scholarly journals MARINS: A Mobile Smartphone AR System for Pathfinding in a Dark Environment

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3442 ◽  
Author(s):  
Pei-Huang Diao ◽  
Naai-Jung Shih
Keyword(s):  
Indoor Navigation ◽  
Control Group ◽  
Relative Location ◽  
Localization And Mapping ◽  
Floor Plans ◽  
Indoor Navigation System ◽  
Mobile Ar ◽  
And Function ◽  
Mobile Smartphone ◽  
Experimental Group

Traditional egress routes are normally indicated on floor plans and function as designed, assuming that people can identify their relative location and orientation. However, the evacuation process can easily become complicated in a dark or hazardous environment with potential blockage of unexpected obstacles. This study developed the mobile AR indoor navigation system (MARINS) using a smartphone as a device to guide users to exits in a 0-lux setting with the path only illuminated by the phone camera’s LED. The system is developed using Apple ARKit SDK with the associated simultaneous localization and mapping (SLAM) function on a Unity platform in four modules. A maze scenario is planned in an environment built by carton walls. Time and distance traveled by the experimental group and the control group are measured. The results of statistical analysis demonstrate that the MARINS system can reduce travel time in known space and in total summation compared to the application of a traditional map. The system also reduces travel distance and misjudgments with higher system usability than the application of a traditional map.

Smartphone-Based Indoor Visual Navigation with Leader-Follower Mode

2021 ◽  
Vol 17 (2) ◽  
pp. 1-22
Author(s):  
Jingao Xu ◽  
Erqun Dong ◽  
Qiang Ma ◽  
Chenshu Wu ◽  
Zheng Yang
Keyword(s):  
Real Time ◽  
Environmental Changes ◽  
State Of The Art ◽  
Visual Navigation ◽  
Indoor Navigation ◽  
Location Services ◽  
Localization And Mapping ◽  
Leaders And Followers ◽  
Indoor Navigation System ◽  
Free Pair

Existing indoor navigation solutions usually require pre-deployed comprehensive location services with precise indoor maps and, more importantly, all rely on dedicatedly installed or existing infrastructure. In this article, we present Pair-Navi, an infrastructure-free indoor navigation system that circumvents all these requirements by reusing a previous traveler’s (i.e., leader) trace experience to navigate future users (i.e., followers) in a Peer-to-Peer mode. Our system leverages the advances of visual simultaneous localization and mapping ( SLAM ) on commercial smartphones. Visual SLAM systems, however, are vulnerable to environmental dynamics in the precision and robustness and involve intensive computation that prohibits real-time applications. To combat environmental changes, we propose to cull non-rigid contexts and keep only the static and rigid contents in use. To enable real-time navigation on mobiles, we decouple and reorganize the highly coupled SLAM modules for leaders and followers. We implement Pair-Navi on commodity smartphones and validate its performance in three diverse buildings and two standard datasets (TUM and KITTI). Our results show that Pair-Navi achieves an immediate navigation success rate of 98.6%, which maintains as 83.4% even after 2 weeks since the leaders’ traces were collected, outperforming the state-of-the-art solutions by >50%. Being truly infrastructure-free, Pair-Navi sheds lights on practical indoor navigations for mobile users.

scholarly journals Does Motor Training of the Nonparetic Side Influences Balance and Function in Chronic Stroke? A Pilot RCT

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Shanta Pandian ◽  
Kamal Narayan Arya ◽  
Dharmendra Kumar
Keyword(s):  
Functional Performance ◽  
Berg Balance Scale ◽  
Chronic Stroke ◽  
The Body ◽  
Control Group ◽  
Therapy Program ◽  
Functional Reach Test ◽  
Double Blinded ◽  
And Function ◽  
Experimental Group

Background. Balance and functional abilities are controlled by both sides of the body. The role of nonparetic side has never been explored for such skills.Objective. The objective of the present study was to examine the effect of a motor therapy program primarily involving the nonparetic side on balance and function in chronic stroke.Method. A randomized controlled, double blinded trial was conducted on 39 poststroke hemiparetic subjects (21, men; mean age, 42 years; mean poststroke duration, 13 months). They were randomly divided into the experimental group(n=20)and control group(n=19). The participants received either motor therapy focusing on the nonparetic side along with the conventional program or conventional program alone for 8 weeks (3 session/week, 60 minutes each). The balance ability was assessed using Berg Balance Scale (BBS) and Functional Reach Test (FRT) while the functional performance was measured by Barthel Index (BI).Result. After intervention, the experimental group exhibited significant(P<0.05)change on BBS (5.65 versus 2.52) and BI (12.75 versus 2.16) scores in comparison to the control group.Conclusion. The motor therapy program incorporating the nonparetic side along with the affected side was found to be effective in enhancing balance and function in stroke.

scholarly journals Effects of exercise combined with whole body vibration in patients with patellofemoral pain syndrome: a randomised-controlled clinical trial

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Angel Yañez-Álvarez ◽  
Beatriz Bermúdez-Pulgarín ◽  
Sergio Hernández-Sánchez ◽  
Manuel Albornoz-Cabello
Keyword(s):  
Clinical Trial ◽  
Lower Limb ◽  
Repeated Measures ◽  
Whole Body Vibration ◽  
Patellofemoral Pain ◽  
Whole Body ◽  
Control Group ◽  
Body Vibration ◽  
And Function ◽  
Experimental Group

Abstract Background Patellofemoral pain is a prevalent condition in the general population, especially in women, and produces functional impairment in patients. Therapeutic exercise is considered an essential part of the conservative management. The use of vibration platforms may help improve strength and function and reduce pain in patients with knee disorders. The aim of this investigation was to determine the effects of adding whole body vibration (vertical, vibration frequency of 40 Hz, with an amplitude from 2 to 4 mm) to an exercise protocol for pain and disability in adults with patellofemoral pain. Methods A randomised clinical trial was designed, where 50 subjects were randomly distributed into either an exercise group plus whole body vibration or a control group. Pain, knee function (self-reported questionnaire) and range of motion and lower limb functionality were assessed at baseline and at 4 weeks. The experimental group performed 12 supervised sessions of hip, knee and core strengthening exercises on a vibration platform 3 times per week during 4 weeks. The control group followed the same protocol but without vibration stimuli. Differences in outcome measures were explored using an analysis of the variance of 2 repeated measures. Effect sizes were estimated using Square Eta (η2). Significant level was set al P < 0.05. Results Statistically significant differences were found after intervention in favour of the experimental group in the between-groups comparison and in the interaction of the experimental group before and after treatment in terms of pain perception (P = 0.000; η2 = 0.63) and function outcomes scores (P = 0.000; η2 0.39 and 0.51 for lower limb functional scale and Kujala scores respectively). Conclusion A 4-week whole body vibration exercise programme reduces pain level intensity and improves lower limb functionality in patellofemoral pain patients and is more effective than exercise alone in improving pain and function in the short-term. Trial registration ClinicalTrials.gov (NCT04031248). This study was prospectively registered on the 24th July, 2019.

scholarly journals Short - Term Effects of Eccentric Hip Abductors and Lateral Rotators Strengthening In Sedentary People with Patellofemoral Pain Syndrome on Pain and Function : A Randomized Control Trail

2016 ◽  
Vol 06 (01) ◽  
pp. 068-073
Author(s):  
Kavitha Shetty ◽  
Lawrence Mathias ◽  
Mahesh V. Hegde ◽  
Sukumar Shanmugam
Keyword(s):  
Statistical Significance ◽  
Pain Syndrome ◽  
Patellofemoral Pain ◽  
Control Group ◽  
Short Term ◽  
Strengthening Exercises ◽  
Post Test ◽  
Hip Abductor ◽  
And Function ◽  
Experimental Group

Abstract Purpose: To investigate the influence of additional eccentric strengthening to the hip abductor and lateral rotator musculature on pain and function in sedentary people with Patellofemoral pain syndrome (PFPS). Methods: 30 sedentary patients between 18 and 40 years of age, with a diagnosis of PFPS, all the subjects received treatment for a period of 4weeks and the subjects were randomly assigned to Control group (CG) and Experimental group (EG). The patients in the Control group (n = 15) performed a conventional knee-stretching and strengthening program, whereas, patients in the Experimental group (n = 15) performed the same exercises as those in the control group ,in addition received eccentric strengthening exercises for the hip abductors and lateral rotators. An 11-point numeric pain rating scale (NPRS), the Lower Extremity Functional Scale (LEFS) and the Anterior Knee Pain Scale (AKPS) were used as outcome measures during the baseline and at the end of 4weeks . Results: Statistics were retrieved using SPSS.16, paired 't' test was conducted to compare AKPS and LEFS values ,whereas, Mann- Whitney U test was used for NPRS value between the groups. After 4 weeks of treatment, the control group, pre and post-test value for AKPS (p<0.001),LEFS (P<0.001),NPRS (p<0.001) shows a statistical significance and even in the experimental group, pre and post-test value for AKPS (p<0.001),LEFS (P<0.001),NPRS (p<0.001) shows a statistical significance in pain and function, but comparing both the group experimental group is significantly more better AKPS (p=0.002),LEFS (P<0.001),NPRS (P<0.001) then a control group. Conclusion: short term Knee strengthening exercises supplemented by eccentric hip abductor and lateral rotator musculature–strengthening exercises were more effective than knee exercises alone in improving function and reducing pain in sedentary people with PFPS.

scholarly journals The Teaching Method of Basketball Training Based on Intelligent Network Multimedia Technology

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Chao Han ◽  
Mei Wang ◽  
Aiping Yan
Keyword(s):  
Oral Language ◽  
Teaching Method ◽  
Control Group ◽  
Multimedia Technology ◽  
Intelligent Network ◽  
Traditional Sports ◽  
Total Proportion ◽  
Sports Skills ◽  
And Function ◽  
Experimental Group

In the traditional sports basketball teaching, people gradually find that the simple use of body language and oral language as the carrier of teaching sports skills and theoretical knowledge has certain limitations. Therefore, we begin to focus on the combination of network multimedia technology (NMT) and basketball training teaching (BTT). This article mainly studies the teaching method of basketball training based on NMT. This article expounds the concept and function of multimedia teaching, puts forward suggestions on BTT methods based on NMT, and studies the making method of multimedia basketball training (MBT) courseware. Through the questionnaire survey and experimental research, this article analyzes the influence of MBT on basketball teaching, the effectiveness of multimedia basketball students’ mastery, the evaluation results of MBT, and the evaluation of experimental group students on MBT. In this study, 100 students were selected as the experimental objects, a group of 50 people for the basic basketball action test, one group had a period of multimedia basketball teaching, and the other group still carried on according to the traditional basketball teaching method. The results show that in the experiment of MBT, the total proportion of the experimental group is 56.61% and the control group is 33.72%; the experimental group is 57.28% and the control group is 42.35%; the experimental group is 63.26% and the control group is 32.79%; and the experimental group is 70.56% and 37% in the control group.

Effect of Nitrogen Oxide on the Gums Lamina propria Structure and Function in the Experimental Gastritis, Duodenitis and Pharmacological Correction

2017 ◽  
Vol 30 ◽  
pp. 86-96
Author(s):  
Y.G. Romanenko ◽  
V.I. Mamchur ◽  
A.E. Levykh
Keyword(s):  
Nitrogen Oxide ◽  
Lamina Propria ◽  
Vascular Wall ◽  
Structure And Function ◽  
Control Group ◽  
Blood Plasma Proteins ◽  
Wall Permeability ◽  
And Function ◽  
The Given ◽  
Experimental Group

In the conditions of experi mental chronic gastritis and duodenitis reproduction, carried out among Wistar line 24 rats, was investigated effect of the nitrogen oxide stable metabolites content in the gums homogenates on a lamina propria structure and function. Results of our research have been shown, that level of nitrogen oxide stable metabolites in the rats’ gums tissues homogenates with gastritis and duodenitis decreased in three times, compared with a same period at the intact animals, which indicated about depletion of a nitrogen oxide depot at the given disease. It was revealed a significant decrease typical for the protein and glycoprotein content in the animals gums tissues at the experimental group, which indicated about the catabolic processes predominance. Amount of hexosamines in the gums was significantly increased, which was correlated with a morphological picture (gums lamina propria impregnation with the blood plasma proteins), testified about a change in the vascular wall permeability and microcirculation disruption. In the animals from experimental group was reduced a height of gums papillae connective tissue to 27.18±1.86 x 10-6 m against 56.93±2.64 x 10-6 m in the rats from control group. In the gums lamina propria defines phenomenon of the papillary and reticular layer fibrosis. After medicamentous correction, carried out with an antioxidant and the nitrogen oxide donor was observed repairing structure of the gums lamina propria on a background of increasing microvasculature area. It was determined significantly increased protein and glycoprotein content in the gums tissues with increased levels of nitrogen oxide metabolites.

scholarly journals Development and Application of an Augmented Reality Oyster Learning System for Primary Marine Education

Electronics ◽  
2021 ◽  
Vol 10 (22) ◽  
pp. 2818
Author(s):  
Min-Chai Hsieh
Keyword(s):  
Primary Schools ◽  
Online Courses ◽  
Teaching Strategy ◽  
Learning System ◽  
Control Group ◽  
Learning Approach ◽  
Fourth Grade Students ◽  
Marine Education ◽  
Mobile Ar ◽  
Experimental Group

Marine knowledge is such an important part of education that it has been integrated into various subjects and courses across educational levels. Previous research has indicated the importance of AR assisted students’ learning during the learning process. This study proposed the AR Oyster Learning System (AROLS) that integrates mobile AR with a marine education teaching strategy for teachers in primary schools. To evaluate the effectiveness of the proposed approach, an experiment was conducted in a primary school natural science course regarding oysters. The participants consisted of 22 fourth-grade students. The experimental group comprised 11 students who learned with the AROLS learning approach and the control group comprised 11 students who learned with the conventional multimedia learning approach. The results indicate that (1) students were interested in the AR learning approach, (2) students’ learning achievement and motivation were improved by the AR learning approach, (3) students acquired the target knowledge through the oyster course, and (4) students learned the importance of sustainability when taking online courses at home during the pandemic.

scholarly journals Effects of ’’Throwers Ten’’ Exercise Program on Pain and Function in Shoulder Impingement Syndrome

2014 ◽  
Vol 2 (11_suppl3) ◽  
pp. 2325967114S0015
Author(s):  
Zeynep Hazar ◽  
Gul Baltacı
Keyword(s):  
Exercise Program ◽  
Impingement Syndrome ◽  
Wilcoxon Test ◽  
Control Group ◽  
Dash Score ◽  
Shoulder Impingement Syndrome ◽  
Physical Treatment ◽  
Shoulder Impingement ◽  
And Function ◽  
Experimental Group

Objectives: The purpose of this study was to examine the effects of Throwers Ten (T10) exercise program on pain and function in patients with shoulder impingement syndrome. Methods: Twenty subjects who were assigned by random sampling to an experimental group (n=10) to which Throwers Ten (T10) exercise and a control group (n=10) to which ordinary physical treatment were applied. A 100 mm visual analogue scale (VAS) was used to evaluate the degree of pain. The Disability of Arm, Hand, and Shoulder (DASH) score was used to assess the functions of the upper extremity. To determine the range of motion, a universal goniometer was used to measure range of shoulder motion. Wilcoxon test was employed to examine differences in pain and function of the experimental group and the control group before and after the treatment. Results: There were significant differences in function and pain of the experimental group (p<0.05). The therapeutic effect in the experimental and control groups revealed significant differences in flexion, abduction, VAS and the DASH (p< 0.05); respectively. Conclusion: The results of this study suggest that Throwers Ten (T10) exercise would be positively affected pain alleviation and functional recovery in shoulder impingement patients.

scholarly journals Análise microscópica na articulação temporomandibular a partir da mudança de direção do vetor de força da mandíbula em relação à base do crânio : estudo experimental em coelhos (Oryctolagus cuniculus l.)

2021 ◽  
Vol 40 (2) ◽  
pp. 66-72
Author(s):  
Deise Ponzoni ◽  
Edela Puricelli
Keyword(s):  
Temporal Bone ◽  
Oryctolagus Cuniculus ◽  
Mandibular Condyle ◽  
Structure And Function ◽  
Control Group ◽  
Articular Disc ◽  
Direction Change ◽  
The Moment ◽  
And Function ◽  
Experimental Group

The correlation between TMJ's growing, structure and function is consensual in the specialized literature. Until the moment, the little knowledge about post-birth changes are studied by observation of condylar growth and disc reestructuration. In an experimental model in rabbits (Oryctolagus cuniculus 1.), it was observed tecidual alterations of the TMJ's components — mandibular condyle, articular disc and temporal bone, face to a direction change of mandibular power axis, which has the incidence upon these structures. Twentyfour rabbit were divided in four groups. Two of each group formed a control group. Four experimental periods were established 15, 30, 60 and 90 days. The animals from the experimental group were submitted to surgical procedure involving the mandible right side, changing the direction of mandibular power axis, which has incidence in the TMJ. Histological observations of TMJ in the control group, at different times, the growth and development of this structure were showed, compatible to the normality. At experimental group, the change of mandibular power axis caused alteration of the mandibular condyle and the discal structure. Significative responses at temporal bone were observed too, as a process of osseous modelation, suggestive of growth of this cranial structure.

scholarly journals Effects of Combining Diaphragm Training with Electrical Stimulation on Balance, Pain, and Function in Athletes with Chronic Low Back Pain : A Randomized Clinical Trial

2020 ◽  
Author(s):  
Khadijeh Otadi ◽  
Noureddin Nakhostin Ansari ◽  
Shahriar Sharify ◽  
Zahra Fakhari ◽  
Hadi Sarafraz ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Dynamic Balance ◽  
Static Stability ◽  
Core Stability ◽  
Control Group ◽  
Low Back ◽  
Young Athletes ◽  
Post Intervention ◽  
And Function ◽  
Experimental Group

Abstract Background: It is unknown how diaphragm training combined with electrical stimulation affect balance, core stability, pain, and function in athletes with chronic low back pain (CLBP). This study aimed to explore the effects of combining diaphragm training with electrical stimulation on core stability, dynamic balance, pain, and function in young athletes with nonspecific CLBP.Methods: The design was a randomized clinical trial A total of 24 young adult athletes (12 women, 12 men) with non-specific CLBP were randomly allocated into experimental and control group. The experimental group received diaphragm training plus Transcutaneous Electrical Nerve Stimulation (TENS), while the control group received only TENS. Both groups underwent 12 sessions over a 4-week period. Static stability, dynamic balance, pain, and function were measured pre- and post-intervention.Results: Significant improvements in pain and function scores were found in both groups after completing the interventions. However, only the experimental group showed significant improvements in the static stability and dynamic balance post-intervention. The experimental group showed greater improvements in pain and static stability. No significant differences in function or dynamic balance were observed between the groups. Conclusions: The present study indicates that diaphragm training plus TENS can improve static stability, dynamic balance, function, and pain in young athletes with non-specific CLBP. It seems beneficial to add diaphragm training to rehabilitation programs for athletes with CLBP.Trial registration: The trial was retrospectively registered at the Iranian Registry of Clinical Trials on www.irct.ir (Identification number: IRCT20090228001719N8).

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