Objective: This exploratory study investigated to what extent gait characteristics and clinical physical therapy assessments predict falls in chronic stroke survivors. Design: Prospective study. Subjects: Chronic fall-prone and non-fall-prone stroke survivors. Methods: Steady-state gait characteristics were collected from 40 participants while walking on a treadmill with motion capture of spatio-temporal, variability, and stability measures. An accelerometer was used to collect daily-life gait characteristics during 7 days. Six physical and psychological assessments were administered. Fall events were determined using a “fall calendar” and monthly phone calls over a 6-month period. After data reduction through principal component analysis, the predictive capacity of each method was determined by logistic regression. Results: Thirty-eight percent of the participants were classified as fallers. Laboratory-based and daily-life gait characteristics predicted falls acceptably well, with an area under the curve of, 0.73 and 0.72, respectively, while fall predictions from clinical assessments were limited (0.64). Conclusion: Independent of the type of gait assessment, qualitative gait characteristics are better fall predictors than clinical assessments. Clinicians should therefore consider gait analyses as an alternative for identifying fall-prone stroke survivors.
Introduction: Falling causes long term disability and can even lead to death. Most falls occur during gait. Therefore improving gait stability might be beneficial for people at risk of falling. Recently arm swing has been shown to influence gait stability. However at present it remains unknown which mode of arm swing creates the most stable gait. Aim: To examine how different modes of arm swing affect gait stability. Method: Ten healthy young male subjects volunteered for this study. All subjects walked with four different arm swing instructions at seven different gait speeds. The Xsens motion capture suit was used to capture gait kinematics. Basic gait parameters, variability and stability measures were calculated. Results: We found an increased stability in the medio-lateral direction with excessive arm swing in comparison to normal arm swing at all gait speeds. Moreover, excessive arm swing increased stability in the anterior–posterior and vertical direction at low gait speeds. Ipsilateral and inphase arm swing did not differ compared to a normal arm swing. Discussion: Excessive arm swing is a promising gait manipulation to improve local dynamic stability. For excessive arm swing in the ML direction there appears to be converging evidence. The effect of excessive arm swing on more clinically relevant groups like the more fall prone elderly or stroke survivors is worth further investigating. Conclusion: Excessive arm swing significantly increases local dynamic stability of human gait.
Background: The Turkish translation of the Dutch Talking Touch Screen Questionnaire (TTSQ) has been developed to help physical therapy patients with a Turkish background in the Netherlands to autonomously elucidate their health problems and impairments and set treatment goals, regardless of their level of health literacy. Objective: The aim of this study was to evaluate the usability of the Turkish TTSQ for physical therapy patients with a Turkish background with diverse levels of health literacy and experience in using mobile technology. Methods: The qualitative Three-Step Test-Interview method was carried out to gain insight into the usability of the Turkish TTSQ. A total of 10 physical therapy patients participated. The interview data were analyzed using a thematic content analysis approach aimed at determining the accuracy and completeness with which participants completed the questionnaire (effectiveness), the time it took participants to complete the questionnaire (efficiency), and the extent to which the participants were satisfied with the ease of use of the questionnaire (satisfaction). The problems encountered by the participants in this study were given a severity rating, which was used to provide a rough estimate of the need for additional usability improvements. Results: No participant in this study was able to complete the questionnaire without encountering at least one usability problem. A total of 17 different kinds of problems were found. On the basis of their severity score, 3 problems that should be addressed during future development of the tool were “Not using the navigation function of the photo gallery in Question 4 causing the participant to not see all presented response items;” “Touching the text underneath a photo in Question 4 to select an activity instead of touching the photo itself, causing the activity not to be selected;” and “Pushing too hard or tapping too softly on the touch screen causing the touch screen to not respond.” The data on efficiency within this study were not valid and are, therefore, not reported in this study. No participant was completely satisfied or dissatisfied with the overall ease of use of the Turkish TTSQ. Two participants with no prior experience of using tablet computers felt that, regardless of what kinds of improvement might be made, it would just be too difficult for them to learn to work with the device. Conclusions: As with the Dutch TTSQ, the Turkish TTSQ needs improvement before it can be released. The results of this study confirm the conclusion of the Dutch TTSQ study that participants with low levels of education and little experience in using mobile technology are less able to operate the TTSQ effectively. Using a Dutch speaking interviewer and Turkish interpreter has had a negative effect on data collection in this study.
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31-12-2019Actuele vraagstukken zoals klimaatverandering, plastic soep en toekomstige schaarste van fossiele grondstoffen zijn hedendaagse onderwerpen die ook zijn invloed beginnen te hebben op consumentengedrag. Verpakkingen zijn de laatste decennia een belangrijk onderwerp in de maatschappelijke bewustwording omtrent duurzaamheid, hernieuwbare grondstoffen en circulair gebruik. Papier en kunststof zijn de meest gebruikte verpakkingsmaterialen. De MKB partners in BioKLEUR merken ook een toenemende vraag naar biobased materialen en zien kansen om nieuwe markten te creëren voor hun producten, vooral als er een mogelijkheid is de materialen 100% biobased te maken. Het probleem dat de MKB-partners belemmert om de 100 % biobased materialen te produceren is dat op de markt biobased kleurstoffen zeer beperkt beschikbaar zijn en indien beschikbaar voldoen ze niet aan de kwaliteitscriteria gesteld voor toepassingen in papier en kunststof. Daarom zijn de synthetische kleurstoffen momenteel de enige oplossing. Omdat synthetische kleuren zo stabiel zijn, zijn ze niet afbreekbaar in het milieu. De stoffen zijn ook vaak toxisch en samen met de stabiliteit ontstaat er een cumulatief effect. Dit zelfde probleem gaat ontstaan wanneer deze synthetische kleurstoffen in biologisch afbreekbaar verpakkingsmateriaal worden gebruikt en in het milieu terecht komen. Natuurlijke kleurstoffen zijn een mogelijke oplossing. Het project wordt uitgevoerd door Avans Hogeschool in samenwerking met Stenden hogeschool, NRK -Branchevereniging , Waterschap Brabanse Delta en 11 MKB partners in biobased producten, innovatie en design. Het project zal leiden tot verdieping in en gebruiksklaar maken van kennis over natuurlijke kleuren en de toepassingsmogelijkheden in papier en kunststof en sterk bijdragen aan het doel van de deelnemende MKB-partners en de behoefte van de maatschappij om tot de 100 % biobased en milieuvriendelijke producten te komen.
Every year the police are confronted with an ever increasing number of complex cases involving missing persons. About 100 people are reported missing every year in the Netherlands, of which, an unknown number become victims of crime, and presumed buried in clandestine graves. Similarly, according to NWVA, several dead animals are also often buried illegally in clandestine graves in farm lands, which may result in the spread of diseases that have significant consequences to other animals and humans in general. Forensic investigators from both the national police (NP) and NWVA are often confronted with a dilemma: speed versus carefulness and precision. However, the current forensic investigation process of identifying and localizing clandestine graves are often labor intensive, time consuming and employ classical techniques, such as walking sticks and dogs (Police), which are not effective. Therefore, there is an urgent request from the forensic investigators to develop a new method to detect and localize clandestine graves quickly, efficiently and effectively. In this project, together with practitioners, knowledge institutes, SMEs and Field labs, practical research will be carried out to devise a new forensic investigation process to identify clandestine graves using an autonomous Crime Scene Investigative (CSI) drone. The new work process will exploit the newly adopted EU-wide drone regulation that relaxes a number of previously imposed flight restrictions. Moreover, it will effectively optimize the available drone and perception technologies in order to achieve the desired functionality, performance and operational safety in detecting/localizing clandestine graves autonomously. The proposed method will be demonstrated and validated in practical operational environments. This project will also make a demonstrable contribution to the renewal of higher professional education. The police and NVWA will be equipped with operating procedures, legislative knowledge, skills and technological expertise needed to effectively and efficiently performed their forensic investigations.
Nederland moet in 2050 zowel energieneutraal als circulair zijn. Biobased en regeneratieve materialen ondersteunen deze ambities doordat zij kunnen bijdragen aan de circulaire bouwtransitie, de landbouwtransitie, de energietransitie en eveneens het verbeteren van biodiversiteit op landbouwgronden (NABB, 2023). Met regeneratief wordt “snel hergroeibaar” bedoeld, waarbij een positieve bijdrage wordt geleverd aan natuur en milieu. De National Aanpak Biobased Bouwen (2023) spreekt veelvuldig over opschaling en ketenintegratie van biobased (plaat)materialen voor binnen-toepassingen en als isolatiemateriaal, maar laat hierbij geveltoepassingen enigszins buiten beschouwing. Een belangrijke reden hiervoor is dat er nog weinig bekend is over de prestaties van biobased en regeneratieve materialen in gevels. Dit kennishiaat belemmert verdere implementatie. Gevelmaterialen worden in de exterieure omgeving beïnvloed door weerfactoren; vocht, temperatuur en straling kunnen het materiaal verouderen en zo de levensduur beïnvloeden. Momenteel is er weinig bekend over de invloed van weerfactoren op biobased gevelmaterialen, waardoor marktpartijen terughoudend zijn met implementatie. Om het toepassen van biobased materialen in gevels te stimuleren is meer inzicht nodig in veroudering en gedrag van deze materialen. Daarbij speelt ook de invloed van weerfactoren op de vorm en detaillering (verbinding?) van de gevelbekleding een rol. Bijvoorbeeld wanneer hierdoor vocht ophoopt en niet weg kan. Vormoptimalisatie kan daarnaast eveneens als ontwerpstrategie bijdragen aan de prestaties en perceptie van biobased materialen. In dit project onderzoekt de onderzoeksgroep Circulair Bouwen van de Hogeschool van Amsterdam samen met MKB-ondernemingen NPSP en WIERWAAR, Gemeente Amsterdam en Nationaal Kenniscentrum Biobased Bouw de invloed van weerfactoren op de levensduur en prestaties van biobased en deels regeneratieve gevelmaterialen, en wordt verkend hoe vormoptimalisatie daar eveneens aan kan bijdragen. Deze onderzoeken worden uitgevoerd in een experimentele omgeving, het Innovatiepaviljoen op het Marineterrein Amsterdam. Hiermee wordt inzicht verkregen in de geschiktheid voor het gebruik van deze materialen in de bouw.
