décrite par Grateloup dans le Rupélien (« Fusus thorei ») pourrait appartenir au genre Loxotaphrus.</p
Fusion of
No full textRecent experiments on 12C + 24Mg and preliminary data on 12C + 26Mg show that we observe the hindrance phenomenon in these two systems that are close to the lighter ones relevant for astrophysics. The cross section at the hindrance threshold has a remarkably high value for 12C + 24Mg, while it is closer to an empirical systematics for 12C + 26Mg. The lowest-energy fusion cross sections of 12C + 24Mg are consistent with simple one-dimensional barrier penetration calculations, i.e. the coupling strengths seem to be strongly damped far below the barrier. Measurements at slightly lower energies would be essential to discriminate between different models and to allow reliably extrapolating to the lighter systems producing energy and elemental synthesis in stellar environments
Present distribution of the threatened killifish Aphanius fasciatus (Actinopterygii, Cyprinodontidae) in the Maltese Islands
No full textA survey of the nine localities from which the threatened Killifish Aphanius fasciatus has been recorded in the Maltese Islands showed that large and thriving populations exist at Salina, at the Simar and Ghadira bird sanctuaries and in reservoirs at Marsa and Ghadira. The Simar and Ghadira populations are introduced and originate from a mixture of animals collected from Salina and Marsa. The provenance of the Marsa population is unknown but it is possibly autochthonous to the Marsa area. The Salina and possibly the Marsa populations seem to be the only remaining natural populations of this species in the Maltese Islands.peer-reviewe
: Hindrance and oscillations
No full textBackground: The existence of fusion hindrance in the light heavy-ion systems of astrophysical interest is not
well established, so investigating slightly heavier cases may allow a reliable extrapolation towards the lighter
ones. The recent observation of a very high hindrance threshold in 12 C + 24 Mg (with a positive Q value for
fusion) at σfus 0.75 mb, misses a valid interpretation within current theoretical models.
Purpose: Our aim has been to search evidence for fusion hindrances in the nearby system 12 C + 26 Mg also
having Qfus > 0, and to obtain information on the underlying physics from a comparison of the two cases and
from coupled-channels calculations.
Methods: The experiment was performed in inverse kinematics using the 26 Mg beam from the XTU Tandem
accelerator of Laboratori Nazionali di Legnaro (LNL). The targets were thin 12 C evaporations isotopically
enriched to 99.9%. The fusion-evaporation residues were detected at small angles by a E - E -ToF detector
telescope following an electrostatic beam deflector.
Results: The fusion excitation function of 12 C + 26 Mg has been measured down to ≈5 μb. The astrophysical
S factor shows a maximum at an energy where the cross section is ≈0.03 mb, significantly lower than for
12 C + 24 Mg. This difference is confirmed by the comparison of the two S factors. coupled channel calculations
give a good account of the data, but they overpredict the cross sections below ≈0.03 mb. The logarithmic slopes
of the two excitation functions are superimposable to a large extent, with visible oscillations, more noticeable
for 12 C + 24 Mg.
Conclusions: The hindrance phenomenon is clearly observed in 12 C + 26 Mg. The difference between the
corresponding threshold energies for 12 C + 24,26 Mg might (only qualitatively) be attributed to the α-like structure
of 24 Mg. In the Jiang’s phenomenological systematics, the different behaviors of 12 C + 24,26 Mg make the situation
more complex, and call into question the extrapolation procedure toward the lighter systems of astrophysical
interest
PERLAWANAN ETNIS MUSLIM ROHINGYA TERHADAP KEBIJAKAN DISKRIMINATIF PEMERINTAH BURMA-MYANMAR
No full textThis research aims to give an explanation that there are resistances by
Muslim Rohingya in facing of discriminatory treatment or policies in Burma-
Myanmar. Where there are differences in the pattern of resistance that was
conducted over the span of 60 years or two periods of Government, namely the
Military Junta and the Transition to Democracy.
This research was based on cases which concerning discrimination against
Muslim Rohingya in Burma-Myanmar. In addition, the writing or preaching
majority so far shows about the suffering they have experienced, not what they
have done in response to the policy or discriminatory treatment in Burma-
Myanmar.
In this research, author used qualitative methods with literature study to
collect data and also inductive as an analysis technique. Several theories were
used to analyse this research, such as ethnic minorities, social movement theory,
social identity and discrimination to guide and strengthen the main argument of
this research. As a result, it is known that there are differences in pattern of
resistances conducted during two periods of Government. Patterns which
conducted during the first period or in Military Junta era over the opposition to the
Government directly, such as revolts or to migrate due to the policies of the
Burmese Citizenship Law in 1982. Whereas, in the second period of transition to
democracy, the resistance patterns do tend to be due to the prolonged ethnic
conflicts which eventually led to resistance patterns of migration and rejection of
the use of the Bengali identity in order to gain citizenship rights offered the
Government of Burma-Myanmar
Genomic insights into the Ixodes scapularis tick vector of Lyme disease
No full textFull author list omitted for brevity. For full list of authors see article.Ticks transmit more pathogens to humans and animals than any other arthropod. We describe the 2.1 Gbp nuclear genome of the tick, Ixodes scapularis (Say), which vectors pathogens that cause Lyme disease, human granulocytic anaplasmosis, babesiosis and other diseases. The large genome reflects accumulation of repetitive DNA, new lineages of retro-transposons, and gene architecture patterns resembling ancient metazoans rather than pancrustaceans. Annotation of scaffolds representing approximately 57% of the genome, reveals 20,486 protein-coding genes and expansions of gene families associated with tick-host interactions. We report insights from genome analyses into parasitic processes unique to ticks, including host 'questing', prolonged feeding, cuticle synthesis, blood meal concentration, novel methods of haemoglobin digestion, haem detoxification, vitellogenesis and prolonged off-host survival. We identify proteins associated with the agent of human granulocytic anaplasmosis, an emerging disease, and the encephalitis-causing Langat virus, and a population structure correlated to life-history traits and transmission of the Lyme disease agent
Pasolini Exercises: Pier Paolo Pasolini on a Journey through Italy (La lunga strada di sabbia)
No full textThe article analyses a holiday reportage La lunga strada di sabbia [TheLong Road of Sand] by Pier Paolo Pasolini, which is a record ofa journeymade by the Italian intellectual in 1959 along the coasts of Italian Penisula. The author seeks the answers to the following questions: Howdoes Pasolini talk about his journey? Which elements of the journey and theworld are the most important to the writer? She concludes that Pasolini uses thestrategy of holiday reportage to touch upon the essential themes of his laterworks – ordinary people, their living conditions, the pace of socio-economic changes. At the same time, Pasolini uses the literary genre of reportage to present a broader than usual affective [email protected] Literaturoznawstwa - Uniwersytet Śląski w KatowicachAchtelik Aleksandra (2015),Sprawcza moc przechadzki, czyli Polski literat we włoskim mieście, Katowice: Wydawnictwo Uniwersytetu Śląskiego.Agudo Arianna, de Castillo Ludovica (2021), Doppio movimento. 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