Article Per Year (5 Year)
p-Index From 2020 - 2025
0.444
P-Index
This Author published in this journals
All Journal Jurnal Penelitian Saintek Jurnal Ilmiah Wahana Pendidikan
Warjono, Warjono
Unknown Affiliation
Religion Decision Sciences, Operations Research & Management Education Social Sciences Other

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Pengaruh Latihan Zig-Zag Run Terhadap Kecepatan Tendangan Samping (T) Pada Siswa Ekstrakurikuler Pencak Silat di SMA Negeri 1 Sukagumiwang Kabupaten Indramayu Warjono, Warjono; Fahrudin, Fahrudin; Sumarno, Ardawi
Jurnal Ilmiah Wahana Pendidikan Vol 9 No 23 (2023): Jurnal Ilmiah Wahana Pendidikan
Publisher : Peneliti.net

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.10428658

Abstract

This study aims to determine the effect of the zig-zag run training method on side kick speed (T) in martial arts extracurricular students at SMA Negeri 1 Sukagumiwang, Indramayu Regency. This research uses quantitative methods. The population in this study were 20 students. This study used a total sampling technique, because researchers took the entire population. Data processing was carried out using SPSS Software Version 25. Instrument analysis carried out was Validity and reliability. While the data analysis technique used is normality test, homogeneity and hypothesis testing which consists of Chi-square analysis, Levene test and t-test using the independent t-test. Based on the normality test, it can be seen if the data is normal because Sig. > 0.05, that is, in the pretest control group, a score of Lo = 0.566 was obtained, then the post-test results obtained a score of Lo = 0.854. Levene test is obtained if Sig. > 0.05, namely the value of Sig. 383 > 0.05 which indicates that the data is homogeneous. The independent t-test is obtained if the sig. (2-tailed) < 0.05, namely the sig. (2-tailed) = 0.004 less than the significance level (a) = 0.05, H0 is rejected and H1 is accepted, meaning there is an influence. The conclusion in this study is that there is an effect of the zig-zag run training method on the speed of side kicks (T) in pencak silat extracurricular students at SMA Negeri 1 Sukagumiwang, Indramayu Regency.
Identifikasi penyebab awan konvektif pada fenomena hujan ekstrem disertai es berbasis citra radar dual polar Rafi, Rayhan; Kuncoro, Dwi; Arzhida, Bima; Jannah Indriyani, Noor; Warjono, Warjono
Jurnal Penelitian Saintek Vol 30, No 2 (2025)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v30i2.89950

Abstract

Pada 11 Maret 2025, wilayah Daerah Istimewa Yogyakarta (DIY) mengalami kejadian cuaca ekstrem berupa hujan lebat yang disertai angin kencang, kilat, dan disertai es. Fenomena ini menimbulkan dampak signifikan di berbagai lokasi, terutama di Kabupaten Sleman, Kota Yogyakarta, dan Kabupaten Bantul. Penelitian ini bertujuan untuk menganalisis dinamika atmosfer yang menyebabkan terbentuknya awan konvektif penghasil hujan es di wilayah tersebut dengan pendekatan multi-instrumentasi meteorologi. Metode yang digunakan meliputi analisis peta streamline, data sinoptik dari Stasiun Klimatologi Yogyakarta, citra satelit Himawari-9 (HCAI), data radar cuaca dual polar dari Stasiun Meteorologi Ahmad Yani, serta validasi hujan menggunakan data pos pengamatan. Hasil analisis menunjukkan bahwa terdapat konvergensi angin lokal dan penurunan tekanan udara yang signifikan, yang memicu terbentuknya awan Cumulonimbus secara cepat dan intensif. Produk radar (CMAX, VCUT, ZHAIL, HAILSZ, dan SWI) mengindikasikan keberadaan struktur awan konvektif kuat dengan reflektivitas tinggi (>60 dBZ), pola weak echo region (WER), overhang echo (OR), dan kemunculan hail spike atau three body scatter spike (TBSS) yang menguatkan dugaan adanya partikel es besar di dalam awan. Estimasi ukuran hail mencapai 10–20 mm dengan probabilitas kejadian hujan es lebih dari 80%. Validasi data curah hujan dari 121 titik pengamatan menunjukkan distribusi hujan intensitas sedang hingga lebat dengan curah hujan tertinggi sebesar 74 mm/hari di Kecamatan Minggir, Sleman. Studi ini menegaskan pentingnya integrasi data satelit, radar, dan pengamatan permukaan dalam mendeteksi dan memahami kejadian cuaca ekstrem di wilayah tropis.
Co-Authors Arzhida, Bima Fahrudin Fahrudin Jannah Indriyani, Noor Kuncoro, Dwi Rafi, Rayhan Sumarno, Ardawi