High-definition point-of-view intraoperative recording using a smartphone: A hands-free approach

2018 ◽  
Vol 129 (3) ◽  
pp. 578-581 ◽  
Author(s):  
Amir A. Hakimi ◽  
Allison C. Hu ◽  
Tiffany T. Pham ◽  
Brian J. F. Wong
Keyword(s):  
Point Of View ◽  
High Definition ◽  
Intraoperative Recording

A new experimental set-up to study the shear strength of snow-mortar interfaces

2021 ◽  
Author(s):  
Gianmarco Vallero ◽  
Monica Barbero ◽  
Fabrizio Barpi ◽  
Mauro Borri-Brunetto ◽  
Valerio De Biagi
Keyword(s):  
Shear Strength ◽  
Progressive Failure ◽  
Failure Process ◽  
Construction Materials ◽  
Water Film ◽  
Video Camera ◽  
Point Of View ◽  
High Definition ◽  
Snow Layer ◽  
Particle Image Velocimetry Technique

<p>The progressive failure of a snow layer deposited on a stiff substrate is at the base of the comprehension of several physical processes that can be found both in natural and artificial conditions. For instance, glide avalanches often originate from the reduction of the basal friction between the snowpack and the underlying ground due to the presence of liquid water film or depth hoar at the snow-ground interface. Moreover, the interaction between snow and construction materials relates to many other applications such as the study of new and more efficient snow removal techniques, the safety of travelers along snow covered roads, the snow redistribution from roofs and buildings, etc. </p><p>Despite this large number of application fields, laboratory investigations are still limited. We performed cold room tests on artificially made snow-mortar interface specimens through a direct shear test device. The effects of confinement pressure, temperature and dry snow hardness (due to sintering times) were taken into account. The tests were carried out in displacement-controlled conditions in order to study the entire failure process at the interface and the following irreversible sliding. The results show some interesting and encouraging aspects for understanding the shear strength of the interface. From a micromechanical point of view we recorded the tests with a high-definition video camera and analyzed the data with the Particle Image Velocimetry technique to obtain the motion fields on the external side of the specimens. Here, we present and discuss some preliminary results of the experimental activity and suggest some future implementations and further developments of the studied topic.       </p>

scholarly journals Surgeon point-of-view recording: Using a high-definition head-mounted video camera in the operating room

2015 ◽  
Vol 63 (10) ◽  
pp. 771 ◽  
Author(s):  
AkshayGopinathan Nair ◽  
Saurabh Kamal ◽  
TarjaniVivek Dave ◽  
Kapil Mishra ◽  
HarshaS Reddy ◽  
...  
Keyword(s):  
Operating Room ◽  
Video Camera ◽  
Point Of View ◽  
High Definition

Facade inspections with drones–theoretical analysis and exploratory tests

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jorge Furtado Falorca ◽  
João Carlos Gonçalves Lanzinha
Keyword(s):  
Civil Engineering ◽  
Early Stage ◽  
Field Tests ◽  
Building Envelope ◽  
Point Of View ◽  
Qualitative Assessment ◽  
High Definition ◽  
Promising Alternative ◽  
Content Type ◽  
Technical Inspection

PurposeThis paper presents a reflection on the effectiveness of using drones in the technical inspection of building facades, as a practical alternative to more expensive and heavier conventional means. In order to verify this assumption qualitatively, a number of field tests are presented and discussed.Design/methodology/approachThe first stage consisted of a literature review. The analysis initially investigated drone technology. Then, an insight into some general applications in Civil Engineering was compiled, focusing in particular on the Construction Industry (CI), as well as the scope of building envelope inspections. In the second stage, field tests with drones were performed and the resulting data was appraised in order to get facade pathologies diagnosis as accurate as possible.FindingsThrough this study, the adaptability and versatility of using drones were checked. Thus, it has been confirmed that drone technology is an effective and promising alternative methodology to support technical inspection and diagnosis of building envelope pathologies. In fact, drones seem to be a worthwhile tool for supporting certain Civil Engineering activities–particularly when displaying a multirotor configuration, loading high-definition (HD) cameras, for both stills photography and video.Research limitations/implicationsAs the main goal of this approach was simply a qualitative assessment of evidence on the advantages of using drones compared with conventional means, other kinds of comparative analysis were not discussed in depth. However, this and other potential restrictive issues may represent an opportunity to push more developments. A deeper knowledge of data handling and clear procedures for the use of drones could be very valuable for the CI and for building envelope inspections.Practical implicationsIn investigating this subject, this research can offer valuable input to enable a greater awareness of the use of drones in the technical inspection of buildings, particularly in hard-to-reach locations, to the detriment of conventional means. In these circumstances, this methodology can bring great benefits, particularly from an environmental impact point of view, since the resources used are much lower. In addition, a very reliable diagnosis can be achieved more quickly, and at a much lower cost.Originality/valueThe introduction of a standard for drone inspection practice is still at an early stage, with initial steps being taken in an apparently well-focused effort to achieve consolidation. Research studies of this kind may have an important role to play in drawing the stakeholders' attention to the benefits of using this technique, particularly for those working in the building usage phase.

scholarly journals KINEMATIC DIFFERENCES BETWEEN PROFICIENT AND NON-PROFICIENT FREE THROW SHOOTERS – VIDEO ANALYSIS

2021 ◽  
Vol 1 (2021) ◽  
pp. 12-21
Author(s):  
Dimitrije Cabarkapa ◽  
◽  
Andrew C. Fry ◽  
John P. Poggio ◽  
Michael A. Deane ◽  
...  
Keyword(s):  
Video Analysis ◽  
Point Of View ◽  
High Definition ◽  
Projection Model ◽  
Free Throw ◽  
Margin Of Error ◽  
Preparatory Phase ◽  
Release Height ◽  
Hip Flexion ◽  
Shoulder Angle

Despite its importance and significant contribution to the final game outcome, the free throw shooting motion is greatly understudied. The purpose of this study was to examine kinematic differences between proficient and non-proficient free throw shooters and to determine which variables have the greatest impact on successful free throw shooting performance. Thirteen healthy recreationally active males volunteered to participate in this study. Each participant shot three sets of ten consecutive free throws from the regulation distance from the basket. Each set was performed under 3 minutes with 1-2-minute rest between each set. A high-definition camera recording at 30 fps captured the free throw shooting motion from a sagittal point of view. Video analysis software was used to analyze the following kinematic variables: knee angle, elbow angle, hip flexion, ankle flexion, release angle, shoulder angle, hand release height, and elbow height. The findings of this study suggest that lower elbow positioning influenced by greater knee, ankle, and hip flexion during the preparatory phase of the shooting motion may lead to improvements in free throw shooting accuracy. Moreover, greater ball release height and release angle, as previously suggested, could decrease the margin of error and enhance free throw shooting performance. By using these kinematic variables to create the discriminant function projection model, it is plausible that proficient free throw shooters can be accurately classified in 94% of cases.

Standardization as Governance Without Government

2012 ◽  
Vol 10 (2) ◽  
pp. 14-28
Author(s):  
Niclas Meyer
Keyword(s):  
Point Of View ◽  
Private Governance ◽  
High Definition ◽  
Private Industry ◽  
Governance Capacity ◽  
Digital Video Broadcasting ◽  
Video Broadcasting ◽  
High Definition Television ◽  
Successful Case ◽  
The Government

Industry-led technical standardization is often cited as an example for governance without government and the Digital Video Broadcasting (DVB) Project is often presented as a particularly successful case of such private governance. Succeeding the spectacular failure of the government-led high-definition television standardization project in European, the successes of the industry-led DVB Project have often been cited as evidence for the superior governance capacity of private industry. While the commercial and engineering success of the DVB Project is unequivocal, this paper raises the question whether it has been equally successful from a governance point of view.

The Geosciences Applied to Lunar Exploration

1962 ◽  
Vol 14 ◽  
pp. 169-257 ◽  
Author(s):  
J. Green
Keyword(s):  
Lunar Surface ◽  
Probable Mechanism ◽  
Point Of View ◽  
Lunar Exploration ◽  
Geological Model ◽  
Apply Geophysics ◽  
Surface Features ◽  
The Impact

The term geo-sciences has been used here to include the disciplines geology, geophysics and geochemistry. However, in order to apply geophysics and geochemistry effectively one must begin with a geological model. Therefore, the science of geology should be used as the basis for lunar exploration. From an astronomical point of view, a lunar terrain heavily impacted with meteors appears the more reasonable; although from a geological standpoint, volcanism seems the more probable mechanism. A surface liberally marked with volcanic features has been advocated by such geologists as Bülow, Dana, Suess, von Wolff, Shaler, Spurr, and Kuno. In this paper, both the impact and volcanic hypotheses are considered in the application of the geo-sciences to manned lunar exploration. However, more emphasis is placed on the volcanic, or more correctly the defluidization, hypothesis to account for lunar surface features.

How a sheperd guides a sheep herd?

1984 ◽  
Vol 75 ◽  
pp. 331-337
Author(s):  
Richard Greenberg
Keyword(s):  
Point Of View ◽  
Single Ring ◽  
Damping Effects ◽  
Ring Particle

ABSTRACTThe mechanism by which a shepherd satellite exerts a confining torque on a ring is considered from the point of view of a single ring particle. It is still not clear how one might most meaningfully include damping effects and other collisional processes into this type of approach to the problem.

The growth of mica polytypes as studied by conventional and high-resolution TEM

1983 ◽  
Vol 41 ◽  
pp. 174-177
Author(s):  
A. Baronnet ◽  
M. Amouric
Keyword(s):  
Water Pressure ◽  
Point Of View ◽  
Temperature Fields ◽  
Natural Occurrence ◽  
Growth Mechanisms ◽  
Long Period ◽  
High Resolution Tem ◽  
Layer Stacking ◽  
Experimental Works ◽  
Potential Use

The origin of mica polytypes has long been a challenging problem for crystal- lographers, mineralogists and petrologists. From the petrological point of view, interest in this field arose from the potential use of layer stacking data to furnish further informations about equilibrium and/or kinetic conditions prevailing during the crystallization of the widespread mica-bearing rocks. From the compilation of previous experimental works dealing with the occurrence domains of the various mica "polymorphs" (1Mr, 1M, 2M1, 2M2 and 3T) within water-pressure vs temperature fields, it became clear that most of these modifications should be considered as metastable for a fixed mica species. Furthermore, the natural occurrence of long-period (or complex) polytypes could not be accounted for by phase considerations. This highlighted the need of a more detailed kinetic approach of the problem and, in particular, of the role growth mechanisms of basal faces could play in this crystallographic phenomenon.

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