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Dey R, Mondal A, Kumar S. Bootstrap tests for simultaneous monotone ordering of effects in a two-way ANOVA. Biom J 2024; 66:e2300238. [PMID: 38581103 DOI: 10.1002/bimj.202300238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 01/05/2024] [Accepted: 02/09/2024] [Indexed: 04/08/2024]
Abstract
In a two-way additive analysis of variance (ANOVA) model, we consider the problem of testing for homogeneity of both row and column effects against their simultaneous ordering. The error variances are assumed to be heterogeneous with unbalanced samples in each cell. Two simultaneous test procedures are developed-the first one using the likelihood ratio test (LRT) statistics of two independent hypotheses and another based on the consecutive pairwise differences of estimators of effects. The parametric bootstrap (PB) approach is used to find critical points of both the tests and the asymptotic accuracy of the bootstrap is established. An extensive simulation study shows that the proposed tests achieve the nominal size and have very good power performance. The robustness of the tests is also analyzed under deviation from normality. An "R" package is developed and shared on "GitHub" for ease of implementation of users. The proposed tests are illustrated using a real data set on the mortality due to alcoholic liver disease and it is shown that age and gender have a significant impact on the increasing incidence of mortality.
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Affiliation(s)
- Raju Dey
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Anjana Mondal
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Somesh Kumar
- Department of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur, India
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2
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Ma Z, Zhang Y. Driver-Automated Vehicle Interaction in Mixed Traffic: Types of Interaction and Drivers' Driving Styles. HUMAN FACTORS 2024; 66:544-561. [PMID: 35469464 PMCID: PMC10757400 DOI: 10.1177/00187208221088358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
OBJECTIVE This study investigated drivers' subjective feelings and decision making in mixed traffic by quantifying driver's driving style and type of interaction. BACKGROUND Human-driven vehicles (HVs) will share the road with automated vehicles (AVs) in mixed traffic. Previous studies focused on simulating the impacts of AVs on traffic flow, investigating car-following situations, and using simulation analysis lacking experimental tests of human drivers. METHOD Thirty-six drivers were classified into three driver groups (aggressive, moderate, and defensive drivers) and experienced HV-AV interaction and HV-HV interaction in a supervised web-based experiment. Drivers' subjective feelings and decision making were collected via questionnaires. RESULTS Results revealed that aggressive and moderate drivers felt significantly more anxious, less comfortable, and were more likely to behave aggressively in HV-AV interaction than in HV-HV interaction. Aggressive drivers were also more likely to take advantage of AVs on the road. In contrast, no such differences were found for defensive drivers indicating they were not significantly influenced by the type of vehicles with which they were interacting. CONCLUSION Driving style and type of interaction significantly influenced drivers' subjective feelings and decision making in mixed traffic. This study brought insights into how human drivers perceive and interact with AVs and HVs on the road and how human drivers take advantage of AVs. APPLICATION This study provided a foundation for developing guidelines for mixed transportation systems to improve driver safety and user experience.
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Affiliation(s)
- Zheng Ma
- Penn State College of Engineering, State College, PA, USA
| | - Yiqi Zhang
- Pennsylvania State University, University Park, PA, USA
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3
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Qananwah Q, Khader A, Al-Hashem M, Mumani A, Dagamseh A. Investigating the impact of smoking habits through photoplethysmography analysis. Physiol Meas 2024; 45:015003. [PMID: 38176078 DOI: 10.1088/1361-6579/ad1b10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 01/04/2024] [Indexed: 01/06/2024]
Abstract
Smoking is widely recognized as a significant risk factor in the progression of arterial stiffness and cardiovascular diseases. Valuable information related to cardiac arrhythmias and heart function can be obtained by analyzing biosignals such as the electrocardiogram (ECG) and the photoplethysmogram (PPG). The PPG signal is a non-invasive optical technique that can be used to evaluate the changes in blood volume, and thus it can be linked to the health of the vascular system.Objective. In this study, the impact of three smoking habits-cigarettes, shisha, and electronic cigarettes (e-cigarettes)-on the features of the PPG signal were investigated.Approach. The PPG signals are measured for 45 healthy smokers before, during, and after the smoking session and then processed to extract the morphological features. Quantitative statistical techniques were used to analyze the PPG features and provide the most significant features of the three smoking habits. The impact of smoking is observed through significant changes in the features of the PPG signal, indicating blood volume instability.Main results. The results revealed that the three smoking habits influence the characteristics of the PPG signal significantly, which presentseven after 15 min of smoking. Among them, shisha has the greatest impact on PPG features, particularly on heart rate, systolic time, augmentation index, and peak pulse interval change. In contrast, e-cigarettes have the least effect on PPG features. Interestingly, smoking electronic cigarettes, which many participants use as a substitute for traditional cigarettes when attempting to quit smoking, has nearly a comparable effect to regular smoking.Significance. The findings suggest that individuals who smoke shisha are more likely to develop cardiovascular diseases at an earlier age compared to those who have other smoking habits. Understanding the variations in the PPG signal caused by smoking can aid in the early detection of cardiovascular disorders and provide insight into cardiac conditions. This ultimately contributes to the prevention of the development of cardiovascular diseases and the development of a health screening system.
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Affiliation(s)
- Qasem Qananwah
- Department of Biomedical Systems and Informatics Engineering, Hijjawi Faculty for Engineering Technology, Yarmouk University, Irbid, Jordan
| | - Ateka Khader
- Department of Biomedical Systems and Informatics Engineering, Hijjawi Faculty for Engineering Technology, Yarmouk University, Irbid, Jordan
| | - Munder Al-Hashem
- Department of Biomedical Systems and Informatics Engineering, Hijjawi Faculty for Engineering Technology, Yarmouk University, Irbid, Jordan
| | - Ahmad Mumani
- Department of Industrial Engineering, Hijjawi Faculty for Engineering Technology, Yarmouk University, Irbid, Jordan
| | - Ahmad Dagamseh
- Department of Electronics Engineering, Hijjawi Faculty for Engineering Technology, Yarmouk University, Irbid, Jordan
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4
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Alver S, Zhang G. Multiple comparisons of treatment against control under unequal variances using parametric bootstrap. J Appl Stat 2023; 51:1861-1877. [PMID: 39071248 PMCID: PMC11271086 DOI: 10.1080/02664763.2023.2245179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 07/30/2023] [Indexed: 07/30/2024]
Abstract
In one-way analysis of variance models, performing simultaneous multiple comparisons of treatment groups with a control group may be of interest. Dunnett's test is used to test such differences and assumes equal variances of the response variable for each group. This assumption is not always met even after transformation. A parametric bootstrap (PB) method is developed here for comparing multiple treatment group means against the control group with unequal variances and unbalanced data. In simulation studies, the proposed method outperformed Dunnett's test in controlling the type I error under various settings, particularly when data have heteroscedastic variance and unbalanced design. Simulations show that power is often lower for the PB method than for Dunnett's test under equal variance, balanced data, or smaller sample size, but similar to or higher than for Dunnett's test with unequal variance, unbalanced data and larger sample size. The method is applied to a dataset concerning isotope levels found in elephant tusks from various geographical areas. These data have very unbalanced group sizes and unequal variances. This example illustrates that the PB method is easy to implement and avoids the need for transforming data to meet the equal variance assumption, simplifying interpretation of results.
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Affiliation(s)
- Sarah Alver
- Department of Mathematics and Statistics, University of New Mexico, Albuquerque, NM, USA
| | - Guoyi Zhang
- Department of Mathematics and Statistics, University of New Mexico, Albuquerque, NM, USA
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Mondal A, Sattler P, Kumar S. Testing against ordered alternatives in a two-way model without interaction under heteroscedasticity. J MULTIVARIATE ANAL 2023. [DOI: 10.1016/j.jmva.2023.105177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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Response Time Modulates the Relationship Between Implicit Learning and Motor Ability in Children With and Without Autism Spectrum Disorders: A Preliminary Study. Motor Control 2022; 26:748-758. [PMID: 36007880 DOI: 10.1123/mc.2022-0035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/01/2022] [Accepted: 07/14/2022] [Indexed: 11/18/2022]
Abstract
Difficulty with implicit learning plays an important role in the symptomology of autism spectrum disorder (ASD). However, findings in motor learning are inconsistent. This study evaluated implicit sequence learning and its relationship with motor ability in children with and without ASD. We adopted a classic serial reaction time task with a retention task and three awareness tests. The Movement Assessment Battery for Children was administered to assess children's motor ability. Significant learning differences between children with and without ASD were only found in retention but not immediately after the serial reaction time task. These findings suggest that the impaired implicit learning in ASD is characterized as impaired consolidation where the relatively permanent changes are missing. Exploratory moderation analyses revealed a significant relationship between implicit learning and motor ability for individuals with faster response time. We argue the importance of response speed for optimal learning and should be weighted more for future intervention in children with ASD.
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Alver S, Zhang G. Parametric bootstrap procedures for three-factor ANOVA and multiple comparison procedures with unequal group variances. COMMUN STAT-SIMUL C 2022. [DOI: 10.1080/03610918.2022.2104316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Sarah Alver
- Department of Mathematics and Statistics, University of New Mexico, Albuquerque, New Mexico, USA
| | - Guoyi Zhang
- Department of Mathematics and Statistics, University of New Mexico, Albuquerque, New Mexico, USA
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Balakrishnan K, Hleihil M, Bhat MA, Ganley RP, Vaas M, Klohs J, Zeilhofer HU, Benke D. Targeting the interaction of GABA B receptors with CaMKII with an interfering peptide restores receptor expression after cerebral ischemia and inhibits progressive neuronal death in mouse brain cells and slices. Brain Pathol 2022; 33:e13099. [PMID: 35698024 PMCID: PMC9836377 DOI: 10.1111/bpa.13099] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 05/29/2022] [Indexed: 01/21/2023] Open
Abstract
Cerebral ischemia is the leading cause for long-term disability and mortality in adults due to massive neuronal death. Currently, there is no pharmacological treatment available to limit progressive neuronal death after stroke. A major mechanism causing ischemia-induced neuronal death is the excessive release of glutamate and the associated overexcitation of neurons (excitotoxicity). Normally, GABAB receptors control neuronal excitability in the brain via prolonged inhibition. However, excitotoxic conditions rapidly downregulate GABAB receptors via a CaMKII-mediated mechanism and thereby diminish adequate inhibition that could counteract neuronal overexcitation and neuronal death. To prevent the deleterious downregulation of GABAB receptors, we developed a cell-penetrating synthetic peptide (R1-Pep) that inhibits the interaction of GABAB receptors with CaMKII. Administration of this peptide to cultured cortical neurons exposed to excitotoxic conditions restored cell surface expression and function of GABAB receptors. R1-Pep did not affect CaMKII expression or activity but prevented its T286 autophosphorylation that renders it autonomously and persistently active. Moreover, R1-Pep counteracted the aberrant downregulation of G protein-coupled inwardly rectifying K+ channels and the upregulation of N-type voltage-gated Ca2+ channels, the main effectors of GABAB receptors. The restoration of GABAB receptors activated the Akt survival pathway and inhibited excitotoxic neuronal death with a wide time window in cultured neurons. Restoration of GABAB receptors and neuroprotective activity of R1-Pep was verified by using brain slices prepared from mice after middle cerebral artery occlusion (MCAO). Treatment with R1-Pep restored normal GABAB receptor expression and GABA receptor-mediated K+ channel currents. This reduced MCAO-induced neuronal excitability and inhibited neuronal death. These results support the hypothesis that restoration of GABAB receptor expression under excitatory conditions provides neuroprotection and might be the basis for the development of a selective intervention to inhibit progressive neuronal death after ischemic stroke.
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Affiliation(s)
- Karthik Balakrishnan
- Institute of Pharmacology and Toxicology, University of ZurichZurichSwitzerland,Neuroscience Center ZurichUniversity of Zurich and ETH ZurichZurichSwitzerland,Present address:
Dewpoint Therapeutics GMBHDresdenGermany
| | - Mohammad Hleihil
- Institute of Pharmacology and Toxicology, University of ZurichZurichSwitzerland,Neuroscience Center ZurichUniversity of Zurich and ETH ZurichZurichSwitzerland
| | - Musadiq A. Bhat
- Institute of Pharmacology and Toxicology, University of ZurichZurichSwitzerland
| | - Robert P. Ganley
- Institute of Pharmacology and Toxicology, University of ZurichZurichSwitzerland
| | - Markus Vaas
- Institute of Pharmacology and Toxicology, University of ZurichZurichSwitzerland,Present address:
Clinical Trial Center ZurichUniversity Hospital of ZurichZurichSwitzerland
| | - Jan Klohs
- Neuroscience Center ZurichUniversity of Zurich and ETH ZurichZurichSwitzerland,Institute for Biomedical Engineering, University of Zurich and ETH ZurichZurichSwitzerland
| | - Hanns Ulrich Zeilhofer
- Institute of Pharmacology and Toxicology, University of ZurichZurichSwitzerland,Neuroscience Center ZurichUniversity of Zurich and ETH ZurichZurichSwitzerland,Drug Discovery Network ZurichZurichSwitzerland,Institute of Pharmaceutical Sciences, ETH ZurichZurichSwitzerland
| | - Dietmar Benke
- Institute of Pharmacology and Toxicology, University of ZurichZurichSwitzerland,Neuroscience Center ZurichUniversity of Zurich and ETH ZurichZurichSwitzerland,Drug Discovery Network ZurichZurichSwitzerland
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9
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Affiliation(s)
| | - Osman Dag
- Department of Biostatistics, Hacettepe University, Ankara, Turkey
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10
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Amro L, Pauly M, Ramosaj B. Asymptotic-based bootstrap approach for matched pairs with missingness in a single arm. Biom J 2021; 63:1389-1405. [PMID: 34240446 DOI: 10.1002/bimj.202000051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 12/11/2020] [Accepted: 01/20/2021] [Indexed: 11/06/2022]
Abstract
The issue of missing values is an arising difficulty when dealing with paired data. Several test procedures are developed in the literature to tackle this problem. Some of them are even robust under deviations and control type-I error quite accurately. However, most of these methods are not applicable when missing values are present only in a single arm. For this case, we provide asymptotic correct resampling tests that are robust under heteroskedasticity and skewed distributions. The tests are based on a meaningful restructuring of all observed information in quadratic form-type test statistics. An extensive simulation study is conducted exemplifying the tests for finite sample sizes under different missingness mechanisms. In addition, illustrative data examples based on real life studies are analyzed.
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Affiliation(s)
- Lubna Amro
- Mathematical Statistics and Applications in Industry, Faculty of Statistics, Technical University of Dortmund, Dortmund, Germany
| | - Markus Pauly
- Mathematical Statistics and Applications in Industry, Faculty of Statistics, Technical University of Dortmund, Dortmund, Germany
| | - Burim Ramosaj
- Mathematical Statistics and Applications in Industry, Faculty of Statistics, Technical University of Dortmund, Dortmund, Germany
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11
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Dobbs PD, Lu Y, Maness S, Coleman L, Johnson A, Metz S, Vidal C, Cheney MK. Gestational Women's Perceptions About the Harms of Cigarette and E-Cigarette Use During Pregnancy. Matern Child Health J 2020; 25:1209-1220. [PMID: 33190194 DOI: 10.1007/s10995-020-03085-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/07/2020] [Indexed: 12/18/2022]
Abstract
OBJECTIVES The purpose of this study was to examine differences between perceived harm of cigarette and electronic cigarette (e-cigarette) use while pregnant and differences between healthcare providers' communication about these products during pregnancy. METHODS A convenience sample of gestational women (n = 218; ages 18-45) living in the US completed an online survey between May and December 2017. Participants reported perceived likelihood of adverse health outcomes (e.g., low birth weight, sudden infant death syndrome) among infants/children born to mothers who used cigarettes/e-cigarettes. T-tests and two-way ANOVAs examined differences between risk perceptions of using cigarettes/e-cigarettes while pregnant based on pregnancy status (previously pregnant, currently pregnant, future pregnant). Chi-square analyses examined differences between healthcare provider communication about cigarette/e-cigarette use during pregnancy. RESULTS Overall, participants believed adverse health outcomes were significantly more likely to be caused by maternal use of cigarettes than e-cigarettes. Participants who planned to be pregnant reported higher endorsement that smoking combustible cigarettes would cause a miscarriage (p < .05) or increased blood pressure (p < .05) for a child than currently pregnant participants. Participants reported healthcare providers asked about (p < .05), advised them not to use (p < .001), and talked to them about health effects of smoking combustible cigarettes while pregnant (p < .001) significantly more than e-cigarettes. CONCLUSIONS FOR PRACTICE Healthcare providers working with pregnant women should perform the 5As behavioral intervention method to provide pregnant women with tobacco cessation care. They should also discuss the absolute harm nicotine exposure (via cigarettes or e-cigarettes) can have on fetal health and development.
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Affiliation(s)
- Page D Dobbs
- Health, Human Performance and Recreation Department, University of Arkansas, Fayetteville, AR, USA. .,Department of Health and Exercise Science, University of Arkansas, 308 HPER Building, Fayetteville, AR, 72701, USA.
| | - Yu Lu
- Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Ave, Norman, OK, 73019, USA
| | - Sarah Maness
- Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Ave, Norman, OK, 73019, USA
| | - Lois Coleman
- Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Ave, Norman, OK, 73019, USA
| | - Aleyah Johnson
- Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Ave, Norman, OK, 73019, USA
| | - Samantha Metz
- Seven Valley Health Coalition, 10 Kennedy Parkway, Cortland, NY, 13045, USA
| | - Charlie Vidal
- Puerto Rico Public Health Association, New York, USA
| | - Marshall K Cheney
- Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Ave, Norman, OK, 73019, USA
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12
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Zilio M, Orzi V, Chiodini ME, Riva C, Acutis M, Boccasile G, Adani F. Evaluation of ammonia and odour emissions from animal slurry and digestate storage in the Po Valley (Italy). WASTE MANAGEMENT (NEW YORK, N.Y.) 2020; 103:296-304. [PMID: 31911376 DOI: 10.1016/j.wasman.2019.12.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 12/21/2019] [Accepted: 12/25/2019] [Indexed: 05/03/2023]
Abstract
Ammonia and odour emissions from one lagoon (Lagoon 1: pig slurry) and three tanks (Tank 2: cow slurry; Tank 3: digestate from pig slurry and energy crops; Tank 4: digestate from pig and cow slurries plus energy crop) used for slurry storage were sampled for two years (2015-2017) in livestock farms that differed for animal breeding and manure management (anaerobic digestion). On average, the ammonia emission rate (AER) was higher for Tank 3 (AER of 30.68 ± 28.1 g N-NH3 m-2 d-1) than for Lagoon 1 and Tank 2 and 4, i.e. 9.29 ± 14.89 gN-NH3 m-2 d-1, 9.38 ± 13.75 g N-NH3 m-2 d-1, 15.74 ± 21.91 g N-NH3 m-2 d-1, respectively. PLS regression analysis (R2 = 0.544; R2Adj. = 0.484) indicated that temperature was the main predictor of ammonia emitted, followed by concentration in the slurry of total ammonia and the relative percentage of volatile solids (VS). On the other hand, PLS analysis (R2 = 0.529, R2adj. = 0.417) indicated that odour emissions from animal slurry storages depended similarly upon total solids and VS (both referred to fresh weight) slurry contents, TAN/TKN ratio and degrees of biological stability (measured by anaerobic biogas potential - ABP), resulting in the Specific Odours Emission Rates (SOER) of 12,124 ± 7,914 and 35,207 ± 41,706 OUE m-2 h-1, 65,430 ± 45,360 and 43,971 ± 53,350 OUE m-2 h-1, for Lagoon 1 and Tanks 2, 3 and 4. These results suggest covering the tanks to limit both ammonia and odour emissions.
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Affiliation(s)
- M Zilio
- Gruppo Ricicla, Lab., Agricoltura e Ambiente, DiSAA, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy
| | - V Orzi
- Gruppo Ricicla, Lab., Agricoltura e Ambiente, DiSAA, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy
| | - M E Chiodini
- DiSAA, sez. Agronomia, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy
| | - C Riva
- Gruppo Ricicla, Lab., Agricoltura e Ambiente, DiSAA, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy
| | - M Acutis
- DiSAA, sez. Agronomia, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy
| | - G Boccasile
- DG Agricoltura, Regione Lombardia, Piazza Lombardia, Milano, Italy
| | - F Adani
- Gruppo Ricicla, Lab., Agricoltura e Ambiente, DiSAA, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy.
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Bo J, Pang Y, Dong L, Xing Y, Xiang Y, Zhang M, Wright M, Shen B. Brief Report: Does Social Functioning Moderate the Motor Outcomes of a Physical Activity Program for Children with Autism Spectrum Disorders-A Pilot Study. J Autism Dev Disord 2019; 49:415-421. [PMID: 30136114 DOI: 10.1007/s10803-018-3717-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Several recent studies revealed that physical activity programs that focus on fundamental motor skills could enhance both motor and social performance. The purpose of this pilot was to explore whether the social impairment of Autistic Spectrum Disorders (ASD) moderated the motor outcomes of a physical activity program. Nine children with ASD attended a 2-week program that adopted the Classroom Pivotal Response Teaching. Significant improvements on motor skills were found in all participants. Furthermore, children with more social impairment demonstrated greater motor improvement in comparison to those with less social problems. Findings suggest the importance of social factors on the outcomes of physical activity programs and the interplays between social and motor domains in ASD interventions.
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Affiliation(s)
- Jin Bo
- School of Physical Education, Central China Normal University, Wuhan, People's Republic of China.
- Department of Psychology, Eastern Michigan University, 341 MJ Science Building, Ypsilanti, MI, 48197, USA.
- Center for Human Growth and Development, University of Michigan, Ann Arbor, MI, 48109, USA.
| | - YanLi Pang
- School of Physical Education, Central China Normal University, Wuhan, People's Republic of China
| | - Liangsan Dong
- School of Physical Education, Central China Normal University, Wuhan, People's Republic of China
| | - Yu Xing
- School of Physical Education, Central China Normal University, Wuhan, People's Republic of China
| | - Yuan Xiang
- School of Physical Education, Central China Normal University, Wuhan, People's Republic of China
| | - Mingting Zhang
- School of Physical Education, Central China Normal University, Wuhan, People's Republic of China
| | - Morgan Wright
- Center for Human Growth and Development, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Bo Shen
- School of Physical Education, Central China Normal University, Wuhan, People's Republic of China
- Division of Kinesiology, Wayne State University, Detroit, MI, 48202, USA
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Cona G, Koçillari L, Palombit A, Bertoldo A, Maritan A, Corbetta M. Archetypes of human cognition defined by time preference for reward and their brain correlates: An evolutionary trade-off approach. Neuroimage 2018; 185:322-334. [PMID: 30355533 DOI: 10.1016/j.neuroimage.2018.10.050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 10/05/2018] [Accepted: 10/18/2018] [Indexed: 01/24/2023] Open
Abstract
Biological systems carry out multiple tasks in their lifetime, which, in the course of evolution, may lead to trade-offs. In fact phenotypes (different species, individuals within a species, circuits, bacteria, proteins, etc.) cannot be optimal at all tasks, and, according to Pareto optimality theory, lay into a well-defined geometrical distribution (polygons and/or polyhedrons) in the space of traits. The vertices of this distribution contain archetypes, namely phenotypes that are specialists at one of the tasks, whereas phenotypes toward the center of the geometrical distribution show average performance across tasks. We applied this theory to the variability of cognitive and behavioral scores measured in 1206 individuals from the Human Connectome Project. Among all possible combinations of pairs of traits, we found the best fit to Pareto optimality when individuals were plotted in the trait-space of time preferences for reward, evaluated with the Delay Discounting Task (DDT). The DDT measures subjects' preference in choosing either immediate smaller rewards or delayed larger rewards. Time preference for reward was described by a triangular distribution in which each of the three vertices included individuals who used a particular strategy to discount reward. These archetypes accounted for variability on many cognitive, personality, and socioeconomic status variables, as well as differences in brain structure and functional connectivity, with only a weak influence of genetics. In summary, time preference for reward reflects a core variable that biases human phenotypes via natural and cultural selection.
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Affiliation(s)
- Giorgia Cona
- Department of General Psychology, University of Padua, Italy; Padova Neuroscience Center (PNC), University of Padua, Italy
| | - Loren Koçillari
- Department of Physics, University of Padua, Italy; Padova Neuroscience Center (PNC), University of Padua, Italy
| | - Alessandro Palombit
- Department of Information Engineering, University of Padua, Italy; Padova Neuroscience Center (PNC), University of Padua, Italy
| | - Alessandra Bertoldo
- Department of Information Engineering, University of Padua, Italy; Padova Neuroscience Center (PNC), University of Padua, Italy
| | - Amos Maritan
- Department of Physics, University of Padua, Italy; Padova Neuroscience Center (PNC), University of Padua, Italy
| | - Maurizio Corbetta
- Department of Neuroscience, University of Padua, Italy; Departments of Neurology, Radiology, Neuroscience, Washington University School of Medicine, Saint Louis, USA; Padova Neuroscience Center (PNC), University of Padua, Italy.
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Bathke AC, Friedrich S, Pauly M, Konietschke F, Staffen W, Strobl N, Höller Y. Testing Mean Differences among Groups: Multivariate and Repeated Measures Analysis with Minimal Assumptions. MULTIVARIATE BEHAVIORAL RESEARCH 2018; 53:348-359. [PMID: 29565679 PMCID: PMC5935051 DOI: 10.1080/00273171.2018.1446320] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
To date, there is a lack of satisfactory inferential techniques for the analysis of multivariate data in factorial designs, when only minimal assumptions on the data can be made. Presently available methods are limited to very particular study designs or assume either multivariate normality or equal covariance matrices across groups, or they do not allow for an assessment of the interaction effects across within-subjects and between-subjects variables. We propose and methodologically validate a parametric bootstrap approach that does not suffer from any of the above limitations, and thus provides a rather general and comprehensive methodological route to inference for multivariate and repeated measures data. As an example application, we consider data from two different Alzheimer's disease (AD) examination modalities that may be used for precise and early diagnosis, namely, single-photon emission computed tomography (SPECT) and electroencephalogram (EEG). These data violate the assumptions of classical multivariate methods, and indeed classical methods would not have yielded the same conclusions with regards to some of the factors involved.
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Affiliation(s)
- Arne C. Bathke
- Department of Mathematics, University of Salzburg; Department of Statistics, University of Kentucky
| | | | | | | | - Wolfgang Staffen
- Department of Neurology, Christian Doppler Medical Centre and Centre for Cognitive Neuroscience, Paracelsus Medical University
| | - Nicolas Strobl
- Department of Neurology, Christian Doppler Medical Centre and Centre for Cognitive Neuroscience, Paracelsus Medical University
| | - Yvonne Höller
- Department of Neurology, Christian Doppler Medical Centre and Centre for Cognitive Neuroscience, Paracelsus Medical University
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18
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Fetz AE, Neeli I, Buddington KK, Read RW, Smeltzer MP, Radic MZ, Bowlin GL. Localized Delivery of Cl-Amidine From Electrospun Polydioxanone Templates to Regulate Acute Neutrophil NETosis: A Preliminary Evaluation of the PAD4 Inhibitor for Tissue Engineering. Front Pharmacol 2018; 9:289. [PMID: 29643810 PMCID: PMC5883633 DOI: 10.3389/fphar.2018.00289] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 03/13/2018] [Indexed: 01/02/2023] Open
Abstract
Upon interaction, neutrophils can potentially release neutrophil extracellular traps (NETs) on the surface of an implanted electrospun template, which may be a significant preconditioning event for implantable biomaterials of yet unknown consequences. In this study, we investigated the potential of polydioxanone templates as a delivery vehicle for Cl-amidine, an inhibitor of peptidyl arginase deiminase 4 (PAD4), and if drug elution could attenuate PAD4-mediated NETosis in the vicinity of implanted templates. Electrospun polydioxanone templates were fabricated with distinct architectures, small diameter (0.4 μm) or large diameter (1.8 μm) fibers, and incorporated with 0-5 mg/mL Cl-amidine to examine dose-dependent effects. Acute neutrophil-template interactions were evaluated in vitro with freshly isolated human neutrophils and in vivo with a rat subcutaneous implant model. The in vitro results suggest large diameter templates with 0 mg/mL Cl-amidine significantly attenuate NETosis compared to small diameter templates. As the drug concentration increased, NETosis was significantly decreased on small diameter templates in a dose-dependent manner. The opposite was observed for large diameter templates, indicating multiple mechanisms of NETosis may be regulating neutrophil template preconditioning. Similar results were observed in vivo, verifying local NETosis inhibition by Cl-amidine eluting templates in a physiological environment. Importantly, large diameter templates with Cl-amidine enhanced neutrophil invasion and survival, supporting the potential for long-term modulation of tissue integration and regeneration. This preliminary study demonstrates a novel delivery vehicle for Cl-amidine that can be used to regulate acute NETosis as the potential critical link between the innate immune response, inflammation, and template-guided tissue regeneration.
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Affiliation(s)
- Allison E. Fetz
- Department of Biomedical Engineering, University of Memphis, Memphis, TN, United States
| | - Indira Neeli
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN, United States
| | | | - Robert W. Read
- Animal Care Facilities, University of Memphis, Memphis, TN, United States
- TriMetis Life Sciences, Memphis, TN, United States
| | - Matthew P. Smeltzer
- Division of Epidemiology, Biostatistics, and Environmental Health, School of Public Health, University of Memphis, Memphis, TN, United States
| | - Marko Z. Radic
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Gary L. Bowlin
- Department of Biomedical Engineering, University of Memphis, Memphis, TN, United States
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19
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Xu L, Wang D. Parametric bootstrap inferences for unbalanced panel data models. COMMUN STAT-SIMUL C 2017. [DOI: 10.1080/03610918.2016.1248567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Liwen Xu
- College of Sciences, North China University of Technology, Beijing, China
- School of Statistics, Renmin University of China, Beijing, China
| | - Dengkui Wang
- College of Sciences, North China University of Technology, Beijing, China
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20
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Fang GC, Kuo YC, Zhuang YJ, Tsai KH, Huang WC. Study of the ambient air metallic elements Cr, Cu, Zn, Cd and Pb at HAF sampling sites. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2017; 39:879-887. [PMID: 27461238 DOI: 10.1007/s10653-016-9858-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 07/18/2016] [Indexed: 06/06/2023]
Abstract
This study characterized diurnal variations in the compositions of total suspended particulates (TSP) and dry deposits of particulates from ambient air, and the metallic elements that are contained in them at harbor, airport and farmland (HAF) sampling sites from August, 2013 to July, 2014. Two-way ANOVA of the amounts of metallic elements in the TSP and dry deposits was carried out in all four seasons at the HAF sampling sites. The metallic elements Cr and Cu originated in local emission sources at the airport. Metallic elements Zn and Pb originated in local emission sources at the harbor. Finally, metallic element Cd originated in local emissions form farmland. The following results were also obtained. (1) The metallic composition of the TSP differed significantly from that of the dry deposits in all four seasons at the harbor and farmland sampling sites, but not at the airport sampling site. (2) High correlations coefficients were found between the amounts of metallic elements Cr and Cu in the TSP and those in the dry deposits at the airport sampling site. (3) Pb was present in the TSP and the dry deposits at the harbor sampling site.
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Affiliation(s)
- Guor-Cheng Fang
- Department of Safety, Health and Environmental Engineering, Hung Kuang University, Shalu, Taichung, 433, Taiwan.
| | - Yu-Chen Kuo
- Department of Safety, Health and Environmental Engineering, Hung Kuang University, Shalu, Taichung, 433, Taiwan
| | - Yuan-Jie Zhuang
- Department of Safety, Health and Environmental Engineering, Hung Kuang University, Shalu, Taichung, 433, Taiwan
| | - Kai-Hsiang Tsai
- Department of Safety, Health and Environmental Engineering, Hung Kuang University, Shalu, Taichung, 433, Taiwan
| | - Wen-Chuan Huang
- Department of Safety, Health and Environmental Engineering, Hung Kuang University, Shalu, Taichung, 433, Taiwan
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21
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Data analysis and statistical estimation for time series: improving presentation and interpretation. Soft comput 2017. [DOI: 10.1007/s00500-016-2041-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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Xu L, Tian M. Parametric bootstrap inferences for panel data models. COMMUN STAT-THEOR M 2017. [DOI: 10.1080/03610926.2015.1105981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Liwen Xu
- School of Statistics, Renmin University of China, Beijing, China
- College of Sciences, North China University of Technology, Beijing, China
| | - Maozai Tian
- School of Statistics, Renmin University of China, Beijing, China
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23
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Affiliation(s)
- Łukasz Smaga
- Faculty of Mathematics and Computer Science, Adam Mickiewicz University, Umultowska, Poznań, Poland
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24
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Xu L. Parametric bootstrap inferences for the growth curve models with intraclass correlation structure. COMMUN STAT-THEOR M 2017. [DOI: 10.1080/03610926.2015.1060343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Liwen Xu
- Renmin University of China, North China University of Technology, Beijing, China
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25
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Fang GC, Lo CT, Zhuang YJ, Cho MH, Huang CY, Xiao YF, Tsai KH. Seasonal variations and sources study by way of back trajectories and ANOVA for ambient air pollutants (particulates and metallic elements) within a mixed area at Longjing, central Taiwan: 1-year observation. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2017; 39:99-108. [PMID: 26943145 DOI: 10.1007/s10653-016-9810-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 02/18/2016] [Indexed: 06/05/2023]
Abstract
This study measured the concentrations of particulates and metallic elements in ambient air by using PS-1 sampler (TSP) at Longjing area. And this study focuses on the collection of ambient air particulates, metallic elements, particulate-bound mercury Hg(p), concentrations. In addition, the sources of ambient pollutants by way of back trajectory analysis are found. Moreover, test mean concentration variance differences for metallic elements (PM, Hg(p), Mn, Fe, Zn, Cr, Cu, and Pb) among the four seasons (spring, summer, autumn and winter) through ANOVA are calculated. The result indicates that the average highest particulate concentration occurred in winter season, and the order was winter > spring > autumn > summer, and the mostly highest average metallic element (Mn, Fe, Zn, Cr, Cu, Pb) concentrations occurred in autumn. Moreover, the mostly average lowest metallic element concentrations occurred in summer. In addition, the above results of backward trajectories that the major particulate pollutants parcel mainly come from northeastern Taiwan. Moreover, when comparing the results of the first half year to that of the second half year, the they indicated that all metallic elements displayed significant differences in concentrations except those of Hg(p), Mn, Fe, Zn. Finally, metallic element Hg(p) is the only one which showed no significant concentration difference from either seasonal variations or half-year observations.
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Affiliation(s)
- Guor-Cheng Fang
- Department of Safety, Health and Environmental Engineering, Hung Kuang University, Sha-Lu, Taichung, 433, Taiwan, ROC.
| | - Chaur-Tsuen Lo
- Department of Biotechnology, National Formosa University, Yunlin, 63208, Taiwan, ROC
| | - Yuan-Jie Zhuang
- Department of Safety, Health and Environmental Engineering, Hung Kuang University, Sha-Lu, Taichung, 433, Taiwan, ROC
| | - Meng-Hsien Cho
- Department of Safety, Health and Environmental Engineering, Hung Kuang University, Sha-Lu, Taichung, 433, Taiwan, ROC
| | - Chao-Yang Huang
- Department of Safety, Health and Environmental Engineering, Hung Kuang University, Sha-Lu, Taichung, 433, Taiwan, ROC
| | - You-Fu Xiao
- Department of Safety, Health and Environmental Engineering, Hung Kuang University, Sha-Lu, Taichung, 433, Taiwan, ROC
| | - Kai-Hsiang Tsai
- Department of Safety, Health and Environmental Engineering, Hung Kuang University, Sha-Lu, Taichung, 433, Taiwan, ROC
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26
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Heideman PD, Flores KA, Sevier LM, Trouton KE. Effectiveness and Adoption of a Drawing-to-Learn Study Tool for Recall and Problem Solving: Minute Sketches with Folded Lists. CBE LIFE SCIENCES EDUCATION 2017; 16:16/2/ar28. [PMID: 28495932 PMCID: PMC5459246 DOI: 10.1187/cbe.16-03-0116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 03/08/2017] [Accepted: 03/21/2017] [Indexed: 06/07/2023]
Abstract
Drawing by learners can be an effective way to develop memory and generate visual models for higher-order skills in biology, but students are often reluctant to adopt drawing as a study method. We designed a nonclassroom intervention that instructed introductory biology college students in a drawing method, minute sketches in folded lists (MSFL), and allowed them to self-assess their recall and problem solving, first in a simple recall task involving non-European alphabets and later using unfamiliar biology content. In two preliminary ex situ experiments, students had greater recall on the simple learning task, non-European alphabets with associated phonetic sounds, using MSFL in comparison with a preferred method, visual review (VR). In the intervention, students studying using MSFL and VR had ∼50-80% greater recall of content studied with MSFL and, in a subset of trials, better performance on problem-solving tasks on biology content. Eight months after beginning the intervention, participants had shifted self-reported use of drawing from 2% to 20% of study time. For a small subset of participants, MSFL had become a preferred study method, and 70% of participants reported continued use of MSFL. This brief, low-cost intervention resulted in enduring changes in study behavior.
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Affiliation(s)
- Paul D Heideman
- Department of Biology, College of William and Mary, Williamsburg, VA 23187
| | - K Adryan Flores
- Department of Biology, College of William and Mary, Williamsburg, VA 23187
| | - Lu M Sevier
- Department of Biology, College of William and Mary, Williamsburg, VA 23187
| | - Kelsey E Trouton
- Department of Biology, College of William and Mary, Williamsburg, VA 23187
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27
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Xu L, Yuan L. A Parametric Bootstrap Solution to Two-way MANOVA without Interaction under Heteroscedasticity: Fixed and Mixed Models. COMMUN STAT-SIMUL C 2016. [DOI: 10.1080/03610918.2014.930906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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28
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Xu L, Qu K, Wu M, Mei B, Chen R. Parametric Bootstrap Tests for Unbalanced Three-factor Nested Designs under Heteroscedasticity. COMMUN STAT-SIMUL C 2016. [DOI: 10.1080/03610918.2013.862276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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29
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Kaugars KE, Rivers CI, Saha MS, Heideman PD. Genetic variation in total number and locations of GnRH neurons identified using in situ hybridization in a wild-source population. ACTA ACUST UNITED AC 2015; 325:106-15. [PMID: 26699837 DOI: 10.1002/jez.2000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Revised: 11/12/2015] [Accepted: 11/13/2015] [Indexed: 12/29/2022]
Abstract
The evolution of brain function in the regulation of physiology may depend in part upon the numbers and locations of neurons. Wild populations of rodents contain natural genetic variation in the inhibition of reproduction by winter-like short photoperiod, and it has been hypothesized that this functional variation might be due in part to heritable variation in the numbers or location of gonadotropin releasing hormone (GnRH) neurons. A naturally variable wild-source population of white-footed mice was used to develop lines artificially selected for or against mature gonads in short, winter-like photoperiods. We compared a selection line that is reproductively inhibited in short photoperiod (Responsive) to a line that is weakly inhibited by short photoperiod (Nonresponsive) for differences in counts of neurons identified using in situ hybridization for GnRH mRNA. There was no effect of photoperiod, but there were 60% more GnRH neurons in total in the Nonresponsive selection line than the Responsive selection line. The lines differed specifically in numbers of GnRH neurons in more anterior regions, whereas numbers of GnRH neurons in posterior areas were not statistically different between lines. We compare these results to those of an earlier study that used immunohistochemical labeling for GnRH neurons. The results are consistent with the hypothesis that the selection lines and natural source population contain significant genetic variation in the number and location of GnRH neurons. The variation in GnRH neurons may contribute to functional variation in fertility that occurs in short photoperiods in the laboratory and in the wild source population in winter.
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Affiliation(s)
| | - Charlotte I Rivers
- Department of Biology, College of William and Mary, Williamsburg, Virginia
| | - Margaret S Saha
- Department of Biology, College of William and Mary, Williamsburg, Virginia
| | - Paul D Heideman
- Department of Biology, College of William and Mary, Williamsburg, Virginia
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30
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Yue LL, Shi JH, Song WX. A parametric bootstrap approach for two-way error component regression models. COMMUN STAT-SIMUL C 2015. [DOI: 10.1080/03610918.2015.1073304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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31
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Dovoedo YH, Chakraborti S. On the robustness to symmetry of some nonparametric multivariate one-sample sign-type tests. J STAT COMPUT SIM 2015. [DOI: 10.1080/00949655.2015.1092540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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32
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33
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Parametric bootstrap approaches for two-way MANOVA with unequal cell sizes and unequal cell covariance matrices. J MULTIVARIATE ANAL 2015. [DOI: 10.1016/j.jmva.2014.09.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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34
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Zhang G. Simultaneous confidence intervals for pairwise multiple comparisons in a two-way unbalanced design with unequal variances. J STAT COMPUT SIM 2014. [DOI: 10.1080/00949655.2014.935735] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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35
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Pauly M, Brunner E, Konietschke F. Asymptotic permutation tests in general factorial designs. J R Stat Soc Series B Stat Methodol 2014. [DOI: 10.1111/rssb.12073] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Markus Pauly
- Heinrich-Heine University of Duesseldorf; Germany
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36
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Sadooghi-Alvandi S, Malekzadeh A. Simultaneous confidence intervals for ratios of means of several lognormal distributions: A parametric bootstrap approach. Comput Stat Data Anal 2014. [DOI: 10.1016/j.csda.2013.07.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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