Academic literature on the topic 'Logical MS/MS'

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Journal articles on the topic "Logical MS/MS"

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Snyder, Dalton T., Lucas J. Szalwinski, J. Mitchell Wells, and R. Graham Cooks. "Logical MS/MS scans: a new set of operations for tandem mass spectrometry." Analyst 143, no. 22 (2018): 5438–52. http://dx.doi.org/10.1039/c8an01661e.

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Mottier, Nicolas, Florent Jeanneret, and Michel Rotach. "Determination of Hydrogen Cyanide in Cigarette Mainstream Smoke by LC/MS/MS." Journal of AOAC INTERNATIONAL 93, no. 3 (May 1, 2010): 1032–38. http://dx.doi.org/10.1093/jaoac/93.3.1032.

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Abstract An LC/MS/MS method is presented for the determination of hydrogen cyanide in cigarette mainstream smoke. Cyanide is derivatized with 2,3-naphthalenedicarboxaldehyde and taurine to form a benzo[f]isoindole derivative, which is then analyzed by LC/MS/MS. Isotopic KCN (K13C15N) was used as an internal standard. The regression equation was linear within the range 2.4331 ng/mL for cyanide with a correlation coefficient >0.999. The LOD was calculated as 4.1 ng/cigarette. The influence of the sodium hydroxide trapping solution concentration on the results is discussed. A 1 M solution showed the best results in terms of sample stability and trapping efficiency. The method proved to be robust, reliable, and more selective than current methods, making it a logical choice for determination of total cyanide in cigarette smoke.
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Chajda, Ivan, and Helmut Länger. "Logical and algebraic properties of generalized orthomodular posets." Mathematica Slovaca 72, no. 2 (March 28, 2022): 275–86. http://dx.doi.org/10.1515/ms-2022-0018.

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Abstract Generalized orthomodular posets were introduced recently by D. Fazio, A. Ledda and the first author of the present paper in order to establish a useful tool for studying the logic of quantum mechanics. They investigated structural properties of these posets. In the present paper, we study logical and algebraic properties of these posets. In particular, we investigate conditions under which they can be converted into operator residuated structures. Further, we study their representation by means of algebras (directoids) with everywhere defined operations. We prove congruence properties for the class of algebras assigned to generalized orthomodular posets and, in particular, for a subvariety of this class determined by a simple identity. Finally, in contrast to the fact that the Dedekind-MacNeille completion of an orthomodular poset need not be an orthomodular lattice, we show that the Dedekind-MacNeille completion of a stronger version of a generalized orthomodular poset is nearly an orthomodular lattice.
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Nathoo, Nabeela, V. Wee Yong, and Jeff F. Dunn. "Using magnetic resonance imaging in animal models to guide drug development in multiple sclerosis." Multiple Sclerosis Journal 20, no. 1 (November 21, 2013): 3–11. http://dx.doi.org/10.1177/1352458513512709.

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Major advances are taking place in the development of therapeutics for multiple sclerosis (MS), with a move past traditional immunomodulatory/immunosuppressive therapies toward medications aimed at promoting remyelination or neuroprotection. With an increase in diversity of MS therapies comes the need to assess the effectiveness of such therapies. Magnetic resonance imaging (MRI) is one of the main tools used to evaluate the effectiveness of MS therapeutics in clinical trials. As all new therapeutics for MS are tested in animal models first, it is logical that MRI be incorporated into preclinical studies assessing therapeutics. Here, we review key papers showing how MR imaging has been combined with a range of animal models to evaluate potential therapeutics for MS. We also advise on how to maximize the potential for incorporating MRI into preclinical studies evaluating possible therapeutics for MS, which should improve the likelihood of discovering new medications for the condition.
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Pitt, David, Chih Hung Lo, Susan A. Gauthier, Richard A. Hickman, Erin Longbrake, Laura M. Airas, Yang Mao-Draayer, et al. "Toward Precision Phenotyping of Multiple Sclerosis." Neurology - Neuroimmunology Neuroinflammation 9, no. 6 (August 30, 2022): e200025. http://dx.doi.org/10.1212/nxi.0000000000200025.

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The classification of multiple sclerosis (MS) has been established by Lublin in 1996 and revised in 2013. The revision includes clinically isolated syndrome, relapsing-remitting, primary progressive and secondary progressive MS, and has added activity (i.e., formation of white matter lesions or clinical relapses) as a qualifier. This allows for the distinction between active and nonactive progression, which has been shown to be of clinical importance. We propose that a logical extension of this classification is the incorporation of additional key pathological processes, such as chronic perilesional inflammation, neuroaxonal degeneration, and remyelination. This will distinguish MS phenotypes that may present as clinically identical but are driven by different combinations of pathological processes. A more precise description of MS phenotypes will improve prognostication and personalized care as well as clinical trial design. Thus, our proposal provides an expanded framework for conceptualizing MS and for guiding development of biomarkers for monitoring activity along the main pathological axes in MS.
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Horda, Iryna M., and Leonid O. Flehantov. "КОМП’ЮТЕРНЕ МОДЕЛЮВАННЯ ПРОЦЕСУ МЕХАНІЧНОГО РУХУ ТІЛА ЗАСОБАМИ MS EXCEL." Information Technologies and Learning Tools 47, no. 3 (June 6, 2015): 99. http://dx.doi.org/10.33407/itlt.v47i3.1245.

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The mathematical model of body motion is analyzed, thrown at the angle to the horizon in a gravitational field and its computer realization with the help of MS Excel means. The recommended technique allows during laboratory work analyze mechanical body motion, carry out calculable experiments, changing the outgoing model parameters such as initial posture, location purposes, geometric dimensions of ball and basket, initial velocity and angle, and also acceleration of gravity; explore the mechanical motion in hypothetical conditions that are difficult to implement in practice. Using this technique promotes logical thinking development of students, motivation to learn the subject, interest, better learning of basic theoretical positions, skills forming of research activity.
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Estrada-López, Mar, Sheila García-Martín, and Isabel Cantón-Mayo. "Cognitive Dysfunction in Multiple Sclerosis: Educational Level as a Protective Factor." Neurology International 13, no. 3 (July 22, 2021): 335–42. http://dx.doi.org/10.3390/neurolint13030034.

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Most people with MS experience cognitive deficits especially in attention, memory, information processing, and executive functions, negatively impacting on their quality of life. Cognitive variables of short-term memory, logical memory, and verbal fluency in 65 patients with multiple sclerosis (MS) were analysed in conjunction with sociodemographic variables such as sex, age, and educational level that might influence disease progression. We found that psychoeducational variables exerted a significant effect on the cognitive status of patients with MS. Thus, when considering sex, age, educational level, and type of MS (SPMS or RRMS), tests for between-subject effects revealed statistically significant differences in all three cognitive variables. In addition, we found that the type of MS and time since onset also generated significant cognitive differences. Our study shows that educational achievement or level is a protective factor against the disease, acting as a source of intellectual enrichment that promotes cognitive reserve in patients with MS. Further longitudinal studies assessing disease progression and prognosis in patients with MS would be useful in order to determine the specific importance of these variables in such patients and in strategies that could enhance their performance in neuropsychological assessment tasks.
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Han, Guo Zheng. "Harmonization of Feeder Terminal Unit Information Model Based on IEC 61850 and IEC 61968/61970." Applied Mechanics and Materials 411-414 (September 2013): 1787–90. http://dx.doi.org/10.4028/www.scientific.net/amm.411-414.1787.

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The feeder terminal unit (FTU) is a kind of distribution remote terminal unit along distribution feeders and communication with master stations (MS) in control centre. IEC 61970/61968/61850 are three important standard for smart grid. IEC 61850 logical nodes are used for FTUs information model, and IEC 61970/61968 common information model (CIM) are using in MS. To realizing seamless access FTUs to MS, harmonization of IEC 61850 and IEC 61968/61970 are studied. The status information (such as position of switch) and measurement information (such as current, voltage) are realizing mapping from IEC 61850 to IEC 61968/61970. So, the seamless communication between the master station and FTU is realized.
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Gruen, Margaret E., B. Duncan X. Lascelles, Elizabeth Colleran, Alison Gottlieb, Jennifer Johnson, Peter Lotsikas, Denis Marcellin-Little, and Bonnie Wright. "2022 AAHA Pain Management Guidelines for Dogs and Cats." Journal of the American Animal Hospital Association 58, no. 2 (February 23, 2022): 55–76. http://dx.doi.org/10.5326/jaaha-ms-7292.

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ABSTRACT These updated guidelines present a practical and logical approach to the assessment and management of acute and chronic pain in canine and feline patients. Recognizing pain is fundamental to successful treatment, and diagnostic guides and algorithms are included for assessment of both acute and chronic pain. Particularly for chronic pain, capturing owner evaluation is important, and pain-assessment instruments for pet owners are described. Expert consensus emphasizes proactive, preemptive pain management rather than a reactive, “damage control” approach. The guidelines discuss treatment options centered on preemptive, multimodal analgesic therapies. There is an extensive variety of pharmacologic and nonpharmacologic therapeutic options for the management of acute and chronic pain in cats and dogs. The guidelines include a tiered decision tree that prioritizes the use of the most efficacious therapeutic modalities for the treatment of acute and chronic pain.
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Ghafarpour, Amin, Farhad Khormali, William Balsam, Alireza Karimi, and Shamsollah Ayoubi. "Climatic interpretation of loess-paleosol sequences at Mobarakabad and Aghband, Northern Iran." Quaternary Research 86, no. 1 (July 2016): 95–109. http://dx.doi.org/10.1017/s0033589400039740.

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AbstractLoess accumulation and paleosol formation are important Quaternary geoarchives in northern Iran. Two loess-paleosol sequences at Mobarakabad and Aghband were examined using soil morphology and micromorphology, mineralogy, magnetic susceptibility (MS), free Fe oxides and calcium carbonate equivalent. The loess-paleosol sequences provide a record of changes in paleo-rainfall in the northern Iran. Micromorphological and MS differences between the loess and paleosols in the sections reflect changes in climate. The different behaviors of magnetic susceptibility between Aghband and Mobar-akabad loess are mainly produced by their different pedogenic environments, topography and climatic conditions. As a result, the MS at the Mobarakabad section is much higher than at Aghband. Paleoeco-logical reconstructions coupled with magnetic depletion in paleosols at Mobarakabad suggest a wetter climate dominating during the formation of the paleosols.
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Dissertations / Theses on the topic "Logical MS/MS"

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Berger, Roman. "Aplikace metodiky projektového managementu ve vybrané společnosti." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2017. http://www.nusl.cz/ntk/nusl-318330.

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The subject and main goal of the diploma thesis is the application of the project management methodology at VAGONKA-INTERIORS s.r.o. Project management tools are applied in a project focused on the development and production of new technology. The thesis is focused on the practical use of outputs and work with MS Project software. The work will serve as a basis for the implementation of the project.
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Macik, Martin. "Implementace ERP systému Money S5 podle metodiky projektového managementu." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2014. http://www.nusl.cz/ntk/nusl-224736.

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The subject and main aim of my diploma thesis is an application of selected project management methodology (IPMA) for analysing, design and implementation ERP system Money S5 to the particular client. Project is created in environment of implementation projects designed by software company CÍGLER SOFTWARE a.s. located in Bratislava. This thesis could be used as a suggestion of appropriate steps for managing future implementing projects in mentioned company.
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Lukesová, Kristýna. "Logické úlohy a hlavolamy jako optimalizační problémy." Master's thesis, Vysoká škola ekonomická v Praze, 2011. http://www.nusl.cz/ntk/nusl-113465.

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This thesis applies classical optimization problems such as assignment or set-covering problem on logical puzzles or brainteasers. Listed in the first part are mathematical model, description and typical example of each optimization problem used in this thesis. The second part contains these models applied to the particular brainteasers for example Sudoku or Einstein's Puzzle. Exercises are divided into simpler and more complex ones. There is specification, source and a described method of solution stated for each of them. The calculation examples use Lingo or MS Excel or both. The aim is to show the possibility to address logical puzzles and brainteasers with the use of optimization problems, and thus confirm the wide possibilities of using these models. These examples can clarify and diversify the curriculum.
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Procházka, Tomáš. "Aplikace fuzzy logiky pro výběr dodavatelů." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2013. http://www.nusl.cz/ntk/nusl-224191.

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This diploma thesis deals with the selection of suppliers operating memory for the company Hon Hai Precision Industry Co., Ltd. (registered in the Czech Republic under the trade name Foxconn) using fuzzy logic.
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Šebelová, Dana. "Aplikace fuzzy logiky při hodnocení dodavatelů firmy." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2015. http://www.nusl.cz/ntk/nusl-225128.

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Šebelová, D. The object of the diploma thesis is to analyze the suppliers of the company BioVendor – Laboratorní medicína a.s. Supplier evaluation is performed in MS Excel and MATLAB. The target is to determine the best suppliers of the company.
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Šedivý, Roman. "Aplikace fuzzy logiky při hodnocení dodavatele inventárního systému." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-232878.

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Master's thesis will deal with the evaluation of the tender for supplier of inventory system using advanced artificial intelligence methods. For solution will be used MS Excel and MATLAB programming and its Toolboxes.
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Pešáková, Darina. "Riziko výběru společností s využitím fuzzy logiky." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318274.

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Creating a decision-making system for evaluating cooperation between companies based on the fuzzy model in MS Excel and MATLAB programming environment. Subsequent evaluation of possible risks for the selected company.
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Špinár, Lukáš. "Aplikace fuzzy logiky pro hodnocení kvality zákazníků." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2021. http://www.nusl.cz/ntk/nusl-444550.

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The diploma thesis deals with the use of fuzzy logic in the evaluation of customers in the business company SPINA Trade, s.r.o. MS Excel and MATLAB are used to program two models. Based on the input attributes regarding the customer, the model evaluates the recommended approach to the customer and his priority.
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Koval, Stanislav. "Aplikace fuzzy logiky při hodnocení dodavatelů firmy." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2012. http://www.nusl.cz/ntk/nusl-223602.

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The object of the diploma thesis is to analyze the suppliers of the company STABILA ČR s. r. o. In the thesis are used methods that utilize the basic principles of fuzzy logic. Evaluation of the best suppliers for 2011 is provided in MS Excel and MATLAB. The target is to determine the best material suppliers of the year 2011.
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Mičák, Peter. "Aplikace fuzzy logiky při hodnocení dodavatelů firmy." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2017. http://www.nusl.cz/ntk/nusl-318313.

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Master’s thesis deals with designing decision making system based on fuzzy logic principles which evaluates suppliers offers. In this Master’s thesis there were created two decision making systems based on the demands of the company. First decision making system was designed within the environment of MS Excel, the second one was designed in MATLAB software. In addition of creating the decision making system the thesis puts emphasis on the analysis of the current decision making model in the company and this section will serve as a springboard to designing a decision making system based on fuzzy logic. At the beginning of the work there are included all the necessary theoretical framework on which I based the writing of this thesis.
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Books on the topic "Logical MS/MS"

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Jong, Everardus Johannes De. Galileo Galilei's Logical treatises (MS 27) and Giacomo Zabarella's Opera logica : a comparison. Ann Arbor, MI: University Microfilms International, 1989.

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Four software tools with Lotus 1-2-3, WordPerfect, and dBase III plus: DOS for IBM PC and MS DOS ... Belmont, Calif: Wadsworth Pub. Co., 1988.

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1947-, Bos Egbert P., and Thomas, de Clivis, 14th cent., eds. Logica modernorum in Prague about 1400: The sophistria disputation 'Quoniam quatuor' (MS Cracow, Jagiellonian Library 686, ff. 1ra-79rb) : with a partial reconstruction of Thomas of Cleve's Logica : edition with an introduction and appendices. Leiden: Brill, 2004.

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Lewis, Carroll. Alice's adventures underground: Being a facsimile of the original ms. book afterwards developed into "Alice's adventures in Wonderland". Richmond, Surrey, U.K: Oneworld Classics, 2009.

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Ms project 2002/plan.(4e edi.). Jci Inc, 2002.

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Logicworks: Interactive Circuit Design Software/MS-DOS Version. Benjamin-Cummings Pub Co, 1994.

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Tarski's World: Version 4.0 for MS Windows (Center for the Study of Language and Information - Lecture Notes). Center for the Study of Language and Inf, 1993.

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Hellman, Geoffrey. Structuralism. Edited by Stewart Shapiro. Oxford University Press, 2009. http://dx.doi.org/10.1093/oxfordhb/9780195325928.003.0017.

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The main types of mathematical structuralism that have been proposed and developed to the point of permitting systematic and instructive comparison are four: structuralism based on model theory, carried out formally in set theory (e.g., first- or second-order Zermelo–Fraenkel set theory), referred to as STS (for set-theoretic structuralism); the approach of philosophers such as Shapiro and Resnik of taking structures to be sui generis universals, patterns, or structures in an ante rem sense (explained in this article), referred to as SGS (for sui generis structuralism); an approach based on category and topos theory, proposed as an alternative to set theory as an overarching mathematical framework, referred to as CTS (for category-theoretic structuralism); and a kind of eliminative, quasi-nominalist structuralism employing modal logic, referred to as MS (for modal-structuralism). This article takes these up in turn, guided by few questions, with the aim of understanding their relative merits and the choices they present.
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Parise, Marialuisa. Prima Versione Italiana Del de Dignitate et Augmentis Scientiarum Di Francis Bacon Tradotto Da Antonio Pellizzari. Ms. 1408 - Biblioteca Comunale Di Treviso. L'Erma di Bretschneider, 2013.

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Bos, Egbert P. Logica Modernorum In Prague About 1400: The Sophistria Disputation 'quoniam Quatuor' (ms Cracow, Jagiellonian Library 686, Ff. 1ra-79rb) : With A Partial ... Zur Geistesgeschichte Des Mittelalters). Brill Academic Publishers, 2004.

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Book chapters on the topic "Logical MS/MS"

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Wallace, William A. "The Understanding of Logic Implicit in MS 27." In Boston Studies in the Philosophy of Science, 33–83. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-015-8040-3_2.

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Tabarroni, Andrea. "‘Omnis phoenix est’: Quantification and Existence in a new sophismata-collection (MS Clm 14522)." In Sophisms in Medieval Logic and Grammar, 185–201. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1767-8_10.

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Andrews, Robert. "Resoluble, Exponible, and Officiable Terms in the Sophistria of Petrus Olai, MS Uppsala C 599." In Sophisms in Medieval Logic and Grammar, 3–30. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1767-8_1.

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Rosier, Irène. "La distinction entre actus exercitus et actus significatus dans les sophismes grammaticaux du MS BN lat. 16618 et autres textes apparentés." In Sophisms in Medieval Logic and Grammar, 231–61. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1767-8_13.

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Schuman, Boaz Faraday. "Multiple Generality in Scholastic Logic." In Oxford Studies in Medieval Philosophy Volume 10, 195–262. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780192871244.003.0006.

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Abstract Multiple generality has long been known to cause confusion. For example, “Everyone has a donkey that is running” has two readings: either (i) there is a donkey, owned by everyone, and it is running; or (ii) everyone owns some donkey or other, and all such donkeys run. Medieval logicians were acutely aware of such ambiguities, and the logical problems they pose, and sought to sort them out. One of the most ambitious undertakings in this regard is a pair of massive diagrams (magnae figurae) which map out the logical interrelations of two sets of doubly-general forms. These appear in a fourteenth-century MS of John Buridan’s Summulae de Propositionibus. In this paper, I present these diagrams, and determine the truth conditions of their different forms. To that end, I have developed a bespoke system of diagrams to display their truth conditions. As we will see, such forms present significant difficulties for an all-encompassing account of the role form plays in logic. Accordingly, they can tell us important things about the role logical form plays in Buridan’s account of logical foundations.
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Van den Ende, Jef, Stefano Laganà, Koenraad Blot, Zeno Bisoffi, Erwin Van den Enden, Louis Vermeulen, and Luc Kestens. "Development of KABISA." In Global Information Technologies, 920–27. IGI Global, 2008. http://dx.doi.org/10.4018/978-1-59904-939-7.ch070.

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KABISA is a computer-based program for training in diagnostic problems in (sub-) tropical regions. It challenges the individual student with a randomly generated case, for which he should try to find the diagnosis, asking questions, performing a physical examination, and ordering tests. The built-in tutor follows the student’s input with complex logical algorithms and mathematical computations, gives comments and support, and accepts the final diagnosis if sufficient evidence has been built up. Several problems arose with the development. In the first place, the evolution in the teaching of clinical logic is always ahead of the program, so regular updating of the computer logic is necessary. Secondly, the choice of MS Access as computer language has provoked problems of stability, especially the installation of an MSAccess runtime. Thirdly, and most importantly, scholars want proof of the added value of computer programs over classical teaching. Moreover, the concept of a pedagogical “game” is often regarded as childish. Finally, the planning and financing of an “open-ended” pedagogical project is questioned by deciders, as is the case with all operational research.
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"The Collection of Grammatical Sophismata in ms London, bl, Burney 330: An Exploratory Study." In History of Logic and Semantics, 152–78. BRILL, 2015. http://dx.doi.org/10.1163/9789004324275_009.

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"Programs of Logic at Bologna in the Fourteenth Century and MS Antonianus 391." In University Training in Medieval Europe, 93–116. BRILL, 1993. http://dx.doi.org/10.1163/9789004451919_008.

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Conference papers on the topic "Logical MS/MS"

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Müller-Link, D., J. U. Brandt, M. Reichwage, and G. Schröder. "Wet Gas Compression - A Logical Step to Follow Multiphase Boosting." In Abu Dhabi International Petroleum Exhibition and Conference. Society of Petroleum Engineers, 2002. http://dx.doi.org/10.2118/78556-ms.

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Bednarski, J. A., and E. F. Klementich. "Focused Acceptance Testing: A Logical Approach for Qualifying Critical Service Connections." In IADC/SPE Drilling Conference. Society of Petroleum Engineers, 1986. http://dx.doi.org/10.2118/14728-ms.

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de Bie, Steven, and Nanda Gilden. "Integrating Sustainable Development In The Oil And Gas Industry: The Logical Level Approach To Enhance SD Training Effectiveness." In SPE International Conference on Health, Safety, and Environment in Oil and Gas Exploration and Production. Society of Petroleum Engineers, 2004. http://dx.doi.org/10.2118/86619-ms.

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E. Novitzki, James. "E-Business Education: A Comparison of Graduate Programs and Curricula." In 2002 Informing Science + IT Education Conference. Informing Science Institute, 2002. http://dx.doi.org/10.28945/2549.

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This study looks at both MBA and MS E-business programs. Specifically it looks at the number and types of courses offered in these programs and compares and contrasts what is offered between the MS and MBA programs, and also between the different groups of schools being studied. Results indicate that there is no real consensus in what knowledge is core to the concentration. The programs offered at any particular school seem to have only incidental agreement with other programs, and many seem to be the result of faculty skills available and requests for specific skills from organizations, rather than a logical integrated approach to the issues inherent in the global issues of Ebusiness. There appears to be a major need to determine the core knowledge that is critical in the design, development, management, and operation of E-business in organizations to produce graduates with consistent knowledge that is school independent.
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Lebedev, Ivan Valentinovich, Aydar Razinovich Gabdullin, Oleg Vasilievich Korepin, Sergey Stanislavivich Dubitskit, Sergey Vladimirovich Novikiv, and Sergey Victorovich Feklenkov. "Construction of a Multipurpose Exploration Well in the Jurassic Deposits Subsequent Transfer to Production Enabled by Metal Expandable Barrier Installed Behind the Casing." In SPE Russian Petroleum Technology Conference. SPE, 2021. http://dx.doi.org/10.2118/206439-ms.

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Summary The resource base of the north of the West Siberian oil and gas province is the basis of Russia's energy strategy. Among the northern territories of the province, the Nadym-Purskaya, Pur-Tazovskaya and Yamal oil and gas regions (OGRs) are the leaders in terms of estimated gas reserves (Figure 1). However, the largest deposits of the first two OGRs are in the stage of falling production. Therefore, the main prospects should be associated with the Yamal OGR, which has not yet been put into active operation. It is logical that along with the development of traditional methods of extraction of "dry" natural gas, the government of the Russian Federation has approved a plan for the production of liquefied natural gas based on the fields of the Yamal Peninsula, which is currently being actively implemented by PJSC "NOVATEK". (https://www.novatek.rU/m/business/exploration/)
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Oifoghe, Stanley, Ikenna Obodozie, and Lucrecia Grigoletto. "Application of Acoustic Impedance and Reflectivity in Reservoir Characterization." In SPE Nigeria Annual International Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/207077-ms.

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Abstract Well log analysis is one of the methods for reservoir characterization, in the oil and gas industry. Logs are used for subsurface formation evaluation. They are useful in hydrocarbon zone identification and volume calculation. Interpretation of well log involves sequential steps, which are lithology, shale volume, porosity and saturation determination. It is unwise to analyze well log without following the logical steps, as this could introduce errors in the result. Petrophysical and Geomechanical properties are two classes of properties for reservoir characterization. The computed volume of shale in the reservoir was 10%, the average water saturation was 30%, and the average porosity was 25pu. The bulk density decreased from 2.15g/cc to 1.95g/cc and there is a considerably lower acoustic impedance in the hydrocarbon bearing sands. In challenging reservoirs, where traditional petrophysical methods do not give definitive results, the use of geomechanical methods will improve interpretation certainty and help to clear doubts in the interpreted results.
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Ryu, Sam, Carmela Chaney, Wei Xu, Amanda Hill, Yifei Zeng, Amitava Guha, Wei Sun, et al. "Intelligent Deepwater Advanced Solutions Hub for Value Maximization Throughout Asset Lifecycle." In ADIPEC. SPE, 2022. http://dx.doi.org/10.2118/211453-ms.

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Abstract The challenges with life-cycle management of an offshore asset, coupled with multi-discipline system engineering, and multiple competing project objectives provide an opportunity to seek a disruptive approach for maximizing value. The objective of this paper is to introduce ExxonMobil's new approach called intelligent Deepwater Advanced Solutions Hub (iDASH) where various engineering tools are strategically integrated to maximize value and improve decision quality utilizing advantages of latest digital technologies. Establishing a cloud-based centralized hub with engineering tools that can generate holistic solutions is a novel and disruptive approach given the unique and complex nature of large-scale development and management of deepwater resources. As the energy industry goes through a challenging situation where more complex and competing objectives exist, the proposed iDASH can provide a new and unique approach to move in the right direction by leveraging integrated tools and data-driven technologies. Offshore developments require a wide range of expertise areas including reservoir, wells, flow assurance, subsea, flowlines, risers, topsides, marine, geotechnical, costing, and project economics. Key challenges to asset life-cycle management include uncertainty from subsurface, limited number of alternative concepts, slow evaluation turn-around time, inability to integrate processes across multiple disciplines, and non-streamlined data transfer among different stages of a project. The iDASH approach proposes solutions by emphasizing the integration of tools, continuity among different stages of a project, and cross-discipline connectivity. Logically following typical project stages, iConcept, iDesign, iOperate, and iDecom are addressed as four pillars of iDASH to ensure value maximization. Locating and integrating various engineering tools in a cloud-based centralized hub allows for cross-discipline collaboration, optimization, and faster cycles with either better solutions or multiple alternative options. Progress in this space can decrease capital expenditure (CAPEX) or increase net present value (NPV), resulting in faster monetization of an asset or a shorten payback time. Specific use cases and proofs of concept with different engineering tools demonstrate the feasibility of iDASH and value maximization. Specifically, a trade-space analysis for improving decision quality seeking an optimal concept is demonstrated as an iConcept tool. A riser optimization case is demonstrated as an iDesign tool. A mooring integrity checker is illustrated as an iOperate tool. Results validate that challenges in asset life-cycle management can be overcome and that the proposed disruptive approach offers quick, logical, strategic, and insightful means for managing the value maximization of an asset.
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Cunha, J. C., J. Eric Bickel, Luis Mendoza, Jeremy Walker, Ellen Coopersmith, and Craig A. McKnight. "A Tool for Improving Decision Quality on Upstream Consortia." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207849-ms.

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Abstract This article aims to provide a guideline to better decision quality on multi-company upstream projects. The scope is to provide a high-level overview of what should be included in a decision quality process, when companies with different levels of ownership and influence on the decision-making process naturally tend to have different approaches towards risks and decision management. It is well known in our industry that there is a predominance of multicompany participation in these projects and the paper will provide guidelines that will ultimately provide better decision quality and participant's alignment. Normally high-risk upstream projects have multi-company ownership. However, it has been noticed that companies tend to face decision management differently, which causes unnecessary delays on budget approvals and even operational timeline. Procedures to normalize the definition of an initial decision frame and creation of solutions based on a good set of alternatives are paramount to facilitate discussions and drive final recommendations. In summary, companies’ alignment on decision-making processes is key to quality, speed, and effectiveness of those decisions and critical to project success. Alignment between partners on pivotal decisions can significantly improve project delivery. The main results are practical guidelines for generating (a) decision framing, (b) strategies, (c) alternatives and potential consequences, and (d) logical analysis, partners’ alignment and commitment to action.
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Loktyev, Valentyn, Sanzhar Zharkeshov, Oleg Gotsynets, Oleksandr Davydenko, Mikhailo Machuzhak, Kuzmenko Pavlo, Vitalii Repryntsev, and Oksana Kabatova. "Modern Analogues of Sedimentation of Lower Permian Reservoirs in the Dnieper-Donets Depression." In SPE Eastern Europe Subsurface Conference. SPE, 2021. http://dx.doi.org/10.2118/208505-ms.

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Abstract The paper considers the problematics of identifying proper analogues for understanding carbonate and clastic reservoir distribution and prediction in the Lower Permian and Upper and Lower Carboniferous within the Dnieper-Donets basin. The focus of the exploration team was finding meandering rivers. This choice was proven good in mapping reservoirs and finding traps deeper in the Upper and Middle Carboniferous, although for Permian clastic section the approach was not helpful. The second option was desert dunes, but poor sorting of reservoirs suggests a more complex picture. Analogues such as desert environment is quite logical for describing Lower Permian as aridic climate, with red and brown shales and sands. Lower Permian reservoirs have a moon-like shape in the vertical sections that could be easily mistaken for river channels, but in such a dry climate, it is very likely water flow channels with sporadic hurricane-related activities. Core and logs shows chaotic grain sizes, but more with fine grains with almost no coarse grains. The source of sedimentary material could be mountains of Ukrainian Rock Shield from the South and Voronezh massif from the North. This conceptual model is proposing not to look for meandering channels, but more for braided channels with poorly sorted material. The current time analogue could be the Oman desert between the mountains and peninsula. From satellite images, braided channels are clearly visible in the direction towards the Indian Ocean. The channels’ internal structure is quite heterogeneous. This method suggests exploration targets with possible widths of the channels as big as hundreds of meters and their lengths under 10 and between 10-20 kilometres maximum.
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Ramirez, Alberto, Damir Basic, Josh Merritt, Karen Olson, and Mary Van Domelen. "Automating a Breakthrough Technology for Real-Time Diagnostics: Sealed Wellbore Pressure Monitoring." In SPE Hydraulic Fracturing Technology Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/209161-ms.

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Abstract The upstream oil and gas industry has seen its share of innovation over the past several decades. The driving force behind these changes has always been a relentless push toward operational and capital efficiency. A breakthrough patented pressure diagnostic technique using offset sealed wellbores as monitoring sources was introduced at the 2020 Hydraulic Fracturing Technology Conference (Haustveit et al. 2020). This technique quantifies various hydraulic fracture parameters using only a surface gauge mounted on the sealed wellbore. The authors successfully automated the Sealed Wellbore Pressure Monitoring (SWPM) analysis procedure using a cloud-based analytical platform (CBAP) designed to ingest, process, and analyze high-frequency hydraulic fracturing data (Iriarte et al. 2021b). The minimum data for the analysis consists of the standard frac treatment data combined with the high-resolution pressure gauge data for each sealed wellbore. The team developed machine learning algorithms to identify the key events required by a sealed wellbore pressure analysis: the start, end, and magnitude of each pressure response detected in the sealed wellbore while actively fracturing offset wells. The result is a rapid, repeatable SWPM analysis that minimizes individual interpretation biases. Since then, over 10,000 stages have been analyzed with SWPM in every major North and South American unconventional basin. The next logical step in the process was to move from post-treatment to real-time analyses. This required an extensive data set to train the real-time models. The training data set includes two types of data: active well data including treating pressures and slurry rates for 1000+ stages from all major North American basins; and 2500+ hours of monitoring well pressure and temperature data streams. The authors use signal processing techniques to mitigate noise, easily accommodate business rules, and follow the subject matter experts’ decision logic. The data is combined with high-resolution pressure gauge data. Machine learning algorithms were developed to identify the start, end, and magnitude of each pressure response detected in the sealed wellbores while actively fracturing offset wells. The model updates its predictions as new data are collected, generating predictions every few seconds on average. The length of the streaming window analyzed by the model and the frequency of the analysis can be modified to accommodate a variety of internet and streaming conditions. This approach provides a robust, automated, and extremely performant model that easily accommodates operating constraints. Real-time cloud-based streaming paired with machine learning allows much easier decision making on-the-fly. Moreover, the proposed methods are designed so that real-time updates can be done efficiently. One of the benefits of real-time data is the ability to manage by exception. Using alerts that are triggered by customizable thresholds, remote engineers can be aware of any operational issues. Closely evaluating sealed wellbore pressure responses to changing completion designs in an active well allows further optimization of the completion process along with creating opportunities for saving costs.
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