37,503 research outputs found
The Basu measure as an indicator of conditional conservatism: Evidence from U.K. earnings components
No full textFollowing the work of Basu in 1997, the excess of the sensitivity of accounting earnings to negative share return over its sensitivity to positive share return (the Basu coefficient) has been interpreted as an indicator of conditional accounting conservatism. Although this interpretation is supported by substantial evidence that the Basu coefficient is associated with likely demands for conservatism, concerns have arisen that it may reflect factors not directly related to conservatism, and that this may adversely affect its validity as an indicator of that phenomenon. We argue that evidence on the validity of the Basu coefficient as an indicator of conditional conservatism can be obtained by disaggregating earnings into components, classifying those components by whether or not they are likely to be affected by conditional conservatism, and examining whether the Basu coefficient arises primarily from components likely to be affected by conditional conservatism. We implement this procedure for UK firms reporting under FRS 3: Reporting Financial Performance from 1992 to 2004. Although a substantial proportion of the Basu coefficient emanates from cash flow from operating and investing activities (CFOI), which cannot directly reflect accounting conservatism, its incidence across other components of earnings is predominantly within those components likely to be affected by conditional conservatism. Also, although the bias documented by Patatoukas and Thomas in 2009 is present in all of our aggregate earnings measures, it is heavily concentrated in the CFOI component of earnings and largely absent from components classified as likely to be affected by conditional conservatism. With the important caveat that researchers should test the robustness of their results to the exclusion of the element of the Basu coefficient due to cash flows, our findings are consistent with the conditional conservatism interpretation of the coefficient
Metrocoris deceptor Basu, Polhemus and Subramanian, NEW SPECIES
No full textMetrocoris deceptor Basu, Polhemus and Subramanian, NEW SPECIES Figs. 45–55 Metrocoris quynhi Tran & Zettel 2005: Basu, Subramanian, Valarmathi & Saha, 2015: 98. Material examined. Holotype: Apterous male: INDIA, West Bengal, Darjeeling District, Rishi River, Rishikhola, 27.17357°N, 88.631104°E, 23.III.2013, coll. S. Basu, deposited at the NZC, Zoological Survey of India, H.Q., Kolkata (NZSI) Reg. No. 4643/H15. Paratypes: INDIA, West Bengal: 23 apterous males, 16 apterous females, same data as holotype (NZSI); 1 female, 7 nymphs, Darjeeling District, stagnant pool beside Rishi River, Rishikhola, 27.169677°N, 88.635109°E, 23.III.2013, coll. Srimoyee Basu (NZSI); 5 males, 4 females, 1 nymph, Darjeeling District, Teesta River, Chitre Bridge, 22.III.2013, coll. S. Basu (NZSI); 3 males, 4 females, 3 nymphs, Darjeeling District, Manjukhola, Phuguri tea estate, 26.85575°N, 88.2091°E, 21.III.2013, coll. S. Basu (NZSI); 2 males, 4 females, 11 nymphs, Darjeeling District, Falls near Bunkulung, 26.86776°N, 88.22882°E, 20.III.2013, coll. S. Basu (NZSI); 3 males, 5 females, Darjeeling District, Srikhola, 27.132452°N, 88.076729°E, 4.V.2013, coll. S. Basu (NZSI). Sikkim: 3 apterous males, 4 apterous females, West Sikkim, Martham village, Hee Bermiok, 3.X. 2013, coll. S. Basu (NZSI); INDIA, Himachal Pradesh: 1 male, 3 females, 5 nymphs, Kangra district, Panthend village near Saibaba Mandir, Baijnath, 32.0227°N, 076.38743°E, 3117 ft, 13.09.2014, coll. Dr. K. Valarmathi; 9 males, 9 females, 6 nymphs, Kangra district, Shahpur, Teh, Rajol Road, Rajol River, 32.10350°N, 076.14915°E, 14.09.2014, coll. Dr. K. Valarmathi (NZSI) Reg. No. 4644/H15 to 4651/H15. Discussion: Basu et al. (2015) recorded Metrocoris quynhi Tran & Zettel from India based on specimens taken in Himachal Pradesh and West Bengal, providing a detailed re-description and photographs of the taxon. However, a more critical examination of the specimens involved has revealed that they represent a new species in the Metrocoris anderseni species group. Therefore, the description and figures provided by Basu et al. (2015) depict this new species, which we have named Metrocoris deceptor. Description. See detailed description in Basu et al. (2015) (as Metrocoris quynhi). Only diagnostic characters are repeated here. Size: Male body length 6.10–6.90 mm, maximum body width 2.64–3.0 mm. Female body length 5.30–6.72 mm, maximum body width 3.27–3.40 mm. Measurements of male and female leg segments given in Table 7 and 8. Male foreleg: Fore femur (Fig. 48) strongly incrassate, ratio length/width: 3.22 (2.68/0.83), constricted on apical third, lacking ventral indentation, bearing bifid sub-apical tooth. Fore tibia with inner margin bearing subbasal prominence. Male genitalia: Pygophore (Fig. 51) elongate, narrowed centrally with lateral margins concave, expanded distally, bearing prominently produced anterolateral angles, apex truncate. Proctiger (Fig. 52) elongate, distal portion slender, apex broadly rounded. Paramere (Fig. 53) elongate, projecting laterally far beyond genital segment, strongly bent, basal lobe with prominent angular projection in inner margin, distal arm slender, apex blunt. Etymology. The name “ deceptor ” refers to the fact that this species at first appeared to be a known taxon, but was actually undescribed. Comparative notes. Metrocoris deceptor sp. nov. seems to be most closely related to M. atlas Zettel (2011b), described from two male specimens taken at Alaungdaw Katthapa National Park in Myamnar. Our new species has an elongate male paramere similar to M. atlas, but this structure is more sharply bent forming a nearly right angle (versus an approximate 45° angle as shown in Zettel’s illustration for M. atlas) and lacks the small folding at the apex. As noted by Zettel (2011b), the male pygophore of M. atlas lacks the constriction characteristic of species in the M. anderseni species group, whereas such a constriction is present in M. deceptor, with the apex of the pygophore consequently more enlarged and bearing angular lateral expansions, which are lacking in M. atlas. In regard to the internal male genitalia, the lateral sclerites of the endosoma are larger, longer, and of slightly different shape in M. deceptor in comparison to the figures provided for M. atlas in Zettel (2011b), although the latter are somewhat diagrammatic line drawings in contrast to the photographs provided for these structures in M. deceptor by Basu et al. (2015); thus, such comparisons may not be accurate. The structure of the male fore femur is similar in both species, but both sub-apical teeth are subequal in size in M. deceptor, rather than the distal tooth being obviously larger as in M. atlas. Finally, in regard to coloration, the black markings on the mesonotum are much thicker and more well-developed in M. deceptor, and antennal segment I is dark brown to black except at the extreme base, versus entirely pale except at the extreme apex in M. atlas. Metrocoris deceptor also exhibits many similarities to M. anderseni, described by Chen & Nieser (1993a) from Uttar Pradesh, India. The male paramere in M. anderseni is strongly bent as in M. deceptor, but the ventral margin is far more strongly arcuate, the distal arm is shorter, and the apex expanded to form a small head (see Figs. 72, 73 in Chen & Nieser 1993a). The shape of the ventral sclerite of the endosoma in M. andersoni as depicted by Chen & Nieser (1993a) is also of very different shape from that in M. deceptor. The posterolateral angles of the male pygophore are also more pronounced and angular in M. deceptor than in M. anderseni. Although previously confused with M. quynhi by Basu et al. 2015, the paramere shapes of the two species are very different, with that of M. quynhi being curved upward commencing on the distal one-fourth, while the curvature in M. deceptor commences near the midpoint, such that the upward-directed portion of the distal arm beyond the point of curvature is over twice as long in M. deceptor as in M. quynhi. Other characters separating M. quynhi from M. deceptor include female mediosternite VII, which projects posteriorly beyond the flanking lateral lobes of sternum VI in M. deceptor, rather than being even with them as in M. quynhi; the coloration of the mesonotum in M. deceptor, which has the black markings broader and more pronounced than in M. quynhi; and the coloration of male abdominal tergum VIII, which has a prominent longitudinal pale mark centrally on the posterior half in M. deceptor that is lacking in M. quynhi. Among the remaining species in the M. anderseni species group, M. deceptor is easily separated from M. falcatus Chen & Nieser and M. genitalis Chen & Nieser, by the shape of the male paramere, which is sharply bent centrally rather than distally, and has the distal arm beyond the bend far more elongate than in than in either of these two species.Published as part of Basu, Srimoyee, Polhemus, D. A., Subramanian, K. A., Saha, G. K. & Venkatesan, T., 2016, Metrocoris Mayr (Insecta: Hemiptera: Gerridae) of India with descriptions of five new species, pp. 257-277 in Zootaxa 4178 (2) on pages 267-269, DOI: 10.11646/zootaxa.4178.2.5, http://zenodo.org/record/25873
Deposition and characterisation of sputtered Nickel manganate thin films
No full textThis work investigates the structural and electrical properties of both bulk and r magnetron sputtered thin films of spinel structured Ni(_x)Mn(_3-x)0(_4=8) material system. The distribution of the LDOS of the thin films is also studied using STS. A rf magnetron sputtering system capable of reactive sputtering in a range of argon/oxygen ambients was designed, constructed and commissioned in the first phase of this work. The system was optimised in terms of the effect of various process parameters on the growth rate using factorial experimental design technique. Incident power, substrate to target distance and oxygen percentage in the ambient was found to be the most significant. The effect of different sintering temperatures was investigated for five different compositions of the NhMn3-x04+s material system. Monophase material could not be prepared without prolonged annealing at 800 C after sintering at higher temperatures. This was in contradiction with the published phase diagram of the material and hence a modified scheme was proposed. The lattice parameter of the spinel phase increased with decreasing nickel content. Grain growth was found to be exponentially dependent on the sintering temperature. The R-T characteristics below 300K followed the Shklovskii and Efros VRH model (To -2x10(^5) K) and a change to the NNH model (∆E -330 meV) was observed above 300K. The resistivity of the material was dependent on both the ratio of Ni:Mn and the oxygen stoichiometry (varying from 1.2 Kohm-cm up to 30 Kohm-cm).The as-deposited films showed poor crystallinity, hence post deposition annealing at 800 C was required. The microstructure and the degree of preferred orientation were found to be dependent on the substrate temperature and post deposition annealing. The lattice parameter of the films was lower than the target. The NNH model best described the R-T characteristics of the films deposited at low oxygen content <2.5% (∆E -360 meV) whereas films deposited at higher oxygen content could be better described by the Shklovskii and Efros VRH model {To -2.4 x 10^ K). The resistivity of the films decreased with increasing oxygen in the ambient in the as-deposited state, however after annealing the resistivity of all the films became similar and much lower than the target. The distribution of the LDOS of the films, using STS, was found to be parabolic and in agreement with the assumption in the Shklovskii and Efros VRH model. Additional features were observed in the LDOS with increasing temperatures (~±0.15 eV and ~+1.6 eV) however the changes were completely reversible with temperature
Metrocoris dinendrai Basu, Polhemus and Subramanian, NEW SPECIES
No full textMetrocoris dinendrai Basu, Polhemus and Subramanian, NEW SPECIES Figs. 33–44 Material examined. Holotype: Apterous male: INDIA, West Bengal, Darjeeling District, roadside cascades within Neora Valley National Park, 27.0828°N, 88.7437°E, 2006m. asl, 3.X.2012, coll. S. Basu, deposited at the Zoological Survey of India, H.Q., Kolkata (NZSI) Reg. No. 4774/H15. Paratypes: INDIA, West Bengal: 1 apterous male, 1 apterous female, 31 nymphs: same data as holotype Reg. No. 4775/H15; 2 apterous males, 1 apterous female, 1 macropterous female, 5 nymphs, Darjeeling District, stream on the way to Chengey Falls, near Lava, 27.0511°N, 88.6800°E, 1639 m. asl, 3.X. 2012, coll. S. Basu (NZSI) Reg. No. 4776/H15; 4 apterous males, 2 apterous females, 1 nymph, Darjeeling District, stream near Gorubathan, 26.96636°N, 88.7000°E, 370 m. asl., 1.X.2013, coll. S. Basu, (NZSI) Reg. No. 4777/H15. Description. Apterous male (Holotype): Fig.33 Size: Body length 5.42 mm, maximum width across mesoacetabula 2.53 mm. Colour: Dorsal body coloration yellowish to orange with dorsal black markings (Fig. 33). Interocular dark mark rectangular, bifid posteriorly, anterior margin not connected with dark mark of postclypeus, posterior portion in some individuals connected with dark inner margin of eye. Antennal segments black, with first segment yellow basally. Eyes black. Dark marks on pronotum broad T-shaped, connected to propleural margin (Fig.33). Meso- and metanota pale orange with dark markings as in Figs. 33, sublateral dark stripes broader than yellowish part on apical half, longitudinal dark stripe of mesopleuron extending nearly through its length. Abdominal terga black except segment VIII. Thoracic venter black, with a deep yellowish patch laterally (Fig. 36). Abdominal sterna II– VI black, sterna VII–VIII yellowish posteriorly. Fore femur black, basal one-fourth of ventral and dorsal surfaces yellowish, fore tibia and tarsus black. Rostrum black with pale yellowish lateral margins. Structural characteristics: Head width 1.36, length 0.73. Interocular region wider than eye, widths 0.61 and 0.25 respectively. Eye length 0.62, posterior half of eye covering anterior one fourth of propleuron. Length of antennal segments I–IV: 2.29, 0.97, 0.88, 0.65, first segment longer than combined lengths of remainder. Rostrum length 1.46, surpassing fore trochanter. Pronotum slightly bulbous in male, wider than long, width 1.61, length 0.57, slightly wider than head. Meso- and metanota 1.12 times wider than combined length, width 2.55, length 2.27. Fore femur (Fig. 39) slender and slightly curved at middle, ratio of length/width approximately 6.5, ventral surface with small constriction near middle, without indentation or tooth, with short dense hair fringe ventrally near apex, inner margin with rows of short hairs. Inner margin of fore tibia not modified, bearing rows of short hairs. Second tarsal segment long. Pretarsus with pair of sharp claws. Hind trochanter lacking modifications. Abdominal terga with prominent golden pubescence, combined length 1.83, maximum width 1.21. Abdominal sternum VIII bearing long dense hair fringe (Fig. 37). For measurements of leg segments see Table 1. Male genitalia: Male abdominal sternum VIII (Fig. 37) elongate, sub-oval, length 1.27, width 0.86, densely clothed with fringe of golden hairs. Posterior margin of abdominal tergum VIII straight. Pygophore (Fig. 42) elongate, heavily setiferous, apex truncate. Proctiger (Fig. 41) moderately elongate, lateral margins slightly convex, isolating angular basal lobes, apex broadly rounded, posterior margin with dense hair fringe. Parameres symmetrical (Fig.43) strongly curved near midpoint, apical section expanded to small head with outer margin concave, apex blunt, inner and outer margins with long distinct setae, several whitish dots distributed throughout. Endosomal sclerites as in Fig. 44. Apterous female: Fig. 34 Size: Body length 4.41–4.55, maximum width across mesoacetabula 2.29–2.31. Colour: Pattern of dark markings similar to that of male except much wider and more prominent; fore femur slender, lacking median invaginations; sterna VI–VII yellowish. Structural characteristics: Head length 0.74, width 1.21. Length of antennal segments 1–4: 1.87, 0.65, 0.60, 0.72. Eye length 0.61, width 0.24, interocular width 0.66. Length of rostrum 1.45. Pronotum wider than long, length 0.50, width 1.54. Combined lengths of meso- and metanota 2.12, width 2.21. Fore femur length/width ratio 6.3, lacking medial constriction; fore pretarsi bearing sharp, curved claws; hind trochanter lacking modifications. Abdominal sterna II–VI combined length 0.96, maximum width 1.57. For measurements of leg segments see Table 2. Female terminalia: Abdominal sternum VII semi-circular, length 0.30, width 1.07, slightly constricted laterally, clothed with short golden pubescence. Macropterous male: Unknown. Macropterous female: Fig. 35 Size: Body length 5.32, maximum width across mesoacetabula 2.67. Structural characteristics: Golden brown dorsally, marked with prominent black markings as shown in Fig.35. Median length of pronotum 2.41, humeral width 1.72, length of lateral margin from anterior angle to humerus 0.89, length of lateral margin from humerus to apex 1.76, apex of pronotum pointed, medially slightly bulged. Etymology. This name “dinendra” is a patronym dedicated to Professor Dinendra Roychoudhury of Department of Zoology of University of Calcutta, who had encouraged the first author to carry out entomological research. Habitat. This species was collected from high mountainous cascades within the Neora Valley National Park of the Darjeeling District in West Bengal. The insects were found in steep, rocky areas flooded with splashing water, and appear adapted to the cold waters. A preference for rushing, high gradient upland streams has also been observed by the second author (DP) for another currently undescribed species of the Metrocoris compar species group collected in northern Vietnam, suggesting this habitat association may be typical of the group as a whole. Comparative notes. Metrocoris dinendrai sp. nov. belongs to Metrocoris compar group based on the structure of male fore femur, which is slender and slightly curved; the strongly curved male parameres; the elongate male pygophore which bears dense dark pilosity; and the laterally constricted female terminal abdominal sterna. This new species can be recognized within this group by the distinctive shape of male paramere, which has a a slightly expanded apex that is somewhat concave on its outer margin (Fig. 43); the structure of male endosomal sclerites (Fig. 44); and the female trochanter clothed with thick black bristles. Within the Metrocoris compar group, M. dinendrai seems most similar to M. pardus from the Malay Peninsula (Zettel, 2011a), but has the distal arm of the male paramere more slender and elongate, and the outer margin of the paramere apex concave rather than convex (compare Fig. 43 to Fig. 8 in Zettel, 2011a). The basal lobes on the male proctiger also are more angular than in M. pardus, whereas the internal sclerotization of the male endosoma is similar in both species.Published as part of Basu, Srimoyee, Polhemus, D. A., Subramanian, K. A., Saha, G. K. & Venkatesan, T., 2016, Metrocoris Mayr (Insecta: Hemiptera: Gerridae) of India with descriptions of five new species, pp. 257-277 in Zootaxa 4178 (2) on pages 265-267, DOI: 10.11646/zootaxa.4178.2.5, http://zenodo.org/record/25873
Metrocoris darjeelingensis Basu, Polhemus and Subramanian, NEW SPECIES
No full textMetrocoris darjeelingensis Basu, Polhemus and Subramanian, NEW SPECIES (Figs. 56–67) Material examined. Holotype: Apterous male: INDIA, West Bengal, Darjeeling District, cascades within Neora Valley National Park, 27.0960°N, 88.6098°E, 3.X.2012, coll. S. Basu, deposited at NZC, Zoological Survey of India, H.Q., Kolkata (NZSI) Reg. No. 4652/H15. TABLE ³. Morphological characteristics of males of species of Metrocoris occurring in Inđia. No. Species (Male) Body Length Interocular Marking Pronotum Fore femora Genital segment (mm.) (Abdominal segment VII) Metrocoris murtiensis sp. nov. 4.9 Arrow heađ shapeđ, bifiđ Bulbous Strongly incrassate, with inđentation Long posteriorly anđ a bi-đentate, square shapeđ tooth . Metrocoris malabaricus 5.7 Rectangular, shallowly Not bulbous Slenđer, without inđentation, More or less semi- Thirumalai, 1986 bifiđ anteriorly anđ unarmeđ circular posteriorly . Metrocoris variegans 5.5 Rectangular,shallowly Not bulbous Slenđer, without inđentation, More or less semi- Thirumalai, 1986 bifiđ anteriorly, not unarmeđ circular đistinctly bifiđ posteriorly ……continued on the next page Paratypes: INDIA, West Bengal: 2 apterous males, 1 apterous female, 14 nymphs: same data as holotype (in 70% alcohol); 2 apterous males, 8 apterous females, INDIA, Sikkim, East Sikkim District, Mandakini waterfalls, 26.III.2014, coll. S. Basu (in 70% alcohol, NZSI). Description. Apterous male (Holotype): Fig. 56 Size: Body length: 5.04 mm; body width across mesoacetabula 2.43 mm. Colour: Dorsal body coloration yellowish to orange with distinct black markings. Interocular dark mark on head rectangular, bifid posteriorly, posterior margin connected with dark margin of eye on each side. Basal portions of antennal segments yellow. Rostrum black. Dark mark on pronotum T-shaped with broad arms (Fig. 56). Meso- and metanota with prominent black markings typically as in Fig. 56, lateral yellow portion with median black stripe extending full-length of body. Fore femur mostly black, but yellowish basally. Mid femur yellow with black stripe laterally, mid tibiae and tarsi and hind leg black. Ventrally black with distinct yellow markings on mesothorax. Abdominal terga II–VII blackish dorsally. Abdominal sterna II–VII black and VIII sternum yellow. Structural characteristics: Head length 0.64, width 1.46, which is subequal to pronotum width. Eyes 2.5 times longer than broad, length 0.53, width 0.21. Interocular width 0.67. Length of antennal segments I, II, III, IV = 2.00, 0.77, 0.73, 0.61 respectively, third segment equal to the fourth segment. Rostrum reaching beyond forecoxa, length 1.61. Pronotum slightly bulbous, 2.8 times broader than long. Pronotum length 0.51, width 1.45. Meso- and metanota 1.71 in length and 2.13 in width. Male fore femur (Fig. 59) slender and hairy, dorsally black and ventrally with black median elongated marking, basally yellow, without any modification, but with a slight invagination near middle, ratio of length/width 6.4 (length/width: 2.32/0.34), density of hairs increase apically. Fore tibia without any modification. Mid coxa with few setae. Abdomen length including genital segments 1.82 (along midline), width 0.94 mm. Genital segment 1.16 times longer than broad, covered with dense short hairs, the density of which increases posteriorly. For measurements of leg segments see Table 1. Male genitalia: Segment VIII elongated and with dense pilosity, lateral margins with few long setae (Fig. 61). Length of genital segment (VIII) 0.84 and width 0.72. Pygophore (Fig. 64) prolonged, broad and setiferous. Proctiger (Fig. 65) prolonged, truncated distally, with distinct dark long setae throughout. Parameres (Fig. 67) not visible externally, large, stout, curved distinctly in the middle, twisted medially, then broadened and finally tapering slightly towards the truncated apex and the posterior end, with 2–3 setae near middle and several white dots distributed up to apex. Endosoma (Fig. 66) poorly sclerotised, with dorsal sclerite long, expanded horizontally and recurved proximally; lateral sclerite apically reflexed, almost straight, ventral sclerite long, not extending beyond the dorsal sclerite, concave sub-medially. Apterous female: Fig. 58 Size: Body length 4.54 mm; body width across acetabula 2.49 mm. Colour: Color pattern and markings similar to male. Structural characteristics: Head length 0.73 width 1.34. Length of antennal segments I, II, III, IV = 1.84, 0.64, 0.84, 0.67. Interocular width 0.75. Eye length 0.54, width 0.27. Length of rostrum 1.59. Pronotum 0.47 in length and 1.48 in width. Length of abdomen 1.30, width 1.53. Fore femur slender, elongated, without any modification. Hind coxa with few long setae; hind trochanter with a pointed apex bearing a distinct, tapering tuft of long hairs (Fig. 60). For measurements of leg segments see Table 2. Female terminalia: Abdominal sternum VII (Fig. 62) length 0.61, width 0.79, small, broad and rectangular, hairy, laterally little constricted and with a smooth caudal margin entirely covering rounded genital segments (Fig. 10), laterally convex, hairy dorsally (Fig. 62). Macropterous forms. Unknown Etymology. The specific epithet darjeelingensis is derived from the District of Darjeeling from where it was collected. Habitat. This species was collected from a cascade flowing within the Neora Valley National Park of Darjeeling district. It was also found abundantly in the waterfalls of Sikkim. This species occurs in the turbulent water of mountain streams in both Sikkim and the Darjeeling Himalaya. Comparative notes. Metrocoris darjeelingensis Basu, Polhemus and Subramanian sp. nov. is a member of Metrocoris compar group and is closely related to Metrocoris coxalis Chen & Nieser (1993a) on the basis of the male paramere, which extends beyond the genital segment, has a more expanded and truncate apex, and possesses setae in the twisted middle region (Fig. 67); and by the male fore femur, which has a small but distinct concavity centrally on the ventral margin (Fig. 59). In addition, the female of M. coxalis Chen and Nieser possesses distinctive projections on the hind coxae, which are lacking in M. darjeelingensis, the latter instead possessing distinctive setiferous projections on the hind trochanter (Fig. 60). Chen & Nieser (1993b) state that the ventral coloration in M. coxalis is yellowish with a broad median dark mark between the mesocoxa, and that the male metasternum is pale, whereas in M. darjeelingensis sp. nov. the venter is almost entirely black (Fig. 57) with only limited yellowish markings laterally. Collection of additional material of M. coxalis Chen and Nieser will be required to permit a more detailed comparison with our new Indian species, and may reveal additional differences between them.Published as part of Basu, Srimoyee, Polhemus, D. A., Subramanian, K. A., Saha, G. K. & Venkatesan, T., 2016, Metrocoris Mayr (Insecta: Hemiptera: Gerridae) of India with descriptions of five new species, pp. 257-277 in Zootaxa 4178 (2) on pages 269-273, DOI: 10.11646/zootaxa.4178.2.5, http://zenodo.org/record/25873
Synthesis, characterization of some diorganotin(IV) complexes of Schiff bases derived from a non-protein amino acid. Crystal structures of {HO2CC6H4[N=C(H){C(CH3)CH(CH3)-3-OH]-p} and its di-n-butyltin(IV) complex (nBu2Sn{O2CC6H4[N=C(H){C(CH3)CH(CH3)-3-OH]-p}2)
No full textDiorganotin(IV) complexes R2Sn(LH)2 (R = Me, nBu) and {[nBu2Sn(LH)]2O}2 (LH = 4-[(2Z)-(3-hydroxy-1-methyl-2-
butenylidene)amino]benzoate and 4-[{(E)-1-(2-hydroxyphenyl)methylidene}mino]benzoate) have been reported. The complexes
were characterized by elemental analysis, IR, NMR (1H, 13C, 119Sn) and 119mSn M ̈ ossbauer spectroscopy.
Crystal structures of a ligand {HO2CC6H4[N C(H)}{C(CH3)CH(CH3)-3-OH]-p} and one of its di-n-butyltin(IV) complexes
(nBu2Sn{O2CC6H4[N C(H)}{C(CH3)CH(CH3)-3-OH]-p}2) were determined. The spectroscopic data suggest that R2Sn(LH)2
complexes have skew-trapezoidal bipyramidal structure while {[nBu2Sn(LH)]2O}2 complexes adopt a dimeric tetraorganodistannoxane
structure in the solid state and undergo complex exchange processes in deuterochloroform solution, as
revealed by 119Sn NMR spectroscopy
Machine learning based stochastic dynamic analysis of functionally graded shells
No full textThis paper presents stochastic dynamic characterization of functionally graded shells based on an efficient Support Vector Machine assisted finite element (FE) approach. Different shell geometries such as cylindrical, spherical, elliptical paraboloid and hyperbolic paraboloid are investigated for the stochastic dynamic analysis. Monte Carlo Simulation is carried out in conjunction with the machine learning based FE computational framework for obtaining the complete probabilistic description of the natural frequencies. Here the coupled machine learning based FE model is found to reduce the computational time and cost significantly without compromising the accuracy of results. In the stochastic approach, both individual and compound effect of depth-wise source-uncertainty in material properties of FGM shells are considered taking into account the influences of different critical parameters such as the power-law exponent, temperature, thickness and variation of shell geometries. A moment-independent sensitivity analysis is carried out to enumerate the relative significance of different random input parameters considering depth-wise variation and collectively. The presented numerical results clearly indicate that it is imperative to take into account the relative stochastic deviations (including their probabilistic characterization) of the global dynamic characteristics for different shell geometries to ensure adequate safety and serviceability of the system while having an economical structural design.</p
FIGURE. Orchidaceae from Honduras. A. Stelis poasensis. B. S. megachlamys. C. S. ornata. D. S. platystylis. E. S. quadrifida. F. S. segoviensis. G. Stenotyla lendyana. H. Trichosalpinx blaisdellii. I. Trigonidium egertonianum. J. Triphora debilis. K. T. nitida. L. Vanilla columbiana. M. V. hartii. N. V. insignis. O. V. pompona. P in An Updated Checklist of the Orchidaceae of Honduras
No full textFIGURE. Orchidaceae from Honduras. A. Stelis poasensis. B. S. megachlamys. C. S. ornata. D. S. platystylis. E. S. quadrifida. F. S. segoviensis. G. Stenotyla lendyana. H. Trichosalpinx blaisdellii. I. Trigonidium egertonianum. J. Triphora debilis. K. T. nitida. L. Vanilla columbiana. M. V. hartii. N. V. insignis. O. V. pompona. P. Xylobium elongatum. Photographs by the authors, except J (D. Germer) and K (J. Hernández).Published as part of Vega, Hermes, Cetzal-Ix, William, Mó, Edgar, Romero-Soler, Katya J. & Basu, Saikat K., 2022, An Updated Checklist of the Orchidaceae of Honduras, pp. 1-80 in Phytotaxa 562 (1) on page 23, DOI: 10.11646/phytotaxa.562.1.1, http://zenodo.org/record/707369
Letter from Franklin K. Lane, Secretary of the Interior, to Representative Hayden
No full textLetter from Franklin K. Lane to Carl T. Hayden expressing his support for bill S.390 in establishing the Grand Canyon as a National Park
Measurement of the ratio of branching fractions B(B0→K∗0γ )/B(B0s→φγ ) and the directCP asymmetry inB 0→K∗0γ
No full textThe ratio of branching fractions of the radiative B decays B0→K⁎0γ and B0s→ϕγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of s√=7TeV. The value obtained is
B(B0→K⁎0γ)B(B0s→ϕγ)=1.23±0.06(stat.)±0.04(syst.)±0.10(fs/fd),
where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0→K⁎0γ), the branching fraction B(B0s→ϕγ) is measured to be (3.5±0.4)×10−5.
The direct CP asymmetry in B0→K⁎0γ decays has also been measured with the same data and found to be
ACP(B0→K⁎0γ)=(0.8±1.7(stat.)±0.9(syst.))%.
Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations
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