Relevant bibliographies by topics / Morphological Parameter / Journal articles

Journal articles on the topic 'Morphological Parameter'

To see the other types of publications on this topic, follow the link: Morphological Parameter.
Author: Grafiati
Published: 14 March 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Morphological Parameter.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Davies, William D. "Morphological uniformity and the null subject parameter in adult SLA." Studies in Second Language Acquisition 18, no. 4 (December 1996): 475–93. http://dx.doi.org/10.1017/s0272263100015382.

Full text
Abstract:
An area of keen interest in applying Chomsky's UG parameter-setting model to SLA has been the Pro-Drop or Null Subject Parameter (Cyrino, 1986; Hilles, 1986; Phinney, 1987; White, 1985, 1986). However, the nature of this parameter changes dramatically from the Jaeggli (1982) and Rizzi (1982) conception with Jaeggli and Safir's (1989) proposal linking uniform morphological agreement paradigms with null subjects. Data reported here show a number of L2 learners exhibit knowledge that English is morphologically nonuniform yet still accept English null subject sentences. This is inconsistent with the predictions of the Morphological Uniformity Hypothesis and renders uncertain its applicability to SLA. The results are considered in light of a number of possible positions that can be adopted when faced with data that disconfirm a hypothesis within the UG SLA research program; it is concluded that the Morphological Uniformity Hypothesis is disconfirmed and that any reformulation of the Null Subject Parameter must take these results into consideration.
APA, Harvard, Vancouver, ISO, and other styles
2

Lalvani, Haresh. "Meta-Morphological Technique for a Multi-Parameter Design Index." International Journal of Space Structures 8, no. 4 (December 1993): 241–49. http://dx.doi.org/10.1177/026635119300800402.

Full text
Abstract:
Complex design and morphologic problems, consisting of multiple parameters, can be described, modelled and indexed using a meta-morphological technique presented here. All design and morphologic variables can be mapped in Euclidean n-dimensional space, where n is the number of variables. This meta-space contains all the possible solutions to the problem and each point in this solution n-space is a candidate solution. The desired solution, represented by a specific point in this space and coded (addressed) by its n-dimension Cartesian co-ordinates, is ranked by the hyper-distance of this point from the origin. The hyper-distance itself provides a design index (or hyper-index) of the solution and can be determined by the known hyper-Pythagorean theorem. The procedure is recursive and applies to complex design problems which are hierarchical and composed of problem-within-problem-within-problems. Here the parameters are composed of subparameters, and the solutions are correspondingly mapped in a recursive, fractal n-cube composed of sub-cubes composed of sub-sub-cubes. The total composite index is determined by the recursive application of the hyper-Pythagorean theorem and represents a quantification of the morphological complexity of the design. The model is independent of the design problem, and has attractive possibilities for application in computer-aided design environments. The application is shown with the hypothetical selection of a space frame from a number of alternatives.
APA, Harvard, Vancouver, ISO, and other styles
3

Kvesić, Stjepan, Mirzeta Memišević Hodžić, Matijaž Čater, and Dalibor Ballian. "Morphologic variability of the Acer campestre L. populations in Bosnia and Herzegovina." Acta Biologica Sibirica 7 (November 15, 2021): 327–43. http://dx.doi.org/10.3897/abs.7.e73001.

Full text
Abstract:
Morphologic variability from 25 populations of Acer campestre L. in Bosnia and Herzegovina was analyzed. Morphometric structure of variability and between-population variability was performed based on 10 fruit-parameter characteristics and 19 leaf-parameter characteristics using multivariate statistical analysis. Results confirmed the separation of three submediterranean populations as a group in relation to other tested populations, from which the Banja Luka population is different. Measured leaf parameters were confirmed as a predominant carrier of the morphologic separation between populations. In other Acer species populations within A. monspessulanum and A. intermedium species are separated mainly by fruit and much less by leaf parameters. The southernmost submediterranean populations from Trebinje, Ljubuški, and Mostar regions have smaller leaf areas, which consequently places them within the same morphologic group; their variability is in tight connection with eco-geo-graphical factors, where the ecological distance is a much better predictor of morphological variability compared to geographical distance. The air temperature had the biggest influence on morphological variability regarding the highest in-between correlation. Achieved results may serve for the continuation of the research in other areas of Acer campestre to determine the interactive effect of ecological, geographical, climatic, and migrational factors on their morphologic population plasticity.
APA, Harvard, Vancouver, ISO, and other styles
4

Wei, Xile, Xiaowei Yin, Meili Lu, Guosheng Yi, and Jiang Wang. "Dependence of sinusoidal electric field effect on neuronal morphological properties." International Journal of Modern Physics B 29, no. 15 (May 25, 2015): 1550092. http://dx.doi.org/10.1142/s0217979215500927.

Full text
Abstract:
In this paper, the neuronal firing patterns under extracellular sinusoidal electric field (EF) are investigated based on a reduced two-compartment model with focus on the effects of morphological and internal coupling parameters. We observe that the neuron can exhibit bursting, synchronous firing and subthreshold oscillation depending on EF amplitude A and frequency f. Furthermore, neuronal firing properties change obviously over a range of morphological parameter p. As p increases, the firing region expands first and then diminishes gradually until it disappears in the observed (A, f) parameter space and the transition from bursting to synchronous firing is also markedly distinct. Meanwhile, the morphological parameter also has significant effects on the EF threshold for triggering neuronal spikes. Unlike morphological parameter, though the internal coupling conductance gc can also induce some changes in firing behavior and EF threshold, it cannot qualitatively change neuronal dynamical properties. All these results demonstrate that neuronal morphology plays a crucial role in neuronal responses to sinusoidal EF.
APA, Harvard, Vancouver, ISO, and other styles
5

Yamauchi, Chisato, Shin-ichi Ichikawa, Mamoru Doi, Naoki Yasuda, Masafumi Yagi, Masataka Fukugita, Sadanori Okamura, Osamu Nakamura, Maki Sekiguchi, and Tomotsugu Goto. "Morphological Classification of Galaxies Using Photometric Parameters: The Concentration Index versus the Coarseness Parameter." Astronomical Journal 130, no. 4 (October 2005): 1545–57. http://dx.doi.org/10.1086/444416.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Pramudita, Listya, Eny Widajati, Faiza Chairani Suwarno, and Dan Memen Surahman. "Karakteristik Morfologi Benih sebagai Parameter untuk Penentuan Pohon Induk Sumber Benih Pala (Myristica fragrans Houtt.)." Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) 45, no. 1 (May 9, 2017): 64–70. http://dx.doi.org/10.24831/jai.v45i1.13755.

Full text
Abstract:
Nutmeg is an Indonesian native plant, produces essential oill as an export commodity. However, it has low seed uniformity that mengurangi keseragaman tanaman di lapang. The main objective of this research was to obtain morphological characteritics as parameter for nutmeg mother plants selection. This field research was carried out from August-December 2014 at Toisapu, Wakal and Lula nutmeg seed source plantations in Ambon, and Seed Storage and Testing Laboratory, IPB. Characterization was undertaken on ten mother plants from each Wakal and Lula seed source plantations and eight mother plants from Toisapu seed source plantation. Quantitative and qualitative characters of vegetative, fruit, mace and seed from every mother plants were analyzed with Gower’s similarity test. Mother plants that produced high uniformity seed was the 7th (0.80), the 8th (0.93) and the 10th (0.80) mother plants in Wakal; the 2nd (0.80) mother plant in Toisapu; the 2nd (0.82), the 5th (0.80), the 6th (0.82), the 8th (0.84), the 9th (0.80) and the 10th (0.93) mother plants in Lula. Those selected mother plants produced morphological uniform seed morphologically. Lula seed plantation had the highest uniformity level among mother plants (0.77-0.87) compared to Toisapu (0.70-0.87) and Wakal (0.69-0.84) mother plants. The morphological characteristic can be use to select the source seed mother plants which able to produce high morphological uniformity seeds.Keywords: Gower’s similarity, seed production, uniformity
APA, Harvard, Vancouver, ISO, and other styles
7

Kroon, Anna, Matthieu De Schipper, and Stefan Aarninkhof. "QUANTIFICATION OF PARAMETER AND CALIBRATION UNCERTAINTY IN MORPHOLOGICAL MODELLING." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 27. http://dx.doi.org/10.9753/icce.v36.sediment.27.

Full text
Abstract:
There are different sources of uncertainty in morphological modeling on time scales of years. The standard deterministic modelling approach does not provide any information on the amount of uncertainty contained in a forecast. This lack of information could provide a false sense of accuracy and skill. Quantitative insight in these prediction uncertainties is therefore of crucial importance for decision making in coastal engineering and management.
APA, Harvard, Vancouver, ISO, and other styles
8

Tobin, Anne-Elise, and Ronald L. Calabrese. "Endogenous and Half-Center Bursting in Morphologically Inspired Models of Leech Heart Interneurons." Journal of Neurophysiology 96, no. 4 (October 2006): 2089–106. http://dx.doi.org/10.1152/jn.00025.2006.

Full text
Abstract:
Based on a detailed morphology “Full Model” of a leech heart interneuron, we previously developed a computationally efficient, morphologically inspired “Reduced Model” to expedite tuning the model to produce endogenous bursting and alternating bursting when configured as a half-center oscillator (paired with reciprocally inhibitory synapses). To find conductance density distributions that produce endogenous bursting, we implemented a genetic algorithm automated parameter search. With multiple searches, we found eight parameter sets that produced endogenous bursting in the Reduced Model. When these parameter sets were applied to the Full Model, all produced endogenous bursting, although when the simulation time was extended from 80 to 300 s, only four parameter sets produced sustained bursting in the Reduced Models. All parameter sets produced alternating half-center bursting in the Reduced and Full Models throughout the entire 300 s. When conductance amplitudes were systematically varied for each of the four sustained burster sets, the effects on bursting activity differed, both for the same parameter set in the Reduced and Full Models and for different parameter sets with the same level of morphological detail. This implies that morphological detail can affect burst activity and that these parameter sets may represent different mechanisms for burst generation and/or regulation. We also tested the models with parameter variations that correspond to experimental manipulations. We conclude that, whereas similar output can be achieved with multiple different parameter sets, perturbations such as conductance variations can highlight differences. Additionally, this work demonstrates both the utility and limitations of using simplified models to represent more morphologically accurate models.
APA, Harvard, Vancouver, ISO, and other styles
9

Devitt, D. A., and R. L. Morris. "Morphological Response of Flowering Annuals to Salinity." Journal of the American Society for Horticultural Science 112, no. 6 (November 1987): 951–55. http://dx.doi.org/10.21273/jashs.112.6.951.

Full text
Abstract:
Abstract Ten flowering annuals were greenhouse-grown and irrigated with four levels of saline water [electrical conductivities (EC) = 0.8, 1.5, 3.0, 4.5 dS·m−1] to determine their response to increased salinization. Twelve different parameters were monitored at the end of an 8-week period. All 10 species differed in their response to salinization. The relative number of flowers and the relative maximum flower diameter at harvest decreased significantly for six of ten and seven of nine species, respectively, with increased salinity. A salt tolerance scale was devised that best described their response to salinity. The parameters selected were dry weight, plant height, number of flowers, and maximum flower diameter. Cosmos (Cosmos bipinatus Cav. ‘Sunny Gold’) was rated very sensitive for all four parameters. Following Cosmos, the rating changed and so did the sequence, depending on the parameter being considered. Both petunias (Petunia hybrida Linn. ‘White Cascade’ and ‘Challenger White’) and dianthus (Dianthus chinensis Linn. ‘Princess White’) were the only species rated very tolerant for all four parameters.
APA, Harvard, Vancouver, ISO, and other styles
10

McKENZIE, J., S. MARSHALL, A. J. GRAY, and E. R. DOUGHERTY. "MORPHOLOGICAL TEXTURE ANALYSIS USING THE TEXTURE EVOLUTION FUNCTION." International Journal of Pattern Recognition and Artificial Intelligence 17, no. 02 (March 2003): 167–85. http://dx.doi.org/10.1142/s0218001403002290.

Full text
Abstract:
This paper develops a new technique for modeling and classifying a growing texture using its evolution function over time. It encompasses morphological texture classification and parameter estimation with the objective of assessing the state of growth achieved by the texture using only a small sample set to train on, consistent with many real world situations for quality control. It is assumed that the texture model evolves over time according to the way in which its evolution function determines the parameters of its defining random process. This paper considers the random Boolean model for both binary and gray-scale images. A multiple linear regression model is used to estimate the Boolean model parameters as functions of the granulometric moments of the textures. Once the texture-model parameters are estimated, the time of the process can be found via the manner in which the parameters are determined by the dynamic evolutionary model.
APA, Harvard, Vancouver, ISO, and other styles
11

CHEN, Yu-Li, Ping YANG, Wen-Yu ZHANG, Wei-Xin ZHANG, Ye-Ping ZHU, Shi-Juan LI, Fa-Jiang GONG, Hai-Bin BI, Ting YUE, and Hong-Xin CAO. "Biomass-Based Main Spike Morphological Parameter Model for Winter Wheat." Acta Agronomica Sinica 43, no. 3 (2017): 399. http://dx.doi.org/10.3724/sp.j.1006.2017.00399.

Full text
APA, Harvard, Vancouver, ISO, and other styles
12

Wang, Rui, Cheng Hu, Changjiang Liu, Teng Long, Shaoyang Kong, Tianjiao Lang, Philip J. L. Gould, Jason Lim, and Kongming Wu. "Migratory Insect Multifrequency Radar Cross Sections for Morphological Parameter Estimation." IEEE Transactions on Geoscience and Remote Sensing 57, no. 6 (June 2019): 3450–61. http://dx.doi.org/10.1109/tgrs.2018.2884926.

Full text
APA, Harvard, Vancouver, ISO, and other styles
13

Abbiramy, V. S., and Dr V. Shanthi. "Spermatozoa Segmentation and Morphological Parameter Analysis Based Detection of Teratozoospermia." International Journal of Computer Applications 3, no. 7 (June 10, 2010): 19–23. http://dx.doi.org/10.5120/743-1050.

Full text
APA, Harvard, Vancouver, ISO, and other styles
14

Moraes, Ana Paula de, Fernanda Bered, Fernando Irajá Felix de Carvalho, and Eliane Kaltchuk-Santos. "Morphological markers for microspore developmental stage in maize." Brazilian Archives of Biology and Technology 51, no. 5 (October 2008): 911–16. http://dx.doi.org/10.1590/s1516-89132008000500006.

Full text
Abstract:
The use of maize in anther culture has been limited because only few genotypes presented a high androgenetic potential. Obtaining the proper stage of microspore development at culture initiation is one of the most crucial factors for success in the androgenesis. For Brazilian maize genotypes there are no studies reporting a correlation between cytological features and morphological parameters. In this study, morphological parameters were recorded and associated with cytological specific stages of the the microsporogenesis in two Brazilian maize genotypes that were sowed in different places (field and growing chamber). For both genotypes, the plants of the growing chamber presented a delay in development. Spikelets length and anther length/spikelet length ratio are not good parameters since they can be greatly influenced by the environment. The anther length was the more reliable parameter to correlate with a specific developmental stage. Nevertheless, variations between genotypes and environment were detected.
APA, Harvard, Vancouver, ISO, and other styles
15

Capalbo, Valentina, Marco De Petris, Federico De Luca, Weiguang Cui, Gustavo Yepes, Alexander Knebe, Elena Rasia, Florian Ruppin, and Antonio Ferragamo. "Morphological analysis of SZ and X-ray maps of galaxy clusters with Zernike polynomials." EPJ Web of Conferences 257 (2022): 00008. http://dx.doi.org/10.1051/epjconf/202225700008.

Full text
Abstract:
Several methods are used to evaluate, from observational data, the dynamical state of galaxy clusters. Among them, the morphological analysis of cluster images is well suited for this purpose. We report a new approach to the morphology, which consists in analytically modelling the images with a set of orthogonal functions, the Zernike polynomials (ZPs). We validated the method on mock high-resolution Compton parameter maps of synthetic galaxy clusters from The Three Hundred project. To classify the maps for their morphology we defined a single parameter, C, by combining the contribution of some ZPs in the modelling. We verify that C is linearly correlated with a combination of common morphological parameters and also with a proper 3D dynamicalstate indicator available for the synthetic clusters we used. We also show the early results of the Zernike modelling applied on Compton parameter maps of local clusters (z < 0:1) observed by the Planck satellite. At last, we report the preliminary results of this kind of morphological analysis on mock X-ray maps of The Three Hundred clusters.
APA, Harvard, Vancouver, ISO, and other styles
16

Radulovic, Nikola, Marina Pavlovic, and Tijana Prodanovic. "Examining the morphology of galaxies at high redshifts." Zbornik Matice srpske za prirodne nauke, no. 137 (2019): 23–31. http://dx.doi.org/10.2298/zmspn1937023r.

Full text
Abstract:
Irregular galaxies are considered to be results of collisions or close approaches between galaxies. In the local universe, determining the morphological type and collision stage does not pose a problem. However, when it comes to galaxies at high redshifts, determining morphology is non-trivial. In this paper, the morphological parameters used to determine the morphology of galaxies at large redshifts will be summarised and described in detail. The aim of this research is to examine the sensitivity of morphological parameters at different collision stages on galaxies in the Local Universe, so that the most sensitive parameter can be found and later applied to the study of collisions between distant galaxies.
APA, Harvard, Vancouver, ISO, and other styles
17

Xu, Liejiong. "topic-prominence parameter." ZAS Papers in Linguistics 20 (January 1, 2000): 21–41. http://dx.doi.org/10.21248/zaspil.20.2000.77.

Full text
Abstract:
This article aims to recast the properties of topic-prominent languages and their differences from subject-prominent languages as documented in the functionalist literature into the framework of the Principle-and-Parameter approach. It provides a configurational definition of the topic construction called Topic Phrase (TP), with the topic marker as its head. The availablity of TP enables topic prominent languages to develop various topic structures with properties such as morphological marking; cross-categorial realization of topics and comments; and mutiple application of topicalization. The article elaborates the notion of topic prominence. A topic prominent language is characterized as one that tends to activate the TP and to make full use of the configuration. Typically, it has a larger number and variety of highly grammaticalized topic markers in the Lexicon and permits a variety of syntactic categories to occur in the specifier position and the complement position of TP.
APA, Harvard, Vancouver, ISO, and other styles
18

Jin, Hyeok, Kideok Do, Inho Kim, and Sungyeol Chang. "Sensitivity Analysis of Event-Specific Calibration Data and Its Application to Modeling of Subaerial Storm Erosion under Complex Bathymetry." Journal of Marine Science and Engineering 10, no. 10 (September 28, 2022): 1389. http://dx.doi.org/10.3390/jmse10101389.

Full text
Abstract:
Key parameters in a process-based model depicting the morphological changes during storm events should be adjusted to simulate the hydro- and morphodynamics, leading to site-, profile-, and event-specific calibration. Although area models eliminate variability in calibrated parameters along with each profile in complex bathymetry, the amount of influence datasets with different wave conditions have on model performance is still unclear in an area model in a given parameter space. This study collected hydrodynamic and bathymetric field data over four different storm conditions (two single and two cluster storms) at Maengbang Beach, South Korea. The numerical model XBeach was adopted using four storm datasets with four key parameters to examine the influence of event-specific calibration data on subaerial storm erosion. When using clustered storm data, a relatively limited number of parameter combinations showed higher model sensitivity to different parameter sets as opposed to single storm data with the same parameter sets. Model sensitivity to different storm events was correlated with cumulative storm power and resultant erosion volume in comparison with other features in the datasets. The results are expected to guide the selection of an event-specific dataset with various morphological and hydrodynamic factors in an area model under complex bathymetry.
APA, Harvard, Vancouver, ISO, and other styles
19

Kostelijk, E. H., R. Fijnheer, H. K. Nieuwenhuis, C. W. N. Gouwerok, and D. de Korte. "Soluble P-selectin as Parameter for Platelet Activation during Storage." Thrombosis and Haemostasis 76, no. 06 (1996): 1086–89. http://dx.doi.org/10.1055/s-0038-1650710.

Full text
Abstract:
SummaryPlatelet concentrates stored at room temperature deteriorate. The so-called storage lesion is characterised by morphological changes and a loss of functionality. To find an assay for early platelet activation in platelet concentrates the morphological score, β-TG release and P-selectin expression were determined, and compared with the amount of soluble P-selectin. An ELISA was used to quantify soluble P-selectin in the storage medium. We found a significant correlation between the amount of soluble P-selectin and the percentage of P-selectin positive platelets (flow-cytometric analysis) (r = 0.7449; p <0.0001) or the amount of β-TG release (r = 0.6837; p<0.0001). The morphological score also correlated significantly (negative) with the amount of soluble P-selectin (r = -0.7669; p = 0.0002). From day 0 till day 8, the amount of soluble P-selectin increased constantly from 219 ± 49.2ng/ml to 556 ± 102.3 ng/ml. The detection of soluble P-selectin can be used to quantify activation of platelets during storage. The immuno-assay for soluble P-selectin is more sensitive than flow-cytometric analysis of the percentage of P-selectin-positive cells and allows earlier detection of platelet activation.
APA, Harvard, Vancouver, ISO, and other styles
20

De Luca, Federico, Marco De Petris, Gustavo Yepes, Weiguang Cui, Alexander Knebe, and Elena Rasia. "The Three Hundred project: dynamical state of galaxy clusters and morphology from multiwavelength synthetic maps." Monthly Notices of the Royal Astronomical Society 504, no. 4 (April 17, 2021): 5383–400. http://dx.doi.org/10.1093/mnras/stab1073.

Full text
Abstract:
ABSTRACT We study the connection between morphology and dynamical state of the simulated galaxy clusters in z ∈ [0, 1.031] from The Three Hundred project. We quantify cluster dynamical state using a combination of dynamical indicators from theoretical measures and compare this combined parameter, χ, with the results from morphological classifications. The dynamical state of the cluster sample shows a continuous distribution from dynamically relaxed, more abundant at lower redshift, to hybrid and disturbed. The dynamical state presents a clear dependence on the radius, with internal regions more relaxed than outskirts. The morphology from multiwavelength mock observation of clusters in X-ray, optical, and Sunyaev–Zel’dovich (SZ) effect images is quantified by M – a combination of six parameters for X-ray and SZ maps and the offsets between the optical position of the brightest cluster galaxy (BCG) and the X-ray/SZ centroids. All the morphological parameters are highly correlated with each other, while they show a moderately strong correlation with the dynamical χ parameter. The X-ray or SZ peaks are less affected by the dynamical state than centroids, which results in reliable tracers of the cluster density peak. The principal source of contamination in the relaxed cluster fraction, inferred from morphological parameters, is due to dynamically hybrid clusters. Compared to individual parameters, which consider only one aspect of cluster property (e.g. only clumping or asymmetry), the combined morphological and dynamical parameters (M and χ) collect more information and provide a single and more accurate estimation of the cluster dynamical state.
APA, Harvard, Vancouver, ISO, and other styles
21

Takeuchi, Hiroaki, Sota Yamamoto, Mari Oshima, Katsuyuki Hoshina, and Takafumi Akai. "2606 Fundamental study of morphological parameter for abdominal aortic aneurysm diagnosis." Proceedings of The Computational Mechanics Conference 2013.26 (2013): _2606–1_—_2606–3_. http://dx.doi.org/10.1299/jsmecmd.2013.26._2606-1_.

Full text
APA, Harvard, Vancouver, ISO, and other styles
22

Cui, Ling Zhi, Gao Min Li, Yi Ting He, Qin Liao, and Fei Luo. "Status Analysis of the Frozen Soil’s Dynamics Parameter Study." Advanced Materials Research 941-944 (June 2014): 2626–30. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.2626.

Full text
Abstract:
In this paper, the author points out several key problems needed to be solved about the dynamics of frozen soil by reviewing related literatures about hysteretic curve of frozen soil ,dynamic constitutive relation and dynamical parameter. The problems are the insufficient understanding on morphological characteristics of hysteretic curve and how to transform qualitative understanding into quantitative understanding about morphological characteristics of hysteretic curve. The problem is the rationality of selecting the dynamic constitutive model, namely how to establish the engineering applicable model which conforms to the actual soil mechanics performance.The problem is the rationality of the calculation method about dynamic elastic modulus and damping ratio, namely how to define dynamic modulus of elasticity of frozen soil correctly and the limitation of using the classical method to calculate the damping.
APA, Harvard, Vancouver, ISO, and other styles
23

Neyazi, Belal, Vanessa M. Swiatek, Martin Skalej, Oliver Beuing, Klaus-Peter Stein, Jörg Hattingen, Bernhard Preim, Philipp Berg, Sylvia Saalfeld, and I. Erol Sandalcioglu. "Rupture risk assessment for multiple intracranial aneurysms: why there is no need for dozens of clinical, morphological and hemodynamic parameters." Therapeutic Advances in Neurological Disorders 13 (January 2020): 175628642096615. http://dx.doi.org/10.1177/1756286420966159.

Full text
Abstract:
Introduction: A multitude of approaches have been postulated for assessing the risk of intracranial aneurysm rupture. However, the amount of potential predictive factors is not applicable in clinical practice and they are rejected in favor of the more practical PHASES score. For the subgroup of multiple intracranial aneurysms (MIAs), the PHASES score might severely underestimate the rupture risk, as only the aneurysm with the largest diameter is considered for risk evaluation. Methods: In this study, we investigated 38 patients harboring a total number of 87 MIAs with respect to their morphological and hemodynamical characteristics. For the determination of the best suited parameters regarding their predictive power for aneurysm rupture, we conducted three phases of statistical evaluation. The statistical analysis aimed to identify parameters that differ significantly between ruptured and unruptured aneurysms, show smallest possible correlations among each other and have a high impact on rupture risk prediction. Results: Significant differences between ruptured and unruptured aneurysms were found in 16 out of 49 parameters. The lowest correlation were found for gamma, aspect ratio (AR1), aneurysm maximal relative residence time (Aneurysm_RRT_max) and aneurysm mean relative residence time. The data-driven parameter selection yielded a significant correlation of only two parameters (AR1 and the Aneurysm_RRT_max) with rupture state (area under curve = 0.75). Conclusion: A high number of established morphological and hemodynamical parameters seem to have no or only low effect on prediction of aneurysm rupture in patients with MIAs. For best possible rupture risk assessment of patients with MIAs, only the morphological parameter AR1 and the hemodynamical parameter Aneurysm_RRT_max need to be included in the prediction model.
APA, Harvard, Vancouver, ISO, and other styles
24

Pandita, Hita, and Ani Apriani. "Biometric similarity Test of The Population of T. (Zaria) bantamensis tjicumpaensis with T. (Zaria) javana as a Form of Phylogeny And Evolutionary Proximity." Journal of Geoscience, Engineering, Environment, and Technology 6, no. 3 (September 22, 2021): 172–76. http://dx.doi.org/10.25299/jgeet.2021.6.3.6780.

Full text
Abstract:
Biometric aspects in the Turritellidae family need to be studied as an important identification parameter. Zaria, which is one of the sub genera in the Turritellidae family, deserves to be tested in order to determine the feasibility of the biometric aspect as an identification parameter. This paper aims to provide an overview of the benefits of the biometric aspect as an identification parameter. The method used to re-identify the biometric and morphological aspects of the T. (Zaria) bantamensis tjicumpaensis population with T. (Zaria) javana. The results of the identification were carried out by a T-Test on the biometric aspect to see the similarity of the biometric aspects of the two populations. Based on the results of the T-Test on the parameters of the Wsut: Wang and Wsut: L ratio, it shows that the two Zaria species are the same. Meanwhile, from the morphological aspect, there is a slight difference in the early growth peripherals.
APA, Harvard, Vancouver, ISO, and other styles
25

Fujimura, Soichiro, Hiroyuki Takao, Takashi Suzuki, Chihebeddine Dahmani, Toshihiro Ishibashi, Hiroya Mamori, Makoto Yamamoto, and Yuichi Murayama. "A new combined parameter predicts re-treatment for coil-embolized aneurysms: a computational fluid dynamics multivariable analysis study." Journal of NeuroInterventional Surgery 10, no. 8 (December 15, 2017): 791–96. http://dx.doi.org/10.1136/neurintsurg-2017-013433.

Full text
Abstract:
PurposeCoil embolization is a minimally invasive method used to treat cerebral aneurysms. Although this endovascular treatment has a high success rate, aneurysmal re-treatment due to recanalization remains a major problem of this method. The purpose of this study was to determine a combined parameter that can be useful for predicting aneurysmal re-treatment due to recanalization.MethodsPatient-specific geometries were used to retrospectively analyze the blood flow for 26 re-treated and 74 non-retreated aneurysms. Post-operatively aneurysms were evaluated at 12-month follow-up. The hemodynamic differences between the re-treatment and non-retreatment aneurysms were analyzed before and after coil embolization using computation fluid dynamics. Basic fluid characteristics, rates of change, morphological factors of aneurysms and patient-specific clinical information were examined. Multivariable analysis and logistic regression analysis were performed to determine a combined parameter—re-treatment predictor (RP).ResultsAmong examined hemodynamic, morphological, and clinical parameters, slight reduction of blood flow velocity rate in the aneurysm, slight increase of pressure rate at the aneurysmal neck and neck area, and hypertension were the main factors contributing to re-treatment. Notably, hemodynamic parameters between re-treatment and non-retreatment groups before embolization were similar: however, we observed significant differences between the groups in the post-embolization average velocity and the rate of reduction in this velocity in the aneurysmal dome.ConclusionsThe combined parameter, RP, which takes into consideration hemodynamic, morphological, and clinical parameters, accurately predicts aneurysm re-treatment. Calculation of RP before embolization may be able to predict the aneurysms that will require re-treatment.
APA, Harvard, Vancouver, ISO, and other styles
26

Maryenko, Nataliia, and Oleksandr Stepanenko. "FRACTAL DIMENSION IN MORPHOLOGY AND MEDICINE: THEORETICAL BASES AND PRACTICAL APPLICATION: review." Inter Collegas 8, no. 4 (May 22, 2022): 290–97. http://dx.doi.org/10.35339/ic.8.4.290-297.

Full text
Abstract:
Morphometry is an integral part of most modern morphological studies and the classic morphological morphometric methods and techniques are often borrowed for research in other fields of medicine. The majority of morphometric techniques are derived from Euclidean geometry. In the past decades, the principles, parameters and methods of fractal geometry are increasingly used in morphological studies. The basic parameter of fractal geometry is fractal dimension. Fractal dimension allows you to quantify the degree of filling of space with a certain geometric object and to characterize the complexity of its spatial configuration. There are many anatomical structures with complex irregular shapes that cannot be unambiguously and comprehensively characterized by methods and techniques of traditional geometry and traditional morphometry: irregular linear structures, irregular surfaces of various structures and pathological foci, structures with complex branched, tree-like, reticulated, cellular or porous structure, etc. Fractal dimension is a useful and informative morphometric parameter that can complement existing quantitative parameters to quantify objective characteristics of various anatomical structures and pathological foci. Fractal analysis can qualitatively complement existing morphometric methods and techniques and allow a comprehensive assessment of the spatial configuration complexity degree of irregular anatomical structures. The review describes the basic principles of Euclidean and fractal geometry and their application in morphology and medicine, importance and application of sizes and their derivatives, topological, metric and fractal dimensions, regular and irregular figures in morphology, and practical application of fractal dimension and fractal analysis in the morphological studies and clinical practice.
APA, Harvard, Vancouver, ISO, and other styles
27

Liu, Hong Wei, Yan Yang Liang, and Hui Zhang. "Research on the Rice Leaf Morphological Formation and its Visualization." Advanced Materials Research 201-203 (February 2011): 2504–8. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.2504.

Full text
Abstract:
This paper firstly summarizes the morphological characteristics of rice leaf through observation of the rice leaf growth process. And then the mathematical model of the rice leaf growing is established based on experimental data. In this model, the vectorization of rice leaf morphology and growth process is realized by only several explicit biological parameters. The visualization of the rice leaf growth process is realized in computer by technique of computer graphics and the combination of VC++ and OpenGL. The simulation results show that the proposed model can simulate the growth process of the rice leaf very well on the computer easily with less parameter.
APA, Harvard, Vancouver, ISO, and other styles
28

Du, Yi Hao, Si Yuan He, Meng Ke Huo, Ping Zhou, Qiang Chen, Ni Rong Bao, and Long Ba. "Relationship between Elastic Module and Porous Structure of Cancellous Bone." Materials Science Forum 933 (October 2018): 309–13. http://dx.doi.org/10.4028/www.scientific.net/msf.933.309.

Full text
Abstract:
Trabecular bone, widely presented in the ends of long bones and chine, is a typically porous structure which provides a multifunction such as light weight, undertaking load, impact energy buffer and hosting marrow cells. The structure of trabecular is a dominant factor for the strength of cancellous bone. The prediction of the trabecular bone’s mechanical properties depending on the trabecular structure is very useful for the diagnosis and treatment of osteoporosis. The object of this study is to establish a relationship between the mechanical properties and topological, morphological parameters of trabecular bone. The 50 3-D data of cancellous bone are selected from the CT images of three caput femurs and disposed in BoneJ, through which the BV/TV, SMI and genus parameters of each samples are obtained. The deformation behaviors of trabecular bone are simulated in ABAQUS through uniaxial compression on the 3-D model derived from stack images. Then linear-regression analyses are conducted on the BV/TV, genus, SMI and apparent Young’s modulus, resulting a high correlation (R^2=0.84) between the Young’s modulus and the hybrid parameter derived from SMI and normalized genus, corresponding to morphological and topological parameter of the samples respectively. The result indicates that it’s promising to establish the relationship between mechanical properties of trabecular bone and their topological and morphological parameters.
APA, Harvard, Vancouver, ISO, and other styles
29

Curty, Didier, François C. Cuisinier, and Carlos R. Rabaça. "Automated morphological classification of galaxies using wavelet transform." Proceedings of the International Astronomical Union 5, S262 (August 2009): 317–18. http://dx.doi.org/10.1017/s1743921310003029.

Full text
Abstract:
AbstractThe wavelet transform acts to segregate objects in function of their size. We apply this method on images of galaxies to decompose them into coefficients representing only objects of the same size. The total fluxes of the wavelet coefficients describe the cumulative power spectrum of spatial frequencies. Based on this spectrum, we propose a new parameter to quantify the galaxy texture. As expected, it remains small and quite invariant for early-type galaxies, while it covers a large range and takes larger values for late-type galaxies. Combined with a second parameter, our determination of the texture is able to successfully separate galaxy types. By thresholding the wavelet coefficients, we detect luminous lumps. In irregular galaxies, their radial distribution seems to show a double peak. This could be the trace of a privileged radial distance of strong star formation regions.
APA, Harvard, Vancouver, ISO, and other styles
30

Xu, Lei, Rui Shao, Honglei Li, and Liang Wang. "Diagnostic Value of Multi-Parameter MRI in Sub-Stage of T3 Rectal Cancer." Journal of Medical Imaging and Health Informatics 10, no. 11 (November 1, 2020): 2768–72. http://dx.doi.org/10.1166/jmihi.2020.3213.

Full text
Abstract:
The paper aims to explore the diagnostic value of multi-parameter MRI in sub-stage of T3 rectal cancer. According to the results of clear pathological evaluation, 52 patients were divided into T3I and T3II groups according to the maximum mesorectum depth of tumor infiltration. The χ2 test was used to compare the differences of the overall morphology index, morphological index of the extramural strips, type of time-signal intensity curve (TIC), and the location index of DWI diffusion-limited distribution between the two groups. The independent sample t was used to test and compare the differences in semi-quantitative parameters of DCE between the two lesion groups. The pathological results were used as the dependent variables, the indicators mentioned above with statistical differences were used as the independent variables, and a Logistic regression model was established to construct joint parameters and evaluate its diagnostic efficacy. The differences in the circumferential diameter of lesions and morphological index of extramural strips (p < 0.01), and DWI diffusion restricted distribution index (p < 0.01) of the two groups were statistically significant. The difference in the DCE semiquantitative parameter early enhancement ratio (EER) (p < 0.01) between the two groups. The maximum Youden index of a newly-constructed parameter diagnosis combination: circumferential diameter of lesions + extramural strips + distribution locations of limited diffusion on DWI + EER was 0.73, the area under receiver operating characteristic curve(ROC) was 0.887 and the diagnostic sensitivity and specificity were 85.24% and 87.34%. By making full use of multi-parameter information, combined with morphological index of extramural strips, circumferential diameter of lesions, EER and distribution locations of the diffusion-limited of DWI as evaluation indexes, it can provide a high diagnostic efficiency for the sub-stage of T3 rectal cancer.
APA, Harvard, Vancouver, ISO, and other styles
31

Pruzhinskaya, M. V., A. K. Novinskaya, N. Pauna, and P. Rosnet. "The dependence of Type Ia Supernovae salt2 light-curve parameters on host galaxy morphology." Monthly Notices of the Royal Astronomical Society 499, no. 4 (October 15, 2020): 5121–35. http://dx.doi.org/10.1093/mnras/staa3173.

Full text
Abstract:
ABSTRACT Type Ia Supernovae (SNe Ia) are widely used to measure distances in the Universe. Despite the recent progress achieved in SN Ia standardization, the Hubble diagram still shows some remaining intrinsic dispersion. The remaining scatter in supernova luminosity could be due to the environmental effects that are accounted for as mass step correction in the current cosmological analyses. In this work, we compare the local and global colour (U − V), the local star formation rate, and the host stellar mass to the host galaxy morphology. The observed trends suggest that the host galaxy morphology is a relevant parameter to characterize the SN Ia environment. Therefore, we study the influence of host galaxy morphology on light-curve parameters of SNe Ia from the pantheon cosmological supernova sample. We determine the Hubble morphological type of host galaxies for a subsample of 330 SNe Ia. We confirm that the salt2 stretch parameter x1 depends on the host morphology with the p-value ∼10−14. The supernovae with lower stretch value are hosted mainly by elliptical and lenticular galaxies. No correlation for the salt2 colour parameter c is found. We also examine Hubble diagram residuals for supernovae hosted by ‘early-type’ and ‘late-type’ morphological groups of galaxies. The analysis reveals that the mean distance modulus residual in early-type galaxies is smaller than the one in late-type galaxies, which means that early-type galaxies contain brighter supernovae after stretch and colour corrections. However, we do not observe any difference in the residual dispersion for these two morphological groups. The obtained results are in the line with other analyses showing environmental dependence of SN Ia light-curve parameters and luminosity. We confirm the importance of including a host galaxy parameter into the standardization procedure of SNe Ia for further cosmological studies.
APA, Harvard, Vancouver, ISO, and other styles
32

Vizilter, Yu V., O. V. Vygolov, S. Yu Zheltov, and V. V. Kniaz. "METRIC APPROACH TO SEMANTIC-MORPHOLOGICAL IMAGE COMPARISON." Vestnik komp'iuternykh i informatsionnykh tekhnologii, no. 191 (May 2020): 3–12. http://dx.doi.org/10.14489/vkit.2020.05.pp.003-012.

Full text
Abstract:
In this paper we propose and consider different metric approaches to image comparison based on Morpho-Semantic (MS) and Semantic-Morphological (SM) models. The first proposed class-based approach presumes the embedding of MS and SM models to the metric space with weighted Lp metrics. This approach is based on representation of SM models as mosaic vector functions composed of semantic-morphological class expression maps. The feature description of these maps provides a global feature description of SM models by SM vectors. The second proposed class-based approach is based on resource models, which include semantic-morphological class expression maps with area recourse values. This approach implements the embedding of these mosaic class expression maps with area recourse values to the metric space with Earth Mover’s Distance (EMD) based on resource transportation between these maps. Finally, we propose the object-based approach to metric embedding of SM models inspired by Geometrical Difference Distance (GDD), which performs the comparison of mosaic image shapes via weighted pairwise comparison of their region shapes. In this way we obtain the SM Difference Distance (SMDD) and its EMD-version (SMDD). The practical applicability of proposed SM-metrics is largely determined by the strategy of feature set forming and parameter estimation scheme. The SM-metrics parameter tuning for comparison of some visual scenes/objects could be performed both as MS-modeling (interpretation) of human subjective reasoning and as MS-modeling (interpretation) of deep learning results. In both cases, SM models and SM metrics fitting could allow: making partially transparent the human or DNN reasoning in scene comparison tasks; Comparing (grouping, clustering) different experts (algorithms) in terms of different parameters settings for SM-models; performing the personalized post-training of neural network models with taking into account the individual SM-settings of concrete users, operators or experts. This will combine the effectiveness of deep learning on huge training bases with partial transparency of reasoning and the possibility of directly taking into account the wishes of users in terms of SM-models, rather than by creating the artificial training bases via artificial augmentation.
APA, Harvard, Vancouver, ISO, and other styles
33

Vizilter, Yu V., O. V. Vygolov, S. Yu Zheltov, and V. V. Kniaz. "METRIC APPROACH TO SEMANTIC-MORPHOLOGICAL IMAGE COMPARISON." Vestnik komp'iuternykh i informatsionnykh tekhnologii, no. 191 (May 2020): 3–12. http://dx.doi.org/10.14489/vkit.2020.05.pp.003-012.

Full text
Abstract:
In this paper we propose and consider different metric approaches to image comparison based on Morpho-Semantic (MS) and Semantic-Morphological (SM) models. The first proposed class-based approach presumes the embedding of MS and SM models to the metric space with weighted Lp metrics. This approach is based on representation of SM models as mosaic vector functions composed of semantic-morphological class expression maps. The feature description of these maps provides a global feature description of SM models by SM vectors. The second proposed class-based approach is based on resource models, which include semantic-morphological class expression maps with area recourse values. This approach implements the embedding of these mosaic class expression maps with area recourse values to the metric space with Earth Mover’s Distance (EMD) based on resource transportation between these maps. Finally, we propose the object-based approach to metric embedding of SM models inspired by Geometrical Difference Distance (GDD), which performs the comparison of mosaic image shapes via weighted pairwise comparison of their region shapes. In this way we obtain the SM Difference Distance (SMDD) and its EMD-version (SMDD). The practical applicability of proposed SM-metrics is largely determined by the strategy of feature set forming and parameter estimation scheme. The SM-metrics parameter tuning for comparison of some visual scenes/objects could be performed both as MS-modeling (interpretation) of human subjective reasoning and as MS-modeling (interpretation) of deep learning results. In both cases, SM models and SM metrics fitting could allow: making partially transparent the human or DNN reasoning in scene comparison tasks; Comparing (grouping, clustering) different experts (algorithms) in terms of different parameters settings for SM-models; performing the personalized post-training of neural network models with taking into account the individual SM-settings of concrete users, operators or experts. This will combine the effectiveness of deep learning on huge training bases with partial transparency of reasoning and the possibility of directly taking into account the wishes of users in terms of SM-models, rather than by creating the artificial training bases via artificial augmentation.
APA, Harvard, Vancouver, ISO, and other styles
34

Sal’nikova, E. M., and L. M. Martyushev. "Determining the order parameter for the morphological analysis of two-dimensional structures." Technical Physics Letters 27, no. 4 (April 2001): 301–4. http://dx.doi.org/10.1134/1.1370207.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Dougherty, Edward R., and Eugene Kraus. "Morphological pseudoconvolutions: One-parameter families of derived filters with increased invariant classes." Circuits Systems and Signal Processing 11, no. 1 (March 1992): 195–228. http://dx.doi.org/10.1007/bf01189227.

Full text
APA, Harvard, Vancouver, ISO, and other styles
36

Vasiliu, Mihaela Păpușa, Liliana Sachelarie, Carmen Stadoleanu, Cătălina Gîrbea, and Agripina Zaharia. "Volumetric Change as a Parameter for the Accuracy of Impression Materials." Journal of Biomimetics, Biomaterials and Biomedical Engineering 36 (March 2018): 17–23. http://dx.doi.org/10.4028/www.scientific.net/jbbbe.36.17.

Full text
Abstract:
In this paper we studied the behavior of some impression materials such as alginate, condensation and addition silicones, considering the following parameters: the reproductive capacity of morphological details - dimensional stability - the ability to reproduce with accuracy the ratio between morphological elements. The essential conditions that an impression material should fulfill are plasticity, fidelity, flexibility, good mechanical strength, dimensional stability, suitable setting time and compatibility with materials from which the models are manufactured.The study results indicated that condensation silicones present the highest volumetric changes, their contraction being the result of the evaporation of volatile byproducts.The dimensional stability of fingerprint materials is one of the variables that contribute to the accuracy or inaccuracy of dental prostheses, other factors being represented by the changes occurring during the preparation of the fingerprint material as well as the fingerprinting techniques.
APA, Harvard, Vancouver, ISO, and other styles
37

Ruggiu, Dario, and Francesco Viola. "Linking Climate, Basin Morphology and Vegetation Characteristics to Fu’s Parameter in Data Poor Conditions." Water 11, no. 11 (November 7, 2019): 2333. http://dx.doi.org/10.3390/w11112333.

Full text
Abstract:
The prediction of long term water balance components is not a trivial issue, even when empirical Budyko’s type approaches are used, because parameter estimation is often hampered by missing or poor hydrological data. In order to overcome this issue, we provided regression equations that link climate, morphological, and vegetation parameters to Fu’s parameter. Climate is here defined as a specific seasonal pattern of potential evapotranspiration and rain: five climatic scenarios have been considered to mimic different conditions worldwide. A weather generator has been used to create stochastic time series for the related climatic scenario, which in turn has been used as an input to a conceptual hydrological model to obtain long-term water balance components with low computational effort, while preserving fundamental process descriptions. The morphology and vegetation’s role in determining water partitioning process has been epitomized in four parameters of the conceptual model. Numerical simulations explored a large set of basins in the five climates. Results show that climate superimposes partitioning rules for a given basin; morphological and vegetation watershed properties, as conceptualized by model parameters, determine the Fu’s parameter within a given climate. A sensitive analysis confirmed that vegetation has the most influencing role in determining water partitioning rules, followed by soil permeability. Finally, linear regressions relating basin characteristics to Fu’s parameter have been obtained in the five climates and tested in a basin for each case, obtaining encouraging results. The small amount of data required and the very low computational effort of the method make this approach ideal for practitioners and hydrologists involved in annual runoff assessment.
APA, Harvard, Vancouver, ISO, and other styles
38

Tanioka, Satoru, Fujimaro Ishida, Tomoyuki Kishimoto, Masanori Tsuji, Katsuhiro Tanaka, Shinichi Shimosaka, Mitsuru Toyoda, Nobuhisa Kashiwagi, Takanori Sano, and Hidenori Suzuki. "Quantification of hemodynamic irregularity using oscillatory velocity index in the associations with the rupture status of cerebral aneurysms." Journal of NeuroInterventional Surgery 11, no. 6 (January 22, 2019): 614–17. http://dx.doi.org/10.1136/neurintsurg-2018-014489.

Full text
Abstract:
BackgroundComplex and unstable flow patterns are reported to be associated with the rupture status of cerebral aneurysms, while their evaluation depends on qualitative analysis of streamlines of bloodflow. Oscillatory velocity index (OVI) is a hemodynamic parameter to quantify flow patterns. The aim of this study is to elucidate the associations between OVI and the rupture status of cerebral aneurysms.MethodsOne hundred and twenty-nine ruptured and unruptured cerebral aneurysms were analyzed with computational fluid dynamics under pulsatile flow conditions. With the use of median value of OVI, all aneurysms were divided into high and low OVI groups. Statistical analysis was performed to compare rupture status, and morphological and hemodynamic parameters between the two groups.ResultsThe median value of OVI was 0.006. High OVI was more likely observed in ruptured aneurysms (P=0.028) and associated with irregular shape, complex flow patterns, and unstable flow patterns (P<0.001, respectively). In morphological parameters, maximum size, aspect, projection, size, and volume-to-ostium area ratios were significantly higher in the high OVI group (P<0.001, respectively). In hemodynamic parameters, wall shear stress and wall shear stress gradient were significantly lower, and oscillatory shear index and gradient oscillatory number were significantly higher in the high OVI group (P<0.001, respectively).ConclusionHigh OVI was associated with rupture status, and morphological and hemodynamic characteristics of ruptured aneurysms. These results indicate that OVI may serve as a valuable hemodynamic parameter for diagnosing rupture status and risks of aneurysms.
APA, Harvard, Vancouver, ISO, and other styles
39

Das, Tamoghna, T. Lookman, and M. M. Bandi. "A minimal description of morphological hierarchy in two-dimensional aggregates." Soft Matter 11, no. 34 (2015): 6740–46. http://dx.doi.org/10.1039/c5sm01222h.

Full text
APA, Harvard, Vancouver, ISO, and other styles
40

Zhong, Yuxing, Akio K. Inoue, Satoshi Yamanaka, and Toru Yamada. "A Morphological Study of Galaxies Hosting Optical Variability-selected AGNs in the COSMOS Field." Astrophysical Journal 925, no. 2 (February 1, 2022): 157. http://dx.doi.org/10.3847/1538-4357/ac3edb.

Full text
Abstract:
Abstract Morphological studies are crucial to investigate the connections between active galactic nucleus (AGN) activities and the evolution of galaxies. Substantial studies have found that radiative-mode AGNs primarily reside in disk galaxies, questioning the merger-driven mechanism of AGN activities. In this study, through Sérsic profile fitting and nonparametric morphological parameter measurements, we investigated the morphology of host galaxies of 485 optical variability-selected low-luminosity AGNs at z ≲ 4.26 in the COSMOS field. We analyzed high-resolution images of the Hubble Space Telescope to measure these morphological parameters. We only successfully measured the morphological parameters for 76 objects and most AGN hosts (∼70%) were visually compact point-like sources. We examined the obtained morphological information as a function of redshift and compared them with literature data. We found that these AGN host galaxies showed no clear morphological preference. However, the merger rate increased with higher host star formation rate and AGN luminosity. Interestingly, we found ongoing star formation consistent with the typical star-forming populations in both elliptical and spiral galaxies, while these two types of galaxies were more symmetric than normal star-forming galaxies. These results suggest that optical variability-selected AGNs have higher probabilities to reside in elliptical galaxies than infrared-selected AGNs, whose host galaxies have a strong disk dominance, and support recent findings that the AGN feedback can enhance star-forming activities in host galaxies.
APA, Harvard, Vancouver, ISO, and other styles
41

Choi, Yong-Seok, Yo-Han Park, and Kong Joo Lee. "Building a Korean morphological analyzer using two Korean BERT models." PeerJ Computer Science 8 (May 2, 2022): e968. http://dx.doi.org/10.7717/peerj-cs.968.

Full text
Abstract:
A morphological analyzer plays an essential role in identifying functional suffixes of Korean words. The analyzer input and output differ from each other in their length and strings, which can be dealt with by an encoder-decoder architecture. We adopt a Transformer architecture, which is an encoder-decoder architecture with self-attention rather than a recurrent connection, to implement a Korean morphological analyzer. Bidirectional Encoder Representations from Transformers (BERT) is one of the most popular pretrained representation models; it can present an encoded sequence of input words, considering contextual information. We initialize both the Transformer encoder and decoder with two types of Korean BERT, one of which is pretrained with a raw corpus, and the other is pretrained with a morphologically analyzed dataset. Therefore, implementing a Korean morphological analyzer based on Transformer is a fine-tuning process with a relatively small corpus. A series of experiments proved that parameter initialization using pretrained models can alleviate the chronic problem of a lack of training data and reduce the time required for training. In addition, we can determine the number of layers required for the encoder and decoder to optimize the performance of a Korean morphological analyzer.
APA, Harvard, Vancouver, ISO, and other styles
42

Falah, Iffan Nadhif, Ratih Ida Adharini, and Susana Endah Ratnawati. "Molecular Identification of Elvers (<I>Anguilla</I> spp.) from River Estuaries in Central Java, Indonesia Using DNA Barcoding Based on <I>mt</I>DNA CO1 Sequences." Jurnal Ilmiah Perikanan dan Kelautan 15, no. 1 (January 27, 2023): 121–30. http://dx.doi.org/10.20473/jipk.v15i1.36416.

Full text
Abstract:
Highlight Research The elvers of Anguilla were identified through the morphological and molecular markers The result of morphological and molecular identification is different The molecular identification helps to confirm the morphological identification Based on this study molecular identification of the elvers of Anguilla found in river estuaries of Central Java is Anguilla bicolor bicolor Abstract An inventory of the presence and diversity of Anguilla spp. needs to be carried out as a basis for sustainable resource management. Conventional techniques based on morphological characteristics—are often less effective considering the morphological characteristics of Anguilla spp. are very identical and not so many can be observed, especially at the young eel stage. DNA-based molecular identification can be a way to determine diversity and phylogeny for conservation and inventory purposes. This research aimed to determine the diversity and phylogeny of Anguilla spp. obtained at the estuaries of Serayu River in Cilacap, Luk Ulo River in Kebumen, and Jali River in Purworejo in Central Java, Indonesia. A total of 10 samples were taken from each research location were analyzed morphologically, then it is known that there are 4 morphologically different samples at each research location so that a total of 12 samples were taken for molecular analysis. MEGA was used to construct the phylogenetic trees via Neighbour Joining (NJ) algorithms using the Kimura 2-parameter model with uniform rates and obtained by 1000 bootstraps replication. There are four species of Anguilla spp. identified morphologically, namely Anguilla bicolor bicolor, Anguilla bicolor pacifica, Anguilla obscura, and Anguilla australis. The species of Anguilla spp. that is molecularly identified is Anguilla bicolor bicolor with an identity percentage of > 98%. All samples are also known to be related to Anguilla bicolor bicolor identified in other countries.
APA, Harvard, Vancouver, ISO, and other styles
43

Camillo, Julcéia, Valentine Carpes Braga, Jean Kleber de Abreu Mattos, Ricardo Lopes, Raimundo Nonato Vieira da Cunha, Joseane Padilha, and Jonny Everson Scherwinski-Pereira. "Seed biometric parameters in oil palm accessions from a Brazilian germplasm bank." Pesquisa Agropecuária Brasileira 49, no. 8 (August 2014): 604–12. http://dx.doi.org/10.1590/s0100-204x2014000800004.

Full text
Abstract:
The objective of this work was to evaluate the morphological diversity of oil palm seeds and to cluster the accessions according to their morphological characteristics. Forty-one accessions from the oil palm germplasm bank of Embrapa Amazônia Ocidental were evaluated - 18 of Elaeis oleifera and 23 of E. guineensis. The groups were formed based on morphological characteristics, by principal component analysis. In E. oleifera, four groups were formed, tied to their region of origin, but with significant morphological differences between accessions from the same population. For tenera-type E. guineensis seeds, three widely divergent groups were formed, especially as to external parameters, which differentiated them from the other ones. The parameter endocarp thickness stood out in intra- and inter-population differentiation. For dura-type E. guineensis, three groups were formed, with larger seeds and thicker endocarps, which differed from all the other ones. The variability observed for seed characteristics in the analyzed accessions allows the establishment of different groups, to define strategies for genetic improvement.
APA, Harvard, Vancouver, ISO, and other styles
44

Zahradníková, M. "Attempt to define morphological parameters enabling sex determination of Ips typographus (Linaeus, 1758) (Coleoptera: Curculionidae: Scolytinae) using PCA and CLU." Journal of Forest Science 60, No. 10 (October 22, 2014): 401–5. http://dx.doi.org/10.17221/29/2014-jfs.

Full text
Abstract:
There are only two known methods for determining the sex of Ips typographus (L.) &ndash; dissection that can&shy;not be used with live beetles and by distinguishing between the density of the hairs on the head, a less reliable method that requires experienced personnel. As a result, we have sought to find a more reliable method of sex determination for I. typographus which can be used with live specimens but is still reliable and easy to conduct. The aim of the article is to explore the inner structure in data from measurements of morphological parameters of spruce bark beetles and to find correlations which could be used for sex determination. The number of beetles in our sample was 110, all from the first trapping of one pheromone trap. The statistical methods of principal components analysis (PCA) and cluster analysis (CLU) were used to support any correlation between the sex parameter and other morphological parameters (weight, elytra length, elytra width, pronotum length, pronotum width). As no correlation was found in the case of sex, we can claim that it is not possible to determine sex according to the examined morphological parameters. However, we have found an interesting inner structure in the data and it was confirmed that even weight is slightly correlated with other morphological parameters. &nbsp;
APA, Harvard, Vancouver, ISO, and other styles
45

Gao, Yongdao, Chang Cai, Qiaoan Yang, Wenxuan Quan, Chaochan Li, and Yanyou Wu. "Response of Bletilla striata to Drought: Effects on Biochemical and Physiological Parameter Also with Electric Measurements." Plants 11, no. 17 (September 4, 2022): 2313. http://dx.doi.org/10.3390/plants11172313.

Full text
Abstract:
In heterogeneous landscapes with temporary water deficit characteristics in southwestern China, understanding the electrophysiological and morphological characteristics of Bletilla striata under different water conditions can help to better evaluate its suitability for planting plants in specific locations and guide planting and production. Using B. striata seedlings as experimental materials, the maximum field capacity (FC) was 75–80% (CK: control group), 50–60% FC (LS: light drought stress), 40–45% FC (MS: moderate drought stress), and 30–35% FC (SS: severe drought stress). In terms of physiological response, the activities of peroxidase (POD) and catalase (CAT) decreased under drought conditions, but the activity was well under the LS treatment, and the contents of proline (Pro) and malondialdehyde (MDA) increased. In terms of morphological responses, under drought conditions, root lengths of the rhizomes (except the LS treatment) were significantly reduced, the leaf lengths were reduced, and the biomass was significantly reduced. The stomatal size reached the maximum under the LS treatment, and the stomatal density gradually decreased with the increase in drought degree. In terms of electrophysiological responses, drought significantly decreased the net photosynthetic rate (PN) of B. striata, stomatal conductance (gs), and transpiration rate (Tr), but effectively increased the water use efficiency (WUE). The effective thickness of leaves of B. striata increased under drought conditions, and drought promoted the formation of leaf morphological diversity. Our results showed that drought stress changed the physiological and morphological characteristics of B. striata, and under light drought conditions had higher physiological activity, good morphological characteristics, higher cellular metabolic energy and ecological adaptability. Appropriate drought can promote the improvement of the quality of B. striata, and it can be widely planted in mildly arid areas.
APA, Harvard, Vancouver, ISO, and other styles
46

Bobrysheva, I. V. "Morphological changes in the thymus of rats of reproductive period on the background of the immunosuppressant cyclophosphamide administration." Kazan medical journal 97, no. 4 (August 15, 2016): 578–85. http://dx.doi.org/10.17750/kmj2016-578.

Full text
Abstract:
Aim. To study the features of morphological changes of the thymus gland (thymus) of reproductive period rats amid the administration of the immunosuppressant cyclophosphamide.Methods. Thymus preparations were studied using an image analyzer based on CX-41 Olympus microscope. The morphological and functional areas of the thymus were determined relative areas (as a percentage) occupied by subcapsular, inner cortical zones of the cortex and thymic lobules medulla; cells distribution density, the percentage of cellular elements: lymphoblasts, small, medium and large lymphocytes, macrophages, mitotically dividing, destructively altered cells epithelioreticulocytes.Results. A statistically significant reduction in the relative area of subcapsular and inner cortical zones of the cortex, as well as an increase in this parameter in the thymic medullary parenchyma after 1-30 days after administration of cyclophosphamide were found. The cell density is reduced both in the cortex and in the medulla. Cytoarchitectonics of the thymus morphological and functional zones changes: a decrease in relative content of lymphocytes, mainly of young forms, as well as increase in the percentage of macrophages and destructively altered cells occurred. Maximum deviations of studied parameters was recorded after 1 and 7 days after drug administration. In 60 days after cytostatic administration morphometric characteristics of the thymus morphological and functional zones in laboratory rats do not have significant differences from the parameters in control animals of appropriate age.Conclusion. A single administration of cyclophosphamide leads to acute thymic involution, which is manifested in a decrease in the relative area of the cortex, lobules deformation, organ fatty degeneration, decrease in the relative content of lymphocytes, increase in the percentage of macrophages and destructively modified cells, which may be indicative of a high degree of reactivity of the animals thymus; results of the study may serve as morphologic evidence of the damaging effect of cyclophosphamide on the thymus lymphoid tissue.
APA, Harvard, Vancouver, ISO, and other styles
47

Arredondo-Valdez, Juan, Alejandro Isabel Luna-Maldonado, Ricardo David Valdez-Cepeda, Humberto Rodríguez-Fuentes, Juan Antonio Vidales-Contreras, Uziel Francisco Grajeda-González, and Héctor Flores-Breceda. "Characterization of Mature Paddles of Opuntia ficus-indica L. Using Morphological and Colorimetric Descriptors." Journal of Experimental Biology and Agricultural Sciences 10, no. 2 (April 30, 2022): 335–43. http://dx.doi.org/10.18006/2022.10(2).335.343.

Full text
Abstract:
Mexico is the world's leading producer of Opuntia ficus-indica. This kind of prickly pear is the most widespread and most commercially important cactus in Mexico. Morphological and colorimetric descriptors are among the most important agronomic traits because these parameters affect the yield, in such a way, the objective of the present research was to present a fast and reliable methodology to obtain the functional relationship in shape and color parameters of O. ficus indica cladodes, using a smartphone, a color meter, and open-access software. The acquisition and processing of images discovered interesting relationships between the Opuntia cladode's morphological characteristics, as well as colorimetric parameters of the cladodes. The non-linear data behaviors were fitted using deterministic models and CurveExpert software. Results of the study revealed that the best morphological descriptors were Circularity vs. Perimeter (r= 0.9815) and Aspect ratio vs. Roundness (r= 0.9999). In addition, mean values of the L*, C, and H color parameters were displayed in a window of a computer program online. It was found that the a-C relationship of the color parameters had the highest correlation coefficient (0.999). Therefore, it can be concluded that the morphological descriptors Circularity vs. Perimeter, Aspect Rate vs. Roundness, and a*-C color parameter can predict quickly and precisely the quality of O. ficus-indica.
APA, Harvard, Vancouver, ISO, and other styles
48

Zelinschi, Carmen Beatrice, Iuliana Stoica, and Dana Ortansa Dorohoi. "Changes in morphology and optical properties of polyvinyl alcohol foils induced by Congo red dye concentration and stretching degree." Journal of Polymer Engineering 34, no. 4 (June 1, 2014): 345–51. http://dx.doi.org/10.1515/polyeng-2013-0189.

Full text
Abstract:
Abstract To establish correlations between the optical and morphological properties of anisotropic polyvinyl alcohol (PVA) foils containing Congo red (CR) dye in various concentrations, characteristics such as degree of crystallinity, dichroic ratio, order parameter, birefringence, surface morphology, and three-dimensional texture parameters were estimated before and after stretching. An increase in morphological and optical anisotropy with the degree of stretching has been evidenced for both pure and CR-containing PVA foils, this behavior being facilitated by the presence of the dye. The study of these properties lays the foundation for understanding the circumstances in which PVA foils containing CR can be used as polarizing filters.
APA, Harvard, Vancouver, ISO, and other styles
49

Kim, Gye Hyeon, Eun Ae Shin, Je Young Jung, Jun Young Lee, and Chang Kee Lee. "Effect of Spray Parameters on Electrical Characteristics of Printed Layer by Morphological Study." Processes 10, no. 5 (May 18, 2022): 999. http://dx.doi.org/10.3390/pr10050999.

Full text
Abstract:
Products are manufactured as printed electronics through electro-conductive ink having properties suitable for flexible substrates. As printing process conditions affect the quality of the electronic properties of the final devices, it is essential to understand how the parameters of each process affect print quality. Spray printing, one of several printing processes, suits flexible large-area substrates and continuous processes with a uniform layer for electro-conductive aqueous ink. This study adopted the spray printing process for cellulose nanofiber (CNF)/carbon nanotube (CNT) composite conductive printing. Five spray parameters (nozzle diameter, spray speed, amount of sprayed ink, distance of nozzle to substrate, and nozzle pressure) were chosen to investigate the effects between process parameters and electrical properties relating to the morphology of the printing products. This study observed the controlling morphology through parameter adjustment and confirmed how it affects the final electrical conductivity. It means that the quality of the electronic properties can be modified by adjusting several spray process parameters.
APA, Harvard, Vancouver, ISO, and other styles
50

Ivanov, K. О. "A HOLE-FILLING ALGORITHM WITH PARAMETER ESTIMATION FOR MORPHOLOGICAL RECONSTRUCTION OF BINARY IMAGES." Computer Optics 39, no. 2 (January 1, 2015): 281–86. http://dx.doi.org/10.18287/0134-2452-2015-39-2-281-286.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the bibliographies on the topic 'Morphological Parameter' for other source types:
Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography