scholarly journals Visuo-Haptic Simulations to Understand the Dependence of Electric Forces on Distance

2020 ◽  
Vol 10 (20) ◽  
pp. 7190
Author(s):  
Luis Neri ◽  
Víctor Robledo-Rella ◽  
Rosa María Guadalupe García-Castelán ◽  
Andres Gonzalez-Nucamendi ◽  
David Escobar-Castillejos ◽  
...  
Keyword(s):  
Point Charge ◽  
Engineering Students ◽  
Statistical Significance ◽  
Potential Effect ◽  
Learning Gains ◽  
Design Elements ◽  
Line Charge ◽  
Before And After ◽  
Haptic Simulations ◽  
Post Test

In this paper, the potential of visuo-haptic simulators to help engineering students to understand the nature of electric forces between different electric charge distributions is addressed. Three visuo-haptic simulators were designed to perceive the attractive–repulsive behavior as well as the dependence on distance of electrical forces for: (a) point charge, (b) line charge, and (c) plane charge. Design elements were incorporated to improve the 3D perception of the simulators. A sample of N = 111 engineering students practiced with the simulators: 87 enrolled in an Electricity and Magnetism course and 24 enrolled in a more advanced Electromagnetic Fields course. Pre-test and Post-test were applied before and after working with the simulators and average learning gains were obtained. t-tests were performed to determine the statistical significance of the results. Significant learning gains were obtained for the comprehension of the force dependence in the case of line charge and plane charge, but not for the point charge, due to the fact that most students started with very high Pre-test scores in this last case. These results suggest that the use of visuo-haptic simulators may help students to better identify the dependence of electric forces on distance. It was also observed that the potential effect of improving the recognition of electric interactions was higher among students with lower previous familiarity with these topics, as compared to more advanced students. Through exit surveys, it was found that the students liked very much the haptic activity and that it sparked their interest in learning new physical concepts.

Training of Spatial Ability on Engineering Students Through a Remedial Course Based on Augmented Reality

2012 ◽  
Author(s):  
Jorge Martín-Gutiérrez ◽  
Cristina Roca González ◽  
Melchor García Domínguez
Keyword(s):  
Augmented Reality ◽  
Spatial Ability ◽  
Visual Information ◽  
Engineering Students ◽  
Statistical Significance ◽  
Control Group ◽  
Spatial Skills ◽  
Specific Training ◽  
Before And After ◽  
Spanish Universities

This paper presents the results of a study designed to evaluate the effect of attending an intensive remedial course based on desktop augmented reality exercises to improve the spatial ability of freshman engineering students. Many of these students have problems in managing visual information or in creating mental models of objects represented by their orthographic projections. The study reports about research on comparison tests about the spatial skills of engineering students from two Spanish universities before and after performing a specific training for improving these abilities. The training was completed by 66 students as participants, considering a control group composed of 25 students from both universities. Results show that students from both universities improve their spatial ability and there is no statistical significance between students from both universities, neither before nor after training, so we may conclude that training’s effect on both universities is analogue.

scholarly journals Training With Augmented Reality on Engineering Degrees

2012 ◽  
Author(s):  
Cristina Roca González ◽  
Melchor García Domínguez ◽  
Jorge Martín-Gutierrez ◽  
Manuel Contero ◽  
Mariano Alcañiz
Keyword(s):  
Augmented Reality ◽  
Engineering Students ◽  
Statistical Significance ◽  
Control Group ◽  
3D Objects ◽  
Spatial Skill ◽  
Before And After ◽  
Augmented Reality Technology ◽  
Spanish Universities ◽  
Comparison Of Tests

This paper reports about the research based on the comparison of tests about the spatial skill of engineering students from two Spanish universities before and after the performance of specific training for improving several abilities based on tasks with 3D objects visualized through augmented reality technology. The training was completed at home with 66 students as participants, considering a control group composed of 25 students from both universities. The AR system technical aspects are also described as well as the application developed. The study’s results show that students from both universities improve their spatial ability and there is no significant statistical significance between students from both universities, neither before nor after training so we may conclude that training’s effect on both universities is analogue.

scholarly journals Visualization of Accessory Lymphatic Pathways, before and after Manual Drainage, in Secondary Upper Limb Lymphedema Using Indocyanine Green Lymphography

2019 ◽  
Vol 8 (11) ◽  
pp. 1917
Author(s):  
María Elena Medina-Rodríguez ◽  
María de-la-Casa-Almeida ◽  
Efrén Martel-Almeida ◽  
Arminda Ojeda-Cárdenes ◽  
Esther M. Medrano-Sánchez
Keyword(s):  
Indocyanine Green ◽  
Upper Limb ◽  
Statistical Significance ◽  
Infrared Camera ◽  
Lymphatic Drainage ◽  
Secondary Lymphedema ◽  
Before And After ◽  
Post Test ◽  
After Cancer ◽  
Lymphatic Pathways

Manual Lymphatic Drainage (MLD) appears to stimulate lymphatic contraction, aid in the development of secondary derivation pathways, and stimulate the appearance of collateral pathways that could function as the main drainage routes of the limb in case of lymphedema. Through stretching, call up maneuvers are used to stimulate lymphangion reflex contraction and, therefore, lymphatic function. The aim was to describe the presence of areas and pathways of collateral lymphatic drainage under basal conditions and to determine, using Indocyanine Green (ICG) lymphography, whether an increase in these pathways occurs after 30 min of manual lymphatic stimulation with only call up maneuvers according to the Leduc Method®®. In this prospective analytical study (pretest–posttest), the frequency of presentation of areas and collateral lymphatic pathways was analyzed in 19 patients with secondary lymphedema of the upper limb after breast cancer using an infrared camera. Analyses were completed at three time points: after ICG injection, at baseline (pretest), and after the application of MLD (post-test). The Leduc Method maneuvers were applied to the supraclavicular and axillary nodes, chest, back, Mascagni, and Caplan pathways. The areas visualized in the pretest continued to be visible in the posttest. Additional pathways and fluorescent areas were observed after the maneuvers. The McNemar test showed statistical significance (p = 0.008), the odds ratio was infinite, and the Cohen’s g value was equal to 0.5. Manual stimulation by call up maneuvers increased the observation frequency of areas and collateral lymphatic pathways. Therefore, ICG lymphography appears to be a useful tool for bringing out the routes of collateral bypass in secondary lymphoedema after cancer treatment.

scholarly journals The Effect of Electronic Flashcards on EFL Students' Vocabulary Learning: The Case of Saudi Arabia

2020 ◽  
Vol 1 (2) ◽  
pp. 114-125
Author(s):  
Asma A. Alghamdi ◽  
Tariq Elyas
Keyword(s):  
Saudi Arabia ◽  
Quantitative Research ◽  
Vocabulary Learning ◽  
Statistical Significance ◽  
Control Group ◽  
Before And After ◽  
Post Test ◽  
Quasi Experimental ◽  
Preparatory Year ◽  
Experimental Group

This study aimed to investigate the effect of electronic flashcards on EFL vocabulary learning of preparatory-year female students at a  Saudi Arabia. It was conducted following the quantitative research methodology with a quasi-experimental design. Two groups were assigned: an experimental group who used electronic flashcards, and a control group who employed the traditional method of vocabulary learning. A pre-test and a post-test were administered in order to appraise their performance before and after the experiment. The results revealed that the post-test scores of students in the experimental group were significantly higher than their pre-test. Also, the results showed that electronic flashcards promoted students' vocabulary, causing a statistical significance in comparison to the control group. Based on these findings, this study was able to draw a number of implications and recommendations

scholarly journals Fostering Sustainability and Critical Thinking through Debate—A Case Study

2021 ◽  
Vol 13 (11) ◽  
pp. 6397
Author(s):  
Alfonso Rodriguez-Dono ◽  
Antoni Hernández-Fernández
Keyword(s):  
Critical Thinking ◽  
Engineering Students ◽  
Teaching Method ◽  
Student Evaluation ◽  
University Teaching ◽  
Before And After ◽  
Post Test ◽  
Efficient Learning ◽  
Knowledge Survey

Transversal competences such as sustainability or critical thinking have become more important in the last decades in University teaching. The objective of this article is to assess the effectiveness of debate as a teaching method capable of fostering such competences in engineering students. To do this, a debate activity has been held facing two reasonable positions: Sustainable Development versus Degrowth. The research methodology consisted of performing this activity in the classroom (with 13 students in this particular case study), and conducting some tests before and after the debate that served as feedback to assess the effectiveness of the debate on the learning process. This feedback is composed of different documents, including a pre-post test, a specific survey about the debate, a pre-post knowledge survey and the Student Evaluation of Educational Quality (SEEQ) survey. A methodology for the organization of the debate is proposed and the answers of the students to these feedback documents are analyzed. As it can be inferred from the different surveys, the debate has been an efficient learning tool to acquire knowledge and to develop sustainability and critical thinking competences.

scholarly journals The effect of life kinetic training on learning of shot put glide technique and motoric parameters

2021 ◽  
Vol 7 (3) ◽  
pp. 363-385
Author(s):  
Özlem Orhan ◽  
Ebru Çetin ◽  
Sezen Çimen Polat ◽  
İmdat Yarım
Keyword(s):  
Statistical Significance ◽  
Control Group ◽  
Significance Level ◽  
Warm Up ◽  
Before And After ◽  
Visual Reaction ◽  
Post Test ◽  
Research Students ◽  
Sports Sciences ◽  
Shot Put

This study determined the effect of life kinetic (LK) training on the learning of glide techniques, shot performance and motor parameters of students in the faculty of sports sciences. A total of 54 students, 24 females (19.2±2.1years) and 30 males (19.6 ± 1.9 years), who were studying in faculty of sports sciences participated in the research.  Students participated in the track and field lesson twice a week for 12 weeks. The experimental group was made to exercise LK training for 30 minutes before each lesson after the general warm-up. Before and after the 12-weeks of training, measurements were taken from students two times. Willcoxon T-test was applied in order to determine whether or not there were differences between the pre-test and post-test which were applied before and after the training program. Mann Whitney U test was used in order to determine whether or not there was a difference between the two groups. Statistical significance level was taken as p<0.05As a result of the research, statistically significant differences were determined between the experimental and control group in the shot put distance, glide technique, agility, visual reaction, auditory reaction parameters. In brief, it may be stated that LK training positively affected the development of skills and technical learning of students.  

Clinically Meaningful Change

Methodology ◽  
2019 ◽  
Vol 15 (3) ◽  
pp. 97-105
Author(s):  
Rodrigo Ferrer ◽  
Antonio Pardo
Keyword(s):  
Effect Size ◽  
False Negative ◽  
False Negative Rate ◽  
Point Of View ◽  
Skewed Distribution ◽  
Effect Sizes ◽  
False Negatives ◽  
Large Size ◽  
Before And After ◽  
Post Test

Abstract. In a recent paper, Ferrer and Pardo (2014) tested several distribution-based methods designed to assess when test scores obtained before and after an intervention reflect a statistically reliable change. However, we still do not know how these methods perform from the point of view of false negatives. For this purpose, we have simulated change scenarios (different effect sizes in a pre-post-test design) with distributions of different shapes and with different sample sizes. For each simulated scenario, we generated 1,000 samples. In each sample, we recorded the false-negative rate of the five distribution-based methods with the best performance from the point of view of the false positives. Our results have revealed unacceptable rates of false negatives even with effects of very large size, starting from 31.8% in an optimistic scenario (effect size of 2.0 and a normal distribution) to 99.9% in the worst scenario (effect size of 0.2 and a highly skewed distribution). Therefore, our results suggest that the widely used distribution-based methods must be applied with caution in a clinical context, because they need huge effect sizes to detect a true change. However, we made some considerations regarding the effect size and the cut-off points commonly used which allow us to be more precise in our estimates.

Perbedaan Pengetahuan Siswa Tentang Penyakit Hepatitis A Sebelum Dan Sesudah Penyuluhan Di MTsN 02 Bondowoso Tahun 2015

2017 ◽  
Vol 4 (2) ◽  
pp. 14
Author(s):  
Putri Megasari
Keyword(s):  
Hepatitis A ◽  
Hepatitis Virus ◽  
Sampling Technique ◽  
Mean Value ◽  
Test Design ◽  
The World ◽  
Before And After ◽  
Post Test ◽  
The Mean ◽  
Paired T Test

Hepatitis has become a health problem in the world. The hepatitis virus infected many people. According to the teacher of MTsN 02 Bondowoso more than 20 students have hepatitis A viral infection. The purpose of this research was to know the differences of students' knowledge about hepatitis A before and after counseling in MTsN 02 Bondowoso 2015. This study used pre-experimental (pre-post test design). This study used stratified random sampling technique, 127 students from 270 sample involved this research,and 143 students was excluded. We used questionnaires to collect data. The results showed that the mean value of the students 'knowledge about hepatitis A before counseling in MTsN 02 Bondowoso 2015 was 83.96 with the lowest value of 37.5 and the highest value was 100. The mean value of the students' knowledge about hepatitis A after counseling in MTsN 02 Bondowoso 2015 was 93.21 with the lowest value waf 62.5 and the highest value was 100. Paired t test showed that t (-9.07) > t table (1.98), the null hypothesis (H0) was rejected. There was a difference between students' knowledge about hepatitis A before and after counseling in MTsN 02 Bondowoso 2015. This study showed that routine counseling by healthcare provider was important to prevent hepatitis A infection.; Keywords: counseling, knowledge of students, hepatitis

Melatih Kepemimpinan Perangkat Desa Kebonharjo Kulonprogo: Membangun Sikap Anti Korupsi

2018 ◽  
Vol 1 ◽  
pp. 107
Author(s):  
Adi Heryadi ◽  
Evianawati Evianawati
Keyword(s):  
Transformational Leadership ◽  
Data Collection ◽  
Paired Samples ◽  
Significant Difference ◽  
Before And After ◽  
Post Test ◽  
Sample Test ◽  
Corruption Perception ◽  
Measuring Tool

This study aims to prove whether transformational leadership training is effective for building anti-corruption attitudes of villages in Kebonharjo village, subdistrict Samigaluh Kulonprogo. This research is an experimental research with one group pre and posttest design.Subject design is 17 people from village of 21 candidates registered. Measuring tool used in this research is the scale of anti-corruption perception made by the researcher referring to the 9 anti-corruption values with the value of reliability coefficient of 0.871. The module used as an intervention made by the researcher refers to the transformational leadership dimension (Bass, 1990). The data collected is analyzed by statistical analysis of different test Paired Sample Test. Initial data collection results obtained sign value of 0.770 which means> 0.05 or no significant difference between anti-corruption perception score between before and after training. After a period of less than 1 (one) month then conducted again the measurement of follow-up of the study subjects in the measurement again using the scale of anti-corruption perception. The results of the second data collection were analysed with Paired Samples Test and obtained the value of 0.623 sign meaning p> 0.05 or no significant difference between post test data with follow-up data so that the hypothesis of this study was rejected.

STUDY CLINICAL FEATURE AND RESULT OF TREATMENT PHACOMORPHIC GLAUCOMA

2015 ◽  
pp. 71-75
Author(s):  
Van Nam Phan ◽  
Ba Ken Tran
Keyword(s):  
Visual Acuity ◽  
Intraocular Pressure ◽  
Statistical Significance ◽  
Corneal Edema ◽  
Clinical Feature ◽  
Anterior Chamber Angle ◽  
Male Population ◽  
Significant Difference ◽  
Operative Complications ◽  
Before And After

Purpose: Study clinical feature of phacomorphic glaucoma. To evaluate the result of treatment phacomorphic glaucoma. Method: The retrospective, interventional study on 36 cases with phacomorphic glaucoma who underwent treated at Hue Central Hospital from 6/2010 to 6/2011. Standard of research: visual, IOP, before and after surgery, accompanying lesions and post-operative complications. The surgery is considered successful when postoperative IOP less than 21 mmHg. Results: Age 50-59 presented 30.5 percent, ≥ 60 presented 91.7 percent. There was a slight female preponderance (66.7%) compared to the male population (33.3%) which implies a statistically marginally significant difference. However there was no statistical significance difference when compared by the two subgroups. Patient in country presented 61,1% and city presented 38,9%. The duration between the onset of pain and surgery from 0 to < 5 days (77.8%), from 6 to 10 (16.7%) and >10 days presented 5.5%. The preoperative intraocular pressure 35 to 45mmHg (47.2%), 46-55 (30.6%), 56-65 (13.9%) and more than 65 presented 8.3%. The visual acuity preoperation less than 1metre count finger (94.5%), less than 3 metre count finger presented 5.5%. Close anterior chamber angle presented 80.6% and shallow was presented 19.4%. Corneal edema presented 100%, iritis presented 94.4%, dilated pupil larger 5mm presented 83.3%, Synchynea iris and cataract presented 72.2%. ECCE, implantation IOL combined trabeculectomy presented 11.1%, Phaco, implantation IOL combined trabeculectomy presented 69,5%, ECCE implantation IOL presented 5.6%, Phaco, implantation IOL presented 13.8%. Postoperative visual acuity from 1/10 to 5/10 presented 72.2%, no case have VA larger than 5/10. Postoperative 3 months VA 1/10 to 5/10 presented 72.2%, larger VA 5/10 presented 8.3%. Postoperative 3 months intraocular pressure ≤ 21mmHg presented 91.7%, 22 to 24mmHg presented 8.3%, no case have IOP ≥25mmHg. Postoperative edema presented 58.3%, iritis presented 58.3%. Key words: phacomorphic Glaucoma

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