Efektivitas Model Project Based Learning terhadap Hasil Belajar Siswa Kelas V SD Negeri Oebafok

Masalah dalam penelitian ini adalah untuk mengetahui apakah ada efektivitas yang signifikan terhadap hasil belajar siswa dengan menggunkan model project based learning tentang materi sistem peredaran darah pada manusia kelas V SD Negeri Oebafok Kabupaten Rote Ndao.  Jenis penelitian adalah penelitian kuantitatif  yaitu pre-experimental design secara khusus penelitian ini menggunakan rancangan penelitian one-group prettest-posttest design. Sampel yang digunakan peneliti sebanyak 20 siswa yang terdapat pada kelas V. Data yang dianalisis dalam penilitian ini adalah hasil belajar IPA yang di kumpulkan  melalui tes pretest dan posttest, hasil penilitian yang dilakukan peniliti menunjukkan bahwa adanya perbandingan dari rata-rata posttest sebesar 78,20 > dari rata-rata nilai prestest yaitu 57,20. Selanjutnya hasil pengujian dianalisis menggunakan teknik analisis statistic paired samples test dibuktikan bahwa hasil perhitungan uji-t memiliki nilai t test sebesar 13,178 lebih besar (˃) dari nilai t tabel 12, 621 pada taraf signifikansi 95% dan d.f 19 = 1.729. Jadi  berdasarkan  kritetia  keputusan  penerimaan/penolakan maka Ho ditolak dan Hα diterima. Peniliti menyimpulkan bahwa terdapat efektivitas yang signifikan terhadap hasil belajar siswa pada materi IPA tentang sistem peredaran darah pada manusia sebelum meggunakan dan sesudah menggunakan model project based learning

PENGARUH MEDIA VIDEO ANIMASI TERHADAP HASIL BELAJAR IPAS MATERI SIKLUS AIR PADA SISWA KELAS V SD GMIT KUANINO 3 KOTA KUPANG

This research aims to find out whether animated video media has a significant influence on science learning outcomes regarding the water cycle in class V students at SD GMIT Kuanino 3, Kupang City. The type of research used is Quasi Experimental Design. The sampling technique used was purposive sampling technique with a sample size of 11 people. The research results prove that there is a significant influence between animated video media on student learning outcomes. This is proven by the difference in students\u27 completeness scores before being given treatment (pretest) and after being given treatment (posttest). There were 2 students who completed the pretest, while 11 students completed the posttest, so it can be said that the use of animated video media regarding the water cycle can improve student learning outcomes. The normality test of learning outcomes from the pretest-posttest obtained a significant value of 0.200 for the pretest and 0.127 for the posttest > 0.05 so that the data was normally distributed, the homogeneity test results showed (sig) Levene\u27s of 0.438 > 0.05 so the data obtained was homogeneous. Apart from that, testing the hypothesis with the t test using SPSS version 25 obtained a significance value (2-tailed) 0.000 < 0.05. Thus, animated video media has a significant influence on student learning outcomes

Pengaruh Model Problem Based Learning terhadap Hasil Belajar Materi Panas dan Perpindahannya di Kelas V SD Inpres Landeoe Kabupaten Rote Ndao

Penelitian ini merupakan penelitian kuantitatif bertujuan untuk mengetahui perbedaan signifikan hasil belajar siswa kelas V SD Inpres Landeoe Kabupaten Rote Ndao pada tema 6 subtema 2 pembelajaran 1 dengan memfokuskan pada muatan pembelajaran IPA dengan menggunakan model problem based learning. Penelitian ini menggunakan metode Pre-eksperimental design dengan bentuk desain One Group Protest-Posstest design. Populasi penelitian ini adalah siswa kelas V SD Inpres Landeoe tahun ajaran 2022/2023 yang berjumlah 22 siswa. Teknik pengumpulan data observasi, tes, dan studi dokumentasi. Hasil penelitian menunjukan bahwa nilai rata-rata hasil pretest sebesar 56,14 dan hasil  posttest sebesar 72,73 sehinggga dapat dikatakan bahwa penggunaan model problem based learning  dalam materi panas dan perpindahannya dapat meningkatkan hasil belajar peserta didik. Uji normalitas hasil belajar dari pretest-posttest didapatkan nilai signifikan sebesar 0,554 untuk pretest dan 0,408 untuk posttest > 0,05 sehingga data berdistribusi normal, hasil uji homogenitas menunjukan (sig) Levene’s sebesar 0,972 > 0,05 sehingga data yang diperoleh bersifat homogen. Hasil pengujian hipotesis, menggunakan paired sampel T-test menunjukan bahwa nilai sig. (2-tailed) dari nilai pretest dan posttest yaitu 0,000 < 0,05 dengan demikian dapat disimpulkan bahwa  model problem based learning berpengaruh terhadap hasil belajar siswa

Optical Design Trade Study for the Wide Field Infrared Survey Telescope [WFIRST]

The Wide Field Infrared Survey Telescope (WFIRST) mission concept was ranked first in new space astrophysics mission by the Astro2010 Decadal Survey incorporating the Joint Dark Energy Mission (JDEM)-Omega payload concept and multiple science white papers. This mission is based on a space telescope at L2 studying exoplanets [via gravitational microlensing], probing dark energy, and surveying the near infrared sky. Since the release of NWNH, the WFIRST project has been working with the WFIRST science definition team (SDT) to refine mission and payload concepts. We present the driving requirements. The current interim reference mission point design, based on the use of a 1.3m unobscured aperture three mirror anastigmat form, with focal imaging and slitless spectroscopy science channels, is consistent with the requirements, requires no technology development, and out performs the JDEM-Omega design

PENGARUH MODEL PROJECT BASED LEARNING TERHADAP HASIL BELAJAR PESERTA DIDIK PADA MATERI SIKLUS AIR DI KELAS V SDN KUASAET KOTA KUPANG

Penelitian ini merupakan penelitian kuantitatif yang bertujuan untuk mengetahui pengaruh penggunaan model project based learning terhadap hasil belajar peserta didik pada materi siklus air di kelas V SDN Kuasaet Kota Kupang. Penelitian ini menggunakan metode Pre-Experimental Design dengan bentuk design One Group Pretest-Posttest Design. Populasi dan sampel yang digunakan dalam penelitian ini adalah peserta didik kelas V SDN Kuasaet Kota Kupang tahun ajaran 2022/2023 yang berjumlah 15 orang. Hasil penelitian ini menunjukkan bahwa hasil uji normalitas dari data pretest-posttest menunjukkan nilai signifikansi 0,834 dan 0,156 > 0,05 sehingga kedua data dinyatakan berdistribusi normal. Hasil uji homogenitas menunjukkan nilai sig 0,536 > 0,05 sehingga data dapat dinyatakan homogen. Hasil uji hipotesis menggunakan uji Paired Sample T-test menunjukkan bahwa nilai thitung  4,186 > t tabel1,761 sehingga dapat disimpulkan bahwa terdapat penggaruh  yang signifikan melalui penggunaan model project based learning terhadap hasil belajar peserta didik

Efektivitas Penggunaan Aplikasi Wordwall dalam Pembelajaran IPS Secara Daring (Online) di Kelas Tinggi Sekolah Dasar

Situasi pandemi Covid-19 mengubah pembelajaran tatap muka di kelas menjadi pembelajaran daring (online). Media pembelajaran online yang menjamin keutuhan kegiatan pembelajaran serta mengangkat motivasi dan fokus peserta didik adalah aplikasi Wordwall. Masalah penelitian adalah ‘Bagaimana efektivitas penggunaan media wordwall pada kegiatan pembelajaran IPS secara daring di kelas tinggi SD?”, Penelitian bertujuan melihat efektivitas penggunaan media wordwall pada kegiatan pembelajaran IPS secara daring di kelas tinggi SD. Penelitian ini adalah jenis Mixed Method. Analisis data menggunakan analisis kuantitatif pada angket dan tes, analisis kualitatif pada wawancara. Subjek penelitian adalah peserta didik  kelas tinggi SDK Canosa. Hasil penelitian menunjukan rata-rata kelas hasil belajar IPS peserta didik  kelas tinggi adalah sebesar  79.99. Ditinjau dari KKM 70, maka diketahui 55 dari 58 (94.83%) orang peserta didik  tuntas, 3 orang (5.20%) tidak tuntas. Angket menunjukkan tingkat capaian responden (peserta didik ) sebesar 91.90% atau sangat efektif, hasil wawancara kepala sekolah dan guru mengindikasikan peserta didik  terlibat secara aktif dalam pembelajaran dan antusias mengerjakan kuis-kuis, menggabungkan kata, menemukan kata, dan melakukan game

Laboratory and field evaluation of acetic acid-based lures for male Asian citrus psyllid, Diaphorina citri.

The Asian citrus psyllid (ACP) is a vector of a pathogen associated with greening and thus a major problem in citriculture worldwide. Lures are much needed for improving ACP trapping systems for monitoring populations and surveillance. Previously, we have identified acetic acid as a putative sex pheromone and measured formic acid- and propionic acid-elicited robust electroantennographic responses. We have now thoroughly examined in indoor behavioral assays (4-way olfactometer) and field tests the feasibility of these three semiochemicals as potential lures for trapping ACP. Formic acid, acetic acid, and propionic acid at appropriate doses are male-specific attractants and suitable lures for ACP traps, but they do not act synergistically. An acetic acid-based homemade lure, prepared by impregnating the attractant in a polymer, was active for a day. A newly developed slow-release formulation had equal performance but lasted longer, thus leading to an important improvement in ACP trap capture at low population densities

General and specific avoidance: the development and concurrent validation of a new measure of avoidance coping

Research on coping has been hampered by psychometric shortcomings in coping scales, which have typically relied on items based on face-value, extracted too many factors or lacked the evidence for the obtained structure from confirmatory factor analysis. The present paper describes the development and concurrent validation of a new three-factor avoidance coping scale, the General and Specific Avoidance Questionnaire (GSAQ), which comprises General Avoidance, Emotional Avoidance and Conflict Avoidance. In contrast to earlier scales the items were derived from a scenario technique which elicits items from participants’ experience, and the three factor structure was endorsed by two confirmatory factor analyses on independent samples and a further exploratory factor analysis based on the total pooled sample of participants from all three analyses. Factor correlations indicate that the scales measure discrete facets of the avoidance coping domain, and while concurrent validation showed that General and Conflict Avoidance were related in predictable ways to criterion measures, the pattern for Emotional Avoidance was unexpected

Chiral Assemblies of Pinwheel Superlattices on Substrates

The unique topology and physics of chiral superlattices make their self-assembly from nanoparticles a holy grail for (meta)materials. Here we show that tetrahedral gold nanoparticles can spontaneously transform from a perovskite-like low-density phase with corner-to-corner connections into pinwheel assemblies with corner-to-edge connections and denser packing. While the corner-sharing assemblies are achiral, pinwheel superlattices become strongly mirror-asymmetric on solid substrates as demonstrated by chirality measures. Liquid-phase transmission electron microscopy and computational models show that van der Waals and electrostatic interactions between nanoparticles control thermodynamic equilibrium. Variable corner-to-edge connections among tetrahedra enable fine-tuning of chirality. The domains of the bilayer superlattices display strong chiroptical activity identified by photon-induced near-field electron microscopy and finite-difference time-domain simulations. The simplicity and versatility of the substrate-supported chiral superlattices facilitate manufacturing of metastructured coatings with unusual optical, mechanical and electronic characteristics

Search for squarks and gluinos in events with isolated leptons, jets and missing transverse momentum at s√=8 TeV with the ATLAS detector

The results of a search for supersymmetry in final states containing at least one isolated lepton (electron or muon), jets and large missing transverse momentum with the ATLAS detector at the Large Hadron Collider are reported. The search is based on proton-proton collision data at a centre-of-mass energy s√=8 TeV collected in 2012, corresponding to an integrated luminosity of 20 fb−1. No significant excess above the Standard Model expectation is observed. Limits are set on supersymmetric particle masses for various supersymmetric models. Depending on the model, the search excludes gluino masses up to 1.32 TeV and squark masses up to 840 GeV. Limits are also set on the parameters of a minimal universal extra dimension model, excluding a compactification radius of 1/R c = 950 GeV for a cut-off scale times radius (ΛR c) of approximately 30