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Journal articles on the topic 'Patched conic'

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Published: 4 June 2021

Last updated: 31 January 2023

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Li, Jin, Jianhui Zhao, and Fan Li. "A new method of patched-conic for interplanetary orbit." Optik 156 (March 2018): 121–27. http://dx.doi.org/10.1016/j.ijleo.2017.10.153.

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da Silva Fernandes, Sandro, and Cleverson Maranhão Porto Marinho. "Optimal Two-Impulse Trajectories with Moderate Flight Time for Earth-Moon Missions." Mathematical Problems in Engineering 2012 (2012): 1–34. http://dx.doi.org/10.1155/2012/971983.

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A study of optimal two-impulse trajectories with moderate flight time for Earth-Moon missions is presented. The optimization criterion is the total characteristic velocity. Three dynamical models are used to describe the motion of the space vehicle: the well-known patched-conic approximation and two versions of the planar circular restricted three-body problem (PCR3BP). In the patched-conic approximation model, the parameters to be optimized are two: initial phase angle of space vehicle and the first velocity impulse. In the PCR3BP models, the parameters to be optimized are four: initial phase angle of space vehicle, flight time, and the first and the second velocity impulses. In all cases, the optimization problem has one degree of freedom and can be solved by means of an algorithm based on gradient method in conjunction with Newton-Raphson method.

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Wang, Shuquan. "Patched Conic Section Maneuver Trajectory Planning For Two-Craft Coulomb Formation." IEEE Transactions on Aerospace and Electronic Systems 53, no. 1 (2017): 258–72. http://dx.doi.org/10.1109/taes.2017.2650098.

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Arthur Gagg Filho, Luiz, and Sandro da Silva Fernandes. "Optimal round trip lunar missions based on the patched-conic approximation." Computational and Applied Mathematics 35, no. 3 (2015): 753–87. http://dx.doi.org/10.1007/s40314-015-0247-y.

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Xu, Yinan, and Shuquan Wang. "Reconfiguration of Three-Craft Coulomb Formation Based on Patched-Conic-Section Trajectories." Journal of Guidance, Control, and Dynamics 39, no. 3 (2016): 474–86. http://dx.doi.org/10.2514/1.g001557.

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Iwabuchi, Masakazu, Satoshi Satoh, and Katsuhiko Yamada. "Smooth and continuous interplanetary trajectory design of spacecraft using iterative patched-conic method." Acta Astronautica 185 (August 2021): 58–69. http://dx.doi.org/10.1016/j.actaastro.2021.04.021.

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Gagg Filho, Luiz Arthur, and Sandro da Silva Fernandes. "Interplanetary patched-conic approximation with an intermediary swing-by maneuver with the moon." Computational and Applied Mathematics 37, S1 (2017): 27–54. http://dx.doi.org/10.1007/s40314-017-0529-7.

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Parvathi, S. P., and R. V. Ramanan. "Direct transfer trajectory design options for interplanetary orbiter missions using an iterative patched conic method." Advances in Space Research 59, no. 7 (2017): 1763–74. http://dx.doi.org/10.1016/j.asr.2017.01.023.

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Salazar, F. J. T., E. E. N. Macau, and O. C. Winter. "Pareto Frontier for the time–energy cost vector to an Earth–Moon transfer orbit using the patched-conic approximation." Computational and Applied Mathematics 34, no. 2 (2014): 461–75. http://dx.doi.org/10.1007/s40314-014-0154-7.

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Jia, Feida, Qibo Peng, Wanmeng Zhou, and Xiangyu Li. "Integrated Design of Moon-to-Earth Transfer Trajectory Considering Re-Entry Constraints." Applied Sciences 12, no. 17 (2022): 8716. http://dx.doi.org/10.3390/app12178716.

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The exploration of the Moon has always been a hot topic. The determination of the Moon-to-Earth transfer opportunity and the design of the precise transfer trajectory play important roles in manned Moon exploration missions. It is still a difficult problem to determine the Moon-to-Earth return opportunity for accurate atmospheric re-entry and landing, through which the actual return trajectory can be easily obtained later. This paper proposes an efficient integrated design method for Moon-to-Earth window searching and precise trajectory optimization considering the constraints of Earth re-entry and landing. First, an analytical geometry-based method is proposed to determine the state of the re-entry point according to the landing field and re-entry constraints to ensure accurate landing. Next, the transfer window is determined with the perilune heights, which are acquired by inversely integrating the re-entry state under the simplified dynamics as criterion. Then, the precise Moon-to-Earth trajectory is quickly obtained by a three-impulse correction. Simulations show the accuracy and efficiency of the proposed method compared with methods such as the patched-conic method and provide an explicit reference for future Moon exploration missions.

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Matsuzaki, Kanji, Akihiko Ikeda, Taisuke Konishi, and Tomoaki Jikuya. "Flat and Conic Patches for Acute Ventricular Septal Perforation." Journal of the Japanese Coronary Association 19, no. 4 (2013): 371–74. http://dx.doi.org/10.7793/jcoron.19.13-00024.

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Baart, M. L., and M. A. Coetzee. "Transfinite interpolation of conic triangles using quadric patches." Computers & Mathematics with Applications 34, no. 9 (1997): 75–85. http://dx.doi.org/10.1016/s0898-1221(97)00190-9.

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Lee, Sukhan, Kyeong Dae Yoo, Jae Woong Kim, and Moon Ju Lee. "Surface Patch Primitive Based Object Modeling from CAD Data." Applied Mechanics and Materials 162 (March 2012): 179–83. http://dx.doi.org/10.4028/www.scientific.net/amm.162.179.

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For manufacturing automation, for instance, the robotic automation of automobile sub-assembly, CAD data serves as DB offering the geometric information of parts essential for robotic manipulation. However, a direct application of CAD for the robotic manipulation of parts may be of an issue, due to the fact that the particular format of the CAD data available, e.g., STL, does not directly provide certain geometric entities such as surface patch primitives and/or features that are required for robotic manipulation. In this paper, we present a novel method for extracting geometric primitives and/or features, such surface patch primitives as planar, cylindrical, conic, and spherical patches, from the STL format of CAD data, such that an industrial part/object can be represented as a logical sum of these surface patch primitives extracted. This surface patch primitive based modeling makes the automated reasoning involved in the recognition and pose estimation, as well as the grasp planning, of parts/objects easy to be done. The proposed method is applied to various CAD data samples for experimentation: the results demonstrate the reliability as well as the computational efficiency of the proposed method in the extraction of surface patch primitives.

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Zhang, Futao, Yan Xu, Falai Chen, and Ruihan Guo. "Interior Penalty Discontinuous Galerkin Based Isogeometric Analysis for Allen-Cahn Equations on Surfaces." Communications in Computational Physics 18, no. 5 (2015): 1380–416. http://dx.doi.org/10.4208/cicp.010914.180315a.

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AbstractWe propose a method that combines Isogeometric Analysis (IGA) with the interior penalty discontinuous Galerkin (IPDG) method for solving the Allen-Cahn equation, arising from phase transition in materials science, on three-dimensional (3D) surfaces consisting of multiple patches. DG ideology is adopted at patch level, i.e., we employ the standard IGA within each patch, and employ the IPDG method across the patch interfaces. IGA is very suitable for solving Partial Differential Equations (PDEs) on (3D) surfaces and the IPDG method is used to glue the multiple patches together to get the right solution. Our method takes advantage of both IGA and the IPDG method, which allows us to design a superior semi-discrete (in time) IPDG scheme. First and most importantly, the time-consuming mesh generation process in traditional Finite Element Analysis (FEA) is no longer necessary and refinements, includingh-refinement andp-refinement which both maintain the original geometry, can be easily performed at any level. Moreover, the flexibility of the IPDG method makes our method very easy to handle cases with non-conforming patches and different degrees across the patch interfaces. Additionally, the geometrical error is eliminated (for all conic sections) or significantly reduced at the beginning due to the geometric flexibility of IGA basis functions, especially the use of multiple patches. Finally, this method can be easily formulated and implemented. We present our semi-discrete IPDG scheme after generally describe the problem, and then briefly introduce the time marching method employed in this paper. Theoretical analysis is carried out to show that our method satisfies a discrete energy law, and achieves the optimal convergence rate with respect to theL2norm. Furthermore, we propose an elliptic projection operator on (3D) surfaces and prove an approximation error estimate which are vital for us to obtain the error estimate in theL2norm. Numerical tests are given to validate the theory and gauge the good performance of our method.

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Canavesi, Cristina, William J. Cassarly, and Jannick P. Rolland. "Target flux estimation by calculating intersections between neighboring conic reflector patches." Optics Letters 38, no. 23 (2013): 5012. http://dx.doi.org/10.1364/ol.38.005012.

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Negri, Rodolfo Batista, Alexander Sukhanov, and Antônio Fernando Bertachini de Almeida Prado. "Lunar gravity assists using patched-conics approximation, three and four body problems." Advances in Space Research 64, no. 1 (2019): 42–63. http://dx.doi.org/10.1016/j.asr.2019.04.002.

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Rahman, Mizanur, Md Tarikul Islam, Hamudur Rahman, and Masud Ahmed. "Etiological factors of Intussusception among children in a tertiary care hospital." Bangladesh Medical Journal Khulna 49, no. 1-2 (2017): 23–26. http://dx.doi.org/10.3329/bmjk.v49i1-2.31821.

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Background: There are still dearth of knowlege of intussusception regarding its aetiology and predisposing factor among children.Objectives: We attempted to find out per operatively the etiological factors responsible for intussusceptions in children and their association with predisposing factors in our context. We also intended to know peroperatively the specific role of hypertrophid Peyer's patches of mesenteric lymph adenitis as lead points.Methodology: This prospective observational study was conducted in Khulna Medical College Hospital and other private hospitals in Khulna from November 2012 to April 2016. A total of 50 patients who underwent surgery for intussusception were included in the study. Seasonal influences, gastroenteritis and upper respiratory tract infections were evaluated as predisposing factors and presence of hypertrophied Peyer's patches and other lead points were evaluated as etiological factors. Peroperatively the causes were identified and their association with viral gastroenteritis and respiratory tract infection were intended to find out.Results: seventy two percent of the patients were below one year. A male preponderance was observed (70%). Thirty two percent were affected in the spring and 36% in the summer. Half (54%) of the patients had a history of gastroenteritis, while 40% had a history of respiratory tract infection. Per operative findings, show that three quarter (76%) had ileo colic, 18% had ileo ileo colic and only 6% had ileo ileal variety of intussusceptions. Forty two (89.3%) patients had hypertrophied Peyer's patches or Mesenteric lymphadenities.Conclusion: Hypertrophied Peyer's patches or Mesenteric lymphadenitis are the main etiological factor of intussusceptions in our children.Bang Med J (Khulna) 2016; 49 : 23-26

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Bradley, Nicholas, and Ryan P. Russell. "A Continuation Method for Converting Trajectories from Patched Conics to Full Gravity Models." Journal of the Astronautical Sciences 61, no. 3 (2014): 227–54. http://dx.doi.org/10.1007/s40295-014-0017-x.

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Armellin, R., P. Di Lizia, K. Makino, and M. Berz. "Rigorous global optimization of impulsive planet-to-planet transfers in the patched-conics approximation." Engineering Optimization 44, no. 2 (2012): 133–55. http://dx.doi.org/10.1080/0305215x.2011.570757.

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PRADO, A. "A comparison of the “patched-conics approach” and the restricted problem for swing-bys." Advances in Space Research 40, no. 1 (2007): 113–17. http://dx.doi.org/10.1016/j.asr.2007.01.012.

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Gu, Li Zhi, and Bin Cheng. "Three D Spiral Surface Modeling by Simulation Based on the Section Profile Revolution – Accumulation Method." Applied Mechanics and Materials 184-185 (June 2012): 599–604. http://dx.doi.org/10.4028/www.scientific.net/amm.184-185.599.

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General expression of spiral is derived by turning any section profile into the end section profile, in terms of surface parameter equations based on the modeling principle in machining operations, and the body of spiral surface is divided into two parts, rotation part and spiral part, indicating the key point that the relative portion between the two parts is most important. “Revolution -Accumulation Method” is put forward with triangular patches being connected into a tiny slide. And the slides are rotated to some degrees and then superimposed together along the axis of the spiral, so as to construct final spiral surface. Two examples of modeling with Revolution- Accumulation Method, cylindrical spiral model and conic spiral model, the most widely used in engineering, are given and successfully executed.

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Othersen, H. Biemann, Edward F. Parker, John Chandler, C. D. Smith, and Edward P. Tagge. "Save the child's esophagus, part II: Colic patch repair." Journal of Pediatric Surgery 32, no. 2 (1997): 328–33. http://dx.doi.org/10.1016/s0022-3468(97)90204-9.

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Ferreira, A. F. S., R. V. de Moraes, A. F. B. A. Prado, O. C. Winter, and V. M. Gomes. "A SURVEY ON EXTENSIONS OF THE PURE GRAVITY SWING-BY MANEUVER." Revista Mexicana de Astronomía y Astrofísica 57, no. 2 (2021): 445–57. http://dx.doi.org/10.22201/ia.01851101p.2021.57.02.16.

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The present paper surveys the more recent techniques related to the swingby maneuver, where a spacecraft changes its energy and angular momentum by passing close to celestial bodies. It is focused on the literature related to extensions of this maneuver, with emphasis in the powered version, where an impulse is applied to the spacecraft near the closest approach. Several mathematical models are considered, including the patched-conics approximation for analytical studies, and the restricted three-body problem for the numerical simulations. The main goal is to show the models and the main conclusions available in the literature for those maneuvers. Some key results are shown to discuss important aspects of this maneuver, including the analysis of the energy variation of the spacecraft, the behavior of the trajectories and other applications.

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Ammar, M. K., and D. A. Oda. "Design of Gravity Assist trajectory from Earth to Jupiter." Applied Mathematics and Nonlinear Sciences 3, no. 1 (2018): 151–60. http://dx.doi.org/10.21042/amns.2018.1.00011.

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AbstractThe goal of this paper is to find a combination of conical trajectories, using gravitational assisted maneuvers (swing-by), which perform the transfer from a nearby of the departure planet (Earth) to the vicinity of the arrival planet (Jupiter), making a closest approaches with Mars (flyby) to reduce the fuel consumption for the journey. A detailed description of the mission from Earth— Mars—Jupiter, that used this technique is presented. The table of flyby dates, altitudes of closest approaches is also included. A methodology known as the Patched Conics was used, where the trajectory is divided into three parts:Departure phase, inside of the sphere of influence of the departure planet,Heliocentric phase, during the journey between the planets,Arrival phase, inside the sphere of influence of the arrival planet.

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Sanchez, D. M., A. A. Sukhanov, and A. F. B. A. Prado. "OPTIMAL TRAJECTORIES TO KUIPER BELT OBJECTS." Revista Mexicana de Astronomía y Astrofísica 55, no. 1 (2019): 39–54. http://dx.doi.org/10.22201/ia.01851101p.2019.55.01.06.

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The present paper searches for transfers from the Earth to three of the Kuiper Belt Objects (KBO): Haumea, Makemake, and Quaoar. These trajectories are obtained considering different possibilities of intermediate planet gravity assists. The model is based on the “patched-conics” approach. The best trajectories are found by searching for the minimum total ∆V transfer for a given launch window, inside the 2023-2034 interval, and disregarding the ∆V required for the capture at the target object. The results show transfers with duration below 20 years that spend a total ∆ V under 10 km/s. There is also one trajectory for each of the KBOs with ∆V under 10 km/s and duration below 10 years, using the Jupiter swingby. For the 20-year trajectories, there are also asteroids in the main belt that could be encountered with low additional ∆V , so increasing the scientific return of the mission.

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Berveglieri, Adilson, and Antonio Tommaselli. "Reconstruction of Cylindrical Surfaces Using Digital Image Correlation." Sensors 18, no. 12 (2018): 4183. http://dx.doi.org/10.3390/s18124183.

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A technique for the reconstruction of cylindrical surfaces using optical images with an extension of least squares matching is presented. This technique is based on stereo-image acquisition of a cylindrical object, and it involves displacing the camera following the object length. The basic concept behind this technique is that variations in the camera viewpoint over a cylindrical object produce perspective effects similar to a conic section in an image sequence. Such parallax changes are continuous and can be modelled by a second-order function, which is combined with an adaptive least squares matching (ALSM) for the 3D object reconstruction. Using this concept, a photogrammetric intersection with only two image patches can be used to model a cylindrical object with high accuracy. Experiments were conducted with a cylinder on a panel with coded targets to assess the 3D reconstruction accuracy. The accuracy assessment was based on a comparison between the estimated diameter and the diameter directly measured over the cylinder. The difference between the diameters indicated an accuracy of 1/10 mm, and the cylindrical surface was entirely reconstructed.

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Genta, Giancarlo, and P. Federica Maffione. "IRMA: a Graphical Tool for Interplanetary Mission Design." MATEC Web of Conferences 210 (2018): 02049. http://dx.doi.org/10.1051/matecconf/201821002049.

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Designing an interplanetary mission is a complex task and requires the choice of the launch opportunity and of the exact launch and arrival dates. Depending on these choices, the trajectory must be defined and, in case of continuous thrust, also the thrust profile needs to be optimized.. Traditionally, these choices are made using some plots which allow to find a good compromise between the travel duration and the cost of the mission, which is often expressed in terms of initial mass in Earth orbit (IMLEO). IRMA (InterPlanetary Mission Analysis) code, based on the MATLAB®environment, is here described. It allows to deal with both impulsive propulsion (using the patched conics approach) and low continuous thrust (Solar or Nuclear electric or propellantless, like solar sails). A specific solver, based on indirect optimization techniques, has been developed specifically for this program, but IRMA can be used also as an interface for standard solvers, based on direct methods, like the FALCON.m code.

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Negri, Rodolfo Batista, Antonio Fernando Bertachini de Alme Prado, and Alexander Sukhanov. "Studying the errors in the estimation of the variation of energy by the “patched-conics” model in the three-dimensional swing-by." Celestial Mechanics and Dynamical Astronomy 129, no. 3 (2017): 269–84. http://dx.doi.org/10.1007/s10569-017-9779-3.

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Zhou, Wanmeng, Haiyang Li, Hua Wang, and Ran Ding. "Low-Thrust Trajectory Design Using Finite Fourier Series Approximation of Pseudoequinoctial Elements." International Journal of Aerospace Engineering 2019 (November 4, 2019): 1–18. http://dx.doi.org/10.1155/2019/1364834.

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A new low-thrust trajectory design method is proposed that is based on the finite Fourier series method with pseudoequinoctial elements rather than the more common cylindrical coordinate components. The bijection relation between the elements and control variables is ensured by introducing an additional equality constraint derived from the angular momentum conservation. The guidance law and on-line control variables are obtained by applying inverse dynamics and the framework of inverse simulation technology, respectively. The pseudoequinoctial finite Fourier series method has the advantages of both the Fourier series and the perturbation analysis methods. For two-body problems, three cases were studied: the Earth to Mars, 1989ML, and Tempel-1 missions. Regarding the design of a rendezvous trajectory with a large inclination angle and a high eccentricity rate, this method yields a broader range of feasible results than the traditional Fourier series method. The circular restricted three-body problem was solved for the first time using the pseudoequinoctial finite Fourier series method combined with the patched conics method. The low-thrust Earth-Moon transfer was analyzed, and the results show that this method improves window analysis efficiency and guarantees precision of the initial geocentric trajectory for the low-thrust transfer.

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Torres, Karla de Souza, and A. F. B. A. Prado. "Changing inclination of earth satellites using the gravity of the moon." Mathematical Problems in Engineering 2006 (2006): 1–13. http://dx.doi.org/10.1155/mpe/2006/13690.

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We analyze the problem of the orbital control of an Earth's satellite using the gravity of the Moon. The main objective is to study a technique to decrease the fuel consumption of a plane change maneuver to be performed in a satellite that is in orbit around the Earth. The main idea of this approach is to send the satellite to the Moon using a single-impulsive maneuver, use the gravity field of the Moon to make the desired plane change of the trajectory, and then return the satellite to its nominal semimajor axis and eccentricity using a bi-impulsive Hohmann-type maneuver. The satellite is assumed to start in a Keplerian orbit in the plane of the lunar orbit around the Earth and the goal is to put it in a similar orbit that differs from the initial orbit only by the inclination. A description of the close-approach maneuver is made in the three-dimensional space. Analytical equations based on the patched conics approach are used to calculate the variation in velocity, angular momentum, energy, and inclination of the satellite. Then, several simulations are made to evaluate the savings involved. The time required by those transfers is also calculated and shown.

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Garnier, Lionel, Lucie Druoton, Jean-Paul Bécar, Laurent Fuchs, and Géraldine Morin. "Subdivisions of Horned or Spindle Dupin Cyclides Using Bézier Curves with Mass Points." WSEAS TRANSACTIONS ON MATHEMATICS 20 (December 31, 2021): 756–76. http://dx.doi.org/10.37394/23206.2021.20.80.

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This paper shows the same algorithm is used for subdivisions of Dupin cyclides with singular points and quadratic Bézier curves passing through infinity. The mass points are usefull for any quadratic Bézier representation of a parabola or an hyperbola arc. The mass points are mixing weighted points and pure vectors. Any Dupin cyclide is considered in the Minkowski-Lorentz space. In that space, the Dupin cyclide is defined by the union of two conics laying on the unit pseudo-hypersphere, called the space of spheres. The subdivision of any Dupin cyclide, is equivalent to subdivide two Bézier curves of degree 2 with mass points, independently. The use of these two curves eases the subdivision of a Dupin cyclide patch or triangle.

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Pierce, Harold G., and Donald L. Rasmussen. "The nonmarine mollusks of the Late Oligocene–Early Miocene Cabbage Patch fauna of western Montana. I. Geologic setting and the family Pupillidae (Pulmonata: Stylommatophora)." Journal of Paleontology 66, no. 1 (1992): 39–52. http://dx.doi.org/10.1017/s0022336000033473.

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A large, diverse, and well-preserved fauna of nonmarine mollusks has been recovered from the late Oligocene to early Miocene (Arikareean) fluviatile and lacustrine sediments that accumulated in four intermontane structural basins of western Montana. The Pupillidae are represented by 10 species, with nine new species and one new subgenus among three extant genera. The Gastrocopta are very diverse, with one new subgenus Ameralbinula represented by three new species, G. obesa, G. russelli, and G. oviforma, while three new species, G. tavennerensis, G. leonardi, and G. conica, are referred to the extant subgenus Vertigopsis Sterki, 1893. Gastrocopta miniscula cannot be referred to a subgenus with certainty. The remaining new species, Vertigo whitei and Pupoides montana, are referred confidently to extant subgenera. Vertigo arenula (White, 1876) is the only previously described species and its description is emended based on new material. The mammalian biostratigraphy of the Cabbage Patch beds is presented.

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Kalugina and Stolbova. "HELMINTHOFAUNA OF HORSES IN TYUMEN REGION." THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL, no. 22 (May 19, 2021): 223–28. http://dx.doi.org/10.31016/978-5-6046256-1-3.2021.22.223-228.

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Today, helminthous invasions in horses are one of the important problems for veterinary specialists, since the action of helminths significantly affects the general condition of horses, allergic and toxic manifestations of diseases are observed, external qualities are worsened, performance, endurance, natural resistance are reduced, which leads to the emergence of diseases of various etiologies. We set the goal – to study the helminthofauna of horses in the Tyumen region. For the study of horse helminthoses, an animal survey was conducted in the period 2017–2020. As a result of the data obtained, it was found that horses have a mixed helminthose invasion consisting of nematodes of the Oxyuridae family (Oxyuris equi) during the parasitization of which, in horses, it was revealed – the rumpleness of the hair-covering of the dock, the formation of bald patches and the release of white plaque from the anal orifice, with Ascaridae (Parascaris equorum) there were seizures of cough and nasal secretions, as well as horses had reduced appetite and increased fatigue, with Strongyloididae (Strongyloides westeri) – foals had a delay in molting and an increase in abdominal volume, the Strongylata suborder caused digestive disorder with colic attacks. To prevent the spread of helminthous invasions, it is necessary to carry out the main integrated system for control helminthosis, which includes veterinary, sanitary and therapeutic and preventive events.

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Pavliuk, V. V., and N. S. Kovalchuk. "Perlyna as a new strawberry (Fragaria ananassa L.) cultivar for the berries con-sumption as fresh and for freezing." Horticulture: Interdepartment Subject Scientific Collection, no. 75 (2020): 50–58. http://dx.doi.org/10.35205/0558-1125-2020-75-50-58.

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Strawberry is the most spreaded small fruit crop in many countries. In Ukraine sn 2018 this crop total area was 8.3 thus. ha, among them 7.9 thus. ha fruit-bearing in all the categories of farms. The gross berries output was 62.3 thus. tons, the average yield being 7.7 t/ha. The Dutch bank «Rаdobank» carried out in April of 2016 the researches on the small fruit production in Europe and revealed that strawberry even now is the most popular small fruit crop. The strawberry Ukrainian and foreign cvs and elite forms were studied applying the methods of the primary strain inves-tigation and state strain testing in the small fruit patches planted in2012-2016 under the field conditions of the Northern part of the Ukraine’s Lisosteppe, namely: at the Institute of Horticulture NAAS of Ukraine. The varieties – standards were the Ukrainian Hercules, English Elegance, Dutch Elsanta and Italian Alba. As a result the new middle-ripening Ukraini-an cultivar Perlyna was selected as the best according to its signs. Perlyna was obtained by means of the intervarietal hybridization (cvs Present and Elsanta) sn 2004. The authors are V.V. Pavliuk, K. M. Kopan, V. H. Kopan. The berries ripe 2-3 days later than ’Elsanta’ and 2-3 days earlier than and ’Polka’. The bushes are high and vigour, not branchy, with firm high floriferous shoots and dark-green hardish leaves. Resistance to the leaves diseases is high. The berries are high marketable and large (the mass of average is 15 g, maximum 35 g), prolonged broad-conic, being ripe fully dark-red brilliant. The flesh is dense red aromatic of kind sour-sweet taste, in accordance with the multi-year data it contains 7.5 % of dry substances, 3.5 % of sugars, 0.95-1.0 % of organic acids as well as 0.440 mg of pectine substances and 45 mg of vitamin ’C ’ per 100 g of . Under the sufficient humid content the berries size exceeds that of ’Prysviata ’, ’Zenga Zengana’ and ’Polka ’. The yield is higher (18-20 t/ha) than that of the varieties ’Elsanta ’and ’Present ’ under the one-row planting ( 0.8x0.25 m). The cultivar is winter-hardy and drought- resistant. ’Perlyna’ is entered into the State Register of Plant Varieties Suitable for Dissemination in Ukraine. Certificate 181079 on the State Registration of the Plant Cultivar (December 4, 2018). Patent 190373 on the Plant Cultivar (April 12.2019).

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Gaspar, Bogdan Severus, Sanda Maria Cretoiu, Mircea Beuran, et al. "Chronic Evolution of a Covered Perforation of Middle Third Transverse Colon by a Toothpick: A Case Report." International Journal of Clinical Investigation and Case Reports 01, no. 03 (2022): 56–62. http://dx.doi.org/10.55828/ijcicr-13-11.

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Background: Foreign bodies (FBs) ingestion is generally rare but they can cause often bowel perforation if they have a sharp form and the patient did not manage to eliminate it naturally in the stools. Sometimes they can pierce the digestive tube wall leading to acute complications. Among the numerous cases of ingestion of FBs presented in the literature, the current case of transverse colon perforation, with chronic evolution, epiploic and pelvic abscess, submesocolic perivisceritis represents a particular one. Case Presentation: We present a case of a 59-year-old female patient, reported episodes of transitory melena in the past 6 months and chronic pain in the right iliac fossa, chronic anemia after ingesting a toothpick. The patient complained of chronic pain in the right iliac fossa, melena, intestinal transit disorders et impaired digestive tolerance. Computerized Tomography (CT) scan suggested peritonitis with pelvic adhesions and possible covered perforation in the right iliac fossa. Surgery started as an exploratory laparotomy to define the final diagnosis since a tumoral pathology couldn’t be eliminated. Colic perforation by a toothpick was found, followed by colporrhaphy and a biosynthetic patch on the great omentum. Conclusion: This paper presents the case of a patient with a sharp foreign body (toothpick) positioned in the transverse colon. The toothpick was ingested a few months ago and had a subtle chronic evolution causing colon perforation, covered peritonitis, intra-abdominal abscess, and chronic anemia because of recurrent episodes of melena. The treatment of choice was surgery with good postoperative evolution.

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Nagaraju, Rashmi Mysore, and Bhimarao Bhimarao. "Erdheim-Chester Disease - Multisystemic Radiological Manifestations." Journal of Evidence Based Medicine and Healthcare 8, no. 29 (2021): 2674–78. http://dx.doi.org/10.18410/jebmh/2021/492.

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Erdheim-Chester disease (ECD) is a rare, multisystem disorder with a constellation of clinical and radiological findings. We present a case of ECD who came with acute obstructive uropathy and chronic bone pain. Radiological work up in this patient led to a host of findings in various systems, the correlation of which led to narrowing of the differential diagnoses. A 44-year-old male presented with right loin pain and nausea for 1-day duration. A provisional diagnosis of right ureteric colic was made. Routine lab investigations revealed normal total counts and urine analysis. Additional laboratory investigations revealed a raised erythrocyte sedimentation rate (ESR) and Creactive protein (CRP). Radiological Investigations 1. Patient was referred for ultrasound of abdomen which revealed mild to moderate right hydronephrosis with a suspicious hypoechoic area (~ 0.7 x 1.2 cm) in the renal pelvis region raising possibility of a lesion. 2. Contrast computed tomography (CT) study of abdomen was performed which revealed enhancing soft tissue infiltration (+30 to +45 HU) around bilateral kidneys (giving ‘hairy kidney appearance’) (Figures 1, 2 & 3) and adrenal glands with infiltration to renal sinus and constriction of bilateral renal pelves resulting in moderate right and mild left hydronephrosis. Thin streak of excreted contrast was traversing the narrowed segment of renal pelves (Figures 4 & 5). 3. Soft tissue infiltration covering the visualized thoracic and abdominal aorta (giving ‘coated aorta appearance’) (Figures 6 & 7), extending below renal arteries to aortic bifurcation and proximal bilateral common iliac arteries. 4. The adrenal glands were not separately visualized from the above mentioned perinephric soft tissue. 5. Both ureters were normal in course and caliber. No evidence of ureteric calculus. 6. No significant retroperitoneal lymphadenopathy. 7. Few tiny centriacinar nodules with patchy ground glass opacities in postero basal segment of both lungs (left > right) (Figure 8).

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Zaraa, Inès, Imen Labbène, Sondes Trojjet, et al. "Endogenous Ochronosis with a Fatal Outcome." Journal of Cutaneous Medicine and Surgery 16, no. 5 (2012): 357–60. http://dx.doi.org/10.1177/120347541201600515.

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Background: Endogenous ochronosis (EO) is an autosomal recessive inherited disorder where there is incomplete oxidation of tyrosine and phenylalanine due to a lack of the enzyme homogentisic acid oxidase. Objective: We report a singular observation of EO with a fatal outcome. Case Report: We report the case of a 46-year-old man born to consanguineous parents with a medical history of recurrent renal colic and chronic nonspecific arthropathy. On clinical examination, slate blue pigmentation was seen on the cheeks, forehead, and nose, as well as blue-gray patches on all fingernails and bluish discoloration of the gums. Familial investigation revealed that his sister had similar pigmentation on the ears, hands, and fingernails. Histologic examination of a biopsy specimen from a pigmented lesion showed a dermal deposit of an acellular, eosinophilic material without cell reaction. Based on the clinical and histopathologic data, combined with the family medical history, our patient was considered to have EO with mucocutaneous, articular, and renal involvement. Unfortunately, the diagnosis was late because our patient died a few months later of terminal renal failure. Conclusion: Skin signs are the hallmarks of EO and must alert the clinician to look for involvement of vital organs. Renseignements de base: L'ochronose endogène (OE) est une affection héréditaire récessive autosomique où il se produit une oxydation incomplète de la tyrosine et de la phénylalanine en raison d'un manque d'oxydase de l'acide homogentisique. Objectif: Nous présentons une observation singulière d'OE dont l'issue a été fatale. Rapport de cas: Nous exposons le cas d'un homme de 46 ans né de parents consanguins ayant des antécédents médicaux de coliques néphrétiques récurrentes et une arthropathie chronique non spécifique. À l'examen clinique, nous avons observé une pigmentation bleu ardoise au niveau des joues, du front, et du nez, ainsi que des plaques bleu gris sur tous les ongles de doigts et une décoloration bleuâtre des gencives. Une étude des antécédents familiaux a révélé que sa sœur présentait une pigmentation semblable au niveau des oreilles, des mains, et des ongles de doigts. L'examen histologique de l'échantillon de la biopsie pratiquée sur une lésion pigmentée a montré un dépôt cutané de matériel éosinophile acellulaire sans réaction cellulaire. Selon les données cliniques et histopathologiques, combinées aux antécédents médicaux familiaux, notre patient présentait une OE avec une atteinte rénale, articulaire, et muco-cutanée. Malheureusement, le diagnostic a été tardif puisque notre patient est décédé quelques mois plus tard d'insuffisance rénale terminale. Conclusion: Les signes cutanés constituent les caractéristiques de l'OE et ceux-ci doivent alerter le clinicien de manière à ce qu'il cherche la contribution des organes vitaux.

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Landau, Damon, Stefano Campagnola, and Etienne Pellegrini. "Star Searches for Patched-Conic Trajectories." Journal of the Astronautical Sciences, November 11, 2022. http://dx.doi.org/10.1007/s40295-022-00350-y.

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Choudhury, K. B. Dev, and M. Sarma. "Lymphatic Drainage Conduit and Macro Anatomy of Lymphoid System in Large Intestine of Post Weaned Pigs." Indian Journal of Animal Research, Of (July 22, 2022). http://dx.doi.org/10.18805/ijar.b-4834.

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Background: The gut mucosa is effectively protected by a local organization of lymphoid tissue. In large intestine, isolated lymphoid follicles give rise to solitary lymphoid nodules and lympho glandular complexes, which are responsible for sampling of gut antigen and production of local immunity. Large intestine requires higher level of mucosal protection as because it is the site where food staff remains for a longer period and also for ascending rectal infection. Present study was undertaken highlighting the lymphatic drainage from large intestine and solitary lymphoid nodules of pig. Methods: 1% solution of methylene blue up to 100 micro litters in the one place of submucosa of large intestine as per the standard technique advocated by Smedley et al. (2014) and then stained nearest mesenteric lymph nodes were recorded and re-injected to map the drainage to the next draining lymph node to trace the lymphatic tract. Result: The study was designed on 12 (Twelve) apparently healthy weaned crossbred piglets of 3 to 4 months age irrespective of sex. Gross study revealed the presence of two different types of solitary lymphatic nodules (SLN) viz. scrotiform and faviform. The scrotiform SLN consisted of central small pore was appreciated in colon and rectum, whereas the faviform SLN although present in colon and rectum was devoid of a central pore. The average solitary lymphoid nodules in the large intestine was 427, of which 403 in colon and 24 in rectum and in terminal part of rectum patches of solitary lymphoid nodules of more than 100 numbers were observed. The different lymph nodes involved in the lymphatic drainage of large intestine of pig were colic caecal, anorectal , lumbar aortic, renal , medial lumbar and lateral lumbar lymph nodes. Again, except the right and left lumbar duct, one minor lymphatic trunk was observed parallel to the rectum, draining the lymph from anorecral lymph node to caudal mesenteric lymph node and then to renal lymph node. The celiac trunk and the jejunal trunk joined and formed a common trunk which was again joined by the colic trunk that finally opened into the caudal aspect of cysternachyli.

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Gayakwad, Pratibha, Seema Giri, and Gauri P. Patange. "Indralupta (alopecia areata) Kshudraroga management in Sushruta Samhita and Alopathy." National Journal of Research in Ayurved Science 6, no. 5th (2018). http://dx.doi.org/10.52482/ayurlog.v6i5th.189.

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The history of cosmetics extents at least 6000 years and is present in almost every society all over the world. In todayâ€™s era people are suffering from stress and strain due to the hustle and bustle of urban lifestyle. This has succumbed them to various lifestyle disorder.. Due to which itâ€™s effects are seen on the body and out of which hair is affected the most. Sushruta has mentioned about Khalitya. It is caused by vitiation of vata and pitta doshas. In Indralupta there will be vitiation of rakta with kapha which obstruct the hair follicle. sushruta had said that the drushti and the lomkupaa never grow throughtout lifetime but hairs and nail do. In chikitsasthana the treatment for Indralupta. The bald paer or seat should be anointed and fomented, and then bleeding (by venesection) should be resorted to, after which a plaster composed of Manahsila, Kasisa, Tuttha and Maricha, or of Kutannata and Devadaru pasted tighter, should be applied to it. Alopecia areata also known as spot baldness, is a state in which hair is lost from some or all areas of the body. Typical symptoms of alopecia areata are small bald patches, underlying skin is unscarred and looks superficially normal. Patients also tend to have a slightly higher incidence of condition related to the immune system, such as asthama, allergies atopic dermatitis, and hypothyroidism. It occurs at any age. Hair loss area may tingle or painful. Due to autoimmunity, colic disease, endogenous retinoids metabolic defect alopecia areata occur..

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