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Artykuły w czasopismach na temat „Cube partiel”

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Data publikacji: 25 maja 2024

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1

Chepoi, Victor, Kolja Knauer i Tilen Marc. "Hypercellular graphs: Partial cubes without Q3− as partial cube minor". Discrete Mathematics 343, nr 4 (kwiecień 2020): 111678. http://dx.doi.org/10.1016/j.disc.2019.111678.

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D, Raghavendra Prasad H., Nagaraj Sitaram, Pavan P. S i Dushyanth V. BABU R. "Economical Concrete Cube Prepared Using Different Types of Nano-Material for Sustainable Construction". ECS Transactions 107, nr 1 (24.04.2022): 10509–17. http://dx.doi.org/10.1149/10701.10509ecst.

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In this research work concrete cube has been prepared by doing partial replacement for cement using nano materials like Multi-Walled Carbon Nano Tubes (MWCNTs), titanium dioxide (TiO2), and copper oxide (CuO) at different percentages like 0.1, 0.25, and 0.5%. Basic test has been done for materials and fresh concrete, followed by compressive strength test for concrete cubes. MWCNT gives more result compare to TiO2 and CuO. Just to reduce cement usage, fly ash has been used by keeping the compressive strength and the amount of nano materials as constant up to 35% of MWCNTs, TiO2, and CuO, with fly ash replaced for cement to obtain the normal strength. Cost analysis has been done to find out the economic efficiency of nano material concrete cube due to which TiO2 with fly ash cost 14.45Rs to prepare single cube, as MWCNTs and CuO with fly ash cost 726.4 and 17.64Rs to prepare single concrete cube. Almost TiO2 cube preparation took 10% reduction for the preparation of concrete cube compare to normal concrete cube has taken 15.96Rs. So we concluded that TiO2 with fly ash nano material concrete is the economical efficient concrete compared to MWCNTs and CuO with fly ash.

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3

Chellew, Guylaine, i M. A. Persinger. "Women but Not Men Exhibit a Positive Correlation between Complex Partial Epileptic-Like Signs and Tactile-Visual Cross-Modal Matching: Implications for Hemispheric Intercalation". Perceptual and Motor Skills 78, nr 3_suppl (czerwiec 1994): 1312–14. http://dx.doi.org/10.2466/pms.1994.78.3c.1312.

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16 right-handed men and 19 women were asked to feel various sized wooden cubes with the dominant hand for 2 sec. (without visual feedback) and then to select this cube from a random visual arrangement of cubes (tactile-visual matching) after a brief delay. The accuracy for men and women for this task did not differ significantly; however, the accuracy was significantly correlated ( rho = 0.61) with a history of complex partial epileptic-like signs for the women but not for the men. The results support the hypothesis that elevated scores for complex partial epileptic-like signs in right-handed women enhance their capacity to associate different perceptual domains of the same stimuli because there is elevated activity within the (multimodal) hippo-campal-amygdaloid system (sensory-limbic hyperconnectionism) and the correlative enhanced intercalation between the right and left temporoparietal lobes.

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4

O. Ngonadi, Lilian, i Francis C. Eze. "Some Optimality Variations of Central Composite Designs". Academic Journal of Applied Mathematical Sciences, nr 54 (15.04.2019): 32–42. http://dx.doi.org/10.32861/ajams.54.32.42.

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Some variations of central composite designs (CCD) under complete and partial replications of cube, axial and center points are studied using A, D and G optimality criteria. The results obtained suggest that complete replication of the cube, axial and center points are better than the partial replication of cube, axial and center points under the A and D optimality criteria studied while it varies under G optimality criterion. The partial replication of the cube, axial and center point for all the CCDs studied, the partial replicated cube point is D optimal but varies under A and G optimality criteria.

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O. Ngonadi, Lilian, i Francis C. Eze. "Some Optimality Variations of Central Composite Designs". Academic Journal of Applied Mathematical Sciences, nr 54 (15.04.2019): 32–42. http://dx.doi.org/10.32861/ajams.54.32.42.

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Some variations of central composite designs (CCD) under complete and partial replications of cube, axial and center points are studied using A, D and G optimality criteria. The results obtained suggest that complete replication of the cube, axial and center points are better than the partial replication of cube, axial and center points under the A and D optimality criteria studied while it varies under G optimality criterion. The partial replication of the cube, axial and center point for all the CCDs studied, the partial replicated cube point is D optimal but varies under A and G optimality criteria.

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6

Balpande, Ajinkya. "An Experimental Study on Partial Replacement of GGBS with Cement and Utilizing Demolished Coarse Aggregate in Concrete". International Journal for Research in Applied Science and Engineering Technology 11, nr 6 (30.06.2023): 41–47. http://dx.doi.org/10.22214/ijraset.2023.53608.

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bstract: The majority of municipal solid wastes are made up of debris from construction and demolition projects, including recycled construction aggregate (RCA). This paper presents the findings of an experimental and analytical examination of the creation of environmentally friendly concrete. It is a good idea to replace natural material with aggregate from old, demolished structures to reduce debris and preserve the environment. To reduce consumption, recycled aggregate can be utilized in place of natural aggregate. To address these issues, an attempt is undertaken in the current experimental work to substitute GGBS in varied proportions for cement. The purpose of this research is to demonstrate the findings of an investigation into the applicability of GGBS in the manufacturing of concrete by using construction and demolition debris as a recycled resource. Ground granulated blast furnace slag (GGBS) and recycled concrete aggregates are the recycled materials employed in this study. A concrete mix of grade M25 was created through the mix design process. GGBS was partially replaced with wastedestroyed aggregate in the amounts of 0, 10, 20, 30, and 40% to create the mixes. Cubes of 150x150x150mm3 were poured. The compressive strength of the concrete cube specimens was measured by smashing the cube after 7, 14, 28, 60, and 90 days of curing for various curing intervals. The compression test results on the cubes show that strength increases with the amount of slag added up to the maximum value. Compressive strength was seen to grow when GGBS content increased up to 30%, but after the replacement level was above 30%, strength began to deteriorate. The outcomes of GGBS with conventional concrete and concrete made entirely of demolished aggregate without GGBS are compared to the outcomes of GGBS with concrete containing demolished aggregate

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7

.K.M, Ms Jayakumari. "Experimental Study on Compressive Strength of the Cement Mortar Cubes with Partial Replacement of Fine Aggregate Using Polyvinyl Chloride (PVC) Plastic". INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, nr 04 (27.04.2024): 1–5. http://dx.doi.org/10.55041/ijsrem31851.

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Mortar is a material that consists of cement and sand with a range of applications in the construction industry. However, the plain mortar materials are usually brittle and often crack and fail more suddenly than reinforced mortar. This experimental study is about the compressive strength of cement mortar stabilised with the use of the polyvinyl chloride (PVC) plastic powder. Generally the compressive strength of cement mortar of mix proportion (1:3) is 33 N/mm² to 53 N/mm² has been obtained after 28 days curing. The cement mortar ratio is 1: 3 respectively. The PVC powder is added along with the sand with percentages of 0%, 2.5%, 5%, 7.5%, 10% respectively. And the water cement ratio is 0.5 with volume. The moulds of 70×70×70 mm size were used for the cube test, and the cubes were tested on the Compressive testing machine to determine the strength of cube for 3, 7, 28 days of time period respectively. The main aim of f this study to determine the compressive strength of cement mortar (1:3) of sand added with PVC powder, Key Words:- Waste Plastic, Polyvinyl Chloride, Compressive Strength, Mortar.

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8

Nwankwo, P. O., U. N. Wilson i Z. Danbuba. "THE FIRE RESISTANCE OF CONCRETE MADE WITH RECYCLED PLASTIC AS PARTIAL REPLACEMENT FOR COARSE AGGREGATE". Malaysian Journal of Civil Engineering 34, nr 2 (27.07.2022): 11–18. http://dx.doi.org/10.11113/mjce.v34.18309.

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This research is aimed to investigate the fire resistance of recycled discarded plastic when used as partial replacement for normal granite coarse aggregate in concrete when exposed to elevated temperatures. Discarded Polyethylene Terephthalate (PET) bottles were cut into a maximum size of 20mm to produce Recycled Plastic Aggregate (RPA). The replacement of normal aggregates with RPA were in proportion of 0%, 5%, 10%, 15%, 20%, 25% and 30% by weight of normal coarse aggregate. The compressive performance of the concrete made with RPA were studied by casting three 100 mm cubes for each of the percentage replacements and tested at 7, 14 and 28 days of curing age. A set of three (3) concrete cubes for each percentage replacement was cured for 28 days and subjected to a temperature of 718oC for a duration of 15 minutes in a furnace. Results of slump tests on fresh concrete showed that workability decreased with increase in RPA. Densities and compressive strengths for normal cube samples not subjected to elevated temperatures and the sample subjected to temperature of 718oC increased with increase in curing age and decreased with increase in percentage of RPA. The result showed that the concrete specimen with 10% replacement of RPA was optimum for good thermal stability.

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9

Lindner, Peter, Sachin Basil John, Christoph Koch i Dan Suciu. "The Moments Method for Approximate Data Cube Queries". Proceedings of the ACM on Management of Data 2, nr 2 (10.05.2024): 1–23. http://dx.doi.org/10.1145/3651147.

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We investigate an approximation algorithm for various aggregate queries on partially materialized data cubes. Data cubes are interpreted as probability distributions, and cuboids from a partial materialization populate the terms of a series expansion of the target query distribution. Unknown terms in the expansion are just assumed to be 0 in order to recover an approximate query result. We identify this method as a variant of related approaches from other fields of science, that is, the Bahadur representation and, more generally, (biased) Fourier expansions of Boolean functions. Existing literature indicates a rich but intricate theoretical landscape. Focusing on the data cube application, we start by investigating worst-case error bounds. We build upon prior work to obtain provably optimal materialization strategies with respect to query workloads. In addition, we propose a new heuristic method governing materialization decisions. Finally, we show that well-approximated queries are guaranteed to have well-approximated roll-ups.

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10

Lee, Kyoung Jin, i Richard L. Gibson. "An improved mesh generation scheme for the wavefront construction method". GEOPHYSICS 72, nr 1 (styczeń 2007): T1—T8. http://dx.doi.org/10.1190/1.2399366.

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Wavefront construction is an effective tool for the rapid calculation of ray fields in anisotropic media. The method explicitly tracks the propagation of a wavefront through a model, mapping it to a computational mesh that is interpolated when accuracy criteria based on paraxial ray methods are violated. Takeoff angles are used often to define the initial ray directions, but uniform sampling in the two angles leads to oversampling of the ray field in the direction of the axis. Such sampling can lead also to numerical instability associated with vanishing derivatives with respect to the azimuthal angle. We suggest a new wavefront mesh definition using the cubed-sphere mesh, which is a coordinate system used to solve partial differential equations in spherical geometries. When using this mesh, ray directions are assigned by mapping points on a regular discretization of the faces of a cube surrounding the source to corresponding rays. This scheme produces a nearly uniform distribution of rays with minimal effort and using the cubed-sphere coordinates as ray parameters to calculate partial derivatives completely eliminates the singularities that arise when takeoff angles are used as ray parameters. Numerical results for quantities related to seismic amplitudes confirm that this new mesh does provide more stable and reliable results.

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11

Huda Suliman, Nurul, Amir Atif Abdul Razak, Hazrina Mansor, Anizahyati Alisibramulisi i Norliyati Mohd Amin. "Concrete using sawdust as partial replacement of sand : Is it strong and does not endanger health?" MATEC Web of Conferences 258 (2019): 01015. http://dx.doi.org/10.1051/matecconf/201925801015.

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This study was conducted to investigate the effectiveness of concrete using sawdust to partially replace the river sand which could reduce both environmental problems and construction cost. In this study, sawdust concrete has been produced where the river sand is replaced with sawdust by 5%, 10% and 15% of the total sand volume. Both wet concrete and hardened concrete (cubes specimens) were tested through material testing and cube testing to obtain the most optimum sawdust concrete design. In addition, specimens have also been tested in environmental laboratory to identify the extent of hazardous use of sawdust to consumer health. This is because the dust used is the waste taken from the unknown root of the level of cleanliness. The result shows that the most optimum design for producing sawdust concrete is that with 10% replacement of river sand. The result is based on the compressive strength obtained. The results of environmental study also show that this sawdust concrete is free from any harmful to health contaminants.

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12

Bre?ar, Bo?tjan, Wilfried Imrich, Sandi Klav?ar, Henry Martyn Mulder i Riste ?krekovski. "Tiled partial cubes". Journal of Graph Theory 40, nr 2 (18.04.2002): 91–103. http://dx.doi.org/10.1002/jgt.10031.

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13

Gunarani, G. I., B. Karthikeyan, A. Priyadharshini, Senthil Kumaran Selvaraj, S. Jose, D. Vincent Herald Wilson i Tezeta Moges Adane. "Sustainable Concrete Columns with GGBS and Industrial Sand: A Comparative Study on Destructive and Nondestructive Tests on Damaged Columns Strengthened with GFRP Jacketing". Advances in Civil Engineering 2022 (10.09.2022): 1–11. http://dx.doi.org/10.1155/2022/6716511.

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This paper presents the experimental investigation of the load-resisting characteristics of damaged columns repaired with glass reinforced polymer (GFRP) jacketing. The high-strength columns were made with ground granulated blast furnace slag (GGBS) used at 15%, 25%, and 35% as a partial substitute for cement. Cube specimens of size 100 mm × 100 mm × 100 mm and columns of size 600 mm × 120 mm were cast to perform the study. Considering the practical difficulties in the construction field in obtaining river sand, industrial sand was used for making the specimens eco-friendly. On completion of the prescribed curing period of 28 days, the cube specimens were subjected to a compression test to ensure the grade of the mix design, and the column specimens were subjected to axial loading and were tested in two categories, with and without wrapping of GFRP sheets’ split tensile strength. Compression tests on cubes and columns were done. The nondestructive test was also performed with the ultrasonic pulse velocity (UPV) method to check the dense nature of the concrete before and after wrapping with GFRP. On comparing the results, it was observed that it is possible to obtain a higher strength using industrial sand when supported with suitable admixtures and strengthening processes.

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14

Jafri, N., M. I. F. Rosli, K. D. A. Ghani, A. Abdul Aziz, N. Zakaria i S. Sharih Md Zahir. "Determination on The Optimum Percentage of Rubberized Engineered Cementitious Composite (RECC) as Fine Aggregate Replacement in Mortar". IOP Conference Series: Earth and Environmental Science 1135, nr 1 (1.01.2023): 012046. http://dx.doi.org/10.1088/1755-1315/1135/1/012046.

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Abstract This study aims to determine the optimal percentage of Rubberized Engineered Cementitious Composite (RECC) as fine aggregate replacement in mortar. Various percentages of crumb rubber with 0%, 5%, 10%, 15%, and 20% are used as a partial replacement of fine aggregate. The mortar was subjected to a compressive strength test to evaluate crumb rubber strength performance with varying percentages. The mortar specimen was examined to determine the optimal percentages of Engineered Cementitious Composite (ECC) containing variable percentages of crumb rubber as a partial fine aggregate replacement for 7, 14, and 28 days. The compressive strength test was used until the ECC failed. This study has been carried out using 54 sample mortar cubes with 50 mm cube specimen sizes. As a result, of increased crumb rubber addition into ECC, the compressive strength was significantly reduced, which could be attributed to the low stiffness of crumb rubber and the expanded closing pores in the cement paste. The performance of RECC as a mortar improves in terms of energy dissipation and ductility as used in the compressive strength test. The optimal percentage of crumb rubber as replacement partial fine aggregate is 5%.

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15

Sager, Valeska F., Merete B. Munk, Mikka Stenholdt Hansen, Wender L. P. Bredie i Lilia Ahrné. "Formulation of Heat-Induced Whey Protein Gels for Extrusion-Based 3D Printing". Foods 10, nr 1 (22.12.2020): 8. http://dx.doi.org/10.3390/foods10010008.

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This study investigated the extrusion-based 3D printability of heat-induced whey protein gels as protein rich food inks. In particular, the effects of ionic strength by the addition of NaCl (0–250 mM), protein content (10%, 15%, 20%), fat content (0%, 10%), and partial substitution of whey protein isolate (WPI) with microparticulated whey protein (MWP) or micellar casein isolate (MCI) on printability were assessed. Texture analysis, specifically Young’s modulus, rheological measurements including yield stress, and creep–recovery behavior were used to characterize the gels. Modifications of the formulation in terms of ionic strength, increased protein content, and the formation of emulsion gels were insufficient to maintain a continuous extrusion process or shape stability after printing. However, the substitution of WPI with MWP created more viscoeleastic gels with improved printability and shape retention of the 3D cube structure after deposition. The partial replacement of WPI with MCI led to phase separation and 3D-printed cubes that collapsed after deposition. A narrow range of rheological material properties make WPI and MWP emulsion gels promising food inks for extrusion-based 3D printing.

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16

Singh, Janhavi, i Shilpa Pal. "Analysis of Blended Concrete Cubes under Impact loading using ANSYS". IOP Conference Series: Earth and Environmental Science 1084, nr 1 (1.10.2022): 012067. http://dx.doi.org/10.1088/1755-1315/1084/1/012067.

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Abstract Blended concretes, with the partial replacement of the cement with secondary cementitious material like fly ash, rice husk ash, GGBS (Ground Granulated Blast Slag), silica fume etc. are gaining a wide range of applications in civil engineering nowadays. The behaviour of concrete structures has been studied by many researchers under different types of loads like impact load, wind load, earthquake load etc. Impact loading analysis has applications like ship impact resistance design for marine structures, impact-resistant structural design against military and terrorist attacks etc. This study aims to perform a FEM analysis of blended concrete cubes under impact load. Deformation and stress response has been obtained from the velocity impact simulations in ANSYS Explicit dynamics module. Parametric analysis has been done by changing the height of the impactor, shape of the impactor, boundary conditions and partial replacement of cement in the blended concrete with different supplementary cementitious material. It is observed that the strength of the blended concrete cube decreases with an increase in height of the impact.

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17

Singh, Om Prakash, Mahendra Kr Singar i Sandeep Kumar. "Mathematical Expressions Model to forecast for Chloride Ion Penetration and Comp. Strength of Recycled Coarse Aggregate Concrete Incorporating Meta-kaolin". IOP Conference Series: Materials Science and Engineering 1224, nr 1 (1.01.2022): 012019. http://dx.doi.org/10.1088/1757-899x/1224/1/012019.

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Abstract This research investigates the mathematical modeling of compressive strength (CS) of concrete cured cube at 3, 7 & 28 days and chloride penetration resistance of cylindrical concrete specimens cured at 28 days incorporating of Meta-kaolin (MK). The experimental data results were shown various concrete specimens close to recognize compressive strength (CS) and penetration of chloride ion. Ordinary Portland cement (OPC) has been partial replacement of 0%, 5%, 8%, 12%, 16%, 18% and 20% by Meta-kaolin (MK). Compressive strength (CS) results discover through the cubes and rapid chloride penetration test (RCPT) presented. Two predictive regression models established, first for compressive strength (CS) of concrete specimen at the days of 3, 7, and 28 and second for charge passed Q at 28 days. To predictive the mathematical models have been established and have good precision, correlation by experimental results of data.

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18

Almaamari, Janat, Rahma Al Fahdi, Fatma alzahraa Al Jabri i Sachin Kuckian. "Investigation on Mechanical Properties of Concrete by replacing palm Ash and fine seashell powder as Partial Cement replacement". IOP Conference Series: Materials Science and Engineering 1282, nr 1 (1.10.2023): 012010. http://dx.doi.org/10.1088/1757-899x/1282/1/012010.

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Abstract Manufacturing cement causes harm to the environment due to Co2 emissions. CO2 emission by the industry could be reduced by recycling natural waste materials such as palm ash and seashell powder; since seashell has 95% of calcium carbonate and palm ash can improve the mechanical properties. 15 cube, 3 beams were subjected to several tests to find the mechanical characteristics in a certain period. The tests were compression strength test, flexural test, workability, SEM tests, and sieving analysis. Thebeam dimensions measurements are 150mm*150mm*650mm, and 150mm*150mm*150mm for cubes. OPC was the main finding of compression strength which gained the highest strength, but in 28 days 25% of cement replacement gained 31.7Mpa when compared with other specimens. On the other hand, OPC and 5% of partial cement replacement were classified as high workability. In addition, flexural strength test showed that 15% of cement replacement achieved the highest strength compared with other specimens. SEM test showed the surface texture of PA and SP affect the hydration, therefore it will affect the strength of concrete.

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19

Pan, Yun-jing, Ming-fang Xie i Fu-ji Zhang. "Partial Cubes and Archimedean Tilings". Acta Mathematicae Applicatae Sinica, English Series 34, nr 4 (październik 2018): 782–91. http://dx.doi.org/10.1007/s10255-018-0788-0.

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Klavzar, Sandi, i Henry Martyn Mulder. "Partial Cubes and Crossing Graphs". SIAM Journal on Discrete Mathematics 15, nr 2 (styczeń 2002): 235–51. http://dx.doi.org/10.1137/s0895480101383202.

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Gorše Pihler, Melita, i Janez Žerovnik. "Partial cubes are distance graphs". Discrete Mathematics 308, nr 5-6 (marzec 2008): 820–26. http://dx.doi.org/10.1016/j.disc.2007.07.047.

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Klavžar, Sandi, i Sergey Shpectorov. "Convex excess in partial cubes". Journal of Graph Theory 69, nr 4 (3.03.2011): 356–69. http://dx.doi.org/10.1002/jgt.20589.

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Vimalanathan, M. "Partial Replacement of Cement by Baryte". International Journal for Research in Applied Science and Engineering Technology 10, nr 6 (30.06.2022): 4527–30. http://dx.doi.org/10.22214/ijraset.2022.44817.

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Abstract: The use of high volume baryte concrete fits in very well with sustainable development. High performance concrete is being widely used all over the world. High volume baryte concrete mixtures contain lower quantities of cement and higher volume of baryte (up to 40%). The use of baryte concrete at proportions ranging from 0 to 40% of total cementations binder has been studied extensively over the last twenty years and the properties of blended concrete are well documented. The replacement of baryte as a cement component in concrete depends upon the design strength, water demand and relative cost of ash compared to cement. The specific gravity and chemical properties of baryte cement, coarse and fine aggregate were determined. Cubes and the cylinder cubes werecured for 7 and 28 days respectively. The cubes and cylinder cubes were subjected to compressive strength tests after densitydetermination at 7 and 28 days respectively. The slump of different baryte percentage are compared

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Upton, Graham. "Blocks of Voters and the Cube ‘Law’". British Journal of Political Science 15, nr 3 (lipiec 1985): 388–98. http://dx.doi.org/10.1017/s0007123400004257.

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The so-called cube ‘law’ has become ‘part of the political folklore of Great Britain’. Indeed it seems also to have passed into the general folklore of political science, having been applied to electoral systems having single-member constituencies contested by two major parties in the United States, New Zealand, Canada, Australia and South Africa.

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Sturtevant, Nathan, Ariel Felner i Malte Helmert. "Exploiting the Rubik's Cube 12-Edge PDB by Combining Partial Pattern Databases and Bloom Filters". Proceedings of the International Symposium on Combinatorial Search 5, nr 1 (1.09.2021): 175–83. http://dx.doi.org/10.1609/socs.v5i1.18332.

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Pattern Databases (PDBs) are a common form of abstraction-based heuristic whichare often compressed so that a large PDB can fit inmemory. Partial Pattern Databases (PPDBs) achieve this by storing only layersof the PDB which are close to the goal. This paper studies the problem of howto best compress and use the 457 GB 12-edge Rubik's cube PDB, suggesting anumber of ways that Bloom filters can be used to effectively compress PPDBs. Wethen develop a theoretical model of the common min compression approach and ourBloom filters, showing that the original method of compressed PPDBs can neverbe better than min compression. We conclude with experimental results showingthat Bloom filter compression of PPDBs provides superior performance to mincompression in Rubik's cube.

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Eppstein, David. "Recognizing Partial Cubes in Quadratic Time". Journal of Graph Algorithms and Applications 15, nr 2 (2011): 269–93. http://dx.doi.org/10.7155/jgaa.00226.

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Klavžar, Sandi, i Matjaž Kovše. "On Tetha-graphs of partial cubes". Discussiones Mathematicae Graph Theory 27, nr 2 (2007): 313. http://dx.doi.org/10.7151/dmgt.1363.

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Brešar, Boštjan, i Sandi Klavžar. "Θ-graceful labelings of partial cubes". Discrete Mathematics 306, nr 13 (lipiec 2006): 1264–71. http://dx.doi.org/10.1016/j.disc.2006.02.013.

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Polat, Norbert. "Netlike partial cubes I. General properties". Discrete Mathematics 307, nr 22 (październik 2007): 2704–22. http://dx.doi.org/10.1016/j.disc.2007.01.018.

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Ovchinnikov, Sergei. "Partial cubes: structures, characterizations, and constructions". Discrete Mathematics 308, nr 23 (grudzień 2008): 5597–621. http://dx.doi.org/10.1016/j.disc.2007.10.025.

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Peterin, Iztok. "A characterization of planar partial cubes". Discrete Mathematics 308, nr 24 (grudzień 2008): 6596–600. http://dx.doi.org/10.1016/j.disc.2007.11.066.

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Klavžar, Sandi, i Matjaž Kovše. "Partial cubes and their τ-graphs". European Journal of Combinatorics 28, nr 4 (maj 2007): 1037–42. http://dx.doi.org/10.1016/j.ejc.2006.04.006.

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Kobayashi, Masakazu, Yoshimasa Takayama, Hajime Kato i Hiroyuki Toda. "In-Situ SEM/EBSP Analysis during Annealing in a Pure Aluminum Foil for Capacitor". Materials Science Forum 539-543 (marzec 2007): 362–67. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.362.

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In-situ SEM/EBSP analysis has been performed during the evolution of the cube texture in a pure aluminum foil. In general, foils for capacitor are manufactured in an industrial process of casting, homogenizing, hot rolling, cold rolling (CR), partial annealing (PA), additional rolling (AR) and final annealing (FA). The foil samples after CR or AR in the process were analyzed by the SEM/EBSP technique at a constant temperature which was step-heated repeatedly by 10-20K from a room temperature to 623K or 598K. In a CRed sample, cube ({001}<100>) grains begin to grow preferentially at 503K to cover the sample. On the other hand, in a sample subjected to PA at 503K and AR, cube grains coarsened rapidly and preferentially at more than 533K in contrast to other oriented small grains remaining their sizes. Further, intragranular misorientation analysis revealed that the misorientation, which corresponds to dislocation density or strain, was much smaller in cube grains than in S ({123}<634>) and Cu ({112}<111>) ones.

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Taagepera, Rein. "Reformulating the Cube Law for Proportional Representation Elections". American Political Science Review 80, nr 2 (czerwiec 1986): 489–504. http://dx.doi.org/10.2307/1958270.

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The cube law was proposed around 1910 to express the conversion of a party's vote shares into its seat share in two-party plurality elections with single-seat districts. This article develops predictive seat-vote equations for a much wider range of elections, including those involving many parties, single- and multi-seat districts, and diverse seat allocation rules such as plurality and list proportional representation (PR). Without any statistical curve fitting based on the seat and vote shares themselves, the basic features of the conversion are predicted using exogenous parameters: magnitude and number of districts, number of parties, and total size of the electorate and of the assembly. The link between the proposed equations and the original cube law is explicated. Using an existing data base, the fit of the predictive model is examined. On balance, this model accounts well for the conversion of votes to seats, and for the deviation from proportionality in PR systems.

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Nguyen, Thi-Thuy-Hang, Hong-Ha Mai, Duc-Hung Phan i Duy-Liem Nguyen. "Responses of Concrete Using Steel Slag as Coarse Aggregate Replacement under Splitting and Flexure". Sustainability 12, nr 12 (16.06.2020): 4913. http://dx.doi.org/10.3390/su12124913.

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Experimental tests were performed to investigate the responses of coarse steel slag concrete under splitting and flexure. The name of coarse steel slag concrete (CSC) here refers to concrete using industrial byproduct steel slag as natural coarse aggregate replacement. Three CSC types were examined in this investigation as follows: CSC1, CSC2, and CSC3, having a water/cement ratio of 0.57, 0.50, and 0.45, respectively. In the compositions of the three studied CSCs, the water content by weight remained constant and other partial materials were changed, but the ratio of coarse steel slag/fine river sand was still fixed. Under splitting, three types of test methods were conducted including a cylinder splitting test, side-cube splitting test, and diagonal-cube splitting with the same sizes: the diameter of the cylinder and side of the cube were 100 mm. The orders of splitting test methods were observed for CSC2 as follows: cylinder > side-cube > diagonal-cube in terms of maximum applied load, and, cylinder > diagonal-cube > side-cube in terms of splitting strength. Additionally, there were clear size effects on the splitting strengths of CSC2 with different sizes as follows: 70 mm, 100 mm, 150 mm for cylindrical diameter, and/or cubic side. Under flexure, there was a strong co-relationship between compressive strength and flexural resistance of CSCs. The flexural engineering parameters were examined then assessed for plain CSCs, using a rectangular prism with the size of 100 × 100 × 300 mm (width × height × span-length), and, for steel-reinforced beams using CSCs with the size of 200 × 300 × 3000 mm (width × height × span-length).

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Ruslan, Amir Khomeiny, Noorsuhada Md Nor, Muhammad Akram Ramle, Amril Hadri Jamaludin, Soffian Noor Mat Saliah, Mohd Azrizal Fauzi, Ahmad Syauqi Md Hassan, Muhammad Afiq Tambichik i Nor Azlina Kasim. "Mechanical Behaviour Slenderness Ratio of 13 Solid Wall Panels Under Uniformly Distributed Load". Jurnal Kejuruteraan 36, nr 1 (30.01.2024): 09–19. http://dx.doi.org/10.17576/jkukm-2024-36(1)-02.

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Recently, there has been a lot of research in the concrete industry on a sustainable approach using concrete waste as a substitute for natural aggregates. The reason for this is that the quantities of construction and demolition waste generated today pose a significant threat to the environment but can be used as a useful concrete material in the construction industry. The aim of this study is therefore to investigate the mechanical behaviour of solid concrete wall panels containing recycled concrete aggregates as a partial substitute for natural fine aggregates. Mortar cubes and wall panels with dimensions of 50 mm x 50 mm x 50 mm and 1000 mm x 300 mm x 75 mm, respectively, were produced. The wall panels were made from a 1:4 concrete mix consisting of 50% recycled concrete and 5% perlite (to reduce the weight of the concrete, and improve its workability), and 1% superplastizer, while the control wall was made with 100% natural fines. The wall panels were subjected to a compression test under uniformly distributed load. The cube samples were tested at 28 days of age. Mortar cubes with RCA achieved the highest compressive strength of 16.27 MPa compared to the control sample. The control wall panel has a higher ultimate load of 147.51 kN compared to the sample that contains RCA and perlite, which has an ultimate load of 128.68 kN. By 2030, our country needs to achieve sustainable management and efficient use of natural resources. By recycling this solid waste through separating, cleaning and crushing the concrete waste into small particles so that it can be used as a building material to replace sand. This shows that recycled concrete aggregate can be a potential material for making wall panels.

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Polat, Norbert. "On some characterizations of antipodal partial cubes". Discussiones Mathematicae Graph Theory 39, nr 2 (2019): 439. http://dx.doi.org/10.7151/dmgt.2083.

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Polat, Norbert. "On some properties of antipodal partial cubes". Discussiones Mathematicae Graph Theory 40, nr 3 (2020): 755. http://dx.doi.org/10.7151/dmgt.2146.

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Xie, Yan-Ting, Yong-De Feng i Shou-Jun Xu. "Characterization of 2-arc-transitive partial cubes". Discrete Mathematics 346, nr 1 (styczeń 2023): 113190. http://dx.doi.org/10.1016/j.disc.2022.113190.

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Cohen, Nathann, i Matjaž Kovše. "Not all partial cubes are Θ-graceful". Discrete Mathematics 343, nr 10 (październik 2020): 112031. http://dx.doi.org/10.1016/j.disc.2020.112031.

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Albenque, Marie, i Kolja Knauer. "Convexity in partial cubes: The hull number". Discrete Mathematics 339, nr 2 (luty 2016): 866–76. http://dx.doi.org/10.1016/j.disc.2015.10.032.

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Kuhl, Jaromy, i Tristan Denley. "Some partial Latin cubes and their completions". European Journal of Combinatorics 32, nr 8 (listopad 2011): 1345–52. http://dx.doi.org/10.1016/j.ejc.2011.05.003.

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Marc, Tilen. "Classification of Vertex-Transitive Cubic Partial Cubes". Journal of Graph Theory 86, nr 4 (26.02.2017): 406–21. http://dx.doi.org/10.1002/jgt.22134.

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Othman, Muhammad Lutfi, Noor Nabilah Binti Sarbini, Redzuan Abdullah i Mohamad Salleh Bin Yassin. "Effects of the partial replacements of Oil Palm Boiler Clinker (OPBC) on the density and compressive strength of concrete". IJEBD (International Journal of Entrepreneurship and Business Development) 5, nr 5 (30.09.2022): 992–1002. http://dx.doi.org/10.29138/ijebd.v5i5.2005.

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Purpose: Oil Palm Boiler Clinker (OPBC) is a promising waste material that can be deployed toward sustainable development. Researchers have been looking into the potential of industrial waste and by-products to provide an alternative to natural stone aggregates in concrete production. This study aims to determine an OPBC concrete mix eligible for lightweight reinforced precast concrete products according to BS EN 13369:2013. Design/methodology/approach: The concrete mix design is determined via the trial mix method, where percentages of OPBC are varied as partial replacements in the control mix. Raw OPBC is collected from a local palm oil mill in Johor, Malaysia and is processed to be implemented in the concrete mix. Three 100mm cube samples of nine OPBC mixes and one control mix are tested and weighed on day 1, day 7, and day 28 to determine their cube compressive strength and density to BS EN 12390-3:2009. The mix that fulfils the requirements is the mix with 90% coarse clinker and 90% fine clinker, cured by the method of air curing, which achieved a cube compressive strength of 38.66N/mm2 and density of 1920kg/m3. Findings: In conclusion, the results show that OPBC concrete is a green alternative to standard concrete that does not differ significantly in terms of strength while offering a density reduction of as much as 16%. Originality/value: This paper is original Paper type: Research paper

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Mohammed Elhaj Alsoufi Mohammed Ahmed. "Engineering Performance of Cement Mortar Cubes Containing Percentage of Date Palm Fibers and Leaf Ash". Advanced Research in Applied Sciences and Engineering Technology 30, nr 1 (8.03.2023): 203–27. http://dx.doi.org/10.37934/araset.30.1.203227.

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The problem of conventional cement mortar cubes is the requirement of cement to be used for their production. It is recognized that cement production involves a significant release of carbon dioxide to the atmosphere, which is detrimental to the quality of the environment. To adopt a sustainable development of building materials, date palm tree has been used by numerous researchers to partially replace the cement in the production of mortar cubes. The study aims: 1. To optimize the engineering properties of cement mortar cubes enhanced with date palm fibers and leaves ash. 2. To investigate the microstructures and chemical characteristics of the optimized cement mortar enhanced with waste date palm fibers and leaves ash. The design optimization in this study, mortar cubes were formulated in such a way that the trial mix designs were varied with date palm leaves ash (1% to 10% date palm leaves ash as partial substitute of cement) and date palm, fibers (1% to 5% as partial substitute of silica sand). The mechanism of reaction at early- and long characterization tests studied term period of curing on paste, including water absorption test, Ultrasonic Pulse Velocity (UPV) test, compression test, SEM test, energy dispersive X-ray (EDX) test, X-ray and Fluorescence tests (XRF). As the study's major finding, it was realized that the optimal mix ratio of the treated mortar cubes was noticed to have 4% date palm leaves ash as partial cement substitute and 2% date palm fibers as partial silica sand substitute. There was significant improvement in the treated mortar cubes' engineering properties compared to those of the control mortar cubes. The study outcomes proved that both date palm leaves ash and fibers can cause pozzolanic activity and reinforcing effect on the treated mortar cubes.

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Zeleke, Tadele Yigrem, Kassahun Admassu Abegaz, Begashaw Worku Yifru i Dagmawi Tesfaw Yitayew. "Experimental Investigation on the Utilization of Marble and Scoria Powder as Partial Replacement of Cement in Concrete Production". Advances in Civil Engineering 2023 (17.11.2023): 1–13. http://dx.doi.org/10.1155/2023/2279535.

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This paper explores how marble and scoria powder can be used as partial substitutes for ordinary Portland cement in creating C-25 concrete. Both materials contain over 50% of the major oxides found in cement, with marble high in CaO and scoria high in SiO2. Experimental investigations were conducted to study the chemical, physical, mechanical, and fresh properties of concrete containing marble and scoria powder. For the investigation, 13 different mixes, including the control mix, were used with a constant water–cement ratio of 0.5 and a slump range of 25–50 mm for concrete with a compressive strength (CS) of 25 MPa. Marble-to-scoria ratio of 2 : 1, 1 : 1, and 1 : 2 was used, and then the combined fraction of both marble waste and scoria in concrete was increased from 0% to 20% in 5% range. Including the control test specimens, a total of 117 (150 × 150 × 150 mm) concrete cubes for CS test, 39 (100 × 100 × 500 mm) concrete beam specimens for flexural strength test, 39 (100 × 200 mm) cylinder specimens for splitting tensile strength (STS) test and, 39 (100 × 100 × 100 mm) cube specimens for water absorption test were cast and tested at 3, 7, 28, and 56 days. The test results indicate that marble and volcanic scoria powders with marble-to-scoria ratio of 1 : 1 could replace cement up to 15% without compromising the CS and up to 10% without compromising the flexural and STS; also, the water absorption decreases up to 10% replacement; however, the workability of the fresh mix decreases as the combined replacement level of marble and scoria increases. Generally, a 10% replacement with marble-to-scoria ratio of 1 : 1 produces concrete with higher compressive, flexural, tensile strength, and water absorption manifestations when compared to conventional concrete.

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Shakeel, Namra, i Tahir Mehmood. "Inverse Matrix Problem in Regression for High-Dimensional Data Sets". Mathematical Problems in Engineering 2023 (23.02.2023): 1–8. http://dx.doi.org/10.1155/2023/2308541.

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Forhigh-dimensional chemometric data, the inverse matrix X t X − 1 problem in regression models is a difficulty. Multicollinearity and identification result from the inverse matrix problem. The usage of the least absolute shrinkage and selection operator (LASSO) and partial least squares are two existing ways of dealing with the inverse matrix problem (PLS). For regressing the chemometric data sets, we used extended inverse and beta cube regression. The existing and proposed methods are compared over near-infrared spectra of biscuit dough and Raman spectra analysis of contents of polyunsaturated fatty acids (PUFA). For reliable estimation, Monte Carlo cross-validation has been used. The proposed methods outperform based on the root mean square error, indicating that cube regression and inverse regression are reliable and can be used for diverse high-dimensional data sets.

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Brešar, Boštjan, Wilfried Imrich i Sandi Klavžar. "Fast recognition algorithms for classes of partial cubes". Discrete Applied Mathematics 131, nr 1 (wrzesień 2003): 51–61. http://dx.doi.org/10.1016/s0166-218x(02)00416-x.

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Polat, Norbert. "Netlike partial cubes II. Retracts and netlike subgraphs". Discrete Mathematics 309, nr 8 (kwiecień 2009): 1986–98. http://dx.doi.org/10.1016/j.disc.2008.04.008.

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Polat, Norbert. "Netlike partial cubes III. The median cycle property". Discrete Mathematics 309, nr 8 (kwiecień 2009): 2119–33. http://dx.doi.org/10.1016/j.disc.2008.04.033.

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