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Search Results: 1 - 10 of 288 matches for " Lauri Alha "
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Cross-Calibration of SMART-1 XSM with GOES and RHESSI
Mikko Vaananen,Lauri Alha,Juhani Huovelin
Physics , 2009,
Abstract: A number of X-ray instruments have been active in observing the solar coronal X-ray radiation this decade. We have compared XSM observations with simultaneous GOES and RHESSI observations. We present flux calibrations for all instruments, and compare XSM and GOES total emission measures (TEM) and temperatures (T). The model-independent flux comparison with XSM and GOES data at the 1 - 8 angstrom band shows that the fluxes agree with a ratio of 0.94 +/- 0.09 for the data up to April 2005. The Mewe model-dependent Ts and TEMs differ as XSM observes 1.47 +/- 0.03 times higher Ts than GOES and 1.23 +/- 0.08 times higher TEMs and 0.92 +/- 0.05 times lower fluxes. The comparison with RHESSI data at the 6 - 8 keV band shows that the average XSM/RHESSI flux ratio is 2.63 +/- 0.23. The discrepancies revealed in this study were similar to discrepancies observed in a number of other spaceborne cross-calibration studies.
Are the Typologies Determined by the Post-Critical Belief Scale Predicted Well by the Religious Attitudes and Behaviour of Maltese Undergraduate Students?  [PDF]
Mary Anne Lauri, Josef Lauri, Joseph Borg
Psychology (PSYCH) , 2011, DOI: 10.4236/psych.2011.25063
Abstract: Religious beliefs play an important role in the study of religious practices and behaviour. Wulff (1997) suggested that there are four basic attitudes towards religion: Literal Affirmation, Literal Disaffirmation, Reductive Interpretation and Restorative Interpretation. Building on this work, Duriez, Soenans and Hutsebaut (2005) constructed the Post-Critical Belief Scale (PCBS). In their work, Duriez at al. conducted a Principal Component Analysis of the responses to this questionnaire. It yielded two factors which partitioned 2-dimensional space into four quadrants corresponding to the four types of beliefs postulated by Wulff (1997). The research question which is addressed in this paper is whether there is an association between scores on the PCBS and religious practices and behaviour in a staunchly Catholic country like Malta where over 98% are baptized in the Roman Catholic Church. This question was addressed by administering a questionnaire to a random sample of 650 students at the University of Malta, of which 421 completed the questionnaire. Of those who answered the questionnaire, 349 were undergraduates. The questionnaire consisted of a number of questions about religious attitudes and behaviour, and also included the PCBS. The analysis of the association between membership of one of the four belief typologies and the participants’ responses to other questions related to religious beliefs, religious practice and sexual norms was carried out using Discriminant Analysis. The results indicate that, at least in this sample of Maltese university students, these three measures do a reasonably good job in identifying membership in three of Wulff’s four belief typologies.
Simulated performance of a single pixel PIN spectrometer SCXM equipped with concentrator optics in Solar coronal X-ray observations
L. Alha,J. Huovelin,J. Nevalainen
Physics , 2011, DOI: 10.1016/j.nima.2011.11.044
Abstract: In this paper we present simulated solar coronal X-ray observations to verify the sensitivity of a new hypothetical instrument design. These simulations are folded through this X-ray spectrometer having a moderate size circular field of view of 1.6 degrees. This SCXM (Solar Coronal X-ray Mapper) is designed to compose of a single pixel silicon PIN detector equipped with a single reflection double frustum X-ray optics. A moderate FoV would enable a morphological study of the expanded X-ray emission from the solar corona during a high activity of the Sun. The main scientific task of SCXM would be the mapping of the coronal X-ray emission, i.e. to resolve the radial distribution of the X-ray surface brightness around the Sun. These kind of off-limb observations would help to interpret the coronal plasma diagnostics as a function of the elongation angle. Direct solar full disc observations could be also performed with SCXM. In this work we have applied real solar coronal X-ray data obtained by the SMART-1 XSM (X-ray Solar Monitor) to simulate on-solar observations at different flux levels to derive full disc sensitivity and performance of SCXM. A challenging attempt for SCXM would also be to distinguish the X-ray spectrum of the decaying axions around the Sun. These axions are assumed to be created as side products of fusion reactions in the core of the Sun. These axions are predicted to be gravitationally trapped to orbit the Sun forming a halo-like X-ray emitting object. No signature of an axion X-ray emission around the Sun has been observed to this day. This simple X-ray spectrometer with an optical concentrator would be an inexpensive instrument with low mass and telemetry budgets compared with more accurate X-ray instruments of imaging capability. Hence SCXM would be an advanced choice as an auxiliary instrument for solar coronal X-ray observations.
Parabolic John-Nirenberg Spaces
Lauri Berkovits
Journal of Function Spaces and Applications , 2012, DOI: 10.1155/2012/901917
Abstract: We introduce a parabolic version of John-Nirenberg space with exponent p and show that it is contained in local weak- spaces.
Lauri Honko
M?etagused. Hüperajakiri , 1998,
Abstract: The Folklore Process. The theoretical article by L. Honko follows the changing of the notion "folklore". A thorough change have undergone attitude towards the informant, creator, needer and performer of traditions. Instead of people, there are social groups that can be defined by their social status, profession, ethnical background, religion, place of living and whatever other criteria and what makes it possible to speak about a circle of members. L. Honko treats the basic new definitions of folklore and divides the folklore process into 22 stages, the 12 first of which are part of folklore's "first life" or take place on the basis of those criteria being filled, the rest 10 stages are folklore's "second life .
Triratna Budistlik Kogukond: juhtumiuuring budistlikust kogudusest Eestis
Lauri Liiders
M?etagused. Hüperajakiri , 2013, DOI: 10.7592/mt2013.53.liiders
Abstract: This paper provides an overview of the first detailed case study of a Buddhist congregation in Estonia. The object of this study is Triratna Buddhist Community in Estonia, which was established here in 1989 and is part of international Triratna Buddhist Community (formerly known as Friends of the Western Buddhist Order) created in the United Kingdom in 1967. Mainly through oral history and participant observation methods as well as analysis of data presented by different written and oral sources the researcher strives to give an overview of various aspects of activity connected with one particular Buddhist group in Estonia, including its practice, ordination rituals, beliefs and membership characteristics. It also includes a detailed overview of the congregation’s history and its relationship with members of Triratna congregations in Finland and the UK. It presents Buddhism as an emerging new religion in Estonia through a case study of a Western Buddhist ecumenical congregation.
Stuck in the Funicular: the Deceptive Levity of Translating Poetic Stoppages of Imagery
Lauri Pilter
Interlitteraria , 2013, DOI: 10.12697/il.2012.17.23
Abstract: -
Finnish Chironomidae
Lauri Paasivirta
Chironomus Newsletter on Chironomidae Research , 2012,
The "human" statistics of terrestrial impact cratering rate
Lauri Jetsu
Physics , 1997,
Abstract: The most significant periodicities in the terrestrial impact crater record are due to the human-signal: the bias of assigning integer values for the crater ages. This bias seems to have eluded the proponents and opponents of real periodicity in the occurrence of these events, as well as the theorists searching for an extraterrestrial explanation for such periodicity. The human-signal should be seriously considered by scientists in astronomy, geology and paleontology when searching for a connection between terrestrial major comet or asteroid impacts and mass extinctions of species.
Solving an inverse problem for the wave equation by using a minimization algorithm and time-reversed measurements
Lauri Oksanen
Mathematics , 2011,
Abstract: We consider the inverse problem for the wave equation on a compact Riemannian manifold or on a bounded domain of $\R^n$, and generalize the concept of {\em domain of influence}. We present an efficient minimization algorithm to compute the volume of a domain of influence using boundary measurements and time-reversed boundary measurements. Moreover, we show that if the manifold is simple, then the volumes of the domains of influence determine the manifold. For a continuous real valued function $\tau$ on the boundary of the manifold, the domain of influence is the set of those points on the manifold from which the travel time to some boundary point $y$ is less than $\tau(y)$.
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