High-frequency global navigation satellite system’s receivers for airborne gravimetry

The development of global navigation satellite systems (GNSS) provides a solution of many applied problems with increasingly higher quality and accuracy nowadays. Researches that are carried out by the Bavarian Academy of Sciences and Humanities in Munich (BAW) in the field of airborne gravimetry are based on sophisticated data processing from high frequency GNSS receiver for kinematic aircraft positioning. Applied algorithms for inertial acceleration determination are based on the high sampling rate (50Hz) and on reducing of such factors as ionosphere scintillation and multipath at aircraft /antenna near field effects. The quality of the GNSS derived kinematic height are studied also by intercomparison with lift height variations collected by a precise high sampling rate vertical scale [1]. This work is aimed at the ways of more accurate determination of mini-aircraft altitude by means of high frequency GNSS receivers, in particular by considering their dynamic behaviour.

Extremely non-equilibrium synthesis of luminescent zinc oxide nanoparticles through energetic ion condensation in a dense plasma focus device

Luminescent ZnO nanoparticles have been synthesized on silicon and quartz substrates under extremely non-equilibrium conditions of energetic ion condensation during the post-focus phase in a dense plasma focus (DPF) device. Ar+, O+, Zn+ and ZnO+ ions are generated as a result of interaction of hot and dense argon plasma focus with the surfaces of ZnO pellets placed at the anode. It is found that the sizes, structural and photoluminescence (PL) properties of the ZnO nanoparticles appear to be quite different on Si(1 0 0) and quartz substrates. The results of x-ray diffractometry and atomic force microscopy show that the ZnO nanoparticles are crystalline and range in size from 5-7 nm on Si(1 0 0) substrates to 10-38 nm on quartz substrates. Room-temperature PL studies reveal strong peaks related to excitonic bands and defects for the ZnO nanoparticles deposited on Si (1 0 0), whereas the excitonic bands are not excited in the quartz substrate case. Raman studies indicate the presence of E2 (high) mode for ZnO nanoparticles deposited on Si(1 0 0).

Numerical modeling of thin steel roof battens under wind uplift loads

Extreme wind events such as tropical cyclones, tornadoes and storms are more likely to impact the Australian coastal regions due to possible climate changes. Such events can be extremely destructive to building structures, in particular, low-rise buildings with lightweight roofing systems that are commonly made of thin steel roofing sheets and battens. Large wind uplift loads that act on the roofs during high wind events often cause premature roof connection failures. Recent wind damage investigations have shown that roof failures have mostly occurred at the batten to rafter or truss screw connections. In most of these cases, the screw fastener heads pulled through the bottom flanges of thin steel roof battens. This roof connection failure is very critical as both roofing sheets and battens will be lost during the high wind events. Hence, a research study was conducted to investigate this critical pull-through failure using both experimental and numerical methods. This paper presents the details of numerical modeling and the results.

Atmospheres : Aesthetics of emotional spaces[Review]

More problematic than his avoidance of recent geographic scholarship is his treatment of indigenous, ethnographic and postcolonial perspectives on island life. Not only is much of this scholarship absent, the bits that are there are mostly derided. He slams Kamau Braithwaite and his concept of ‘tidalectics’ as ‘unpackable’ (p. 20) and also claims that Greg Dening’s approach to islands as having ‘permeable cultural boundaries’ has ‘intellectual costs’ (p. 23). In a section of the book on ‘Naming and Sovereignty’, instead of an in-depth examination of the processes of decoding and recoding that goes on in indigenous island landscapes under colonialism (as could be discussed at length if Shell chose to examine Aotearoa, Hawaii, or hundreds of other places) we are instead presented a vignette about his childhood street fights with other kids over the naming of a hometown island in Canada, as well as ruminations about what Herman Melville and Ellen Semple thought of islands in the nineteenth century. In short, if you want to know what dead Caucasians like Shakespeare, Melville, Kant, Mackinder, More, and ancient Athenians thought about islands, then this book is a good resource. If, however, you are looking for information about what islands are like today – and what they mean to the people who live on and interact with them – then you will have to look elsewhere.

(Ap)pointing the canon Rousseau's Émile, visions of the state, and education

Jean-Jacques Rousseau’s Émile, ou de I’Education (Émile, or on Education) has been described by Rousseau scholars in latter twentieth century English-language philosophy as an educational classic. In 1995 Robert Wokler argued that together with Montesquieu, Hume, Smith, and Kant among his contemporaries, Rousseau had exerted the most profound influence on modern European intellectual history, “perhaps even surpassing anyone else of his day." For Wokler Émile is “the most significant work on education after Plato’s Republic.” Earlier in 1977, Allan Bloom questioned why Émile had not been the subject of analysis in philosophy relative to the rest of Rousseau‘s work, for “Émile is truly a great book, one that lays out for the first time and with the greatest clarity and vitality the modern way of posing the problems of psychology.” Bloom also saw Émile as “one of those rare total or synoptic books... a book comparable to Plato’s Republic, which it is meant to rival or supersede” and argued that Rousseau himself was at the source of a new tradition: “Whatever else Rousseau may have accomplished, he presented alternatives available to man more comprehensively and profoundly and articulated them in the form which has dominated discussion since his time." Even Peter Gay’s earlier commentary on John Locke and education in 1964 could not escape this central positioning of the text. The significance of Locke’s Some Thoughts on Education is weighed in relation to its impact on Rousseau‘s Émile. For Gay, the latter is “probably the most influential revolutionary tract on education that we have.”

LISA as a dark energy probe

Recently, it has been shown that the inclusion of higher signal harmonics in the inspiral signals of binary supermassive black holes (SMBH) leads to dramatic improvements in the parameter estimation with Laser Interferometer Space Antenna (LISA). In particular, the angular resolution becomes good enough to identify the host galaxy or galaxy cluster, in which case the redshift can be determined by electromagnetic means. The gravitational wave signal also provides the luminosity distance with high accuracy, and the relationship between this and the redshift depends sensitively on the cosmological parameters, such as the equation-of-state parameter w = p(DE)/rho(DE) of dark energy. Using binary SMBH events at z < 1 with appropriate masses and orientations, one would be able to constrain w to within a few per cent. We show that, if the measured sky location is folded into the error analysis, the uncertainty on w goes down by an additional factor of 2-3, leaving weak lensing as the only limiting factor in using LISA as a dark energy probe.

At the Limits of Presentation : Coming-into-Presence and its Aesthetic Relevance in Jean-Luc Nancy's Philosophy

This study investigates the significance of art in Jean-Luc Nancy s philosophy. I argue that the notion of art contributes to some of Nancy s central ontological ideas. Therefore, I consider art s importance in its own right whether art does have ontological significance, and if so, how one should describe this with respect to the theme of presentation. According to my central argument, with his thinking on art Nancy attempts to give one viewpoint to what is called the metaphysics of presence and to its deconstruction. On which grounds, as I propose, may one say that art is not reducible to philosophy? The thesis is divided into two main parts. The first part, Presentation as a Philosophical Theme, is a historical genesis of the central concepts associated with the birth of presentation in Nancy s philosophy. I examine this from the viewpoint of the differentiation between the ontological notions of presentation and representation by concentrating on the influence of Martin Heidegger and Jacques Derrida, as well as of Hegel and Kant. I give an overview of the way in which being or sense for Nancy is to be described as a coming-into-presence or presentation . Therefore, being takes place in its singular plurality. I argue that Nancy redevelops Heidegger s account of being in two principal ways: first, in rethinking the ontico-ontological difference, and secondly, by striving to radicalize the Heideggerian concept of Mitsein, being-with . I equally wish to show the importance of Derrida s notion of différance and its inherence in Nancy s questioning of being that rests on the unfoundedness of existence. The second part, From Ontology to Art, draws on the importance of art and the aesthetic. If, in Nancy, the question of art touches upon its own limit as the limit of nothingness, how is art able to open its own strangeness and our exposure to this strangeness? My aim is to investigate how Nancy s thinking on art finds its place within the conceptual realm of its inherent difference and interval. My central concern is the thought of originary ungroundedness and the plurality of art and of the arts. As for the question of the difference between art and philosophy, I wish to show that what differentiates art from thought is the fact that art exposes what is obvious but not apparent, if apparent is understood in the sense of givenness. As for art s ability to deconstruct Nancy s ontological notions, I suggest that in question in art is its original heterogeneity and diversity. Art is a matter of differing art occurs singularly, as a local difference. With this in mind, I point out that in reflecting on art in terms of spacing and interval, as a thinker of difference Nancy comes closer to Derrida and his idea of différance than to the structure of Heidegger s ontological difference.

Waves in branched hydraulic pipes

The paper deals with the classical problem of axi-symmetric transmission of low amplitude waves through a circular pipe containing a viscous liquid. Exact governing equations are identified and solved, the radial as well as the axial component of the velocity being considered. Attention is drawn to certain fallacies underlying the conventional approach. The parameters required in the formulation of the transfer matrix for a pipe have been evaluated. In order to evaluate the response at the terminal point of a branched system for a sinusoidal input at one of the ends, a general algorithm has been developed.

Humanum : Hans Küngin maailmaneetos-projektin eettiset perusteet

Tutkimuksen tehtävänä on analysoida pitkän linjan katolisen ekumeenikon Hans Küngin uusinta uskontoteologista projektia. Sen perusajatuksen voi tiivistää seuraavasti: Uskonnoille on saatava yhteinen perusetiikka globaalin rauhan tavoittamiseksi. Lähdemateriaali koostuu Küngin 1980-luvulla alkaneen uskontoteologisen kauden tuotannosta. Tutkimusmetodina käytetään argumentatiivisesti painottunutta systemaattista analyysiä. Tarkoituksena on analysoida ja punnita premissejä, joilla Küng perustelee maailmaneetos-projektin tarpeellisuuden. Kolme käsitettä nousevat esiin: uskonto, maailmanrauha ja moraali. Nämä argumentit muodostavat samalla kontekstin, jossa Küngin teologiset perusprinsiipit tulevat esille. Küng käyttää sekä pragmatistista että filosofis-teologista metodia maailmaneetos-projektin perustelemisessa. Argumentatiivisen luonteensa vuoksi tutkielman ominaispiirre on keskustelevuus. Keskustelevuuteen liittyen tutkielmassa painottuu kriittinen näkökulma. Kokonaisanalyysissä hyödynnetään laajalti maailmaneetos-projektiin liittyvää kirjallisuutta ja varteenotettavia puheenvuoroja. Alussa esitellään Uskontojen maailmanparlamentin maailmaneetoksen julistus. Tämän asiakirjaan kohdistuvat kommenttipuheenvuorot muodostavat kontekstin, jonka piirissä Küngin projektiin liittyvää keskustelua usein käydään. Luvussa 2 käsitellään maailmaneetos-projektin ensimmäistä argumenttia, joka voidaan tiivistää seuraavasti: uskonto on välttämätön moraalin lähtökohta. Küngin pragmatistinen argumentti uskonnon puolesta on se, että uskonnot ovat käytännössä osoittautuneet parhaiksi moraalin vaalijoiksi. Küngin filosofis-teologinen argumentti puolestaan muodostuu väitteestä, että uskonto on myös teoreettisessa tarkastelussa ainoa kestävä vaihtoehto moraalin perustelemiselle. Küng perustaa jälkimmäisen argumentaationsa Kant-kritiikkiin. Kantin moraaliteorian tarkempi analyysi kuitenkin paljastaa, että maailmaneetos-projektin teologinen ansatsi on pikemminkin Kantin autonomiakäsitykselle analoginen. Luvussa 3 käsitellään toista argumenttia, joka kuvastuu olettamuksessa: maailmaneetos-projektin varsinainen päämäärä on maailmanrauha. Tällainen piirre viittaa reaalipolitiikkaan globaalissa mittakaavassa. Niistä muodostuu maailmaneetos-projektin pragmatistinen metodi tämän argumentin kohdalla. Maailmanrauha-argumenttia voidaan kuitenkin kritisoida sekä pragmatistiselta että filosofis-teologiselta kannalta. Tästä johtuen Küng itsekin viime kädessä hylkää pragmatismin ja nojaa filosofis-teologiseen argumentaatioon. Sen mukaan maailmanrauha ei voi olla ylin päämäärä, vaan moraali. Luvussa 4 moraalin keskeisyys maailmaneetos-projektissa tulee eksplisiittisesti ilmi. Vaikka Küng kritisoi pragmatistisen argumentaation turvin perinteisiä uskontoteologisia positioita epärealistismista,hän kuitenkin itse esittää filosofis-teologisen mallin totuuskriteeriksi kaikille uskonnoille. Tämän kriteerin eettinen osa on olennaisin ja Küng kutsuu sitä nimellä humanum. Tarkemmassa analyysissa humanum osoittautuu peruskantilaiseksi moraaliksi. Humanum on maailmaneetos-projektia strukturoiva filosofis-teologinen keskipiste. Tästä johtuen maailmaneetos-projekti altistuu kuitenkin uskontorealistiselle kritiikille: sen voidaan nähdä ajavan valistukseen perustuvaa klassista moraali-imperialismia vastoin uskontojen omaa itseymmärrystä. Tämä onkin projektin suurin ongelmakohta ainakin eettiseltä kannalta. Johtopäätöksenä voidaan todeta, että uskonnon rooli on maailmaneetos-projektissä korkeintaan moraalin käytännöllisenä motivaattorina. Maailmanrauha on sinänsä hyvä päämäärä, mutta vain siksi ja sikäli kuin se on sopusoinnussa Küngin humanistisen moraali-ihanteen kanssa. Küngin argumentaatio on pragmatistista ja hän vetoaa maailmaneetos-projektin argumentoinnissaan realismiin sekä poliittisella että uskontoteologisella tasolla. Tosiasiassa maailmaneetos-projektin voidaan nähdä perustuvan pragmatismin kanssa ristiriidassa oleviin ja siten myös epärealistisiin piilotavoitteisiin uskontojen moraalin länsimaistamisesta. Avainsanat: Globaali etiikka, uskontoteologia, teologinen etiikka, globalisaatio, rauha, Kant, pragmatismi

Determination of optimal trajectory under design constraints for a satellite launch vehicle

An optimal pitch steering programme of a solid-fuel satellite launch vehicle to maximize either (1) the injection velocity at a given altitude, or (2) the size of circular orbit, for a given payload is presented. The two-dimensional model includes the rotation of atmosphere with the Earth, the vehicle's lift and drag, variation of thrust with time and altitude, inverse-square gravitational field, and the specified initial vertical take-off. The inequality constraints on the aerodynamic load, control force, and turning rates are also imposed. Using the properties of the central force motion the terminal constraint conditions at coast apogee are transferred to the penultimate stage burnout. Such a transformation converts a time-free problem into a time-fixed one, reduces the number of terminal constraints, improves accuracy, besides demanding less computer memory and time. The adjoint equations are developed in a compact matrix form. The problem is solved on an IBM 360/44 computer using a steepest ascent algorithm. An illustrative analysis of a typical launch vehicle establishes the speed of convergence, and accuracy and applicability of the algorithm.

Ethics and Aesthetics : Intersections in Iris Murdoch's Philosophy

The study addresses the question concerning the relationship between ethics and aesthetics in the philosophy of Iris Murdoch. The main argument is that Murdoch s philosophy cannot be accurately understood without an understanding of the relationship she sees between the aesthetic experience and morality. Reading Murdoch s philosophy with this relationship in mind shows that it must be considered as a relevant alternative to the main forms of aesthetic-ethical theories. The study consists of seven previously published articles and a summary. It shows that Murdoch belongs to a tradition of philosophers who seek to broaden the scope of ethics by reference to aesthetic value and aesthetic experience. She sees an attitude responsible for aesthetic experiences as relevant for morality. However, she does not collapse morality into aesthetic experience. The two meet on the level of the subject s attitude towards its object, but there is a distinction between the experiences that accompany the attitudes. Aesthetic experiences can function as a clue to morals in that they present in a pleasing manner moral truths which otherwise might be psychologically too difficult to face. Murdoch equates the aesthetic attitude with virtuous love characterized by unselfish attention to its object. The primary object of such love is in Murdoch s account another human individual in her particularity. She compares the recognition of the other person as a particular existence to the experience of the Kantian sublime and offers her own version of the true sublime which is the experience of awe in the face of the infinity of the task of understanding others. One of the most central claims in Murdoch s philosophy is that human consciousness is evaluatively structured. This claim challenges the distinction between facts and values which has had an immense influence on modern moral philosophy. One argument with which Murdoch supports her claim is the nature of great literature. According to her, the standard of greatness in literature is the authors awareness of the independent existence of individuals in the particularity of their evaluative consciousnesses. The analysis of the standard of greatness in literature is also Murdoch s only argument for the claim that the primary object of the loving unselfish attention is the other particular individual. She is convinced that great literature reveals a deep truth about the human condition with its capacity to capture the particular. Abstract philo¬sophical discourse cannot compete with this capacity but it should take truths revealed by literature seriously in its theorising. Recognising this as Murdoch s stand on the question of the relation between philosophy and literature as forms of human discourse settles whether she is part of what has been called philosophy s turn to literature. The answer is yes.

Lessons from the Sparse Sensor Network Deployment in Rural India

We discuss the key issues in the deployment of sparse sensor networks. The network monitors several environment parameters and is deployed in a semi-arid region for the benefit of small and marginal farmers. We begin by discussing the problems of an existing unreliable 1 sq km sparse network deployed in a village. The proposed solutions are implemented in a new cluster. The new cluster is a reliable 5 sq km network. Our contributions are two fold. Firstly, we describe a. novel methodology to deploy a sparse reliable data gathering sensor network and evaluate the ``safe distance'' or ``reliable'' distance between nodes using propagation models. Secondly, we address the problem of transporting data from rural aggregation servers to urban data centres. This paper tracks our steps in deploying a sensor network in a village,in India, trying to provide better diagnosis for better crop management. Keywords - Rural, Agriculture, CTRS, Sparse.

Parametrized tests of post-Newtonian theory using Advanced LIGO and Einstein Telescope

General relativity has very specific predictions for the gravitational waveforms from inspiralling compact binaries obtained using the post-Newtonian (PN) approximation. We investigate the extent to which the measurement of the PN coefficients, possible with the second generation gravitational-wave detectors such as the Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO) and the third generation gravitational-wave detectors such as the Einstein Telescope (ET), could be used to test post-Newtonian theory and to put bounds on a subclass of parametrized-post-Einstein theories which differ from general relativity in a parametrized sense. We demonstrate this possibility by employing the best inspiralling waveform model for nonspinning compact binaries which is 3.5PN accurate in phase and 3PN in amplitude. Within the class of theories considered, Advanced LIGO can test the theory at 1.5PN and thus the leading tail term. Future observations of stellar mass black hole binaries by ET can test the consistency between the various PN coefficients in the gravitational-wave phasing over the mass range of 11-44M(circle dot). The choice of the lower frequency cutoff is important for testing post-Newtonian theory using the ET. The bias in the test arising from the assumption of nonspinning binaries is indicated.

Taide ja luova luonto : Goethen taideteorian luonnonfilosofinen perusta

J.W. von Goethen (1749-1832) merkitys ei rajoitu saksalaisen kirjallisuuden uudistamiseen. Hänen keskeisin antinsa filosofialle on pikemminkin hänen kehittämässään luonnontieteellisessä tutkimusmetodissa ja siinä ilmenevässä organistisessa luonnonfilosofiassa. Myös Goethen taideteoreettisia käsityksiä on hedelmällistä tutkia hänen luonnonfilosofiansa näkökulmasta. Tarkastelen pro gradu-tutkielmassani Goethen luontokäsityksen ja taidekäsityksen kehitystä välittömästi hänen Italiaan suuntautuvia matkojaan 1786 1789 ympäröivänä ajanjaksona. Tähän aikaan sijoittuivat paitsi morfologisen tutkimusmetodin syntyminen, myös Goethen kuvataiteellisten ihanteiden yhä vahvempi kääntyminen antiikin esikuvien puoleen. Tutkin Goethen luonnontutkimusten taustalla olevan tietoteoreettisen asenteen muotoutumista suhteessa tulkintoihin, joita hän muodosti Benedict de Spinozan ja Immanuel Kantin filosofiasta. Jäljitän hänen näin muodostuneen luonnonfilosofisen näkemyksensä ilmenemistä hänen Weimarin klassismia edustaneissa taideteoreettisissa kirjoituksissaan. Kysymykseni on, onko Goethen kuvaamassa luonnontieteellisessä tutkimusmetodissa yhtymäkohtia siihen tiehen, jota taiteilijan tai taiteentuntijan on hänen mielestään kuljettava päästäkseen oikeaan käsitykseen taiteesta. Analysoidakseni tarkemmin taiteellisen ja tieteellisen toiminnan samankaltaisuutta Goethella vertailen keskenään 1789 julkaistua tekstiä Einfache Nachahmung der Natur, Manier, Stil (Luonnon yksinkertainen jäljittely, maneeri, tyyli), joka pohtii taiteen kuvaustavan suhdetta todellisuuteen, sekä lyhyttä luonnontieteellistä metodia kuvaavaa tekstiä Erfahrung und Wissenschaft (Kokemus ja tiede) vuodelta 1798. Asetan rinnakkain luonnontutkijan etenemisen empiirisestä ja tieteellisestä ilmiöstä puhtaaseen ilmiöön eli alkuilmiöön ja taiteellisen toiminnan jatkumon luonnon yksinkertaisesta jäljittelystä maneeriin ja tyyliin. Epilogissa hahmottelen Goethen metodin yhtymäkohtia moderniin fenomenologiaan sekä arvioin Rudolf Steinerin (1861 1925) Goethen tietoteoriasta tekemää tulkintaa.