Journal articles: 'Hollow Cored'

1

Gandhidasan, P., and K. N. Ramamurthy. "Thermal behaviour of hollow-cored concrete slabs." Applied Energy 19, no. 1 (1985): 41–48. http://dx.doi.org/10.1016/0306-2619(85)90038-8.

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Issa, Nader, Alexander Argyros, Martijn van Eijkelenborg, and Joseph Zagari. "Identifying hollow waveguide guidance in air-cored microstructured optical fibres." Optics Express 11, no. 9 (May 5, 2003): 996. http://dx.doi.org/10.1364/oe.11.000996.

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3

Arbelo, Yunieski, and Davide Bleiner. "Induction spectrometry using an ultrafast hollow-cored toroidal-coil (HTC) detector." Review of Scientific Instruments 88, no. 2 (February 2017): 024710. http://dx.doi.org/10.1063/1.4975402.

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4

Stagni, L. "Effective transverse elastic moduli of a composite reinforced with multilayered hollow-cored fibers." Composites Science and Technology 61, no. 12 (September 2001): 1729–34. http://dx.doi.org/10.1016/s0266-3538(01)00071-9.

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Engblom, John J., and Zhiyin Zheng. "Characterizing Stiffness and Strength Properties of Glass-Fiber Reinforced, Hollow-Cored Recycled Plastic Extrusions." Journal of Reinforced Plastics and Composites 19, no. 16 (November 2000): 1317–28. http://dx.doi.org/10.1106/h12e-6u6j-h7xl-dx5g.

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Orie, O., and B. Idolor. "Optimizing Compression Zone of Flanged Hollow Cored Concrete Beams Using Moment of Inertia Theory." Nigerian Journal of Technology 34, no. 2 (March 29, 2015): 217. http://dx.doi.org/10.4314/njt.v34i2.1.

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Mihăilescu, Dănuţ, Marius Cornel Gheonea, and Bogdan Georgescu. "Determining the Coefficients of Fusion and of Weld Deposition at Mechanized Mag-C Welding with Solid Wire and Cored Wires." Applied Mechanics and Materials 657 (October 2014): 301–5. http://dx.doi.org/10.4028/www.scientific.net/amm.657.301.

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In the case of the MAG welding of carbon and low-alloyed steels wires or hollow wires with (rutilic or basic) flux with metallic powder or self-protection are used. In indoors weldings huge quantities of smoke, gases, dust and particles in suspension, etc. get accumulated. These noxious substances produced during the welding process may severely affect the welders health. To improve the welders working conditions, on an international scale, the following are used: welding masks with self-obscurazation and air control; noxious substances vacuum cleaners fitted with filters; MAG welding pistols with gase and smoke absorbing devices. For the improvement of the welders working conditions, producers of welding materials invented hollow wires with (rutilic flux or with metallic powder) with a smoke-reduced emission [1,2,3,4,5].

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8

Pan, Chun Xu, Ling Min Liao, and Ya Li Hu. "Functions and Morphology of Metal Lead Addition to Ancient Chinese Bronzes." Advanced Materials Research 26-28 (October 2007): 523–26. http://dx.doi.org/10.4028/www.scientific.net/amr.26-28.523.

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The typical morphology of metal lead (Pb) in ancient bronzes made in the Spring-Autumn Warring States Period (770 B.C. –221 B.C.), China, was examined by using electron microscopic techniques. We propose that the main purposes for adding metallic Pb in a large quantity into ancient bronzes such as arrows and ritual vessel-Ding were for increasing weight and economical reasons. SEM observations from the fracture surface of the bronzes revealed that the Pb particle possessed a “hollow–cored bubble” structure, which was formed due to absorbing casting gases during solidification and therefore indirectly eliminated the casting porosity and loosen.

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Werner, Patricia A., and Lynda D. Prior. "Tree-piping termites and growth and survival of host trees in savanna woodland of north Australia." Journal of Tropical Ecology 23, no. 6 (October 29, 2007): 611–22. http://dx.doi.org/10.1017/s0266467407004476.

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Most trees in the eucalypt savannas of Australia have hollow cores, or pipes, caused by termite activity, yet little is known about their effect on tree growth or survival. Five hundred and forty-one trees with known growth and survival histories were cored to determine pipe diameters in wooded savanna of Kakadu National Park, north Australia. Generalized linear modelling and multi-model inference was used to analyse frequency and degree of piping relative to initial tree diameter at breast height (dbh), eco-taxonomic group or species of eucalypt. Growth (dbh increment) and survival (4 y) were analysed relative to initial tree size, pipe ratio (pipe diameter:dbh) and eco-taxonomic group. The frequency of piping was strongly dependent on dbh, increasing with size of tree, and was highest in eucalypts. Growth and survival of eucalypts increased with tree diameter and decreased with pipe ratio. For example, from modelled data, 10-cm-diameter trees without pipes grew 0.14 cm y−1 with 85% survival vs. 10-cm trees with pipe ratios of 0.60 which had near-zero growth and only 46% survival. Comparing 40-cm-diameter trees without pipes to those having pipe ratios of 0.80, growth was 0.22 vs. 0.05 cm y−1, with little difference in survival, 97–99%, respectively. Contrary to the suggestion that tree hollows are an adaptive trait whereby trees benefit by the release of nutrients, in the north Australian eucalypt savannas the net effect of termite piping on individual tree growth and survival was negative.

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Clarke, Robin E., Bahman Shabani, and Gary Rosengarten. "Thermal analysis of a non-homogeneous insulating panel." Journal of Building Physics 42, no. 1 (July 3, 2017): 16–37. http://dx.doi.org/10.1177/1744259117716985.

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This article describes heat flow meter measurements and transient thermal modelling (using ANSYS) of a webbed, hollow-cored panel located between silicone sponge buffer materials chosen to provide boundary conditions comparable to standard surface coefficients. Panel surface temperatures were also measured at eight locations to record the thermal measurement as a temperature step function following isothermal stabilization. An uninsulated configuration was studied as well as cases with different levels of bulk insulation filling the panel cores. Measured and modelled temperature–time plots agreed well after corrections for web and airspace thermal conductivity. Modelled spatial variation in heat flow exceeded 200% for one insulated case but was only about 2% for the uninsulated panel. Modelled values for heat flux and overall thermal resistance agreed well with standard analytical calculations. However, heat flows indicated by the apparatus were consistently higher than the modelled and calculated values by up to 8%, expected to be due at least partially to specimen non-homogeneity. Nevertheless, results suggest a useful role for the apparatus in providing temperature measurement under controlled conditions, helping to validate thermal modelling as a potential alternative to hot box measurement for non-homogeneous assemblies.

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11

KONISHI, Kazuhiro, Ai FUJIWARA, Norihiko MIURA, and Yukikazu TSUJI. "WATER PERMEABILITY EVALUATION OF HOLLOW CYLINDRICAL REINFORCED CONCRETE STRUCTURE BY MEANS OF WATER PERMEABILITY TEST OF CORED SAMPLES." Doboku Gakkai Ronbunshu, no. 788 (2005): 13–26. http://dx.doi.org/10.2208/jscej.2005.788_13.

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12

Zheng, Zhiyin, and John J. Engblom. "Fiber micro-buckling of continuous glass-fiber reinforced hollow-cored recycled plastic extrusions under long-term flexural loads." Composite Structures 56, no. 2 (May 2002): 157–64. http://dx.doi.org/10.1016/s0263-8223(01)00186-6.

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13

Zheng, Zhiyin, and John J. Engblom. "Fiber Local Micro Buckling of Continuous Glass-Fiber Reinforced Rectangular Hollow-Cored Commingled Recycled, Plastic Extrusions under Bending." Journal of Reinforced Plastics and Composites 21, no. 6 (April 2002): 517–31. http://dx.doi.org/10.1177/0731684402021006831.

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14

Fu, Jinmin, and Peter H. Dernoeden. "Carbohydrate Level, Photosynthesis, and Respiration in Creeping Bentgrass as Influenced by Spring and Summer Coring." Journal of the American Society for Horticultural Science 134, no. 1 (January 2009): 41–47. http://dx.doi.org/10.21273/jashs.134.1.41.

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Carbohydrates provide energy required to maintain healthy plant growth in summer. Coring is performed periodically on creeping bentgrass (Agrostis stolonifera L.) putting greens for numerous reasons; however, its impact on carbohydrate metabolism in creeping bentgrass is unknown. The objectives of this 2-year field study were to examine the effects of coring on rates of photosynthesis (Pn) and whole plant respiration (Rw), and to quantify water-soluble carbohydrates [WSC (i.e., glucose, fructose, and sucrose)], storage carbohydrates [SC (i.e., fructan and starch], and total nonstructural carbohydrates [TNC (i.e., WSC + SC)] in creeping bentgrass leaves and roots during the summer. The study site was ‘Providence’ creeping bentgrass grown on a sand-based root zone and was maintained as a putting green. Three coring treatments were assessed as follows: spring-only coring, spring plus three summer corings, and a noncored control. Pn and Rw were measured about 21 d following coring with hollow tines. Pn and Rw rates generally were similar among all three coring treatments in both years. Hence, summer coring had no apparent negative impact on Pn or Rw. Leaf and root WSC, SC, and TNC levels were similar among coring treatments throughout the summer of each year. However, root TNC levels were lower in July of each year in spring plus summer-cored bentgrass versus other coring treatments. By September, leaves and roots from spring plus summer-cored creeping bentgrass had higher TNC levels when compared with spring-only or noncored bentgrass. Leaf and root SC levels from spring plus summer-cored bentgrass were also higher in September than were observed in noncored bentgrass. Spring plus summer coring benefited creeping bentgrass by promoting an accumulation of carbohydrates in late summer, which could assist plants in their recovery from summer stresses.

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15

Li, Yazhou, and Li Dong. "Adaptability analysis of load limit standard for prestressed hollow slab bridge." E3S Web of Conferences 143 (2020): 01022. http://dx.doi.org/10.1051/e3sconf/202014301022.

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In recent years, with the rapid development of social economy and highway transportation, the phenomenon of overweight transportation is increasingly serious, which is the main reason for the frequent occurrence of bridge collapse accidents in our country, causing heavy economic losses and casualties to the society.Due to the lack of unified bridge load limit management standards at the national level, it is difficult to fundamentally improve the adverse situation of bridge overload operation by relying on the existing overlimit management measures.Based on this background, we made the following work:(1) load carrying capacity check and calculation of prestressed hollow slab bridge: check whether the bridge used meets the requirements of the specification, so as to provide a reliable engineering basis for the analysis of load limit value in the following paper.According to the 04 specification, the load carrying capacity of the car is checked and calculated to verify whether the bridge meets the design requirements of the load carrying capacity.Then, the mid-span deflection of the bridge and the crack resistance of the main beam are checked to determine whether the bridge meets the design requirements in the normal limit state of use.(2) prestressed hollow slab bridge limit load values adaptability analysis first, calculates the design safety grade level on the limit load of prestressed cored slab jointless security levels of primary, secondary and tertiary limit load vehicle load effect, on this basis, from bearing capacity limit state and serviceability limit state analysis of the bridge limit load values of adaptation.

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16

Sato, Shunichi, Hiroshi Ashida, Tsunenori Arai, Yi-Wei Shi, Yuji Matsuura, and Mitsunobu Miyagi. "Vacuum-cored hollow waveguide for transmission of high-energy, nanosecond Nd:YAG laser pulses and its application to biological tissue ablation." Optics Letters 25, no. 1 (January 1, 2000): 49. http://dx.doi.org/10.1364/ol.25.000049.

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17

Eleuterio, Ana Alice, Maria Aparecida de Jesus, and Francis E. Putz. "Stem Decay in Live Trees: Heartwood Hollows and Termites in Five Timber Species in Eastern Amazonia." Forests 11, no. 10 (October 13, 2020): 1087. http://dx.doi.org/10.3390/f11101087.

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Research Highlights: Tree size and wood characteristics influenced the susceptibility of five Amazonian timber tree species to heartwood decay and colonization by termites. Termites occurred in the heartwoods of 43% of the trees, with Coptotermes testaceus the most abundant species. Background and Objectives: Hollows and rotten cores in the stems of living trees have ecological and economic impacts in forests managed for timber. The decision on whether to cut or maintain hollow trees in such forests must account for the susceptibility of different tree species to decay. We investigated tree and wood characteristics of living trees of five commercial timber species in the eastern Amazon that influenced the likelihood of heartwood decay and the occurrence of termite nests inside the rotten cores. Materials and Methods: We used Pearson’s correlations and one-way analysis of variance (ANOVA) to explore relationships among tree basal area and hollow area. We used principal components analysis (PCA) to analyze the variation of wood anatomical traits, followed by a linear regression to explore the relationships between PCA scores, and heartwood hollow area. We used a logistic model to investigate if the probability the occurrence of colonies of C. testaceus inside tree cores varied with tree and species characteristics. Results: Heartwood hollow areas increased with stem basal area. Larger hollows were more likely to occur in species with higher vessel and ray densities, and smaller diameter vessels. Termites occurred in the hollows of 43% of the trees sampled, with C. testaceus the most common (76%). The probability of encountering termite nests of C. testaceus varied among tree species and was positively related to wood density. Conclusions: This study shows that given the increased likelihood of stem hollows and rotten cores in large trees, tree selection criteria in managed tropical forests should include maximum cutting sizes that vary with the susceptibility of different tree species to stem decay.

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18

Zacharuk, R. Y., E. S. Leung, and J. C. Jensen. "Viruslike particles in cells associated with sensilla in head appendages of a dytiscid beetle." Canadian Journal of Zoology 70, no. 1 (January 1, 1992): 67–70. http://dx.doi.org/10.1139/z92-010.

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Two types of viruslike particles (VLP) were noted in the cytoplasm of cells associated with sensilla on the antennae and labial palps of the diving beetle Graphoderus occidentalis Horn. The most common "hollow" particle was 30–32 nm in diameter with an electron-dense shell about 8 nm thick and, in some cases, a dense core granule about 5.6 nm in diameter. These VLP were always tightly packed in orderly arrays in apparently icosahedral clusters. Such clusters occurred in the perikarya of multiterminal type II neurons and glial cells in the labial nerves, bipolar type I neurons and inner sheath cells of mechano- and chemo-sensilla on both appendages, adjacent epidermal cells, and an axon from an antennal sensillum. A second type of VLP was dense-cored and about 22 nm in diameter. This type was scattered individually or in loose, unordered clusters in a type I sensillar neuron. Both VLP types were closely associated with ribosomes. Some minor cytopathic changes in the contents of cells containing VLP, and the occurrence of VLP as manifestations of physiological stress rather than as infective virions, are discussed.

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19

Chen, Chih-ming, and Po-yuan Shih. "A peculiar composite structure of carbon nanofibers growing on a microsized tin whisker." Journal of Materials Research 23, no. 10 (October 2008): 2668–73. http://dx.doi.org/10.1557/jmr.2008.0326.

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In this work, we report a method to synthesize a peculiar composite structure of tubular carbon nanofibers (CNFs) growing on a microsized tin (Sn) whisker. The material used is a commercially available copper clad laminate (CCL). The CCL is composed of a surface copper (Cu) layer and a bottom polymer (phenol-formaldehyde resin) board, in which the polymer board is used as the carbon source. Using lithography and lift-off techniques, the Cu layer was patterned to a stripelike Cu trace. A Sn thin film was then evaporated on the polymer board near the Cu trace. To release the residue stress that resulted from the evaporation; Sn whiskers with diameters of about 2 to 5 μm were formed on the Sn thin film after evaporation. By passing an electric current through the Cu trace, the Cu trace was heated due to Joule heating and served as a heating source for the thermal decomposition of phenol-formaldehyde. After heat treatment, the CNFs grew on the surface of the Sn whiskers with tubular hollow-cored structure. The diameter of the tubular CNFs is about hundreds of nanometers and their length can reach several micrometers. The growth mechanism of the brushlike composite structure is also discussed.

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20

VU, Truong V., Hideyuki TAKAKURA, John C. WELLS, and Takashi MINEMOTO. "OS21F069 Experimental Investigation on Formation of Single-Core Hollow Drops from a Hollow Jet Issuing into Air." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2011.10 (2011): _OS21F069——_OS21F069—. http://dx.doi.org/10.1299/jsmeatem.2011.10._os21f069-.

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21

Vukmirovic, Miomir, Zhang Yu, Jia Wang, David Buceta, Lijun Wu, and Radoslav Adzic. "Pt monolayer shell on hollow Pd core electrocatalysts: Scale up synthesis, structure, and activity for the oxygen reduction reaction." Journal of the Serbian Chemical Society 78, no. 12 (2013): 1983–92. http://dx.doi.org/10.2298/jsc131024117v.

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We report on synthesis, characterization and the oxygen reduction reaction (ORR) kinetics of Pt monolayer shell on Pd(hollow), or Pd-Au(hollow) core electrocatalysts. Comparison between the ORR catalytic activity of the electrocatalysts with hollow cores and those of Pt solid and Pt hollow nanoparticles has been obtained using the rotating disk electrode technique. Hollow nanoparticles were made using Ni or Cu nanoparticles as sacrificial templates. The Pt ORR specific and mass activities of the electrocatalysts with hollow cores were found considerably higher than those of the electrocatalysts with the solid cores. We attribute this enhanced Pt activity to the smooth surface morphology and hollow-induced lattice contraction, in addition to the mass-saving geometry of hollow particles.

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22

Renkas, A. A. "FIRE RESISTANCE PROVIDING OF HOLLOW‐CORE CONCRETE SLABS USING SHEET BUILDING MATERIALS." Fire Safety, no. 34 (July 19, 2019): 72–77. http://dx.doi.org/10.32447/20786662.34.2019.12.

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Introduction. This paper deals with the analysis of world experience in fire resistance providing of hollow‐core concrete slabs. To protect concrete structures are used many structural applications: thermal coatings and materials. The research first analyzes main methods and hypothesis using to make temperature analysis of solution fire resistance of concrete structures. Problem of making temperature analysis of hollow‐core concrete slabs are nonlinear thermal material properties and radiation heat transfer in the hollow-cores. The aim of this paper is to establish the temperature distribution in hollow‐core concrete slab considering radiation heat transfer in the hollow-cores in case of fire in compartment that is spreading by standard temperature-time curve. In addition, the aim is to substantiate the possibility of using gypsum panels to provide fire resistance of hollowcore concrete slabs. Material statement. The paper reports the results of modeling the process of heat transfer in hollow‐core concrete slab, between compartment space and slab surface and in hollow‐cores. To calculate temperature fields in hollow‐core concrete slab considering nonlinear thermal material properties and radiation heat transfer in the hollow-cores was used finite element model. At addition, the results of finite elements simulations show temperature fields in hollow‐core concrete slab and gypsum panels that installed under concrete slab. Scientific novelty. The paper reports results of theoretic substantiated of possibility of using gypsum panels to protect of hollow‐core concrete slabs considering nonlinear thermal material properties, radiation heat transfer between surfaces and radiation heat transfer in the hollow-cores. The results indicate that using gypsum panels to protect of hollow‐core concrete slabs reduces speed heating of concrete elements to critical temperatures that increase fire resistance of hollow‐core concrete slabs to 20.4 %.

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23

Vu, Truong V., Hideyuki Takakura, John C. Wells, and Takashi Minemoto. "OS21-1-1 Experimental Investigation on Formation of Single-Core Hollow Drops from a Hollow Jet Issuing into Air." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2011.10 (2011): _OS21–1–1—. http://dx.doi.org/10.1299/jsmeatem.2011.10._os21-1-1-.

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24

Gong, Liping, Xiaohe Zhang, Zhuqing Zhu, Guanghao Rui, Jun He, Yiping Cui, and Bing Gu. "Femtosecond laser trapping dynamics of two-photon absorbing hollow-core nanoparticles." Chinese Optics Letters 18, no. 8 (2020): 081901. http://dx.doi.org/10.3788/col202018.081901.

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25

Hirth, J. P., and D. J. Srolovitz. "Shape of hollow dislocation cores." Philosophical Magazine A 69, no. 2 (February 1994): 341–47. http://dx.doi.org/10.1080/01418619408244348.

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Huo, Zhuang, Exian Liu, and Jianjun Liu. "Hollow-core photonic quasicrystal fiber with high birefringence and ultra-low nonlinearity." Chinese Optics Letters 18, no. 3 (2020): 030603. http://dx.doi.org/10.3788/col202018.030603.

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27

Jin Xiaoling, 靳晓玲, 王有为 Wang Youwei, 孙兵 Sun Bing, 张祖兴 Zhang Zuxing, and 陈明阳 Chen Mingyang. "环形中空光子晶体光纤用于多阶涡旋光传输." Chinese Journal of Lasers 48, no. 11 (2021): 1105001. http://dx.doi.org/10.3788/cjl202148.1105001.

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28

Yin, D., H. Schmidt, J. P. Barber, and A. R. Hawkins. "Integrated ARROW waveguides with hollow cores." Optics Express 12, no. 12 (2004): 2710. http://dx.doi.org/10.1364/opex.12.002710.

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LIU, X. J., D. XU, Z. Y. WANG, G. W. YU, G. H. ZHANG, X. Q. WANG, and L. Y. ZHU. "STUDY OF THE SURFACE MORPHOLOGY OF THE {101} CLEAVAGE PLANES OF LATF CRYSTALS BY ATOMIC FORCE MICROSCOPY." Surface Review and Letters 14, no. 03 (June 2007): 431–34. http://dx.doi.org/10.1142/s0218625x07009566.

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Surface morphology of the {101} freshly cleaved planes of L-arginine trifluoroacetate crystals grown from aqueous solutions have been studied by atomic force microscopy. Various step patterns are described and discussed. Moreover, the dislocations are not easily found and all of them are devoid of hollow cores on the emergence points. The reason may be that the stress field is too weak to generate hollow cores.

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Simpson, Alex, and Matt Visser. "Regular Black Holes with Asymptotically Minkowski Cores." Universe 6, no. 1 (December 31, 2019): 8. http://dx.doi.org/10.3390/universe6010008.

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Standard models of “regular black holes” typically have asymptotically de Sitter regions at their cores. Herein, we shall consider novel “hollow” regular black holes, those with asymptotically Minkowski cores. The reason for doing so is twofold: First, these models greatly simplify the physics in the deep core, and second, one can trade off rather messy cubic and quartic polynomial equations for somewhat more elegant special functions such as exponentials and the increasingly important Lambert W function. While these “hollow” regular black holes share many features with the Bardeen/Hayward/Frolov regular black holes, there are also significant differences.

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Zang, Jun, Taihua An, Yajie Dong, Xiaoliang Fang, Mingsen Zheng, Quanfeng Dong, and Nanfeng Zheng. "Hollow-in-hollow carbon spheres with hollow foam-like cores for lithium–sulfur batteries." Nano Research 8, no. 8 (August 2015): 2663–75. http://dx.doi.org/10.1007/s12274-015-0773-3.

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Gu, Wen Juan, Ying Li, and Xiao Hui Zhang. "Preparation of Silica Hollow Spheres Used as Filler for Paper." Applied Mechanics and Materials 200 (October 2012): 339–42. http://dx.doi.org/10.4028/www.scientific.net/amm.200.339.

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Silica of hollow structure exhibits a number of special characteristic. In this paper, a new way to prepare hollow silica spheres which can be used as filler for paper was reported. In this approach, when silica shells were coated on polyvinylacetate (PVAc) template particles by the sol-gel method, the PVAc cores would be dissolved synchronously, forming hollow spheres. Neither additional dissolution nor a calcination process was needed to remove the PVAc cores. The morphology of the hollow silica spheres was also characterized by TEM. It was shown that the hollow silica spheres with 130-400nm in diameter and 15-35nm in the shell thickness could be synthesized. The possible formation mechanism was also brought forward. The possibility and potential advantages in usage as filler for paper were analyzed theoretically. We confer that this filler can improve the printability of the paper, and reduce its density compared with traditional fillers.

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Jiarong Zheng, Jiarong Zheng, Yongqin Yu Yongqin Yu, Chenlin Du Chenlin Du, Peiguang Yan Peiguang Yan, Mei Pan Mei Pan, Jishun Wang Jishun Wang, and Zhuoye Liu Zhuoye Liu. "Metal-organic-coordinated supramolecular material filled hollow core photonic crystal fiber for temperature sensor." Chinese Optics Letters 10, s2 (2012): S20611–320613. http://dx.doi.org/10.3788/col201210.s20611.

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Zhang, Zhe, Yingying Wang, Min Zhou, Jun He, Changrui Liao, and Yiping Wang. "Recent advance in hollow-core fiber high-temperature and high-pressure sensing technology [Invited]." Chinese Optics Letters 19, no. 7 (2021): 070601. http://dx.doi.org/10.3788/col202119.070601.

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Xu, Jun, Yaobo Wu, Xiang Gao, Huaping Wu, Steven Nutt, and Sha Yin. "Design of composite lattice materials combined with fabrication approaches." Journal of Composite Materials 53, no. 3 (August 13, 2018): 393–404. http://dx.doi.org/10.1177/0021998318785710.

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Lattice materials can be designed through their microstructure while concurrently considering fabrication feasibility. Here, we propose two types of composite lattice materials with enhanced resistance to buckling: (a) hollow lattice materials fabricated by a newly developed bottom-up assembly technique and the previously developed thermal expansion molding technique and (b) hierarchical lattice materials with foam core sandwich trusses fabricated by interlocking assembly process. The mechanical performance of sandwich structures featuring the two types of lattice cores was tested and analyzed theoretically. For hollow lattice core material, samples from two different fabrication processes were compared and both failed by nodal rupture or debonding. In contrast, hierarchical lattice structures failed by shear buckling without interfacial failure in the sandwich struts. Calculations using established analytical models indicated that the shear strength of hollow lattice cores could be optimized by judicious selection of the thickness of patterned plates. Likewise, the shear strength of hierarchical foam core truss cores could be maximized (with minimal weight) through design of truss geometry. The bottom-up assembly technique could provide a feasible way for mass production of lattice cores, but the design about how to assembly is critical. Hierarchical lattice cores with foam sandwich trusses should be a suitable choice for future lightweight material application.

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Yang, Fu, Saifu Long, Shijian Zhou, Xiaoming Li, Xianfeng Liu, Shuying Gao, and Yan Kong. "Aminosilane decorated carbon template-induced in situ encapsulation of multiple-Ag-cores inside mesoporous hollow silica." RSC Advances 6, no. 37 (2016): 30852–61. http://dx.doi.org/10.1039/c6ra05494c.

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A cores@shell structure of microreactor with a well-dispersed active phase of multiple free-Ag-cores, hollow cavity and protective mesoporous shell was prepared by a simple and novel construction approach.

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37

Mangan, Brian J., Alistair C. Muir, and Jonathan C. Knight. "Photonic BandGap Fiber With Multiple Hollow Cores." Journal of Lightwave Technology 28, no. 9 (May 2010): 1287–90. http://dx.doi.org/10.1109/jlt.2010.2043640.

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38

Clough, Eric C., Jie Ensberg, Zak C. Eckel, Christopher J. Ro, and Tobias A. Schaedler. "Mechanical performance of hollow tetrahedral truss cores." International Journal of Solids and Structures 91 (August 2016): 115–26. http://dx.doi.org/10.1016/j.ijsolstr.2016.04.006.

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39

Barber, J. P., E. J. Lunt, Z. A. George, Dongliang Yin, H. Schmidt, and A. R. Hawkins. "Integrated hollow waveguides with arch-shaped cores." IEEE Photonics Technology Letters 18, no. 1 (January 2006): 28–30. http://dx.doi.org/10.1109/lpt.2005.859990.

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Cai, Hao, Xingtao Yu, Qian Chu, Zhiqiang Jin, Bo Lin, and Guanghui Wang. "Hollow-core fiber-based Raman probe extension kit for in situ and sensitive ultramicro-analysis." Chinese Optics Letters 17, no. 11 (2019): 110601. http://dx.doi.org/10.3788/col201917.110601.

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Matějec, Vlastimil, Ivan Kasik, Ondrej Podrazky, and Ivo Barton. "Bragg Fibers for Absorption-Based Sensing." Conference Papers in Science 2015 (April 1, 2015): 1–6. http://dx.doi.org/10.1155/2015/954539.

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Photonic band gap Bragg fibers can be employed for delivery of high powers in medicine, lighting and heating systems, electricity production, and the development of optical sensors of physical and chemical variables. In this paper, results of testing Bragg fibers with hollow cores for pH detection based on absorbance measurements on solutions filled in the cores. Bragg fibers with claddings of three pairs of high- and low-index layers and hollow cores of 70 µm in diameter were fabricated. Photonic band gap bands of the fibers were estimated theoretically. Aqueous solutions of methyl orange (MO) and hydrochloric acid and bromothymol blue (BTB) in Sörensen buffers were filled into the cores and spectra of MO and BTB were measured for different pH. Calibration curves typical for optical pH sensors were derived from the measured spectra with a reproducibility of about 10%.

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Yun, Su-Ryeon, Gyeong-Ok Kim, Chan Woo Lee, Nam-Ju Jo, Yongku Kang, and Kwang-Sun Ryu. "Synthesis and Control of the Shell Thickness of Polyaniline and Polypyrrole Half Hollow Spheres Using the Polystyrene Cores." Journal of Nanomaterials 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/894539.

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Polyaniline (Pani) and polypyrrole (Ppy) half hollow spheres with different shell thicknesses were successfully synthesized by three steps process using polystyrene (PS) as the core. The PS core was synthesized by emulsion polymerization. Aniline and pyrrole monomers were polymerized on the surface of the PS core. The shells of Pani and Ppy were fabricated by adding different amounts of aniline and pyrrole monomers. PS cores were dissolved and removed from the core shell structure by solvent extraction. The thicknesses of the Pani and Ppy half hollow spheres were observed by FE-SEM and FE-TEM. The chemical structures of the Pani and Ppy half hollow spheres were characterized by FT-IR spectroscopy and UV-Vis spectroscopy. The shell thicknesses of the Pani half hollow spheres were 30.2, 38.0, 42.2, 48.2, and 52.4 nm, while the shell thicknesses of the Ppy half hollow spheres were 16.0, 22.0, 27.0, and 34.0 nm. The shell thicknesses of Pani and Ppy half hollow spheres linearly increased as the amount of the monomer increased. Therefore, the shell thickness of the Pani and Ppy half hollow spheres can be controlled in these ranges.

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Haapamaki, C. M., J. Flannery, G. Bappi, R. Al Maruf, S. V. Bhaskara, O. Alshehri, T. Yoon, and M. Bajcsy. "Mesoscale cavities in hollow-core waveguides for quantum optics with atomic ensembles." Nanophotonics 5, no. 3 (August 1, 2016): 392–408. http://dx.doi.org/10.1515/nanoph-2015-0026.

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AbstractSingle-mode hollow-core waveguides loaded with atomic ensembles offer an excellent platform for light–matter interactions and nonlinear optics at low photon levels. We review and discuss possible approaches for incorporating mirrors, cavities, and Bragg gratings into these waveguides without obstructing their hollow cores. With these additional features controlling the light propagation in the hollow-core waveguides, one could potentially achieve optical nonlinearities controllable by single photons in systems with small footprints that can be integrated on a chip. We propose possible applications such as single-photon transistors and superradiant lasers that could be implemented in these enhanced hollow-core waveguides.

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Song, Ji Rui, Li Xiong Wen, Jian Feng Chen, and Hao Min Ding. "Synthesis and Characterization of Hollow Silica via PMMA as Template." Advanced Materials Research 11-12 (February 2006): 551–54. http://dx.doi.org/10.4028/www.scientific.net/amr.11-12.551.

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Submicrosized porous hollow silica spheres with a diameter of 350 nm and a shell thickness of approximately 10 nm were synthesized by a hydrothermal method using PMMA hollow particles as template. Through the hydrolysis of TEOS, a continuous and uniform coating of SiO2 was deposited over the surface of PMMA cores to form the core-shell structures. After calcining to remove the template, a pure hollow silica structure with holes in the shells was obtained. The as-prepared hollow products were characterized with TEM, SEM, EDS, BET and FT-IR. Its large surface area and hollow morphology will make this new material a promising agent for the applications of catalysts, controlled drug delivery and etc.

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Wang, Hong Feng, Zhi Qi Wang, Ai Ping Wang, Zhi Bin Zhu, and Yan Sheng Yin. "A Green Approach to Preparing Nanosized Hollow Silica Microspheres with Waste Polystyrene." Advanced Materials Research 79-82 (August 2009): 1511–14. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.1511.

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An attempt was made to prepare hollow silica microspheres by an oil-in-water emulsion which proposed to use waste polystyrene organic solution as oil phase. Effects of the kinds and amounts of surfactants and the concentration of waste polystyrene solution on the nanosized hollow silica microspheres were studied. The prepared hollow silica microspheres were characterized by TEM, XRD, TG-DTA and particle size distribution analyzer. The experimental results showed that the waste polystyrene organic solution was successfully treated as oil core and the cores could be removed at about 350°C. Meanwhile, the obtained hollow microspheres were amorphous with an average particle size of 40nm. The hollow silica microspheres could be obtained with the selected surfactant.

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Zhu, Yi-An, Zi-Jun Wang, Hong-Ye Cheng, Qin-Min Yang, Zhi-Jun Sui, Xing-Gui Zhou, and De Chen. "Decoding structural complexity in conical carbon nanofibers." Physical Chemistry Chemical Physics 19, no. 22 (2017): 14555–65. http://dx.doi.org/10.1039/c7cp01533j.

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Jiang Shoulin, 姜寿林, 靳伟 Jin Wei, 陈非凡 Chen Feifan, 高寿飞 Gao Shoufei, and 何海律 Ho Hoi Lut. "基于空芯光纤光热光谱技术的高灵敏度CO2检测." Acta Optica Sinica 41, no. 13 (2021): 1306004. http://dx.doi.org/10.3788/aos202141.1306004.

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You Yong, 游永, 郭慧毅 Guo Huiyi, 李伟 Li wei, 柯一礼 Ke Yili, 段少祥 Duan Shaoxiang, 王志 Wang Zhi, and 刘艳格 Liu Yange. "空芯光子带隙光纤中的表面模共振耦合效应及高温传感特性." Acta Optica Sinica 41, no. 13 (2021): 1306005. http://dx.doi.org/10.3788/aos202141.1306005.

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Trofimov, Alexander, Lev Pleshkov, and Haslen Back. "Hollow glass microspheres for high strength composite cores." Reinforced Plastics 50, no. 7 (July 2006): 44–50. http://dx.doi.org/10.1016/s0034-3617(06)71074-8.

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Barber, J. P., D. B. Conkey, J. R. Lee, N. B. Hubbard, L. L. Howell, Dongliang Yin, H. Schmidt, and A. R. Hawkins. "Fabrication of hollow waveguides with sacrificial aluminum cores." IEEE Photonics Technology Letters 17, no. 2 (February 2005): 363–65. http://dx.doi.org/10.1109/lpt.2004.839446.

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Journal articles on the topic 'Hollow Cored'

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