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Journal articles on the topic 'SPINNING HUB'

Author: Grafiati

Published: 11 September 2023

Last updated: 31 July 2025

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1

Zhong, Hao, Shengguan Qu, Wang Long, Rixin Deng, and Wenxue Zhou. "Numerical simulation of spinning forming of A356 aluminum alloy hub using dual spinning rollers." Journal of Physics: Conference Series 2720, no. 1 (2024): 012050. http://dx.doi.org/10.1088/1742-6596/2720/1/012050.

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Abstract A finite element model of one-pass forming of an A356 aluminum alloy hub using dual spinning rollers was established, and the effectiveness of the finite element model was verified through experiment. The established finite element model was used to study the influence of the feed rate, the spindle speed, the axial distance of the two spinning rollers, and the friction coefficient on the forming quality of the hub. The result shows that a good forming quality could be obtained when the feed rate is 4 mm/s, the spindle speed is 220 rpm, the axial distance between the two spinning rolle

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2

Zhang, Zheng, Yongting Lan, Haochuan Ding, and Yuanhang Xie. "On optimization of Spin-Forming Process Parameters for Magnesium Alloy Wheel Hub Based on Gray Relational Analysis." Materials 17, no. 4 (2024): 959. http://dx.doi.org/10.3390/ma17040959.

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To study the influencing factors of process parameters on the wall thickness deviation and internal warpage deviation of the workpiece in magnesium alloy wheel hub spin molding, a two-pass heterogeneous spin molding model is proposed. To ensure the accuracy of the simulation results, the stress–strain data of AZ31 magnesium alloy at different temperatures and different strain rates were obtained through tests. Wall thickness deviation and internal warp deviation after molding were used as evaluation indexes of workpiece molding quality. ABAQUS software facilitated the numerical simulation and

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3

Makhdum, Farrukh, Alastair Conway, and Paul Blackwell. "Experimental Investigation on Shape Evolution in Metal Forming Hybrid Process." Key Engineering Materials 716 (October 2016): 420–27. http://dx.doi.org/10.4028/www.scientific.net/kem.716.420.

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The feasibility of combining spinning, shear forming and flow forming processes has been demonstrated through manufacturing of a representative of a hub component using industrial scale hybrid-forming machine available at the Advanced Forming Research Centre (AFRC). The manufacturing cycle consisted of single to multiple passes of shear forming, spinning and flow forming. The research has proven that the spinning, shear forming and flow forming can be combined using a single machine with a single set of tooling and single process cycle. Circumferential and axial cracking was observed in initia

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JIANG, Bing-chun, Hao-wei ZHAI, Qing-hang WANG, Meng LI, Tong ZHANG, and Bin JIANG. "Dynamic recrystallization behavior and spinning texture formation mechanism of magnesium alloy wheel hub." Transactions of Nonferrous Metals Society of China 35, no. 6 (2025): 1787–802. https://doi.org/10.1016/s1003-6326(25)66783-5.

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5

Wang, Zhang Feng, Chi Xiang Ou, Meng Jun Wang, Bai Chen Chen, and Gang Xian Fan. "Mechanical Properties and Microstructure of A356-T6 Aluminum Alloy Wheel Hub Based on Casting-Spinning Process." Materials Science Forum 1036 (June 29, 2021): 3–10. http://dx.doi.org/10.4028/www.scientific.net/msf.1036.3.

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The mechanical properties and microstructure of the A356-T6 wheel hub based on low pressure die casting-hot flow forming process were analyzed by means of optical microscopy (OM), scanning electron microscopy (SEM) and tensile tests. Results showed that the size of the eutectic region and the morphology of the Si phase were the main factors affecting the mechanical properties and fracture morphology of the wheel hub. There was a uniform distribution of eutectic area and fine Si phase morphology in the microstructure of the upper rim and lower rim, moreover, the ultimate tensile strength and yi

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Ūdre, Sandra. "LATGALIAN VOCABULARY AND IDIOMS RELATED TO SPINNING." Via Latgalica, no. 7 (March 22, 2016): 125. http://dx.doi.org/10.17770/latg2015.7.1215.

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<em>Spinning (rotation) as a physical phenomenon is an interesting thing. Many archaic notions remain in the language of the dominating perceptions of physical phenomena. Specific studies associated with the Latgalian language have determined that the use of various Latgalian lexemes in contemporary texts creates problems with archaic semantics. These are practical questions for users of Latgalian (primarily writers): which synonym is more appropriate – „doncuot” or „dzyguot” (both meaning ‘to dance’)? Are these terms equivalent? Does the word „maule” (meaning ‘wheel hub’) have only one

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Sundaram, Maruthachalam, Mouttouvelou Anand, Jaganathan Chelladurai, et al. "Design and FEM Analysis of High-Torque Power Density Permanent Magnet Synchronous Motor (PMSM) for Two-Wheeler E-Vehicle Applications." International Transactions on Electrical Energy Systems 2022 (July 25, 2022): 1–14. http://dx.doi.org/10.1155/2022/1217250.

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Launch of electric vehicles have seen a substantial rise for the past few years in emerging economies like India. In countries like India, the growth and penetration of the electric vehicles in the Indian automotive industry specifically for the two-wheeler segments are driven by the demand surge where cost and motor metrics have a substantial deciding factor. The in-wheel hub-motor, which is the prime mover for the two wheelers, decides the comfort zone of the customer in various metrics such as efficiency, torque, speed range, charging, and hence the distance covered. This paper addresses th

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Zhou, Heng, Hui Li, Jing Liu, et al. "Study on Structure Design of Generator of Flood Discharge Tunnel with Level Swirling Flow." E3S Web of Conferences 276 (2021): 02013. http://dx.doi.org/10.1051/e3sconf/202127602013.

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Through the design of the Generator of the spillway tunnel, the safe operation efficiency of flood discharge tunnel with the level swirling flow is further improved. This paper takes the horizontal swirl spillway tunnel of Gongboxia Hydropower Station on the Yellow River as an example. First, the project hub facilities of the Gongboxia Hydropower Station are introduced. Moreover, the design of the gradient section and the spinning chamber section in the Generator is also studied. Based on the calculation scheme of structural mechanics, the internal force of the structure under various load com

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9

Usubamatov, R., and T. Zhumaev. "Inertial Forces Acting on a Propeller of Aircraft." Open Aerospace Engineering Journal 7, no. 1 (2018): 1–13. http://dx.doi.org/10.2174/1874146001807010001.

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Background:Aerospace vehicles use propellers with the different design that possess gyroscopic properties. Recent investigations in the area of gyroscope theory have demonstrated that the gyroscope properties are based on the action of the centrifugal, common inertial, and Coriolis forces of the distributed mass elements of the spinning rotor, as well as the change in the angular momentum.Objective:The combined action of the interrelated inertial forces on the propellers presents the interests for the design of the blades. The objective of the manuscript is the derivation of mathematical model

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10

Sharanraj, K., J. Lakshmipathi, D. Saravanakumar, et al. "Development of Modular Wheel for Bicycle Electricfication." Journal of Physics: Conference Series 2601, no. 1 (2023): 012042. http://dx.doi.org/10.1088/1742-6596/2601/1/012042.

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Abstract Our entire world is in the future. Technology has made our lives better throughout time. They use electric bicycles. Cycling is always more environmentally friendly than driving, but the E-bike has seen the most widespread adoption of green transportation during the decade. Just picture an electric bike replacing gasoline-powered scooters rather than a traditional bicycle. The paper focuses on the complete design of modular wheel for bicycle, which includes a hub motor, a customized battery pack, electrical components, and the structural elements. The entire assembly will be contained

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11

Perederiy, V. G., B. G. Gasanov, and A. A. Aganov. "Structurization and Properties of Magnetoplastics Made of Mechanically Activated Amorphous-Crystalline Powder Alloys Based on the Nd-Fe-B System." Solid State Phenomena 284 (October 2018): 455–59. http://dx.doi.org/10.4028/www.scientific.net/ssp.284.455.

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The influence of the method of melt spinning on the basis of the Fe-Nd-B system on the amorphous-crystal structure of ribbons and flakes is shown. It is established that the magnetic properties of magnetoplasts depend on the powders particle size, the parameters of mechanic activation during flake milling, the kinetics of formation and growth of Fe2Nd14B phase nuclei at all stages of their preparation and processing, etc. Isotropic and anisotropic magnetoplasts and sintered magnets with magnetic properties: Br = 0.5-1.25 T, HcB = 180-700 kA/m; (BH)max = 50-280 kJ/m3.

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12

Truong, Nguyen Xuan, and Nguyen Van Vuong. "Magnetic field assisted melt–spinning Nd-Fe-B ribbons and anisotropic bonded NdFeB magnets prepared thereof." Communications in Physics 26, no. 1 (2016): 59. http://dx.doi.org/10.15625/0868-3166/26/1/7686.

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The magnetic-field-assisted melt-spinning (FAMS) Nd10.5Fe72Co11B6.5 ribbons were spun in an external magnetic field of 3 kG. The prepared ribbons were ball-milled in xylene solvent for 30 minutes followed by adding in and mixing with the high-temperature binder HTB-1 (3 wt%) for further 10 minutes. The mixed powder was dried and in-mold aligned in a magnetic field of 18 kOe and hot-compacted at 200 oC. The parameters of the FAMS ribbon preparation, ball-milling process, hot-compaction and anisotropic bonded magnets’ fabrication were optimized leading to the magnet’s energy product (BH)max of 1

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13

Nagy, Roland, Réka Kothencz, Máté Hartyányi, and László Bartha. "Relationship between Some Colloidal Properties of Non-Ionic-Anionic Surfactant Mixtures." Processes 10, no. 6 (2022): 1136. http://dx.doi.org/10.3390/pr10061136.

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Non-ionic surfactants are compatible with different types of materials, therefore they can be applied in various packages. Fatty-acid derivates as non-ionic surfactants and their mixtures were investigated to study their colloidal behavior. The HLB value, the particle size, the emulsification capacity and the interfacial tension of various commercial, non-ionic surfactants, and their mixtures with sodium lauryl-ether-sulfate (SLES), were determined. The surfactant mixtures were prepared in different non-ionic: anionic surfactant ratios to examine their effect on several surfactant characterist

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14

Carlino, S. "High-resolution solid-state magic-angle spinning nuclear magnetic resonance studies on the thermal decomposition of the layered antimony hydrogen phosphate, HSb(PO4)2·2H2O." Solid State Ionics 106, no. 3-4 (1998): 269–77. http://dx.doi.org/10.1016/s0167-2738(97)00501-8.

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15

Chu, Fang-Yi, Shannon C. Haley, and Alexandra Zidovska. "On the origin of shape fluctuations of the cell nucleus." Proceedings of the National Academy of Sciences 114, no. 39 (2017): 10338–43. http://dx.doi.org/10.1073/pnas.1702226114.

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The nuclear envelope (NE) presents a physical boundary between the cytoplasm and the nucleoplasm, sandwiched in between two highly active systems inside the cell: cytoskeleton and chromatin. NE defines the shape and size of the cell nucleus, which increases during the cell cycle, accommodating for chromosome decondensation followed by genome duplication. In this work, we study nuclear shape fluctuations at short time scales of seconds in human cells. Using spinning disk confocal microscopy, we observe fast fluctuations of the NE, visualized by fluorescently labeled lamin A, and of the chromati

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16

Carlino, Simon, and Michael J. Hudson. "High-resolution solid-state magic-angle spinning nuclear magnetic resonance studies on the layered antimony hydrogen phosphate, HSb(PO4)2·2H2O and some organic amine intercalation compounds." Solid State Ionics 99, no. 1-2 (1997): 103–14. http://dx.doi.org/10.1016/s0167-2738(97)00264-6.

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17

Carlino, Simon, Michael J. Hudson, and William J. Locke. "High-resolution solid-state magic angle spinning nuclear magnetic resonance studies on the layered antimony hydrogen phosphate, HSb(PO4)2·2H2O, and its reaction products with tetrakis(pyridyl)iron(II) chloride." Journal of Materials Chemistry 7, no. 5 (1997): 813–19. http://dx.doi.org/10.1039/a700151g.

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18

Stando, Grzegorz Jan, Pyry-Mikko Hannula, Bogumiła Kumanek, Mari Lundström, Haitao Liu, and Dawid Janas. "(Digital Presentation) Recovery of Copper from Wastewater By Electrodeposition Onto Nanocarbon Composites." ECS Meeting Abstracts MA2022-01, no. 9 (2022): 761. http://dx.doi.org/10.1149/ma2022-019761mtgabs.

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The connection of carbon nanostructures such as graphene or carbon nanotubes with other materials like metals [1] or polymers [2] is often beneficial. For example, composites consisting of copper and nanocarbon materials have improved electrical [1] and mechanical [3] properties due to the synergy effect. Unfortunately, the integration between copper and nanocarbon is not an easy task because of the “cuprophobic” nature of nanocarbon [4]. Recently, many methods have been developed to accomplish this challenge. Out of all available techniques, physical (casting, spark plasma sintering or metal

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19

Tai, W. C., and I. Y. Shen. "Closed-Form Vibration Response of a Special Class of Spinning, Cyclic Symmetric Rotor-Bearing-Housing Systems." Journal of Vibration and Acoustics 137, no. 6 (2015). http://dx.doi.org/10.1115/1.4031314.

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Vibration of a spinning, cyclic symmetric rotor supported by flexible bearings and housing is governed by a set of ordinary differential equations with periodic coefficients. As a result, analytical solutions of such systems are generally not available. This paper is to prove that closed-form solutions are available for such systems if the following two conditions are met. First, the rotor has a rigid hub and the rest of the rotor is flexible. Second, elastic mode shapes of the rotor's flexible part only present axial displacement. Under these two conditions, the periodic coefficients will onl

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20

Landry, Céderick, Patrick K. Dubois, Jean-Sébastien Plante, François Charron, and Mathieu Picard. "Rotordynamics of a Highly Flexible Hub for Inside-Out Ceramic Turbine Application: Finite Element Modeling and Experimental Validation." Journal of Vibration and Acoustics 140, no. 1 (2017). http://dx.doi.org/10.1115/1.4037700.

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The inside-out ceramic turbine (ICT) is a promising concept to increase turbine inlet temperatures in microturbines by integrating individual monolithic ceramic. This architecture uses a carbon–polymer composite rim to support the blades mainly in compression. High tangential velocities lead to elevated radial displacement of the rim, and therefore, the rotor hub needs to have sufficient compliance to follow this radial displacement. However, the rotordynamics of a flexible hub is not widely understood. This paper presents the rotordynamic analysis of a highly flexible hub for an ICT architect

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21

Buchwald, Patrick, Damian M. Vogt, Julien Grilliat, et al. "Aeroacoustic Analysis of Low-Speed Axial Fans With Different Rotational Speeds in the Design Point." Journal of Engineering for Gas Turbines and Power 140, no. 5 (2017). http://dx.doi.org/10.1115/1.4038122.

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One of the main design decisions in the development of low-speed axial fans is the right choice of the blade loading versus rotational speed, since a target pressure rise could either be achieved with a slow spinning fan and high blade loading or a fast spinning fan with less flow turning in the blade passages. Both the blade loading and the fan speed have an influence on the fan performance and the fan acoustics, and there is a need to find the optimum choice in order to maximize efficiency while minimizing noise emissions. This paper addresses this problem by investigating five different fan

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22

Wang, Yu, Wei Fan, and Hui Ren. "Deployment Dynamics and Control of a Hub-Spoke Tethered Satellite Formation Using Combined Arbitrary Lagrange-euler and Referenced Nodal Coordinate Formulation." Journal of Computational and Nonlinear Dynamics, July 20, 2024, 1–44. http://dx.doi.org/10.1115/1.4066043.

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Abstract A novel modeling framework combining arbitrary Lagrange-Euler and referenced nodal coordinate formulation (ALE-RNCF) is proposed for deployment dynamics and control of a hub-spoke tethered satellite formation. The ALE-RNCF approach allows for an accurate analysis of the intricate coupling effect between the orbit, attitude, and deployment dynamics, and its strengths lie in overcoming the accuracy loss and low-efficiency issues when dealing with spatial and temporal multiscale problems. Specifically, the orbital and attitude motions are separated with vibrations of the variable-length

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23

Parry, A. B., and M. J. Kingan. "Acoustic theory of the many-bladed contra-rotating propeller: physics of the wake interaction noise critical sources." Journal of Fluid Mechanics 880 (October 7, 2019). http://dx.doi.org/10.1017/jfm.2019.755.

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In the theory of interaction noise from contra-rotating propellers with many blades, the usual far-field radiation formulae can be re-cast as a double integral, over a source surface, which can be evaluated asymptotically solely in terms of the contributions from critical points. The paper shows that these critical points have a particularly interesting physical meaning. They relate to locations on an event line, running between hub and tip, that represent the locus of the wake–blade interactions at a fixed point in time. The event line rotates at the speed of the spinning interaction tone but

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24

IMAFIDON, HENRY O., OLUWATOYIN O. AJAYI, and SAMUEL A. DARAMOLA. "THE ECONOMIC AND ENVIRONMENTAL POTENTIAL OF A TEXTILE HUB IN OGUN STATE, NIGERIA." International Journal of Built Environment and Earth Science, July 20, 2025. https://doi.org/10.70382/tijbees.v08i4.050.

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Situated at the industrial crossroads of southwestern Nigeria, Ogun State presents a compelling case for a purpose‑built textile hub that can simultaneously catalyse economic diversification and advance environmental stewardship. This study interrogates that potential from a dual economic–ecological vantage point, integrating macro‑economic modelling, life‑cycle assessment, and stakeholder interviews to provide a holistic appraisal. The economic analysis projects that a cluster comprising spinning, weaving, garment‑making and ancillary chemical industries could add ₦180 billion to regional GDP

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25

Hanley, Janis. "Spinning Circle at the Mill." M/C Journal 26, no. 6 (2023). http://dx.doi.org/10.5204/mcj.2936.

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An artful Facebook post after a research event, a spinning circle held at a state heritage listed former mill, is used to explore the intersection of craftivism and the politics around the future of this site. This article takes a new materialism approach to explore the dynamic interactions (intra-actions) and shifting power relations around place (territorialisations). Both the spinning circle and the post were a gentle activism, or as Greer (12) describes it, craftivism, whose essence lies in ‘creating something that gets people to ask questions’. In 2018, I conducted the research event, the

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Wadyl, Sławomir, Paweł Szczepanik, Aldona Mueller-Bieniek, Daniel Makowiecki, and Wiesław Małkowski. "Multidisciplinary study provides insight into archaeological context and environmental background of short-lived stronghold of Obłęże (Pomerania, Poland)." Praehistorische Zeitschrift, July 11, 2025. https://doi.org/10.1515/pz-2025-2021.

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Abstract The early medieval settlement complex in Obłęże, situated along the Wieprza River, represents a unique archaeological site in Central Pomerania, distinguished by its well-preserved wooden structures and short period of occupation. This article presents the findings of a 2021 excavation, preceded by non-invasive geophysical surveys that accurately identified key excavation areas. The research uncovered remains of a wooden rampart, a wharf, and a section of road leading to the river, with dendrochronological dating placing the construction of the stronghold around 1110. The settlement’s

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27

Abd El-Hafiz, M. M., M. A. A. Emam, W. A. H. Oraby, and S. Shaaban. "Modeling and Simulation of Off-Road Vehicle Mobility with Driving Torque Distribution Control on Split Adhesion Conditions." International Journal of Vehicle Structures and Systems 9, no. 2 (2017). http://dx.doi.org/10.4273/ijvss.9.2.07.

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This paper presents a theoretical model for simulation of driving torque distribution control to improve off-road vehicle mobility on split adhesion conditions. The model is constructed and then validated with experimental test rig results. A MATLAB simulink modeling of an electronically controlled device is used to modulate the applied force over multi-plate clutches located between the automotive driven axle shafts and the stationary hub. On driving over split adhesion roads, the control device brakes the spinning axle wheel running over ground low adhesion side and accordingly biases more t

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Grindheim, Ole-Martin, Yihan Xing, and Thomas Impelluso. "Dynamic analysis and validation of a multi-body floating wind turbine using the moving frame method." Frontiers in Mechanical Engineering 9 (August 28, 2023). http://dx.doi.org/10.3389/fmech.2023.1156721.

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This research applies the moving frame method (MFM) to the multi-body dynamic analysis of an OC3 phase IV spar buoy with the NREL 5MW turbine. Further, it verifies previous results obtained through numerical comparisons with commercial software. The long-term goal is to lay the foundation for leveraging the MFM to create a self-contained software system for future analyses that can incorporate effects that are more sophisticated, when commercial codes fall short. In this first evidentiary phase, this project treats the floating turbine as a three-bodied system consisting of the platform (platf

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29

Mrgić, Jelena. "Pictures and Words 2 – An Italian Caricature at the End of the Great Vienna War (1683–1699) as “Icono-Text”." Etnoantropološki problemi / Issues in Ethnology and Anthropology 18, no. 1 (2023). http://dx.doi.org/10.21301/eap.v18i1.9.

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 This paper is a branch of my previous research, dealing with allegorical and persuasive cartography, as an exercise in more recent theoretical interpretations of marginalized historical sources – caricatures. The introduction gives the readers an overview of the modern methodology and secondary literature. Furthermore, Giuseppe Maria Mitelli (1634–1718) is unknown to our audience. Therefore, this paper cannot deal with his immenseoeuvre, but only one example of his mastery, the caricature “An International Array of Doctors Counselling the Sultan”. This engraving is dated approximately t

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30

Sharma, Jyoti, K. G. Suresh, M. Manivel Raja, and Pravin Walke. "Martensitic Transition, Magnetic, Microstructural and Exchange Bias Properties of Melt Spun Ribbons of Mn-Ni-Sn Shape Memory Heusler Alloy." Frontiers in Materials 7 (October 30, 2020). http://dx.doi.org/10.3389/fmats.2020.520630.

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In the present report, we have studied the structural, microstructural, magnetic, exchange bias (EB) properties and magnetoresistance (MR) in Mn rich (Mn at. ∼50%) Mn50Ni50−xSnx (x = 10) shape memory Heusler alloy ribbons, prepared using the melt spinning method. These ribbons were found to exhibit a first order structural (i.e., martensitic) transition at around 205 K from the high temperature austenite to the low temperature martensite phase. The martensitic transition occurs at comparatively lower temperatures in these ribbons than in the same bulk alloy. Curie temperature of the austenite

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31

Smrt, Sean T., Nicole Gonzalez Salguero, Justin K. Thomas, Mohamad Zandian, Michael G. Poirier, and Christopher P. Jaroniec. "Histone H3 core domain in chromatin with different DNA linker lengths studied by 1H-Detected solid-state NMR spectroscopy." Frontiers in Molecular Biosciences 9 (January 4, 2023). http://dx.doi.org/10.3389/fmolb.2022.1106588.

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Chromatin, a dynamic protein-DNA complex that regulates eukaryotic genome accessibility and essential functions, is composed of nucleosomes connected by linker DNA with each nucleosome consisting of DNA wrapped around an octamer of histones H2A, H2B, H3 and H4. Magic angle spinning solid-state nuclear magnetic resonance (NMR) spectroscopy can yield unique insights into histone structure and dynamics in condensed nucleosomes and nucleosome arrays representative of chromatin at physiological concentrations. Recently we used J-coupling-based solid-state NMR methods to investigate with residue-spe

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Collier, Daniel M., Nuria M. Villalba, Adrian M. Sackheim, Kalev Freeman, and Mark T. Nelson. "Extracellular Histones Induce Propagating Ca²⁺ Influx, Ca²⁺ Overload, and Endothelial Cell Death in Resistance‐sized Mouse Mesenteric Arteries." FASEB Journal 31, S1 (2017). http://dx.doi.org/10.1096/fasebj.31.1_supplement.837.10.

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Elevated levels of histone proteins are found in the circulation of patients following traumatic injury (healthy: 2.3 μg/ml, 4 hrs post trauma: 10–230 μg/ml, Abrams et al. 2013. Am. J. Respir. Crit. Care. Med.) and are associated with coagulopathy, sepsis, and poor patient outcome. The mechanism and specific ion channels involved have not been identified. We used resistance‐sized mouse mesenteric arteries (MA) to study the effects of extracellular histones on native tissue. To study the spatial and temporal characteristics of histone induced endothelial cell (EC) Ca2+ signals, we utilized spin

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sprotocols. "Automated Lineage and Expression Profiling in Live Caenorhabditis elegans Embryos." December 30, 2014. https://doi.org/10.5281/zenodo.13633.

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Authors: John Isaac Murray and Zhirong Bao Adapted from [*Imaging in Developmental Biology*](http://www.cshlpress.com/link/imagingdevbiop.htm)(ed. Sharpe and Wong). CSHL Press, Cold Spring Harbor, NY, USA, 2011. ### Abstract Describing gene expression during animal development requires a way to quantitatively measure expression levels with cellular resolution and to describe how expression changes with time. Fluorescent protein reporters make it possible to measure expression dynamics in live cells by time-lapse microscopy, but it can be challenging to identify expressing cells in complex tiss

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