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Articles de revues sur le sujet « DIFFERENT ANGLES »

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Auteur : Grafiati

Publié le 11 septembre 2023

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1

Uversky, Vladimir N. « Biomolecules from Different Angles ». Biomolecules 11, n^o 1 (26 décembre 2020) : 14. http://dx.doi.org/10.3390/biom11010014.

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Special Issue “2019 Feature Papers by Biomolecules’ Editorial Board Members” represents a set of papers based on the results of the research in the laboratories of the Editorial Board Members (EBMs) of Biomolecules focused (a big surprise!) on different aspects of biomolecules [...]

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2

Schell, Thomas, Giuseppe Testa, Stefania Castagnetti, Berthold Rutz, Michi Hannus et Freddy Frischknecht. « Neuroscience from different angles ». EMBO reports 2, n^o 6 (juin 2001) : 471–75. http://dx.doi.org/10.1093/embo-reports/kve112.

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Cherevatskyi, Danilo. « Smart industry in different angles ». Economy of Industry 79, n^o 3 (1 novembre 2017) : 145–54. http://dx.doi.org/10.15407/econindustry2017.03.145.

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van Bouwelen, F. M. « Diamond polishing from different angles ». Diamond and Related Materials 9, n^o 3-6 (avril 2000) : 925–28. http://dx.doi.org/10.1016/s0925-9635(00)00220-x.

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Briley, M., A. Kato et M. Weber. « Alzheimer's disease from different angles ». Trends in Pharmacological Sciences 7 (janvier 1986) : 47–48. http://dx.doi.org/10.1016/0165-6147(86)90247-6.

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Iona, Mario, et Philip Best. « Different Angles on Errors in Textbooks ». Physics Today 46, n^o 4 (avril 1993) : 90–91. http://dx.doi.org/10.1063/1.2808889.

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7

Halualani, Rona Tamiko. « Different Angles, New Insights, Important Questions ». Journal of International and Intercultural Communication 7, n^o 2 (3 avril 2014) : 101–2. http://dx.doi.org/10.1080/17513057.2014.898555.

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Trewhella, Jill. « The different views from small angles ». Proceedings of the National Academy of Sciences 105, n^o 13 (24 mars 2008) : 4967–68. http://dx.doi.org/10.1073/pnas.0801324105.

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Sheikh Jabbari, M. M. « Classification of different branes at angles ». Physics Letters B 420, n^o 3-4 (février 1998) : 279–84. http://dx.doi.org/10.1016/s0370-2693(97)01550-5.

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Ciccarelli, Francesca D., et James DeGregori. « Approaching Cancer Evolution from Different Angles ». iScience 23, n^o 11 (novembre 2020) : 101661. http://dx.doi.org/10.1016/j.isci.2020.101661.

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Blazar, Bruce, Eric S. White et Daniel Couriel. « Understanding Chronic GVHD from Different Angles ». Biology of Blood and Marrow Transplantation 18, n^o 1 (janvier 2012) : S184—S188. http://dx.doi.org/10.1016/j.bbmt.2011.10.025.

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Ellis, David S., et Birdwell Finlayson. « ESWL : A look from different angles ». Urology 29, n^o 3 (mars 1987) : 247–49. http://dx.doi.org/10.1016/0090-4295(87)90062-8.

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Jia, Junsong, Weimin Wang, Yongle Wu, Yuan'an Liu, Yuqin Yang, Hui Li et Hua Xu. « TERAHERTZ CHANNEL MEASUREMENTS FOR DIFFERENT ANGLES AND DIFFERENT OBSTACLES ». Progress In Electromagnetics Research M 113 (2022) : 187–98. http://dx.doi.org/10.2528/pierm22060301.

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Peng, Zhang, Yuan, Li, Xie, Yang et Bai. « Energy Dissipation in Stepped Spillways with Different Horizontal Face Angles ». Energies 12, n^o 23 (23 novembre 2019) : 4469. http://dx.doi.org/10.3390/en12234469.

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Energy dissipation is one of the most important factors in choosing stepped spillways. However, very few studies have investigated energy dissipation with different horizontal face angles. In this paper, the realizable k-ε turbulent model was used to study the flow field, energy dissipation rates and turbulent kinetic energy and its dissipation rate for different stepped spillways with five horizontal face angles in the skimming flow regions. Results showed that the field and direction of the flow were changed by the horizontal face angles of the stepped spillway, which produced some unique characteristics and thus caused better energy dissipation. The fluctuation of free water surface will be larger with increasing horizontal face angles and the energy dissipation rate decreases with an increasing unit discharge and increases for the enlargement of the horizontal face angles. This conclusion could provide a reference for the relevant research of V shaped stepped spillways.

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Salvoldi, Manuel, Yaniv Tubul, Arnon Karnieli et Ittai Herrmann. « VENµS-Derived NDVI and REIP at Different View Azimuth Angles ». Remote Sensing 14, n^o 1 (1 janvier 2022) : 184. http://dx.doi.org/10.3390/rs14010184.

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The bidirectional reflectance distribution function (BRDF) is crucial in determining the quantity of reflected light on the earth’s surface as a function of solar and view angles (i.e., azimuth and zenith angles). The Vegetation and ENvironment monitoring Micro-Satellite (VENµS) provides a unique opportunity to acquire data from the same site, with the same sensor, with almost constant solar and view zenith angles from two (or more) view azimuth angles. The present study was aimed at exploring the view angles’ effect on the stability of the values of albedo and of two vegetation indices (VIs): the normalized difference vegetation index (NDVI) and the red-edge inflection point (REIP). These products were calculated over three polygons representing urban and cultivated areas in April, June, and September 2018, under a minimal time difference of less than two minutes. Arithmetic differences of VIs and a change vector analysis (CVA) were performed. The results show that in urban areas, there was no difference between the VIs, whereas in the well-developed field crop canopy, the REIP was less affected by the view azimuth angle than the NDVI. Results suggest that REIP is a more appropriate index than NDVI for field crop studies and monitoring. This conclusion can be applied in a constellation of satellites that monitor ground features simultaneously but from different view azimuth angles.

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Cao, Yi, S. R. Kulkarni, Avishay Gal-Yam, S. Papadogiannakis, P. E. Nugent, Frank J. Masci et Brian D. Bue. « SN2002es-LIKE SUPERNOVAE FROM DIFFERENT VIEWING ANGLES ». Astrophysical Journal 832, n^o 1 (18 novembre 2016) : 86. http://dx.doi.org/10.3847/0004-637x/832/1/86.

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O'Leary, Daniel J., Leslie Pieratos et Sydney Ka Lai Poon. « Cylinder axis sensitivity with different chevron angles ». Clinical and Experimental Optometry 69, n^o 4 (juin 1986) : 153–55. http://dx.doi.org/10.1111/j.1444-0938.1986.tb04580.x.

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18

Lockhart, Jennifer. « Exploring Maize Leaf Architecture from Different Angles ». Plant Cell 29, n^o 7 (juillet 2017) : 1550–51. http://dx.doi.org/10.1105/tpc.17.00541.

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19

Karshenboim, S. G. « Fundamental physical constants : looking from different angles ». Canadian Journal of Physics 83, n^o 8 (1 août 2005) : 767–811. http://dx.doi.org/10.1139/p05-047.

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We consider fundamental physical constants that are among a few of the most important pieces of information we have learned about Nature after intensive centuries-long study. We discuss their multifunctional role in modern physics including problems related to the art of measurement, natural and practical units, the origin of the constants, their possible calculability and variability, etc.PACS Nos.: 06.02.Jr, 06.02.Fn

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20

Inui, Hiroaki, Hiroshi Tanaka et Katsuya Nobuhara. « Glenohumeral relationships at different angles of abduction ». Surgical and Radiologic Anatomy 36, n^o 10 (27 mai 2014) : 1009–14. http://dx.doi.org/10.1007/s00276-014-1315-5.

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21

Han, Shuang, Runhua Yang, Chaobo Li et Lixin Yang. « The Wettability and Numerical Model of Different Silicon Microstructural Surfaces ». Applied Sciences 9, n^o 3 (8 février 2019) : 566. http://dx.doi.org/10.3390/app9030566.

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Wettability is an important property of solid surfaces and is widely used in many industries. In this work, seven silicon microstructure surfaces were made by plasma immersion ion implantation (PIII) technology. The experimental contact angles and theoretical contact angles of various surfaces were compared, which indicated that the classical theory had great limitations in predicting the static contact angles of complex structures. A parameterized microstructure surface was established by computational fluid dynamics (CFD) with a volume-of-fluid (VOF) model to analyze the reasons for the differences between experimental and theoretical contact angles. Comparing the results of experiments and simulations, it was found that the VOF model can simulate the contact angle of these surfaces very well. The geometrical models of the different microstructures were simplified, and waveforms of the surfaces were obtained.

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Patel, Kunal Patel, Kartik Parikh, Varun Pratap Singh et Jay Soni. « Identification of an Alternate Maxillary Apical Base Landmark from Pre-existing Substitution given by Different Authors ». Orthodontic Journal of Nepal 4, n^o 1 (24 octobre 2014) : 36–40. http://dx.doi.org/10.3126/ojn.v4i1.11309.

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Introduction: It is often difficult to locate Point A in a lateral cephalogram due to operational errors. Faulty identification of PointA can lead to erroneous measurement and faulty diagnosis.Objective: To identify nearest alternative maxillary apical base landmark for Point A substitutions given by different authors.Materials & Method: A cross sectional study was conducted on thirty good quality lateral cephalograms, which were appraisedfor skeletal Class I with the help of parameters angle ANB, WITS appraisal and Beta angle. Only those lateral cephalogramswere selected where Point A was easily identified. Landmarks: Sella (S), Nasion (N), Point A and three substitution points Y, L, Xwere traced. Angles formed by SN with Point A (Angle SNA) and three substitution points (Angle SNY, SNX, SNL) were measured.Correlation of angle SNA with angles SNY, SNX and SNL were derived.Result: A mean value of 82.8o ±1.9o, 83.1o ±1.8o, 78.3o ±2.9o and 78.7o ±2.7o for Angle’s SNA, SNY, SNL and SNX respectivelywas observed. A statistically significant correlation was observed between angles SNA and SNY, SNL, SNX; and strong positivecorrelation was observed with angle SNY.Conclusion: Point Y is the most nearing maxillary apical base landmark to Point A. Hence maxillary apical base landmark canbe substituted by Point Y where identification of point A is not obvious.

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23

Yin, Yan Guo, et Ting Xie. « Erosion Mechanisms of Hydraulic Concretes under High-Speed Abrasive Water Jets at Different Impact Angles ». Advanced Materials Research 150-151 (octobre 2010) : 680–86. http://dx.doi.org/10.4028/www.scientific.net/amr.150-151.680.

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The erosion behaviors of a hydraulic concrete under high-speed abrasive waterjets at different impact angles were investigated in this paper. The worn surfaces were observed by a scanning electron microscope (SEM). It was found that the defects in the matrix are often the nucleation sites of the microcracks during the erosion. The erosion mechanisms of hydraulic concrete at different impact angles were discussed. The results showed that the erosion process is mainly the microcutting at small impact angles, but peeling off at large impact angles, or mixed mechanism, i. e. microcutting and peeling, at medium impact angles.

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24

Duz, Hasan, et Serkan Yildiz. « Numerical Performance Analyses of Different Airfoils for Use in Wind Turbines ». International Journal of Renewable Energy Development 7, n^o 2 (10 juillet 2018) : 151–57. http://dx.doi.org/10.14710/ijred.7.2.151-157.

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This study numerically investigated different types of high-performance airfoils in order to increase the efficiency of wind turbines. Performances of five airfoil types were numerically simulated at different attack angles (0 ° <α <20 °) and at different wind speeds (4, 8, 16 and 32 m/s). Numerical analysis shows that all airfoils achieve the highest performance at attack angles between 4o and 7o. Results also show that the performance of all airfoils increases in direct proportion to increase in wind speed with a low gradient. A new hybrid airfoil was generated by combining lower and upper surface coordinates of two high-performance airfoils which achieved the better results in pressure distribution. Numerical analysis shows that the hybrid airfoil profile performs up to 6% better than other profiles at attack angles between 4o and 7o while it follows the maximum performance curves closely at other attack anglesArticle History: Received January 16th 2018; Received in revised form June 5th 2018; Accepted June 15th 2018; Available onlineHow to Cite This Article: Duz, H and Yildiz, S. (2018) Numerical Performance Analyses of Different Airfoils for Use in Wind Turbines. Int. Journal of Renewable Energy Development, 7(2), 151-157.https://doi.org/10.14710/ijred.7.2.151-157

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Kumar, P., et JK Prasad. « Side force over slender body with rings at different location at subsonic speed ». Proceedings of the Institution of Mechanical Engineers, Part G : Journal of Aerospace Engineering 231, n^o 8 (14 juin 2016) : 1478–91. http://dx.doi.org/10.1177/0954410016654180.

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Investigations have been made adopting experiments and computations on an ogive-nosed slender body at different angles of attack and Reynolds number of 29,000 based on the model base diameter diameter. The results indicated an increase in the side force at large angles of attack, which is mainly due to the presence of asymmetric vortices in the leeward of the body. The inclusion of a rectangular cross-sectioned ring in the initial portion of the body reduced the side force at higher angles of attack. However, significant side force was experienced at lower angles of attack (30° < α < 40°). Use of a ring of 3% height was found to be suitable for reducing the side force at a higher angle of attack. From the results obtained it was observed that a ring if placed at a different axial location alters the flow field and changes the side force at higher angles of attack. Further studies indicated that placing of rings pair at an axial location of 3.5 and 4.5 times the base diameter reduced the side force to a very low value at all the angles of attack for the present shape of body and flow conditions.

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Ali, Mostafa Gomaa Mahmoud, Neveen Abdel Latif Abdel Raoof, Magda Gaid Sedhom, Nesma Ahmed Helmy et Hossam Eddien Fawaz. « Effect of different lumbar lordotic angles on dynamic postural stability in young adults ». Fizjoterapia Polska 20, n^o 2 (30 juin 2020) : 142–47. http://dx.doi.org/10.56984/8zg0dc30e.

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Objectives. Lumbar lordosis is a main element in maintaining the sagittal balance. Improper postural alignment and trunk stability and excessive spine curvatures such as lordosis, kyphosis and scoliosis can impact our balance system adversely. This study was conducted to investigate the effect of different lumbar lordotic angles on dynamic postural stability and limits of stability in young adults. Methods. 100 normal male subjects participated in this study; their ages were ranged from 20 to 35 years and their BMI were ranged from 18.5 to 24.9 kg/m2. They assigned to two equal groups according to the lumbar lordotic angle. Group (A) (n = 50 males) control group with normal lumbar lordotic angles ranged from 20 to 60 degrees. Group (B) (n = 50 males) hyper lordotic group with lumbar lordotic angles more than 60 degrees. X-ray was done to measure the lumbar lordotic angles using cobb’s angle method and the biodex balance system was used for assessment of dynamic postural stability and limits of stability. Results. The findings of current study using the MANOVA test revealed that there was a significant effect of different lumbar lordotic angles on dynamic postural stability and limits of stability in young adults (p = 0.0001). Conclusion. It was concluded that the difference in lumbar lordotic angles had an effect on dynamic postural stability and limits of stability in young adults. Moreover, subjects with increased lumbar lordotic angles reported poor dynamic postural stability and decreased limits of stability compared with normal ones using the biodex balance system.

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Irmak, Özgür, et Ekim O. Orhan. « Kinematic analysis of new and used reciprocating endodontic motors in 2 different modes ». International Journal of Artificial Organs 41, n^o 1 (8 octobre 2017) : 17–22. http://dx.doi.org/10.5301/ijao.5000640.

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Purpose: The actual reciprocating angles of endodontic motors might differ from the manufacturers’ set values. This study analyzed the effect of clinical usage on the kinematics of reciprocating endodontic motors with 2 different reciprocal modes. Methods: 1 new and 3 used reciprocating endodontic motors (X-Smart Plus, Dentsply Maillefer) with 2 different reciprocating modes, WaveOne mode (W-mode) or Reciproc mode (R-mode), were analyzed. An angle measurement disc was inserted into a contra-angle. Reciprocating motions were recorded with a high-speed camera at 1,200 fps and analyzed on a computer. The following kinematic parameters were calculated: duration of each reciprocating motion, engaging and disengaging angles, cycle rotational speeds, engaging and disengaging rotational speeds, net cycle angle, total cycle angle, and number of cycles to complete full rotation. One-way ANOVA and Kruskal-Wallis test followed by multiple comparison tests were used for statistical analysis (p = 0.05). Results: In W-mode, the actual engaging angles of all used and new motors were different from the manufacturer’s set values (p<0.0001), whereas there was no difference between actual engaging angles among the motors (p>0.05). In R-mode, the actual engaging angles of all used and new motors were similar to the manufacturers’ set values (p>0.05). There was no difference between the actual engaging angles among motors (p>0.05). Both the W-mode and R-mode showed statistically different values of actual disengaging angles for all used and new motors when compared with the manufacturers’ set value (p<0.0001). Conclusions: This study confirmed that the actual kinematics of reciprocating endodontic motors differ from the manufacturers’ set values. Some kinematic parameters were influenced by the clinical usage of the motors.

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Dmitrieva, A. N., R. P. Kokoulin, A. A. Petrukhin et D. A. Timashkov. « Temperature coefficients for muons at different zenith angles ». Bulletin of the Russian Academy of Sciences : Physics 73, n^o 3 (mars 2009) : 353–56. http://dx.doi.org/10.3103/s1062873809030228.

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Godt, A., A. Muller, M. Kalwitzki et G. Goz. « Angles of facial convexity in different skeletal Classes ». European Journal of Orthodontics 29, n^o 6 (28 septembre 2007) : 648–53. http://dx.doi.org/10.1093/ejo/cjm073.

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Winser, K. J., M. Lockwood, G. O. L. Jones et K. Suvanto. « Observations of nonthermal plasmas at different aspect angles ». Journal of Geophysical Research 94, A2 (1989) : 1439. http://dx.doi.org/10.1029/ja094ia02p01439.

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Kutter, Bruce L., et Yie-Ruey Chen. « Constantp′ and Constant Volume Friction Angles Are Different ». Geotechnical Testing Journal 20, n^o 3 (septembre 1997) : GTJ19970006. http://dx.doi.org/10.1520/gtj19970006.

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Finset, Arnstein, et Hanne C. Lie. « Health literacy and communication explored from different angles ». Patient Education and Counseling 79, n^o 1 (avril 2010) : 1–2. http://dx.doi.org/10.1016/j.pec.2010.02.019.

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Chira, R. A., R. Siebenmorgen, Th Henning et J. Kainulainen. « Appearance of dusty filaments at different viewing angles ». Astronomy & ; Astrophysics 592 (août 2016) : A90. http://dx.doi.org/10.1051/0004-6361/201528028.

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Nakamura, So, Shinichi Inoue, Yoshinori Igarashi, Takeyuki Hoshi, Hiromi Sato et Yoko Mizokami. « Measurement of Gloss Unevenness with Different Reflection Angles ». Color and Imaging Conference 30, n^o 1 (15 novembre 2022) : 63–68. http://dx.doi.org/10.2352/cic.2022.30.1.13.

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Zhang, Jia-Rong, Jen-Hung Wang, Hong-Zin Lin et Yuan-Chieh Lee. « Anterior Chamber Angles in Different Types of Mucopolysaccharidoses ». American Journal of Ophthalmology 212 (avril 2020) : 175–84. http://dx.doi.org/10.1016/j.ajo.2020.01.007.

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Öztaş, Hande, et Ayça Gürarda. « Investigation of the Effects of Different Bias Angles of Stitching on Seam Performance of Wool Suits ». Autex Research Journal 19, n^o 4 (1 décembre 2019) : 324–31. http://dx.doi.org/10.1515/aut-2018-0060.

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Abstract Wool suits are always preferred due to their warmth retention in cool weather, comfort, and aesthetic features. Seams are very important for the quality of wool suits. The tensile characteristics of seamed fabric change with the change of fabric bias angle. This study aimed to investigate the effects of different seam angles with various stitch densities on the seam strength and the seam breaking extension of wool suit stitches. In this study, seam strength and seam-breaking elongation at different bias angles were investigated for the stitches of trousers and jackets of wool suits. As is known, in the production of trousers and jackets, the seams are applied not only in the direction of the weft and warp but also in the different bias angles at the crotch area and arm hole seams. Six wool fabrics with different structural properties were chosen as experimental samples. Fabrics were cut at 0°, 30°, 45°, 60°, and 90° angles and then sewn with three different stitch densities (3, 4, and 5 stitches/cm), with lockstitch stitch type for each fabric angle. Therefore, 90 differently seamed fabric samples were prepared. The results indicated that seams prepared with 0°,45° and 90° bias angles give the highest seam strength and that 30°, 45°, and 60° bias angles give the highest seam-breaking elongation values all over the samples. Seams prepared with 30° and 60° bias angles give the lowest seam strength, and 0° and 90° bias angles give the lowest seam-breaking elongation values all over the samples.

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Li, Ming, Changlin Huang, Saiyin Fang, Yue Zhao, Ning Xu, Gezhou Qin et Feilong Mao. « Study on the effect of different angles on the propagation characteristics of acoustic emission signals in wood ». Science Progress 106, n^o 2 (avril 2023) : 003685042311685. http://dx.doi.org/10.1177/00368504231168532.

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To explore the propagation characteristics of acoustic emission (AE) signals in wood at different angles. The AE signals at different angles were obtained by changing the angle of incidence by sawing the inclined surfaces at different angles. The Zelkova schneideriana specimen was sawn 5 times with an increment of 15°, and 5 different incidence angles were obtained. AE signals were collected by 5 sensors arranged equally on the surface of the specimen, AE energy and energy attenuation rate were calculated. The reflection signals corresponding to different angles were collected on the uncut specimen by changing the position of the sensors, and the propagation speed of the AE signals at different angles was calculated. The results showed that the kinetic energy provided by the external excitation is small, and the AE energy is mainly provided by the displacement potential energy. With the change of the incidence angle, the AE kinetic energy changes significantly. With the increase of the reflection angle, the speed of the reflected wave also continued to increase, and finally stabilized at 4600 m/s.

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Yang, Sha Sha, et Zhao Qun Du. « Analysis of Stabbing Performance of UHMWPE Fabric at Different Angles ». Advanced Materials Research 821-822 (septembre 2013) : 223–27. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.223.

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Flexible stab-resistant fabrics have been widely used in military and civilian fields; however, there are few researches about effects of incidence angle on stabbing performance of fabrics. Thereof, the stab-resistant mechanism of fabric is investigated from raw material selection, fabric preparation and quasi-static stab-resistant performance test. We analyzed and obtained the modes of interaction between knife and fabric and the mutual influence between the fabrics through different angles and the compound way at different angles. Results show that with the increasing of the angle of incidence, the cutting forces of fabric decrease and the strength reducing rate of fabric increases. The strength trend of compound fabric at different angles is the same as single layer fabric; however, the strength reducing rate firstly increases then decreases. It may be explained that there exists interaction between the fabrics in the cutting process.

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Paparazzo, Ernesto. « Viewing the World from Different Angles : Plato’s Timaeus 54E-55A ». Apeiron 46, n^o 3 (juillet 2013) : 244–69. http://dx.doi.org/10.1515/apeiron-2012-0052.

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Abstract The present article investigates a passage of the Timaeus in which Plato describes the construction of the pyramid. Scholars traditionally interpreted it as involving that the solid angle at the vertex of the pyramid is equal, or nearly so, to 180°, a value which they took to be that of the most obtuse of plane angles. I argue that this interpretation is not warranted, because it conflicts with both the geometrical principles which Plato in all probability knew and the context of the Timaeus. As well as recalling the definitions and properties of plane angles and solid angles in Euclid’s Elements, I offer an alternative interpretation, which in my opinion improves the comprehension of the passage, and makes it consistent with both the immediate and wider context of the Timaeus. I suggest that the passage marks a transition from plane geometry to solid geometry within Plato’s account of the universe.

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Banchi, Yoshihiro, et Takashi Kawai. « Evaluating user experience of different angle VR images ». Electronic Imaging 2021, n^o 2 (18 janvier 2021) : 98–1. http://dx.doi.org/10.2352/issn.2470-1173.2021.2.sda-098.

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This paper describes a comparison of user experience of virtual reality (VR) image angles. 7 angles conditions are prepared and evaluated the user experience during viewing VR images with a headset by measuring subjective and objective indexes. Angle conditions were every 30 degrees from 180 to 360 degrees. From the results of the subjective indexes (reality, presence, and depth sensation), a 360-degree image was evaluated highest, and different evaluations were made between 240 and 270 degrees.In addition, from the results of the objective indexes (eye and head tracking), a tendency to spread the eye and head movement was found as the image angle increases.

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Wattanapanich, Chirawat, Hong Wei et Wijittra Petchkit. « Investigation of robust gait recognition for different appearances and camera view angles ». International Journal of Electrical and Computer Engineering (IJECE) 11, n^o 5 (1 octobre 2021) : 3977. http://dx.doi.org/10.11591/ijece.v11i5.pp3977-3987.

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A gait recognition framework is proposed to tackle the challenge of unknown camera view angles as well as appearance changes in gait recognition. In the framework, camera view angles are firstly identified before gait recognition. Two compact images, gait energy image (GEI) and gait modified Gaussian image (GMGI), are used as the base gait feature images. Histogram of oriented gradients (HOG) is applied to the base gait feature images to generate feature descriptors, and then a final feature map after principal component analysis (PCA) operations on the descriptors are used to train support vector machine (SVM) models for individuals. A set of experiments are conducted on CASIA gait database B to investigate how appearance changes and unknown view angles affect the gait recognition accuracy under the proposed framework. The experimental results have shown that the framework is robust in dealing with unknown camera view angles, as well as appearance changes in gait recognition. In the unknown view angle testing, the recognition accuracy matches that of identical view angle testing in gait recognition. The proposed framework is specifically applicable in personal identification by gait in a small company/organization, where unintrusive personal identification is needed.

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Bezmenov, Vladimir. « The features of application of different systems of orientation angles at the processing of aerospace images ». E3S Web of Conferences 310 (2021) : 04004. http://dx.doi.org/10.1051/e3sconf/202131004004.

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The angular elements of external orientation characterize the position of a shooting camera relative to the coordinate system in which the spatial coordinates of the points of the object under study are determined from the processing of its images. In many cases of aerial photography, e.g. shooting from an unmanned aerial vehicle, as well as in the case of space survey, the values of the orientation angles could be very significant. This paper presents the results of numerical experiments for five different systems of external orientation angles (Euler angles). The studies were performed using the condition of complanarity, which is the basis of space forward intersection. For a space forward intersection, a model of errors in determining spatial coordinates for five systems of shooting camera orientation angles has been developed. In the numerical experiments, the general case of aerial photography from an unmanned aerial vehicle and of space survey of the Earth were simulated. By comparing the root-mean-square errors (RMSE) in determining the spatial coordinates obtained using the studied systems of external orientation angles, the features of the use of these systems of orientation angles were revealed. The results of the research will allow to determine the spatial coordinates of the points of the studied objects with a greater degree of reliability by photogrammetry methods.

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Wang, Yong, Jingmin Dai et Dongyang An. « Numerical Investigations on Melting Behavior of Phase Change Material in a Rectangular Cavity at Different Inclination Angles ». Applied Sciences 8, n^o 9 (12 septembre 2018) : 1627. http://dx.doi.org/10.3390/app8091627.

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This paper investigates the melting process of phase change material in a rectangular cavity at different inclination angles. Paraffin is used as a phase change material in this study. One side of the cavity is heated while the other sides are considered to be adiabatic. The investigated angles of inclination include 0° (bottom horizontal heating), 30°, 60°, 90° (vertical heating), 120°, 150° and 180° (top horizontal heating). Shapes of the solid liquid interface and temperature variations during the melting process were discussed for all the inclination angles. The results reveal that the inclination angles have a significant impact on the melting behavior of paraffin. As the angle increases from 0° to 180°, the complete melting time increases non-linearly.

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Tribst, João Paulo Mendes, Roberto Lo Giudice, Alison Flavio Campos dos Santos, Alexandre Luiz Souto Borges, Laís Regiane Silva-Concílio, Marina Amaral et Giuseppe Lo Giudice. « Lithium Disilicate Ceramic Endocrown Biomechanical Response According to Different Pulp Chamber Extension Angles and Filling Materials ». Materials 14, n^o 5 (9 mars 2021) : 1307. http://dx.doi.org/10.3390/ma14051307.

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The purpose of this study is to evaluate the effect of pulp chamber extension angles and filling material mechanical properties on the biomechanical response of a ceramic endocrown. A 3D model of maxillary molar that underwent endodontically treatment was exported to computer aided design software to conduct finite element analysis (FEA). The endocrown model was modified considering different pulp chamber extension angles (right angle; 6°, 12° and 18° of axial divergence). The solids were imported into the computer aided engineering software in Standard for the Exchange of Product Data (STEP) format. Nine different filling materials were simulated to seal the orifice of the root canal system under each endocrown restoration (resin composite, bulk-fill resin composite, alkasite, flowable resin composite, glass ionomer cement, autocured resin-reinforced glass ionomer cement, resin cement, bulk-fill flowable resin composite, zinc oxide cement), totaling 36 models. An axial load (300 N) was applied at the occlusal surface. Results were determined by colorimetric graphs of von-Misses stress (VMS) and Maximum Principal Stress (MPS) on tooth, cement layer, and endocrown restorations. VMS distribution showed a similar pattern between the models, with more stress at the load region for the right-angled endocrowns. The MPS showed that the endocrown intaglio surface and cement layer showed different mechanical responses with different filing materials and pulp chamber angles. The stress peaks plotted in the dispersion plot showed that the filling material stiffness is proportional to the stress magnitude in the endocrown, cement layer and tooth adhesive surface. In addition, the higher the pulp chamber preparation angle, the higher the stress peak in the restoration and tooth, and the lower the stress in the cement layer. Therefore, 6° and 12° pulp chamber angles showed more promising balance between the stresses of the adhesive interface structures. Under the conditions of this study, rigid filling materials were avoided to seal the orifice of root canal system when an endocrown restoration was planned as rehabilitation. In addition, the pulp chamber axial walls were prepared between 6° and 12° of divergence to balance the stress magnitude in the adhesive interface for this treatment modality.

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Akkuş, Tuba, Yusuf Şahin, Demet Yılmaz et Fatma Nur Tuzluca. « The K-beta/K-alpha intensity ratios of some elements at different azimuthal scattering angles at 59.54 keV ». Canadian Journal of Physics 95, n^o 3 (mars 2017) : 220–24. http://dx.doi.org/10.1139/cjp-2016-0598.

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In this study K-beta/K-alpha (Kβ/Kα) intensity ratios of the elements scandium (Sc), vanadium (V), chromium (Cr), nickel (Ni), copper (Cu), zinc (Zn), bromine (Br), yttrium (Y), zirconium (Zr), and niobium (Nb) have been measured at three azimuthal scattering angles (+30°, 0°, and −30°) for two fixed polar scattering angles (85° and 135°). The elements were excited by 59.54 keV gamma photons emitted from 100 mCi Am241 point source. The obtained experimental values were compared with the theoretical values presented in the literature. It is observed that Kβ/Kα intensity ratios of the investigated elements do not depend on azimuthal angles at fixed polar angles.

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Eshun, Felix Thompson, Talent CT Rupango et Wesley I. Umoren. « Finite Element Analysis on Hydroforming of CFRP/SS304 Composite Tube with different Fiber Orientation Stacking Sequence ». Journal of Mechanical, Civil and Industrial Engineering 3, n^o 2 (4 août 2022) : 17–23. http://dx.doi.org/10.32996/jmcie.2022.3.2.3.

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In this paper, a finite element-based approach to the tube hydroforming process of SS304/CFRP material with different stacking sequences was performed in an effort to reveal the failure phases at different stacking angles. The effort to produce hybrid composite tubes through tube hydroforming with composite reinforcement resulted in laminate failure at all the proposed fiber orientation angles. A comparative study of strain energy dissipation at these different stacking angles is further presented. The results show that the 00/900 stacking is considered the strongest stacking angle requiring the least strain energy absorption to initial failure of approximately 50 % more as compared to the ±300 and ±600 stacking angles. The proposed method was more adequate for predicting the strain energy, matrix deformation, and fiber damage when simulating the events.

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Patel, Ankush H., et Spurti Mamadapur. « A Comparative Study on T-beam Girder and Box Girder Bridges for Different Skew Angles ». Bonfring International Journal of Man Machine Interface 4, Special Issue (30 juillet 2016) : 167–72. http://dx.doi.org/10.9756/bijmmi.8176.

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Yanchukovsky, V. L., G. Ya Filimonov et R. Z. Hisamov. « Atmospheric variations in muon intensity for different zenith angles ». Bulletin of the Russian Academy of Sciences : Physics 71, n^o 7 (juillet 2007) : 1038–40. http://dx.doi.org/10.3103/s106287380707043x.

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Jamalaldini, MohammadHossein, MohammadReza Etemadifar et Rasoul Layeghi. « Successful brace treatment of Scheuermann's kyphosis with different angles ». Journal of Craniovertebral Junction and Spine 8, n^o 2 (2017) : 136. http://dx.doi.org/10.4103/jcvjs.jcvjs_38_16.

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&NA;. « Different angles on interleukins produce promising results in RA ». Inpharma Weekly &NA;, n^o 914 (novembre 1993) : 10. http://dx.doi.org/10.2165/00128413-199309140-00019.

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