909 research outputs found
Orbit design for future SpaceChip swarm missions in a planetary atmosphere
No full textThe effect of solar radiation pressure and atmospheric drag on the orbital dynamics of satellites-on-a-chip (SpaceChips) is exploited to design equatorial long-lived orbits about the oblate Earth. The orbit energy gain due to asymmetric solar radiation pressure, considering the Earth's shadow, is used to balance the energy loss due to atmospheric drag. Future missions for a swarm of SpaceChips are proposed, where a number of small devices are released from a conventional spacecraft to perform spatially distributed measurements of the conditions in the ionosphere and exosphere. It is shown that the orbit lifetime can be extended and indeed selected through solar radiation pressure and the end-of-life re-entry of the swarm can be ensured, by exploiting atmospheric drag
Development of the hub port of Colombo, Sri Lanka
No full textThe Port of Colombo, Sri Lanka, is an important hub port in the Indian Ocean. A hub port is a port with mainly transhipment (and in this case container) throughput, which means that most of the cargo is not for the country itself, but for countries in the region. The yearly container throughput at the Port of Colombo reached its full capacity of 1.7 million TEU per year in 1997. Increasing waiting times for ships calling at the port are a result of this. Because of the costs of a waiting ship, shipping lines will choose other ports in the region such as Singapore, Salalah (Oman) or Dubai (United Arab Emirates) for their ships to go to. The aim of this study is to develop a plan for a New Container Terminal, which will give the Port of Colombo enough container throughput capacity for the next 25 years: till the year 2025.Hydraulic EngineeringCivil Engineering and Geoscience
Dissomphalus miriamae Colombo & Azevedo, sp. nov.
No full textDissomphalus miriamae Colombo & Azevedo, sp. nov. (Figs 12, 150, 151) Description. Male. Head and mesosoma black; metasoma dark castaneous or black. Mandible with two apical teeth; clypeus broadly projected forward, median tooth weakly rounded; frons weakly coriaceous and punctate. Mesosoma. Weakly coriaceous. T2 without tergal process. Posterior hypopygeal margin concave. Genitalia: paramere small in dorsal view, apex rounded, arched, smaller than basiparamere; cuspis wide; digitus wide; aedeagal ventral ramus smaller than dorsal body, apex ill defined, laminar, narrow; aedeagal dorsal body with one pair of apical lobes, inner pair with apex rounded in dorsal view, inner pair weakly serrate; basal process ill defined; apodeme extending beyond genital ring. Female unknown. Remarks. This species is allocated in amplus species-group by having the tergal process absent. This species not is similar other of species-group. This species is mainly different because has the aedeagal dorsal body with one pair of apical lobes and inner pair weakly serrate. Material examined. Types: Holotype Ƌ, BRAZIL, E[spírito] S[anto]: Santa Teresa, Est [ação] Biol [ógica] de Santa Lúcia, 28.III.2001, varredura, Azevedo & Kawada col. (UFES). Paratypes: 2Ƌ, Santa Teresa, Est [ação] Biol [ógica] de Santa Lúcia, 31.V.2001, 2♂, 27.IX.2001, varredura, Azevedo & Kawada col. (UFES); 1♂, Santa Maria de Jetibá, Fazenda Paulo Seick, 20º02’S 40º42’W, 29.XI–06.XII.2002, armadilha Malaise, Tavares & Azevedo e eq[uipe] col. (UFES); 1♂, Vitória, P [ar]q[ue] Est [adual] Fonte Grande, 30.VI.2001, varredura, Azevedo & Kawada col. (UFES). Etymology. The epithet miriamae is in allusion to the mother’s second author name Miriam. Distribution. Brazil (Espírito Santo).Published as part of Colombo, Wesley D. & Azevedo, Celso O., 2016, Review of Dissomphalus Ashmead, 1893 (Hymenoptera, Bethylidae) from Espíri- to Santo, Brazil, with description of twenty-one new species, pp. 1-84 in Zootaxa 4143 (1) on pages 41-42, DOI: 10.11646/zootaxa.4143.1.1, http://zenodo.org/record/26075
Dissomphalus clovisi Colombo & Azevedo, sp. nov.
No full textDissomphalus clovisi Colombo & Azevedo, sp. nov. (Figs 9, 143, 144) Description. Male. Head and mesosoma black; metasoma dark castaneous or black. Mandible with two apical teeth; clypeus broadly projected forward, median tooth ill defined; frons weakly coriaceous, punctate. Pronotal disc coriaceous. T2 without tergal process. Posterior hypopygeal margin weakly concave. Genitalia: paramere wide in dorsal view, apex serrate, invagination serrate in ventral view, smaller than basiparamere; cuspis very wide; digitus sickle-shaped; aedeagal ventral ramus smaller than dorsal body, base narrow, wide middle part, apex narrow, laminar; aedeagal dorsal body with two pairs apical lobes, apex weakly bifurcated in dorsal view, inner pair weakly membranous; basal bar wide; apodeme extending beyond genital ring. Female unknown. Remarks. This species is allocated in amplus species-group by having the tergal process absent. This species not is similar other of species-group. This species is mainly different because has the aedeagal ventral ramus with wide middle part and apex narrow; aedeagal dorsal body with apex weakly bifurcated and aedeagal dorsal body with basal bar wide. Material examined. Types: Holotype Ƌ, BRAZIL, E[spírito] S[anto]: Santa Teresa, Est[ação] Biol[ógica] de Santa Lúcia, 26–29.VIII.2004, arm[adilha] Malaise, Tavares & equipe col. (UFES). Paratypes: 1Ƌ, Santa Maria de Jetibá, Fazenda Paulo Seick, 20º02’S 40º42’W, 06–13.XII.2002, armadilha Malaise, Tavares & Azevedo e eq[uipe] col. (UFES). Etymology. The epithet clovisi is in allusion to the father’s second author name Clovis. Distribution. Brazil (Espírito Santo).Published as part of Colombo, Wesley D. & Azevedo, Celso O., 2016, Review of Dissomphalus Ashmead, 1893 (Hymenoptera, Bethylidae) from Espíri- to Santo, Brazil, with description of twenty-one new species, pp. 1-84 in Zootaxa 4143 (1) on page 40, DOI: 10.11646/zootaxa.4143.1.1, http://zenodo.org/record/26075
Correction to: Biaxial bending of SFRC slabs: Is conventional reinforcement necessary? (Materials and Structures, (2019), 52, 1, (1), 10.1617/s11527-018-1302-0)
No full textThe article ‘‘Biaxial bending of SFRC slabs: Is conventional reinforcement necessary?’’, written by Marco di Prisco, Matteo Colombo and Ali Pourzarabi, was originally published electronically on the publisher’s Internet portal (currently SpringerLink) on 22 December 2018 without open access. The copyright of the article changed in December 2019 to The Author(s) 2019, and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http:// creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made
Post-War Optimism in Colombo, Sri Lanka
No full textAfter twenty-six years of civil conflict, Sri Lankan government has geared towards rapid urban beautification after the bloody victory over the Tamil Tigers. Since 2009, Colombo changed beyond recognition: the high walls around public institutions have come down, the military checkpoints disappeared, streets are clearer and inhabitants enjoy the new freedom of going out and using public places. Within this new political situation, the people of Sri Lanka have less and less influence over their rapidly changing surroundings. The design proposal for an educational center has all the optimal circumstances to facilitate and trigger political participation.Design as PoliticsArchitectureArchitectur
Spatial augmented reality and simulations to improve abdominal aortic aneurysm diagnosis and monitoring
No full textIn this work we propose an approach based on IT tools to improve all the clinical activities related
to Abdominal Aortic Aneurism (AAA) detection and treatment. In particular, the approach is focused
on a 3D CAD model of the AAA and CFD simulations to improve diagnosis by evaluation of rupture
risk indicators and Spatial Augmented Reality (SAR) to simulate endovascular repair (EVAR) of the
pathology. Geometric model of the vascular wall is build from Computer Tomography (CT) data by
using and customizing algorithms and tools implemented in Vascular Modeling ToolKit (VMTK) software
library. Four methodologies of geometry initialization are compared and we choose those able to
describe the vascular disease excluding any foreign tissue (i.e., bones, internal organs, and muscles).
An evaluation of the problems connected to the relative parameters of reconstruction, their influence
for the correct geometry representation, focusing the attention on segmentation level and the smoothing
of the surface, are presented. In particular, we point out the effect of the smoothing by the use
of the Hausdorff distance. We propose a standardized process able to guide users in the modeling
of this type of vessels; moreover, SAR can dramatically improve the efficacy of AAA visualization for
some different clinical aspects. The 3D geometry of the AAA can be used to carry out CFD analysis, to
calculate parameters of the blood flow and evaluate the rupture risk indicator, like Oscillatory Shear
Index (OSI). The availability of risk indicators facilitates the physician in the diagnosis and prognosis.
Finally, we present a methodology and tools to simulate EVAR on a specific patient based on geometry
reconstruction and CFD simulations; this type of procedure can effectively improve training and
facilitate endovascular surgery
Dissomphalus fredi Colombo & Azevedo, sp. nov.
No full textDissomphalus fredi Colombo & Azevedo, sp. nov. (Figs 3, 24, 77–80) Description. Male. Head and mesosoma black; metasoma dark castaneous. Mandible with two apical teeth. Median clypeal lobe trapezoidal, median tooth triangular. Frons strongly coriaceous, punctate. Pronotal disc strongly coriaceous. T2 with lateral pair of elliptical pits, bristles dense tufts present, their inner part of covered by translucid sclerite, so that hole hemispheric. Posterior hypopygeal margin weakly concave. Genitalia: paramere with apex rounded, slightly arched inward, very wide, specially basally; basivolsella wide projection, hemisphericshape; aedeagal ventral ramus longer than dorsal body, laminar, surface vertical, apex irregularly; aedeagal dorsal body with two pairs apical lobes, outer pair wide, rounded in lateral view, dorsal margin folded across its length, apical and ventral margins serrated, inner pair membranous and setose; apodeme not extending beyond genital ring. Female unknown. Variations. Tergal process with dense tufts or not; paramere with narrow apex. Remarks. This species is included in hemisphaericus species-group by having the tergal process hemisphericshaped with their inner part of covered by translucid sclerite. This species not is similar other of species-group. This species is mainly different because has the tergal process with bristles dense tufts and basivolsella with wide projection. This species goes to couplet 54 in the key proposed by Redighieri & Azevedo (2006) and should be read as: 54. Aedeagus not much wide, apex curved inward, outer dorsal body with corrugated surface and ventral margin strongly fringed, aedeagal ventral ramus narrow........................................................... D. undatus Azevedo - Aedeagus much wide or much short, apex not curved inward, outer dorsal body without corrugated surface and ventral margin weakly fringed, aedeagal ventral ramus wide.............................................................. 54a 54a. Posterior hypopygeal margin straight; paramere wider medially; aedeagal ventral ramus shorter than aedeagal dorsal body......................................................................................... D. gordus Azevedo - Posterior hypopygeal margin weakly concave; paramere very wide, specially basally; aedeagal ventral ramus larger than aedeagal dorsal body....................................................................... D. fredi sp. nov. Material examined. Types: Holotype Ƌ, BRAZIL, E[spírito] S[anto]: Domingos Martins, P [ar]q[ue] Est [adual da] Pedra Azul, 20º25’S 41º00’W, 26.VIII–2.IX.2003, Arm [adilha] Malaise, C.O. Azevedo & eq[uipe] col. (UFES). Paratypes: 4Ƌ, Santa Teresa, Estação Biológica de Santa Lúcia, 30.VII.2005 – 21.X.2014, [armadilha] Malaise, M. Tavares, C. Azevedo & eq[uipe] col. (UFES); 2♂, Santa Maria de Jetibá, Fazenda Clarindo Krüger, 20º04’S 40º44’O, 29.XI–13.XII.2002, armadilha Malaise, [M.T.] Tavares, [C.O.] Azevedo e eq[uipe] col. (UFES); 1Ƌ, Santa Maria de Jetibá, Fazenda Paulo Seick, 20º02’S 40º41’O, 29.XI–06.XII.2002, armadilha Malaise, [M.T.] Tavares, [C.O.] Azevedo e eq[uipe] col. (UFES); 9♂, same locality of holotype. 26.VIII–02.IX.2003, Arm [adilha] Malaise, C.O. Azevedo & eq[uipe] col. (UFES); 1♂, Domingos Martins, Pico do Eldorado, 20º22’S 40º39’W, 03– 10.XII.2004, [armadilha] Malaise, Tavares e equipe col. (UFES); 1♂, Ibitirama, Parque Nacional do Caparaó, 20º29’S 41º43’W, 10–14. III.2006, R. Kawada col. (UFES); 26♂, Ibitirama, Parque Nacional do Caparaó, 20º27’S 41º44’W, 16–23.III.2013, C.O. Azevedo & F.B. Fraga col. (UFES). Etymology. The epithet fredi is in allusion to the father’s first author name Frederico. Distribution. Brazil (Espírito Santo).Published as part of Colombo, Wesley D. & Azevedo, Celso O., 2016, Review of Dissomphalus Ashmead, 1893 (Hymenoptera, Bethylidae) from Espíri- to Santo, Brazil, with description of twenty-one new species, pp. 1-84 in Zootaxa 4143 (1) on pages 19-20, DOI: 10.11646/zootaxa.4143.1.1, http://zenodo.org/record/26075
Alongatepyris pedrocai Colombo & Perkovsky & Azevedo 2022, sp. nov.
No full text† Alongatepyris pedrocai Colombo & Azevedo, sp. nov. (Figs 2, 3) Type material. Holotype female, piece code WDC F-3, deposited in the IBES collection: a complete flat wasp is embedded in a median amber piece; some scattered debris obscuring particular details; no other animals and plants are present. The amber was not subjected to any fixation. Etymology. The specific epithet pedrocai is named after Pedroca, Pedro Dhaví Colombo Zanette’s nickname, nephew of the first author. Diagnosis. Head as long as wide in dorsal view. Anterior ocellus posterior to supra-ocular line. Posterior pronotal sulcus absent. Forewing with 2r-rs&Rs vein long and tubular.The species platunissimus and A. ingens are redraw digitally from Vargas & Azevedo (2008). Description. Female. Body length ~ 3.8 mm. Color: body mostly black, palpi and mandible dark castaneous; tarsi light castaneous;wings hyaline,veins light castaneous. Head as long as wide in dorsal view, not globoid in lateral view. Mandible apparently with three teeth, ventral tooth large. Clypeus with median lobe rounded and lateral lobes reduced. Eye located far from mandibular base, glabrous, elongated in lateral view, bulging in dorsal view. Antenna with flagellomeres wider than long, first flagellomeres shorter than distal ones; flagellar pubescence suberect; pedicel with apex dilated, longer than flagellomere I. Frontal line indistinct. Ocelli conspicuous. Anterior ocellus posterior to supra-ocular line. Dorsal pronotal area longer than mesoscutellum. Posterior pronotal sulcus absent. Notaulus not visible. Parapsidal signum present. Mesoscuto-scutellar suture with sulcus not visible. Mesopleuron with lower mesopleural fovea not visible. Macropterous. Forewing with three cells closed (C, R and 1Cu); C cell very narrow; 1Cu cell more than 2× shorter than R cell; Pterostigma small and prostigma large; flexion line simple distally; 2r-rs&Rs vein long and tubular. Mesotibia not spinose. Metapectal-propodeal disc long, touching posterior margin of anteromesoscutum; transverse anterior carina straight; metapostnotal median carina not visible; transverse posterior carina not visible. Tarsal claw simple. Metasoma polished. Remarks. The specimen described above is assigned to the genus Alongatepyris based on the following character states: (1) the body is flattened in the lateral view; (2) the eyes are placed forward on the head; (3) the antennae are composed by 11 flagellomeres; (4) the forewings are fully developed; and (5) the first cubital cell of the forewings is much reduced. The specimen considered here is morphologically similar to A. platunissimus, because the head is as long as wide and the 2r-rs&Rs veins of the forewings are long and tubular. The specimen is also morphologically similar to A. ingens because the dorsal pronotal area is ecarinate and the 1Cu cell of the forewings is more than 2× shorter than the R cell. The presence of morphological features of the two species previously described, A. platunissimus and A. ingens, supports that this lineage is different from its congeners. Additionally, † A. pedrocai, sp. nov. lived between 15–20 million years ago, adding further support to the validity of this species. Type locality and horizon. Dominican amber, Burdigalian / Langhian terrestrial amber in the Dominican Republic. Miocene, 15–20 million years ago.Published as part of Colombo, Wesley D., Perkovsky, Evgeny E. & Azevedo, Celso O., 2022, Synopsis of the rare genus Alongatepyris (Hymenoptera, Bethylidae), with description of the first extinct species from Dominican amber, pp. 57-65 in Palaeoentomology 5 (1) on pages 58-59, DOI: 10.11646/palaeoentomology.5.1.6, http://zenodo.org/record/628063
The Colombo Plan and 'soft' regionalism in the Asia-Pacific
No full textThe Colombo Plan for aid to South and Southeast Asia, launched in 1951 and continuing today in much-diminished form, is regularly invoked in Australia and New Zealand as a pioneering and progressive project through which closer understanding and engagement with Asia was achieved. It is widely acknowledged that the economic value of the Colombo Plan for developing countries may not have been outstanding, but the author argues that Colombo Plan information activities bred a new form of public relations in the foreign relations of its member countries. Especially in donor countries such as Australia and New Zealand, it gave rise to public diplomacy that responded partly to competitive impulses relating to overseas images, and partly to the demands of a centralized information bureau and to regional meetings of a consultative committee. In short, Colombo Plan activities fostered a cultural relations or an early \u27soft\u27 form of regionalism in the 1950s and 1960s that has been insufficiently understood
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