Model Pembelajaran Remap CS (Reading Concept Map Cooperative Script) untuk Pemberdayaan Keterampilan Berpikir Kritis Siswa

Critical thinking skills is a skills that need to be empowered in the face of life in the 21st century. Critical thinking skills are skills to think reflectively and reasonable to decide what is believed. Critical thinking skills can be empowered toward learning activities. One of the learning activities that can empower critical thinking skills is Remap CS (Reading Concept Map Cooperative Script) that used in biology lesson. Remap CS learning model has a syntax that can empower critical thinking skills. The purpose of this study is to empower students's critical thinking skills in biology matter by using Remap CS learning model. This type of research is quasi experimental with nonequivalent pretest-posttest control group design. The study was conducted in science class of X4 and X1 SMA Negeri 1 Batu. Data obtained from the critical thinking skills test results were analyzed using the description rubric developed by Zubaidah, et al. (2015). The test results analyzed with Anacova and further by using LSD. The results showed that Remap CS learning model can empower students's critical thinking skills in the subject of biology

Pemberdayaan Keterampilan Metakognitif dan Hasil Belajar Kognitif melalui Pembelajaran Biologi Berbasis Reading-concept Map-cooperative Script (Remap-cs)

The aims of this study are to explore the effect of Reading-Concept Map- Cooperative Script (Remap-CS) towards metacognitive skills and cognitive learning outcomes on highschool students. This research used Nonequivalent Pretest-Posttest Control Group Design. Metacognitive skills obtained from the essay test that is integrated with the cognitive achievement test. The test results were then analyzed with Anacova. The results of this experiment showed that Remap-CS can enhance metacognitive skill and cognitive learning outcomes.Penelitian ini bertujuan untuk mengetahui pengaruh pembelajaran Reading-Concept Map-Cooperative Script (Remap-CS) terhadap keterampilan metakognitif dan hasil belajar kognitif siswa. Rancangan penelitian yang digunakan adalah nonequivalent pretest-posttest control group design. Data keterampilan metakognitif diperoleh dari hasil tes essay yang terintegrasi dengan tes hasil belajar kognitif. Hasil tes selanjutnya dianalisis dengan teknik Anacova. Hasil penelitian menunjukkan bahwa Remap-CS berpengaruh terhadap keterampilan metakognitif dan hasil belajar kognitif siswa

Molecular detection of vector-borne bacterial pathogens in dromedary camels from Algeria

Background: In Algeria, little focus was placed on camels as hosts of tick-borne bacterial diseases. Recent studies showed a high prevalence of tick infestation in dromedaries. Transmission of various pathogenic micro organisms to camels by ticks imposes considerable economic losses to livestock and greatly impact on human and animal health. The aim of our study was to investigate the occurrence of vector-borne zoonotic bacteria in camels from Algeria. Methodology: Blood samples were collected from 80 randomly selected camels in Laghouat province, southern Algeria. The samples were screened for Anaplasma spp, Bartonella spp, Rickettsia spp and Coxiella burnetii by qPCR. All positive samples were confirmed by standard PCR followed by sequencing. Data on age, sex, tick infestation and location of the camels were analyzed using the SPSS version 17.0 and association of these with vector-borne bacterial pathogens was determined using Chi-square (χ2) test. P value lower than 0.05 wasconsidered as indicative of significance. Results: Twenty five of the 80 (31.3%) camels were positive to at least one vector-borne bacterial pathogen with Anaplasma phagocytophilum (22.5%, 18/80) being the most prevalent species, followed by Anaplasma platys (7.5%, 6/80) and Bartonella dromedarii (2.5%, 2/80). Only one camel was co-infected with two pathogens. All samples tested negative for Rickettsia spp and Coxiella burnetii. None of the factors (age, sex, tick infestation and study sites) was significantly associated with prevalence of vector-borne bacteria in the camels (p>0.05). Conclusion: The present study is the first report of anaplasmosis and bartonellosis in "Camelus dromedaries" from Algeria. Our results highlighted the need for further investigations on tickborne pathogens of camels

Maximally localized Wannier functions in LaMnO3 within PBE+U, hybrid functionals, and partially self-consistent GW: an efficient route to construct ab-initio tight-binding parameters for e_g perovskites

Using the newly developed VASP2WANNIER90 interface we have constructed maximally localized Wannier functions (MLWFs) for the e_g states of the prototypical Jahn-Teller magnetic perovskite LaMnO3 at different levels of approximation for the exchange-correlation kernel. These include conventional density functional theory (DFT) with and without additional on-site Hubbard U term, hybrid-DFT, and partially self-consistent GW. By suitably mapping the MLWFs onto an effective e_g tight-binding (TB) Hamiltonian we have computed a complete set of TB parameters which should serve as guidance for more elaborate treatments of correlation effects in effective Hamiltonian-based approaches. The method-dependent changes of the calculated TB parameters and their interplay with the electron-electron (el-el) interaction term are discussed and interpreted. We discuss two alternative model parameterizations: one in which the effects of the el-el interaction are implicitly incorporated in the otherwise "noninteracting" TB parameters, and a second where we include an explicit mean-field el-el interaction term in the TB Hamiltonian. Both models yield a set of tabulated TB parameters which provide the band dispersion in excellent agreement with the underlying ab initio and MLWF bands.Comment: 30 pages, 7 figure

Suppressed Magnetization at the Surfaces and Interfaces of Ferromagnetic Metallic Manganites

What happens to ferromagnetism at the surfaces and interfaces of manganites? With the competition between charge, spin, and orbital degrees of freedom, it is not surprising that the surface behavior may be profoundly different than that of the bulk. Using a powerful combination of two surface probes, tunneling and polarized x-ray interactions, this paper reviews our work on the nature of the electronic and magnetic states at manganite surfaces and interfaces. The general observation is that ferromagnetism is not the lowest energy state at the surface or interface, which results in a suppression or even loss of ferromagnetic order at the surface. Two cases will be discussed ranging from the surface of the quasi-2D bilayer manganite (La$_{2-2x}$Sr$_{1+2x}$Mn$_2$O$_7$) to the 3D Perovskite (La$_{2/3}$Sr$_{1/3}$MnO$_3$)/SrTiO$_3$ interface. For the bilayer manganite, that is, ferromagnetic and conducting in the bulk, these probes present clear evidence for an intrinsic insulating non-ferromagnetic surface layer atop adjacent subsurface layers that display the full bulk magnetization. This abrupt intrinsic magnetic interface is attributed to the weak inter-bilayer coupling native to these quasi-two-dimensional materials. This is in marked contrast to the non-layered manganite system (La$_{2/3}$Sr$_{1/3}$MnO$_3$/SrTiO$_3$), whose magnetization near the interface is less than half the bulk value at low temperatures and decreases with increasing temperature at a faster rate than the bulk.Comment: 15 pages, 13 figure