There is a great deal of evidence that method bias is really sure influences item validities, measurement error, correlation and covariance between latent constructs and thus leading the researchers to erroneous conclusion due to inflation or deflation during hypothesis testing. To remedy this, the study provides a guideline to minimize the method bias in the context of structural equation modeling employing the covariance method (CB-SEM) using medical tourism model. A practical approach is illustrated for the identification of method bias based (...) on the new construct namely common latent factor. Using this latent construct, we managed to identify which item has potential to permeate more variance from common latent factor. Nevertheless, we figure out that the method bias is do not exist in our developed model. Therefore, this measurement model is appropriate for structural model in order to achieve the research hypotheses. We hope that this discussion will help the researchers anticipate which items are likely exposed on method bias before proceed to advance modeling. (shrink)

One of the studies in the physics education curriculum at the undergraduate level is the philosophy of science (POS). This study aims to analyse the university students' understanding of the concept of epistemology, ontology, and axiology. As the situation of COVID-19 pandemic, an online survey design was utilised in this research. The participants included 89 students who were majoring in Physics Education at a public university in Surabaya Indonesia. In the duration of the Spring Semester 2020, the research was conducted (...) by giving an online test containing statements with a value range of one to ten and a questionnaire with one to five Likert scale. The data obtained were then analysed using quantitative descriptive analysis techniques and an exploratory factor analysis (EFA) to achieve the results of the students' perception of the philosophy of science. The findings indicated it was about 22% of the total participants had a lack of understanding of epistemological studies. Meanwhile, a total of 14.3% of them had a lack of understanding of the concept of ontology. The best result was the understanding of the concept of axiology, the physics education students achieved 91.2% in a good level. Turning to the result of EFA, it stated all items developed to measure the factor behind the structure scale with loading factor more than 0.4 with the overall reliability of more than .80. These findings provide an additional treasure of previous knowledge that rarely explores the concept of epistemology, ontology, and axiology in a specific manner. (shrink)

In this paper we argue that the current paradigm for AGN and quasars is essentially incomplete and a rivision is needed. Remind that the current paradigm for AGN and quasars is that their radio emission is explained by synchrotron radiation from relativistic electrons that are Doppler boosted through bulk motion. In this model, the intrinsic brightness temperatures cannot exceed 1011 to 1012 K. Typical Doppler boosting is expected to be able to raise this temperature by a factor of 10. The (...) observed brightness temperature of the most compact structures in BL Lac, constrained by baselines longer than 5.3Gλ, must indeed exceed 2×1013K and can reach as high as ˜ 3 × 1014K. This is difficult to reconcile with current incoherent synchrotron emission models from relativistic electrons, requiring alternative models such as emission from relativistic protons. However the proton, as we know, is 1836 times heavier than an electron and absolutely huge energy is required to accelerated it to sublight speed. These alternative models such as emission from relativistic protons can be suported by semiclassical gravity effect finds its roots in the singular behavior of quantum fields on curved distributional space- times presented by rotating gravitational singularities. (shrink)