scholarly journals Statistical trajectory models for phonetic classification

1994 ◽  
Vol 95 (5) ◽  
pp. 2876-2876 ◽  
Author(s):  
William Goldenthal ◽  
James Glass
Keyword(s):  
Trajectory Models ◽  
Phonetic Classification

scholarly journals Treating branch cuts in quantum trajectory models for photoelectron holography

2018 ◽  
Vol 98 (6) ◽  
Author(s):  
A. S. Maxwell ◽  
S. V. Popruzhenko ◽  
C. Figueira de Morisson Faria
Keyword(s):  
Quantum Trajectory ◽  
Trajectory Models ◽  
Branch Cuts

scholarly journals Group-Based Trajectory Models: Assessing Adherence to Antihypertensive Medication in Older Adults in a Community Pharmacy Setting

2017 ◽  
Vol 103 (6) ◽  
pp. 1052-1060 ◽  
Author(s):  
Paul Dillon ◽  
Derek Stewart ◽  
Susan M. Smith ◽  
Paul Gallagher ◽  
Gráinne Cousins
Keyword(s):  
Older Adults ◽  
Community Pharmacy ◽  
Antihypertensive Medication ◽  
Trajectory Models ◽  
Pharmacy Setting

Experimental Research for Breakthrough Position of Horizontal Wells in Reservoirs with Bottom Water

2012 ◽  
Vol 524-527 ◽  
pp. 1232-1235 ◽  
Author(s):  
Li Feng Li ◽  
Xiang An Yue ◽  
Li Juan Zhang
Keyword(s):  
Pressure Drop ◽  
Bottom Water ◽  
Horizontal Wells ◽  
Concave Part ◽  
Entry Points ◽  
Heterogeneous Models ◽  
Two Factors ◽  
Well Trajectory ◽  
Trajectory Models ◽  
Swept Area

Finding the breakthrough position of horizontal wells is essential to water plugging and improving oil production in bottom water drive reservoirs. Physical modeling was carried out in this paper to research the law of bottom water’s movement. The experimental results indicated that: pressure drop in wells, well trajectory and area reservoir heterogeneity were all sensitive factors for breakthrough of bottom water, and the entry points of horizontal wells were determined by the combined function of them. In different well trajectory models, the concave down part of the well cooperate with pressure drop influenced the breakthrough position. Bottom water below the heel end reached the well earliest if the concave down part located at the heel end. When the concave part located at the middle of the well, the two factors played role respectively which resulted in breaking through of bottom water at two places with larger swept area. In different heterogeneous models, permeability difference and pressure drop were both favorable factors for bottom water’s non-uniformly rise. In the model that the heel end located at high permeability part, bottom water under the heel end reached the well earliest. If the heel end was set at the low permeability part, the breakthrough of bottom water occurred at the middle of the well.

Examining the Coevolution of Drug Use Variety and Different Types of Offending Frequency Among Justice-Involved Adolescents

2021 ◽  
pp. 002204262110022
Author(s):  
Benjamin T. Kuettel
Keyword(s):  
Drug Use ◽  
Criminal Behavior ◽  
General Pattern ◽  
Past Research ◽  
Criminal Offending ◽  
Developmental Patterns ◽  
Violent Offending ◽  
Different Types ◽  
Trajectory Models ◽  
Frequent Offenders

Past research demonstrates a strong link between drug use and crime among justice-involved adolescents, yet little is known about the joint development between drug use variety and various types of criminal offending frequencies from adolescence to young adulthood. Using a sample of male adolescent offenders ( N = 842), this article examines the coevolution of drug use variety and three separate types of offending frequencies. First, four group-based trajectory models identify unique group developmental patterns for drug use variety, drug sales offending, property offending, and violent offending. Next, three dual-trajectory models examine the coevolution between drug use variety and each type of criminal offending. Findings reveal a general pattern of desistance for both drug use and offending, while also illustrating notable variability in group trajectory patterns for drug use variety and criminal behavior. This article concludes that adolescents with elevated drug use variety make up a large proportion of frequent offenders.

scholarly journals How consistently does sleep quality improve at retirement? Prospective analyses with group‐based trajectory models

2021 ◽  
Author(s):  
Paraskevi Peristera ◽  
Anna Nyberg ◽  
Linda L. Magnusson Hanson ◽  
Hugo Westerlund ◽  
Loretta G. Platts
Keyword(s):  
Sleep Quality ◽  
Trajectory Models ◽  
Prospective Analyses

Abstract P161: Variation in Five-Year Weight Loss Patterns Following Bariatric Surgery by Insurance Status

Circulation ◽  
2017 ◽  
Vol 135 (suppl_1) ◽  
Author(s):  
Erin Takemoto ◽  
Bruce Wolfe ◽  
Corey Nagel ◽  
Janne Boone-Heinonen
Keyword(s):  
Bariatric Surgery ◽  
Weight Loss ◽  
Parameter Estimates ◽  
Similar Amount ◽  
Group Model ◽  
Specific Patient ◽  
Group 6 ◽  
Medicaid Beneficiaries ◽  
Trajectory Models

In the general population, bariatric surgery facilitates sustained weight loss and remission of comorbidities (e.g., CVD). The effectiveness among Medicaid beneficiaries, a population with a disproportionately high burden of obesity, remains unclear. We sought to determine if patterns of weight change following bariatric surgery differed in patients with Medicaid compared to commercial insurance. Data were obtained from the Longitudinal Assessment of Bariatric Surgery, an observational cohort study of adults undergoing bariatric surgery (2006-2009) at one of 6 geographically diverse centers. We used group-based trajectory models (PROC TRAJ, SAS) to identify discrete groups of individuals with similar weight trajectories over 5-years; we considered cubic trajectory models with between 1 and 6 groups. We selected the 6-group model based on Bayesian Information Criteria, visual fit and statistical significance of parameter estimates. We tested demographic predictors against trajectory group membership; Medicaid (n=174) vs. Commercial (n=991) was our primary predictor of interest. Medicaid participants had higher mean weight at baseline compared to the commercially insured (307.9 vs. 291.2 lbs), but lost a similar amount of weight over time (74.8 vs 85.0 lbs). All groups experienced the most weight loss in year 1 (Figure). Group 6 was the heaviest at baseline and began to regain weight after year 1; groups 1-5 continued to lose weight through year 2. Group’s 1 & 2 weight remained stable over 5 years while groups 3-6 began to slowly regain weight. Medicaid beneficiaries were more likely to be in group 4 (OR 3.2, 95% CI: 1.2, 8.6), group 5 (OR 5.7, 95% CI: 2.0, 16.1) and group 6 (OR 7.9, 95% CI: 2.5, 25.1) compared to group 1. Medicaid beneficiaries experience substantial long term weight loss. However, they had higher baseline weight and tended to be in groups with less long-term weight loss compared to the commercially insured. Focusing on tailored interventions to specific patient groups could help maintain weight loss.

scholarly journals Learning Probabilistic Trajectory Models of Aircraft in Terminal Airspace From Position Data

2019 ◽  
Vol 20 (9) ◽  
pp. 3536-3545 ◽  
Author(s):  
Shane T. Barratt ◽  
Mykel J. Kochenderfer ◽  
Stephen P. Boyd
Keyword(s):  
Position Data ◽  
Trajectory Models

scholarly journals Trajectories of Unsecured Debt across the Life Course and Mental Health at Midlife

2018 ◽  
Vol 10 (1) ◽  
pp. 61-79 ◽  
Author(s):  
Amy Ruining Sun ◽  
Jason N. Houle
Keyword(s):  
Mental Health ◽  
Depressive Symptoms ◽  
Life Course ◽  
Debt Accumulation ◽  
Unsecured Debt ◽  
Trajectory Models ◽  
Low Levels ◽  
Using Data ◽  
The Life Course ◽  
Substantial Heterogeneity

In this paper, we contribute to a growing literature on debt and mental health and ask whether patterns of unsecured debt accumulation and repayment over two decades are associated with depressive symptoms at age 50. Using data from the National Longitudinal Study of Youth 1979 Cohort and group trajectory models, we have three key findings. First, we find substantial heterogeneity in debt trajectories across the life course. Second, respondents who report consistently high debt levels across the life course or who cycle in and out of high debt report significantly more depressive symptoms than respondents who hold consistently low levels of debt. These findings hold for both absolute and relative (debt-to-income) debt. Third, we find that the association between debt and depressive symptoms is strongest among respondents with less than a college degree, but we find less evidence for heterogeneity by race in this cohort.

scholarly journals Brief Communication: Measuring rock decelerations and rotation changes during short-duration ground impacts

2018 ◽  
Vol 18 (11) ◽  
pp. 3145-3151 ◽  
Author(s):  
Andrin Caviezel ◽  
Werner Gerber
Keyword(s):  
Short Duration ◽  
Hazard Mitigation ◽  
Highly Nonlinear ◽  
Nonlinear Character ◽  
Trajectory Models ◽  
Natural Terrain ◽  
Lack Of Knowledge

Abstract. Rockfall trajectories are primarily influenced by ground contacts, causing changes in acceleration and rock rotation. The duration of contacts and its influence on the rock kinematics are highly variable and generally unknown. The lack of knowledge hinders the development and calibration of physics-based rockfall trajectory models needed for hazard mitigation. To address this problem we placed three-axis gyroscopes and accelerometers in rocks of various sizes and shapes with the goal of quantifying rock deceleration in natural terrain. Short ground contacts range between 8 and 15 ms, longer contacts between 50 and 70 ms, totalling to only 6 % of the runtime. Our results underscore the highly nonlinear character of rock–ground interactions.

A graphical method to assess distribution assumption in group-based trajectory models

2013 ◽  
Vol 25 (2) ◽  
pp. 968-982 ◽  
Author(s):  
Mad-Hélénie Elsensohn ◽  
Amna Klich ◽  
René Ecochard ◽  
Mathieu Bastard ◽  
Christophe Genolini ◽  
...  
Keyword(s):  
Graphical Method ◽  
Trajectory Models ◽  
Distribution Assumption
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