Blindness Visualizer: A Simulated Navigation Experience

Author(s):  
Claudia Krogmeier ◽  
Justin Heffron ◽  
Justin Legare ◽  
Michael Nelson ◽  
Ziyi Liu ◽  
...  
Author(s):  
J. Yan ◽  
S. Zlatanova ◽  
A. A. Diakite

Abstract. Navigation is very critical for our daily life, especially when we have to go through the unfamiliar areas where the spaces are very complex, such as completely bounded (indoor), partially bounded (semi-indoor and/or semi-outdoor), entirely open (outdoor), or combined. Current navigation systems commonly offer the shortest distance/time path, but it is not always appropriate for some situations. For instance, on a rainy day, a path with as many places that are covered by roofs/shelters is more attractive. However, current navigation systems cannot provide such kinds of navigation paths, which can be explained by that they lack information about such roofed/sheltered-covered spaces. This paper proposes two roofed/sheltered navigation path options by employing semi-indoor spaces in the navigation map: (i) the Most-Top-Covered path (MTC-path) and (ii) path to the Nearest sI-space from departure (NSI-path). A path selection strategy is introduced to help pedestrians in making choices between the two new path options and the traditional shortest path. We demonstrate and validate the research with path planning on two navigation cases. The results show the two path options and the path selection strategy bring in new navigation experience for humans.


2013 ◽  
Vol 12 (4) ◽  
pp. 224-232
Author(s):  
Gintaras Simutis ◽  
Mantas Drungilas ◽  
Pavel Petrik ◽  
Eglė Petrik ◽  
Virgilijus Beiša ◽  
...  

Background / objectiveThe study was carried out to evaluate the potential use of laparoscopic simulators to enhance basic laparoscopic skills until proficiency is reached.Materials and methodsThe study participants were divided into two groups according to their experience in laparoscopic procedures: no prior experience (group A; n = 16) and laparoscope navigation experience (group B; n = 16). All the participants performed nineattempts of three basic laparoscopic skill tasks (“Instrument navigation”, “Cutting”, “Clip applying”) on the LapSim® simulator during three sessions within one month. The distribution of practice sessions was standardized by performing three attemptsfor each task per session and no more than one session per week. The assessment of laparoscopic skills was based on the cumulative score for each task measured by the computer system.ResultsTrainees in the group A were younger (22.2 ± 1.3 vs. 26.1 ± 1.3 years, P < 0.001). There were statistically significant differences in cumulative scores for all three tasks after the first five attempts between the two groups (P < 0.001). Comparison of thecumulative scores for the task “Instrument navigation” after the sixth attempt (P = 0.073), for the task “Clip applying” after the seventh attempt (P = 0.287), and for the task “Cutting” after the eighth attempt (P = 0.080) showed no significant differences among the study groups.ConclusionsThe results indicated that a group of trainees with no prior laparoscopic experience acquired the basic laparoscopic skills significantly faster. Proficiency in the laparoscopic basic tasks was achieved within 6–8 repetitions in both groups. These findings suggest that training of practical skills in using laparoscopic simulators should be integrated into medical education much earlier.Key words: surgical education, simulation, laparoscopy, virtual reality simulator, LapSimBazinių laparoskopinių įgūdžių įgijimas studijuojant mediciną TikslasAtlikti tyrimą, siekiant įvertinti kompiuterinių laparoskopinių simuliatorių naudojimą medicinos studijoms mokant pagrindinių laparoskopinių operacijų įgūdžių, kol bus įgyta reikiama patirtis.MetodikaTyrimo dalyviai pagal patirtį buvo suskirstyti į dvi grupes: vienos grupės tiriamieji neturėjo jokios išankstinės laparoskopinių operacijų patirties (A grupė, n=16), o kitos grupės turėjo tik navigacijos laparoskopu patirties (B grupė, n=16). Visi dalyviai pertrejas pratybas su laparoskopiniu virtualiu simuliatoriumi LapSim® atliko trijų pagrindinių laparoskopinių užduočių („Instrumentų navigacija“, „Pjovimas“, „Kabučių uždėjimas“) devynis bandymus. Kiekvieną užsiėmimą atskira užduotis buvo kartojamatris kartus, o užsiėmimas vyko ne dažniau nei kartą per savaitę. Vertintas galutinis užduoties rezultatas. Laparoskopinių operacijų įgūdžiai vertinti kompiuterine sistema pagal išvestinį kaupiamąjį kiekvienos užduoties balą.RezultataiA grupės dalyviai buvo jaunesni (22,2±1,3 vs. 26,1±1,3 metų, p<0,001). Išanalizavus visų trijų užduočių kaupiamuosius balus po pirmųjų penkių bandymų, abi grupės skyrėsi statistiškai reikšmingai (p<0,001). Tyrimą tęsiant ir lyginant išvestinį kaupiamąjįbalą atliekant užduotį „Instrumentų navigacija“ po šešto bandymo (p=0,073), užduotį „Kabučių uždėjimas“ po septinto bandymo (p=0,287), užduotį „Pjovimas“ po aštunto bandymo (p = 0,080), jokių reikšmingų skirtumų tarp tiriamų grupių nerasta.IšvadosTyrimo rezultatai parodė, kad net be laparoskopinių operacijų patirties tokių operacijų pagrindinius įgūdžius laparoskopiniu simuliatoriumi įgyjama greičiau. Chirurginės simuliacijos užduočių kartojimas iki 6–8 bandymų leidžia įgyti gerus pagrindiniųlaparoskopinių operacijų įgūdžius. Šie rezultatai rodo, kad praktinių įgūdžių mokymas naudojant laparoskopinį simuliatorių turėtų būti įtrauktas į medicinos studijų programą.Reikšminiai žodžiai: chirurgijos studijos, simuliacija, laparoskopija, virtualios realybės simuliatorius, LapSim.


1962 ◽  
Vol 15 (4) ◽  
pp. 456-460
Author(s):  
R. S. Blicq

Recently I was asked to assist the engineers in my company (a Canadian electronics firm) devise a method for using radiation from the Sun to check the alignment of heavy ground radar sets to within very fine tolerances. The degree of accuracy would have to be better than five minutes of arc in azimuth for search antennas, and three minutes of arc in elevation angle for height finding antennas. Solar radiation in the microwave region of the radio frequency spectrum would be used as a reference. The antenna reflector would be rotated in azimuth and elevation until maximum solar radiation was reflected into the waveguide horn and thence to the radar receiver. The moment peak detector current was obtained, the antenna would be locked in position and the exact G.M.T. noted. Normal astro-navigation calculation methods and tables would then be used to calculate the Sun's true azimuth and elevation angle, which would be compared with that measured by the antenna to determine its accuracy.Since none of the engineers had previous navigation experience, they had run into difficulties when they tried to devise a method for calculating the Sun's position to within the requisite accuracy limits.The first difficulty was the fact that most antenna calibrations would be performed by field technicians having no knowledge of astro-navigation tables and calculation methods. They would be at extremely remote radar stations across Canada and thus would not have an opportunity to ask questions if our instructions proved ambiguous.


2019 ◽  
Vol 25 (3) ◽  
pp. 5 ◽  
Author(s):  
V. V. Zvyagintsev ◽  
V. P. Gorpinyuk ◽  
G. V. Fomov ◽  
A. S. Mukhin

2016 ◽  
Vol 24 (2) ◽  
pp. 582-590 ◽  
Author(s):  
Lace M. Padilla ◽  
Sarah H. Creem-Regehr ◽  
Jeanine K. Stefanucci ◽  
Elizabeth A. Cashdan

2015 ◽  
Vol 23 (4) ◽  
pp. 1-25 ◽  
Author(s):  
Tingru Cui ◽  
Xinwei Wang ◽  
Hock-Hai Teo

The internationalization of Web sites requires Web designers to provide effective navigation experience for users from diverse cultural backgrounds. This research investigates the effect of cultural cognitive style on user perception of Web site structure characteristics and performance on the Web site, and the subsequent user satisfaction towards the Web site. More specifically, the authors focus on the breadth versus depth of a Web site's structure. A laboratory experiment involving participants from China and the United States was conducted to test the hypotheses. The results showed that cultural cognitive style and Web site structure indeed interact to affect user perception and performance. People with holistic and analytic cultural cognitive styles displayed different perceived navigability and user performance on “broad” and “deep” Web sites. This study adds a cultural dimension to our knowledge on how Web site structure can affect users' experience. It also suggests pragmatic strategies for Web site design practitioners to improve website design in order to produce compelling navigation experience for users from diverse cultures.


Author(s):  
Ana Maria Soares ◽  
José Carlos M. R. Pinho ◽  
Teresa Heath ◽  
António Alves

This chapter focuses on the navigation experience in ecommerce. The authors address the impact of a number of hedonic dimensions, specifically perceived visual attractiveness, perceived enjoyment, and sociability, in consumers' online experiences. They develop and test a research model explaining how these factors affect trust, satisfaction, and ultimately, website loyalty. Findings from a survey carried out with 132 users of an airline's website, which displays a virtual customer service agent, support the model proposed. Specifically, results confirm that enriching consumers' sensory experiences online through aesthetics, an enjoyable experience, and a social interaction interface positively affects trust, satisfaction, and subsequently, loyalty.


2010 ◽  
Vol 17 (7) ◽  
pp. 332-336 ◽  
Author(s):  
E. J. Wamsley ◽  
M. A. Tucker ◽  
J. D. Payne ◽  
R. Stickgold

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