scholarly journals Caracterização morfométrica da Bacia Hidrográfica do rio Real pelo uso de dados SRTM e tecnologias SIG

2020 ◽  
Vol 13 (07) ◽  
pp. 3554
Author(s):  
Dayane Oliveira Santos Melo ◽  
Leandro De Santana Santos ◽  
Alan De Gois Barbosa ◽  
Ludmilson Abritta Mendes
Keyword(s):  
River Mouth ◽  
Low Flow ◽  
Morphometric Study ◽  
Future Research ◽  
Main River ◽  
Satisfactory Precision ◽  
Flow Speeds ◽  
Drainage Capacity ◽  
Morphometric Characterization

O conhecimento das variáveis hidrológicas é imprescindível para a gestão adequada dos recursos hídricos. Dentre essas variáveis, as características morfométricas de uma bacia desempenham um papel importante quando se trata de avaliar seu comportamento hidrológico. Visando preencher o gap acerca de informações a respeito de pequenas bacias hidrográficas, o presente trabalho objetiva realizar a delimitação automática da bacia hidrográfica do rio Real, localizada nos estados de Sergipe e Bahia, com o uso da ferramenta de delimitação GrassGis 7.6.1 e apresentar as principais variáveis morfométricas da bacia obtidas pelo software QGIS. A bacia possui uma área de drenagem de 4.808,16 km², perímetro de 595,60 km e rio principal com 278,39 km. Verificou-se que a delimitação automática com o GrassGis apresentou precisão satisfatória ao comparar com dados oficiais. A forma alongada da bacia induz a baixo potencial para ocorrência de inundações, principalmente nas regiões próximos da foz, e sua rede de drenagem possui capacidade mediana de drenagem e baixas velocidades de escoamento devido a sinuosidade dos rios, indicando maiores tempos de concentração. Além disso foi constatado que a bacia apresenta poucas variações altimétricas, indicando um relevo plano com declividades majoritariamente entre 0 e 2% apontando baixa suscetibilidade a erosão. Espera-se que este estudo auxilie em pesquisas futuras nessa área, além de apoiar a modelagem, planejamento e gerenciamento dos recursos hídricos nessa bacia hidrográfica. Morphometric characterization of the Real River Basin using SRTM data and GIS technologies A B S T R A C TMorphometric characteristics of a watershed are essential for assessment of its hydrological behavior. In order to fill the gap regarding information about Brazilian’s hydrographic basins, mainly in Northeast region, this work aims to present a morphometric study about Real River watershed using the GrassGis 7.6.1 automatic delimitation tool and present the morphometric indicators obtained on the QGIS platform 3.4.11. Located in the states of Sergipe and Bahia, the basin has a drainage area of 4,808.16 km², a perimeter of 595.60 km and a main river with 278.39 km. It was noted that the use of SRTM_90m data for automatic delimitation with GrassGis have a satisfactory precision when compared to official data. The elongated shape of the basin induces low potential for flooding, especially in the regions close to the river mouth, and its drainage network has a medium drainage capacity, with low flow speeds due to the winding rivers, leading to longer concentration times. In addition, it was found that the watershed has little altimetric variation, indicating a flat relief, with slopes mostly between 0 and 3%, that indicates low susceptibility to erosion. This study is expected to assist in future research in this area, in addition to supporting the modeling, planning and management of water resources in this watershed.Keywords: Hydrology, Morphometry, QGIS, GrassGIS.

scholarly journals Phenotypic and Morphometric characterization of indigenous chickens at Jhenaigati upazila of Sherpur district in Bangladesh

2015 ◽  
Vol 12 (2) ◽  
pp. 154-169 ◽  
Author(s):  
F Tabassum ◽  
MA Hoque ◽  
F Islam ◽  
CH Ritchil ◽  
MO Faruque ◽  
...  
Keyword(s):  
Body Weight ◽  
Future Research ◽  
Morphometric Traits ◽  
Indigenous Chicken ◽  
Important Indicator ◽  
Indigenous Chickens ◽  
Affect Body Weight ◽  
Morphometric Characterization

The study was conducted at Rangtia, Shalchura and Dudhnoi villages under Jhenigati upazilla of Sherpur district in Bangladesh for phenotypic and morphometric characterization of indigenous chickens. Among three types of indigenous chickens, Non-descript Deshi were prominent (86%), compared to Cap Headed (10%) and Naked Neck (4%) and the overall mean body weight, back length, body circumference and pelvis width were 961.50 ± 17.79 gm, 152.70 ± 1.29 mm, 219.20 ± 1.89 mm and 25.57 ± .62 mm respectively. The prominent colors of plumage, shank, skin, earlobe and eggshell were multiple (24%), white (52%), white (89%), white & red (47%) and white (48%), respectively while 99% chicken’s had single comb. The highest correlation (0.70) was observed between body weight & body circumference followed by (0.36) between body weight & back length and (0.27) between body weight & pelvis width while eggshell color was significantly correlated with body weight (-0.48), body circumference (-0.41) and pelvis width (-0.26). However, comb type was significantly (p<0.05) affected body weight and pelvis width. But bird type had significant (p<0.05) effect on pelvis width only. Present study reveals that variations in some phenotypic characteristics have significant influence on the pelvis width and body weight while a little change in some morphometric traits may affect body weight of indigenous chickens in Bangladesh which may serve as important indicator trait(s) for future research on the conservation and development of indigenous chicken ecotypes in- situ. DOI: http://dx.doi.org/10.3329/sja.v12i2.21927 SAARC J. Agri., 12(2): 154-169 (2014)

scholarly journals Assessment of digital elevation models to obtain morphometric characteristics in relief transition region

2019 ◽  
Vol 14 (1) ◽  
pp. 1
Author(s):  
Kevin Nunes Ficher ◽  
Donizete Dos Reis Pereira ◽  
Josiane Silva Oliveira ◽  
André Quintão de Almeida ◽  
Eduardo Morgan Uliana
Keyword(s):  
Digital Elevation Models ◽  
Original Data ◽  
Drainage Area ◽  
Topographic Maps ◽  
Transitional Region ◽  
Morphometric Characteristics ◽  
Main River ◽  
Digital Elevation ◽  
Morphometric Characterization

The purpose of this study was to evaluate the performance of Digital Elevation Models (DEMs) in the morphometric characterization of a basin located in a transitional region between the São Francisco Plateau, São Francisco Depression and Espinhaço Range reliefs. For the study, four DEMs were generated by interpolation of the SRTM data and topographic maps, using the Topo To Raster interpolator with and without mapped hydrography support, available in ArcGIS® 9.3 software. Another DEM was obtained from the SRTM original data. From the generated DEMs, the morphometric characteristics of the basin were determined and compared to those obtained from topographic maps, denominated reference (REF), by means of percentage errors. The evaluation was also performed in a qualitative way, comparing the drainage and the basin delineations. In general, the DEMs obtained with the support of the mapped hydrography (SRTM-TRH and CT-TRH) provided the best results, with small errors, mainly for the main morphometric characteristics of the basin, drainage area and main river length, which ranged from 0.38 to 1.12% and 5.28 to 7.07%, respectively. On the other hand, the DEMs generated without the support of the mapped hydrography (SRTM-O, SRTM-TR and CT-TR) presented major errors mainly in determining the drainage area and length of the main river, which varied from 18.1 to 26.6% and 26.7 to 34.4%, respectively. These occurred due to a deviation of the main river in the São Franciscana Depression region, which allows us to conclude on the necessity and importance of evaluating DEMs before their use.

Parasite defense mechanisms in bees: behavior, immunity, antimicrobials, and symbionts

2019 ◽  
Vol 4 (1) ◽  
pp. 59-76 ◽  
Author(s):  
Alison E. Fowler ◽  
Rebecca E. Irwin ◽  
Lynn S. Adler
Keyword(s):  
Defense Mechanisms ◽  
Poor Quality ◽  
Future Research ◽  
Immune Priming ◽  
Social Bees ◽  
Bee Health ◽  
Landscape Scales ◽  
And Function ◽  
Solitary Species

Parasites are linked to the decline of some bee populations; thus, understanding defense mechanisms has important implications for bee health. Recent advances have improved our understanding of factors mediating bee health ranging from molecular to landscape scales, but often as disparate literatures. Here, we bring together these fields and summarize our current understanding of bee defense mechanisms including immunity, immunization, and transgenerational immune priming in social and solitary species. Additionally, the characterization of microbial diversity and function in some bee taxa has shed light on the importance of microbes for bee health, but we lack information that links microbial communities to parasite infection in most bee species. Studies are beginning to identify how bee defense mechanisms are affected by stressors such as poor-quality diets and pesticides, but further research on this topic is needed. We discuss how integrating research on host traits, microbial partners, and nutrition, as well as improving our knowledge base on wild and semi-social bees, will help inform future research, conservation efforts, and management.

Sources of Chlorophenolic Compounds to the Fraser River Estuary

1988 ◽  
Vol 23 (1) ◽  
pp. 55-68 ◽  
Author(s):  
J. H. Carey ◽  
J. H. Hart
Keyword(s):  
River Flow ◽  
River Estuary ◽  
Low Flow ◽  
Fraser River ◽  
Pulp Mills ◽  
Flow Conditions ◽  
Downstream Site ◽  
Upstream Site ◽  
The North ◽  
Main River

Abstract The identity and concentrations of chlorophenolic compounds in the Fraser River estuary were determined under conditions of high and low river flow at three sites: a site upstream from the trifurcation and at downstream sites for each main river arm. Major chlorophenolics present under both flow regimes were 2,4,6-trichlorophenol (2,4,6-TCP), 2,3,4,6-tetrachlorophenol (2,3,4,6-TeCP), pentachlorophenol (PCP), tetrachloroguaiacol (TeCG) and a compound tentatively identified as 3,4,5-trichloroguaiacol (3,4,5-TCG). Under high flow conditions, concentrations of the guaiacols were higher than any of the Chlorophenols and concentrations of all five chlorophenolics appeared to correlate. Under low flow conditions, concentrations of chloroguaiacols were higher than Chlorophenols at the upstream site and at the downstream site on the Main Arm, whereas at the downstream site on the North Arm, concentrations of 2,3,4,6-TeCP and PCP were higher than the chloroguaiacols in some samples. Overall, the results indicate that pulp mills upstream from the estuary are important sources of chlorophenolics to the estuary under all flow conditions. Additional episodic inputs of 2,3,4,6-TeCP and PCP from lumber mills occur along the North Arm. When these inputs occur, they can cause the concentrations of Chlorophenols in the North Arm to exceed provisional objectives. If chloroguaiacols are included as part of the objective, concentrations of total chlorophenolics in water entering the estuary can approach and exceed these objectives, especially under low flow conditions.

scholarly journals Crowdsourcing and open innovation: a systematic literature review, an integrated framework and a research agenda

2021 ◽  
Author(s):  
Livio Cricelli ◽  
Michele Grimaldi ◽  
Silvia Vermicelli
Keyword(s):  
Literature Review ◽  
Systematic Literature Review ◽  
Open Innovation ◽  
Innovation Management ◽  
Academic Research ◽  
Future Research ◽  
Four Dimensions ◽  
Word Analysis ◽  
The Relationship

AbstractIn recent years, Open Innovation (OI) and crowdsourcing have been very popular topics in the innovation management literature, attracting significant interest and attention, and inspiring a rich production of publications. Although these two topics share common themes and address similar managerial challenges, to the best of our knowledge, there is no systematic literature review that digs deep into the intersection of both fields. To fill in this gap a joint review of crowdsourcing and OI topics is both timely and of interest. Therefore, the main objective of this study is to carry out a comprehensive, systematic, and objective review of academic research to help shed light on the relationship between OI and crowdsourcing. For this purpose, we reviewed the literature published on these two topics between 2008 and 2019, applying two bibliometric techniques, co-citation and co-word analysis. We obtained the following results: (i) we provide a qualitative analysis of the emerging and trending themes, (ii) we discuss a characterization of the intersection between OI and crowdsourcing, identifying four dimensions (strategic, managerial, behavioral, and technological), (iii) we present a schematic reconceptualization of the thematic clusters, proposing an integrated view. We conclude by suggesting promising opportunities for future research.

Ferrous materials degradation: characterisation of rust by colour – an overview

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Desmond E. P. Klenam ◽  
Michael O. Bodunrin ◽  
Stefania Akromah ◽  
Emmanuel Gikunoo ◽  
Anthony Andrews ◽  
...  
Keyword(s):  
Yellow Rust ◽  
Brown Rust ◽  
Future Research ◽  
Stable Form ◽  
Low Oxygen ◽  
High Moisture ◽  
Oxygen Environment ◽  
Causative Factors ◽  
Analytical Tools

Abstract An overview of the characterisation of rust by colour is presented. Each distinct rust colour is caused by atmospheric impurities, high or low moisture content and high or low oxygen environment over time. Yellow rust is mainly due to the high moisture environment over a period of time, which drips. Brown rust is dry, crusty and due to water and oxygen contact with localised patches on component surfaces. Black rust, the most stable form, occurs in low moisture and low oxygen environment. The rust residue shows where the reaction started, especially in contact with chlorides. The causative factors of red rust are atmospheric and similar to black rust in a chloride-containing environment. The effect of packaging, manufacturing and environmental factors on rust colour is briefly discussed. Visual characterization of rust could pre-empt root causes and analytical tools for validation. The limitations of these concepts are mentioned and directions for future research highlighted.

MORPHOMETRIC CHARACTERIZATION OF INTRAEPIDERMAL NEOPLASIAS

1992 ◽  
Vol 14 (1) ◽  
pp. 83
Author(s):  
Donhuijse n ◽  
Knobloc h ◽  
Callie s ◽  
Rütten A.
Keyword(s):  
Morphometric Characterization

scholarly journals How to deal with low-flow low-gradient aortic stenosis and reduced left ventricle ejection fraction: from literature review to tips for clinical practice

2021 ◽  
Author(s):  
F. Contorni ◽  
M. Fineschi ◽  
A. Iadanza ◽  
A. Santoro ◽  
G. E. Mandoli ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Left Ventricle ◽  
Aortic Stenosis ◽  
Ejection Fraction ◽  
Left Ventricle Ejection Fraction ◽  
Low Flow ◽  
Diagnostic Tools ◽  
Transcatheter Aortic Valve ◽  
Valve Implantation

AbstractLow-flow low-gradient aortic stenosis (LFLG AS) with reduced left ventricle ejection fraction (LVEF) is still a diagnostic and therapeutic challenge. The aim of this paper is to review the latest evidences about the assessment of the valvular disease, usually difficult because of the low-flow status, and the therapeutic options. Special emphasis is given to the available diagnostic tools for the characterization of LFLG AS without functional reserve at stress echocardiography and to the factors that clinicians should evaluate to choose between surgical aortic valve repair, transcatheter aortic valve implantation, or medical therapy.

Morphometric Characterization of HPV-Related Lesions of Uterine Cervix

2000 ◽  
Vol 4 (4) ◽  
pp. 204-207
Author(s):  
Carlos Roberto de Resende Miranda ◽  
Liane Deligdisch ◽  
Joan Gil ◽  
Peter Dottino
Keyword(s):  
Uterine Cervix ◽  
Morphometric Characterization

Production of Bio Gas from Vegetable and Flowers Wastes Using Anaerobic Digestion

2015 ◽  
Vol 787 ◽  
pp. 803-808 ◽  
Author(s):  
A. Deepanraj ◽  
S. Vijayalakshmi ◽  
J. Ranjitha
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Research Work ◽  
Pressure Gauge ◽  
Pig Manure ◽  
Future Research ◽  
Digital Pressure ◽  
Vegetable Wastes ◽  
Main Component

The present research paper describes about the anaerobic digestion of vegetable (Banana, Cauliflower, potato, and sweet potato) and flower wastes (Rose, sambangi, gulmohar, marigold, golden shower tree, silk tree mimosa) in a 1L capacity of anaerobic digestor using pig manure as an inoculums. The digester was operated in the ratio of 1:1 of substrate to inoculums at RT. The substrate concentrations are varied such as 5%, 7%, and 10% was used and amount of gas produced was analysed using digital pressure gauge. The results obtained showed that, marigold flower had given higher yield of biogas than vegetable wastes and the digestion period was less. The average biogas production potential of withered flowers was observed as 14.36 g/kg in 5 days, where in case of vegetable wastes it was 10.0234 g/kg in 6 days. The study showed that flowers which are available in abundant in India is thrown away within a day, in the environment. These feedstocks are good feed stock for the production of biogas. The generation of biogas from flowers and vegetable waste upholds the concept of waste to wealth in enhancing sustainability of development. The future research work is mainly focused on the characterization of the main component present in the bio-gas using sophisticated instruments.

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