Turbulent transport of impurities and their effect on energy confinement

By presenting linear and nonlinear gyrokinetic studies, based on a balanced neutral beam injection deuterium discharge from the DIII-D tokamak, we demonstrate that impurities alter the scaling of the transport on the charge and mass of the main species, and even more importantly, they can dramatically change the energy transport even in relatively small quantities. A poloidally varying equilibrium electrostatic potential can lead to a strong reduction or sign change of the impurity peaking factor due to the combined effect of the in-out impurity density asymmetry and the EXB drift of impurities. We present an approximate expression for the impurity peaking factor and demonstrate that impurity peaking is not significantly affected by impurity self-collisions.Comment: Accepted for publication in Plasma Physics and Controlled Fusio

A partial rostrum of the Porbeagle shark <i>Lamna nasus</i> (Lamniformes, Lamnidae) from the Miocene of the North Sea basin and the taxonomic importance of rostral morphology in extinct sharks

A fragmentary rostrum of a lamnid shark is recorded from the upper Miocene Breda Formation at Liessel (Noord-Brabant, The Netherlands); it constitutes the first elasmobranch rostral process to be described from Neogene strata in the North Sea Basin. Based on key features of extant lamniform rostra and CT scans of chondrocrania of modern Lamnidae, the Liessel specimen is assigned to the porbeagle shark, Lamna nasus (Bonnaterre, 1788). In addition, the taxonomic significance of rostral morphology in extinct sharks is discussed and a preliminary list of elasmobranch taxa from Liessel is presented

A new species of <i>Abdounia</i> (Elasmobranchii, Carcharhinidae) from the base of the Boom Clay Formation (Oligocene) in northwest Belgium

On the basis of isolated teeth, collected from the base of the Boom Clay Formation (Rupelian, Oligocene) at the SVK clay pit (Sint-Niklaas, NW Belgium), a new species of requiem shark, Abdounia belselensis sp. nov., is described. Affinities and heterodonty are discussed

Literature as a source for history The case of the Repen Ripangi (1886)

Teks sejarah berbeda dengan teks sastra. Teks sejarah menceritakan apa yang benar-benar terjadi di masa lalu sementara teks sastra tidaklah demikian. Oleh karena itu, sejarawan sering menghindari penggunaan teks sastra dalam penelitian mereka. Saya berargumen bahwa teks sastra dapat menambahkan dimensi lain pada wawasan sejarah, yang tidak ditemukan dalam dokumen sejarah. Analisis puisi Jawa berjudul Repen Ripangi dari abad kesembilan belas menunjukkan bahwa teks ini, selain memberikan laporan yang sangat menarik tentang pendamaian ideologis seorang reformis muslim, juga membuka jalan bagi penulisnya dalam menyuarakan kritiknya terhadap kekuasaan kolonial Belanda

The taxonomic value of rostral nodes of extinct sharks, with comments on previous records of the genus <i>Lamna</i> (Lamniformes, Lamnidae) from the Pliocene of Lee Creek Mine, North Carolina (USA)

Shark rostral nodes from the Yorktown Formation (Zanclean, early Pliocene) of Lee Creek Mine, North Carolina (USA), previously assigned to the genus Lamna Cuvier, 1816, have been reinterpreted using a preliminary identification key for extant Lamniformes based on rostral morphology. In addition, the fossil rostral nodes have been compared in detail with Recent material of both the porbeagle, Lamna nasus (Bonnaterre, 1788) and the salmon shark, Lamna ditropis Hubbs and Follet, 1947. Despite the fact that the rostra compared relatively well with those of Recent Lamna, the Lee Creek Mine specimens proved to differ significantly in having near-parallel lateral rostral cartilages that join the rostral node individually, instead of abutting ones. Based on this observation, we here propose to strike the genus Lamna from the Lee Creek Mine faunal list, so long as no other diagnostic material is forthcoming. These partially preserved rostra are likely to have belonged to extinct taxa within the families Lamnidae or Otodontidae, both of which have been documented from the Yorktown Formation on the basis of isolated teeth of at least three species, Cosmopolitodus hastalis (Agassiz, 1838), Megaselachus megalodon (Agassiz, 1835) and Parotodus benedenii (Le Hon, 1871)

Dharmawangśa’s heritage: On the appreciation of the Old Javanese Mahābhārata

As we all know, the Old Javanese Mahābhārata was not created from scratch by a Javanese author but was translated (in some sense) from the Sanskrit. The story of Hiḍimbī reveals an interesting difference between the Old Javanese version and the Sanskrit version of the text. In the latter2 Hiḍimbī appeals to Kuntī, Bhīma’s mother, after Bhīma keeps rejecting her. However, it is not Kuntī who gives the answer but Yudhiṣṭhira, her son: he is the one who gives permission to Hiḍimbī to take Bhīma as her husband. We should remember that Kuntī at this point in the story is a widow; her husband died a long time ago. Yudhiṣṭhira is her eldest son. In the Old Javanese version it is Kuntī herself who answers Hiḍimbī.<br />This difference between the Sanskrit Mahābhārata and the Old Javanese Mahābhārata is interesting, because it reflects a well-known difference between traditional Indian and Indonesian societies concerning the position of women. It is archetypical for the difference between the two versions of the text in general: the Old Javanese version follows the story faithfully but gives its own twist to it. This interpretation, I have to admit, is not generally accepted. The established scholarly opinion has it that the Old Javanese Mahābhārata is a shortened derivative, meaning that it copies or imitates the Sanskrit story, shortening it without adding anything new to the story

Atheism as a Concealable Stigmatized Identity: Outness, Anticipated Stigma, and Well-Being

In a preliminary exploration of atheists using a concealable stigmatized identity framework, we investigated outness, identity magnitude, anticipated stigma, and psychological and physical well-being. Atheists (N = 1,024) in the United States, completed measures of outness, atheist identity magnitude, anticipated stigma, and psychological and physical well-being online. Consistent with predictions, we found small but significant associations between (a) anticipated stigma and well-being, (b) social components of atheist identity magnitude and outness as well as well-being, and (c) outness and well-being. A significant and moderate association was found between anticipated stigma and outness. There were significant, small indirect effects of ingroup ties, a social component of atheist identity magnitude, on psychological and physical well-being via outness; and of ingroup affect, another social component of magnitude, on psychological well-being via disclosure of atheist identity. Implications for research, practice, and training are offered