When movement invites to experience : a Kansei design exploration on senses’ qualities

In this paper, we introduce a Research through Design on ‘Sensual Dynamics’, and explore four design projects (namely Be Touched!, Sound Flowers, Shylight, and Blow!) from which we extract design notions providing valuable insights on how to design with and for the senses’ quality ‘reciprocity’. ‘Sensual Dynamics’ designs are artifacts that are able to sense one person and to behave upon her presnece to invite for movements enhancing the perceptive experience. Such an artifact is therefore at the same time the object of the experience as well as the trigger for a greater perceptive experience

Network Economics and the Digital Divide in Rural South Asia

The concept of a 'global digital divide' is now common, and many cross-country studies of determinants of differences in computer and Internet penetration have been performed. The main conclusions and policy implications from these studies are relatively blunt: get richer, have more telephones, and regulate telecommunications better. In this paper, we examine an alternative approach to bridging the digital divide, through organizational innovations that provide low cost Internet access in developing countries, within the existing conditions of income levels, telecommunications infrastructure and regulatory environment. We use survey data from 500 individuals in three South Asian countries, Bangladesh, Nepal and Sri Lanka, to examine factors influencing patterns of computer and Internet use. These individuals were in situations where computer and Internet access has been provided by a developmental agency (government or non-government). We estimate logit and multinomial logit models, using explanatory variables such as income, household size, education, and occupation, as well as infrastructure factors such as quality of electricity supply, and availability of telephones and televisions. Thus we are able to go beyond simple analyses of penetration at the country level, to understand the microeconomics of computer and Internet use in rural South Asia

Network Economics and the Digital Divide in Rural India

The idea of a 'global digital divide' is well accepted, and cross-country studies of determinants of differences in computer and Internet penetration have identified income, telecommunications infrastructure, and regulatory quality as key influencing factors. The policy implications from these studies are relatively blunt: get richer, have more telephones, and regulate telecommunications better. In this paper, we examine an alternative policy approach to bridging the digital divide, through organizational innovations that provide low cost Internet access in developing countries, within the existing levels of income, telecommunications infrastructure and regulatory environment. We use survey data from 500 individuals in four states of India: Haryana, Madhya Pradesh, Punjab and Rajasthan, to examine factors influencing patterns of computer and Internet use. The situations in which data was collected were ones where computer and Internet access was being provided by a developmental agency (government or non-government). We estimate logit and multinomial logit models, using explanatory variables such as income, household size, education, and occupation, as well as infrastructure factors such as quality of electricity supply, and availability of telephones and televisions. Thus we are able to go beyond simple analyses of penetration at the country level, to understand the microeconomics of computer and Internet use in rural India. In particular, by examining patterns of use, we are able to comment on the importance of network externalities for diffusion of computers and the Internet in these local rural contexts

Two-Photon Doppler cooling of alkaline-earth-metal and ytterbium atoms

A new possibility of laser cooling of alkaline-earth-metal and Ytterbium atoms using a two-photon transition is analyzed. We consider a $^{1}S_{0}$ - $^{1}S_{0}$ transition, with excitation in near resonance with the $^{1}P_{1}$ level. This greatly increases the two-photon transition rate, allowing an effective transfer of momentum. The experimental implementation of this technique is discussed and we show that for Calcium, for example, two-photon cooling can be used to achieve a Doppler limit of 123 microKelvin. The efficiency of this cooling scheme and the main loss mechanisms are analyzed.Comment: 7 pages, 5 figure

The Cold Spot as a Large Void: Lensing Effect on CMB Two and Three Point Correlation Functions

The "Cold Spot" in the CMB sky could be due to the presence of an anomalous huge spherical underdense region - a "Void" - of a few hundreds Mpc/h radius. Such a structure would have an impact on the CMB two-point (power spectrum) and three-point (bispectrum) correlation functions not only at low-l, but also at high-l through Lensing, which is a unique signature of a Void. Modeling such an underdensity with an LTB metric, we show that for the power spectrum the effect should be visible already in the WMAP data only if the Void radius is at least L \gtrsim 1 Gpc/h, while it will be visible by the Planck satellite if L \gtrsim 500 Mpc/h. We also speculate that this could be linked to the high-l detection of an hemispherical power asymmetry in the sky. Moreover, there should be non-zero correlations in the non-diagonal two-point function. For the bispectrum, the effect becomes important for squeezed triangles with two very high l's: this signal can be detected by Planck if the Void radius is at least L \gtrsim 300 Mpc/h, while higher resolution experiments should be able to probe the entire parameter space. We have also estimated the contamination of the primordial non-Gaussianity f_NL due to this signal, which turns out to be negligible.Comment: v1: 18 pages, 12 figures; v2: 19 pages, 12 figures, calculation of bispectrum improved, reference added, published version; v3: 19 pages, 12 figures, refined eq.(9) and related figures, conclusions strengthene

Functional bold MRI: advantages of the 3 T vs. the 1.5 T

We quantitatively evaluate the benefits of a higher field strength for functional brain MRI (fMRI) based on the blood oxygenation level-dependent contrast. The 3-T fMRI shows a higher sensitivity for the motor and somatosensory stimulation and more specific localization in the grey substance. The 3-T fMRI detects additional areas of activation with the motor paradigm

Grain Surface Models and Data for Astrochemistry

AbstractThe cross-disciplinary field of astrochemistry exists to understand the formation, destruction, and survival of molecules in astrophysical environments. Molecules in space are synthesized via a large variety of gas-phase reactions, and reactions on dust-grain surfaces, where the surface acts as a catalyst. A broad consensus has been reached in the astrochemistry community on how to suitably treat gas-phase processes in models, and also on how to present the necessary reaction data in databases; however, no such consensus has yet been reached for grain-surface processes. A team of ∼25 experts covering observational, laboratory and theoretical (astro)chemistry met in summer of 2014 at the Lorentz Center in Leiden with the aim to provide solutions for this problem and to review the current state-of-the-art of grain surface models, both in terms of technical implementation into models as well as the most up-to-date information available from experiments and chemical computations. This review builds on the results of this workshop and gives an outlook for future directions

Measurement of the photon+b+b-jet production differential cross section in ppˉp\bar{p} collisions at \sqrt{s}=1.96~\TeV

We present measurements of the differential cross section dsigma/dpT_gamma for the inclusive production of a photon in association with a b-quark jet for photons with rapidities |y_gamma|< 1.0 and 30<pT_gamma <300 GeV, as well as for photons with 1.5<|y_gamma|< 2.5 and 30< pT_gamma <200 GeV, where pT_gamma is the photon transverse momentum. The b-quark jets are required to have pT>15 GeV and rapidity |y_jet| < 1.5. The results are based on data corresponding to an integrated luminosity of 8.7 fb^-1, recorded with the D0 detector at the Fermilab Tevatron $p\bar{p}$ Collider at sqrt(s)=1.96 TeV. The measured cross sections are compared with next-to-leading order perturbative QCD calculations using different sets of parton distribution functions as well as to predictions based on the kT-factorization QCD approach, and those from the Sherpa and Pythia Monte Carlo event generators.Comment: 10 pages, 9 figures, submitted to Phys. Lett.

Search for Higgs bosons decaying to tautau pairs in ppbar collisions at sqrt(s) = 1.96 TeV

We present a search for the production of neutral Higgs bosons decaying into tautau pairs in ppbar collisions at a center-of-mass energy of 1.96 TeV. The data, corresponding to an integrated luminosity of 5.4 fb-1, were collected by the D0 experiment at the Fermilab Tevatron Collider. We set upper limits at the 95% C.L. on the product of production cross section and branching ratio for a scalar resonance decaying into tautau pairs, and we then interpret these limits as limits on the production of Higgs bosons in the minimal supersymmetric standard model (MSSM) and as constraints in the MSSM parameter space.Comment: 7 pages, 5 figures, submitted to PL

Limits on anomalous trilinear gauge boson couplings from WW, WZ and Wgamma production in pp-bar collisions at sqrt{s}=1.96 TeV

We present final searches of the anomalous gammaWW and ZWW trilinear gauge boson couplings from WW and WZ production using lepton plus dijet final states and a combination with results from Wgamma, WW, and WZ production with leptonic final states. The analyzed data correspond to up to 8.6/fb of integrated luminosity collected by the D0 detector in pp-bar collisions at sqrt{s}=1.96 TeV. We set the most stringent limits at a hadron collider to date assuming two different relations between the anomalous coupling parameters Delta\kappa_\gamma, lambda, and Delta g_1^Z for a cutoff energy scale Lambda=2 TeV. The combined 68% C.L. limits are -0.057<Delta\kappa_\gamma<0.154, -0.015<lambda<0.028, and -0.008<Delta g_1^Z<0.054 for the LEP parameterization, and -0.007<Delta\kappa<0.081 and -0.017<lambda<0.028 for the equal couplings parameterization. We also present the most stringent limits of the W boson magnetic dipole and electric quadrupole moments.Comment: 10 pages, 5 figures, submitted to PL