Peningkatan Motivasi Belajar Siswa Melalui Contextual Teaching and Learning (CTL) pada Pembelajaran Perbandingan di SMP Free Methodist 1 Medan

Model pembelajaran yang dapat membantu siswa mengaitkan materi dengan kehidupan nyata. Model pembelajaran tersebut adalah Contextual Teaching and Learning (CTL) atau pembelajaran kontekstual Penelitian ini bertujuan untuk mengetahui apakah terdapat peningkatan motivasi belajar siswa melalui Contextual Teaching and Learning (CTL) pada pembelajaran perbandingan di SMP Free Methodist 1 Medan. Jenis penelitian ini merupakan penelitian tindakan kelas (PTK) yang terdiri dari dua siklus. Setiap siklus terdiri dari perencanaan, pelaksanaan, observasi dan refleksi. Subjek penelitian adalah siswa kelas VII-B SMP Free Methodist 1 Medan yang berjumlah 44 siswa. Objek penelitiannya adalah peningkatan motivasi belajar pada mata pelajaran perbandingan dengan menggunakan model Contextual Teaching and Learning (CTL). Tingkat motivasi siswa di peroleh dari angket yang di bagikan. Hasil menunjukan bahwa penerapan model Contextual Teaching and Learning (CTL) dapat meningkatkan motivasi belajar. Peningkatan motivasi belajar dari evaluasi Siklus I dan Siklus II dengan presentase Siklus I 62%, dan pada siklus II 71%, Berdasarkan hasil tersebut dapat di simpulkan bahwa peningkatan motivasi belajar siswa melalui Contextual Teaching and Learning (CTL) pada materi pembelajaran perbandingan di SMP Free Methodist 1 Medan di katakan berhasil

Responsible research and innovation in the digital age

At a time when increasingly potent technologies are being developed with the potential to transform society, researchers in all technological fields, including information and communications technology (ICT), are under growing pressure to consider and reflect on the motivations, purposes, and possible consequences associated with their research. This pressure comes from the general public, civil society, and government institutions. In parallel is a growing recognition that current ethics review procedures within ICT may not address broader concerns (such as the potential societal consequences of innovation)

Strangeness nuclear physics: a critical review on selected topics

Selected topics in strangeness nuclear physics are critically reviewed. This includes production, structure and weak decay of $\Lambda$--Hypernuclei, the $\bar K$ nuclear interaction and the possible existence of $\bar K$ bound states in nuclei. Perspectives for future studies on these issues are also outlined.Comment: 63 pages, 51 figures, accepted for publication on European Physical Journal

Context-dependent interactions and the regulation of species richness in freshwater fish

Species richness is regulated by a complex network of scale-dependent processes. This complexity can obscure the influence of limiting species interactions,

Erratum: "A Gravitational-wave Measurement of the Hubble Constant Following the Second Observing Run of Advanced LIGO and Virgo" (2021, ApJ, 909, 218)

[no abstract available

Search for Gravitational Waves Associated with Gamma-Ray Bursts Detected by Fermi and Swift during the LIGO-Virgo Run O3b

We search for gravitational-wave signals associated with gamma-ray bursts (GRBs) detected by the Fermi and Swift satellites during the second half of the third observing run of Advanced LIGO and Advanced Virgo (2019 November 1 15:00 UTC-2020 March 27 17:00 UTC). We conduct two independent searches: A generic gravitational-wave transients search to analyze 86 GRBs and an analysis to target binary mergers with at least one neutron star as short GRB progenitors for 17 events. We find no significant evidence for gravitational-wave signals associated with any of these GRBs. A weighted binomial test of the combined results finds no evidence for subthreshold gravitational-wave signals associated with this GRB ensemble either. We use several source types and signal morphologies during the searches, resulting in lower bounds on the estimated distance to each GRB. Finally, we constrain the population of low-luminosity short GRBs using results from the first to the third observing runs of Advanced LIGO and Advanced Virgo. The resulting population is in accordance with the local binary neutron star merger rate. © 2022. The Author(s). Published by the American Astronomical Society

Narrowband Searches for Continuous and Long-duration Transient Gravitational Waves from Known Pulsars in the LIGO-Virgo Third Observing Run

Isolated neutron stars that are asymmetric with respect to their spin axis are possible sources of detectable continuous gravitational waves. This paper presents a fully coherent search for such signals from eighteen pulsars in data from LIGO and Virgo's third observing run (O3). For known pulsars, efficient and sensitive matched-filter searches can be carried out if one assumes the gravitational radiation is phase-locked to the electromagnetic emission. In the search presented here, we relax this assumption and allow both the frequency and the time derivative of the frequency of the gravitational waves to vary in a small range around those inferred from electromagnetic observations. We find no evidence for continuous gravitational waves, and set upper limits on the strain amplitude for each target. These limits are more constraining for seven of the targets than the spin-down limit defined by ascribing all rotational energy loss to gravitational radiation. In an additional search, we look in O3 data for long-duration (hours-months) transient gravitational waves in the aftermath of pulsar glitches for six targets with a total of nine glitches. We report two marginal outliers from this search, but find no clear evidence for such emission either. The resulting duration-dependent strain upper limits do not surpass indirect energy constraints for any of these targets. © 2022. The Author(s). Published by the American Astronomical Society