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Journal of Aceh Physics Society
Published by Universitas Syiah Kuala
ISSN : -     EISSN : 23558229     DOI : -
Core Subject : Science,
Physics
Focus of Journal of Aceh Physics Society (JAcPS) provides a forum for original paper works that enhances understanding of physics and their application. Scope of Journal of Aceh Physics Society (JAcPS) paper related to the development of new experimental methods, visualization techniques, material physics, optic, laser and instrumentation in physics is an important part of this journal. Experience gained and lessons learned in building test facilities and in measuring and reducing test data are important aspect of any experimental work. Authors are encouraged to report this experience and to summarize the original data. Archival review paper, short communication, invited papers, discussion of previously published papers, and book reviews are regular feature of the journal, in addition to full-length article.
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Articles 152 Documents
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Minerals Identification of Bio-Solar Gemstone from Aceh Akmal Nizar; Mursal Mursal; Ismail Ismail
Journal of Aceh Physics Society Volume 5 Number 2, September 2016
Publisher : PSI-Aceh

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Abstract

Salah satu batu mulia yang terkenal di Aceh disebut Bio-Solar. Batu permata ini banyak ditemukan di Aceh, namun, informasi detail tentang batu permata ini masih sangat terbatas. Dalam penelitian ini telah dilakukan karakterisasi batu permata Bio-Solar yang berasal dari Aceh dengan menggunakan X-Ray Florescent (XRF). Hasil penelitian menunjukkan bahwa batu permata Bio-Solar mengandung mineral-mineral CaO (59,8%), SiO2 (19,7%), Fe2O3 (11,1%), Al2O3 (7,5%), dan NiO (1,3%). Dengan membandingkan hasil ini dengan data-data penelitian sebelumnya, telah ditemukan bahwa batu permata Bio-Solar dapat diklasifikasikan sebagai jenis batu giok Vesuvianite. One of well-known gemstones in Aceh is called Bio-Solar. This gemstone is found a lot in Aceh. Nonetheless, the detail information of this gemstone is still limited. None knows if this gemstone can be classified as jade. This study has characterized this gemstone (Bio Solar) from Aceh using X-Ray Florescent (XRF). The results show that the Bio-Solar gemstone contains minerals of CaO (59.8%), SiO2 (19.7%), Fe2O3 (11.1%), Al2O3 (7.5%), and NiO (1.3%). By comparing this results to the available mineral data, we found that the Bio-Solar gemstone from Aceh can be classified as Vesuvianite jade. Keywords: Batu Giok, Bio Solar, Vesuvianite, XRF
Control of Corrosion Rate on A36 Black Plate Steel in Corrosive Medium Using Salam Leaf Extract Inhibitor Evi Yufita; Desy Fitriana; Zulfalina Zulfalina
Journal of Aceh Physics Society Volume 7, Number 2, May 2018
Publisher : PSI-Aceh

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Abstract

Pemanfaatan inhibitor organik untuk mengurangi laju korosi pada logam telah banyak diteliti karena ramah lingkungan dibandingkan dengan inhibitor anorganik. Dalam penelitian ini, ekstrak daun salam (Eugenia Polyantha (Wight.)Walp.) digunakan sebagai inhibitor untuk menghambat laju korosi pada baja plat hitam A36. Ekstrak daun salam digunakan sebagai inhibitor karena mengandung senyawa tannin dan flavonoid yang dapat menghambat laju korosi. Tujuan penelitian ini untuk mengetahui pengaruh dan efisiensi penambahan variasi volume inhibitor tersebut dalam medium korosif NaCl 3 % terhadap laju korosi pada baja plat hitam A36. Metode yang digunakan adalah kehilangan berat. Sampel direndam dalam larutan korosif yang dicampurkan dengan inhibitor. Dari hasil peneliti menunjukkan bahwa ekstrak daun salam mampu menghambat laju korosi. Nilai laju korosi terendah dan efisiensi tertinggi pada penambahan volume inhibitor 16 ml, masing-masing sebesar 0,0003 cm/tahun dan 99,80%. Organic inhibitors ultilization to reduce corrotion rate on metal have been widely studied due to more enfironmentally frendly compare to inorganic material. In this study, the extract of salam leaf (Eugenia Polyantha (Wight.) Walp.) was used as an inhibitor to reduce the corrosion rate on A36 black plate steel. Salam leaf extract is used as an inhibitor because it contains tannin and flavonoid compounds that can inhibit corrosion rate. The purpose of this study was to determine the effect and efficiency of adding variation of the inhibitor volume in a corrosive medium of 3% NaCl to the corrosion rate on A36 black plate steel. The method used is weight loss. The sample was immersed in a corrosive solution mixed with the inhibitor. From the results of the research show that the extract of Salam leaf can reduce corrosion rate. The lowest corrosion rate value and the highest efficiency at the addition of 16 ml inhibitor volume are 0.0003 cm/year and 99.80%, respectively. Keywords: Flavonoid, Inhibitor Effeciency, NaCl, Salam Leaf Extract, Tannin, Weight LossDaftar Pustaka Cicek, Volkan. 2014. Corrosion engeneering. Wiley. United State of America.Fatriah, Zulfalina, Evi yufita.2017.Pengaruh ekstrak daun trembesi sebagai inhibitor terhadap laju korosi pada baja plat hitam A36. J.Aceh Phys.Soc Vol.6, No.2 pp. 52-56. Jurusan Fisika Fakultas Matematika Ilmu Pengetahuan Alam Universitas Syiah Kuala.Indah wahyuutami. 2008. Efekfraksi air ekstrak etanol dalam daun salam terhadap penurunan kadar asam urat pada mancit putih jantang alurbalb-c yang di induksi dengan kalium oksonat. Skripsi. Universitas Muhammadiyah Surakarta.Rozanna Sri Irianty dan Khairat, 2013, Ekstrak Daun Pepaya sebagai Inhibitor Korosi pada Baja AISI 4041 dalam Medium Air Laut, Jurnal Teknobiologi, volume IV (2), RiauSupardi, Rahmat. 1997. Korosi. Tarsito. Bandung.Sari, M,D., Handani,S., Yetri,Y. 2013. Pengendalian laju korosi Baja St-37 dalam medium asam klorida dan natrium klorida menggunakan inhibitor ekstrak daun teh. Jurnal Fisika Fakultas MIPA. Vol.2 No.3. Universitas Andalas Padang.Yonna Ludiana dan Sri Handani, (2012). Pengaruh konsentrasi inhibitor ekstrak daunteh (Camelia Sinensis) terhadap laju korosi baja karbon schedule 40 grade BERW. Jurnal Fisika volume 1 No. 1 Universitas Andalas Padang.
Identification Content of the Red Dragon Fruit Extract Skin Using Fourier Transform Infrared (FTIR) and Phytochemistry Muhammad Ilham Noor; Evi Yufita; Zulfalina .
Journal of Aceh Physics Society Volume 5 Number 1, March 2016
Publisher : PSI-Aceh

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Abstract

Corrosion is a decline in the quality of the metal due to electrochemical reaction between the metal by a corrosive medium. One effort to reduce the rate of corrosion is by adding inhibitors. Organic inhibitors that can be used include antioxidants and vitamin C. To determine both the content of the test method is used Fourier Transform Infrared (FTIR) and phytochemicals. FTIR is a method to measure used to determine the group and the type of bonding of a compound based on the value of the wave number of a plant. Phytochemical screening is a test of the qualitative secondary metabolites biologically active compounds found in plants. In this study used a sample of red dragon fruit. The results of the analysis provide information regarding the types of biologically active compounds and levels of the active compound contained in the red dragon fruit.
Effect of Sintering Time on Superconducting Wire Bi-Pb-Sr-Ca-Cu-O With Dopant MgO Sheated Ag Using Powder in Tube Method Hariyati Lubis; Agung Imaduddin; Eddy Marlianto; Pius Sebleku; Eidi Sihombing
Journal of Aceh Physics Society Volume 7 Number 1, January 2018
Publisher : PSI-Aceh

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Abstract

Telah dilakukan penelitian mengenai variasi waktu proses sintering pada kawat superkonduktor Bi-Pb-Sr-Ca-Cu-O dopan MgO dengan selubung Ag. Bahan-bahan yang digunakan ialah Bismuth (III) Oksida, Timbal (IV) Oksida, Strontium Carbonate, Calcium Carbonate, Copper (II) Oksida dan Magnesium Oksida dengan tingkat kemurnian tinggi. Proses sintering dalam furnance dilakukan pada suhu konstan selama 30 jam dan 9 jam lalu didinginkan dalam tungku. Hasil karakterisasi X-Ray Diffraction dan search match v1.10, sampel kawat superkonduktor monofilamen Bi1.6Pb0.4Sr2Ca2Cu3O10+δ dan Bi1,6Pb0,4Ca1,95Mg0,05Cu3O10+δ dengan variasi waktu sintering masing-masing 30 jam dan 9 jam memiliki nilai intensitas sebesar 993,77cts dan 902,86 cts. Penambahan waktu sintering pada sampel superkonduktor mengakibatkan penurunan fraksi volume 2223 dengan masing-masing nilai fraksi volume sebesar 60% dan 59%, hal ini menunjukkan adanya impuritas berupa senyawa CuO. Parameter kisi diperoleh yaitu Orthorhombic dengan a=5,347 Å, b=5,416 Å dan c=30,67 Å. Hasil morfologi SEM menunjukkan permukaan homogenitas butir sampel terlihat cukup baik, dan terdistribusi secara acak. Pada sampel kawat superkonduktor monofilamen Bi1.6Pb0.4Sr2Ca1.95Mg0.05Cu3O10+δ dengan waktu sintering 30 jam menunjukkan Tconset=72 K dan Tczero=33 K. Sampel kawat superkonduktor monofilamen Bi1.6Pb0.4Sr2Ca1.95Mg0.05Cu3O10+δ dengan waktu sintering 9 jam menunjukkan Tconset=78 K dan Tczero=58 K. Variation of sintering time has been done in Bi-Pb-Sr-Ca-Cu-O superconducting wires dopant MgO using Ag-sheathed. The samples were prepared using highly pure powders of Bismuth (III) Oxide, Lead (IV) Oxide, Strontium Carbonate, Calcium Carbonate, Copper (II) Oxide and Magnesium Oxide. Sintered at a constant temperature for 30 h and 9 h then cooled in the furnace. The structure of the samples was studied by X-Ray Diffraction and search match v1.10. XRD patterns of Bi1.6Pb0.4Sr2Ca2Cu3O10+δ and Bi1,6Pb0,4Ca1,95Mg0,05Cu3O10+δ monofilament superconducting wires using variation of sintering time for 30 h and 9 h have intensity values of 993.77cts and 902.86 cts. The addition of sintering time to superconductor samples resulted decrease in the volume fraction of 2223 with each volume fraction value of 60% and 59% indicating of impurity phases present CuO compounds. The Orthorhombic structure with the lattice constants are calculated as a = 5,347 Å, b = 5,416 Å, and c = 30,67 Å. The surface morphology studied by SEM, show that surface homogeneity, each grain grows in random directions. For the prepared Bi1,6Pb0,4Ca1,95Mg0,05Cu3O10+δ monofilament superconducting wires sample with 30 h, the onset Tc is at 72 K and the resistivity drops to zero at 33 K. Sample of Bi1.6Pb0.4Sr2Ca1.95Mg0.05Cu3O10+δ δ monofilament superconducting wires with 9 h, the onset Tc is at 78 K and the resistivity drops to zero at 58 K. Keywords : BPSCCO superconducting wire, Sheated Ag, Dopant MgO, Sintering time DAFTAR PUSTAKAAbbas M.M., Abass L.K and Salman U., (2012), Influences of Sintering Time on the Tc of Bi2-xCuxPb0.3Sr2Ca2Cu3010+ High Temperature Superconductors, Energy Procedia 18, 215-224 Abbas, M.M., Abbas, L.K., Bahedh, H.S. 2015. Superconducting Properties of Bi2-SbxPb0,3Sr1,9Ba0,1Ca2Cu3O10+δ Compounds. Journal of Applied Science Research. 11. 22: 164-172Darsono, N., Imaduddin, A., Raju, K., Yoon, D.H., (2015), Synthesis and Characterization of Bi1.6Pb0.4Sr2Ca2Cu3O7 Superconducting Oxide by High-Energy Milling, J Supercond Nov Magn.E. Chew,. (2010), Superconducting Transformer Design And Construction, University of Canterbury, Christchurch, New Zealand. MarchHamadneh, I., Halim, S. A., dan Lee, C. K., (2006),  Characterization of Bi1.6Pb0.4Sr2Ca2Cu3Oy Ceramic Superconductor Prepared Via Coprecipitation Method at Different Sintering Time, J. Mater. Sci, 41: 5526-5530.Hermiz G.Y., Aljurani B.A., Beayaty M.A., (2014), Effect of Mn Substitution on the Superconducting Properties of Bi1.7Pb0,3Sr2Ca2-xMnxCu3O10+, International Journal Of Engineering and Advanced Technology (IJEAT). 3. 4: 213-217John R Hull, (2003), Applications of high-temperature superconductors in power technology, Reports on Progress in Physics, Volume 66, Number 11Lu, X.Y., Yi, D., Chen, H., Nagata, A. 2016. Effect of Sn, MgO and Ag2O mix-doping on the formation and superconducting properties of Bi-2223 Ag/tapes. Physics Procedia. 81: 129-132Meretliev Sh., Sadykov K.B., Berkeliev A., (2000), Doping of High Temperature Superconductors, Turk J Phy.24: 39-48Mohammed, N. H., Ramadhan A., Ali I. A., Ibrahim, I. H., dan Hassan, M. S, (2012), Optimizing the Preparation Conditions of Bi-2223 Superconducting Phase Using PbO and PbO2, Materials Sciences and Applications, 3: 224-233.Roumie, M., Marhaba, S., Awad R., Kork M., Hassan I., Mawassi R., (2014), Effect of Fe2O3 Nano-Oxide Addition on the Superconducting Properties of the (Bi,Pb)-2223 Phase, Journal of Supercond Nov Magn, 27: 143-153Serkan, A., (2008), Production of YBCO Superconductor Sample by Powder-In-Tube Method (PITM); and Effect of Cd and Ga Doping on the System, University, Department of Physics, Malatya-TurkeySharma, D., Kumar, R., Awana, V.P.S. 2013. DC and AC Susceptibility Study of Sol-Gel Synthesized Bi2Sr2CaCu2O8+x Superconductor. Ceramic International. 39:1143-1152
Material Selection Methodology in Oil and gas Refinery using Heat Material Balances and Flow Diagram Process Sofyan Yusuf
Journal of Aceh Physics Society Volume 6 Number 1, March 2017
Publisher : PSI-Aceh

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Abstract

Tulisan ini memuat tentang bagaimana melakukan seleksi material pada pengilangan minyak dan gas menggunakan neraca massa dan energi dan diagram alir proses. Seleksi material adalah salah satu dari tahapan utama dalam tahap perekayasaan yang memiliki pengaruh besar terhadap biaya konstruksi pabrik. Salah satu pendekatan terbaik untuk seleksi material pada kilang pengolahan minyak dan gas bumi adalah menggunakan data neraca massa dan energi serta diagram alir proses. Neraca massa dan energi mengandung data komposisi fluida dalam satuan fraksi mol dan beberapa data operasi seperti tekanan, suhu, fasa fluida dan sebagainya yang digunakan dalam proses pemilihan material. Metode seleksi material diawali dengan perhitungan laju korosi pada masing-masing aliran pada neraca massa dan energi. Setelah data laju korosi dihitung kemudian ditentukan besarnya corrosion allowance. Jika nilai corrosion allowance diatas 6.4 mm maka dipilih material yang tahan korosi seperti stainless steel, tetapi jika nilainya dibawah 6.4 mm maka dapat dipilih material baja karbon. Setelah material yang terbaik dipilih kemudian akan dibuat diagram seleksi material dengan menggunakan data diagram alir proses. This paper give us information about how to do a material selection for oil dan gas plant using heat and material balance and flow diagram process. Material selection is one of the main phases of engineering stage that has great impact on the cost of plant construction. One of the best approaches of material selection for oil and gas plant is analyzing heat material balance and flow diagram process data. Material selection shall be reliable, cost effective and also considering market availability and constructability aspects. Heat Material Balance (HMB) contains the composition of fluids in mole fraction and others operation data such as pressure, temperature, fluid phase, etc that used in material selection process. Material selection method begins with the calculation of corrosion rate in each of the streams in HMB. After the corrosion rates are calculated then corrosion allowance (CA) will be determined. If the CA higher than 6 mm then stainless steel material will be selected, but if CA under 6 mm then carbon steel material was selected. After the best materials are selected, the Material Selection Diagram will be developed using Flow Diagram Process. Keywords: Material selection; heat material balance; flow diagram process; corrosion rate; corrosion allowance.
Effect of Ceremai Leaf Extract (Phyllanthus acidus (L) Skeels) as Inhibitor Material on Corrosion Rate of Black Plate Steel (Base Plate) A36 Zulfalina Zulfalina; Nurrizka Nadia; Evi Yufita
Journal of Aceh Physics Society Volume 7, Number 2, May 2018
Publisher : PSI-Aceh

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Abstract

Penelitian tentang pengaruh ekstrak daun ceremai (Phyllanthus acidus (L) Skeels) sebagai bahan inhibitor terhadap laju korosi baja plat hitam (Base Plate) A36 dengan menggunakan metode weight loss telah dilakukan. Penelitian ini bertujuan untuk menghitung nilai laju korosi sampel baja A36 dan efesiensi inhibitor dari ekstrak etanol daun ceremai. Pembuatan inhibitor dilakukan dengan mengekstrak daun ceremai menggunakan metode maserasi. Hasil ekstrak dicampurkan ke dalam medium korosif NaCl 3% dengan variasi ekstrak 4, 8, 12, 16 dan 20 ml, kemudian dilakukan perendaman sampel baja plat hitam A36 yang berukuran 3x1,5x0,114 cm. Berdasarkan hasil penelitian didapatkan nilai laju korosi minimum pada perendaman dalam medium korosif NaCl 3% yang ditambahkan 16 ml inhibitor dengan waktu perendaman 14 hari yaitu 0,0339 cm/tahun dengan nilai efisiensi sebesar 88%. The research about effect of ceremai leaf extract (phyllanthus acidus (l) skeels) as inhibitor material on corrosion rate of black plate steel (Base Plate) A36 by using weight loss method has been done. This study aims to calculate the value of corrosion rate of A36 black plate steel samples and the efficiency of inhibitors from ethanol extract of ceremai leaf. Making the inhibitor is done by extracting the leaves of the ceremai using the maceration method. The extract was mixed into corrosive medium of NaCl 3% with variation of 4, 8, 12, 16 and 20 ml, and then immersion of A36 black plate steel sample 3x1.5x0.114 cm. Based on the result of the research, the minimum corrosive rate on soaking in corrosive medium of NaCl 3% when added of 16 ml inhibitor with immersion time for 14 d that is 0,0339 cm/year, and the efficiency value equal to 88 %. Keywords: Corrosion, Corrosion Rate, Efficiency, NaClReferensiAli, Farida, dkk. 2014. Pengaruh Waktu Perendaman dan Konsentrasi Ekstrak Daun Jambu Biji (Psidium guajava, Linn) sebagai Inhibitor Terhadap Laju Korosi Baja SS 304 dalam Larutan Garam, Jurusan Teknik Kimia Fakultas Teknik Universitas SriwijjayaAsdim. 2007. Penentuan Efisiensi Inhibisi Ekstrak Kulit Buah Manggis (Garcinia mangostana L) pada Reaksi Korosi Baja dalam Larutan Asam. Jurnal Gradien. 3 (2) : 273-276.Cicek, volkan. 2014. Corrosion Engineering. Wiley. USA.Fatriah. 2016. Pengaruh Ekstrak Daun Trembesi (Samanea Saman (Jacq.) Merr.) Sebagai Bahan Inhibitor Terhadap Laju Korosi Baja Plat Hitam (Base Plate) A36. J. Aceh.Phys. Soc. Vol. 6, No. 2.Favre. 1993. The Influence of Gallic Acid on the Reduction of Rust on Painted Steel Surface. Journal Corrosion Science 43.1483-1492.Kayadoe, Victor dan Rachel Turalely. 2016. Ekstrak Daun Nipah sebagai Inhibitor Korosi Baja Ss-304 Dalam Larutan H2SO4. Prosiding Seminar Nasional Kimia dan Pembelajarannya, ISBN : 978-602-0951-12-6 Jurusan Kimia FMIPA Universitas Negeri Surabaya.Priest. D. 1992. Measuring Corrosion Rates Fast. J. Chemical Engineering, vol : 2 no. 1.Rieger. 1992. Electrochemistry, 2nd ed. Chapman and Hall Inc. New York.Setiawan, Dalimartha. 1999. Atlas Tumbuhan Obat Indonesia Jilid 1, Jakarta : Trubus Agriwidy
Synthesis of Natural Hydroxyapatite from Aceh’s Bovine Bone Nurul Fadhilah; Irhamni Irhamni; Zulkarnain Jalil
Journal of Aceh Physics Society Volume 5 Number 2, September 2016
Publisher : PSI-Aceh

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Abstract

Telah dilakukan penelitian yang mengkaji tentang sintesis hidroksiapatit berbasis tulang sapi lokal Aceh. Kandungan kalsium (CaO) di dalam tulang sapi dapat dimanfaatkan untuk mensintesis hidroksiapatit. Pada penelitian ini, hidroksiapatit disintesis dari tulang sapi yang telah dicuci bersih dan dihilangkan dari lemak  dengan menggunakan NaOH. Tulang sapi dikeringkan dan dikalsinasi terlebih dahulu pada temperatur 1000oC selama 2 jam. Tulang sapi kering kemudian ditumbuk hingga dihasilkan serbuk. Untuk mendapatkan ukuran partikel yang seragam, serbuk tulang sapi dimilling dengan kecepatan putaran 250 rpm selama 5 jam sehingga dihasilkan serbuk tulang sapi murni yang berukuran nano. Kemudian serbuk dikarakterisasi menggunakan XRD (X-Ray Diffraction) untuk membuktikan terbentuknya fasa CaO. Serbuk CaO yang telah terbentuk disintesa menjadi hidroksiapatit menggunakan metode solid statereaction dengan cara menambah asam posfat. Selanjutnya, serbuk CaO dan asam posfat disintering pada temperatur 900oC selama 2 jam. Penentuan fasa hidroksiapatit ini dilakukan dengan melakukan pengujian XRD. Berdasarkan hasil pengujian XRD, fasa CaO dan hidroksiapatit telah berhasil terbentuk sempurna. The research that examines the synthesis hydroxyapatite of Aceh’s bovine bone has been done. Calcium oxide (CaO) in bovine bone can be used to synthesized hydroxyapatite. In this research, hydroxyapatite synthesized from bovine bone that washed clearly and removed from the fat with adding NaOH. Bovine bone dried and calcined first at temperature of 1000oC for 2 hours. Then, dried-bovine bone is granulated become a powder. For uniformity particle size, bovine bone powder was milled with a 250 rpm rotation speed for 5 hours to produce pure bovine bone powder in nano-sized. Then, the bovine bone powder was characterized using X-Ray Diffraction (XRD) to evidence that CaO phase has been formed. CaO powder will be syntehesized become hydroxyapatite using solid state reactiod method with adding phosphoric acid. Finally, powder CaO and phosphoric acid sintering at temperature of 900oC for 2 hours. Determination of hydroxyapatite phase is done by testing the XRD. Based on test results of XRD, CaO and hydroxyapatite phase has been successfully formed.
Utilization of GSM Module (Sim 900) Based Arduino-Uno for Alarm System and Remote Automatic Door Locking Fauzi Fauzi; Mahyuddin Mahyuddin; Kurnia Lahna
Journal of Aceh Physics Society Volume 7 Number 1, January 2018
Publisher : PSI-Aceh

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Abstract

Sebuah sistem alarm dan pengunci pintu otomatis jarak jauh untuk keamanan rumah telah dibuat. Otomatisasi kunci pintu rumah ini beroperasi dengan menggunakan perintah yang dikirimkan oleh pemilik rumah melalui pesan singkat melalui handphone sehingga keamanan rumah akan tetap dapat dikendalikan meski dari jarak yang jauh. Penelitian ini bertujuan untuk membangun otomatisasi rumah pintar yang mampu melakukan dua hal yakni mengunci pintu dan menyalakan alarm dengan menggunakan mikrokontroler Arduino-uno dan modul GSM. Pengontrolan secara otomatis tersebut cukup kompleks dan memerlukan berbagai komponen yang terintegrasi dengan kemampuan pembacaan masukan, pemrosesan data dan pengontrolan keluaran secara bersamaan dan terprogram. A remote door automatic alarm and door lock system for home security has been designed. This home door lock automation operates using commands sent by homeowners via short messages from handphone so that home security will remain controllable even from a long distance. This study aims to build smart home automation that can do two things: lock the door and turn on the alarm by using Arduino-uno microcontroller and GSM module. The automatic control is quite complex and requires a variety of integrated components with the ability to read input, data processing and control the output simultaneously and programmed. Keywords: Arduino, GSM, Automatic Doors, SMSRerefencesDepari, G.S. (1985). Belajar Teori dan Keterampilan Elektronika. Bandung: Armico Daryanto, 2005. Pengetahuan Teknik Elektronika. Erlangga. Jakarta.Session, Kendall Webster, 2003. 1001 Rangkaian Elektronika. PT. Elek Media Komputindo Kelompok Gramedia, Jakarta.Sustrisno, 1986, Elektronika Teori dan penerapanya. Penerbit ITB, Bandung 
Effect of Trembesi Leaf Extracts (Samanea saman(Jacq.) Merr) as Material Inhibitor against Black Steel Plate Corrosion Rate (Base Plate) A36 Fatriah Fatriah; Zulfalina Zulfalina; Evi Yufita
Journal of Aceh Physics Society Volume 6 Number 2, September 2017
Publisher : PSI-Aceh

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Abstract

 Telah dilakukan penelitian mengenai pengaruh ekstrak daun trembesi (Samanea Saman (Jacq.) Merr.) sebagai bahan inhibitor terhadap laju korosi baja plat hitam (Base Plate) A36. Ekstrak daun trembesi digunakan sebagai inhibitor karena mengandung senyawa tanin yang dapat menghambat laju korosi. Pada penelitian ini digunakan baja plat hitam A36 sebagai objek perendaman dan larutan NaCl 3% sebagai media korosif. Inhibitor ekstrak daun trembesi ditambahkan dalam medium korosif dengan variasi kosentrasi 2, 4, 6, 8, 10 dan 12 ml dengan lama perendaman baja plat hitam (A36) selama 168 jam. Perhitungan laju korosi  menggunakan metode weight loss. Dari hasil penelitian diperoleh nilai laju korosi terendah yaitu pada penambahan kosentrasi inhibitor 12 ml sebesar 0,006194 cm/tahun dan nilai laju korosi tertinggi yaitu tanpa penambahan inhibitor sebesar 0,02646 cm/tahun. Penurunan laju korosi seiring dengan penambahan kosentrasi inhibitor Kata Kunci: Tanin, Ekstrak Daun Trembesi, NaCl, Weight Loss, Efesiensi inhibis A research on the effect of trembesi leaf extracts (Samanea Saman (Jacq.) Merr.) has been done as an inhibitor material to the corrosion rate of black plate steel (Base Plate) A36. Trembesi leaf extract is used as an inhibitor because it contains tannin that can inhibit corrosion rate. Black plate steel (A36) is used as a sample and 3% NaCl solution as corrosive media. Trembesi leaf extract inhibitor was added in corrosive medium with concentration of 2, 4, 6, 8, 10 and 12 ml with long immersion of a sample for 168 hours. Calculation of corrosion rate is using weight loss method. the results obtained the lowest corrosion rate value is the addition of 12 ml inhibitor concentration of 0.006194 cm/year and the highest rate of corrosion rate that is without the addition of inhibitor of 0.02646 cm/year. Decrease in corrosion rate along with the addition of inhibitor concentration Keywords: Tanin, trembesi leaf extracts, NaCl, Weight Loss, Black plate steel, efficiency, inhibitorReferensiCicek, Volkan. 2014. Corrosion Engineering. Wiley. United States of America.Sari, M, D., Handani, S., Yetri, Y. 2013. Pengendalian Laju Korosi Baja St-37 Dalam Medium Asam Klorida Dan Natrium Klorida Menggunakan Inhibitor  Ekstrak           Daun Teh (Camelia sinensis). Jurnal Fisika Fakultas MIPA Vol. 2, No. 3. Universitas Andalas Padang.Sari, P, P., Rita, S W., Puspawati, M, N. 2015. Identifikasi Dan Uji Aktivitas Senyawa Tanin Dari (Samanea saman (Jacq.) Merr) Sebagai Antibakteri Escherichia Coli (E. Coli). Jurnal Kimia FMIPA Universitas Udayana. Bukit Jimbaran Bali.Setyowati, E, A, W., Ariani, D, R, S., Ashadi., Mulyani, B., Rahmawat, P, C., 2014. Skrining Fitokimia Dan Identifikasi Komponen Utama Ekstrak Metanol Kulit Durian (Durio Zibethinus Murr.) Varietas Petruk. Tugas Akhir Sarjana Program Studi Pendidikan Kimia Jurusan PMIPA FKIP UNS.Supardi, Rahmat. 1997. Korosi. Tarsito. Bandung
Investigation of Shallow Paleochannel in Banda Aceh based on Electrical Resistivity Tomography Muzakir Zainal; Muhammad Yanis; Umar Muksin; Nazli Ismail
Journal of Aceh Physics Society Volume 6 Number 1, March 2017
Publisher : PSI-Aceh

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Abstract

Pembentukan daratan pesisir sangat dipengaruhi oleh proses sedimentasi dari material hasil rombakan. Proses sedimentasi pada masa lampau dapat dikaji dengan mempelajari sungai purba sebagai media transportasi material. Survey geofisika metode electrical resistivty tomography dilakukan untuk investigasi sungai purba di Ulee Kareng Banda Aceh. Untuk memetakan sedimen dan geometri sungai purba, pengukuran electrical resistivity dilakukan di sepanjang dua lintasan dengan panjang 240 meter dan spasi elektroda 2 meter. Proses inversi model resistivitas 2D telah dilakukan pada masing – masing lintasan data yang terukur. Hasil electrical resistivity tomography mampu membedakan batas – batas antara setiap lapisan sedimen yang terendapkan di lokasi paleochannel. Sedimen paleochannel secara jelas diidentifikasi dari distribusi nilai resistivitas yang lebih tinggi (15.2–31.6 Ω.m). Berdasarkan interpretasi dari metode electrical resistivity tomography area persawahan merupakan lokasi sungai purba pada masa lampau. The formation of coastal area is influenced by sedimentation process. The sedimentation process along the coastal line in the past one can be explained by studying existence of paleochannels located around the area. Deposition of the sediment along the coast is carried by river activities in the past. We have investigated paleochannel structure in Ulee Kareng, Banda Aceh using electrical resistivity tomography survey. The measurements were performed along two profiles with 240 meters and 2 meters spacing between electrodes crossing the paddy. The method measured apparent resistivity data along the profiles. The 2D resistivity models were inverted from the apparent resistivity data using Res2Div program. The inverted models clearly show indication of paleochannel structure based on distribution of resistivity values within the subsurface. The paleochannel area was characterize by high resistivity i.e. 15.2–31.6 Ω.m.

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