Wahana Fisika最新文献

{"title":"Visualisasi Aliran Udara pada Kotak Konveksi Udara Menggunakan Adaptive Finite Element Method","authors":"Sayahdin Alfat, Abdin Abdin, R. Eso","doi":"10.17509/wafi.v5i2.28761","DOIUrl":"https://doi.org/10.17509/wafi.v5i2.28761","url":null,"abstract":"","PeriodicalId":143376,"journal":{"name":"Wahana Fisika","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123772696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Penggunaan Perangkat Lunak dari Open Source dan Metode Komputasi untuk Prediksi Kebisingan yang Ditimbulkan oleh Airframe Pesawat Terbang","authors":"Aprilia Sakti Kusumalestari, Santoso Soekirno","doi":"10.17509/wafi.v5i2.27986","DOIUrl":"https://doi.org/10.17509/wafi.v5i2.27986","url":null,"abstract":"","PeriodicalId":143376,"journal":{"name":"Wahana Fisika","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133851683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analisis Nilai Resistivitas Tanah Perkebunan Berdasarkan Variasi Kadar Air","authors":"Gisela Adelita, Ardi Rizkia Ferahenki, Mimin Iryanti, A. Aminudin","doi":"10.17509/wafi.v5i2.15052","DOIUrl":"https://doi.org/10.17509/wafi.v5i2.15052","url":null,"abstract":"","PeriodicalId":143376,"journal":{"name":"Wahana Fisika","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124555014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cover","authors":"Wahana Fisika","doi":"10.17509/wafi.v5i2.30761","DOIUrl":"https://doi.org/10.17509/wafi.v5i2.30761","url":null,"abstract":"Wahana Fisika Volume 5 No 2 2020","PeriodicalId":143376,"journal":{"name":"Wahana Fisika","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116232664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Penentuan Tingkat-Tingkat Energi Vibrasi Molekul Hidrogen Pada Keadaan Elektronik Dasar Menggunakan Potensial Morse","authors":"R. K. Pingak, A. Johannes","doi":"10.17509/wafi.v5i1.18614","DOIUrl":"https://doi.org/10.17509/wafi.v5i1.18614","url":null,"abstract":"Pendekatan Born-Oppenheimer diterapkan untuk menghitung tingkat energi vibrasi keadaan dasar molekul hidrogen. Persamaan Schrodinger untuk inti atom diselesaikan dengan menggunakan metode semi-klasik, di mana inti atom diasumsikan bergerak secara klasik dalam sumur potensial dan energi vibrasi ditentukan dengan menerapkan aturan kuantisasi kuantum. Potensial yang digunakan pada penelitian adalah potensial Morse. Dalam penelitian ini, tingkat energi vibrasi dihitung dengan metode numerik, yaitu metode integrasi Simpson dan metode regula falsi. 15 Tingkat energi vibrasi dari molekul H2 diperoleh dan dibandingkan dengan data hasil eksperimen. Perbandingan ini mengindikasikan pendekatan yang digunakan pada penelitian ini memberikan hasil yang sangat akurat pada tingkat energi vibrasi yang relatif rendah (0≤n≤4), dengan kesalahan kurang dari 0,7%, dan untuk 5≤n≤8 dengan kesalahan maksimum 7,3%. Keakuratan menurun ketika tingkat energi vibrasi meningkat. Secara khusus, untuk n = 13 dan n = 14, kesalahan meningkat secara signifikan, menunjukkan gagalnya pendekatan ini untuk tingkat energi vibrasi yang relatif tinggi, khususnya untuk dua tingkat energi ini. Born-Oppenheimer approximation was applied to calculate vibrational energy levels of ground state of Hydrogen molecule. The Schrodinger equation for the nuclei was solved using a semi-classical method, in which the nuclei are assumed to move classically in a potential well and the vibrational energies are determined by applying the quantum mechanical quantization rules. Potential used in this research was the Morse potential. Here, vibrational energy levels of the molecule were calculated using numerical methods, i.e. Simpson integration method and false position method. 15 Vibrational energy levels of the H2 molecule were obtained and compared to the corresponding results from experiments. The comparison indicated that the approximation used in this research yielded very accurate results for relatively low vibrational levels (0≤n≤4), with errors being less than 0.7% and for 5≤n≤8 with maximum of 7.3% errors. The accuracy decreased as the vibrational levels increased, as expected. In particular, for n=13 and n=14, errors significantly increased, indicating the breakdown of the approximation for relatively high vibrational levels, in particular for these two energy levels.           Keywords: Hydrogen Molecule; Morse Potential; Born-Oppenheimer Approximation; Simpson Method; False Position Method","PeriodicalId":143376,"journal":{"name":"Wahana Fisika","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123984793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Jarak Minimum Orbit dan Tumbukan Populasi Asteroid dekat-Bumi dengan Planet Bumi","authors":"A. Fauziah, J. A. Utama, Ferry Mukharradi Simatupang","doi":"10.17509/wafi.v5i1.23562","DOIUrl":"https://doi.org/10.17509/wafi.v5i1.23562","url":null,"abstract":"","PeriodicalId":143376,"journal":{"name":"Wahana Fisika","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124327338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pembangkit Listrik Termoelektrik Terintegrasi Kompor Sekam Padi","authors":"Yeni Rima Liana, A. Yulianto, I. Yulianti","doi":"10.17509/wafi.v5i1.24000","DOIUrl":"https://doi.org/10.17509/wafi.v5i1.24000","url":null,"abstract":"","PeriodicalId":143376,"journal":{"name":"Wahana Fisika","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134295880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sintesis dan Karakterisasi Nanopartikel Magnetik CoZnFe2O4 dengan Metode Kopresipitasi","authors":"Heri Kiswanto, Edi Suharyadi, Takeshi Kato, Satoshi Iwata","doi":"10.17509/wafi.v5i1.24084","DOIUrl":"https://doi.org/10.17509/wafi.v5i1.24084","url":null,"abstract":"","PeriodicalId":143376,"journal":{"name":"Wahana Fisika","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126646028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SIFAT OPTIK CARBON DOTS (C-DOTS) DARI DAUN BAMBU HASIL SINTESIS HIJAU BERBANTUKAN GELOMBANG MIKRO","authors":"Permono Adi Putro, Akhiruddin Maddu","doi":"10.17509/WAFI.V4I1.15569","DOIUrl":"https://doi.org/10.17509/WAFI.V4I1.15569","url":null,"abstract":"Carbon dots (C-dots)  adalah tipe baru dari nanopartikel berpendar yang dapat mudah disintesis dari sumber alami. Sintesis C-dots dari daun bambu telah berhasil dilakukan menggunakan teknik sintesis hijau berbantukan gelombang mikro. Teknik sintesis hijau dilakukan dengan menggunakan air sebagai pelarut non-kimia dan sumber alami. Sintesis dilakukan menggunakan variasi konsentrasi prekursor untuk dipelajari pengaruhnya terhadap sifat fisik dan sifat optiknya. Sifat fisik C-dots menunjukkan warna transparan di bawah cahaya tampak, dan warna hijau di bawah laser UV 405 nm. Sifat optik C-dots dikarakterisasi menggunakan spektrofotometer UV-Vis, dan spektrofotometer dengan sumber eksitasi 405 nm. Konsentrasi prekursor mempengaruhi intensitas eksitasi dan emisi, namun pergeseran Stokes C-dots memiliki kestabilan yang sangat baik dalam larutan berair. Pergeseran Stokes berasal dari keadaan transisi n–π* dari struktur ikatan aromatik C=O pada permukaan C-dots. Kami peroleh C-dots yang berpotensi untuk diaplikasikan sebagai bioimaging seluler in vivo dan in vitro dan biosensing ion logam dan garam.","PeriodicalId":143376,"journal":{"name":"Wahana Fisika","volume":"55 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116786393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ANALISIS KARAKTERISTIK SISTEM KONTROL TEMPERATUR BERBASIS AUTONICS TK4S-14RN UNTUK PROTOTIPE PENGERING BAHAN PAKAIAN","authors":"Desi Silvia Astuti, A. Aminudin, Waslaluddin Waslaluddin","doi":"10.17509/WAFI.V4I1.15053","DOIUrl":"https://doi.org/10.17509/WAFI.V4I1.15053","url":null,"abstract":"Penelitian tentang analisis karakteristik sistem dari sistem kontrol temperatur berbasis Autonics TK4S-14RN yang berbasis Autonics TK4S-14RN.","PeriodicalId":143376,"journal":{"name":"Wahana Fisika","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127822577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}