Thematische Bibliographien / Seconds method

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Auswahl der wissenschaftlichen Literatur zum Thema „Seconds method“

Autor: Grafiati

Veröffentlicht am 30. Juni 2021

Zuletzt aktualisiert am 8. Februar 2022

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Zeitschriftenartikel zum Thema "Seconds method"

Hirai, Takayuki, Toru Kawai, Yoshiki Takagi, Osamu Shimizu, Yoshihisa Suda, Yoshinori Kanno, Kiyoshi Kuribayashi und Tsuyosi Hayashi. „Diamond particles synthesized with graphite spark method in two seconds“. Superlattices and Microstructures 40, Nr. 4-6 (Oktober 2006): 526–29. http://dx.doi.org/10.1016/j.spmi.2006.09.027.

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Juniana, Paula, und Lukman Hakim. „TRAFFIC LIGHT CONTROL USING FUZZY LOGIC MAMDANI METHOD“. Jurnal Terapan Teknologi Informasi 3, Nr. 1 (27.06.2019): 1–10. http://dx.doi.org/10.21460/jutei.2019.31.126.

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Traffic congestion is a common occurrence in Indonesia. Traffic congestion is increasing from year to year, causing many things to happen, such as longer travel time, increased transportation costs, serious disruptions to transporting products, decreasing levels of work productivity, and wasteful use of labor energy. Congestion is also caused by a traffic light control system that is made with a fixed time so it can not detect the density of certain paths. Traffic lights in Indonesia, frequent damage that makes the density and the flow of his road vehicles can not be controlled. From these problems, conducted research to reduce the density of vehicles using infrared sensors and see the waiting time of the vehicle when the red light. The traffic light control system will use Fuzzy Logic Mamdani method. In Mamdani method by applying fuzzy into each variable and will be done matching between rule with condition which fulfilled to determine contents of output to be executed by prototype. This congestion detection will help the system in controlling the green light time by looking at stable, medium, and traffic jams. When the bottleneck starts to detect, the prototype will add a green light time according to the condition that is 0 seconds, 5 seconds, 10 seconds, and 15 seconds. However, when the streets are not detected by traffic jams, the green light will be back to normal at 15 seconds without additional time

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Mazzei, Francesco Giuseppe, Luca Volterrani, Susanna Guerrini, Nevada Cioffi Squitieri, Eleonora Sani, Gloria Bettini, Chiara Pozzessere und Maria Antonietta Mazzei. „Reduced Time CT Perfusion Acquisitions Are Sufficient to Measure the Permeability Surface Area Product with a Deconvolution Method“. BioMed Research International 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/573268.

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Objective. To reduce the radiation dose, reduced time CT perfusion (CTp) acquisitions are tested to measure permeability surface (PS) with a deconvolution method. Methods and Materials. PS was calculated with repeated measurements (n=305) while truncating the time density curve (TDC) at different time values in 14 CTp studies using CTp 4D software (GE Healthcare, Milwaukee, WI, US). The median acquisition time of CTp studies was 59.35 sec (range 49–92 seconds). To verify the accuracy of the deconvolution algorithm, a variation of the truncated PS within the error measurements was searched, that is, within 3 standard deviations from the mean nominal error provided by the software. The test was also performed for all the remaining CTp parameters measured. Results. PS maximum variability happened within 25 seconds. The PS became constant after 40 seconds for the majority of the active tumors (10/11), while for necrotic tissues it was consistent within 1% after 50 seconds. A consistent result lasted for all the observed CTp parameters, as expected from their analytical dependance. Conclusion. 40-second acquisition time could be an optimal compromise to obtain an accurate measurement of the PS and a reasonable dose exposure with a deconvolution method.

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Tavares, Lucas do Nascimento, Karla Zancope, Frederick Khalil Karam, Wilson Mestriner Júnior und Flávio Domingues das Neves. „Influence of dentistry procedures on masticatory function of dentate patients“. Brazilian Journal of Oral Sciences 15, Nr. 3 (11.08.2017): 181. http://dx.doi.org/10.20396/bjos.v15i3.8649603.

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Aim: Evaluate the masticatory performance in patients with different clinical situations: patients with natural dentition without restorative and/or orthodontic intervention (Group CG) and patients with restorations and/or orthodontic intervention (Group TG). Subjects received instruction before the experiment, related to masticatory movements. Methods: Three capsules containing the granules were delivered separately to chew for 20 seconds each, controlled by the examiner. One capsule was chewed for 20 seconds only on the left side; the second capsule was chewed for 20 seconds only on the right side; and the third capsule was chewed for 20 seconds to simulate each patient’s mastication. The mean data and standard deviation of masticatory function of each patient was calculated. Results: The results obtained in this study showed that there were no statistically significant differences (P < 0.05) between both tested groups (0.0320 ± 0.00716, 0.0436 ± 0.00974). Conclusions: Patients who were submitted to orthodontic and/or restorative procedures, with balanced occlusion could be used as a control group, making easier the patient recruitment. Clinicians and researchers on masticatory performance evaluation could apply the colorimetric method. The colorimetric method was a standardize method, effective and easy to execute.

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Ginola, Ali Basrah Pulungan, Wawan Purwanto und Ichwan Yelfianhar. „Simulation of Brushless DC Motor Speed Control with Fuzzy Logic Method“. Jurnal Inotera 5, Nr. 2 (09.10.2020): 139–45. http://dx.doi.org/10.31572/inotera.vol5.iss2.2020.id125.

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Brushless DC Motor is used frequently in industrial applications, because this type of motor has high efficiency and does not cause sparks. However, the speed control of this motor generally has a slow response to the set point and the speed is not constant when given different loads. Therefore, it is essential to design sophisticated speed control system for this motor to improve the constant speed and speed response. In this paper, fuzzy logic method for speed control system is used to give the decision of how much voltage will be added to the motor to get to the desired speed set point value, and how much voltage will be reduced if the speed of the motor passes through the speed set point. brushless dc motor speed is set with input voltage to the motor taking into account speed error and delta speed error using Fuzzy Logic, so that when the speed of the motor almost reaches the set point the input voltage to the motor is reduced so as not to overshoot until the speed of the motor reaches the set point. The results of this study gave a better response than not using fuzzy logic methods. Where at set point 270 gets response time to set point (Tr) faster 0.0002 seconds from 0.0046 seconds to 0.0044, the time to steady state (Ts) is faster 0.025 seconds from 0.04 seconds to 0.015 seconds, the maximum pass percentage (Mp) is reduced from 75% to 20%, and error speed from 1.5% to 0%. And for a trial load at t=0.025 seconds in set point 270 with a load of 4Nm responds to the set point back for 0.014 seconds.

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Aryanto, Christ Billy. „DO YOU REMEMBER THE WORDS? DUAL-CODING METHOD ON LONG-TERM MEMORY“. Jurnal Psikologi 19, Nr. 4 (19.09.2020): 314–22. http://dx.doi.org/10.14710/jp.19.4.314-322.

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For students, long-term memory is required for individuals to study at various levels of education. An effective method is needed to help student to remember. This study aims to determine the dual-coding method on long-term memory in two levels of education: primary school and university. The first study was conducted on 60 primary school students and the second study was conducted on 81 university students, each divided into experimental group and control group. The two groups were shown 10 concrete nouns with the experimental group displayed along with the picture and only the word for the control group. Each word was displayed for 3 seconds. The results showed that the experimental group remembered more words in the first study, t(58) = 4.386, p < .05; and the control group remembered more words in the second study, t(79) = -3.036, p < .05. Therefore, the dual-coding method affects the long-term memory of primary school students but not on university students.

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Prihantini, Albert Hosea Santoso und Hanifa Reygina Fajrin. „Application of Webster's Method to Optimizing Traffic Lights at the Intersection of Bantul - Nasional III Street, Yogyakarta“. Proceeding International Conference on Science and Engineering 3 (30.04.2020): 347–52. http://dx.doi.org/10.14421/icse.v3.526.

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Indonesia is a developing country with the fourth largest population in the world. Population in one of the provinces in Indonesia, namely Yogyakarta Special Region. Based on data from the Badan Pusat Statistik (BPS), the Special Region of Yogyakarta reached 3.8 million people in 2018. Of this number, almost one third (1.2 million people) are residents of Sleman. While the region with the next largest population is Bantul with 1 million inhabitants. Increasing population causes the need to move and other needs, as well as activities in the education, office and trade sectors also increase. This increase will also affect transportation by increasing the number of vehicles, but this increase is not in line with the existing traffic light updates. As a result, the capacity of the street section has decreased and caused congestion, for example at the APILL intersection on Bantul-Nasional III Street, Yogyakarta. This shows that the existing traffic light settings are not optimal. Therefore, it is necessary to evaluate the duration of the traffic lights to minimize congestion. This research was conducted to analyze the traffic light system at the APILL intersection on Bantul-Nasional III Street, Yogyakarta using the Webster method. The results of calculations using this method obtained results for the Bantul Street (north), the duration of the green light 30 seconds, yellow 3 seconds and red 28 seconds. For Nasional III Street (East), the duration of the green light is 24 seconds, yellow is 3 seconds and red is 34 seconds. For Bantul Street (south), the duration of the green light is 30 seconds, yellow is 3 seconds and red is 28 seconds. For Nasional III Street (West), the duration of the green light is 24 seconds, yellow is 3 seconds and red is 34 seconds. These results look more optimal than those on the field today.

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Wang, Chengwei, Weiwei Ping, Qiang Bai, Huachen Cui, Ryan Hensleigh, Ruiliu Wang, Alexandra H. Brozena et al. „A general method to synthesize and sinter bulk ceramics in seconds“. Science 368, Nr. 6490 (30.04.2020): 521–26. http://dx.doi.org/10.1126/science.aaz7681.

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Ceramics are an important class of materials with widespread applications because of their high thermal, mechanical, and chemical stability. Computational predictions based on first principles methods can be a valuable tool in accelerating materials discovery to develop improved ceramics. It is essential to experimentally confirm the material properties of such predictions. However, materials screening rates are limited by the long processing times and the poor compositional control from volatile element loss in conventional ceramic sintering techniques. To overcome these limitations, we developed an ultrafast high-temperature sintering (UHS) process for the fabrication of ceramic materials by radiative heating under an inert atmosphere. We provide several examples of the UHS process to demonstrate its potential utility and applications, including advancements in solid-state electrolytes, multicomponent structures, and high-throughput materials screening.

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Pournasrollah, Alireza, Ramin Negahdari, Vahedeh Gharekhani, Ali Torab und Soheil Jannati Ataei. „Investigating the effect of abutment–implant connection type on abutment screw loosening in a dental implant system using finite element method“. Journal of Dental Research, Dental Clinics, Dental Prospects 13, Nr. 4 (23.12.2019): 289–97. http://dx.doi.org/10.15171/joddd.2019.044.

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Background. The most common problem associated with dental implants is the abutment screw loosening. This research aimed to investigate the effect of the type of connection on screw loosening, using a finite element method (FEM). Methods. Periosave system and different types of the implant–abutment connection were used for modeling. After being measured, CAD files were modeled using CATIA software and imported to the ANSYS analysis software, and the model was loaded. Results. A force of 100 N was applied at 0.1 second, and no force was applied at 0.42 second. The screw head deformation at 0.1 and 0.42 seconds was 8 and 3.8 μm, and 7.6 and 2.8 μm at morse taper and octagon dental implant connections, respectively. The displacement rate of the internal surface of the abutment at 0.1 and 0.42 seconds was 10.7 and 8.4 μm, and 5.7 and 5.6 µm in the octagon and morse taper dental implant connections, respectively. The displacement of the implant suprastructure–abutment interface from the screw head at 0.1 and 0.42 seconds was 9 and 7 μm, and 7 and 6 μm in the morse taper and octagon dental implant connections, respectively. At intervals of 0 to 0.1 seconds and 0.6 to 0.8 seconds, the octagon connection was separated at the maximum screw head displacement and the internal part of the abutment, but the morse taper connection did not exhibit any separation. In the above time intervals, the results were similar to the maximum state in case of the minimum displacement of the screw head and the internal part of the abutment. Conclusion. Screw loosening is less likely to occur in the morse hex connection compared to the octagon connection due to the lack of separation of the screw from the internal surface of the abutment.

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Dissertationen zum Thema "Seconds method"

Badahmane, Achraf. „Méthodes de sous espaces de Krylov préconditionnées pour les problèmes de point-selle avec plusieurs seconds membres“. Thesis, Littoral, 2019. http://www.theses.fr/2019DUNK0543.

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La résolution numérique des problèmes de point-selle a eu une attention particulière ces dernières années. À titre d'exemple, la mécanique des fluides et solides conduit souvent à des problèmes de point-selle. Ces problèmes se présentent généralement par des équations aux dérivées partielles que nous linéarisons et discrétisons. Le problème linéaire obtenu est souvent mal conditionné. Le résoudre par des méthodes itératives standard n'est donc pas approprié. En plus, lorsque la taille du problème est grande, il est nécessaire de procéder par des méthodes de projections. Nous nous intéressons dans ce sujet de thèse à développer des méthodes numériques robustes et efficaces de résolution numérique de problèmes de point-selle. Nous appliquons les méthodes de Krylov avec des techniques de préconditionnement bien adaptées à la résolution de problème de point selle. L'efficacité de ces méthodes dans les tests numériques
In these last years there has been a surge of interest in saddle point problems. For example, the mechanics of fluids and solids often lead to saddle point problems. These problems are usually presented by partial differential equations that we linearize and discretize. The linear problem obtained is often ill-conditioned. Solving it by standard iterative methods is not appropriate. In addition, when the size of the problem is large, it is necessary to use the projection methods. We are interested in this thesis topic to develop an efficient numerical methods for solving saddle point problems. We apply the Krylov subspace methods incorporated with suitable preconditioners for solving these types of problems. The effectiveness of these methods is illustrated by the numerical experiments

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Ekman, Filip, und Malin Molander. „Utvärdering av GNSS-baserade fri stationsetableringsmetoder : En jämförelse av realtidsuppdaterad fri station och 180-sekundersmetoden“. Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-84934.

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Behovet av mätning med totalstation har inom många områden minskat till förmån för mätning med GNSS-baserad teknik som ett resultat av dess större flexibilitet och ofta acceptabla osäkerhet. GNSS-baserad mätning kan dock begränsas av olika faktorer, vilket skapar ett behov av mätning med totalstation. Etablering av totalstation sker traditionellt genom kända punkter, men när dessa inte finns tillgängliga behövs andra metoder för etablering som ger en låg osäkerhet. Syftet med denna studie är att undersöka två GNSS-baserade fri stationsetablerings-metoder. Realtidsuppdaterad fri station (RUFRIS) bygger på kombinerad mätning, där koordinaterna för minst 15 bakåtobjekt mäts in med NRTK samtidigt som totalstationen mäter längd och riktning mellan station och bakåtobjekt. 180-sekundersmetoden bygger på kontinuerlig mätning i tre minuter på minst tre punkter, för att sedan använda dessa punkter som bakåtobjekt under fri stationsetablering. Under tre dagar insamlades mätdata från totalt 60 etableringar i Skålsjön i Ovanåkers kommun. Totalt 30 etableringar per metod utfördes växlande med varandra för att få samma tidspåverkan för mätningarna. Platsen valdes till följd av en närliggande stompunkt av hög kvalitet samt en realistisk mätningsmiljö. Insamlade data bearbetades och beräknades med avseende på spridning och mätosäkerhet. Dessutom utfördes en tidsanalys av erhållna mätdata. Den enskilda standardosäkerheten för RUFRIS beräknades vara 6,7 mm i plan och 15 mm i höjd. För 180-sekundersmetoden beräknades standardsosäkerheten till 10 mm i plan och 7,2 mm i höjd. Enligt den lägeskontroll som utfördes i studien var det endast RUFRIS som klarade den beräknade toleransen i plan. I höjd var det enbart 180-sekundersmetoden som befann sig inom toleransen. RUFRIS klarade dock toleransen när samtliga grova fel uteslöts från beräkningen. Slutsatsen som drogs i denna studie var att RUFRIS lämpar sig väl för mätnings-situationer med fokus på plan i områden med god sikt. 180-sekundersmetoden lämpar sig däremot bättre till höjdmätning och kan potentiellt vara ett alternativ till avvägning när toleransen i höjd är inom 10 mm. Mätningarna utfördes under goda förhållanden med avseende på jonosfären, därav antogs upplevda störningar gällande erhållandet av fixlösning och mätvärden inte härstamma från denna felkälla. Mätosäkerheten ökade i samband med kraftigt snöfall, vilket tyder på att vädret påverkade resultatet. Sammanfattningsvis har båda metoderna sina styrkor och svagheter, men ingen av metoderna visade sig vara mer lämplig än den andra när etableringen avser mätning i både plan och höjd.
The purpose of this study is to investigate two GNSS-based methods of establishing a free total station. Due to technological advances made within GNSS-based measuring, the total station is seeing less use by surveyors in the field. Despite this, there are situations where GNSS-receivers might struggle and the need to use a total station arises. In these situations, there needs to be a reliable method of establishing the total station without known points and with a low uncertainty. This can be accomplished by utilizing real time updated free station (RUFRIS) and the 180-seconds method. Both RUFRIS and the 180-seconds method is frequently used by municipalities and companies, which raises the question about which of these methods performs better. To answer this, a comparison is made between these two methods regarding their uncertainty, their user friendliness, which situations they are best suited for and how different time aspects might affect them. A total of 60 establishments have been made over the course of three days while comparing the results to a known reference point. The results showed that RUFRIS is better suited for horizontal measurements, is quick to use and needs a larger area, while the 180-seconds method is better suited for vertical measurements, takes a bit longer and requires less space.

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Slavova, Tzvetomila. „Résolution triangulaire de systèmes linéaires creux de grande taille dans un contexte parallèle multifrontal et hors-mémoire“. Thesis, Toulouse, INPT, 2009. http://www.theses.fr/2009INPT016H/document.

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Nous nous intéressons à la résolution de systèmes linéaires creux de très grande taille par des méthodes directes de factorisation. Dans ce contexte, la taille de la matrice des facteurs constitue un des facteurs limitants principaux pour l'utilisation de méthodes directes de résolution. Nous supposons donc que la matrice des facteurs est de trop grande taille pour être rangée dans la mémoire principale du multiprocesseur et qu'elle a donc été écrite sur les disques locaux (hors-mémoire : OOC) d'une machine multiprocesseurs durant l'étape de factorisation. Nous nous intéressons à l'étude et au développement de techniques efficaces pour la phase de résolution après une factorization multifrontale creuse. La phase de résolution, souvent négligée dans les travaux sur les méthodes directes de résolution directe creuse, constitue alors un point critique de la performance de nombreuses applications scientifiques, souvent même plus critique que l'étape de factorisation. Cette thèse se compose de deux parties. Dans la première partie nous nous proposons des algorithmes pour améliorer la performance de la résolution hors-mémoire. Dans la deuxième partie nous pousuivons ce travail en montrant comment exploiter la nature creuse des seconds membres pour réduire le volume de données accédées en mémoire. Dans la première partie de cette thèse nous introduisons deux approches de lecture des données sur le disque dur. Nous montrons ensuite que dans un environnement parallèle le séquencement des tâches peut fortement influencer la performance. Nous prouvons qu'un ordonnancement contraint des tâches peut être introduit; qu'il n'introduit pas d'interblocage entre processus et qu'il permet d'améliorer les performances. Nous conduisons nos expériences sur des problèmes industriels de grande taille (plus de 8 Millions d'inconnues) et utilisons une version hors-mémoire d'un code multifrontal creux appelé MUMPS (solveur multifrontal parallèle). Dans la deuxième partie de ce travail nous nous intéressons au cas de seconds membres creux multiples. Ce problème apparaît dans des applications en electromagnétisme et en assimilation de données et résulte du besoin de calculer l'espace propre d'une matrice fortement déficiente, du calcul d'éléments de l'inverse de la matrice associée aux équations normales pour les moindres carrés linéaires ou encore du traitement de matrices fortement réductibles en programmation linéaire. Nous décrivons un algorithme efficace de réduction du volume d'Entrées/Sorties sur le disque lors d'une résolution hors-mémoire. Plus généralement nous montrons comment le caractère creux des seconds -membres peut être exploité pour réduire le nombre d'opérations et le nombre d'accès à la mémoire lors de l'étape de résolution. Le travail présenté dans cette thèse a été partiellement financé par le projet SOLSTICE de l'ANR (ANR-06-CIS6-010)
We consider the solution of very large systems of linear equations with direct multifrontal methods. In this context the size of the factors is an important limitation for the use of sparse direct solvers. We will thus assume that the factors have been written on the local disks of our target multiprocessor machine during parallel factorization. Our main focus is the study and the design of efficient approaches for the forward and backward substitution phases after a sparse multifrontal factorization. These phases involve sparse triangular solution and have often been neglected in previous works on sparse direct factorization. In many applications, however, the time for the solution can be the main bottleneck for the performance. This thesis consists of two parts. The focus of the first part is on optimizing the out-of-core performance of the solution phase. The focus of the second part is to further improve the performance by exploiting the sparsity of the right-hand side vectors. In the first part, we describe and compare two approaches to access data from the hard disk. We then show that in a parallel environment the task scheduling can strongly influence the performance. We prove that a constraint ordering of the tasks is possible; it does not introduce any deadlock and it improves the performance. Experiments on large real test problems (more than 8 million unknowns) using an out-of-core version of a sparse multifrontal code called MUMPS (MUltifrontal Massively Parallel Solver) are used to analyse the behaviour of our algorithms. In the second part, we are interested in applications with sparse multiple right-hand sides, particularly those with single nonzero entries. The motivating applications arise in electromagnetism and data assimilation. In such applications, we need either to compute the null space of a highly rank deficient matrix or to compute entries in the inverse of a matrix associated with the normal equations of linear least-squares problems. We cast both of these problems as linear systems with multiple right-hand side vectors, each containing a single nonzero entry. We describe, implement and comment on efficient algorithms to reduce the input-output cost during an outof- core execution. We show how the sparsity of the right-hand side can be exploited to limit both the number of operations and the amount of data accessed. The work presented in this thesis has been partially supported by SOLSTICE ANR project (ANR-06-CIS6-010)

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Karlgaard, Christopher David. „Second-Order Relative Motion Equations“. Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/34025.

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This thesis presents an approximate solution of second order relative motion equations. The equations of motion for a Keplerian orbit in spherical coordinates are expanded in Taylor series form using reference conditions consistent with that of a circular orbit. Only terms that are linear or quadratic in state variables are kept in the expansion. A perturbation method is employed to obtain an approximate solution of the resulting nonlinear differential equations. This new solution is compared with the previously known solution of the linear case to show improvement, and with numerical integration of the quadratic differential equation to understand the error incurred by the approximation. In all cases, the comparison is made by computing the difference of the approximate state (analytical or numerical) from numerical integration of the full nonlinear Keplerian equations of motion.
Master of Science

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Ben, Romdhane Mohamed. „Higher-Degree Immersed Finite Elements for Second-Order Elliptic Interface Problems“. Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/39258.

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A wide range of applications involve interface problems. In most of the cases, mathematical modeling of these interface problems leads to partial differential equations with non-smooth or discontinuous inputs and solutions, especially across material interfaces. Different numerical methods have been developed to solve these kinds of problems and handle the non-smooth behavior of the input data and/or the solution across the interface. The main focus of our work is the immersed finite element method to obtain optimal numerical solutions for interface problems. In this thesis, we present piecewise quadratic immersed finite element (IFE) spaces that are used with an immersed finite element (IFE) method with interior penalty (IP) for solving two-dimensional second-order elliptic interface problems without requiring the mesh to be aligned with the material interfaces. An analysis of the constructed IFE spaces and their dimensions is presented. Shape functions of Lagrange and hierarchical types are constructed for these spaces, and a proof for the existence is established. The interpolation errors in the proposed piecewise quadratic spaces yield optimal O(h³) and O(h²) convergence rates, respectively, in the L² and broken H¹ norms under mesh refinement. Furthermore, numerical results are presented to validate our theory and show the optimality of our quadratic IFE method. Our approach in this thesis is, first, to establish a theory for the simplified case of a linear interface. After that, we extend the framework to quadratic interfaces. We, then, describe a general procedure for handling arbitrary interfaces occurring in real physical practical applications and present computational examples showing the optimality of the proposed method. Furthermore, we investigate a general procedure for extending our quadratic IFE spaces to p-th degree and construct hierarchical shape functions for p=3.
Ph. D.

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Gulino, Sarah, und Christine Guzman. „A Comparison of Bergstrom’s 60 Second Kinetics Method with the Matzke Method of Vancomycin Kinetics“. The University of Arizona, 2008. http://hdl.handle.net/10150/624272.

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Class of 2008 Abstract
Objectives: A novel method of predicting vancomycin trough levels at steady state was studied to determine whether it could effectively predict vancomycin trough levels compared to an established predictor method (Matzke). Methods: Adult patients who received at least two consecutive doses of vancomycin and had at least one reported vancomycin trough at steady state were considered. Data extracted and analyzed included patient gender, age, weight, height, and serum creatinine as well as vancomycin dose and interval, number of consecutive doses prior to the trough, time between trough and preceding dose, and measured vancomycin trough level. This data was applied to each of the prediction methods to determine how accurately they predicted actual measured vancomycin trough levels at steady state. Results: Data from 103 patients was analyzed. Vancomycin trough predictions using the Bergstrom method averaged 12.2 mg/dl, with a standard deviation of 3.4. The average actual trough concentration was 10.7 mg/dl with a standard deviation of 3.9, while the Matzke method predicted an average trough concentration of 19.2 mg/dl with a standard deviation of 8.6. Predictions made using the Bergstrom Method were not significantly different than the actual trough concentrations (p = 0.91). The Bergstrom method predicted concentrations within 25% of actual concentrations 42% of the time and within 50% of actual concentrations 78% of the time. Conclusions: The Bergstrom method was a more reliable predictor of vancomycin trough concentrations than the Matzke method in this patient population. Although more research is needed, the Bergstrom method may prove to be a useful tool for pharmacists to predict vancomycin trough concentrations quickly and with relative accuracy for individual patients.

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Rumbe, George Otieno. „Performance evaluation of second price auction using Monte Carlo simulation“. Diss., Online access via UMI:, 2007.

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Garza, Maria. „Second Language Recall in Methods of Learning“. ScholarWorks, 2019. https://scholarworks.waldenu.edu/dissertations/6788.

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This dissertation examined the relationship between the acquisition and recall of English language vocabulary. This study explored 2 different learning recall strategies to determine which approach was the quickest or more efficient way to remember vocabulary words. Previous researchers had focused on learning a second language phonetically and had not explored different instructional strategies to study the most useful or quickest way to learn a second language for adults. However, there remains an important gap in the current research regarding how to present different methods of instruction to acquire a new second language more rapidly. The purpose of this study was to determine which method was easier and quicker to assist the second language learner to recall and acquire vocabulary. The sample came from 3 different adult second language classrooms. The participants completed a pretest to assess their English word knowledge before the treatment. The participants had a timed 15-min or 30-min period to learn the cards for recall using flash cards with words only or with words and pictures. Once the period was over, the participants completed a posttest measure of language acquisition. There were no statistically significant differences in posttest scores based on method of learning, length of time for learning, or the interaction between the two. The results of the study added to the research on determining whether different instructional methods assisted an adult second language learner to acquire a second language more swiftly.

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Dobrev, Veselin Asenov. „Preconditioning of discontinuous Galerkin methods for second order elliptic problems“. [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2531.

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El-Sharif, Najla Saleh Ahmed. „Second-order methods for some nonlinear second-order initial-value problems with forcing“. Thesis, Brunel University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309501.

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Bücher zum Thema "Seconds method"

Anderson, Dale L. Muscle pain relief in 90 seconds: The fold and hold method. Minneapolis: Cronimed Pub., 1995.

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Anderson, Dale L. Muscle pain relief in 90 seconds: The fold and hold method. Minneapolis, MN: Chronimed Pub., 1995.

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90 seconds to muscle pain relief: The fold and hold method. Minneapolis, Minn: CompCare Publishers, 1992.

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Second philosophy: A naturalistic method. Oxford: Oxford University Press, 2007.

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Chambers, E., und MB Wolf, Hrsg. Sensory Testing Methods: Second Edition. 100 Barr Harbor Drive, PO Box C700, West Consho hocken, PA 19428-2959: ASTM International, 1996. http://dx.doi.org/10.1520/mnl26-eb.

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Archer, Anita L. Phonics for reading: Second level. North Billerica, Mass: Curriculum Associates, 1991.

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Mackey, Alison, und Susan M. Gass, Hrsg. Research Methods in Second Language Acquisition. Chichester, UK: John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9781444347340.

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Shepherd, Adrian J. Second-Order Methods for Neural Networks. London: Springer London, 1997. http://dx.doi.org/10.1007/978-1-4471-0953-2.

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Tony, Brown, und Jennifer Bown. To advanced proficiency and beyond: Theory and methods for developing superior second language ability. Washington, D.C: Georgetown University Press, 2015.

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McDonough, Kim. Using priming methods in second language research. Abingdon, Oxon: Routledge, 2008.

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Buchteile zum Thema "Seconds method"

Pytlak, Radosław. „Second order method“. In Lecture Notes in Mathematics, 81–128. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/bfb0097249.

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Gandolfo, Giancarlo. „Liapunov’s Second Method“. In Economic Dynamics, 401–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03871-6_22.

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Gandolfo, Giancarlo. „Liapunov’s Second Method“. In Economic Dynamics, 407–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-06822-9_23.

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Jukna, Stasys. „The Second Moment Method“. In Texts in Theoretical Computer Science. An EATCS Series, 273–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-662-04650-0_24.

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Jukna, Stasys. „The Second Moment Method“. In Texts in Theoretical Computer Science. An EATCS Series, 303–12. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17364-6_21.

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Nesterov, Yurii. „Second-Order Methods“. In Lectures on Convex Optimization, 241–322. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91578-4_4.

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Locatelli, Arturo. „Second variation methods“. In Optimal Control, 221–48. Basel: Birkhäuser Basel, 2001. http://dx.doi.org/10.1007/978-3-0348-8328-3_7.

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Walenta, Magdalena. „Research Method“. In Second Language Learning and Teaching, 115–54. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-04699-6_4.

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Mackey, Alison, und Susan M. Gass. „Mixed Methods“. In Second Language Research, 398–414. 3. Aufl. New York: Routledge, 2021. http://dx.doi.org/10.4324/9781003188414-25.

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Höhn, Sviatlana. „Method Evaluation“. In Artificial Companion for Second Language Conversation, 255–63. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15504-9_9.

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Konferenzberichte zum Thema "Seconds method"

Yuanyuan, Jin, Wang Feiming, Cheng Hui, Li Xingyu, Li Bing und Geng Baohong. „Characteristic Analysis and Test Method of Pre-arc Seconds Characteristic of 12kV Drop-out Fuse“. In 2020 5th International Conference on Power and Renewable Energy (ICPRE). IEEE, 2020. http://dx.doi.org/10.1109/icpre51194.2020.9233223.

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Namouz, Essam, Joshua D. Summers und Gregory M. Mocko. „Reasoning: Source of Variability in the Boothroyd and Dewhurst Assembly Time Estimation Method“. In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-71075.

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This paper evaluates the effect of making a subjective decision in a design for assembly time analysis. An example is found in the first set of questions for estimating handling time of a part the user chose “parts are easy to grasp and manipulate” as opposed to “parts present handling difficulties”. The subjectivity is explored through a study of assembly time estimates generated by a class of mechanical engineering students in the time analysis of a clicker pen based on the Boothroyd and Dewhurst estimation method. The assembly times calculated by the class ranged from a minimum of 23.64 seconds to a maximum of 44.89 seconds (range of 21.25 seconds). This large range in results serves as motivation in determining the effect that answering a subjective decision has on the resulting assembly time estimate. Initial results indicate that not answering the first level of subjective questions will result in assembly time estimate within 15% of the time had the subjective question been answered. The probability density plots of the time estimates also indicates that 63% of the time, the estimated assembly time without making the subjective decision will fall within the normal distribution had the subjective decision been made. This provides evidence that there is an opportunity to reduce the amount of subjective questions that a user must answer to estimate the assembly time of a product.

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Koblick, Darin, Mark Poole und Praveen Shankar. „Parallel High-Precision Orbit Propagation Using the Modified Picard-Chebyshev Method“. In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-87878.

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The modified Picard-Chebyshev method, when run in parallel, is thought to be more accurate and faster than the most efficient sequential numerical integration techniques when applied to orbit propagation problems. Previous experiments have shown that the modified Picard-Chebyshev method can have up to an order of magnitude speedup over the 12th order Runge-Kutta-Nystrom method. For this study, the evaluation of the accuracy and computational time of the modified Picard-Chebyshev method, using the Java Astrodynamics Toolkit (JAT) high-precision force model, is conducted to assess its runtime performance. Simulation results of the modified Picard-Chebyshev method, implemented in MATLAB and the MATLAB Parallel Computing Toolbox, are compared against the most efficient first and second order Ordinary Differential Equation (ODE) solvers. A total of six processors were used to assess the runtime performance of the modified Picard-Chebyshev method. It was found that for all orbit propagation test cases, where the gravity model was simulated to be of higher degree and order (10 additional function calls to JAT using a 70 degree × 70 order Earth Gravity Model to increase computational overhead to 0.142 seconds per force function call), the modified Picard-Chebyshev method was faster, by as much as 100%, than the other ODE solvers which were tested.

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Agger, Christian, und Henrik Sørensen. „Modified Method of Characteristics for Generating EOR Oil Recovery Curves“. In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205918-ms.

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Abstract The paper describes a fast and approximate 1D simulation algorithm for calculating the percent recovery that can be obtained from an oil reservoir if gas injection is carried out at a pressure lower than the minimum miscibility pressure. The algorithm is based on the Method of Characteristics. While a conventional 1D reservoir simulation of a gas injection scenario may take minutes or even hours, the proposed algorithm allows a full evaluation of the recovery to be completed within seconds. To make the method numerically robust, a number of approximations were needed. The result is an extremely fast algorithm that not only provides a good estimate of the recovery obtained by gas injection, but also gives a good visualization of how the gas displaces the oil.

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Sheikh, Rizwan, und Kevin Ewans. „A Method for Deriving Infragravity Wave Design Criteria in Shallow Water“. In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-41720.

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Infragravity waves are long waves with periods of 30 to 300 seconds. They are most apparent in shallow-water and can have a large impact on the response of moored vessels, particularly large tankers such as LNG vessels, with long natural periods. A method for estimating infragravity wave design criteria for a shallow-water location is demonstrated. The method uses a combination of hindcast wave data and an idealised model for simulating infragravity waves. By way of example, a case study on the application of the Ideal Surf Beat (IDSB) model to simulate infragravity waves in the coastal waters of Barrow Island, Australia, and the subsequent estimation of extreme criteria quantifying the infragravity wave energy for a possible export berth location, is described.

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Soujoudi, Ramin. „Application of Inverse Heat Conduction Method and Method of Lines in Spray Cooling of Heated Surface“. In ASME 2016 Heat Transfer Summer Conference collocated with the ASME 2016 Fluids Engineering Division Summer Meeting and the ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ht2016-7477.

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This paper investigates application of Method of Lines (MOL) and Inverse Heat Conduction techniques in spray cooling process. A flat face of a heated cylinder is cooled by using a nozzle spray and using room temperature water as a cooling fluid. The numerical analysis is done using MOL to estimate exposed surface temperature, surface heat flux, and convection heat transfer coefficient [3],[4]. Since there is no exact solution to verify the approximation result, for the verification purpose and accuracy of the result, the numerical result from this study is compared to other approximation results with experimental research done by Chen-Lee and Qiao-Chandra [1]. The results illustrate that disparity between the outcome of MOL and the one generated by Chen and Lee’s raw data is very insignificant throughout the whole time domain. This discrepancy between these two estimated results proves that MOL is a very reliable approximation technique compared to other finite element methods which require a finer mesh size and significant amount of calculations[2],[5]. However, comparing the results obtained through MOL with Qiao and Chandra shows that the difference between the estimated heat transfer coefficient and estimated heat flux converges rapidly for the short times of 0 < t < 60, but as the time passes, the MOL approximation results diverge slowly until it reaches its maximum value at ninety seconds, and the variance remains almost constant for the rest of the time period.

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Liu, Yonghui. „On Second-Order Roll Motions of Ships“. In ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2003. http://dx.doi.org/10.1115/omae2003-37022.

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More and more vessels for offshore engineering applications have a roll period beyond 20 seconds in order to avoid the wave frequency excitations on the roll motion. That is particularly true for the latest drilling vessels. However, this will lead to an unexpected second-order roll motion of the ships. This paper will present a new methodology to evaluate the second-order roll motions of the ships in random seas. The higher-order boundary element method (HOBEM) has been utilized to generate the second order difference-frequency roll excitations on the ships and the second-order ship roll motions were predicted by a frequency-domain method. A series of model tests have been conducted and the test results have a good agreement with the numerical predictions. Therefore, this new method has been verified and validated.

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Pharoah, J. G. „An Efficient Method for Estimating Flow in the Serpentine Channels and Electrodes of PEM Fuel Cells“. In ASME 4th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2006. http://dx.doi.org/10.1115/icnmm2006-96232.

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This paper presents the development of a simple resistance network model to represent the flow in the serpentine channels and electrodes of PEM fuel cells. The model results are compared to full 3D CFD predictions and reasonable agreement is demonstrated while computational times are reduced from 8 hours to seconds. The CFD results are also used to extract correlations for the pressure losses in the serpentine bends which can be used to alleviate the major shortcoming of the resistance model. As is, the resistance model is linear in velocity and as such is insensitive Re variations, but with the addition of non-linear losses in the bend this will no longer be the case.

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Morinishi, Koji, und Tomohiro Fukui. „Fluid-Structure Interactive Simulation Using a Virtual Flux Method“. In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-20011.

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This paper describes the resent development of a virtual flux method for simulating fluid-structure interaction problems. The virtual flux method is one of the sharp interface Cartesian grid methods. The numerical flux across the interface is replaced with the virtual flux so that proper interface conditions must be satisfied there. In this study, the virtual flux method is applied to numerical flow simulations about reciprocating engines. The compressible Navier-Stokes equations are coupled with the equation of motion of the piston, connecting rod, and crank system. Intake and exhaust valves are lifted up and down according with the crank angle in the intake and exhaust strokes. Instead of modeling the complex fuel combustion process, a proper amount of energy is added to the Navier-Stokes equation at the beginning of each expansion stroke, to retain the four stroke engine cycle at a constant revolution rate. Initially the engine is started by starter motor force, which is added for a few seconds. The engine comes to work at the revolution rate intended after some initial transition cycles. With designing the intake and exhaust valve lift properly, intake mass and revolution rate are improved by several percent. It is confirmed that the virtual flux method is easily applicable to the simulation of fluid-structure interaction problems.

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Lee, Yu-Ming, Shuo-Jen Lee und Cheng-Hong Shih. „A EMM Fabrication Method of Metallic Bipolar Plates for PEM Fuel Cell“. In ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/fuelcell2008-65160.

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A prototype of metallic PEM fuel cell with thin stainless steel bipolar plates is tested for their potential applications in portable electronic products. The bipolar plate is produced by UV-LIGA and electrochemical micro-machining (EMM) technologies. The cathode electrode, the tool, is the mirror image of flow channels. It is produced by the UV-LIGA technology and the dimension is 200μm in width and 500μm in height for the intension to fabricate a serpentine flow channel of 500μm width and 200μm depth. The flow channels on 0.6mm thick SS 316L plates are fabricated by EMM process within 30 seconds with effective area of 625mm2. From the results of cell performance tests, the peak power densities are 0.67 W/cm2 at 0.45 V. During the 5 hours of cell life test, the cell was operated with a constant load of 0.4 V. The peak power density is stable. It just dropped slightly from 0.7 W/cm2 to 0.65 W/cm2. The results demonstrate the UV-LIGA and EMM technologies is an efficient method to fabricate flow channel for stainless steel bipolar plates.

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Berichte der Organisationen zum Thema "Seconds method"

Dolch, Theodore, Neha Mehta und Eugene Homentowski. Five-Second Explosion Temperature (U.S. Army ARDEC Method). Users Manual. Fort Belvoir, VA: Defense Technical Information Center, Juni 2009. http://dx.doi.org/10.21236/ada502805.

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Schnabel, Robert B., und Ta-Tung Chow. Tensor Methods for Unconstrained Optimization Using Second Derivatives. Fort Belvoir, VA: Defense Technical Information Center, Juli 1989. http://dx.doi.org/10.21236/ada213642.

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Manzini, Gianmarco. Annotations on the virtual element method for second-order elliptic problems. Office of Scientific and Technical Information (OSTI), Januar 2017. http://dx.doi.org/10.2172/1338710.

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Colella, P., D. T. Graves und J. A. Greenough. A second-order method for interface reconstruction in orthogonal coordinate systems. Office of Scientific and Technical Information (OSTI), Januar 2002. http://dx.doi.org/10.2172/834475.

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Singer, C., und D. Cox. Methods for testing transport models. Second year annual report. Office of Scientific and Technical Information (OSTI), November 1991. http://dx.doi.org/10.2172/10108502.

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Riggs, J. B. Comparison of advanced distillation control methods. Second annual report. Office of Scientific and Technical Information (OSTI), November 1996. http://dx.doi.org/10.2172/565443.

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Joseph, Renu, Christine A. Shields, Jonathan J. Rutz, L. Ruby Leung, F. Martin Ralph, Michael Wehner, Travis A. O’Brien und Roger Pierce. Atmospheric River Tracking Method Intercomparison Project (ARTMIP): Report of the Second ARTMIP Workshop. Office of Scientific and Technical Information (OSTI), April 2018. http://dx.doi.org/10.2172/1616534.

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Petersson, N., und B. Sjogreen. Serpentine: Finite Difference Methods for Wave Propagation in Second Order Formulation. Office of Scientific and Technical Information (OSTI), März 2012. http://dx.doi.org/10.2172/1046802.

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Young, D. M., und D. R. Kincaid. Linear stationary second-degree methods for the solution of large linear systems. Office of Scientific and Technical Information (OSTI), Juli 1990. http://dx.doi.org/10.2172/674848.

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Sano, Shoichi, Yasuharu Oyama, Akio Nemoto und Atsushi Seki. A New Steering Control Method and Its Evaluation (Second Report)~Evaluation of Azimuth Angle Feedback System. Warrendale, PA: SAE International, Mai 2005. http://dx.doi.org/10.4271/2005-08-0356.

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