Phytosociological Classification of Coastal Vegetation in Korea

2016 ◽  
Vol 34 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Yong Ho Lee ◽  
◽  
Young Ju Oh ◽  
Wook Jae Lee ◽  
Chae Sun Na ◽  
...  
Keyword(s):  
Author(s):  
S. Niculescu ◽  
D. Ienco ◽  
J. Hanganu

Land cover is a fundamental variable for regional planning, as well as for the study and understanding of the environment. This work propose a multi-temporal approach relying on a fusion of radar multi-sensor data and information collected by the latest sensor (Sentinel-1) with a view to obtaining better results than traditional image processing techniques. The Danube Delta is the site for this work. The spatial approach relies on new spatial analysis technologies and methodologies: Deep Learning of multi-temporal Sentinel-1. We propose a deep learning network for image classification which exploits the multi-temporal characteristic of Sentinel-1 data. The model we employ is a Gated Recurrent Unit (GRU) Network, a recurrent neural network that explicitly takes into account the time dimension via a gated mechanism to perform the final prediction. The main quality of the GRU network is its ability to consider only the important part of the information coming from the temporal data discarding the irrelevant information via a forgetting mechanism. We propose to use such network structure to classify a series of images Sentinel-1 (20 Sentinel-1 images acquired between 9.10.2014 and 01.04.2016). The results are compared with results of the classification of Random Forest.


2019 ◽  
Vol 12 (3) ◽  
pp. 1171
Author(s):  
Túlio Vinicius Paes Dantas ◽  
Fabrício Passos Fortes ◽  
Adauto De Souza Ribeiro

A Planície Costeira do Litoral Norte do estado de Sergipe é relativamente bem preservada a despeito do recente aumento da infraestrutura rodoviária e do aumento populacional dos povoamentos, contudo é pouco conhecida quanto a sua diversidade de fisionomias vegetacionais e o real status da conservação das unidades da vegetação. A presente pesquisa objetivou mapear e descrever as fitofisionomias da planície sedimentar quaternária sergipana ao Norte do Rio Sergipe até as margens do Rio São Francisco, por meio da classificação supervisionada de imagens de satélites e visitas de campo. Foram reconhecidas dez fitofisionomias cuja distribuição e estado de conservação são influenciados por características geomorfológicas e pela proximidade dos núcleos de urbanização e atividades econômicas desenvolvidas. Houve o predomínio de vegetações herbáceas, principalmente do Campo Fechado Inundado, que ocupou 21% da área avaliada e é formado por depressões intercordões litorâneos ou do terraço marinho Quaternário, seguindo-se de Campos Entremeados de origem antrópica, utilizados para pastagens ou cultura do coco-da-baía. As formações arbustivas típicas das restingas que originalmente cobririam grande parte da Planície Costeira se concentraram na forma de pequenos fragmentos em regiões mais isoladas, tendo sido a fitofisionomia mais alterada no processo histórico de ocupação. Os fragmentos em melhor estado de conservação podem ser considerados como remanescentes de formações costeiras do estado, porém em todos são evidenciados impactos de atividades humanas diversas. Espera-se que o mapeamento e descrição das fitofisionomias possam ser utilizados como ferramentas para preservação e gestão territorial da região estudada. Mapping and characterization of vegetation physiognomies of the northern coastal Plain of Sergipe State A B S T R A C TThe Coastal Plain of the Northern Seashore of the state of Sergipe is relatively well preserved, despite the recent increase in road infrastructure and population increase of the villages. However it is little known in its diversity of vegetation physiognomies and the real status of the conservation of vegetation units.  The present research had the objective of mapping and describing the phytophysiognomies of the quaternary sedimentary plain of Northern Sergipe, through supervised classification of satellite images. Ten phytophysiognomies were recognized, whose distribution and conservation status are influenced by geomorphological characteristics and the proximity of urbanization centers and the development of economic activities. There was a predominance of herbaceous vegetation, mainly of the Closed Flooded Field, which occupied 21% of the evaluated area and is formed by depressions between coastal sand lines or marine terrace, followed by Interspersed Field of anthropic origin, used for pasture or coconut culture. The shrub formations, that originally covered much of the Coastal Plain, were concentrated in small fragments in more isolated regions, being the most altered phytophysiognomy in the historical process of occupation. The fragments in good state of conservation can be considered as remnants of coastal formations of the State, but in all, the impacts of diverse human activities are evidenced. It is expected that the mapping and description of phytophysiognomies will be used as tools for the preservation and territorial management of the studied region.Key words: Mangrove; Restinga; Coastal vegetation; Habitat suppression; Vegetation classification


1966 ◽  
Vol 24 ◽  
pp. 21-23
Author(s):  
Y. Fujita

We have investigated the spectrograms (dispersion: 8Å/mm) in the photographic infrared region fromλ7500 toλ9000 of some carbon stars obtained by the coudé spectrograph of the 74-inch reflector attached to the Okayama Astrophysical Observatory. The names of the stars investigated are listed in Table 1.


Author(s):  
Gerald Fine ◽  
Azorides R. Morales

For years the separation of carcinoma and sarcoma and the subclassification of sarcomas has been based on the appearance of the tumor cells and their microscopic growth pattern and information derived from certain histochemical and special stains. Although this method of study has produced good agreement among pathologists in the separation of carcinoma from sarcoma, it has given less uniform results in the subclassification of sarcomas. There remain examples of neoplasms of different histogenesis, the classification of which is questionable because of similar cytologic and growth patterns at the light microscopic level; i.e. amelanotic melanoma versus carcinoma and occasionally sarcoma, sarcomas with an epithelial pattern of growth simulating carcinoma, histologically similar mesenchymal tumors of different histogenesis (histiocytoma versus rhabdomyosarcoma, lytic osteogenic sarcoma versus rhabdomyosarcoma), and myxomatous mesenchymal tumors of diverse histogenesis (myxoid rhabdo and liposarcomas, cardiac myxoma, myxoid neurofibroma, etc.)


Author(s):  
Irving Dardick

With the extensive industrial use of asbestos in this century and the long latent period (20-50 years) between exposure and tumor presentation, the incidence of malignant mesothelioma is now increasing. Thus, surgical pathologists are more frequently faced with the dilemma of differentiating mesothelioma from metastatic adenocarcinoma and spindle-cell sarcoma involving serosal surfaces. Electron microscopy is amodality useful in clarifying this problem.In utilizing ultrastructural features in the diagnosis of mesothelioma, it is essential to appreciate that the classification of this tumor reflects a variety of morphologic forms of differing biologic behavior (Table 1). Furthermore, with the variable histology and degree of differentiation in mesotheliomas it might be expected that the ultrastructure of such tumors also reflects a range of cytological features. Such is the case.


Author(s):  
Paul DeCosta ◽  
Kyugon Cho ◽  
Stephen Shemlon ◽  
Heesung Jun ◽  
Stanley M. Dunn

Introduction: The analysis and interpretation of electron micrographs of cells and tissues, often requires the accurate extraction of structural networks, which either provide immediate 2D or 3D information, or from which the desired information can be inferred. The images of these structures contain lines and/or curves whose orientation, lengths, and intersections characterize the overall network.Some examples exist of studies that have been done in the analysis of networks of natural structures. In, Sebok and Roemer determine the complexity of nerve structures in an EM formed slide. Here the number of nodes that exist in the image describes how dense nerve fibers are in a particular region of the skin. Hildith proposes a network structural analysis algorithm for the automatic classification of chromosome spreads (type, relative size and orientation).


Author(s):  
Jacob S. Hanker ◽  
Dale N. Holdren ◽  
Kenneth L. Cohen ◽  
Beverly L. Giammara

Keratitis and conjunctivitis (infections of the cornea or conjunctiva) are ocular infections caused by various bacteria, fungi, viruses or parasites; bacteria, however, are usually prominent. Systemic conditions such as alcoholism, diabetes, debilitating disease, AIDS and immunosuppressive therapy can lead to increased susceptibility but trauma and contact lens use are very important factors. Gram-negative bacteria are most frequently cultured in these situations and Pseudomonas aeruginosa is most usually isolated from culture-positive ulcers of patients using contact lenses. Smears for staining can be obtained with a special swab or spatula and Gram staining frequently guides choice of a therapeutic rinse prior to the report of the culture results upon which specific antibiotic therapy is based. In some cases staining of the direct smear may be diagnostic in situations where the culture will not grow. In these cases different types of stains occasionally assist in guiding therapy.


Author(s):  
S. Arumugam ◽  
Sarasa Bharati Arumugam

Adenoaas of the pituitary are no longer classified based on their tinctorial affinity to dyes. With the advent of the newer methods of sophisticated technology, it is now possible to classify. These depending upon the type of hormone secreted based either on histochemical techniques or on ultrastructural characteristics. The latter provides an insight into the cytoplasmic organelle morphology which offers a delightful feast to the eye as well.This paper presents the ultrastructural characters of the pituitary adenoma as seen in Madras. 171 adenomas (124 males and 47 females) were seen during 1972-1989, classified at the light microscope level as 159 chromophobe, 2 basophilic, 4 eosinophilic and 6 mixed adenomas.Ultrastructural examination showed that the sparsely granular prolactin cell adenoma is the commonest adenoma to be encountered closely followed by the growth hormone cell adenoma, null cell adenoma, the mixed cell adenoma and others.


1997 ◽  
Vol 6 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Wayne O. Olsen ◽  
Terri L. Pratt ◽  
Christopher D. Bauch
Keyword(s):  

Multichannel ABR recordings for 30 otoneurologic patients were reviewed independently by three audiologists to assess interjudge consistency in determining absolute latencies and overall interpretation of ABR results. Four months later, the tracings were reviewed a second time to evaluate intrajudge consistency in interpretation of ABR waveforms. Interjudge agreement in marking latencies for waves I, III, and V within 0.2 ms was on the order of 90% or better. Intrajudge consistency was slightly higher. Only rarely did inter- or intrajudge differences in latency measurements exceed 0.3 ms. Agreement in overall interpretation of ABR results as "normal" or "abnormal" was unanimous for 90% of the patients. Across pairs of judges, the agreement for "normal" and "abnormal" classification of the ABR tracings was 97%. Intrajudge consistency for "normal" and "abnormal" categorization of the ABR results was 100% for one judge, 97% for the other two judges.


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