Guided inquiry model assisted HOTS-Based Worksheet for critical thinking ability in online learning during pandemic covid-19

The 21st century education requires students to have critical thinking skills. This research aim was to analyze the influence of the guided inquiry learning model assisted by student worksheets based on Higher Order Thinking Skills (HOTS) on students' critical thinking skills during online learning at Senior High School 1 Gadingrejo class XI Science Major. This research uses a quasi-experimental design with a pretest-posttest non-equivalent control group design. The samples in this study were students of Natural Science Major class, XI Science Major 2 as the control class, and XI Science Major 7 as the experimental class which was selected through purposive sampling technique. The research data consist of quantitative and qualitative. Quantitative data in the form of the average score of pretest, posttest, and N-Gain as a result of critical thinking skills were analyzed by independent sample t-test (α=0.05) using SPSS 25.0 For Windows. The results showed that there was a significant effect of application of the HOTS-based guided inquiry learning model on students' critical thinking skills during online learning (Sig. 0.010 < 0.05). The experimental class N-gain value of 0.65 is classified as medium category. Qualitative data in the form of a questionnaire on the implementation of online learning with an average percentage result of 64.2% which is included in the strong category. A total of 92% of students agree that the difficult questions in the HOTS-based worksheets help improve critical thinking skills. Therefore, the guided inquiry learning model assisted by HOTS-based worksheet student has an effect on students' critical thinking skills during online learning

Structural and electronic characterization of (2,3(3)) bar-shaped stacking fault in 4H-SiC epitaxial layers

Crystallographic, electronic, and energetic analyses of the (2, 3_3) [or (2, 3, 3, 3) in the standard Zhadanov notation] bar-shaped stacking fault, observed in as-grown 4H-SiC epitaxial layers, are presented. The defect has been identified by means of spatially resolved microphotoluminescence (μ-PL) measurements at different emission wavelengths, focusing on the emission peak at 0.3 eV below the conduction band. Low temperature μ-PL measurements have also been performed. The defect has been identified and characterized using high resolution transmission electron microscopy. Experimental results are correlated and validated by the calculations of the Kohn–Sham electronic band structure and the defect formation energy

Testbeam and Laboratory Characterization of CMS 3D Pixel Sensors

The pixel detector is the innermost tracking device in CMS, reconstructing interaction vertices and charged particle trajectories. The sensors located in the innermost layers of the pixel detector must be upgraded for the ten-fold increase in luminosity expected with the High- Luminosity LHC (HL-LHC) phase. As a possible replacement for planar sensors, 3D silicon technology is under consideration due to its good performance after high radiation fluence. In this paper, we report on pre- and post- irradiation measurements for CMS 3D pixel sensors with different electrode configurations. The effects of irradiation on electrical properties, charge collection efficiency, and position resolution of 3D sensors are discussed. Measurements of various test structures for monitoring the fabrication process and studying the bulk and surface properties, such as MOS capacitors, planar and gate-controlled diodes are also presented.Comment: 14 page

Observation of the TeV gamma-ray source MGRO J1908+06 with ARGO-YBJ

The extended gamma ray source MGRO J1908+06, discovered by the Milagro air shower detector in 2007, has been observed for about 4 years by the ARGO-YBJ experiment at TeV energies, with a statistical significance of 6.2 standard deviations. The peak of the signal is found at a position consistent with the pulsar PSR J1907+0602. Parametrizing the source shape with a two-dimensional Gauss function we estimate an extension \sigma = 0.49 \pm 0.22 degrees, consistent with a previous measurement by the Cherenkov Array H.E.S.S.. The observed energy spectrum is dN/dE = 6.1 \pm 1.4 \times 10^-13 (E/4 TeV)^{-2.54 \pm 0.36} photons cm^-2 s^-1 TeV^-1, in the energy range 1-20 TeV. The measured gamma ray flux is consistent with the results of the Milagro detector, but is 2-3 times larger than the flux previously derived by H.E.S.S. at energies of a few TeV. The continuity of the Milagro and ARGO-YBJ observations and the stable excess rate observed by ARGO-YBJ along 4 years of data taking support the identification of MGRO J1908+06 as the steady powerful TeV pulsar wind nebula of PSR J1907+0602, with an integrated luminosity above 1 TeV about 1.8 times the Crab Nebula luminosity.Comment: 6 pages, accepted for pubblication by ApJ. Replaced to correct the author lis