123 research outputs found
TĂ©rbe zĂĄrt kert = Enclosed garden
The archetype of the enclosed garden is the medieval hortus conclusus, which make the perfect type from the former types. The enclosed gardens of nowadays have developed from the hortus conclusus, which behave like a prism. Peter Zumthor's Serpentine Gallery Pavilion is the best example for the contemporary hortus conclusus. The purpose of our study to make a typological collection about contemporary enclosed gardens. The base of the typology is the borderline of the garden, the wall of the garden. We based the study of borderline to Dom Hans van der Laan's architectural theory and his monastery building in Vaals. We analyze the typology by six contemporary enclosed gardens from the simple wall to the building volume through the volumes of the wall. The openings of the walls can be the next way of our analysis.A bezĂĄrt kertek kiĂ©rlelt archetĂpusa a hortus conclusus, a közĂ©pkori kolostorudvarok kertjei. A hortus conclusus, mint egy prizma összegyƱjti az összes megelĆzĆ bezĂĄrt kert vĂĄltozatot, tökĂ©letes tĂpust hoz lĂ©tre, majd belĆle fejlĆdnek tovĂĄbb napjaink bezĂĄrt kertjeinek vĂ©gtelen variĂĄciĂłi. A hortus conclusus kortĂĄrs beteljesĂŒlĂ©se Peter Zumthor Serpentine Gallery pavilonja. A kutatĂĄsunk cĂ©lja a kortĂĄrs kertek tipolĂłgiai gyƱjtemĂ©nyĂ©nek elkĂ©szĂtĂ©se, melynek alapja a kert hatĂĄra, a kertet hatĂĄrolĂł fal vizsgĂĄlata. A kert hatĂĄrĂĄt Dom Hans van der Laan Ă©pĂtĂ©szetelmĂ©lete Ă©s vaalsi kolostorbĆvĂtĂ©se alapjĂĄn közelĂtettĂŒk meg. A tipolĂłgiĂĄt hat kortĂĄrs bezĂĄrt kert elemzĂ©sĂ©vel mutatjuk be, az egyszerƱ tömör falas bekerĂtett tĂ©rtĆl, a fal teresedĂ©sei ĂĄltal tömeggĂ© vĂĄlt hatĂĄron ĂĄt, amĂg a fal teljesen eltƱnik Ă©s az udvart meghatĂĄrozĂł Ă©pĂŒlettömeg jelenti a hatĂĄrt. A tipolĂłgia tovĂĄbbvitele, amikor a falak alaprajzi Ă©s a falban lĂ©vĆ nyĂlĂĄsok szerinti megnyitĂĄsĂĄt vizsgĂĄljuk
Acute Sets of Exponentially Optimal Size
We present a simple construction of an acute set of size (Formula presented.) in (Formula presented.) for any dimension d. That is, we explicitly give (Formula presented.) points in the d-dimensional Euclidean space with the property that any three points form an acute triangle. It is known that the maximal number of such points is less than (Formula presented.). Our result significantly improves upon a recent construction, due to Dmitriy Zakharov, with size of order (Formula presented.) where (Formula presented.) is the golden ratio. © 2018 Springer Science+Business Media, LLC, part of Springer Natur
How large dimension guarantees a given angle
Abstract We study the following two problems: (1) Given n â„ 2 and α, how large Hausdorff dimension can a compact set A â R n have if A does not contain three points that form an angle α? (2) Given α and ÎŽ, how large Hausdorff dimension can a compact subset A of a Euclidean space have if A does not contain three points that form an angle in the ÎŽ-neighborhood of α? Some angles (0, 60 âą ) turn out to behave differently than other α â [0, 180 âą ]
Deep Learning-based Approach for the Semantic Segmentation of Bright Retinal Damage
Regular screening for the development of diabetic retinopathy is imperative for an early diagnosis and a timely treatment, thus
preventing further progression of the disease. The conventional screening techniques based on manual observation by qualified physicians can
be very time consuming and prone to error. In this paper, a novel automated screening model based on deep learning for the semantic segmentation of exudates in color fundus images is proposed with the implementation of an end-to-end convolutional neural network built upon UNet architecture. This encoder-decoder network is characterized by the
combination of a contracting path and a symmetrical expansive path to
obtain precise localization with the use of context information. The proposed method was validated on E-OPHTHA and DIARETDB1 public
databases achieving promising results compared to current state-of-theart methods.This paper was supported by the European Unionâs Horizon
2020 research and innovation programme under the Project GALAHAD [H2020-ICT2016-2017, 732613]. The work of AdriÂŽan Colomer has been supported by the Spanish
Government under a FPI Grant [BES-2014-067889]. We gratefully acknowledge the
support of NVIDIA Corporation with the donation of the Titan Xp GPU used for this
research.Silva, C.; Colomer, A.; Naranjo Ornedo, V. (2018). Deep Learning-based Approach for the Semantic Segmentation of Bright Retinal Damage. En Intelligent Data Engineering and Automated Learning â IDEAL 2018. Springer. 164-173. https://doi.org/10.1007/978-3-030-03493-1_18S164173World Health Organization: Diabetes fact sheet. Sci. Total Environ. 20, 1â88 (2011)Verma, L., Prakash, G., Tewari, H.K.: Diabetic retinopathy: time for action. No complacency please! Bull. World Health Organ. 80(5), 419â419 (2002)Sopharak, A.: Machine learning approach to automatic exudate detection in retinal images from diabetic patients. J. Mod. Opt. 57(2), 124â135 (2010)Imani, E., Pourreza, H.R.: A novel method for retinal exudate segmentation using signal separation algorithm. Comput. Methods Programs Biomed. 133, 195â205 (2016)Haloi, M., Dandapat, S., Sinha, R.: A Gaussian scale space approach for exudates detection, classification and severity prediction. arXiv preprint arXiv:1505.00737 (2015)Welfer, D., Scharcanski, J., Marinho, D.R.: A coarse-to-fine strategy for automatically detecting exudates in color eye fundus images. Comput. Med. Imaging Graph. 34(3), 228â235 (2010)Harangi, B., Hajdu, A.: Automatic exudate detection by fusing multiple active contours and regionwise classification. Comput. Biol. Med. 54, 156â171 (2014)Sopharak, A., Uyyanonvara, B., Barman, S.: Automatic exudate detection from non-dilated diabetic retinopathy retinal images using fuzzy C-means clustering. Sensors 9(3), 2148â2161 (2009)Havaei, M., Davy, A., Warde-Farley, D.: Brain tumor segmentation with deep neural networks. Med. Image Anal. 35, 18â31 (2017)Liskowski, P., Krawiec, K.: Segmenting retinal blood vessels with deep neural networks. IEEE Trans. Med. Imag. 35(11), 2369â2380 (2016)Pratt, H., Coenen, F., Broadbent, D.M., Harding, S.P.: Convolutional neural networks for diabetic retinopathy. Procedia Comput. Sci. 90, 200â205 (2016)Gulshan, V., Peng, L., Coram, M.: Development and validation of a deep learning algorithm for detection of diabetic retinopathy in retinal fundus photographs. JAMA 316(22), 2402â2410 (2016)PrentaĆĄiÄ, P., LonÄariÄ, S.: Detection of exudates in fundus photographs using deep neural networks and anatomical landmark detection fusion. Comput. Methods Programs Biomed. 137, 281â292 (2016)Ronneberger, O., Fischer, P., Brox, T.: U-Net: convolutional networks for biomedical image segmentation. In: Navab, N., Hornegger, J., Wells, W.M., Frangi, A.F. (eds.) MICCAI 2015. LNCS, vol. 9351, pp. 234â241. Springer, Cham (2015). https://doi.org/10.1007/978-3-319-24574-4_28Garcia-Garcia, A., Orts-Escolano, S., Oprea, S., Villena-Martinez, V., Garcia-Rodriguez, J.: A review on deep learning techniques applied to semantic segmentation, pp. 1â23. arXiv preprint arXiv:1704.06857 (2017)Deng, Z., Fan, H., Xie, F., Cui, Y., Liu, J.: Segmentation of dermoscopy images based on fully convolutional neural network. In: IEEE International Conference on Image Processing (ICIP 2017), pp. 1732â1736. IEEE (2017)Long, J., Shelhamer, E., Darrell, T.: Fully convolutional networks for semantic segmentation. In: Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, pp. 3431â3440. IEEE (2014)Li, W., Qian, X., Ji, J.: Noise-tolerant deep learning for histopathological image segmentation, vol. 510 (2017)Chen, H., Qi, X., Yu, L.: DCAN: deep contour-aware networks for object instance segmentation from histology images. Med. Image Anal. 36, 135â146 (2017)Walter, T., Klein, J.C., Massin, P., Erginay, A.: A contribution of image processing to the diagnosis of diabetic retinopathy-detection of exudates in color fundus images of the human retina. IEEE Trans. Med. Imaging 21(10), 1236â1243 (2002)Morales, S., Naranjo, V., Angulo, U., Alcaniz, M.: Automatic detection of optic disc based on PCA and mathematical morphology. IEEE Trans. Med. Imaging 32(4), 786â796 (2013)Zhang, X., Thibault, G., DecenciĂšre, E.: Exudate detection in color retinal images for mass screening of diabetic retinopathy. Med. Image Anal. 18(7), 1026â1043 (2014
A unique Valanginian paleoenvironment at an iron ore deposit near ZengĆvĂĄrkony (Mecsek Mts, South Hungary), and a possible genetic model
Abstract
The spatially restricted Early Valanginian iron ore (limonite) and manganese deposit at ZengĂ”vĂĄrkony (Mecsek Mts, southern Hungary) contains a rich, strongly limonitized, remarkably large-sized (specimens are 30â70% larger than those at their type localities) brachiopod-dominated (mainly Lacunosella and Nucleata) megafauna and a diverse crustacean microfauna, which indicates a shallow, nutrient-rich environment possibly linked to an uplifted block, and/or a hydrothermal vent
Origin and ascent history of unusually crystal-rich alkaline basaltic magmas from the western Pannonian Basin
The last eruptions of the monogenetic Bakony-Balaton Highland Volcanic Field
(western Pannonian Basin, Hungary) produced unusually crystal- and xenolith-rich
alkaline basalts which are unique among the alkaline basalts of the Carpathian-
Pannonian Region. Similar alkaline basalts are only rarely known in other volcanic
fields of the world. These special basaltic magmas fed the eruptions of two closely
located volcanic centres: the BondorĂł-hegy and the FĂŒzes-tĂł scoria cone. Their
uncommon enrichment in diverse crystals produced unique rock textures and modified
original magma compositions (13.1-14.2 wt.% MgO, 459-657 ppm Cr, 455-564 ppm Ni
contents).
Detailed mineral-scale textural and chemical analyses revealed that the BondorĂł-hegy
and FĂŒzes-tĂł alkaline basaltic magmas have a complex ascent history, and that most
of their minerals (~30 vol.% of the rocks) represent foreign crystals derived from
different levels of the underlying lithosphere. The most abundant xenocrysts, olivine,
orthopyroxene, clinopyroxene and spinel, were incorporated from different regions and
rock types of the subcontinental lithospheric mantle. Megacrysts of clinopyroxene and
spinel could have originated from pegmatitic veins / sills which probably represent
magmas crystallized near the crust-mantle boundary. Green clinopyroxene xenocrysts
could have been derived from lower crustal mafic granulites. Minerals that crystallized
in situ from the alkaline basaltic melts (olivine with Cr-spinel inclusions, clinopyroxene,
plagioclase, Fe-Ti oxides) are only represented by microphenocrysts and overgrowths
on the foreign crystals. The vast amount of peridotitic (most common) and mafic
granulitic materials indicates a highly effective interaction between the ascending
magmas and wall rocks at lithospheric mantle and lower crustal levels. However,
fragments from the middle and upper crust are absent from the studied basalts,
suggesting a change in the style (and possibly rate) of magma ascent in the crust.
These xenocryst- and xenolith-rich basalts yield divers tools for estimating magma
ascent rate that is important for hazard forecasting in monogenetic volcanic fields.
According to the estimated ascent rates, the BondorĂł-hegy and FĂŒzes-tĂł alkaline
basaltic magmas could have reached the surface within hours to few days, similarly to
the estimates for other eruptive centres in the Pannonian Basin which were fed by
"normal" (crystal- and xenolith-poor) alkaline basalts
Investigating International Time Trends in the Incidence and Prevalence of Atopic Eczema 1990-2010: A Systematic Review of Epidemiological Studies
The prevalence of atopic eczema has been found to have increased greatly in some parts of the world. Building on a systematic review of global disease trends in asthma, our objective was to study trends in incidence and prevalence of atopic eczema. Disease trends are important for health service planning and for generating hypotheses regarding the aetiology of chronic disorders. We conducted a systematic search for high quality reports of cohort, repeated cross-sectional and routine healthcare database-based studies in seven electronic databases. Studies were required to report on at least two measures of the incidence and/or prevalence of atopic eczema between 1990 and 2010 and needed to use comparable methods at all assessment points. We retrieved 2,464 citations, from which we included 69 reports. Assessing global trends was complicated by the use of a range of outcome measures across studies and possible changes in diagnostic criteria over time. Notwithstanding these difficulties, there was evidence suggesting that the prevalence of atopic eczema was increasing in Africa, eastern Asia, western Europe and parts of northern Europe (i.e. the UK). No clear trends were identified in other regions. There was inadequate study coverage worldwide, particularly for repeated measures of atopic eczema incidence. Further epidemiological work is needed to investigate trends in what is now one of the most common long-term disorders globally. A range of relevant measures of incidence and prevalence, careful use of definitions and description of diagnostic criteria, improved study design, more comprehensive reporting and appropriate interpretation of these data are all essential to ensure that this important field of epidemiological enquiry progresses in a scientifically robust manner
Familial hypercholesterolaemia in children and adolescents from 48 countries: a cross-sectional study
Background Approximately 450â000 children are born with familial hypercholesterolaemia worldwide every year, yet only 2·1% of adults with familial hypercholesterolaemia were diagnosed before age 18 years via current diagnostic approaches, which are derived from observations in adults. We aimed to characterise children and adolescents with heterozygous familial hypercholesterolaemia (HeFH) and understand current approaches to the identification and management of familial hypercholesterolaemia to inform future public health strategies. Methods For this cross-sectional study, we assessed children and adolescents younger than 18 years with a clinical or genetic diagnosis of HeFH at the time of entry into the Familial Hypercholesterolaemia Studies Collaboration (FHSC) registry between Oct 1, 2015, and Jan 31, 2021. Data in the registry were collected from 55 regional or national registries in 48 countries. Diagnoses relying on self-reported history of familial hypercholesterolaemia and suspected secondary hypercholesterolaemia were excluded from the registry; people with untreated LDL cholesterol (LDL-C) of at least 13·0 mmol/L were excluded from this study. Data were assessed overall and by WHO region, World Bank country income status, age, diagnostic criteria, and index-case status. The main outcome of this study was to assess current identification and management of children and adolescents with familial hypercholesterolaemia. Findings Of 63â093 individuals in the FHSC registry, 11â848 (18·8%) were children or adolescents younger than 18 years with HeFH and were included in this study; 5756 (50·2%) of 11â476 included individuals were female and 5720 (49·8%) were male. Sex data were missing for 372 (3·1%) of 11â848 individuals. Median age at registry entry was 9·6 years (IQR 5·8â13·2). 10â099 (89·9%) of 11â235 included individuals had a final genetically confirmed diagnosis of familial hypercholesterolaemia and 1136 (10·1%) had a clinical diagnosis. Genetically confirmed diagnosis data or clinical diagnosis data were missing for 613 (5·2%) of 11â848 individuals. Genetic diagnosis was more common in children and adolescents from high-income countries (9427 [92·4%] of 10â202) than in children and adolescents from non-high-income countries (199 [48·0%] of 415). 3414 (31·6%) of 10â804 children or adolescents were index cases. Familial-hypercholesterolaemia-related physical signs, cardiovascular risk factors, and cardiovascular disease were uncommon, but were more common in non-high-income countries. 7557 (72·4%) of 10â428 included children or adolescents were not taking lipid-lowering medication (LLM) and had a median LDL-C of 5·00 mmol/L (IQR 4·05â6·08). Compared with genetic diagnosis, the use of unadapted clinical criteria intended for use in adults and reliant on more extreme phenotypes could result in 50â75% of children and adolescents with familial hypercholesterolaemia not being identified. Interpretation Clinical characteristics observed in adults with familial hypercholesterolaemia are uncommon in children and adolescents with familial hypercholesterolaemia, hence detection in this age group relies on measurement of LDL-C and genetic confirmation. Where genetic testing is unavailable, increased availability and use of LDL-C measurements in the first few years of life could help reduce the current gap between prevalence and detection, enabling increased use of combination LLM to reach recommended LDL-C targets early in life. Funding Pfizer, Amgen, Merck Sharp & Dohme, SanofiâAventis, Daiichi Sankyo, and Regeneron
Noble gas and carbon isotope systematics at the seemingly inactive Ciomadul volcano (EasternâCentral Europe, Romania): evidence for volcanic degassing
Ciomadul is the youngest volcano in the Carpathian-Pannonian Region, Eastern-Central Europe, which last erupted 30 ka. This volcano is considered to be inactive, however, combined evidence from petrologic and magnetotelluric data, as well as seismic tomography studies suggest the existence of a subvolcanic crystal mush with variable melt content. The volcanic area is characterized by high CO2 gas output rate, with a minimum of 8.7 Ă 103 t yr-1. We investigated 31 gas emissions at Ciomadul to constrain the origin of the volatiles. The ÎŽ13C-CO2 and 3He/4He compositions suggest the outgassing of a significant component of mantle-derived fluids. The He isotope signature in the outgassing fluids (up to 3.10 Ra) is lower than the values in the peridotite xenoliths of the nearby alkaline basalt volcanic field (R/Ra 5.95Ra±0.01) which are representative of a continental lithospheric mantle and significantly lower than MORB values. Considering the chemical characteristics of the Ciomadul dacite, including trace element and Sr- Nd and O isotope compositions, an upper crustal contamination is less probable, whereas the primary magmas could have been derived from an enriched mantle source. The low He isotopic ratios could indicate a strongly metasomatized mantle lithosphere. This could be due to infiltration of subduction-related fluids and postmetasomatic ingrowth of radiogenic He. The metasomatic fluids are inferred to have contained subducted carbonate material resulting in a heavier carbon isotope composition (13C is in the range of -1.4 to -4.6 â°) and an increase of CO2/3He ratio. Our study shows the magmatic contribution to the emitted gases
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