Relevant bibliographies by topics / BUCK (Computer program)

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'BUCK (Computer program)'

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Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "BUCK (Computer program)"

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KS, Rikza, and Rifdian Sudjoko. "Rancang Bangun Trainer Konverter berbasis Arduino Mega 2560 sebagai Sarana Praktikum di Laboratorium Listrik Politeknik Penerbangan Surabaya." Jurnal Penelitian 3, no. 2 (June 4, 2018): 66–77. http://dx.doi.org/10.46491/jp.v3e2.42.66-77.

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Salah satu mata kuliah Program Studi Diploma III Teknik Listrik Bandar Udara yaitu elektronika daya. Dalam mata kuliah tersebut terdapat materi tentang penyearah tegangan, buck konverter, boost konverter dan inverter yang biasa disebut sebagai konverter daya atau pengkonversian daya dari ac ke dc, ac ke ac, dc ke dc maupun dc ke ac yang sangat berguna sekali bagi manusia untuk memenuhi kebutuhan energi sehari-hari. Pada pengkonversian daya perlu kita ketahui pula bentuk gelombang dari input dan output dari suatu rangkaian konverter agar dapat kita ketahui perbedaan dari kedua gelombangnya agar tidak salah memilih rangkaian konverter mana yang tepat untuk menyuplai suatu beban. Sehingga tidak merusak komponen-komponen dari rangkaian konverter maupun beban yang akan disuplai. Pada konverter terdapat berbagai macam komponen – komponen elektronika yang memiliki sifat – sifat dan fungsi tertentu yang terintegrasi untuk menghasilkan konversi yang dibutuhkan. Sehingga pemahaman tentang komponen pada konverter perlu dimiliki dengan kontrol dan monitor bebasis mikrokontroler melalui Personal Computer.
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Williams, B., G. Flores-Foxworth, S. Chapman, J. Romano, B. Kidd, G. Fuchs, M. Westhusin, D. Kraemer, and D. Frels. "124CRYOPRESERVATION OF WHITE-TAILED DEER (ODOCOILEUS VIRGINIANUS) SEMEN." Reproduction, Fertility and Development 16, no. 2 (2004): 184. http://dx.doi.org/10.1071/rdv16n1ab124.

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The methods for collecting and freezing deer semen have been, for the most part, limited to two species; red deer ( Cervus elaphus) and fallow deer ( Dama dama) (Asher et al., 2000 Anim. Reprod. Sci. 62, 195–211). The object of this study was to evaluate the progressive motility and effects of a thermal stress test on white-tailed deer (WTD) semen frozen in Biladyl extender (Mini Tube, Verona, WI, USA). Semen was collected by electroejaculation from WTD bucks (n=7, ages 1.5–2.5 years) during the breeding season. This trial was the second collection for one buck (#0025) and the third collection for the other 6 bucks. The bucks were immobilized with a xylazine/ketamine mixture i.m. (2mgkg−1 Vedco, Inc., St. Joseph, MO, 2.2mgkg−1 ketamine HCl, Fort Dodge Animal Health, Fort Dodge, IA, USA) and electroejaculated with a Pulsator IV unit (Lane Manufacturing, Denver, Co). Semen was extended 1:1 with Biladyl A, and then slowly cooled to 4°C. Once cooled, semen was extended with equal amounts of Biladyl part A, then part B, to a final concentration of 160×106cells/mL. The extended semen was then loaded into 0.25-cc straws, placed over liquid nitrogen (LN2) in vapors (−80°C) for 10min, and then plunged into LN2. Straws were stored in a LN2 tank for 3 months. Semen was thawed in a 38.5°C water bath for 45s, then placed in a warm test tube and incubated at 38.5°C for 5min before progressive motility was evaluated using a computer program (Sperm Vision, Mini Tube). A thermal stress test was performed by incubating thawed samples at 38.5°C for 1h. Results of the stress test were graded as either passed (progressive motility ≥50%) or failed (progressive motility<50%). Results are shown in the table below. Our results show that the protocol described above is suitable for the cryopreservation of white-tailed deer semen. These data suggest that the initial post-thaw progressive motility may not accurately represent the potential progressive motility of the spermatozoa (e.g. WTD s 0038 & 0103). Table 1 Volume collected and post thaw evaluation of white-tailed deer semen
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Hopman, P. C. "VEROAD: A Viscoelastic Multilayer Computer Program." Transportation Research Record: Journal of the Transportation Research Board 1539, no. 1 (January 1996): 72–80. http://dx.doi.org/10.1177/0361198196153900110.

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The mathematical principles and derivation of a linear viscoelastic multilayer computer program are described. The principles of the derivation apply equally to conventional linear elastic programs. The practical consequences of the viscous material properties for the mathematical derivation have been solved by Fourier transformation; another mathematical consequence is that complex calculus was inevitable. The program is called VEROAD, (viscoelastic road analysis Delft). The program's primary extension is that the analyzed material can be vis-coelastic. Consequences of this extension are numerous: calculation from physical material properties of quantities such as time-dependent displacements, stresses and strains, permanent deformations, and dissipated energies is made possible. All these quantities depend on velocity of traffic, which is explicitly included in the calculations. The material model assumes the bulk modulus to be elastic and the shear modulus to be viscoelastic. The latter follows Burger's model. For illustrative purposes some mechanical analyses of asphaltic road structures are carried out, with emphasis on the distribution of stresses, strains, (permanent) deformations, and dissipated energies.
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Li, Lili, Sheng Ouyang, Yanqing Yang, and Ming Han. "EBSDL: a computer program for determining an unknown Bravais lattice using a single electron backscatter diffraction pattern." Journal of Applied Crystallography 47, no. 4 (July 19, 2014): 1466–68. http://dx.doi.org/10.1107/s160057671401382x.

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Electron backscatter diffraction (EBSD) patterns provide a wealth of crystallographic information but disappointingly low accuracy. Adopting a strategy of compensating the poor accuracy by the large amount of information, a computer program, EBSDL, has been successfully developed to determine the unknown Bravais lattice of bulk crystalline materials using a single EBSD pattern. Unlike programs that perform phase identification, the new application is completely independent of chemical information.
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Nicolau, Dan V., Florin Fulga, and Dan V. Nicolau. "The Protein Surface Properties Calculator." Asia-Pacific Biotech News 07, no. 03 (February 3, 2003): 116–22. http://dx.doi.org/10.1142/s0219030303000296.

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The interactions of large molecules with surfaces and with each other are strongly dependent upon their surface, rather than their bulk properties. In addition, the local properties of biomolecular surfaces are very important in their own right in biomedicine and other areas, for example for locating binding sites. Following to previous work, we have developed a program to compute to compute amino acid and atom-based surface descriptors, and used it to generate a small database of charge and hydrophobicity-related surface properties for a set of proteins. The program requires the user to input two text files: one assigning a real number to each atom of each amino acid, and one assigning a real number to each amino acid. Although we have so far only computed surface charge (atom-based) and surface hydrophobicity (amino acid-based), we note that this program could be used to compute any surface parameter whatsoever, since the user can assign arbitrary atom-by-atom and amino acid properties.We discuss possible applications of this program and describe one current application, the Biomolecular Adsorption Database.
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CHEN, YIFENG, and J. W. SANDERS. "TOP-DOWN DESIGN OF BULK-SYNCHRONOUS PARALLEL PROGRAMS." Parallel Processing Letters 13, no. 03 (September 2003): 389–400. http://dx.doi.org/10.1142/s0129626403001367.

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This paper studies top-down program development techniques for Bulk-Synchronous Parallelism. In that context a specification formalism LOGS, for 'the Logic of Global Synchrony', has been proposed for the specification and high-level development of BSP designs. This paper extends the use of LOGS to provide support for the protection of local variables in BSP programs, thus completing the link between specifications and programs.
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Zhu, Dong, Yuan-Zhong Hu, Herbert S. Cheng, Takayuki Arai, and Kyugo Hamai. "A Numerical Analysis for Piston Skirts in Mixed Lubrication: Part II—Deformation Considerations." Journal of Tribology 115, no. 1 (January 1, 1993): 125–33. http://dx.doi.org/10.1115/1.2920965.

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This paper presents a mathematical model for piston skirts in mixed lubrication. It takes into account the effects of surface waviness, roughness, piston skirt surface profile, bulk elastic deformation and thermal distortion of both piston skirts and cylinder bore on piston motion, lubrication and friction. The corresponding computer program developed can be used to calculate the entire piston trajectory and the hydrodynamic and contact friction forces as functions of crank angle under engine running conditions. Complete distributions of the oil film thickness and elastic deformation as well as the hydrodynamic and contact pressures can also be given at any crank angle if needed. This paper is the second part of a series of two papers. The first part (Basic Modeling), presented earlier by Zhu et al. (1991), gave the basic formulation and some preliminary results without bulk deformation considerations. In the present part, the three-dimensional finite element method is used to calculate so-called influence coefficient matrices. These matrices are repeatedly used to compute bulk elastic deformations of piston skirts. Results for 12 different cases are presented, and discussions are given focusing on the influences of elastic and thermal deformations on piston motion, lubrication and friction. An attempt to compare the calculated friction with experimental data is made, and agreement appears good for the two available cases. The computer program presented should be a useful tool for piston design and development.
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LOULERGUE, F. "DISTRIBUTED EVALUATION OF FUNCTIONAL BSP PROGRAMS." Parallel Processing Letters 11, no. 04 (December 2001): 423–37. http://dx.doi.org/10.1142/s0129626401000701.

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The BS λp-calculus is a calculus of functional bulk synchronous parallel (BSP) programs. It is the basis for the design of a bulk synchronous parallel ML language. For data-parallel languages, there are two points of view: the programming model where a program is seen as a sequence of operations on parallel vectors, and the execution model where the program is a parallel composition of programs run on each processor of the parallel machine. BSP algorithms are defined by data-parallel algorithms with explicit (physical) processes in order to allow their parallel execution time to be estimated. We present here a distributed evaluation minimally synchronous for BSP execution (which corresponds to the execution model). This distributed evaluation is correct w.r.t. the call-by-value strategy of the BS λp-calculus (which corresponds to the programming model).
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Paktunc, A. Dogan. "MODAN: an interactive computer program for estimating mineral quantities based on bulk composition." Computers & Geosciences 24, no. 5 (June 1998): 425–31. http://dx.doi.org/10.1016/s0098-3004(98)00018-1.

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Nikezic, Dragoslav, Jelena M. Stajic, and Kwan Ngok Yu. "Updates to TRACK_TEST and TRACK_VISION Computer Programs." Polymers 13, no. 4 (February 13, 2021): 560. http://dx.doi.org/10.3390/polym13040560.

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The computer programs TRACK_TEST and TRACK_VISION were previously developed to model profiles and optical appearances of tracks developed in solid-state nuclear track detectors. The programs were based on a track development model that involved the bulk etch rate Vb and the track etch rate Vt or the V function (i.e., Vt/Vb). The present work reported our work to update and modify these two programs. In the revised TRACK_TEST, two new V functions were added and enabled. Sample results for the CR-39 detector obtained using the three original and the two new V functions were compared. Discrepancies were within ~10% and <14% for incident alpha-particle energies of 1 MeV and >1 MeV, respectively. Another major revision of TRACK_TEST was to enable calculations for the Makrofol detector. In the revised TRACK_VISION, the two new V functions, as well as the option for the Makrofol detector, were also added. The experimental results on the Makrofol detectors were obtained (irradiated with 3.6-MeV alpha particles under normal incidence and then etched to achieve a removed detector thickness of 30 μm) for comparisons with the modeled results using the revised TRACK_VISION. The track diameters obtained from the experiment and model were 24.7 and 23.2 μm, respectively. Moreover, a bright area in the central parts, together with an outer dark ring, were present in both the simulated and experimental tracks. The track-opening diameters and the general optical appearances of the tracks were in good agreement.
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Dissertations / Theses on the topic "BUCK (Computer program)"

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Qadar, Muhammad Abdul. "The N-computer : a data-flow bulk synchronous machine for data parallel programs." Thesis, University of Surrey, 1995. http://epubs.surrey.ac.uk/843752/.

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There are two fundamental problems which a researcher in the field of general purpose parallel computing is facing. One is to develop a framework for portable and easy to write parallel applications. The other is to design a scalable parallel machine upon which the parallel applications can be executed efficiently and economically. To solve the first problem, a portable software platform (PSP) for data parallel high level languages like Fortran 90, F-code, has been developed by the members of the Computer Systems Research Group at the University of Surrey. F-code can be considered as a machine independent intermediate level representation of a data parallel program. This thesis addresses the second issue, i.e., the design of a scalable parallel machine, the N-computer, while critically examining and then refining the definition of F-code. F-code is considered as a problem domain for the N-computer. Two extremes of the design space for a parallel machine, i.e., the conventional von-Neumann and dataflow, are not suitable to implement a design of the machine according to the specifications developed. The conventional approach is unable to address the two major issues of a parallel machine, i.e., synchronization and latency, at the same time. When a solution to solve one problem is found, the other problem becomes worse. Evolution in the design of dataflow machines has solved the major problems facing those kinds of architectures, such as the implementation of a waiting/matching store and scheduling of macroactors instead of single instructions. By scheduling a macroactor which contains code for more than one instruction for which there is no remote communication, the need for explicit synchronization can be eliminated. However, the problem of token recycling and the need for the I-structure storage to access variables, which need a three state synchronizer for each of its operation, are still remained unsolved. Both are quite expensive in the modern dataflow machines. It is observed that the dataflow bulk synchronous machine (DFBSM) model can address these two problems. The N-computer is designed on top of the DFBSM model for data parallel languages. The implementation not only enjoys the benefits of DFBSM, but is also favoured with the regular structure which is normally available in a data parallel application. The design of the N-computer is described at system level. Each processing node is broken down into six major sub-systems. The logical organization of each sub-system and its functioning and the interaction with other sub-systems are discussed. The addition of certain features in the organization of these sub-systems is argued. Then the ways to execute each F-code function are discussed. In other words, this thesis presents the system level design and functioning of the N-computer for its complete operation cycle, and demonstrates the ways to execute an F-code program on an N-computer. A plan to build soft prototype of the N-computer system is presented. A major portion of the plan is implemented in software. A simulation of data distribution strategies is also implemented and presented. Due to different communication patterns in programs, it is not possible to statically fix the distribution strategy for optimal execution of all the programs. Different programs may need to be distributed in different ways. By simulating different distribution strategies for a given program, an optimum way to distribute objects can be selected. The N-computer is capable of dynamically adopting a distribution strategy for each activity in an activity tree depending upon the information available in the activity. An important phase for the design of the N-computer was a thorough understanding of the problem domain, i.e., F-code. For that purpose, an F-code interpreter, F-SIM, was implemented in C. The implementation of F-SIM is described. F-code is also examined as a PSP for data parallel high level languages and compared with other potential PSPs. A PSP must preserve certain features available in a data parallel application to preserve the efficiency of an implementation. Although, F-code preserves most of them, there is a need to preserve primitive type sizes. To see whether F-code semantics are powerful enough to compile data parallel high level languages, like Fortran 90, the definition of F-code is examined qualitatively. In the light of this study, a modified definition of F-code functions is suggested.
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Books on the topic "BUCK (Computer program)"

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Olsen, Eldon D. Optimal bucking: Two trials with commercial OSU BUCK Software. [Corvallis, Or.]: Forest Research Laboratory, College of Forestry, Oregon State University, 1997.

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Sauer. Das grosse LOGO Buch zum Atari ST. Düsseldorf: Data Becker, 1986.

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James P. Smith - undifferentiated. Bucky instruction manual. 3rd ed. [Washington, DC]: National Aeronautics and Space Administration, 1994.

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James P. Smith - undifferentiated. Proof test of the computer program BUCKY for plasticity problems. Houston, Texas: Lyndon B. Johnson Space Center, 1994.

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Schreffler, Curtis L. Water-use analysis program for the Neshaminy Creek Basin, Bucks and Montgomery counties, Pennsylvania. Lemoyne, Pa: U.S. Dept. of the Interior, U.S. Geological Survey, 1996.

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Schreffler, Curtis L. Water-use analysis program for the Neshaminy Creek Basin, Bucks and Montgomery counties, Pennsylvania. Lemoyne, Pa: U.S. Dept. of the Interior, U.S. Geological Survey, 1996.

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L, Schreffler Curtis. Water-use analysis program for the Neshaminy Creek Basin, Bucks and Montgomery counties, Pennsylvania. Lemoyne, Pa: U.S. Dept. of the Interior, U.S. Geological Survey, 1996.

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Schreffler, Curtis L. Water-use analysis program for the Neshaminy Creek Basin, Bucks and Montgomery counties, Pennsylvania. Lemoyne, Pa: U.S. Dept. of the Interior, U.S. Geological Survey, 1996.

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L, Schreffler Curtis. Water-use analysis program for the Neshaminy Creek Basin, Bucks and Montgomery counties, Pennsylvania. Lemoyne, Pa: U.S. Dept. of the Interior, U.S. Geological Survey, 1996.

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L, Schreffler Curtis. Water-use analysis program for the Neshaminy Creek Basin, Bucks and Montgomery counties, Pennsylvania. Lemoyne, Pa: U.S. Dept. of the Interior, U.S. Geological Survey, 1996.

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Book chapters on the topic "BUCK (Computer program)"

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Bisseling, Rob H. "Introduction." In Parallel Scientific Computation, 1–73. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198788348.003.0001.

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This chapter is a self-contained tutorial which tells you how to get started with parallel programming and how to design and implement parallel algorithms in a structured way using supersteps. It introduces a simple target architecture for designing parallel algorithms, the bulk synchronous parallel (BSP) computer. Using the computation of the inner product of two vectors as an example, the chapter shows how an algorithm is designed, hand in hand with its cost analysis. The inner-product algorithm is implemented in a short program that demonstrates the most important primitives of the communication library, BSPlib. Furthermore, a benchmarking program is given for measuring the BSP parameters of a parallel computer. Its use is demonstrated on a desktop computer and a supercomputer. Finally, a parallel regular sampling sort algorithm is presented, implemented, and tested.
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"Analysis and Simulation." In Computer-Mediated Briefing for Architects, 287–301. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-4647-6.ch010.

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In the previous three chapters the author has considered direct connections between the brief and the design representation, between discrete items in the brief, such as requirements or constraints, and attributes of entities or relationships between entities in the design. Such connections cover the bulk of the brief but leave out important questions that concern overall performance and relate to general, frequently abstract goals in the brief like sustainability. To tackle such questions, one must often analyse the design as a whole: predict its behaviour and performance and compare it to what the brief and legal or professional requirements specify. Computerization offers a wide range of possibilities for performing such extensive and demanding tasks automatically. In this chapter a few examples of computerized design analysis both within the programs that have been used so far and in external software are discussed. These analyses are primarily performed through simulations that promise the accuracy, reliability, and transparency required to achieve and safeguard the brief goals.
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Fedkin, Valentin V., Theodore D. Burlick, Mary L. Leech, Andrey A. Shchipansky, Peter M. Valizer, and W. G. Ernst. "Petrotectonic origin of mafic eclogites from the Maksyutov subduction complex, south Ural Mountains, Russia." In Plate Tectonics, Ophiolites, and Societal Significance of Geology: A Celebration of the Career of Eldridge Moores. Geological Society of America, 2021. http://dx.doi.org/10.1130/2021.2552(09).

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ABSTRACT The Maksyutov complex is a mid- to late-Paleozoic high- to ultrahigh-pressure (HP-UHP) eclogite-bearing subduction zone terrane in the south Ural Mountains. Previous reports of radial fractures emanating from quartz inclusions in garnet, omphacite, and glaucophane, cuboid graphite pseudomorphs after matrix diamond, and microdiamond aggregates preserved in garnet identified by Raman spectroscopy indicate that parts of the complex were subjected to physical conditions of ∼600 °C and &gt;2.8 GPa for coesite-bearing rocks, and &gt;3.2 GPa for diamond-bearing rocks. Peak UHP eclogite-facies metamorphism took place at ca. 385 Ma, and rocks were exhumed through retrograde blueschist-facies conditions by ca. 360 Ma. Bulk analyses of 18 rocks reflect the presence of mid-oceanic-ridge basalt (MORB), oceanic-island basalt (OIB), and island-arc tholeiite (IAT) basaltic and andesitic series plus their metasomatized equivalents. To more fully constrain the petrotectonic evolution of the complex, we computed isochemical phase equilibria models for representative metabasites in the system Na2O-CaO-K2O-FeO-MgO-Al2O3-SiO2-H2O-TiO2 based on our new bulk-rock X-ray fluorescence (XRF) data. Both conventional Fe-Mg exchange thermometry and phase equilibrium modeling result in higher peak equilibrium temperatures than were previously reported for the complex. Pseudosection analysis provides minimum P-T conditions of 650–675 °C and 2.4–2.6 GPa for peak assemblages of the least retrogressed Maksyutov eclogites, whereas Fe-Mg exchange thermometry yields temperatures of 750 ± 25 °C for a pressure of 2.5 GPa. We interpret our new P-T data to reflect a thermal maximum reached by the eclogites on their initial decompression-exhumation stage, that defines a metamorphic field gradient; the relict coesite and microdiamond aggregates previously reported testify to pressure maxima that define an earlier prograde subduction zone gradient. The eclogitic Maksyutov complex marks underflow of the paleo-Asian oceanic plate and does not represent subduction of the Siberian cratonal margin.
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Conference papers on the topic "BUCK (Computer program)"

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Wang, Nanxin, Vijitha Kiridena, Gianna Gomez-Levi, Jian Wan, Steven Sieczka, and David Pulliam. "Design and Verification of a New Computer Controlled Seating Buck." In ASME 2006 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/detc2006-99393.

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Appraising vehicle package design concepts using seating bucks — physical prototypes representing vehicle package, is an integral part of the vehicle package design process. Building such bucks is costly and may impose substantial burden on the vehicle design cycle time. Further, static seating bucks lack the flexibility to accommodate design iterations during the gradual progression of a vehicle program. A “Computer controlled seating buck”, as described in this paper, is a quick and inexpensive alternative to the traditional seating bucks with the desired degree of fidelity. It is particularly useful to perform package and ergonomic studies in the early stages of a vehicle program, long before the data is available to build a traditional seating buck. Such a seating buck has been developed to accommodate Ford vehicle package design needs. This paper presents the functional requirements, the high level conceptual design of how these requirements are realized, and the methods to verify, improve and sustain the dimensional accuracy and capability of the new computer controlled seating buck.
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Kilkis, Birol, and S. Selçuk Sager. "Computer Aided Design of Bucket Type Elevators and Belt Conveyors." In ASME 1992 International Computers in Engineering Conference and Exposition. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/cie1992-0020.

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Abstract One of the most effective transportation systems especially for bulk materials is continuous conveyors. They enable to transport materials quickly, economically and with rather simple means of handling. On the other hand for transportation needs involving steep grades and elevations, bucket type elevators are suitable especially for granular materials. In this study a computer program has been developed in order to provide a computer aided design tool for both bucket type elevators and belt conveyors. Operation of the program is interactive. Thus, some critical decisions during the design can be made by the designer, himself. The program has been written in BASIC programming language for Macintosh Plus personal computers. It can be also used in Macintosh II computers. The computer program standardizes all design results and the design conforms the relevant TSE, DIN and ISO standards. All standard tables used in the program, are available in the database. The database can be easily edited and updated. A design report can also be obtained at the end of the design as well as the screen output of the design session.
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Cheng, Wing L. "Bulk Forming Simulation on High Performance Computers." In ASME 1994 International Computers in Engineering Conference and Exhibition and the ASME 1994 8th Annual Database Symposium collocated with the ASME 1994 Design Technical Conferences. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/cie1994-0452.

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Abstract Modeling of complicated three-dimensional bulk forming processes remains a challenge to scientists and engineers. Not only does it require a good mathematical model which gives an accurate geometric representation of the dies and the work-piece to capture the physics of the forming processes, it also needs the appropriate computers to carry out different parts of the modeling effort including the numerical simulation. This paper describes our experience on a computer analysis of a three-dimensional multi-stage forging process using an explicit finite element program and a combination of graphic workstations and supercomputers. A three-stage forging of a valve body was used to illustrate the simulation process. A Scalar Graphic Workstation was used in geometric modeling, numerical calculations for the first two stages of the forging process when a coarse model was adequate, and post-processing of the results. A CRAY Y-MP Supercomputer was required to simulate the third stage of the forging process when a fine mesh was needed to capture the details of the material flows. Data transfer was accommodated by a full T-1 communication line between the supercomputer and the workstation. The availability of the advanced software tools and these computer resources provides us the ability to model an entire range of bulk forming problems.
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Cuiffi, Joseph, Travis Benanti, Wook Jun Nam, and Stephen Fonash. "Application of the AMPS computer program to organic bulk heterojunction solar cells." In 2009 34th IEEE Photovoltaic Specialists Conference (PVSC). IEEE, 2009. http://dx.doi.org/10.1109/pvsc.2009.5411361.

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Wang, Nanxin, Jian Wan, and Gianna Gomez-Levi. "A Parametric Approach to Vehicle Seating Buck Design." In ASME 2004 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/detc2004-57212.

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Vehicle package development is an important part of the entire vehicle design. It consists of determining the occupant’s spatial environment, the vehicle’s mechanical spatial configuration and the overall exterior/interior dimensions while meeting the engineering requirements, including packaging, structure, manufacturing, etc. Developing and verifying the occupant compartment configuration is usually conducted by using a seating buck. To build a seating buck, vehicle interior surfaces are generated in CAD using vehicle exterior surfaces, package layouts and master sections. During early program stages, this information is scattered, incomplete and constantly changing, which makes the seating buck creation challenging and the package design decision-making more difficult. A new method has been developed to quickly generate the seating buck surfaces from scattered information. It has shown to significantly reduce the time conventionally required for the seating buck surface modeling. This paper documents the method and process and summarizes the potential of the method and its impact on vehicle package design.
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Hirano, Toshio, Zenglin Guo, and R. Gordon Kirk. "Application of CFD Analysis for Rotating Machinery: Part 2 — Labyrinth Seal Analysis." In ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/gt2003-38984.

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Labyrinth seals are used in various kinds of turbo machines to reduce internal leakage flow. The working fluid or, the gas passing through the rotor shaft labyrinth seals, often generates driving force components that may increase the unstable vibration of the rotor. It is important to know the accurate rotordynamic force components for predicting the instability of the rotor-bearing-seal system. The major goals of this research was to calculate the rotordynamic force of a labyrinth seals utilizing a commercial CFD program and to further compare those results to an existing bulk flow computer program currently used by major US machinery manufacturers. The labyrinth seals of a steam turbine and a compressor eye seal are taken as objects of analysis. For each case, a 3D model with eccentric rotor was solved to obtain the rotordynamic force components. The leakage flow and rotor dynamics force predicted by CFX TASCFlow are compared with the results the existing bulk flow analysis program DYNLAB. The results show that the bulk flow program gives a pessimistic prediction of the destabilizing forces for the conditions under investigation. Further research work will be required to fully understand the complex leakage flows in turbo machinery.
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7

Rojas, Eileen, C. P. Chen, and Alok Majumdar. "Microfluidic System Simulation Including the Electro-Viscous Effect." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21295.

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This paper describes a practical approach using a general purpose lumped-parameter computer program, GFSSP (Generalized Fluid System Simulation Program) for calculating flow distribution in a network of micro-channels including electro-viscous effects due to the existence of electrical double layer (EDL). In this study, an empirical formulation for calculating an effective viscosity of ionic solutions based on dimensional analysis is described to account for surface charge and bulk fluid conductivity, which give rise to electro-viscous effect in microfluidics network. Two dimensional slit micro flow data was used to determine the model coefficients. Geometry effect is then included through a Poiseuille number correlation in GFSSP. The bi-power model was used to calculate flow distribution of isotropically etched straight channel and T-junction microflows involving ionic solutions. Performance of the proposed model is assessed against experimental test data.
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He, Haiping, Armin W. Troesch, Yung Sup Shin, and Boo-Ki Kim. "Springing Analysis of Elastic Vessels in Head and Oblique Seas Including Nonlinear Effects Due to Second Order Diffraction Pressures." In ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/omae2004-51518.

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The wave-induced vibration of the ship hull, commonly called springing, may not produce extreme stresses, but it is likely to have a direct effect on fatigue-life estimates due to its high frequency content. This research investigates the second order contribution to the springing bending moment from the sum frequency of incident ocean waves in both head and oblique seas. The computer program developed here extends the ABS SSRS (Ship Spring Response System) program to oblique seas using Troesch’s oblique sea linear diffraction theory [1]. The theoretical calculations for forward speed are modified by an empirical factor to correlate more closely with experimental results. An example calculation on a Bulk Carrier was performed for different heading angles. For one such representative sea state, the overall increase to the total bending moment from the nonlinear, sum-frequency excitation is found to be less than 12%. However, the nonlinear springing (RMS) increases the total RMS springing over the linear springing by more than 5 times in some stations, which has significant implications for fatigue studies. A sea state sweep study (using ITTC spectrum) also shows the springing effects are highly sea state dependent. Overall, springing effects decrease as zero crossing periods increase, which indicates springing is important in sea states with short waves and becomes less significant in sea states with long waves.
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Johnson, Andrew C., Jeffrey Miles, Laurent Mosse, Robert Laronga, Violeta Lujan, Niranjan Aryal, and Dozie Nwosu. "INTEGRATING A NOVEL CHLORINE MEASUREMENT WITH RESISTIVITY, DIELECTRIC DISPERSION, AND 2D NMR TO RESOLVE SALINITY AMBIGUITY: CASE STUDIES IN ORGANIC SHALE FORMATIONS." In 2021 SPWLA 62nd Annual Logging Symposium Online. Society of Petrophysicists and Well Log Analysts, 2021. http://dx.doi.org/10.30632/spwla-2021-0077.

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Formation water saturation is a critical target property for any comprehensive well log analysis program. Most techniques for computing saturation depend heavily on an analyst’s ability to accurately model resistivity measurements for the effects of formation water resistivity and rock texture. However, the pre-requisite knowledge of formation water properties, particularly salinity, is often either unknown, varying with depth or lateral extent, or is difficult to derive from traditional methods. A high degree of variability may be present due to fluid migration from production, water injection, or various geological mechanisms. In unconventional reservoirs, the complexity of the rocks and pore structure further complicates traditional interpretation of the available well logs. These factors introduce significant uncertainties in the computed fluid saturations and therefore can substantially affect final reserves estimates. A novel technique in geochemical spectroscopy has recently been introduced to distinguish the chlorine signals of the formation and borehole. The new, quantitative measurement of formation chlorine enables a direct calculation of bulk water volume for a given formation water salinity. When integrated into a multi-physics log analysis workflow, the chlorine-derived water volume can provide critical information on fluid saturations, hydrocarbon-in-place, and producibility indicators. This additional information is especially useful for characterizing challenging and complex unconventional reservoirs. We present the new technique through several full petrophysical evaluation case studies in organic shale formations across the U.S., including the Midland, Delaware, Marcellus, and DJ basins. We solve for formation-specific water salinity and bulk water volume through an optimization that combines chlorine concentration with resistivity and dielectric measurements. These outputs are integrated into comprehensive petrophysical evaluations, leveraging a suite of advanced well log measurements to compute final fluid and rock properties and volumetrics. The evaluations include geochemical mineralogy logs, 2D NMR analyses, dielectric dispersion analyses, basic log measurements, and multi-mineral models. The results underscore the utility of the new spectroscopy chlorine log to reduce petrophysical model uncertainties in an integrated workflow. While this workflow has been demonstrated here in several U.S. organic shale case studies, the fundamental challenges it addresses will make it a valuable solution for a range of unconventional reservoirs globally.
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Bulancea, D., V. Bulancea, I. Alexandru, and D. Condurache. "The Optimizing of the Superficial Cold-Burst Hardening Process of the Inner Cylindrical Metallic Surfaces by Knocking with Centrifuged Balls." In ITSC 2000, edited by Christopher C. Berndt. ASM International, 2000. http://dx.doi.org/10.31399/asm.cp.itsc2000p0957.

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Abstract The metallic interior surfaces with cylindrical symmetry have been processed by knocking them with centrifuged balls. The first author has designed the used processing tool and it has been carried out under his instructions. There have been processed cast iron and carbon steel samples, using 80 different combinations for the process parameters: axial advance S, tangential rotation speed of the processed piece V, and the impact force F between the balls and the processed surface. Using the measured values of roughness Ra, Vickers microhardness HV and of the depths of cold-hardening h, we have achieved and used an optimizing computer program for the qualitative parameters of the cold-hardening process, i.e. Ra, HV and h. Also, we found optimal solutions for the processing regime. The study establishes the ability to increase the mechanical characteristics of the turned out metallic surfaces, thus taking out any further mechanical, thermal and/or chemical superficial processing. The results of the current study allow a correct choice of the processing regimes for different materials with similar bulk properties.
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