Summary:  of the object under study, and it is unclear to what extent the lacunarity estimates that these methods produce... lacunarities, compared with looking at the systems un- der study through the lens of multifractal measures, e... Influence of image resolution and evaluation algorithm on estimates of the ...

Source: Cornell University, Soil and Water Laboratory

Collection: Environmental Sciences and Ecology ; Geosciences

Summary:  . Background The following provides a brief overview of the aspects of lacunarity relevant to this study... . For the present study, as lacunarity responds to pattern scales in the imagery, only the crown size measurements... Lacunarity analysis to determine optimum extents for sample-based ...

Source: Carleton University, Geomatics and Landscape Ecology Research Laboratory

Collection: Environmental Sciences and Ecology ; Geosciences

Summary:  of lacunarity. Our studies show, that for textures with the same D q (generalized fractal dimension, discussed... 2 and koch3). Other studies show, that the lacunarity is a convenient measure of het­ erogeneity [6... measure lacunarity by the gliding box method. In this method the set ...

Source: Magiera, Andrzej - Instytut Fizyki, Uniwersytet Jagiellonski

Collection: Physics

Summary:  of characterizing spatial dispersion. Our present study shows that lacunarity can be used to quantify clustering... of the relationship between lacunarity and fracture connectivity deserves to be elucidated in future studies... Lacunarity analysis of fracture networks: Evidence for ...

Source: Hren, Michael - Department of Earth and Planetary Sciences, University of Tennessee

Collection: Geosciences

Summary:  plots of how total lacunarity varies in a studied area, it would be useful to map how the properties... lacunarity represents higher contagion (fewer but larger gaps; Plotnick et al., 1996). Recent studies... Analysis of lacunarity and scales of spatial homogeneity in IKONOS images of ...

Source: Malhi, Yadvinder - School of Geography and the Environment, University of Oxford

Collection: Environmental Sciences and Ecology

Summary:  in the Netherlands. A novel use of the lacunarity index to discern landscape function Nancy E. Mclntyre* & John A... Collins, CO 80523-1878, USA; *(Current address: Center for Environmental Studies, Box 873211 Arizona State... .mcintyre@asu.edu) Received 24 September ]998; Revised I April ]999; Accepted ]9 April ]999 Key words: ...

Source: McIntyre, Nancy E. - Department of Biological Sciences, Texas Tech University

Collection: Environmental Sciences and Ecology ; Biology and Medicine

Summary:  the fractal dimension and lacunarity is worthy of further study. In particular, the lacunarity functions may... dimension alone is not sufficient to describe the geometry and properties of "lacunar" fractals; another... parameter, which he termed lacunarity, is necessary. ...

Source: 

Collection: Environmental Sciences and Ecology

Summary:  Lacunarity, predictability and predictive instability of the daily pluviometric regime in the Iberian... of the Iberian Peninsula is analysed from the point of view of its lacunarity, predictability and predictive... as the number of consecutive days with rainfall amounts below one of these thresholds. The empirical lacunarity

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  percolation clusters, for example, are¡ of neutral lacunarity and will be studied elsewhere. Sev- eral' papers... . The notion of lacunarity is also beginning to play a central role in the study of diffusion... Le´vy dusts, Mittag-Leffler statistics, mass fractal lacunarity, and ...

Source: Blumenfeld, Rafi - Cavendish Laboratory, University of Cambridge

Collection: Physics ; Materials Science

Summary:  and lacunarity in the measurement of the texture of trabecular bone in clinical CT images Geoffrey Dougherty a... of the spectral density plots. Different natural textures were also readily distinguishable using lacunarity plots... in lacunarity plots, which indicated that a slice thickness of 1 mm or less is necessary if ...

Source: Dougherty, Geoff - Applied Physics Department, California State University Channel Islands

Collection: Physics

Summary:  Decrease in the osteocyte lacunar density accompanied by hypermineralized lacunar occlusion reveals... of the osteocyte lacunar distribution in the periosteal and endosteal human femoral cortexes of 16 female and 16... were taken to evaluate the osteocyte lacunar mineral composition and character- istics. Age

Source: Ritchie, Robert O. - Lawrence Berkeley National Laboratory

Collection: Materials Science

Summary:  and lacunar systems will be modeled and studied. Since the first objective of the current work is to com- pute... -005-8959-6 Modeling Deformation-Induced Fluid Flow in Cortical Bone's Canalicular­Lacunar System S. GURURAJA,1 H. J... , a lacunar­canalicular scale bone poroelasticity model is developed and ...

Source: Lakes, Roderic - Department of Engineering Physics, University of Wisconsin at Madison; Swan Jr., Colby Corson - Department of Civil and Environmental Engineering, University of Iowa

Collection: Engineering ; Materials Science

Summary:  within suburban areas. These indicators are weighted mean patch size and lacunarity computed from... .K. Weighted mean patch size and lacunarity values have also been investigated in subimages corresponding... ] and a number of studies have ex- amined the use of remote sensing in understanding urban land- scape form

Source: Jones, Graeme A. - School of Computing and Information Systems, Kingston University

Collection: Computer Technologies and Information Sciences

Summary:  relations, is used to study tile critical properties of the pure and diluted q-state anfiferromagnetic Potts... lacunarity carpets family. The pure model has phase transitions at finite temperatures and critical behaviour... studied in the non-trivial case provided by SC using various theoretical methods, including approximate

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  of imaging system MTF on lacunarity has not been fully addressed in studies to date. Clearly... spines [23]. Fractal signature and lacunarity may be useful in patient studies to provide an indication... fractal signature and lacunarity Geoffrey Dougherty * Faculty of Allied Health ...

Source: Dougherty, Geoff - Applied Physics Department, California State University Channel Islands

Collection: Physics

Summary:  2 . Preliminary studies of in vivo images from a clinical CT scanner indicate that lacunarity... the trabecular bone has a signifi- cant rod-like component [6,42]. Our study suggests that lacunarity, which... Lacunarity analysis of spatial pattern in CT images of vertebral trabecular bone ...

Source: Dougherty, Geoff - Applied Physics Department, California State University Channel Islands

Collection: Physics

Summary:  possible to extract new information from in situ hybridization studies. Lacunarity and fractality... , such as the area and the SD, which are considered in the present study. 2.3 Lacunarity Lacunarity was introduced... -dimensional gene expression patterns in embryonic development. ...

Source: Müller, Gerd B. - Department of Theoretical Biology, Fakultät für Lebenswissenschaften, Universität Wien

Collection: Biology and Medicine

Summary:  in detecting scale changes even when the density d is very small. In land degradation studies, lacunarity... September 2005 Available online 22 November 2005 Abstract This study assessed the ability of several models... was crust cover (q =0.52). Lacunarity analysis of the spatial patterns showed that the ...

Source: Loon, E. Emiel van - Instituut voor Biodiversiteit en Ecosysteem Dynamica, Universiteit van Amsterdam

Collection: Environmental Sciences and Ecology

Summary:  of lacunarity can be useful in determining functional grain. Spatially explicit, organism-centered studies... indicated a graded response from the fine to the coarse grain landscape. Lacunarity analysis of beetle... of integrating both behavioral and landscape approaches when studying searching behavior ...

Source: With, Kimberly A. - Division of Biology, Kansas State University

Collection: Environmental Sciences and Ecology

Summary:  UNCORRECTEDPROOF DTD 5 Identifying scales of pattern in ecological data: a comparison of lacunarity... that create them are ongoing challenges. We examined the utility of three techniques (lacunarity, spectral... of >450 m, corresponding to management activities on the study landscapes. For temperature across time, we

Source: Chen, Jiquan - Department of Environmental Sciences, University of Toledo

Collection: Environmental Sciences and Ecology

Summary:  Modeling Deformation-Induced Fluid Flow in the Lacunar- Canalicular System of Cortical Bone Colby C... -induced fluid flow in lacunar-canalicular system; · Magnitude of fluid pressures & shear stresses · Compare... pressures & stresses with those known to stimulate osteocyte response in in vitro cell culture studies

Source: Swan Jr., Colby Corson - Department of Civil and Environmental Engineering, University of Iowa

Collection: Engineering

Summary:  monoclonal antibody, mAb FasII (Developmental Studies Hybridoma Bank, Ames, IA, #1D4) at a dilution of 1... . Lacunarity analysis was adopted and modified from Plot- nick et al. (1996). Branch reconstruction... approaches, such as lacunarity and Voronoi tessel- lation, can reveal further aspects of the spatial

Source: Condron, Barry - Department of Biology, University of Virginia

Collection: Biology and Medicine

Summary:  of never before appreciated internal structures, namely passages con- necting the lacunar spaces within... tesserae. These intratesseral ÔcanaliculiÕ link consecutive lacunar spaces into long lacunar strings... and also make morphological study difficult. Every size scale is characterized by a distinct

Source: Summers, Adam P. - Friday Harbor Laboratories, University of Washington at Seattle

Collection: Environmental Sciences and Ecology

Summary:  distribution. This is especially true for ecological studies where relative positioning of sessile organisms... immediately surrounding a point and then shows distinctive peaks at 4 unit intervals. d Lacunarity measures... immediately surrounding each point. The opposite is expected for clustered points. Lacunarity ...

Source: Condron, Barry - Department of Biology, University of Virginia

Collection: Biology and Medicine

Summary:  Vol. 40 (2009) ACTA PHYSICA POLONICA B No 5 ON THE RELATION BETWEEN LACUNARITY AND FRACTAL... and lacunarity. Commenting the known results, I propose a method for estimation of the scaling constant... for lacunarity and fractal dimension. PACS numbers: 05.45.Df, 64.60.al 1. Introduction Lacunarity is a ...

Source: Magiera, Andrzej - Instytut Fizyki, Uniwersytet Jagiellonski

Collection: Physics

Summary:  The goal of this study is to investigate the efficacy of automated classification algorithms... for differentiating between disease subtypes, using multi-fractal spectra, lacunarity and integrated density measures... is a useful tool in neuropathology that can be applied to the study of other central nervous system diseases

Source: Teich, Malvin C. - Departments of Biomedical Engineering & Electrical and Computer Engineering, Boston University

Collection: Biology and Medicine

Summary:  Submitted to Phys. Lett. A (May 1999) Lacunarity and Period-doubling Paul Glendinninga and Leonard... of self-similar fractal sets, the lacunarity of the set is reflected in the oscil- lation due to . Scaling... -similar sets, lacunarity describes the way in which voids or lacunae are distributed at all scales

Source: Glendinning, Paul - Department of Mathematics, University of Manchester Institute of Science and Technology

Collection: Mathematics

Summary:  Poroelastic Modeling of Fluid Flow at the Haversian and Lacunar Scales Colby C. Swan, Ph... bone specimen Osteonal unit cell Canalicular/lacunar network Bone mineral matrix Hierarchical Structure... of Whole Bone Unit cell of bone matrix Osteons and cement lines Canalicular/lacunar unit cell Canaliculus

Source: Swan Jr., Colby Corson - Department of Civil and Environmental Engineering, University of Iowa

Collection: Engineering

Summary:  Volume 114A, number 8,9 PHYSICS LETTERS 17 March 1986 LACUNARITY AND INTERMITI'ENCY IN FLUID... TURBULENCE ":~ L.A. SMITH 1 NASA Goddard Space Flight Center, Institute for Space Studies, New York, NY 10025... . Such oscillationsare a feature of the lacunarity of fractal sets. Introduction. The fine structure of intermittent

Source: Goddard Institute for Space Studies (NASA)

Collection: Environmental Sciences and Ecology ; Geosciences

Summary:  the results in a visual way. Two landscape metrics were selected for the evaluation: a Lacunarity metric... Terms--Urban planning, Landscape Metrics, Lacunarity, Sustainable development I. INTRODUCTION rban... of the technology in the area of planning policy and decisions. Use of Lacunarity index to characterize sub- urban

Source: Jones, Graeme A. - School of Computing and Information Systems, Kingston University

Collection: Computer Technologies and Information Sciences

Summary:  ecological processes. Recent studies have used increasingly complex neutral models that incorporate contagion... ) consistent with fractal scaling. Introduction Landscape ecology is the study of the reciprocal inter- action... There are a number of potential uses for neutral mod- els in the study of landscapes. First, neutral ...

Source: Keitt, Timothy H. - Section for Integrative Biology, Division of Biological Sciences, University of Texas at Austin

Collection: Environmental Sciences and Ecology

Summary:  lacunar aud impurity sites iuduces the broadening of trie donor level into a narrow band. It is shown... and the energy values involved in the electronic transfers. A possible approach is to study the behaviour... be deduced from this study. TO this end, measurements of the electrical conductivity a and thermoelectrical

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  Posture-Dependent Hyperpolarized 3He MRI of Human Lung Function R. Scheidegger1 , L.L. Tsai1,2,3, R... University, Physics Department. 5Brigham and Women's Hospital Hyperpolarized 3He MRI Conventional 1H MRI... , allowing 3He ...

Source: Lukin, Mikhail - Department of Physics, Harvard University

Collection: Materials Science ; Physics

Summary:  - iation was selected to represent the range of landscape fragmentation in the study region. 2. Lacunarity... .J. King* Department of Geography and Environmental Studies, Carleton University, 1125 Colonel By Drive... metrics, General linear model, Ice storm, Lacunarity, Landscape extent, Temperate forest ...

Source: Carleton University, Geomatics and Landscape Ecology Research Laboratory

Collection: Environmental Sciences and Ecology ; Geosciences

Summary:  , and concentration threshold of the iso-surfaces. Finally, the lacunarity of the iso-surface structure shows... noise control. The objective of the current study is to characterize interfacial surfaces of high... and concentration threshold. Table 1 summarizes these studies, including the specific fractal dimension observations

Source: Webster, Donald - School of Civil and Environmental Engineering, Georgia Institute of Technology

Collection: Environmental Sciences and Ecology ; Engineering

Summary:  diseases. Emphysema studies with 3 He MRI The PHIL multicentre clinical trial, after upgrading the hardware... of patients with the 3 He MRI method and with conventional techniques: pulmonary function tests, High... map of gas distribution in the ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  or follow-up of lung diseases. Emphysema studies with 3 He MRI The PHIL multicentre clinical trial, after... of patients with the 3 He MRI method and with conventional techniques: pulmonary function tests, High... -constructing a 3D map of gas ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  features of a measure µ in terms of the µ(I a n) is a multifractal analogue of studying the fractality... of a set F in terms of the |In|. We show that, under a certain `lacunarity' condition, the (q) function... intervals In. This was studied by Guido and Isola [11­13], who showed that the Minkowski dimension of F

Source: Falconer, Kenneth - School of Mathematics and Statistics, University of St Andrews

Collection: Mathematics

Summary:  matter integrity. The purpose of this study was to determine if there were differences in MTR of WMSH... with SIVD and 16 control subjects of comparable age and sex were studied. MTR images were coregistered to MR... images segmented into tissue classes (gray matter, white matter, CSF, WMSH, and lacunar infarcts). MTR

Source: California at Davis, University of - Department of Neurology, Center for Neuroscience

Collection: Computer Technologies and Information Sciences ; Biology and Medicine

Summary:  Anisotropy, lacunarity, and upscaled conductivity and its autocovariance in multiscale random... us to account, in a straightforward manner, for lacunarity due to gaps in the multiscale hierarchy... ). We explore mathematically and graphically the effects that anisotropy and lacunarity have

Source: Tartakovsky, Daniel M. - Theoretical Division, Los Alamos National Laboratory

Collection: Mathematics

Summary:  effectively studied and understood individually and collec- tively. Scaling, on the other hand, is usually... on the spatial dimension of the very object they study, they do #12;Geographic Information Sciences Vol. 6, No. 1... ecology is simply the study of the relationship between spatial pattern and ecological processes over

Source: Wu, Jianguo "Jingle" - Department of Life Sciences, Arizona State University

Collection: Environmental Sciences and Ecology

Summary:  that the lacunarity in the projection can be arbitrarily small. Further characteristics of the projected set... statements about lacunarity and apparent projections can be reconciled. The distribution of galaxies... probably influence the galaxy distribution, which complicates the analysis. In this Letter, we study some

Source: Eckmann, Jean-Pierre - Département de Physique Théorique & Section de Mathématiques, Université de Genève

Collection: Physics ; Mathematics

Summary:  Studies (SISSA) ­ TriesteInternational School for Advanced Studies (SISSA) ­ Trieste A NEW ALGORITHM... learning program. Objective Aim of the study was to develop a prediction algorithm to support diagnostic... %); vertebrobasilar-territory TIA: probable POCS, and systolic blood pressure>157mm/Hg (probability=37,5%); ...

Source: Innocente, Roberto - Scuola Internazionale Superiore di Studi Avanzati (SISSA)

Collection: Computer Technologies and Information Sciences

Summary:  structure exhibited a threshold in lacunarity (a measure of interpatch dis- tances) below 20% habitat... impacts to native insect communities. Our study demonstrates that. in addition to economic thresholds... . Experimental model landscape system created to study the effect of landscape structure on predator-prey inter

Source: With, Kimberly A. - Division of Biology, Kansas State University

Collection: Environmental Sciences and Ecology

Summary:  of Lacunarity, and the Renormalization Group R. C. Ball,1 G. Caldarelli,2,3 and A. Flammini1,2 1 Department... of lacunarity in fractals, in terms of a symmetry reduction of the three point correlation function... that the lacunarity reveals much of the renormalization group in real space. This is supported by exact calculations

Source: Caldarelli, Guido - Dipartimento di Fisica, Università di Roma "La Sapienza"

Collection: Physics ; Materials Science

Summary:  . This method is then applied in a case study on diversity of breeding birds and butterflies in fragmented Dutch... . The few available studies by Holling (1992) and Brown and Maurer (1989) indeed conclude that this may... be an appropriate view, mainly from studying patterns in body sizes of species assemblages across spatial ...

Source: Minnesota, University of - Cedar Creek Natural History Area

Collection: Environmental Sciences and Ecology

Summary:  that the lacunarity in the projection can be arbitrarily small. Further characteristics of the projected set|in par... statements about lacunarity and apparent projections can be reconciled. PACS: 98.62, 05.20, 02... in uence the galaxy distribution, which complicates the analysis. In this Letter, we study some

Source: Durrer, Ruth - Département de PhysiqueThéorique, Université de Genève

Collection: Physics

Summary:  .ncsa.uiuc.edu/Visualization/Alpha-shape/. [2] C. Allain and M. Cloitre. Characterizing the lacunarity of random and deterministic fractal sets... fractal lacunarity, and perceived dimension. Physical Review E, 56:112­118, 1997. [6] M. Brady, J... numbers via combinatorial Laplacians. Algorithmica, 21:331­346, 1998. [27] C. Froeschl´e. Numerical ...

Source: Robins, Vanessa - Department of Applied Mathematics, Australian National University

Collection: Mathematics

Summary:  transport and nutrient availability. However, few studies have investigated anomalous diffusion... were used to generate random pore networks with varying porosity (f) and lacunarity (L). The objectives... a few studies have investigated this phenomenon in natural porous media. Anderson et al. [1996, 2000

Source: Hren, Michael - Department of Earth and Planetary Sciences, University of Tennessee; Perfect, Ed - Department of Earth and Planetary Sciences, University of Tennessee

Collection: Environmental Management and Restoration Technologies ; Geosciences

Summary:  TERRITORY INFARCT STENOSIS 30-69% 1 case Top p: 1.0 LACUNAR SYNDROME NORMAL 1 case Top p: 1... Top p: 0.899 right_systolic_pressure? >4.385 60 cases Top p: 0.959 LACUNAR SYNDROME >152.5 49 cases... Top p: 0.636 glycemia? <152.5 11 cases Top p: 1.0 LACUNAR SYNDROME >100.0 7 cases Top p: 1.0 CAROTID

Source: Innocente, Roberto - Scuola Internazionale Superiore di Studi Avanzati (SISSA)

Collection: Computer Technologies and Information Sciences

Summary:  . A function on N which is almost always 0 is called lacunary, and the modern study of lacunary q-series has... (n1+1) (q; q)nk-nk-1 ...(q; q)n2-n1 . The lacunarity of each series in Theorem 1 and almost every... that there is little hope of finding a combinatorial explanation for their lacunarity. This property arises instead

Source: Fondements et Applications, Université Paris 7 - Denis Diderot

Collection: Mathematics ; Computer Technologies and Information Sciences

Summary:  , and some experimental studies have been conducted to find some universality in the fractal dimension (or... on the fractal properties of fracture, one can see that most studies are experi- mential. An important point... studies on the mechanical consequences of fractality of cracks (see [12,13,15,21,27,49­53,130­ 135

Source: Northwestern University, Robert R. McCormick School of Engineering and Applied Science, Infrastructure Technology Institute

Collection: Engineering

Summary:  studies, the present results show that the structural trans- formation which occurs between a brucite type... in the case of the widely studied decompositions of brucite type hydroxides. Experimental. - In the present... study, cadmium hydroxide was used preferably to other isotypic hydroxides of brucite owing to its low

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  of the importance of the spatial components of the phenomena they study, and increas- ingly sophisticated... and Legendre 1998, Liebhold and Gurevitch 2002). Partly because the study of spatial structure has arisen more... placed in the study area. Processes such as growth and reproduction generate spatial auto- correlation

Source: Fortin, Marie Josee - Department of Ecology and Evolutionary Biology, University of Toronto; Legendre, Pierre - Département des Sciences Biologiques, Université de Montréal; Perry, Joe N. - Plant and Invertebrate Ecology Division, Rothamsted Experimental Station; Rosenberg, Michael S. - School of Life Sciences, Arizona State University

Collection: Environmental Sciences and Ecology

Summary:  shown by histology. Conclusion: This is the first study to show that hyperpolarized 3 He MRI can detect... , but this is the first study in which hyperpolarized 3 He MRI and measurement of helium ADC have been used to detect... ...

Source: Duke University, Center for In Vivo Microscopy

Collection: Biology and Medicine

Summary:  of flow and transport in porous media such as soils and reservoir rocks. In this study, geometric... porosity values employed in the present study. Keywords 3D fractal porous medium · Lattice Boltzmann model... knowledge, no studies have yet been published on the percolation thresholds of 3D prefractal porous media

Source: Hren, Michael - Department of Earth and Planetary Sciences, University of Tennessee

Collection: Geosciences

Summary:  -Dependent Pulmonary Oxygen Mapping with 3He MRI at Very-Low-Field 2 4 6 8 10 12 14 7 8 9 10 Experiment Time, t (s... system (Fig. 2) was optimized to operate at B0 = 6.5 mT applied field, allowing 3He MRI at 210 k... -hold for pAO2 calculation.Fig. 3: 3He Polarizer ...

Source: Lukin, Mikhail - Department of Physics, Harvard University

Collection: Materials Science ; Physics

Summary:  Volume 133, number 4,5 PHYSICS LETTERS A 14 November 1988 LACUNARITY IN A BEST ESTIMATOR OF FRACTAL... a discrete set of points is shownto be sensitive to lacunarity in the fractal set. 1. Introduction... to "intrinsic oscillations" or "lacunarity" [4--8], Here "*" denotes the cardinality of the set. which

Source: Theiler, James - Nonproliferation and International Security Division, Los Alamos National Laboratory

Collection: Computer Technologies and Information Sciences

Summary:  the lacunarity of such a set can be studied. 20 #12; References [BF92] T. Bedford and A.M. Fisher. Analogues... every x. We also determine the lacunarity distributions of the intersection local times. Our results... local time, Palm distribution, average density, lacunarity distribution, density distribution

Source: Burton, Geoffrey R. - Department of Mathematical Sciences, University of Bath

Collection: Mathematics

Summary:  these studies emphasize the usefulness of fractal parameters in tumor pathology. Such parameters are especially... segmentation were minimized. The resulting binary 1 Parts of this study were presented at the 82nd Meeting... dimension can be determined as the slope of a double-logarithmic plot of N( ) over . In our study 300 ...

Source: Svozil, Karl - Institut für Theoretische Physik, Technische Universität Wien

Collection: Physics

Summary:  of the objects we study have fractal structure. Fractals often exhibit growth in the number of connected... as helpful colleagues. My studies were funded by Liz Bradley's NSF National Young Investigator award #CCR... approximation to it. The motivation for this work comes from the study of chaotic dynamical systems

Source: Robins, Vanessa - Department of Applied Mathematics, Australian National University

Collection: Mathematics

Summary:  , allowing 3He MRI at 210 kHz. · Excitation flip angles were calibrated precisely using phantoms. Fig. 3: 3He... a single breath-hold for pAO2 calculation from the 3He MRI signal decay (Fig. 4). Introduction Regional... studies by West et al. ...

Source: Lukin, Mikhail - Department of Physics, Harvard University

Collection: Materials Science ; Physics

Summary:  prop- erties of plant spatial distributions, such as those recorded in field studies (Mladenoff et al... /CNRS #12;processes are acted out upon a fractal stage. Many recent spatially-explicit studies use fractal... of the study area. Different methodological issues arise at very fine scales of analysis and impose a minimum

Source: Hartley, Stephen - School of Biological Sciences, Victoria University of Wellington

Collection: Environmental Sciences and Ecology

Summary:  in optical pumping (1, 2) have made laser-polarized 3 He MRI a powerful method of ex- ploring pulmonary... ;laser-polarized 3 He MRI can be performed at applied magnetic fields substantially lower than... B0 homogeneity. We have exploited the ability to perform laser- ...

Source: Walsworth, Ronald L. - Department of Physics, Harvard University

Collection: Physics

Summary:  during the spread of eruptive and invasive species demands greater study, as it could lead to improved... to solve for p(h, ). As a scale-dependent measure, Allain & Cloitre (1992) defined the lacunarity... again the lacunarity-based definition of p, when h << 1, the equation can be approximated as: eqn 6

Source: He, Fangliang - Department of Renewable Resources, University of Alberta

Collection: Environmental Sciences and Ecology ; Biology and Medicine

Summary:  soil attribute that should be studied (Burrough et al., 1994). Geostatistical methods and, more... approaches is required to study multi- scale features that are the product of coexistence, hierarchy... ., 2002) for studying the critical zone. Such methodologies may help to identify typologies of system

Source: Hren, Michael - Department of Earth and Planetary Sciences, University of Tennessee; Perfect, Ed - Department of Earth and Planetary Sciences, University of Tennessee

Collection: Environmental Management and Restoration Technologies ; Geosciences

Summary:  dynamics relates to simple invasion model. The fractal dimension and lacunarity of three fire scars... growth model, the model of percolation [3]. Percolation has been extensively studied, and it proved... corresponds to an area of 900 m2 . cluster) [3], along with the lacunarity (i.e. the void distribution inside

Source: Caldarelli, Guido - Dipartimento di Fisica, Università di Roma "La Sapienza"; Gabrielli, Andrea - Dipartimento di Fisica, Università di Roma "La Sapienza"

Collection: Materials Science ; Physics

Summary:  posture dependent studies on the same day, or ventilation imaging from successive breaths of 3 He. MRI... , affect the lung structure modestly in a way that can nonetheless be clearly probed by 3 He MRI [15... of hyperpolarized ...

Source: Rosen, Matthew S - NMR Athinoula A. Martinos Center, Massachusetts General Hospital, Harvard University; Walsworth, Ronald L. - Department of Physics, Harvard University

Collection: Biology and Medicine ; Physics

Summary:  to gravity; however, the conventional high-field magnets used for most laser-polarized 3 He MRI of the human... changes affect the lung physiology in a way that can be clearly probed by 3 He MRI (14­16), only minimal... -polarized 3 ...

Source: Walsworth, Ronald L. - Department of Physics, Harvard University

Collection: Physics

Summary:  in the development and application of fractal models. In one of the earliest studies, Avnir and coworkers (Avnir et... two- and three- dimensional pore fractal and lacunarity analyses to relate solute tracer patterns... . (2009) used solute breakthrough curve data from previously published column studies to evaluate

Source: Hren, Michael - Department of Earth and Planetary Sciences, University of Tennessee; Perfect, Ed - Department of Earth and Planetary Sciences, University of Tennessee

Collection: Environmental Management and Restoration Technologies ; Geosciences

Summary:  SCI group. Thus this study confirmed the investigators' pre- dictions of dissociation between strength... descending pathways. This study also raises the important prob- lem of how to evaluate motor learning... relatively few studies have examined the effect of brain or spi- nal injury on motor learning itself.6

Source: Columbia University, Department of Neurology, Motor Performance Laboratory

Collection: Biology and Medicine

Summary:  , we identified an infarct without a priori knowledge that the lesion existed. The lacunar size... in the study and takes responsibility for the integrity of the data and the accu- racy of the data analysis... . Study con- cept and design: Kreisl, Fujita, Pike, Innis, and McArthur. Acquisition of data: Kreisl, Mbeo

Source: Innis, Robert B. - Molecular Imaging Branch, National Institute of Mental Health

Collection: Biology and Medicine

Summary:  , we identified an infarct without a priori knowledge that the lesion existed. The lacunar size... in the study and takes responsibility for the integrity of the data and the accu- racy of the data analysis... . Study con- cept and design: Kreisl, Fujita, Pike, Innis, and McArthur. Acquisition of data: Kreisl, Mbeo

Source: Pike, Victor W. - Molecular Imaging Branch, National Institute of Mental Health

Collection: Biology and Medicine

Summary:  studied two different glasses marked off BVA and BVH. Both glasses are used as coating of titanium alloy... prostheses (Ti6Al4V). Several methods have been performed in these studies such as nuclear and physico... -thin sections of about 100 nm with a diamond ultra-microtome. Bony tissues and coating are also studied

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  superiority of the proposed method · In a case study of lifting task with control subjects and with a teenager... command. · The results of this study clearly indicating lack of predictive control in the CP subject... and lift task is in concert with recent studies observing the grip and load force rates (e.g., Raghavan et

Source: Karniel, Amir - Department of Biomedical Engineering, Ben-Gurion University

Collection: Engineering ; Biology and Medicine

Summary:  9, 2008. Study received Tulane University animal care and use committee approval. * Correspondence... .6 Obara et al documented P2Y1 receptor expres- sion in endothelial cells that line the lacunar... Studies The rats were anesthetized with pentobarbital (50 mg/kg intraperitoneally). The trachea

Source: Burnstock, Geoffrey - Autonomic Neuroscience Centre, University College London

Collection: Biology and Medicine

Summary:  the extremely large numbers of iterates needed for the conver- gence of the algorithms. We study quantitatively... in lacunar fractal sets. These oscillations are the causeofprevious underestimatesofthe Renyidimensions... been to the study of fractal objects [11. An increasing used extensively to analyze small experimental

Source: 

Collection: Physics

Summary:  . Further, we study empirical methods for estimating the hyperparameters of the model, which lead to a fully... or data traffic [RCRB99]. A way to study these functions is the 1 #12;multifractal analysis first... ) are realizations of random variables drawn according to a lacunar random model ( has some specific regularity

Source: Loubes, Jean-Michel - Institut de Mathématiques de Toulouse, Université Paul Sabatier

Collection: Mathematics

Summary:  for the Study of Reproduction, Inc. ISSN: 0006-3363. http://www.biolreprod.org the Y-chromosome-linked SRY gene... )-linked genes occurs in birds [5]. However, results of recent studies of a larger number of Z-linked genes... ]. In the present study, we examined the effects of aromatase inhibition and female-to-male sex reversal

Source: McQueen, Heather - School of Biological Sciences, University of Edinburgh

Collection: Biology and Medicine

Summary:  the lacunarity of a fractal pattern (roughly speaking, the size distribution of `holes' within it); more recently... lacunarity has been described as a function of scale, not as a single number, and used as a general pattern... ) where Rmax is the total number of species in entire study area and A is area (see Appendix 1 for full

Source: Hartley, Stephen - School of Biological Sciences, Victoria University of Wellington

Collection: Environmental Sciences and Ecology

Summary:  the crossscale rainfall pdfs in terms of the nonextensivity parameter q, a lacunarity (intermittency) correction... of the pdfs was studied using the socalled propagator kernel, relating variations of velocity incre- ments... scale of the forcing. The g = 2 - q (also empirically obtained for turbulence) is a lacunarity

Source: Katul, Gabriel - Nicholas School of the Environment and Earth Sciences, Duke University

Collection: Environmental Sciences and Ecology

Summary:  in a way that can nonetheless be clearly probed by 3He MRI (25,30,31). However, only minimal subject... of hyperpolarized 3He MRI are not realized for many of the most needy patients. An open-access, lightweight... of hyperpolarized ...

Source: Rosen, Matthew S - NMR Athinoula A. Martinos Center, Massachusetts General Hospital, Harvard University; Walsworth, Ronald L. - Department of Physics, Harvard University

Collection: Biology and Medicine ; Physics

Summary:  in the landscape has not been studied explicitly. In this paper, we exam- ine the consequences of the large... showing the boundaries of the subalpine plateau (shaded) and the locations of the 12 study areas (shown... classificaatio of burn severih Burn severity was characterized in the field in 12 study areas established across

Source: Turner, Monica G. - Department of Zoology, University of Wisconsin at Madison

Collection: Environmental Sciences and Ecology ; Biology and Medicine

Summary:  A was introduced to allow for varying degreesof "lacunarity" [Mandelbrot, 1982]. Although this concept needs... mathematical development, the basicidea is straightforward. As the term suggests, a highly lacunar fractal... is characterized by large lacunar (empty) regions. When A= 1, the cylindershave circular bases,and simulated ...

Source: Lovejoy, Shaun - Physics Department, McGill University

Collection: Physics

Summary:  of permeability imaging to diseases associated with subtle blood-brain barrier breakdown, in particular lacunar

Source: Edinburgh, University of - Division of Informatics, Institute for Adaptive and Neural Computation

Collection: Computer Technologies and Information Sciences

Summary:  related to the use of these methods are summarized. Results from empirical studies applying fractal... been used to study the scaling behaviour of geographic features and the knowledge generated... have their theoretical and/or practical limitations. Several studies (Roy et al. 1987, Tate 1998, Lam

Source: Liang, Shunlin - Department of Geography, University of Maryland at College Park

Collection: Geosciences

Summary:  ............................................................3 Solute Transport of the Bone Lacunar-Canalicular System... , physical therapy, health, nursing and exercise science, and fashion and apparel studies! Plus we have added... conduct the clinical studies critical to the development of therapies. We can span lots of ...

Source: Panchapakesan, Balaji - Department of Electrical and Computer Engineering, University of Delaware

Collection: Materials Science ; Biotechnology

Summary:  This study aims to characterize changes in brain struc- ture in old age, and to investigate relationships... the rationale, design and methodology of the brain and neurovascular imaging proto- col developed to study... this cohort. Design An observational, longitudinal study of the Lothian Birth Cohort 1936, which comprises

Source: Edinburgh, University of - Division of Informatics, Institute for Adaptive and Neural Computation

Collection: Computer Technologies and Information Sciences

Summary:  occurrence over a prolonged time period. While the study of risk factors is very important, it does not tell... it will apply to intracranial disease and it is very unlikely to be relevant to lacunar infarction or embolism... in the same place and there are several noninvasive ways to study it. This makes carotid disease a good ...

Source: Columbia University, Department of Neurology, Motor Performance Laboratory

Collection: Biology and Medicine

Summary:  tests the TDH over the largest spatial extent to date (with the exception of Holling's 1992 study... landscapes studied have differ- ent dominant habitat scales. It is unclear whether what we ­ or Holling (1992... an as yet unrealized task. The study design in Fischer et al. (2008) allows us to simplify this task because

Source: Carleton University, Geomatics and Landscape Ecology Research Laboratory

Collection: Environmental Sciences and Ecology ; Geosciences

Summary:  a means of identifying focal brain activity related to movement of a paretic hand. Although prior studies... recovery from hemiparesis. (Stroke. 2000;31:656-661.) Key Words: lacunar infarction magnetic resonance... functional activation MRI (fMRI) studies involving recovered stroke patients have identified additional

Source: Columbia University, Department of Neurology, Motor Performance Laboratory

Collection: Biology and Medicine

Summary:  spectral poles and side lobes. After validation of the model calibration, a parametric study is carried out... -dimensional data Given the so-called roughness and lacunarity parameters H (0 H 1) and (1< ), and a set... simulations and a parametric study of Eq. (15) we proceed to validating, or better, checking the ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  -type semiconductor model where donor and acceptor lacunar levels broaden in two energy bands. At low temperatures... ]. In order to study the #12;780 JOURNAL DE PHYSIQUE I M 5 electrical properties of the subsequent compounds... into account. Then, it seemed to us interesting to undertake a continuation of these studies in other ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  been studied extensively in the literature, see e.g. [Gre69]. Such a mean is still highly nonunique... 's intuitive notion of the ``lacunarity'' of a fractal set? Mandelbrot's intriguing idea, see [Man82... of the motivation for [BF92] was to suggest average density as a numerical measure of lacunarity. A number

Source: Fisher, Albert Meads - Departamento de Matemática, Universidade de São Paulo

Collection: Mathematics

Summary:  . King. 1999. Dispersal success in fractal landscapes: a consequence of lacunarity thresholds. Landscape... | 4 studies. (Molecular Ecology Resources database accessions 37758­37769). http... . Moss, editors). Cambridge University Press, United Kingdom. With, K. A. 2005. Case Study: Assessing

Source: Kaufman, Glennis A. - Division of Biology, Kansas State University

Collection: Environmental Sciences and Ecology

Summary:  of `invariant curve' when E is complex will be made clear in the next section). Here we study numerically... consider various Pad6 approximants with M +N s 200 of the series (3), with 13fixed and real, and studied... class of analytic fiinctions that shows natural boundaries is the class of `lacunarity' functions, i

Source: Chierchia, Luigi - Department of Mathematics, Università degli Studi Roma Tre

Collection: Mathematics

Summary:  measuring mean oscillation A.K. LERNER Abstract. In this paper we study maximal sharp functions associated... known. It was introduced in [11], [20] and studied in detail in [10]. The h~llowing inequality is true... , integral means over such parallelepipeds arose in a natural manner by studying the local properties

Source: Lerner, Andrei K. - Department of Mathematics, Bar Ilan University

Collection: Mathematics

Summary:  . On the contrary lacunar dislocation loops created to assume incompatible strains due to an applied tension stress... ] That is used as a tool in the present study. #12;1852 JOURNALDE PHYSIQUEIV 2). Results and analvsis; Results

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  study, 8% of our patients referred for evaluation for HFS were diagnosed with psychogenic facial spasm... ], tumors[6], structural abnormalities[1], otitis media with effusion[4], vacular headache[2] and lacunar

Source: Lichtarge, Olivier - Department of Molecular and Human Genetics, Baylor College of Medicine

Collection: Biotechnology ; Biology and Medicine

Summary:  are tethered to the lacunar wall, which has not been clearly established. Osteocytes may also experience... as the lacunar spaces in which they reside are deformed. The mechanism by which bone cells sense and respond... the cell surface and the lacunar wall, cil- ium-matrix interactions might also play a role in mecha

Source: Stearns, Tim - Departments of Biology & Genetics, Stanford University

Collection: Biology and Medicine