Field test results of an automated exposure assessment tool, the local positioning system (LPS)

Purpose The purposes of this study were (a) to introduce “language access profiles” as a viable alternative construct to “communication mode” for describing experience with language input during early childhood for deaf and hard-of-hearing (DHH) children; (b) to describe the development of a new tool for measuring DHH children's language access profiles during infancy and toddlerhood; and (c) to evaluate the novelty, reliability, and validity of this tool. Method We adapted an existing retrospective parent report measure of early language experience (the Language Exposure Assessment Tool) to make it suitable for use with DHH populations. We administered the adapted instrument (DHH Language Exposure Assessment Tool [D-LEAT]) to the caregivers of 105 DHH children aged 12 years and younger. To measure convergent validity, we also administered another novel instrument: the Language Access Profile Tool. To measure test–retest reliability, half of the participants were interviewed again after 1 month. We identified groups of children with similar language access profiles by using hierarchical cluster analysis. Results The D-LEAT revealed DHH children's diverse experiences with access to language during infancy and toddlerhood. Cluster analysis groupings were markedly different from those derived from more traditional grouping rules (e.g., communication modes). Test–retest reliability was good, especially for the same-interviewer condition. Content, convergent, and face validity were strong. Conclusions To optimize DHH children's developmental potential, stakeholders who work at the individual and population levels would benefit from replacing communication mode with language access profiles. The D-LEAT is the first tool that aims to measure this novel construct. Despite limitations that future work aims to address, the present results demonstrate that the D-LEAT represents progress over the status quo.

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Long Term Field Test Results of Experimental EPDM and PUF Roofing

10.21236/ada226197 ◽

1990 ◽

Author(s):

David M. Bailey ◽

Stuart D. Foltz ◽

Myer J. Rosenfield

Keyword(s):

Field Test ◽

Test Results ◽

Term Field

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Identifying Personality Disorders that are Security Risks: Field Test Results

10.21236/ada564011 ◽

2011 ◽

Cited By ~ 3

Author(s):

Olga G. Shechter ◽

Eric L. Lang

Keyword(s):

Personality Disorders ◽

Field Test ◽

Test Results ◽

Security Risks

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Synthesis and Experimental Accuracy Assessment of Kalman Filter Algorithm for UWB ToA Local Positioning System

2021 3rd International Youth Conference on Radio Electronics, Electrical and Power Engineering (REEPE) ◽

10.1109/reepe51337.2021.9388007 ◽

2021 ◽

Author(s):

Nikita Petukhov ◽

Alexander Chugunov ◽

Vladimir Zamolodchikov ◽

Dmitry Tsaregorodtsev ◽

Ilya Korogodin

Keyword(s):

Kalman Filter ◽

Accuracy Assessment ◽

Positioning System ◽

Experimental Accuracy ◽

Local Positioning System ◽

Kalman Filter Algorithm

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Measuring Gait Velocity and Stride Length with an Ultrawide Bandwidth Local Positioning System and an Inertial Measurement Unit

Sensors ◽

10.3390/s21092896 ◽

2021 ◽

Vol 21 (9) ◽

pp. 2896

Author(s):

Pratham Singh ◽

Michael Esposito ◽

Zach Barrons ◽

Christian A. Clermont ◽

John Wannop ◽

...

Keyword(s):

Gold Standard ◽

Gait Speed ◽

Inertial Measurement Unit ◽

Stride Length ◽

Measurement Unit ◽

Gait Velocity ◽

Positioning System ◽

Inertial Measurement ◽

Measurement Systems ◽

Local Positioning System

One possible modality to profile gait speed and stride length includes using wearable technologies. Wearable technology using global positioning system (GPS) receivers may not be a feasible means to measure gait speed. An alternative may include a local positioning system (LPS). Considering that LPS wearables are not good at determining gait events such as heel strikes, applying sensor fusion with an inertial measurement unit (IMU) may be beneficial. Speed and stride length determined from an ultrawide bandwidth LPS equipped with an IMU were compared to video motion capture (i.e., the “gold standard”) as the criterion standard. Ninety participants performed trials at three self-selected walk, run and sprint speeds. After processing location, speed and acceleration data from the measurement systems, speed between the last five meters and stride length in the last stride of the trial were analyzed. Small biases and strong positive intraclass correlations (0.9–1.0) between the LPS and “the gold standard” were found. The significance of the study is that the LPS can be a valid method to determine speed and stride length. Variability of speed and stride length can be reduced when exploring data processing methods that can better extract speed and stride length measurements.

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Estimation of Outdoor PM2.5 Infiltration into Multifamily Homes Depending on Building Characteristics Using Regression Models

Sustainability ◽

10.3390/su13105708 ◽

2021 ◽

Vol 13 (10) ◽

pp. 5708

Author(s):

Bo-Ram Park ◽

Ye-Seul Eom ◽

Dong-Hee Choi ◽

Dong-Hwa Kang

Keyword(s):

Regression Analysis ◽

Correlation Analysis ◽

Field Test ◽

Outer Surface ◽

Regression Models ◽

Field Tests ◽

Test Results ◽

Correlation And Regression Analysis ◽

Building Characteristics ◽

Pm2.5 Concentration

The purpose of this study was to evaluate outdoor PM2.5 infiltration into multifamily homes according to the building characteristics using regression models. Field test results from 23 multifamily homes were analyzed to investigate the infiltration factor and building characteristics including floor area, volume, outer surface area, building age, and airtightness. Correlation and regression analysis were then conducted to identify the building factor that is most strongly associated with the infiltration of outdoor PM2.5. The field tests revealed that the average PM2.5 infiltration factor was 0.71 (±0.19). The correlation analysis of the building characteristics and PM2.5 infiltration factor revealed that building airtightness metrics (ACH50, ELA/FA, and NL) had a statistically significant (p < 0.05) positive correlation (r = 0.70, 0.69, and 0.68, respectively) with the infiltration factor. Following the correlation analysis, a regression model for predicting PM2.5 infiltration based on the ACH50 airtightness index was proposed. The study confirmed that the outdoor-origin PM2.5 concentration in highly leaky units could be up to 1.59 times higher than that in airtight units.

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An IR local positioning system for smart items and devices

23rd International Conference on Distributed Computing Systems Workshops, 2003. Proceedings. ◽

10.1109/icdcsw.2003.1203576 ◽

2004 ◽

Cited By ~ 40

Author(s):

E. Aitenbichler ◽

M. Muhlhauser

Keyword(s):

Positioning System ◽

Local Positioning System

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Biomonitoring of Fusarium spp. Mycotoxins: Perspectives for an Individual Exposure Assessment Tool

Food Science and Technology International ◽

10.1177/1082013210368884 ◽

2010 ◽

Vol 16 (3) ◽

pp. 266-276 ◽

Cited By ~ 14

Author(s):

G. Cano-Sancho ◽

S. Marin ◽

A.J. Ramos ◽

V. Sanchis

Keyword(s):

Exposure Assessment ◽

Dietary Habits ◽

Assessment Tool ◽

Fusarium Species ◽

Risk Groups ◽

Probabilistic Methods ◽

Fusarium Spp ◽

Individual Exposure ◽

The Individual ◽

Current Exposure

Fusarium species are probably the most prevalent toxin-producing fungi of the northern temperate regions and are commonly found on cereals grown in the temperate regions of America, Europe and Asia. Among the toxins formed by Fusarium we find trichothecenes of the A-type or B-type, zearalenone, fumonisins or nivalenol. The current exposure assessment consists of the qualitative and/or quantitative evaluation based on the knowledge of the mycotoxin occurrence in the food and the dietary habits of the population. This process permits quantifying the mycotoxin dietary intake through deterministic or probabilistic methods. Although these methods are suitable to assess the exposure of populations to contaminants and to identify risk groups, they are not recommended to evaluate the individual exposition, due to a low accuracy and sensitivity. On the contrary, the use of biochemical indicators has been proposed as a suitable method to assess individual exposure to contaminants. In this work, several techniques to biomonitor the exposure to fumonisins, deoxynivalenol, zearalenone or T-2 toxin have been reviewed.

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