3,276 research outputs found
Role of the meson in photoproduction off the deuteron
Neutral kaon photoproduction off the nucleon and deuteron has been
reinvestigated by utilizing the new experimental data on both targets. An
isobar model for elementary operator and impulse approximation for the reaction
on the deuteron have been used. The available free parameters in the elementary
model have been extracted from both elementary and deuteron data. In contrast
to the elementary reaction, fitting the deuteron data requires an inclusion of
weighting factor. The result indicates that the angular distribution of the
elementary process does not show backward peaking behavior.Comment: 4 pages, 4 figures, prepared for the Fifth Asia-Pacific Conference on
Few-Body Problems in Physics 2011 (APFB2011), Seoul, Korea, August 22-26,
201
Neutral kaon photoproduction on the deuteron
Neutral kaon photoproduction on the deuteron has been investigated by
including the final state effects and compared with the experimental data.
Comparison shows that the models used in this calculation can reproduce the
data in the channel regions fairly well but still give over
predictions in the channel. It seems that the tensor target
asymmetries are more suitable for studying the final state effects. The
extractions of the elementary photoproduction amplitude are also demonstrated.Comment: 6 pages, 6 figures, talk given by A. Salam at Fourth Asia-Pacific
Conference on Few-Body Problems in Physics 2008 (APFB08), Depok, Indonesia,
August 19-23, 200
User Interface and Interaction Design Considerations for Collaborative Learning Using Augmented Reality Learning Object
Abstract. Most education is too often about teaching and not enough about learning. It is because students are forced to take whatever it is given to them without considering what they think about it, in other words, they passively take the given knowledge. This paper presents early investigation about interface and interaction design considerations for effective collaborative learning by taking account individual learning preferences and collaborative learning
characteristics of engineering students. In our investigation, we follow Felder Silverman Learning Style Model and conducted a test measured using Index Learning Style. As a result, we discovered that engineering students tend to be active, sensory, visual, and sequential. Therefore, we implement augmented reality views to satisfy students’ learning preferences toward content presentation (visual learner). It is also because augmented reality can give rich information toward real objects/environment. For collaborative characteristics, we studied past research on collaborative learning regarding its characteristics that affects learning effectiveness. Besides, our proposed design also considered the user interface principle which provides a guidance to effectively implement our consideration into an interface
Evaluating capacity development for participatory forest management in Bangladesh's Sal forests based on '4Rs' stakeholder analysis
ArticleForest Policy and Economics.8(8): 785-796 (2006)journal articl
External Inversion, Internal Inversion, and Reflection Invariance
Having in mind that physical systems have different levels of structure we
develop the concept of external, internal and total improper Lorentz
transformation (space inversion and time reversal). A particle obtained from
the ordinary one by the application of internal space inversion or time
reversal is generally a different particle. From this point of view the
intrinsic parity of a nuclear particle (`elementary particle') is in fact the
external intrinsic parity, if we take into account the internal structure of a
particle. We show that non-conservation of the external parity does not
necessarily imply non-invariance of nature under space inversion. The
conventional theory of beta-decay can be corrected by including the internal
degrees of freedom to become invariant under total space inversion, though not
under the external one.Comment: 15 pages. An early proposal of "mirror matter", published in 1974.
This is an exact copy of the published paper. I am posting it here because of
the increasing interest in the "exact parity models" and its experimental
consequence
Community forest management in Thailand: current situation and dynamics in the context of sustainable development
The original publication is available at www.springerlink.comArticleNew Forests. 31(2): 273-291 (2006)journal articl
Dualisation of the Salam-Sezgin D=8 Supergravity
The first-order formulation of the Salam-Sezgin D=8 supergravity coupled to N
vector multiplets is discussed. The non-linear realization of the bosonic
sector of the D=8 matter coupled Salam-Sezgin supergravity is introduced by the
dualisation of the fields and by constructing the Lie superalgebra of the
symmetry group of the doubled field strength.Comment: 15 page
Factors influencing the sustained participation of farmers in participatory forestry: a case study in central Sal forests in Bangladesh
ArticleJournal of Environmental Management. 74(1): 43-51 (2005)journal articl
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