PubAg

Main content area

You searched for: Subject "morphometry" Remove constraint Subject: "morphometry"
Start Over

Search

5,870  Search Results

« Previous | 1 - 20 of 5,870 |
Number of results to display per page

Search Results

1. Object-based land surface segmentation scale optimisation: An ill-structured problem

Author:
Louw, Gerrit; van Niekerk, Adriaan
Source:
Geomorphology 2019 v.327 pp. 377-384
ISSN:
0169-555X
Subject:
morphometry,   etc   ; probability; variance;     Show all 3 Subjects
Abstract:
... The segmentation of continuous land surfaces into morphologically representative objects has received increasing attention in recent years. Multi-resolution segmentation (MRS) has been shown to delimit morphological boundaries accurately and the use of unsupervised data-driven local variance (LV) based methods for detecting characteristic levels of scale parameter (SP) in land surfaces has been es ...
DOI:
10.1016/j.geomorph.2018.11.021

2. Unilateral and bilateral agenesis of the upper thyroid horns — A morphometric analysis of the larynx

Author:
Winzek, Can-Felix; Hartrampf, Luisa C.M.; Kampschulte, Marian; Pons-Kühnemann, Jörn; Birngruber, Christoph G.; Dettmeyer, Reinhard; Saternus, Klaus-Steffen
Source:
Forensic science international 2019 v.301 pp. 225-230
ISSN:
0379-0738
Subject:
morphometry,   etc   ; cartilage; horns; larynx; surveys;     Show all 5 Subjects
Abstract:
... The agenesis of one or both upper thyroid horns (UTH) cannot be considered rare with an incidence ranging between 0.8–9.4%. Studies so far have mostly described frequencies, yet surveys on its morphology and traumatology are missing. It is unknown to what extent this anatomical variant impacts the overall symmetry of the larynx. For the trauma reconstruction after cervical trauma this knowledge is ...
DOI:
10.1016/j.forsciint.2019.05.038

3. Morphological differentiation among populations of Sarotherodon melanotheron melanotheron Rüppell 1852 across the West African Lagoon systems (Benin, Cameroon, Nigeria, Togo)

Author:
Popoola, MO; Schedel, FDB; Akintoye, MA
Source:
African journal of aquatic science 2019 v.44 no.1 pp. 43-52
ISSN:
1727-9364
Subject:
morphometry,   etc   ; Sarotherodon; vision; Benin; Cameroon; Nigeria;     Show all 6 Subjects
Abstract:
... Morphometric variation among populations of Sarotherodon melanotheron melanotheron across its natural range (Mahin, epe, Lekki, Apese, Kuramo, Lagos, Iyagbe, Ologe, Badagry, Yewa – Nigeria; Be Lagoon – Togo; Idenau – Cameroon, Aheme – Benin; Portonovo – Benin) were studied to assess the level of differentiation of one of the populations that is currently isolated from the rest, the Apese Lagoon po ...
DOI:
10.2989/16085914.2018.1548341

4. An integrated framework to identify and analyze karst sinkholes

Author:
Zumpano, V.; Pisano, L.; Parise, M.
Source:
Geomorphology 2019 v.332 pp. 213-225
ISSN:
0169-555X
Subject:
morphometry,   etc   ; aerial photography; automation; karsts; landscapes; Italy;     Show all 6 Subjects
Abstract:
... Sinkholes are the most typical surface feature of karst landscapes. Their correct mapping is of great importance for a proper assessment of the possible occurrence of new events, and the likely effects they could have on the anthropogenic environment. In this work we compare and discuss different ways to map sinkholes, including heuristic approach, automatic mapping through different resolution DT ...
DOI:
10.1016/j.geomorph.2019.02.013

5. Meandering rivers in modern desert basins: Implications for channel planform controls and prevegetation rivers

Author:
Santos, Mauricio G.M.; Hartley, Adrian J.; Mountney, Nigel P.; Peakall, Jeff; Owen, Amanda; Merino, Eder R.; Assine, Mario L.
Source:
Sedimentary geology 2019 v.385 pp. 1-14
ISSN:
0037-0738
Subject:
morphometry,   etc   ; basins; models; remote sensing; rivers; vegetation;     Show all 6 Subjects
Abstract:
... The influence of biotic processes in controlling the development of meandering channels in fluvial systems is controversial. The majority of the depositional history of the Earth's continents was devoid of significant biogeomorphic interactions, particularly those between vegetation and sedimentation processes. The prevailing perspective has been that prevegetation meandering channels rarely devel ...
DOI:
10.1016/j.sedgeo.2019.03.011

6. Geometric morphometrics, homology and cladistics: review and recommendations

Author:
Palci, Alessandro; Lee, Michael S. Y.
Source:
Cladistics 2019 v.35 no.2 pp. 230-242
ISSN:
0748-3007
Subject:
morphometry,   etc   ; ancestry; geometry; guidelines; phylogeny; trees;     Show all 6 Subjects
Abstract:
... Geometric morphometric (GM) data has a long and contentious history in phylogenetic analyses. Often associated with phenetics, GM has been considered by many to be unable to provide meaningful information on phylogenetic relationships. However, the concepts of primary and secondary homology as developed for discrete characters can be readily extended to GM data: raw similarity in aligned landmark ...
DOI:
10.1111/cla.12340

7. Working with broken agents: Exploring computational 2D morphometrics for studying the (post)depositional history of potsherds

Author:
Vindrola-Padrós, Bruno; Moulding, Dale; Astaloş, Ciprian; Virag, Cristian; Sommer, Ulrike
Source:
Journal of archaeological science 2019 v.104 pp. 19-33
ISSN:
0305-4403
Subject:
morphometry,   etc   ; archaeology; ceramics; sediments; weathering; Romania;     Show all 6 Subjects
Abstract:
... The study of size and shape of ceramic fragments is a common approach used for unraveling the depositional and post-depositional history of archaeological assemblages. Similar to sediment particles, the size and shape of a potsherd are altered under conditions of abrasion, breakage, or weathering, occurring during or after deposition, which can be the product of both human and non-human agents. Th ...
DOI:
10.1016/j.jas.2019.01.008

8. Distribution and morphology of landslides in northern Finland: An analysis of postglacial seismic activity

Author:
Ojala, Antti E.K.; Mattila, Jussi; Markovaara-Koivisto, Mira; Ruskeeniemi, Timo; Palmu, Jukka-Pekka; Sutinen, Raimo
Source:
Geomorphology 2019 v.326 pp. 190-201
ISSN:
0169-555X
Subject:
morphometry,   etc   ; data collection; earthquakes; geophysics; landslides; Finland;     Show all 6 Subjects
Abstract:
... The ages and sizes of landslides occurring in seismically active areas can be used to reconstruct the seismic history of the area and estimate the maximum moment magnitudes of past earthquakes. Here, we present a data set of 121 landslides discovered in northern Finland that were analyzed for their morphometric characteristics. We show that 89 debris slide type landslides in the data set are clust ...
DOI:
10.1016/j.geomorph.2017.08.045

9. Morphometric analysis and the distinction between Tibouchina hatschbachii and T. marumbiensis: morphological differentiation driven from the past

Author:
Maia, Fabiano R.; Goldenberg, Renato
Source:
Plant systematics and evolution 2019 v.305 no.2 pp. 169-180
ISSN:
0378-2697
Subject:
morphometry,   etc   ; Tibouchina; granite; grasslands; multivariate analysis; sandstone;     Show all 6 Subjects
Abstract:
... The taxonomic delimitation of Tibouchina hatschbachii and T. marumbiensis has been subject to some controversy. According to the original descriptions, plants from grasslands on sandstone areas were identified as T. hatschbachii, whereas plants from grasslands on granite as T. marumbiensis. Due to a considerable morphological overlap, T. marumbiensis has been recognized as a synonym of T. hatschba ...
DOI:
10.1007/s00606-018-1560-x

10. Quantitative observations on tropical cyclone tracks in the Arabian Sea

Author:
Terry, James P.; Gienko, Gennady
Source:
Theoretical and applied climatology 2019 v.135 no.3-4 pp. 1413-1421
ISSN:
0177-798X
Subject:
morphometry,   etc   ; basins; geography; hurricanes; longevity; Arabian Sea;     Show all 6 Subjects
Abstract:
... The Arabian Sea basin represents a minor component of global total cyclones annually and has not featured so prominently in cyclone research compared with other basins where greater numbers of cyclones are registered each year. This paper presents the results of exploratory analysis of various features of cyclone tracks in the Arabian Sea, with a particular focus on examining their temporal and sp ...
DOI:
10.1007/s00704-018-2445-1

11. Unraveling the Morphology–Function Relationships of Polyamide Membranes Using Quantitative Electron Tomography

Author:
Song, Xiaohui; Smith, John W.; Kim, Juyeong; Zaluzec, Nestor J.; Chen, Wenxiang; An, Hyosung; Dennison, Jordan M.; Cahill, David G.; Kulzick, Matthew A.; Chen, Qian
Source:
ACS applied materials & interfaces 2019 v.11 no.8 pp. 8517-8526
ISSN:
1944-8252
Subject:
morphometry,   etc   ; adsorption; engineering; nanomaterials; polyamides; tomography; wastewater;     Show all 7 Subjects
Abstract:
... An understanding of how complex nanoscale morphologies emerge from synthesis would offer powerful strategies to construct soft materials with designed structures and functions. However, these kinds of morphologies have proven difficult to characterize, and therefore manipulate, because they are three-dimensional (3D), nanoscopic, and often highly irregular. Here, we studied polyamide (PA) membrane ...
DOI:
10.1021/acsami.8b20826

12. Archaeology, biology, and borrowing: A critical examination of Geometric Morphometrics in Archaeology

Author:
Okumura, Mercedes; Araujo, Astolfo G.M.
Source:
Journal of archaeological science 2019 v.101 pp. 149-158
ISSN:
0305-4403
Subject:
morphometry,   etc   ; allometry; archaeology; geometry; ontogeny; phylogeny;     Show all 6 Subjects
Abstract:
... Geometric Morphometrics (GM) is a method originally applied in Evolutionary Biology studies, using the analysis of change in size and shape in order to better understand ontogenetic sequences, phylogenetic relations, among other issues. The application of GM in archaeological materials has seen a sharp increase in the last decade, mostly associated with theoretical approaches from Evolutionary Arc ...
DOI:
10.1016/j.jas.2017.09.015

13. Geometric morphometrics and finite elements analysis: Assessing the functional implications of differences in craniofacial form in the hominin fossil record

Author:
O'Higgins, Paul; Fitton, Laura C.; Godinho, Ricardo Miguel
Source:
Journal of archaeological science 2019 v.101 pp. 159-168
ISSN:
0305-4403
Subject:
morphometry,   etc   ; archaeology; deformation; fossils; geometry; models; uncertainty;     Show all 7 Subjects
Abstract:
... The study of morphological variation in the hominin fossil record has been transformed in recent years by the advent of high resolution 3D imaging combined with improved geometric morphometric (GM) toolkits. In parallel, increasing numbers of studies have applied finite elements analysis (FEA) to the study of skeletal mechanics in fossil and extant hominoid material. While FEA studies of fossils a ...
DOI:
10.1016/j.jas.2017.09.011

14. Andersen’s leaf-nosed bat (Hipposideros pomona) is still living in the Chittagong Hill Tracts, Bangladesh

Author:
Saha, Anik; Feeroz, Mohammed Mostafa; Hasan, Md. Kamrul
Source:
Mammalia 2018 v.82 no.4 pp. 407-409
ISSN:
1864-1547
Subject:
morphometry,   etc   ; Hipposideros; teeth; Bangladesh;     Show all 4 Subjects
Abstract:
... We report the recent record of Andersen’s leaf-nosed bat, Hipposideros pomona (Andersen 1918) from a narrow cave in the south-east corner of the Chittagong Hill Tracts (CHT), Bangladesh. The identification was based on morphometric analysis along with dentition structure. This recent finding speaks to the existence of H. pomona in Bangladesh and extends the range of this species over South Asia. ...
DOI:
10.1515/mammalia-2017-0027

15. Confirmed occurrence of the Cusk-eel Ophidion barbatum (Osteichthyes: Ophidiidae) from the Coast of Tunisia (Central Mediterranean)

Author:
Rafrafi-Nouira, S.; Golani, D.; Capapé, C.
Source:
Journal of ichthyology 2018 v.58 no.3 pp. 428-431
ISSN:
0032-9452
Subject:
morphometry,   etc   ; Ophidion; coasts; Tunisia;     Show all 4 Subjects
Abstract:
... This paper reports the second record but also the first substantiated record of cusk-eel Ophidion barbatum (Linnaeus, 1758) from the northern coast of Tunisia, 168 mm in total length and weighing 18.3 g. The specimen is described including morphometric measurements and counts. Differences from its close relative species O. rochei (Linnaeus, 1758) are pointed out that confirm the occurrence of O ba ...
DOI:
10.1134/S003294521803013X

16. First Substantiated Record of Sand Sole Pegusa lascaris (Osteichthyes: Soleidae) from the Coast of Tunisia (Central Mediterranean)

Author:
K. Ounifi-Ben Amor,; Ben Amor, M. M.; Capapé, C.
Source:
Journal of ichthyology 2018 v.58 no.6 pp. 948-952
ISSN:
0032-9452
Subject:
morphometry,   etc   ; Soleidae; coasts; sand; Tunisia;     Show all 5 Subjects
Abstract:
... Sand sole, Pegusa lascaris (Risso, 1810), was previously reported in the Tunisian marine waters but no details were provided on its description and capture. Two captures of the species off Kélibia, in the northeastern coast of Tunisia allow us to present the first substantiated records in the this area, including description, morphometric measurements and meristic counts. Comments on the distribut ...
DOI:
10.1134/S0032945218060127

17. Geometric morphometrics in entomology: Basics and applications

Author:
Tatsuta, Haruki; Takahashi, Kazuo H.; Sakamaki, Yositaka
Source:
Entomological science 2018 v.21 no.1 pp. 164-184
ISSN:
1343-8786
Subject:
morphometry,   etc   ; computer software; entomology; geometry;     Show all 4 Subjects
Abstract:
... The recent expansion of a variety of morphometric tools has brought about a revolution in the comparison of morphology in the context of the size and shape in various fields including entomology. First, an overview of the theoretical issues of geometric morphometrics is presented with a caution about the usage of traditional morphometric measurements. Second, focus is then placed on two broad appr ...
DOI:
10.1111/ens.12293

18. Morphometric characterization of foredunes along the coast of northern Spain

Author:
de Almeida, L.R.; González, M.; Medina, R.
Source:
Geomorphology 2019 v.338 pp. 68-78
ISSN:
0169-555X
Subject:
morphometry,   etc   ; allometry; beaches; coasts; eolian sands; storms; vegetation; Spain;     Show all 8 Subjects
Abstract:
... Foredunes are defined as the first shore-parallel dune ridges adjacent to stable and prograding beaches, formed on the backshore by aeolian sand deposition influenced by vegetation. Foredunes have the important functions for mitigating impacts caused by extreme events, providing sediment to the beaches during storm and accumulating sediment again under fair weather wave conditions. Mainly for this ...
DOI:
10.1016/j.geomorph.2019.04.019

19. Investigating topographic metrics to decipher structural model and morphotectonic evolution of the Frontal Siwalik Ranges, Central Himalaya, Nepal

Author:
Divyadarshini, Ananya; Singh, Vimal
Source:
Geomorphology 2019 v.337 pp. 31-52
ISSN:
0169-555X
Subject:
morphometry,   etc   ; drainage; models; rivers; topography; Himalayan region; Nepal;     Show all 7 Subjects
Abstract:
... The fold-and-thrust belt in the Himalayan front is marked by the upliftment of the Frontal/Outermost Siwalik Hills along the Main Frontal Thrust (MFT). These frontal ranges display distinct morphology with prominent curved/stair-stepped and overlapping segments in the central Himalaya. In this study, we analyse the structural framework, morphology, growth and relative uplift rates of the frontal r ...
DOI:
10.1016/j.geomorph.2019.03.028

20. A template-dependent semilandmarks treatment and its use in medical entomology

Author:
Dujardin, Jean-Pierre
Source:
Infection, genetics, and evolution 2019 v.70 pp. 197-207
ISSN:
1567-1348
Subject:
morphometry,   etc   ; arthropods; computer software; geometry; medical entomology; species identification;     Show all 6 Subjects
Abstract:
... In medical entomology, as well as in many other groups of arthropods, geometric morphometrics has become a powerful tool for species identification and population characterization. The approach lies on the relative position of some anatomical points (landmarks) or, more recently, of curved features (semilandmarks). Landmarks are described by coordinates of points easy to recognize from one individ ...
DOI:
10.1016/j.meegid.2019.03.002