25,971 research outputs found
Author Peter FitzSimons speaking at the National Library of Australia, Canberra, 13 November 2012 /
No full textTitle from acquisitions documentation.; Part of the collection: Portraits of author Peter FitzSimons speaking at the National Library of Australia, Canberra, 13 November 2012.; Acquired in digital format; access copy available online.; Mode of access: Online.; Photographed by a staff member of the National Library of Australia
Java Threads in the Light of occam/CSP
No full textJava provides support for parallel computing through a model that is built into the language itself. However, the designers of Java chose to be fairly conservative and settled for the concepts of threads and monitors. Monitors were developed by Tony Hoare (and others) in the early 1970s as a structured way of using semaphores to control access to shared resources. Hoare moved away from this, in the late 1970s, to develop the theory of Communicating Sequential Processes (CSP). One reason was that the semantics of monitors are not WYSIWYG, so that designing robust parallel algorithms at this level is seriously hard. This tutorial will look at how this impacts on threaded applications written in Java. Fortunately, it is possible to introduce the CSP model into Java through sets of classes implemented on top of its monitor support. By restricting interaction between active Java objects to CSP synchronisation primitives, Java thread semantics become compositional and systems with arbitrary levels of complexity become possible. Multi-threadedWeb applets and distributed applications become simpler to design
and implement, race hazards never occur, difficulties such as starvation, deadlock and livelock are easier to confront and overcome; and performance is no worse than that obtained from directly using the raw monitor primitives. The advantages of teaching parallelism in Java purely through the CSP class librarieswill be discussed. These libraries were developed jointly at Kent and Oxford Universities in the U.K. and the University of Twente in the Netherlands. This paper was developed from material first presented at the Java Threads Workshop [1]. It presents the basic threads model of Java, discusses why they may be a good thing but why they need special care in their management, runs through the monitor mechanisms provided in Java for their control and points out weaknesses in that control. Finally, the CSP primitives are introduced and the case for ignoring the monitor methods presented. This work is one of the foundation stones of the JavaPP project [2], which spun out from the above workshop. The other founding stones [3, 4, 5, 6] were first presented at the WoTUG-20 conference last year
Symplectoscyphus commensalis Vervoort 1993
No full textSymplectoscyphus commensalis Vervoort, 1993 Fig. 17 F–G Symplectoscyphus commensalis Vervoort, 1993: 247, figs 56C–F, 57, 58A–E. Material examined PACIFIC OCEAN • female colony with stems up to 1 cm high on stem of sertulariid hydroid; off New Caledonia, stn DW4670; 22°58′ S, 167°24′ E; 680– 612 m; 12 Aug. 2016; KANACONO leg.; one stem was used for DNA extraction, DNA 1389; voucher MHNG-INVE- 120850; barcode identifier MK 073103; MNHN-IK-2015-399. Remarks A small species, with minute hydrothecae resembling those of S. ralphae Vervoort, 1993 through their shape and size (compare Fig. 17F with Galea 2016: fig 10Q–T). Unlike S. commensalis that forms irregularly-branched colonies (up to 2 nd order branches observed), the latter builds regularly-pinnate colonies. In addition, their respective gonothecae are different [compare Fig. 17G with Galea 2016: fig. 10U–V). Distribution Only known from off New Caledonia (Vervoort 1993; present study). ? Symplectoscyphus elongatulus Galea, sp. nov. urn:lsid:zoobank.org:act: E30569 B6-8BC4-4B3C-8E84-8EC1A2300839 Figs 16B, 17 H–J; Tables 8, 10 Diagnosis Sparingly-branched symplectoscyphid forming delicate, coplanar colonies, with erect, monosiphonic stems. Internodes long, slender, distinctly geniculate, each carrying distally a hydrotheca; the latter long, slightly conical, smooth-walled, adnate for ⅓, abaxial wall straight or nearly so, free adaxial wall imperceptibly convex proximally, and distinctly concave below aperture; adaxial cusp produced, slightly everted; eight internal, submarginal projections of perisarc. Gonothecae unknown. Etymology From the Latin ‘ ēlongo, -āvi, -āre ’, meaning ‘to lengthen’, with the apposition of the suffix ‘ -ulus, -ula, ulum ’, as a diminutive, to characterize the shape of the internodes of this delicate, straggling species. Material examined Holotype PACIFIC OCEAN • a 5.1 cm high colony without gonothecae; off New Caledonia, stn DW5010; 22°10′ S, 159°03′ E; 290–820 m; 19 Sep. 2017; KANADEEP leg.; MNHN-IK-2015-463. Description Colony erect, 5.1 cm high, arising from creeping hydrorhiza. Stem monosiphonic, flaccid, unable to support itself when out of liquid; basal 1.6 cm ahydrothecate, with smooth perisarc; remainder of stem divided into regular internodes by means of indistinct oblique nodes slanting in alternate directions; internodes distinctly geniculate, long, each bearing distally a hydrotheca; branching sparse, irregular: only two side branches, neither branching further, occur in the present specimen; they are given off laterally and in opposite directions, from below the bases of two distant stem hydrothecae, and are coplanar. Hydrothecae long, slightly conical, adnate for ⅓ or less to their corresponding internodes; abaxial wall straight for most of its length, imperceptibly convex distally; free adaxial wall slightly sigmoid, convex for most of its length, then concave towards aperture; aperture three-cusped, adaxial cusp slightly produced, latero-abaxial cusps less prominent, with rounded tips, separated by wide, shallow embayments; operculum composed of three triangular flaps meeting centrally to form a pyramidal roof; 8 internal, submarginal projections of the perisarc: one minute adaxial, two pairs of latero-adaxial, one large abaxial, and two latero-abaxial. Gonothecae not observed. Remarks Only a restricted number of congeners display a combination of long, slender, geniculate internodes and weakly-adnate hydrothecae, namely: S. amphoriferus Allman, 1877 (Millard 1977; Schuchert 2001), S. bathyalis Vervoort, 1972 (original account, Calder & Vervoort 1998), S. dentiferus (Torrey, 1902) (Nutting 1904), S. effusus Vervoort, 1993 (original account, Galea 2016), S. macrocarpus (Billard, 1918) (original account, Billard 1925), S. minutus (Nutting, 1904) (original account), S. naumovi Blanco, 1969 (Peña Cantero et al. 2002), S. nesioticus Blanco, 1977 (original account, Peña Cantero et al. 2002), S. paucicatillus Galea, 2016 (original account), S. paulensis Stechow, 1923 (Vervoort 1993; present report), S. pedunculatus (Billard, 1919) (Billard 1925; Vervoort 1993) and S. plectilis (Hickson & Gravely, 1907) (Millard 1977). However, in any of these the hydrothecae do not adopt the distinctive shape met with in S. elongatulus sp. nov., and none displays submarginal, intrathecal cusps. Through its Sertularella -like hydrothecae, provided with only three marginal cusps, the present species comes close to? Symplectoscyphus acutustriatus sp. nov. (see above), whose systematic position is discussed in the ‘Molecular study’ section. Distribution Only known from off New Caledonia (present study).Published as part of Galea, Horia R. & Schuchert, Peter, 2019, Some thecate hydroids (Cnidaria: Hydrozoa) from off New Caledonia collected during KANACONO and KANADEEP expeditions of the French Tropical Deep-Sea Benthos Program, pp. 1-70 in European Journal of Taxonomy 562 on pages 48-50, DOI: 10.5852/ejt.2019.562, http://zenodo.org/record/347430
Moral Good, the Beatific Vision, and God’s Kingdom Writings by Germain Grisez and Peter Ryan, S.J.. Edited by Peter J. Weigel
No full textFor close to half a century, the work of Germain Grisez has been highly influential, and his writings continue to receive considerable attention from philosophers and theologians of diverse viewpoints. His co-author for this work is the professor and noted moral theologian Fr. Peter Ryan, S.J., currently the executive director of the Secretariat of Doctrine and Canonical Affairs of the United States Conference of Catholic Bishops (USCCB). These two eminent scholars explore fundamental questions about Christian eschatology, moral theory, the purpose of human life, and the promise of human fulfilment. The authors examine Christian teaching on the final destiny of persons, investigating the meaning of God's kingdom, the hope of the beatific vision, and the centrality of moral goodness and divine grace in one's final end. This work is an ideal source for students, scholars, ministers and lay persons interested in basic questions of Christian theology, the philosophy of religion, ethical theory, and Catholic doctrin
Symplectoscyphus ralphae Vervoort 1993
No full textSymplectoscyphus ralphae Vervoort, 1993 Symplectoscyphus ralphae Vervoort, 1993: 270, figs 65E–F, 66A–C. Symplectoscyphus ralphae – Galea 2016: 45, fig. 10M–V. Material examined PACIFIC OCEAN • male colony with stems up to 1.4 cm high, on axis of antipatharian; off New Caledonia, stn DW4714; 22°49′ S, 167°25′ E; 394–443 m; 18 Aug. 2016; KANACONO leg.; MNHN- IK-2015-395 • two female colonies, 2.6 and 3.7 cm high, respectively; off New Caledonia, stn DW4784; 22°51′ S, 167°44′ E; 310–322 m; 29 Aug. 2016; KANACONO leg.; MNHN-IK-2015-396 • a colony composed of several stems up to 1.4 cm high, one of them with a female gonotheca; off New Caledonia, stn DW4715; 22°50′ S, 167°27′ E; 424 m; 18 Aug. 2016; KANACONO leg.; MNHN-IK-2015-397 • a stem 2.5 cm high with male gonothecae; off New Caledonia, stn CP4675; 22°50′ S, 167°30′ E; 350– 366 m; 13 Aug. 2016; KANACONO leg.; used as a whole for DNA extraction, DNA 1392; MHNG- INVE- 120853 • male and female colonies with stems up to 4 cm high, on different substrates; off New Caledonia, stn CP4674; 22°48′ S, 167°29′ E; 311– 302 m; 13 Aug. 2016; KANACONO leg.; MNHN- IK-2015-398 • a profuse male colony, with stems up to 1.8 cm high; off New Caledonia, stn DW4720; 22°50′ S, 167°11′ E; 374–400 m; 19 Aug. 2016; KANACONO leg.; a fertile stem was used for DNA extraction, DNA 1391; voucher MHNG-INVE- 120852; barcode identifier MK 073105; MNHN- IK-2015-469. Remarks In view of the present material, always fertile, it can be now stated that the gonothecae are sexually dimorphic, as suspected earlier by Galea (2016). Female gonothecae are longer and larger, and possess a larger number of transverse ridges, and a comparatively wider terminal funnel. Distribution New Caledonia (Vervoort 1993; present study), Norfolk Ridge (Galea 2016).Published as part of Galea, Horia R. & Schuchert, Peter, 2019, Some thecate hydroids (Cnidaria: Hydrozoa) from off New Caledonia collected during KANACONO and KANADEEP expeditions of the French Tropical Deep-Sea Benthos Program, pp. 1-70 in European Journal of Taxonomy 562 on pages 51-52, DOI: 10.5852/ejt.2019.562, http://zenodo.org/record/347430
Murder on the mountain: author talk with Peter J. Wosh
No full textAuthor talk by Peter J. Wosh on May 5th, 2022, on his book, "Murder on the Mountain: crime, passion, and punishment in gilded age New Jersey.
Lunchtime Talk with Author and Attorney Peter Godwin
No full textAuthor and attorney Peter Godwin gave a lunchtime talk about the topics discussed in his book, The Fear, which focuses on the human rights situation in Zimbabwe under the rule of Robert Mugabe
An essay about the Francis Paudras Collection on Bud Powell by Peter Pullman
No full textThis is an essay about the Francis Paudras Collection on Bud Powell written by Peter Pullman, a jazz scholar and author of Wail: The Life of Bud Powell (Brooklyn: Bop Changes, 2012).One image file (pdf)This project was supported by a Recordings at Risk grant from the Council on Library and Information Resources (CLIR). The grant program is made possible by funding from The Andrew W. Mellon Foundation
Professor Peter Singer speaking at the National Press Club Canberra, 11 February 2009 [picture] /
No full textTitle devised by cataloguer based on information from acquisitions documentation.; Part of the collection: Humanitarian author Professor Peter Singer at the National Press Club, Canberra, 11 February 2009.; Acquired in digital format; access copy available online.; Mode of access: Internet via World Wide Web.; Photographed by a staff member of the National Library of Australia, 2009
The Peter Martyr reader
No full textAccession Number: ATLA0001328116; Language(s): English; Issued by ATLA: 20080715; Publication Type: Review; Related Books/Electronic Resources: By: Vermigli, Pietro Martire, 1499-1562 Peter Martyr reader viii, 260 p. Publisher: Kirksville, Mo.: Truman State University Press, 1999. ATLA0001327874Source type: Electronic(1)http://search.ebscohost.com/login.aspx?direct=true&db=reh&AN=ATLA0001328116&loginpage=Login.asp&site=ehost-liv
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