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Добірка наукової літератури з теми "Operators of small groups"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "Operators of small groups"

Möllers, Jan, and Benjamin Schwarz. "Bessel operators on Jordan pairs and small representations of semisimple Lie groups." Journal of Functional Analysis 272, no. 5 (March 2017): 1892–955. http://dx.doi.org/10.1016/j.jfa.2016.10.026.

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Nadjafikhah, M., and A. Mokhtary. "Approximate Hamiltonian Symmetry Groups and Recursion Operators for Perturbed Evolution Equations." Advances in Mathematical Physics 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/568632.

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The method of approximate transformation groups, which was proposed by Baikov et al. (1988 and 1996), is extended on Hamiltonian and bi-Hamiltonian systems of evolution equations. Indeed, as a main consequence, this extended procedure is applied in order to compute the approximate conservation laws and approximate recursion operators corresponding to these types of equations. In particular, as an application, a comprehensive analysis of the problem of approximate conservation laws and approximate recursion operators associated to the Gardner equation with the small parameters is presented.

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Badea, Catalin, Vincent Devinck, and Sophie Grivaux. "Escaping a Neighborhood Along a Prescribed Sequence in Lie Groups and Banach Algebras." Canadian Mathematical Bulletin 63, no. 3 (October 2, 2019): 484–505. http://dx.doi.org/10.4153/s0008439519000560.

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AbstractIt is shown that Jamison sequences, introduced in 2007 by Badea and Grivaux, arise naturally in the study of topological groups with no small subgroups, of Banach or normed algebra elements whose powers are close to identity along subsequences, and in characterizations of (self-adjoint) positive operators by the accretiveness of some of their powers. The common core of these results is a description of those sequences for which non-identity elements in Lie groups or normed algebras escape an arbitrary small neighborhood of the identity in a number of steps belonging to the given sequence. Several spectral characterizations of Jamison sequences are given, and other related results are proved.

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Zeffane, Rachid. "Gender, individualism–collectivism and individuals’ propensity to trust: A comparative exploratory study." Journal of Management & Organization 26, no. 4 (November 27, 2017): 445–59. http://dx.doi.org/10.1017/jmo.2017.57.

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AbstractWe explore the impact of gender, individualism–collectivism on individual’s propensity to trust. The study draws on data from three groups of individuals in the United Arab Emirates: students; (n=370); small business owners/operators (n=324), and employed individuals (n=376). Three main hypotheses are tested. We develop and explore three main hypotheses. Statistical results reveal that females are generally more collectivist and less trusting than their males counterparts. Further analysis revealed that small business/operators are generally more trusting than the other cohorts of respondents. Propensity to trust was also found to be strongly associated with collectivist (rather than individualist) aspirations. Implications for future research and management practice are discussed.

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Haavik, Kjetil E. "Extended use of receiver groups: Theory, synthetic example, and noise considerations." GEOPHYSICS 85, no. 6 (October 13, 2020): P53—P66. http://dx.doi.org/10.1190/geo2019-0624.1.

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Receiver grouping is commonly used in marine towed-streamer seismic acquisition. Measurements from several receivers in a group are stacked to increase the signal-to-noise ratio of the resulting data and form an analog spatial antialiasing filter. I propose a method for extracting inline derivatives of the wavefield as additional measurements from the groups. This is achieved by multiplying the signal from the individual receivers in a group with predefined weights that corresponds to a finite-difference (FD) operator. The inline derivative(s) makes it possible to use multichannel sampling theorems to reconstruct the signal on a denser grid. Extraction of FD data from clusters of receivers is not a new concept, but I find that, by using the geometry of conventional streamer groups, it is possible to obtain FD data which are well suited for multichannel interpolation. The key to finding suitable FD operators is to recognize that it is not the ideal differentiation response we seek, but the impulse response of the group multiplied with the ideal differentiation response. Furthermore, under a Gaussian noise assumption, I derive formulas for the resulting noise level from sinc and higher order sinc interpolations. I find that the random noise level in the reconstructed data, when using higher order sinc interpolation, is expected to be higher than when using conventional sinc interpolation and will vary with respect to the distance from the original sampling points. The statistical analysis shows that it is beneficial to find FD operators with as small an [Formula: see text] norm as possible. A synthetic example shows that the proposed method of extracting FD operators and subsequent interpolation works very well. I foresee that the proposed method can be used to reduce the density of receivers (hydrophones or geophones) when designing new streamers or with existing equipment to improve the inline sampling.

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Barton, Susan S., Jo Mercer, and Charles J. Molnar. "Using Focus Groups to Determine Market Potential for Wildflower Sod." HortTechnology 6, no. 3 (July 1996): 271–76. http://dx.doi.org/10.21273/horttech.6.3.271.

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Two focus-group sessions were conducted to determine the market potential of a new horticultural product—wildflower sod. One session included homeowners with suburban lots and an interest in wildflowers. Another session included landscape professionals, property managers, and garden center operators. Participants viewed a slide presentation about the uses of wildflowers and wildflower sod, a videotape illustrating wildflower sod installation, and a demonstration plot planted with wildflower sod. The discussion was conducted by an unbiased facilitator. Participants cited the instant effect of wildflower sod as a major advantage. The price was viewed as acceptable for small areas, especially if sod was broken apart and spaced as plugs. Comments from the participants were used to develop an ideal product description and yielded merchandising recommendations.

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Duglio, Bonadonna, Letey, Peira, Zavattaro, and Lombardi. "Tourism Development in Inner Mountain Areas—The Local Stakeholders’ Point of View through a Mixed Method Approach." Sustainability 11, no. 21 (October 28, 2019): 5997. http://dx.doi.org/10.3390/su11215997.

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Tourism in inner areas, especially in the mountains, is a complex phenomenon due to the different tourist’s needs and to the specific local features that vary considerably from one destination to another. Consequently, a unique tourism development strategy cannot be defined and adopted anywhere. When considering tourism-based territorial development in mountain areas, it is crucial to take the vision of local stakeholders into consideration. To drive different and/or unexpressed opinions towards shared tools, this study analyses the local stakeholder’s point of view using a mixed method consisting of a Delphi method followed by a Group Nominal Technique. The research was performed in Soana Valley, a small mountain community in the Northwestern Italian Alps. It involved 17 local stakeholders divided into three main groups—local administrators (n = 3), hospitality operators (9) and retailers (5). Results show how operators converge on three common aspects—local food product offering, territorial promotion and collaboration among operators, on which the community should focus to build a territorial integrated tourism offering.

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Barton, S. S., and J. Mercer. "An Evaluation of Focus Groups as a Technique to Determine the Market Potential for Wildflower Sod." HortScience 30, no. 4 (July 1995): 891E—891. http://dx.doi.org/10.21273/hortsci.30.4.891e.

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Анотація:

Two focus group sessions were conducted to determine the market potential for a new horticultural product, wildflower sod. One session included homeowners with suburban lots and an interest in wildflowers. Another session included landscape professionals, property managers, and garden center operators. Participants viewed a slide presentation about the uses of wildflowers and wildflower sod; a videotape illustrating wildflower sod installation; and a demonstration plot with wildflower sod planted at different spacings (solid, 50%, 25%, or plugs at 1”, 18”, or 24” centers) and at different times of year (fall, spring). The discussion was conducted by an unbiased facilitator. Participants cited the instant effect of wildflower sod as a major advantage. The price was viewed as acceptable for small areas, especially if sod was broken apart and spaced as plugs. Comments from participants were also used to develop an ideal product description and a marketing plan.

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Korsun, O. N., and E. I. Mikhaylov. "Identification of the Pilot as Part of the Crew Using Speech Spectral Transfer Function." Herald of the Bauman Moscow State Technical University. Series Instrument Engineering, no. 5 (128) (October 2019): 35–48. http://dx.doi.org/10.18698/0236-3933-2019-5-35-48.

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The paper deals with the problem of voice identification of the pilot as part of the crew, which is one of the ways to improve the interface of the cockpit of a modern aircraft. The main trends of pilot voice identification in the task of improving the cockpit interface are voice control of onboard equipment and accident investigation. We introduce a method for identifying the speakers personality using the speakers voice transfer function by frequency and the k-nearest neighbors data classification algorithm. Due to the nature of the task, identification was carried out for small groups of operators of up to four people. The main results of testing the proposed method on the experimental speech data that include 3 and 20 different isolated words are given. Findings of research show that the operator can be identified by a small number of code words with an accuracy of about 97--99 % when using the speakers voice transfer function by frequency. The paper also presents a comparison of the results of applying the methodology for pilots of helicopter aviation with the diagnosis of hearing loss and for a group of operators without diseases of the organs of hearing.

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Syahyuti, K. S. Indraningsih, D. K. S. Swastika, S. H. Susilowati, and S. Suharyono. "The role of stakeholders to support implementation of modern agricultural programs." IOP Conference Series: Earth and Environmental Science 892, no. 1 (November 1, 2021): 012024. http://dx.doi.org/10.1088/1755-1315/892/1/012024.

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Abstract The Ministry of Agriculture has implemented the Modern Agriculture Program since 2016 by distributing agricultural machinery to farmers, in order to improve Indonesian agriculture which is characterized by small scale, low productivity, low labor productivity, and national production that is not self-sufficient. The objective of this research is to analyze the role of stakeholders to support the implementation of the programs. South Sulawesi was chosen purposively as the research location. The interviewees are service institutions from central to regional, key informants, farmer groups, extension agents, agricultural machinery service providers, and individual farmers. The analysis used was stakeholder analysis. The results showed that the main actors in the Modern Agricultural Program were machinery operators and UPJA administrators. The beneficiaries of Modern Agricultural services are mainly the share and tenant farmers. The machinery operators have the strongest position. In terms of the external network, the machinery operators and “area brokers” are the most important parties and determine the operation of the machinery. In order for the Modern Agriculture Program to provide positive benefits to all parties, it is necessary to strive for a system of work with fair profit sharing and to provide wider opportunities for businessmen to take part in the program.

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Дисертації з теми "Operators of small groups"

Панфілов, Юрій Іванович. "Психологічні основи забезпечення ефективності спільної діяльності операторів військ протиповітряної оборони". Thesis, Українська інженерно-педагогічна академія, 2007. http://repository.kpi.kharkov.ua/handle/KhPI-Press/18362.

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Дисертація на здобуття наукового ступеня кандидата психологічних наук за фахом 19.00.03 – психологія праці, інженерна психологія. – Українська інженерно-педагогічна академія, Харків, 2007. Дисертація присвячена проблемі психологічного забезпечення ефективності спільної діяльності операторів з урахуванням психологічної сумісності. В дисертації проаналізовані основні науково-теоретичні підходи до визначення взаємозв’язку ефективності спільної діяльності і сформованої психологічної сумісності, які включали: структурний, функціональний і адаптивний підходи. Більш конкретно визначена структура психологічної сумісності та її значущі компоненти. В роботі аналізується діяльність операторів військ Протиповітряної оборони, які виконують завдання бойового чергування, представлена професіограма спеціальностей радіотехнічного та зенітно-ракетного профілю, в яких відображені психологічні вимоги до цих спеціальностей та встановлені професійно важливі якості операторів, сформованість яких дозволяє підвищити ефективність їхньої спільної діяльності. Визначені і згруповані внутрішні і зовнішні фактори, які впливають на ефективність спільної діяльності. В ході дослідження встановлено комплекс критеріїв кожного компонента психологічної сумісності, їх рівні, динаміка та умови формування. Визначені основні причини психологічної несумісності. Суб'єктам керівництва військових підрозділів розроблена і запропонована методика психологічного забезпечення ефективності спільної діяльності з урахуванням психологічної сумісності операторів.
Dissertation on the scientific degree of candidate of psychological sciences on speciality 19.00.03 – рsychology of labour, engineering psychology. – Ukrainian еngineering-рedagogical аcademy, Kharkov, 2007. Dissertation is devoted to the problem of the socially-psychological providing of the efficiency of the joint activity of operators taking into account psychological compatibility. In dissertation found out basic theoretical-conceptual approaches to the study of intercommunication of the joint activity and the problem of psychological compatibility, which include: structural, functional and adaptive approaches. The structure of psychological compatibility and its copulas with the effective joint activity is specified. Description of the activity of operators of Air defense troops, which execute the commons tasks, is given in the work, represented psychodrama requirements to necessary qualities of operators, purposeful influence on which allows to promote efficiency of their joint activity. The stress - factors, which influence on efficiency of joint activity are definite is grouped. They are separated into external and internal (psychological and socially-psychological). During the research certain meaningful components of psychological compatibility, their criteria levels and forming dynamics. Certain principal reasons of psychological incompatibility. As a result of the conducted research to the subjects of guidance of military subsections the special psychological methodic providing of the efficiency of joint activity taking into account psychological compatibility of operators was offered.

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He, Zhiping. "Spectra of localization operators on groups." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0024/NQ39271.pdf.

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Venieri, Laura. "Hypoelliptic differential operators in Heisenberg groups." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5634/.

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Gaebler, David. "Toeplitz Operators on Locally Compact Abelian Groups." Scholarship @ Claremont, 2004. https://scholarship.claremont.edu/hmc_theses/163.

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Given a function (more generally, a measure) on a locally compact Abelian group, one can define the Toeplitz operators as certain integral transforms of functions on the dual group, where the kernel is the Fourier transform of the original function or measure. In the case of the unit circle, this corresponds to forming a matrix out of the Fourier coefficients in a particular way. We will study the asymptotic eigenvalue distributions of these Toeplitz operators.

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Rumbelow, Sam. "Pseudodifferential operators on compact abelian groups with applications." Thesis, Swansea University, 2006. https://cronfa.swan.ac.uk/Record/cronfa42386.

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Pseudodifferential operators on compact groups are discussed, with an emphasis on the conditions for which the theorem of Hille and Yosida holds. Some preliminary functional analysis is given including the notion of regularly dissipative operators and Pontrjagin duality. The dual group is described, especially that it is discrete. Some important inequalities, such as Young's inequality, are also stated. Generalised trigonometrical polynomials and generalised Sobolev spaces are defined on the compact group G. A finite exhaustion of the dual space is used to define pointwise convergence and to give a condition for which a generalised Sobolev space is continuously embedded in C(G) and compactly embedded into a larger Sobolev space. The thesis defines k-ellipticity, k-smoothing operators and the k-parametrix, and proves their relation to the compactness of the embedding. It is shown that k-ellipticity is characterised by an inequality of Garding type. Some examples of pseudodifferential operators with constant coefficients are given. Another inequality of Garding type is proved for pseudodifferential operators with variable coefficients, and the existence of a weak solution to (A(x,D) - lambda)u = f is given under certain conditions on the adjoint A*(x,D). A variational solution of B[ϕ,u] = (ϕ,f) is found, and we prove a Garding type inequality for the sesquilinear form.

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Brieussel, Jeremie. "Selberg Zeta Functions and Transfer Operators for Modular Groups." Thesis, Uppsala University, Department of Mathematics, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-121406.

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Schwarzenberger, Fabian. "The Integrated Density of States for Operators on Groups." Doctoral thesis, Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-123241.

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This thesis is devoted to the study of operators on discrete structures. The operators are supposed to be self-adjoint and obey a certain translation invariance property. The discrete structures are given as Cayley graphs via finitely generated groups. Here, sofic groups and amenable groups are in the center of our considerations. Note that every finitely generated amenable group is sofic. We investigate the spectrum of a discrete self-adjoint operator by studying a sequence of finite dimensional analogues of these operators. In the setting of amenable groups we obtain these approximating operators by restricting the operator in question to finite subsets Qn , n ∈ N. These finite dimensional operators are self-adjoint and therefore admit a well-defined normalized eigenvalue counting function. The limit of the normalized eigenvalue counting functions when |Qn | → ∞ (if it exists) is called the integrated density of states (IDS). It is a distribution function of a probability measure encoding the distribution of the spectrum of the operator in question on the real axis. In this thesis, we prove the existence of the IDS in various geometric settings and for different types of operators. The models we consider include deterministic as well as random situations. Depending on the specific setting, we prove existence of the IDS as a weak limit of distribution functions or even as a uniform limit. Moreover, in certain situations we are able to express the IDS via a semi-explicit formula using the trace of the spectral projection of the original operator. This is sometimes referred to as the validity of the Pastur-Shubin trace formula. In the most general geometric setting we study, the operators are defined on Cayley graphs of sofic groups. Here we prove weak convergence of the eigenvalue counting functions and verify the validity of the Pastur-Shubin trace formula for random and non-random operators . These results apply to operators which not necessarily bounded or of finite hopping range. The methods are based on resolvent techniques. This theory is established without having an ergodic theorem for sofic groups at hand. Note that ergodic theory is the usual tool used in the proof of convergence results of this type. Specifying to operators on amenable groups we are able to prove stronger results. In the discrete case, we show that the IDS exists uniformly for a certain class of finite hopping range operators. This is obtained by using a Banach space-valued ergodic theorem. We show that this applies to eigenvalue counting functions, which implies their convergence with respect to the Banach space norm, in this case the supremum norm. Thus, the heart of this theory is the verification of the Banach space-valued ergodic theorem. Proceeding in two steps we first prove this result for so-called ST-amenable groups. Then, using results from the theory of ε-quasi tilings, we prove a version of the Banach space-valued ergodic theorem which is valid for all amenable groups. Focusing on random operators on amenable groups, we prove uniform existence of the IDS without the assumption that the operator needs to be of finite hopping range or bounded. Moreover, we verify the Pastur-Shubin trace formula. Here we present different techniques. First we show uniform convergence of the normalized eigenvalue counting functions adapting the technique of the Banach space-valued ergodic theorem from the deterministic setting. In a second approach we use weak convergence of the eigenvalue counting functions and additionally obtain control over the convergence at the jumps of the IDS. These ingredients are applied to verify uniform existence of the IDS. In both situations we employ results from the theory of large deviations, in order to deal with long-range interactions.

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Schwarzenberger, Fabian. "The Integrated Density of States for Operators on Groups." Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-138523.

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This book is devoted to the study of operators on discrete structures. The operators are supposed to be self-adjoint and obey a certain translation invariance property. The discrete structures are given as Cayley graphs via finitely generated groups. Here, sofic groups and amenable groups are in the center of our considerations. Note that every finitely generated amenable group is sofic. We investigate the spectrum of a discrete self-adjoint operator by studying a sequence of finite dimensional analogues of these operators. In the setting of amenable groups we obtain these approximating operators by restricting the operator in question to finite subsets Qn , n ∈ N. These finite dimensional operators are self-adjoint and therefore admit a well-defined normalized eigenvalue counting function. The limit of the normalized eigenvalue counting functions when |Qn | → ∞ (if it exists) is called the integrated density of states (IDS). It is a distribution function of a probability measure encoding the distribution of the spectrum of the operator in question on the real axis. We prove the existence of the IDS in various geometric settings and for different types of operators. The models we consider include deterministic as well as random situations. Depending on the specific setting, we prove existence of the IDS as a weak limit of distribution functions or even as a uniform limit. Moreover, in certain situations we are able to express the IDS via a semi-explicit formula using the trace of the spectral projection of the original operator. This is sometimes referred to as the validity of the Pastur-Shubin trace formula. In the most general geometric setting we study, the operators are defined on Cayley graphs of sofic groups. Here we prove weak convergence of the eigenvalue counting functions and verify the validity of the Pastur-Shubin trace formula for random and non-random operators . These results apply to operators which not necessarily bounded or of finite hopping range. The methods are based on resolvent techniques. This theory is established without having an ergodic theorem for sofic groups at hand. Note that ergodic theory is the usual tool used in the proof of convergence results of this type. Specifying to operators on amenable groups we are able to prove stronger results. In the discrete case, we show that the IDS exists uniformly for a certain class of finite hopping range operators. This is obtained by using a Banach space-valued ergodic theorem. We show that this applies to eigenvalue counting functions, which implies their convergence with respect to the Banach space norm, in this case the supremum norm. Thus, the heart of this theory is the verification of the Banach space-valued ergodic theorem. Proceeding in two steps we first prove this result for so-called ST-amenable groups. Then, using results from the theory of ε-quasi tilings, we prove a version of the Banach space-valued ergodic theorem which is valid for all amenable groups. Focusing on random operators on amenable groups, we prove uniform existence of the IDS without the assumption that the operator needs to be of finite hopping range or bounded. Moreover, we verify the Pastur-Shubin trace formula. Here we present different techniques. First we show uniform convergence of the normalized eigenvalue counting functions adapting the technique of the Banach space-valued ergodic theorem from the deterministic setting. In a second approach we use weak convergence of the eigenvalue counting functions and additionally obtain control over the convergence at the jumps of the IDS. These ingredients are applied to verify uniform existence of the IDS. In both situations we employ results from the theory of large deviations, in order to deal with long-range interactions.

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Martin, Gary. "Connecting the church through small groups Worthington Christian Church's small groups focus for 2005 /." Theological Research Exchange Network (TREN), 2006. http://www.tren.com/search.cfm?p031-0168.

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Moreno, Lars. "Informal Leadership in Small Groups." Thesis, Mittuniversitetet, Institutionen för samhällsvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-16681.

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This study identified factors and variables of informal leadership in small groups with different gender composition (Men, women and mixed groups) and goal orientation (competition and cooperation). Behavioral dominance patterns (Information Sheet, pencil, decision sheet) and number of verbal interventions were compared to the main informal leadership factors identified in the groups. There were 24 participants (12 men and 12 women). Among the main variables and factors identified, there were some that had a higher possibility to appear than other. There was no significant difference of the factors and variables between women and men. Communication variables were more likely to be present in groups with the goal of cooperation as for the goal of competition. Guidance variables were more likely to be present in women groups than in men groups and mixed groups. There was a significant correlation between the factor’s Communication, Character and Guidance with the number of interventions and behavioral dominance patterns.

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Книги з теми "Operators of small groups"

service), SpringerLink (Online, ed. Convolution Operators on Groups. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2011.

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Derighetti, Antoine. Convolution Operators on Groups. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-20656-6.

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service), SpringerLink (Online, ed. Matrix convolution operators on groups. Berlin: Springer, 2008.

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Chu, Cho-Ho. Matrix Convolution Operators on Groups. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-69798-5.

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Robinson, Derek W. Elliptic operators and Lie groups. Oxford: Clarendon Press, 1991.

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J, Mahaney C., ed. Why small groups? Gaithersburg, MD: People of Destiny International, 1996.

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Growing small groups. Kansas City, Mo: Beacon Hill Press of Kansas City, 1995.

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Riley, Betsy. Small groups manual. Fayetteville, GA: Worldwide Discipleship Association, 1992.

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J, Enright Thomas, and Stanke Ronald J. 1954-, eds. Differential operators and highest weight representations. Providence, RI: American Mathematical Society, 1991.

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Wong, M. W., and Hongmei Zhu, eds. Pseudo-Differential Operators: Groups, Geometry and Applications. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-47512-7.

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Частини книг з теми "Operators of small groups"

Bump, Daniel. "Compact Operators." In Lie Groups, 17–20. New York, NY: Springer New York, 2004. http://dx.doi.org/10.1007/978-1-4757-4094-3_3.

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Bump, Daniel. "Compact Operators." In Lie Groups, 19–22. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-8024-2_3.

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Recasens, Jordi. "Vague Groups." In Indistinguishability Operators, 201–15. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-16222-0_12.

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van Schaik, Leon, Nigel Bertram, Shane Murray, Deborah Rowe, and Helena Harry. "Small Groups." In Suburbia Reimagined, 79–97. New York, NY : Routledge, 2018.: Routledge, 2018. http://dx.doi.org/10.4324/9781315111315-6.

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Hafez, Kai, and Anne Grüne. "Small groups." In Foundations of Global Communication, 187–215. London: Routledge, 2022. http://dx.doi.org/10.4324/9781003255239-8.

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Ruzhansky, Michael, and Ville Turunen. "Groups." In Pseudo-Differential Operators and Symmetries, 429–44. Basel: Birkhäuser Basel, 2010. http://dx.doi.org/10.1007/978-3-7643-8514-9_11.

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Zhu, Kehe. "Small Hankel Operators." In Analysis on Fock Spaces, 267–85. Boston, MA: Springer US, 2012. http://dx.doi.org/10.1007/978-1-4419-8801-0_7.

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Konno, Hitoshi. "The Vertex Operators." In Elliptic Quantum Groups, 49–60. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7387-3_5.

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Helgason, Sigurdur. "Invariant differential operators." In Groups and Geometric Analysis, 233–344. Providence, Rhode Island: American Mathematical Society, 2000. http://dx.doi.org/10.1090/surv/083/03.

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Ruzhansky, Michael, and Ville Turunen. "Topological Groups." In Pseudo-Differential Operators and Symmetries, 445–89. Basel: Birkhäuser Basel, 2010. http://dx.doi.org/10.1007/978-3-7643-8514-9_12.

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Тези доповідей конференцій з теми "Operators of small groups"

Killinger, Arthur G., and Mark J. O’Connell. "Diesel Generator Owner’s Groups Improve Power Plant Operations and Maintenance." In ASME 2006 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ices2006-1443.

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Diesel generator sets are installed at nuclear power plants to provide emergency power to ensure safe shut down of the reactor in the event of an accident. In the United States, all nuclear power plants belong to one of six different Diesel Generator Owner’s Groups. Some groups have been in existence for over 17 years and the members have all benefited from their participation. In the past three years, the Diesel Generator Owner’s Group concept has spread and two new groups have been formed among a number of independent diesel generator power plant owners and operators in Latin America and the Caribbean area. This paper describes: (1) how electric power plants, large and small, have formed Diesel Generator Owner’s Groups, (2) how better working relationships between the power plants and the engine manufacturer have been established, and (3) how involvement in a strong owner’s group provides significant benefits to the members. The primary goal of the groups is to increase reliability and improve performance of the diesel engines at the respective power plants. Typical objectives of effective Diesel Generator Owner’s Groups include: • Provide a mechanism for rapid resolution of specific problems with the diesel engine, generator and auxiliary systems, • Provide improved communications among the owners and the diesel generator manufacturer, • Develop a group of “technical experts” and expand that knowledge base to other plant personnel, and • Identify methods to improve diesel engine generator and overall power plant performance, reliability, availability and safety. Active participation in Diesel Generator Owner’s Group has resulted in real payback for the owners and manufacturers alike. To illustrate this fact, several unique diesel engine problems are described along with the approach the Diesel Generator Owner’s Groups used to resolve the problems. Finally, overall diesel generator reliability and availability have improved. These groups have worked to develop the best possible technical environment to continue improving diesel generator power plant performance, operation and maintenance.

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Martins, Diogo S., and Maria da Graça C. Pimentel. "Browsing interaction events in recordings of small group activities via multimedia operators." In the 18th Brazilian symposium. New York, New York, USA: ACM Press, 2012. http://dx.doi.org/10.1145/2382636.2382689.

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Zihlmann, Livia, Mike Parker, and Luke Malsam. "Surface Tubing Temperature Transducers Reduce Damage to Downhole Equipment Following a Downhole Gauge Failure." In SPE Gulf Coast Section Electric Submersible Pumps Symposium. SPE, 2021. http://dx.doi.org/10.2118/204490-ms.

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Abstract Downhole sensors gather vital data for the health of an ESP system. Not only do the sensor readings help indicate the flow pattern; they also help indicate further issues such as plugging and degradation of the ESP system. Once a system has grounded on a single phase, sensor readings are lost, and operators must rely on current and frequency for the system to operate efficiently. In unconventional applications of ESP, operators see a small difference between no load, no flow and gas locking conditions. This small difference is due to the de-rating of motors used in order to get the fluid to surface in the severe applications. When the sensor readings typically are lost, operators are no longer able to accurately diagnose the reason for a shutdown. Adding the Tubing Temperature Transducers (TTT's) helps regain an indication of motor temperature along with load on the system. When operators have a drop in the tubing temperature this indicates the system is not able to get as much fluid to surface either indicating gas locking or a no-load condition which results in heating of the downhole system, particularly the motor. All these possible scenarios cause degradation of the ESP equipment and can cause pre-mature failure. If the system is set up with TTT's operators can shut-in the well to avoid extended periods of excessive heating caused by either gas locking or no flow conditions. Single phase to ground conditions occur frequently, however this paper does not address the root cause of a single-phase grounds, rather it addresses what the operator can do to operate efficiently when a unit has grounded out a single phase.

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Crespo Coelho da Silva Pinto, Alexandre, Francisco Felipe da Silva Júnior, and Diogo Cunha dos Reis. "Analysis of Baggage Handling in Airplane Cargo Hold of Commercial Airplane: A Case Study in Ergonomics." In Applied Human Factors and Ergonomics Conference. AHFE International, 2022. http://dx.doi.org/10.54941/ahfe100782.

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Ergonomic studies related to commercial aviation have focused on improvements related to drivers’ commands and cockpit. However, a small number of studies are devoted to the ground manual transport related to the airplane cargo hold. This study aimed to analyze the biomechanical overload in manual load lifting tasks among ramp operators of commercial airplanes through the application of NIOSH and RULA methods. Two cases involving luggage loading and unloading activities were observed. Data collection was performed with a ramp operator, which photos and filming of activities and workplace during passenger boarding and disembarking of passengers. The biomechanical factors observed and analyzed in this study, with the application of NIOSH and RULA methods, allowed generating values that indicated that luggage loading and unloading activities bring high biomechanical risk for both the manual load lifting activity and for the postures used during luggage handling, which may cause health problems to ramp operators.

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Rynes, Matthew, Leila Ghanbari, Jay Jia Hu, Daniel Sousa Schulman, Gregory Johnson, Michael Laroque, and Suhasa B. Kodandaramaiah. "Principles of Computer Numerical Control Applied to Small Research Animal Surgical Procedures." In 2018 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/dmd2018-6959.

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The tools and techniques available for systems neuroscientists for neural recording and stimulation during behavior have become plentiful in the last decade. The tools for implementing these techniques in vivo, however, have not advanced respectively. The use of these techniques requires the removal of sections of skull tissue without damaging the underlying tissue, which is a very delicate procedure requiring significant training. Automating a part of the tissue removal processes would potentially enable more precise procedures to be performed, and it could democratize these procedres for widespread adoption by neuroscience lab groups. Here, we describe the ‘Craniobot’, a microsurgery platform that combines automated skull surface profiling with a computer numerical controlled (CNC) milling machine to perform a variety of microsurgical procedures in mice. Surface profiling by the Craniobot has micrometer precision, and the surface profiling information can be used to perform milling operations with relatively quick, allowing high throughput. We have used the Craniobot to perform skull thinning, small to large craniotomies, as well as drilling pilot holes for anchoring cranial implants. The Craniobot is implemented using open source and customizable machining practices and can be built with of the shelf parts for under $1000.

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Ruggiero, T. "Realignment of ASME Operations Maintenance Committee: Improving Responsiveness and Efficiency." In ASME/NRC 2017 13th Pump and Valve Symposium. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvs2017-3533.

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The O&M Code was developed when it was decided to move Pump and Valve Inservice Testing (IST) Requirements from the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel (B&PV) Code, Section XI to a standalone Code. The Code review process structure at the time was quite small and generally consisted of changing Section XI Subsections IWP and IWV into OM language. At the same time, new testing techniques were being developed that included check valve condition monitoring and current trace testing of motor actuated valves. This necessitated adding groups that were specific to these new initiatives. Although that was several decades ago, these groups remained and, over the years, it was identified that actions, such as Inquiries, were taking much too long to process. This became abundantly clear with the development of the newly published Mandatory Appendix IV for Air Operated Valve Testing. This paper discusses how the Code Committee became the organization that it is and how a new realignment will streamline the Code process and make it more efficient and responsive to the industry/regulatory needs. Paper published with permission.

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Bandstra, Daryl, Thomas Dessein, Aaron Schwing, Jim Andrew, and Jason Moritz. "Reliability Performance Benchmarks for Low Vapor Pressure Liquids Pipelines." In 2020 13th International Pipeline Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ipc2020-9367.

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Abstract The pipeline industry is increasingly utilizing reliability methods as a basis for decision-making when managing the integrity of pipeline systems. In this paper we present a methodology for developing reliability benchmarks for onshore low vapour pressure (LVP) liquids transmission pipelines to enable an operator to evaluate the performance of their pipelines relative to their industry peers. The goals of this methodology are to use an approach that is calibrated to historical performance, that remains interpretable, that can readily be adjusted over time, and that reflects the increased sensitivity of High Consequence Areas (HCAs). On this basis, the Top Quartile (Q1) and Average historical environmental performance of the top 20 largest liquid pipelines operators were identified as two primary benchmarks of interest. Top Quartile (Q1) environmental performance represents an industry leading benchmark performance while the Average historical environmental performance is representative of typical pipelines. This group of operators was selected on the basis that these major companies operate pipeline networks with comparable complexity, similar integrity challenges and a diverse range of operating environments (urban, rural, etc.). In addition, the length of their respective systems decreases the impact of small sample size issues. The dataset used for calculating the historical environmental performance of these operators was the 2010–2018 PHMSA Hazardous Liquids Incidents and Annual Mileage datasets. The framework presented in this paper, allows specific reliability benchmarks to be calculated for a given pipeline dependent on the environmental consequences associated with failure of the line. Consequences are considered in order to be risk-consistent between pipelines with different outflow potentials and different land use surroundings (HCA vs. Non-HCA). The heightened sensitivity of HCA areas is considered by including an impact ratio in calculating the reliability benchmarks. These benchmarks can be used to identify pipelines for additional scrutiny when the expected environmental performance does not meet benchmark levels and to flag areas for further evaluation. Quantifying the failure potential of pipeline segments gives operators insights into which maintenance actions will make the most effective use of the available resources to improve reliability. These benchmarks are calculated directly from historical data using a simple methodology and are easily recalibrated in the future as the performance of the pipeline industry continuously improves to meet increasing societal expectations.

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Verdeil, Julien, and Julien Manach. "Longer Tiebacks by Electrification and Remote Power." In Offshore Technology Conference. OTC, 2021. http://dx.doi.org/10.4043/31130-ms.

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Abstract Standard field architecture is generally based on topsides production and distribution of power and chemicals necessary to operate equipment in drill centers. The paper will present efficient field architectures adapted to operate remote tie-backs with different combinations of subsea electrical power distribution, remote power generation and storage, and improved ways to mitigate corrosion, hydrates and wax issues for long tie-backs. Developing remote resources requires several technology bricks that enable a cost effective and reliable technical solution. To reduce the CAPEX, the main objective is to reduce the number of tubes typically with one single heated flowline to avoid a long and costly service line or with one small power cable and local distribution of power to avoid a heavy and expensive large umbilical. Alternatively, power can be generated and stored at drill center location and chemicals can also be managed locally with limited OPEX. A significant focus was done recently on technology developments enabling long distance tie-back developments. Domain of application and interest of each technology is generally well known and the delivered value is well presented. Looking for the most appropriate combination of technologies on a new field development is now the new challenge to figure out new opportunities. This paper proposes to group the long distance tie-backs fields in three main categories based on extensive studies done for several operators and to present the best architecture for each category. The first category groups very long distance single end tie-backs for which a cold flow system combined with full electrical equipment at drill center location is adapted. The second one is applicable for more consequent development where several drill centers are combined to one long and heated export line; with subsea electrical distribution to power each branch of the remote field and local management of chemicals at each drill center. The third category groups all daisy chain developments for which a heated line gathers the production coming from each fully electrical drill center. Each field development can generally be categorized in one out of the three categories presented in this paper. Based on this categorization, the right combination of low carbon and reliable new technologies enables valuable development of long tie-backs and then increases utilization area of each existing asset.

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Alvi, Muhammad Awais Ashfaq, Mesfin Belayneh, Arild Saasen, and Sulalit Bandyopadhyay. "Impact of Various Nanoparticles on the Viscous Properties of Water Based Drilling Fluids." In ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/omae2021-62612.

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Abstract Properly designed drilling fluid is a key element in achieving safe and effective drilling operations. Rheological parameters of drilling fluid determine the equivalent circulation density, the pump pressure, and hole cleaning efficiency. Also, they have a significant role in predicting the stability of drilling fluid under static and low shear rates. The chemical composition of the drilling fluid controls the rheological parameters. Recently, studies have shown that a small concentration of nanosized materials in the drilling fluid can substantially impact the rheological parameters of the drilling fluids. In this study, various nanoparticles (NPs) with different shapes, sizes, and surface charges were used to investigate their impact on the viscous properties of water-based drilling fluid. Bentonite and KCl water-based drilling fluids were used as the base fluids. NPs such as Iron oxide, Silica (SiO2), and multi-walled carbon nanotubes (MWCNT) were added to these base fluids. Also, surface functionalization of the NPs with polymer and functional groups such as -OH and -COOH groups was done to compare the effect of bare NPs with surface functionalized NPs. Hershel-Buckley model with dimensionless shear rates was used to calculate the low and high shear curvature exponents, surplus stress, and yield stress of the samples. Results indicate that NPs alter drilling fluid’s viscous properties based on their sizes, shapes, and surface charges. Moreover, the functionalization of NPs also modifies the properties based on the functional group attached to the NPs surface. This work shows that changing the size, shape, and surface charge of NPs has impact on viscous parameters, and NPs with different properties can fine-tune the fluid’s viscous properties based on the requirement for drilling fluid.

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Matthes, R., O. Richter, and G. Rudolph. "Generalized signature operators and spectral triples for the Kronecker foliation." In Noncommutative Geometry and Quantum Groups. Warsaw: Institute of Mathematics Polish Academy of Sciences, 2003. http://dx.doi.org/10.4064/bc61-0-9.

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Звіти організацій з теми "Operators of small groups"

Holod, Petro I. Geometric Quantization, Cohomology Groups and Intertwining Operators. GIQ, 2012. http://dx.doi.org/10.7546/giq-1-2000-95-104.

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Keefer, Philip, and Benjamin Roseth. Grand Corruption in the Contracting Out of Public Services: Lessons from a Pilot Study in Colombia. Inter-American Development Bank, June 2021. http://dx.doi.org/10.18235/0003335.

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Do targeted transparency interventions reduce corrupt behavior when corrupt actors are few and politically influential; their behavior imposes small costs on numerous individuals; and corrupt behavior is difficult to observe? Results from a study of informal audits and text messages to parents, meant to curb corruption in the School Meals Program of Colombia, suggests that they can. Theory is pessimistic that transparency interventions can change the behavior of actors who exert significant influence over supervisory authorities. Moreover, inherent methodological obstacles impede the identification of treatment effects. Results substantiate the presence of these obstacles, especially considerable spillovers from treated to control groups. Despite spillovers, we find that parental and operator behavior are significantly different between treatment and control groups. Additional evidence explains why operator behavior changed: out of concern that systematic evidence of corrupt behavior would trigger enforcement actions by high-level enforcement agencies outside of the political jurisdictions where they are most influential.

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Regenwetter, Michel. Testing Transitivity and Related Axioms of Preference for Individuals and Small Groups. Fort Belvoir, VA: Defense Technical Information Center, September 2008. http://dx.doi.org/10.21236/ada586703.

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Turnley, Jessica G. Cross-Cultural Competence and Small Groups: Why SOF Are the Way SOF Are. Fort Belvoir, VA: Defense Technical Information Center, March 2011. http://dx.doi.org/10.21236/ada541961.

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Fiedler, Fred. The Contribution of Group Members' Cognitive Resources to the Effectiveness of Small Groups. Fort Belvoir, VA: Defense Technical Information Center, July 1990. http://dx.doi.org/10.21236/ada226005.

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Allock, Harry R., and Charles G. Cameron. The Synthesis and Characterization of Small Molecule and Photo-Cross- Linkable High Polymeric Phosphazenes Bearing Cinnamate Groups. Fort Belvoir, VA: Defense Technical Information Center, May 1994. http://dx.doi.org/10.21236/ada279782.

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Price, Roz. Access to Climate Finance by Women and Marginalised Groups in the Global South. Institute of Development Studies (IDS), May 2021. http://dx.doi.org/10.19088/k4d.2021.083.

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This paper examines the issue of management of climate finance in the Global South. It acknowledges the efforts made by the various stakeholders so far but seeks to advance a clarion call for a more inclusive and targeted approach in dealing with climate change. The authors highlight the limited role played by least developed countries and small island developing states in contributing to the conversation on climate change. The authors emphasize the need for enhancing the role of the most vulnerable countries, marginalized groups, and indigenous peoples in the management of climate change. This rapid review focusses on the access to the Green Climate Fund by local civil society organisations (CSOs), indigenous peoples, and women organizations within the Global South. The authors observe that there still exist barriers to climate finance by local actors in the Global South. The authors note the need for more significant engagement of all local actors and the need to devolve climate finance to the lowest level possible to the most vulnerable groups. Particularly, climate finance should take into consideration gender equality in any mitigation measures. The paper also highlights the benefits of engaging CSOs in the engagement of climate finance. The paper argues that local actors have the potential to deliver more targeted, context-relevant, and appropriate climate adaptation outcomes. This can be attributed to the growing movement for locally-led adaptation, a new paradigm where decisions over how, when, and where to adapt are led by communities and local actors. There is also a need to build capacities and strengthen institutions and organisations. Further, it is important to ensure transparency and equitable use and allocation of climate finance by all players.

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Allik, Mirjam, Dandara Ramos, Marilyn Agranonik, Elzo Pereira Pinto Junior, Maria Yury Ichihara, Mauricio Barreto, Alastair Leyland, and Ruth Dundas. Developing a Small-Area Deprivation Measure for Brazil. University of Glasgow, May 2020. http://dx.doi.org/10.36399/gla.pubs.215898.

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This report describes the development of the BrazDep small-area deprivation measure for the whole of Brazil. The measure uses the 2010 Brazilian Population Census data and is calculated for the smallest possible geographical area level, the census sectors. It combines three variables – (1) percent of households with per capita income ≤ 1/2 minimum wage; (2) percent of people not literate, aged 7+; and (3) average of percent of people with inadequate access to sewage, water, garbage collection and no toilet and bath/shower – into a single measure. Similar measures have previously been developed at the census sector level for some states or municipalities, but the deprivation measure described in this report is the first one to be provided for census sectors for the whole of Brazil. BrazDep is a measure of relative deprivation, placing the census sectors on a scale of material well-being from the least to the most deprived. It is useful in comparing areas within Brazil in 2010, but cannot be used to make comparisons across countries or time. Categorical versions of the measure are also provided, placing census sectors into groups of similar levels of deprivation. Deprivation measures, such as the one developed here, have been developed for many countries and are popular tools in public health research for describing the social patterning of health outcomes and supporting the targeting and delivery of services to areas of higher need. The deprivation measure is exponentially distributed, with a large proportion of areas having a low deprivation score and a smaller number of areas experiencing very high deprivation. There is significant regional variation in deprivation; areas in the North and Northeast of Brazil have on average much higher deprivation compared to the South and Southeast. Deprivation levels in the Central-West region fall between those for the North and South. Differences are also great between urban and rural areas, with the former having lower levels of deprivation compared to the latter. The measure was validated by comparing it to other similar indices measuring health and social vulnerability at the census sector level in states and municipalities where it was possible, and at the municipal level for across the whole of Brazil. At the municipal level the deprivation measure was also compared to health outcomes. The different validation exercises showed that the developed measure produced expected results and could be considered validated. As the measure is an estimate of the “true” deprivation in Brazil, uncertainty exists about the exact level of deprivation for all of the areas. For the majority of census sectors the uncertainty is small enough that we can reliably place the area into a deprivation category. However, for some areas uncertainty is very high and the provided estimate is unreliable. These considerations should always be kept in mind when using the BrazDep measure in research or policy. The measure should be used as part of a toolkit, rather than a single basis for decision-making. The data together with documentation is available from the University of Glasgow http: //dx.doi.org/10.5525/gla.researchdata.980. The data and this report are distributed under Creative Commons Share-Alike license (CC BY-SA 4.0) and can be freely used by researchers, policy makers or members of public.

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Coyner, Kelley, and Jason Bittner. Automated Vehicles and Infrastructure Enablers. SAE International, March 2022. http://dx.doi.org/10.4271/epr2022008.

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Manufacturers and developers of automated vehicles (AVs) often maintain that no new infrastructure enablers are needed to achieve full AV deployment aside from existing infrastructure investments (e.g., connected traffic signals, designated stops, booking software, mobile applications, separated lanes). These groups hold that a state-of-good-repair and clean lane markings are sufficient; however, much of the US receives poor grades when it comes to these features. What do infrastructure owners and operators need to know about what constitutes effective lane markings or what to prioritize in terms of safety and mobility? How do policy considerations effect these choices? Automated Vehicles and Infrastructure Enablers the first in a series on AVs and infrastructure—considers ways in which infrastructure can speed or delay deployment, mitigate hazards, and capture benefits related to AV roll-out. Some of these benefits include accessibility, safety, reduced climate impacts, and integrated supply chain logistics.

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Delmer, Deborah P., Douglas Johnson, and Alex Levine. The Role of Small Signal Transducing Gtpases in the Regulation of Cell Wall Deposition Patterns in Plants. United States Department of Agriculture, August 1995. http://dx.doi.org/10.32747/1995.7570571.bard.

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The combined research of the groups of Delmer, Levine and Johnson has led to a number of interesting findings with respect to the function of the small GTPase Rac in plants and also opened up new leads for future research. The results have shown: 1) The Rac13 protein undergoes geranylgeranlyation and is also translocated to the plasma membrane as found for Rac in mammals; 2) When cotton Rac13 is highly- expressed in yeast, it leads to an aberrant phenotype reminiscent of mutants impaired in actin function, supporting a role for Rac13 in cytoskeletal organization; 3) From our searches, there is no strong evidence that plants contain homologs of the related CDC42 genes found in yeast and mammals; 4) We have identified a rather unique Rac gene in Arabidopsis that has unusual extensions at both the N- and C-terminal portions of the protein; 5) New evidence was obtained that an oxidative burst characterized by substantial and sustained production of H202 occurs coincident with the onset of secondary wall synthesis in cotton fibers. Further work indicates that the H202 produced may be a signal for the onset of this phase of development and also strongly suggests that Rac plays an important role in signaling for event. Since the secondary walls of plants that contain high levels of lignin and cellulose are the major source of biomass on earth, understanding what signals control this process may well in the future have important implications for manipulating the timing and extent of secondary wall deposition. 6) When the cotton Rac13 promoter is fused to the reporter gene GUS, expression patterns in Arabidopsis indicate very strong and specific expression in developing trichomes and in developing xyelm. Since both of these cell types are engaged in secondary wall synthesis, this further supports a role for Rac in signaling for onset of this process. Since cotton fibers are anatomically defined as trichomes, these data may also be quite useful for future studies in which the trichomes of Arabidopsis may serve as a model for cotton fiber development; the Rac promoter can therefore be useful to drive expression of other genes proposed to affect fiber development and study the effects on the process; 7) The Rac promoter has also been shown to be the best so far tested for use in development of a system for transient transformation of developing cotton fibers, a technique that should have many applications in the field of cotton biotechnology; 8) One candidate protein that may interact with Rac13 to be characterized further in the future is a protein kinase that may be analogous to the PAK kinase that is known to interact with Rac in mammals.

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