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PENCAPAIAN PERTUMBUHAN PADA BALITA GIZI BURUK SELAMA MENGIKUTI PEMULIHAN DI KLINIK GIZI BOGOR Muljati, Sri; Sihadi, Sihadi; Amelia, Amelia; Salimar, Salimar; Rahmawati, Rika
Jurnal Penelitian Gizi dan Makanan Vol 29, No 1 (2006)
Publisher : Jurnal Penelitian Gizi dan Makanan

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Growth Attainment of Severe Wasted Children Under Five Years Old Attending Out Patient Nutrition Clinic In Bogor.Background: Growth failure among children under five years old is widely known to cause high prevalence of severe malnutrition in Indonesia (3%). Treatment of those suffering from severe wasted children is done in out patient clinic in Bogor for six mounth period.Objective: To study growth attainment of severe wasting children and its related factors.Methods: A total of 536 children attending the clinic from 2001-2005 was selected according to inclusion criteria, some variables related to growth was also collected. They were divided into two groups who attained or not based on growth trajectory and analyzed by using Cox regessing model.Result: 20% children suffering from severe wasting attained growth after 6 months of treatment, while the rest failed. Growth attainment varied among children. Children aged less than 6 months, suffering less frequent influenza and having sign and symptom of severe malnutrition is was likely to attain growth based on growth trajectory.Recommendltlon: A more intensive care of severe wasted children is needed, which includes increasing compliance of food supplement consumption and improving awarenees of sign and symptoms of severe malnutrition.Keywords: growth trajectory, severe wasting
Aplikasi Pengamanan Data Menggunakan Algoritma Steganografi Discrete Cosine Transform dan Kriptografi AES 128 BIT pada SMK PGRI 15 Jakarta Rahmawati, Rika; Rahardjo, Dani
Jurnal Teknik Informatika dan Sistem Informasi Vol 2 No 1 (2016): JuTISI
Publisher : Maranatha University Press

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SMK PGRI 15 Jakarta has a lot of important documents such as financial reports, document collaboration and other important papers. Document security is still not done correctly so that the stored information is still very vulnerable to unknown, retrieved and manipulated by parties who are not entitled to that information. One way that information safe is to use steganography techniques. So the objective of this thesis is to build desktop-based applications to secure the data (information) in order to be secret by inserting secret messages that have been encrypted in the form of an image file. Steganography algorithm used is DCT (Discrete Cosine Transform). Data that has been inserted into the previous image is already in encrypted with 128 bit AES algorithm, so that data confidentiality is guaranteed. Based on the results of experiments conducted in this study, File Embedded processors who do have an average completion time of 432.3 seconds, and managed to get a good quality Steganography with the average value of the relatively small MSE of 1.38 dB and flat -rata PSNR of 47.66 dB. While the process Extract Files that do have an average completion time of 139,6detik, as well as the success rate of 100%. By using Steganography DCT (Discrete Cosine Transform) and Cryptographic techniques AES (Advanced Encryption Standard) 128 bit is very helpful in maintaining the confidentiality of documents that are not easily read by people who are not entitled to the document. So the security issues faced by SMK PGRI 15 Jakarta can be resolved.
Sintesis Nanokomposit g-Al2O3-Fe2O3 untuk Adsorpsi wj Logam Cr(VI) Rahmawati, Rika; Suhendar, Dede
JURNAL ISTEK Vol 8, No 1 (2014): ISTEK
Publisher : JURNAL ISTEK

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wp Penanganan limbah yang mengandung logam berat sering kali memerlukan biaya yang tidak murah. Penelitian ini bertujuan untuk mensintesis adsorben berskala nanometer berbahan murah dan metode sintesis dan uji aplikasinya yang sangat sederhana, yakni nanokomposit g-Al2O3-Fe2O3 untuk adsorben Cr(VI). Larutan Al(OH)3 dicampur dengan larutan amoniak sampai pH 4, kemudian ke dalamnya dicampurkan sukrosa dan FeCl3 sampai homogen (perbandingan mol Al(OH)3 : 0,25 FeCl3 : 0,33). Campuran tersebut dipanaskan pada suhu 120 °C sambil pengadukan sampai volumenya menjadi sekitar 2/3-nya, kemudian dipanaskan kembali pada 200 °C selama 24 jam. Padatan berbentuk butiran-butiran berwarna coklat yang dihasilkan kemudian digerus halus dan dicampur dengan kerosen secara homogen. Campuran diuapkan sampai kerosen habis. Serbuk halus berwarna coklat yang dihasilkan kemudian dikalsinasi pada suhu 800 °C selama 4 jam. Berdasarkan hasil analisis XRD diperoleh bahwa sintesis tersebut menghasilkan produk campuran yang didominasi fasa g-Al2O3 dengan kristalinitas rendah yang menunjukkan terbentuknya nanokomposit. Larutan K2Cr2O7 telah digunakan sebagai model larutan yang mengandung Cr(VI) untuk pengujian sifat adsorben nanokomposit tersebut. 2 gram nanokomposit diaduk dengan larutan K2Cr2O7 dengan konsentrasi Cr(VI) 56,7 ppm pada suasana asam (pH 2) sebanyak 50 mL pada variasi waktu 1 – 24 jam. Hasil kontak menunjukkan bahwa lamanya waktu kontak tidak memberikan perbedaan yang signifikan namun secara keseluruhan diperoleh rata-rata adsorpsi Cr(VI) sekitar 82,5% setelah pengadukan awal selama 1 jam. Oleh karena itu dapat disimpulkan bahwa nanokomposit g-Al2O3-Fe2O3 sangat efektif dan efisien sebagai adsorben zat pencemar Cr(VI) karena biaya bahan dan sintesisnya sangat murah, sifat mengadsorpsinya cepat, dan mengadsorpsi cukup banyak Cr(VI).
Analisis Faktor Penyebab Risiko Keselamatan dan Kesehatan Kerja (K3) pada Proses Kegiatan Penggantian Oli dan Seal Packing pada Trafo (Studi Kasus: PT X, 2015) Rahmawati, Rika
Jurnal Ilmiah Universitas Bakrie Vol 3, No 03 (2015): Agustus 2015
Publisher : Universitas Bakrie

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Penelitian ini bertujuan untuk mengetahui faktor penyebab risiko Keselamatan dan Kesehatan Kerja (K3) pada proses penggantian oli dan seal packing pada trafo di PT X tahun 2015 dengan menggunakan metode Failure Mode and Effect Analysis (FMEA) dan Fault-Tree Analysis (FTA). Tahapan proses yang diteliti adalah tahapan proses yang memiliki risiko sisa dengan tingkatan moderate di mana tingkat risiko tersebut membutuhkan pengendalian tambahan untuk menurunkan tingkat risikonya. Hasil penelitian adalah berupa urutan prioritas penanganan risiko Keselamatan dan Kesehatan Kerja (K3) pada tahapan proses yang diteliti, faktor penyebab risiko, dan usulan pengendalian risiko yang dapat menjadi dasar pertimbangan bagi program pengendalian risiko di PT X.Kata kunci: Penilaian Risiko, Failure Mode and Effect Analysis, Risk PriorityNumber, Fault-Tree Analysis, MOCUS. ABSTRACT   This research aims to discover the causative factor of Occupational Safety and Health (OSH) in the oil and seal packing replacement process on the transformator at PT X 2015 using the Failure Mode and Effect Analysis (FMEA) and Fault-Tree analysis (FTA). The researched process stages are the stage of process that its residual risk is at moderate level which is this process stage will require additional controls to reduce the existing risk level. The results of this research are a risk control priority order of the Occupational Safety and Health (OSH) on the process stage that being researched, the causative factor of those risks, and the proposed risk control which can be one of consideration of risk control program in PT X. Keywords: Risk Assessment, Failure Mode and Effect Analysis, Risk Priority Number, Fault-Tree Analysis, MOCUS.  DAFTAR PUSTAKA  American Institute of Chemical Engineers, Inc. (2010). A Practical Approach to Hazard Identification for Operations and Maintenance Workers. Hoboken: John Wiley & Sons, Inc.Crawley, F., & Tyler, B. (2003). Hazard Identification Methods. Rugby: Institution of Chemichal Engineers (IChemE). Dyadem Press. (2003). Guidelines for Failure Mode and Effect Analysis for Automotive, Aerosapce and General Manufacturing Industries. Ontario: CRC Press. Ericson II, C. (2016). Hazard Analysis Techniques for System Safety. New Jersey: John Wiley & Sons, Inc. Gusani, D. A. (2012). Analisis Risiko Keselamatan dan kesehatan Kerja di Penyamakan Kulit X Tahun 2012. Depok, Tangerang, Indonesia: Universitas Indonesia. Hadipoetro, S. (2014). Manajemen Komprehensif Keselamatan Kerja. (S. Hadipoetro, & A. Kadir, Penyunt.) Jakarta: Yayasan Patra Tabiyyah Nusantara. Hughes, P., & Ferrett, E. (2009). Introduction to Health and Safety at Work (4th ed.). Oxford: Elsevier Limited. International Labour Organization. (1998). Encyclopedia of Occupational Helath and Safet (4th ed., Vol. III). (J. M. Stellman, Penyunt.) Geneva: International Labour Office. International Labour Organization. (2013). International Labour Organization. Dipetik Juli 10, 2015, dari Keselamatan dan Kesehatan Kerja - ILO: http://www.ilo.org/wcmsp5/groups/public/---asia/---ro-bangkok/---ilo-jakarta/documents/publication/wcms_237650.pdf International Organization for Standardization. (2004, November 15). ISO - Publications and e-products. Dipetik Agustus 13, 2015, dari ISO - International Organization for Standardization: http://www.iso.org/iso/catalogue_detail?csnumber=31807 Kececioglu, D. (2002). Reliability Engineering Handbook (Vol. 2). Lancaster: DEStech Publication. Kustiyaningsih, F. (2011). Penentuan Prioritas Penanganan Kecelakaan kerja di PT GE Lighting Indonesia dengan Metode Failure Mode and Effect Analysis (FMEA). Surakarta: Universitas Sebelas Maret. Occupational Health and Safety Assessment Series Project Group. (2007, Juli). OHSAS 18001:2007. British Standards. Rae, A. (2007). Acceptable Residual Risk - Principles, Philosophies and Practicalities. The 2nd IET International Conference on System Safety 2007 (hal. 26-31). London: IET. Sower, V. (2011). Essentials of Quality. Hoboken: John Wiley & Sons, Inc. Standards Australia/Standards New Zealand. (2006). Risk Management Guidelines Companion to AS?NZS 4360:2004. Sydney: Standards Australia International Ltd. Sucipto, C. D. (2014). Keselamatan dan Kesehatan Kerja. Yogyakarta: Gosyen Publising. U.S. Nuclear Regulatory Commission. (1981). Fault Tree Handbook. Washington, DC: U.S. Nuclear Regulatory Commission. Vesely, B. (2002). Fault Tree Handbook with Aerospace Applications (1.1 ed.). NASA. Wilson, L., McCutcheon, D., & Buchanan, M. (2003). Industrial Safety and Risk Management (1st ed.). Edmonton, Alberta: Industrial Safety and Loss Management Program, Faculty of Engineering, University of Alberta.
DESAIN DIDAKTIS BERBASIS MODEL INKUIRI UNTUK MENGEMBANGKAN KEMAMPUAN PEMECAHAN MASALAH MATEMATIS Rahmawati, Rika; Azizah, Isnaini Nur
MaPan : Jurnal Matematika dan Pembelajaran Vol 6, No 2 (2018): DECEMBER
Publisher : Jurusan Pendidikan Matematika

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Abstrak:Penelitian ini bertujuan untuk menghasilkan suatu produk pengembangan dalam bentuk desain didaktis dan mengetahui kemampuan pemecahan masalah matematis siswa. Data diperoleh dari wawancara, observasi dan tes kemampuan pemecahan masalah. Berdasarkan hasil uji coba lapangan nilai rata-rata sebesar 74,2% dan tingkat kelulusan 76,19%. Hasil tertinggi dari aspek pemecahan masalah adalah memahami masalah 90,48% dan nilai terendah adalah memeriksa kembali sebesar 56,55%. Kesimpulan penelitian ini bahwa hasil posttest menunjukkan indikator memahami masalah sudah baik artinya siswa mampu memahami masalah dengan menuliskan apa yang diketahui dan ditanyakan. Namun, pada indikator memeriksa kembali diperoleh presentase terendah, karena siswa jarang memeriksa kembali jawaban yang telah ditulis.Abstract:The research aims to create a developmental product in the form of didactical design in order to know the students’ ability of mathematical problem solving. The data were obtained from interview, observation, and problem solving skill test. Based on the results of field try-out, it was obtained the mean score of 74% with achievement level of 76.19%. The highest problem solving aspect was understanding the problem with the score of 90.48% and the lowest score was rechecking skill with the score of 56.55%. Based on the findings, the posttest results show that the indicator of understanding the problem is good, it means that the students are able to understand the problem by writing what they know and what is being asked, but the indicator of rechecking gets lowest presentation score because the students rarely recheck their written answers.
DIVERSITY OF RED ALGAE (RHODOPHYTA) ON MANGROVE ECOSYSTEM IN EKAS VILLAGES, EAST LOMBOK DISTRICT Gazhali, Mursal; Rahmawati, Rika; Puji Astuti, Sri; Sukiman, Sukiman
Fish Scientiae Vol 8, No 1 (2018): Fish Scientiae, Vol.1, No.1, Juni 2018
Publisher : Universitas Lambung Mangkurat

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Mangrove ecosystem is a unique ecosystem with a mix of marine and terrestrial environment. Mangrove forests provide food and nutrients for other organisms such as fish, crustaceans, and algae. Red algae play an important role in maintaining the balance of ecosystems and food chains. This study aims to determine the types, morphological characteristics and key identification, the relationship of red algae types and substrate types to the ecosystem of mangrove forest in Dusun Ekas. This research is explorative descriptive by using purposive sampling method at 5 stations. Based on the results of the red algae study obtained as many as 14 species are: Bostrychia sp., B. radicans, B. tenella, Chondria sp., Laurencia sp., Polysiphonia sp., Murrayella sp., C. Leprieurii, C. Monostica, Gelidium sp ., Gelidium crinale, Catenella caespitosa, Catenella nippae and Catenella sp. Characteristics of the talus were found to have a cylindrical talus and some like leaves (blade). Red algae (Rhodophyta) found more in the station that dominated by Soneratia alba species. Ekosistem mangrove merupakan ekosistem yang unik dengan perpaduan pengaruh lingkungan laut dan daratan. Hutan mangrove menyediakan sumber makanan dan nutrisi untuk organisme lain seperti ikan, crustacea, dan alga. Alga merah berperan penting  menjaga keseimbangan ekosistem dan rantai makanan. Penelitian ini bertujuan untuk mengetahui jenis-jenis, ciri morfologi dan kunci identifikasi, hubungan jenis alga merah dan jenis substratnya pada ekosistem hutan mangrove di Dusun Ekas. Penelitin ini bersifat deskriptif eksploratif dengan menggunakan  metode purposive sampling pada 5 stasiun. Berdasarkan hasil penelitian alga merah yang diperoleh sebanyak 14 spesies yaitu: Bostrychia sp., B. radicans, B. tenella, Chondria sp., Laurencia sp., Polysiphonia sp., Murrayella sp., C. Leprieurii, C. Monostica, Gelidium sp., Gelidium crinale, Catenella caespitosa, Catenella nippae dan Catenella sp. Karakteristik talus yang ditemukan ada yang memiliki talus silindris dan ada yang seperti daun (blade). Alga merah (Rhodophyta) yang ditemukan lebih banyak pada stasiun yang memiliki mangrove jenis Soneratia alba.