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Journal articles on the topic '1D code'

Author: Grafiati

Published: 10 March 2023

Last updated: 28 July 2025

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1

Yeh, Bih-Chyun. "Utilizing States of Polarization in One-Dimensional Corite Codes with Two-Code Keying for Optical Code-Division Multiple Access." Photonics 11, no. 9 (2024): 819. http://dx.doi.org/10.3390/photonics11090819.

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We propose a novel family of codes comprising two mutually orthogonal states of polarization (SOPs) for the spectral encoding of one-dimensional (1D) Corite codes with two-code keying (TCK) for use in the spectral amplitude coding (SAC) of optical code-division multiple access (OCDMA) networks. We design these 1D Corite codes with TCK to create a specific code operation function, an encoding optical transmitter structure, and a decoding optical receiver structure, respectively. In the proposed system, multi-user interference (MUI) can occur due to interference from other simultaneous users. Ho

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Matem, Rima, S. A. Aljunid, M. N Junita, C. B. M Rashidi, and Israa Shihab Aqrab. "Enhancement of optical code division multiple access system based on 2D ZCC/MD spectral/spatial code." Indonesian Journal of Electrical Engineering and Computer Science 14, no. 2 (2019): 661. http://dx.doi.org/10.11591/ijeecs.v14.i2.pp661-667.

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<span>The combination of 1D zero cross correlation (ZCC) and 1D Multi Diagonal (MD) results a new two dimensional hybrid called 2D ZCC/MD code for spectral/spatial OCDMA system. The proposed code aims to enhance the functional qualities of Optical Code Division Multiple Access (OCDMA) and to overcome the limitations of one dimensional codes. In this paper, 2D ZCC/MD is evaluated at data rate; 622Mbps. A comparison of the proposed 2D ZCC/MD code to 1D Random Diagonal (RD) and 1D Modified Double Weight (MDW) highlight that 2D ZCC/MD can support a large number of active users even at the hi

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Matem, Rima, S. A. Aljunid, M. N. Junita, C. B. M. Rashidi, and Israa Shihab Aqrab. "Performance analysis of spectral/spatial of OCDMA system using 2D hybrid ZCC/MD code." Indonesian Journal of Electrical Engineering and Computer Science 13, no. 2 (2019): 569. http://dx.doi.org/10.11591/ijeecs.v13.i2.pp569-574.

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This paper proposes a new spectral/spatial code for Spectral Amplitude Coding in Optical Coding Division Multiple Access (SAC-OCDMA) called two-Dimensional hybrid ZCC/MD code. The new code combines two of the one –dimensional codes which are Zero Cross Correlation (1D ZCC) and Multi-Diagonal code (1D MD). Moreover, it produces a zero cross correlation property for each code. The main goal of this proposed code is to mitigate Phase Induced Intensity Noise and eliminate Multiple Access Interference (MAI). This proposed code can provide a better performance comparing to other codes as 2D FCC/MDW

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Matem, Rima, S. A. Aljunid, M. N. Junita, C. B.M Rashidi, and Israa Shihab Aqrab. "Performance analysis of spectral/spatial of OCDMA system using 2D hybrid ZCC/MD code." Indonesian Journal of Electrical Engineering and Computer Science 13, no. 2 (2020): 569–74. https://doi.org/10.11591/ijeecs.v13.i2.pp569-574.

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This paper proposes a new spectral/spatial code for Spectral Amplitude Coding in Optical Coding Division Multiple Access (SAC-OCDMA) called two-Dimensional hybrid ZCC/MD code. The new code combines two of the one –dimensional codes which are Zero Cross Correlation (1D ZCC) and Multi-Diagonal code (1D MD). Moreover, it produces a zero cross correlation property for each code. The main goal of this proposed code is to mitigate Phase Induced Intensity Noise and eliminate Multiple Access Interference (MAI). This proposed code can provide a better performance comparing to other codes as 2D FC

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WANG, KONGQIAO, YANMING ZOU, and HAO WANG. "1D BAR CODE READING ON CAMERA PHONES." International Journal of Image and Graphics 07, no. 03 (2007): 529–50. http://dx.doi.org/10.1142/s0219467807002805.

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The availability of camera phones provides people with a mobile platform for decoding bar codes, whereas conventional scanners lack mobility. However, using a normal camera phone in such applications is challenging due to the out-of-focus problem. In this paper, we present the research effort on the bar code reading algorithms using a VGA camera phone, NOKIA 7650. EAN-13, a widely used 1D bar code standard, is taken as an example to show the efficiency of the method. A wavelet-based bar code region location and knowledge-based bar code segmentation scheme is applied to extract bar code charact

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Yeh, Bih-Chyun. "Noncoherent Spectral Optical CDMA System Using 1D Active Weight Two-Code Keying Codes." Mathematical Problems in Engineering 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/3724843.

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We propose a new family of one-dimensional (1D) active weight two-code keying (TCK) in spectral amplitude coding (SAC) optical code division multiple access (OCDMA) networks. We use encoding and decoding transfer functions to operate the 1D active weight TCK. The proposed structure includes an optical line terminal (OLT) and optical network units (ONUs) to produce the encoding and decoding codes of the proposed OLT and ONUs, respectively. The proposed ONU uses the modified cross-correlation to remove interferences from other simultaneous users, that is, the multiuser interference (MUI). When t

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Sharma, Teena, Abdellah Chehri, Paul Fortier, Hassan Yousif Ahmed, Medien Zeghid, and Waqas A. Imtiaz. "Optical Code Construction of 2D Spectral/Spatial BIBD Codes for SAC-OCDMA Systems." Applied Sciences 11, no. 2 (2021): 783. http://dx.doi.org/10.3390/app11020783.

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Optical code division multiple access (OCDMA) shows limitations in terms of the inefficient bandwidth utilization and low spectral density with one-dimensional (1D) codes. To overcome these limitations, a novel design is presented using a two dimensional (2D) spectral/spatial multiwavelength coding scheme. The proposed code is constructed using a 1D balanced incomplete block design (BIBD) technique. Theoretical and analytical results indicate that the proposed code provided improvement in the number of simultaneous users, code construction, and cross-correlation and minimized noise. Moreover,

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Sécher, Matthieu, Philippe Ung, Eric Valette, Magali Jodeau, and Nicole Goutal. "COURLIS: a 1D suspension and bedload code." E3S Web of Conferences 40 (2018): 05038. http://dx.doi.org/10.1051/e3sconf/20184005038.

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COURLIS is a 1D sedimentology module coupled with MASCARET, 1D hydraulic code of the TELEMAC-MASCARET open source system. The code has been developed for more than 10 years, mainly for suspension sediment transport. Recently, the need of a 1D bedload code has been identified to model the long term evolution of rivers and reservoirs (several decades). New numerical schemes were implemented, some improvements were done in the geometry evolution algorithms. In terms of performance and robustness, the best scheme implemented is a finite volume upwind/downwind scheme. Several solutions are implemen

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Vidal, Jean-Philippe, Sabine Moisan, Jean-Baptiste Faure, and Denis Dartus. "Towards a reasoned 1D river model calibration." Journal of Hydroinformatics 7, no. 2 (2005): 91–104. http://dx.doi.org/10.2166/hydro.2005.0009.

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Model calibration remains a critical step in numerical modelling. After many attempts to automate this task in water-related domains, questions about the actual need for calibrating physics-based models are still open. This paper proposes a framework for good model calibration practice for end-users of 1D hydraulic simulation codes. This framework includes a formalisation of objects used in 1D river hydraulics along with a generic conceptual description of the model calibration process. It was implemented within a knowledge-based system integrating a simulation code and expert knowledge about

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Yen, Chih-Ta, and Chih-Ming Chen. "BER Analysis Using Beat Probability Method of 3D Optical CDMA Networks with Double Balanced Detection." Mathematical Problems in Engineering 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/456829.

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This study proposes novel three-dimensional (3D) matrices of wavelength/time/spatial code for code-division multiple-access (OCDMA) networks, with a double balanced detection mechanism. We construct 3D carrier-hopping prime/modified prime (CHP/MP) codes by extending a two-dimensional (2D) CHP code integrated with a one-dimensional (1D) MP code. The corresponding coder/decoder pairs were based on fiber Bragg gratings (FBGs) and tunable optical delay lines integrated with splitters/combiners. System performance was enhanced by the low cross correlation properties of the 3D code designed to avoid

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O. A., Oni, Musibau A. O., Wahab G. A., and Koleoso A. G. "Building of Barcode and QR Code Reader Device." Advanced Journal of Science, Technology and Engineering 4, no. 1 (2024): 105–11. http://dx.doi.org/10.52589/ajste-opzmzn49.

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This study focuses on building a QR and barcode reader device to scan the barcode or QR code (1D/2D) and display the read information on the Liquid Crystal Display (LCD). With this device we can scan and read all the barcode and QR codes through an OLED display. The proposed device can work in the dark, have a stable performance as well as fast decoding speed. It can easily capture barcodes 1D, 2D on labels, paper, and mobile phone or computer displays sensitively and accurately.

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Balaž, Antun, Ivana Vidanović, Danica Stojiljković, Dušan Vudragović, Aleksandar Belić, and Aleksandar Bogojević. "SPEEDUP Code for Calculation of Transition Amplitudes via the Effective Action Approach." Communications in Computational Physics 11, no. 3 (2012): 739–55. http://dx.doi.org/10.4208/cicp.131210.180411a.

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AbstractWe present Path Integral Monte Carlo C code for calculation of quantum mechanical transition amplitudes for 1D models. The SPEEDUP C code is based on the use of higher-order short-time effective actions and implemented to the maximal order p=18 in the time of propagation (Monte Carlo time step), which substantially improves the convergence of discretized amplitudes to their exact continuum values. Symbolic derivation of higher-order effective actions is implemented in SPEEDUP Mathematica codes, using the recursive Schrödinger equation approach. In addition to the general 1D quantum the

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Gupta, Sumit, and Aditya Goel. "Design of Multiservice Code (MS) in Spectral/Temporal/Spatial Domain for OCDMA System." Journal of Optical Communications 41, no. 3 (2020): 305–17. http://dx.doi.org/10.1515/joc-2017-0180.

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AbstractThis paper explores the design of multiservice code (MS) in spectral, time spreading and wavelength domains (3-Dimensional). The proposed 3D code is designed in such a manner that follows the ideal in phase unit cross correlation in spectral, time spreading and wavelength domains. The proposed encoder generates the MS code effectively in 3D domain and decoder suppresses the multi-user interferences successfully. Performance analyses are carried out by considering the all noises such as phase induce intensity noise(PIIN), shot noise and thermal noise. The analysis of 3D-MS code for vari

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Matem, Rima, S. A. Aljunid, M. N. Junita, C. B. M. Rashidi, and Israa Shihab Ahmed. "Influence of Code Size Variation on the Performance of 2D Hybrid ZCC/MD in OCDMA System." MATEC Web of Conferences 150 (2018): 06018. http://dx.doi.org/10.1051/matecconf/201815006018.

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Several two dimensional OCDMA have been developed in order to overcome many problems in optical network, enhancing cardinality, suppress Multiple Access Interference (MAI) and mitigate Phase Induced Intensity Noise (PIIN). This paper propose a new 2D hybrid ZCC/MD code combining between 1D ZCC spectral encoding where M is its code length and 1D MD spatial spreading where N is its code length. The spatial spreading (N) code length offers a good cardinality so it represents the main effect to enhance the performance of the system compared to the spectral (M) code length according to the numerica

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Rahmani, Mohamed, Abdelhamid Cherifi, Abdullah S. Karar, Ghoutia Naima Sabri, and Boubakar S. Bouazza. "Contribution of New Three-Dimensional Code Based on the VWZCC Code Extension in Eliminating Multiple Access Interference in Optical CDMA Networks." Photonics 9, no. 5 (2022): 310. http://dx.doi.org/10.3390/photonics9050310.

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In order to solve the problem of one-dimensional code length, two-dimensional code spatial length, phase induced intensity noise PIIN effect, improved system capacity, and increased the number of simultaneous users, a new three-dimensional spectral/time/spatial variable weight zero cross correlation code for non-coherent spectral amplitude coding-optical code division multiple access (3D-VWZCC-SAC-OCDMA) is proposed in this paper. Its construction is based on a one-dimensional (1D) spectral sequence and two-dimensional (2D) temporal/spatial sequences, which are characterized by the property of

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Karrach, Ladislav, Elena Pivarčiová, and Yury Rafailovich Nikitin. "Comparing the impact of different cameras and image resolution to recognize the data matrix codes." Journal of Electrical Engineering 69, no. 4 (2018): 286–92. http://dx.doi.org/10.2478/jee-2018-0040.

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Abstract Data matrix codes are two-dimensional (2D) matrix bar codes, which are the descendants of the well known 1D bar codes. However, compared to 1D bar codes, they allow to store much more information in the same area. Comparing data matrix codes with QR codes, for example, we find them much more effective in marking small objects or in the case that you have only a very small area for placing a code in. Their capacity and ability of decoding also a code that is partly damaged make them an appropriate solution for industrial applications. In the following paper we compare the impact of var

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Bouarfa, A., M. Kandouci, A. Garadi, and H. Djellab. "PIIN Cancellation Using a Novel Receiving Architecture for Spectral/Spatial SAC-OCDMA System." Journal of Optical Communications 41, no. 3 (2020): 295–304. http://dx.doi.org/10.1515/joc-2017-0179.

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AbstractIncreasing the number of users presents a limitation in one-dimensional (1D) spectral amplitude coding (SAC) for Optical Code Division Multiple Access (OCDMA) system. In order to overcome this disadvantage, a new architecture of the two-dimensional wavelength/spatial SAC-OCDMA system using the multi-diagonal (MD) code has been proposed. The 2D-MD code possesses the same properties of 1D-MD code, which leads to total suppression of the multiple access interference. Unlike conventional receivers used in precedent studies, where the phase-induced intensity noise (PIIN) is a drawback, the

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Glisson, Allen W., and Atef Z. Elsherbeni. "An interactive 1D Matlab FDTD code for education." Computer Applications in Engineering Education 9, no. 2 (2001): 136–47. http://dx.doi.org/10.1002/cae.1015.

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Karrach, Ladislav, Elena Pivarčiová, and Pavol Bozek. "Recognition of Perspective Distorted QR Codes with a Partially Damaged Finder Pattern in Real Scene Images." Applied Sciences 10, no. 21 (2020): 7814. http://dx.doi.org/10.3390/app10217814.

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QR (Quick Response) codes are one of the most famous types of two-dimensional (2D) matrix barcodes, which are the descendants of well-known 1D barcodes. The mobile robots which move in certain operational space can use information and landmarks from environment for navigation and such information may be provided by QR Codes. We have proposed algorithm, which localizes a QR Code in an image in a few sequential steps. We start with image binarization, then we continue with QR Code localization, where we utilize characteristic Finder Patterns, which are located in three corners of a QR Code, and

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Fijalkow, Eric. "Numerical solution to the Vlasov equation: The 1D code." Computer Physics Communications 116, no. 2-3 (1999): 329–35. http://dx.doi.org/10.1016/s0010-4655(98)00147-7.

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Glasser, Alan H., and Kenneth Smith. "POS - A 1D time-dependent H+ ion source code." Computer Physics Communications 55, no. 3 (1989): 409–24. http://dx.doi.org/10.1016/0010-4655(89)90135-5.

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Napp, Diego, Ricardo Pereira, Raquel Pinto, and Paula Rocha. "Realization of 2D (2,2)–Periodic Encoders by Means of 2D Periodic Separable Roesser Models." International Journal of Applied Mathematics and Computer Science 29, no. 3 (2019): 527–39. http://dx.doi.org/10.2478/amcs-2019-0039.

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Abstract It is well known that convolutional codes are linear systems when they are defined over a finite field. A fundamental issue in the implementation of convolutional codes is to obtain a minimal state representation of the code. Compared with the literature on one-dimensional (1D) time-invariant convolutional codes, there exist relatively few results on the realization problem for time-varying 1D convolutional codes and even fewer if the convolutional codes are two-dimensional (2D). In this paper we consider 2D periodic convolutional codes and address the minimal state space realization

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Koten, Hasan, Mustafa Yilmaz, and M. Zafer Gul. "Compressed Biogas-Diesel Dual-Fuel Engine Optimization Study for Ultralow Emission." Advances in Mechanical Engineering 6 (January 1, 2014): 571063. http://dx.doi.org/10.1155/2014/571063.

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The aim of this study is to find out the optimum operating conditions in a diesel engine fueled with compressed biogas (CBG) and pilot diesel dual-fuel. One-dimensional (1D) and three-dimensional (3D) computational fluid dynamics (CFD) code and multiobjective optimization code were employed to investigate the influence of CBG-diesel dual-fuel combustion performance and exhaust emissions on a diesel engine. In this paper, 1D engine code and multiobjective optimization code were coupled and evaluated about 15000 cases to define the proper boundary conditions. In addition, selected single diesel

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Alligne, Sébastien, Antoine Béguin, Roland Jester-Zuerker, Jean Decaix, Cécile Münch, and Christophe Nicolet. "FMI Co-simulation 1D-3D SIMSEN-CFX." IOP Conference Series: Earth and Environmental Science 1483, no. 1 (2025): 012035. https://doi.org/10.1088/1755-1315/1483/1/012035.

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Abstract Hydraulic systems can be subjected to excitations induced by complex flow structure developed in any system’s component. The interaction between the hydraulic system and the excitation source can be predicted by performing a co-simulation between two independent simulation codes. One is resolving the fluid pipe system with a one-dimensional compressible code whereas the other one computes the three-dimensional flow in a given hydraulic system’s component which is the source of excitation. In the field of hydroelectric power plants, the one-dimensional SIMSEN software is widely used to

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Kamenski, I. V., and G. G. Borg. "A 1D cylindrical kinetic wave code for helicon plasma sources." Computer Physics Communications 113, no. 1 (1998): 10–32. http://dx.doi.org/10.1016/s0010-4655(98)00077-0.

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M P, Shreya, and Dr Anitha R. "A REVIEW ON STEGANOGRAPHY AND DATA HIDING IN QR CODE." International Research Journal of Computer Science 8, no. 8 (2021): 165–68. http://dx.doi.org/10.26562/irjcs.2021.v0808.001.

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In comparison to 1D barcodes, a two-dimensional matrix is regarded as a Quick-Response (QR) code which is a programme that contains a vast quantity of data. QR codes offer quick scanning, omnidirectional reading, and a variety of other benefits, such as error correction. Barcode scanners can readily reveal the content of QR codes. In reality, however, gratified QR apps could contain confidential information, like an electronic-ticket or an electronic-coupon. To safeguard quick response essence from unauthorized users or scanners, it should be password protected. We'll look at QR codes and diff

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Hursin, Mathieu, and Tatjana Jevremovic. "Agent code: Neutron transport benchmark example and extension to 3D lattice geometry." Nuclear Technology and Radiation Protection 20, no. 2 (2005): 10–16. http://dx.doi.org/10.2298/ntrp0502010h.

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The general methodology be hind 2D arbitrary geometry neutron transport AGENT code is the theory of R-functions, which al lows for simple modeling of complex geometries, and the method of characteristics, which solves the integral transport equation along characteristic neutron trajectories. This paper focuses on the extension of the methodology to ac count for 3D lattice geometries. Since the direct application of method of characteristics to 3D non-homogenized core con figuration may re quire a tremendous amount of memory and computing time, an alternative approximate solution based on coupl

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Alligne, S., N. Veuthey, A. Béguin, N. Ruchonnet, and C. Nicolet. "1D-3D co-simulation pipe resonance induced by cavitating vortex shedding." IOP Conference Series: Earth and Environmental Science 1411, no. 1 (2024): 012057. https://doi.org/10.1088/1755-1315/1411/1/012057.

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Abstract Hydraulic systems may experience excitation caused by complex flow patterns within various components of the system. A computational effective way to predict the interaction between the hydraulic system and the excitation source is to conduct a co-simulation using two independent simulation codes. One code models the fluid pipe system using a one-dimensional compressible approach, while the other code simulates the excitation source with a three-dimensional model. Recognized as a standard communication protocol for linking two simulation codes that solve a system of ordinary different

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Barve, Dr Manmeet, Ms Neelam Maske, Ms Shravani Naik, and Ms Mrunalini Munj. "Improving the Retailing Experience of the New Age Information-Seeking Consumers Using QR Code." MET Management Review 09, no. 01 (2022): 42–48. http://dx.doi.org/10.34047/mmr.2020.9107.

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Shopping your apparels by scanning your friend's clothes sounds bizarre, however QR technology can make it possible. This paper intends to introduce the idea of how QR Codes of shoppable links can be printed on the tags of apparels and can be scanned by the wearer's social group to shop the product anywhere and anytime. The QR technology was developed by an engineer at Denso Wave, a company located in Aichi, Japan. It started as 1D Barcode then progressed to a 2D barcode and now we have multi-coloured, customisable and personalised QR Codes. This technology has a long history. Since QR codes h

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Morel, P. "The Evolutionary Code Cesam: Numerical Techniques." International Astronomical Union Colloquium 137 (1993): 445–47. http://dx.doi.org/10.1017/s0252921100018200.

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AbstractCESAM is a consistent set of programs and routines designed for the calculations of stellar evolution. Untill now it allows the computation of the evolution from PMS or ZAMS to helium flash for stellar masses of some solar mass. It is constructed in such a way that all the physics works as external routines. The numerical techniques are based on the B-spline formalism. This formalism used both for the integration of the differential equations and for 1D and 2D interpolation schemes of various tables of physical data.

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Teodosio, Luigi, Dino Pirrello, and Luca Marchitto. "1D numerical study on hydrogen injection enabling ultra-lean combustion in a small gasoline Spark Ignition engine." E3S Web of Conferences 197 (2020): 06001. http://dx.doi.org/10.1051/e3sconf/202019706001.

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This paper deals with the effects of hydrogen port injection on combustion evolution, efficiency and exhaust emissions of a small turbocharged gasoline Spark-Ignition engine through a 1D numerical code. First, the experiments on the base engine architecture are performed at different speeds and at low/medium loads. The experimental findings are used to validate a 1D model of the whole engine, developed within a commercial code. 1D model is also refined with “user-defined” sub-models for an accurate description of the in-cylinder phenomena, namely turbulence, combustion, heat transfer, and emis

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Freschi, Rosa, Agapi Bakogianni, David John Rajendran, Eduardo Anselmi Palma, Lorenzo Talluri, and Ioannis Roumeliotis. "Flow Field Explorations in a Boundary Layer Pump Rotor for Improving 1D Design Codes." Designs 7, no. 1 (2023): 29. http://dx.doi.org/10.3390/designs7010029.

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Boundary layer pumps, although attractive due to their compactness, robustness and multi-fluid and phase-handling capability, have been reported to have low experimental efficiencies despite optimistic predictions from analytical models. A lower-order flow-physics-based analytical model that can be used as a 1D design code for sizing and predicting pump performance is described. The rotor component is modelled by means of the Navier–Stokes equations as simplified using velocity profiles in the inter-disk gap, while the volute is modelled using kinetic-energy-based coefficients inspired by cent

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Gallagher, A. J., M. Bergemann, R. Collet, et al. "Observational constraints on the origin of the elements." Astronomy & Astrophysics 634 (February 2020): A55. http://dx.doi.org/10.1051/0004-6361/201936104.

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Context. The pursuit of more realistic spectroscopic modelling and consistent abundances has led us to begin a new series of papers designed to improve current solar and stellar abundances of various atomic species. To achieve this, we have begun updating the three-dimensional (3D) non-local thermodynamic equilibrium (non-LTE) radiative transfer code, MULTI3D, and the equivalent one-dimensional (1D) non-LTE radiative transfer code, MULTI 2.3. Aims. We examine our improvements to these codes by redetermining the solar barium abundance. Barium was chosen for this test as it is an important diagn

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Prošek, Andrej, and Ovidiu-Adrian Berar. "BETHSY 9.1b test calculation with TRACE using 3D vessel component." Journal of Energy - Energija 62, no. 1-4 (2022): 93–103. http://dx.doi.org/10.37798/2013621-4221.

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Recently, several advanced multidimensional computational tools for simulating reactor system behavior during real and hypothetical transient scenarios were developed. One of such advanced, best-estimate reactor systems codes is TRAC/RELAP Advanced Computational Engine (TRACE), developed by the U.S. Nuclear Regulatory Commission. The advanced TRACE comes with a graphical user interface called SNAP (Symbolic Nuclear Analysis Package). It is intended for pre- and post-processing, running codes, RELAP5 to TRACE input deck conversion, input deck database generation etc. The TRACE code is still not

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Rizzuti, Federico, Raphael Hirschi, Cyril Georgy, David Arnett, Casey Meakin, and Alexander Murphy. "Turbulence and nuclear reactions in 3D hydrodynamics simulations of massive stars." EPJ Web of Conferences 279 (2023): 05001. http://dx.doi.org/10.1051/epjconf/202327905001.

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Our knowledge of massive star evolution and nucleosynthesis is limited by uncertainties related to multi-dimensional processes taking place in stellar interiors. Recently, theoretical works have started to improve 1D stellar evolution codes through the implementation of results from 3D hydrodynamics models, which are used to study multi-D processes on a short time range (minutes or hours) and improve 1D prescriptions. In these proceedings, we present results coming from a new set of high-resolution hydrodynamics simulations of the neon-burning shell in a massive star, employing the PROMPI code

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Hien, Nghiem Manh. "Stress-independent parameters for stress-strain relationship and damping in nonlinear one-dimensional seismic site response analysis." Journal of Science and Technology in Civil Engineering (STCE) - NUCE 15, no. 1 (2021): 14–29. http://dx.doi.org/10.31814/stce.nuce2021-15(1)-02.

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The modulus reduction and damping curves represent the nonlinear behavior of soil under cyclic load. In the literature, those curves were produced from lab tests of soil at particular confining stresses. This study developed a set of parameters that can be used to normalize the modulus reduction and damping curves to be stress-independent. The proposed formulations for the stress-independent parameters were implemented in the finite element code SRAP and validated through producing shear modulus reduction and damping curves that match the existed ones. Nonlinear 1D seismic site response analys

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Savard, N., G. Fubiani, R. Baartman, and M. Dehnel. "Implicit particle-in-cell development for ion source plasmas." Journal of Physics: Conference Series 2743, no. 1 (2024): 012003. http://dx.doi.org/10.1088/1742-6596/2743/1/012003.

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Abstract Particle-in-Cell (PIC) codes used to study plasma dynamics within ion sources typically use an explicit scheme. These methods can be slow when simulating regions of high electron density in ion sources, which require resolving the Debye length in space and the plasma frequency in time. Recent developments on fully-implicit PIC models in curvilinear geometries have shown that these spatial/time scales can be significantly decreased/increased respectively, allowing for notable speed-ups in simulation time, and thus making it a potential tool for studying the physics of ion sources. For

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Otsubo, Yuhei, Akira Otsuka, Mamoru Mimura, and Takeshi Sakaki. "o-glasses: Visualizing X86 Code From Binary Using a 1D-CNN." IEEE Access 8 (2020): 31753–63. http://dx.doi.org/10.1109/access.2020.2972358.

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Barrera, Marcela, Francisco Rubinelli, Ignacio Rey-Stolle, and Juan Plá. "Numerical simulation of Ge solar cells using D-AMPS-1D code." Physica B: Condensed Matter 407, no. 16 (2012): 3282–84. http://dx.doi.org/10.1016/j.physb.2011.12.087.

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Jackson, Z. J., J. R. Nicholas, and P. T. Ireland. "Development of a 1D thermofluid code for divertor target plate modeling." Fusion Engineering and Design 147 (October 2019): 111237. http://dx.doi.org/10.1016/j.fusengdes.2019.06.010.

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Bonifacio, P., E. Caffau, H. G. Ludwig, and M. Steffen. "LTE Model Atmospheres: MARCS, ATLAS and CO5BOLD." Proceedings of the International Astronomical Union 7, S282 (2011): 213–20. http://dx.doi.org/10.1017/s1743921311027402.

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AbstractIn this talk, we review the basic assumptions and physics covered by classical 1D LTE model atmospheres. We will focus on ATLAS and MARCS models of F-G-K stars and describe what resources are available through the web, both in terms of codes and model-atmosphere grids. We describe the advances made in hydrodynamical simulations of convective stellar atmospheres with the CO5BOLD code and what grids and resources are available, with a prospect of what will be available in the near future.

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Yousif Ahmed, Hassan, Medien Zeghid, Waqas A.Imtiaz, Teena Sharma, Abdellah Chehri, and Paul Fortier. "Two-Dimensional Permutation Vectors’ (PV) Code for Optical Code Division Multiple Access Systems." Entropy 22, no. 5 (2020): 576. http://dx.doi.org/10.3390/e22050576.

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In this paper, we present a new algorithm to generate two-dimensional (2D) permutation vectors’ (PV) code for incoherent optical code division multiple access (OCDMA) system to suppress multiple access interference (MAI) and system complexity. The proposed code design approach is based on wavelength-hopping time-spreading (WHTS) technique for code generation. All possible combinations of PV code sets were attained by employing all permutations of the vectors with repetition of each vector weight (W) times. Further, 2D-PV code set was constructed by combining two code sequences of the 1D-PV cod

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Karrach, Ladislav, Elena Pivarčiová, and Pavol Božek. "Identification of QR Code Perspective Distortion Based on Edge Directions and Edge Projections Analysis." Journal of Imaging 6, no. 7 (2020): 67. http://dx.doi.org/10.3390/jimaging6070067.

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QR (quick response) Codes are one of the most popular types of two-dimensional (2D) matrix codes currently used in a wide variety of fields. Two-dimensional matrix codes, compared to 1D bar codes, can encode significantly more data in the same area. We have compared algorithms capable of localizing multiple QR Codes in an image using typical finder patterns, which are present in three corners of a QR Code. Finally, we present a novel approach to identify perspective distortion by analyzing the direction of horizontal and vertical edges and by maximizing the standard deviation of horizontal and

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Suresh Babu, Sumith Babu, and R. Kumar. "Multigroup Synchronization in 1D-Bernoulli Chaotic Collaborative CDMA." Wireless Communications and Mobile Computing 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/7561757.

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Code-division multiple access (CDMA) has played a remarkable role in the field of wireless communication systems, and its capacity and security requirements are still being addressed. Collaborative multiuser transmission and detection are a contemporary technique used in CDMA systems. The performance of these systems is governed by the proper accommodation of the users and by proper synchronization schemes. The major research concerns in the existing multiuser overloaded CDMA schemes are (i) statistically uncorrelated PN sequences that cause multiple-access interference (MAI) and (ii) the secu

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Rodríguez-González, Ary, Miriam Peña, Liliana Hernández-Martínez, et al. "Numerical Models of Planetary Nebulae with Different Episodes of Mass Ejection: The Particular Case of HuBi 1." Astrophysical Journal 955, no. 2 (2023): 151. http://dx.doi.org/10.3847/1538-4357/acf0bc.

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Abstract We have studied the evolution of HuBi 1–like planetary nebulae, considering several stages of mass injection. We have carried out numerical ionization+1D hydrodynamics+atomic/ionic rate models with our code Coral1d to reproduce planetary nebulae that present multiple shells produced by different ejection events around the ionizing source. We are interested in comparing numerical simulations with Hα and [N ii] λ6584 emission structures and the position–velocity diagrams observed for HuBi 1. This object also has a phase where it has drastically decreased the injection of ionized photons

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Liu, Rong, Jianin Liu, Jianxin Wang, Zhuo Liu, and Rongwen Guo. "1D electromagnetic response modeling with arbitrary source-receiver geometry based on vector potential and its implementation in MATLAB." GEOPHYSICS 85, no. 3 (2020): F27—F38. http://dx.doi.org/10.1190/geo2019-0224.1.

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The calculation of 1D electromagnetic (EM) responses of dipole sources is considered as a fundamental computation kernel in several geophysical applications, ranging from EM sensitivity analysis to high-dimensional EM forward modeling and inversion. To solve the EM responses caused by electric and magnetic dipoles with different orientations, we have developed an open-source MATLAB code for a complete treatment, which allows for an arbitrary transmitter-receiver geometry in the multilayered earth. A complete derivation of the EM field expressions with simplified exponent terms for all traditio

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Leboeuf, Jean-Noel G., Viktor K. Decyk, David E. Newman, and Raul Sanchez. "Implementation of 2D Domain Decomposition in the UCAN Gyrokinetic Particle-in-Cell Code and Resulting Performance of UCAN2." Communications in Computational Physics 19, no. 1 (2016): 205–25. http://dx.doi.org/10.4208/cicp.070115.030715a.

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AbstractThe massively parallel, nonlinear, three-dimensional (3D), toroidal, electrostatic, gyrokinetic, particle-in-cell (PIC), Cartesian geometry UCAN code, with particle ions and adiabatic electrons, has been successfully exercised to identify non-diffusive transport characteristics in present day tokamak discharges. The limitation in applying UCAN to larger scale discharges is the 1D domain decomposition in the toroidal (or z-) direction for massively parallel implementation using MPI which has restricted the calculations to a few hundred ion Larmor radii or gyroradii per plasma minor radi

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Muscato, O., S. Rinaudo, and P. Falsaperla. "Calibration of a One Dimensional Hydrodynamic Simulator with Monte Carlo Data." VLSI Design 8, no. 1-4 (1998): 515–20. http://dx.doi.org/10.1155/1998/47467.

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In this paper we use the code Exemplar for matching a hydrodynamic 1D, time-dependent simulator and the transport coefficients obtained by the Monte Carlo simulator Damocles. This code is based on the Least Square method and it does not require any a priori knowledge about the simulator (analytical form of the equations etc.). The stationary electron flow in a one dimensional n+−n−n+ submicron silicon diode is simulated.

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Peng, Ronghua, Bo Han, Yajun Liu, and Xiangyun Hu. "EM3DANI: A Julia package for fully anisotropic 3D forward modeling of electromagnetic data." GEOPHYSICS 86, no. 5 (2021): F49—F60. http://dx.doi.org/10.1190/geo2020-0489.1.

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Forward modeling is vital for 3D inversion and interpretation of electromagnetic (EM) data in anisotropic media, which is one of the major challenges in the field of EM geophysics. However, there are few freely available 3D codes that are capable of modeling EM responses in fully anisotropic media. In addition, most existing 3D EM codes are written in low-level languages (LLs) such as C and Fortran, making them difficult to read, maintain, and extend. Taking advantage of recent progress in computer technology and numerical methods, we have developed an open-source package for forward modeling

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Osuský, Filip, Branislav Vrban, Peter Ballo, Štefan Čerba, Jakub Lüley, and Gabriel Farkas. "NUMERICAL MULTIGROUP TRANSIENT ANALYSIS OF SLAB NUCLEAR REACTOR WITH THERMAL FEEDBACK." Acta Polytechnica CTU Proceedings 4 (December 16, 2016): 62. http://dx.doi.org/10.14311/ap.2016.4.0062.

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The paper describes a new numerical code for multigroup transient analyses with thermal feedback. The code is developed at Institute of Nuclear and Physical Engineering. It is necessary to carefully investigate transient states of fast neutron reactors, due to recriticality issues after accident scenarios. The code solves numerical diffusion equation for 1D problem with possible neutron source incorporation. Crank-Nicholson numerical method is used for the transient states. The investigated cases are describing behavior of PWR fuel assembly inside of spent fuel pool and with the incorporated n

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