Restricted Access: Exploratory Procedures and Object Properties

1999 ◽  
Author(s):  
M. Sile O’Modhrain
Keyword(s):  
Pilot Study ◽  
Haptic Interface ◽  
Sorting Task ◽  
Restricted Access ◽  
Preliminary Results ◽  
Object Properties ◽  
Manual Exploration ◽  
The Cost ◽  
Exploratory Procedures ◽  
Interface Designs

Abstract In this paper, we present the results of a pilot study that examines whether restricting how people can explore objects haptically effects the object attributes they notice and the efficiency with which they can perform a simple sorting task. 25 observers were each randomly assigned to one of five exploration conditions: two hands (the control), one hand, thumb/forefinger, one finger, or probe. All observers performed a series of two-bin sorts. Stimuli were eight multi-propertied cubes which could be divided into two equal bins according to three properties: size, texture, and compliance. Preliminary results indicate that the restrictions on manual exploration we imposed affected both the exploratory procedures observers chose to use and the efficiency with which they could perform the task. Haptic interface designs inevitably restrict the exploratory procedures available to the user. This study attempts to determine the cost of these restrictions on the efficiency with which a user can explore multi-propertied objects in a virtual or telepresence environment.

scholarly journals Using a robotic teleoperation system for haptic exploration

2021 ◽  
Vol 8 ◽  
pp. 205566832096930
Author(s):  
Lina M Becerra Puyo ◽  
Heather M Capel ◽  
Shanon K Phelan ◽  
Sandra A Wiebe ◽  
Kim D Adams
Keyword(s):  
Haptic Feedback ◽  
Robotic System ◽  
Opportunities To Learn ◽  
Physical Impairments ◽  
Haptic Exploration ◽  
Object Properties ◽  
Manual Exploration ◽  
Adults And Children ◽  
Exploratory Procedure ◽  
Exploratory Procedures

Introduction When children with physical impairments cannot perform hand movements for haptic exploration, they miss opportunities to learn about object properties. Robotics systems with haptic feedback may better enable object exploration. Methods Twenty-four adults and ten children without physical impairments, and one adult with physical impairments, explored tools to mix substances or transport different sized objects. All participants completed the tasks with both a robotic system and manual exploration. Exploratory procedures used to determine object properties were also observed. Results Adults and children accurately identified appropriate tools for each task using manual exploration, but they were less accurate using the robotic system. The adult with physical impairment identified appropriate tools for transport in both conditions, however had difficulty identifying tools used for mixing substances. A new exploratory procedure was observed, Tapping, when using the robotic system. Conclusions Adults and children could make judgements on tool utility for tasks using both manual exploration and the robotic system, however they experienced limitations in the robotics system that require more study. The adult with disabilities required less assistance to explore tools when using the robotic system. The robotic system may be a feasible way for individuals with physical disabilities to perform haptic exploration.

Denitrification of Sewage Effluents in Deep Bed Sand Filters

1993 ◽  
Vol 27 (5-6) ◽  
pp. 381-390 ◽  
Author(s):  
John Upton
Keyword(s):  
Waste Water ◽  
Pilot Study ◽  
Water Industry ◽  
Trickling Filter ◽  
Sand Filters ◽  
The United Kingdom ◽  
The Usa ◽  
Water Plants ◽  
The Cost ◽  
Pilot Plant Study

The European waste water industry will need to develop denitrification processes to remove nitrogen as pressures increase to reduce nutrient levels discharged in effluents. In the USA deep bed filter technology has been used extensively to provide denitrification to levels less than 5 mg/l TN. This paper describes this technology and the full scale performance at some waste water plants in Florida, USA. This paper also describes a pilot study in the United Kingdom at Severn Trent Water. The results of the pilot plant study indicate that denitrification in deep bed sand filters is a sound robust technology using methanol addition. Nitrogen removals greater than the 70% required in the EC Directive 1991 are possible at winter sewage temperatures. The process is most suitable for achieving nitrogen removal at trickling filter plants. The cost of methanol addition is calculated to be ₤10/1000m3.

Su1540 Self-Expandable Biodegradable Stent in the Management of Refractory Benign Colorectal Strictures: Preliminary Results From a Pilot Study

2011 ◽  
Vol 73 (4) ◽  
pp. AB298
Author(s):  
Alessandro Repici ◽  
Giacomo Rando ◽  
Fabio Romeo ◽  
Nico Pagano ◽  
Alessandra Carlino ◽  
...  
Keyword(s):  
Pilot Study ◽  
Biodegradable Stent ◽  
Preliminary Results

scholarly journals Monitoring Migraine Cycle Dynamics with an Easy-to-Use Electrophysiological Marker—A Pilot Study

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3918 ◽  
Author(s):  
Goded Shahaf ◽  
Pora Kuperman ◽  
Yuval Bloch ◽  
Shahak Yariv ◽  
Yelena Granovsky
Keyword(s):  
Pilot Study ◽  
Stress Level ◽  
Event Related Potentials ◽  
Healthy Controls ◽  
Preliminary Results ◽  
Auditory Oddball ◽  
Control Subjects ◽  
Related Potentials ◽  
Auditory Oddball Task ◽  
The Brain

Migraine attacks can cause significant discomfort and reduced functioning for days at a time, including the pre-ictal and post-ictal periods. During the inter-ictsal period, however, migraineurs seem to function normally. It is puzzling, therefore, that event-related potentials of migraine patients often differ in the asymptomatic and inter-ictal period. Part of the electrophysiological dynamics demonstrated in the migraine cycle are attention related. In this pilot study we evaluated an easy-to-use new marker, the Brain Engagement Index (BEI), for attention monitoring during the migraine cycle. We sampled 12 migraine patients for 20 days within one calendar month. Each session consisted of subjects’ reports of stress level and migraine-related symptoms, and a 5 min EEG recording, with a 2-electrode EEG device, during an auditory oddball task. The first minute of the EEG sample was analyzed. Repetitive samples were also obtained from 10 healthy controls. The brain engagement index increased significantly during the pre-ictal (p ≈ 0.001) and the ictal (p ≈ 0.020) periods compared with the inter-ictal period. No difference was observed between the pre-ictal and ictal periods. Control subjects demonstrated intermediate Brain Engagement Index values, that is, higher than inter-ictal, yet lower than pre-ictal. Our preliminary results demonstrate the potential advantage of the use of a simple EEG system for improved prediction of migraine attacks. Further study is required to evaluate the efficacy of the Brain Engagement Index in monitoring the migraine cycle and the possible effects of interventions.

scholarly journals Economic consequences to society of pandemic H1N1 influenza 2009 – preliminary results for Sweden

2009 ◽  
Vol 14 (37) ◽  
Author(s):  
L Brouwers ◽  
B Cakici ◽  
M Camitz ◽  
A Tegnell ◽  
M Boman
Keyword(s):  
Cost Reduction ◽  
Cost Effective ◽  
H1n1 Influenza ◽  
Economic Consequences ◽  
Pandemic H1n1 ◽  
Preliminary Results ◽  
Pandemic H1n1 Influenza ◽  
Swedish Society ◽  
The Cost ◽  
Death Cases

Experiments using a microsimulation platform show that vaccination against pandemic H1N1 influenza is highly cost-effective. Swedish society may reduce the costs of pandemic by about SEK 2.5 billion (approximately EUR 250 million) if at least 60 per cent of the population is vaccinated, even if costs related to death cases are excluded. The cost reduction primarily results from reduced absenteeism. These results are preliminary and based on comprehensive assumptions about the infectiousness and morbidity of the pandemic, which are uncertain in the current situation.

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