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Journal articles on the topic 'Modelo do torpedo'

Author: Grafiati

Published: 10 September 2021

Last updated: 29 July 2025

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1

Revestido Herrero, Elías, Francisco J. Velasco, Luis M. Vega, and Francisco J. Lastra. "Estimación Eficiente de Parámetros y Control en Base a un Sistema de Guía LOS Modificado de un Vehículo Subacuático." Revista Iberoamericana de Automática e Informática industrial 15, no. 1 (2017): 58. http://dx.doi.org/10.4995/riai.2017.8826.

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<p>En este trabajo, se propone una metodología para la mejora de la eficiencia en la estimación de parámetros de un modelo de maniobra no lineal de un vehículo subacuático no tripulado con forma de torpedo. Para este cometido, se dispone de datos de diferentes ensayos, llevados a cabo con el citado vehículo en las instalaciones del Canal de Experiencias Hidrodinámicas del Pardo, Madrid. En la metodología propuesta, se tiene en cuenta los siguientes aspectos para mejorar la eficiencia en la estimación de los parámetros: selección del periodo de muestreo, suavizado de los datos adquiridos

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Ramos-Ordoñez, María Felix, María Del Coro Arizmendi, Valeria Flores-Enríquez, and Judith Márquez-Guzmán. "Extracción y morfología del embrión de Bursera bipinnata (Burseraceae)." Acta Botanica Mexicana, no. 117 (October 24, 2016): 27. http://dx.doi.org/10.21829/abm117.2016.1165.

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Antecedentes y Objetivos: El entendimiento de la biología reproductiva de las plantas, desde la formación de la semilla hasta su establecimiento, permite el desarrollo de diferentes estrategias de conservación. En el género Bursera, cuyo principal centro de diversificación es México, la diáspora es un pireno formado por un endocarpo fuertemente lignificado que encierra a la semilla. Las características anatómicas del pireno y la partenocarpia son los principales factores que han obstaculizado el estudio de la embriogénesis y el desarrollo de técnicas de propagación. En este trabajo se describe

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Kim, Min-Jae, Seon-Hong Kim, Kurn-Chul Lee, Bu-Geun Paik, and Moon-Chan Kim. "Cavitator Design for Straight-Running Supercavitating Torpedoes." Applied Sciences 11, no. 14 (2021): 6247. http://dx.doi.org/10.3390/app11146247.

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A practical cavitator design method for straight-running-type supercavitating torpedoes was developed in this paper. Design requirements were first drawn in terms of torpedo performance characteristics, such as maximum range and motion stability. This method determines the optimum cavitator satisfying the design requirements that not only minimize the total drag of the torpedo, extending the maximum range, but also provide hydrodynamic forces required for straight level flight. The design procedure includes determining a design cavitation number and cavitator type (disk or cone) for obtaining

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Yemelyanov, Vitaliy A., Anton A. Zhilenkov, Sergei G. Chernyi, Anton Zinchenko, and Elena Zinchenko. "The Mathematical Models of the Operation Process for Critical Production Facilities Using Advanced Technologies." Inventions 7, no. 1 (2021): 8. http://dx.doi.org/10.3390/inventions7010008.

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The paper presents data on the problems of monitoring and diagnosing the technical conditions of critical production facilities, such as torpedo ladle cars, steel ladles. The accidents with critical production facilities, such as torpedo ladle cars, lead to losses and different types of damages in the metallurgical industry. The paper substantiates the need for a mathematical study of the operation process of the noted critical production facilities. A Markovian graph has been built that describes the states of torpedo ladle cars during their operation. A mathematical model is presented that a

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Zhang, B., Y. Fu, M. H. Zhang, and H. Wang. "Hydrodynamic and bearing behaviors of two typical deepwater dynamically installed anchors: torpedo anchor and fish anchor." IOP Conference Series: Earth and Environmental Science 1332, no. 1 (2024): 012022. http://dx.doi.org/10.1088/1755-1315/1332/1/012022.

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Abstract Dynamically installed anchors, such as torpedo and fish anchors, are innovative and cost-effective anchorage foundations. In this study, the advantages and disadvantages of these two types of dynamically installed anchors are discussed by comparing the hydrodynamic and bearing characteristics of torpedo and fish anchors commonly used in practical engineering. First, based on OpenFOAM, 3D numerical models were established to investigate the directional stability and simulate the underwater free-fall process of anchors using static and dynamic model analysis methods. Using the validated

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Seo, Kyung-Min, Hae Sang Song, Se Jung Kwon, and Tag Gon Kim. "Measurement of Effectiveness for an Anti-torpedo Combat System Using a Discrete Event Systems Specification-based Underwater Warfare Simulator." Journal of Defense Modeling and Simulation: Applications, Methodology, Technology 8, no. 3 (2011): 157–71. http://dx.doi.org/10.1177/1548512910390245.

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Modeling and simulation (M&S) has long played an important role in developing tactics and evaluating the measure of effectiveness (MOE) for the underwater warfare system. In simulation-based acquisition, M&S technology facilitates decisions about future equipment procurements, such as a mobile decoy or a torpedo. In addition, assessment of submarine tactical development, during an engagement against a torpedo, can be conducted using M&S techniques. This paper presents a case study that applies discrete event systems specification-based M&S technology to develop a simulation of

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Iliescu, Nicolae, and Costică Atanasiu. "Experimental Investigations on the Stress State in the Bearing Structure of a Special Wagon to Transport Liquid Iron." International conference KNOWLEDGE-BASED ORGANIZATION 23, no. 3 (2017): 180–87. http://dx.doi.org/10.1515/kbo-2017-0174.

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Abstract In order to increase productivity, to reduce energy consumption and for environmental protection, a special wagon intended for the transport of liquid pig iron, in steel mills, it was designed and manufactured. This wagon consists of an especial chamotted torpedo, with a capacity of 300 tons, rested, at each end, by means of a box beam, on two buggies, with four axles each one. To evaluate the mechanical behavior of this wagon during service, its prototype was investigated experimentally in terms of the stress and strain state. Due to difficulties encountered related to the long durat

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Menghi, Claudio, Alessandro Maria Rizzi, Anna Bernasconi, and Paola Spoletini. "TOrPEDO: witnessing model correctness with topological proofs." Formal Aspects of Computing 33, no. 6 (2021): 1039–66. http://dx.doi.org/10.1007/s00165-021-00564-1.

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AbstractModel design is not a linear, one-shot process. It proceeds through refinements and revisions. To effectively support developers in generating model refinements and revisions, it is desirable to have some automated support to verify evolvable models. To address this problem, we recently proposed to adopt topological proofs, which are slices of the original model that witness property satisfaction. We implemented , a framework that provides automated support for using topological proofs during model design. Our results showed that topological proofs are significantly smaller than the or

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Sagrilo, Luís V. S., José Renato M. de Sousa, Edison C. P. Lima, Elisabeth C. Porto, and Jane V. V. Fernandes. "A Study on the Holding Capacity Safety Factors for Torpedo Anchors." Journal of Applied Mathematics 2012 (2012): 1–18. http://dx.doi.org/10.1155/2012/102618.

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The use of powerful numerical tools based on the finite-element method has been improving the prediction of the holding capacity of fixed anchors employed by the offshore oil industry. One of the main achievements of these tools is the reduction of the uncertainty related to the holding capacity calculation of these anchors. Therefore, it is also possible to reduce the values of the associated design safety factors, which have been calibrated relying on models with higher uncertainty, without impairing the original level of structural safety. This paper presents a study on the calibration of r

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K, Sudheendra Prabhu, and Srinivas G. "Hydrodynamic Performance Enhancement of Torpedo-Shaped Underwater Gliders Using Numerical Techniques." F1000Research 13 (October 24, 2024): 1274. http://dx.doi.org/10.12688/f1000research.154040.1.

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Background Underwater gliders are widely used in marine applications for monitoring purposes. These gliders must withstand hydrodynamic forces and maintain its body stability. The underwater environments are highly unpredictable, and small changes in the environment can lead to significant instability in underwater vehicles. Methods This study uses different numerical techniques to investigate the hydrodynamic characteristics of a torpedo-shaped glider. A symmetric torpedo-shaped glider model was created and analyzed using a licensed version of ANSYS 20.1 Fluent tool. The behavior of the torpe

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K, Sudheendra Prabhu, and Srinivas G. "Hydrodynamic Performance Enhancement of Torpedo-Shaped Underwater Gliders Using Numerical Techniques." F1000Research 13 (April 23, 2025): 1274. https://doi.org/10.12688/f1000research.154040.2.

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Background Underwater gliders are widely used in marine applications for monitoring purposes. These gliders must withstand hydrodynamic forces and maintain its body stability. The underwater environments are highly unpredictable, and small changes in the environment can lead to significant instability in underwater vehicles. Methods This study uses different numerical techniques to investigate the hydrodynamic characteristics of a torpedo-shaped glider. A symmetric torpedo-shaped glider model was created and analyzed using a licensed version of ANSYS 20.1 Fluent tool. The behavior of the torpe

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Scacco, Umberto, Fabiana Zanardi, Silvio Kroha, Emanuele Mancini, Francesco Tiralongo, and Giuseppe Nascetti. "Age Readings and Assessment in Coastal Batoid Elasmobranchs from Small-Scale Size-Selective Fishery: The Importance of Data Comparability in Multi-Specific Assemblages." Diversity 16, no. 5 (2024): 271. http://dx.doi.org/10.3390/d16050271.

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The large variation in vertebral shape and calcification observed among elasmobranch species prevents using a single method for enhancing growth bands and reading age. Further, estimating age and growth parameters can be difficult or impractical when samples are incomplete due to the bycatch of a size-selective fishery. Using a single and rapid method, age readings were obtained on the vertebrae of four batoid species, namely 53 individuals of Dasyatis pastinaca, 51 of Raja asterias, 15 of Torpedo marmorata, and 55 specimens of Torpedo torpedo, from the local small-scale trammel net fishery in

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Rudenko, Serhii, and Kateryna Prokudina. "Alfred Barr's Chronological Concept in the Context of Creating a Potential Collection of the Ukrainian Museum of Modern Art." Issues in Cultural Studies, no. 40 (December 21, 2022): 276–93. https://doi.org/10.31866/2410-1311.40.2022.269385.

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The purpose of the article is to verify the utilitarianism of Alfred Barr’s concept of the chronological frames of museumification of modern art for the formation of a potential collection of the Ukrainian Museum of Modern Art. Research methodology. The following methods are used: skeptical empiricism, extrapolation, deductive logic, and scientific criticism. Scientific novelty. The article is the first attempt to adapt the MoMA’s conceptual experience to solving the problem of defining the chronological frames of a potential collection of the Ukrainian Museum of Modern Art. Despit

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Kim, Wooshik, Myoungin Shin, Jisung Park, and Ho Seuk Bae. "A Simulator Development of Surface Warship Torpedo Defense System considering Bubble-Generating Wake Decoy." Journal of the Korea Institute of Military Science and Technology 27, no. 3 (2024): 416–27. http://dx.doi.org/10.9766/kimst.2024.27.3.416.

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The wake-homing underwater guided weapon that detects and tracks wake generated during voyage of a surface ship is impossible to avoid with the present acoustic deception torpedo defense system. Therefore, research on bubble-generating wake decoy is necessary to deceive wake-homing underwater guided weapon. Experiments in various environments are required to verify the effective operation method and performance of the wake decoy, but performance verification through underwater experiment is limited. In this paper, we develop a simulator for an torpedo defense system of surface ship, which is a

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JIANG, Zhe, Xiaoxuan TANG, Peixuan LI, and Haiyan WANG. "Torpedo electromagnetic fuze active interference recognition based on improved AlexNet." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 43, no. 1 (2025): 66–75. https://doi.org/10.1051/jnwpu/20254310066.

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In order to enhance the active interference signal recognition capability of the electromagnetic fuze of a torpedo in the marine electromagnetic environment, a method for recognizing the electromagnetic fuze's active interference based on the improved AlexNet is proposed. Interference signal models and marine electromagnetic wave channel models are established. The time-frequency plots of interference signals propagated through the marine electromagnetic wave channel are extracted into datasets. The trained network model is improved by optimizing the network structure, adding data labels and a

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Vassilyev, S. N., A. A. Galyaev, V. V. Zaletin, K. S. Kulakov, M. V. Silnikov, and E. I. Yakushenko. "Joint Use of Mechatronic Systems to Organize Effective Counteraction to the Coordinated Action of Enemy Torpedoes." Mekhatronika, Avtomatizatsiya, Upravlenie 23, no. 4 (2022): 197–208. http://dx.doi.org/10.17587/mau.23.197-208.

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The article proposes an approach to the organization of counteraction to the probable enemy on the basis of the joint use of mechatronic devices using the phenomenon of electric explosion to counteract homing systems and solving a group control task in order to protect the target from defeat. The above class of tasks involves the use by the attacked of mechatronic devices that play the role of mobile defenders, in the quality of which can act as a self-propelled source of interference, distracting the attacking object (missile or torpedo) by intercepting it, and a shock RTK aimed at destroying

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Jeong Hee Hong, Kyung Min Seo, Moon Gi Seok, and Tag Gon Kim. "Interoperation between Engagement-and Engineering-level Models for Effectiveness Analyses." Journal of Defense Modeling and Simulation: Applications, Methodology, Technology 8, no. 3 (2011): 143–55. http://dx.doi.org/10.1177/1548512910389483.

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System effectiveness analyses are a longstanding challenge in defense modeling and simulation. While some techniques are accomplished through using an engagement-level model alone with given parameterized weapon performance data, this approach is prone to errors because of insufficient behavior information from the weapon systems. In order to overcome these limitations, engagement-level models should be supported by engineering-level models representing the detailed behavior of weapons. Hence, this paper proposes an interoperation approach between the engagement and engineering-level models. O

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Zhang, Ling, Pu Kai Wang, Yu Cai Dong, Min Lin, Liang Hai Yi, and Ge Hua Fan. "Synthetic Evaluation of Warfare Capability of Submarine Launched Torpedoes Based on Projection Pursuit Model." Advanced Materials Research 490-495 (March 2012): 2956–60. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.2956.

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Projection Pursuit method invert a number of evaluating indicator into a one-dimensional projection values by the best projection direction, to avoid anthropogenic interference with the expert scoring factors. Application of projection pursuit method for three models of the submarine launched torpedoes capability to conduct a comprehensive evaluation, the best projection direction of the evaluation indicator is got, and a synthetic comprehensive evaluation order of the models is obtained. These supply scientific budget for the operational use , improvements and development of torpedoes.

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M., TANER. "Designing Unmanned Underwater Vehicles through Biomimicry." Scientific Bulletin of Naval Academy XXIV, no. 1 (2021): 61–73. http://dx.doi.org/10.21279/1454-864x-21-i1-007.

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Research vessels or small craft equipped for the specific purposes lead geological, geophysical and oceanographic research both at the coastal and offshore areas for constructing and surveying the engineering projects such as offshore structures, undersea pipelines, harbours, oil and natural gas extraction plants from resources etc., which require extensive labourship. However, this research method applied entails very high costs and can also include risks for occupational safety and property due to the harsh weather conditions at sea. In addition, high precision measurements cannot always fun

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Bertaccini, Edward J., Ozge Yoluk, Erik R. Lindahl та James R. Trudell. "Assessment of Homology Templates and an Anesthetic Binding Site within the γ-Aminobutyric Acid Receptor". Anesthesiology 119, № 5 (2013): 1087–95. http://dx.doi.org/10.1097/aln.0b013e31829e47e3.

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Abstract Background: Anesthetics mediate portions of their activity via modulation of the γ-aminobutyric acid receptor (GABAaR). Although its molecular structure remains unknown, significant progress has been made toward understanding its interactions with anesthetics via molecular modeling. Methods: The structure of the torpedo acetylcholine receptor (nAChRα), the structures of the α4 and β2 subunits of the human nAChR, the structures of the eukaryotic glutamate-gated chloride channel (GluCl), and the prokaryotic pH-sensing channels, from Gloeobacter violaceus and Erwinia chrysanthemi, were a

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Tran, Minh, Jonathan Binns, Shuhong Chai, Alexander L. Forrest, and Hung Nguyen. "A practical approach to the dynamic modelling of an underwater vehicle propeller in all four quadrants of operation." Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment 233, no. 1 (2017): 333–44. http://dx.doi.org/10.1177/1475090217744906.

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This article presents the open water propeller characteristics and the four-quadrant propeller models as applied to a torpedo-shaped underwater vehicle. A series of experiments with a Gavia autonomous underwater vehicle propeller were conducted in the towing tank using a rotor testing apparatus. The purpose of these tests was to measure the propeller thrust and torque under varying flow conditions and then to be used as the basis of the developed propeller models. These mathematical models were constructed using two regression models, a polynomial and a Fourier series. Model coefficients were

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Chen, Jie, JingYin Li, ShuangXi Li, and YunXiang You. "Implementation of Black Box Models for Internal Ballistics Optimization Using an Artificial Neural Network." Mathematical Problems in Engineering 2018 (October 15, 2018): 1–10. http://dx.doi.org/10.1155/2018/1039163.

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The process of UUV delivery is a typical nonlinear transient dynamic phenomenon, which is generally described by the internal ballistic model. Evaluation of optimal internal ballistics parameters is a key step for promoting ballistic weapon performance under given launch constraints. Hence, accurate and efficient optimization techniques are required in ballistics technology. In this study, an artificial neural network (ANN) is used to simplify the process of regression analysis. To this end, an internal ballistics model is built in this study as a black box for a classic underwater launching s

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García Peláez, Javier, and Isabel Ainhoa Nieto Sevilla. "Estela térmica en narco-semi-sumergibles y otros efectos vórtice." Revista Científica General José María Córdova 11, no. 11 (2013): 141. http://dx.doi.org/10.21830/19006586.208.

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Una década y media de estudios experimentales y teóricos sobre la dinámica y las interacciones de las estructuras de vórtices en fluidos estratificados han sido desarrollados por Sergey I. Voropayev (PhD) y otros colaboradores, con el fin de proporcionar un conjunto consistente y publicable de modelos matemáticos y numéricos sobre las interacciones de las estructuras vórtice, las cuales tienen gran interés civil y militar. Para el diseño de submarinos, esta iniciativa proporciona un marco racional para el diseño de su furtividad en contra de los torpedos tipo wake-homing. Para las fuerzas fron

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Mineev, Konstantin S., Elena V. Kryukova, Igor E. Kasheverov, et al. "Spatial Structure and Activity of Synthetic Fragments of Lynx1 and of Nicotinic Receptor Loop C Models." Biomolecules 11, no. 1 (2020): 1. http://dx.doi.org/10.3390/biom11010001.

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Lynx1, membrane-bound protein co-localized with the nicotinic acetylcholine receptors (nAChRs) and regulates their function, is a three-finger protein (TFP) made of three β-structural loops, similarly to snake venom α-neurotoxin TFPs. Since the central loop II of α-neurotoxins is involved in binding to nAChRs, we have recently synthesized the fragments of Lynx1 central loop, including those with the disulfide between Cys residues introduced at N- and C-termini, some of them inhibiting muscle-type nAChR similarly to the whole-size water-soluble Lynx1 (ws-Lynx1). Literature shows that the main f

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Bernabé Blach, Federico, and Leandro Giri. "It’s a Male World: el sesgo sexual de los modelos animales en biología." Arbor 195, no. 791 (2019): 492. http://dx.doi.org/10.3989/arbor.2019.791n1005.

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En el presente trabajo se analizan desde un punto de vista metateórico los modelos animales y su uso en la investigación en el ámbito de las ciencias de la vida. A partir de la evaluación de una nutrida literatura científica que denuncia un sesgo sexual en las prácticas de investigación que utilizan dichos modelos, se buscan los supuestos teóricos implícitos que les dan fundamento y se argumenta que lejos de suponer una torpeza metodológica forman parte de una extensa tradición ubicua en la historia de la biología. Por otra parte, se exponen los motivos teóricos para el reemplazo de los mencio

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Diedrich, Victoria, Elena Haugg, Carola Dreier, and Annika Herwig. "What can seasonal models teach us about energy balance?" Journal of Endocrinology 244, no. 2 (2020): R17—R32. http://dx.doi.org/10.1530/joe-19-0502.

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Torpid states are used by many endotherms to save energy during winter. During torpor, metabolic rate is downregulated to fractions of resting metabolic rate and often associated with a severe drop in body temperature that challenges mammalian physiology. Understanding the mechanisms regulating this extreme depression of metabolism bears enormous potential for biomedical research. Torpor behavior has been extensively studied in the Djungarian hamster, also known as Siberian hamster. It is dependent on many preparatory adaptations of physiological and endocrine systems that are likely to be int

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Flan, Goualo Lazare. "Avatares de la implementación del modelo étnico-cultural de nación en la construcción identitaria en África subsahariana: un estudio de caso." Revista humanidades 13, no. 2 (2023): e53887. http://dx.doi.org/10.15517/h.v13i2.53887.

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El texto analiza las limitaciones de la implementación del modelo étnico-cultural de nación en la construcción identitaria en África subsahariana a partir del caso de Costa de Marfil. Constituye una indagación de corte cualitativo que recurre al método de estudios de caso, que se sustenta en la investigación documental y la entrevista en profundidad para la recolección de datos, así como en la inducción y el análisis del discurso para la interpretación de la información. La investigación resalta que ha sido problemática la cuestión identitaria en la construcción del Estado marfileño en particu

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Meinhardt, Hans. "Models for positional signalling with application to the dorsoventral patterning of insects and segregation into different cell types." Development 107, Supplement (1989): 169–80. http://dx.doi.org/10.1242/dev.107.supplement.169.

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Models of pattern formation and possible molecular realizations are discussed and compared with recent experimental observations. In application to the dorsoventral patterning of insects, it is shown that a superposition of two pattern-forming reactions is required. The first system generates the overall dorsoventral polarity of the oocyte, the second generates the positional information proper with a stripe-like region of high concentration along the ventral side of the embryo. A single reaction would be insufficient since the two reactions require different parameters. The model accounts for

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Canales-Lacruz, Inma, and Alicia Martinez-Mañero. "La ineficacia motriz en la educación física: perspectiva femenina (Motor Inefficacy in Physical Education: Female perspective)." Retos, no. 33 (September 15, 2017): 81–84. http://dx.doi.org/10.47197/retos.v0i33.53657.

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Este artículo examina la insatisfacción percibida por el alumnado de educación física. Se realizó un análisis de contenido de los informes elaborados por 33 mujeres de 22,24 de media de edad, todas ellas alumnas de la asignatura educación física en educación infantil del grado de maestro de educación infantil de la facultad de educación de la universidad de Zaragoza –España–. En los informes las estudiantes relataban sus experiencias rememoradas de la educación física escolar. El tratamiento de la información se realizó con el software Nvivo 10. Los resultados muestran la insatisfacción que pr

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Liang, Xifeng, Zhangjun Luo, Xiaobai Li, Xiaohui Xiong, and Xin Zhang. "Drag reduction of high-speed trains via low-density gas injection." AIP Advances 12, no. 6 (2022): 065115. http://dx.doi.org/10.1063/5.0089141.

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Aerodynamic drag reduction is crucial for the development of high-speed trains. This study considers the principle of supercavitation torpedo drag reduction and conducts wind tunnel tests and improved delayed detached eddy simulation numerical simulations to develop a drag reduction technique using low-density gas injection on the surface of a high-speed train. Models for jetting gases with different densities on the surface of the high-speed train were employed, and the aerodynamic drag, frictional resistance, pressure resistance, and flow field structure were compared and analyzed. The resul

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Gutarra, Susana, Benjamin C. Moon, Imran A. Rahman, et al. "Effects of body plan evolution on the hydrodynamic drag and energy requirements of swimming in ichthyosaurs." Proceedings of the Royal Society B: Biological Sciences 286, no. 1898 (2019): 20182786. http://dx.doi.org/10.1098/rspb.2018.2786.

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Ichthyosaurs are an extinct group of fully marine tetrapods that were well adapted to aquatic locomotion. During their approximately 160 Myr existence, they evolved from elongate and serpentine forms into stockier, fish-like animals, convergent with sharks and dolphins. Here, we use computational fluid dynamics (CFD) to quantify the impact of this transition on the energy demands of ichthyosaur swimming for the first time. We run computational simulations of water flow using three-dimensional digital models of nine ichthyosaurs and an extant functional analogue, a bottlenose dolphin, providing

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Raju, Raghavan, Wen-Zhi Zhan, Peter Karachunski, Bianca Conti-Fine, Gary C. Sieck, and Chella David. "Polymorphism at the HLA-DQ Locus Determines Susceptibility to Experimental Autoimmune Myasthenia Gravis." Journal of Immunology 160, no. 9 (1998): 4169–74. http://dx.doi.org/10.4049/jimmunol.160.9.4169.

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Abstract Studies in myasthenia gravis (MG) patients demonstrate that polymorphism at the HLA-DQ locus influences the development of MG. Several studies using the mouse models also demonstrate the influence of class II molecules, especially the H2-A, which is the mouse homologue of HLA-DQ, in experimental autoimmune myasthenia gravis (EAMG). We used transgenic mice expressing two different DQ molecules, DQ8 (DQA1*0301/B1*0302) and DQ6 (DQA1*0103/B1*0601), to evaluate the role of HLA-DQ genes in MG. These mice do not express endogenous mouse class II molecules since they contain the mutant H2-Aβ

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Wang, Tianlei, Zhenxing Sun, Yun Ke, Chaochao Li, and Jiwei Hu. "Two-Step Adaptive Control for Planar Type Docking of Autonomous Underwater Vehicle." Mathematics 11, no. 16 (2023): 3467. http://dx.doi.org/10.3390/math11163467.

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Planar type docking enables a convenient underwater energy supply for irregularly shaped autonomous underwater vehicles (AUVs), but the corresponding control method is still challenging. Conventional control methods for torpedo-shaped AUVs are not suitable for planar type docking due to the significant differences in system structures and motion characteristics. This paper proposes a two-step adaptive control method to solve the planar type docking problem. The method makes a seamless combination of horizontal dynamic positioning and visual servo docking considering ocean current disturbance.

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Rao, V. Bhujanga. "Selection of a Suitable Wall Pressure Spectrum Model for Estimating Flow-Induced Noise in Sonar Applications." Shock and Vibration 2, no. 5 (1995): 403–12. http://dx.doi.org/10.1155/1995/720535.

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Flow-induced structural noise of a sonar dome in which the sonar transducer is housed, constitutes a major source of self-noise above a certain speed of the vessel. Excitation of the sonar dome structure by random pressure fluctuations in turbulent boundary layer flow leads to acoustic radiation into the interior of the dome. This acoustic radiation is termed flow-induced structural noise. Such noise contributes significantly to sonar self-noise of submerged vessels cruising at high speed and plays an important role in surface ships, torpedos, and towed sonars as well. Various turbulent bounda

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35

Geiser, Fritz. "Metabolic Rate and Body Temperature Reduction During Hibernation and Daily Torpor." Annual Review of Physiology 66, no. 1 (2004): 239–74. https://doi.org/10.5281/zenodo.13525796.

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(Uploaded by Plazi for the Bat Literature Project) Although it is well established that during periods of torpor heterothermic mammals and birds can reduce metabolic rates (MR) substantially, the mechanisms causing the reduction of MR remain a controversial subject. The comparative analysis provided here suggests that MR reduction depends on patterns of torpor used, the state of torpor, and body mass. Daily heterotherms, which are species that enter daily torpor exclusively, appear to rely mostly on the fall of body temperature (Tb) for MR reduction, perhaps with the exception of very small sp

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36

Geiser, Fritz. "Metabolic Rate and Body Temperature Reduction During Hibernation and Daily Torpor." Annual Review of Physiology 66, no. 1 (2004): 239–74. https://doi.org/10.5281/zenodo.13525796.

Full text

Abstract:

(Uploaded by Plazi for the Bat Literature Project) Although it is well established that during periods of torpor heterothermic mammals and birds can reduce metabolic rates (MR) substantially, the mechanisms causing the reduction of MR remain a controversial subject. The comparative analysis provided here suggests that MR reduction depends on patterns of torpor used, the state of torpor, and body mass. Daily heterotherms, which are species that enter daily torpor exclusively, appear to rely mostly on the fall of body temperature (Tb) for MR reduction, perhaps with the exception of very small sp

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37

Geiser, Fritz. "Metabolic Rate and Body Temperature Reduction During Hibernation and Daily Torpor." Annual Review of Physiology 66, no. 1 (2004): 239–74. https://doi.org/10.5281/zenodo.13525796.

Full text

Abstract:

(Uploaded by Plazi for the Bat Literature Project) Although it is well established that during periods of torpor heterothermic mammals and birds can reduce metabolic rates (MR) substantially, the mechanisms causing the reduction of MR remain a controversial subject. The comparative analysis provided here suggests that MR reduction depends on patterns of torpor used, the state of torpor, and body mass. Daily heterotherms, which are species that enter daily torpor exclusively, appear to rely mostly on the fall of body temperature (Tb) for MR reduction, perhaps with the exception of very small sp

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38

Geiser, Fritz. "Metabolic Rate and Body Temperature Reduction During Hibernation and Daily Torpor." Annual Review of Physiology 66, no. 1 (2004): 239–74. https://doi.org/10.5281/zenodo.13525796.

Full text

Abstract:

(Uploaded by Plazi for the Bat Literature Project) Although it is well established that during periods of torpor heterothermic mammals and birds can reduce metabolic rates (MR) substantially, the mechanisms causing the reduction of MR remain a controversial subject. The comparative analysis provided here suggests that MR reduction depends on patterns of torpor used, the state of torpor, and body mass. Daily heterotherms, which are species that enter daily torpor exclusively, appear to rely mostly on the fall of body temperature (Tb) for MR reduction, perhaps with the exception of very small sp

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39

Leite, João Alberto Machado, and Sérgio Tibana. "Physical modeling of thermal improvement in normally consolidated and overconsolidated soil." Soils and Rocks 45, no. 1 (2022): 1–7. http://dx.doi.org/10.28927/sr.2022.076421.

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Knowledge of the soil-temperature relation and its peculiarities have been widely discussed in Geotechnics. Previous studies show that heated fine-grained soil induces pore pressure, and as a result, the soil exhibits a consolidation effect similar to that of conventional consolidation when pore pressure is dissipated. The outcome of this process depends on soil characteristics such as the overconsolidation ratio and plasticity. Consolidated soil typically induces positive pore pressure while overconsolidated one induces negative pore pressure when heated. The phenomenon described was explored

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40

Kinsey, James C., Maurice A. Tivey, and Dana R. Yoerger. "Dynamics and navigation of autonomous underwater vehicles for submarine gravity surveying." GEOPHYSICS 78, no. 3 (2013): G55—G68. http://dx.doi.org/10.1190/geo2012-0181.1.

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We investigated the effect of autonomous underwater vehicle (AUV) dynamics and navigation on underway submarine gravimetry. Our research was motivated by the need to obtain spatially dense marine gravity measurements close to the source of subkilometer-scale geologic features in the shallow oceanic crust. Such measurements have been previously obtained, for instance, with piloted submarines and towed sleds; however, the high cost and, in the case of on-bottom measurements, poor spatial sampling preclude routine acquisition of these measurements. Continuous underway gravity surveys with AUVs is

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41

Kumar, Pramod, Yuhang Wang, Zhening Zhang, et al. "Cryo-EM structures of a lipid-sensitive pentameric ligand-gated ion channel embedded in a phosphatidylcholine-only bilayer." Proceedings of the National Academy of Sciences 117, no. 3 (2020): 1788–98. http://dx.doi.org/10.1073/pnas.1906823117.

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The lipid dependence of the nicotinic acetylcholine receptor from the Torpedo electric organ has long been recognized, and one of the most consistent experimental observations is that, when reconstituted in membranes formed by zwitterionic phospholipids alone, exposure to agonist fails to elicit ion-flux activity. More recently, it has been suggested that the bacterial homolog ELIC (Erwinia chrysanthemi ligand-gated ion channel) has a similar lipid sensitivity. As a first step toward the elucidation of the structural basis of this phenomenon, we solved the structures of ELIC embedded in palmit

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42

Gradogna, Antonella, Cristina Fenollar-Ferrer, Lucy R. Forrest, and Michael Pusch. "Dissecting a regulatory calcium-binding site of CLC-K kidney chloride channels." Journal of General Physiology 140, no. 6 (2012): 681–96. http://dx.doi.org/10.1085/jgp.201210878.

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The kidney and inner ear CLC-K chloride channels, which are involved in salt absorption and endolymph production, are regulated by extracellular Ca2+ in the millimolar concentration range. Recently, Gradogna et al. (2010. J. Gen. Physiol. http://dx.doi.org/10.1085/jgp.201010455) identified a pair of acidic residues (E261 and D278) located in the loop between helices I and J as forming a putative intersubunit Ca2+-binding site in hClC-Ka. In this study, we sought to explore the properties of the binding site in more detail. First, we verified that the site is conserved in hClC-Kb and rClC-K1. I

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43

Perez-Lloret, Santiago, Guenson Chevalier, Sofia Bordet, et al. "The Genetic Basis of Probable REM Sleep Behavior Disorder in Parkinson’s Disease." Brain Sciences 13, no. 8 (2023): 1146. http://dx.doi.org/10.3390/brainsci13081146.

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Patients with Parkinson’s Disease (PD) experience REM sleep behavior disorder (RBD) more frequently than healthy controls. RBD is associated with torpid disease evolution. To test the hypothesis that differential genetic signatures might contribute to the torpid disease evolution in PD patients with RBD we compared the rate of genetic mutations in PD patients with or without probable RBD. Patients with a clinical diagnosis of PD in the Parkinson’s Progression Markers Initiative (PPMI) database entered the study. We excluded those with missing data, dementia, psychiatric conditions, or a diagno

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Johnson, Joseph S., and Michael J. Lacki. "Effects of reproductive condition, roost microclimate, and weather patterns on summer torpor use by a vespertilionid bat." Ecology and Evolution 4, no. 2 (2014): 157–66. https://doi.org/10.5281/zenodo.13452049.

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(Uploaded by Plazi for the Bat Literature Project) A growing number of mammal species are recognized as heterothermic, capable of maintaining a high-core body temperature or entering a state of metabolic suppression known as torpor. Small mammals can achieve large energetic savings when torpid, but they are also subject to ecological costs. Studying torpor use in an ecological and physiological context can help elucidate relative costs and benefits of torpor to different groups within a population. We measured skin temperatures of 46 adult Rafinesque's big-eared bats (Corynorhinus rafinesquii)

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45

Johnson, Joseph S., and Michael J. Lacki. "Effects of reproductive condition, roost microclimate, and weather patterns on summer torpor use by a vespertilionid bat." Ecology and Evolution 4, no. 2 (2014): 157–66. https://doi.org/10.5281/zenodo.13452049.

Full text

Abstract:

(Uploaded by Plazi for the Bat Literature Project) A growing number of mammal species are recognized as heterothermic, capable of maintaining a high-core body temperature or entering a state of metabolic suppression known as torpor. Small mammals can achieve large energetic savings when torpid, but they are also subject to ecological costs. Studying torpor use in an ecological and physiological context can help elucidate relative costs and benefits of torpor to different groups within a population. We measured skin temperatures of 46 adult Rafinesque's big-eared bats (Corynorhinus rafinesquii)

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46

Johnson, Joseph S., and Michael J. Lacki. "Effects of reproductive condition, roost microclimate, and weather patterns on summer torpor use by a vespertilionid bat." Ecology and Evolution 4, no. 2 (2014): 157–66. https://doi.org/10.5281/zenodo.13452049.

Full text

Abstract:

(Uploaded by Plazi for the Bat Literature Project) A growing number of mammal species are recognized as heterothermic, capable of maintaining a high-core body temperature or entering a state of metabolic suppression known as torpor. Small mammals can achieve large energetic savings when torpid, but they are also subject to ecological costs. Studying torpor use in an ecological and physiological context can help elucidate relative costs and benefits of torpor to different groups within a population. We measured skin temperatures of 46 adult Rafinesque's big-eared bats (Corynorhinus rafinesquii)

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47

Johnson, Joseph S., and Michael J. Lacki. "Effects of reproductive condition, roost microclimate, and weather patterns on summer torpor use by a vespertilionid bat." Ecology and Evolution 4, no. 2 (2014): 157–66. https://doi.org/10.5281/zenodo.13452049.

Full text

Abstract:

(Uploaded by Plazi for the Bat Literature Project) A growing number of mammal species are recognized as heterothermic, capable of maintaining a high-core body temperature or entering a state of metabolic suppression known as torpor. Small mammals can achieve large energetic savings when torpid, but they are also subject to ecological costs. Studying torpor use in an ecological and physiological context can help elucidate relative costs and benefits of torpor to different groups within a population. We measured skin temperatures of 46 adult Rafinesque's big-eared bats (Corynorhinus rafinesquii)

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48

Johnson, Joseph S., and Michael J. Lacki. "Effects of reproductive condition, roost microclimate, and weather patterns on summer torpor use by a vespertilionid bat." Ecology and Evolution 4, no. 2 (2014): 157–66. https://doi.org/10.5281/zenodo.13452049.

Full text

Abstract:

(Uploaded by Plazi for the Bat Literature Project) A growing number of mammal species are recognized as heterothermic, capable of maintaining a high-core body temperature or entering a state of metabolic suppression known as torpor. Small mammals can achieve large energetic savings when torpid, but they are also subject to ecological costs. Studying torpor use in an ecological and physiological context can help elucidate relative costs and benefits of torpor to different groups within a population. We measured skin temperatures of 46 adult Rafinesque's big-eared bats (Corynorhinus rafinesquii)

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49

Selva Sutter, Ernesto A. "Sistema de salud mixto neoliberal quizás abuso, engaño o torpeza, pero siempre privatización." ECA: Estudios Centroamericanos 59, no. 668 (2004): 549–79. http://dx.doi.org/10.51378/eca.v59i668.5350.

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Este artículo contiene una discusión sobre el contenido ideológico de la propuesta que favorece la combinación de lo público y lo privado en el sistema de salud. Tanto la postura que está a favor de esta combinación como la que la rechaza se fundamentan en un conjunto de creencias, explicaciones y expectativas acerca de la naturaleza del mundo, Asumen premisas que no constituyen hechos científicos, puesto que no han pasado la prueba de la comprobación, la cual discrimina entre hechos y posibilidades. Ahora bien, en qué proporción la ideología contribuye a la formulación de cada postulado o, di

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50

Bonaccorsi di Patti, Maria Carmela, Elisa Angiulli, Arianna Casini, Rosa Vaccaro, Carla Cioni, and Mattia Toni. "Synuclein Analysis in Adult Xenopus laevis." International Journal of Molecular Sciences 23, no. 11 (2022): 6058. http://dx.doi.org/10.3390/ijms23116058.

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The α-, β- and γ-synucleins are small soluble proteins expressed in the nervous system of mammals and evolutionary conserved in vertebrates. After being discovered in the cartilaginous fish Torpedo californica, synucleins have been sequenced in all vertebrates, showing differences in the number of genes and splicing isoforms in different taxa. Although α-, β- and γ-synucleins share high homology in the N-terminal sequence, suggesting their evolution from a common ancestor, the three isoforms also differ in molecular characteristics, expression levels and tissue distribution. Moreover, their fu

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