Study on portable haptic guide device with omnidirectional driving gear

2021 ◽  
Vol 35 (5) ◽  
pp. 320-336
Author(s):  
Tetsuya Aizawa ◽  
Haruhiko Iizima ◽  
Kazuki Abe ◽  
Kenjiro Tadakuma ◽  
Riichiro Tadakuma
Keyword(s):  
Guide Device

Design of backlash-free straight-curved guide devices

2014 ◽  
Vol 228 (15) ◽  
pp. 2833-2843
Author(s):  
Long-Iong Wu ◽  
Kuan-Lwun Shu
Keyword(s):  
Common Point ◽  
Transition Curve ◽  
Circular Arc ◽  
Contact Points ◽  
Straight Line ◽  
Pitch Curve ◽  
Slider Motion ◽  
Guide Device

This article presents a method for designing a planar guide device that can guide sliders to move along a straight-curved rail and can eliminate the backlash between the slider and the rail throughout the whole range of the slider travel. The guide device has many sliders and each slider has three rollers that can separately roll on both sides of the rail. The straight-curved rail is composed of straight sections, connection sections, and circular-arc sections. For each slider, the three normal lines through the contact points between the rollers and the rail must always intersect at a common point, which is an instant center. Using this as a basis, the side profiles of the straight-curved rail can be determined. To avoid infinite jerk of the slider motion, the pitch curve of the connection section should consist of a transition curve, which is interposed between the straight line and the circular arc.

The Design of a Guide Device with Multi-Function to Aid Travel for Blind Person

2016 ◽  
Vol 10 (4) ◽  
pp. 77-86 ◽  
Author(s):  
Jiayin Song ◽  
Wenlong Song ◽  
Yupeng Cheng ◽  
Xuefu Cao
Keyword(s):  
Blind Person ◽  
Guide Device

A Novel Device for Accurate Guide wire Placement in Cannulated Screw Fixation of Femoral Neck Fracture:A Pilot Study

2020 ◽  
Author(s):  
bu-fang ren ◽  
quan-ping Ma ◽  
xin lv
Keyword(s):  
Femoral Neck ◽  
Femoral Neck Fracture ◽  
Screw Fixation ◽  
Kirschner Wire ◽  
Operation Time ◽  
Conventional Technique ◽  
Novel Device ◽  
Neck Fracture ◽  
Guide Device ◽  
Experimental Group

Abstract Background: Accurate placement of cannulated screws is the key to stable fixation of the femoral neck fracture. A novel device was developed to improve the accuracy of screw placement.Methods: 20 synthetic femoral bones were divided into conventional technique group and the experimental group. Three Kirschner wire were inserted into the femoral neck fracture by conventional technique or by the simple guide device. The operative time, total drilling times and fluoroscopic frequency were evaluated.Results: By using the guide device, the fluoroscopy and operation time of the experimental group were shorter that of the conventional method. The total drilling times with the simple guide device were significantly lower than the conventional technique group.Conclusions: This device can help trauma surgeons shorten the surgical time and reduce radiation exposure time. The use of this guide device can make screw fixation for femoral neck fracture easier.

scholarly journals Validation of use of transverse acetabular ligament and mechanical angle guide device to orient the acetabular cup

2020 ◽  
Vol 11 ◽  
pp. S766-S771
Author(s):  
Archit Agarwal ◽  
Inder Pawar ◽  
Sandeep Singh ◽  
Deepti Randev ◽  
Hem Chandra Sati
Keyword(s):  
Acetabular Cup ◽  
Guide Device ◽  
Transverse Acetabular Ligament

Guide device for percutaneous placement of translaminar facet screws after anterior lumbar interbody fusion

2003 ◽  
Vol 98 (1) ◽  
pp. 100-103 ◽  
Author(s):  
Jee Soo Jang ◽  
Sang Ho Lee ◽  
Sang Rak Lim
Keyword(s):  
Interbody Fusion ◽  
Screw Fixation ◽  
Anterior Lumbar Interbody Fusion ◽  
Posterior Fixation ◽  
Foraminal Stenosis ◽  
Lumbar Interbody Fusion ◽  
Content Type ◽  
Guide Device ◽  
Fine Print

Because the degree of immediate stabilization provided by cage-assisted anterior lumbar interbody fusion (ALIF) has been shown by several studies to be inadequate, supplementary posterior fixation, such as that created by translaminar or transpedicle screw fixation, is necessary. In this study, the authors studied the ALIF-augmentation procedure in which a special guide device is used to place percutaneously translaminar facet screws in 18 patients with degenerative lumbar disease. The minimum follow-up period was 1 month (mean 6 months, range 1–13 months). Degenerative spondylolisthesis with foraminal stenosis was diagnosed in nine patients, associated degenerative disc disease alone or combined with foraminal stenosis in eight, and recurrent disc herniation in one. Following screw placement, computerized tomography scanning was conducted to evaluate the accuracy of the facet screw positioning. All screws were properly placed. No screw penetrated the spinal canal or injured the neural structures. Excellent or good clinical outcomes were demonstrated in all patients at the last follow up. The use of this guide device for post—ALIF percutaneous translaminar facet screw fixation represents a safe, accurate, and minimally invasive modality with which to achieve immediate solid fixation in the lumbar spine.

scholarly journals Teachers’ Proffesional in Integrating Material of Semangko Faulth and Megatrush Mentawai in Learning Geography at Senior High School in Indonesia

2017 ◽  
Vol 1 (2) ◽  
pp. 255
Author(s):  
Muhammad Ilham
Keyword(s):  
Classroom Management ◽  
Teaching And Learning ◽  
Learning Activity ◽  
Master Plan ◽  
The Core ◽  
Learning Procedure ◽  
Environmental Materials ◽  
Guide Device ◽  
Opening Stage ◽  
Core Activity

The purpose of this research was to describe and analysis of teachers’ professional in integrating material of semangko faulth and megatrush Mentawai in learning geography. This research was a descriptive qualitative research. The data collection techniques used were observation, interviews, and documentation. The informants in this study were teachers of the geography of SMA Negeri 1 Ampek Angkek Kabupaten Agam as much as 2 teachers. Data analysis used reduction, data presentation, and conclusion. The results showed that: professional level of teachers in the integration materials of Faulth Semangko and Megatrush Mentawai in geography learning was 71.56% with the two categories, the ability to plan the organization in the integration of the material Semangko Faulth and Megatrush Mentawai. Teachers were not maximized although this integration was submitted by adjusting the conditions and situations that occur in the environment. The master plan of Teaching and Learning Activity Management that with reference to the achievement of competence and select and prepare appropriate learning procedure (steps teach) in accordance with the curriculum guide device. Teachers have to maximize its ability to plan classroom management and observes the conditions and situation of student learning in the opening stage, the core activity, closing activities, and assessment. Teachers also plan the use of media and learning resources were better at each of meetings. Teachers plan an assessment of student achievement in geography on human and environmental materials as a result of the dynamics of the lithosphere.

scholarly journals Guide Device

2020 ◽  
Author(s):  
Keyword(s):  
Guide Device

Resource Scalability at Wave Energy Test Sites

2014 ◽  
Author(s):  
Brendan Cahill
Keyword(s):  
Wave Energy ◽  
Energy Resource ◽  
Ocean Waves ◽  
Primary Objective ◽  
Full Scale ◽  
Physical Models ◽  
Small Scale ◽  
Marine Energy ◽  
Lake Washington ◽  
Guide Device

Harnessing the power of ocean waves offers enormous potential as a source of renewable energy. To date the technologies for capturing this resource, collectively known as wave energy converters (WECs), have yet to reach commercial viability and continued research and development efforts are required to move wave energy to the industrial scale. Integral to this process is ensuring that technologies progress along a staged development pathway; proving WEC concepts using small scale physical models in controlled settings such as laboratory wave tanks before eventually advancing to testing sub-prototype and full scale devices in real sea conditions. The primary objective of this research is to improve the understanding of how best to address the scaling of wave resource measurements and wave energy device power production when analyzing the results of sea-trials. This paper draws on measured data from three test sites; Galway Bay in Ireland, the Pacific Marine Energy Test Centre off the coast of Oregon, and Lake Washington, and assesses how accurately they recreate, at reduced scale, the conditions that commercial WEC installations are likely to encounter at exposed deployment locations. Appropriate techniques for extrapolating these results to predict the performance of commercial WECs at energy-rich locations on the west coasts of Ireland and the US are also demonstrated and discussed. The output from this research will be a set of protocols for addressing wave energy resource scalability to help guide device developers through this important stage of technology progression. Improved knowledge regarding resource scalability will allow for more streamlined progression of WEC concepts from wave tanks to sea-trials, and eventually to full-scale ocean deployment. It will also result in a reduced uncertainty about device power output and survivability, which are key drivers in determining the economic viability of projects.

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