171,511 research outputs found
Effetti combinati della diffusione Raman stimolata e delle modulazioni di fase nelle fibre ottiche
No full textA lower bound for the Balan--Jiang matrix problem
No full textWe prove the existence of a positive semidefinite matrix such that any decomposition into rank-1 matrices has to have factors
with a large norm, more precisely where is
independent of . This provides a lower bound for the Balan--Jiang matrix
problem. The construction is probabilistic
Combined effects of self-, cross-phase modulation and stimulated Raman scattering in optical fibers
No full textThe combined effects of self- and cross-phase modulation, and stimulated Raman scattering on the development of the signal and pump waves are experimentally observed. Their asymmetrical spectra are explained physically, and studied through numerical integration of the governing equation
Zercon sklari Balan
No full textZercon sklari Balan Zercon sklari Balan, 1992: 26. Zercon sklari.— Karaca & Urhan, 2014: 148. Materials examined. 1 female, soil and litter samples under pine trees (Pinus sp.) and oak trees (Quercus sp.), 41 ° 44 ' N, 27 ° 19 ' E, 370 m, vicinity of Yundalan village Dam, Centre of Kırklareli province, March 2014; 12 females and 5 males, soil, litter and moss samples under oak trees (Quercus sp.), 41 ° 29 ' N, 27 ° 12 ' E, 133 m, vicinity of centre of district, Babaeski district (Kırklareli province), April 2014. Female. Mean length of idiosoma 387 (372–401), mean width 294 (277–309) (n = 10). Dorsum. Twenty pairs of setae present on podonotum: j-row with six pairs, z-row with two pairs, s-row with six pairs and r-row with six pairs. Seta j 1 long and finely barbed, remaining setae on podonotum smooth and needle-like. Twenty pairs of setae present on opisthonotum: J-row with six pairs, Z-row with five pairs, S-row with two pairs and R-row with seven pairs. Setae J 1 –J 3, Z 1 –Z 2, S 1 –S 2 and R 1 –R 7 smooth and needle-like. Seta J 4 finely barbed, J 5 and Z 3 apically pilose, J 6 and Z 4 brush-like and finely barbed, all with hyaline ending. Seta Z 5 short and finely barbed. Except seta J 6, no setae reach beyond opisthonotum. Setae S 3 and S 4 absent. Podonotum covered with irregular tile-like pattern. Anterolateral parts covered with tile-like pattern, anteromedial parts covered with finely punctate pattern as opisthonotum. Dorsal cavities distinct, equal in size, axes parallel to that of the body. Pores. Pore po 1 located on line connecting setae j 2 –s 1, po 2 located on line connecting setae j 5 –s 4 (closer to seta s 4), po 3 inside a line connecting s 5 –s 6. Pore Po 1 above the base of seta Z 1, Po 2 located on line connecting setae Z 1 –S 2 (closer to seta S 2), Po 3 located on line connecting setae J 5 –Z 3 and Po 4 below the base of seta Z 4. Venter. Shapes of ventral shields and peritremes, and chaetotaxy are typical for genus Zercon. Two pairs of setae present on ventral side of podonotum. Setae p 1 short, smooth and needle-like, p 2 long, finely plumose, feather-like with hyaline ending. Peritremes slightly bent. Lateral ends of peritremal shield reaching to seta R 1. Adgenital shields present (with two opening valves). Ventrianal shield with nine pairs of setae. Anterior margin of ventrianal shield with four setae and unpaired postanal seta, all short, smooth and needle-like. Male. Mean length of idiosoma 324 (312–334), mean width 233 (227–239) (n = 5). Dorsal idiosoma, ventral idiosoma, shape of setae on idiosoma, sculpture of podonotum and opisthonotum, size and appearance of dorsal cavities, basically similar to those of female. Distribution. Ukraine (Balan, 1992) and Turkey (Karaca & Urhan, 2014). Remarks. Average lengths of opisthonotal setae and distances between setae within longitudinal rows of females and males specimens: see Table 8. Only a single male specimen of this species was recorded from Edirne province previously. We now record and describe female specimens from Turkey for the first time.Published as part of Karaca, Mehmet & Urhan, Raşit, 2016, Five new species of Zercon C. L. Koch, 1836 (Acari: Zerconidae) from northwestern Turkey, pp. 31-59 in Zootaxa 4127 (1) on page 47, DOI: 10.11646/zootaxa.4127.1.2, http://zenodo.org/record/27176
A evolu??o da balan?a comercial na economia brasileira
No full textThis research had as objective to analyze the behavior and the evolution of the Brazilian Trade Balance about the different economic policies adopted between 1990 and 2010. The methodology starts with the documentary method, predominantly qualitative, and analyzes and interprets the behavior of exports and imports Brazil in the time period. The research presents graphs showing the positive or negative
evolution of the trade balance for each period, with documentary references explaining the behavior of exports and imports, in the face of the Balance of Payments, Foreign Exchange and Inflation and Privatization. In the light of this, it is concluded that the evolution of the Trade Balance had prioritized the stabilization of the economy and consequently affected exports and imports and the Brazilian trade balance. The main reason for this trend is connected to the economic policies adopted by the governments from 1990 to 2010, and it is also remarkable that movements of both domestic and foreign economy altered the balance of the Brazilian Trade Balance.Essa pesquisa teve como objetivo analisar o comportamento e a evolu??o da Balan?a Comercial Brasileira em rela??o ?s diferentes pol?ticas econ?micas adotadas entre 1990 e 2010. A metodologia parte do m?todo documental, predominantemente qualitativa, os dados ser?o analisados e interpretados a partir do comportamento das exporta??es e importa??es brasileiras no per?odo de 1990 a 2010, com exibi??o de gr?ficos para demonstrar a evolu??o positiva ou negativa da balan?a comercial para cada per?odo, com refer?ncias documentais explicando o comportamento das exporta??es e importa??es, diante do Balan?o de Pagamentos, do C?mbio e Infla??o e das Privatiza??es. De acordo com isso, conclui-se que houve evolu??o da Balan?a Comercial diante das pol?ticas econ?micas adotadas pelos governos de 1990 a 2010, priorizando a estabiliza??o da economia e consequentemente afetando as exporta??es e importa??es e o saldo comercial brasileiro, constatando que toda movimenta??o da economia interna e externa afetou o saldo da Balan?a Comercial Brasileira
Millettia pulchra var. munnarensis Balan & Predeep 2017
No full textM. pulchra var. munnarensis Recently, Balan et al. (2017) described another new taxon of Millettia with large and violet flowers, i.e. M. pulchra (Bentham 1852: 248) Kurz (1873: 69) var. munnarensis Balan & Predeep (2017: 97). Millettia pulchra is a complex species widely distributed from Northeast India to Southern China, and includes seven varieties that hardly distinguished from each other (Wei & Pedley 2010, Song et al. 2017). The authors suggested that this new variety is strikingly different from all the other varieties of M. pulchra in having large flowers (2.8 cm long) and pods with 8–10 seeds. It is noted that the holotype and isotypes of this new variety was collected from Munnar, Idukki District, Kerala, South India (S.V. Predeep 20986, Fig. 1: C–D), where is far away from the geographic distribution of all the other varieties of the species (see Map 1 in Balan et al. 2017), but is very near to the type locality of M. pseudoracemosa. In fact, examination of literature and specimens showed that M. pulchra var. munnarensis is quite similar to M. pseudoracemosa in morphology and distribution. Furthermore, when comparing with all the other species of Millettia from India recorded in the literature (Table 1), both M. pseudoracemosa and M. pulchra var. munnarensis cannot be distinguished from M. dura Dunn in various characters, including habit, shape, number and hairiness of leaflets, inflorescence type, size and color of flower, and shape and size of pod (Table 2). Millettia dura was validly published by Dunn (1911), although he just give a simple Latin diagnosis in a key to species. One year later, Dunn (1912) provide a full Latin description and eight collections from Africa, including three gatherings collected by M. T. Dawe (# 452, Fig. 2A; # 459; # 481, Fig. 2B) in 1905 from Toro, western Uganda. Some seeds from one of type localities were sent by M. T. Dawe to Kew Royal Botanic Garden at that time. Based on living plants raised from these seeds at Kew, a beautiful colored drawing was published as tab. 8959 in the Curtis’s Botanical Magazine (Stapf 1923; Fig. 2: C–D). These materials are very important for understanding of this taxon, thus a specimen collected by Dawe with a better preservation, i.e. M. T. Dawe 481 (K000263154), is designated here as the lectotype.Published as part of Song, Zhu-Qiu, 2023, The identities of Millettia pseudoracemosa and M. pulchra var. munnarensis (Fabaceae: Millettieae) from South India, pp. 55-63 in Phytotaxa 591 (1) on page 56, DOI: 10.11646/phytotaxa.591.1.5, http://zenodo.org/record/778427
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
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No full textCCPB000412241-0Marca tip. en port.El pie de imp. consta en colofón "per Stephanum Balan caracteribus mandate. Anno ... M.CCCCCV. die. XVI. Maii"Sign.: a-c8, d6, e-f8, g4, h-z8, [signo]6, [signo]-[signo]8Inic. miniadas en rojo, azul y verd
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
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