scholarly journals Preliminary evaluation of repeatability for a mobile road weather information sensor

2018 ◽  
Vol 19 (6) ◽  
pp. 368-374
Author(s):  
Krzysztof Brzozowski ◽  
Andrzej Maczynski ◽  
Artur Ryguła
Keyword(s):  
Preliminary Evaluation ◽  
Vehicle Speed ◽  
Traffic Intensity ◽  
Winter Maintenance ◽  
Weather Information ◽  
Lighting Conditions ◽  
Current State

The article presents the results of road tests related to repeatability evaluation of the mobile road weather sensor readings. This kind of sensors is increasingly used by road administrators to assess current state of roads. They can be also used to identify road sections where local changes in friction occur most often. The carried out tests concern the repeatability of readings for different lighting conditions (day and night) and vehicle speed. The research was performed using the Lufft MARWIS sensor on roads with different traffic intensity and different standards of winter maintenance.

Evaluation of Effects of Weather Information on Winter Maintenance Costs

2009 ◽  
Vol 2107 (1) ◽  
pp. 104-110 ◽  
Author(s):  
Zhirui Ye ◽  
Xianming Shi ◽  
Christopher K. Strong ◽  
Tina H. Greenfield
Keyword(s):  
Maintenance Costs ◽  
Winter Maintenance ◽  
Weather Information

Towards addressing the current state of confusion within the Hexabothriidae Price, 1942 (1908): Callorhynchocotyle Suriano & Incorvaia, 1982 (Monogenea: Hexabothriidae) re-visited, with the preliminary evaluation of novel parameters for measuring haptoral armature of hexabothriids

Zootaxa ◽  
2012 ◽  
Vol 3229 (1) ◽  
pp. 1 ◽  
Author(s):  
DAVID VAUGHAN ◽  
KEVIN CHRISTISON
Keyword(s):  
Multivariate Analyses ◽  
Preliminary Evaluation ◽  
Insufficient Data ◽  
Diagnostic Significance ◽  
Significant Treatment ◽  
Current State ◽  
Measurement Protocol ◽  
The Family ◽  
Variable Character ◽  
First Time

The monogenean family, Hexabothriidae Price, 1942 (1908), currently consists of 15 valid genera parasitic on the gills ofchondrichthyan fishes. The hexabothriid literature is littered with inconsistencies, ambiguity and editorial errors whichhampers the progress and the development of investigations after the significant treatment of the family by Boeger &Kritsky (1989). A lack of consistency in the measurement protocol for the haptoral armature of hexabothriids is highlight-ed and discussed. The preliminary results of a new measurement protocol incorporating existing and novel parameterswere explored for the first time using statistical analyses. Character variables were investigated for their utility as poten-tially useful discriminators using univariate and multivariate analyses. The elimination of age-associated variance in suck-er sclerites was performed by ratio-transformation of the data to an age-dependant variable. Character variables with ahigh coefficient of variance after accounting for age were disqualified for use in the subsequent analyses. A coefficient ofvariance exceeding a conservative 10% limit was considered the result of measurement error resulting from the small sizesof these variables and therefore may also reflect the limitations of hardware and software in making small but accuratemeasurements. The proposed protocol is tested on representatives of Callorhynchocotyle and a Rajonchocotyle species totest the utility of character variables in separating species. Principle Component Analysis of the combination of the sucker-sclerites and the hamulus provided a preliminary level of robustness in separating Callorhynchocotyle species with theexception of Callorhynchocotyle hydrolagi for which there were insufficient data. Results confirm the importance of thehamulus in providing valuable diagnostic significance but the shape of the sucker sclerites as a function of total length anddiameter may also provide significant potential. Callorhynchocotyle is revisited with the addition of new specimens for 3of the species. The new data resulting from the measurement protocol are included in the redescription of Callorhynchoc-otyle marplatensis, Callorhynchocotyle callorhynchi and Callorhynchocotyle amatoi. Supplemental information is provided for C. hydrolagi and Callorhynchocotyle sagamiensis.

scholarly journals Augmented Reality Systems for Improved Operating Room Workflow

Neurosurgery ◽  
2019 ◽  
Vol 66 (Supplement_1) ◽  
Author(s):  
Nhu Q Nguyen ◽  
Jillian Cardinell ◽  
Joel Ramjist ◽  
Yuta Dobashi ◽  
Dimitrios Androutsos ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Augmented Reality ◽  
Operating Room ◽  
Hard Tissue ◽  
Lighting Conditions ◽  
Current State ◽  
Eye Fatigue ◽  
Recovery Times ◽  
Surgical Difficulty ◽  
Microsoft Hololens

Abstract INTRODUCTION Minimally invasive surgery (MIS) is considered superior to open surgery because of the reduced recovery times, pain medication, and infection rates. However, the smaller surgical site increases the surgical difficulty as physical landmarks are no longer visible. Using an augmented reality (AR) overlay where a patient's CT or MRI information is registered to the physical patient, users would be able to view the internal patient anatomy while maintaining a small surgical site. Our goal is to determine how to best render the virtual information intuitively for surgeons while operating MIS cases. METHODS Given AR systems available today, there are many options regarding rendering virtual objects. Using the Microsoft HoloLens, we virtually overlay two layers of the patient body (soft and hard tissue) and vary the opacity and color in real time. Surgeons wore the headset during nonoperative stages of the surgery and asked usability questions regarding the system. RESULTS Users surveyed displayed strong predilection towards more opaque renderings of hard tissue, with an average setting of approximately 95%. Comparatively, users preferred much lower opacity for soft tissue, with an average opacity of 26.88%, and with some users wanting no visualization of soft tissue. It was also found that users at earlier stages in their training (ie, medical students and residents) preferred more contrasting colors, whereas attendings and fellows preferred grey-scaled color profiles analogous to traditional imaging modalities. CONCLUSION Based on the results found in the usability testing, it was found that current state-of-the-art AR headsets are not currently well suited for the operating room. Ergonomics, eye fatigue, and changing lighting conditions were all undesirable factors, especially for extended use during surgery. Data gathered from the rendering tests and pain points will be further addressed in the next generation of AR headsets.

Design and Preliminary Evaluation of a Novel Brace for Boutonniere Deformity

2010 ◽  
Vol 4 (2) ◽  
Author(s):  
Mark E. Rentschler ◽  
Scott A. Macdonald
Keyword(s):  
Surgical Repair ◽  
State Of The Art ◽  
Middle Finger ◽  
Extensor Mechanism ◽  
Patient Comfort ◽  
Preliminary Evaluation ◽  
Test Results ◽  
New Device ◽  
Current State

Boutonniere deformities are a common injury to the extensor mechanism of the finger. The deformity results in fixed contraction in the middle finger joint and is severely debilitating to functionality. Due to the complexity of the extensor mechanism, surgical repair is difficult, which usually requires multiple procedures, and in some cases is unsuccessful. Nonsurgical treatment of the deformity has not dramatically improved in many years and usually requires long-term use of braces and physical therapy. This work is focused on design and preliminary evaluation of an improved boutonniere brace to correct the deformity with emphasis on lower costs, integrating therapeutic techniques such as heat and motion to increase blood flow and patient comfort. A review of the current state of the art is presented along with the design approach used to develop an improved device. Experimental test results are also presented. This work demonstrates a new device and approach for treatment of boutonniere deformities that may translate to treatment of other conditions such as arthritis.

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