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Artículos de revistas sobre el tema "Ring expension"

Autor: Grafiati
Publicado: 22 de febrero de 2025
Última modificación: 31 de julio de 2025

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1

Kozu, H., Y. Jumonji, C. Yamazaki, Y. Shoji, S. Hashimoto, and A. Ando. "A crowbarless power supply for klystrons." Journal of Synchrotron Radiation 5, no. 3 (1998): 374–75. http://dx.doi.org/10.1107/s0909049597015331.

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A new crowbarless power supply is to be installed at the New SUBARU storage ring. A high-power switching inverter unit eliminates the need for expensive and unstable crowbar circuits for the klystron power supply. It also realizes a very small voltage ripple in the low-frequency region. This is an important characteristic, especially in a quasi-isochronous storage ring such as New SUBARU.
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2

Chandrasekhar, V. N., Himavathi Ganja, Aviraboina Siva Prasad, and L. Vaikunta Rao. "Streamlined synthesis of 3-azabicyclo [2.2.2] oct-3-one hydrochloride: enhanced and simplified approach." International Journal of Research in Pharmaceutical Sciences 16, no. 2 (2025): 78–83. https://doi.org/10.26452/ijrps.v16i2.4757.

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The quinuclidine ring system, found in various natural products and pivotal in synthesizing therapeutic compounds such as azasetron and palonosetron, holds significant importance. Azabicyclo[2.2.2]oct-3-one derivatives, derivatives of this ring system, exhibit diverse biological activities ranging from anti-cancer to antihistaminic properties. Moreover, they serve as key components in catalysts for asymmetric reactions. However, the conventional synthesis method for azabicyclo[2.2.2]oct-3-one hydrochloride suffers from drawbacks like the use of toxic pyridine rings and expensive catalysts, mak
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3

Chang, Jian, Shaolei Wang, Yang Yu, Bing Wang, and Biao Liang. "Experimental research on thermal aging test of rubber seal under different compression conditions." Journal of Physics: Conference Series 2971, no. 1 (2025): 012003. https://doi.org/10.1088/1742-6596/2971/1/012003.

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Abstract Natural aging test is time-consuming and expensive, and it is difficult to meet the requirements of efficient and rapid evaluation of rubber seals as well. So the accelerated aging test method is widely used in the evaluation of rubber seal ring. In this paper, three constant temperature aging tests under two different compression rates were carried out. The permanent compression rate is taken as the performance degradation parameter of the rubber seal ring, the aging law of the seal ring under the impact of high temperature and circulating temperature is analyzed, and the influence o
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4

Thul, Mayur, Yao-Peng Wu, Yi-Jyun Lin, et al. "Ionic Liquid Catalyzed Per-O-Acetylation and Benzylidene Ring-Opening Reaction." Catalysts 10, no. 6 (2020): 642. http://dx.doi.org/10.3390/catal10060642.

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Tunable aryl imidazolium ionic liquids acting as Brønsted acid ionic liquids were found to be efficient catalysts for per-O-acetylation and reductive ring opening of benzylidene acetals. This method requires a truly catalytic amount of the least expensive available ionic liquids that are water-stable and reusable and also stable at room temperature. The reactions were obtained in one hour with good to excellent yields. These reactions can form C−O and C−H bonds with a high atom economy. Furthermore, the ionic liquid is an anomeric selective catalyst in per-O-acetylation and reductive ring open
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5

Chaudhary, MilindM. "Diamonds are expensive, rings are not: Mastering the paradoxical evolution of nonunion treatment." Journal of Limb Lengthening and Reconstruction 5, no. 2 (2019): 51. http://dx.doi.org/10.4103/jllr.jllr_24_19.

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6

Krause, Cornelia, and Hubert Morin. "Impact of spruce budworm defoliation on the number of latewood tracheids in balsam fir and black spruce." Canadian Journal of Forest Research 25, no. 12 (1995): 2029–34. http://dx.doi.org/10.1139/x95-219.

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The influence of spruce budworrn (Choristoneurafumiferana (Clem.)) defoliation was analysed at different stem heights by counting the number of latewood tracheids and measuring tree-ring width. The total height of the tree was divided into three different equal parts: the lower, the middle, and the upper sections of the total stem length. However, only the results of the lower and the upper sections will be presented in this paper. The reduction of ring widths started in the upper part for the living crown and continued downwards to the stem base (0 m) with a delay of 1–2 years. The number of
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7

Wang, Lily, Serge Payette, and Yves Bégin. "Relationships between anatomical and densitometric characteristics of black spruce and summer temperature at tree line in northern Quebec." Canadian Journal of Forest Research 32, no. 3 (2002): 477–86. http://dx.doi.org/10.1139/x01-208.

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Tracheid cell number, cell diameter, and cell-wall thickness of black spruce (Picea mariana (Mill.) BSP) tree rings at the tree line (northern Quebec, Canada) were measured using image analysis. The densitometric data from the same samples were used to evaluate the features of image analysis. The anatomical data were correlated with summer temperature variables, including: means of pentad temperature (five consecutive days), growing season (May- September), sum of degree-days, and number of frost-free days. Our results suggest that the main cause of the pale appearance of light rings is thinne
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8

Zafar, Mohsin, Karl Kratkiewicz, Rayyan Manwar, and Mohammad Avanaki. "Development of Low-Cost Fast Photoacoustic Computed Tomography: System Characterization and Phantom Study." Applied Sciences 9, no. 3 (2019): 374. http://dx.doi.org/10.3390/app9030374.

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A low-cost Photoacoustic Computed Tomography (PACT) system consisting of 16 single-element transducers has been developed. Our design proposes a fast rotating mechanism of 360o rotation around the imaging target, generating comparable images to those produced by large-number-element (e.g., 512, 1024, etc.) ring-array PACT systems. The 2D images with a temporal resolution of 1.5 s and a spatial resolution of 240 µm were achieved. The performance of the proposed system was evaluated by imaging complex phantom. The purpose of the proposed development is to provide researchers a low-cost alternati
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9

ISLAM, SYED S., and A. F. M. ANWAR. "SPICE MODEL OF AlGaN/GaN HEMTs AND SIMULATION OF VCO AND POWER AMPLIFIER." International Journal of High Speed Electronics and Systems 14, no. 03 (2004): 853–59. http://dx.doi.org/10.1142/s0129156404002946.

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SPICE model parameters are extracted from reported experimental data. The model is implemented in the Cadence Affirma Analog Circuit Design Environment and Spectre simulator is used to simulate class-E power amplifier and ring voltage controlled oscillator (VCO) circuits. The availability of the SPICE model for GaN HEMTs ensures optimization of analog/RF circuits before an expensive cut-and-try method is employed.
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10

Straže, Aleš, Klemen Novak, and Katarina Čufar. "Quality and Price of Spruce Logs, Determined Conventionally and by Dendrochronological and NDE Techniques." Forests 13, no. 5 (2022): 729. http://dx.doi.org/10.3390/f13050729.

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We examined valuable log assortments of Norway spruce (Picea abies) from a traditional auction in Slovenia where spruce growth on many sites is affected by climate change. From 6620 logs, we selected 817 that obtained the highest prices. Factors including log dimensions and geometry, tree-ring characteristics, quality grades according to the standard, properties measured by NDE stress wave testing, and their combined effect on price were modelled. The results showed that half of the auctioned logs were of highest quality (Q1, Q2), with diameters over 60 cm. These logs were more expensive than
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11

Gusev, A. S., C. B. Danilenko, S. A. Starodubtseva, and V. Ya Teteryatnikov. "Dynamics of a "Hamster Wheel" Test Bench." Proceedings of Higher Educational Institutions. Маchine Building, no. 5 (746) (May 2022): 3–9. http://dx.doi.org/10.18698/0536-1044-2022-5-3-9.

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Ground tests of vehicles such as cars and tractors, including life tests and functional tests, are expensive and time-consuming. We propose to replace them with relatively inexpensive time-saving tests using a "hamster wheel" test bench. The vehicle inside a rotating ring remains at rest relative to the ground but in motion relative to the inner surface of the ring. This surface can be equipped with artificial obstacles to simulate actual road irregularities. We constructed differential equations of motion for the system and established the nature of the relative motion involving the outer rin
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12

Deans, Douglas. "Effect of Openings in Ring-Reinforced Shells." Marine Technology and SNAME News 27, no. 01 (1990): 56–64. http://dx.doi.org/10.5957/mt1.1990.27.1.56.

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The ring-reinforced shell is a primary structure used in the marine and industrial world. Stress and buckling analysis of such structures is generally based on axisymmetric analysis wherein all openings in the shell are neglected. In real life, such structures have a large number of openings often made in a random manner. In order to design an appropriate reinforcement at such an opening, it is necessary to carry out a detailed local stress analysis. Such an analysis can be made either through the use of part models or by superelements which include the entire structure, as well as the local r
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13

Tkachuk, Mykola M., Andrey Grabovskiy, Mykola А. Tkachuk, et al. "ANALYSIS OF NONLINEAR RIGIDITY CHARACTERISTICS OF AIR BLOWER COMPRESSOR ELASTIC SUPPORTS." Bulletin of the National Technical University «KhPI» Series: Engineering and CAD, no. 1 (June 7, 2023): 121–30. http://dx.doi.org/10.20998/2079-0775.2023.1.12.

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Vibrations of rotor systems are largely determined by elastic characteristics of supports. In the general case, the dependence of displacements on force for such supports is nonlinear. This applies to bearing supports of various types. In addition to bearings, elastic elements are also used in supports of rotor systems. They are designed to change the overall stiffness of the supports. The paper analyzes the radial stiffness of flexible ring dampers used in rotor supports. For this, two main approaches are proposed. The first is a conventional simulation of this problem of contact mechanics us
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14

Antonyuk, V. E., S. G. Sandomirski, and V. V. Rudii. "TASKS OF TECHNOLOGICAL SUPPORT OF THE AUTOMATED RING ROLLING COMPLEX." Mechanics of Machines, Mechanisms and Materials 2, no. 55 (2021): 42–53. http://dx.doi.org/10.46864/1995-0470-2021-2-55-42-53.

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The physical foundations and advantages of ring rolling are described. The materials science and technological processes of manufacture of products with its use are generalized. An analysis of the equipment of an automated ring rolling line was carried out, which showed that it is a complex and expensive technical solution. Moreover, the organization of the line with maximum load and efficiency is not included in the supplier’s tasks. The requirements for the maximum load of the line and its efficient operation have been determined. It is shown that the use of the experience of creating automa
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15

DOBREV, STEFAN, NICOLA SANTORO, and WEI SHI. "USING SCATTERED MOBILE AGENTS TO LOCATE A BLACK HOLE IN AN UN-ORIENTED RING WITH TOKENS." International Journal of Foundations of Computer Science 19, no. 06 (2008): 1355–72. http://dx.doi.org/10.1142/s0129054108006327.

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A black hole in a network is a highly harmful host that disposes of any incoming agents upon their arrival. Determining the location of a black hole in a ring network has been studied when each node is equipped with a whiteboard. Recently, the Black Hole Search problem was solved in a less demanding and less expensive token model with co-located agents. Whether the problem can be solved with scattered agents in a token model remains an open problem. In this paper, we show not only that a black hole can be located in a ring using tokens with scattered agents, but also that the problem is solvab
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16

Yang, Li Jun, Ze Hui Zhang, Xin An Dang, and Lin Li. "Properties of TiAl/TiAlN/TiAlCN Films Deposited by Arc Ion Plating on GCr15 Rings." Materials Science Forum 789 (April 2014): 449–54. http://dx.doi.org/10.4028/www.scientific.net/msf.789.449.

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Ring is one of the major textile spinning machine consumable part, it has an important influence on yarn quality and cost. Ring of domestic cotton spinning enterprises generally has poor hardness, bad accuracy, not durable and difficult to guarantee the quality of the yarn, foreign ring has excellent performance, but it is too expensive, so it is difficult to widely used in China[1]. Vacuum arc ion plating technology has a wide range of applications in the aerospace, automobile, mold, tool, electronics and other fields [2-3]. TiN film which is prepared by arc ion plating technology has been wi
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17

Prasath, Gm Arun. "INVENTORY MANAGEMENT THROUGH EXTENDED STAR-RING SUPPLY CHAIN NETWORK." Asian Journal of Pharmaceutical and Clinical Research 10, no. 13 (2017): 199. http://dx.doi.org/10.22159/ajpcr.2017.v10s1.19637.

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Objectives: The production-distribution inventory problem has two main sectors namely production and distribution. In this paper, the nonlinearmathematical model of extended star-ring supply chain network is developed.Methods: Planning a distribution network plays a vital role in minimizing the total expenditure of the project; to prove this, a ring network topology is taken to supply goods to the SWs and extended star network topology to supply goods to the selling stores. However, setting up separate SWs for each and every selling store will be highly expensive. Hence, keeping the minimum nu
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18

Natalia, Monika, Zulfira Mirani, and Yan Partawijaya. "Penerapan Pelapis Dinding Kawat Ayam di Desa Koto Marapak Kabupaten Padang Pariaman." Dinamisia : Jurnal Pengabdian Kepada Masyarakat 5, no. 2 (2020): 458–65. http://dx.doi.org/10.31849/dinamisia.v5i2.4682.

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Earthquake-safe house, the costs not expensive. We can eliminate earthquake damage by strengthening our house while paying attention the rules of structure. Use chicken wire reinforcement. Chicken wire reinforcement can strengthen the walls by wrapping. Chicken wire can also be used to strengthen practical columns as well as ring beams. And to improve the connection between practical column structural elements with ring beams and wall to column anchoring. Result is to be help the residents of Koto Marapak Village in Padang Pariaman to provide counseling and training to strengthen their homes s
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19

Rammah, A. Alahnomi, Zakaria Z., Mohd Yussof Zulkalnain, Sutikno Tole, Alhegazi Ammar, and Ismail Abu-Khadrah Ahmed. "Enhanced symmetrical split ring resonator for metallic surface crack detection." TELKOMNIKA Telecommunication, Computing, Electronics and Control 17, no. 4 (2019): 2107–15. https://doi.org/10.12928/TELKOMNIKA.v17i4.12939.

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An enhanced sensor based on symmetrical split ring resonator (SSRR) functioning at microwave frequencies has been proposed in order to detect and characterize the metal crack of the materials. This sensor is based on perturbation theory, in which the dielectric properties of the material affect the quality factor and resonance frequency of the microwave resonator. Conventionally, coaxial cavity, waveguide, dielectric resonator techniques have been used for characterizing materials. However, these techniques are often large, and expensive to build, which restricts their use in many important ap
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20

Hemalatha, Kanagarajan, Gunabalan Madhumitha, Amir Kajbafvala, Narayanan Anupama, Rajesh Sompalle, and Selvaraj Mohana Roopan. "Function of Nanocatalyst in Chemistry of Organic Compounds Revolution: An Overview." Journal of Nanomaterials 2013 (2013): 1–23. http://dx.doi.org/10.1155/2013/341015.

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Heterocyclic motif is an important scaffold which has both industrial and pharmaceutical applications. These motifs can be prepared using wide variety of reaction conditions such as the use of expensive catalyst, toxic solvent, harsh reaction condition like the use of base, high temperature, and multistep reaction. Although various methods are involved, the chemistry arena is now shifted towards the greener way of synthesis. Nanocatalyst constitutes an important role in the green synthesis. This is because the activity of the catalyst resides in the exposed portion of the particles. By decreas
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21

Alshehhi, Rasha, Chris S. Hanson, Laurent Gizon, and Shravan Hanasoge. "Supervised neural networks for helioseismic ring-diagram inversions." Astronomy & Astrophysics 622 (February 2019): A124. http://dx.doi.org/10.1051/0004-6361/201834237.

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Context. The inversion of ring fit parameters to obtain subsurface flow maps in ring-diagram analysis for eight years of SDO observations is computationally expensive, requiring ∼3200 CPU hours. Aims. In this paper we apply machine-learning techniques to the inversion step of the ring diagram pipeline in order to speed up the calculations. Specifically, we train a predictor for subsurface flows using the mode fit parameters and the previous inversion results to replace future inversion requirements. Methods. We utilize artificial neural networks (ANNs) as a supervised learning method for predi
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22

Welker, Andrea, James Press, Kristin Sample-Lord, and Virginia Smith. "Estimation of Rain Garden Field Hydraulic Conductivity Based on Spot Infiltration Tests." Water 17, no. 3 (2025): 418. https://doi.org/10.3390/w17030418.

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Rain gardens are increasingly being used to control stormwater. Infiltration is a key component of volume control. Thus, determining the infiltration rate or field saturated hydraulic conductivity (Ksat) of rain gardens is critical to their continued successful operation. Designers and inspectors of rain gardens need to rapidly and efficiently determine the field Ksat. Prior research has found that single-ring infiltrometers (Princeton Hydro, Trenton, NJ, USA) can reliably be used to determine the infiltration rates of soils. The question often posed by designers and inspectors is “how many sp
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23

Li, Mengmeng, Sixuan Wang, Feifei Li, Lin Zhou, and Lin Lei. "Iodine-mediated photo-controlled atom transfer radical polymerization (photo-ATRP) and block polymerization combined with ring-opening polymerization (ROP) via a superbase." Polymer Chemistry 11, no. 41 (2020): 6591–98. http://dx.doi.org/10.1039/d0py01031f.

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24

Chandra, Anshuman, Krishnendu Chakrabarty, and Mark C. Hansen. "Efficient Test Application for Core-Based Systems Using Twisted-Ring Counters." VLSI Design 12, no. 4 (2001): 475–86. http://dx.doi.org/10.1155/2001/75139.

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We present novel test set encoding and pattern decompression methods for core-based systems. These are based on the use of twisted-ring counters and offer a number of important advantages–significant test compression (over 10X in many cases), less tester memory and reduced testing time, the ability to use a slow tester without compromising test quality or testing time, and no performance degradation for the core under test. Surprisingly, the encoded test sets obtained from partially-specified test sets (test cubes) are often smaller than the compacted test sets generated by automatic test patt
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25

Stepanenko, D. A., and A. N. Kindruk. "Variational Problem on Vibrations of Unequal-Thickness Rings and Its Application for Calculating Ultrasonic Vibration Concentrators." Science & Technique 23, no. 4 (2024): 295–303. http://dx.doi.org/10.21122/2227-1031-2024-23-4-295-303.

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The paper considers a method for calculating the natural frequencies of vibrations of unequal-thickness rings, based on application of Hamilton’s variational principle and theories of vibrations of curved beams of the Euler-Bernoulli and Timoshenko type. Solutions of the problem are represented as Fourier series providing possibility of its reduction to the system of linear algebraic equations. The problem of determining natural frequencies is reduced to a generalized problem for the eigenvalues of matrices. Based on a comparison of the numerical results obtained for an eccentric ring with the
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26

Li, Guangzhi, and Rahul Simha. "An efficient algorithm for reducing the number of Add‐Drop Multiplexers in SONET/WDM rings." Journal of High Speed Networks 11, no. 1 (2002): 67–77. https://doi.org/10.3233/hsn-2002-215.

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This paper considers a network design problem introduced by Gerstel, Lin and Sasaki (INFOCOM'98) in which resource allocation is performed within a Wavelength Division Multiplexing (WDM) optical ring network to reduce overall equipment cost. The problem can be summarized as follows. The Add‐Drop Multiplexers (ADM's) that are used to terminate lightpaths in an optical (SONET/SDH) ring are expensive. A naive implementation would require ADM's for each wavelength at each node. However, by carefully assigning connections to wavelengths and routing the resulting lightpaths, one may avoid terminatin
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27

Nakajima, Hideki, Siriwat Soontaranon, Noppharit Wasanbongngem, et al. "Magnetic field simulation of in-vacuum permanent magnet multipole wiggler." Journal of Physics: Conference Series 3010, no. 1 (2025): 012007. https://doi.org/10.1088/1742-6596/3010/1/012007.

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Abstract We present the magnetic field simulation and design of a high-field permanent magnet-based in-vacuum multipole wiggler for the Siam Photon Source (SPS). SPS utilizes a 1.2-GeV electron storage ring with a double-bend achromat (DBA) lattice, featuring four long straight sections capable of accommodating insertion devices up to 5 m in length. To generate tender and hard X-ray radiation in this low-energy storage ring, an in-vacuum permanent magnet multipole wiggler is designed as a cost-effective alternative to superconducting wigglers, which are expensive to operate and maintain. The m
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28

Varentsov, V. L., D. R. Hansevarov, and D. V. Varentsov. "The generation of an internal molecular-beam target from expensive gaseous and nonvolatile substances for storage rings." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 352, no. 3 (1995): 542–47. http://dx.doi.org/10.1016/0168-9002(95)90002-0.

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29

Kiernan, Philip, and Klaus-Peter Henz. "Rings from the Forbidden Forest: the function and meaning of Roman trinket rings." Journal of Roman Archaeology 36, no. 1 (2023): 73–95. http://dx.doi.org/10.1017/s1047759423000211.

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AbstractA group of 24 bronze finger-rings threaded onto a wire bracelet was unearthed in 2018 at the Roman vicus at Wareswald (the “Forbidden Forest”) in Gallia Belgica. The find is analyzed here alongside evidence for the use, sale, and production of Roman rings. The find represents the work of a local craftsman, active in the first quarter of the 4th c. CE. While the rings were made in a small rural town, they closely imitate expensive global ring forms. The function and meaning of the very common class of trinket rings to which the Wareswald rings belong are considered, along with how these
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30

Ilyin, Alexander, Igor Plokhov, and Andrey Isakov. "The Simulation Model of a Sliding Contact." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 2 (August 8, 2015): 111. http://dx.doi.org/10.17770/etr2013vol2.850.

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This paper deals with the brush slip ring contact modeling. Approaches the sliding contact problem with the synergy theory. The contact layer is considered using mechanical, electrical and thermal properties. The simulation model includes algorithms of: - generation of microscale contact surface, - approachment of two surfaces, - fritting and breakdown effects of oxide layer, - extracting clusters of conducting area, - calculating constriction resistance using fractal dimensionality, - generation of heat caused by electrical current and mechanical friction, - calculation of integral characteri
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31

Fenercioğlu, Tevfik Ozan, and Tuncay Yalçinkaya. "Computational–Experimental Design Framework for Laser Path Length Controller." Sensors 21, no. 15 (2021): 5209. http://dx.doi.org/10.3390/s21155209.

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The application areas of piezoelectric materials are expanding rapidly in the form of piezo harvesters, sensors and actuators. A path length controller is a high-precision piezoelectric actuator used in laser oscillators, especially in ring laser gyroscopes. A path length controller alters the position of a mirror nanometrically by means of a control voltage to stabilize the route that a laser beam travels in an integral multiple of laser wavelength. The design and verification of a path length controller performance requires long (up to 3 months), expensive and precise production steps to be
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32

Davies, Mark, Mannthalah Abubaker, and Lorraine Bible. "A Flexible, Microfluidic, Dispensing System for Screening Drug Combinations." Micromachines 11, no. 10 (2020): 943. http://dx.doi.org/10.3390/mi11100943.

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It is known that in many cases a combination of drugs is more effective than single-drug treatments both for reducing toxicity and increasing efficacy. With the advent of organoid screens, personalised medicine has become possible for many diseases. Automated pipetting to well plates is the pharmaceutical industry standard for drug screening, but this is relatively expensive and slow. Here, a rotary microfluidic system is presented that can test all possible drug combinations at speed with the use of droplets. For large numbers of combinations, it is shown how the experimental scale is reduced
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33

Fundarò, Pino, Paolo M. Tartara, Emmanuel Villa, Pasquale Fratto, Salvatore Campisi, and Ettore O. Vitali. "Mitral Valve Repair: Is There Still a Place for Suture Annuloplasty?" Asian Cardiovascular and Thoracic Annals 15, no. 4 (2007): 351–58. http://dx.doi.org/10.1177/021849230701500420.

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Prosthetic ring annuloplasty is considered the gold standard technique for mitral valve repair, but it has been associated with some drawbacks. Suture annuloplasty is less expensive and may have some physiopathologic advantages. We reviewed the literature to assess clinical results of mitral suture annuloplasty. Thirteen series, each reporting more than 50 patients and published in the last 10 years, were included in the analysis. They comprised 1,648 patients with cumulative follow-up of 5,607 patient-years. Our review suggests that suture annuloplasty is a safe procedure, but a trend toward
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34

van der Borg, Guus, Harry Warner, Melina Ioannidis, Geert van den Bogaart, and Wouter H. Roos. "PLA 3D Printing as a Straightforward and Versatile Fabrication Method for PDMS Molds." Polymers 15, no. 6 (2023): 1498. http://dx.doi.org/10.3390/polym15061498.

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3D printing is gaining traction in research and development as a way to quickly, cheaply, and easily manufacture polydimethylsiloxane (PDMS) molds. The most commonly used method is resin printing, which is relatively expensive and requires specialized printers. This study shows that polylactic acid (PLA) filament printing is a cheaper, more readily available alternative to resin printing, that does not inhibit the curing of PDMS. As a proof of concept, a PLA mold for PDMS-based wells was designed, and 3D printed. We introduce an effective method to smooth the printed PLA mold, based on chlorof
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35

Reynolds, T. P. S., H. C. Burridge, R. Johnston, et al. "Cell geometry across the ring structure of Sitka spruce." Journal of The Royal Society Interface 15, no. 142 (2018): 20180144. http://dx.doi.org/10.1098/rsif.2018.0144.

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For wood to be used to its full potential as an engineering material, it is necessary to quantify links between its cell geometry and the properties it exhibits at bulk scale. Doing so will make it possible to predict timber properties crucial to engineering, such as mechanical strength and stiffness, and the resistance to fluid flow, and to inform strategies to improve those properties as required, as well as to measure the effects of interventions such as genetic manipulation and chemical modification. Strength, stiffness and permeability of timber all derive from the geometry of its cells,
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Chaojun, Yang, Amberbir Wondimu, and Ayodeji Olalekan Salau. "Comparative study of passive magnetic bearing using four ring magnets: a critical review." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 2 (2024): 685. http://dx.doi.org/10.11591/ijpeds.v15.i2.pp685-695.

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Researchers on reducing energy losses caused by friction in small-scale wind turbines. This is crucial because a significant amount of energy is wasted due to friction in the main roller bearing. In order to overcome this, the concept of levitation has gained popularity. Levitation is achieved by employing the repelling forces between two opposing poles of a permanent magnet (PM), significantly reducing friction between the turbine stator and rotor. As a result, the overall energy production of the turbine increases. The use of passive permanent magnet bearings has several disadvantages, such
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37

Chaojun, Yang, Amberbir Wondimu, and Ayodeji Olalekan Salau. "Comparative study of passive magnetic bearing using four ring magnets: a critical review." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 2 (2024): 685–95. https://doi.org/10.11591/ijpeds.v15.i2.pp685-695.

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This is crucial because a significant amount of energy is wasted due to friction in the main roller bearing. In order to overcome this, the concept of levitation has gained popularity. Levitation is achieved by employing the repelling forces between two opposing poles of a permanent magnet (PM), significantly reducing friction between the turbine stator and rotor. As a result, the overall energy production of the turbine increases. The use of passive permanent magnet bearings has several disadvantages, such as limited load-bearing capacity and rigidity. To address these limitations, we conduct
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38

Araujo, Marcos E. V., Eloiny G. Barbosa, Marcio A. Martins, et al. "CFD Analysis of Different Aeration Ducts on Temperature and Airflow in Stored Maize." Journal of Agricultural Science 11, no. 2 (2019): 301. http://dx.doi.org/10.5539/jas.v11n2p301.

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The conditions of temperature and airflow distribution in the mass of stored grains are highly influenced by the configuration of the aeration ducts. However, silos are large structures, and the physical experiments on them become expensive and slow. Thus, this study aimed model and evaluate the temperature and airflow distribution in a maize mass, stored in a metal silo with different geometries of aeration ducts, using CFD (computational fluid dynamic). CFD was used to model and evaluate aeration ducts of square, ring, double bar and single bar shape. The proposed model was validated from ex
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39

Lam, Wai Kit, Anton Krynkin, and Shiu Keung Tang. "Topology optimization of array of split-ring resonators in two-dimensional acoustic waveguide for low-frequency transmission problems." Journal of the Acoustical Society of America 154, no. 4_supplement (2023): A189. http://dx.doi.org/10.1121/10.0023223.

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This work focuses on the topology optimization of an array of split-ring resonators to achieve nearly zero transmission in the low-frequency regime ranging from 500 Hz to 1000 Hz in 2D waveguide, under the condition of normal-incident plane wave and based on a homogenization scheme known as the Effective Medium Approach (EMA). The EMA transforms each individual resonator defined by its outer radius (rout), neck thickness (h), and the slit width (d), into a homogenous medium characterized by frequency-dependent physical parameters. The transmission coefficient (Tcoeff) of the array can thus be
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40

Wilson, Rob, Rohit Rao, Miloš Rydval, Cheryl Wood, Lars-Åke Larsson, and Brian H. Luckman. "Blue Intensity for dendroclimatology: The BC blues: A case study from British Columbia, Canada." Holocene 24, no. 11 (2014): 1428–38. http://dx.doi.org/10.1177/0959683614544051.

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Maximum latewood density (MXD) is a strong proxy of summer temperatures. Despite this, there is a paucity of long MXD chronologies in the Northern Hemisphere, which limits large-scale tree-ring-based reconstructions of past temperature which are dominated by ring-width (RW) data – a weaker temperature proxy at inter-annual time-scales. This paucity likely results from the relative expense of measuring MXD and the lack of laboratories with the facilities to measure it. Herein, we test the ability of a relatively new, less expensive, tree-ring parameter, Blue Intensity (BI), to act as a surrogat
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41

WANG, Jun, Zhi LI, Quan ZHU, et al. "A modified tricuspid valve annuloplasty technique for functional tricuspid regurgitation." Chinese Medical Journal 126, no. 18 (2013): 3634–38. http://dx.doi.org/10.3760/cma.j.issn.0366-6999.20122810.

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Background Functional tricuspid regurgitation often occurs in patients with concomitant left sided, valve disease. Several types of tricuspid valve annuloplasty have been described, but there is no consensus on the management of functional tricuspid regurgitation. We report a modified annuloplasty technique and compare its efficacy with the conventional Kay technique. Methods A retrospective review was made of 60 patients who received tricuspid valve annuloplasty (group A, modified method; group B, Kay technique) and the early and midterm outcomes of modified method and Kay technique were comp
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42

Niu, Xiang Yu, Tong Wang, and Kai Fan Zhang. "A Novel Network and its Application to Intelligent Community." Advanced Materials Research 622-623 (December 2012): 166–69. http://dx.doi.org/10.4028/www.scientific.net/amr.622-623.166.

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The level of performance of intelligent community is greatly promoted by the development of networking technologies. Some researchers obtained the achievement of intelligent community by utilizing complex algorithm and advanced equipment that makes the solution very expensive. Our research aims to find out a way to intellectualize residential community that is easy to implement, highly reliable and cost-effective. In this study, we present a system which consists of three layers based on the ring topology. For reliability and the ease of maintenance, we propose an automatic fault detection and
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43

Vukšić, Milan, Martina Kocijan, Lidija Ćurković, Tina Radošević, Damjan Vengust, and Matejka Podlogar. "Photocatalytic Properties of Immobilised Graphitic Carbon Nitride on the Alumina Substrate." Applied Sciences 12, no. 19 (2022): 9704. http://dx.doi.org/10.3390/app12199704.

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Textile industries significantly impact the contamination of wastewater. Conventional wastewater treatment methods consider the most common pollutants; however, they are very expensive and commonly produce toxic by-products. In the scientific community, advanced oxidation processes appear to be the most appealing, and a majority of the published work considers heterogeneous photocatalysis for the degradation of various toxic chemicals. For convenience, the reaction is performed directly in the water environment. In this work, a metal-free graphitic carbon nitride (g-C3N4) was prepared through
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44

Camacho, Jorge, Luis Medina, Jorge F. Cruza, José M. Moreno, and Carlos Fritsch. "Multimodal Ultrasonic Imaging for Breast Cancer Detection." Archives of Acoustics 37, no. 3 (2012): 253–60. http://dx.doi.org/10.2478/v10168-012-0033-4.

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Abstract Ultrasound is used for breast cancer detection as a technique complementary to mammography, the standard screening method. Current practice is based on reflectivity images obtained with conventional instruments by an operator who positions the ultrasonic transducer by hand over the patient’s body. It is a non-ionizing radiation, pain-free and not expensive technique that provides a higher contrast than mammography to discriminate among fluid-filled cysts and solid masses, especially for dense breast tissue. However, results are quite dependent on the operator’s skills, images are diff
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45

Khairedinova, Elzara А. "The Twelfth-Fourteenth-Century Finger-Rings and Signet-Rings from Eski-Kermen." Materials in Archaeology, History and Ethnography of Tauria, no. XXVI (2021): 205–28. http://dx.doi.org/10.37279/2413-189x.2021.26.205-228.

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This paper introduces into the scholarship finger-rings and signet-rings discovered on the plateau of Eski-Kermen during the excavations in recent years. The twelfth- and thirteenth-century finger- and signet-rings uncovered in the churches in quarters I and II were modest bronze ornaments of featuring décor belonging to the group of Byzantine-circle artefacts. Adult women often wore a pair or a set of three pieces of the ornaments of the kind. The fourteenth-century hand ornaments comprise only signet-rings, partially attributable to the Byzantine circle and partially to the artefacts made by
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46

Siregar, Hairani, and Fajar Utama. "Welfare of families who have children with disabilities through empowering the establishment of a curtain stitch business group." ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat 5, no. 2 (2020): 479–89. http://dx.doi.org/10.32734/abdimastalenta.v5i2.4709.

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This Community Service program is one of the efforts made so that families of children with disabilities have a good source of income. The care of children with disabilities is different from other ordinary children. Children with disabilities need special protection, especially from their families. Caring for children with disabilities is very expensive, until children with disabilities get their basic rights as children. With this service program, children with disabilities can grow and develop like other ordinary children. The training was conducted by forming a curtain-tailing group from t
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47

Lewerentz, Lars, and Ralf Schneider. "Simplified Optimization of the Magnetic Configuration of HEMP-Thrusters." Applied Sciences 13, no. 6 (2023): 3491. http://dx.doi.org/10.3390/app13063491.

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One type of ion thruster that has gained attention in recent years is the High Efficiency Multistage Plasma (HEMP) thruster. Optimizing the performance of these thrusters can be challenging due to the complexity of the underlying physics. Since the construction of new designs is expensive, cheaper methods for optimization, e.g., numerical optimization, are being sought. This paper presents a fast, analytical approach to finding realistic starting points for the magnetic geometry design of HEMP thrusters. First, a ratio of length to radius is presented, where the magnetic field is especially pa
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48

AYUSH, KUMAR. "To Develop the Orange Rind Powder for Identification of Latent Fingerprint." International Journal of Innovative Science and Research Technology 7, no. 11 (2022): 1500–1501. https://doi.org/10.5281/zenodo.7465858.

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Many Types of powder available in the market to identify the latent fingerprint some powders are toxic in our body to affect the body organ. I have attempt to use new powder for develop the latent fingerprint which are simple, non-toxic, less expensive than the commercially used fingerprint powder. These are easily available in every fruit shops. This type of work has not been reported previously and can provide the information to the investigators in cases of scarcity or non-availability of regular conventional fingerprint development powders. This is use simple and novice in the field in the
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49

Castellini, Mirko, Simone Di Prima, David Moret-Fernández, and Laurent Lassabatere. "Rapid and accurate measurement methods for determining soil hydraulic properties: A review." Journal of Hydrology and Hydromechanics 69, no. 2 (2021): 121–39. http://dx.doi.org/10.2478/johh-2021-0002.

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Abstract The determination of soil hydraulic properties is important in several environmental sciences but may be expensive and time consuming. Therefore, during the last decades, a great effort has been made in soil sciences to develop relatively easy, robust, and inexpensive methods for soil hydraulic characterization. In this manuscript, we reviewed and discussed different infiltrometer techniques in light of the available experimental applications. More specifically, we considered the simplified falling head (SFH) infiltrometer technique and the single-ring infiltration experiment of the B
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50

Grover, Ronald O., Xiaofeng Yang, Scott Parrish, et al. "CFD simulations of electric motor end ring cooling for improved thermal management." Science and Technology for Energy Transition 77 (2022): 17. http://dx.doi.org/10.2516/stet/2022015.

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Proper thermal management of an electric motor for vehicle applications extends its operating range. One cooling approach is to impinge Automatic Transmission Fluid (ATF) onto the rotor end ring. Increased ATF coverage correlates to enhanced heat transfer. Computational Fluid Dynamics (CFD) analytical tools provide a mechanism to assess motor thermal management prior to hardware fabrication. The complexity of the fluid flow (e.g., jet atomization, interface tracking, wall impingement) and heat transfer makes these simulations challenging. Computational costs are high when solving these flows o
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