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JOURNAL ONLINE OF PHYSICS
Published by Universitas Jambi
ISSN : -     EISSN : 25022016     DOI : -
Core Subject : Science,
Physics
Jurnal Online of Physics muncul sebagai wadah publikasi ilmiah dibidang fisika murni dan fisika terapan. Jurnal ini terbit secara online dua kali setahun yaitu pada bulan Juni dan Desember. Jurnal ini di terbitkan oleh program Studi Fisika Fakultas Sains dan Teknologi Universitas Jambi.
Arjuna Subject : -
Articles 271 Documents
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PENGARUH GRAMATUR TERHADAP DAYA REGANG PADA PEMBUATAN KERTAS BERBAHAN KULIT Aiysah Hannum Pulungan; Ety Jumiati; Ridwan Yusuf Lubis
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 3 (2023): JOP (Journal Online of Physics) Vol 8 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i3.24096

Abstract

Kertas adalah bahan tipis dan pipih yang terbuat dari serat-serat dari pulp yang digiling dan beberapa bahan yang selalu saling menempel. Serat yang digunakan berasal dari bahan alami antara lain selulosa dan hemiselulosa.Penelitian ini dilakukan untuk pembuatan kertas dari kulit singkong menggunakan aktivator NaOH 3%, 3,5% dan 4%. Penelitian yang dilakukan yaitu dengan metode eksperimen secara kuantitatif. Berdasarkan hasil pengujian diperoleh pengujian meliputi gramatur, daya regang serta karakterisasi SEM. Dari pengujian dapat dihasilkan nillai gramatur sampel A = 49,33 g/cm2, sampel B = 50,33 g/cm2, sampel C = 56,33 g/cm2, dan hasil nilai daya regang sampel A = 0,0015%, sampel B= 0,0024 %, dan sampel C = 0,0029%. Hasil SEM menunjukkan kertas yang diaktivasi NaOH 4% memiliki serat yang lebih rapat dibandingkan kertas yang diaktivasi NaOH 3% dan 3,5%. Dari hasil nilai karakterisasi sampel dapat diketahui bahwa sampel C merupakan sampel yang terbaik dengan pengaruh NaOH 4% yang telah memenuhi SNI No 14-0937-2005 mengenai kertas.
UJI LAJU KOROSI DENGAN MENGGUNAKAN INHIBITOR DAUN KELOR UNTUK BESI HOLLOW (BAJA GALVALUM) DALAM MEDIUM AIR HUJAN Muh. Yusuf; Rahmaniah Rahmaniah; Sefrilita Risqi Adikaning Rani
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 3 (2023): JOP (Journal Online of Physics) Vol 8 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i3.25215

Abstract

Telah dilakukan penelitian yang bertujuan untuk mengetahui efisiensi ekstrak daun kelor dalam menghambat laju korosi pada besi hollow (baja galvalum) dengan menggunakan metode kehilanagn massa (Mass Loss), untuk mengetahui pengaruh variasi konsentrasi inhibitor ekstrak daun kelor terhadap laju korosi, mengetahui pengaruh waktu perendaman terhadap laju korosi dan untuk mengetahui waktu perendaman terhadap efisiensi inhibisi, metode yang digunakan pada penelitian ini adalah metode kehilangan massa (Mass Loss). Adapun hasil penelitian yang telah dilakukan, ekstrak daun kelor sebagai penghambat laju korosiyang digunakan sebagai inhibitor pada besi hollow (baja galvalum) dengan menggunakan medium air hujan dengan waktu perendaman 5,15 dan 25 hari dengan variasi konsentrasi 400 ppm dan 600 ppm. Hasil yang didapatkan pada sampel tanpa inhibitor pada waktu perendaman 5,15 dan 25 hari berturut turut 153,773 mpy, 11,539 mpy dan 0,483 mpy, Hasil nilai laju korosi pada penambahan inhibitor konsentrasi 400 ppm pada waktu perendaman 5,15 dan 25 hari berturut turut 135, 256 mpy, 9,929 mpy dan 0,161 mpy, Hasil nilai laju korosi pada penambahan inhibitor konsentrasi 400 ppm pada waktu perendaman 5,15 dan 25 hari berturut turut 133,646 mpy, 2,415 mpy dan 0,161 mpy. Hasil nilai efisiesnsi inhibisi pada sampel tanpa penambahan inhibitor berturut turut 12 % dan 12,8 %, hasil nilai efisiesnsi inhibisi pada sampel penambahan inhibitor konsentrasi 400 ppm berturut turut 91 % dan 98 %, %, hasil nilai efisiesnsi inhibisi pada sampel penambahan inhibitor konsentrasi 600 ppm sebesar 99 %. Kata Kunci : Korosi, Inhibitor, Laju Korosi, Konsentrasi, Waktu Perendaman    
PEMETAAN TINGKAT RAWAN GEMPA BERDASARKAN NILAI PGA (PEAK GROUND ACCELERATION) MENGGUNAKAN METODE MC. GUIRRE R. K DAN DONOVAN Nur Ainun; LAILATUL HUSNA LUBIS; RATNI SIRAIT
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 3 (2023): JOP (Journal Online of Physics) Vol 8 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i3.25480

Abstract

Provinsi Aceh terletak diantara lempeng besar dunia yaitu lempeng Eurasia dan lempeng India-Australia serta sembilan lempeng kecil yang bertemu membentuk jalur-jalur pertemuan yang sangat kompleks. Akibatnya Provinsi Aceh merupakan zona tektonik yang sangat aktif. Tujuan penelitian ini untuk mengetahui nilai PGA (Peak Ground Acceleration) menggunakan metode mc. Guirre R.k dan Donovan serta mengetahui zonasi tingkat resiko kegempaan di wilayah Aceh. Penelitian ini dilakukan dengan titik koordinat 1˚-5˚ LS dan 95˚-98˚ BT. Data yang digunakan berasal dari USGS dengan magnitudo >5 dan kedalaman (0-70) km. Hasil penelitian yang di peroleh dari PGA (Peak Ground Acceleration) dari metode mc. Guirre R.K sebesar 153,288919 gal dan hasil penelitian dari metode Donovan sebesar 130,5759397 gal. Sedangkan zonasi percepatan tanah maksimum berada di wilayah Kabupaten Pidie Jaya. Pada wilayah tersebut terdapat endapan aluvium dan batuan berusia tersier yang bersifat lunak atau tidak kuat. Sehingga mengakibatkan wilayah tersebut rawan kegempaan.
ALAT MONITORING SUHU DAN DETAK JANTUNG MANUSIA BERBASIS INTERNET OF THINGS MENGGUNAKAN BLYNK Masthura Masthura; Mulkan Iskandar Nasution; Rajai Sitorus
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.25905

Abstract

The purpose of this research is to create and design a way to monitor temperature and human heart rate based on the Internet of Things using blynk. The process of making an Internet of Things-based human heart rate and temperature monitoring device begins with hardware design by connecting all tools, namely, NodeMCU Esp8266, Base Board, Mlx90614, Max30100, Oled, Led, and Buzzer followed by designing software on Arduino and the blynk application where later the measurement results will be compared with the actual tool commonly used, namely the Tensimeter. Based on previous research conducted by Agung (2019), a heart rate and body temperature measuring instrument was made using the Ds18b20 temperature sensor and the Max30100 sensor with Bluetooth Hc-05 communication with an accuracy of 99.1% on heart rate and 99.4% on body temperature, and previous research conducted by Jarot (2021), heart rate measurements were carried out with a pulse sensor 3 times with an error of 16.7 – 20%, as well as previous research conducted by Muhlis (2019). 2017), measurements of heart rate and body temperature were carried out wirelessly with a pulse sensor using 10 objects with an error of 4.94% and using an LM35 with 10 objects with an error of 1.66%. In this study using 3 different people objects which were measured 3 times for each object. with an average error percentage of 0.91% for body temperature and 2.90% for heart rate. after going through the process of hardware design and software design, we have succeeded in designing a temperature monitoring device and human heart rate that can be monitored remotely using the blynk application and has functioned properly and works according to its function and has the advantage of being easier to monitor because it is based on the Internet of Things in real time and has very accurate accuracy with measuring instruments commonly used compared to previous studies.
ANALISIS LAGRANGIAN NULL NONSTANDAR DAN FUNGSI GAUGE UNTUK HUKUM INERSIA NEWTON : SEBUAH REVIEW Amelia A.P Ambot; Herry F. Lalus; Hartoyo Yudhawardana
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.25909

Abstract

This paper describes a review of a journal entitled 'Nonstandard Null Lagrangians and Gauge Functions for Newtonian Law of Inertia' which discusses Nonstandard Lagrangian Null solutions for Newton's Law of Inertia. The purpose of this study is to present in detail the Lagrangian Formalism method for generating Nonstandard Lagrangian Null and its Gauge function for Newton's Law of Inertia, as well as the role of action invariant in generating Lagrangian Null and Exact Gauge functions, by deriving a one-dimensional oscillator arm using the basic Lagrangian equations. The Nonstandard Null Lagrangian is derived from the Nonstandard Lagrangian, then the two Lagrangian Null are entered into the action invariant to make it Exact, after the Nonstandard Lagrangian Null is declared Exact, it is substituted into  which represents Newton's Law of Inertia. The results of this research show that an Exact Nonstandard Lagrangian Null can be generated by making the Gauge Function Invariant, so that the first Nonstandard Lagrangian Null and Gauge Function for Newton's Law of Inertia are obtained.
PERANAN AKIVATOR DAN LUAS PENAMPANG KARBON AKTIF TERHADAP KEMAMPUAN ADSORPSI KARBON AKTIF PADA MINYAK GORENG BEKAS PAKAI Miftahul Husnah; Ridwan Yusuf Lubis; Lisa Astari
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 1 (2023): JOP (Journal Online of Physics) Vol 9 No 1
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i1.26005

Abstract

Used oil or used cooking oil is oil that is produced from leftover frying. The high price of cooking oil and the high need for use also makes fried traders use used cooking oil continuously which has a negative impact on health. This study aims to determine the role of activators and cross-sectional area on the adsorption ability of activated carbon produced from nipa palm shells in the process of refining used oil. The sample used is used cooking oil which is then adsorbed using activated carbon with different cross-sectional areas. Analysis of the cross-sectional area shows that variations in the concentration of NaCl as an activator in the manufacture of activated carbon from nipa palm shells affect the cross-sectional area, the higher the concentration of NaCl activator, the greater the cross-sectional area of activated carbon produced. The surface area of activated carbon activated by NaCl 0M, 4M, 6M and 8M had respective values of 11.1489 m2/g, 11.4487 m2/g, 11.5028 m2/g, 11.5079 m2/g. The results show that the greater the cross-sectional area of activated carbon, the greater the ability of activated carbon to adsorb used oil, with a value of water content and volatile matter of 0.2612% - 0.1195%, peroxide of value (POV) of 11.8629 meq/g - 5.3029 meq/g, Acid Value (AV) of 1.3368 mg KOH/g - 0.5393 mg KOH/g. Optimum results were obtained on activated carbon activated with 8M NaCL activator, this was due to the increasing concentration of the activator, more pores were formed so that the absorption capacity of activated carbon also increased.
ANALISIS SIFAT OPTIK NANO PARTIKEL KARBON BERBAHAN DAUN PANDAN WANGI (PANDANUS AMARYLLIFOLIUS) DENGAN METODE SINTESIS HIDROTERMAL Rahmaniah Nalwi; Akhiruddin Maddu; Mersi Kurniati; Jumardin Jumardin
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 3 (2023): JOP (Journal Online of Physics) Vol 8 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i3.26728

Abstract

Penelitian ini bertujuan untuk menentukan sifat optik, energi pergeseran Stokes, energi celah pita (Eg), gugus fungsi senyawa kimia dan ukuran karbon nano partikel atau Carbon Nanoparticles (CPNs). Sifat optik terdiri dari absorbansi dan intensitas flouresens yang dihasilkan oleh metode sintesis hidrotermal (150, 160, dan 180) ºC. Panjang gelombang absorbansi dan intensitas flouresens terdeteksi dengan metode spektroskopi UV-Vis (396.31, 399.61, dan 411.24) nm dan eksitasi laser 405 nm untuk emisi flouresens (524.18, 512.04, dan 510.92) nm. Energi pergeseran Stokes diperoleh berdasarkan perbedaan energi foton untuk ekesitasi (absorbansi) dan emisi (flouresen) dengan nilai (0.59, 0.55 dan 0.69) eV. Energi celah pita (Eg) ditentukan dengan mengekstrapolasi grafik ke rentang linier untuk memotong sumbu energi foton. Nilai Eg adalah (2.55, 3.43, dan 2.50) eV. Spektrum dan nilai koefisien ekstensi (k), konduktivitas optik (σopt) meningkat sedangkan indeks bias (n) menurun sering bertambahnya suhu hidrotermal. Spektrum FT-IR dan ukuran CNPs dilakukan dengan menggunakan sampel suhu 180 ºC. Gugus fungsi kimia yang terbentuk adalah C-H, C-N, N=C=S, O=C=O serta senyawa Nitrogen (NO2). Ukuran rata-rata nano partikel karbon adalah 11.09 nm berdasarkan intensitas (%), volume (%) dan nomor (%) partikel pada sampel CNPs.
PENGARUH VARIASI SUHU KALSINASI TERHADAP PARAMETER MIKROSTRUKTUR (STURKTUR KRISTAL DAN GUGUS FUNGSI) NANOPARTIKEL TIO2 SEBAGAI KANDIDAT MATERIAL FOTOKATALISIS Novita Kundiman; Kurnia Kurnia; I Putu Tedy Indrayana; Bayu Achil Sadjab
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 3 (2023): JOP (Journal Online of Physics) Vol 8 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i3.26814

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh suhu kalsinasi terhadap parameter mikrostruktur nanopartikel TiO2. Nanopartikel TiO2 masing-masing ditimbang dengan massa 1 gram dan dikalsinasi pada suhu 150 oC, 200oC, 250 oC dengan waktu 3 jam setiap suhu. Powder nanopartikel TiO2 yang telah dikalsinasi selanjutnya dikarakterisasi dengan menggunakan alat XRD untuk mengengetahui parameter mikrostrukturnya. Kemudian, untuk mengetahui gugus fungsi nanopartikel TiO2 dapat dikarakterisasi dengan spektra Transformasi Fourier Inframerah (FTIR). Karakterisasi yang dihasilkan oleh XRD berupa pola difraksi yang menunjukan telah terbentuknya fasa TiO2 yang memiliki struktur kristal tetragonal dengan parameter kisi kristal a bernilai a= 3,782 Å - 3,784 Å dan parameter kisi c bernilai c = 9,500 Å - 9,509 Å . Nilai tersebut mendekati nilai parameter kisi TiO2 sesuai referensi, yaitu 3,785 Aͦ untuk a dan 9,514 Aͦ untuk c (JCPDS 21-1272). Ukuran kristalit (t) berada pada kisaran nilai 22,99 (nm)-24,39 (nm) dan kerapatan dislokasi kristal (D) berada pada kisaran nilai 1,679 nm-2 x10-3 – 1,892 nm-2 x10-3. Sedangkan kerapatan kristal berada pada kisaran nilai yaitu 3,897gram/cm3 – 3,903 gram/cm3 dan Spektra FTIR memberi informasi terjadinya vibrasi gugus Ti – O – Ti berada pada interval bilangan gelombang 505 cm-1 – 600 cm-1 dengan vibrasi stretching. Gugus fungsi Ti – O berada pada interval bilangan gelombang 610 cm-1 – 1000 cm-1 vibrasi stretching. Pada interval bilangan gelombang 1700 – 3600 cm-1 vibrasi bending. Dalam Mengoptimalkan parameter mikrostruktur sebagai material fotokatalis, bahan nanopartikel TiO2 dapat dilakukan dengan mengkontrol suhu kalsinasi.
SISTEM MONITORING KWH METER DIGITAL BERBASIS IOT PADA LABORATORIUM PERALATAN MEDIS Danang Widyawarman; Tri Hastono
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 3 (2023): JOP (Journal Online of Physics) Vol 8 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i3.26931

Abstract

The educational process, which is supported by adequate laboratory facilities and infrastructure, will produce professional higher education tri-dharma outputs, both for students and lecturers. The Medical Equipment Laboratory is a place where experimental studies with various equipment and devices, analyses, and observations are carried out. The amount of electrical energy used by a university can be measured using an electric energy meter, namely the kWh meter, but the university cannot monitor which building or room uses the most electrical energy because it only knows the amount of power used each month. Given these problems, a digital kWh Meter monitoring tool based on the Internet of Things (IoT) is designed to measure the amount of current, voltage, power, and costs that must be incurred while using medical equipment and can then be monitored in real time using the Blynk application as the server. The implementation system for monitoring the kwh meter using the PZEM-004T sensor has a very good accuracy rate of 99.52% for measuring voltage and 99.87% for measuring current on medical equipment in the medical equipment laboratory at the PGRI Yogyakarta University. It was found that the greater the applied load value, the more the impact on data outputs such as current and voltage would affect the size of the monthly electricity bill. The monitoring system can be carried out within a radius of 20 meters as long as the smartphone is connected to a WiFi connection. Monitoring activities and electrical device control activities can be carried out.
IDENTIFIKASI BATUAN PENYUSUN SISTEM PANAS BUMI NON-VULKANIK BANGKA TENGAH BERDASARKAN PENAMPANG 2D ANOMALI GAYA BERAT Eri Gusnia; Tri Kusmita
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 3 (2023): JOP (Journal Online of Physics) Vol 8 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i3.27080

Abstract

The geothermal system in the Central Bangka area is a radiogenic non-volcanic geothermal system. This geothermal system is not associated with the volcanism process. The purpose of this research is to identify the rock components of the Non-Volcanic geothermal system in the Central Bangka geothermal field based on the 2D cross section of the gravity anomaly. This research was conducted by performing spectral analysis using Fast Fourier Transform (FFT) on the complete Bouger anomaly to obtain the residual anomaly. 2D modeling of the residual anomaly was done using inverse modeling with the smoothness constraint equation. The results show that the subsurface structure of the non-volcanic geothermal system in the Central Bangka geothermal area consists of cover rock in the form of sandstone (2.38 - 2.42 gr/cm3) at a depth of 3,000 m, reservoir rock consists of granite. (2.65 - 2.66 gr/cm3) at a depth of 0 - 9,000 m and the bedrock consists of diorite (2.87 - 2.9 gr/cm3) at a depth of 2,000 - 10,000 m.

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