161,504 research outputs found
Statistical energy analysis modelling of complex structures as coupled sets of oscillators: ensemble mean and variance energy
No full textExpressions are derived for the ensemble means and variances of the subsystem energies of built-up systems comprising two subsystems. The approach is based on the Statistical Energy Analysis of two spring-coupled oscillators and sets of oscillators, or coupled continuous subsystems, described by Mace and Ji [The statistical energy analysis of coupled sets of oscillators, Proceedings of the Royal Society A 1824 (2007)]. The paper focuses on spring coupling, although similar results hold for more general forms of conservative coupling. Randomness is introduced into the system by assuming that the natural frequency spacings in each subsystem conform to certain statistical distributions. A “coupling coefficient parameter” is introduced which, together with the “coupling strength parameter” defined by Mace and Ji (2007), accounts for the statistics of the coupling stiffness. Various approximations and assumptions are made. It is seen that the variance of the excited subsystem depends primarily on the variance of the input power, which in turn depends on the variance of the number of modes of the excited subsystem in the frequency band of excitation and their mode shapes. The variance of the undriven subsystem, on the other hand, depends primarily on the variance of the intermodal coupling coefficients, which in turn depend on the variances of the number of in-band modes of both subsystems and their mode shapes. The cases of Poisson and Gaussian Orthogonal Ensemble natural frequency spacing statistics are considered. Numerical examples of two plates coupled by one or a number of springs are presented
Sublime-sound-of-the-one-hand [Ryōan-ji]
No full textRyoan-ji is the ‘quintessential example of a karesansui dry landscape garden’ (UNESCO 1993: 41); it is a World Heritage site; an iconic site of meditation and contemplation; and an inspirational resource for a long-lasting series of exquisitely spacious compositions and visual art works by John Cage, among many other artists. Yet if vision is a ‘privileged sense in the Zen arts’ (Cox 2003: 103), what do we learn about the everyday experience of Ryōan-ji from a soundscape perspective? Despite its contemplative intentions, the site is highly-attended. What happens when we shift what John Urry’s calls our habituated ‘tourist gaze’ (Urry 2002) to an analogous aural approach? It could be that what we see and what we (expect to) hear don’t match, but that our perception of sound is overridden by the gaze. This work thus sets out to question the relationship between vision, sound and situated experience, and in so doing, addresses the Zen koan that forms the titles of the work: ‘what is the Sublime-sound-of-the-one-hand?’
The work was realised by making and hour-long stereo omnidirectional recording of Ryoan-ji. The recording was presented on a loop in an art gallery context, It Sounds Like Art, curated by Lanfranco Aceti, Kasa Gallery, Istanbul (2-26 April 2014). The stereo recording was juxtaposed with a large fixed image photo I took of Ryoan-ji, uninhabited by people save a mobile phone held by a hand protruding into the pristine scene. An excerpt of the recording with an accompanying commentary have also been published in an anthropology blog, FocaalBlog, 3 August, 2015.
On experiencing Ryōan-ji from a soundscape perspective, my experience was one of crowding and being crowded (i.e. ochlophonic) through the multiple vocal utterances, many of which could be heard counting the garden’s stones. Since 2004 cameras produced and sold in Japan must produce a shutter sound of 65 decibels or louder. Hence the recording is peppered with shutter sound. There is a tendency for many Western scholars to discuss and analyse Japanese cultural practices, such as tea-drinking and Zen gardens, as a specific and quantifiable set of discrete practices that are ossified and frozen in a bygone era (i.e. Weiss 2013). By and through listening, we instead attend to the present as it unfolds and fluctuates
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Square Dancing with the Stars to Enhance Dynamic Hirschman Linkages?
No full textIn this Presidential Address, the author takes the reader on a reconnaissance of his life and time as a regional scientist. He points out scenery he found scintillating along the way, hoping that some may pick up the banner and chew on a few of the ideas for a while. He suggests a revisit to Albert O. Hirschman’s notion of key sectors and more empirical analysis related to Marcus Berliant’s and Masahisa Fujita’s notion of knowledge creation and transfer.Presidential Address, San Antonio, Texas, March 29, 2014 (53rd Meetings of the Southern Regional Science Association
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Letter from unknown writer to Jesse L. Boyce
No full textLetter to Jesse L. Boyce from unknown author (possibly Jack) about the investigation into the powder magazine located in the Grand Canyon. Some personal news is included in the letter such as the writer's marriage to the daughter of C.A. Taylor, former Supervisor of Cochise County
Quantum Laplacians on generalized operators on Boson Fock Space
No full textBy adapting the white noise theory, the quantum analogues of the (classical)
Gross Laplacian and L´evy Laplacian, so called the quantum Gross Laplacian and
quantum L´evy Laplacian, respectively, are introduced as the Laplacians acting
on the spaces of generalized operators. Then the integral representations of the
quantum Laplacians in terms of quantum white noise derivatives are studied. Correspondences
of the classical Laplacians and quantum Laplacians are studied. The
solutions of heat equations associated with the quantum Laplacians are obtained
from a normal-ordered white noise differential equation
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
The Exotic (Higher Order L\'evy) Laplacians generate the Markov processes given by distribution derivatives of white noise
No full textUji Efektifitas Nematoda Entomopatogen Steinernema spp. Sebagai Pengendali Penggerek Pucuk Kelapa Sawit (Oryctes rhinoceros L.) (Coleoptera : Scarabaidae) di Laboratorium
No full textSelly Khairunnisa, “Efficacy Test of Entomopathogenic Nematodes
Steinernema spp. as a Controller of Coconut Palm Rhinoceros Beetle
Oryctes rhinoceros L.) (Coleoptera : Scarabaidae) in the Laboratory”, under
supervised by Mukhtar Iskandar Pinem dan Fatimah Zahara. This research was
conducted to determine the effectiveness of entomopathogenic nematodes
Steinernema spp. as a controller of O. rhinoceros L. (Coleoptera : Scarabidae)
in the Laboratory. This research was carried out in the Laboratory of Pests and
Plant Diseases, Agroecotechnology, Faculty of Agriculture, University of North
Sumatra from January to March 2013. The method of this research was
Completely Randomized Design (CRD) non-Factorial which consist of 6
treatments and 3 replications. Treatments being tested were 6 levels of population
density Infective Juvenile (JI) of nematodes Steinernema spp. (0, 50, 100, 150,
200, 250 JI/ml).
The results of this research showed that with population density of
Steinernema spp. 200 JI/ml and 250 JI/ml at 144 hours after the application is
effective for controlling larva mortality O. rhinoceros L. for 85.71% and 100%.
The fastest ’s larval mortality time was found with population density of
Steinernema spp 250 JI/ml at 56 hours after the application.66 HalamanSkripsi Sarjan
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