19,364 research outputs found
John Van Seters, Author or Redactor?
No full text In two recent articles and in his book, The Edited Bible,
Van Seters challenged the existence of a redactor in antiquity and the
subsequent development of redaction criticism as a viable method in biblical
literary criticism. This debate between whether a source of the Pentateuch, such
as J, or the writer of the Deuteronomistic History should be understood as
author or editor is reflected in the responses to Van Seters by Jean-Louis Ska,
Eckart Otto and Christoph Levin. In this essay Van Seters seeks to answer the
various points raised by these scholars and to clarify what is meant by an
ancient author as well as the view that the concept of editor is anachronistic
before the modern period. He also defends his view that both von Rad and Noth,
in the case of J, and Noth, in the case of Dtr, believed that the Yahwist and
Dtr were authors and historians and not merely editors. </jats:p
Author Correction: Establishment and equilibrium levels of deleterious mutations in large populations (Scientific Reports, (2019), 9, 1, (10384), 10.1038/s41598-019-46803-7)
No full textThe original version of this Article contained errors. Affiliations 1 and 2 were reversed. Secondly, Affiliation 7 was incorrectly given as ‘Institute for Cellular and Molecular Medicine, Department of Immunology, and SAMRC Extramural Unit for Stem Cell Research and Therapy, Faculty of Health Sciences, University of Pretoria, Pretoria, 0084, South Africa’. Thirdly, an affiliation was omitted for the author Michael S. Pepper, which is now listed as Affiliation 8. Fourthly, Affiliation 1 was omitted for the author Johan W. Viljoen. Finally, Augustinus J. van Zyl was incorrectly affiliated with ‘Institute for Maternal and Child Health, IRCCS ‘Burlo Garofolo’, Trieste, Italy.’ The correct author affiliations are listed below: Affiliation 1: Department of Electrical, Electronic and Computer Engineering, EBIT, University of Pretoria, Pretoria 0028, South Africa Johan W. Viljoen and J. Pieter de Villiers Affiliation 2: Development, Research and Technology Department, Hensoldt Optronics, Centu..
The biology of gnathiid isopod parasites and their role as vectors of fish blood parasites in South Africa
No full textEnglish: Research on marine fish parasites has been largely neglected in South Africa. This is
especially true for the temporary fish parasites of the isopod family Gnathiidae and fish
blood parasites of the family Haemogregarinidae. In this study, surveys were carried out
to determine the presence of gnathiid isopods and fish haemogregarines associated with
different intertidal and sub-tidal fish hosts over a period of four years, at two different
localities on the South African south coast. The study also focussed on the relationship
between gnathiids and haemogregarines, specifically the possibility that the gnathiid
Gnathia africana Barnard, 1914 might be a vector of the fish blood parasite
Haemogregarina bigemina Laveran and Mesnil, 1901. Laboratory work was conducted
to elucidate the life cycle of G. cfricana. It was found that G. cfricana has three larval
stages, consisting of three unfed (zuphea) and three fed (praniza) stages, with the final
stage praniza larvae moulting into either male or female adults. Forty days after their last
feed as praniza 3 larvae, mature females release stage 1 zuphea larvae. Detailed
information was also supplied on the feeding and digestion length for each larval stage.
The females of G. africana were re-described from the material collected. Furthermore,
other gnathiid larvae, not resembling any of the known species from South Africa, were
collected from three species of elasmobranchs as well as the evileye pufferfish. Both
groups of larvae were kept in the laboratory, where they moulted into adult males that did
not conform to the description of any other gnathiid species in South Africa, or worldwide.
These specimens were described as new species (Gnathia pantherinum sp. n. and
G. pipindae sp. n.), using light and scanning electron microscope observations. Extensive
information was also provided on the final life cycle stages of G panthertnum sp. n.
Special attention was given to finding distinguishing characteristics to identify females
and larvae of various species in the absence of males. Comparing material in this study
with information from the literature showed that the morphology of the pleotelson and
cephalosome appendages of females and larvae could be successfully used as
differentiating characteristics. The research conducted on fish haemogregarines led to
new distribution and host records for two known species, and the description of two new,
but un-named species. Development stages of H. bigemina were found in the gut of G.
africana larvae that had fed on H. bigemina-infected host fish. The data obtained from
these results was used to compile a complete life cycle for H. bigemina in both the fish
and the arthropod host.Afrikaans: Navorsing op mariene visparasiete in Suid Afrika is grootliks nagelaat. Dit is veral waar
vir die tydelike visparasiete van die isopood familie Gnathiidae en die visbloedparasiete
van die familie Haemogregarinidae. Die teenwoordigheid van isopode van die genus
Gnathia en vishaemogregarienes, was oor 'n periode van vier jaar by twee verskillende
lokaliteite aan die Suid-Afrikaanse suidkus ondersoek. Hierdie studie fokus ook op die
interaksie tussen verteenwoordigers van die genus Gnathia en haemogregarienes, en
spesifiek die moontlikheid dat die isopood, Gnathia africana Barnard, 1914 as vektor van
die haemogregarien, Haemogregarina bigemina, Laveran and Mesnil, 1901 kan optree.
Laboratoriumeksperimente was op die lewenssiklus van G. africana onderneem. Daar
was bevind dat die lewenssiklus van G. africana uit drie verskillende larwaalfases
bestaan. Die finale praniza 3 larf vervel in 'n volwasse mannetjie of wyfie. Wyfies gee
geboorte aan fase 1 larwes, 40 dae nadat sy as praniza 3 larf die visgasheer verlaat het.
Gedetailleerde inligting oor die voeding en vertering van elke larwaalfase word ook
verskaf. Die wyfies van G. africana word hierin vanaf die versamelde materiaal
herbeskryf. Isopood larwes, wat nie aan die beskrywings van die larwes van enige
bekende Suidelike-Afrika spesies voldoen het nie, is vanaf drie kraakbeenvisspesies en
die groenoogblaasop versamel. Beide hierdie groepe larwes is in die laboratorium
aangehou waar hulle na volwasse mannetjies vervel het. Hierdie mannetjies het nie
dieselfde einskappe as enige ander beskryfde spesie in Suid Afrika of die res van die
wêreld besit nie en is gevolglik as nuwe spesies, G. pantherinum sp. n. en G. pipinde sp.
n. beskryf. Die spesiebeskrywing is op lig-en skandeer-elektronemikroskoop
waarnemings gebaseer. Uitgebreide inligting oor die finale lewenssiklusstadiums van G.
pantherinum is ook verskaf. Spesiale aandag is aan die ondersoek na morfologiese
kenmerke om wyfies en larwes van verskillende spesies in die afwesigheid van
mannetjies te identifiseer, geskenk. Die materiaal gedurende hierdie studie versamel,
sowel as informasie uit literatuur, is vergelyk en daar is gevind dat die morfologie van die
pleotelson en die kefalosoomaahangsels suksesvol as onderskeidende kenmerke gebruik
kan word. Die navorsing op vishaemogregarines het tot nuwe verspreidings- en
gasheerrekords van twee bekende spesies gelei, sowel as die beskrywing van twee nuwe
spesies. Verskillende ontwikkelingstadiums van H. bigemina was in die maag van G.
africana larwes, wat op H. bigemina geïnfekteerde visse gevoed het, gevind. Die data
van bogenoemde resultate was gebruik om 'n volledige lewenssiklus van H. bigemina
vanuit beide die vis-en arthropopdgashere saam te stel
Monitoring biodegradation capacity of organic pollutants in the environment
No full textMicro-organismen zijn in staat om organische verbindingen om te zetten in minder schadelijke stoffen en spelen daarom een belangrijke rol bij het opruimen van milieuvervuiling. Voor beleidsmakers, landgebruikers en landeigenaren is het belangrijk dat er bij milieuverontreiniging goed toezicht wordt gehouden op de biologische afbraakprocessen en dat deze goed worden beheerst. Aangezien microbiële activiteit in het milieu wordt beïnvloed door diverse fysische, geochemische en biologische factoren, is nauwkeurige kennis van het afbraakproces hierbij noodzakelijk. In dit promotieonderzoek wordt de relatie tussen geochemische condities en de biologische afbraakcapaciteit van micro-organismen in het milieu beschreven, inclusief methoden om de activiteit en metabole functies van deze micro-organismen in het milieu te mete
Ebb and flood channel systems in the Dutch tidal waters
No full textThis paper should be considered as Van Veen's most important publication since his thesis. It summarizes the results of 20 years of intensive study of estuarine and tidal- basin morphodynamics in The Netherlands. The paper is testimony to Van Veen' s keen observational and artistic skills. His approach is nearly "Da Vincian" in the sense that he is not only a fascinated but also sharp observer of nature and tries to capture the essentials of the dynamic behavior of complex coastal systems in apparently simple sketches. Many of the natural systems that Van Veen studied have been regulated since; thus, this paper contains a set of irreplaceable, high- quality observations on the natural dynamics of tidal systems. Along with Robinson' s (1960) paper on ebb-flood channel systems, it forms an excellent introduction to the study of channel dynamics in estuaries, tidal inlets, and tidal basins. Unfortunately, Van Veen's paper was published in Dutch, with only a brief summary in English. Understandably though, the paper has received very limited recognition in the international literature. The present publication is a tribute to Professor Kees d'Angremond, who retired on November 28, 2001, from the chair of Coastal Engineering at Delft University of Technology. We have seized this occasion to publish an English version of Van Veen' s paper. The translation is annotated in order to put it in the perspective of our present-day ideas on coastal dynamics.Hydraulic EngineeringCivil Engineering and Geoscience
Painting and visuality in Van Dyck's Self-Portrait with a Sunflower
No full textTABLE OF CONTENTSCaroline van Eck and Edward Winters;
Part I The experience of the visual in Art History,
Aesthetics and Visual Culture: Visual culture and the history of art, David Peters Corbett;
Space without hiding places: Merleau-Ponty's remarks on linear perspective, Renée van de Vall;
Aesthetics and visual culture: looking at Andrew Pankhurst’s Night Painting, Edward Winters;
Ought painting be allowed to die?, Derek Matravers;
Part II Elucidating the Visual: Marcus Gheeraerdts’ Captain Thomas Lee, Lucy Gent;
Painting and visuality in Van Dyck’s Self-portrait with a Sunflower, John Peacock;
Sacred contagion: secular jewellery and votive transvaluation at the Santa Casa, Loreto, 1720-1820, Marcia Pointon;
Villas and vision: looking at Palladio’s villas from the road, Lex Hermans;
Staged experiences: the church designs of Nicholas Hawksmoor, Sophie Ploeg;
The unreliable eye: the decline of vision as a reliable source of knowledge in Dutch architectural theory of the nineteenth century, Petra Brouwer;
Mies van der Rohe – drawing in space, Victoria Watson; Shadow, shading and outline in architectural engraving from Fréart to Letarouilly, Nicholas Savage
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Rediscovery of Chonopeltis meridionalis Fryer, 1964 (Crustacea: Branchiura) from Labeo rosae Steindachner in the River Olifants, Mpumalanga, and the taxonomic status of C. victori Avenant-Oldewage, 1991 and C. koki Van As, 1992
No full textChonopeltis Thiele, 1900 presently comprises 14 species, it is endemic to Africa and its species show a high degree of host-specificity towards fish families and in some cases, individual fish species. Chonopeltis meridionalis Fryer, 1964 was originally described from Labeo rosae Steindachner collected in the River Nuanetsi in Rhodesia, now Zimbabwe, Limpopo River System. At the time of description C. meridionalis was the most southerly species of the genus. Chonopeltis victori Avenant-Oldewage, 1991 was described from the River Olifants, Mpumalanga, South Africa, which also forms part of the Limpopo River System. The host fish was Labeo rosae and Labeobarbus marequensis (A. Smith), whilst C. koki Van As, 1992 was described from Labeo cylindricus Peters, collected in the River Zambezi, Eastern Caprivi, Namibia. During surveys conducted in 2012, additional material of a species of Chonopeltis was collected from Labeo rosae in the River Olifants. Upon closer examination, the new material was identified as C. meridionalis. Further investigation revealed that C. victori and C. koki share a number of characteristics with C. meridionalis. This paper provides the first scanning electron microscopy of C. meridionalis, includes additional information on fully-mature as well as sub-adult males and females. Finally, it was concluded that C. victori and C. koki are junior synonyms of C. meridionali
The cult of St Nicholas in medieval Italy
No full textSt Nicholas was one of the most popular saints in medieval Italy. His cult attracted the attention
of popes, kings and emperors, and his shrine at Bari became an important international pilgrimage
destination. This thesis asks how the cult of St Nicholas came to be so widespread and popular in
Italy, and why the saint attracted the attention of diverse groups and individuals.
This thesis is structured around four chapters. The first demonstrates that through a
process of Latinisation the cult of St Nicholas became integrated within Italian literary traditions
and within a new spiritual era. Chapter Two reveals that this Latinisation also occurred within the
saint’s iconography. Chapters Three and Four are case studies of the cult in Puglia and Venice,
locations which claimed possession of the saint’s relics. These case studies show that the general
developments that the cult of St Nicholas underwent in Italy, identified in Chapters One and Two,
did not apply universally. Instead, the presence of the saint’s relics resulted in a different profile
of the saint in Bari and Venice. Through the process of Latinisation, the cult of St Nicholas
became updated and remained relevant for its new Italian audience; Chapters Three and Four
show alternative ways that the cult of St Nicholas gained widespread popularity.
This thesis presents for the first time an iconographical study of St Nicholas in Italian art,
which develops existing research of the saint’s Byzantine iconography. Chapter Four presents a
profile of the cult of St Nicholas in Venice in the Middle Ages, which is a significant oversight in
the literature. The thesis uses a variety of visual and textual sources, in particular fresco and
altarpiece representations, archival documents from Venice and Rome (including the Apostolic
Visitations), and under-exploited contemporary and antiquarian Venetian sources
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