15 Works

OpenSense: Validation of IMU-based estimates of kinematics over long durations

Johanna O'Day, Scott Delp, Mazen Al Borno, Vanessa Ibarra, James Dunne, Ajay Seth, Ayman Habib, Carmichael Ong, Jennifer Hicks & Scott Uhlrich
Here we provide the dataset for validation of OpenSense, an open-source toolbox for Inertial-Measurement-Unit-based measurement of lower extremity kinematics over long durations (10 minutes). We computed IMU-based estimates of kinematics using sensor fusion and an inverse kinematics approach with a constrained biomechanical model. We measured kinematics for 11 subjects as they performed two 10-minute trials: (1) walking and turning, and (2) a repeated sequence of varied lower-extremity movements (sitting, standing, stair-climbing, side-stepping, walking, running). Subjects...

Dataset for finger motion and contact by a second finger influence the tactile perception of electrovibration

Yasemin Vardar & Katherine J. Kuchenbecker
Electrovibration holds great potential for creating vivid and realistic haptic sensations on touchscreens. Ideally, a designer should be able to control what users feel independent of the number of fingers they use, the movements they make, and how hard they press. We sought to understand the perception and physics of such interactions by determining the smallest 125 Hz electrovibration voltage that fifteen participants could reliably feel when performing four different touch interactions at two normal...

Cellular dialogues that enable self-organization of dynamic spatial patterns

Yiteng Dang, Douwe A.J. Grundel & Hyun Youk
Cells form spatial patterns by coordinating their gene expressions. How a group of mesoscopic numbers (hundreds-to-thousands) of cells, without pre-defined morphogens and spatial organization, self-organizes spatial patterns remains incompletely understood. Of particular importance are dynamic spatial patterns - such as spiral waves that perpetually move and transmit information over macroscopic length-scales. We developed an open-source, expandable software that can simulate a field of cells communicating with any number of cell-secreted molecules in any manner. With...

Data from: Airway segmentation and centerline extraction from thoracic CT – comparison of a new method to state of the art commercialized methods

Pall Jens Reynisson, Marta Scali, Erik Smistad, Erlend Fagertun Hofstad, Håkon Olav Leira, Frank Lindseth, Toril Anita Nagelhus Hernes, Tore Amundsen, Hanne Sorger & Thomas Langø
Introduction: Our motivation is increased bronchoscopic diagnostic yield and optimized preparation, for navigated bronchoscopy. In navigated bronchoscopy, virtual 3D airway visualization is often used to guide a bronchoscopic tool to peripheral lesions, synchronized with the real time video bronchoscopy. Visualization during navigated bronchoscopy, the segmentation time and methods, differs. Time consumption and logistics are two essential aspects that need to be optimized when integrating such technologies in the interventional room. We compared three different approaches...

Data from: Aeroecology meets aviation safety: early warning systems in Europe and the Middle East prevent collisions between birds and aircraft

Hans Van Gasteren, Karen L. Krijgsveld, Nadine Klauke, Yossi Leshem, Isabel C. Metz, Michal Skakuj, Serge Sorbi, Inbal Schekler & Judy Shamoun-Baranes
The aerosphere is utilized by billions of birds, moving for different reasons and from short to great distances spanning tens of thousands of kilometres. The aerosphere, however, is also utilized by aviation which leads to increasing conflicts in and around airfields as well as en-route. Collisions between birds and aircraft cost billions of euros annually and, in some cases, result in the loss of human lives. Simultaneously, aviation has diverse negative impacts on wildlife. During...

Data from: Charting the complete elastic properties of inorganic crystalline compounds

Maarten De Jong, Wei Chen, Thomas Angsten, Anubhav Jain, Randy Notestine, Anthony Gamst, Marcel Sluiter, Chaitanya Krishna Ande, Sybrand Van Der Zwaag, Jose J. Plata, Cormac Toher, Stefano Curtarolo, Gerbrand Ceder, Kristin A. Persson & Mark Asta
The elastic constant tensor of an inorganic compound provides a complete description of the response of the material to external stresses in the elastic limit. It thus provides fundamental insight into the nature of the bonding in the material, and it is known to correlate with many mechanical properties. Despite the importance of the elastic constant tensor, it has been measured for a very small fraction of all known inorganic compounds, a situation that limits...

Data from: Alongshore variation in barnacle populations is determined by surfzone hydrodynamics

Alan L. Shanks, Steven G. Morgan, Jamie MacMahan, Ad J.H.M. Reniers & Ad J. H. M. Reniers
Larvae in the coastal ocean are transported toward shore by a variety of mechanisms. Crossing the surf zone is the last step in a shoreward migration and surf zones may act as semipermeable barriers altering delivery of larvae to the shore. We related variation in the structure of intertidal barnacle populations to surfzone width (surfzone hydrodynamics proxy), wave height, alongshore wind stress (upwelling proxy), solar radiation, and latitude at 40 rocky intertidal sites from San...

Data from: High throughput techniques to reveal the molecular physiology and evolution of digestion in spiders

Felipe J. Fuzita, Martijn W.H. Pinkse, José S.L. Patané, Peter D.E.M. Verhaert & Adriana R. Lopes
Background: Spiders are known for their predatory efficiency and for their high capacity of digesting relatively large prey. They do this by combining both extracorporeal and intracellular digestion. Whereas many high throughput (“-omics”) techniques focus on biomolecules in spider venom, so far this approach has not yet been applied to investigate the protein composition of spider midgut diverticula (MD) and digestive fluid (DF). Results: We here report on our investigations of both MD and DF...

Data from: Rapid multiple-level coevolution in experimental populations of yeast killer and non-killer strains

Magdalena Pieczynska, Dominika Wloch-Salamon, Ryszard Korona, J. Arjan G.M. De Visser, Magdalena D. Pieczynska & J. Arjan G. M. De Visser
Coevolution between different biological entities is considered an important evolutionary mechanism at all levels of biological organization. Here we provide evidence for coevolution of a yeast killer strain (K) carrying cytoplasmic dsRNA viruses coding for anti-competitor toxins and an isogenic toxin-sensitive strain (S) during 500 generations of laboratory propagation. Signatures of coevolution developed at two levels. One of them was coadaptation of K and S. Killing ability of K first increased quickly and was followed...

Data from: Integrated analysis and visualization of group differences in structural and functional brain connectivity: applications in typical ageing and schizophrenia

Carolyn D. Langen, Tonya J. White, M. Arfan Ikram, Meike W. Vernooij & Wiro J. Niessen
Structural and functional brain connectivity are increasingly used to identify and analyze group differences in studies of brain disease. This study presents methods to analyze uni- and bi-modal brain connectivity and evaluate their ability to identify differences. Novel visualizations of significantly different connections comparing multiple metrics are presented. On the global level, “bi-modal comparison plots” show the distribution of uni- and bi-modal group differences and the relationship between structure and function. Differences between brain lobes...

Data from: From welcome culture to welcome limits? Uncovering preference changes over time for sheltering refugees in Germany

Ulf Liebe, Jürgen Meyerhoff, Maarten Kroesen, Caspar Chorus & Klaus Glenk
Europe recently experienced a large influx of refugees, spurring much public debate about the admission and integration of refugees and migrants into society. Previous research based on cross-sectional data found that European citizens generally favour asylum seekers with high employability, severe vulnerabilities, and Christians over Muslims. These preferences and attitudes were found to be homogeneous across countries and socio-demographic groups. Here, we do not study the general acceptance of asylum seekers, but the acceptance of...

Middle Eocene terrestrial paleoweathering and climate evolution in the midlatitude Bohai Bay Basin of Eastern China

Di Chen, Xiongqi Pang, Kun Zhang, Guoyong Liu, Fujie Jiang, Liang Li, Youwei Wang, Min Li & Yang Liu
The middle Eocene is a key time period for understanding Cenozoic cooling of the global climate. In eastern Asia, this time period was marked by deposition of extensive mudstones, shales and interbedded siltstones, especially in the midlatitude Bohai Bay Basin. Still, midlatitude terrestrial records of climate evolution during the middle Eocene are rare. Here, we analyze a continuous, high-resolution record of this period using samples of the shales in the fourth submember of the third...

Data from: Numerical simulations of targeted delivery of magnetic drug aerosols in the human upper and central respiratory system: a validation study

Sasa Kenjeres & Jimmy L. Tjin
In the present study, we investigate the concept of the targeted delivery of pharmaceutical drug aerosols in an anatomically realistic geometry of the human upper and central respiratory system. The geometry considered extends from the mouth inlet to the 8th generation of the bronchial bifurcations and is identical to the phantom model used in the experimental studies of [Banko {em et al.} (2015), Exp. Fluids, {bf 56} (117):1-12]. In our computer simulations, we combine the...

Data from: Workshop on reconstruction schemes for magnetic resonance data: summary of findings and recommendations

Esin Ozturk-Isik, Ian Marshall, Patryk Filipiak, Arnold J.V. Benjamin, Valia Guerra Ones, Rafael Ortiz Ramón, Maria Del C. Valdés Hernández & Arnold J. V. Benjamin
The high-fidelity reconstruction of compressed and low-resolution magnetic resonance (MR) data is essential for simultaneously improving patient care, accuracy in diagnosis and quality in clinical research. Sponsored by the Royal Society through the Newton Mobility Grant Scheme, we held a half-day workshop on reconstruction schemes for MR data on 17 August 2016 to discuss new ideas from related research fields that could be useful to overcome the shortcomings of the conventional reconstruction methods that have...

Data from: Seagrass coastal protection services reduced by invasive species expansion and megaherbivore grazing

Rebecca K. James, Marjolijn J. A. Christianen, Marieke Van Katwijk, Jaco De Smit, , Peter Herman & Tjeerd Bouma
1. Seagrasses provide an important ecosystem service by creating a stable erosion-resistant seabed that contributes to effective coastal protection. Variable morphologies and life history strategies, however, are likely to impact the sediment stabilisation capacity of different seagrass species. We question how opportunistic invasive species and increasing grazing by megaherbivores may alter sediment stabilisation services provided by established seagrass meadows, using the Caribbean as a case study. 2. Utilising two portable field-flumes that simulate unidirectional and...

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