Artigos de revistas sobre o tema "Electric-acoustic compositions"

Abstract We present the second iteration of a Touch-Responsive Augmented Violin Interface System, called TRAVIS II, and two compositions that demonstrate its expressivity. TRAVIS II is an augmented acoustic violin with touch sensors integrated into its 3-D printed fingerboard that track left-hand finger gestures in real time. The fingerboard has four strips of conductive PLA filament that produce an electric signal when fingers press down on each string. Although these sensors are physically robust, they are mechanically assembled and thus easy to replace if damaged. The performer can also trigger presets via four sensors attached to the body of the violin. The instrument is completely wireless, giving the performer the freedom to move throughout the performance space. Although the sensing fingerboard is installed in place of the traditional fingerboard, all other electronics can be removed from the augmented instrument, maintaining the aesthetics of a traditional violin. Our design allows violinists to naturally create music for interactive performance and improvisation without requiring new instrumental techniques. The first author composed two compositions to highlight TRAVIS II: “Dream State” and “Kindred Dichotomy.” Both of these compositions involve improvisation in their creative process and include interactive visuals. In this article we describe the design of the instrument, experiments leading to the sensing fingerboard, performative applications of the instrument, and compositional considerations for the resultant pieces.

Preliminary studies have shown that the optical absorption spectra of radiation-colored glasses correspond to the spectral behavior of the scattering losses of an optically inhomogeneous medium. The reasons for the same optical changes in glasses of different compositions are the radiation-induced electric charge separation in the structurally nano-inhomogeneous glass volume, polarization and formation of nanometer optical inhomogeneities. The authors of this work prove that the radiation changes in the mechanical and optical properties of silicate glasses are of the same nature. The performed estimates indicate that the electric charge separation in the glasses occurs up to absorbed doses of about 1 MGy. The local electric charge separation due to the appearance of Coulomb forces leads to radiation hardening of the glasses. The estimated Coulomb hardening of the quartz glasses was ~ 107 Pa. The theoretical results were experimentally confirmed by measuring the mechanical properties of the glasses under high intensity proton irradiation as well as by testing the mechanical strength of a composite material based on quartz glass. Under proton irradiation with a dose rate of 5×103 Gy/s (energy of 8 MeV) up to threshold doses of ~ (1 – 5) ×106 Gy in the KU-1 quartz glasses, the decrement of acoustic vibrations decreased due to Coulomb hardening. After gamma irradiation with 1.34×105 Gy, the tensile strength of the composite material based on quartz glass increased by up to 20 MPa. This value is in the range of estimates of Coulomb hardening of quartz glasses. It is also shown that ionizing radiation does not affect the elastic modulus of materials based on SiO2.

Using the Sagdeev pseudopotential method, the properties of negative dust-acoustic supersolitons are investigated in a plasma comprising cold negative dust and Boltzmann and Cairns non-thermal positive ions. Supersolitons have electric field profiles with additional wiggles on traditional bipolar structures, and their existence requires pseudopotentials having two sub-wells before a root is reached. Once the existence ranges are determined in parameter space, typical pseudopotential, supersoliton and electric field profiles can be easily generated. Their characteristics are very robust and yield dust and dust-ion-acoustic supersolitons in a wide range of compositional models and parameter ranges.

The problem of sound emission is considered by a system formed from cylindrical piezoceramic radiators with internal acoustically soft screens. Longitudinal axis of emitters lie in one plane. This system is characterized by the interaction of electric, mechanical and acoustic fields in the process of conversion electrical energy to acoustical energy and acoustic fields in the process of forming them in the environments. The purpose of the work is to determine the peculiarities of the electromechanical acoustic transformation of energy by cylindrical piezoceramic radiators with internal screens in the composition of flat systems, taking into account all types of interaction.The research was carried out by the method of bound fields in multiply connected domains with the use of addition theorems for the cylindrical wave functions. The physical fields arising from the emission of sound by such a system are determined by the joint solution of the system of differential equations: the wave equation; equations of motion of thin piezoceramic shells with circular polarization in displacements; the equations of forced electrostatics for piezoceramics at given boundary conditions, the conditions of conjugation of fields at the boundaries of the division of domains and electric conditions.The solution of the problem is reduced to the solution of an infinite system of linear algebraic equations with respect to unknown coefficients of field expansions.An analysis of the results of numerical calculations, performed on the basis of the obtained analytical relations, called to establish a number of features in the electromechanical acoustic transformation of energy by emitters in the composition of flat systems. They include: the role of acoustic interaction in the process of energy conversion; determination of the mechanism of quantitative assessment of the influence of interaction on these processes; the dependence of the degree of violation of the radial symmetry of the acoustic loading of the emitters on the amount of acoustic interaction; the appearance of multimodality of the mechanical field of emitters in the structure of the plane system and the dependence of the redistribution of energy between all modes on the degree of disturbance of the radial symmetry of the acoustic loading of the emitters.

My introduction to the emerging field of disability studies (DS) was not by accident, but by injury. A professor of music composition and theory who uses piano and computer keyboards extensively, performs on acoustic guitar, electric bass, and mandolin, and handwrites a great deal, I have coped with pain and functional limitations from spinal and upper limb injuries for years. In 1999, on disability leave, recovering from neurosurgery for cervical disk herniation, I read a call for papers on disability and the performing arts. Intrigued, I immersed myself in DS literature, and began to participate in the Society for Disability Studies and to engage in research, teaching, and creative projects on disability topics.

The magnetoresistivity (MR) is theoretically calculated in a compositional semiconductor superlattice (CSSL), subjected to a crossed DC electric field and magnetic field, in the presence of an intense electromagnetic wave (EMW). The magnetic field is oriented along the growth direction of the CSSL and the electron–acoustic phonon interaction is taken into account at low temperature. Numerical results for the GaN/AlGaN CSSL show the Shubnikov–de Haas (SdH) oscillations in the MR whose period does not depend on the temperature and amplitude decreases with increasing temperature. The temperature dependence of the relative amplitude of these oscillations is in good agreement with other theories and experiments in some two-dimensional (2D) electron systems. The influence of the EMW as well as superlattice structure on the MR is discussed and compared with available theoretical and experimental results.

Electromagnetic modes with the electric vector of the wave lying in the plane defined by the wave vector and the external d.c. electric field are studied theoretically in weakly ionized plasmas with several sorts of ions. The corresponding instability criteria are also given. The analysis is based on kinetic equations with BGK model collision integrais for the one-particle distribution functions of the charged constituents (electrons and all sorts of ions). The linear theory of perturbation is applied. Special attention is given to the long-wave domain (modal wavelengths much larger than the electron mean free path): it is in this domain that the instabilities are found to set in first as the electron drift is gradually increased. The increments of these instabilities are, however, smaller than in the short-wave domain which was mainly studied before. Apart from the modes which exist in weakly ionized plasmas with only one ion species, and which re-appear in the case studied here with somewhat altered characteristics, a new slow mode, specifie for multi-species weakly ionized plasmas, is found. Its phase velocity is below the electron thermal velocity, and its existence, as well as the conditions of excitation of the corresponding instability, depend on the plasma composition and non-isothermality (viz. the ratio Te/Ti). In some situations, two such modes are possible. The analysis of the instabilities is completed by a brief description of two (sometimes three) branches of ion acoustic instability, specific for the multi-species plasmas and propagating strictly along the direction of the external electric field.

Abstract. The optical detection of auroral subarcs a few tens of m wide as well as the direct observation of shears several m/s per m over km to sub km scales by rocket instrumentation both indicate that violent and highly localized electrodynamics can occur at times in the auroral ionosphere over scales 100 m or less in width. These observations as well as the detection of unstable ion-acoustic waves observed by incoherent radars along the geomagnetic field lines has motivated us to develop a detailed time-dependent two-dimensional model of short-scale auroral electrodynamics that uses current continuity, Ohm's law, and 8-moment transport equations for the ions and electrons in the presence of large ambient electric fields to describe wide auroral arcs with sharp edges in response to sharp cut-offs in precipitation (even though it may be possible to describe thin arcs and ultra-thin arcs with our model, we have left such a study for future work). We present the essential elements of this new model and illustrate the model's usefulness with a sample run for which the ambient electric field is 100 mV/m away from the arc and for which electron precipitation cuts off over a region 100 m wide. The sample run demonstrates that parallel current densities of the order of several hundred µA m-2 can be triggered in these circumstances, together with shears several m/s per m in magnitude and parallel electric fields of the order of 0.1 mV/m around 130 km altitude. It also illustrates that the local ionospheric properties like densities, temperature and composition can strongly be affected by the violent localized electrodynamics and vice-versa.Key words: Ionosphere (auroral ionosphere, electric fields and currents, ionosphere-magnetosphere interactions)

The authors of the Test Loop of the JSC “VNIIZhT” had conducted tests of mainline electric locomotives intended for handling freight trains on sections of the road electrified with alternating current at a voltage of 25 kV (electric locomotives of an alternating current). Tests were conducted in terms of the level of external noise at the standing time. The results of tests of AC electric locomotive, which was in a stationary mode, are presented in terms of the external noise index, and a methodology for performing these tests is described. As a result of the conducted researches, the article establish the main sources of external noise in the operation of AC electric locomotives (fans intended for cooling electrical equipment and traction motors, air compressors, traction transformers, etc.), its actual values, as well as the nature of the sound field around electric locomotives. The analysis of the obtained sound field made it possible to identify the points where the excess of the standard noise values (more than 65 dBA) is observed. It is proposed to bring the technical condition of the equipment, such as traction transformer, converter and cooling module of the traction engine of the power compartment of an electric locomotive in accordance with the normative documentation. The repeated measurements of the external noise level after technical completion did not reveal the excess of its normative values in accordance with the regulatory documentation. In order to provide a normative margin in terms of the external noise of an electric locomotive, it is proposed to use sound-absorbing material in the construction of its body. It is recommended to perform an experimental study of the spectral composition of the noise of the equipment of an electric locomotive operating at the standing time and the resulting external noise at points located outside and around the locomotive in order to calculate the acoustic characteristics of sound-absorbing materials. Sound absorbing material is expedient to be selected depending on the frequency range in which the greatest excess is observed above the maximum permissible values using known empirical and semi-empirical dependences, on the basis of which it is possible to preliminary determine its sound-absorbing properties in the frequency range established by regulatory documents. After equipping the power compartment of the locomotive with soundproof materials, tests on the evaluation of the external noise of an electric locomotive at standing should be repeated.

Background. Today, jazz transcriptions of works by George Gershwin can be heard around the world. Works such as “The Man I Love”, “I Got Rhythm”, “Summertime”, “Liza”, “Fascinating Rhythm”, “Somebody Loves Me”, “Swanee”, included in the collection “Gershwin songs”, and also “Seven virtuoso etudes on the themes of G. Gershwin” by E. Wilde are performed by modern academic musicians. Thus, widely known performance versions of piano transcriptions “Gershwin songs” by M.-A. Hamelin, the song “The Man I Love” performed by A. Tharaud, P. Barton, and others famous performers. The evidence of growing interest of classical performers in the music of the American composer is the successful holding of the IV G. Gershvin International Music Competition in New York (on November 7–10, 2019). Director and main organizer of the competition, Michael Bulychev-Okser, is the American pianist, the main winner of many international competitions in the United States, Italy, Andorra, Spain and Mexico. How does a musician of academic direction, whose inner professional intentions and way of thinking are brought up on the classical repertoire, perceive Gershwin’s jazz compositions? What is the specificity of modern reading of his music? In which cultural traditions should we look for the key to understanding Gershwin’s musical language, its rhythmic and intonational specifics? Finally, can a jazz pianist consider himself completely free from the culture of the academic tradition by playing Gershwin? The search for answers to all these questions has identified the problematic perspective of this article. The purpose of the article is to reveal the characteristic features of the performance of G. Gershwin’s transcriptions by modern academic pianists using specific examples and to determine the interpretational tasks of the performer. The research methodology is based on a comprehensive genre andstyle approach to the study of musical material, and also includes a comparative method used for concidering different performance versions of the same work. The main results of the study. Jazz and the culture of academic music work closely together in the style of G. Gershwin. Indicative in this sense was the idea of a concert eloquently called “Reunion of Classics and Jazz” (1924), for which the “Rhapsody in Blue” was created and where it was first performed by the author with the orchestra of Paul Whiteman. G. Gershwin, more than any other composer of his time, communicated with African-American musicians: he knew Will Voderi, Lucky Roberts, Duke Ellington; heard New York pianists play downtown and often visited the “Cotton Club” and other places in Harlem to hear the bands of Duke Ellington, Cab Calloway and other jazz musicians. But not only jazz was the area of interest and creative acquaintances of Gershwin. Along with jazz culture, there were many other musical styles. In the works of G. Gershwin, Ch. Ives, A. Copland in the early 1920s – mid 1940s there is an original combination of deep folk intonation with the composer’s technique of the XX century, up to the use of dodecaphonic-serial technique (Copland). The fusion of jazz and academic branches in Gershwin’s music, above all, takes place at the level of form. “I took the blues and put it in a larger and more serious form”, said the composer (as quoted by Schneider, 1999: 67). As a pianist, Gershwin did not receive a systematic professional education as a child, although he later had enough teachers. But that didn’t stop him from becoming a real pianist-virtuoso and a brilliant improviser. One should listen to archival recordings of Gershwin’s performance to get an idea of his performance style. Samples of his piano performances have been partially preserved: some acoustic and electric recordings, radio recordings, two sound films and a large number of piano videos (Gibbons, 2002). The studio recording of “Rhapsody in Blue” demonstrates Gershwin’s completely “academic” pianism – with clear, well-founded articulation, bright sonic fullness, thoughtful agogics of expressive declamation, which is only emphasized by the well-organized metric pulsation and dynamics by active rhythmic movement – and his true virtuoso skill. Should a modern pianist, performing Gershwin’s works, follow the example of a balanced and rather “academic” performance, as in his studio recording “Rhapsody in Blue”, or follow Gershvin’s interpretation, which can be observed in the transcription “I Got Rhythm”, where he clearly prefers the jazz element? It makes sense to compare different examples of Gershwin’s popular piano transcription of “The Man I Love”. The performance version of the English pianist Paul Barton is an attempt to imitate the specifics of the freedom of sound of instrumental jazz styles, however, as one can hear, the musical intonation is not always convincing, the breath is a bit torn, the agogics of chord melodic constructions performance the agogics of chord melodic constructions (upper layers of texture) is greatly exaggerated and the performing is practically “released” from calculation and feeling of time. As an undoubted plus of this version it is necessary to note huge attention to harmony as such, to vertical and balance within a chord – Barton’s harmony “breathes” and moves. This approach can be justified, because the harmony of Gershwin’s songs is always diverse, bright and inventive. The record of Gershwin’s 1959 “Songbook” by Ella Fitzgerald is available today. The composition “The Man I Love” in her performance can be one of the possible orienting points in the intonation of the main melodic voice, the calculation of its unfolding in time, the display of interval “tensions” and melodic intentions in Gershwin’s music. E. Fitzgerald’s vocal-jazz style presupposes a different temporal organization of the melody, different from the one suggested by P. Barton – the movement of its vocal recitation-intonation and improvisational vocals is accelerated, then somewhat slowed down, thus creating “compensated time” of a musical work, and it is with soft, relaxed, naturally light breathing. The modern media space presents the album of French pianist Alexandre Tharaud “Swing in Paris”, which includes two compositions by Gershwin: “The Man I Love” and “Do it Again!”. Three different interpretations of “The Man I Love” are popular on the You Tube website, where each video is original in its own way. These performings are variants, but the concept of details – melodic constructions, organization of rhythmic accents, as well as a sense of Gershwin’s style, is preserved. The sophistication of the Parisian salon is what distinguishes the game of Tharaud. The musician has a sense of proportion and uses the full range of expressive means of academic pianism. At the same time, the development of the melodic line takes place organically and effortlessly, alluding to vocal genre examples, to free breathing and “blues” articulation of jazz vocalists; rhythmic accentuation is unobtrusive but clearly felt. Summing up, we note that the “Tharaud approach” is certainly the closest to the reference. Conclusions. Proceeding from the synthetic nature of G. Gershwin’s music, comprehension of its stylistic and cultural origins, analysis of listened musical samples, let us single out the interpretation constants that must be taken into account by the performer of his compositions. Among them – the inheritance of agogics, articulation, “light” breathing, inherent in the vocal jazz manner, in the intonation of the melody; “Breathing” harmony with a colorful timbre filling of chords and subvoices united into a movable vertical-horizontal complex; understanding of rhythm as an independent expressive sphere that has ethnic roots in the music of the African American tradition.

This paper presents a numerical study of failure behavior of cementitious composite materials differing in their composition (aggregate size). A set of four different materials was tested in atypical splitting test geometry. During these tests, apart from the typical outputs such as the load–displacement curves, signals from failure events causing acoustic emission (AE) were recorded. However, reliability of the procedures of the failure events localization might seem questionable in some cases – therefore, the test evaluation procedures were accompanied by analyses using 3D numerical simulation tools based on nonlinear fracture-mechanics approach and propagation of fracture events in the specimens are performed using two computational codes. One is a commercial non-linear FEM code with implementation of cohesive crack model (in the smeared cracks formulation). The second one is an own developed discrete lattice-type model. The comparison of AE records from the tests with the results of the performed numerical simulations can answer questions on the distribution and magnitude (and possibly the energy dissipation amount) of the recorded failure events and generally help in the interpretation and exploitation of AE in the research of failure of non-electric building materials.

The concept of active microchannel for precise manipulation of particles in biomedicine is reported in this paper. A novel vibration-assisted thermal imprint method is proposed for effective formation of a microchannel network in the nanocomposite piezo polymer layer. In this method, bulk acoustic waves of different wavelengths excited in an imprinted microstructure enable it to function in trapping–patterning, valve, or free particle passing modes. Acoustic waves are excited using a special pattern of electrodes formed on its top surface and a single electric ground electrode formed on the bottom surface. To develop the microchannel, we first started with lead zirconate titanate (PZT) nanopowder [Pb (Zrx, Ti1–x) O3] synthesis. The PZT was further mixed with three different binding materials—polyvinyl butyral (PVB), poly(methyl methacrylate) (PMMA), and polystyrene (PS)—in benzyl alcohol to prepare a screen-printing paste. Then, using conventional screen printing techniques, three types of PZT coatings on copper foil substrates were obtained. To improve the voltage characteristics, the coatings were polarized. Their structural and chemical composition was analyzed using scanning electron microscope (SEM), while the mechanical and electrical characteristics were determined using the COMSOL Multiphysics model with experimentally obtained parameters of periodic response of the layered copper foil structure. The hydrophobic properties of the PZT composite were analyzed by measuring the contact angle between the distilled water drop and the three different polymer composites: PZT with PVB, PZT with PMMA, and PZT with PS. Finally, the behavior of the microchannel formed in the nanocomposite piezo polymer was simulated by applying electrical excitation signal on the pattern of electrodes and then analyzed experimentally using holographic interferometry. Wave-shaped vibration forms of the microchannel were obtained, thereby enabling particle manipulation.

The awareness about UAM is amplified by steadily growing numbers of air taxi concepts being announced. In general environmentally friendly by electric propulsion, community noise and en-route noise are still prominent open questions. Several studies for larger UAM aircraft, describing the acoustic characteristics of a variety of potential air taxi concepts, have been performed by the author. Due to the abovementioned multitude of different vehicle concepts and their multiple operational conditions, each of them shows individual sound characteristics. Therefore, further investigations of noise created by air taxi fleets appear to be crucial. Understanding of community noise around vertiports and along air taxi routes will strongly depend on those fleets. In this paper, acoustically different air taxi systems are composing different sets of air taxi fleets, used for air traffic noise simulations. The simulations start with baseline scenarios of equally represented taxi systems on fixed flight paths with several flight levels in a certain air lane. The final fleets are consisting of random air taxi composition with randomly populated flight paths. The results, based on common noise metrics and changes in the number of affected residents, could provide a first indication how to reduce community noise by future UAM traffic management.

Examples from the Polish clastic and carbonate reservoirs from the Central Polish Anticlinorium, Carpathians and Carpathian Foredeep are presented to illustrate possibilities of using well logging to geothermal resources recognition and characterization. Firstly, there was presented a short description of selected well logs and methodology of determination of petrophysical parameters useful in geothermal investigations: porosity, permeability, fracturing, mineral composition, elasticity of orogeny and mineralization of formation water from well logs. Special attention was allotted to spectral gamma-ray and temperature logs to show their usefulness to radiogenic heat calculation and heat flux modelling. Electric imaging and advanced acoustic logs provided with continuous information on natural and induced fracturing of formation and improved lithology recognition. Wireline and production logging were discussed to present the wealth of methods that could be used. A separate matter was thermal conductivity provided from the laboratory experiments or calculated from the results of the comprehensive interpretation of well logs, i.e., volume or mass of minerals composing the rocks. It was proven that, in geothermal investigations and hydrocarbon prospection, the same petrophysical parameters are considered, and well-logging acquisition equipment and advanced methods of processing and interpretation, developed and improved for almost one hundred years, can be successfully used in the detection and characterization of the potential geothermal reservoirs. It was shown that the newest (current investment)—as well as the old type (archive)—logs provide useful information.

The paper deals with urgent issues of development of resource-saving methods of biotechnological processes intensification. The main purpose of the work is to show the efficiency of using extremely low doses of physical factors impact in food biotechnology. Acoustic and electric treatment was in various modes. Impact capacity did not exceed 10-4 W/kg. The duration of exposure ranged from 5 to 15 min. Barley grains enzymes and lactic acid microorganisms were subjected to treatment. Impact of vibration as a physical factor, its frequency is considered as a priority in controlling growth and biochemical processes in biological objects. Impact frequency in the range of 50–10000 Hz influences the activity of hydrolytic enzymes in bimodal way. It is presented in the article. The coincidence of the frequency ranges of the maximum activity of enzymes in the model reactions with the ones in the grain of barley under the treatment of alternating current and sound is noted. Improvement of all indexes of germinating barley and improvement of the quality of the finished malt were observed in these ranges. Low-intensity acoustic treatment at a frequency of 2000 Hz contributed to an increase in β-galactosidase activity of the CT-95 Str. thermophilus strain. Selected ST-95 Str. thermophilus strain was used in the starter composition for the experimental sample production of fermented melted milk. The fermentation process intensification was observed. The lactose content of this product is 30% less in comparison with the feedstock. The use of traditional starter without a selected strain can reduce the lactose content by an average of 7.5%. The results of biotechnological processes modification by means of the treatment of enzymes and extremely low doses of physical factors impact used in meat technologies are observed. Thus, the prospects of using low-intensity physical effects of vibration in the development of innovative food technologies are substantiated. It is also promising to use these technologies in making absolutely new food products with different qualities.

Due to their highly hydrophilic nature and compositional versatility, hydrogels have assumed a protagonic role in the development of physiologically relevant tissues for several biomedical applications, such as in vivo tissue replacement or regeneration and in vitro disease modeling. By forming interconnected polymeric networks, hydrogels can be loaded with therapeutic agents, small molecules, or cells to deliver them locally to specific tissues or act as scaffolds for hosting cellular development. Hydrogels derived from decellularized extracellular matrices (dECMs), in particular, have gained significant attention in the fields of tissue engineering and regenerative medicine due to their inherently high biomimetic capabilities and endowment of a wide variety of bioactive cues capable of directing cellular behavior. However, these hydrogels often exhibit poor mechanical stability, and their biological properties alone are not enough to direct the development of tissue constructs with functional phenotypes. This review highlights the different ways in which external stimuli (e.g., light, thermal, mechanical, electric, magnetic, and acoustic) have been employed to improve the performance of dECM-based hydrogels for tissue engineering and regenerative medicine applications. Specifically, we outline how these stimuli have been implemented to improve their mechanical stability, tune their microarchitectural characteristics, facilitate tissue morphogenesis and enable precise control of drug release profiles. The strategic coupling of the bioactive features of dECM-based hydrogels with these stimulation schemes grants considerable advances in the development of functional hydrogels for a wide variety of applications within these fields.

The interior sound quality (SQ) of pure electric vehicles (PEVs) has become an important consideration for users purchasing vehicles. At present, it is insufficient to take the sound pressure level as the interior acoustics design index of PEVs. Transfer path analysis (TPA) and transfer path synthesis (TPS) that take the SQ of interior noise as the improvement target remains in the preliminary exploration stage. In this paper, objective psychoacoustic parameters of SQ were taken as evaluation indexes of interior PEV noise. A virtual interior SQ synthesis model was designed on the basis of TPA and TPS, which combines experimentation and simulation. The SQ synthesis model demonstrates each noise component contribution in a PEV by new SQ separation technology. First, the interior noise transfer path and noise source of the PEV were determined in a synthesis analysis method of the interior PEV noise. Second, on the basis of the composition mechanism of interior noise and the basic principle of TPA, the excitation signal and transfer function of each interior noise path in the PEV were tested. On the basis of TPS, the interior SQ synthesis model of PEV was then established. Finally, the accuracy of the prediction model was verified in simulation and experimental comparison studies on the psychoacoustic objective parameters of SQ. The SQ objective parameter value of each transfer path was quantified by using contribution analysis. The results are expected to improve the comfort of the interior acoustic environment and enhance the competitiveness of vehicle products. They also provide an effective reference and new ideas for the development of interior SQ in PEVs.

The article presents the results of studying the geological structure of the Bazhenov Formation in the Nadym-Ob interfluve of Western Siberia with the aim of predicting the oil content of this black shale stratum. As a result of interpretation of a wide range of well logging represented by electric, radioactive and acoustic logging, with subsequent matching of these results with paleontological definitions of micro- and macrofauna, the distribution of the Salym, Nizhnevartovsky and Tarkosalinsky types of sections of the Bazhenov Formation was clarified, transitional areas between them were identified. It has been established that the Tarkosalinsky type is more widespread in the western direction than was shown earlier and is also distinguished in the Vengayakhinskaya, Yaraynerskaya and other areas. The Nizhnevartovsky type, on the contrary, has a narrower distribution and stands out directly within the same name arc and to the south by the Variegasky-Tagrinsky megahigh. On the basis of geological, geochemical, geophysical criteria and the results of an inflow test in deep wells, a map of the oil potential prospects of the “classical” sections of the Bazhenov Formation has been compiled. Regional prerequisites (high catagenesis of organic matter, significant modern concentrations of organic carbon, etc.) for the discovery of industrial accumulations of oil in the Bazhenov Formation in the southern regions of the Yamalo-Nenets Autonomous Area are identified. The results of the test for the inflow of the Bazhenov Formation in this area in the 70–90s XX century were analyzed; repeated, interval testing of these deposits using modern methods of stimulation of the inflow is recommended. The necessity of laboratory lithological, petrophysical, geochemical study of the core of the Bazhenov Formation in the southern part of the Yamalo-Nenets Autonomous Area is substantiated with the aim of determining its lithological composition, identifying oil source and oil productive intervals, studying the reservoir structure and the nature of saturation of its void space, developing recommendations for calculating oil reserves and creating technology for its cost-effective production.

Acoustic solitons obtained through a reductive perturbation scheme are normally governed by a Korteweg–de Vries (KdV) equation. In multispecies plasmas at critical compositions the coefficient of the quadratic nonlinearity vanishes. Extending the analytic treatment then leads to a modified KdV (mKdV) equation, which is characterized by a cubic nonlinearity and is even in the electrostatic potential. The mKdV equation admits solitons having opposite electrostatic polarities, in contrast to KdV solitons which can only be of one polarity at a time. A Hirota formalism has been used to derive the two-soliton solution. That solution covers not only the interaction of same-polarity solitons but also the collision of compressive and rarefactive solitons. For the visualization of the solutions, the focus is on the details of the interaction region. A novel and detailed discussion is included of typical electric field signatures that are often observed in ionospheric and magnetospheric plasmas. It is argued that these signatures can be attributed to solitons and their interactions. As such, they have received little attention.

Many of today's ships are equipped with electric propulsion systems, which leads to the relevance of the article. The general trend is the use of electric propulsion systems AC, due to a more robust design of an asynchronous motor and slightly better weight and dimensions. The use of asynchronous motor requires a static frequency converter for speed control and soft start. In the currently used PWM converters different types. Opportunities classical direct frequency converters are limited due to a number of fundamental shortcomings, particularly the lack of quality of the output voltage and the presence of the gap current during switching. Offered in Article electric propulsion system with direct frequency converter allows for a natural mode switching valves, as well as significantly improve the harmonic composition of output voltage and current of the inverter. The absence of a carrier frequency pulse-width modulation improves acoustics and electromagnetic compatibility with the ship's equipment. Mode powered by two independent generators improves vibro-acoustic characteristics.

The confluence of composition and performance is a compelling phenomenon which confronts many 21st century electronic music artists, brought about primarily through an independent “DiY” ethos to creativity and the ubiquity of advanced musical, and non-musical, technology. Techniques of software programming, improvisation, reconstitution of electric and acoustic instruments, sampling, and manipulation of audio in a live setting (to name a few) may all find a place in an artist’s methodology regardless of style. It may be even be said that the techniques employed by an artist delineate the style itself, e.g. “controllerism,” “turntablism,” “live PA,” etc. The following paper offers an in-depth structural analysis of the composition and performance fundamentals of BlipVert, a pseudonym under which I have been presenting electronic music to the general public for almost two decades. The BlipVert composition “New Choomish,” from BlipVert’s 2010 release “Quantumbuster Now” (Eat Concrete Records, NL), is examined as a construct which manifests an expressive faculty in both live and studio environments, consequently demonstrating a profoundly synthesized framework of sonic and gestural principles. Keywords: composition, performance, improvisation, movement, building-blocks, Northlich, BlipVert, New Choomish

Introduction Generative algorithms have been used for many years by computer musicians like Iannis Xenakis (Xenakis) and David Cope (Cope) to make complex electronic music composition. Advances in computer technology have made it possible to design music algorithms based upon specific pitch, timbre and rhythmic qualities that can be manipulated in real time with a simple interface that a child can control.jam2jam (Brown, Sorensen, & Dillon) is a shareware program developed in java that uses these ideas and involves what we have called Networked Improvisation, which ‘can be broadly described as collaborative music making over a computer network’ (Dillon & Brown). Fig. 1: jam2jam interface (download a shareware version at http://www.explodingart.com/.) Jamming Online With this software users manipulate sliders and dials to influence changes in music in real time. This enables the opportunity for participants to interact with the sound possibilities of a chosen musical style as a focused musical environment. Essentially by moving a slider or dial the user can change the intensity of the musical activity across musical elements such as rhythm, harmony, timbre and volume and the changes they make will respond within the framework of the musical style parameters, updating and recomposing within the timeframe of a quaver/eighth note. This enables the users to play within the style and to hear and influence the shape and structure of the sound. Whilst real time performance using a computer is not new, what is different about this software is that through a network users can create virtual ensembles, which are simultaneously collaborative and interactive. jam2jam was developed using philosophical design principals based on an understanding of ‘meaning’ gained by musicians drawn from both software, live music experiences (Dillon, Student as Maker) and research about how professional composers engage with technology in creative production (Brown, Music Composition). New music technologies have for centuries provided expressive possibilities and an environment where humans can be playful. With jam2jam users can play with complex or simple musical ideas, interact with the musical elements, and hear the changes immediately. When networked they can have these musical experiences collaboratively in a virtual ensemble. Background The initial development of jam2jam began with a survey of the musical tastes of a group of children between the ages of 8-14 in a multi racial community in Delaware, Ohio in the USA as part of the Delaware Children’s Music Festival in 2002. These surveys of ‘the music they liked’ resulted in the researchers purchasing Compact Discs and completing a rule based analysis of the styles. This analysis was then converted into numerical values and algorithms were constructed and used as a structure for the software. The algorithms propose the intensity of range of each style. For example, in the Grunge style the snare drum at low intensity plays a cross stick rim timbre on the second and fourth beat and at high intensity the sound becomes a gated snare sound and plays rhythmic quaver/eighth note triplets. In between these are characteristic rhythmic materials that are less complex than the extreme (triplets). This procedure is replicated across five instruments; drums, percussion, bass, guitar and keyboard. The melodic instruments have algorithms for pitch organisation within the possibilities of the style. These algorithms are the recipes or lesson plans for interactive music making where the student’s gestures control the intensity of the music as it composes in real time. A simple interface was designed (see fig. 1) with a page for each instrument and the mixer. The interface primarily uses dials and sliders for interaction, with radio buttons for timbrel/instrument selection. Once the software was built and installed students were observed using it by videotaping their interaction and interviewing both children and teachers. Observations, which fed into the developmental design, were drawn on a daily basis with the interface and sound engine being regularly updated to accommodate students and teacher requirements. The principals of observation and analysis were based upon a theory of meaningful engagement (Brown, “Modes”, Music Composition; Dillon, “Modelling”, Student as Maker). These adjustments were applied to the software, the curriculum design and to the facilitators’ organisational processes and interactions with the students. The concept of meaningful engagement, which has been applied to this software development process, has provided an effective tool for identifying the location of meaning and describing modes of creative engagement experienced through networked jamming. It also provided a framework for dynamic evaluation and feedback which influences the design with each successive iteration. Defining a Contemporary Musicianship Networked improvisational experiences develop a contemporary musicianship, in which the computer is embraced as an instrument that can be used skillfully in live performance with both acoustic/electric instruments and other network users. The network itself becomes a site for a virtual ensemble where users can experience interaction between ‘players’ in real time. With networked improvisation, cyberspace becomes a venue. Observations have also included performances between two distant locations and ones where computers on the network simultaneously ‘jammed’ with ‘live’ acoustic performers. The Future The future of networked jamming is exciting. There is potential for these environments to replicate complex musical systems and engage participants in musical understandings, linking gesture and sound with concepts of musical knowledge that are constructed within the algorithm and the interface. The dynamic development of Networked Jamming applications involve designs which apply philosophical and pedagogical principles that encourage and sustain meaningful engagement with music making. These are sufficiently complex to allow the revisiting of musical experiences and knowledge at increasingly deeper levels. Conclusion jam2jam is a proof of concept model for networked jamming environments, where people and machines play music in collaborative ensembles. Network jamming requires a contemporary musicianship, which embraces the computer as an instrument, the network as an ensemble and cyberspace as venue for performance. These concepts facilitate access to the ensemble performance of complex musical structures through simple interfaces. It provides the opportunity for users to be creatively immersed in the simultaneous act of listening and performance. jam2jam represents an opportunity for music-makers to have interactive experiences with musical knowledge in a way not otherwise previously available. It enables children, adults and the disabled to enter into a collaborative community where technology mediates a live ensemble performance. The experience could be an ostinato pumping out hip-hop or techno grooves, a Xenakis chaos algorithm, or a minimal ambient soundscape. With the development of new algorithms, a sample engine and creative interface design we believe this concept has amazing possibilities. The real potential of this concept lies in the access that the users have to meaningful engagement with ensemble performance in the production of music, in real time, even with limited previous experience or dexterity. References Brown, A. “Modes of Compositional Engagement.” Paper presented at the Australasian Computer Music Conference-Interfaces, Brisbane, Australia. 2000. ———. Music Composition and the Computer: An Examination of the Work Practices of Five Experienced Composers. Unpublished PhD, University of Queensland, Brisbane, 2003. ———, A. Sorensen, and S. Dillon. jam2jam (Version 1) Interactive generative music making software. Brisbane: Exploding Art Music Productions, 2002. Cope, D. “Computer Modelling of Musical Intelligence in EMI.” Computer Music Journal 16.2 (1992): 69-83. Dillon, S. “Modelling: Meaning through Software Design.” Paper presented at the 26th Annual Conference of the Australian Association for Research in Music Education, Southern Cross University Tweed Heads, 2004. ———, and A. Brown. “Networked Improvisational Musical Environments: Learning through Online Collaborative Music Making.” In Embedding Music Technology in the Secondary School. Eds. J. Finney & P. Burnard. Cambridge: Continuum Press, In Press. Dillon, S. C. The Student as Maker: An Examination of the Meaning of Music to Students in a School and the Ways in Which We Give Access to Meaningful Music Education. Unpublished PhD, La Trobe, Melbourne, 2001. Xenakis, I. Formalized Music. New York: Pendragon Press, 1991. Citation reference for this article MLA Style Dillon, Steve. "Jam2jam: Networked Jamming." M/C Journal 9.6 (2006). echo date('d M. Y'); ?> <http://journal.media-culture.org.au/0612/04-dillon.php>. APA Style Dillon, S. (Dec. 2006) "Jam2jam: Networked Jamming," M/C Journal, 9(6). Retrieved echo date('d M. Y'); ?> from <http://journal.media-culture.org.au/0612/04-dillon.php>.

Every act of art is able to reveal, balance and revive the relations between a territory and its inhabitants (François Davin, Southern Forest Sculpture Walk Catalogue)Introducing the Understory Art in Nature TrailIn February 2015, a colossal wildfire destroyed 98,300 hectares of farm and bushland surrounding the town of Northcliffe, located 365 km south of Perth, Western Australia (WA). As the largest fire in the recorded history of the southwest region (Southern Forest Arts, After the Burn 8), the disaster attracted national attention however the extraordinary contribution of local knowledge in saving a town considered by authorities to be “undefendable” (Kennedy) is yet to be widely appreciated. In accounting for a creative scene that survived the conflagration, this case study sees culture mobilised as a socioeconomic resource for conservation and the healing of community spirit.Northcliffe (population 850) sits on a coastal plain that hosts majestic old-growth forest and lush bushland. In 2006, Southern Forest Arts (SFA) dedicated a Southern Forest Sculpture Walk for creative professionals to develop artworks along a 1.2 km walk trail through pristine native forest. It was re-branded “Understory—Art in Nature” in 2009; then “Understory Art in Nature Trail” in 2015, the understory vegetation layer beneath the canopy being symbolic of Northcliffe’s deeply layered caché of memories, including “the awe, love, fear, and even the hatred that these trees have provoked among the settlers” (Davin in SFA Catalogue). In the words of the SFA Trailguide, “Every place (no matter how small) has ‘understories’—secrets, songs, dreams—that help us connect with the spirit of place.”In the view of forest arts ecologist Kumi Kato, “It is a sense of place that underlies the commitment to a place’s conservation by its community, broadly embracing those who identify with the place for various reasons, both geographical and conceptual” (149). In bioregional terms such communities form a terrain of consciousness (Berg and Dasmann 218), extending responsibility for conservation across cultures, time and space (Kato 150). A sustainable thematic of place must also include livelihood as the third party between culture and nature that establishes the relationship between them (Giblett 240). With these concepts in mind I gauge creative impact on forest as place, and, in turn, (altered) forest’s impact on people. My abstraction of physical place is inclusive of humankind moving in dialogic engagement with forest. A mapping of Understory’s creative activities sheds light on how artists express physical environments in situated creative practices, clusters, and networks. These, it is argued, constitute unique types of community operating within (and beyond) a foundational scene of inspiration and mystification that is metaphorically “rising from the ashes.” In transcending disconnectedness between humankind and landscape, Understory may be understood to both culturalise nature (as an aesthetic system), and naturalise culture (as an ecologically modelled system), to build on a trope introduced by Feld (199). Arguably when the bush is cultured in this way it attracts consumers who may otherwise disconnect from nature.The trail (henceforth Understory) broaches the histories of human relations with Northcliffe’s natural systems of place. Sub-groups of the Noongar nation have inhabited the southwest for an estimated 50,000 years and their association with the Northcliffe region extends back at least 6,000 years (SFA Catalogue; see also Crawford and Crawford). An indigenous sense of the spirit of forest is manifest in Understory sculpture, literature, and—for the purpose of this article—the compilation CD Canopy: Songs for the Southern Forests (henceforth Canopy, Figure 1).As a cultural and environmental construction of place, Canopy sustains the land with acts of seeing, listening to, and interpreting nature; of remembering indigenous people in the forest; and of recalling the hardships of the early settlers. I acknowledge SFA coordinator and Understory custodian Fiona Sinclair for authorising this investigation; Peter Hill for conservation conversations; Robyn Johnston for her Canopy CD sleeve notes; Della Rae Morrison for permissions; and David Pye for discussions. Figure 1. Canopy: Songs for the Southern Forests (CD, 2006). Cover image by Raku Pitt, 2002. Courtesy Southern Forest Arts, Northcliffe, WA.Forest Ecology, Emotion, and ActionEstablished in 1924, Northcliffe’s ill-founded Group Settlement Scheme resulted in frontier hardship and heartbreak, and deforestation of the southwest region for little economic return. An historic forest controversy (1992-2001) attracted media to Northcliffe when protesters attempting to disrupt logging chained themselves to tree trunks and suspended themselves from branches. The signing of the Western Australian Regional Forest Agreement in 1999 was followed, in 2001, by deregulation of the dairy industry and a sharp decline in area population.Moved by the gravity of this situation, Fiona Sinclair won her pitch to the Manjimup Council for a sound alternative industry for Northcliffe with projections of jobs: a forest where artists could work collectively and sustainably to reveal the beauty of natural dimensions. A 12-acre pocket of allocated Crown Land adjacent to the town was leased as an A-Class Reserve vested for Education and Recreation, for which SFA secured unified community ownership and grants. Conservation protocols stipulated that no biomass could be removed from the forest and that predominantly raw, natural materials were to be used (F. Sinclair and P. Hill, personal interview, 26 Sep. 2014). With forest as prescribed image (wider than the bounded chunk of earth), Sinclair invited the artists to consider the themes of spirituality, creativity, history, dichotomy, and sensory as a basis for work that was to be “fresh, intimate, and grounded in place.” Her brief encouraged artists to work with humanity and imagination to counteract residual community divisiveness and resentment. Sinclair describes this form of implicit environmentalism as an “around the back” approach that avoids lapsing into political commentary or judgement: “The trail is a love letter from those of us who live here to our visitors, to connect with grace” (F. Sinclair, telephone interview, 6 Apr. 2014). Renewing community connections to local place is essential if our lives and societies are to become more sustainable (Pedelty 128). To define Northcliffe’s new community phase, artists respected differing associations between people and forest. A structure on a karri tree by Indigenous artist Norma MacDonald presents an Aboriginal man standing tall and proud on a rock to become one with the tree and the forest: as it was for thousands of years before European settlement (MacDonald in SFA Catalogue). As Feld observes, “It is the stabilizing persistence of place as a container of experiences that contributes so powerfully to its intrinsic memorability” (201).Adhering to the philosophy that nature should not be used or abused for the sake of art, the works resonate with the biorhythms of the forest, e.g. functional seats and shelters and a cascading retainer that directs rainwater back to the resident fauna. Some sculptures function as receivers for picking up wavelengths of ancient forest. Forest Folk lurk around the understory, while mysterious stone art represents a life-shaping force of planet history. To represent the reality of bushfire, Natalie Williamson’s sculpture wraps itself around a burnt-out stump. The work plays with scale as small native sundew flowers are enlarged and a subtle beauty, easily overlooked, becomes apparent (Figure 2). The sculptor hopes that “spiders will spin their webs about it, incorporating it into the landscape” (SFA Catalogue).Figure 2. Sundew. Sculpture by Natalie Williamson, 2006. Understory Art in Nature Trail, Northcliffe, WA. Image by the author, 2014.Memory is naturally place-oriented or at least place-supported (Feld 201). Topaesthesia (sense of place) denotes movement that connects our biography with our route. This is resonant for the experience of regional character, including the tactile, olfactory, gustatory, visual, and auditory qualities of a place (Ryan 307). By walking, we are in a dialogue with the environment; both literally and figuratively, we re-situate ourselves into our story (Schine 100). For example, during a summer exploration of the trail (5 Jan. 2014), I intuited a personal attachment based on my grandfather’s small bush home being razed by fire, and his struggle to support seven children.Understory’s survival depends on vigilant controlled (cool) burns around its perimeter (Figure 3), organised by volunteer Peter Hill. These burns also hone the forest. On 27 Sept. 2014, the charred vegetation spoke a spring language of opportunity for nature to reassert itself as seedpods burst and continue the cycle; while an autumn walk (17 Mar. 2016) yielded a fresh view of forest colour, patterning, light, shade, and sound.Figure 3. Understory Art in Nature Trail. Map Created by Fiona Sinclair for Southern Forest Sculpture Walk Catalogue (2006). Courtesy Southern Forest Arts, Northcliffe, WA.Understory and the Melody of CanopyForest resilience is celebrated in five MP3 audio tours produced for visitors to dialogue with the trail in sensory contexts of music, poetry, sculptures and stories that name or interpret the setting. The trail starts in heathland and includes three creek crossings. A zone of acacias gives way to stands of the southwest signature trees karri (Eucalyptus diversicolor), jarrah (Eucalyptus marginata), and marri (Corymbia calophylla). Following a sheoak grove, a riverine environment re-enters heathland. Birds, insects, mammals, and reptiles reside around and between the sculptures, rendering the earth-embedded art a fusion of human and natural orders (concept after Relph 141). On Audio Tour 3, Songs for the Southern Forests, the musician-composers reflect on their regionally focused items, each having been birthed according to a personal musical concept (the manner in which an individual artist holds the totality of a composition in cultural context). Arguably the music in question, its composers, performers, audiences, and settings, all have a role to play in defining the processes and effects of forest arts ecology. Local musician Ann Rice billeted a cluster of musicians (mostly from Perth) at her Windy Harbour shack. The energy of the production experience was palpable as all participated in on-site forest workshops, and supported each other’s items as a musical collective (A. Rice, telephone interview, 2 Oct. 2014). Collaborating under producer Lee Buddle’s direction, they orchestrated rich timbres (tone colours) to evoke different musical atmospheres (Table 1). Composer/Performer Title of TrackInstrumentation1. Ann RiceMy Placevocals/guitars/accordion 2. David PyeCicadan Rhythmsangklung/violin/cello/woodblocks/temple blocks/clarinet/tapes 3. Mel RobinsonSheltervocal/cello/double bass 4. DjivaNgank Boodjakvocals/acoustic, electric and slide guitars/drums/percussion 5. Cathie TraversLamentaccordion/vocals/guitar/piano/violin/drums/programming 6. Brendon Humphries and Kevin SmithWhen the Wind First Blewvocals/guitars/dobro/drums/piano/percussion 7. Libby HammerThe Gladevocal/guitar/soprano sax/cello/double bass/drums 8. Pete and Dave JeavonsSanctuaryguitars/percussion/talking drum/cowbell/soprano sax 9. Tomás FordWhite Hazevocal/programming/guitar 10. David HyamsAwakening /Shaking the Tree /When the Light Comes guitar/mandolin/dobro/bodhran/rainstick/cello/accordion/flute 11. Bernard CarneyThe Destiny Waltzvocal/guitar/accordion/drums/recording of The Destiny Waltz 12. Joel BarkerSomething for Everyonevocal/guitars/percussion Table 1. Music Composed for Canopy: Songs for the Southern Forests.Source: CD sleeve and http://www.understory.com.au/art.php. Composing out of their own strengths, the musicians transformed the geographic region into a living myth. As Pedelty has observed of similar musicians, “their sounds resonate because they so profoundly reflect our living sense of place” (83-84). The remainder of this essay evidences the capacity of indigenous song, art music, electronica, folk, and jazz-blues to celebrate, historicise, or re-imagine place. Firstly, two items represent the phenomenological approach of site-specific sensitivity to acoustic, biological, and cultural presence/loss, including the materiality of forest as a living process.“Singing Up the Land”In Aboriginal Australia “there is no place that has not been imaginatively grasped through song, dance and design, no place where traditional owners cannot see the imprint of sacred creation” (Rose 18). Canopy’s part-Noongar language song thus repositions the ancient Murrum-Noongar people within their life-sustaining natural habitat and spiritual landscape.Noongar Yorga woman Della Rae Morrison of the Bibbulmun and Wilman nations co-founded The Western Australian Nuclear Free Alliance to campaign against the uranium mining industry threatening Ngank Boodjak (her country, “Mother Earth”) (D.R. Morrison, e-mail, 15 July 2014). In 2004, Morrison formed the duo Djiva (meaning seed power or life force) with Jessie Lloyd, a Murri woman of the Guugu Yimidhirr Nation from North Queensland. After discerning the fundamental qualities of the Understory site, Djiva created the song Ngank Boodjak: “This was inspired by walking the trail […] feeling the energy of the land and the beautiful trees and hearing the birds. When I find a spot that I love, I try to feel out the lay-lines, which feel like vortexes of energy coming out of the ground; it’s pretty amazing” (Morrison in SFA Canopy sleeve) Stanza 1 points to the possibilities of being more fully “in country”:Ssh!Ni dabarkarn kooliny, ngank boodja kookoorninyListen, walk slowly, beautiful Mother EarthThe inclusion of indigenous language powerfully implements an indigenous interpretation of forest: “My elders believe that when we leave this life from our physical bodies that our spirit is earthbound and is living in the rocks or the trees and if you listen carefully you might hear their voices and maybe you will get some answers to your questions” (Morrison in SFA Catalogue).Cicadan Rhythms, by composer David Pye, echoes forest as a lively “more-than-human” world. Pye took his cue from the ambient pulsing of male cicadas communicating in plenum (full assembly) by means of airborne sound. The species were sounding together in tempo with individual rhythm patterns that interlocked to create one fantastic rhythm (Australian Broadcasting Corporation, Composer David Pye). The cicada chorus (the loudest known lovesong in the insect world) is the unique summer soundmark (term coined by Truax Handbook, Website) of the southern forests. Pye chased various cicadas through Understory until he was able to notate the rhythms of some individuals in a patch of low-lying scrub.To simulate cicada clicking, the composer set pointillist patterns for Indonesian anklung (joint bamboo tubes suspended within a frame to produce notes when the frame is shaken or tapped). Using instruments made of wood to enhance the rich forest imagery, Pye created all parts using sampled instrumental sounds placed against layers of pre-recorded ambient sounds (D. Pye, telephone interview, 3 Sept. 2014). He takes the listener through a “geographical linear representation” of the trail: “I walked around it with a stopwatch and noted how long it took to get through each section of the forest, and that became the musical timing of the various parts of the work” (Pye in SFA Canopy sleeve). That Understory is a place where reciprocity between nature and culture thrives is, likewise, evident in the remaining tracks.Musicalising Forest History and EnvironmentThree tracks distinguish Canopy as an integrative site for memory. Bernard Carney’s waltz honours the Group Settlers who battled insurmountable terrain without any idea of their destiny, men who, having migrated with a promise of owning their own dairy farms, had to clear trees bare-handedly and build furniture from kerosene tins and gelignite cases. Carney illuminates the culture of Saturday night dancing in the schoolroom to popular tunes like The Destiny Waltz (performed on the Titanic in 1912). His original song fades to strains of the Victor Military Band (1914), to “pay tribute to the era where the inspiration of the song came from” (Carney in SFA Canopy sleeve). Likewise Cathie Travers’s Lament is an evocation of remote settler history that creates a “feeling of being in another location, other timezone, almost like an endless loop” (Travers in SFA Canopy sleeve).An instrumental medley by David Hyams opens with Awakening: the morning sun streaming through tall trees, and the nostalgic sound of an accordion waltz. Shaking the Tree, an Irish jig, recalls humankind’s struggle with forest and the forces of nature. A final title, When the Light Comes, defers to the saying by conservationist John Muir that “The wrongs done to trees, wrongs of every sort, are done in the darkness of ignorance and unbelief, for when the light comes the heart of the people is always right” (quoted by Hyams in SFA Canopy sleeve). Local musician Joel Barker wrote Something for Everyone to personify the old-growth karri as a king with a crown, with “wisdom in his bones.”Kevin Smith’s father was born in Northcliffe in 1924. He and Brendon Humphries fantasise the untouchability of a maiden (pre-human) moment in a forest in their song, When the Wind First Blew. In Libby Hammer’s The Glade (a lover’s lament), instrumental timbres project their own affective languages. The jazz singer intended the accompanying double bass to speak resonantly of old-growth forest; the cello to express suppleness and renewal; a soprano saxophone to impersonate a bird; and the drums to imitate the insect community’s polyrhythmic undercurrent (after Hammer in SFA Canopy sleeve).A hybrid aural environment of synthetic and natural forest sounds contrasts collision with harmony in Sanctuary. The Jeavons Brothers sampled rustling wind on nearby Mt Chudalup to absorb into the track’s opening, and crafted a snare groove for the quirky eco-jazz/trip-hop by banging logs together, and banging rocks against logs. This imaginative use of percussive found objects enhanced their portrayal of forest as “a living, breathing entity.”In dealing with recent history in My Place, Ann Rice cameos a happy childhood growing up on a southwest farm, “damming creeks, climbing trees, breaking bones and skinning knees.” The rich string harmonies of Mel Robinson’s Shelter sculpt the shifting environment of a brewing storm, while White Haze by Tomás Ford describes a smoky controlled burn as “a kind of metaphor for the beautiful mystical healing nature of Northcliffe”: Someone’s burning off the scrubSomeone’s making sure it’s safeSomeone’s whiting out the fearSomeone’s letting me breathe clearAs Sinclair illuminates in a post-fire interview with Sharon Kennedy (Website):When your map, your personal map of life involves a place, and then you think that that place might be gone…” Fiona doesn't finish the sentence. “We all had to face the fact that our little place might disappear." Ultimately, only one house was lost. Pasture and fences, sheds and forest are gone. Yet, says Fiona, “We still have our town. As part of SFA’s ongoing commission, forest rhythm workshops explore different sound properties of potential materials for installing sound sculptures mimicking the surrounding flora and fauna. In 2015, SFA mounted After the Burn (a touring photographic exhibition) and Out of the Ashes (paintings and woodwork featuring ash, charcoal, and resin) (SFA, After the Burn 116). The forthcoming community project Rising From the Ashes will commemorate the fire and allow residents to connect and create as they heal and move forward—ten years on from the foundation of Understory.ConclusionThe Understory Art in Nature Trail stimulates curiosity. It clearly illustrates links between place-based social, economic and material conditions and creative practices and products within a forest that has both given shelter and “done people in.” The trail is an experimental field, a transformative locus in which dedicated physical space frees artists to culturalise forest through varied aesthetic modalities. Conversely, forest possesses agency for naturalising art as a symbol of place. Djiva’s song Ngank Boodjak “sings up the land” to revitalise the timelessness of prior occupation, while David Pye’s Cicadan Rhythms foregrounds the seasonal cycle of entomological music.In drawing out the richness and significance of place, the ecologically inspired album Canopy suggests that the community identity of a forested place may be informed by cultural, economic, geographical, and historical factors as well as endemic flora and fauna. Finally, the musical representation of place is not contingent upon blatant forms of environmentalism. The portrayals of Northcliffe respectfully associate Western Australian people and forests, yet as a place, the town has become an enduring icon for the plight of the Universal Old-growth Forest in all its natural glory, diverse human uses, and (real or perceived) abuses.ReferencesAustralian Broadcasting Commission. “Canopy: Songs for the Southern Forests.” Into the Music. Prod. Robyn Johnston. Radio National, 5 May 2007. 12 Aug. 2014 <http://www.abc.net.au/radionational/programs/intothemusic/canopy-songs-for-the-southern-forests/3396338>.———. “Composer David Pye.” Interview with Andrew Ford. The Music Show, Radio National, 12 Sep. 2009. 30 Jan. 2015 <http://canadapodcasts.ca/podcasts/MusicShowThe/1225021>.Berg, Peter, and Raymond Dasmann. “Reinhabiting California.” Reinhabiting a Separate Country: A Bioregional Anthology of Northern California. Ed. Peter Berg. San Francisco: Planet Drum, 1978. 217-20.Crawford, Patricia, and Ian Crawford. Contested Country: A History of the Northcliffe Area, Western Australia. Perth: UWA P, 2003.Feld, Steven. 2001. “Lift-Up-Over Sounding.” The Book of Music and Nature: An Anthology of Sounds, Words, Thoughts. Ed. David Rothenberg and Marta Ulvaeus. Middletown, CT: Wesleyan UP, 2001. 193-206.Giblett, Rod. People and Places of Nature and Culture. Bristol: Intellect, 2011.Kato, Kumi. “Addressing Global Responsibility for Conservation through Cross-Cultural Collaboration: Kodama Forest, a Forest of Tree Spirits.” The Environmentalist 28.2 (2008): 148-54. 15 Apr. 2014 <http://link.springer.com/article/10.1007/s10669-007-9051-6#page-1>.Kennedy, Sharon. “Local Knowledge Builds Vital Support Networks in Emergencies.” ABC South West WA, 10 Mar. 2015. 26 Mar. 2015 <http://www.abc.net.au/local/stories/2015/03/09/4193981.htm?site=southwestwa>.Morrison, Della Rae. E-mail. 15 July 2014.Pedelty, Mark. Ecomusicology: Rock, Folk, and the Environment. Philadelphia, PA: Temple UP, 2012.Pye, David. Telephone interview. 3 Sep. 2014.Relph, Edward. Place and Placelessness. London: Pion, 1976.Rice, Ann. Telephone interview. 2 Oct. 2014.Rose, Deborah Bird. Nourishing Terrains: Australian Aboriginal Views of Landscape and Wilderness. Australian Heritage Commission, 1996.Ryan, John C. Green Sense: The Aesthetics of Plants, Place and Language. Oxford: Trueheart Academic, 2012.Schine, Jennifer. “Movement, Memory and the Senses in Soundscape Studies.” Canadian Acoustics: Journal of the Canadian Acoustical Association 38.3 (2010): 100-01. 12 Apr. 2016 <http://jcaa.caa-aca.ca/index.php/jcaa/article/view/2264>.Sinclair, Fiona. Telephone interview. 6 Apr. 2014.Sinclair, Fiona, and Peter Hill. Personal Interview. 26 Sep. 2014.Southern Forest Arts. Canopy: Songs for the Southern Forests. CD coordinated by Fiona Sinclair. Recorded and produced by Lee Buddle. Sleeve notes by Robyn Johnston. West Perth: Sound Mine Studios, 2006.———. Southern Forest Sculpture Walk Catalogue. Northcliffe, WA, 2006. Unpaginated booklet.———. Understory—Art in Nature. 2009. 12 Apr. 2016 <http://www.understory.com.au/>.———. Trailguide. Understory. Presented by Southern Forest Arts, n.d.———. After the Burn: Stories, Poems and Photos Shared by the Local Community in Response to the 2015 Northcliffe and Windy Harbour Bushfire. 2nd ed. Ed. Fiona Sinclair. Northcliffe, WA., 2016.Truax, Barry, ed. Handbook for Acoustic Ecology. 2nd ed. Cambridge Street Publishing, 1999. 10 Apr. 2016 <http://www.sfu.ca/sonic-studio/handbook/Soundmark.html>.

In 1956, John Cage predicted that “in the future, records will be made from records” (Duffel, 202). Certainly, musical creativity has always involved a certain amount of appropriation and adaptation of previous works. For example, Vivaldi appropriated and adapted the “Cum sancto spiritu” fugue of Ruggieri’s Gloria (Burnett, 4; Forbes, 261). If stuck for a guitar solo on stage, Keith Richards admits that he’ll adapt Buddy Holly for his own purposes (Street, 135). Similarly, Nirvana adapted the opening riff from Killing Jokes’ “Eighties” for their song “Come as You Are”. Musical “quotation” is actively encouraged in jazz, and contemporary hip-hop would not exist if the genre’s pioneers and progenitors had not plundered and adapted existing recorded music. Sampling technologies, however, have taken musical adaptation a step further and realised Cage’s prediction. Hardware and software samplers have developed to the stage where any piece of audio can be appropriated and adapted to suit the creative impulses of the sampling musician (or samplist). The practice of sampling challenges established notions of creativity, with whole albums created with no original musical input as most would understand it—literally “records made from records.” Sample-based music is premised on adapting audio plundered from the cultural environment. This paper explores the ways in which technology is used to adapt previous recordings into new ones, and how musicians themselves have adapted to the potentials of digital technology for exploring alternative approaches to musical creativity. Sampling is frequently defined as “the process of converting an analog signal to a digital format.” While this definition remains true, it does not acknowledge the prevalence of digital media. The “analogue to digital” method of sampling requires a microphone or instrument to be recorded directly into a sampler. Digital media, however, simplifies the process. For example, a samplist can download a video from YouTube and rip the audio track for editing, slicing, and manipulation, all using software within the noiseless digital environment of the computer. Perhaps it is more prudent to describe sampling simply as the process of capturing sound. Regardless of the process, once a sound is loaded into a sampler (hardware or software) it can be replayed using a MIDI keyboard, trigger pad or sequencer. Use of the sampled sound, however, need not be a faithful rendition or clone of the original. At the most basic level of manipulation, the duration and pitch of sounds can be altered. The digital processes that are implemented into the Roland VariOS Phrase Sampler allow samplists to eliminate the pitch or melodic quality of a sampled phrase. The phrase can then be melodically redefined as the samplist sees fit: adapted to a new tempo, key signature, and context or genre. Similarly, software such as Propellerhead’s ReCycle slices drum beats into individual hits for use with a loop sampler such as Reason’s Dr Rex module. Once loaded into Dr Rex, the individual original drum sounds can be used to program a new beat divorced from the syncopation of the original drum beat. Further, the individual slices can be subjected to pitch, envelope (a component that shapes the volume of the sound over time) and filter (a component that emphasises and suppresses certain frequencies) control, thus an existing drum beat can easily be adapted to play a new rhythm at any tempo. For example, this rhythm was created from slicing up and rearranging Clyde Stubblefield’s classic break from James Brown’s “Funky Drummer”. Sonic adaptation of digital information is not necessarily confined to the auditory realm. An audio editor such as Sony’s Sound Forge is able to open any file format as raw audio. For example, a Word document or a Flash file could be opened with the data interpreted as audio. Admittedly, the majority of results obtained are harsh white noise, but there is scope for serendipitous anomalies such as a glitchy beat that can be extracted and further manipulated by audio software. Audiopaint is an additive synthesis application created by Nicolas Fournel for converting digital images into audio. Each pixel position and colour is translated into information designating frequency (pitch), amplitude (volume) and pan position in the stereo image. The user can determine which one of the three RGB channels corresponds to either of the stereo channels. Further, the oscillator for the wave form can be either the default sine wave or an existing audio file such as a drum loop can be used. The oscillator shapes the end result, responding to the dynamics of the sine wave or the audio file. Although Audiopaint labours under the same caveat as with the use of raw audio, the software can produce some interesting results. Both approaches to sound generation present results that challenge distinctions between “musical sound” and “noise”. Sampling is also a cultural practice, a relatively recent form of adaptation extending out of a time honoured creative aesthetic that borrows, quotes and appropriates from existing works to create new ones. Different fields of production, as well as different commentators, variously use terms such as “co-creative media”, “cumulative authorship”, and “derivative works” with regard to creations that to one extent or another utilise existing works in the production of new ones (Coombe; Morris; Woodmansee). The extent of the sampling may range from subtle influence to dominating significance within the new work, but the constant principle remains: an existing work is appropriated and adapted to fit the needs of the secondary creator. Proponents of what may be broadly referred to as the “free culture” movement argue that creativity and innovation inherently relies on the appropriation and adaptation of existing works (for example, see Lessig, Future of Ideas; Lessig, Free Culture; McLeod, Freedom of Expression; Vaidhyanathan). For example, Gwen Stefani’s 2004 release “Rich Girl” is based on Louchie Lou and Michie One’s 1994 single of the same title. Lou and One’s “Rich Girl”, in turn, is a reggae dance hall adaptation of “If I Were a Rich Man” from Fiddler on the Roof. Stefani’s “na na na” vocal riff shares the same melody as the “Ya ha deedle deedle, bubba bubba deedle deedle dum” riff from Fiddler on the Roof. Samantha Mumba adapted David Bowie’s “Ashes to Ashes” for her second single “Body II Body”. Similarly, Richard X adapted Tubeway Army’s “Are ‘Friends’ Electric?’ and Adina Howard’s “Freak Like Me” for a career saving single for Sugababes. Digital technologies enable and even promote the adaptation of existing works (Morris). The ease of appropriating and manipulating digital audio files has given rise to a form of music known variously as mash-up, bootleg, or bastard pop. Mash-ups are the most recent stage in a history of musical appropriation and they epitomise the sampling aesthetic. Typically produced in bedroom computer-based studios, mash-up artists use software such as Acid or Cool Edit Pro to cut up digital music files and reassemble the fragments to create new songs, arbitrarily adding self-composed parts if desired. Comprised almost exclusively from sections of captured music, mash-ups have been referred to as “fictional pop music” because they conjure up scenarios where, for example, Destiny’s Child jams in a Seattle garage with Nirvana or the Spice Girls perform with Nine Inch Nails (Petridis). Once the initial humour of the novelty has passed, the results can be deeply alluring. Mash-ups extract the distinctive characteristics of songs and place them in new, innovative contexts. As Dale Lawrence writes: “the vocals are often taken from largely reviled or ignored sources—cornball acts like Aguilera or Destiny’s Child—and recast in wildly unlikely contexts … where against all odds, they actually work”. Similarly, Crawford argues that “part of the art is to combine the greatest possible aesthetic dissonance with the maximum musical harmony. The pleasure for listeners is in discovering unlikely artistic complementarities and revisiting their musical memories in mutated forms” (36). Sometimes the adaptation works in the favour of the sampled artist: George Clinton claims that because of sampling he is more popular now than in 1976—“the sampling made us big again” (Green). The creative aspect of mash-ups is unlike that usually associated with musical composition and has more in common with DJing. In an effort to further clarify this aspect, we may regard DJ mixes as “mash-ups on the fly.” When Grandmaster Flash recorded his quilt-pop masterpiece, “Adventures of Grandmaster Flash on the Wheels of Steel,” it was recorded while he performed live, demonstrating his precision and skill with turntables. Modern audio editing software facilitates the capture and storage of sound, allowing mash-up artists to manipulate sounds bytes outside of “real-time” and the live performance parameters within which Flash worked. Thus, the creative element is not the traditional arrangement of chords and parts, but rather “audio contexts”. If, as Riley pessimistically suggests, “there are no new chords to be played, there are no new song structures to be developed, there are no new stories to be told, and there are no new themes to explore,” then perhaps it is understandable that artists have searched for new forms of musical creativity. The notes and chords of mash-ups are segments of existing works sequenced together to produce inter-layered contexts rather than purely tonal patterns. The merit of mash-up culture lies in its function of deconstructing the boundaries of genre and providing new musical possibilities. The process of mashing-up genres functions to critique contemporary music culture by “pointing a finger at how stifled and obvious the current musical landscape has become. … Suddenly rap doesn’t have to be set to predictable funk beats, pop/R&B ballads don’t have to come wrapped in cheese, garage melodies don’t have to recycle the Ramones” (Lawrence). According to Theodor Adorno, the Frankfurt School critic, popular music (of his time) was irretrievably simplistic and constructed from easily interchangeable, modular components (McLeod, “Confessions”, 86). A standardised and repetitive approach to musical composition fosters a mode of consumption dubbed by Adorno “quotation listening” and characterised by passive acceptance of, and obsession with, a song’s riffs (44-5). As noted by Em McAvan, Adorno’s analysis elevates the producer over the consumer, portraying a culture industry controlling a passive audience through standardised products (McAvan). The characteristics that Adorno observed in the popular music of his time are classic traits of contemporary popular music. Mash-up artists, however, are not representative of Adorno’s producers for a passive audience, instead opting to wrest creative control from composers and the recording industry and adapt existing songs in pursuit of their own creative impulses. Although mash-up productions may consciously or unconsciously criticise the current state of popular music, they necessarily exist in creative symbiosis with the commercial genres: “if pop songs weren’t simple and formulaic, it would be much harder for mashup bedroom auteurs to do their job” (McLeod, “Confessions”, 86). Arguably, when creating mash-ups, some individuals are expressing their dissatisfaction with the stagnation of the pop industry and are instead working to create music that they as consumers wish to hear. Sample-based music—as an exercise in adaptation—encourages a Foucauldian questioning of the composer’s authority over their musical texts. Recorded music is typically a passive medium in which the consumer receives the music in its original, unaltered form. DJ Dangermouse (Brian Burton) breached this pact to create his Grey Album, which is a mash-up of an a cappella version of Jay-Z’s Black Album and the Beatles’ eponymous album (also known as the White Album). Dangermouse says that “every kick, snare, and chord is taken from the Beatles White Album and is in their original recording somewhere.” In deconstructing the Beatles’ songs, Dangermouse turned the recordings into a palette for creating his own new work, adapting audio fragments to suit his creative impulses. As Joanna Demers writes, “refashioning these sounds and reorganising them into new sonic phrases and sentences, he creates acoustic mosaics that in most instances are still traceable to the Beatles source, yet are unmistakeably distinct from it” (139-40). Dangermouse’s approach is symptomatic of what Schütze refers to as remix culture: an open challenge to a culture predicated on exclusive ownership, authorship, and controlled distribution … . Against ownership it upholds an ethic of creative borrowing and sharing. Against the original it holds out an open process of recombination and creative transformation. It equally calls into question the categories, rifts and borders between high and low cultures, pop and elitist art practices, as well as blurring lines between artistic disciplines. Using just a laptop, an audio editor and a calculator, Gregg Gillis, a.k.a. Girl Talk, created the Night Ripper album using samples from 167 artists (Dombale). Although all the songs on Night Ripper are blatantly sampled-based, Gillis sees his creations as “original things” (Dombale). The adaptation of sampled fragments culled from the Top 40 is part of Gillis’ creative process: “It’s not about who created this source originally, it’s about recontextualising—creating new music. … I’ve always tried to make my own songs” (Dombale). Gillis states that his music has no political message, but is a reflection of his enthusiasm for pop music: “It’s a celebration of everything Top 40, that’s the point” (Dombale). Gillis’ “celebratory” exercises in creativity echo those of various fan-fiction authors who celebrate the characters and worlds that constitute popular culture. Adaptation through sampling is not always centred solely on music. Sydney-based Tom Compagnoni, a.k.a. Wax Audio, adapted a variety of sound bytes from politicians and media personalities including George W. Bush, Alexander Downer, Alan Jones, Ray Hadley, and John Howard in the creation of his Mediacracy E.P.. In one particular instance, Compagnoni used a myriad of samples culled from various media appearances by George W. Bush to recreate the vocals for John Lennon’s Imagine. Created in early 2005, the track, which features speeded-up instrumental samples from a karaoke version of Lennon’s original, is an immediate irony fuelled comment on the invasion of Iraq. The rationale underpinning the song is further emphasised when “Imagine This” reprises into “Let’s Give Peace a Chance” interspersed with short vocal fragments of “Come Together”. Compagnoni justifies his adaptations by presenting appropriated media sound bytes that deliberately set out to demonstrate the way information is manipulated to present any particular point of view. Playing the media like an instrument, Wax Audio juxtaposes found sounds in a way that forces the listener to confront the bias, contradiction and sensationalism inherent in their daily intake of media information. … Oh yeah—and it’s bloody funny hearing George W Bush sing “Imagine”. Notwithstanding the humorous quality of the songs, Mediacracy represents a creative outlet for Compagnoni’s political opinions that is emphasised by the adaptation of Lennon’s song. Through his adaptation, Compagnoni revitalises Lennon’s sentiments about the Vietnam War and superimposes them onto the US policy on Iraq. An interesting aspect of sampled-based music is the re-occurrence of particular samples across various productions, which demonstrates that the same fragment can be adapted for a plethora of musical contexts. For example, Clyde Stubblefield’s “Funky Drummer” break is reputed to be the most sampled break in the world. The break from 1960s soul/funk band the Winstons’ “Amen Brother” (the B-side to their 1969 release “Color Him Father”), however, is another candidate for the title of “most sampled break”. The “Amen break” was revived with the advent of the sampler. Having featured heavily in early hip-hop records such as “Words of Wisdom” by Third Base and “Straight Out of Compton” by NWA, the break “appears quite adaptable to a range of music genres and tastes” (Harrison, 9m 46s). Beginning in the early 1990s, adaptations of this break became a constant of jungle music as sampling technology developed to facilitate more complex operations (Harrison, 5m 52s). The break features on Shy FX’s “Original Nutta”, L Double & Younghead’s “New Style”, Squarepusher’s “Big Acid”, and a cover version of Led Zepplin’s “Whole Lotta Love” by Jane’s Addiction front man Perry Farrell. This is to name but a few tracks that have adapted the break. Wikipedia offers a list of songs employing an adaptation of the “Amen break”. This list, however, falls short of the “hundreds of tracks” argued for by Nate Harrison, who notes that “an entire subculture based on this one drum loop … six seconds from 1969” has developed (8m 45s). The “Amen break” is so ubiquitous that, much like the twelve bar blues structure, it has become a foundational element of an entire genre and has been adapted to satisfy a plethora of creative impulses. The sheer prevalence of the “Amen break” simultaneously illustrates the creative nature of music adaptation as well as the potentials for adaptation stemming from digital technology such as the sampler. The cut-up and rearrangement aspect of creative sampling technology at once suggests the original but also something new and different. Sampling in general, and the phenomenon of the “Amen break” in particular, ensures the longevity of the original sources; sampled-based music exhibits characteristics acquired from the source materials, yet the illegitimate offspring are not their parents. Sampling as a technology for creatively adapting existing forms of audio has encouraged alternative approaches to musical composition. Further, it has given rise to a new breed of musician that has adapted to technologies of adaptation. Mash-up artists and samplists demonstrate that recorded music is not simply a fixed or read-only product but one that can be freed from the composer’s original arrangement to be adapted and reconfigured. Many mash-up artists such as Gregg Gillis are not trained musicians, but their ears are honed from enthusiastic consumption of music. 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(May 2007) "Amen to That: Sampling and Adapting the Past," M/C Journal, 10(2). Retrieved echo date('d M. Y'); ?> from <http://journal.media-culture.org.au/0705/09-collins.php>.