The q-matrix method, a new method for data mining and knowledge discovery, is compared with factor analysis and cluster analysis in analyzing fourteen experimental data sets. This method creates a matrix-based model that extracts latent relationships among observed binary variables. Results show that the q-matrix method offers several advantages over factor analysis and cluster analysis for kno...

The predictor-corrector method for following a reduced gradient (RGF) to determine saddle points [Quapp, W. et al., J Comput Chem 1998, 19, 1087] is further accelerated by a modification allowing an implied corrector step per predictor but almost without additional costs. The stability and robustness of the RGF method are improved, and the new version in addition reduces the number of gradient ...

Increasing the quality factor (Q-factor) of an optical resonator device has been a research focus utilized in various applications. Higher Q-factor means light is confined longer time which will produce sharper peak and higher transmission. In this paper, we introduce novel technique to further increase one-dimensional photonic crystal (1D PhC) cavity by using end loop-mirror (ELM). The utilize...

We report on the design, analytical modeling, numerical simulation, fabrication, and experimental characterization of chip-scale microwave resonators that exhibit high quality-factors (Q-factors) in the microwave frequency range. We demonstrate high Q-factors by tuning these microwave resonators with the film capacitance of their LC tank circuits rather than the conventional approach of using e...

Terahertz (THz) technology is rapidly evolving, and the advancement of data information processing devices essential. Silicon THz microresonators provide perfect platforms to develop compact integrated that could transform technology. Here we present a systematic study on key figure merit silicon disc - quality factor (Q-factor) in dependence substrate’s resistivity. Our results show Q-factor d...

Using new experimental data on the leptonic mass spectrum of B → πlν, we simultaneously determine |Vub| and constrain a π 2 and a π 4 , the first two Gegenbauer moments of the pion’s leading-twist distribution amplitude. We find |Vub| = (3.2 ± 0.1 ± 0.1 ± 0.3) × 10 , where the first error is experimental, the second comes from the shape of the form factor in q and the third is a 8% uncertainty ...

This article presents the results of a study exploring travellers’ preferences for middle-distance travel using Q-methodology. Respondents rank-ordered 42 opinion statements regarding travel choice and motivations for travel in general and for car and public transport as alternative travel modes. By-person factor analysis revealed four distinct preference segments for middle-distance travel: (1...

—Researchers have used various qualitative and quantitative methods to deal with subjectivity in studying people’s recreation experiences. Q methodology has been the most eff ective approach for analyzing both qualitative and quantitative aspects of experience, including attitudes or perceptions. Th e method is composed of two main components—Q sorting and Q factor analysis—and allows for the s...

In the paper the question is a q-Fourier transform of a q-Gaussian a q ′ -Gaussian (with some q ′ ) up to a constant factor is analyzed for the whole range of q ∈ (−∞, 3). This question is connected with applicability of Fq-transform in the study of limit processes in nonextensive statistical mechanics. We derive some functional-differential equations for the q-Fourier transform of q-Gaussians....

Q-methodology was introduced more than 80 years ago to study subjective topics such as attitudes, perceptions, preferences, and feelings and there has not been much change in its statistical components since then. In Q-methodology, subjective topics are studied using a combination of qualitative and quantitative techniques. It involves development of a sample of statements and rank-ordering the...