Triple Loop Research Articles

Homology of the double and the triple loop spaces¶of E6, E7, and E8

We study the mod p homology of the double and the triple loop spaces of exceptional Lie groups E 6, E 7, and E 8 through the Eilenberg–Moore spectral sequence and the Serre spectral sequence using homology operations. The Bockstein actions on them are also determined. As a result, the Eilenberg–Moore spectral sequences of the path loop fibrations converging to H *(Ω2 G;? p ) and H *(Ω3 G;? p ) collapse at the E 2-term for any compact simple Lie group G.

Circular organizing and triple loop learning

The organizational learning literature distinguishes different levels of learning (zero learning and single, double and triple loop learning) in order to understand the complexity and dynamics of changes in policies, objectives, mental maps, and structures and strategies for learning. This article explores the case of an emerging new organizational design, the circular organization, in order to understand the role of triple loop learning. The circular model was developed on the basis of ideas about the relationship between organizational structure and behavior taken from theories of dynamic systems. Circular design precepts appear to provide a structural facilitation of single and double loop learning. In this respect, the circular design tends to act as a facilitating infrastructure for triple loop learning, that is, exploring the structural opportunities and key competences people need to participate in making well‐informed choices about policies, objectives and other issues.

New dense families of triple loop networks

Abstract Multi-loop digraphs are widely studied mainly because of their symmetric properties and their applications to loop networks. A multi-loop digraph G = G(N; s1, …, sA) has set of vertices V = Z N and adjacencies given by v → v + si mod N, i = 1, …, Δ. For every fixed N, an usual extremal problem is to find the minimum value = min s 1 …s δ ∈ Z N D(N;s 1 …sδ where D(N; s1, …, sA) is the diameter of G. A closely related problem is to find the maximum number of vertices for a fixed value of the diameter. For Δ = 2, all optimal families have been found by using a geometrical approach. For Δ = 3, only some dense (but possibly not optimal) families are known. In this work some new dense families are given for Δ = 3 using a geometrical approach. This technique was already adopted in several papers for Δ = 2 (see for instance [7, 10]). These families improve all previous known results.

New dense families of triple loop networks

Multi-loop digraphs are widely studied mainly because of their symmetric properties and their applications to loop networks. A multi-loop digraph G = G( N; s 1, …, s A ) has set of vertices V = Z N and adjacencies given by v → v + s i mod N, i = 1, …, Δ. For every fixed N, an usual extremal problem is to find the minimum value = min s 1…s δ∈ Z N D(N;s 1…sδ where D( N; s 1, …, s A ) is the diameter of G. A closely related problem is to find the maximum number of vertices for a fixed value of the diameter. For Δ = 2, all optimal families have been found by using a geometrical approach. For Δ = 3, only some dense (but possibly not optimal) families are known. In this work some new dense families are given for Δ = 3 using a geometrical approach. This technique was already adopted in several papers for Δ = 2 (see for instance [7, 10]). These families improve all previous known results.

ICRF Plasma Heating in Axisymmetric Mirrors

The problems of Alfven and ion cyclotron heating in axicymmetrical mirrors are addressed.For the Alfven resonance heating scheme, the properties of continuum waves and kinetic (modified) Alfven waves are considered. The numerical modeling and experimental results for Alfven resonance heating with triple loop antenna are discussed.The specific features of magnetic beach ion cyclotron heating scenario in axisymmetric mirror are considered from the point of view of propagation condition and accessibility of the fast Alfven wave for excitation with external currents. The magnetic beach for continuum Alfven wave is analyzed. Using ray tracing calculations, the significant cyclotron damping of kinetic Alfven wave is predicted for the magnetic beach case.For fast magnetosonic wave cyclotron heating, the mechanisms of wave energy damping are described. The structure of global resonances is discussed. Heating scenarios with single global resonance and resonance overlapping are compared.The applicability of the scenarios mentioned for mirror based neutron source is addressed.

Diversity Management: Triple Loop Learning

Diversity Management: Triple Loop Learning

Diversity Management: Triple Loop Learning.

CONCLUSION. Diversity Management: Triple Loop Learning. DIVERISTY MANAGEMENT. Metatheory, Philosophy, and the History of Knowledge. Metatheory, Theory, and Methodology. Metatheory and Systems Thinking. Contours of Diversity Management. TRIPLE LOOP LEARNING. Typology of Power. Loop 1, Design Management: How? Loop 2, Debate Management: What? Loop 3, Might-Right Management: Why? Loop 3 Continued, Enhancing Emancipatory Practice. Contours of Triple Loop Learning. BEGINNING. Closing Remarks. References. Index.

Triple Loop Networks with Minimal Transmission Delay

A multiloop network is a Cayley digraph of the additive group ℤm of integers modulo m generated by a set A of k ≥ 2 "steps". Because of their application to the computer network design, multiloop networks have been studied extensively. Given an integer d ≥ 2 and a real number r > 1, let m(d,3) be the maximum size of a triple loop network with transmission delay (diameter) less than or equal to d, and let m*(r,3) be the maximum size of a triple loop network with average transmission delay less than or equal to r. In this paper, the following lower bounds are proved: [Formula: see text] which improve earlier lower bounds by Jia and Aguiló, Fiol and Garcia.

ACTION LEARNING, FRAGMENTATION AND INTERACTION: A CASE OF GAY AND LESBIAN WORKPLACE ADVOCACY.

Academy of Management Annual Meeting Proceedings includes abstracts of all papers and symposia presented at the annual conference, plus 6-page abridged versions of the “Best Papers” accepted for inclusion in the program (approximately 10%). Papers published in the Proceedings are abridged because presenting papers at their full length could preclude subsequent journal publication. Please contact the author(s) directly for the full papers. ArticlesACTION LEARNING, FRAGMENTATION AND INTERACTION: A CASE OF GAY AND LESBIAN WORKPLACE ADVOCACY.Erica Foldy and W.E. Douglas CreedErica Foldy and W.E. Douglas CreedPublished Online:13 Dec 2017https://doi.org/10.5465/ambpp.1997.4983793AboutSectionsPDF/EPUB ToolsDownload CitationsAdd to favoritesTrack Citations ShareShare onFacebookTwitterLinkedInRedditEmail AbstractThis paper builds on action learning (AL) theory by decomposing AL method--single, double or triple loop--into three components: argument, action and outcome. This enables AL theory to illuminate the fragmented nature of change. The new framework is applied to a case of gay and lesbian workplace advocacy. The power of the AL framework, we believe, is diminished by this kind of global characterization. Does any substantial change effort happen entirely within a current operating framework, without any challenge to that framework? Can a more radical change effort which takes on the current frame succeed without appealing to some of that Frame's traditional values? Can a change effort bold enough to challenge societal norms happen without transforming individuals? We argue that the interaction of single, double and triple loop methods of change, rather than their independence, should be the focus of analysis. Influenced by postmodern organization approaches (e.g., Boje, 1993, 1995; Cooper and Burrell, 1988; Martin, 1992), we extend the use of AL as an analytic tool by treating change efforts as multi-layered and fragmented. Rather than focusing on single, dominant understandings, we create a framework that listens to local accounts and attends to internal inconsistencies. Instead of using AL to neatly summarize change efforts, we use it to illuminate different and sometimes contradictory facets of a single change effort. To illustrate, we apply our approach to a company's decision to dramatically change its attitude towards its gay and lesbian employees by instituting new policies and institutionalizing an employee network. While a shorthand characterization of this change effort would view it as an unqualified success, our framework will add complexity and nuance to the picture by showing how even such a successful change is rough and unfinished. We start with the story of the change effort, followed by an analysis of the case. As part of the analysis, we su...FiguresReferencesRelatedDetails Vol. 1997, No. 1 Permissions Metrics in the past 12 months History Published online 13 December 2017 Published in print 1 August 1997 InformationCopyright of Academy of Management Journal is the property of Academy of Management and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder’s express written permission. However, users may print, download, or email articles for individual use.KeywordsACTIVE learningORGANIZATIONAL learningKNOWLEDGE managementORGANIZATIONAL change -- ResearchGAY men -- EmploymentLESBIANS -- EmploymentCORPORATE cultureDECISION makingWORK environmentORGANIZATIONAL sociologyDownload PDF

Triple loop networks with small transmission delay

The problem of finding multiloop networks with a fixed number of vertices and small diameter has been widely studied. In this work, we study the triple loop case of the problem by using a geometrical approach which has been already used in the double loop case. Given a fixed number of vertices N, the general problem is to find ‘steps’ s 1, s 2, …, s d ∈ Z N , such that the diagraph G( N; s 1, s 2, …, s d ), with set of vertices V = Z N and adjacencies given by v → v + s i ( mod N), i = 1, 2, …, d, has minimum diameter D( N). A related problem is to maximize the number of vertices N( d, D) when the degree d and the diameter D are given. In the double loop case ( d = 2) it is known that N(2, D) = ⌈ 1 3 (D+2) 2⌉ − 1 . Here, a method based on lattice theory and integral circulant matrices is developed to deal with the triple loop case ( d = 3). This method is then applied for constructing three infinite families of triple loop networks with large order for the values of the diameter D ≡ 2, 4, 5( mod 6), showing that N(3, D) ⩾ 2 27 D 3 + O(D 2) . Similar results are also obtained in the more general framework of (triple) commutative-step digraphs.

Plurality revisited: Diversity management and triple loop learning

This paper suggests one way of managing plurality of theories and methodologies and ways of operationalising them. It suggests that the management of options needs to be linked to a process of reflexive consciousness. Reflexive consciousness operates by recognising that choices of theoretical and methodological commitment have to be made for the purposes of action. Awareness of the provisional and partial nature of choices is key to the management of options. Choice-making is marked by an awareness of the way in which the facility for judgement has been exercised. This includes considering how judgements may be accounted for in the light of alternative choices. Informed awareness means taking into accounttheoretical debates that may be brought to bear in facilitating an appreciation of methodologies and possible operationalisations of them. It also means taking into account matters ofcontemporary concern (specialist or popular) raised in the process of social debate. Our argument is detailed through an explication of what we call diversity management and triple loop learning.

Contours of diversity management and triple loop learning

Introduces diversity management as managing the increased diversity of issues that confront humankind in contemporary organizational and societal affairs. Defines triple loop learning as being about the increase in the fullness and deepness of learning about the diversity of issues and dilemmas faced. Presents the contours of diversity management and triple loop learning. Sees the latter as the dénouement of single loop learning and of double loop learning. Provides a “quickmap” of the contours of diversity management and triple loop learning.

Homology of the double and triple loop space of SO(n)

Homology of the double and triple loop space of SO(n)

Homology of the double and triple loop space of SO(n)

Homology of the double and triple loop space of SO(n)

Regulation of I kappa B alpha and p105 in monocytes and macrophages persistently infected with human immunodeficiency virus.

The mechanisms regulating human immunodeficiency virus (HIV) persistence in human monocytes/macrophages are partially understood. Persistent HIV infection of U937 monocytic cells results in NF-kappa B activation. Whether virus-induced NF-kappa B activation is a mechanism that favors continuous viral replication in macrophages remains unknown. To further delineate the molecular mechanisms involved in the activation of NF-kappa B in HIV-infected monocytes and macrophages, we have focused on the regulation of the I kappa B molecules. First, we show that persistent HIV infection results in the activation of NF-kappa B not only in monocytic cells but also in macrophages. In HIV-infected cells, I kappa B alpha protein levels are decreased secondary to enhanced protein degradation. This parallels the increased I kappa B alpha synthesis secondary to increased I kappa B alpha gene transcription, i.e., increased RNA and transcriptional activity of its promoter-enhancer. Another protein with I kappa B function, p105, is also modified in HIV-infected cells: p105 and p50 steady-state protein levels are increased as a result of increased synthesis and proteolytic processing of p105. Transcriptional activity of p105 is also increased in infected cells and is also mediated by NF-kappa B through a specific kappa B motif. These results demonstrate the existence of a triple autoregulatory loop in monocytes and macrophages involving HIV, p105 and p50, and MAD3, with the end result of persistent NF-kappa B activation and viral persistence. Furthermore, persistent HIV infection of monocytes and macrophages provides a useful model with which to study concomitant modifications of different I kappa B molecules.

Ectopic Anus in Childhood

The treatment of ten cases of ectopic anus is presented in this paper. The association of constipation with perineal anus due to alignment disturbance of the external sphincter triple loop system during evacuation has been described by Hendren (1978), Leape and Ramenofsky (1978), Upadhyaya (1984) et al. Hendren, Leape and Ramenofsky described two valid surgical techniques for this association. In this paper we describe the effect of non-invasive treatment in patients affected by symptomatic "primary" perineal anus. We also describe the effect of posterior anal transplant via the perineum in six infants and children with vulvar anus. This approach gave good results within three months without having to perform more complex operative techniques (Peña for example). Posterior anal transplant leads not only to an esthetic improvement but also to an improvement in fecal continence, which is sometimes deficient due to reduced anorectal angulation. It appears to us that an adequate perineal spur plays an important complementary role in the complex mechanism which controls fecal continence.

X-ray Analysis at 2·0 Å Resolution of Mouse Submaxillary Renin Complexed with a Decapeptide Inhibitor CH-66, Based on the 4-16 Fragment of Rat Angiotensinogen

The structure of mouse submaxillary renin complexed with a decapeptide inhibitor, CH-66 (Piv-His-Pro-Phe-His-Leu-OH-Leu-Tyr-Tyr-Ser-NH 2), where Piv denotes a pivaloyl blocking group, and -OH- denotes a hydroxyethylene (-(S)CHOH-CH 2-) transition state isostere as a scissile bond surrogate, has been refined to an agreement factor of 0·18 at 2·0 Å resolution. The positions of 10,038 protein atoms and 364 inhibitor atoms (4 independent protein inhibitor complexes), as well as of 613 solvent atoms, have been determined with an estimated root-mean-square (r.m.s.) error of 0·21 Å. The r.m.s. deviation from ideality for bond distances is 0·026 Å, and for angle distances is 0·0543 Å. We have compared the three-dimensional structure of mouse renin with other aspartic proteinases, using rigid-body analysis with respect to shifts involving the domain comprising residues 190 to 302. In terms of the relative orientation of domains, mouse submaxillary renin is closest to human renin with only a 1·7° difference in domain orientation. Porcine pepsin (the molecular replacement model) differs structurally from mouse renin by a 6·9° domain rotation, whereas endothiapepsin, a fungal aspartic proteinase, differs by 18·8°. The triple proline loop (residues 292 to 294), which is structurally opposite the active-site "flap" (residues 72 to 83), gives renin a superficial resemblance to the fold of the retroviral proteinases. The inhibitor is bound in an extended conformation along the active-site cleft, and the hydroxyethylene moiety forms hydrogen bonds with both catalytic aspartate carboxylates. The complex is stabilized by hydrogen bonds between the main chain of the inhibitor and the enzyme. All side-chains of the inhibitor are in van der Waals contact with groups in the enzyme and define ten specificity sub-sites. This study shows how renin compact sub-sites due to the positioning of secondary structure elements, to complementary substitutions and to the residue composition of its loops close to the active site, leading to extreme specificity towards its prohormone substrate, angiotensinogen. We have analyzed the micro-environment of each of the buried charged groups in order to predict their ionization states.

Sublattice Strain, Ferridistortive Crystaland Ferrielastics

The concept of sublattice strain is for the first time introduced using a simple two-sublattice model. Ferridistortive crystals are defined as crystals whose spontaneous strains consist of two kinds of sublattice strains with opposite signs and different magnitudes. Ferrielastics are defined as ferridistortive crystals in which the sign of one of the sublattice strains can be reversed by external stresses, and a triple hysteresis loop can be observed in a stress-strain curve, just as in the case of ferrielectric crystal a triple hysteresis loop is observed in an electric field-polarization curve. It is suggested by using the two-sublattice model that ferrielastics are in fact possible under certain conditions.

Functional comparison between double and triple ileal loop pouches

Ileal pouch function in 35 patients operated upon by the same surgeon were compared. Seventeen of the patients had a double loop (J) ileal pouch-anal anastomosis (IPAA) and 18 a triple loop (S) pouch. The patients were examined a mean of 27.9 months and 5.1 months, respectively, after ileostomy closure. Ten of the S-pouch patients were evaluated more than 6 months (S greater than 6 months), mean 9.1 after ileostomy closure. There were no differences in the mean maximum resting pressures or maximum squeeze pressures between the groups. The incidence of daytime and nocturnal leakage was lower in the S-pouch group, 22 and 29 percent, than in the J group 29, and 53 percent. Though the mean maximum tolerated volume (MTV) of the S-pouch group was greater than the J group, the difference was not statistically significant. The difference in the mean compliance between the J- and S-pouch groups and the J and S greater than 6 months group was statistically significant (P less than 0.01) and (P less than 0.008). All the patients could evacuate spontaneously. The difference in the 24-hour frequency of defecation between the S greater than 6 months and J group was significant (P less than 0.05), but not between the S and J groups. The median frequency of nocturnal defecation between the S greater than 6 months and J pouch groups was significant (P less than 0.005), but not between the S and J groups. The triple loop S-pouches were more compliant than the J-pouches and had a better functional result as shown by a lower incidence of nocturnal leakage, and a lower frequency of defecation during the day and night.

Triple iterative loop technique for optimizing control of large-scale steady-state systems

A new approach for hierarchical system optimization and parameter estimation of a large-scale industrial process is described. This approach can be viewed as a hierarchical implementation of the approximate linear model approach with a three iterative loop structure. The internal double loop iteration where only model-based information is involved is a two-model approach. Augmentation is introduced to enforce and accelerate convergence in the internal double loop. The third iterative loop arises from the hierarchical implementation of the technique and involves coordination of price vectors to ensure balance between separable sub-optimization problems. The major advantages of this triple iterative loop configuration are that it significantly reduces the required on-line iterations in order to reach the optimum, especially when the process is linear or nearly linear and it has a balanced distribution of model–based computations in the internal double loop. Optimality and convergence conditions are examined...