197,518 research outputs found
Begonia dalaiensis B. Das, J. Saikia & D. Banik OP 2022, sp. nov.
No full textBegonia dalaiensis B. Das, J. Saikia & D. Banik sp. nov. (Fig. 1, 2) Type: — INDIA. Arunachal Pradesh, Anjaw District, towards Chaglagam, near Meepani bridge, 28°15’53.6’’N, 96°34’28.95’’E, elevation 1335 m, 25 March 2022, Bikas Das, Jadumoni Saikia & Dipanwita Banik CSIR-NEIST 0205, (Holotype: CAL, Isotype: ASSAM, CSIR-NEIST) Diagnosis: —The species in its vegetative form shows greatest similarities with the widely distributed B. acetosella, B. longifolia and B. roxburghii due to its erect nature, caulescent habit and baccate ovary. The new species differs from B. acetosella based on male inflorescence with 12–16 flowers, 3-locular ovary and 2 styles (vs. 3–5 flowers in male inflorescence, 4-locular ovary with 4 styles); from B. longifolia in having a dioecious sexual system and 2 styles (vs. monoecious sexual system and 3 styles); and from B. roxburghii in having a 3-locular ovary with 3-horns, possessing 2 styles (vs. 4-locular ovary with 4 horn like projections bearing 4 styles). Dioecious, caulescent erect herb, perennial, up to 80 cm tall. Rhizome 5–8 cm. Stem branched, erect, slender, green with red tint and white spots, ridged, glabrous, internodes 5–20 cm long, 3–6 cm thick at node. Stipules thick, triangularovate, apex acuminate, glabrous, 1–1.5 × ca. 0.5 cm. Petiole green, ridged like the stem, glabrous, 4.5–9.5 cm long. Leaf blade ovate-lanceolate, 10–18 × 6–10 cm, asymmetric, venation palmate, basifixed, base slightly overlapping to non-overlapping, cordate-oblique, apex acute-acuminate, margin entire, green above, pale green underneath, glabrous on both surfaces. Inflorescence cymose, axillary, peduncle highly reduced, 12– 16 male flowers and 3– 9 female flowers per inflorescence. Bracts greenish-brown, lanceolate-linear, glabrous, nerved, apex acuminate, base truncate, 10–11 × ca. 7 mm, caducous. Staminate flower pedicel glabrous, white to pale pink, 18–25 mm long; corolla ca. 3 cm across, tepals 4 (2+2), white to pink, glabrous, fleshy; outer tepals 2, ovate-elliptic, concave, white-pinkish white, veins somewhat distinct, margin entire, apex rounded-cordate or somewhat erose, 1.4–1.5 × 1.2–1.3 cm; inner tepals 2, glabrous, white to pink, elliptic, margin entire, apex rounded, ca. 1.4 × 1 cm; androecium cylindrical, ca. 10 × 11 mm, stamens 60–90, 5–6 mm long; anther oblong, yellow, 2–2.5 mm, connective extended at apex, apex acuminate, dehisces through lateral longitudinal slits. Pistillate flower pedicel glabrous, 18–22 mm, white-pink, corolla fleshy, 2.8–3 × 2–2.5 cm across; tepals 5, white, unequal, 1–1.7 × 0.6–0.8 cm, oblong to obovate, glabrous, shiny, veins distinct, margin entire, apex rounded, erose; styles 2, free, yellow-white, 0.5–0.8 cm, stigmatic surface twisted; ovary baccate, tri-locular, glabrous, green, tri-horned, placentation axile, placentae bifid, ca. 13 × 7 mm. Fruits not seen. Etymology:— The specific epithet is named after the type locality “Dalai Valley” of Anjaw district, known for its great floristic wealth. Distribution and ecology:— The species shares its habitat with Impatiens sp., Elatostema sp., Melastoma sp., Polygonum sp. and some ferns. It grows along moist shady mountain slopes near streams as well as in forest understory and roadside (Fig. 2). Phenology:— Flowering during March-April. Specimens examined: INDIA. Arunachal Pradesh: Anjaw district, near Meepani bridge, 1335 m, 24 March 2022, B. Das, J. Saikia, D. Banik (CSIR-NEIST 0215) fls.; Lohit district, Hayuliang road, 27°56’00.7”N, 96°21’18.7”E, 1680 m, 06 August 2022, B. Das, J. Saikia, D. Banik (CSIR-NEIST 0210). Conservation status:— Begonia dalaiensis is currently known from two districts of Arunachal Pradesh. Four populations were discovered comprising a total of less than 200 individuals. Based on GeoCAT analysis (Bachman et al., 2011), the species has an extent of occurrence of 38 sq. km area and area of occupancy of 16 sq. km. However the populations are in an almost linear configuration in the montane forest area which greatly reduces the EOO. In addition there is a chance that additional populations could occur in the nearby areas with similar habitats. The data from our initial field survey needs adding to before we are confident in assigning a threat category to B. dalaiensis. Hence, according to the IUCN Standards and Petitions Committee (2022), we provisionally assign B. dalaiensis to the Data Deficient category (DD). Notes:— Begonia dalaiensis belongs to B. sect. Platycentrum based on having a rhizomatous habit, extended anther connectives, 3-locular ovary and convolute stigma; the sectional placement is supported by the molecular phylogeny. The species shows close affinities with the Himalayan species of the former section Sphenanthera, which are mostly comprised of dioecious Begonia with baccate fruits. B. giganticaulis is another dioecious species reported from southern Xizang, China, which shows close affinities with the new species, but differs in attaining a height up to 4 m and in having shortly crested ovary and flowering during June-October whereas B. dalaiensis from Arunachal Pradesh, India grows to approximately 80 cm, has a horned ovary, and flowers in March-April. The differences among these taxa are summarised in Table 2. Phylogenetic position:— The final dataset comprised 408 bases including gaps, with 263 conserved, 66 variable and 79 parsimony informative sites, respectively. The phylogram obtained from Maximum parsimony analysis and Bayesian analysis showed identical tree topology (Fig. 3). The three accessions of the new species formed a clade (BI = 1.00, BS = 96.54%), sister to a clade of the morphologically similar dioecious taxa B. giganticaulis, B. acetosella var. acetosella and B. acetosella var. hirtifolia Irmsch. All species sampled resolved as monophyletic.Published as part of Das, Bikas, Saikia, Jadumoni, Konwar, Parthapratim, Siga, Appu & Banik, Dipanwita, 2022, A new dioecious species of Begonia (Begoniaceae) from Arunachal Pradesh, India, pp. 89-96 in Phytotaxa 575 (1) on pages 91-94, DOI: 10.11646/phytotaxa.575.1.6, http://zenodo.org/record/740333
Notes on identity of some Indian species of Agapetes (Ericaceae)
No full textAgapetes variegata (Roxb.) D. Don ex G. Don var. bhareliana Airy Shaw is treated here as a separate species; A. bhareliana
(Airy Shaw) D. Banik & M. Sanjappa. Resurrected A. macrantha (Hook.) Hook. f., earlier treated as a variety under A. variegata
(Roxb.) D. Don ex G. Don as A. variegata var. macrantha (Hook. f.) Airy Shaw. Two new combinations A. macrantha var.
grandiflora (Hook.f.) Q.Banik & M.Sanjappa and A. macrantha var. oblanceolata (Airy Shaw) D. Banik & M. Sanjappa are
proposed here. A. macrantha var. macrantha and A. macrantha var. oblanceolata are reported for the first time from India
Cell wall degrading enzymes in barley
No full textMaria Hrmova, Andrew J. Harvey, Robert C. Lee, Mitali Banik, Jose N. Varghese and Geoffrey B. Finche
RBECA: A regularized Bi-partitioned entropy component analysis for human face recognition
No full textThis paper presents a novel approach for Human Face Recognition, namely Regularized Bi-partitioned Entropy Component Analysis (RBECA). This conservative approach regularizes the kernel entropy components by deterring the noise and affecting the lower entropy regions area, making the method robust to noise. The kernel feature space, formed by the kernel entropy component analysis (KECA), is divided into two partitions: the High Entropy Space (HES) and the Low Entropy Space (LES). The noise-laden low entropy spectrum is regularized by predicting entropy values obtained from the information-filled High Entropy Spectrum. The corresponding projection vectors are adjusted accordingly. A null space, comprising the negligible information and many dimensions, is eliminated using a Golden Search minimization function at two stages. The method retains the maximum entropy property and high recognition accuracy while using the optimum number of features. This resultant feature vector is classified using the cosine similarity measure. The algorithm is successfully tested on several benchmark databases like AR, FERET, FRAV2D, and LFW, using standard protocols and compared with other competitive methods. The proposed method achieves much better recognition accuracy than other well-known methods like PCA, ICA, KPCA, KECA, LGBP, ERE, etc., in all considered cases. Moreover, we have also proposed a CNN for the comparative analysis. For unbiased or fair performance evaluation, the sensitivity and specificity are also reported
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Multi-layer neural network classification of tongue movement ear pressure signal for human machine interface
No full textVernacular Ukrainian names of mammals in V. F. Nikolaiev’s book “Materials to the Ukrainian Scientific Terminology” (1918)
No full textThe data on the legacy of V. F. Nikolaev, a celebrated Ukrainian naturalist and Head of Poltava Natural History and Historical Museum in 1916–1923 are summarized. The book ‘Materials to the Ukrainian scientific terminology’ published in 1918 was among the most important achievements of V. F. Nikolaiev. He managed to produce an early synthesis of Ukrainian zoological nomenclature based on materials borrowed from available lexicographical sources and using the vernacular names collected by questionnaires mainly in Left-Bank Dnipro Region. Here we reproduced a part of V. F. Nikolaiev’s book, namely the dictionary of the names of mammals, in total, 152 records on 145 taxa (mainly species and genera) of mammals of Ukrainian and world fauna. The names are given in the following order: Russian — Latin (if applicable) — Ukrainian (with synonyms) — source. The collection of names by V. F. Nikolaiev may be considered as a key work in the history of Ukrainian zoological nomenclature and an important source for the selection of names for yet unnamed taxa using synonyms and names which are now out of use for referring other groups of mammals
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