Relevant bibliographies by topics / Two-weight

Academic literature on the topic 'Two-weight'

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Published: 4 June 2021
Last updated: 8 February 2022

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Journal articles on the topic "Two-weight"

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Boyvalenkov, P., K. Delchev, D. V. Zinoviev, and V. A. Zinoviev. "On two-weight codes." Discrete Mathematics 344, no. 5 (May 2021): 112318. http://dx.doi.org/10.1016/j.disc.2021.112318.

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Li, Chengju, Sunghan Bae, and Shudi Yang. "Some two-weight and three-weight linear codes." Advances in Mathematics of Communications 13, no. 1 (2019): 195–211. http://dx.doi.org/10.3934/amc.2019013.

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Shi, Minjia, Yue Guan, and Patrick Sole. "Two New Families of Two-Weight Codes." IEEE Transactions on Information Theory 63, no. 10 (October 2017): 6240–46. http://dx.doi.org/10.1109/tit.2017.2742499.

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Heng, Ziling, and Qin Yue. "Two classes of two-weight linear codes." Finite Fields and Their Applications 38 (March 2016): 72–92. http://dx.doi.org/10.1016/j.ffa.2015.12.002.

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Tait, Alexander N., Allie X. Wu, Thomas Ferreira de Lima, Mitchell A. Nahmias, Bhavin J. Shastri, and Paul R. Prucnal. "Two-pole microring weight banks." Optics Letters 43, no. 10 (May 7, 2018): 2276. http://dx.doi.org/10.1364/ol.43.002276.

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Moen, Kabe. "Sharp one-weight and two-weight bounds for maximal operators." Studia Mathematica 194, no. 2 (2009): 163–80. http://dx.doi.org/10.4064/sm194-2-4.

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Chunming Tang, Yanfeng Qi, and Dongmei Huang. "Two-Weight and Three-Weight Linear Codes From Square Functions." IEEE Communications Letters 20, no. 1 (January 2016): 29–32. http://dx.doi.org/10.1109/lcomm.2015.2497344.

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Caballero, L., L. M. Martín, and J. B. Alvarez. "Variation of high molecular weight glutenin subunits in two neglected tetraploid wheat subspecies." Czech Journal of Genetics and Plant Breeding 44, No. 4 (January 22, 2009): 140–46. http://dx.doi.org/10.17221/61/2008-cjgpb.

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The genetic diversity of 140 accessions of Triticum turgidum ssp. carthlicum Nevski em. A. Löve & D. Löve and 159 accessions of T. turgidum ssp. polonicum L. em. Thell. was evaluated by the analysis of HMW glutenin subunits. Seven allelic variants were found among the carthlicum accessions: three at the Glu-A1 locus (two of them were novel alleles) and four at the Glu-B1 locus (one of them novel). More variability was found among the polonicum accessions with 16 allelic variants: six at the Glu-A1 locus (three of them novel), and ten at the Glu-B1 locus (five of them novel). Totally, ten new alleles were found, one of which appeared in both subspecies. Out of 19 different combinations of alleles detected in both subspecies, 14 were novel. Based on the available passport data, the carthlicum accessions could be separated by origin into 18 groups, and the polonicum accessions into 33 such groups. The genetic diversity was lower among the carthlicum (Ht = 0.174) than among the polonicum accessions (Ht = 0.562). In both subspecies, most diversity was present between groups differing in origin, whereas diversity within the groups was very low. The detected variability offers possibilities for the improvement of bread making quality in durum wheat through introduction of newly detected alleles and for the broadening of genetic diversity in this wheat species.
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Opic, Bohumír, and Petr Gurka. "$A_r$-condition for two weight functions and compact imbeddings of weighted Sobolev spaces." Czechoslovak Mathematical Journal 38, no. 4 (1988): 611–17. http://dx.doi.org/10.21136/cmj.1988.102257.

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Vega, Gerardo. "Two-weight cyclic codes constructed as the direct sum of two one-weight cyclic codes." Finite Fields and Their Applications 14, no. 3 (July 2008): 785–97. http://dx.doi.org/10.1016/j.ffa.2008.01.002.

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Dissertations / Theses on the topic "Two-weight"

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Choudhry, Khurshid Mohammand. "Weight loss and weight gain within two English prisons." Thesis, King's College London (University of London), 2018. https://kclpure.kcl.ac.uk/portal/en/theses/weight-loss-and-weight-gain-within-two-english-prisons(0b08218c-db2d-49e6-8aea-7b88ec1d4493).html.

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The aim of this thesis was to investigate obesity and weight change in two English prisons using both qualitative and quantitative methods. The research incorporated the first study to assess UK male prisoners’ weight change during imprisonment, as well as the first study to take into consideration factors associated with weight change specific to the prison setting. Data collection, for both qualitative and quantitative components of the study, started in May 2013 and ceased in November 2015. Qualitative interviews were undertaken with prison nurses (17 interviewees) and prisoners (19 interviewees) to obtain an understanding of how imprisonment and the prison setting can influence a prisoner’s weight. These interviews showed similar findings with both groups identifying food and physical activity as important factors that might influence a prisoner’s weight. These opinions were similar to views that might be expressed in a community setting. However, in addition, both groups identified how imprisonment and the prison environment created a unique setting for weight management. These contextual factors influenced health related behaviours and provided a greater understanding of the determinants of prisoners’ health. Power was a key theme, shown to exist in many different forms and having a positive and negative influence on prisoners’ health related behaviours. These were shown to be influenced by three main sources of power: the prison, other prisoners and impact of the outside world. Time, in various forms, was also found to play an important role in dictating prisoners’ health-related behaviours. The quantitative study demonstrated the complex relationship between imprisonment and weight and the influence of age on weight change. Findings from the quantitative study supported the results from the two qualitative studies showing how prison culture impacted on weight and weight change. The final discussion utilises various models of embodiment, including those specific to men’s health, to understand the results of this research project. The final conclusion challenges some commonly held perceptions of prisoners’ health related behaviour and provides a theoretical model that could be developed to provide more appropriate care for prisoners in the future.
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Scurry, James. "One and two weight theory in harmonic analysis." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47565.

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This thesis studies several problems dealing with weighted inequalities and vector-valued operators. A weight is a nonnegative locally integrable function, and weighted inequalities refers to studying a given operator's continuity from one weighted Lebesgue space to another. The case where the underlying measure of both Lebesgue spaces is given by the same weight is known as a one weight inequality and the case where the weights are different is called a two weight inequality. These types of inequalities appear naturally in harmonic analysis from attempts to extend classical results to function spaces where the underlying measure is not necessarily Lebesgue measure. For most operators from harmonic analysis, Muckenhoupt weights represent the class of weights for which a one weight inequality holds. Chapters II and III study questions involving these weights. In particular, Chapter II focuses on determining the sharp dependence of a vector-valued singular integral operator's norm on a Muckenhoupt weight's characteristic; we determine that the vector-valued operator recovers the scalar dependence. Chapter III presents material from a joint work with M. Lacey. Specifically, in this chapter we estimate the weak-type norms of a simple class of vector-valued operators, but are unable to obtain a sharp result. The final two chapters consider two weight inequalities. Chapter IV characterizes the two weight inequality for a subset of the vector-valued operators considered in Chapter III. The final chapter presents examples to argue there is no relationship between the Hilbert transform and the Hardy-Littlewood maximal operator in the two weight setting; the material is taken from a joint work with M. Reguera.
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Mengestie, Tesfa Yigrem. "Two Weight Discrete Hilbert Transforms and Systems of Reproducing Kernels." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for matematiske fag, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-12596.

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The Hilbert transform has become increasingly popular over the years due to its wide ranging applications not only in mathematics, but also in many other applied areas. In a quest for more applications, studying various aspects of its two weight forms has been a subject of high interest as early as the 1970’s. Of special interest is the interface of the Hilbert transform with the notions of Carleson measures and the system of reproducing kernels in spaces of analytic functions. Though these notions have proved to be of fundamental importance and ubiquitous in the development of function theoretic spaces, their properties for many significant spaces, including the model subspace of the Hardy spaces H2 ;have not yet been well understood. The present thesis focuses on this interface and provides answers to several problems encompassing them. The thesis consists of five chapters. The first chapter provides an up-to-date review of the relevant background literature. The remaining chapters contain results that have been published by, or intended for, international journals. The work in chapter two covers the problems of unitarity, invertibility, boundedness, and surjective mapping properties of the two weight discrete Hilbert transforms, and a complete solution is obtained for the first one. Our solutions for the remaining problems are complete under a sparsity priori growth condition. Under such a condition, we describe bounded two weight Hilbert transforms in terms of a relatively simple A2 conditions. As a consequence, computable geometric criteria have been established for invertibility of such maps. Chapter two also provides all the basic underpinnings for the materials presented in Chapter three and Chapter four, where links have been established to interpolate all our results on the weighted transforms into statements about Carleson measures and systems of reproducing kernels in certain Hilbert spaces, of which de Branges spaces and model subspaces of H2; are prime examples. As an application, a connection to the Feichtinger conjecture, which is known to be equivalent to dozens of other conjectures including the famous Kadison–Singer problem, is pointed out and verified for certain classes of spaces. Chapter five deals again with normalized reproducing kernel Riesz bases in model subspaces of H2 generated by the class of meromorphic inner functions. In this chapter, the approach to studying such bases digresses somewhat from the methods used in the preceding chapters. Here, we study the normalized kernel bases from an equality of spaces perspective. It is known that such bases can be described in terms of equality of spaces whenever the kernels are associated with points all from the real line. When the points are from the upper half-plane, it is now proved that the analogous conditions may still be sufficient while failing to be necessary.
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Abid, S. H. "Factors affecting tissues weight and respiration in two species of locusts." Thesis, University of Nottingham, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373359.

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Kerr, Robert. "Toeplitz products and two-weight inequalities on spaces of vector-valued functions." Thesis, University of Glasgow, 2011. http://theses.gla.ac.uk/2469/.

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This thesis is concerned with operators on certain vector-valued function spaces. Namely, Bergman spaces of \mathbb{C}^n$-valued functions and L^2(\mathbb{R},\mathbb{C}^n,V)$, where $V$ is a matrix weight. We will study products of Toeplitz operators on the vector Bergman space $L^2_a(\mathbb{C}^n)$. We also study various operators, including the dyadic shift and the Hilbert transform, between $L^2(\mathbb{R},\mathbb{C}^n,V)$ and $L^2(\mathbb{R},\mathbb{C}^n,U)$. These function spaces are generalizations of normed vector spaces of functions which take values in $\mathbb{C}$. The thesis is split into two distinct areas of function space theory: analytic function spaces and harmonic analysis. There is, however, a common theme of matrix weights, particularly the reverse Hölder condition on matrix weights and a generalization of the $A_p$ conditions on matrix weights for $p=2$ and $p=\infty$.
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Lam, Ching Hung. "On The Structure of Vertex Operator Algebras and Their Weight Two Subspaces /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487934589974245.

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Wells-Fahling, Katelyn. "Effects of Two Backpack Weight Distributions on Perceptual and Physiological Measures During Walking." TopSCHOLAR®, 2002. http://digitalcommons.wku.edu/theses/594.

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Backpack weight distribution may affect economy by conserving energy and thus potentially prolonging fatigue. Research has not however examined effects of backpack weight distribution on subjective measures of intensity and comfort. Heart rate (HR) and overall and differentiated Ratings of Perceived Exertion (RPE) were examined during simulated backpacking with differentially weighted backpacks. Volunteers (n=27) completed two simulated hiking trials on a treadmill. Trials consisted of 15 minutes walking at 0% grade followed by 15 minutes walking at 10% grade at 2.5 mph (males) or 2.0 mph (females). Subjects wore an internal frame backpack packed to contain 25% of their individual body weight). In a counterbalanced order, packs were placed with either a high weight distribution (HWD) (3:1:1 ratio) placing more weight near the shoulders, and a low weight distribution (LWD) (1:1:3 ratio) placing more weight near the hips. Heart rate (HR), RPE-Overall, RPE-Legs, RPEShoulders, and RPE-Back were recorded every three minutes and compared between trials using repeated measures ANOVA. HR between HWD and LWD was similar at 0% as well as 10%. Overall and differentiated RPE's were not significantly different between (HWD vs. LWD) at 0% or 10%. Results suggest backpack weight distribution (HWD vs. LWD) does not significantly influence HR and perceptual measures during simulated hiking at a 0% or 10% grade.
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Pinnawala, Nimalsiri, and nimalsiri pinnawala@rmit edu au. "Properties of Trace Maps and their Applications to Coding Theory." RMIT University. Mathematical and Geospatial Sciences, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080515.121603.

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In this thesis we study the application of trace maps over Galois fields and Galois rings in the construction of non-binary linear and non-linear codes and mutually unbiased bases. Properties of the trace map over the Galois fields and Galois rings has been used very successfully in the construction of cocyclic Hadamard, complex Hadamard and Butson Hadamard matrices and consequently to construct linear codes over integers modulo prime and prime powers. These results provide motivation to extend this work to construct codes over integers modulo . The prime factorization of integers paved the way to focus our attention on the direct product of Galois rings and Galois fields of the same degree. We define a new map over the direct product of Galois rings and Galois fields by using the usual trace maps. We study the fundamental properties of the this map and notice that these are very similar to that of the trace map over Galois rings and Galois fields. As such this map called the trace-like map and is used to construct cocyclic Butson Hadamard matrices and consequently to construct linear codes over integers modulo . We notice that the codes construct in this way over the integers modulo 6 is simplex code of type . A further generalization of the trace-like map called the weighted-trace map is defined over the direct product of Galois rings and Galois fields of different degrees. We use the weighted-trace map to construct some non-linear codes and mutually unbiased bases of odd integer dimensions. Further more we study the distribution of over the Galois fields of degree 2 and use it to construct 2-dimensional, two-weight, self-orthogonal codes and constant weight codes over integers modulo prime.
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Pötzsch, Anne, Almut Rudolph, Ricarda Schmidt, and Anja Hilbert. "Two sides of weight bias in adolescent binge-eating disorder: adolescents’ perceptions and maternal attitudes." Wiley, 2018. https://ul.qucosa.de/id/qucosa%3A33737.

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Objective: Adolescents with binge-eating disorder (BED) are suffering from weight teasing and, as found in adults with BED, are likely to internalize weight bias. Weight teasing by mothers accounts for psychopathology in overweight, but sources of stigmatization are largely unknown in BED. This study sought to address familial weight bias in adolescents with overweight and BED by examining adolescents’ perceived parental weight teasing and weight bias internalization in relation to their eating disorder psychopathology and maternal stigmatizing attitudes and beliefs. Method: Adolescents with overweight and BED (BED; n = 40) were compared to a socio-demographically matched group with overweight only (OW) and a normal-weight control group (NW; each n = 25). They filled out the Perception of Teasing Scale, with parents as the source of teasing, the Weight Bias Internalization Scale and the Eating Disorder Examination-Questionnaire. Their mothers filled out the Attitudes Toward and Beliefs about Obese Persons Scales. Results: Significantly higher perceived parental weight teasing and weight bias internalization were found in BED compared to OW and NW. Maternal stigmatizing attitudes and beliefs did not differ between groups and were not correlated with adolescents’ perceptions of being stigmatized. Perceived parental weight teasing predicted adolescents’ eating disorder psychopathology, however, this association was fully mediated by weight bias internalization. Discussion: These results indicate that adolescents with overweight and BED perceive weight teasing in their own families. As we found no significant association between adolescents’ perceptions of being stigmatized and maternal stigmatizing attitudes, future research should examine weight-related parent-child interaction or implicit measures of stigmatizing attitudes.
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Westlake, Steven James. "The effects of two weight training modes on selected flexibility measures in college age students." Scholarly Commons, 1990. https://scholarlycommons.pacific.edu/uop_etds/2195.

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The purpose of this study was to investigate the effects of different strength training modes on joint range of motion. The problem of the study was to compare Nautilus to free-weight training modes in terms of selected joints' ranges of motion before and after an eight-week strength training program. The hypothesis asserted was that there was no difference between pre-test and post-test scores when comparing Nautilus to free-weight training modes. Subjects were thirty college-age students enrolled in beginning weight-training classes at the University of the Pacific. The subjects were acquired from intact classes and comprised two groups of 9 males and 6 females each. Pre-test and post-test flexibility measures were acquired by use of a Leighton Flex-o-meter and sit-and-reach protocols. Single joint measures of shoulder flexion, extension and abduction, hip flexion, extension and abduction, elbow flexion, knee flexion, and low back flexion were acquired. For eight weeks, two times per week, each class completed an 8 to 12 repetitions per each exercise protocol following the principles of training asserted by Nautilus. Pre-test data for all bilateral joints were statistically analyzed with paired t-tests in order to determine any differences. No significant bilateral differences were found; consequently, these data were converted to eight single measures of average range of motion of the joints respectively. Pretest data then were analyzed with two-factor ANOV A (group x gender) in order to determine if the two intact classes initially represented the same population. The only measure in which a group difference was found was shoulder extension (p
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Books on the topic "Two-weight"

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1953-, Cooper Glenn, ed. The two-day diet: A metabolic and motivational approach to rapid weight loss. New York: Random House, 1988.

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Cruise, Jorge. The 3-hour diet for teens: Lose weight and feel great in two weeks! New York, NY: Collins, 2007.

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Kelley, Brendan. The couples' diet: The revolutionary weight-loss program that proves it's easier for two people to lose weight than it is for one. Garden City, N.Y: Doubleday, 1986.

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Glover, M. H. Performance of two-plate enforement weighers. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1989.

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Glover, M. H. Performance of two-plate enforement weighers. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1989.

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8 minutes in the morning: A simple way to shed up to two pounds a week--guaranteed. New York: HarperResource, 2003.

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Harvie, Michelle. The 2-day diet: Diet two days a week, eat the Mediterranean way for five. New York: Three Rivers Press, 2013.

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1975-, Bradshaw Amy D., ed. Texas two-step diet: How to achieve happiness and health even when faced with cheese enchiladas! Albany, TX: Bright Sky Press, 2005.

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Luther, Maureen. Developmental outcome in the first two years of life in extremely low-birthweight infants with and without bronchopulmonary dysplasia. Ottawa: National Library of Canada = Bibliothèque nationale du Canada, 1993.

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Six weeks to skinny jeans: Blast fat, firm your butt, and lose two jean sizes. Emmaus, Pa: Rodale, 2012.

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Book chapters on the topic "Two-weight"

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Kokilashvili, Vakhtang, Alexander Meskhi, Humberto Rafeiro, and Stefan Samko. "Two-weight Estimates." In Integral Operators in Non-Standard Function Spaces, 219–95. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-21015-5_4.

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Cruz-Uribe, David V., José María Martell, and Carlos Pérez. "Two-Weight Factorization." In Weights, Extrapolation and the Theory of Rubio de Francia, 123–34. Basel: Springer Basel, 2011. http://dx.doi.org/10.1007/978-3-0348-0072-3_6.

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Cruz-Uribe, David V., José María Martell, and Carlos Pérez. "Two-Weight Extrapolation." In Weights, Extrapolation and the Theory of Rubio de Francia, 135–62. Basel: Springer Basel, 2011. http://dx.doi.org/10.1007/978-3-0348-0072-3_7.

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Kozlov, Vladimir, and Vladimir Maz’ya. "Two-Weight L2-Estimates." In Springer Monographs in Mathematics, 75–87. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-662-11555-8_4.

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Cruse, T. A. "Two-Dimensional Weight Function Evaluation." In Mechanics: Computational Mechanics, 141–55. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-1385-1_8.

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Cruz-Uribe, David V., José María Martell, and Carlos Pérez. "Applications of Two-Weight Extrapolation." In Weights, Extrapolation and the Theory of Rubio de Francia, 175–200. Basel: Springer Basel, 2011. http://dx.doi.org/10.1007/978-3-0348-0072-3_9.

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Cruz-Uribe, David V., José María Martell, and Carlos Pérez. "Further Applications of Two-Weight Extrapolation." In Weights, Extrapolation and the Theory of Rubio de Francia, 201–36. Basel: Springer Basel, 2011. http://dx.doi.org/10.1007/978-3-0348-0072-3_10.

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Schmidt, Bernhard. "4. Two-weight irreducible cyclic codes." In Characters and Cyclotomic Fields in Finite Geometry, 79–90. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-540-45797-8_4.

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Kokilashvili, Vakhtang, Alexander Meskhi, Humberto Rafeiro, and Stefan Samko. "Two-weight Inequalities for Fractional Maximal Functions." In Integral Operators in Non-Standard Function Spaces, 355–94. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-21015-5_6.

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Carlson, James A., and Carlos Simpson. "Shimura Varieties of Weight Two Hodge Structures." In Lecture Notes in Mathematics, 1–15. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/bfb0077525.

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Conference papers on the topic "Two-weight"

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Shi, Chun, Xin Yin, Chunyu Li, Ruyin Xu, and Shuqian He. "Two Algorithms for Weight Problems." In 2016 International Conference on Education, Management and Computer Science. Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/icemc-16.2016.228.

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Baines, Andrew, and Harry R. Millwater. "Two-Dimensional Weight Function Development Using ZFEM." In 52nd Aerospace Sciences Meeting. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2014. http://dx.doi.org/10.2514/6.2014-0008.

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Wolfmann, Jacques. "Projective two-weight Cyclic or Constacyclic Codes." In 2006 IEEE International Symposium on Information Theory. IEEE, 2006. http://dx.doi.org/10.1109/isit.2006.261789.

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Ordentlich, Erik, and Ron M. Roth. "Low complexity two-dimensional weight-constrained codes." In 2011 IEEE International Symposium on Information Theory - ISIT. IEEE, 2011. http://dx.doi.org/10.1109/isit.2011.6033792.

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Boyvalenkov, P., K. Delchev, D. V. Zinoviev, and V. A. Zinoviev. "On two-weight (linear and nonlinear) codes." In 2020 Algebraic and Combinatorial Coding Theory (ACCT). IEEE, 2020. http://dx.doi.org/10.1109/acct51235.2020.9383353.

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Ding, Cunsheng, Jinquan Luo, and Harald Niederreiter. "Two-Weight Codes Punctured from Irreducible Cyclic Codes." In Proceedings of the First International Workshop. WORLD SCIENTIFIC, 2008. http://dx.doi.org/10.1142/9789812832245_0009.

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KISHINE, JUN-ICHIRO, NOBUO FURUKAWA, and KENJI YONEMITSU. "TWO-LOOP RENORMALIZATION OF THE QUASIPARTICLE WEIGHT IN TWO-DIMENSIONAL ELECTRON SYSTEMS." In Proceedings of the 10th International Conference. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812792754_0013.

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Xu, Guangkui, Xiwang Caq, Wei Du, and Gaojun Luq. "A class of two-weight and three-weight codes from a certain non-quadratic function." In 2017 Eighth International Workshop on Signal Design and its Applications in Communications (IWSDA). IEEE, 2017. http://dx.doi.org/10.1109/iwsda.2017.8097065.

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Xiu-Wen Yang, Song-Lin Wu, Chuan-Rong Xu, Chen Jie, and Zeng Shun-Peng. "The comparison of two types of whitenization weight function." In 2009 International Conference on Apperceiving Computing and Intelligence Analysis (ICACIA 2009). IEEE, 2009. http://dx.doi.org/10.1109/icacia.2009.5361149.

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Davoodi, Alireza. "Incorporating weight restrictions on the Two-Level DEA model." In Industrial Engineering (CIE39). IEEE, 2009. http://dx.doi.org/10.1109/iccie.2009.5223930.

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Reports on the topic "Two-weight"

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Davidson, Albert. Obesity : Two Behavioral Approaches to Weight Reduction. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.2215.

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Boersma, Peter. NHSR 153: Multiple Chronic Conditions Among Veterans and Nonveterans: United States, 2015–2018. National Center for Health Statistics, 2021. http://dx.doi.org/10.15620/cdc:101659.

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This report describes the prevalence of multiple (two or more) chronic conditions (MCC) among veterans and nonveterans and examines whether differences by veteran status may be explained by differences in sociodemographic composition, smoking behavior, and weight status based on body mass index
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Zhang, Yongping, Wen Cheng, and Xudong Jia. Enhancement of Multimodal Traffic Safety in High-Quality Transit Areas. Mineta Transportation Institute, February 2021. http://dx.doi.org/10.31979/mti.2021.1920.

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Numerous extant studies are dedicated to enhancing the safety of active transportation modes, but very few studies are devoted to safety analysis surrounding transit stations, which serve as an important modal interface for pedestrians and bicyclists. This study bridges the gap by developing joint models based on the multivariate conditionally autoregressive (MCAR) priors with a distance-oriented neighboring weight matrix. For this purpose, transit-station-centered data in Los Angeles County were used for model development. Feature selection relying on both random forest and correlation analyses was employed, which leads to different covariate inputs to each of the two jointed models, resulting in increased model flexibility. Utilizing an Integrated Nested Laplace Approximation (INLA) algorithm and various evaluation criteria, the results demonstrate that models with a correlation effect between pedestrians and bicyclists perform much better than the models without such an effect. The joint models also aid in identifying significant covariates contributing to the safety of each of the two active transportation modes. The research results can furnish transportation professionals with additional insights to create safer access to transit and thus promote active transportation.
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Dutra, Lauren M., Matthew C. Farrelly, Brian Bradfield, Jamie Ridenhour, and Jamie Guillory. Modeling the Probability of Fraud in Social Media in a National Cannabis Survey. RTI Press, September 2021. http://dx.doi.org/10.3768/rtipress.2021.mr.0046.2109.

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Cannabis legalization has spread rapidly in the United States. Although national surveys provide robust information on the prevalence of cannabis use, cannabis disorders, and related outcomes, information on knowledge, attitudes, and beliefs (KABs) about cannabis is lacking. To inform the relationship between cannabis legalization and cannabis-related KABs, RTI International launched the National Cannabis Climate Survey (NCCS) in 2016. The survey sampled US residents 18 years or older via mail (n = 2,102), mail-to-web (n = 1,046), and two social media data collections (n = 11,957). This report outlines two techniques that we used to problem-solve several challenges with the resulting data: (1) developing a model for detecting fraudulent cases in social media completes after standard fraud detection measures were insufficient and (2) designing a weighting scheme to pool multiple probability and nonprobability samples. We also describe our approach for validating the pooled dataset. The fraud prevention and detection processes, predictive model of fraud, and the methods used to weight the probability and nonprobability samples can be applied to current and future complex data collections and analysis of existing datasets.
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Robinson, W. Evaluation of thin flexible pavements under simulated aircraft traffic. Engineer Research and Development Center (U.S.), December 2020. http://dx.doi.org/10.21079/11681/39161.

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A full-scale airfield pavement test section was constructed and trafficked by the U.S. Army Engineer Research and Development Center (ERDC) to evaluate the performance of relatively thin airfield pavement structures. The test section consisted of 16 test items that included three asphalt pavement thicknesses and two different aggregate base courses. The test items were subjected to simulated aircraft traffic to evaluate their response and performance to realistic aircraft loads and to evaluate the effect of reductions in tire pressure on thin asphalt pavement. Rutting behavior, pavement cracking, instrumentation response, and falling weight deflectometer response were monitored at selected traffic intervals. The results of this study were used to extend existing Department of Defense pavement design and evaluation techniques to include the evaluation of airfield pavement sections that do not meet the current criteria for aggregate base quality and minimum asphalt concrete surface thickness. These performance data were used to develop new aggregate base failure design curves using existing stress-based design methodology.
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Thornell, Travis, Charles Weiss, Sarah Williams, Jennifer Jefcoat, Zackery McClelland, Todd Rushing, and Robert Moser. Magnetorheological composite materials (MRCMs) for instant and adaptable structural control. Engineer Research and Development Center (U.S.), November 2020. http://dx.doi.org/10.21079/11681/38721.

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Magnetic responsive materials can be used in a variety of applications. For structural applications, the ability to create tunable moduli from relatively soft materials with applied electromagnetic stimuli can be advantageous for light-weight protection. This study investigated magnetorheological composite materials involving carbonyl iron particles (CIP) embedded into two different systems. The first material system was a model cementitious system of CIP and kaolinite clay dispersed in mineral oil. The magnetorheological behaviors were investigated by using parallel plates with an attached magnetic accessory to evaluate deformations up to 1 T. The yield stress of these slurries was measured by using rotational and oscillatory experiments and was found to be controllable based on CIP loading and magnetic field strength with yield stresses ranging from 10 to 104 Pa. The second material system utilized a polystyrene-butadiene rubber solvent-cast films with CIP embedded. The flexible matrix can stiffen and become rigid when an external field is applied. For CIP loadings of 8% and 17% vol %, the storage modulus response for each loading stiffened by 22% and 74%, respectively.
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Qamhia, Issam, Erol Tutumluer, and Han Wang. Aggregate Subgrade Improvements Using Quarry By-products: A Field Investigation. Illinois Center for Transportation, June 2021. http://dx.doi.org/10.36501/0197-9191/21-017.

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This report presents a case study for constructing aggregate subgrade improvement (ASI) layers using quarry by-product aggregates (QBA), a quarry mix of large primary crushed rocks (PCR) and sand-sized quarry fines. The construction took place at Larry Power Road in Bourbonnais Township in Kankakee County, Illinois, where the Illinois Department of Transportation placed two QBA mixes. The first mix (QBA_M1) consisted of 45% quarry by-products and 55% railroad ballast–sized 3×1 PCR. The second mix (QBA_M2) consisted of 31% and 69% quarry by-products and PCR, respectively. Two conventional ASI sections were also constructed conforming to Illinois Department of Transportation’s CS02 gradation. All sections consisted of a 9 in. (229 mm) QBA/PCR layer topped with a 3 in. (76 mm) dense-graded capping layer. Laboratory studies preceded the construction to recommend optimum quarry by-product content in the QBA materials and construction practice. The Illinois Center for Transportation research team monitored the quality and uniformity of the construction using nondestructive testing techniques such as dynamic cone penetrometer, lightweight deflectometer, and falling weight deflectometer. The segregation potential was monitored by visual inspection and imaging-based techniques. Short-term field evaluation of the constructed QBA layers, particularly QBA_M2 with a 31% quarry by-product content, showed no evidence of abnormal segregation and did not jeopardize the structural integrity of the QBA ASI layers, which had slightly lower but comparable strength and stiffness profiles to the conventional ASI sections. The use of QBA materials in ASI was field validated as a sustainable construction practice to provide stable pavement foundation layers.
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Patel, Reena. Complex network analysis for early detection of failure mechanisms in resilient bio-structures. Engineer Research and Development Center (U.S.), June 2021. http://dx.doi.org/10.21079/11681/41042.

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Bio-structures owe their remarkable mechanical properties to their hierarchical geometrical arrangement as well as heterogeneous material properties. This dissertation presents an integrated, interdisciplinary approach that employs computational mechanics combined with flow network analysis to gain fundamental insights into the failure mechanisms of high performance, light-weight, structured composites by examining the stress flow patterns formed in the nascent stages of loading for the rostrum of the paddlefish. The data required for the flow network analysis was generated from the finite element analysis of the rostrum. The flow network was weighted based on the parameter of interest, which is stress in the current study. The changing kinematics of the structural system was provided as input to the algorithm that computes the minimum-cut of the flow network. The proposed approach was verified using two classical problems three- and four-point bending of a simply-supported concrete beam. The current study also addresses the methodology used to prepare data in an appropriate format for a seamless transition from finite element binary database files to the abstract mathematical domain needed for the network flow analysis. A robust, platform-independent procedure was developed that efficiently handles the large datasets produced by the finite element simulations. Results from computational mechanics using Abaqus and complex network analysis are presented.
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Rahai, Hamid, and Jeremy Bonifacio. Numerical Investigations of Virus Transport Aboard a Commuter Bus. Mineta Transportation Institute, April 2021. http://dx.doi.org/10.31979/mti.2021.2048.

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The authors performed unsteady numerical simulations of virus/particle transport released from a hypothetical passenger aboard a commuter bus. The bus model was sized according to a typical city bus used to transport passengers within the city of Long Beach in California. The simulations were performed for the bus in transit and when the bus was at a bus stop opening the middle doors for 30 seconds for passenger boarding and drop off. The infected passenger was sitting in an aisle seat in the middle of the bus, releasing 1267 particles (viruses)/min. The bus ventilation system released air from two linear slots in the ceiling at 2097 cubic feet per minute (CFM) and the air was exhausted at the back of the bus. Results indicated high exposure for passengers sitting behind the infectious during the bus transit. With air exchange outside during the bus stop, particles were spread to seats in front of the infectious passenger, thus increasing the risk of infection for the passengers sitting in front of the infectious person. With higher exposure time, the risk of infection is increased. One of the most important factors in assessing infection risk of respiratory diseases is the spatial distribution of the airborne pathogens. The deposition of the particles/viruses within the human respiratory system depends on the size, shape, and weight of the virus, the morphology of the respiratory tract, as well as the subject’s breathing pattern. For the current investigation, the viruses are modeled as solid particles of fixed size. While the results provide details of particles transport within a bus along with the probable risk of infection for a short duration, however, these results should be taken as preliminary as there are other significant factors such as the virus’s survival rate, the size distribution of the virus, and the space ventilation rate and mixing that contribute to the risk of infection and have not been taken into account in this investigation.
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Determination of the weight average molecular weight of two poly (ethylene oxides), SRM 1923 and SRM 1924. Gaithersburg, MD: National Institute of Standards and Technology, 1994. http://dx.doi.org/10.6028/nist.ir.5286.

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