Literatura científica selecionada sobre o tema "Lie triple system"
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Artigos de revistas sobre o assunto "Lie triple system"
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Okubo, Susumu, e Noriaki Kamiya. "Jordan–Lie Super Algebra and Jordan–Lie Triple System". Journal of Algebra 198, n.º 2 (dezembro de 1997): 388–411. http://dx.doi.org/10.1006/jabr.1997.7144.
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DONG, YAN-QIN, QING-CHENG ZHANG e YONG-ZHENG ZHANG. "RESTRICTED AND QUASI-TORAL RESTRICTED LIE TRIPLE SYSTEMS". Journal of Algebra and Its Applications 11, n.º 05 (26 de setembro de 2012): 1250093. http://dx.doi.org/10.1142/s0219498812500934.
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In this paper, we first discuss the nilpotency of restricted Lie triple systems and the condition of existence of p-mappings on Lie triple systems. Second, we devote our attention to prove the uniqueness of the decomposition as a direct sum of p-ideals of a restricted Lie triple system. Finally, we study how a quasi-toral restricted Lie triple system T with zero center and of minimal dimension should be.
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Cao, Yan, Jian Zhang e Yunan Cui. "On split Lie color triple systems". Open Mathematics 17, n.º 1 (9 de abril de 2019): 267–81. http://dx.doi.org/10.1515/math-2019-0023.
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Abstract In order to begin an approach to the structure of arbitrary Lie color triple systems, (with no restrictions neither on the dimension nor on the base field), we introduce the class of split Lie color triple systems as the natural generalization of split Lie triple systems. By developing techniques of connections of roots for this kind of triple systems, we show that any of such Lie color triple systems T with a symmetric root system is of the form T = U + ∑[α]∈Λ1/∼ I[α] with U a subspace of T0 and any I[α] a well described (graded) ideal of T, satisfying {I[α], T, I[β]} = 0 if [α] ≠ [β]. Under certain conditions, in the case of T being of maximal length, the simplicity of the triple system is characterized.
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Xiao, Yunpeng, Wen Teng e Fengshan Long. "Generalized Reynolds Operators on Hom-Lie Triple Systems". Symmetry 16, n.º 3 (21 de fevereiro de 2024): 262. http://dx.doi.org/10.3390/sym16030262.
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In this paper, we first introduce the notion of generalized Reynolds operators on Hom-Lie triple systems associated to a representation and a 3-cocycle. Then, we develop a cohomology of generalized Reynolds operators on Hom-Lie triple systems. As applications, we use the first cohomology group to classify linear deformations and we study the obstruction class of an extendable order n deformation. Finally, we introduce and investigate Hom-NS-Lie triple system as the underlying structure of generalized Reynolds operators on Hom-Lie triple systems.
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Zhou, Jia, Liangyun Chen e Yao Ma. "Generalized derivations of Lie triple systems". Open Mathematics 14, n.º 1 (1 de janeiro de 2016): 260–71. http://dx.doi.org/10.1515/math-2016-0024.
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AbstractIn this paper, we present some basic properties concerning the derivation algebra Der (T), the quasiderivation algebra QDer (T) and the generalized derivation algebra GDer (T) of a Lie triple system T, with the relationship Der (T) ⊆ QDer (T) ⊆ GDer (T) ⊆ End (T). Furthermore, we completely determine those Lie triple systems T with condition QDer (T) = End (T). We also show that the quasiderivations of T can be embedded as derivations in a larger Lie triple system.
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KAMIYA, NORIAKI, DANIEL MONDOC e SUSUMU OKUBO. "A STRUCTURE THEORY OF (−1,−1)-FREUDENTHAL KANTOR TRIPLE SYSTEMS". Bulletin of the Australian Mathematical Society 81, n.º 1 (2 de outubro de 2009): 132–55. http://dx.doi.org/10.1017/s0004972709000732.
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AbstractIn this paper we discuss the simplicity criteria of (−1,−1)-Freudenthal Kantor triple systems and give examples of such triple systems, from which we can construct some Lie superalgebras. We also show that we can associate a Jordan triple system to any (ε,δ)-Freudenthal Kantor triple system. Further, we introduce the notion of δ-structurable algebras and connect them to (−1,δ)-Freudenthal Kantor triple systems and the corresponding Lie (super)algebra construction.
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Kamiya, Noriaki, e Susumu Okubo. "Symmetry of Lie algebras associated with (ε, δ)-Freudenthal-Kantor triple system". Proceedings of the Edinburgh Mathematical Society 59, n.º 1 (13 de julho de 2015): 169–92. http://dx.doi.org/10.1017/s0013091514000406.
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AbstractSymmetry groups of Lie algebras and superalgebras constructed from (∈, δ)-Freudenthal-Kantor triple systems have been studied. In particular, for a special (ε, ε)-Freudenthal–Kantor triple, it is the SL(2) group. Also, the relationship between two constructions of Lie algebras from structurable algebras has been investigated.
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Xia, Haobo. "3-Derivations and 3-Automorphisms on Lie Algebras". Mathematics 10, n.º 5 (28 de fevereiro de 2022): 782. http://dx.doi.org/10.3390/math10050782.
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In this paper, first we establish the explicit relation between 3-derivations and 3- automorphisms of a Lie algebra using the differential and exponential map. More precisely, we show that the Lie algebra of 3-derivations is the Lie algebra of the Lie group of 3-automorphisms. Then we study the derivations and automorphisms of the standard embedding Lie algebra of a Lie triple system. We prove that derivations and automorphisms of a Lie triple system give rise to derivations and automorphisms of the corresponding standard embedding Lie algebra. Finally we compute the 3-derivations and 3-automorphisms of 3-dimensional real Lie algebras.
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Zhang, Zhixue, Liangyun Chen, Wenli Liu e Ximei Bai. "The Frattini Subsystem of a Lie Triple System". Communications in Algebra 37, n.º 10 (9 de outubro de 2009): 3750–59. http://dx.doi.org/10.1080/00927870802502936.
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Ma, Lili, e Qiang Li. "Cohomology and its applications on multiplicative Hom-$ \delta $-Jordan Lie color triple systems". AIMS Mathematics 9, n.º 9 (2024): 25936–55. http://dx.doi.org/10.3934/math.20241267.
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<p>The theory of cohomologies on multiplicative Hom-$ \delta $-Jordan Lie color triple systems is given. As an application, deformations and extensions on the multiplicative Hom-$ \delta $-Jordan Lie color triple system are characterized in view of relevant cohomology.</p>
Teses / dissertações sobre o assunto "Lie triple system"
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Ricciardo, Antonio. "Lie algebras and triple systems". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8712/.
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This thesis is dedicated to the Tits-Kantor-Koecher (TKK) construction which establishes a bijective correspondence between unital Jordan algebras and shortly graded Lie algebras with Z-grading induced by an sl_2-triple. It is based on the observation that if g is a Lie algebra with a short Z-grading and f lies in g_1, then the formula ab=[[a,f],b] defines a structure of a Jordan algebra on g_{-1}. The TKK construction has been extended to Jordan triple systems and, more recently, to the so-called Kantor triple systems. These generalizations are studied in the thesis.
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Hajjaji, Atef. "Étude des opérateurs de Rota-Baxter relatifs sur les algèbres ternaires de type Lie et Jordan". Electronic Thesis or Diss., Mulhouse, 2024. http://www.theses.fr/2024MULH7172.
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L'objectif de cette thèse est d'étudier les opérateurs de Rota-Baxter relatifs sur les algèbres ternaires de type Lie et de type Jordan. L'étude porte sur leur structure, leur cohomologie, leurs déformations et leur lien avec les équations de Yang-Baxter. Ce travail est divisé en trois parties. La première partie est consacrée à l'étude de l'algèbre de contrôle des systèmes triples de Lie, et à son application à la théorie existante de la cohomologie. De plus, nous introduisons la notion d'opérateur de Rota-Baxter relatif sur les systèmes triples de Lie et construisons une 3-algèbre de Lie comme cas spécial des L∞-algèbres dont les éléments de Maurer-Cartan sont des opérateurs de Rota-Baxter relatifs. Dans la deuxième partie, nous introduisons la notion d'opérateur de Rota-Baxter relatif twisté sur les algèbres 3-Lie et construisons une L∞-algèbre dont les éléments de Maurer-Cartan sont des opérateurs de Rota-Baxter relatifs twistés. Cela nous permet de définir la cohomologie de Chevalley-Eilenberg d'un opérateur de Rota-Baxter relatif twisté. Dans la dernière partie, nous étudions la représentation des algèbres ternaires de Jordan, ce qui nous permet d'introduire la notion d'algèbres ternaires de Jordan cohérentes. Ensuite, les opérateurs de Rota-Baxter relatifs des algèbres ternaires de Jordan sont introduits et les solutions de l'équation de Yang-Baxter de Jordan ternaire sont discutées en impliquant des opérateurs de Rota-Baxter relatifsThe goal of this thesis is to explore relative Rota-Baxter operators in the context of ternary algebras of both Lie and Jordan types. We mainly consider Lie triple systems, 3-Lie algebras and ternary Jordan algebras. The study covers their structure, cohomology, deformations, and their connection with the Yang-Baxter equations. The work is divided into three main parts. The first part aims first to introduce and study a graded Lie algebra whose Maurer-Cartan elements are Lie triple systems. It turns out to be the controlling algebra of Lie triple systems deformations and fits with the adjoint cohomology theory of Lie triple systems introduced by Yamaguti. In addition, we introduce the notion of relative Rota-Baxter operators on Lie triple systems and construct a Lie 3-algebra as a special case of L∞-algebras, where the Maurer-Cartan elements correspond to relative Rota-Baxter operators. In the second part, we introduce the concept of twisted relative Rota-Baxter operators on 3-Lie algebras and construct an L∞-algebra, where the Maurer-Cartan elements are twisted relative Rota-Baxter operators. This allows us to define the Chevalley-Eilenberg cohomology of a twisted relative Rota-Baxter operator. In the last part, we deal with a representation theory of ternary Jordan algebras. In particular, we introduce and discuss the concept of coherent ternary Jordan algebras. We then define relative Rota-Baxter operators for ternary Jordan algebras and discuss solutions ofthe ternary Jordan Yang-Baxter equation involving relative Rota-Baxter operators. Moreover, we investigate ternary pre-Jordan algebras as the underlying algebraic structure of relative Rota-Baxter operators
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Hidri, Samiha. "Formes bilinéaires invariantes sur les algèbres de Leibniz et les systèmes triples de Lie (resp. Jordan)". Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0237/document.
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Dans cette thèse, on étudie la structure de quelques types d'algèbres (binaires et ternaires) munies d'une forme bilinéaire symétrique, non dégénérée et associative (ou invariante). La première partie de cette thèse est consacrée à l'étude des algèbres de Leibniz quadratiques. On montre que ces algèbres sont symétriques. De plus, on utilise la T*-extension et la double extension pour montrer plusieurs résultats sur ce type d'algèbres. Ensuite, on a remarqué que l'anti-commutativité du crochet de Lie donne naissance à de nouveaux types d'invariance pour les algèbres de Leibniz : L'invariance à gauche et l'invariance à droite. Alors, on s'est intéresse à l'étude des algèbres de Leibniz (gauche et droite) munies d'une forme bilinéaire symétrique, non dégénérée et invariante à gauche (et invariante à droite). On prouve que ces algèbres sont Lie admissibles. En second lieu, on s'intéresse aux systèmes triples de Lie et de Jordan. On débute la deuxième partie de cette thèse par la description inductive des systèmes triples de Lie quadratiques au moyen de la double extension. En plus, on introduit la T*extension des systèmes triples de Jordan pseudo-Euclidien. Finalement, on donne deux nouvelles caractérisations des systèmes triples de Jordan semi-simples parmi les systèmes triples de Jordan pseudo-EuclidiensIn this thesis, we study the stucture of several types of algebras endowed with Symmetric, non degenerate and invariant bilinear forms. In the first part, we study quadratic Leibniz algebras. First, we prove that these algebras are symmetric. Then, we use the T*-extension and the double extension to prove some properties of this type of Leibniz algebras. Besides, since we observe that the skew-symmetry of the Leibniz bracket gives rise to other types of invariance for a bilinear form on a Leibniz algebra: The left invariance and the right invariance. We focus on the study of left (resp. right) Leibniz algebras with symmetric, non degenerate and left (resp. right) invariant bilinear form. In particular, we prove that these algebras are Lie admissibles. The second part of this work is dedicated to the study of quadratic Lie triple systems and pseudo-euclidien Jordan triple systems. We start by giving an inductive description of quadratic Lie triple systems using double extension. Next, we introduce the T*-extension of Jordan triple systems. Finally, we give new caracterizations of semi-simple Jordan triple systems among pseudo-euclidian Jordan triple systems
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Hidri, Samiha. "Formes bilinéaires invariantes sur les algèbres de Leibniz et les systèmes triples de Lie (resp. Jordan)". Electronic Thesis or Diss., Université de Lorraine, 2016. http://www.theses.fr/2016LORR0237.
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Dans cette thèse, on étudie la structure de quelques types d'algèbres (binaires et ternaires) munies d'une forme bilinéaire symétrique, non dégénérée et associative (ou invariante). La première partie de cette thèse est consacrée à l'étude des algèbres de Leibniz quadratiques. On montre que ces algèbres sont symétriques. De plus, on utilise la T*-extension et la double extension pour montrer plusieurs résultats sur ce type d'algèbres. Ensuite, on a remarqué que l'anti-commutativité du crochet de Lie donne naissance à de nouveaux types d'invariance pour les algèbres de Leibniz : L'invariance à gauche et l'invariance à droite. Alors, on s'est intéresse à l'étude des algèbres de Leibniz (gauche et droite) munies d'une forme bilinéaire symétrique, non dégénérée et invariante à gauche (et invariante à droite). On prouve que ces algèbres sont Lie admissibles. En second lieu, on s'intéresse aux systèmes triples de Lie et de Jordan. On débute la deuxième partie de cette thèse par la description inductive des systèmes triples de Lie quadratiques au moyen de la double extension. En plus, on introduit la T*extension des systèmes triples de Jordan pseudo-Euclidien. Finalement, on donne deux nouvelles caractérisations des systèmes triples de Jordan semi-simples parmi les systèmes triples de Jordan pseudo-EuclidiensIn this thesis, we study the stucture of several types of algebras endowed with Symmetric, non degenerate and invariant bilinear forms. In the first part, we study quadratic Leibniz algebras. First, we prove that these algebras are symmetric. Then, we use the T*-extension and the double extension to prove some properties of this type of Leibniz algebras. Besides, since we observe that the skew-symmetry of the Leibniz bracket gives rise to other types of invariance for a bilinear form on a Leibniz algebra: The left invariance and the right invariance. We focus on the study of left (resp. right) Leibniz algebras with symmetric, non degenerate and left (resp. right) invariant bilinear form. In particular, we prove that these algebras are Lie admissibles. The second part of this work is dedicated to the study of quadratic Lie triple systems and pseudo-euclidien Jordan triple systems. We start by giving an inductive description of quadratic Lie triple systems using double extension. Next, we introduce the T*-extension of Jordan triple systems. Finally, we give new caracterizations of semi-simple Jordan triple systems among pseudo-euclidian Jordan triple systems
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Ercan, Tolga. "Sustainability Analysis of Intelligent Transportation Systems". Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5934.
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Commuters in urban areas suffer from traffic congestion on a daily basis. The increasing number of vehicles and vehicle miles traveled (VMT) are exacerbating this congested roadway problem for society. Although literature contains numerous studies that strive to propose solutions to this congestion problem, the problem is still prevalent today. Traffic congestion problem affects society's quality of life socially, economically, and environmentally. In order to alleviate the unsustainable impacts of the congested roadway problem, Intelligent Transportation Systems (ITS) has been utilized to improve sustainable transportation systems in the world. The purpose of this thesis is to analyze the sustainable impacts and performance of the utilization of ITS in the United States.
This thesis advances the body of knowledge of sustainability impacts of ITS related congestion relief through a triple bottom line (TBL) evaluation in the United States. TBL impacts analyze from a holistic perspective, rather than considering only the direct economic benefits. A critical approach to this research was to include both the direct and the indirect environmental and socio-economic impacts associated with the chain of supply paths of traffic congestion relief. To accomplish this aim, net benefits of ITS implementations are analyzed in 101 cities in the United States. In addition to the state level results, seven metropolitan cities in Florida are investigated in detail among these 101 cities. For instance, the results of this study indicated that Florida saved 1.38 E+05 tons of greenhouse gas emissions (tons of carbon dioxide equivalent), $420 million of annual delay reduction costs, and $17.2 million of net fuel-based costs. Furthermore, to quantify the relative impact and sustainability performance of different ITS technologies, several ITS solutions are analyzed in terms of total costs (initial and operation & maintenance costs) and benefits (value of time, emissions, and safety). To account for the uncertainty in benefit and cost analyses, a fuzzy-data envelopment analysis (DEA) methodology is utilized instead of the traditional DEA approach for sustainability performance analysis. The results using the fuzzy-DEA approach indicate that some of the ITS investments are not efficient compared to other investments where as all of them are highly effective investments in terms of the cost/benefit ratios approach. The TBL results of this study provide more comprehensive picture of socio-economic benefits which include the negative and indirect indicators and environmental benefits for ITS related congestion relief. In addition, sustainability performance comparisons and TBL analysis of ITS investments contained encouraging results to support decision makers to pursue ITS projects in the future.M.S.C.E.
Masters
Civil, Environmental, and Construction Engineering
Engineering and Computer Science
Civil Engineering
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Gilliam, Patricia. "Transitional Care for Adolescents with HIV: Characteristics and Current Practices of the Adolescent Trials Network Systems of Care". [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002840.
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Lusito, E. "A Network-based Approach to Breast Cancer Systems Medicine". Doctoral thesis, Università degli Studi di Milano, 2015. http://hdl.handle.net/2434/265572.
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Breast cancer is the most commonly diagnosed cancer and the second leading cause of cancer death in women. Although recent improvements in the prevention, early detection, and treatment of breast cancer have led to a significant decrease in the mortality rate, the identification of an optimal therapeutic strategy for each patient remains a difficult task because of the heterogeneous nature of the disease. Clinical heterogeneity of breast cancer is in part explained by the vast genetic and molecular heterogeneity of this disease, which is now emerging from large-scale screening studies using “-omics” technologies (e.g. microarray gene expression profiling, next-generation sequencing). This genetic and molecular heterogeneity likely contributes significantly to therapy response and clinical outcome. The recent advances in our understanding of the molecular nature of breast cancer due, in particular, to the explosion of high-throughput technologies, is driving a shift away from the “one-dose-fits-all” paradigm in healthcare, to the new “Personalized Cancer Care” paradigm. The aim of “Personalized Cancer Care” is to select the optimal course of clinical intervention for individual patients, maximizing the likelihood of effective treatment and reducing the probability of adverse drug reactions, according to the molecular features of the patient. In light to this medical scenario, the aim of this project is to identify novel molecular mechanisms that are altered in breast cancer through the development of a computational pipeline, in order to propose putative biomarkers and druggable target genes for the personalized management of patients. Through the application of a Systems Biology approach to reverse engineer Gene Regulatory Networks (GRNs) from gene expression data, we built GRNs around “hub” genes transcriptionally correlating with clinical-pathological features associated with breast tumor expression profiles. The relevance of the GRNs as putative cancer-related mechanisms was reinforced by the occurrence of mutational events related to breast cancer in the “hub” genes, as well as in the neighbor genes. Moreover, for some networks, we observed mutually exclusive mutational patterns in the neighbors genes, thus supporting their predicted role as oncogenic mechanisms. Strikingly, a substantial fraction of GRNs were overexpressed in Triple Negative Breast Cancer patients who acquired resistance to therapy, suggesting the involvement of these networks in mechanisms of chemoresistance. In conclusion, our approach allowed us to identify cancer molecular mechanisms frequently altered in breast cancer and in chemorefractory tumors, which may suggest novel cancer biomarkers and potential drug targets for the development of more effective therapeutic strategies in metastatic breast cancer patients.
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Van, der Westhuizen Maria Jacoba. "The engineering and optimization of expression of rotavirus-like particles in insect cells using a South African G9P[6] rotavirus strain / by Maria J. van der Westhuizen". Thesis, North-West University, 2012. http://hdl.handle.net/10394/9852.
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Rotavirus infection causes gastroenteritis, specifically severe gastroenteritis, affecting children younger than five globally, regardless of hygiene and water quality. Current licensed, live, attenuated vaccines do not contain the G9 genotype, which is a prevalent rotavirus strain circulating in sub-Saharan Africa, a region that carries a high rotavirus disease burden. Rotavirus-like particles (RV-VLPs) is an attractive non-live vaccine candidate, which has shown promising results in animal studies. Previously, dsRNA was extracted from a stool sample containing a South African human G9P[6] neonatal strain, and amplified cDNA using a sequence-independent procedure. The consensus sequence was obtained for the genome segments using 454® pyrosequencing. The insect-cell-codon-optimized genome segments 2 (VP2), 4 (VP4), 6 (VP6) and 9 (VP7) were cloned into a modified pFASTBACquad vector (pFBq). Several combinations of the genome segments were cloned to produce double-layered particles (DLP; pFBqVP2VP6) or triple-layered particles (TLP; pFBqVP2VP6VP7). In the current study, a ΔTLP (pFBqdVP2-VP8*VP6VP7) construct was generated. The first 92 amino acids of VP2 are not necessary for the conformation of recombinant RV-VLPs. The ORF of VP8*, which contains immune important epitopes, was fused to the 5’ end of the dVP2 coding region resulting in a dVP2-VP8* fused protein which was expressed in the presence of VP6 and VP7 to produce ΔTLPs. The Bac-to-Bac® Baculovirus Expression System and Spodoptera frugiperda (Sf) 9 insect cells were used for expression. All the proteins were successfully expressed. VP2, VP6, VP4 and the dVP2-VP8* fused protein were visible on Coomassie stained SDS-PAGE. Expression of VP7 could only be confirmed with western blot analysis. Particle formation, as assessed by transmission electron microscopy (TEM), was observed for DLPs. No TLPs of dVP2-8*/6/7 or VP2/6/7 were visualized due to the lower expression level of VP7 and the lack of calcium supplements during the assembly process. In conclusion, it was possible to produce RV-DLPs derived from the consensus sequence determined for a G9P[6] rotavirus directly from stool without prior propagation in cell culture or virus isolation. This strain contains both the G9 and P[6] genotypes that are currently prevalent in sub-Saharan Africa.Thesis (MSc (Biochemistry))--North-West University, Potchefstroom Campus, 2013.
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Peng, Xiaomei. "Posttraumatic stress disorder and chronic musculoskeletal pain : how are they related?" Thesis, 2014. http://hdl.handle.net/1805/4659.
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Indiana University-Purdue University Indianapolis (IUPUI)Symptoms of post-traumatic stress disorder (PTSD) are a common comorbidity in veterans seeking treatment of chronic musculoskeletal pain (CMP). However, little is known regarding the mutual influence of PTSD and CMP in this population. Using cross-sectional and longitudinal data from a randomized clinical trial evaluating a stepped care intervention for CMP in Iraq/Afghanistan veterans (ESCAPE), this dissertation examined the relationships between PTSD and CMP along with other factors including depression, anxiety, catastrophizing and health-related quality of life. The Classification and Regression Tree (CART) analysis was conducted to identify key factors associated with baseline PTSD besides CMP severity. A series of statistical analyses including logistical regression analysis, mixed model repeated measure analysis, confirmatory factor analysis and cross-lagged panel analysis via structural equation modeling were conducted to test five competing models of PTSD symptom clusters, and to examine the mutual influences of PTSD symptom clusters and CMP outcomes. Results showed baseline pain intensity and pain disability predicted PTSD at 9 months. And baseline PTSD predicted improvement of pain disability at 9 months. Moreover, direct relationships were found between PTSD and the disability component of CMP, and indirect relationships were found between PTSD, CMP and CMP components (intensity and disability) mediated by depression, anxiety and pain catastrophizing. Finally, the coexistence of PTSD and more severe pain was associated with worse SF-36 Physical Component Summary (PCS) and Mental Component Summary (MCS) scores. Together these findings provided empirical support for the mutual maintenance theory.
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Tyler, John. "A Pragmatic Standard of Legal Validity". Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10885.
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American jurisprudence currently applies two incompatible validity standards to determine which laws are enforceable. The natural law tradition evaluates validity by an uncertain standard of divine law, and its methodology relies on contradictory views of human reason. Legal positivism, on the other hand, relies on a methodology that commits the analytic fallacy, separates law from its application, and produces an incomplete model of law.
These incompatible standards have created a schism in American jurisprudence that impairs the delivery of justice. This dissertation therefore formulates a new standard for legal validity. This new standard rejects the uncertainties and inconsistencies inherent in natural law theory. It also rejects the narrow linguistic methodology of legal positivism.
In their stead, this dissertation adopts a pragmatic methodology that develops a standard for legal validity based on actual legal experience. This approach focuses on the operations of law and its effects upon ongoing human activities, and it evaluates legal principles by applying the experimental method to the social consequences they produce. Because legal history provides a long record of past experimentation with legal principles, legal history is an essential feature of this method.
This new validity standard contains three principles. The principle of reason requires legal systems to respect every subject as a rational creature with a free will. The principle of reason also requires procedural due process to protect against the punishment of the innocent and the tyranny of the majority. Legal systems that respect their subjects' status as rational creatures with free wills permit their subjects to orient their own behavior. The principle of reason therefore requires substantive due process to ensure that laws provide dependable guideposts to individuals in orienting their behavior.
The principle of consent recognizes that the legitimacy of law derives from the consent of those subject to its power. Common law custom, the doctrine of stare decisis, and legislation sanctioned by the subjects' legitimate representatives all evidence consent.
The principle of autonomy establishes the authority of law. Laws must wield supremacy over political rulers, and political rulers must be subject to the same laws as other citizens. Political rulers may not arbitrarily alter the law to accord to their will.
Legal history demonstrates that, in the absence of a validity standard based on these principles, legal systems will not treat their subjects as ends in themselves. They will inevitably treat their subjects as mere means to other ends. Once laws do this, men have no rest from evil.
Livros sobre o assunto "Lie triple system"
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ʻAbd Allāh ibn ʻAbbār ʻAnazī. Aṣdaq al-dalāʾil fī ansāb Banī Wāʾil: Qabāʾil ʻAnazah. 2a ed. [al-Riyaḍ]: ʻA.A.b.ʻA. al-Maʻnī, 1991.
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Wenyu, Wang John, ed. Statistical methods for survival data analysis. 3a ed. New York: J. Wiley, 2003.
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V, Kabanov Alexander, Felgner Philip L. 1950- e Seymour L. W, eds. Self-assembling complexes for gene delivery: From laboratory to clinical trial. Chichester: Wiley, 1998.
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Jordan Triple Systems in Complex and Functional Analysis. American Mathematical Society, 2020.
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Cullen, Christopher. The Triple Concordance system and Liu Xin’s ‘Grand Unified Theory’. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198733119.003.0005.
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In 9 CE, the powerful courtier Wang Mang deposed the infant prince of Han and took power as first emperor of his own dynasty. To help him sustain this claim, Liu Xin created what amounted to a Grand Unified Theory, in which all the important regularities of nature were explained with reference to numbers. We shall look in detail at the Triple Concordance system that resulted from this initiative, and follow through some examples of calculation based on it. Here we shall meet for the first time certain common features of all such systems. Liu Xin also undertook an ambitious project to use his new system to reconstruct the records of astronomical phenomena in a number of historical texts. Liu Xin’s work gives us an in-depth view of how one of the central figures in the early development of Chinese mathematical sciences saw the world.
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Ncube, Caroline B. Three Centuries and Counting. Editado por Rochelle Dreyfuss e Justine Pila. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780198758457.013.21.
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This chapter provides a historical account of the development of intellectual property (IP) law on the African continent, and how IP systems and their transposed legislation displaced existing knowledge governance systems. It discusses how the entrenched primarily extractor-biased IP system in the post-TRIPs era led to a compliance confidence crisis in which ill-equipped African states were overwhelmed by the political dynamics that led to a compliance overdrive manifested in developing countries and least-developed countries (LDCs) enacting provisions they were not required to enact under prevailing transitional periods. In this context, it canvasses the continent’s attempt to leverage fully TRIPS flexibilities, and discusses the current continental IP system. It briefly considers the protection of traditional knowledge and plant varieties as exemplars of aspects of IP that are critical to the continent due to the nature of the primacy of a traditional way of life for a significant portion of its population.
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Hafemeister, Thomas. Criminal Trials and Mental Disorders. NYU Press, 2019. http://dx.doi.org/10.18574/nyu/9781479804856.001.0001.
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The American criminal justice system is based on the bedrock principles of fairness and justice for all. In striving to ensure that all criminal defendants are treated equally under the law, it endeavors to handle like-cases in like-fashion, adhering to the proposition that the same rules and procedures should be employed regardless of a defendant’s wealth or poverty, social status, race, ethnicity, or gender. Yet, exceptions have been recognized when special circumstances are perceived to have driven a defendant’s behavior or are likely to skew the defendant’s trial. Examples include the right to act in self-defense and to be appointed an attorney if you cannot afford one. Another set of exceptions, but ones that are much more controversial, poorly articulated, and inconsistently applied, involves criminal defendants with a mental disorder. Some of these individuals are perceived to be less culpable, as well as less capable of exercising the rights all defendants retain within the justice system, more in need of mental health services than criminal prosecution, and warranting enhanced protections at trial. As a result, special rules and procedures have evolved over the centuries, often without fanfare and even today with little systematic examination, to be applied to cases involving defendants with a mental disorder. This book offers that systematic examination. It identifies the various stages of criminal justice proceedings when the mental status of a criminal defendant may be relevant, associated legal and policy issues, the history and evolution of these issues, how they are currently resolved, and how forensic mental health assessments are conducted and employed during criminal proceedings.
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N. M, Gayathri, e Nidhi R. THE LAW RELATING TO CLINICAL TRIALS IN INDIA: THE PREVAILING DEFICIENCIES AND THE ROAD AHEAD. Jupiter Publications Consortium, 2023. http://dx.doi.org/10.47715/jpc.b.978-93-91303-78-5.
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Clinical trials stand at the crux of medical advancement, serving as the vital link between laboratory research and the availability of new treatments for patients’ ailments. In a world increasingly reliant on evidence-based medicine, the importance of rigorous, ethical, and well-regulated clinical trials cannot be overstated. However, the dynamic and multifaceted nature of clinical trials raises complex legal, ethical, and social issues, particularly in a diverse and populous nation like India. This book, “The Law Relating to Clinical Trials in India: The Prevailing Deficiencies and the Road Ahead,” by Ms. Gayathri N. M. and Ms. Nidhi R, provides a comprehensive analysis of India’s legal framework governing clinical trials. It assesses the current state of the law, identifies the deficiencies therein, and offers a thought-provoking exploration of the path to rectifying these shortcomings. The pages within unfold the historical tapestry of clinical trials, setting the stage with an exploration of their evolution both globally and within the Indian context. The book ventures into the intricate lattice of regulations and guidelines that govern clinical trials in India and juxtaposes them against the global standards set by more developed frameworks in the United States and Canada. Through the chapters, the reader is invited to examine the role of Indian courts in interpreting and applying the laws concerning clinical trials, often acting as bulwarks against unethical practices. The narrative further delves into the comparisons between regulatory systems, thereby drawing lessons from international best practices. Perhaps most critically, this work does not shy away from discussing the challenges and deficiencies that mar the current Indian clinical trial landscape. It ventures into the depths of the 2019 New Drugs and Clinical Trials Rules (NDCTR), unearthing its flaws and potential. The Covid-19 pandemic and the resultant vaccine fast approvals present a case study, highlighting the urgency for reform in the face of unprecedented global health challenges. As we reach the denouement in the concluding chapter, the authors synthesize their findings and articulate a series of well-reasoned suggestions. Their vision for the future of India’s clinical trial legal system is one of pragmatism and hope, guided by the twin stars of participant safety and scientific integrity. The preface serves as an invitation to readers — scholars, practitioners, policymakers, and anyone with an interest in the crossroads of law, medicine, and ethics — to embark on this intellectual journey. The goal is not only to inform but also to inspire action that will shape a more robust, just, and effective framework for clinical trials in India. In closing, this book aims to contribute meaningfully to the discourse on improving the regulatory environment for clinical trials in India, ensuring that the nation’s laws keep pace with scientific progress while safeguarding the rights and welfare of participants.
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Evans, Charlotte, Anne Creaton, Marcus Kennedy e Terry Martin, eds. Retrieval coordination. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780198722168.003.0003.
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Coordination lies at the heart of retrieval systems. A successful retrieval is a well-planned well-coordinated one. Despite this, very little has been written on the subject. Determining a patient’s clinical needs while simultaneously making complex logistical decisions involving multiple cases takes considerable skill and experience. This chapter covers the essentials of retrieval coordination including providing advice to referrers, case triage, and decisions surrounding crew, platform, and destination choice. The retrieval coordinator can feel lonely and overwhelmed at times and requires strategies to combat cognitive overload and manage conflict. Not all patients should be retrieved and a good grasp of end of life care and palliation is required. Retrieval coordination involves making the right decisions for both the individual patient and the system. Who has the most to gain by going first is a complex question requiring careful consideration.
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Groscup, Jennifer L. The Impact of Legally Relevant Media Exposure on Criminal Juror Decision-Making. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190658113.003.0007.
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Exposure to various forms of media can potentially impact decision-making by jurors in criminal trials. Cases like the highly publicized Casey Anthony trial, in which jurors’ media exposure might have affected the verdict, highlight the importance of understanding what messages jurors receive from the media and how those messages might influence their perceptions of trial participants and evidence. This chapter first explores research on the content of legally relevant news media, reality television, and scripted television dramas to better understand the messages the media might be delivering. Next, it reviews research suggesting how various media sources influence the development of legally relevant attitudes and, in turn, juror decision-making. The chapter then investigates the media’s direct influence on juror decision-making, focusing particularly on the CSI Effect. Finally, it discusses recommendations for jury system reform that might decrease media influence as well as future research directions.
Capítulos de livros sobre o assunto "Lie triple system"
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Jacobson, Nathan. "Lie and Jordan Triple Systems". In Nathan Jacobson Collected Mathematical Papers, 17–38. Boston, MA: Birkhäuser Boston, 1989. http://dx.doi.org/10.1007/978-1-4612-3694-8_2.
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Kamiya, Noriaki. "On Radicals of Triple Systems". In Groups, Rings, Lie and Hopf Algebras, 75–83. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4613-0235-3_5.
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Roos, Guy. "Volume of Bounded Symmetric Domains and Compactification of Jordan Triple Systems". In Lie Groups and Lie Algebras, 249–59. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5258-7_16.
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Baklouti, Amir, e Samiha Hidri. "Inductive Description of Quadratic Lie and Pseudo-Euclidean Jordan Triple Systems". In Forum for Interdisciplinary Mathematics, 65–93. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8498-5_4.
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Caro-González, A., A. Serra, X. Albala, C. E. Borges, D. Casado-Mansilla, J. Colobrans, E. Iñigo, J. Millard, A. Mugarra-Elorriaga e Renata Petrevska Nechkoska. "The Three MuskEUteers". In Contributions to Management Science, 3–28. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-11065-8_1.
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AbstractUnder the inspiring and aspiring title: Paving the way for pushing and pursuing a “one for all, all for one” triple transition: social, green, and digital: The Three MuskEUteers, a group of remarkable co-authors and contributors have developed radically new forward-looking visions, principles, approaches, and action recommendations for an attuned indivisible social, green, and digital transition.The triple transition is aimed at helping humanity gather around a life-sustaining purpose, as opposed to life-destroying one in terms of wars of all kinds (military, economic, political, etc.); nature decay and wreckage (carbon footprint, plastic pollution, soil poisoning, etc.); human alienation (favelas, homeless persons, refugee camps, child malnutrition, poverty, exclusion of any kind); and geographic imbalances with empty rural spaces and overcrowded megacities (creating difficult access of rural and/or remote population to care, health, and other essential services; difficulty of urban population to contact with natural environments).The work highlights the urgent need to speed up a third social transition (Within this social transition dimension we understand the socio-cultural scope as any social shift implies a cultural transition and vice versa, with its very deep implications.), in addition to the green and digital transitions more widely recognised by the international community. Innovation, or a European industry-led twin transition aiming for climate neutrality and digital leadership, cannot be supported without a firm, responsive, responsible social and environmental engagement. Neither is it possible to tackle a JUST triple transition which is not firmly rooted in worthwhile human development, underpinned by the Sustainable Development Goals. And none of these transitions can go separately and/or isolated; they all need to intertwine around the notion of (more, firmer, and determined) just transition.European society is presented as a huge “co-laboratory” for this “all for one, one for all” boundaryless triple transition to respond to the urgent radical changes demanded by humanity and by the planet. The chapter proposes a radically new vision to pursue a non-explored transformative way to ideate, design, develop, and deliver science, innovation, and collaboration through experimentation and learning, and throughout multi-stakeholder engagement from the n-helix spectrum. It proposes systemic innovation tactics for the “how” (green, techno-digital), for the strategic “what” (green, social), for the purposeful “why” (green, social), and for the operational “how best” (green, social, techno-digital) within the governing principles of eco-centric society. This encompasses: Courageous goal-aligned alternatives, as a shift to new (yet ancient) principles of eco-centric rather than ego-centric behaviour. The adoption of a “complex system mind-set” to build up dynamic, context-sensitive, and holistic approaches to co-design mission and purpose-driven actions, outcomes, outputs, and no-harm impacts. The ignition of the transformative capacity of all forms of collaboration (international, interdisciplinary, intersectoral, intergenerational, inter-institutional, inter-genders) vs hierarchy as alternative governance and distribution models to overcome the unjust and unsustainable biased status quo within evolving, adaptable, flexible, and transformational n-helix ecosystems. The Three MuskEUteers, deeply anchored in European values (human dignity, freedom, democracy, equality, rule of law, and human rights), will pave the way and drive humanity towards the achievement of the ambitious, but achievable, targets of the United Nations 2030 Global Agenda, the Sustainable Development Goals.Europe can be the initiator of co-laboratory experiments where social change drives the “all for one, one for all” dream into transforming this three-prong transition into possible real good ecosystems working.
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Karpus, Karolina. "Sustainability, the principle of environmental integration in EU law, and the legal form of planning acts". In The European Green Deal and the Impact of Climate Change on the EU Regulatory Framework, 37–54. Bruxelles: Presses universitaires Saint-Louis Bruxelles, 2024. http://dx.doi.org/10.4000/12keu.
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This chapter argues that the integrated approach, as an inherent aspect of sustainable transformation of socio-economic life, raises vital theoretical challenges for the contemporary legal system. These can be examined with help of the responsive law paradigm. Presently, public planning at EU level, motivated by environmental goals, is an area that may be used for the purpose of illustrating the trials of ‘greening’ the theory of sources of law. The search of cohesion between policy and law is reflected in the planning act, which is a formal result of law-making activities integrating human development and environmental protection. This chapter attempts to identify and comment on the two key models of planning acts functioning in EU law. Simultaneously, it endeavours to critically assess the state of affairs in that regard following the enactment of the European Green Deal in 2019.
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Lutz, Alexander, e Axel Lachmeyer. "SciPPPer: Automatic Lock-Passage for Inland Vessels – Practical Results Focusing on Control Performance". In Lecture Notes in Civil Engineering, 959–68. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6138-0_85.
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AbstractNavigating through locks is one of the most challenging tasks that skippers have to perform in inland navigation. Typical dimensions of a ship (width = 11.45 m) and a lock (width = 12 m) result in an error margin of less than 30 cm to the left and to the right of the ship when navigating within a lock chamber. Typical inland vessels on European waters have a length of 82 to 186 m. The wheel house on cargo vessels is located close to the stern of the vessel. This leads to low visibility of the bow in the lock chamber. In order to cope with this issue, a deck hand monitors the bow and announces distances to the skipper via radio. The quality of this information depends on the deck hand’s ability to judge distances correctly and is prone to error. This highly demanding maneuver needs to be performed up to 15 times per day. Each lock passage can take up to 30 minutes. The research project SciPPPer aims at automating this complex navigational task.The German acronym SciPPPer stands for Schleusenassistenzsystem basierend auf PPP und VDES für die Binnenschifffahrt – lock assistant system based on PPP and VDES for inland navigation. The idea is to fully automate the navigation into and out of a lock using high-precision GNSS (Global Navigation Satellite System) with PPP (precise point positioning) correction data which is transmitted from shore to ship using VDES (VHF Data Exchange System), an extension to AIS (Automatic Identification System). This absolute measurement data is complemented by relative measurement data using LiDAR and automotive RADAR and fused with inertial measurement data delivered by a mechanical gyro system. Apart from the challenge of precisely measuring the position and orientation of the vessel within the lock chamber, the control task poses an interesting problem as well. This contribution introduces both, the measuring and the control problem. However, the focus lies on the results of the control performance that was achieved on a full-bridge simulator as well as during real-world trials. A full-bridge simulator was used in order to test the control strategy and its algorithms safely. A number of different actuator configurations were investigated. Typical inland cargo vessels use one or two propellers with Kort nozzle and a twin rudder behind each propeller and a 360° turnable bow thruster. Typical inland passenger vessels use several (2–4) 360° turnable rudder propellers as main propulsion as well as a 360° turnable bow thruster or a classical tunnel thruster which can only apply forces to starboard or portside. These typical configurations were examined by simulation. The real-world trials were performed on a passenger vessel with three rudder propellers as main propulsion as well as a classical tunnel bow thruster acting left and right.This contribution presents the results of the simulator study as well as the real-world trials in terms of control performance. It explains specific challenges due to the navigation within an extremely confined space. The contribution concludes with lessons learned as well as an outlook focusing on the potential of the introduction of such a system to the inland navigation market.
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Bossi, Paolo, e Erika Stucchi. "Exercise and Nutrition Interventions in Head and Neck Cancer". In Critical Issues in Head and Neck Oncology, 347–54. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-23175-9_21.
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AbstractOverall Survival (OS) and late quality of life of patients with locally advanced, HPV-negative Head and Neck Squamous Cell Cancer (HNSCC) are not satisfactory. Nutritional status at the beginning of both surgical and non-surgical treatment with curative intent has been linked to OS and quality of life. Weight loss, body-mass index, functional parameters, and biochemical examinations have been associated with the risk of treatment-related adverse events, mortality, quality of life and outcome. Moreover, there is a strong need for effective preventive approaches that could be implemented after completion of curative treatment to reduce recurrences, second tumors and improve quality of life. Aerobic exercise training, which is known to stimulate the immune system, and nutritional interventions represent easy, acceptable and reproducible methods to increase immune and nutritional competence, impacting thus on the aforementioned objectives. Participating in exercise training programs has been well accepted by patients with HNSCC, underlining the feasibility of such an intervention. There are also immunological arguments to promote an adequate physical activity in HNSCC patients. Baseline and after treatment immune competence of HNSCC should be weighted, as it may impact on cancer recurrence and OS. Patients with HNSCC have significantly lower absolute numbers of CD3+, CD4+ and CD8 + T cells than normal controls, and lymphocyte counts, neutrophil/lymphocyte ratio and the prognostic nutritional index (PNI) are associated with prognosis. Aerobic exercise training prevents immune senescence, and therefore may prevent cancer development. The immune system activity is accompanied by an increased rate of metabolism, requiring energy sources, substrates for biosynthesis and regulatory molecules, which are ultimately derived from the diet. Hence, an adequate supply of a wide range of nutrients is essential to support the immune system to function optimally. Therefore, a regular nutritional counselling combined with personalized exercise training is a simple and very cheap way that could improve patient’s nutritional condition and immunological function, and ultimately impact on survival and quality of life. There is a strong need for well conducted clinical trials aimed at evaluating, in homogeneous groups of HNSCC patients, the impact of nutritional interventions (also comprising immunonutrition) and physical exercise. The evaluation of surrogate endpoints like circulating immune cells should also be explored to identify feasible and effective interventions. Integrating these interventions within immunotherapy approaches represents another area deserving further studies.
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Cong, Xin, Yanqin Dong, Hanqi Zhou e Bing Liu. "Restricted δ Lie Triple Systems". In Fuzzy Systems and Data Mining IX. IOS Press, 2023. http://dx.doi.org/10.3233/faia231058.
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This article mainly introduces some structural properties of confined δ Lie triple systems are studied by means of the relation among the restricted Lie three systems, modular Lie algebras and δ Lie triple systems. Firstly, we verify by induction that the set of all linear transformations that restricted δ Lie triple systems satisfies the condition of restricted δ Lie triple systems. Next,the first mathematical induction method is used to verify that the generalized derivations and the quasiderivations are p-subsystems of the set of all linear transformations that restricted δ Lie three systems. Finally, it is proved that if the restricted δ Lie system has a trivial center, then the center is the commutator system of the generalized derivations.
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Zhou, Hanqi, Yanqin Dong, Xinyang Li, Xin Cong e Bing Liu. "Derivation Algebras of Restricted Hom-Lie Triple Systems". In Fuzzy Systems and Data Mining IX. IOS Press, 2023. http://dx.doi.org/10.3233/faia231057.
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In this paper, we investigate the properties of derivations of restricted Hom-Lie triple systems. By giving the concepts of derivations, generalized derivations, centroids and Hom-p-subsystems, we obtain some good results on generalized derivation algebras and their subalgebras, which including the subspace ℧ satisfying some conditions in the linear transformation End(L) is a restricted Hom-Lie triple system, the generalized derivation is a Hom-p-subsystem of ℧ and the central derivation is the intersection of the centroid and the derivation. The novelty of this paper is to discuss the derivation properties of Hom-Lie triple systems on the field 𝔽 of characteristic p, which makes the derivation structure of restricted Hom-Lie triple systems more complete.
Trabalhos de conferências sobre o assunto "Lie triple system"
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Bashenini, M. S., B. M. Bhandari e K. G. Davies. "Trials of Corrosion Control Procedures for Underground Reinforced Concrete Power Manholes". In CORROSION 1989, 1–19. NACE International, 1989. https://doi.org/10.5006/c1989-89389.
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Abstract Severe chloride-ion-induced corrosion damage has occurred on some of the 2500 underground reinforced concrete power manholes at Jubail Industrial City. These manholes carry 34.5 - 115kV cables and are part of the electrical power distribution network. They are approximately 6 years old, have an internal dimension of up to 8 m and are as much as 6 m below the groundwater table. A survey has shown that some 150 manholes needed urgent attention to prevent further structural damage that might affect the power distribution system on which the City depends. Numerous options for rehabilitating the manholes were considered and evaluated and finally two methods were chosen. For shallow manholes, not congested with cables, a new manhole would be constructed within the existing one. For deep manholes, or those congested with cables, all unsound concrete would be properly repaired and an impressed current cathodic protection (ICCP) system installed. The latter method - concrete repair and the design and installation of a cathodic protection system - had to consider the existing installations, restricted access, remoteness of some manholes, and the presence of high-voltage cables, which had to stay energized during repair work. Furthermore, the repair and protection had to be dependable and maintainable during the design life. The conventional application of cementitious overlays, such as shotcrete, could not be used, so demonstration trials were carried out to examine the constructibility, performance and suitability of alternative overlays and ICCP systems.
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Jansen, H. J. M., N. I. S. Al-Behlani e H. A. H. Qamshoey. "Application of Non-Metallic Line Pipe Materials to Reduce Life Cycle Cost of Upstream Oil & Gas Gathering Production Facilities". In CORROSION 2005, 1–13. NACE International, 2005. https://doi.org/10.5006/c2005-05527.
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Abstract In 2003, the Company in Oman, produced 700,000 bbl/day net oil and 4,000,000 bbl/day water from a large number of widely geographically spread mature fields. The produced fluids in the gathering system are becoming more aggressive resulting in high corrosion rates of carbon steel flowlines. In order to manage flowline corrosion, the Company has long had the leading edge in the Arabian Gulf Region in the application of a range of non-metallic pipe materials. Glass Reinforced Epoxy (GRE) pipe and polyethylene (PE) liners are widely applied and products such as reelable Reinforced Thermoplastic Pipe (RTP) and spoolable GRE have been developed, qualified, trialed and are now being applied. This paper describes the operating envelopes as applied by the Company of the various materials used and discusses the minimum life-cycle cost based materials selection strategy developed by the Company for the gathering systems.
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Lyublinski, Efim, Kelly Baker, Terry Natale, Monique Posner, Gautam Ramdas, Alexander Roytman, Yefim Vaks e Marcelo Schultz. "Corrosion Protection of Storage Tank Soil Side Bottoms Application Experience". In CORROSION 2015, 1–5. NACE International, 2015. https://doi.org/10.5006/c2015-06016.
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Abstract Corrosion of soil side bottoms is unpredictable and can be up to 5 mm/year. The soil side bottom cannot be protected while the tank is in service. The well-known cathodic protection system is not efficient enough. This paper presents case studies of soil side bottom corrosion protection using new systems with volatile and soluble corrosion inhibitors installed on new and existing soil side and double bottom aboveground storage tanks. This paper describes field trial and application experience of principally new corrosion protection systems for different designs of storage tank foundations. The new system demonstrates corrosion protection efficiencies as high as 70-90% and also decreases the incidence of pitting corrosion in most aggressive environment conditions. Application experience has shown that inhibitor use can increase the tank service life approximately 3-5 times and reduce maintenance and replacement costs.
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Decker, Lance N., Jerry Knoblach e J. Craig Kitchin. "Trials and Experiences in Wireless Automated Pipeline Rectifier Monitoring". In CORROSION 2008, 1–10. NACE International, 2008. https://doi.org/10.5006/c2008-08061.
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Abstract Remote equipment, challenging terrain, long runs of power services, government regulation, and manpower costs create an environment for wireless automated pipeline rectifier monitoring. This paper will discuss the trials, experiences, lessons and real life application of low cost, broad area, wireless cathodic protection (CP) rectifier monitoring for remote areas. The system goals are to monitor the CP equipment status, retrieve and report the rectifier output daily, report anomalies as they occur (power outages, drastic changes in rectifier output, etc.), create DOT reports (or interface with current reporting mechanisms), and give a graphical display of the rectifier behavior over time.
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Martinussen, Hanne, Ingar Stian Nerbø, Harald Sleire, Ole Alexander Eek e Trine Okstad. "Observation of the Flow Dependent Corrosion Rate by Ultrasound Corrosion Monitoring on a Gas Pipeline". In CORROSION 2017, 1–11. NACE International, 2017. https://doi.org/10.5006/c2017-09336.
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Abstract An ultrasonic erosion and corrosion monitoring system which provides real-time, online wall thickness data for onshore and topside piping and pipelines is presented. It is non-invasive and is installed and operated without interfering with production. Pulse-echo ultrasound monitoring provides fast and accurate data concerning erosion and corrosion rates, making it an effective tool for feedback in corrosion inhibitor programs. A 6-month trial of the ultrasonic monitoring system has been performed on an 8 inch OD water pipe in a gas plant. The system recorded measurements 4 times per day. In addition, manual ultrasonic testing (UT) was performed before and after the trial period. Comparison of the results showed that the manual UT measurements overestimated the corrosion rates by more than 100% compared to the ultrasonic monitoring system. During the trial period, a significant increase in the corrosion rate was observed. The increased corrosion was correlated to an increase in the flow rate in the same time period. This trial demonstrated that ultrasonic monitoring can be applied to detect changes in real-life corrosion rates in a short time (3 weeks). This short feedback time can be used to give advanced warnings on corrosion issues on bends, T-pieces or other areas. Using the ultrasonic corrosion monitoring system the operator will obtain a more accurate lifetime estimate of the pipe, and the possibility to plan for an accurate maintenance program.
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Call, Ted. "Thermal Spray Coatings - past, Present & Future". In SSPC 2005, 1–6. SSPC, 2005. https://doi.org/10.5006/s2005-00007.
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Abstract Thermal spray coatings (TSC) have been successfully used in all major sectors of the marine and industrial corrosion control coatings market. Approximately twenty years ago they were introduced to the bridge coatings sector of the market on a trial basis. The overall positive results of these TSC tests in the bridge market have generated a wealth of information and much is known today about their origin and benefits. TSC have proven to be the longest lasting coating systems available. They are the most cost effective from a life cycle cost (LCC) analysis and their initial application cost is continuing to drop (1). This paper will discuss the present status of TSC as an approved alternative coating system and what needs to be done in order to effectively promote their use as a viable mainstream coating system to benefit the future bridge coatings market.
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McGough, C. M., P. H. Gill e R. A. Muia. "Lessons Learned in over 100 Zebra Mussel Control Applications at Industrial Facilities". In CORROSION 1998, 1–11. NACE International, 1998. https://doi.org/10.5006/c1998-98524.
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Abstract Since their introduction into US waterways, Zebra Mussels (Dreissena polymorphae) have spread rapidly throughout the Great Lakes and Mississippi regions. These mussels have continued to colonize the intake pipes of industrial water supplies and water distribution systems throughout the affected areas. Their colonization has compromised plant safety and production efficiency, and steadily increased costs to water users. The design of each industrial plant water distribution system is unique. A comprehensive zebra mussel control strategy using the best available options must be considered in each specific situation. This paper discusses the successful use of one strategy (a quaternary ammonia-based molluscicide) in the battle against zebra mussels. The commercial life cycle of an industrial molluscicide began with initial toxicity screening in the laboratory. The evaluation continued at plant sites through field trials and applications. Lessons learned from these experiences helped direct our efforts toward the development of a second generation program.
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Baynham, John MW, Tim Froome e Robert A. Adey. "Jacket SACP System Design and Optimization Using Simulation". In CORROSION 2012, 1–19. NACE International, 2012. https://doi.org/10.5006/c2012-01281.
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Abstract Design of sacrificial anode cathodic protection (SACP) systems to achieve uniform anode mass loss rates is desirable, since it helps avoid early installation of costly retrofit systems which may be needed if some anodes are consumed more quickly than others. Such optimized design is only practically possible through the use of mathematical modeling performed using numerical techniques. A range of numerical methodologies can be applied to simulation of galvanic effects and cathodic protection, and of these it is the boundary element method that is applied in this work. The simulation requires an accurate model of the structure which is to be protected, as well as the anodes, and any other metallic structures which may act as current drains even though they may not need to be cathodically protected). The optimization process first involves design and simulation of an initial SACP system design. Performance of the design is assessed against criteria which may include anode mass loss rate, most positive allowed potential and remaining anode mass, not only at start of life, but also throughout the design life of the structure. The results of previous assessments are used to guide the selection of the next trial SACP system design, which usually involves changing the number, position or size of anodes, while adhering to user-defined rules (e. g. “keep-out areas”). The process is repeated until satisfactory results are obtained. The objective of this paper is to explore such simulation techniques, and show how they can be combined to provide a practical toolset for SACP system design optimization. This provides the user with new and significantly more powerful design capabilities which are based on real physics rather than standardized design rules. The use of these tools both reduces the risk of the CP design not meeting its required life and ensures an economical design The paper illustrates performance of the design and optimization processes using a jacket structure for which long-term “sigmoidal” polarization curves provide an appropriate representation of calcareous deposits.
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Bazzoni, Bruno, Simone Pietro Dubini, Filippo Belloni, Ahmed Msallem, Paolo Cavassi e Isabella Romeo. "Bouri Field Platforms, Libya. Review and Statistical Analysis of Cathodic Protection Inspection Data". In CORROSION 2011, 1–18. NACE International, 2011. https://doi.org/10.5006/c2011-11051.
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Abstract Bouri Field is located in the Mediterranean Sea, about 120 km North West of Tripoli – in waters 160-170 m deep. The field includes the following main assets: drilling-production platforms (two); inter-field pipeline; sub-sea wells; FSO. The two platforms are the biggest ones in the Mediterranean Sea. Submerged structures are protected against seawater corrosion by means of aluminum alloy galvanic anodes. The original design life of the cathodic protection system was 35 years; however the Bouri CP System Performance Study has indicated that the expected life span of the CP system can be extended by 15 years. During the past operating life, a number of Underwater Inspection Campaigns have been carried out and a significant amount of data has been collected over a period of more than 20 years. These data, in particular structure potentials and anode consumptions, have been gathered and reviewed. The analysis included: follow up of the structure polarization; assessment of the actual protection current density demand; comparisons with the requirements of the international normative. Furthermore, a statistical analysis has been applied to the whole set of data. The paper illustrates the main evidences from data review, the adopted statistical approach and results of the statistical analysis.
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Binder, G. J. "Determine Usable Coating Systems - Results of Laboratory Tests versus Long Term Trials in Nature". In CORROSION 2008, 1–14. NACE International, 2008. https://doi.org/10.5006/c2008-08001.
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Abstract Accelerated laboratory tests are commonly used for judging the performance of coatings for corrosion protection. Assessment could be done by comparison of systems or measuring the damages after the test, mainly the rusting on the scratch, and checked against fixed boundary values. In this study common test methods like salt spray (ISO 7253), as well as cyclic test (NORSOK M-501, ISO 20340) were checked and compared to each other by statistical calculations. By that any relationship between the different tests were figured out. The cycle test according ISO 20340 for offshore structures is relatively new and experiences in practice are limited. Immediately the test procedure indicates that results using this method that only systems with zinc-dust primers passed the test and many well established coating systems failed. The statistical calculations in this work showed, that the test procedure can be shortened by nearly a factor of two to reach comparable results to other accelerated tests and by that time and money will be saved. Results of cycle tests also were compared with test results of long term trials in nature (e.g. immersion and water changing in northern sea). By that procedure acceleration factors of laboratory test were considered. Beneath these tests of rusting of surface further important test parameters for improving the protection behaviour of coating systems under offshore conditions are described in this work.
Relatórios de organizações sobre o assunto "Lie triple system"
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Tiku, Sanjay, Arnav Rana, Binoy John e Aaron Dinovitzer. PR-214-203805-R01 Performance Evaluation of ILI Systems for Dents and Coincident Features. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), março de 2024. http://dx.doi.org/10.55274/r0000056.
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Pipeline integrity management involves the analysis of pipeline condition information (e.g., pipe size, presence and size of features), operational/environmental conditions and line pipe material properties in engineering assessment (fitness-for-purpose) tools to evaluate operational risk. While nominal or minimum specified material properties and SCADA reported, design or estimated operational loading conditions can be considered, pipeline operators depend heavily on pipeline condition data from in-line inspection (ILI) systems. The current project presents the details of performance trials evaluating the ability of ILI systems to provide pipeline condition information for dents with coincident or closely aligned features. A set of sample dent features were prepared along with a trial protocol and performance metrics beyond those presented in API 1163 that were used to characterize performance. ILI system pull and pump through trials of magnetic, ultrasonic and caliper-based ILI technologies from four ILI Service Providers were performed. Data from these trials were used to quantify detection, identification, and sizing performance of the ILI systems for isolated corrosion features, dents with variety of shapes including those without coincident features and those with corrosion, gouges and/or cracks. The effect of dents on the ILI system detection, identification and sizing of the coincident features was evaluated.
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Tiku, Sanjay. PR-214-203820-R01 Performance Evaluation of ILI for Dents with Cracks and Gouges. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), julho de 2023. http://dx.doi.org/10.55274/r0000031.
Texto completo da fonteResumo:
Pipeline integrity management involves the analysis of pipeline condition information (e.g., pipe size, presence and size of features), operational/environmental conditions and line pipe material properties in engineering assessment (fitness-for-purpose) tools to evaluate operational risk. While nominal or minimum specified material properties and SCADA reported, design or estimated operational loading conditions can be considered, pipeline operators depend heavily on pipeline condition data from in-line inspection (ILI) systems. The current project presents the details of performance trials evaluating the ability of ILI systems to provide pipeline condition information for dents with coincident or closely aligned features. A set of sample dent features were prepared along with a trial protocol and performance metrics beyond those presented in API 1163 that were used to characterize performance. ILI system pull and pump through trials of magnetic, ultrasonic and caliper-based ILI technologies from seven ILI Service Providers were performed. Data from these trials were used to quantify detection, identification, and sizing performance of the ILI systems for isolated corrosion features, dents with variety of shapes including those without coincident features and those with corrosion, gouges and/or cracks. The effect of dents on the ILI system detection, identification and sizing of the coincident features was evaluated.
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Garceau, Sean. PR-283-20207-R01 Field Trial of Solar Turbines Methane Emissions Reduction Solution for Gas Compressors. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), julho de 2022. http://dx.doi.org/10.55274/r0012230.
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The Methane Emissions Reduction solution designed by Solar Turbines was installed and evaluated at the Berkshire Hathaway Energy (Dominion) Chambersburg station in Pennsylvania, USA. Solar Turbines supplied a dry seal recompression (DSR) system and a process vent recompression (PVR) system at the station. The objective of the field trial was to evaluate the durability of this new system, compare the performance in the field to simulation models and as needed make improvements to the mechanical design and/or software control. The dry gas seal recompression system was installed and connected to a Solar Turbines C402 process compressor dry seal primary vent to capture, hold, and reuse dry seal gas leakage. The process vent recompression system was connected to the C402 compressor discharge piping to capture the process gas during pressurized hold and inject it back into the suction line in lieu of venting the gas to atmosphere. Operational data for the two systems was collected for 22-months starting in January 2020 and ending in October 2021. Data was collected at different sample rates; high speed (10ms, 100ms), 1 second, 10 seconds, and 1 hour through historical logs and analyzed for this period of time to evaluate the durability of the systems. Several enhancements were implemented and validated. Data collected during a 12-month period showed that a recycle line and volume bottles on the suction of the compressor helped optimize the performance of the compressor and increased durability. In addition, the use of the auxiliary drain recapture tank on the DSR system allowed for the achievement of a capture rate greater than 99% and resolved issues associated with leakage back into the compressor's first stage inlet during the charge period of the cycle.
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You, Siming, Ondřej Mašek, Bauyrzhan Biakhmetov, Simon Ascher, Sudeshna Lahiri, PreetiChaturvedi Bhargava, Thallada Bhaskar, Supravat Sarangi e Sunita Varjani. Feasibility and impacts of Bioenergy Trigeneration systems (BioTrig) in disadvantaged rural areas in India. University of Glasgow, agosto de 2023. http://dx.doi.org/10.36399/gla.pubs.305660.
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This project aims to evaluate the techno-economic and social feasibility, and socio-environmental impacts of bioenergy trigeneration (electricity, clean cooking fuel, and green soil conditioner) systems that tackle the triple crisis of poor electrification, household air pollution, and farmland contamination in rural India. This system is called BioTrig. A project workshop has been held in November in India to discuss and finalise action plans. A questionnaire has been developed to understand the energy, resource, and new technology acceptance of rural households in India. Chemical process modelling, life cycle assessment and cost-benefit analysis has been conducted to evaluate the environmental impact and economic feasibility of BioTrig.
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Einarsson, Rasmus. Nitrogen in the food system. TABLE, fevereiro de 2024. http://dx.doi.org/10.56661/2fa45626.
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Nitrogen (N) plays a dual role in the agri-food system: it is an essential nutrient for all life forms, yet also an environmental pollutant causing a range of environmental and human health impacts. As the plant nutrient needed in greatest quantities, and as a building block of proteins and other biomolecules, N is a necessary part of all life. In the last century, an enormous increase of N turnover in the agri-food system has enabled increasing per-capita food supply for a growing world population, but as an unintended side effect, N pollution has increased to levels widely agreed in science and policy to be far beyond sustainable limits. There is no such thing as perfectly circular N supply. Losses of N to the environment inevitably arise as N is transformed and used in the food system, for example in soil processes, in manure storage, and in fertilizer application. This lost N must be replaced by ‘new’ N, which is N converted to bioavailable forms from the vast atmospheric pool of unreactive dinitrogen (N2). New N comes mainly as synthetic N fertilizer and through a process known as biological N fixation (BNF). In addition, there is a large internal flow of recycled N in the food system, mainly in the form of livestock excreta. This recirculated N, however, is internal to the food system and cannot make up for the inevitable losses of N. The introduction of synthetic N fertilizer during the 20th century revolutionized the entire food system. The industrial production of synthetic N fertilizer was a revolution for agricultural systems because it removed the natural constraint of N scarcity. Given sufficient energy, synthetic N fertilizer can be produced in limitless quantities from atmospheric dinitrogen (N2). This has far-reaching consequences for the whole agri-food system. The annual input of synthetic N fertilizer today is more than twice the annual input of new N in pre-industrial agriculture. Since 1961, increased N input has enabled global output of both crop and livestock products to roughly triple. During the same time period, total food-system N emissions to the environment have also more than tripled. Livestock production is responsible for a large majority of agricultural N emissions. Livestock consume about three-quarters of global cropland N output and are thereby responsible for a similar share of cropland N emissions to air and water. In addition, N emissions from livestock housing and manure management systems contribute a substantial share of global N emissions to air. There is broad political agreement that global N emissions from agriculture should be reduced by about 50%. High-level policy targets of the EU and of the UN Convention on Biological Diversity are for a 50% reduction in N emissions. These targets are in line with a large body of research assessing what would be needed to stay within acceptable limits as regards ecosystem change and human health impacts. In the absence of dietary change towards less N-intensive diets, N emissions from food systems could be reduced by about 30%, compared to business-as-usual scenarios. This could be achieved by implementing a combination of technical measures, improved management practices, improved recycling of wasted N (including N from human excreta), and spatial optimization of agriculture. Human dietary change, especially in the most affluent countries, offers a huge potential for reducing N emissions from food systems. While many of the world’s poor would benefit nutritionally from increasing their consumption of nutrient-rich animal-source foods, many other people consume far more nutrients than is necessary and could reduce consumption of animal-source food by half without any nutritional issues. Research shows that global adoption of healthy but less N-polluting diets might plausibly cut future food-system N losses by 10–40% compared to business-as-usual scenarios. There is no single solution for solving the N challenge. Research shows that efficiency improvements and food waste reductions will almost certainly be insufficient to reach agreed environmental targets. To reach agreed targets, it seems necessary to also shift global average food consumption onto a trajectory with less animal-source food.
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Keating, Louise, Ailish Malone Name, Maire-Brid Casey, Ciaran Bolger, Dara Meldrum e Catherine Doody. Conservative Primary Care Management for Recent Onset Cervical Radiculopathy – a Systematic Review & Meta-analysis Protocol. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, fevereiro de 2022. http://dx.doi.org/10.37766/inplasy2022.2.0047.
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Review question / Objective: To investigate the effectiveness of conservative management available in primary care for adults with recent onset (less than 12 weeks) cervical radiculopathy. Conservative management will be compared to any available comparator i.e. no treatment, placebo or any treatment. Eligibility criteria: Inclusion criteria – trials (as defined in item 15) investigating any conservative management (e.g. exercise, advice, manual therapy, traction, acupuncture, pharmacology etc), involving adults with single level CR (as defined in item 10) of any aetiology, with symptom duration of 12 weeks or less, and including 1 or more of the following outcomes i.e. pain, disability, overall improvement or satisfaction with intervention, quality of life or participation restriction. Exclusion criteria – full text not available, not a randomised controlled trial, trials not involving CR (e.g. cervicobrachial pain, neck pain only), trials involving chronic CR, multilevel or bilateral CR (polyradiculopathy) or radiculomyelopathy, major or systemic pathology, post-surgery interventions, trials of surgery or spinal injection only, or involving a paediatric population or not in English language.
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Lewis, Sherman, Emilio Grande e Ralph Robinson. The Mismeasurement of Mobility for Walkable Neighborhoods. Mineta Transportation Institute, novembro de 2020. http://dx.doi.org/10.31979/mti.2020.2060.
Texto completo da fonteResumo:
The major US household travel surveys do not ask the right questions to understand mobility in Walkable Neighborhoods. Yet few subjects can be more important for sustainability and real economic growth based on all things of value, including sustainability, affordability, and quality of life. Walkable Neighborhoods are a system of land use, transportation, and transportation pricing. They are areas with attractive walking distances of residential and local business land uses of sufficient density to support enough business and transit, with mobility comparable to suburbia and without owning an auto. Mobility is defined as the travel time typically spent to reach destinations outside the home, not trips among other destinations that are not related to the home base. A home round trip returns home the same day, a way of defining routine trips based on the home location. Trip times and purposes, taken together, constitute travel time budgets and add up to total travel time in the course of a day. Furthermore, for Walkable Neighborhoods, the analysis focuses on the trips most important for daily mobility. Mismeasurement consists of including trips that are not real trips to destinations outside the home, totaling 48 percent of trips. It includes purposes that are not short trips functional for walk times and mixing of different trips into single purposes, resulting in even less useful data. The surveys do not separate home round trips from other major trip types such as work round trips and overnight trips. The major household surveys collect vast amounts of information without insight into the data needed for neighborhood sustainability. The methodology of statistics gets in the way of using statistics for the deeper insights we need. Household travel surveys need to be reframed to provide the information needed to understand and improve Walkable Neighborhoods. This research makes progress on the issue, but mismeasurement prevents a better understanding of the issue.
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John A. Sinsel. Plant Line Trial Evaluation of Viable Non-Chromium Passivation Systems for Electrolytin Tinplate, ETP (TRP 9911). Office of Scientific and Technical Information (OSTI), junho de 2003. http://dx.doi.org/10.2172/840952.
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Sartain, Bradley, Kurt Getsinger, Damian Walter, John Madsen e Shayne Levoy. Flowering rush control in hydrodynamic systems : part 1 : water exchange processes. Engineer Research and Development Center (U.S.), setembro de 2022. http://dx.doi.org/10.21079/11681/45425.
Texto completo da fonteResumo:
In 2018, field trials evaluated water-exchange processes using rhodamine WT dye to provide guidance on the effective management of flowering rush (Butomus umbellatus L.) at McNary Dam and Reservoir (Wallula Lake, 15,700 ha). Additional evaluations determined the effectiveness of BubbleTubing (hereafter referred to as bubble curtain) at reducing water exchange within potential flowering rush treatment areas. Dye readings were collected from multiple sampling points at specific time intervals until a dye half-life could be determined. Whole-plot dye half-lives at sites without bubble curtain ranged 0.56–6.7 h. In slower water-exchange sites (≥2.6 h dye half-life), the herbicide diquat should have a sufficient contact time to significantly reduce flowering rush aboveground biomass. Other sites demonstrated very rapid water exchange (<1.5 h dye half-life), likely too rapid to effectively control flowering rush using chemical treatments without the use of a barrier or curtain to slow water exchange. At one site, the use of the bubble curtain increased the dye half-life from 3.8 h with no curtain to 7.6 and 7.1 h with a bubble curtain. The bubble curtain’s ability to slow water exchange will provide improved chemical control and in-crease the potential for other chemical products to be effectively used.
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Virtucio, Michael, Barbaros Cetiner, Bingyu Zhao, Kenichi Soga e Erturgul Taciroglu. A Granular Framework for Modeling the Capacity Loss and Recovery of Regional Transportation Networks under Seismic Hazards: A Case Study on the Port of Los Angeles. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, junho de 2024. http://dx.doi.org/10.55461/hxhg3206.
Texto completo da fonteResumo:
Earthquakes, being both unpredictable and potentially destructive, pose great risks to critical infrastructure systems like transportation. It becomes crucial, therefore, to have both a fine-grained and holistic understanding of how the current state of a transportation system would fare during hypothetical hazard scenarios. This paper introduces a synthesis approach to assessing the impacts of earthquakes by coupling an image-based structure-and-site-specific bridge fragility generation methodology with regional-scale traffic simulations and economic loss prediction models. The proposed approach’s use of context-rich data such as OpenStreetMap and Google Street View enables incorporating information that is abstracted in standard loss analysis tools like HAZUS in order to construct nonlinear bridge models and corresponding fragility functions. The framework uses a semi-dynamic traffic assignment model run on a regional traffic network that includes all freeways and local roads (1,444,790 edges) and outputs traffic volume on roads before and after bridge closures due to an earthquake as well as impacts to individual trips (42,056,426 trips). The combination of these models enables granularity, facilitating a bottom-up approach to estimating costs incurred solely due to physical damage to the transportation network. As a case study, the proposed framework is applied to the road network surrounding the Port of Los Angeles---an infrastructure of crucial importance---for assessing resilience and losses at a high resolution. It is found that the port area is disproportionately impacted in the hypothetical earthquake scenario, and delays in bridge repair can lead to a 50% increase in costs.