17 research outputs found
PENGARUH MEDIA PEMBELAJARAN DIGITAL BERBASIS AUGMENTED REALITY (AR) TERHADAP KEMAMPUAN KOGNITIF SISWA PADA MATERI STRUKTUR ATOM
No full textABSTRAK Novriyanti (2025) : Pengaruh Media Pembelajaran Digital Berbasis Augmented Reality (AR) Kemampuan Kognitif Siswa Pada Materi Struktur Atom Penelitian ini dilatarbelakangi oleh penggunaan media Augmented Reality yang jarang digunakan dalam pembelajaran, sehingga hasil belajar siswa dengan menggunakan media Augmented Reality masih tergolong rendah. Jenis penelitian ini quasy ekperimen dengan desain non equivalent control. Tujuan penelitian ini untuk mengetahui pengaruh media pembelajaran digital berbasis Augmented Reality Kemampuan Kognitif siswa pada materi struktur atom. Penelitian ini dilaksanakan pada tahun ajaran 2024/2025 di SMA Negeri 12 Pekanbaru dengan materi pokok Struktur Atom. Instrumen yang digunakan pada penelitian ini adalah test objektif tipe pilihan ganda dan instrument non tes berupa angket. Berdasarkan analisis data tes, diperoleh hasil bahwa terdapat pengaruh yang disignifikan penggunaan media pembelajaran berbasis Augmented Reality terhadap kemampuan kognitif siswa pada materi struktur atom. Hal tersebut didasarkan pada hasil uji hipotesis dengan menggunakan uji t terhadap data Posstest. Hasil penelitian Posttest menunjukkan nilai signifikansi (2-tailed sebesar 0,00 < 0,05 sehingga menunjukkan adanya perbedaan yang signifikan antara kelas ekperimen dan kelas kontrol. Selain itu, rata-rata N-gain hasil belajar siswa kelas ekperimen 15% dengan kategori tinggi dan kelas kontrol 45% dengan kategori sedang. Kemampuan kognitif siswa kelompok ekperimen juga lebih unggul pada ranah kognitif tingkat C₂, C₄ dan C₅ Selanjutnya,Berdasarkan analisis data nontes, dapat disimpulkan bahwa secara keseluruhan penerapan media pembelajaran berbasis Augmented Reality dalam pembelajaran kimia struktur atom memperoleh respon baik. Kata kunci : Media Pembelajaran, Augmented Reality, Kemampuan Kognitif, Struktur Ato
Relevansi KTB terhadap Spiritualitas Gen Z
No full textThis paper discusses small groups in nurturing the spirituality of today's youth. In the context of modern life, there are many exciting activities that attract the attention of young people, which has led to a decline in involvement in small groups, as they are considered less important. However, through this argument, the author asserts that small groups are still relevant in providing a space for growth and accompanying young people to face the complex challenges of faith in today's world.
Keywords: Small groups, youth spirituality, spiritual growth
Tulisan ini membahas kelompok kecil dalam membina spiritualitas anak muda masa kini. Dalam konteks kehidupan modern banyak menawarkan kegiatan seru yang menarik perhatian anak muda, hal itu membuat keterlibatan dalam kelompok kecil menjadi menurun, karena dianggap kurang penting. Namun, melalui wacana argumentasi ini, penulis menegaskan bahwa kelompok kecil masih relevan untuk memberikan ruang bertumbuh dan mendampingi kaum muda untuk menghadapi berbagai tantangan iman yang sangat kompleks di masa sekarang.
Kata kunci: Kelompok kecil, spritualitas anak muda, pertumbuhan rohan
High nitrogen and elevated [CO2] effects on the growth, defense and photosynthetic performance of two eucalypt species
No full textAtmospheric nitrogen deposition and [CO2] are increasing and represent environmental problems. Planting fast-growing species is prospering to moderate these environmental impacts by fixing CO2. Therefore, we examined the responses of growth, photosynthesis, and defense chemical in leaves of Eucalyptus urophylla (U) and the hybrid of E. deglupta x E. camadulensis (H) to different CO2 and nitrogen levels. High nitrogen load significantly increased plant growth, leaf N, photosynthetic rate (A_[growth]), and photosynthetic water use efficiency (WUE). High CO2 significantly increased A_[growth], photosynthetic nitrogen use efficiency (PNUE) and WUE. Secondary metabolite (SM, i.e. total phenolics and condensed tannin) was specifically altered; as SM of U increased by high N load but not by elevated [CO2], and vice versa for SM of H
Penga Wetan Bambu Talang secara Sederhana
No full textPENGA WETAN BAMBU TALANG SECARA SEDERHANAThis research was conducted to examine the effectiveness of preserving bamboo with a Boron compound preservative. Four levels of concentrations, i.e 5, 10, 15, and 20% were tested through simple method on bamboo talang (Schizostachyum brachycladum). Lower part of each culm was cut and debarked prior to one week soaking in the boric solution. Results indicated that longitudinal penetration could reach 100%. Retention was varied in accord with boric concentration, but the 15% solution gave the highest retention
PENERAPAN METODE DIRECT READING ACTIVITY DALAM PEMBELAJARAN MEMBACA INTENSIF EDITORIAL
No full textPenelitian ini dilatarbelakangi oleh adanya kesulitan siswa seperti kurang termotivasinya untuk membaca editorial beserta metode yang konvensional yang tidak memacu antusiasme siswa sehingga menyebabkan siswa bosan dan tidak konsentrasi. Tujuan penelitian ini untuk mengetahui ada atau tidaknya pengaruh yang signifikan terhadap kemampuan siswa dalam membaca editorial dengan diterapkan metode DRA. Metode yang digunakan dalam penelitian ini adalah eksperimen semu dengan menggunakan kelas eksperimen dan kelas kontrol. Teori yang melandasi penelitian ini adalah Metode Direct Reading Activity. Data penelitian berupa hasil kemampuan berupa hasil kemampuan membaca editorial siswa kelas XI SMA Negeri 19 Bandung. Hasil penelitian adalah metode DRA efektif digunakan dalam pembelajaran membaca intensif editorial di kelas XI.
Kata Kunci: Penelitian, pembelajaran, Metode DRA, kemampuan membaca editoria.
The background of this study is because the student’s difficulty of lacking motivation to read editorial and the conventional method which do not stimulate the studens feeling bored and lack of concentration .the purpose of this research is to know there is or not the significant effectof the ability of student in reading editorial by applying the method of DRA. The method which is used in this research is Quasi Eksperimen by applying the experimental class and controlling class. The teory which is used in this research is Direct Reading Activity method. The data of the research concerns the result of the ability of reading editorial of student grade XI SeniorHigh School 19 Bandung.
Kata Kunci: Research, Learning, Direct Reading Activity, Intensif reading skill
: The Effect of the Use of Motion Demonstrations on the Frequency of Misconceptions of High School Students on the Topic of Motion Kinematics
No full textPenelitian ini bertujuan untuk menentukan pengaruh penggunaan peragaan gerak terhadap frekuensi miskonsepsi siswa pada topik kinematika gerak. Metode penelitian yang digunakan adalah eksperimen dengan desain One Group Pretest-Posttest. Populasi penelitian adalah siswa kelas XI-Fisika di SMA Negeri 1 Telaga Biru pada tahun ajaran 2024/2025. Sampel penelitian terdiri dari tiga kelas yang dipilih secara acak, yaitu kelas XI Fisika 6 sebagai kelas eksperimen, serta kelas XI-Fisika 1 dan XI-Fisika 2 sebagai kelas replikasi. Analisis data meliputi statistik deskriptif untuk menggambarkan karakteristik data, serta statistik inferensial, termasuk uji hipotesis dan analisis n-gain. Hasil analisis data menunjukkan penurunan frekuensi miskonsepsi yang signifikan setelah penerapan peragaan gerak. Rata-rata frekuensi miskonsepsi siswa menurun dari 9,57 menjadi 2,8 di kelas eksperimen, dari 8,17 menjadi 2,3 di kelas replikasi 1, dan dari 5,87 menjadi 1,1 di kelas replikasi 2. Uji hipotesis mengkonfirmasi adanya perbedaan signifikan dalam frekuensi miskonsepsi antara Pretest dan Posttest di ketiga kelas. Analisis n-gain menunjukkan peningkatan pemahaman konsep yang tinggi, dengan nilai 0,71 di kelas eksperimen, 0,75 di kelas replikasi 1, dan 0,72 di kelas replikasi 2.This study aims to determine the effect of using motion demonstrations on the frequency of students\u27 misconceptions in the topic of motion kinematics. The research employed an experimental method with a One Group Pretest-Posttest design. The population was class XI-Physics students at SMA Negeri 1 Telaga Biru in the 2024/2025 academic year. The sample consisted of three classes selected randomly, class XI Physics 6 as the experimental class, and classes XI Physics 1 and XI Physics 2 as replication classes. Data analysis involved descriptive statistics to characterize the data, and inferential statistics, including hypothesis testing and n-gain analysis. The results of the data analysis showed a significant decrease in the frequency of misconceptions after the application of motion demonstrations. The average frequency of student misconceptions decreased from 9.57 to 2.8 in the experimental class, from 8.17 to 2.3 in replication class 1, and from 5.87 to 1.1 in replication class 2, indicating a significant reduction. Hypothesis testing confirmed a significant difference in misconception frequency between the Pretest and Posttest across all three classes. The n-gain analysis revealed a high improvement in concept understanding, with values of 0.71 in the experimental class, 0.75 in replication class 1, and 0.72 in replication class 2
Photosynthetic nitrogen and water use efficiency of acacia and eucalypt seedlings as afforestation species
No full textThe ecophysiological traits of acacia and eucalypt are important in assessing their suitability for afforestation. We measured the gas-exchange rate, the leaf dry mass per area (LMA) and the leaf nitrogen content of two acacia and four eucalypt species. Relative to the eucalypts, the acacias had lower leaf net photosynthetic rate (PN), lower photosynthetic nitrogen-use efficiency (PNUE), higher water-use efficiency (WUE), higher LMA and higher leaf nitrogen per unit area (Narea). No clear differences were observed within or between genera in the maximum rate of carboxylation (Vcmax) or the maximum rate of electron transport (Jmax), although these parameters tended to be higher in eucalypts. PNUE and LMA were negatively correlated. We conclude that acacias with higher LMA do not allocate nitrogen efficiently to photosynthetic system, explaining why their PN and PNUE were lower than in eucalypts
Peatlands restorer plant species in the protected forest area
No full textLike other ecosystems, burnt peatlands will run into natural regeneration, characterized by pioneer plants’ presence as a succession process guard. However, annual burnt peatlands can complicate vegetation growth, including the pioneer’s presence. Besides that, it is unknown what kind of grow pioneers are, so the research aims to find out the pioneer plants’ diversity on burnt peatlands is essential. The reasonably extensive distribution of peat ecosystems
and high fire potential in Sumatra is Tanjung Jabung Regency of Jambi Province selected to study. The locations of plant species inventory are Orang Kayo Hitam Forest Park (burnt five times), village forest (HD) Sinar Wajo, and HD Koto Kandis Dendang (each burnt once) using the Nested Quadrat and Line Transect of vegetation survey method. Vegetation analysis showed that 22 pioneers were found in HD Sinar Wajo and 27 species in HD Koto Kandis Dendang. Some are identified as ferns (Pteridophyta), breed with spores, and pioneer plants reproduce by seeds
(Spermatophyta). In Orang Kayo Hitam Forest Park found 26 species consisting of plants, trees, shrubs, and lianas.
Among the three locations, we found the same type of pioneer. It is implied that patterns and regeneration processes can help each other in the same landscape
Pengembangan E-Modul Mata Pelajaran Fotografi Kelas X SMK Jurusan Desain Komunikasi Visual
No full textPenelitian ini dilatarbelakangi oleh permasalahan kurangnya sumber belajar berupa modul ajar/ buku khusus fotografi yang terstruktur dengan baik sebagai panduan dalam proses belajar mengajar di sekolah maupun di luar sekolah yang sesuai dengan kompetensi mata pelajaran, 2) Siswa hanya mengandalkan materi dari guru. 3) media pembelajaran yang digunakan selama ini belum membantu mengatasi masalah tidak adanya modul ajar, 4) siswa senang mencari materi di internet yang belum memiliki sumber jelas, 5) siswa lebih senang dengan pembelajaran media gambar, simulasi, dan video. Hal ini berdampak terhadap kurangnya tingkat pemahaman peserta didik dan pembelajaran cenderung berpusat pada guru. Jenis penelitian ini adalah penelitian pengembangan atau yang lebih akrab dikenal dengan istilah research dan development (R&D). Penelitian pengembangan ini menggunakan model pengembangan 4D yang terdiri dari 4 tahap, yaitu define, design, develop, disseminate. Uji validitas produk dilakukan oleh 3 validator yaitu 2 orang validator media dan 1 orang validator materi. Uji coba produk dilakukan kepada 10 orang siswa kelas X SMK N 7 Padang dengan tujuan untuk mengetahui kepraktisan penggunaan produk. Hasil pengembangan multimedia interaktif pada penelitian ini memperoleh tingkat validitas 100% pada aspek materi dengan kategori “sangat praktis”. Sementara pada aspek media memperoleh kategori sangat valid dengan persentase validitas 96,5% dari ahli media I, sedangkan dari ahli media II memperoleh persentase validitas sebesar 94% dengan kategori sangat valid. Untuk uji praktikalitas memperoleh nilai dengan persentase praktikalitas sebesar 90% dengan kategori “Sangat Praktis”. Berdasarkan hasil uji validitas dan praktikalitas dapat disimpulkan bahwa e-modul yang telah dikembangkan layak dan praktis digunakan pada mata pelajaran Fotografi kelas X SMK
Elevated CO2 offsets the alteration of foliar chemicals (n-icosane, geranyl acetate, and elixene) induced by elevated O-3 in three taxa of O-3-tolerant eucalypts
No full textEucalypts are important forest resources in southwestern China, and may be tolerant to elevated ground-level ozone (O-3) concentrations that can negatively affect plant growth. High CO2 may offset O-3-induced effects by providing excess carbon to produce secondary metabolites or by inducing stomatal closure. Here, the effects of elevated CO2 and O-3 on leaf secondary metabolites and other defense chemicals were studied by exposing seedlings of Eucalyptus globulus, E. grandis, and E. camaldulensis x E. deglupta to a factorial combination of two levels of O-3 (< 10 nmol mol(-1) and 60 nmol mol(-1)) and CO2 (ambient: 370 mu mol mol(-1) and 600 mu mol mol(-1)) in open-top field chambers. GC-profiles of leaf extracts illustrated the effect of elevated O-3 and the countering effect of high CO2 on compounds in leaf epicuticular wax and essential oils, i.e., n-icosane, geranyl acetate and elixene, compounds known as a first-line defense against insect herbivores. n-Icosane may be involved in tolerance mechanisms of E. grandis and the hybrid, while geranyl acetate and elixene in the tolerance of E. globulus. Elevated O-3 and CO2, singly or in combination, affected only leaf physiology but not biomass of various organs. Elevated CO2 impacted several leaf traits, including stomatal conductance, leaf mass per area, carbon, lignin, n-icosane, geranyl acetate and elixene. Limited effects of elevated O-3 on leaf physiology (nitrogen, n-icosane, geranyl acetate, elixene) were commonly offset by elevated CO2. We conclude that E. globulus, E. grandis and the hybrid were tolerant to these O-3 and CO2 treatments, and n-icosane, geranyl acetate and elixene may be major players in tolerance mechanisms of the tested species
