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Journal articles on the topic 'Nonlinear mediation'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Loeys, Tom, Beatrijs Moerkerke, Olivia De Smet, Ann Buysse, Johan Steen, and Stijn Vansteelandt. "Flexible Mediation Analysis in the Presence of Nonlinear Relations: Beyond the Mediation Formula." Multivariate Behavioral Research 48, no. 6 (2013): 871–94. http://dx.doi.org/10.1080/00273171.2013.832132.

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Smith, E. Keith, Michael G. Lacy, and Adam Mayer. "Performance simulations for categorical mediation: Analyzing khb estimates of mediation in ordinal regression models." Stata Journal: Promoting communications on statistics and Stata 19, no. 4 (2019): 913–30. http://dx.doi.org/10.1177/1536867x19893638.

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Standard mediation techniques for fitting mediation models cannot readily be translated to nonlinear regression models because of scaling issues. Methods to assess mediation in regression models with categorical and limited response variables have expanded in recent years, and these techniques vary in their approach and versatility. The recently developed khb technique purports to solve the scaling problem and produce valid estimates across a range of nonlinear regression models. Prior studies demonstrate that khb performs well in binary logistic regression models, but performance in other mod

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3

Albert, Jeffrey M. "Distribution-Free Mediation Analysis for Nonlinear Models with Confounding." Epidemiology 23, no. 6 (2012): 879–88. http://dx.doi.org/10.1097/ede.0b013e31826c2bb9.

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De Vera, Luis, Rubén V. Rial, Ernesto Pereda, and Julián J. González. "Autonomic mediation of the interdependence between variability signals of heart rate and blood pressure in the lizard Gallotia galloti." Canadian Journal of Zoology 90, no. 7 (2012): 839–48. http://dx.doi.org/10.1139/z2012-052.

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Autonomic nervous system (ANS) involvement in the mediation of the synchronization between beat-to-beat RR interval variability (RRIV) and systolic blood pressure variability (SBPV) signals of the lizard Gallotia galloti (Oudart, 1839) was investigated through linear and nonlinear time series analysis methods in a pharmacological blockade context. The ANS blockers used were atropine, prazosin, and propranolol. The interdependence between the signals was quantified by means of the magnitude-squared coherence (MSC), which measures amplitude and phase linear synchronization; the phase lag index (

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Zhang, Wenjia, Daming Lu, Yanyan Chen, and Chengcheng Liu. "Land use densification revisited: Nonlinear mediation relationships with car ownership and use." Transportation Research Part D: Transport and Environment 98 (September 2021): 102985. http://dx.doi.org/10.1016/j.trd.2021.102985.

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Geldhof, G. John, Katherine P. Anthony, James P. Selig, and Carolyn A. Mendez-Luck. "Accommodating binary and count variables in mediation." International Journal of Behavioral Development 42, no. 2 (2017): 300–308. http://dx.doi.org/10.1177/0165025417727876.

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The existence of several accessible sources has led to a proliferation of mediation models in the applied research literature. Most of these sources assume endogenous variables (e.g., M, and Y) have normally distributed residuals, precluding models of binary and/or count data. Although a growing body of literature has expanded mediation models to include more diverse data types, the nonlinearity of these models presents a substantial hurdle to their implementation and interpretation. The present study extends the existing literature (e.g., Hayes & Preacher, 2010; Stolzenberg, 1980) to prop

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Liu, Wei, John P. Haran, Arlene S. Ash, et al. "High-dimensional Causal Mediation Analysis with a Large Number of Mediators Clumping at Zero to Assess the Contribution of the Microbiome to the Risk of Bacterial Pathogen Colonization in Older Adults." Current Bioinformatics 15, no. 7 (2020): 671–96. http://dx.doi.org/10.2174/1574893614666191115123219.

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Background: Causal mediation analysis is conducted in biomedical research with the goal of investigating causal mechanisms that consist of both direct causal pathways between the treatment and outcome variables and intermediate causal pathways through mediators. Recently, this type of analysis has been applied in the context of bioinformatics; however, it encounters the obstacle of high-dimensional and semi-continuous mediators with clumping at zero. Methods: In this article, we develop a methodology to conduct high-dimensional causal mediation analysis with a modeling framework that involves

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Cheng, Jing, Nancy F. Cheng, Zijian Guo, Steven Gregorich, Amid I. Ismail, and Stuart A. Gansky. "Mediation analysis for count and zero-inflated count data." Statistical Methods in Medical Research 27, no. 9 (2017): 2756–74. http://dx.doi.org/10.1177/0962280216686131.

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Different conventional and causal approaches have been proposed for mediation analysis to better understand the mechanism of a treatment. Count and zero-inflated count data occur in biomedicine, economics, and social sciences. This paper considers mediation analysis for count and zero-inflated count data under the potential outcome framework with nonlinear models. When there are post-treatment confounders which are independent of, or affected by, the treatment, we first define the direct, indirect, and total effects of our interest and then discuss various conditions under which the effects of

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9

Hayes, Andrew F., and Kristopher J. Preacher. "Quantifying and Testing Indirect Effects in Simple Mediation Models When the Constituent Paths Are Nonlinear." Multivariate Behavioral Research 45, no. 4 (2010): 627–60. http://dx.doi.org/10.1080/00273171.2010.498290.

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Bhattarai, Sanju, Birgit Tandstad, Archana Shrestha, Biraj Karmacharya, and Abhijit Sen. "Socioeconomic Status and Its Relation to Hypertension in Rural Nepal." International Journal of Hypertension 2021 (August 28, 2021): 1–9. http://dx.doi.org/10.1155/2021/5542438.

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Introduction. Hypertension and its association with socioeconomic positions are well established. However, the gradient of these relationships and the mediating role of lifestyle factors among rural population in low- and middle-income countries such as Nepal are not fully understood. We sought to assess the association between socioeconomic factors (education, income, and employment status) and hypertension. Also, we assessed whether the effect of education and income level on hypertension was mediated by lifestyle factors. Methods. This cross-sectional study was conducted among 260 participa

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Weiglhofer, Werner S., and Akhlesh Lakhtakia. "Mediation of nonlinear polarization by the magnetic field in a composite medium with a chiral component." Microwave and Optical Technology Letters 13, no. 5 (1996): 285–87. http://dx.doi.org/10.1002/(sici)1098-2760(19961205)13:5<285::aid-mop11>3.0.co;2-6.

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12

Setianto, Rahmat Heru. "Corporate diversification and firms' value in emerging economy: the role of growth opportunity." Journal of Asian Business and Economic Studies 27, no. 2 (2020): 195–207. http://dx.doi.org/10.1108/jabes-08-2019-0075.

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PurposeThis paper examines empirically how growth opportunities determine the relationship between corporate diversification and firm's value in an emerging economy.Design/methodology/approachThis study employs annual data of Indonesian manufacturing firm's spanning five years. To test the potential nonlinear relationship between diversification and value, nonlinear regression model is employed. Baron and Kenny’s (1986) procedure is also employed to test the mediation role of the growth opportunities in the relation between diversification strategy and firm's value. This study also performs fu

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Jiang, Hong, Wentao Liu, and Lili Jia. "How Humble Leadership Influences the Innovation of Technology Standards: A Moderated Mediation Model." Sustainability 11, no. 19 (2019): 5448. http://dx.doi.org/10.3390/su11195448.

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Management researchers have paid increasing attention to the role of humble leadership in innovation activities. The underlying mechanisms through which leader humility influences team innovation and outcomes, however, remain unclear. We aim to investigate the impact of humble leadership on the innovation of technology standards via knowledge exchange and combination and job complexity. We apply the Structural Equation Modelling (SEM) to the survey data from 354 individuals who participated in technology standard innovation activities in China. Our empirical results show that knowledge exchang

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14

De Vera, Luis, Alejandro Santana, and Julian J. Gonzalez. "Nonlinearity and fractality in the variability of cardiac period in the lizard, Gallotia galloti: effects of autonomic blockade." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 295, no. 4 (2008): R1282—R1289. http://dx.doi.org/10.1152/ajpregu.90391.2008.

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Both nonlinear and fractal properties of beat-to-beat R-R interval variability signal (RRV) of freely moving lizards ( Gallotia galloti) were studied in baseline and under autonomic nervous system blockade. Nonlinear techniques allowed us to study the complexity, chaotic behavior, nonlinearity, stationarity, and regularity over time of RRV. Scaling behavior of RRV was studied by means of fractal techniques. The autonomic nervous system blockers used were atropine, propranolol, prazosin, and yohimbine. The nature of RRV was linear in baseline and under β-, α1- and α2-adrenoceptor blockades. Atr

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15

Nook, Erik C., Stephanie F. Sasse, Hilary K. Lambert, Katie A. McLaughlin, and Leah H. Somerville. "The Nonlinear Development of Emotion Differentiation: Granular Emotional Experience Is Low in Adolescence." Psychological Science 29, no. 8 (2018): 1346–57. http://dx.doi.org/10.1177/0956797618773357.

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People differ in how specifically they separate affective experiences into different emotion types—a skill called emotion differentiation or emotional granularity. Although increased emotion differentiation has been associated with positive mental health outcomes, little is known about its development. Participants ( N = 143) between the ages of 5 and 25 years completed a laboratory measure of negative emotion differentiation in which they rated how much a series of aversive images made them feel angry, disgusted, sad, scared, and upset. Emotion-differentiation scores were computed using intra

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Zitzmann, Steffen, and Christoph Helm. "Multilevel Analysis of Mediation, Moderation, and Nonlinear Effects in Small Samples, Using Expected a Posteriori Estimates of Factor Scores." Structural Equation Modeling: A Multidisciplinary Journal 28, no. 4 (2021): 529–46. http://dx.doi.org/10.1080/10705511.2020.1855076.

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17

GUO, WEI, XIAOGANG YIN, and RUSHAN HAN. "THE RESONATING VALENCE BOND STATE IN HIGH Tc SUPERCONDUCTORS." International Journal of Modern Physics B 21, no. 18n19 (2007): 3112–17. http://dx.doi.org/10.1142/s0217979207043993.

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As indicated by NMR experimental results, there are two types of electrons in a doped cuprate: the localized Cu3d electrons, which are responsible for magnetism, and the itinerant p-band electrons carrying the charge transports. We show that the uncompensated spins at oxygen sites created by holes can pair into a resonating valence bond (RVB) state via local exchange interactions where the quasi-free local Cu spins play a role of the mediation for spin pairing. The two-component model gives a proper interpretation of the magnetic origin of high Tc superconductivity, especially, in explanation

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18

YANG, WEN-XING, and SU-ZHEN ZHANG. "PREPARATION AND STORAGE OF ENTANGLED STATES FOR MULTIPLE TRAPPED IONS IN THERMAL MOTION." Modern Physics Letters B 20, no. 24 (2006): 1507–16. http://dx.doi.org/10.1142/s0217984906011530.

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We present an alternative scheme to prepare entangled states of multiple trapped ions in thermal motion. In this scheme the vibrational degrees of freedom are only regarded as intermediate states and the ions exchange energy via the mediation of the vibration of the vibrational mode in coupling processes. The scheme is insensitive to both the initial vibrational state and heating if the system remains in the Lamb–Dicke regime. Since the effective Rabi frequency has a small dependence on the vibrational quantum number, the heating will have no direct effect on the internal state evolution. The

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19

Yu, Qingzhao, Kaelen L. Medeiros, Xiaocheng Wu, and Roxanne E. Jensen. "Nonlinear Predictive Models for Multiple Mediation Analysis: With an Application to Explore Ethnic Disparities in Anxiety and Depression Among Cancer Survivors." Psychometrika 83, no. 4 (2018): 991–1006. http://dx.doi.org/10.1007/s11336-018-9612-2.

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KUNPASURUANG, WANNAPA, YONGWIMON LENBURY, and GEERTJE HEK. "A NONLINEAR MATHEMATICAL MODEL FOR PULSATILE DISCHARGES OF LUTEINIZING HORMONE MEDIATED BY HYPOTHALAMIC AND EXTRA-HYPOTHALAMIC PATHWAYS." Mathematical Models and Methods in Applied Sciences 12, no. 05 (2002): 607–24. http://dx.doi.org/10.1142/s0218202502001817.

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A mathematical model of hormone secretion in the hypothalamo-pituitary-gonadal axis in man is extended to incorporate two different neural pathways, which have been suggested by clinical data to be capable of stimulating pulsatile discharges of LH (luteinizing hormone) independently of each other. Analysis of the nonlinear model is carried out through the use of geometric singular perturbation methods. In this way, existence of a limit cycle is proved for certain ranges of the system parameters. When the LH secretion rate independent of the hypothalamus is assumed constant, dropping the hypoth

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21

WILSON, JOHN A. "THE CHEMICAL, NEGATIVE-U APPROACH TO HIGH TEMPERATURE SUPERCONDUCTIVITY." International Journal of Modern Physics B 03, no. 05 (1989): 691–710. http://dx.doi.org/10.1142/s0217979289000518.

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Data published over the past year is examined in the light of the on-site negative U modelling proposed earlier. The model emphasizes how one must proceed beyond mixed valence to consider closely the charge transfer fluctuation conditions between the two subsystems. The situation prevailing is an intermediate U situation, being one in proximity to the Mott-Anderson transition. The high level of p-d mixing, in the copper oxide superconductors is seen to favour charge- at the expense of spin-fluctuation mediation. The proposed mixed-valently seeded, disproportionation fluctuation induced pairing

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22

Paarlberg, Laurie E., Rebecca Nesbit, Richard M. Clerkin, and Robert K. Christensen. "The Politics of Donations: Are Red Counties More Donative Than Blue Counties?" Nonprofit and Voluntary Sector Quarterly 48, no. 2 (2018): 283–308. http://dx.doi.org/10.1177/0899764018804088.

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This article integrates parallel literatures about the determinants of redistribution across place. Using regression-based path analysis, we explore how tax burden mediates the relationship between political conditions and charitable contributions. Our analysis indicates that counties with a higher proportion of people voting Republican report higher charitable contributions, and tax burden partially mediates this relationship. However, the effect of political ideology on charitable contributions is nonlinear. As the proportion voting Republican in non-Republican-dominated counties increases,

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23

Nishio, Marisa, Daisuke Takagi, Tomohiro Shinozaki, and Naoki Kondo. "Community social networks, individual social participation and dietary behavior among older Japanese adults: Examining mediation using nonlinear structural equation models for three-wave longitudinal data." Preventive Medicine 149 (August 2021): 106613. http://dx.doi.org/10.1016/j.ypmed.2021.106613.

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24

Zhang, Jiaming, and Xiangrong Deng. "Interest rate liberalization and bank liquidity creation: evidence from China." China Finance Review International 10, no. 4 (2020): 377–91. http://dx.doi.org/10.1108/cfri-06-2019-0081.

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PurposeThis study aims to empirically analyze how interest rate liberalization affects bank liquidity creation, and investigate whether the relationship between them is linear.Design/methodology/approachBased on panel data on 145 banks in China over the period 1997–2015, this paper regresses the econometric model by conducting feasible generalized least square estimation.FindingsThe regression results show that, first, interest rate liberalization has a nonlinear impact on bank liquidity creation, and the relationship between them is inverted U-shaped. In other words, as interest rate liberali

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25

Wiehl, Anna. "Beyond “toolness”." Alphaville: Journal of Film and Screen Media, no. 15 (October 9, 2018): 33–48. http://dx.doi.org/10.33178/alpha.15.03.

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The hypothesis underlying this article is that new documentary practices potentially enable new forms of mediation allowing all interactors to experience complexity and deal with contingency in a world of polyvocality through multilayered configurations. An exploration of the Korsakow documentary Racing Home (Marianne McMahon and Phil Hoffman, 2014) brings into focus the epistemological and ontological status of these assemblages. A central issue is the question of how significantly specific modes of editing in Korsakow affect the overall experience for both the authoring instances and for the

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Miura, K., Y. Sugita, K. Matsuura, N. Inaba, K. Kawano, and F. A. Miles. "The Initial Disparity Vergence Elicited With Single and Dual Grating Stimuli in Monkeys: Evidence for Disparity Energy Sensing and Nonlinear Interactions." Journal of Neurophysiology 100, no. 5 (2008): 2907–18. http://dx.doi.org/10.1152/jn.90535.2008.

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We recorded the initial vertical vergence eye movements elicited in monkeys at short latency (∼70 ms) when the two eyes see one-dimensional (1D) horizontal grating patterns that are identical except for a phase difference (disparity) of one-quarter wavelength. With gratings composed of single sine waves, responses were always compensatory, showing Gaussian dependence on log spatial frequency (on average: peak = 0.75 cycles/deg; SD = 0.74; r2 = 0.980) and monotonic dependence on log contrast with a gradual saturation well described by the Naka-Rushton equation (on average: n = 0.89; C50 = 4.1%;

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Nishio, Marisa, Daisuke Takagi, Tomohiro Shinozaki, and Naoki Kondo. "Corrigendum to “Community social networks, individual social participation and dietary behavior among older Japanese adults: Examining mediation using nonlinear structural equation models for three-wave longitudinal data”." Preventive Medicine 153 (December 2021): 106750. http://dx.doi.org/10.1016/j.ypmed.2021.106750.

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Kim, Su Jin, Jae Sung Lee, Yu Kyeong Kim, et al. "Multiple Linear Analysis Methods for the Quantification of Irreversibly Binding Radiotracers." Journal of Cerebral Blood Flow & Metabolism 28, no. 12 (2008): 1965–77. http://dx.doi.org/10.1038/jcbfm.2008.84.

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Gjedde—Patlak graphical analysis (GPGA) has commonly been used to quantify the net accumulations (Kin) of radioligands that bind or are taken up irreversibly. We suggest an alternative approach (MLAIR: multiple linear analysis for irreversible radiotracers) for the quantification of these types of tracers. Two multiple linear regression model equations were derived from differential equations of the two-tissue compartment model with irreversible binding. Multiple linear analysis for irreversible radiotracer 1 has a desirable feature for ordinary least square estimations because only the depend

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Gerich, Joachim, and Christoph Weber. "The Ambivalent Appraisal of Job Demands and the Moderating Role of Job Control and Social Support for Burnout and Job Satisfaction." Social Indicators Research 148, no. 1 (2019): 251–80. http://dx.doi.org/10.1007/s11205-019-02195-9.

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Abstract Within an extended challenge–hindrance framework, it is assumed that job demands are subjectively appraised both as challenges (that is, as working conditions that are associated with potential personal gains) and hindrances (as working conditions associated with constrains) at the same time. In accordance with transactional stress theory, the association between demand intensity and work-related attitudes (work satisfaction) and psychological strain (burnout) is expected to be mediated by individual appraisal. Moreover, because curvilinear relationships between demand and challenge a

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Klindt, J., T. G. Jenkins, and K. A. Leymaster. "Relationships between some estimates of growth hormone and prolactin secretion and rates of accretion of constituents of body gain in rams." Animal Science 41, no. 1 (1985): 103–11. http://dx.doi.org/10.1017/s0003356100017591.

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ABSTRACTRelationships between estimates of some factors affecting growth hormone (GH) and prolactin (PRL) secretion and rates of deposition of fat, protein and ash and rate of gain were investigated in Suffolk ram lambs. Factors affecting secretion were determined from measurements made by radioimmunoassay on blood samples collected at 15-min intervals during a 6-h period at a body weight of 43 to 58 kg. Depositional traits were estimated over the period of growth from 32 to 73 kg. The endocrine secretory measurements were adjusted statistically for weight at blood sampling. The only single en

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31

Yi, Tao, Zhu, Tan, and Qi. "Food Safety Incident, Public Health Concern, and Risk Spillover Heterogeneity: Avian Influenza Shocks as Natural Experiments in China’s Consumer Markets." International Journal of Environmental Research and Public Health 16, no. 21 (2019): 4182. http://dx.doi.org/10.3390/ijerph16214182.

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Background: Food safety incidents have aroused widespread public health concern, causing food price risk. However, the causal paths remain largely unexplored in previous literature. This paper sets out to identify the relations of local and spatial spillovers of food safety incidents and public health concerns to food price risk in consumer markets within a setting with heterogeneous food safety risk levels. Methods: (i) Theoretically, unlike prior work, this paper decomposes food safety risks into food safety incidents (objective incident component) and public health concern (subjective conce

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van Emmerik, T. H. M., Z. Li, M. Sivapalan, et al. "Socio-hydrologic modeling to understand and mediate the competition for water between agriculture development and environmental health: Murrumbidgee River Basin, Australia." Hydrology and Earth System Sciences Discussions 11, no. 3 (2014): 3387–435. http://dx.doi.org/10.5194/hessd-11-3387-2014.

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Abstract. Competition for water between humans and ecosystems is set to become a flash point in the coming decades in many parts of the world. An entirely new and comprehensive quantitative framework is needed to establish a holistic understanding of that competition, thereby enabling the development of effective mediation strategies. This paper presents a modeling study centered on the Murrumbidgee River Basin (MRB). The MRB has witnessed a unique system dynamics over the last 100 years as a result of interactions between patterns of water management and climate driven hydrological variabilit

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Kim, Sang Hyuk, Hyang Ki Min, and Sung Woo Lee. "Relationship between Thyroid and Kidney Function: Analysis from the Korea National Health and Nutrition Examination Survey Between 2013 and 2015." Kidney and Blood Pressure Research 45, no. 3 (2020): 442–54. http://dx.doi.org/10.1159/000507290.

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Introduction: Thyroid function is evaluated by thyroid stimulating hormone (TSH) and free thyroxine (fT4). Although many studies have indicated an intimate relationship between thyroid hormones and kidney functions, reports about the simultaneous evaluation of TSH and fT4 are rare. Objective: We aimed to analyze the association between TSH and kidney function, with emphasis on a potential nonlinear relationship, and identify an independent relationship between fT4 and kidney function. Methods: We reviewed the data of 7,061 subjects in the Korea National Health and Nutrition Examination Surveys

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van Emmerik, T. H. M., Z. Li, M. Sivapalan, et al. "Socio-hydrologic modeling to understand and mediate the competition for water between agriculture development and environmental health: Murrumbidgee River basin, Australia." Hydrology and Earth System Sciences 18, no. 10 (2014): 4239–59. http://dx.doi.org/10.5194/hess-18-4239-2014.

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Abstract. Competition for water between humans and ecosystems is set to become a flash point in the coming decades in many parts of the world. An entirely new and comprehensive quantitative framework is needed to establish a holistic understanding of that competition, thereby enabling the development of effective mediation strategies. This paper presents a modeling study centered on the Murrumbidgee River basin (MRB). The MRB has witnessed a unique system dynamics over the last 100 years as a result of interactions between patterns of water management and climate driven hydrological variabilit

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Hollebeek, Linda D., Edward C. Malthouse, and Martin P. Block. "Sounds of music: exploring consumers’ musical engagement." Journal of Consumer Marketing 33, no. 6 (2016): 417–27. http://dx.doi.org/10.1108/jcm-02-2016-1730.

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Purpose Although “engagement” is receiving increasing attention in the marketing literature, the characteristics and dynamics characterizing this concept in specific contextual conditions, including consumers’ selection of particular music and ensuing music-related behaviors, remain nebulous to date. This study aims to develop the concept of consumers’ musical engagement (ME) and explore it within a broader nomological network of conceptual relationships. Design/methodology/approach To investigate the research gap, the authors deploy a survey sampling 2,498 US-based adults to develop and confi

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Xu, Xin-Long, and Hsing Hung Chen. "Exploring the relationships between environmental management and financial sustainability in the energy industry: Linear and nonlinear effects." Energy & Environment 31, no. 7 (2019): 1281–300. http://dx.doi.org/10.1177/0958305x19882406.

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Environmental management plays a pivotal role in the financial performance of the energy industry. A number of studies have focused on the relationship between environmental management and financial sustainability, but the results are inconsistent. In addition, the existing literature failed to study the indirect and nonlinear relationship between the two. To fill this gap, this paper aims to seek out a mediator (debt financing) and employ a threshold effect model to explore the relationship between environmental management and financial sustainability in the energy industry. First, this paper

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Darewych, Jurij W., and Askold Duviryak. "Interparticle Forces in QFTs with Nonlinear Mediating Fields." Few-Body Systems 50, no. 1-4 (2011): 299–301. http://dx.doi.org/10.1007/s00601-011-0230-0.

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Chigodaev, Alexander, and Jurij W. Darewych. "Interparticle potentials in a scalar quantum field theory with a Higgs-like mediating field." Canadian Journal of Physics 91, no. 4 (2013): 279–92. http://dx.doi.org/10.1139/cjp-2012-0251.

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We study the interparticle potentials for few-particle systems in a scalar theory with a nonlinear mediating field of the Higgs type. We use the variational method, in a reformulated Hamiltonian formalism of quantum field theory, to derive relativistic three- and four-particle wave equations for stationary states of these systems. We show that the cubic and quartic nonlinear terms modify the attractive Yukawa potentials but do not change the attractive nature of the interaction if the mediating fields are massive.

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Hong, Jongbae. "Nonlinear entangled quantum dynamics in many-body systems with strong electron correlation." International Journal of Modern Physics B 31, no. 10 (2017): 1742009. http://dx.doi.org/10.1142/s0217979217420097.

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A quantum impurity system out of equilibrium comprises two metallic reservoirs with different chemical potentials and one mediating spin impurity between them. We study the highly nonlinear tunneling conductance of this system, and clarify that three coherent peaks, one zero-bias peak and two side peaks, naturally appear in the tunneling conductance. We use the Liouvillian approach, in which a complete set of basis operators is available, and construct a Liouville matrix to obtain Green’s function at the mediating site. We show that the two coherent side peaks are the outcome of steady-state n

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SONG, YUNING, and CURTIS L. BAKER. "Neural mechanisms mediating responses to abutting gratings: Luminance edgesvs.illusory contours." Visual Neuroscience 23, no. 2 (2006): 181–99. http://dx.doi.org/10.1017/s0952523806232036.

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The discontinuities of phase-shifted abutting line gratings give rise to perception of an “illusory contour” (IC) along the line terminations. Neuronal responses to such ICs have been interpreted as evidence for a specialized visual mechanism, since such responses cannot be predicted from conventional linear receptive fields. However, when the spatial scale of the component gratings (carriers) is large compared to the neuron's luminance passband, these IC responses might be evoked simply by the luminance edges at the line terminations. Thus by presenting abutting gratings at a series of carrie

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Mureşan, Vlad, Mihaela-Ligia Ungureşan, Delia Gligor, and Codruţa Varodi. "Neural Modeling of Laviron Treatment for Coating of Electrodes with Mediator." Coatings 9, no. 7 (2019): 429. http://dx.doi.org/10.3390/coatings9070429.

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In this paper, an original solution for modeling and simulation of the nonlinear electrochemical process associated to the Laviron treatment is proposed. The graphite electrodes were coated with mediator by adsorption. The Laviron treatment was firstly used to determine the efficiency of modified electrodes coatings. The experimental data were obtained using an electrochemical experiment. The mathematical model of the process is expressed using a neural network with complex structure, an aspect which represents a novel approach in this domain. The main advantages of the proposed model are: its

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MAGNON, ANNE. "NONLINEAR GRAVITON AND THE PROBLEM OF MASS GENERATION." Modern Physics Letters A 16, no. 14 (2001): 891–95. http://dx.doi.org/10.1142/s0217732301004194.

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We argue that the massless mediator of a long range interaction can acquire mass through collision with a nonlinear graviton. The process displays analogy with the Higgs mechanism, and compensates for a broken mirror symmetry (duality), at the past–future bifurcation. Mass is formulated as the electric charge of a suitable state emerging from the particle–antiparticle (self–antiself dual) confrontation. Such considerations suggest that the experimental quest of the Higgs boson could in fact shed light on the (so far theoretical) quantum gravity programme.

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Shunmugham, Loghambal, and L. Rajendran. "Analytical Expressions for Steady-State Concentrations of Substrate and Oxidized and Reduced Mediator in an Amperometric Biosensor." International Journal of Electrochemistry 2013 (2013): 1–12. http://dx.doi.org/10.1155/2013/812856.

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A mathematical model of modified enzyme-membrane electrode for steady-state condition is discussed. This model contains a nonlinear term related to enzyme kinetics reaction mechanism. The thickness dependence of an amperometric biosensor is presented both analytically and numerically where the biological layer is immobilized between a solid substrate and permeable electrode. The analytical expressions pertaining to the concentration of species and normalized current are obtained using the Adomian decomposition method (ADM). Simple and approximate polynomial expressions of concentrations of an

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Thönes, Sven, Edmund Wascher, Patrick D. Gajewski, and Stephan Getzmann. "Time Hurries on but Does not Fly in Older Age — No Effect of Depressive Symptoms." Timing & Time Perception 9, no. 3 (2021): 241–56. http://dx.doi.org/10.1163/22134468-bja10007.

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Abstract Research on the commonly known phenomenon of perceived accelerated time passage with increasing age has provided inconsistent results. This could be due to a mediating time-slowing effect of depressive symptoms as the prevalence of depression does also alter with age. Based on a large sample of 380 subjects covering a continuous range of age between 20 and 70 years, we tested whether the assumed age-related effect on time perception is being mediated by symptoms of depression. Cross-sectional differences indicate a weak, but significant nonlinear acceleration of the perceived passage

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Chon, K. H., Y. M. Chen, V. Z. Marmarelis, D. J. Marsh, and N. H. Holstein-Rathlou. "Detection of interactions between myogenic and TGF mechanisms using nonlinear analysis." American Journal of Physiology-Renal Physiology 267, no. 1 (1994): F160—F173. http://dx.doi.org/10.1152/ajprenal.1994.267.1.f160.

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Previous studies using linear techniques have provided valuable insights into the dynamic characteristics of whole kidney autoregulation and have led to the general conclusion that the myogenic mechanism and tubuloglomerular feedback (TGF) are highly nonlinear control mechanisms. To explore further the dynamic nature of these nonlinear autoregulatory mechanisms, we introduce the technique of nonlinear modeling using Volterra-Wiener kernels. In the past several years, use of Volterra-Wiener kernels for nonlinear approximation has been most notably applied to neurophysiology. Recent advances in

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Jaiswal, Anand K., and Rakesh Niraj. "Examining mediating role of attitudinal loyalty and nonlinear effects in satisfaction‐behavioral intentions relationship." Journal of Services Marketing 25, no. 3 (2011): 165–75. http://dx.doi.org/10.1108/08876041111129155.

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Chigodaev, Alexander, and Jurij W. Darewych. "Particle–antiparticle potential in scalar quantum field theory with a Higgs-like mediating field." Canadian Journal of Physics 91, no. 10 (2013): 764–69. http://dx.doi.org/10.1139/cjp-2012-0515.

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We study the particle–antiparticle force in a model scalar quantum field theory (QFT) with a nonlinear Higgs-like mediating field. We use the variational method in a reformulated Hamiltonian formalism of the theory. The trial state consists of a superposition of single-pair and two-pair Fock states. Coupled relativistic integral equations for the one- and two-pair channel functions are derived and their nonrelativistic limit forms are obtained. Variational ansatz are used to derive the correction to the dominant Yukawa interparticle potential for the particle–antiparticle system. The correctio

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Boada, Jordi, Rohan Arthur, David Alonso, et al. "Immanent conditions determine imminent collapses: nutrient regimes define the resilience of macroalgal communities." Proceedings of the Royal Society B: Biological Sciences 284, no. 1851 (2017): 20162814. http://dx.doi.org/10.1098/rspb.2016.2814.

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Predicting where state-changing thresholds lie can be inherently complex in ecosystems characterized by nonlinear dynamics. Unpacking the mechanisms underlying these transitions can help considerably reduce this unpredictability. We used empirical observations, field and laboratory experiments, and mathematical models to examine how differences in nutrient regimes mediate the capacity of macrophyte communities to sustain sea urchin grazing. In relatively nutrient-rich conditions, macrophyte systems were more resilient to grazing, shifting to barrens beyond 1 800 g m −2 (urchin biomass), more t

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Kashimori, Y., M. Naito, N. Sasaki, and T. Kambara. "Mechanism of nonlinear responses of taste cells to mixed tastes." American Journal of Physiology-Cell Physiology 271, no. 1 (1996): C405—C422. http://dx.doi.org/10.1152/ajpcell.1996.271.1.c405.

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Coupling between ionic flows through different kinds of channels affects essentially the responses of multisensitive taste cells to single- and mixed-taste stimuli. The mechanism of taste transduction is studied by using a realistic model of the multisensitive cells of the rat. The transduction pathways considered are amiloride-sensitive Na+ channels for NaCl and HCl and adenosine 3',5'-cyclic monophosphate-mediating K+ channels for sucrose. Contributions of paracellular pathways and taste-insensitive ionic channels are also studied. The calculated responses of various multisensitive cells ind

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Uma Maheswari, M., and L. Rajendran. "Analytical Expressions of Concentrations of Substrate and Hydroquinone in an Amperometric Glucose Biosensor." ISRN Physical Chemistry 2013 (February 18, 2013): 1–13. http://dx.doi.org/10.1155/2013/143870.

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The theoretical model for an amperometric glucose biosensor is discussed. In this model glucose oxidase enzyme is immobilized in conducting polypyrrole. This model contains a nonlinear term related to enzyme reaction kinetics. He’s homotopy perturbation method is used to find the approximate analytical solutions of coupled non-linear reaction diffusion equations. A closed-form expression of substrate and mediator concentration under non-steady-state conditions is obtained. A comparison of the analytical approximation and numerical simulation is also presented. An agreement between analytical e

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