11,329 research outputs found
Seismic structural and non-structural performance evaluation of highly damped self-centering and conventional systems
No full textThis paper evaluates the seismic structural and non-structural performance of self-centering and conventional structural systems combined with supplemental viscous dampers. For this purpose, a parametric study on the seismic response of highly damped single-degree-of-freedom systems with self-centering flag-shaped or bilinear elastoplastic hysteresis is conducted. Statistical response results are used to evaluate and quantify the effects of supplemental viscous damping, strength ratio and period of vibration on seismic peak displacements, residual displacements and peak total accelerations. Among other findings, it is shown that decreasing the strength of nonlinear systems effectively decreases total accelerations, while added damping increases total accelerations and generally decreases residual displacements. Interestingly, this work shows that in some instances added damping may result in increased residual displacements of bilinear elastoplastic systems. Simple design cases demonstrate how these findings can be considered when designing highly damped structures to reduce structural and non-structural damage
La maladie imaginaire
No full textPieter Kalbfleisch, voorzitter van de raad van bestuur van het Residentie Orkest, weet dat het moeilijk is, misschien wel onmogelijk, om een symfonisch orkest te leiden als een winstgevende onderneming. Zoals in december 2010 in een NRC-krantenartikel stond leiden alle Nederlandse symfonieorkesten verlies en hebben ze aanzienlijke subsidies nodig om rond te komen. Afhankelijk van het orkest is de gemiddelde subsidie ??tussen de 50 tot 150 euro per ticket per voorstelling. Het krantenartikel is geschreven voorafgaand aan de discussie in de Nederlandse Tweede Kamer over plannen van de overheid voor enorme bezuinigingen in de culturele subsidies. Die bezuinigingen zullen de voorzitter van de raad 's nachts wakker houden. Kijkend naar de rock-ster-status van Andre Rieu en zijn Johann Strauss Orkest, toonbeeld van het Nederlandse culturele export succes, kan men tot de conclusie komen dat sommige kunstbedrijven een deel van de tijd winst maken, terwijl de meeste muziek-, dans- en theatergezelschappen altijd verlies lijden. De laatsten hebben naar eigen zeggen een perfect excuus. Ze zouden lijden aan de ziekte van Baumol; een ziekte waardoor verliezen onvermijdelijk zijn als een zonsopgang in de ochtend. Deze ziekte verklaart de noodzaak voor permanente overheidssubsidies en filantropische hulp en geeft de sector een sterk argument waarom podiumkunsten niet kunnen opereren in een concurrerende markt. De vraag is waarom het Johann Strauss Orkest geen last heeft van de ziekte. De ziekte is, voor een groot deel, niet-bestaand. Het is zoals de titel van Molière's paradepaardje van het Franse theater in 1673 'une maladie imaginaire'
Inelastic neutron scattering study of proton dynamics in Cs<sub>3</sub>H(SeO<sub>4</sub>)<sub>2</sub> and Rb<sub>3</sub>H(SeO<sub>4</sub>)<sub>2</sub>
No full textThe proton dynamics of the CsH(SeO) and RbH(SeO) have been studied by inelastic neutron scattering in a temperature range from 5 K to 60 K. The results are discussed in comparison with the isostructural acid sulphates, however the dynamics of the selenates is quite different. The splitting of selenate bands at low temperatures for both Cs and Rb salts indicate a phase transition to low symmetry. The anomalous temperature dependence of hydrogen bond bending modes in the Cs salt is discussed in the framework of interactions between strongly anharmonic stretching modes and bending vibrations
Quickscan 3: evaluatie sectorplannen
No full textSEO Economisch Onderzoek en ecbo voeren de monitoring en evaluatie van de Regeling Cofinanciering Sectorplannen uit. Als deel van deze evaluatie wordt tot en met 2018 zes maal een quickscan gepubliceerd. De zes quickscans geven een overzicht van de stand van zaken. Daarbij leveren deze quickscans ook input voor de tussenevaluaties in 2016 en 2018 en de eindevaluatie in 2019. Deze derde quickscan inventariseert de inhoud van de sectorplannen, de voorgenomen maatregelen en de voortgang (per eind september 2015) van de maatregelen. Daarnaast wordt ingegaan op de meningen over de samenwerking binnen de plannen. In de eerste twee tranches zijn 76 sectorplannen in uitvoering waaraan in totaal 395.265 personen werden beoogd deel te nemen. In totaal is € 354 miljoen aan cofinanciering toegekend, daarnaast is er een eigen financiering vanuit de sectoren van € 683 miljoen. Van de 395.265 geplande deelnemers zijn er tot nog toe 146.870 gerealiseerd. Daarbij loopt ongeveer de helfdt van de maatregelen achter op schema. De voortgang bij ongeveer 45 procent van de maatregelen ligt op schema en 5 procent loopt voor op schema. Deze quickscan bevat meer gegevens over de sectorplannen en de in de plannen opgenomen maatregelen en de voortgang daarvan
Thermal evolution of hydrates in carbonation-cured Portland cement
No full textThe present study investigates the thermal evolution of hydrates in carbonation-cured Portland cement. Paste samples were placed in a carbonation chamber after the 24 h of initial curing, while reference samples were cured in a sealed condition until 28 days. Thermogravimetry, unconfined strength tests, X-ray diffractometry, and solid-state 29 Si and Al-27 MAS NMR spectroscopy were conducted. The results showed that the binder gel in carbonation-cured cement shares some structural similarities with aluminosilicate glass in terms of Si and Al analogues. This characteristic was also reflected by its thermo-gravimetric behavior, presenting much less weight loss associated with dehydration in comparison with hydrated cement. However, the binder gel in carbonation-cured cement underwent depolymerization into monomeric Si at 800 degrees C, similar to hydrated cement. Moreover, carbonation-cured cement underwent crystallization pathway identical to that of hydrated cement, displaying a hydrate-like thermal behavior.
Free-form sketching of self-occluding objects
No full textWhen 3D objects occlude each other or self-occlude, their drawings typically Consist of a set of contours that might partially overlapor self-overlap. The authors' method infers the hiciden partsof contours and creates a smooth 30, shape matching those contours by solving a set of optimization problems.We thank Sung-Yong Shin, Young-Sang Cho, and
Otfried Cheong (Korea Advanced Institute of Science
and Technology) for their invaluable advice and useful
comments. This work was supported by the Korea
Research Foundation Grant funded by the Korean Government
(KRF-2006-531-D00033), and author Cordier
was supported by the Graduate School of Culture Technology
(Ministry of Culture and Tourism of Korea)
Quickscan 2: evaluatie sectorplannen
No full textSEO Economisch Onderzoek en ecbo voeren de monitoring en evaluatie van de Regeling Cofinanciering Sectorplannen uit. Als deel van deze evaluatie wordt tot en met het voorjaar van 2016 elk half jaar een quickscan gepubliceerd. De vier quickscans geven een overzicht van de stand van zaken. Daarbij leveren deze quickscans ook input voor de evaluatie in 2016 en 2018. Deze tweede quickscan inventariseert de inhoud van de sectorplannen, de voorgenomen maatregelen en de voortgang (per eind maart 2015) van de maatregelen. Daarnaast wordt ingegaan op de mening over het aanvraag- en monitoringproces en bevat het een korte versie van het beleidstheoretisch kader dat zal worden gebruikt voor de brede evaluatie in 2016 waarin zal worden gekeken of doelstellingen van de Regeling Cofinanciering Sectorplannen bereikt zijn. In de eerste twee tranches zijn 77 sectorplannen in uitvoering waaraan in totaal 429.894 personen werden beoogd deel te nemen. In totaal is € 423 miljoen aan cofinanciering toegekend, daarnaast is er een eigen financiering vanuit de sectoren van € 776 miljoen. Van de 429.894 geplande deelnemers zijn er tot nog toe 80.807 gerealiseerd. Daarbij lopen bijna 60 procent van de maatregelen achter op schema. De voortgang bij ongeveer een derde van de maatregelen ligt op schema en 41 maatregelen (9 procent) lopen voor op schema. Deze quickscan bevat meer gegevens over de sectorplannen en de in de plannen opgenomen maatregelen en de voortgang daarvan
Amynthas gageodo Blakemore & Park & Seo 2012, sp. nov.
No full textAmynthas gageodo Blakemore, sp. nov. Diagnosis: Size 150–170 mm. Spermathecal pores lateral in 5/6/7/8/9. Dorsal pores from 12/13. Genital markings as closely paired, mid-ventral, presetal discs in 8–10, 11 and in 17, 18–20 plus more widely paired postsetal discs in 8–9 and 18–19, 20 (total numbering up to twenty six with some markings unpaired unilateral, or all more widely paired). Intestinal caeca simple from 27. Distribution: South Korea, Gageo-do Island, on slopes of Mt Doksil (34° 4' 32.73 N, 125° 6' 31.88 E; summit 639m). Material inspected: Holotype (H), NIBR IV0000245037, mature specimen fixed in formalin and stored in 70% ethanol (EtOH), here dissected and figured (Fig. 1), collected 27.VII.2011 by Dr H.-Y. Seo and T. S. Park; Paratype (P1), IV0000245038, undissected mature, highly contracted after fixation in 100% EtOH, with a small tissue sample taken for DNA amplification and COI barcoding analysis, collection details as for H; P2, IV0000245039, ditto P1; P3, IV0000245040, ditto P1; P4, IV0000245041, undissected mature specimen with irregular annuli in segments 19 and 20, in same batch as holotype (H); P5–P11, IV0000245042, seven mature specimens fixed in formalin in a separate jar with same collection information except that collection date was 26.IX.2011. Etymology: Noun in apposition after the Island’s current name (previously Gaga-do meaning “Beautiful Island” also called Soheuksan-do or Little Heuksan Island from the Japanese colonial period; since 1896 it is known as Gageo-do or “Liveable Island”). Description: Body length 155 mm (holotype H), ca. 150–170 mm paratypes, segments 91 (H). In life, a dark greyish-brown; preserved, dorsum dark grey to ca. 23 then brown with lighter grey clitellum and paler ventrum. First dorsal pore 12/13. Setae 66–74 per segment behind segment 12 (H, P1). Spermathecal pores ca. 0.3 circumference apart in 5/6/7/8/9. Genital markings closely paired mid-ventral and presetal disks in 8–9,10,11 and in 17,18–19,20 plus more widely paired and postsetal in 8–9 and 18–19,20; thus usually eight or more in both spermathecal and male fields, with some markings unpaired, unilateral; occasionally all presetal markings in 8–10 paired as widely as the postsetal ones in 8–9 e.g. in P2 and one of paratypes P5–11. Maximum markings per worm were twenty-four in one of the latter paratypes (150 mm long posterior-amputee) that had two unilateral markings (in 8 and 20), thus indicating potentially thirteen pairs or twenty-six markings in total. Internally, small sessile glands correspond to the external genital markings. Other accessory glands found neither in spermathecal nor male fields. The pharyngeal mass extends to 4 and tufted meroic nephridia are in forests on anterior of 5/6 and 6/7. Septa none especially thickened, 8/9/10 are aborted; 10/11/12/13 are slightly stronger, thereafter membranous. Spermathecae in 6–9 with slender, clavate diverticula (terminal bulbs inseminated) each about half the length of the duct plus saccular ampulla combined. Dorsal vessel single; hearts in 10–13. Testis in small sacs, paired anteriorly in 10 and 11; seminal vesicles moderately large in 11 and 12; pseudovesicles on posterior of 12/13 and 13/14 (the latter possibly vestigial ovisacs). Ovaries and funnels in 13. Intestine origin in 16 with simple caeca from 27 extending forward to 24; typhlosole not found. Gut contains organic debris suggesting a detritivorous diet. Remarks: The current species appears particularly close to A. carnosus (Goto & Hatai, 1899) from Japan, Korea and probably China which is itself comparable to Chinese A. pingi (Stephenson, 1925) that is provisionally maintained separately as per Blakemore (2002, 2003a, 2003b, 2008, 2010b, 2012). Kobayashi (1936a) studied two Japanese specimens of A. carnosus (sent with tacit agreement of S. Hatai, the original author) plus 204 Korean specimens having variations of up to eight markings in some of 7,8–9 and six or fewer in 18–19. Kobayashi (1936a) also placed his Pheretima kyamikia Kobayashi, 1934 in synonymy as soon as this became apparent – as any good scientist would – and he considered the genital marking variations he encountered encompassed those in A. pingi. Indeed, Chen (1933: 231) had allowed papillae as rarely absent or one to three pairs (occasionally up to five pairs in total) near male and spermathecal pores in his concept of A. pingi, while having fourteen or fewer markings seems permissible for A. carnosus proper (Blakemore 2012). In contrast, A. gageodo markings may total up to twenty-six, with eight to twelve preclitellar markings and a similar number and arrangement in the corresponding postclitellar male pore region. On this feature alone, it is considered a species new to science with unambiguous objective confirmation provided via DNA COI barcoding of its types (Appendix). Habitat and Species Associations: Humid litter layer of dense silver magnolia (Magnolia sp.) and sloumi (Daphniphyllum macropodum) evergreen forest. Terrestrial leeches were identified as Orobdella sp. while unidentified earthworm-feeding Bipalium sp. planaria were also present (specimens in NIBR). Lizards were common on site and the island has an abundant avifauna (Anonymous 2010), both groups likely predators. An Eisenia sp. lumbricid, possibly an introduced species that is to be described elsewhere, was found sympatrically on the island. Behaviour: Rapid ‘snaking’ escape movement when its litter habitat is disturbed. Evidence from a later NIBR survey in 2012 indicates that this worm enters some form of diapause during the coldest winter period.Published as part of Blakemore, Robert J., Park, Tae Seo & Seo, Hong-Yul, 2012, A new Korean earthworm (Oligochaeta: Megadrilacea: Megascolecidae) *, pp. 256-262 in Zootaxa 3368 (1) on pages 256-258, DOI: 10.11646/zootaxa.3368.1.13, http://zenodo.org/record/525250
Flustrellidra armata Grischenko, Seo & Min, 2010, sp. nov.
No full textFlustrellidra armata sp. nov. (Figs 2–4) Diagnosis. Colony erect, branching, bilamellar, arising from an encrusting, unilaminar basal portion, the erect flabellate lobes undulating along their margins, which are lined by kenozooids with conical spines. Autozooids elongate, arranged alternately, with subterminal transversely oval bilabiate orifice; interspersed with small kenozooids with simple, pointed spines, 1–6 along each lateral margin. Mature zooids with one to three similar kenozooids separating maternal and daughter zooids. Large, vicarious kenozooids with long spines scattered throughout colony, their spines tubular, weakly branched. Encrusting basal portion composed of spineless, inflated kenozooids of irregular shape. Type material. Holotype: NIBRIV0000100504, one intact colony, collected 30 August 1996 at rocky shore of Mijo by J. E. Seo, H. J. Kil and J. H. Yoo. Paratype: NIBRIV0000100505, one intact colony, same data as for holotype. Additional material examined. One specimen, intertidal, Mipo, 23 December 1976, collected by J. W. Lee. One specimen, intertidal, Mipo, 10 December 1981, collected by J. E. Seo. One specimen, intertidal, Samcheonpo, 23 September 1984, collected by B. J. Rho, J. H. Park, S. Shin, and J. E. Seo. Twenty-six specimens, intertidal, Mokdo, 11 August 1995, collected by J. E. Seo. Three specimens, intertidal, Mijo, 30 August 1996, collected by J. E. Seo, H. J. Kil and J. H. Yoo. Four specimens, intertidal, Sangju, 30 August 1996, collected by J. E. Seo, J. H. Yoo, and H. J. Kil. Two specimens, intertidal, Cheokdo, 13 June 1999, collected by J. E. Seo. Twenty-two specimens, intertidal, Daechilgido, 13 June 1999, collected by J. E. Seo. Thirty-three specimens, intertidal, Jangji, 18 August 2000, collected by J. E. Seo, S. J. Seo, and Y. H. Gong. One specimen, intertidal, Seosang, 3 November 2002, collected by J. E. Seo. Three specimens, intertidal, Songgo, 18 August 2000, collected by J. E. Seo, S. J. Seo, and Y. H. Gong. Three specimens, depth 10–15 m, rocky bottom, Jisimdo, 17 October 2007, collected by B. S. Min using SCUBA. Seventy-three specimens, depth 10–15 m, rocky bottom, Naedo, 17 October 2007, collected by B. S. Min using SCUBA. Fifty-three specimens, depth 10–15 m, rocky bottom, Oedo, 17 October 2007, collected by B. S. Min using SCUBA. Seventy-five specimens, depth 20 m, rocky bottom, Namyeodo, 19 October 2007, collected by B. S. Min using SCUBA. Etymology. The species name derives from the Latin armatus (protected), referring to the armament of colony provided by numerous kenozooidal spines. Description. Colony erect, branching, flexible, with numerous strap-shaped to flabellate lobes, rounded and undulate at growing margins (Fig. 2 A, B); up to 12.5 cm in height, but usually 6.5–8.5 cm; attached to substratum by encrusting, unilaminar basal plate, up to 1.4 x 2.2 cm in size. Up to 7 closely appressed stalks arranged in parallel planes can arise from single basal plate (Fig. 2 B). Branches of independent trunks mutually interlaced, giving bushy appearance to colony. Young colonies are yellowish, grayish, or pale brown, with whitish zone comprising 3–5 generations of developing zooids on periphery of terminal branches. Mature colonies brownish to flesh-coloured, with dark-brown to reddish fringing zone of marginal kenozooids along entire periphery, except for stalk. Branches slender, 5–17 mm wide, 1.1–1.8 mm thick (without spines). Lobes bilamellar without interposed medullary kenozooidal layer. Zooids oval to rounded-rectangular, elongate, arranged alternately in distinct series. Grooves distinct between young zooids, when not occupied by kenozooids (Fig. 4 A). Frontal surface smooth, inflated, semitransparent, yellowish to brownish, chitinous. Orifice (Fig. 4 B) subterminal, raised, transversely elongate, bilabiate, roughly oval to rectangular in outline, with thickened, chitinous proximal labium, brown in color. Along each lateral zooidal margin are small kenozooids with circular to oval base and a sharp simple spine directed upwards or slightly tilted toward zooid. Young zooids (Fig. 4 A, B) have 1–2 pairs of distal kenozooids, each with a sharp spine pointing upwards, flanking orifice; 1–3 similar kenozooids successively developing more proximally along each lateral margin (Fig. 4 C, D). Zooids in mature colony regions (Fig. 4 E, F) interspersed with single or double series of 4–6 kenozooids each, with parallel or alternating arrangement and with pointed, straight or slightly tilted spines; in addition, there are 1–3 small kenozooids, each with a minute, slightly curved spine, between maternal and daughter zooids. Thus, old zooids can be entirely surrounded by small kenozooids. With age and increasing chitinization, all kenozooidal spines acquire a dark-brown color that contrasts with the zooidal surface. Large vicarious kenozooids scattered throughout colony, these oval, hexagonal, or rhombic in shape with strongly convex frontal surface (Fig. 3 B); occasionally arranged as compact groups in limited areas on colony surface (Fig. 3 A). A hollow, tubular spine (Fig. 3 A–C, F, G), dark brown in color, sharply contrasting with brownish colony surface, originates from center of each vicarious kenozooid. Spines straight to slightly curved in middle, orientated vertically or tilted slightly distally or distolaterally. Majority of spines weakly branching terminally into 2–5 short spurs, without secondary branches; some lack distinct ramifications and have a slightly pointed or blunt tip. Most spines gradually taper from base to tip, but some are enlarged in middle and appear spindle-shaped; others are entirely elongate-cylindrical. Occasionally, a spine narrows moderately in middle and is secondary enlarged near tip, at point of ramification. Bases of large kenozooids flanked by 2–5 minute kenozooids along each lateral margin, each with short, pointed spine directed laterally and upwards. Marginal kenozooids very irregular in shape and size, arranged along entire lateral and terminal margins of branches (Fig. 3 D–F). At terminal end of growing branches, kenozooids fringe the zone of developing zooids (Fig. 3 B). Along margins, kenozooids of opposite layers develop complementarily, side by side (Fig. 3 D), and partly overlap each other; each has a conical spine with pointed tip, oriented 20–80 ° from frontal plane. Encrusting basal plate and stalk of colony (Fig. 4 G, H) composed entirely of inflated kenozooids that are hexagonal, oval, roughly quadrangular, or irregular in shape, with distinct raised boundaries, not intercalated with small, spinous kenozooids. Polypide with 18 tentacles. Measurements. ZL, 0.62–1.03 (0.81 ± 0.09). ZW, 0.32–0.51 (0.39 ± 0.05). OrL, 0.14–0.23 (0.18 ± 0.02). OrW, 0.27–0.35 (0.31 ± 0.02). Kz(s)L, 0.05–0.20 (0.12 ± 0.04). Kz(s)W, 0.04–0.15 (0.09 ± 0.03). Kz(l)L, 0.45–0.83 (0.64 ± 0.12). Kz(l)W, 0.35–0.58 (0.45 ± 0.06). Kz(m)L, 0.22–0.43 (0.31 ± 0.07). Kz(m)W, 0.18– 0.35 (0.27 ± 0.06). Kz(bp)L, 0.37–0.63 (0.51 ± 0.07). Kz(bp)W, 0.26–0.43 (0.33 ± 0.05). Kzs(s)L, 0.13–0.42 (0.25 ± 0.09). Kzs(l)L, 0.67–1.62 (1.19 ± 0.27). Kzs(m)L, 0.30–0.97 (0.53 ± 0.19). Remarks. Flustrellidra armata most resembles its Japanese congener F. stolonifera (Okada, 1921) in having a similar erect, branching, strap-shaped colony form; zooids interspersed by small lateral kenozooids with sharp, simple spines; and very large vicarious kenozooids bearing tubular branching spines. However, F. armata differs from the latter in the following combination of characters: (1) the number of minute, spiny kenozooids separating neighboring zooids along the lateral margins successively increases in F. a r m a t a with age from one or two to five or six, whereas F. stolonifera has only one pair of angular kenozooids flanking the orifice, and rarely one additional pair proximolaterally; (2) the double series of kenozooids between zooids in mature regions of the F. a r m a t a colony is absent in F. stolonifera; (3) the proximal kenozooids that separate maternal and daughter zooids of F. a r m a t a have not been reported in F. stolonifera; (4) branch margins of F. armata are fringed along their whole length with marginal kenozooids having a conical spines, while the margins are edged with spineless zooids in F. stolonifera; (5) spines of the vicarious kenozooids of F. a r m a t a are scarcely branched and only at the very tip, without secondary ramification, whereas the homologous spines in F. stolonifera are divided into two to six tine-like branches (see Okada 1921, text-fig. 1; Mawatari 1953, text-fig. 3). An eastern-Pacific species, F. s p i n i f e r a (O’Donoghue & O’Donoghue, 1923), also forms erect colonies, having strap-shaped bilamellar lobes and large kenozooids with long, sparsely branched spines (holotype specimen illustrated by d’Hondt 1983, pls 1, 2), some of which are superficially similar to those in F. a r m a t a. However, the spine branches are always longer and the ramification is deeper than in the vicarious kenozooidal spines of F. armata. In addition, all kenozooids of F. spinifera are of the same type, located distally to each zooid, whereas in F. a r m a t a large vicarious kenozooids are scattered over the colony surface and small, circular kenozooids with a simple spine are always present. Ecology. The majority of colonies of F. a r m a t a collected intertidally support a diverse association of other sessile benthic forms. Most colonies observed were covered with hydroids, sponges, tubes of sabellid polychaetes, barnacles, ascidians, brachiopods, green and red algae (including articulate coralline algae), and other bryozoans, including species of Lichenopora, Alcyonidium, Cauloramphus, Figularia, Hippothoa, Watersipora, Fenestrulina, Microporella, Pacificincola, Celleporaria, and Celleporina. Among the bryozoans, colonies of Celleporaria were the most frequent and abundant, forming thick nodules around the branch stems of F. a r m a t a. Occasionally, errant polychaetes, pycnogonids, and the shells of juvenile gastropods and oysters were noticed between the appressed branch trunks of colonies. We observed in the field that populations of F. a r m a t a are patchy in the upper subtidal zone but have a high of coverage of substrata on rocky bottoms at depths of 10–20 m at some sites. These deeper colonies likewise provide a habitat for a variety of subtidal benthic organisms. We saw dozens of caprellid and other amphipod crustaceans associated with colonies of F. a r m a t a. The majority of colonies were densely covered by hydroids, green and red algae (both encrusting and articulate coralline algae), sponges, barnacles, tubes of sabellid polychaetes, and other bryozoans, including species of Crisia, Lichenopora, Alcyonidium, Cellaria, Beania, Catenicella, Escharoides, Pacificincola, Celleporaria, and Celleporina. In some cases, we found juvenile mytilids, oysters, decapods, errant polychaetes, and pycnogonids between branches of of F. a r m a t a colonies, and groups of small scleractinians attached to the basal region of colonies. Distribution. Flustrellidra armata is currently known along more than 300 km of the southern shoreline of the Korean Peninsula, facing the western passage of the Korea Strait, between Mipo (35 ° 36 ’ N, 129 ° 27 ’ E) in the northeast and Mokdo (34 ° 10 ’ N, 126 ° 34 ’ E) in the southwest. Accordingly, F. a r m a t a can be categorized as a Pacific-Asian, low-Boreal to Subtropical, intertidal to upper-subtidal species.Published as part of Grischenko, Andrei V., Seo, Ji Eun & Min, Bum Sik, 2010, Flustrellidra armata (Bryozoa: Ctenostomatida) — a new species from the southern shoreline of Korea, pp. 25-35 in Zootaxa 2684 on pages 27-32, DOI: 10.5281/zenodo.19941
NEGATIVE ION PHOTOELECTRON SPECTROSCOPY OF
No full textAuthor Institution: Department of Chemistry, The Johns Hopkins University; Department of Chemistry, The Johns Hopkins University; Department of Chemistry, The Johns Hopkins University; Department of Chemistry, The Johns Hopkins University; Department of Chemistry, The Johns Hopkins UniversityNegative ion photoelectron spectroscopy (NIPES) involves a kinetic energy analysis of electrons which are photodetached when a mass selected beam of negative ions is crossed with a fixed frequency laser beam. The photodetachment spectra of displays transitions from the state of to both the and states of SeO. The singlet-triplet splitting of SeO is readily observable since selection rules regarding spin do not apply in the bound to free state process of photodetachment. The electron affinity of SeO and the negative ion potential parameters of have been determined
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