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Artículos de revistas sobre el tema "Zig-zag model"

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Autor: Grafiati

Publicado: 14 de marzo de 2023

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1

Aloui, Lobna, Thierry Dintzer y Izabela Janowska. "Fe Atom—Mixed Edges Fractal Graphene via DFT Calculation". ChemEngineering 6, n.º 5 (8 de octubre de 2022): 79. http://dx.doi.org/10.3390/chemengineering6050079.

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The stability of small fractal graphene models with two different symmetries and Fe atoms at their mixed edges is addressed by density functional theory (DFT) calculations. Four kinds of edge configurations and Fe atom localizations are determined depending on the model. The edges have mixed configuration, the zig-zag and “intra-zig-zag” in symmetrical structures and armchair and zig-zag type in the architectures with rotational symmetry. The rotational symmetry graphene exhibits slightly higher stability per carbon atom compared to the symmetrical model, while the localization of Fe atoms is more favorable at armchair and “inversed zigzag” than at zigzag type carbon termination. Larger graphene structures with rotational symmetry were observed previously via experimental cutting of graphene with Fe nanoparticles (NPs).

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2

Yuniati, Yuniati. "Perancangan Sistem Autopilot untuk Kontrol Kemudi Model Kapal Mengunakan Programable Automatic Controller Ni Compactrio". Wave: Jurnal Ilmiah Teknologi Maritim 9, n.º 2 (11 de enero de 2018): 65–70. http://dx.doi.org/10.29122/jurnalwave.v9i2.2659.

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Perancangan sistem autopilot pada sebuah alat/sistem kemudi mempunyai peranan sangat penting, yang nantinya akan mempengaruhi hasil akhir dan kinerja sistem kemudi yang akan dijalankan. Paper ini membahas tentang perancangan sebuah sistem kontrol/pengendali otomatis yang dapat diprogram dengan menggunakan CompactRIO NI cRIO sebagai perangkat yang menjalankan sistem Autopilot. Perancangan sistem autopilot ini divalidasi melalui simulasi uji zig-zag model kapal dan dari hasil validasi ini didapatkan bahwa sistem kontrol ini berfungsi dan mampu melakukan lintasan zig-zag sesuai yang diharapkan.

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3

Coddé, Joris, Wim Van der Veken y Martine Baelmans. "The Effect of Mass Flow Distribution Inaccuracies in a Hydraulic Network Model for OD Zig-Zag Cooled Power Transformer Windings". Applied Mechanics and Materials 789-790 (septiembre de 2015): 336–41. http://dx.doi.org/10.4028/www.scientific.net/amm.789-790.336.

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In this paper the mass flow distribution in zig-zag cooled power transformer windings is shown to play a crucial factor to accurately predict the winding temperature. In order to enable thermo-hydraulic network models for transformer design, new correlations are derived for combining and dividing T-junctions and elbow configurations. Good correspondence is achieved in comparison with CFD simulation results for a zig-zag cooled power transformer winding.

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4

Christiansen, P. L., A. V. Savin y A. V. Zolotaryuk. "Zig-zag version of the Frenkel-Kontorova model". Physical Review B 54, n.º 18 (1 de noviembre de 1996): 12892–902. http://dx.doi.org/10.1103/physrevb.54.12892.

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5

Liu, Xiongjun, Yuqin Fan, Tao Mo, Qingxiu Chen y Weiting Chen. "Comparative Study of the Gut Microbiota Community between the Farmed and Wild Mastacembelus armatus (Zig-Zag Eel)". Metabolites 12, n.º 12 (29 de noviembre de 2022): 1193. http://dx.doi.org/10.3390/metabo12121193.

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Cultivated and wild fish of the same species may exhibit different characteristics, such as in their flavor, growth and development. In some wild fish species, reproductive functions may even be retarded when wild individuals are moved into cultivated conditions. The gut microbiota may be one of the reasons for these phenomena as they have been reported to play an important role in host growth and development, as well as in normal reproductive functioning. Here, we used Mastacembelus armatus (zig-zag eel), a freshwater fish which shows anormal reproductive function in cultivated conditions, as a model to comparatively study the diversity, structure and function of gut microbiota in cultivated and wild groups by analyzing the 16S rRNA sequence of each group’s microbiota. The results showed that Proteobacteria and Firmicutes were the dominant phyla in the gut microbiota of wild (accounting for 45.8% and 20.3% of the total number of Proteobacteria and Firmicutes, respectively) and farmed (accounting for 21.4% and 75.6% of the total number of Proteobacteria and Firmicutes, respectively) zig-zag eel. Wild zig-zag eels (Shannon = 3.56; Chao = 583.08; Ace = 579.18) had significantly higher alpha diversity than those in cultivated populations (Shannon = 2.09; Chao = 85.45; Ace = 86.14). A significant difference in the community structure of the gut microbiota was found between wild and cultivated populations. The wild zig-zag eel showed a high abundance of functional pathways in metabolism, genetic information processing and organismal system function. These results suggested that the diversity and function of gut microbiota in zig-zag eel were correlated with their diet and habitat conditions, which indicated that the management of cultivated populations should mimic the wild diet and habitat to improve the productivity and quality of farmed zig-zag eel.

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6

Fei, Qili, Yu Zhang, Rui Xia y Blake C. Meyers. "Small RNAs Add Zing to the Zig-Zag-Zig Model of Plant Defenses". Molecular Plant-Microbe Interactions® 29, n.º 3 (marzo de 2016): 165–69. http://dx.doi.org/10.1094/mpmi-09-15-0212-fi.

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Plant small RNAs play important roles in transcriptional and posttranscriptional regulation, with ongoing work demonstrating their functions in diverse pathways. Their roles in defense responses are a topic of active investigation, particularly the rich set of micro (mi)RNAs that target disease resistance genes such as nucleotide binding/leucine-rich repeat (NB-LRR) genes. The miRNA–NB-LRR interactions result in the production of phased, secondary small interfering (phasi)RNAs, and phasiRNAs function in both cis and trans to propagate negative regulatory effects across additional members of the target gene family. Yet, while phasiRNAs have the capacity to trigger targeted decay of specific targets, both in cis and trans, their functional relevance in NB-LRR regulation remains largely a matter of speculation.

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7

Kapuria, S. "A Coupled Zig-Zag Third-Order Theory for Piezoelectric Hybrid Cross-Ply Plates". Journal of Applied Mechanics 71, n.º 5 (1 de septiembre de 2004): 604–14. http://dx.doi.org/10.1115/1.1767170.

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A new zig-zag coupled theory is developed for hybrid cross-ply plates with some piezoelectric layers using third-order zig-zag approximation for the inplane displacements and sublayer wise piecewise linear approximation for the electric potential. The theory considers all electric field components and can model open and closed-circuit boundary conditions. The deflection field accounts for the transverse normal strain due to the piezoelectric d33 coefficient. The displacement field is expressed in terms of five displacement variables (which are the same as in FSDT) and electric potential variables by satisfying exactly the conditions of zero shear stresses at the top and bottom, and their continuity at layer interfaces. The governing equations are derived from the principle of virtual work. Comparison of the Navier solutions for the simply-supported plates with the analytical three-dimensional piezoelasticity solutions establishes that the present efficient zig-zag theory is quite accurate for moderately thick plates.

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8

Kavcic, A. y J. M. F. Moura. "Experimental validation of the triangle zig-zag transition model". IEEE Transactions on Magnetics 33, n.º 5 (1997): 2704–6. http://dx.doi.org/10.1109/20.617451.

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9

Pavlinovic, Vladimir, Miodrag Spasic, Nikola Foretic, Dean Kontić y Nataša Zenić. "Differential Influence of General Anthropometric and Motor Predictors on Pre-planned Agility in Pubescent Boys and Girls: A Multiple Regression Study". Sport Mont 20, n.º 2 (1 de junio de 2022): 75–81. http://dx.doi.org/10.26773/smj.220612.

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In this study, we investigated the influence of balance, jumping power, and speed as well as morphological variables for three different agility tests in early pubescent boys (n=73) and girls (n=63). The predictors included body height and mass, body fat, high jumps, the overall stability index, ankle mobility, and a 10 and a 15 m sprint. The statistical analysis included calculations of correlations, regression models for the correlated variables, and the validation of the regression models. The calculated regression models for the male group explained 38% of the variance in a Zig-Zag test, 12% in a 20-yard test (20Y), and 81% in a T-test. The significant regression model for the Zig-Zag test included body mass, high jumps, and a 10 m sprint. The 20Y test had no predictors in the male group. For the T-test, the only predictor was the 10 m sprint. The calculated regression models for the female group explained 57% of the variance in the Zig-Zag test, 32% in the 20Y test, and 42% in the T-test. The significant regression model in the female group included only the 10 m sprint for all three agility criteria. The regression models were cross-validated using the second half of the sample (boys: n=36; girls: n=31). The correlation between the predicted and the achieved scores provided a statistically significant validation for all agility tests.

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10

Icardi, U. y L. Ferrero. "Layerwise zig-zag model with selective refinement across the thickness". International Journal for Numerical Methods in Engineering 84, n.º 9 (26 de octubre de 2010): 1085–114. http://dx.doi.org/10.1002/nme.2933.

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11

Shukla, Shivangi, Bijoya Kumar Behera, Rajesh Kumar Mishra, Martin Tichý, Viktor Kolář y Miroslav Müller. "Modelling of Auxetic Woven Structures for Composite Reinforcement". Textiles 2, n.º 1 (27 de diciembre de 2021): 1–15. http://dx.doi.org/10.3390/textiles2010001.

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The current research is focused on the design and development of auxetic woven structures. Finite element analysis based on computational modeling and prediction of axial strain as well as Poisson’s ratio was carried out. Further, an analytical model was used to calculate the same parameters by a foldable zig-zag geometry. In the analytical model, Poisson’s ratio is based on the crimp percentage, bending modulus, yarn spacing, and coefficient of friction. In this yarn, properties and fabric parameters were also considered. Experimental samples were evaluated for the actual performance of the defined auxetic material. Auxetic fabric was developed with foldable strips created in a zig-zag way in the vertical (warp) direction. It is based on the principle that when the fabric is stretched, the unfolding of the folds takes place, leading to an increase in transverse dimensions. Both the analytical and computational models gave close predictions to the experimental results. The fabric with foldable strips created in a zig-zag way in the vertical (warp) direction produced negative Poisson’s ratio (NPR), up to 8.7% of axial strain, and a maximum Poisson’s ratio of −0.41 produced at an axial strain of around 1%. The error percentage in the analytical model was 37.14% for the experimental results. The computational results also predict the Poisson’s ratio with an error percentage of 22.26%. Such predictions are useful for estimating the performance of auxetic woven structures in composite reinforcement. The auxetic structure exhibits remarkable stress-strain behavior in the longitudinal as well as transverse directions. This performance is useful for energy absorption in composite reinforcement.

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12

Pizzigalli, Cristian, Federico Banfi, Gentile Francesco Ficetola, Mattia Falaschi, Marco Mangiacotti, Roberto Sacchi, Marco A. L. Zuffi y Stefano Scali. "Eco-geographical determinants of the evolution of ornamentation in vipers". Biological Journal of the Linnean Society 130, n.º 2 (4 de abril de 2020): 345–58. http://dx.doi.org/10.1093/biolinnean/blaa037.

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Abstract Multiple hypotheses have been proposed to explain the variation of dorsal patterns observed in snakes, but no studies yet have tested them over broad taxonomic and geographical scales. The Viperidae offer a powerful model group to test eco-evolutionary processes that lead to disruptive and cryptic ornaments. We developed a database reporting dorsal ornamentation, ecological habitus, habitat features and climatic parameters for 257 out of 341 recognized species. Three patterns of dorsal ornamentation were considered: “zig-zag”, “blotchy” and “uniform” patterns. Phylogenetic comparative analyses were based on 11 mitochondrial and nuclear genes. Forty-eight species presented a zig-zag pattern type, 224 a blotchy pattern type and 32 a uniform pattern type. All the patterns showed a strong phylogenetic signal. Character phylogenetic reconstruction analyses suggested an ancestral state for blotchy ornamentation, with multiple independent evolutions of the other patterns. The blotchy pattern was more frequent in terrestrial species living in warm climates and sandy habitats, supporting the hypothesis of a disruptive function. The zig-zag pattern evolved independently in several isolated taxa, particularly in species living in cold climates and in dense vegetation or water-related habitats, supporting the hypothesis of disruptive and aposematic functions. Uniform coloration was particularly frequent in arboreal species, supporting the hypothesis of a cryptic function.

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13

Zhang, Dongjian, Xitao Zheng, Chongzhe Wang y Zhen Wu. "Experiments and Analysis on Stability of the Sandwich Structures with Soft Core". International Journal of Structural Stability and Dynamics 19, n.º 12 (diciembre de 2019): 1950159. http://dx.doi.org/10.1142/s0219455419501591.

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In this paper, first a complete buckling experiment of the sandwich beams with the foam core is carried out, which includes the manufacturing of specimens and their experimental verification. Second, a refined sinusoidal zig-zag theory (RSZT) is established, which can describe the zig-zag effect during the in-plane compression of sandwich beam and accommodate the transverse shear free surface boundary conditions. Based on the established model combined with Hu–Washizu variational principle, a two-node beam element has been developed to address the buckling problem of the sandwich beams. Thus, the established beam element is able to accommodate interlaminar continuous conditions of transverse shear stress. Several examples have been investigated to validate the accuracy of the established method. The comparative analysis of the results including experimental data, the results acquired from three-dimensional finite element (3D-FEM) and diverse models has been made. Comparative analysis shows that the accurate buckling loads can be acquired from the established model. Nevertheless, other models discarding the continuous conditions of transverse stresses among the adjacent layers largely overestimate the critical loads.

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14

Wang, Qi, Nadia Shakoor, Adam Boyher, Kira M. Veley, Jeffrey C. Berry, Todd C. Mockler y Rebecca S. Bart. "Escalation in the host-pathogen arms race: A host resistance response corresponds to a heightened bacterial virulence response". PLOS Pathogens 17, n.º 1 (11 de enero de 2021): e1009175. http://dx.doi.org/10.1371/journal.ppat.1009175.

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The zig-zag model of host-pathogen interaction describes the relative strength of defense response across a spectrum of pathogen-induced plant phenotypes. A stronger defense response results in increased resistance. Here, we investigate the strength of pathogen virulence during disease and place these findings in the context of the zig-zag model. Xanthomonas vasicola pv. holcicola (Xvh) causes sorghum bacterial leaf streak. Despite being widespread, this disease has not been described in detail at the molecular level. We divided diverse sorghum genotypes into three groups based on disease symptoms: water-soaked lesions, red lesions, and resistance. Bacterial growth assays confirmed that these three phenotypes represent a range of resistance and susceptibility. To simultaneously reveal defense and virulence responses across the spectrum of disease phenotypes, we performed dual RNA-seq on Xvh-infected sorghum. Consistent with the zig-zag model, the expression of plant defense-related genes was strongest in the resistance interaction. Surprisingly, bacterial virulence genes related to the type III secretion system (T3SS) and type III effectors (T3Es) were also most highly expressed in the resistance interaction. This expression pattern was observed at multiple time points within the sorghum-Xvh pathosystem. Further, a similar expression pattern was observed in Arabidopsis infected with Pseudomonas syringae for effector-triggered immunity via AvrRps4 but not AvrRpt2. Specific metabolites were able to repress the Xvh virulence response in vitro and in planta suggesting a possible signaling mechanism. Taken together, these findings reveal multiple permutations of the continually evolving host-pathogen arms race from the perspective of host defense and pathogen virulence responses.

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15

Bahoosh, Safa Golrokh, Julia M. Wesselinowa y Steffen Trimper. "Modified Heisenberg model for the zig-zag structure in multiferroic RMn2O5". Journal of Applied Physics 118, n.º 8 (28 de agosto de 2015): 084102. http://dx.doi.org/10.1063/1.4929646.

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16

Benakli, Mourad y Enzo Granato. "Phase transitions in a frustrated XY model with zig-zag couplings". Physical Review B 55, n.º 13 (1 de abril de 1997): 8361–68. http://dx.doi.org/10.1103/physrevb.55.8361.

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17

Elias, Watheq, M. Elliott y C. C. Matthai. "Electrical transport of zig-zag and folded graphene nanoribbons". MRS Proceedings 1549 (2013): 41–46. http://dx.doi.org/10.1557/opl.2013.950.

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ABSTRACTIn recent years, there has been much interest in modelling graphene nanoribbons as they have great potential for use in molecular electronics. We have employed the NEGF formalism to determine the conductivity of graphene nanoribbons in various configurations. The electronic structure calculations were performed within the framework of the Extended Huckel Approximation. Both zigzag and armchair nanoribbons have been considered. In addition, we have also computed the transmission and conductance using the non-equilibrium Greens function formalism for these structures. We also investigated the effect of defects by considering a zigzag nanoribbon with six carbon atoms removed. Finally, the effect of embedding boron nitride aromatic molecules in the nanoribbon has been considered. The results of our calculations are compared with that obtained from recent work carried out using tight-binding model Hamiltonians.

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18

Ali, Baharuddin, Nurman Firdaus y N. Nurhadi. "Analisa Hidrodinamika Kapal Container Sarat Rendah". Kapal 14, n.º 3 (17 de noviembre de 2017): 65. http://dx.doi.org/10.14710/kpl.v14i3.15594.

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Kapal container sebagai sarana angkutan barang berpengaruh vital terhadap laju percepatan perekonomian nasional. Kondisi perairan Indonesia yang kedalaman dan fasilitas pendukung pelabuhan bervariasi serta efisiensi operasional kapal menjadi pertimbangan dalam mendesain kapal. Penggunaan kapal sarat rendah tipe barge bermesin sebagai pengangkut container, Self Propelled Container Barge (SPCB) saat ini banyak menjadi pilihan operator kapal dalam melayani pengiriman barang dengan container. Penelitian ini menyajikan analisis hidrodinamika kapal SPCB 100 TEUs dengan metode pengujian model meliputi seakeeping, turning dan zig-zag manuvering serta resistance test. Dari hasil uji seakeeping diketahui bahwa respon gerak kapal pada kondisi gelombang sea-state 4 masih dalam batas toleransi dengan memperhatikan kombinasi kecepatan dan arah heading kapal. Kinerja manuvering turning dan zig-zag kapal dalam batas aman yang ditetapkan IMO. Dari hasil uji resistance didapatkan kecepatan maksimal yang optimum kapal adalah 12 knot. Selain besaran terukur, uji hidrodinamika dengan model memberikan gambaran fenomena saat kapal beroperasi di laut, sehingga menjadi informasi yang penting dalam desain dan operasional kapal.

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19

Choi, Donghyeok y Joonghan Shin. "Numerical Investigation of the Effects of the Beam Scanning Pattern and Overlap on the Temperature Distribution during the Laser Dopant Activation Anneal Process". Applied Sciences 11, n.º 22 (14 de noviembre de 2021): 10748. http://dx.doi.org/10.3390/app112210748.

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Laser thermal annealing (LTA) has played an important role in the fabrication of scaled semiconductor devices by reducing the heat budget of the dopant activation process. During the laser annealing of entire wafer areas, the beam scanning pattern and overlap ratio have significant effects on uniform heating during the process. In this study, a numerical simulation of the LTA process was carried out using a three-dimensional transient heat transfer model. The temperature distribution produced by different laser scan paths and beam overlap ratios was analyzed. Additionally, the behavior of the dopant (phosphorus) diffusion induced under the multipath and beam overlapping conditions was numerically investigated. According to the simulation result, a zig-zag pattern generated hot spots around the corner areas of the beam path due to the greater heat accumulation per unit area; however, a bidirectional pattern induced cold spots due to the absence of laser heating around the corner areas. It was also found that the maximum temperature reachable in the beam overlapped region was much lower than that obtained along the beam scanning path, and the most uniform heating could be obtained when the zig-zag pattern and a 50% overlap ratio were used. According to the dopant diffusion and concentration distribution predicted for the case of the zig-zag pattern and 50% overlap ratio, the difference in the dopant diffusion length was approximately thirty times within the scanned area.

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20

Aulia, Maimunia Rizqi y Nugraheti Sismulyasih Sb. "KEEFEKTIFAN MODEL KEPALA BERNOMOR STRUKTUR DENGAN MEDIA ZIG-ZAG TERHADAP KETERAMPILAN MENULIS PANTUN SISWA KELAS V". Primary: Jurnal Pendidikan Guru Sekolah Dasar 8, n.º 1 (6 de abril de 2019): 1. http://dx.doi.org/10.33578/jpfkip.v8i1.7035.

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This research aimed to determine the effectiveness of a structured numbered head model using zig-zag media to poem writing skills of class V Gugus Arjuna State Elementary School, Semarang City. This research belongs to quantitative research which has a type of experimental research using Quasi-Experimental Design and applied Nonequivalent Control Group form. The subjects of this research were students of class V Gugus Arjuna State Elementary School, Semarang City. The samples of this research were students of Class VA Kerobokan State Elementary School as a control class and students of class VB as an experimental class. Sampling technique was used area sampling. Data gathering technique was used documentation and test. The research data result was analyzed by using a prerequisite test and hypothesis test. The study data result was analyzed using t-test and n-gain test. The result of the hypothesis test showed that(calculate) 1.6927 > t(table) 1.66. N-gain control class 0.132 (low) and experimental class 0.320 (medium). From the analysis, it can be concluded that structured numbered head learning model using zig-zag media is effective to poem writing skill of class V Gugus Arjuna State Elementary School, Semarang City.

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21

Mirehi, Akram y Ebrahim Heidari-Semiromi. "Effects of the interplay between electron–electron interaction and intrinsic spin–orbit interaction on the indirect RKKY coupling in graphene nanoflakes". Physical Chemistry Chemical Physics 21, n.º 3 (2019): 1324–35. http://dx.doi.org/10.1039/c8cp05041d.

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The effects of electron–electron (e–e) interaction and intrinsic spin–orbit interaction (ISOI) on the maximum of the magnetization and the indirect RKKY (Ruderman–Kittel–Kasuya–Yosida) coupling between the magnetic impurities embedded in zig-zag graphene nanoflakes are investigated using the tight-binding Hamiltonian and the mean-field Hubbard model.

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22

Ali, Baharuddin, Cakra Wijaya Kusuma Rahadi, Sumarsono Sumarsono y Muhamad Ali Mudhofar. "Studi Eksperimen Pengaruh Initial Constant Heel Terhadap Kinerja Manuvering Kapal". Jurnal Teknologi dan Riset Terapan (JATRA) 1, n.º 2 (31 de diciembre de 2019): 55–60. http://dx.doi.org/10.30871/jatra.v1i2.1678.

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Manuverabilitas suatu kapal adalah salah satu kunci untuk menjamin keselamatan jalannya operasional kapal. Kondisi manuver kapal dalam kondisi kapal tidak normal misal mengalami kemiringan akibat bergeseran muatan atau akibat kapal mengalami kebocoran (constant heel) perlu dilakukan antisipasi. Mengetahui karakteristik manuvering kapal dengan kondisi initial constant heel melalui uji model akan memberikan gambaran riil yang terjadi dan menjadi masukan dalam permodelan matematis. Untuk mengetahui pengaruh kemiringan kapal terhadap kinerja manuver kapal maka pada tulisan ini menyajikan hasil pengujian turning dan zig-zag maneuver pada sebuah model kapal patroli pantai dalam kondisi normal dan initial port side constant heel dengan metode free running model. Dari hasil pengujian didapatkan bahwa penurunan dan kenaikan parameter turning maneuverdalam kondisi kapal miring terlihat lebih siknifikan pada transfer dan tactical diameter jika dibandingkan dengan kondisi normal. Saat kapal miring ke kiri (port side initial constant heel) melakukan port side turning, transfer dan tactical diameter model kapal dengan kondisi miring ke kiri mengalami penurunan 2.14% dan 3.03%, sebaliknya saat starboard side turning mengalami peningkatan pada transfer diameter 6.20% dan tactical diameter naik menjadi 8.09% dibandingkan kondisi normal, sedangkan pengaruh initial constant heel pada manuver zig-zag tidak siknifikan

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23

Arya, Hemendra. "A new zig-zag model for laminated composite beams: free vibration analysis". Journal of Sound and Vibration 264, n.º 2 (julio de 2003): 485–90. http://dx.doi.org/10.1016/s0022-460x(02)01489-x.

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24

Lee, K. H., Pascal B. Xavier y C. H. Chew. "Static response of unsymmetric sandwich beams using an improved zig-zag model". Composites Engineering 3, n.º 3 (enero de 1993): 235–48. http://dx.doi.org/10.1016/0961-9526(93)90058-r.

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25

Lee, K. H., N. R. Senthilnathan, S. P. Lim y S. T. Chow. "An improved zig-zag model for the bending of laminated composite plates". Composite Structures 15, n.º 2 (enero de 1990): 137–48. http://dx.doi.org/10.1016/0263-8223(90)90003-w.

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26

Xavier, Pascal B., K. H. Lee y C. H. Chew. "An improved zig-zag model for the bending of laminated composite shells". Composite Structures 26, n.º 3-4 (enero de 1993): 123–38. http://dx.doi.org/10.1016/0263-8223(93)90061-t.

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27

Lee, K. H., W. Z. Lin y S. T. Chow. "Bidirectional bending of laminated composite plates using an improved zig-zag model". Composite Structures 28, n.º 3 (enero de 1994): 283–94. http://dx.doi.org/10.1016/0263-8223(94)90015-9.

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28

Averill, R. C. y Y. C. Yip. "Thick beam theory and finite element model with zig-zag sublaminate approximations". AIAA Journal 34, n.º 8 (agosto de 1996): 1627–32. http://dx.doi.org/10.2514/3.13281.

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29

Icardi, Ugo y Federico Sola. "Indentation of Sandwiches Using a Refined Zig-Zag Model and a Mesoscale Damage Model". Universal Journal of Mechanical Engineering 2, n.º 1 (enero de 2014): 6–19. http://dx.doi.org/10.13189/ujme.2014.020102.

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30

Huang, Xiang y Z. X. Lin. "The Optimal Model of Tool Paths Generation for Pocket Milling". Materials Science Forum 626-627 (agosto de 2009): 201–6. http://dx.doi.org/10.4028/www.scientific.net/msf.626-627.201.

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This paper describes an integrated method to determine optimal cutting parameters for milling pocket based on minimum cutting time. The main constraints entailed in real cutting, such as chatter free, uncut free tool paths, cutter and machine tool limitations, are included into the optimal model. The optimal parameters (depth of cut, width of cut, spindle speed) are inserted into the tool paths generation directly for four kinds of conventional cutting modes (Zig and Zig-Zag parallel cutting mode, inwards and outwards spiral pattern modes). According to the fact that the first cut in every cut level is slotting milling, the milling areas are divided into slotting milling area and general milling area. This dynamically corrected tool paths generation method changes the order of conventional tool paths, so different cutting parameters are used in slotting milling and general milling areas. The case study has demonstrated that the proposed methods can identify the optimal milling conditions and generate tool paths automatically and result in minimum milling time.

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31

Lee, K. H. y L. Cao. "A predictor-corrector zig-zag model for the bending of laminated composite plates". International Journal of Solids and Structures 33, n.º 6 (marzo de 1996): 879–97. http://dx.doi.org/10.1016/0020-7683(95)00079-p.

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32

Coddé, Joris, Wim Van der Veken y Martine Baelmans. "Assessment of a hydraulic network model for zig–zag cooled power transformer windings". Applied Thermal Engineering 80 (abril de 2015): 220–28. http://dx.doi.org/10.1016/j.applthermaleng.2015.01.063.

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33

Abidin, Yunus, Rianita Kartika Eka Putri y S. Nailul Muna Aljamaliah. "Multiliteracy literature models: solutions for reading learning models in the covid-19 pandemic era". JURNAL PENDIDIKAN DASAR NUSANTARA 7, n.º 2 (31 de enero de 2022): 269–80. http://dx.doi.org/10.29407/jpdn.v7i2.16685.

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Penelitian ini bertujuan untuk menguji efektivitas model multiliterasi literatur terhadap kemampuan siswa memahami cerita dongeng bergambar pada siswa sekolah dasar. Metode kuasieksperimen digunakan dalam penelitian ini. Sampel penelitian ini adalah siswa sekolah dasar di Kota Bandung yang dipilih dengan teknik purposive sampling. Instrumen yang digunakan adalah lembar penilaian produk menceritakan kembali cerita dongeng berupa zig-zag book. Hasil penelitian menunjukkan bahwa model multiliterasi literatur efektif meningkatkan kemampuan siswa memahami cerita dongeng bergambar pada siswa sekolah dasar. Berdasarkan hal ini, model multiliterasi literatur dapat dijadikan model alternatif dalam pembelajaran di sekolah dasar.

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34

HAMZAH, AFIQ, M. T. AHMADI y RAZALI ISMAIL. "QUANTUM CAPACITANCE EFFECT ON ZIG-ZAG GRAPHENE NANOSCROLLS (ZGNS) (16, 0)". Modern Physics Letters B 27, n.º 01 (26 de noviembre de 2012): 1350002. http://dx.doi.org/10.1142/s0217984913500024.

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Miniaturization of electronic devices carries them to the quantum limits which mean quantum effect will be dominant in nano-size device characterization. A first band analytical model of the quantum capacitance for (16, 0) zig-zag graphene nanoscroll (ZGNS) is presented. The behavior of the quantum capacitance within the degeneracy limits is approximated using the Maxwell–Boltzmann approximation within a range of E - EF > 3KBT. The quantum capacitance is subsequently derived from the carrier density of the ZGNS due to its significance within one-dimensional (1D) devices by employing the Taylor's series expansion for parabolic energy band structure approximation. Additionally, the quantum capacitance analytical derivation in term of ZGNS physical form considering the Archimedean spiral-type structure is modeled. Because of its unique geometry structure which provides high area for intercalation, it is expected that ZGNS structure (length and interlayer distances) will alter the quantum capacitance. We also report that at first sub-band of (16, 0) ZGNS the quantum capacitance reach degenerate limit at approximately of ≅ 0.49 × 10-10 F/m @ 49 pF/m .

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35

Safitra, Arrad Ghani. "STUDI NUMERIK PENGARUH JUMLAH SALURAN KOLEKTOR SURYA BENTUK SEGITIGA DENGAN POLA ALIRAN ZIG-ZAG". Jurnal Technopreneur (JTech) 9, n.º 2 (3 de noviembre de 2021): 63–70. http://dx.doi.org/10.30869/jtech.v9i2.757.

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Kolektor surya terus mengalami perkembangan untuk menghasilkan kualitas udara panas dengan temperatur yang tinggi. Pada penelitian ini menganalisa pengaruh jumlah saluran kolektor surya bentuk segitiga dengan pola aliran zig-zag. Variasi yang digunakan antara lain 8, 7, dan 6 saluran. Tujuan dari penelitian ini adalah merupakan inovasi pada proses pemanasan udara di dalam kolektor bentuk segitiga dengan pola aliran zig-zag dapat memperbanyak dan memperpanjang proses penyerapan panas matahari oleh udara. Penelitian dilakukan secara numerik dengan metode komputasi fluida. Tahapan awal adalah melakukan pemodelan secara tiga dimensi dan melakukan proses meshing. Tahapan kedua menentukan kondisi batas dan melakukan simulasi dengan dan tahapan terakhir adalah mengambil hasil simulasi untu dianalisa. Kondisi batas yang digunakan pada penelitian ini posisi masukkan merupakan velocity inlet dengan udara memiliki kecepatan sebesar 19,6 m/s dan temperatur 300 K. Sisi luaran yaitu pressure outlet dan heat flux disisi bagian wall heating saluran sebesar 750 W/m2. Parameter simulasi menggunakan RNG k-ε viscous model dengan scheme SIMPLEC, momentum, dan turbulent kinetic energy menggunakan diskritisasi second-order upwind. Hasil penelitian menunjukkan kolektor segitiga dengan jumlah 7 saluran memiliki hasil dengan temperatur udara paling tinggi yaitu sebesar 41.86 K dan Bilangan Nusselt tertinggi sebesar 2.68.

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36

Eftimova, Andreana. "Thematic Organization of Conversations in the Voip Application Viber". Postmodernism Problems 10, n.º 1 (2 de abril de 2020): 3–17. http://dx.doi.org/10.46324/pmp2001003.

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In a large number of social media and mobile applications, a new hybrid oral-writing formation is emerging, which is called from linguists' written spoken speech with similar features to both written and oral speech, but also has its own distinctive features. This study will illustrate the thematic structure of a conversation using the VoIP application Viber to highlight the most common model of a zig-zag themed organization and its specifics.

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37

Siwindarto, Ponco, Fadila Norasarin Eritha y M. Aswin. "OPTIMASI KONTROL PADA MANEUVERING KAPAL MENGGUNAKAN NI SB-RIO". Wave: Jurnal Ilmiah Teknologi Maritim 13, n.º 2 (29 de diciembre de 2019): 83–90. http://dx.doi.org/10.29122/jurnalwave.v13i2.3883.

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Maneuvering kapal merupakan karakteristik dari sebuah kapal. Uji manever kapal sangat penting dan salah satu pengujiannya adalah zigzag. Jurnal ini menyodorkan salah satu sistem kontrol pada maneuvering kapal menggunakan NI SB-RIO yang memiliki dimensi kecil dan terkategori ringan dibandingkan pendahulunya. Perancangan sistem autopilot ini divalidasi melalui simulasi uji zigzag model kapal dan dari hasil validasi ini didapatkan bahwa sistem kontrol ini berfungsi dan mampu melakukan lintasan zig-zag sesuai yang diharapkan.

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38

Xavier, Pascal B., C. H. Chew y K. H. Lee. "An improved zig-zag model for the vibration of soft-cored unsymmetric sandwich beams". Composites Engineering 4, n.º 5 (enero de 1994): 549–64. http://dx.doi.org/10.1016/0961-9526(94)90022-1.

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39

Zhen, Wu, S. H. Lo y Ren Xiaohui. "A C0 zig-zag model for the analysis of angle-ply composite thick plates". Composite Structures 127 (septiembre de 2015): 211–23. http://dx.doi.org/10.1016/j.compstruct.2014.10.008.

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40

Nguyen, Sy-Ngoc, Jaehun Lee y Maenghyo Cho. "Viscoelastic behavior of Naghdi shell model based on efficient higher-order zig-zag theory". Composite Structures 164 (marzo de 2017): 304–15. http://dx.doi.org/10.1016/j.compstruct.2016.11.050.

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41

Wu, Zhaotian y Chuwei Zhou. "Progressive multi-damage analysis of composite laminate using higher order zig-zag plate theory". Advances in Mechanical Engineering 12, n.º 4 (abril de 2020): 168781402091536. http://dx.doi.org/10.1177/1687814020915367.

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In this article, a finite element model of multi-layer composite laminates with delamination based on higher order zig-zag theory is studied for the progressive delamination analysis. The degrees of freedom are simplified by the continuity conditions of shear stress between layers and the free-surface conditions at the bottom and top of laminates. The numbers of degrees of freedom are not reduced with this method while the model can take the initiation of delamination into consideration in return. Static loading analysis is implemented to simulate the performance in delamination resistance with two different plies and under two different boundary conditions. The present model can present good performance in the prediction of delamination phenomenon.

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42

Arifin, Zainal, Rubiyatno Rubiyatno y Marhadi Saputro. "PENGEMBANGAN MODEL PEMBELAJARAN AKTIVITAS JASMANI BAGI ANAK SD SLB TUNAGRAHITA KOTA PONTIANAK". Jurnal Pendidikan Olahraga 9, n.º 2 (18 de diciembre de 2020): 220–30. http://dx.doi.org/10.31571/jpo.v9i2.2074.

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Penelitian ini bertujuan engembangkan model permainan bagi siswa tunagrahita di kota Pontianak. Berdasarkan wawancara dan observasi disimpulkan bahwa selama ini belum optimalnya pembelajaran penjas khususnya bagi siswa tunagrahita serta kurangnya inovasi pembelajaran yang menarik. Kurangnya model permainan dalam pengembangan pembelajaran aktivitas jasmani tersebut membuat peneliti tertarik mengembangkan pembelajaran untuk meningkatkan motivasi gerak siswa khususnya pada aspek jasmani bagi siswa tunagrahita. Metode penelitian yang digunakan dalam penelitian ini yaitu penelitian pengembangan. Instrumen pengumpulan data menggunakan pedoman wawancara dan skala nilai. Hasil penelitian berupa buku permainan aktivitas pembelajaran jasmani untuk siswatunagrahita yang berisikan lima jenis permainan, yaitu: (1) permainan petunjuk suara, (2) lari zig-zag, (3) bendera ceria, (4) jembatan seru (5) lempar hulahoop

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43

Wigunawangsa, Tiar Novendra, Sapto Adi, Slamet Raharjo y Mahmud Yunus. "Pengaruh Latihan Zig-Zag Run Terhadap Kelincahan (Agility) Pemain Futsal Wakanda Fc Malang". Sport Science and Health 4, n.º 10 (30 de octubre de 2022): 894–97. http://dx.doi.org/10.17977/um062v4i102022p894-897.

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Abstract: Futsal is a sport that is quite popular. Futsal includes mini football which is played indoors and each team has 5 players. Futsal game really need physical factors, including agility. Agility is changing movements in a short time. Agility can be used to dribbling past and avoiding opponents. So to increase agitily using zig-zag run exercise. The research model is pre-experimental design and one group pretest posttest design. Using a sample of Wakanda Fc Malang futsal players as many as 11 players using purposive sampling method. Using a test instrument, namely the illinois agility test. Data collection techniques include pre-experimental, observation and agility tests. Usind data snalysis in the form of paired sample t-test using the IBM SPSS statistic for windows version 25 application. The meaning of 0,00 less than 0,05 explained that H0 was rejected and H1 was accepted, so there was an effect. Abstrak: Futsal menjadi salah-satu cabang olahraga permainan yang cukup populer. Futsal termasuk sepakbola mini yang dilakukan didalam ruangandan setiap tim terdapat 5 pemain. Permainan futsal sangat membutuhkan faktor fisik antara lain kelincahan. Kelincahan adalah merubah gerakan dalam waktu yang singkat. Kelincahan dapat digunakan untuk mendribbling melewati dan menghindar dari lawan. Sehingga untuk meningkatkan kelincahan menggunakan latihan zig-zag run. Digunakan model penelitian pre-experimental design dan rancangan one group pretest posttest design. Menggunakan sampel pemain futsal Wakanda Fc Malang sebanyak 11 pemain dengan menggunakan metode purposive sampling. Menggunakan instrumen tes yaitu illinois agility test. Teknik pengumpulan data antara lain pra eksperimen, observasi dan tes kelincahan. Menggunakan analisis data berupa uji t-amatan ulangan (paired sample t-test) menggunakan aplikasi IBM SPSS statistic for windows version 25. Makna dari 0,00 kurang dari 0,05 dijelaskan bahwa H0 ditolak dan H1 diterima, sehingga terdapat pengaruh.

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44

Ji, Chao, James D. Englehardt y Cynthia Juyne Beegle-Krause. "Design of Real—Time Sampling Strategies for Submerged Oil Based on Probabilistic Model Predictions". Journal of Marine Science and Engineering 8, n.º 12 (3 de diciembre de 2020): 984. http://dx.doi.org/10.3390/jmse8120984.

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Locating and tracking submerged oil in the mid depths of the ocean is challenging during an oil spill response, due to the deep, wide-spread and long-lasting distributions of submerged oil. Due to the limited area that a ship or AUV can visit, efficient sampling methods are needed to reveal the real distributions of submerged oil. In this paper, several sampling plans are developed for collecting submerged oil samples using different sampling methods combined with forecasts by a submerged oil model, SOSim (Subsurface Oil Simulator). SOSim is a Bayesian probabilistic model that uses real time field oil concentration data as input to locate and forecast the movement of submerged oil. Sampling plans comprise two phases: the first phase for initial field data collection prior to SOSim assessments, and the second phase based on the SOSim assessments. Several environmental sampling techniques including the systematic random, modified station plans as well zig-zag patterns are evaluated for the first phase. The data using the first phase sampling plan are then input to SOSim to produce submerged oil distributions in time. The second phase sampling methods (systematic random combined with the kriging-based sampling method and naive zig-zag sampling method) are applied to design the sampling plans within the submerged oil area predicted by SOSim. The sampled data obtained using the second phase sampling methods are input to SOSim to update the model’s assessments. The performance of the sampling methods is evaluated by comparing SOSim predictions using the sampled data from the proposed sampling methods with simulated submerged oil distributions during the Deepwater Horizon spill by the OSCAR (oil spill contingency and response) oil spill model. The proposed sampling methods, coupled with the use of the SOSim model, are shown to provide an efficient approach to guide oil spill response efforts.

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45

Zhen, Wu, Chen Jian y Chen Wanji. "Reddy-type zig-zag model for multilayered composite plate based on the HW variational theorem". Mechanics of Advanced Materials and Structures 25, n.º 11 (6 de julio de 2017): 964–74. http://dx.doi.org/10.1080/15376494.2017.1323142.

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46

Kapuria, S., P. C. Dumir, A. Ahmed y N. Alam. "Finite element model of efficient zig-zag theory for static analysis of hybrid piezoelectric beams". Computational Mechanics 34, n.º 6 (23 de junio de 2004): 475–83. http://dx.doi.org/10.1007/s00466-004-0592-y.

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47

Hontinfinde, S. I. V., J. Kple, T. D. Oke, F. Zounmenou, J. Adda y F. Hontinfinde. "Nanofacet-density scaling on zig-zag carbon nanotubes within the kinetic 5-vertex growth model". Physica A: Statistical Mechanics and its Applications 608 (diciembre de 2022): 128278. http://dx.doi.org/10.1016/j.physa.2022.128278.

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48

Yang, Lin Jia, Zuo Chang Yang, Xiao Ri Gao y Yi Han Tao. "Effect of Stabilizing Fins on the Indexes of Ship Manoeuvrability". Applied Mechanics and Materials 273 (enero de 2013): 167–71. http://dx.doi.org/10.4028/www.scientific.net/amm.273.167.

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Too much ship model examinations have been carried out for understanding the ship’s manoeuvrability. A little data of full-scale ship examinations can be obtained because it is difficult and expensive for researchers. In this paper, the zig-zag test was done by a training ship equipped with a lot of measure apparatus and fin stabilizer, and then the manoeuvrability indexes K and T was been calculated by the Nomoto method and test data, finally, the effect of fin stabilizer on the manoeuvrability of the ship was obtained relying on the analyzed results.

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49

WANG, C. M., Z. Y. TAY, A. N. R. CHOWDHUARY, W. H. DUAN, Y. Y. ZHANG y N. SILVESTRE. "EXAMINATION OF CYLINDRICAL SHELL THEORIES FOR BUCKLING OF CARBON NANOTUBES". International Journal of Structural Stability and Dynamics 11, n.º 06 (21 de noviembre de 2011): 1035–58. http://dx.doi.org/10.1142/s0219455411004464.

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This paper examines the validity and accuracy of cylindrical shell theories in predicting the critical buckling strains of axially loaded single-walled carbon nanotubes (CNTs). The shell theories considered are the Donnell thin shell theory (DST), the Sanders thin shell theory (SST), and the first-order shear deformation (thick) shell theory (FSDST). Molecular dynamic (MD) simulation solutions for armchair and zig-zag CNTs with clamped ends were used as reference results to assess the shell models. The MD simulations were carried out at room temperature to eliminate the thermal effect on the buckling behavior. By adopting Young's modulus of 5.5 TPa, Poisson's ratio of 0.19, and tube thickness of 0.066 nm, it was found that DST is not able to capture the length dependency of the critical buckling strains and thus it should not be used for buckling analysis of CNTs. On the other hand, SST and FSDST are able to predict the critical buckling strains of armchair and zig-zag CNTs reasonably well for all aspect ratios, especially the results produced by the FSDST are found to be closer to the MD simulation results, because it allows for the effect of transverse shear deformation that becomes significant for CNTs with small aspect ratios. Thus, FSDST is recommended as a very suitable and convenient continuum mechanics model for buckling analysis of CNTs. The superior FSDST model is used to generate critical buckling strains of axially loaded single-walled CNT with different boundary conditions. These results should be useful for designers of nanodevices that make use of CNTs as axially loaded members. It is worth noting that for long and moderately long CNTs, the Timoshenko beam model may be used instead due to its simplicity.

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50

Magnucki, Krzysztof, Dennis Alsdorf, Jerzy Lewiński, Michał Kowalski, Alexander Richter y Andrzej Zbierski. "Analytical, FEM-numerical and experimental studies of bending of a sandwich plate-strip with metal foam core". Rail Vehicles, n.º 3 (30 de septiembre de 2020): 1–19. http://dx.doi.org/10.53502/rail-138552.

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Przedmiotem badań jest trójwarstwowe pasmo płytowe poddane czteropunktowemu zginaniu. Opracowano analityczny model tego pasma, korzystając z klasycznej teorii linii łamanej nazywanej teorią Zig-Zag. W paśmie tym wyróżniono trzy przedziały: dwa brzegowe, w których występuje zginanie i ścinanie oraz jeden środkowy, w którym występuje czyste zginanie. Wyznaczono całkowite ugięcie maksymalne pasma płytowego oraz maksymalne ugięcie odcinka środkowego. Przeprowadzono obliczenia numeryczne metodą elementów skończonych (MES) dla takiego samego modelu pasma, jak wyżej wspomniany model analityczny. Próbę doświadczalną przeprowadzono na stanowisku badawczym w Instytucie Pojazdów Szynowych. Porównano wyniki badań analitycznych, numerycznych i doświadczalnych. Analizowane płyty warstwowe mogą być stosowane, m. in. jako części podłogi lub poszycia pojazdu szynowego.

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