Mobility Measurements Research Articles

German Version of the Mobile Agnew Relationship Measure: Translation and Validation Study.

The mobile Agnew Relationship Measure (mARM) is a self-report questionnaire for the evaluation of digital mental health interventions and their interactions with users. With the global increase in digital mental health intervention research, translated measures are required to conduct research with local populations. The aim of this study was to translate and validate the original English version of the mARM into a German version (mARM-G). A total of 2 native German speakers who spoke English as their second language conducted forward translation of the original items. This version was then back translated by 2 native German speakers with a fluent knowledge of English. An independent bilingual reviewer then compared these drafts and created a final German version. The mARM-G was validated by 15 experts in the field of mobile app development and 15 nonexperts for content validity and face validity; 144 participants were recruited to conduct reliability testing as well as confirmatory factor analysis. The content validity index of the mARM-G was 0.90 (expert ratings) and 0.79 (nonexperts). The face validity index was 0.89 (experts) and 0.86 (nonexperts). Internal consistency for the entire scale was Cronbach α=.91. Confirmatory factor analysis results were as follows: the chi-square statistic to df ratio was 1.66. Comparative Fit Index was 0.87 and the Tucker-Lewis Index was 0.86. The root mean square error of approximation was 0.07. The mARM-G is a valid and reliable tool that can be used for future studies in German-speaking countries.

Physical attractiveness and intergenerational social mobility

AbstractObjectivePhysical attractiveness is often studied in relation to various life outcomes, but there is a lack of research on its links to intergenerational educational, occupational, and income mobility. Individuals may use physical attractiveness as one of the channels for experiencing upward or avoiding downward social mobility.MethodsUsing data about 11,583 individuals from the United States National Longitudinal Study of Adolescent Health, we contribute to the existing scholarship by investigating if physical attractiveness, assessed when individuals are around 15 years old, is an important predictor of intergenerational social mobility measured after 20 years.ResultsWe find that physical attractiveness matters both for males’ and females’ intergenerational social mobility outcomes, but it is more important for males, even when childhood characteristics, such as various aspects of parental socioeconomic position, individuals’ health, a proxy for IQ, neighborhood conditions, and interviewers’ fixed effects, are accounted for using imputed data for observations with missing information. Across three measures of social mobility—education, occupation, and income—physically attractive males are more likely to be socially mobile than males of average attractiveness.ConclusionPhysical attractiveness is an independent predictor of intergenerational social mobility outcomes regarding individuals’ educational, occupational, and income attainment.

Methane emission mapping and quantification in two medium-sized cities in Germany: Heidelberg and Schwetzingen

Estimating the contribution of cities to regional and global methane (CH4) budgets is challenging due to the complex infrastructures of cities. Mobile measurement devices are well suited to detect CH4 sources via real-time ambient air measurements. Surveys involving mobile CH4 measurements were conducted from May 2020 to July 2021 at the street level in two medium-sized cities in Germany. With coverage levels of 30% and 65% of the road networks in Heidelberg and Schwetzingen, respectively, Leak Indications (LIs) for CH4 were observed with mole fractions of 100 to 9500 ppb above background. A minor portion of leaks (2 out of 70) was attributed to the sewer system, but most leaks originated from the gas distribution network with 0.48 LIs per km obtained in Heidelberg and 0.08 LIs per km determined in Schwetzingen. A method to assign an emission rate to all LIs developed by Weller et al. (2019) was assessed and adapted via controlled CH4 release experiments in Heidelberg. The method was modified for cities with smaller street widths and smaller distances from the leak to the measurement device. The annual total street-level CH4 emissions calculated for Heidelberg and Schwetzingen were 42 ± 17 and 1.5 ± 0.5 t CH4 yr−1 (1sigma), respectively, corresponding to 0.26 ± 0.11 and 0.03 ± 0.01 kg CH4 yr−1 per capita, respectively.

Inaccuracy of Initial Clinical Mobility Assessment in Venous Thromboembolism Risk Stratification

Background: The risk of Venous Thromboembolism (VTE) often escalates in hospital settings in part due to reduced patient mobility. However, mobility assessment for VTE risk determination is often clouded by lack of clear definitions and standards. This vagueness can result in erroneous evaluations, especially near the time of admission, particularly since a patient's mobility is not static but fluctuates throughout the hospital stay. Methods: We conducted a retrospective cohort analysis of patients who were discharged from medicine services in a large academic hospital. For each of these patients, daily nurse-collected Johns Hopkins-Highest Level of Mobility (JH-HLM) scores were used to calculate an objective measure of mobility. Reduced mobility was defined as an JH-HLM score of ≤3 on three consecutive days during hospitalization. We compared this definition of reduced mobility with clinician reported immobility as reflected by Padua scores entered on admission as part of mandatory VTE risk stratification. We also assessed the association between immobility and VTE using an adjusted odds ratio controlling for other VTE risk factors. Results: Out of 1715 included patients, clinicians identified only 111 (6.5%) as having reduced mobility compared with 328 patients (19.1%) using the JH-HLM calculated approach. If the JH-HLM calculated measure of reduced mobility had been utilized, it would have led to the reclassification of 37 patients from a low-risk category to a high-risk category for VTE. In the cohort, 33 of 1715 (1.9%) patients developed VTE. Among these patients, JH-HLM calculated reduced mobility was identified in 12/33 (36%) of patients, whereas clinicians identified reduced mobility in 3/33 (9%) of patients. Presence of JH-HLM calculated reduced mobility was significantly associated with VTE events (aOR: 2.53, 95% CI: 1.23 - 5.22, P = 0.012). Clinician assessed reduced mobility at the time of admission was not associated with VTE events. Conclusion: The initial clinician's assessment of mobility during VTE risk assessment did not accurately capture the extent of reduced mobility during the patient's hospitalization. These findings highlight the importance of employing objective measures of patient mobility for assessing and reassessing VTE risk throughout the hospital stay. Healthcare organizations should consider implementing objective measures of mobility like the JH-HLM to improve VTE risk assessment and potentially reduce the occurrence of VTE.

1 Benefits of Speed of Processing Training in Older Adults

Objective:Physical, sensory, and cognitive function are all related to successful aging, quality of life, and independence in older age. Decline in cognitive function, in particular, can create difficulty in many Instrumental Activities of Daily Living such as driving and other aspects of everyday function. Loss of driving competence can subsequently lead to depression, isolation, loss of independence and reduced quality of life. Results from a large randomized controlled trial investigating the long-term impact of Speed of Processing Training will be presented demonstrating the impact of such training on cognitive and everyday function. Speed of Processing Training is an adaptive cognitive intervention administered on a computer that improves visual attention, and has been shown to enhance the connections needed for visual attention using task-driven and resting state fMRI.Participants and Methods:The ACTIVE clinical trial recruited a volunteer sample of 2,832 community dwelling older adults between the ages of 65 and 94 years at six different field sites in six different states. This study evaluated the impact of three cognitive interventions targeted at improving cognitive and everyday function which served as contract control conditions for each other. Participants were randomly assigned to speed of processing training, reasoning training, memory training, or a no-contact control group. Follow-up testing was collected in person for ten years, and at twenty years final archival data was collected from the Departments of Motor Vehicles at each of the six field sites, as well as the Medicare/Medicaid data across the twenty years since enrollment. Outcomes included measures of cognitive function, measures of IADL (including crash involvement and driving cessation), and secondary outcomes of mobility (falls, driving habits, life space), quality of life, mortality and health conditions (from Medicare Records).Results:Results will be presented with respect to everyday function including several longitudinal measures of mobility: number of miles driven per year and driving difficulty, rates of driving cessation, and crash involvement. Random effects modelling, cox proportional hazards, and rate ratios will be presented illustrating the positive impact of cognitive training on these outcome measures. In particular, Speed of Processing Training was found to sustain driving competence with respect to continued driving relative to other types of training, and to reduce the risk of crash involvement over ten years. Furthermore, decline in Speed of Processing was the only cognitive measure predictive of crash involvement longitudinally in the no-contact control group. Positive benefits were also observed for Health Related Quality of Life (HRQoL), and depression.Conclusions:The ACTIVE clinical trial, among other studies, has demonstrated that cognitive training can have long-term positive benefit on the everyday abilities, quality of life, and continued independence of older adults.

A Method-Comparison Study Highlighting the Disparity between Osseous- and Skin-Based Measures of Foot Mobility.

This study examined the validity of standard clinical measures of arch height mobility, midfoot width mobility (MWM), and foot mobility magnitude (FMM) relative to skin-based and osseous measures derived from radiographs. Skin-based clinical indices of foot mobility were calculated from standard, caliper-based measures of foot length, midfoot width, and dorsal arch height of the left limb of 20 healthy participants (8-71 yr) during non-weight-bearing and weight-bearing. Skin-based radiographic and osseous indices were derived from concurrent anteroposterior and lateral radiographs. Agreement between skin-based clinical and skin-based radiographic measures of foot mobility with those of osseous measures was investigated using the Bland and Altman approach. Foot mobility indices derived from clinical measures were significantly higher (20%-50%) than skin-based radiographic measures ( P < 0.01), which were, in turn, significantly higher (200%-250%) than osseous measures ( P < 0.01). Clinical measures demonstrated significant levels of proportional bias compared with radiographic measures of foot mobility ( P < 0.01). The contribution of osseous movement to skin-based clinical measures of mobility was highly variable between individuals, ranging between 19% and 81% for arch height mobility, between 4% and 87% for MWM, and between 14% and 75% for FMM. The limits of tolerance for clinical measures of foot mobility ranged from ±3.2 mm for MWM to ±6.6 mm for measures of FMM. The limits of tolerance for skin-based clinical and skin-based radiographic measures were generally larger than osseous movement with weight-bearing. Skin-based measures of foot mobility, whether clinical or radiographic methods, are not interchangeable and are poor indicators of osseous mobility. Although further research regarding the utility of osseous measures is warranted, these findings strongly caution against the use of skin-based clinical measures of foot mobility in clinical and research settings.

Impact of an INtervention to increase MOBility in older hospitalized medical patients (INTOMOB): Study protocol for a cluster randomized controlled trial

BackgroundLow mobility during an acute hospitalization is frequent and associated with adverse effects, including persistent functional decline, institutionalization and death. However, we lack effective interventions to improve mobility that are scalable in everyday practice. The INTOMOB trial – INtervention to increase MOBility in older hospitalized medical patients – will test the effect of a multilevel intervention to improve mobility of older hospitalized patients on functional mobility.MethodsThe INTOMOB multicenter superiority parallel cluster randomized controlled trial will enroll in total 274 patients in Swiss hospitals. Community-dwelling adults aged ≥ 60 years, admitted to a general internal medicine ward with an anticipated length of hospital stay of ≥ 3 days, will be eligible for participation. Unit of randomization will be the wards. A multilevel mobility intervention will be compared to standard of care and target the patients (information and exercise booklets, mobility diary, iPad with exercise videos), healthcare professionals (e-learning, oral presentation, mobility checklist), and environment (posters and pictures on the wards). The primary outcome will be life-space level, measured by the University of Alabama at Birmingham Study of Aging Life-Space Assessment (LSA), at 30 days after enrollment. The LSA is a measure of functional mobility, i.e., how far participants move from bedroom to outside town. Secondary outcomes include, among others, LSA at 180 days, mobility and falls during hospitalization, muscle strength at discharge, and falls, emergency room visits, readmissions, and death within 180 days.DiscussionThis study has the potential to improve outcomes of older hospitalized patients through an intervention that should be scalable in clinical practice because it fosters patient empowerment and does not require additional resources. The tools provided to the patients can help them implement better mobility practices after discharge, which can contribute to better functional outcomes. The choice of a functional patient-reported outcome measure as primary outcome (rather than a “simple” objective mobility measure) reinforces the patient-centeredness of the study.Trial registrationclinicaltrials.gov (NCT05639231, released on December 19 2022); Swiss National Clinical Trial Portal (SNCTP000005259, released on November 28 2022).

The 4DBODY system as a new tool for chest mobility assessment in patients with ankylosing spondylitis.

Ankylosing spondylitis (AS) is a chronic inflammatory, progressive disease, which leads to deterioration of chest and spine mobility and decrease of physical capacity with abnormal chest movement patterns. We aimed to assess the usefulness of the 4DBODY technology for evaluation of the effectiveness of AS treatment. The 4DBODY technology was assessed on single AS patient with axial involvement. The patient was examined twice, before and after 14 days of rehabilitation. Physiotherapeutic and plethysmographic examinations were used, as well as angular measurement of spine curvatures and measurement of chest mobility. Chest activity measured using the 4DBODY system and the quality of movement were visualized. There was observed an increase of chest mobility from 18 mm to 27.9 mm (up 55%) in the 4DBODY system measurement. The quality of the chest movement also improved, the required phases of inspiration were synchronized. The angular position of the spine has also changed. The chest expansion improved from 25 mm to 50 mm measured on the level of the fourth intercostal space and from 30 mm to 50 mm at the Th10 level. Inspiratory and expiratory muscle strength increased respectively from 80% to 93% and from 46% to 86% of the predicted values. Total airway resistance (Rtot) - increase from 59% to 67%, whereas functional residual capacity (FRC) and total lung capacity (TLC) did not change significantly. The new 4DBODY technology was found to be an effective method of examination and assessment of the effectiveness of rehabilitation of patients with AS.

Mobile Laboratory Investigations of Industrial Point Source Emissions during the MOOSE Field Campaign

Industrial emissions of trace gases and VOCs can be an important contributor to air quality in cities. Disentangling different point sources from each other and characterizing their emissions can be particularly challenging in dense industrial areas, such as Detroit, Dearborn and surrounding areas in Southeast Michigan (SEMI). Here, we leverage mobile measurements of trace gases and speciated volatile organic compounds (VOCs) to identify emitting sites. We characterize their complicated emissions fingerprints based on a core set of chemical ratios. We report chemical ratios for 7 source types including automakers, steel manufacturers, chemical refineries, industrial chemical use (cleaning; coatings; etc.), chemical waste sites, compressor stations, and more. The source dataset includes visits to over 85 distinct point sources. As expected, we find similarities between the different types of facilities, but observe variability between them and even at individual facilities day-to-day. Certain larger sites are better thought of as a collection of individual point sources. These results demonstrate the power of mobile laboratories over stationary sampling in dense industrial areas.

Mini-augmented glenoid baseplate and mini-humeral tray reverse total shoulder arthroplasty implant comparisons: two-year clinical outcomes.

Augmented glenoid baseplate and offset humeral tray reverse total shoulder arthroplasty (RTSA) implants may decrease the mechanical impingement that creates scapular notching andimprove shoulder function. This study evaluated the clinical efficacy of three different RTSA glenoid baseplate and offset humeral tray combinations for patient-reported shoulder function, pain and instability, radiographic imaging evidence of glenoid baseplate or humeral stem subsidence and migration, bony changes associated with implant loosening, and scapular notching over the initial 2years post-RTSA. Primary outcomes included active shoulder mobility, perceived function, pain, instability, scapular notching, and implant survival. Sixty-seven patients from 6 research sites received one of three different glenoid baseplate and humeral tray combinations. Group 1 (n = 21) received a mini-augmented glenoid baseplate with a standard humeral tray; Group 2 (n = 23) received a standard glenoid baseplate and a mini-humeral tray with 3 trunnion offset options; Group 3 (n = 23) received both a mini-augmented glenoid baseplate and a mini-humeral tray with 3 trunnion offset options. Subjects underwent radiologic evaluation, completed the ASES scale, the EQ-5D-5L quality of life scale, VAS shoulder pain and instability questions, and active shoulder mobility measurements pre-operatively, and 6-weeks, 6-months, 1-2years post-RTSA. Improved active shoulder mobility, quality of life, perceived function, decreased shoulder pain and instability, excellent implant survival and minimal scapular notching were observed for all groups. Group 3 had better overall active shoulder mobility than the other groups and better perceived function than Group 1. The group that received the mini-augmented glenoid baseplate and mini-humeral tray combination had better overall active shoulder flexion, external rotation at 90° abduction, and internal rotation. This group also had better perceived shoulder function compared to the group that received a mini-augmented glenoid baseplate with a standard humeral tray.

A unified framework for the measurement of mobility in older persons.

Mobility is often referred to as a 'sixth vital sign' because of its ability to predict critical health outcomes in later adulthood. In the World Health Organization (WHO) World Report on Aging and Health, mobility is described as movement in all its forms whether powered by the body or a vehicle. As such, mobility encompasses basic physical actions such as getting up from a chair and walking, as well as activities such as exercising, driving and using public transportation. A plethora of measurement tools have been developed to assess various aspects of mobility; however, there is wide variability in the mobility constructs being measured which limits standardisation and meaningful comparison across studies. In this paper, we propose a comprehensive framework for measuring mobility that considers three distinct facets of mobility: perceived mobility ability ('what can you do'), actual mobility ability ('what you actually do') and locomotor capacity for mobility ('what could you do'). These three facets of mobility are rooted in the three components of healthy aging endorsed by the WHO: functional ability, intrinsic capacity and environments. By proposing a unified framework for measuring mobility based on theory and empirical evidence, we can advance the science of monitoring and managing mobility to ensure functional ability in older age.

Do human mobility network analyses produced from different location-based data sources yield similar results across scales?

The burgeoning availability of sensing technology and location-based data is driving the expansion of analysis of human mobility networks in science and engineering research, as well as in epidemic forecasting and mitigation, urban planning, traffic engineering, emergency response, and business development. However, studies employ datasets provided by different location-based data providers, and the extent to which the human mobility measures and results obtained from different datasets are comparable is not known. To address this gap, in this study, we examined three prominent location-based data sources—Spectus, X-Mode, and Veraset—to analyze human mobility networks across metropolitan areas at different scales: global, sub-structure, and microscopic. Dissimilar results were obtained from the three datasets, suggesting the sensitivity of network models and measures to datasets. This finding has important implications for building generalized theories of human mobility and urban dynamics based on different datasets. The findings also highlighted the need for ground-truthed human movement datasets to serve as the benchmark for testing the representativeness of human mobility datasets. Researchers and decision-makers across different fields of science and technology should recognize the sensitivity of human mobility results to dataset choice and develop procedures for ground-truthing the selected datasets in terms of representativeness of data points and transferability of results.

Review of the monograph: Shirokov G.A. War years of Kuibyshev region: 1941–1945: monograph. V.I. Dorofeev, O.N. Soldatova (Eds.). Samara: OOO «Nauchno-tekhnicheskii tsentr», 2022, 336 p.

The review analyses the main problems reflected in the generalizing study by G.A. Shirokov. Relying on a diverse corpus of archival and published documentary sources, periodicals, statistical materials, as well as scientific literature on the problem under study, the author distinguishes two stages in the development of the Kuibyshev region. He presents a reconstruction of the mobilization measures carried out during the first stage (1941–1942). The author reconstructs the process of formation of new branches of regional economy on the basis of industrial equipment of evacuated factories, shows the restructuring of industrial production, which led to the formation of diversified economic potential of the region. Factors that had a negative impact on the development of agricultural production are revealed. New materials are given about labour everyday life and adaptation of the population to the conditions of the war years. Characterizing the second stage (1943–1945), the author provides information on measures to introduce new technologies and conveyors at industrial enterprises, to provide qualified workers and employees, to develop agriculture and transport infrastructure. The monograph focuses on the development of health care, public education and higher education, shows social and political life of the population during the Great Patriotic War. The central problem of the monograph is the labour feat of the population of Kuibyshev region, which ensured the unity of the front and rear and the victory in May 1945.

At-home computerized executive-function training to improve cognition and mobility in normal-hearing adults and older hearing aid users: a multi-centre, single-blinded randomized controlled trial

Background Hearing loss predicts cognitive decline and falls risk. It has been argued that degraded hearing makes listening effortful, causing competition for higher-level cognitive resources needed for secondary cognitive or motor tasks. Therefore, executive function training has the potential to improve cognitive performance, in turn improving mobility, especially when older adults with hearing loss are engaged in effortful listening. Moreover, research using mobile neuroimaging and ecologically valid measures of cognition and mobility in this population is limited. The objective of this research is to examine the effect of at-home cognitive training on dual-task performance using laboratory and simulated real-world conditions in normal-hearing adults and older hearing aid users. We hypothesize that executive function training will lead to greater improvements in cognitive-motor dual-task performance compared to a wait-list control group. We also hypothesize that executive function training will lead to the largest dual-task improvements in older hearing aid users, followed by normal-hearing older adults, and then middle-aged adults.MethodsA multi-site (Concordia University and KITE-Toronto Rehabilitation Institute, University Health Network) single-blinded randomized controlled trial will be conducted whereby participants are randomized to either 12 weeks of at-home computerized executive function training or a wait-list control. Participants will consist of normal-hearing middle-aged adults (45–60 years old) and older adults (65–80 years old), as well as older hearing aid users (65–80 years old, ≥ 6 months hearing aid experience). Separate samples will undergo the same training protocol and the same pre- and post-evaluations of cognition, hearing, and mobility across sites. The primary dual-task outcome measures will involve either static balance (KITE site) or treadmill walking (Concordia site) with a secondary auditory-cognitive task. Dual-task performance will be assessed in an immersive virtual reality environment in KITE’s StreetLab and brain activity will be measured using functional near infrared spectroscopy at Concordia’s PERFORM Centre.DiscussionThis research will establish the efficacy of an at-home cognitive training program on complex auditory and motor functioning under laboratory and simulated real-world conditions. This will contribute to rehabilitation strategies in order to mitigate or prevent physical and cognitive decline in older adults with hearing loss.Trial registrationIdentifier: NCT05418998. https://clinicaltrials.gov/ct2/show/NCT05418998

Association of Race, Ethnicity, and Gender to Disparities in Functional Recovery and Social Health After Major Lower Limb Amputation: A Cross-sectional Pilot Study

ObjectiveTo assess if evidence of disparities exists in functional recovery and social health post-lower limb amputation. DesignRace-ethnicity, gender, and income-based group comparisons of functioning and social health in a convenience sample of lower limb prosthetic users. SettingProsthetic clinics in 4 states. ParticipantsA geographically diverse cohort of 56 English and Spanish speaking community-dwelling individuals with dysvascular lower limb amputation, between 18-80 years old. InterventionsNone. Main Outcomes MeasuresPrimary outcomes included 2 physical performance measures, the Timed Up and Go test and 2-minute walk test, and thirdly, the Prosthetic Limb Users Survey of Mobility. The PROMIS Ability to Participate in Social Roles and Activities survey measured social health. ResultsOf the study participants, 45% identified as persons of color, and 39% were women (mean ± SD age, 61.6 (9.8) years). People identifying as non-Hispanic White men exhibited better physical performance than men of color, White women, and women of color by -7.86 (95% CI, -16.26 to 0.53, P=.07), -10.34 (95% CI, -19.23 to –1.45, P=.02), and -11.63 (95% CI, -21.61 to –1.66, P=.02) seconds, respectively, on the TUG, and by 22.6 (95% CI, -2.31 to 47.50, P=.09), 38.92 (95% CI, 12.53 to 65.30, P<.01), 47.53 (95% CI, 17.93 to 77.13, P<.01) meters, respectively, on the 2-minute walk test. Income level explained 14% and 11% of the variance in perceived mobility and social health measures, respectively. ConclusionsStudy results suggest that sociodemographic factors of race-ethnicity, gender, and income level are associated with functioning and social health post-lower limb amputation. The clinical effect of this new knowledge lies in what it offers to health care practitioners who treat this patient population, in recognizing potential barriers to optimal recovery and quality of life. More work is required to assess lived experiences after amputation and provide better understanding of amputation-related health disparities.

Mobile measurements for distribution and attribution of particulate matter in urban environments

Particulate matter (PM) sources differ in urban environments and may show spatiotemporal distinct patterns for varying particle aerodynamic diameters (DP). We here assess such patterns using high-resolution PM ≤10 μm data recorded with a cargo bike along a 14 km route through urban, suburban, and rural areas in Mainz (Germany). The measurements conducted twice a day between May and August 2021 reveal decreasing particle number concentration (PNC) with increasing DP including ∼6000 times higher particle numbers at DP 0.22–0.25 μm compared to DP 4–5 μm. Total mass concentration is bi-modally distributed and dominated by particles <0.3 μm and from 3 to 5 μm representing 36 and 22% of the entire air load, respectively. PM concentrations in Mainz are significantly higher in the morning than in the afternoon, and PM1 and PM10 are 13 and 31% higher in urban compared to surrounding suburban and rural areas. The high-resolution measurements also revealed 30% higher PM concentrations at DP 3–5 μm in the urban compared to the rural sectors, which is indicative for road dust, brake and tyre abrasion as the main source. DP distribution in rural hotspots is generally shifted toward larger particles >3 μm, most likely related to natural dust from agricultural fields. These findings show that high-resolution PM profiles can skillfully be recorded using bikes as mobile platform to identify spatial pollution patterns and attribute DP spectra to particular emission sources.

Spatiotemporal Distribution Characteristics and Multi-Factor Analysis of Near-Surface PM2.5 Concentration in Local-Scale Urban Areas

Near-surface PM2.5 concentrations have been greatly exacerbated by urban land expansion and dense urban traffic. This study aims to clarify the effects of multiple factors on near-surface PM2.5 concentrations from three perspectives of background climatic variables, urban morphology variables, and traffic-related emission intensity. First, two case areas covering multiple local blocks were selected to conduct mobile measurements under different climatic conditions. The observed meteorological parameters and PM2.5 concentration were obtained through GIS-based imaging. These interpolation results of air temperature and relative humidity reveal highly spatiotemporal diversity, which is greatly influenced by artificial heat emissions and spatial morphology characteristics in local areas. The PM2.5 concentration on measurement days also varies considerably from the lowest value of 44~56 μg/m3 in October to about 500 μg/m3 in December in Harbin winter and ranges between about 5 μg/m3 and 50 μg/m3 in Guangzhou summer. The correlation analysis reveals that both the climatic conditions and urban morphology characteristics are significantly correlated with local PM2.5 concentration. Especially for Guangzhou summer, the PM2.5 concentration was positively correlated with the street traffic emission source intensity with correlation coefficient reaching about 0.79. Multivariate nonlinear formulas were applied to fit the association between these factors and PM2.5 concentration with higher determined coefficients. And optimization strategies are thus suggested to improve the urban air quality in local-scale areas. This attribution analysis contributes to environmentally friendly urban construction.

Digital mobility measures to predict Parkinson's disease

Digital mobility measures to predict Parkinson's disease

Validity and Responsiveness of the Portable Warrior Test of Tactical Agility After Rehabilitation in Service Members With Mild Traumatic Brain Injury.

The Portable Warrior Test of Tactical Agility (POWAR-TOTAL) is a performance-based test designed to assess active-duty service members diagnosed with mild traumatic brain injuries (mTBIs) and could potentially inform return to duty decisions. To examine the validity and responsiveness of the POWAR-TOTAL measure, this study collected self-reported and performance measures by active-duty service members before and after an episode of physical therapist care. Seventy-four individuals, enrolled in care for mTBI symptoms at 1 of 2 concussion specialty Intrepid Spirit Centers, were examined the week that they initiated physical therapy with the intention to return to active duty. Self-reported measures of concussion symptoms, pain, posttraumatic stress, headache, dizziness, and sleep quality were used, as were concurrent measures of mobility and balance. The POWAR-TOTAL task (motor and cognitive skills in single and dual-task conditions) was administered. Forty-nine active-duty service members returned for posttherapy testing using the same test battery. Effect sizes for change in measures were calculated. Construct validity was assessed by correlating change scores on POWAR with concurrent self-report and mobility measures. Responsiveness was evaluated using an anchor-based approach. Significant improvements in self-reported and performance-based measures, including POWAR, were observed after therapy with moderate to large effect sizes. Improvement in POWAR performance correlated with improvement in both performance and self-reported measures. After therapy, individuals who registered improvement on the Patient Global Impression of Change scale demonstrated significantly faster POWAR motor performance than those who rated little or no improvement in their condition. The POWAR-TOTAL captured improvement on a military-specific task after completing physical therapy for mTBI and could serve as an indicator of physical recovery and readiness for return to duty. Challenging cognitive and motor measures for service members may aid in the assessment of recovery and the ability to successfully return to duty after concussion as part of a comprehensive examination approach.

Sustainable mobility in smart cities: a document study of mobility initiatives of mid-sized Nordic smart cities

The smart city concept is being viewed as part of the urban future, integrating technological advances, multi-sectorial collaboration, and innovative open markets with strategic goals and ambitions to achieve sustainable urban development. Smart mobility is considered a vital element of the smart city, given that urban transport systems should become more efficient and sustainable. With this in mind, we raise the question: how sustainable is smart mobility? To answer this, we review smart city strategies and measures of fourteen mid-sized cities of the Nordic Smart Cities Network, identifying smart mobility goals together with proposed or implemented mobility measures. We evaluate how they align with sustainable mobility and how effective they are with the help of two analytical frameworks: a) the EU’s Sustainable Urban Mobility Planning (SUMP) objectives and b) the S.M.A.R.T. objectives. In doing so, we assess to which degree smart mobility strategies and measures in Nordic smart cities contribute to sustainable urban mobility and development, and how they contribute to achieving sustainable and smart city goals in terms of feasibility and accountability. The study reveals that measures mainly address the SUMP objectives relating to efficiency and environment, with little focus on inclusive and safe mobility planning that caters to attractive cities and high quality of urban life. Another finding is that smart mobility measures are relatively conventional, and their goals and ambitions are often stated on an abstract level and rarely measurable with specific indicators. Thus, there seems to be a lack of feasibility and accountability related to smart mobility measures, as well as a lack of focus on social sustainability.