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INDONESIA
Jurnal Matematika Sains dan Teknologi
Published by Universitas Terbuka
ISSN : 14111934     EISSN : 24429147     DOI : -
Core Subject : Education, Agriculture,
Agriculture, Biological Sciences & Forestry Mathematics Other
Merupakan media informasi dan komunikasi para praktisi, peneliti, dan akademisi yang berkecimpung dan menaruh minat serta perhatian pada pengembangan Matematika, ilmu pengetahuan dan teknologi. Diterbitkan oleh Lembaga Penelitian dan Pengabdian kepada Masyarakat, Universitas Terbuka.
Arjuna Subject : -
Articles 403 Documents
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APLIKASI JARINGAN SYARAF TIRUAN UNTUK MENGENALI TULISAN TANGAN HURUF A, B, C, DAN D PADA JAWABAN SOAL PILIHAN GANDA (Studi Eksplorasi Pengembangan Pengolahan Lembar Jawaban Ujian Soal Pilihan Ganda di Universitas Terbuka) Aprijani, Dwi Astuti; Sufandi, Unggul Utan
Jurnal Matematika Sains dan Teknologi Vol 12 No 1 (2011)
Publisher : LPPM Universitas Terbuka

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Abstract

Artificial Neural Network (ANN) can be applied to recognice pattern, particularly at the stage of data classification. This study used a multilayer perceptron backpropagation ANN, an unsupervised learning algorithm, to recognize the pattern of uppercase handwriting on the answer sheet of multiple-choice exams. The application of this network involves mapping a set of input against a reference set of outputs. In this research, ANN was trained using 8000 handwritten uppercase characters (A, B, C, and D) consisting of 6000 training data characters (1500 characters for each letter) and 2000 testing data characters (500 characters for each letter). The result showed that for the most optimal performance, the architecture and network parameters were 10 neurons in hidden layer, learning rate of 0.1 and 3000 iteration times. The accuracies of the result using the optimal network architecture and parameters were 90.28% for training data and 87.35% for testing data.
PROFIL ASAM AMINO DAN ASAM LEMAK PADA TERIPANG PASIR (HOLOTHURIA SCABRA) OLAHAN BELITUNG Ridhowati, Sherly; Asnani, Asnani
Jurnal Matematika Sains dan Teknologi Vol 16 No 2 (2015)
Publisher : LPPM Universitas Terbuka

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Abstract

Holothuria scabra is potentially marine resource and has an economic value. The research aim was: measuring the amino acid and fatty acids of two kinds of sandfish treatments for food. This research used two types of sea cucumber, sandfish A (smoked and dried) and sandfish B (dried). Both of these sandfish had a different profile of total amino acids  and  fatty acids. Sandfish A has a total amino acid of 40,64% (w / w) and fatty acid by 15,72% (w / w), while sandfish amino acid B has a total of 32,41% (w / w) and fatty acids by 11,52% (w / w). In terms of the composition of amino acids and fatty acids both types of sandfish have a potential as a functional food. Teripang pasir Holothuria scabra merupakan sumber daya laut potensial dan bernilai ekonomis. Tujuan penelitian adalah mengukur komposisi asam amino dan asam lemak pada A. Teripang yang diasap dan dikeringkan dan B. Teripang yang hanya dikeringkan. ini menggunakan dua jenis teripang, yaitu teripang A (diasapkan dan dikeringkan) dan teripang B (dikeringkan). Kedua teripang ini memiliki profil komposisi asam amino total dan asam lemak yang berbeda. Teripang A memiliki total asam amino sebesar 40,64% (b/b) dan asam lemak sebesar 15,72% (b/b), sedangkan teripang B memiliki asam amino total 32,41% (b/b) dan asam lemak sebesar 11,52% (b/b). Dari segi komposisi asam amino dan asam lemak kedua jenis teripang maka teripang A dan B berpotensi sebagai pangan fungsional.  
BENTUK NORMAL SMITH DAN MATRIKS BAIK KIRI/KANAN Yumiati, Yumiati
Jurnal Matematika Sains dan Teknologi Vol 8 No 2 (2007)
Publisher : LPPM Universitas Terbuka

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Abstract

The Smith normal form and left good matrix have been known in matrix theorem. Any matrix over the principal ideal ring has a Smith normal form. The Smith normal form of a matrix has many applications on various fields such as a solution of Diophantin linear equation and differential equation system. Furthermore, a matrix A with entries in a commutative ring R with unity is left good if for every vector x, the ideal áxAñ is the same as the ideal áAñ. This paper discusses the relation between the Smith normal form and left good matrix. The relation is as the following: matrix A with entries in principal ideal ring of size m by n, with m < n, has Smith normal form [Im, O] if only if A is a left good matrix.
UJI PERUBAHAN RATA-RATA SUHU UDARA DAN CURAH HUJAN DI KOTA PANGKALPINANG Fadholi, Akhmad
Jurnal Matematika Sains dan Teknologi Vol 14 No 1 (2013)
Publisher : LPPM Universitas Terbuka

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Abstract

Climate change is an accumulation of some climate elements change in the long term. In everyday life, enabling environmental changes caused climate change. These changes can be seen from the changes in the climate elements, such as temperature and rainfall these elements are influence on people's activities. However, the changes need to be analyzed and tested. Climate change (temperature and precipitation) in Pangkalpinang was identified from changes in the average of a period, through hypothesis testing. The analysis showed that in 2000-2011 upward trend for the average daily temperature was 0,0292 OC/year, upward trend for the minimum air temperature was 0,0365 OC/year, while the maximum temperatures have tended to fall at a rate of decrease of 0,01095 OC/years. Total annual rainfall in Pangkalpinang during 1981-2011 ranged from 1505,9 mm to 3444,3 mm. The average amount of annual rainfall in Pangkalpinang is 2450,5 mm/year. Test results change in average rainfall showed no change on average. Perubahan iklim merupakan akumulasi dari perubahan beberapa usur iklim dalam jangka waktu yang lama. Dalam kehidupan sehari-hari, perubahan lingkungan memungkinkan memicu perubahan iklim. Perubahan ini dapat terlihat dari perubahan unsur-unsur iklim tersebut, antara lain suhu udara dan curah hujan. Unsur-unsur ini sangat berpengaruh dalam aktivitas penduduk. Namun, perubahan yang terjadi perlu dianalisis dan diuji dengan hipotesis ada tidaknya perubahan dan tingkat signifikansinya. Perubahan iklim (suhu udara dan curah hujan) di Pangkalpinang diidentifikasi dari perubahan rata-rata suatu periode, melalui uji hipotesis dan taraf signifikansinya. Hasil analisis menunjukkan bahwa dalam periode tahun 2000-2011 kecenderungan naik untuk suhu rata-rata harian sebesar 0,0292 OC/tahun, kecenderungan naik untuk suhu udara minimum sebesar 0,0365 OC/tahun, sedangkan suhu udara maksimum mempunyai kecenderungan turun dengan laju penurunan sebesar 0,01095 OC/tahun. Jumlah curah hujan tahunan di Pangkalpinang selama tahun 1981-2011 berkisar antara 1505,9 mm hingga 3444,3 mm. Rata-rata jumlah curah hujan tahunan di Pangkalpinang adalah 2450,5 mm/tahun. Hasil uji perubahan rata-rata hujan menunjukkan tidak terjadi perubahan rata-rata.
DAYA TERIMA MINUMAN FUNGSIONAL BERBASIS KLOROFIL DARI RUMPUT PAHIT (ANOXOPUS COMPRESSUS [SCWARTZ] BEAUV) DAN ANTOSIANIN DARI UBI JALAR UNGU (IPOMOEA BATATAS L.) Alsuhendra, Alsuhendra; Ridawati, Ridawati
Jurnal Matematika Sains dan Teknologi Vol 17 No 2 (2016)
Publisher : LPPM Universitas Terbuka

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Abstract

A functional beverage made of chlorophyll extract from bitter grass and anthocyanin from purple sweet potato was formulated and evaluated. Chlorophyll was extracted using of NaHCO3solution with a concentrations of 0.1% (w / v) and then was stabilized with Cu2+ ions through the addition of CuSO4 as much as 100 mg Cu2+/L chlorophyll extract. Meanwhile, anthocyanin was extracted using a mixture of water and 25% acetic acid at a ratio of 30:0.5. Functional beverage was prepared by blending different ratios of chlorophyll and anthocyanin extracts(1: 1, 1: 2 and 1: 3). To increase the acceptance of the panelists, honey, banana flavorand menthol flavorwas added into the beverages. Sensory characteristic was evaluated by 28 panelists using hedonic test. Hedonic test found that the three types of functional beverages has a acceptance score between 3.4-3.8 or in the range rather like to like, both for the aspect of color, flavor, and aroma (p > 0.05). It can beconcluded that the bitter grass and purple sweet potato can be used as raw material in making of functional beverages. Penelitian ini bertujuan untuk mempelajari daya terima minuman fungsional kaya antioksidan dari ekstrak klorofil rumput pahit dan antosianin ubi jalar ungu. Penelitian dilaksanakan pada bulan Juni-Agustus 2016 di Laboratorium Rekayasa dan Analisis Boga, Fakultas Teknik UNJ. Ekstraksi klorofil dari rumput pahit dilakukan dengan menggunakan larutan NaHCO3 pada konsentrasi 0.1% (b/v). Ekstrak klorofil tersebut selanjutnya ditambah dengan ion Cu2+ dalam bentuk CuSO4 sebanyak 100 mg Cu2+/L ekstrak klorofil rumput pahit untuk mendapatkan ekstrak klorofil yang lebih stabil. Sementara itu, ekstraksi antosianin dari ubi jalar ungu dilakukan dengan menggunakan pelarut air dan asam asetat 25% pada perbandingan 30:0.5. Ekstrak klorofil dan antosianin kemudian dicampur dengan perbandingan 1:1, 1:2, dan 1:3 untuk mendapatkan tiga minuman fungsional. Agar dapat diterima panelis, ke dalam campuran tersebut ditambahkan pemanis madu serta flavor pisang dan menthol. Minuman yang dihasilkan selanjutnya dinilai oleh 28 orang panelis agak terlatih dengan menggunakan uji organoleptik (uji hedonik). Hasil uji organoleotik memperlihatkan bahwa ketiga jenis minuman fungsional memiliki tingkat penerimaan agak suka hingga suka (skor 3.4-3.8) untuk aspek warna, rasa, dan aroma. Tidak ada perbedaan nyata tingkat penerimaan panelis terhadap warna, rasa, dan aroma untuk ketiga jenis minuman tersebut. Dengan demikian, dapat dinyatakan bahwa rumput pahit dan ubi jalar ungu dapat digunakan sebagai bahan baku dalam pembuatan minuman fungsional.
KANDUNGAN ANTIOKSIDAN BEBERAPA LALAPAN Latif, Amril
Jurnal Matematika Sains dan Teknologi Vol 7 No 2 (2006)
Publisher : LPPM Universitas Terbuka

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Abstract

The product of fat oxidation on food has a significant effect towards human’s health, especially those who often consume it. It has been known for long time that vegetables, fruits, and fish have an ability to stifle Free Radical through the activities of antioxidant belonged to them. Among some kinds of antioxidant, natural antioxidant is the one which does not have any side-effects. This research is aimed to know the ability of antioxidant consisted in kemangi leaves, kemangi, rende, poh-pohan, and lettuce to stifle Free Radical.  Based on the result of spectrophotometer test towards those dishes of raw vegetables (lalapan), kemang leaves have the most antioxidant with 0,488 absorption, followed by rende leaves with 0,394 absorption, kemangi leaves with 0,326 absorption, poh-pohan leaves with 0,176 absorption, and lettuce with 0,1635 absorption. Based on the spectrum analysis, it can be seen that lettuce leaves have more effective antioxidant to stifle Free Radical.
PENGENDALI POINTER DENGAN GAZE TRACKING MENGGUNAKAN METODE HAAR CLASSIFIER SEBAGAI ALAT BANTU PRESENTASI (EYE POINTER) Satriyanto, Edi; Ardilla, Fernando; Agustriany Lubis, Risa Indah
Jurnal Matematika Sains dan Teknologi Vol 11 No 2 (2010)
Publisher : LPPM Universitas Terbuka

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The application that builded in this research is a pointer controller using eye movement (eye pointer). This application is one of image processing applications, where the users just have to move their eye to control the computer pointer. This eye pointer is expected able to assist the usage of manual pointer during the presentation. Since the title of this research is using gaze tracking that follow the eye movement, so that is important to detect the center of the pupil. To track the gaze, it is necessary to detect the center of the pupil if the eye image is from the input camera. The gaze tracking is detected using the three-step hierarchy system. First, motion detection, object (eye) detection, and then pupil detection. For motion detection, the used method is identify the movement by dynamic compare the pixel ago by current pixel at t time. The eye region is detected using the Haar-Like Feature Classifier, where the sistem must be trained first to get the cascade classifier that allow the sistem to detect the object in each frame that captured by camera. The center of pupil is detect using integral projection.The final step is mapping the position of center of pupil to the screen of monitor using comparison scale between eye resolution with screen resolution. When detecting the eye gaze on the screen, the information (the distance and angle between eyes and a screen) is necessary to compute pointing coordinates on the screen. In this research, the accuracy of this application is equal to 80% at eye movement with speed 1-2 second. And the optimum mean value is between 5 and 10. The optimum distance of user and the webcam is 40 cm from webcam.
PERAN KELUARGA DAN KEBIJAKAN PEMERINTAH KOTA PALANGKA RAYA DALAM PENGELOLAAN SAMPAH RUMAH TANGGA Kusma Wijaya, Dody Ariyantho
Jurnal Matematika Sains dan Teknologi Vol 18 No 1 (2017)
Publisher : LPPM Universitas Terbuka

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This research study the role of Family and Government Policy of Palangka Raya in Household Waste Managementin order to see whowas the most responsible for decision-makers in the process of waste management in households, and examines the role of families in the process of waste management before disposal into the trash. Data collection was done through observation and interview on the studied variables. The research was conducted in the district of Pahandut, district of Jekan Raya and district of Sebangau Palangka Raya in April till June 2011. The Source of data or respondents in the research community is engaged in managing and disposing of garbage. The community  is a society of each chosen houshold. Sampling was done purposively stratified. The results showed that the head of the family was instrumental in the process of garbage disposal. Garbage disposal decision makers is the father of 68.9% (31 respondents) and the mothers of 31,1% (14 respondents). In the waste management at household level was the comparison between wet waste and dry waste that is equal to ⅓ most was 54% (7 respondents. This indicates that the household waste produced is a dry waste. Penelitian ini bertujuan untuk mengetahui peran keluarga dan kebijakan pemerintah Kota Palangka Raya dalam pengelolaan sampah rumah tangga agar dapat melihat siapa yang paling berperan sebagai pengambil keputusan dalam proses pengelolaan sampah di dalam rumah tangga, serta mengkaji peranan keluarga dalam proses pengelolaan sampah sebelum dibuang ke tempat sampah. Pengumpulan data dilakukan melalui pengamatan atau observasi (observation) dan wawancara (interview) terhadap variabel yang diteliti. Penelitian ini dilaksanakan di Kecamatan Pahandut, Kecamatan Jekan Raya dan Kecamatan Sebangau Kota Palangka Raya pada bulan April hingga bulan Juni 2011. Sumber data atau responden dalam penelitian adalah masyarakat yang terlibat dalam kegiatan pengelolaan dan pembuangan sampah. Masyarakat yang dimaksud adalah masyarakat dari masing-masing rumah tangga terpilih. Pengambilan sampel dilakukan secara purposive berstrata. Hasil penelitian menunjukkan bahwa kepala keluarga sangat berperan dalam proses pembuangan sampah, pengambil keputusan pembuangan sampah adalah Bapak sebesar 68,9% (31 responden) dan Ibu sebesar 31,1% (14 responden), Dalam pengelolaan sampah di tingkat rumah tangga ternyata perbandingan antara sampah basah dan sampah kering terbanyak adalah ⅓ yaitu sebesar 54% (7 responden). Hal ini menunjukkan bahwa sampah rumah tangga yang dihasilkan adalah berupa sampah kering.  
EKSPLORASI HABITAT BAKUNG PUTIH (Crinum asiaticum L.) UNTUK MENDAPATKAN KADAR GALANTAMIN PADA KETINGGIAN TEMPAT BERBEDA Estu, Dewi; Irwanto, Rina Ratnasih
Jurnal Matematika Sains dan Teknologi Vol 9 No 2 (2008)
Publisher : LPPM Universitas Terbuka

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Abstract

White lily, Crinum asiaticum L (Amaryllidaceae) produce secondary metabolite called galantamine which has been developed to cure alzheimer desease. The purpose of this research was to explore the habitat of C. asiaticum which produces a high yield of galantamine. The bulb of C. asiaticum from four different locations which has altitudes ranging from 0-1250 meters above sea level was taken. Those locations were Santolo Beach-Garut, Cijambe-Subang, Dago-Bandung and Cikole-Lembang. The bulb was extracted and galantamine concentration was determined using HPLC (High Performance Liquid Chromatography). Parameters such as pH, humidity, soil organic content were also measured. The results showed that the bulb taken from Cikole had the highest galantaminecontent (63.592 mg/g). The results also showed positive correlation between altitude and galantamine content (r=0.843). However, galantamine content had no correlation with the size and weight of C. asiaticum bulb (r=0.0583). In relation to environmental condition, there was positive correlation between soil organic with galantamine content (r=0.862). Further, nitrogen concentration tends to affect the production of galantamine (r=0.848).
METODE ELEMEN HINGGA UNTUK PENYELESAIAN PERSAMAAN SCHRÖDINGER ATOM HIDROGENIK Pandiangan, Paken; Supriyadi, Supriyadi; Arkundato, A
Jurnal Matematika Sains dan Teknologi Vol 7 No 1 (2006)
Publisher : LPPM Universitas Terbuka

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The research computed the energy levels and radial wave functions of the  Hydrogen Atom. The method used for computation was FEM (finite element method). Using the variational method approach, FEM was applied to the action integral of  Schrödinger equation. This lead to the eigenvalue equation in the form of  global matrix equation. The results of computation were depended on boundary of the action integral of Schrödinger equation and number of elements. For boundary 0 - 100a0 and 100 elements,  they were the realistic and best choice of computation to the closed  analytic results. The computation of first five energy levels resulted E1 = -0.99917211 R∞, E2 = -0.24984445 R∞, E3 = -0.11105532 R∞,           E4 = -0.06247405 R∞ and  E5 = -0.03998598 R∞ where 1 R∞ = 13.6 eV. They had relative error under 0.1% to the analytic results.  

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