Teachers’ Practices in Curriculum and Instruction in a Science High School Amidst the Covid-19 Pandemic

The disruptions caused by the Covid-19 Pandemic do not excuse science schools from continuing to provide holistic quality education to their learners. This study determined teachers\u27 practices in the Curriculum and instruction as part of School-Based Management Level-3 of a public science high school. The descriptive-correlation quantitative research design and data triangulation were employed. The teachers were on average age of 32.90 years, 75% of the respondents were female, the average years in service of the teachers is eight years, and the majority are Teachers I-III, about 93.8% of the respondents. About 18.8% of the respondents were full-fledged in their Master\u27s Program. Results of the study showed that teachers\u27 overall level of practice in Curriculum and instruction was denoted as highly practiced. Correlational analyses revealed a significant relationship between the highest educational attainment and general practices of teachers in Curriculum and instructions (r=0.478,p=0.002<0.05). A significant relationship between the provision for the development needs of learners and the Review, improvement, and contextualization of assessment tools for teaching and learning as teachers\u27 practices in the Curriculum and Instruction was also presented (r=0.449,p=0.010<0.05). A significant relationship between the regular collaboration of the learning system and the Review, improvement, and contextualization of assessment tools for teaching and learning (r=0.430,p=0.014< 0.05) was also significant

Dissipative Effects on Quantum Sticking

Using variational mean-field theory, many-body dissipative effects on the threshold law for quantum sticking and reflection of neutral and charged particles are examined. For the case of an ohmic bosonic bath, we study the effects of the infrared divergence on the probability of sticking and obtain a non-perturbative expression for the sticking rate. We find that for weak dissipative coupling $\alpha$, the low energy threshold laws for quantum sticking are modified by an infrared singularity in the bath. The sticking probability for a neutral particle with incident energy $E\to 0$ behaves asymptotically as ${\it s}\sim E^{(1+\alpha)/2(1-\alpha)}$; for a charged particle, we obtain ${\it s}\sim E^{\alpha/2(1-\alpha)}$. Thus, "quantum mirrors" --surfaces that become perfectly reflective to particles with incident energies asymptotically approaching zero-- can also exist for charged particles.Comment: 10 pages, 0 fig

Kaon Condensation in a Nambu--Jona-Lasinio (NJL) Model at High Density

We demonstrate a fully self-consistent microscopic realization of a kaon-condensed colour-flavour locked state (CFLK0) within the context of a mean-field NJL model at high density. The properties of this state are shown to be consistent with the QCD low-energy effective theory once the proper gauge neutrality conditions are satisfied, and a simple matching procedure is used to compute the pion decay constant, which agrees with the perturbative QCD result. The NJL model is used to compare the energies of the CFLK0 state to the parity even CFL state, and to determine locations of the metal/insulator transition to a phase with gapless fermionic excitations in the presence of a non-zero hypercharge chemical potential and a non-zero strange quark mass. The transition points are compared with results derived previously via effective theories and with partially self-consistent NJL calculations. We find that the qualitative physics does not change, but that the transitions are slightly lower.Comment: 21 pages, ReVTeX4. Clarified discussion and minor change

Variation in _PNPLA3_ is associated with outcomes in alcoholic liver disease

Two recent genome-wide association studies have described associations of SNP variants in _PNPLA3_ with nonalcoholic fatty liver and plasma liver enzyme levels in population based cohorts. We investigated the contributions of these variants to clinical outcomes in Mestizo subjects with a history of excessive alcohol consumption. We show that non-synonymous variant rs738409[G] (I148M) in _PNPLA3_ is strongly associated with alcoholic liver disease and progression to alcoholic cirrhosis (unadjusted OR = 2.25, P = 1.7x10^-10^; ancestry-adjusted OR = 1.79, P = 1.9x10^-5^)

Cold atom gravimetry with a Bose-Einstein Condensate

We present a cold atom gravimeter operating with a sample of Bose-condensed Rubidium-87 atoms. Using a Mach-Zehnder configuration with the two arms separated by a two-photon Bragg transition, we observe interference fringes with a visibility of 83% at T=3 ms. We exploit large momentum transfer (LMT) beam splitting to increase the enclosed space-time area of the interferometer using higher-order Bragg transitions and Bloch oscillations. We also compare fringes from condensed and thermal sources, and observe a reduced visibility of 58% for the thermal source. We suspect the loss in visibility is caused partly by wavefront aberrations, to which the thermal source is more susceptible due to its larger transverse momentum spread. Finally, we discuss briefly the potential advantages of using a coherent atomic source for LMT, and present a simple mean-field model to demonstrate that with currently available experimental parameters, interaction-induced dephasing will not limit the sensitivity of inertial measurements using freely-falling, coherent atomic sources.Comment: 6 pages, 4 figures. Final version, published PR

Helicopter transmission research at NASA Lewis Research Center

A joint helicopter transmission research program between NASA Lewis Research Center and the U.S. Army Aviation Systems Command has existed since 1970. Program goals are to reduce weight and noise and to increase life and reliability. Reviewed are significant advances in technology for gears and transmissions and the experimental facilities at NASA Lewis for helicopter transmission testing are described. A description of each of the rigs is presented along with some significant results from the experiments

Sliding Density-Wave in Sr_{14}Cu_{24}O_{41} Ladder Compounds

We used transport and Raman scattering measurements to identify the insulating state of self-doped spin 1/2 two-leg ladders of Sr_{14}Cu_{24}O_{41} as a weakly pinned, sliding density wave with non-linear conductivity and a giant dielectric response that persists to remarkably high temperatures

Grade 10 Students’ Online Learning Readiness and e-Learning Engagement in a Science High School during Pandemic

Every area of the government faced enormous hurdles as a result of the COVID-19 outbreak. For the Department of Education, this meant using a different teaching modality to continue the students\u27 education. Online learning, where students and teachers interact virtually and use Google Classroom as the learning management system (LMS), is one of the learning modes used during the pandemic. This study examined how prepared Grade 10 students of Puerto Princesa City National Science High School were for online learning and how engaged they were in it throughout the pandemic. According to the study\u27s findings, the majority of students are prepared for online learning in terms of expectations, preferred methods of learning, and technological aptitude. On the other side, students must develop their capacity for initiative in their own learning and be provided with the necessary hardware and software to support their studies. Additionally, the students\u27 grades indicate proficient to advanced level of e-learning engagement. Results also showed that there is no significant relationship between students’ online learning readiness and students\u27 e-learning engagement in science subject during the pandemic. This implies that regardless of their readiness in online learning, students are capable of handling their tasks and get high grade