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Artykuły w czasopismach na temat "Absolute Potentiality"
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Mariod, Abdalbasit Adam, i Suzy Munir Salama. "The Efficacy of Processing Strategies on the Gastroprotective Potentiality of Chenopodium quinoa Seeds". Scientific World Journal 2020 (28.05.2020): 1–16. http://dx.doi.org/10.1155/2020/6326452.
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The current study has been conducted to evaluate the effect of different processing techniques on the 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging capacity and the gastroprotective potential of Chenopodium quinoa red seeds in acute gastric injury induced by absolute ethanol in rats. Seven groups of female Sprague Dawley rats were assigned to normal and absolute ethanol (absolute EtOH) groups, given distilled water, reference control omeprazole (OMP, 20 mg/kg), pressure-cooked quinoa seeds (QP, 200 mg/kg), first stage-germinated quinoa seeds (QG, 200 mg/kg), Lactobacillus plantarum bacteria-fermented quinoa seeds (QB, 200 mg/kg), and Rhizopus oligosporus fungus-fermented quinoa seeds (QF, 200 mg/kg). One hour after treatment, all groups were given absolute ethanol, except for the normal control rats. All animals were sacrificed after an additional hour, and the stomach tissues were examined for histopathology of hematoxylin and eosin staining, immunohistochemistry of cyclooxygenase 2 (COX-2), and nitric oxide synthase (iNOS). Stomach homogenates were evaluated for oxidative stress parameters and prostaglandin E2 (PGE2). Gene expression was performed for gastric tumor necrosis factor alpha (TNF-α) and nuclear factor kappa of B cells (NF-kB). QB and QG recorded the highest DPPH scavengers compared to QF and QP. The gastroprotective potential of QB was comparable to that of OMP, followed by QF, then QG, and QP as confirmed by the histopathology, immunohistochemistry, and gene expression assessments. In conclusion, differently processed red quinoa seeds revealed variable antioxidant capacity and gastroprotective potential, while the bacterial fermented seeds (QB) showed the highest potential compared to the other processing techniques. These results might offer promising new therapy in the treatment of acute gastric injury.
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Baumgartner, Brad D. "Potentiality of the Present: Exploring Speculative Realism VIA Spatial Theory". Human Geography 5, nr 1 (marzec 2012): 36–41. http://dx.doi.org/10.1177/194277861200500104.
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In this essay, I propose a new alliance between speculative realism and spatial theory. Whether interpreted as an avant-garde movement or simply as part of an evolution in human thought, the Speculative Turn in continental philosophy has an important link to spatial studies, a field replete with the study of imaginative and speculative texts. By applying various spatial theories to this unique philosophical movement, and thereby implicating ourselves within a space where we become linked in spatial being, we can endeavor to think the absolute from a place of ‘radical contingency’ and spatiality. This analysis, then, historicizes the movement via its academic and para-academic manifestations, as it asserts a mode of remembering that invokes the loss of cultural amnesia. Thus, it demonstrates that speculative realism is a good candidate for further critical inquiry, but also that spatial studies, with its interdisciplinary lens often informing and creating the cultural worlds we inhabit, is a good candidate for speculative realism to cast its exploratory vision.
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DAI, Z. N., J. C. Soares i M. F. Silva. "POTENTIALITY OF PIXE TO MEASURE MULTILAYER FILM THICKNESS THROUGH COMPUTER SIMULATION". International Journal of PIXE 07, nr 03n04 (styczeń 1997): 277–85. http://dx.doi.org/10.1142/s012908359700031x.
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In this paper a method concerning the measurement of film thickness using PIXE analysis through computer simulation is described. Because of continuously decreasing cross sections for X-ray production by irradiation with the decreasing energy of the incident beam, PIXE has some potentiality to measure film thickness through computer simulation. Ratio of intensities of X-rays of two different elements is sensitive to the changes of energy and geometrical parameters, therefore by changing ion beam energy or the geometrical parameters, we can determine the film thickness to a good accuracy. This method doesn't require any kind of absolute calibration of experimental parameters, as only the ratios of X-ray intensities are taken into consideration. Therefore the inaccuracy in the procedure is only of statistical origin. A titanium film on molybdenum substrate is used as an example of the method. Preliminary result on a very thin Cr/Nd/Fe multilayer film on silicon substrate is presented to show the advantages and possible use of the method. More complex samples, such as multilayer samples with several elements in each layer, can be dealt with the same means too.
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Aliaiev, G. E., i A. S. Tsygankov. "SIMON L. FRANK: LIFE AND DOCTRINE". RUDN Journal of Philosophy 23, nr 2 (15.12.2019): 172–91. http://dx.doi.org/10.22363/2313-2302-2019-23-2-172-191.
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The article discusses major biographical milestones and provides a general evolution of philosophical views of the Russian philosopher Simon L. Frank. At the initial stage of the creative way, Frank is an economist and critical Marxist. Appeal to philosophy in the 1900s characterized by the influence of neo-Kantianism, the immanent philosophy and philosophy of life. Around 1908-12 Frank’s transition to the position of metaphysics begins to take shape his own philosophical system, absolute realism. One of the main features of the work of Frank is consistency. Throughout his creative career, the philosopher developed the deepened and detailed original philosophical intuition - the intuition of the supra-rational unity of being - which was already fixed in his early philosophical works. Absolute being is a concrete metalogical reality, revealed in the living knowledge Simultaneously, the potentiality and transfiniteness of absolute being acts as the basis of individuality and creativity of man, the source of his freedom. The philosophical method of Frank, rational comprehension of rationally incomprehensible, based on the principle of antinomic monodualism. Philosophy of religion unfolds as a phenomenological analysis of religious experience. In the social political field Frank justifies the position of liberal conservatism and Christian realism.
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Calero Hurtado, Alexander, Elieni Quintero Rodríguez, Yanery Pérez Díaz, Janet Jiménez Hernández i Iván Castro Lizazo. "Association between AzoFert® and efficient microorganism potentiates the growth and productivity of beans". Revista de la Facultad de Agronomía, Universidad del Zulia 37, nr 4 (15.09.2020): 387–409. http://dx.doi.org/10.47280/revfacagron(luz).v37.n4.04.
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To evaluate the association between AzoFert® and efficient microorganisms (EM) in the morphological and productive response of common bean in three sowing season, three experiments were developed at the Collective farmer "Martires de Taguasco", Sancti Spíritus, Cuba, from September 2014 to April 2015. The treatments evaluated were the absolute Control: without inoculating and without fertilizing, foliar applications of EM (100 mg.L-1), inoculation of the seeds with AzoFert® (108 cfu.g-1) and the associate between AzoFert® + EM. The indicators evaluated were: the height of the plants (cm), the number of leaves per plant, legumes per plant, grains per plant, mass of 100 grains (g) and yield (t.ha-1). The results showed that the treatments with EM, AzoFert® and the association between AzoFert® + EM achieved higher responses of the morphological and productive indicators on the intermediate sowing period (EI) in comparison to early (ET) and late season (EA). The AzoFert® + EM association treatments showed better performance compared with the individual application of EM and AzoFert® also increase the indicators evaluated and the yield was higher ~102 % in early season, ~113 % in the intermediate and 111 % in the late season in relationship to absolute control. The findings established the potentiality of the association of AzoFert® + ME as an efficient alternative to increase bean productivity and could potentially lead to sustained increase in crop yield.
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Taschin, Andrea, Paolo Bartolini, Jordanka Tasseva, Jana Striova, Raffaella Fontana, Cristiano Riminesi i Renato Torre. "Drawing materials studied by THz spectroscopy". ACTA IMEKO 6, nr 3 (27.09.2017): 12. http://dx.doi.org/10.21014/acta_imeko.v6i3.447.
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THz time-domain spectroscopy in transmission mode was applied to study dry and wet drawing inks. In specific, cochineal-, indigo- and iron-gall based inks have been investigated; some prepared following ancient recipes and others by using synthetic materials. The THz investigations have been realized on both pellet samples, made by dried inks blended with polyethylene powder, and layered inks, made by liquid deposition on polyethylene pellicles. We implemented an improved THz spectroscopic technique that enabled the measurement of the material optical parameters and thicknesses of the layered ink samples on absolute scale. This experimental investigation shows that the THz techniques have the potentiality to recognize drawing inks by their spectroscopic features.
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Denkova, Lidia. "Heart and Ashes – the ‘Next’ Ciphers". Sledva : Journal for University Culture, nr 40 (7.04.2020): 6–13. http://dx.doi.org/10.33919/sledva.20.40.2.
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The question “What next?” is a key one to all philosophical theories that consider causality, continuum, discontinuity, potentiality, and, more generally, probability. The notion of "cause" (aitia) and the rigid causality are based on what was said in the Fifth Book of Aristotle's Metaphysics, but ancient atomists, especially Plato, introduced the possibility of free "bifurcation of consequences", of symmetry and asymmetry of "next", which commence from an absolute new beginning. The principle of an absolute new beginning follows the interpretation of the myth of the deluge in De sapientia Veterum (1609) by Francis Bacon. The "logical pluralism" of numerous cause and effect relationships as well as the continuity principle (as formulated by Leibniz) are encompassed in two ciphers in accordance with the classical definition of cipher by Karl Jaspers. The cipher “sameness” and the cipher “change” suggest that we ask ourselves once again about Aristotle's "probable impossibility", and the starting point is the little-known myth of Dionysus, torn to pieces and restored to a new body thanks to his heart, as well as the creation of humanity from the ashes of the stricken Titans.
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De Miranda, Luis. "Think Into the Place of the Other". International Journal of Philosophical Practice 7, nr 1 (2021): 89–103. http://dx.doi.org/10.5840/ijpp2021717.
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The present article introduces eight empirically-tested concepts that guide the crealectic practice of philosophical counseling: philosophical health, deep listening, the Creal, the possible, imparadisation, deep orientation, eudynamia , and mental heroism. The crealectic framework is grounded on a process-philosophy axiom of absolute possibility and continuous cosmological and cosmopolitical creation, termed "Creal". The approach also posits that there are three complementary modes of intelligence, namely analytic, dialectic, and crealectic, the balance of which is necessary to live a healthy human life. Beyond what is physically possible and psychologically possible, an underestimated force of social and personal deployment is the philosophical possible . In a context of personal counseling and philosophical care, the crealectic approach endeavors to slowly connect the patient to a field of harmonious and generative potentiality termed eudynamia.
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Arabameri, Alireza, Jagabandhu Roy, Sunil Saha, Thomas Blaschke, Omid Ghorbanzadeh i Dieu Tien Bui. "Application of Probabilistic and Machine Learning Models for Groundwater Potentiality Mapping in Damghan Sedimentary Plain, Iran". Remote Sensing 11, nr 24 (14.12.2019): 3015. http://dx.doi.org/10.3390/rs11243015.
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Groundwater is one of the most important natural resources, as it regulates the earth’s hydrological system. The Damghan sedimentary plain area, located in the region of a semi-arid climate of Iran, has very critical conditions of groundwater due to massive pressure on it and is in need of robust models for identifying the groundwater potential zones (GWPZ). The main goal of the current research is to prepare a groundwater potentiality map (GWPM) considering the probabilistic, machine learning, data mining, and multi-criteria decision analysis (MCDA) approaches. For this purpose, 80 wells collected from the Iranian groundwater resource department and field investigation with global positioning system (GPS), have been selected randomly and considered as the groundwater inventory datasets. Out of 80 wells, 56 (70%) wells have been brought into play for modeling and 24 (30%) for validation purposes. Elevation, slope, aspect, convergence index (CI), rainfall, drainage density (Dd), distance to river, distance to fault, distance to road, lithology, soil type, land use/land cover (LU/LC), normalized difference vegetation index (NDVI), topographic wetness index (TWI), topographic position index (TPI), and stream power index (SPI) have been used for modeling purpose. The area under the receiver operating characteristic (AUROC), sensitivity (SE), specificity (SP), accuracy (AC), mean absolute error (MAE), and root mean square error (RMSE) are used for checking the goodness-of-fit and prediction accuracy of approaches to compare their performance. In addition, the influence of groundwater determining factors (GWDFs) on groundwater occurrence was evaluated by performing a sensitivity analysis model. The GWPMs, produced by technique for order preference by similarity to ideal solution (TOPSIS), random forest (RF), binary logistic regression (BLR), weight of evidence (WoE) and support vector machine (SVM) have been classified into four categories, i.e., low, medium, high and very high groundwater potentiality with the help of the natural break classification methods in the GIS environment. The very high groundwater potentiality class is covered 15.09% for TOPSIS, 15.46% for WoE, 25.26% for RF, 15.47% for BLR, and 18.74% for SVM of the entire plain area. Based on sensitivity analysis, distance from river, and drainage density represent significantly effects on the groundwater occurrence. validation results show that the BLR model with best prediction accuracy and goodness-of-fit outperforms the other five models. Although, all models have very good performance in modeling of groundwater potential. Results of seed cell area index model that used for checking accuracy classification of models show that all models have suitable performance. Therefore, these are promising models that can be applied for the GWPZs identification, which will help for some needful action of these areas.
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Hewitt, George. "Conditional and Other Functions of Forms in /-(zα(.))r/ in Abkhaz". Iran and the Caucasus 12, nr 1 (2008): 57–71. http://dx.doi.org/10.1163/157338408x326208.
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AbstractProtases ('if'-clauses) in the North West Caucasian language Abkhaz are mostly marked by either /-r/ or /-zα.r/, depending on the tense and/or type of verb (Stative or Dynamic) concerned. The article presents examples of this conditional usage and the role of protasis-type forms in both temporal and interrogative expressions as well as in complementiser-function. The complementisers in question share the semantic feature of irrealis with conditionals. A rhotic element is also found in the non-finite form of the Future I tense, in the Masdar (verbal noun), and in such converbs as the Purposives, the Resultative and the Future Absolute. The article attempts to link the semantic notions of futurity, potentiality, indefiniteness or general irrealis to the rhotic element and asks what might have been the historical development resulting in the forms attested today and thus their original morphological segmentation.
Rozprawy doktorskie na temat "Absolute Potentiality"
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Chan, Patrick Foong, i patrick chan@rmit edu au. "Outside-Singapore: A Practice of Writing: Making Subjects and Spaces yet to come". RMIT University. Architecture and Design, 2007. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080205.164909.
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Malinski, Tania Alexandra. "O conceito de desenvolvimento segundo Hegel: a progressão da consciência". Universidade Federal de São Carlos, 2012. https://repositorio.ufscar.br/handle/ufscar/4793.
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Previous issue date: 2012-03-21The present thesis defends that Hegel´s dialectic can be understood as a process of development, both from the standpoint of pure reason and from a perspective based on historical and political factors. The dialectic of the concept is a development of the consciousness of being with relation to an object so as to comprehend the universal content of the object. The preservation of what is in opposition in the dialectical synthesis is the nucleus of the idea of development and what gives it a positive, constructive and directional character as philosophical and historical process. From a strictly rational point of view, development is the progression of consciousness. From a historical perspective, development is the progressive manifestation of spirit, or Geist. Both means of development consolidate themselves with the enunciation of the concept, which envelops an internal and subjective determination as well as a normative element. The philosophical law contained in the concept reveals its intrinsic value and its comprehension becomes a constitutive part of being. The determination in terms of rule of law and moral values is the absolute determination towards which is driven the national spirit.
A presente tese defende a leitura da dialética de Hegel como um processo de desenvolvimento, tanto do ponto de vista racional quanto histórico e político. A dialética do conceito seria um desenvolvimento da consciência do sujeito com relação ao objeto de modo a apreender o conteúdo universal do objeto. A preservação do que é contrário na síntese dialética seria o núcleo da idéia de desenvolvimento, conferindo um caráter positivo, construtivo e direcional ao processo filosófico e histórico. Do ponto de vista estritamente racional, o desenvolvimento seria a progressão da consciência. Do ponto de vista histórico, o desenvolvimento seria a progressiva manifestação do espírito, ou Geist. Ambas instâncias de desenvolvimento se consolidam com a formação do conceito, que encerra em si um elemento de critério interno ao sujeito assim como um elemento normativo. A lei filosófica encerrada no conceito revela o valor intrínseco e seu conhecimento passa a ser atividade constitutiva do ser. A lei jurídica ou moral seria a enunciação do valor absoluto ao projeto do espírito nacional.
Książki na temat "Absolute Potentiality"
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Taberlet, Pierre, Aurélie Bonin, Lucie Zinger i Eric Coissac. The future of eDNA metabarcoding. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198767220.003.0019.
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Environmental DNA-based research is undergoing rapid developments, but its democratization in basic and applied research remains hampered by the biases introduced by molecular approaches, the difficulties in estimating absolute organisms’ abundances, and a lack of general consensus in molecular protocols. Chapter 19 “The future of eDNA metabarcoding” provides an overview of these current challenges and discusses how shotgun sequencing, capture-based methods, inclusion of internal standards, and development of new data repositories could alleviate these limits and facilitate cross-experiments comparisons. This chapter finally turns to open questions on the potentiality of new sequencing methods and proposes directions to improve biodiversity estimates and ecological inferences and predictions from eDNA data, and ultimately stimulate further developments and integration of eDNA metabarcoding into academic and operational ecological research and monitoring.
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Dokko, Gina, i Winnie Jiang. Managing Talent across Organizations. Redaktorzy David G. Collings, Kamel Mellahi i Wayne F. Cascio. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780198758273.013.11.
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What do talented employees carry with them as they move across organizations? How portable are their expertise, resources, and performance? As organizations’ needs for talent grow and individuals’ career trajectories become increasingly diverse, these questions become more important. In this chapter, we draw from career-mobility research and develop a framework that considers the human capital, social capital, and identity issues in talent movement. We also provide implications for organizations as talent enters and exits an organization. In sum, we suggest that intake of talent per se does not necessarily lead to successful acquisition and utilization of the talent’s capital. Conversely, departure of talent does not mean an absolute loss to organizations—losing talent can potentially bring organizations unexpected gains, such as new social resources.
Części książek na temat "Absolute Potentiality"
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Das, Saitya Brata. "Exception without Sovereignty". W Nothing Absolute, 207–22. Fordham University Press, 2021. http://dx.doi.org/10.5422/fordham/9780823290161.003.0012.
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This chapter argues that the later Schellingian idea of “actuality without potentiality” opens up, eschatologically, to a thinking of exception without sovereignty. This idea of “actuality without potentiality,” whose genesis is already visible in his earlier works, is Pauline in spirit and inspiration: It draws on the idea of kenosis that Paul develops in his letter to the Philippians (2:7). Schelling thinks of the event of actuality as emptying out of potentialities that constitute the nomothetic order of worldly hegemonies. It is the contention of this paper that such a kenotic eschatology of Schelling offers us a radical critique of sovereignty, and contributes elements of a “negative political theology” which is based upon an event of exception without sovereignty.
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Sharvit, Gilad. "Moses and the Burning Bush: Leadership and Potentiality in the Bible". W Freud and Monotheism. Fordham University Press, 2018. http://dx.doi.org/10.5422/fordham/9780823280025.003.0010.
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This chapter discusses Freud’s depiction of Moses as an absolute monarch in Moses and Monotheism. The argument is that the portrayal of Moses as a tyrannical ruler essentially obscures a much more nuanced representation of Moses in the bible, as introduced in the scene of the Burning Bush, where Moses was not domineering nor demanding, but rather, suffered under the imperious demands of God. The analysis of the interaction of Moses with God borrows several concepts from Agamben’s theory of potentiality to argue that in contrast to the despotic Moses of Freud, the biblical Moses symbolizes the human struggle for impotentiality and freedom.
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Leunissen, Mariska. "The Route to Solving the Eleatic Puzzle". W Aristotle's Physics Alpha, 286–301. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198830993.003.0010.
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This chapter analyses Aristotle’s solution to the infamous ‘old Eleatic problem’ about coming to be and passing away. According to Aristotle, the ‘old philosophers’ got off track due to their inexperience and concluded that since nothing can come to be from what is, since it already is, and since nothing can come to be from what is not, there is no generation at all and also no plurality of things. Aristotle’s solution involves making the right kind of conceptual distinctions, first, in terms of what it means for something to come to be from what is or from what is not qua what it is or qua what it is not, and second, by distinguishing coming to be in an accidental and in an absolute way. Aristotle concludes by solving again the same problem via a different method, namely by distinguishing between coming to be in actuality and in potentiality.
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Bell, David A. "The Culture of War in Europe, 1750–1815". W The Crisis of the Absolute Monarchy. British Academy, 2013. http://dx.doi.org/10.5871/bacad/9780197265383.003.0008.
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This chapter examines the development of the ‘culture of war’ in Europe, focusing on France, from the Old Regime through the First Empire. It argues that before the Revolution, French aristocratic elites saw warfare as an ordinary part of human existence — and indeed, if kept under proper control, a positive and desirable one. It then shows how this idea was challenged during the Enlightenment, by critics who saw warfare as extraordinary and aberrant, with some deeming it extraordinarily horrible, and others depicting it, at least potentially, as extraordinarily sublime and regenerative. The chapter discusses how these conflicting ideas helped to shape the actual practice and course of the revolutionary and Napoleonic wars, looking particularly at the question of why these wars proved so terribly difficult to control, restrain, and bring to an end.
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Will, Nicholas D., i W. Brian Beam. "Central Line Placement". W Mayo Clinic Critical and Neurocritical Care Board Review, redaktorzy Eelco F. M. Wijdicks, James Y. Findlay, William D. Freeman i Ayan Sen, 890–91. Oxford University Press, 2019. http://dx.doi.org/10.1093/med/9780190862923.003.0123.
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Central venous catheter placement is one of the most commonly performed procedures in the intensive care unit. Common indications for central venous catheter placement include the need for vasoactive or caustic medication infusions, vascular access in patients with poor peripheral veins, long-term access for intravenous medications, infusion of parenteral nutrition, hemodynamic monitoring, transvenous cardiac pacing, and access for hemodialysis or plasmapheresis. There are no absolute contraindications to central venous catheter placement because it is a potentially lifesaving intervention, but careful planning and site selection are warranted in some cases, such as a patient with a known coagulopathy.
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Diaz-Gomez, Jose L., i Sarah W. Robison. "Nasopharyngeal and Oropharyngeal Decontamination to Prevent Nosocomial Infection in Cardiac Surgery Patients". W 50 Studies Every Intensivist Should Know, redaktorzy Edward A. Bittner i Michael E. Hochman, 282–86. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190467654.003.0046.
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Preventing nosocomial infections is important to improve postoperative outcomes for cardiac surgery patients. The patient’s own flora is thought to be the primary source of potentially pathogenic bacteria. Therefore, decontamination is an appealing preventative strategy for reducing nosocomial infections. This study investigated the use of topical chlorhexidine gluconate for perioperative nasal and oropharyngeal decontamination in cardiac surgery patients. The intervention resulted in a significant reduction in lower respiratory tract infections, deep surgical site infections, use of nonprophylactic antibiotics, and duration of hospitalization. There was an absolute risk reduction in total nosocomial infection of 6.4%; 16 patients would have to be treated with the chlorhexidine decontamination strategy to prevent one nosocomial infection. Chlorhexidine is an advantageous antimicrobial because it has broad-spectrum coverage, is inexpensive, and is very well tolerated.
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Kalder, Matthias, i Karel Kostev. "Epidemiology of Gynaecological and Breast Cancers". W Handbook of Research on Oncological and Endoscopical Dilemmas in Modern Gynecological Clinical Practice, 1–21. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-4213-2.ch001.
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This chapter describes the incidences of breast cancer, genital organ cancer, in particular cervical cancer and ovarian cancer, including the five-year survival rates among women with these cancer diagnoses. Additionally, these incidences will be presented from different countries of the world. The absolute five-year survival rate indicates how many cancer patients are still alive at a certain point after diagnosis. Moreover, the age structure of women with cancer in Germany is shown. Additionally, anxiety and depression are common comorbidities of cancer and will serve in this chapter to give an example of applied epidemiology. These two conditions result from the uncertain course of the cancer disease, reduced life expectancy, and profound life changes. The impact of breast cancer or genital organ cancer on mental health is described, and it is shown which psychiatric diagnoses and symptoms potentially will occur during the course of the cancer disease.
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Jones, Quentin, i Sukeshini A. Grandhi. "Supporting Proximate Communities with P3-Systems". W The Interaction Society, 215–50. IGI Global, 2005. http://dx.doi.org/10.4018/978-1-59140-530-6.ch009.
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In this chapter we examine systems that link People-to-People-to-geographical-Places, which we label P3-Systems. Four major P3-Systems design approaches have been identified by an analysis of systems prototyped to date: (1) People Centric P3-System design that use absolute user location, based on awareness of where somebody is located (e.g., Active Badge); (2) People Centric P3-System design based on user co-location/proximity (e.g., Hocman); (3) Place Centric P3-System design based on the use of virtual spaces that contain representations of user’s use of physical spaces (e.g., ActiveMap); and (4) Place Centric P3-System design based on the use of virtual spaces that contain online interactions related to physical location (e.g., Geonotes). This chapter explores how proximate community member interactions can potentially be well supported by P3-Systems through the improved geographical contextualization and coordination of interactions and the identification of previously unidentified location based affinities between community members.
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Brower, Andrew V. Z., i Randall T. Schuh. "Understanding Molecular Clocks and Time Trees". W Biological Systematics, 326–37. Cornell University Press, 2021. http://dx.doi.org/10.7591/cornell/9781501752773.003.0011.
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This chapter examines molecular clocks and time trees. Although laden with numerous process assumptions that may or may not be true (or knowable), the idea is appealingly straightforward: if amino acid substitutions in proteins occurred at a relatively steady pace that were more or less constant both over time and along each of the branches of a diverging evolutionary tree, then the number of substitutions would be directly related to the time since the taxa in question diverged from one another. However, evidence does not support a universal molecular clock. Evidence might or might not support “local” clocklike evolution among closely related taxa over relatively short time spans. Although absolute minimum ages for clades may be inferred from fossils, from biogeographical patterns, or extrapolated from secondary calibrations, such age estimates are subject to potentially significant error due to vagaries of geological dating as well as ambiguities of fossil identity. The test of a time tree hypothesis is to discover new fossil evidence that corroborates or falsifies it.
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Anable, Jillian, i Christian Brand. "Energy, pollution and climate change". W Transport Matters, 55–82. Policy Press, 2019. http://dx.doi.org/10.1332/policypress/9781447329558.003.0003.
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Despite decades of focus on energy efficiency and technical solutions for vehicles and fuels, the transport sector is a large and growing contributor to the climate crisis alongside other serious environmental consequences attributed to the combustion of fossil fuel. Vehicle efficiency improvements have failed to outpace the demand for the distance travelled and have therefore failed to result in absolute reductions in energy used. This chapter takes stock at this pivotal point among a constellation of so-called transport ‘revolutions’ and ponders the need to reframe the core concept of ‘energy efficiency’ if it is to be a useful focal point for sustainable action in this sector. The core contention is that the goal of energy efficiency has become so embedded in the discourses attached to low carbon transport that it has crowded out discussion of any unintended consequences or, most importantly, where we want the taken-for granted efficient and decarbonised pathways to ultimately lead. An alternative framework is proposed which opens the debate around whether levels of mobility demand are themselves unsustainable and consistent and meaningful efforts to manage demand based on notions of ‘sufficiency’ might be a more effective and potentially equitable route to lower energy demand.
Streszczenia konferencji na temat "Absolute Potentiality"
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Galdo Vega, Mónica, Jesus Manuel Fernandez Oro, Katia María Argüelles Díaz i Carlos Santolaria Morros. "Effect of Rotor-Stator Configuration in the Generation of Vortical Scales and Wake Mixing in Single Stage Axial Fans: Part I — LES Modelling and Experimental Validation". W ASME 2013 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fedsm2013-16432.
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The unsteadiness and vortical structures associated to impinging wakes convected through rotor and stator passages have been studied in detail in a single-stage low-speed axial fan, with 9 blades and 13 inlet/outlet guide vanes. In particular, in this first part, the effect of complementary rotor-stator (RS) and stator-rotor (SR) configurations has been addressed in terms of wake mixing and generation of vortical structures in both absolute and relative frames of reference. A LES simulation of the midspan section (in a 2.5D model) is introduced to resolved the largest scales of the vortical motion within the wakes, related to vortex shedding, especially at off-design conditions. Chopping mechanisms and periodic interactions of the coherent turbulent structures are described and the presence of turbulent spots due to wake-wake interactions is revealed. Another relevant flow pattern, like the advection of leading edge separation through the downstream passage, is also identified and linked to the periodic potential interaction of upstream vanes (SR) or blades (RS). Additionally, complete experimental databases of the time-resolved and the turbulent scales of the flow are available for both configurations by means of hot-wire anemometry measurements. Wake transport and viscous mixing are identified in corresponding measuring windows, and primary flow structures at midspan are also recovered and compared with the numerical results for validation. From the comparison of experimental and numerical results it can be concluded that the numerical modeling is able to reproduce accurately the unsteady phenomena that occur inside the axial fan, and shows the potentiality of LES techniques to resolve with high fidelity the main turbulent structures present in the flow, especially at off-design flow rates.
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Han, Yu, Mu Zhang, Weidong Zhai, Xiaofeng Chen, Nianzhi Jiao i Kai Tang. "Metatranscriptomics and Absolutely Amplicon Sequencing Reveal the Potentially Adaptive Mechanism of Microbes in the Deoxygenated Bohai Sea". W Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.945.
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Liu, Yi-Hwa, Rameshwar Prasad i Shimin Li. "Prerequisite of SPECT/CT image segmentation approach potentially leading to precise absolute quantification of myocardial focal tracer uptake: Phantom and canine validations". W 2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC). IEEE, 2014. http://dx.doi.org/10.1109/nssmic.2014.7430786.
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Manoharan, Kiran, i Santosh Hemchandra. "Absolute/Convective Instability Transition in a Backward Facing Step Combustor: Fundamental Mechanism and Influence of Density Gradient". W ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26435.
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Hydrodynamic instabilities of the flow field in lean premixed gas turbine combustors can generate velocity perturbations that wrinkle and distort the flame sheet over length scales that are smaller than the flame length. The resultant heat release oscillations can then potentially result in combustion instability. Thus, it is essential to understand the hydrodynamic instability characteristics of the combustor flow field in order to understand its overall influence on combustion instability characteristics. To this end, this paper elucidates the role of fluctuating vorticity production from a linear hydrodynamic stability analysis as the key mechanism promoting absolute/convective instability transitions in shear layers occurring in the flow behind a backward facing step. These results are obtained within the framework of an inviscid, incompressible, local temporal and spatio-temporal stability analysis. Vorticity fluctuations in this limit result from interaction between two competing mechanisms — (1) production from interaction between velocity perturbations and the base flow vorticity gradient and (2) baroclinic torque in the presence of base flow density gradients. This interaction has a significant effect on hydrodynamic instability characteristics when the base flow density and velocity gradients are co-located. Regions in the space of parameters characterizing the base flow velocity profile, i.e. shear layer thickness and ratio of forward to reverse flow velocity, corresponding to convective and absolute instability are identified. The implications of the present results on prior observations of flow instability in other flows such as heated jets and bluff-body stabilized flames is discussed.
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Knowles, Martin. "Gas Turbine Temperature Spread Monitoring Detection of Combustion System Deterioration". W ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/94-gt-189.
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Deterioration in the burners or combustion chamber of a gas turbine can result in uneven and unstable air flow and excessive temperature profiles, any of which will produce unnecessary and potentially damaging stress cycles. Detection relies on comparisons of thermocouples located circumferentially at a convenient point in the hot gas path. The techniques usually recommended by engine manufacturers compare absolute values taking no account of any initial asymmetry due to manufacturing tolerances, thermocouple positioning or turbulence of the gas flow at the measurement point. The initial profile of measured temperatures can be established empirically over the operating range and it is deviation from this profile which provides a sensitive measure of deterioration in the combustion system. This more sensitive technique provides earlier detection of impending failure. This paper reviews the normally recommended approach, presents the case for detecting departure from the footprint and looks at a case study.
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Wang, Zhe, Qilun Zhu, Robert Prucka, Michael Prucka i Hussein Dourra. "Observer Based Cylinder Air Charge Estimation for Spark Ignition Engines". W ASME 2016 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icef2016-9405.
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Spark ignition engine in-cylinder air charge estimation is important for air-to-fuel ratio control, maintaining high after-treatment efficiency, and determination of current engine torque. Current cylinder air charge estimation methodologies generally depend upon either a mass air flow (MAF) sensor or a manifold absolute pressure (MAP) sensor individually. Methods based on either sensor have their own advantages and disadvantages. Some production vehicles are equipped with both MAF and MAP sensors to offer air charge estimation and other benefits. This research proposes several observer based cylinder air charge estimation methods that take advantage of both MAF and MAP sensors to potentially reduce calibration work while providing acceptable transient and steady-state accuracy with low computational load. This research also compares several common air estimation methods with the proposed observer based algorithms using steady-state and transient dynamometer tests and a rapid-prototype engine controller. With appropriate tuning the proposed observer based methods are able to estimate cylinder air charge mass under different engine operating conditions based on the manifold model and available sensors. Methods are validated and compared based on a continuous tip-in tip-out operating condition.
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Alam, Shah Saud, i Christopher Depcik. "Verification and Validation of a Homogeneous Reaction Kinetics Model Using a Detailed H2-O2 Reaction Mechanism Versus Chemkin and Cantera". W ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10028.
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Abstract Increased black-box software use without adequate software literacy can lead to improper results and potentially disastrous consequences. Furthermore, such software is often expensive and comes with limited flexibility making it prohibitive for learning purposes. Therefore, this effort highlights the development of an adaptable, user customizable, and free open-source software tool to evaluate reaction kinetics in combustion models. Here, the software undergoes verification and validation to ensure proper operation over the intended domain of its application. The conceptual model is derived from the basic governing equations of thermodynamics simulating zero-dimensional constant pressure combustion with chemical kinetics based on a homogeneous hydrogen-oxygen reaction mechanism. Then, the computerized model is developed using a top-down programming technique for quick identification and elimination of coding errors. Operational validation occurs by comparing results with Chemkin and Cantera that reveals absolute and relative tolerances of 1E−12 and 1E−3, respectively, are sufficient for convergence at all specified initial conditions. In addition, the open-source software is computationally less intensive with average time savings of 33.69% and 48.88% versus Chemkin and Cantera, respectively. Subsequently, model results are time-shifted to the 50% fuel-burned mark and compared with experimental results for validation. This ensures that the created software is correct and useful for classroom instruction. Finally, the customizability of the open-source software instills confidence in students to develop custom chemical reaction mechanisms.
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Murray, Alexander V., Peter T. Ireland i Eduardo Romero. "An Experimentally Validated Low Order Model of the Thermal Response of Double-Wall Effusion Cooling Systems for HP Turbine Blades". W ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14603.
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Abstract Transpiration cooling represents the pinnacle of turbine cooling and is characterised by an intrinsic material porosity which achieves high internal convective cooling, and full coverage cooling films on the external surface subjected to the hot gases. Quasi-transpiration systems, such as the double-wall effusion system discussed here, attempt to replicate the cooling effect of transpiration systems. The double-wall system is characterised by a large internal wetted area providing high internal convective cooling performance, with a highly porous external wall allowing the formation of a protective film over the external surface. This paper presents a low-order thermal model of a double-wall system designed to rapidly ascertain cooling performance based solely on the geometry, solid thermal conductivity, and approximate surface heat transfer coefficients. The performance of the model is initially validated using experimental data with heat transfer coefficients for the low order model obtained from fully conjugate CFD simulations. Following this, a more controlled CFD study is undertaken with both fully conjugate and fluid only simulations performed on several double-wall geometries to ascertain both overall effectiveness and film effectiveness data. Data from these simulations are used as inputs to the low order thermal model developed and the results compared. The low order model successfully captures both the trends and absolute cooling effectiveness achieved by the various double-wall geometries. The model therefore provides an extremely powerful tool in which the cooling performance of double-wall geometries can be near instantaneously predicted during the initial design stage, potentially allowing geometry optimisation to rapidly occur prior to more in-depth, costly and time-consuming analyses of the systems being performed. This potential benefit is demonstrated via the implementation of the model with input boundary conditions obtained using empirical correlations.
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Choudhury, Sanjiban, Siddhartha Srinivasa i Sebastian Scherer. "Bayesian Active Edge Evaluation on Expensive Graphs". W Twenty-Seventh International Joint Conference on Artificial Intelligence {IJCAI-18}. California: International Joint Conferences on Artificial Intelligence Organization, 2018. http://dx.doi.org/10.24963/ijcai.2018/679.
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We consider the problem of real-time motion planning that requires evaluating a minimal number of edges on a graph to quickly discover collision-free paths. Evaluating edges is expensive, both for robots with complex geometries like robot arms, and for robots sensing the world online like UAVs. Until now, this challenge has been addressed via laziness, i.e. deferring edge evaluation until absolutely necessary, with the hope that edges turn out to be valid. However, all edges are not alike in value - some have a lot of potentially good paths flowing through them, and some others encode the likelihood of neighbouring edges being valid. This leads to our key insight - instead of passive laziness, we can actively choose edges that reduce the uncertainty about the validity of paths. We show that this is equivalent to the Bayesian active learning paradigm of decision region determination (DRD). However, the DRD problem is not only combinatorially hard but also requires explicit enumeration of all possible worlds. We propose a novel framework that combines two DRD algorithms, DIRECT and BISECT, to overcome both issues. We show that our approach outperforms several state-of-the-art algorithms on a spectrum of planning problems for mobile robots, manipulators and autonomous helicopters.
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Talmon, Arno M., i Cees van Rhee. "Test Set-Up for Irregular Vertical Hydraulic Transport in Deep Ocean Mining". W ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49375.
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The mining of scarce minerals from the sea-floor at the depths of several kilometers and bringing them to a processing plant at the ocean surface requires new techniques. Seafloor Massive Sulphide (SMS) deposits are known to have an extremely rich mineral content, and are considered technically-economically-environmentally feasible to explore. Vertical hydraulic transport is the link between the sea-floor mining and the maritime vessel where the first processing stage will take place. Clogging of any part of the vertical transport system is an absolute disaster. Fine particles are conveyed faster than coarse particles. High concentrations of fines cannot bypass high concentrations of coarse particles, hence these particle fractions accumulate, potentially blocking the pipe. Fundamental research into yet unexplored physics is necessary. Besides numerical flow simulations, it is necessary to conducted experiments on the transport over large vertical distances. Such tests aim to investigate the dynamic development of density waves consisting of different particle diameters and clogging phenomenon thereof. Different particle size fractions have to be followed in real time as they overtake each other, and change their shape, merge and segregate. It is however impossible to back-scale the prototype riser to a one-pass laboratory test set-up, but the process can be simulated by repeated flow through an asymmetric vertical pipe loop, where slurry flow in the upward leg represent vertical hoist conditions and the slurry is returned quickly via the downward leg. The particle accumulation process is allowed to take place in the upward leg whereas in the downward leg the restoring process is nearly neutralized. The development of accumulations in time (= distance traveled to the ocean surface) can be followed upon multiple passes of the solids batches through the upward leg. The novelty of the described testing method is that the essentials of fundamental processes occurring in long vertical stretches are quantified in a specially designed laboratory setup. Via subsequent implementation of the results in a numerical flow simulation, reliable transport scenarios can be delineated.