Articoli di riviste: "Stereography"

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Kazimi, A. "Hazardous Stereography". Journal of Vision 12, n. 14 (27 dicembre 2012): 2. http://dx.doi.org/10.1167/12.14.2.

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Wasim, Muhammad. "A Comparative Study of Curvature-Based and Differential Versions of Dotter Raster-stereography Techniques". KIET Journal of Computing and Information Sciences 1, n. 1 (14 aprile 2021): 01–12. http://dx.doi.org/10.51153/kjcis.v4i1.37.

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Conventional Line-based Raster-stereography has been a popular technique for 3-D surface topography. However, in its application for human face screening, the problem of line breaking was observed. In order to resolve this problem, there came up a new technique called dotted raster-stereography. The previously reported version of dotted raster-stereography extracted the curvature features of human face. This paper presents a modified version, viz. differential dotted raster-stereography in which instead of curvature, differences in straight line distances between adjacent points are calculated. A comparative picture of the two versions of dotted raster-stereography techniques is presented. Results suggest that this new differential version of dotted raster-stereography algorithm is faster in execution due to its simpler implementation in software, though lower in accuracy, as compared with the previously reported curvature-based version of dotted raster stereography.

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Helseth, Lars Egil, e Ingar Singstad. "Diffusers for holographic stereography". Optics Communications 193, n. 1-6 (giugno 2001): 81–86. http://dx.doi.org/10.1016/s0030-4018(01)01246-9.

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Davis, Melody D., e William C. Darrah. "An Essential Reprint in Stereography". Art Journal 57, n. 3 (1998): 94. http://dx.doi.org/10.2307/777979.

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Fowles, Jib. "Stereography and the Standardization of Vision". Journal of American Culture 17, n. 2 (giugno 1994): 89–93. http://dx.doi.org/10.1111/j.1542-734x.1994.00089.x.

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SHOJI, Tetsuya, Katsunori OKAYA, Katsuto GOTO e Shigeru OTSUKA. "Binocular scanning electron microscope for simultaneous stereography." Mineralogical Journal 13, n. 4 (1986): 195–201. http://dx.doi.org/10.2465/minerj.13.195.

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Toker, Leona. "Literary Stereography: Nabokov Drawing and Reading Maps". Partial Answers: Journal of Literature and the History of Ideas 19, n. 2 (2021): 361–69. http://dx.doi.org/10.1353/pan.2021.0020.

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Ito, Masaaki, Ken Hashimoto, Kaoru Katsuumi e Yoshio Sato. "Pathogenesis of Monilethrix: Computer Stereography and Electron Microscopy". Journal of Investigative Dermatology 95, n. 2 (agosto 1990): 186–94. http://dx.doi.org/10.1111/1523-1747.ep12477967.

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Pu, Yi-Ying, Jian-Wen Dong, Bing-Chu Chen, Yuan-Zhi Liu e He-Zhou Wang. "Three-dimensional imaging with monocular cues using holographic stereography". Optics Letters 35, n. 19 (28 settembre 2010): 3279. http://dx.doi.org/10.1364/ol.35.003279.

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Klinge, U., M. M�ller, C. Br�cker e V. Schumpelick. "Application of three-dimensional stereography to assess abdominal wall mobility". Hernia 2, n. 1 (marzo 1998): 11–14. http://dx.doi.org/10.1007/bf01207767.

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Imanishi, Nobuaki, Kazuo Kishi, Hak Chang, Hideo Nakajima e Sadakazu Aiso. "Three-dimensional venous anatomy of the dermis observed using stereography". Journal of Anatomy 212, n. 5 (maggio 2008): 669–73. http://dx.doi.org/10.1111/j.1469-7580.2008.00890.x.

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KAGA, YUJI. "DIGITAL DYNAMIC IMAGE : Present status and Problems of Rotato-stereography". Japanese Journal of Radiological Technology 48, n. 11 (1992): 2033–35. http://dx.doi.org/10.6009/jjrt.kj00003500352.

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Yücekul, Altuğ. "Complementary Imaging Method: Applicability of Raster-stereography and Validation by Radiography". Journal of Ankara University Faculty of Medicine 71, n. 1 (17 agosto 2021): 22–29. http://dx.doi.org/10.4274/atfm.galenos.2021.00821.

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SHOJI, Tetsuya. "Real-time Stereography of Crystal Structure by a Personal Computer System". Geological data processing 1987, n. 12 (1987): 1–25. http://dx.doi.org/10.6010/geoinformatics1975.1987.12_1.

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Eguchi, Youichi, Yuji Kaga, Ryuji Suzuki, Shigeo Kinai, Hiroshi Asahina, Hitoshi Fujita, Ichiro Ogura e Hiroshi Yasuhara. "354. Angiography with DVM : (IV) Study of Optimum Observation for Rotato-stereography". Japanese Journal of Radiological Technology 46, n. 8 (1990): 1325. http://dx.doi.org/10.6009/jjrt.kj00003322476.

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Goto, Kentaro, Fumihiko Matsui, Tomohiro Matsushita, Yukako Kato e Hiroshi Daimon. "Orbital Angular Momentum of Iron Valence Band Electron Deduced by Photoelectron Stereography". Journal of the Physical Society of Japan 77, n. 10 (15 ottobre 2008): 103301. http://dx.doi.org/10.1143/jpsj.77.103301.

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Chu Kun Kuo, P. "Stereography of growth of β″-Al2O3 single crystal films from sapphire substrates". Solid State Ionics 84, n. 1-2 (marzo 1996): 41–50. http://dx.doi.org/10.1016/s0167-2738(96)83004-9.

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Tabard, Anne, Alice Bonnefoy-Mazure, Pierre Lascombes, Stéphane Armand e Romain Dayer. "Validity and Reliability of Spine Raster-stereography in Adolescent Idiopathic Scoliosis Patients". Global Spine Journal 6, n. 1_suppl (aprile 2016): s—0036–1582740—s—0036–1582740. http://dx.doi.org/10.1055/s-0036-1582740.

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Hessels, Scott. "Lenticular Waterwheels: Simultaneous Kinetic and Embedded Animation". Leonardo 50, n. 4 (agosto 2017): 394–99. http://dx.doi.org/10.1162/leon_a_01457.

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After decades as a novelty, lenticular technology has resurfaced in compelling large-scale projects. Without any required energy, the medium offers stereography without glasses and frame animation without electronics. A kinetic artwork installed in a remote river in the French mountains broke from the technology’s previous restrictions of static and flat display, recalculated the print mathematics for a curved surface, and explored narrative structures for a moving image on a moving display. This paper documents how the sculpture used custom steel fabrication, site-specific energy, and revised lens calculation to present a previously unexplored hybrid of animation.

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Schulte, Tobias L., Eberhard Hierholzer, Andreas Boerke, Thomas Lerner, Ulf Liljenqvist, Viola Bullmann e Lars Hackenberg. "Raster Stereography Versus Radiography in the Long-term Follow-up of Idiopathic Scoliosis". Journal of Spinal Disorders & Techniques 21, n. 1 (febbraio 2008): 23–28. http://dx.doi.org/10.1097/bsd.0b013e318057529b.

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Kwiatkowski da Silva, Alisson, Osvaldo Mitsuyuki Cintho, Selauco Vurobi, Joéverton I. Pereira e José Deodoro Trani Capochi. "Effects of Multiple Pre-Sintering Heat Treatments and Consolidations Applied to Nicralc Alloys Processed by Mechanical Alloying". Materials Science Forum 805 (settembre 2014): 221–26. http://dx.doi.org/10.4028/www.scientific.net/msf.805.221.

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NiCrAlC alloys are economical alternatives nickel superalloys to Co family StellitesTMalloys, they are constituted by a dispersion of chromium carbides in a Ni3Al (γ’) intermetallic matrix. Mechanical Alloying (MA) allows better control of the carbides size and distribution in NiCrAlC matrix after sintering, although high porosity has been observed after uniaxial compaction and sintering of NiCrAlC alloys processed by MA. This research investigated the employment viability of pre-sintering heat-treatments followed by a new uniaxial compression in order to reduce porosity after final sintering. The characterization of the processed material by optical metallography and quantitative stereography appoints to the viability of this conception to reduce the porosity of NiCrAlC alloys processed by Mechanical Alloying.

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Thometz, John G., X. C. Liu, Roger Lyon e Gerald F. Harris. "Variability in Three-Dimensional Measurements of Back Contour with Raster Stereography in Normal Subjects". Journal of Pediatric Orthopaedics 20, n. 1 (gennaio 2000): 54. http://dx.doi.org/10.1097/01241398-200001000-00012.

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Colombo, Tommaso, Massimiliano Mangone, Francesco Agostini, Andrea Bernetti, Marco Paoloni, Valter Santilli e Laura Palagi. "Supervised and unsupervised learning to classify scoliosis and healthy subjects based on non-invasive rasterstereography analysis". PLOS ONE 16, n. 12 (23 dicembre 2021): e0261511. http://dx.doi.org/10.1371/journal.pone.0261511.

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The aim of our study was to classify scoliosis compared to to healthy patients using non-invasive surface acquisition via Video-raster-stereography, without prior knowledge of radiographic data. Data acquisitions were made using Rasterstereography; unsupervised learning was adopted for clustering and supervised learning was used for prediction model Support Vector Machine and Deep Network architectures were compared. A M-fold cross validation procedure was performed to evaluate the results. The accuracy and balanced accuracy of the best supervised model were close to 85%. Classification rates by class were measured using the confusion matrix, giving a low percentage of unclassified patients. Rasterstereography has turned out to be a good tool to distinguish subject with scoliosis from healthy patients limiting the exposure to unnecessary radiations.

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Wood, Peter, e Michael Dudding. ""Interior view of a hut ...": Stereography and the depiction of an Interior Architecture in 1930". Architectural History Aotearoa 18 (8 dicembre 2021): 74–87. http://dx.doi.org/10.26686/aha.v18i.7371.

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This paper is an exploration of a stereographic photograph taken inside a New Zealand backcountry hut. Matter-of-factly entitled, "Interior view of a hut, with mugs, a bottle, plate and cutlery on a table, looking through door to another hut, location unidentified," the photograph is attributed by the Alexander Turnbull Library to keen amateur photographer Edgar Richard Williams. The image gives little detail away in its depiction of the hut interior, except for a utilitarian table tableau that begins to suggest a nascent New Zealand interior defined by no-nonsense pragmaticism and Lea & Perrins. But, far from being a scene of Depression-era poverty and deprivation, close examination of the photographed situation and its broader context provides a glimpse into a monied amateurism that heralded an emergent leisure class. As a stereoscopic image, the photograph does more than depict a scene. By placing us within a spatial view, we become immersed in questions concerning interiority and exteriority. We are presented with two spatial contrasts: one in the subject of the image, the other in the object of the image. By taking a close reading of both contrasts, this paper is an attempt to make some architectural sense of these dualities.

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Chen, C. N., e W. C. Chang. "Optimal Rock Bolt Installation Design Based on 3D Rock Stress Distribution and Stereography Coupled Analysis". Journal of Mechanics 34, n. 6 (22 agosto 2017): 749–58. http://dx.doi.org/10.1017/jmech.2017.67.

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AbstractThe position determination for rock bolt support design based on rock stress distribution is important in ensuring full mobilization of rock bolt tensions during excavation process. The monitoring of the progressive rock stress variation in magnitude and orientation can play an important role in optimal installation of rock bolt. The aim of this paper is to determine the optimal positions for rock bolt installation by computing the progressive directional variation of rock stresses and plot the stress distribution in a two-dimensional stereographic projection to capture the stress transformation during excavation process. Finally, an algorithm based on stress transformation determination for optimal rock bolt installation is proposed.

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Dulina, Ľuboslav, Arkadiusz Gola, Martin Gašo, Blanka Horváthová, Eleonóra Bigošová, Miroslava Barbušová, Dariusz Plinta e Jiří Kyncl. "Influence of Various Types of Office Desk Chair for Dynamizing the Operation Assessed by Raster Stereography". Applied Sciences 11, n. 11 (26 maggio 2021): 4910. http://dx.doi.org/10.3390/app11114910.

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The current development trend of the operational activities indicates an increase in occupations which last for a few generations and whose primary position is the activity in the sitting position. This trend is directly connected with the technological progress and development of the society within Industry 4.0. However, the workplaces intended for sitting occupations that are designed according to the current standards are unsuitable from several perspectives. The long-term sitting activities at most actual workplaces cause an accumulation of the static load. For this reason, the article deals with dynamizing the activities in the sitting position. The presented research is based on utilizing the knowledge of the sitting posture dynamics and on the information acquired through diagnostics based on the Raster Stereography as an innovative method based on modelling a natural human spin. The article brings the first research results, which points out the fact that probably not all types of dynamic sitting that are nowadays preferred are suitable for long-term working.

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Gorshkov, Yu G., V. V. Vakhrushev, N. M. Mashrabov e A. M. Shestakov. "Application of the contactless stereography method for the identification and assessment of restored parts' defects size". Traktory i sel hozmashiny 79, n. 2 (15 febbraio 2012): 47–51. http://dx.doi.org/10.17816/0321-4443-69399.

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An approach to the estimation of defects after the reconstruction by thermal processing of steel and cast iron details for tractors and cars is declared. A method based on the application of optical-electronic means and computer technologies is offered. Estimation results and size of defects on the surface of details after restoration are brought. Features of construction and work of the optical device on the basis of advanced double MIS-11 microscope are considered.

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Schroeder, J., R. Reer e K. M. Braumann. "Video raster stereography back shape reconstruction: a reliability study for sagittal, frontal, and transversal plane parameters". European Spine Journal 24, n. 2 (26 novembre 2014): 262–69. http://dx.doi.org/10.1007/s00586-014-3664-5.

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Menegatti, Erica, Simona Mandini, Anselmo Pagani, Beatrice Mandini, Valentina Zerbini, Tommaso Piva, Andrea Raisi et al. "The Effect of Active Stretching Training in Patients with Chronic Venous Insufficiency Monitored by Raster-Stereography". Sensors 22, n. 21 (4 novembre 2022): 8509. http://dx.doi.org/10.3390/s22218509.

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(1) Background: Musculoskeletal disorders can be associated with advanced clinical stages of chronic venous insufficiency (CVI). The aim of the study is to investigate the effect of active stretching (AS) training on lower limb venous function and quality of life in patients affected by CVI. (2) Methods: A prospective two-armed pilot randomized controlled was conducted. Twenty (20) CVI patients were randomly assigned to an AS training or to a control group (C) who did not receive any exercise indication. At baseline and after three months all the participants were tested for leg volumetry (LV), air plethysmography (APG), and quality of life (QoL) measured by a disease specific validated questionnaire (VVSymQ), ankle range of motion (ROM), and postural deformities using an optoelectronic body posture machine. (3) Results: At the end of the training in the AS group a significant leg volume reduction was detected (from 2340 ± 239 mL to 2239 ± 237 mL (4.3%); p < 0.0001), whereas in the C group no significant volume changes were found. The ejection fraction rate (EF%) increased significantly from 49.3 ± 9.3 to 61.1 ± 14.5, p < 0.005. A moderate-strong linear correlation with EF% and ankle ROM variation was found (R2 = 0.6790; p < 0.0034). Several postural outcomes such as pelvic tilt, pelvic torsion, and lordotic angle significantly improved in the AS group (p < 0.01, p < 0.04, p < 0.01 respectively). (4) Conclusion: The AS training impacts on the APG parameters related to the musculoskeletal pump efficiency, opening a further possibility in the management of CVI patients by means of an appropriate adapted physical exercise program.

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Dehnavi, Sahar, Yasser Maghsoudi, Klemen Zakšek, Mohammad Javad Valadan Zoej, Gunther Seckmeyer e Vladimir Skripachev. "Cloud Detection Based on High Resolution Stereo Pairs of the Geostationary Meteosat Images". Remote Sensing 12, n. 3 (23 gennaio 2020): 371. http://dx.doi.org/10.3390/rs12030371.

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Due to the considerable impact of clouds on the energy balance in the atmosphere and on the earth surface, they are of great importance for various applications in meteorology or remote sensing. An important aspect of the cloud research studies is the detection of cloudy pixels from the processing of satellite images. In this research, we investigated a stereographic method on a new set of Meteosat images, namely the combination of the high resolution visible (HRV) channel of the Meteosat-8 Indian Ocean Data Coverage (IODC) as a stereo pair with the HRV channel of the Meteosat Second Generation (MSG) Meteosat-10 image at 0° E. In addition, an approach based on the outputs from stereo analysis was proposed to detect cloudy pixels. This approach is introduced with a 2D-scatterplot based on the parallax value and the minimum intersection distance. The mentioned scatterplot was applied to determine/detect cloudy pixels in various image subsets with different amounts of cloud cover. Apart from the general advantage of the applied stereography method, which only depends on geometric relationships, the cloud detection results are also improved because: (1) The stereo pair is the HRV bands of the Spinning Enhanced Visible and InfraRed Imager (SEVIRI) sensor, with the highest spatial resolution available from the Meteosat geostationary platform; and (2) the time difference between the image pairs is nearly 5 s, which improves the matching results and also decreases the effect of cloud movements. In order to prove this improvement, the results of this stereo-based approach were compared with three different reflectance-based target detection techniques, including the adaptive coherent estimator (ACE), constrained energy minimization (CEM), and matched filter (MF). The comparison of the receiver operating characteristics (ROC) detection curves and the area under these curves (AUC) showed better detection results with the proposed method. The AUC value was 0.79, 0.90, 0.90, and 0.93 respectively for ACE, CEM, MF, and the proposed stereo-based detection approach. The results of this research shall enable a more realistic modelling of down-welling solar irradiance in the future.

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Kikuchi, Yoshihito, e Takahiro Yamanoi. "Perspective Sensory Measurement Method Using Multi Viewpoint 3D Glass-Free Display". International Journal of Automation Technology 5, n. 2 (5 marzo 2011): 218–22. http://dx.doi.org/10.20965/ijat.2011.p0218.

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Recent investigations demonstrate that perspective sensory loss correlates with early Alzheimer Disease (AD).Our previous studymeasured this through stereopsis. Based on cross-eyed stereography, a computer generates images at a given distance from a monitor. Sensory perspective is measured as the difference between a subject’s sense and a given distance. Experiments conducted for non-AD and AD subjects showed different, statistically significant results. The measurement we propose for sensory perspective without the use of 3D glasses eliminates the need for LCD shutter glasses and provides much more natural viewing. We measured sensory perspective within modeling space and 3 virtual objects - 2 fixed at a given location horizontally and 1 centered between the other 2 objects and moved from infinity to the nearest point. The subject moves the center object to line it up with the 2 fixed objects. We report results of preliminary experiments on measuring sensory perspective. Subjects included non-AD and AD cases.

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Cho, Tae Won, Dong-Seong Sohn e Yeon Soo Kim. "Thermal conductivity of U–Mo/Al dispersion fuel: effects of particle shape and size, stereography, and heat generation". Journal of Nuclear Science and Technology 52, n. 10 (10 aprile 2015): 1328–37. http://dx.doi.org/10.1080/00223131.2015.1021285.

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Cahyaningsih, Catur, Puja Fransismik Crensonni, Yogi Aditia, Adi Suryadi, Yuniarti Yuskar, Tiggi Choanji e Dewandra Bagus Eka Putra. "Petrography, Geology Structure and Landslide Characterization of Sumatra Fault Deformation: Study Case In Km 10-15 Highway, Koto Baru Sub District, West of Sumatra". Journal of Geoscience, Engineering, Environment, and Technology 3, n. 4 (1 dicembre 2018): 192. http://dx.doi.org/10.24273/jgeet.2018.3.4.2062.

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Research area is around Tanjung Balik, Koto Baru Sub Base, Lima Puluh Kota District, West Sumatra Province. Located along the highway Km 10-15 Riau – West Sumatra and the coordinate around 00˚08'40 '' LU - 0˚11'20 '' N and 100˚45'20 '' BT - 100˚47'00 '' BT. The purpose of research to identify petrography, microstructure, types of landslides and the geological condition. The methods using polarization microscope, stereography, landslide identification survey and geological mapping. The result of study shows the petrography analysis of lithology of study area are classified into three types of rocks are Feldspathic Greywacke, Lithic Arenite, and Slate. Microstructures trending system show the foliation structure that is relatively Southeast-Northwest. Types of landslide which dominates in the research area are debris avalanche and translational landslide. Geological analysis show some of rock units are classified into two units: Sandstone Unit and Slate Unit. Sandstone Unit spread in the northern part of the study area, while Slate Unit spread in the southern part of the study area. The characteristics of these rocks showed Pematang Formation.

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Knafo, J., T. Thelen, D. Verdier, L. Creppy, C. Tournier e T. Fabre. "Reproducibility of low-dose stereography measurements of femoral torsion after IM nailing of femoral shaft fractures and in intact femurs". Orthopaedics & Traumatology: Surgery & Research 102, n. 5 (settembre 2016): 595–99. http://dx.doi.org/10.1016/j.otsr.2016.03.020.

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Brandl, Andreas, Christoph Egner e Robert Schleip. "Immediate Effects of Myofascial Release on the Thoracolumbar Fascia and Osteopathic Treatment for Acute Low Back Pain on Spine Shape Parameters: A Randomized, Placebo-Controlled Trial". Life 11, n. 8 (18 agosto 2021): 845. http://dx.doi.org/10.3390/life11080845.

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Background: Spine shape parameters, such as leg length and kyphotic or lordotic angle, are influenced by low back pain. There is also evidence that the thoracolumbar fascia plays a role in such pathologies. This study examined the immediate effects of a myofascial release (MFR) technique on the thoracolumbar fascia and of an osteopathic treatment (OMT) on postural parameters in patients with acute low back pain (aLBP). Methods: This study was a single-blind randomized placebo-controlled trial. Seventy-one subjects (43.8 ± 10.5 years) suffering from aLBP were randomly and blindedly assigned to three groups to be treated with MFR, OMT, or a placebo intervention. Spinal shape parameters (functional leg length discrepancy (fLLD), kyphotic angle, and lordotic angle) were measured before and after the intervention using video raster stereography. Results: Within the MFR group, fLLD reduced by 5.2 mm, p < 0.001 and kyphotic angle by 8.2 degrees, p < 0.001. Within the OMT group, fLLD reduced by 4.5 mm, p < 0.001, and kyphotic angle by 8.4°, p = 0.007. Conclusion: MFR and OMT have an influence on fLLD and the kyphotic angle in aLBP patients. The interventions could have a regulating effect on the impaired neuromotor control of the lumbar muscles.

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Atabo, Shaibu Mohammed, Abubakar Abubakar Umar, Sani Abdullahi Shehu e Adamu Abdul Abubakar. "Embryonic Development and Comparative Anatomy of the Mandible". SciMedicine Journal 3, n. 1 (1 marzo 2021): 16–22. http://dx.doi.org/10.28991/scimedj-2021-0301-3.

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Objective: This study was designed to determine the ossification time and pattern of the mandible. Methodology: Three hundred and fifty (350) wasted fetuses consisting of 70 Balami, 140 each of Uda and Yankasa breeds whose crown vertebral rump length ranged from 3.0-15 cm were used. The fetuses were processed using the Alizarin technique and the mandible was dissected from the head for stereography. Result: The result revealed that the first part of the mandible to develop was the body and mental foramina at the 42nd–44th days of gestation while the coronoid process, rami, and condyloid process develop later at different time points. In addition, the mandibular foramina remained undeveloped in all age groups. Interestingly, the mandibular canal began ossification earlier in the Yankasa breed compared to other breeds. It was shown to arise from a cartilaginous tissue at the medial and lateral surfaces of the body and dorsally remained opened and undifferentiated from the teeth alveoli of the lower jaws in the 7 age groups. Conclusion: It was therefore concluded that the mandible arises from three ossification centres at the body, rami, and coronoid process. These segments develop at different time intervals in the three breeds of sheep with Yankasa mandible ossifying and progressing faster than in Balami and Uda. Doi: 10.28991/SciMedJ-2021-0301-3 Full Text: PDF

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Shitoev, I. D., S. V. Muravev, Yu V. Karakulova, V. I. Pecherskiy, V. N. Nikitin e G. Z. Kloyan. "Evolution of optical diagnosis of spinal deformity. Methods and future development (literature review)". Genij Ortopedii 28, n. 5 (ottobre 2022): 734–44. http://dx.doi.org/10.18019/1028-4427-2022-28-5-734-744.

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Introduction Diagnosis of spinal deformities in children and adolescents is important for continuous development of modern traumatology and orthopaedics. Methods of optical diagnosis of scoliosis and postural disorders have been rapidly improving along with optical and digital assessment technologies over the past centuries and required a structural analysis of the accumulated data. The purpose was to explore clinical and technical aspects of optical diagnosis of spinal deformities. Material and methods The original literature search was conducted on key resources including the National Library of Medicine (PubMed) and Scientific Electronic eLibrary. The search depth was 10 years. Results The article presents a review of the methods historically developed in optical diagnosis of spinal deformities. Major methods and systems of optical diagnosis presented included moire topography, the ISIS system, modern methods of computer optical topography (raster stereography) photogrammetric methods used in clinical medicine and in trauma and orthopaedics. Characteristics of the methods and systems are described with advantages and disadvantages discussed. The article reports evaluated accuracy, reliability and reproducibility of optical diagnostic methods. The article presents the latest information about the possibilities of introducing technology for assessing spinal deformity using modern personal telecommunication devices. Conclusion The evolution of modern trends in optical diagnosis of spinal deformity is important for medicine to facilitate safety, greater accuracy, ease of operation, digitalization and development of the Internet of Medical Things.

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Park, Sihwa, Sunhee Park, Sukyung Min, Chang-Ju Kim e Yong-Seok Jee. "A Randomized Controlled Trial Investigating the Effects of Equine Simulator Riding on Low Back Pain, Morphological Changes, and Trunk Musculature in Elderly Women". Medicina 56, n. 11 (13 novembre 2020): 610. http://dx.doi.org/10.3390/medicina56110610.

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Background and objectives: Studies on the effects of an equine riding simulator (ERS) program on back pain, spinal alignment, and isokinetic moments in subjects with chronic low back pain (CLBP) remain limited. The purpose of this study was to analyze changes in elderly women with CLBP who participate in an ERS program. Materials and Methods: The 80 participants were all women aged 61–84 years who were randomly assigned to either the control group (CON) or ERS group (ERSG). ERS exercise was performed for a duration of 12 weeks (three times each week). The degree of pain was measured using the Oswestry Disability Index and the visual analog scale. Body composition and spinal alignment were measured using bioelectrical impedance and raster stereography. The isokinetic moments of trunk extensor and flexor were measured before and after the training period. Results: The ERSG showed a significant decrease in back pain compared to the CON. There was a significant decrease in levels of fat in the ERSG, although no differences were shown in terms of muscle mass. However, there was an increased basal metabolic rate (BMR) in the ERSG. Spinal alignment in the ERSG significantly improved. The peak torques of the trunk extensor in the ERSG were also significantly increased. Conclusion: It can be inferred that the ERS exercise can decrease fat and improve the trunk extensor strength through increased BMR, leading to better spinal alignment and reducing back pain in elderly women with CLBP.

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Rankine, Leah, Xue C. Liu, Channing Tassone, Roger Lyon, Sergey Tarima e John Thometz. "Reproducibility of Newly Developed Spinal Topography Measurements for Scoliosis". Open Orthopaedics Journal 6, n. 1 (15 giugno 2012): 226–30. http://dx.doi.org/10.2174/1874325001206010226.

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Objective: In an effort to limit exposure to ionizing radiation and fully characterize three dimensional changes in the spine of patients with scoliosis reliable non-invasive methods of spinal back contour analysis (Milwaukee Topographic Scanner) (MTS) have been developed. Study Design: The current study compares spinal topography measurements among different subject positions and evaluates the reproducibility of the system for both inter-rater and intra-rater reliability. Methods: A dummy cast (plastic cast) of one patient with adolescent idiopathic scoliosis was created in order to test the reliability of the MTS. The dummy cast was positioned and rotated in 3D while scanned by two investigators using the MTS. A total of twelve parameters including Q-angle (an analog to X-ray’s Cobb angle) were extracted. Results: All measurements of intra-rater and inter-rater reliability were excellent (Intraclass Correlation Coefficients ranging from 0.89 to 0.99) with the exception of Pelvic Tilt (intra-rater ICC is 0.61) and lordosis angle (inter-rater ICC is 0.82). No significant variability among investigators was observed for all tested metrics. No significant variability due to position was observed for the majority of back contour measurements but there were significant changes in the T1-S1 angle, T1-S1 deviation, T1-NC angle, T1-NC deviation, and Back Height metric (p< 0.05). Conclusions: The MTS is a reliable method of raster stereography in the measurement of the back contour, which will help monitor the progression of children with idiopathic scoliosis and reduce the use of X-rays.

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Colligan, Colette. "Stereograph". Victorian Review 34, n. 1 (2008): 75–82. http://dx.doi.org/10.1353/vcr.2008.0006.

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Harper, Bernard, e Richard Latto. "Cyclopean Vision, Size Estimation, and Presence in Orthostereoscopic Images". Presence: Teleoperators and Virtual Environments 10, n. 3 (giugno 2001): 312–30. http://dx.doi.org/10.1162/105474601300343630.

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Stereo scene capture and generation is an important facet of presence research in that stereoscopic images have been linked to naturalness as a component of reported presence. Three-dimensional images can be captured and presented in many ways, but it is rare that the most simple and “natural” method is used: full orthostereoscopic image capture and projection. This technique mimics as closely as possible the geometry of the human visual system and uses convergent axis stereography with the cameras separated by the human interocular distance. It simulates human viewing angles, magnification, and convergences so that the point of zero disparity in the captured scene is reproduced without disparity in the display. In a series of experiments, we have used this technique to investigate body image distortion in photographic images. Three psychophysical experiments compared size, weight, or shape estimations (perceived waist-hip ratio) in 2-D and 3-D images for the human form and real or virtual abstract shapes. In all cases, there was a relative slimming effect of binocular disparity. A well-known photographic distortion is the perspective flattening effect of telephoto lenses. A fourth psychophysical experiment using photographic portraits taken at different distances found a fattening effect with telephoto lenses and a slimming effect with wide-angle lenses. We conclude that, where possible, photographic inputs to the visual system should allow it to generate the cyclopean point of view by which we normally see the world. This is best achieved by viewing images made with full orthostereoscopic capture and display geometry. The technique can result in more-accurate estimations of object shape or size and control of ocular suppression. These are assets that have particular utility in the generation of realistic virtual environments.

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Smith, Graham. "Italian Stereographs". History of Photography 25, n. 1 (marzo 2001): 115–16. http://dx.doi.org/10.1080/03087298.2001.10443445.

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Wilczyński, Jacek, Anita Sowińska e Marta Mierzwa-Molenda. "Physiotherapy as a Specific and Purposeful Form of Physical Activity in Children with Idiopathic Body Asymmetry". International Journal of Environmental Research and Public Health 19, n. 22 (15 novembre 2022): 15008. http://dx.doi.org/10.3390/ijerph192215008.

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The aim of the study was to determine the relationship between idiopathic asymmetry in infants and body posture in children at an early school age. The study included 45 girls aged nine. The Diers Formetric III 4D device was used to assess body posture, which allows photogrammetric registration of the back surface using the raster stereography process. For the purposes of the re-search project, the examination was performed via DiCAM using the “Average measurement” mode. Despite physiotherapy, these children had more postural defects later on compared to the control group due to asymmetry. They mainly concerned pelvic skewness, scoliosis angle, deviation from the vertical line and lateral deviation, as well as surface rotation. Positive correlations were observed between direction of asymmetry and pelvic skewness (r = 0.40), and between the location of asymmetry and the location of curvature (r = 0.39). Significant negative correlations were also found between the age of treatment initiation and trunk length (r = −0.42). There was also a negative correlation between the number of physiotherapeutic appointments and deviation from the vertical line, which means that along with an increase in the number of physiotherapeutic visits, the value of deviation from the vertical line decreased (p = −0.40). For scoliosis angle, the most important predictor was the direction of asymmetry (p = 0.05). For the location of the curvature, the most important predictor was the direction of asymmetry (p = 0.04), as well as the number of physiotherapeutic appointments (p = 0.04). Additionally, regression analysis allowed us to show that the number of physiotherapeutic visits (p = 0.03) was the most important predictor of curvature direction. The applied physiotherapy probably contributed to the occurrence of a smaller number of postural defects in these children at a later age. Physiotherapy as a specific and targeted form of physical activity among infants with idiopathic asymmetry should play a very important role in the prevention of body posture defects.

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Raiford, Leigh. "Marcus Garvey in Stereograph". Small Axe: A Caribbean Journal of Criticism 17, n. 1 (1 marzo 2013): 263–80. http://dx.doi.org/10.1215/07990537-1665479.

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Ch, V. Sastry. "Marshall-Olkin Stereographic Circular Logistic Distribution". YMER Digital 21, n. 06 (22 giugno 2022): 664–68. http://dx.doi.org/10.37896/ymer21.06/66.

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Marshall and Olkin (1997) proposed an interesting method of adding a new parameter to the existing distributions. The resulting distributions are called the MarshallOlkin distributions, these distributions include the original distributions as a special case and are more flexible and represent a wide range of behavior than the original distributions. In this paper, a new class of asymmetric stereographic circular logistic distribution is introduced by using Marshall-Olkin transformation on stereographic circular logistic distribution (Dattatreyarao et al (2016)), named as Marshall-Olkin Stereographic Circular Logistic Distribution. The proposed model admits closed form density and distribution functions, generalizes the stereographic circular logistic model and is more flexible to model various types of data (symmetric and skew-symmetric circular data). Keywords:Characteristics, Stereographic circular logistic distribution, circular data, Marshall-Olkin transformation, l -axial data.

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Girija, S. V. S., A. V. Dattatreya Rao e Phani Yedlapalli. "New Circular model induced by Inverse Stereographic projection on Double Exponential Model - Application to Birds Migration Data". Journal of Applied Mathematics, Statistics and Informatics 10, n. 1 (15 luglio 2014): 5–17. http://dx.doi.org/10.2478/jamsi-2014-0001.

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Abstract This paper introduces Stereographic Double Exponential Model based on inverse Stereographic Projection or Bilinear (Mobius) Transformation, [Minh and Farnum (2003)]. onsidering the data set of 13 homing pigeons were released singly in the Toggenburg Valley in Switzerland under sub Alpine conditions (data quoted in Batschelet (1981)), it is shown that the said model is a good fit by most of the tests at various level of significance. The derivation of the characteristic function for Stereographic Double Exponential Model and its trigonometric moments are presented. Relative performance of Stereographic Logistic [Phani (2013], Wrapped Logistic [Dattatreya Rao et al (2007)] and Stereographic Double Exponential models for the live data of 13 birds is studied. Also graphs of pdf of this new Model for various combinations of the parameters are drawn.

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Kosel, T. H. "Microcomputerized stereographic projection". Proceedings, annual meeting, Electron Microscopy Society of America 46 (1988): 914–15. http://dx.doi.org/10.1017/s0424820100106636.

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Stereographic projection is a well-known and frequently used technique for representing crystal orientations and solving crystallographic problems. Graphical techniques for preparation of stereo projections on paper are especially time-consuming for non-cubic crystals since the angles between planes and/or directions must be calculated and depend on crystal lattice parameters. A computer program has therefore been developed which permits the construction and manipulation, in a matter of seconds, of projections of any crystal structure in any orientation. The program has applications both in research and in teaching, and runs on the Macintosh™ series of microcomputers. The purpose of this paper is simply to briefly describe the capabilities of the program for the interest of electron microscopists.Johari and Thomas described a computer program which generated stereo projections of any crystal system. Since great circles, small circles and rotation of a pole or the crystal are commonly used in stereo projection problems, Kosel developed the mathematical basis for more complete computer algorithms which could perform virtually any basic operation normally done on paper.

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Kosel, T. H. "Microcomputer Stereographic Projection". JOM 37, n. 10 (ottobre 1985): 56–57. http://dx.doi.org/10.1007/bf03258772.

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Michael Hardy. "Stereographic Trigonometric Identities". American Mathematical Monthly 122, n. 1 (2015): 43. http://dx.doi.org/10.4169/amer.math.monthly.122.01.43.

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Liu, Hongwei, e Jiangwen Liu. "SP2: a computer program for plotting stereographic projection and exploring crystallographic orientation relationships". Journal of Applied Crystallography 45, n. 1 (13 dicembre 2011): 130–34. http://dx.doi.org/10.1107/s0021889811049582.

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Stereographic projection is one of the most powerful research tools for crystallography in materials science. A new program for full operation of stereographic projections and in-depth exploration of crystallographic orientation relationships is described. It is specifically designed for materials researchers who are in need of tools for extensive crystallographic analysis. The difference from other popular commercial software for crystallography is that this program provides new options for users to plot and fully control stereographic projections of an arbitrary pole centre for an arbitrary crystal structure and to illustrate composite stereographic projections, which are necessary to explore the orientation relationships between two phases. The program is able to perform a range of essential crystallographic calculations.

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