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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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PEMODELAN DAYA TAHAN BELAJAR MAHASISWA PENDIDIKAN TINGGI JARAK JAUH DENGAN PENDEKATAN REGRESI LOGISTIK BINER (STUDI KASUS: MAHASISWA FAKULTAS EKONOMI JURUSAN MANAJEMEN) Ratnaningsih, Dewi Juliah
Jurnal Matematika Sains dan Teknologi Vol 12 No 2 (2011)
Publisher : LPPM Universitas Terbuka

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Students’ persistence is the ability of students to survive in carrying out the study. In Universitas Terbuka (UT), there are no real dropped out student, but there are considered as non-active or non persistence students. Length of study time among UT’s students can be divided into binary data categories, which are valued as persistence (1) and non persistence (0). Logistic regression analysis is one type of statistical data analysis to be used for binary data. The purposes of writing this article are to identify the factors which influence the length of study time among students of the Department of Management, Faculty of Economics in UT, and to determine appropriate model in order to explain the relationship between the response variables (length of study time) with explanatory variables using logistic regression. The method used in this research is a case study with a number of samples as 2,936 college students. The result of the study shows that the factors influence the length of study time with alpha levels 0.05 are: age, the number of the courses taken, the employment status of the student, the participation in tutorials, the first semester achievement index, and the cumulative grade point.
BEBERAPA KONSEKUENSI SITUASI MEDIASI SEMPURNA PADA STRUKTUR KORELASI, KONTRIBUSI MEDIATOR, DAN UKURAN SAMPEL Suhardi, Deddy A; Isfarudi, Isfarudi
Jurnal Matematika Sains dan Teknologi Vol 11 No 1 (2010)
Publisher : LPPM Universitas Terbuka

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A very popular article by Baron and Kenny (1986), later extended by Kenny, Kashy, and Bolger (1998), recommended to social psychologists a test of mediation based on a set of steps involving correlations and regression weights. The serial published tests of mediation has come to be known as the Baron-Kenny approach. By the Baron-Kenny approach, a simple complete mediation is to be indicated which is a test of the direct path between an independent variable (X) and a dependent variable (Y) with a mediator variable (M) controlled is not significant. A simple mediation model has three correlations of their variables each. According to sequential regression analysis on a simple mediation model, a mediator M come after an independent variable X exist in the model, has a contribution of the mediator. Otherwise, sample size is a critical component to test as well as statistically significances. We argue the importance of investigating condition and interrelation of the three correlations, sequential contribution of the mediator, and sample size in the simple complete mediation cases by using hypotetical data generated by Microsoft Excel. We indicate some general consequences of simple complete mediation cases that are: (i) average of correlation XY is lower than average of correlation XM that lower than average of correlation MY; (ii) average contribution of mediator, indicated by R2 change, at interval of 23% up to 27%; (iii) distribution of effects X on Y when M controlled is influenced by sample size, the higher sample size, the lower distribution is; and (iv) average of mediation effects is at interval: 0.4 and above for levels of small sampel size (10 up to 40), between 0.2 and 0.4 for levels of medium sample size (50 up to 300), and under 0.2 for levels of large sample size (500 or above).  
PERAN PENYULUH PERTANIAN LAPANGAN DAN PARTISIPASI PETANI DALAM PROGRAM FEATI SERTA PENGARUHNYA TERHADAP PENDAPATAN PETANI DI KECAMATAN BANYUASIN III KABUPATEN BANYUASIN Berlian, Mery
Jurnal Matematika Sains dan Teknologi Vol 15 No 1 (2014)
Publisher : LPPM Universitas Terbuka

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Penelitian ini bertujuan untuk mendeskripsikan peran penyuluh pertanian, mengukur partisipasi petani, mengukur pendapatan petani sebelum dan sesudah adanya program FEATI, mengukur hubungan peran partisipasi petani pada FEATI dengan tingkat pendapatan petani. Penelitian ini dilaksanakan di Desa Seterio, Desa Purwosari dan Desa Lubuk Saung Kecamatan Banyuasin III Kabupaten Banyuasin dengan menggunakan metode survei yang terdiri dari 25 peserta Farmers Managed extension Activities (FMA) yang dipilih secara sensus, sehingga sampel seluruhnya adalah 75 peserta FMA. Analisis data menggunakan statistika non parametrik, yaitu: uji koefisien peringkat spearman dan uji beda nilai tengah. Hasil penelitian menunjukkan bahwa peran Penyuluh Pertanian Lapangan (PPL) dalam program FEATI di Kecamatan Banyuasin III Kabupaten Banyuasin, termasuk kategori tinggi dengan nilai skor rata-rata = 26, partisipasi petani sampel dalam program FEATI di Kecamatan Banyuasin III Kabupaten Banyuasin termasuk kategori tinggi (71%), pendapatan petani di KecamatanBanyuasin III Kabupaten Banyuasin mengalami peningkatan, di mana pendapatan riil petani sampel sebelum program FEATI tahun 2009 dari Rp.20.191.840,- per tahun meningkat menjadi Rp.33.561.368,- pertahun setelah adanya program FEATI tahun 2010, terdapat hubungan antara partispasi petani dalam program FEATI dengan pendapatan petani, koefisien korelasi Spearman (rs) = 0,913, artinya semakin tinggi tingkat partisipasi, semakin tinggi pendapatan petani.  
MODEL SISTEM DINAMIS UNTUK ESTIMASI PENCEMARAN UDARA DARI EMISI KENDARAAN BERMOTOR DI JAKARTA Soleiman, Nuraini; Tarumingkeng, Rudy C
Jurnal Matematika Sains dan Teknologi Vol 9 No 1 (2008)
Publisher : LPPM Universitas Terbuka

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Air pollution from vehicle emission becomes a major problem in urban areas, including Jakarta, Indonesia. This vehicle emission worsening ambient air concentration because of increasingly use of diesel engine for urban transportation, which exhaust particulate matter. This pollutan pose adverse health effect especially resparatory problems and premature mortality. This paper presents a model for estimating the level of pollution and the impact of that pollution on human health. An air quality model is developed using Gaussian model for urban area and the social-economic impact are estimated using Dose Response function. Simulation of the model shows a dynamic model is a powerfull tool for estimating the pollution level and the impact of the pollution. The result of the simulation can be used as basic information for decision makers to design some environmental policies for reducing the pollution level from vehicles emission.
MODEL DISTRIBUSI BAHAN AJAR UNIVERSITAS TERBUKA DAN IMPLEMENTASINYA Farihati, Sitta Alief; Aman, Amril; Ardana, I. N. Kutha
Jurnal Matematika Sains dan Teknologi Vol 10 No 2 (2009)
Publisher : LPPM Universitas Terbuka

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Universitas Terbuka (UT) was implementing the centralized distribution of learning material, it is not considered efficient. Therefore, the decentralized distribution system which requires warehouses at certain regional offices will be proposed. The aims of this research are (1) investigating the decentralized learning material distribution model, (2) choosing the optimal location of warehouses to minimize the cost of learning material distribution, (3) choosing the regional offices which will be served optimally by each warehouse, (4) comparing efficiency of the centralized and decentralized learning material distribution system. The distribution problem is modeled as a linear mixed integer programming problem. The model will be solved using Branch and Bound method. This study considers centralized learning material distribution system and two alternative of decentralized learning material distribution systems, which are alternative 1 and alternative 2. It is found that in 2008 the cost of the alternative 2 is lower than the centralized learning distribution system. Besides, if the demand of learning material is increasing, the alternative 2 is still less costly than the other systems.
PERSEBARAN DAN KARAKTERISASI INDUK JERUK KEPROK TAWANGMANGU ASLI (Citrus reticulata Blanco ssp Tawangmangu) Nuryandani, Einstivina
Jurnal Matematika Sains dan Teknologi Vol 13 No 1 (2012)
Publisher : LPPM Universitas Terbuka

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Information of original plants of Citrus reticulata Blanco ssp Tawangmangu is necessary to support breeding programs and efforts of conservation, since its massive population decreased because of CVPD infection in 1980s.This research was done in four villages in Kecamatan Tawangmangu: Banaran, Kalisoro, Blumbang, and Gondosuli by means of counting the plants with the right habitus and interviewed with the owner concerning its history. Geographical and morphological data were collected. Morphological data were analyzed by means of hierarchial cluster analysis. The result pictured as dendogram showed that 22 accession of original Citrus reticulata Blanco ssp Tawangmangu in 10 cultivation plot (9 plot in Blumbang and one plot in Gondosuli) were clustered in six groups, with 81,25% similarity. Informasi mengenai induk jeruk keprok asli Tawangmangu (Citrus reticulata Blanco ssp Tawangmangu) sangat diperlukan untuk mendukung program pemuliaan dan upaya konservasi tanaman tersebut, mengingat hampir punahnya jeruk keprok Tawangmangu akibat penyakit CVPD tahun 1980-an. Persebaran dan keberadaan tanaman induk jeruk keprok asli Tawangmangu merupakan hal penting sebagai dasar awal konservasi dan pengembangan tanaman tersebut. Penelitian dilakukan di empat desa di Kecamatan Tawangmangu, yaitu di Desa Banaran, Kalisoro, Blumbang, dan Gondosuli dengan menyusur area dan mendata keberadaan tanaman induk tersebut dengan melihat habitus, yang diperkuat wawancara dengan petani pemilik tanaman tersebut untuk mengetahui asal tanaman. Selanjutnya dicatat data lokasi dan morfologi dari tanaman. Data ini kemudian digunakan untuk analisis gerombol (cluster analysis). Selanjutnya pengelompokan ditampilkan dalam bentuk dendogram. Penelitian menghasilkan 22 aksesi induk jeruk keprok Tawangmangu yang tersebar dalam 10 plot penanaman di dua desa, yaitu Desa Blumbang dan Gondosuli. Analisis kelompok terhadap 22 aksesi induk jeruk keprok Tawangmangu memiliki tingkat kemiripan 81,25% dan menghasilkan enam kelompok aksesi.
KUALITAS AIR SUMUR DESA BANTARAN SUNGAI BENGAWAN SOLO BERDASARKAN ASPEK KEMASYARAKATAN DAN STANDAR MENTERI KESEHATAN Astuti, Beti Cahyaning
Jurnal Matematika Sains dan Teknologi Vol 16 No 1 (2015)
Publisher : LPPM Universitas Terbuka

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Clean water quality is very important for human health. Small amounts of hazardous contaminant are strictly forbidden. The objective of this research was to identify and assess wells water quality in the village of the Bengawan Solo River banks, Masaran District, Sragen Regency, Central Java Province. The parameters to analys the wells water quality were physics, chemistry, and microbiology, and then the quality is compared to the Regulation of the Minister of Health of the Republic of Indonesia No. 416/Menkes/Per/IX/1990.In conclusion, the wells water quality of six villages on the Bengawan Solo River banks, Masaran District, Sragen Regency, Central Java Province are ineligible quality standard for clean water. Air merupakan salah satu kebutuhan dasar bagi kehidupan manusia, sehingga kualitas air menjadi suatu perhatian yang sungguh-sungguh. Pencemaran dalam kadar sangat sedikit pada air tidak diperbolehkan sama sekali. Penelitian ini bertujuan untuk mengkaji kondisi kualitas air sumur di desa bantaran Sungai Bengawan Solo Kecamatan Masaran Kabupaten Sragen Propinsi Jawa Tengah, dan mengkaji pengetahuan masyarakat tentang air bersih. Kualitas air sumur dikaji berdasarkan pengetahuan masyarakat dan dianalisis dengan parameter fisika, kimia, dan mikrobiologi, berdasarkan Peraturan Menteri Kesehatan Republik Indonesia Nomor 416/Menkes/ Per/IX/1990 tentang Syarat-syarat dan Pengawasan Kualitas Air Bersih. Hasil penelitian menunjukkan bahwa kualitas air sumur enam desa di bantaran Sungai Bengawan Solo Kecamatan Masaran Kabupaten Sragen Propinsi Jawa Tengah tidak memenuhi syarat baku mutu untuk air bersih.  
PENGUATAN KELOMPOK USAHA BERSAMA (KUB) PERIKANAN TANGKAP(STUDI KASUS DESA LATUHALAT,KOTA AMBON,PROVINSI MALUKU) Hiariey, Lilian Sarah; Romeon, Nesti Rostini
Jurnal Matematika Sains dan Teknologi Vol 18 No 2 (2017)
Publisher : LPPM Universitas Terbuka

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The Collective Business Group (KUB) of fisheriesVillage Latuhalat is a new step in the fishing community toimprove the welfare of living independently.because most of the population depend for their on the earnings of the sea and exposed tothe problem of poverty.Therefore, it is necessary to finda strategy which leads to an increase in the role of public institutions by strengtheningresearchKUBaims: 1) Assess the capacity of KUB's fisheries in promoting member; 2) Identify the factors that can support and hinder the strengthening of KUB fisheries and 3) Develop strategies and programs to strengthen KUB's fisheries.Qualitative research methods using technical methodsof Participatory Rural Appraisal (PRA). Results showed thatKUB constraints and needs in developing fisheries catch.Factors that hamper the strengthening of KUB are: (1) The condition of the community, (2) business improvement member is not yet optimal; and (3) the Government in granting program is participatory and KUB yet untapped to empower fishermen. Supporting factors, among others: (1) The fishery potential is quite large; (2) the establishment of institutional KUB Risna and Sibu-Sibu; (3) the availability of Fish Landing Ports (PPI) as a production catches;(4) Support Government policy through an increase in fish production.While inhibiting factor among others: (1) production decreased catches; (2) The fishermen have consumptive life pattern; (3) do not have the skills to process the fish when the fish are abundant; (4) the implementation of organizational management and production operations management low arrest. KUB proposed strategies can include: (1) Increasing the capacity of members and administrators; (2) Mentoring institutional management; (3) The development of networking; (4) Procurement of technical training arrests; (5) The assistance promotion in the management of fishery resources based local wisdom; and (6) Acquisition of facilities and infrastructure arrests.Kelompok Usaha Bersama (KUB) perikanan tangkapdi Desa Latuhalat merupakan satu langkah baru dalam masyarakat nelayan untuk mengembangkan kesejahteraan hidup secara mandiri. Sebagian besar masyarakat desa tersebut menggantungkan kelangsungan hidupnya dari penghasilan laut dan dihadapkan pada masalah kemiskinan. Perlu dicari strategi yang mengarah pada peningkatan peranan lembaga masyarakat melalui penguatan KUB. Penelitian ini bertujuan untuk: 1) Mengkaji kapasitas KUB perikanan tangkap dalam meningkatkan usaha anggota; 2) Mengidentifikasi faktor-faktor yang dapat mendukung dan menghambat penguatan KUB perikanan tangkap; dan 3) Menyusun strategi dan program penguatan KUB perikanan tangkap. Metode penelitian menggunakan metode kualitatif teknis Participatory Rural Appraisal (PRA). Hasil penelitian menunjukkan adanya kendala dan kebutuhan KUB dalam mengembangkan usahaperikanan tangkap. Faktor-faktor yang menghambat penguatan KUB adalah: (1) Kondisi komunitas,  (2) Belum optimalnya peningkatan usaha anggota; dan (3) Pemerintah dalam pemberian program belum bersifat partisipatif dan KUB belum dimanfaatkan untuk memberdayakan nelayan.  Faktor-faktor pendukung, antara lain: (1) potensi perikanan tangkap cukup besar; (2) terbentuknya kelembagaan KUB Risna dan Sibu-Sibu; (3) tersedianya Pelabuhan Pendaratan Ikan (PPI) sebagai tempat produksi hasil tangkapan; (4) Dukungan kebijakan Pemerintah Daerah melalui program peningkatan produksi perikanan. Sedangkan Faktor-faktor penghambat antara lain: (1) produksi hasil tangkapan menurun; (2) nelayan memiliki pola hidup konsumtif; (3) Nelayan tidak memiliki ketrampilan dalam mengolah ikan saat ikan melimpah; (4) penerapan manajemen organisasi dan manajemen operasi produksi penangkapan rendah. Strategi yang dapat diusulkan KUB antara lain:  (1) Peningkatan kapasitas anggota dan pengurus; (2) Pendampingan manajemen kelembagaan; (3) Pengembanganjejaring; (4) Pengadaan pelatihan teknis penangkapan; (5) Pendampingan danpromosi dalam pengelolaan sumberdaya perikanan berbasis kearifanlokal dan (6) Pengadaan sarana dan prasarana penangkapan.
Pembuatan Minuman Soygurt dari Sari Tempe dengan menggunakan bakteri Lactobacillus plantarum Kusumaningrum, Elizabeth Novi
Jurnal Matematika Sains dan Teknologi Vol 5 No 1 (2004)
Publisher : LPPM Universitas Terbuka

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A study has been conducted to produce soygurt that contain factor-2 isoflavone (6,7,4’- trihydroxy isoflavone), derivat of tempe milk, which was inoculated with Lactobacillus plantarum bacteria. This research consisted of three stages: first was the production of tempe, second was the production of tempe’s milk, and third was the production of soygurt. The production of tempe used single culture of Rhizopus oligosporus and mix culture of Rhizopus stolonifer, Rhizopus oryzae, Rhizopus oligosporus and Rhizopus arrhizus. Protein and lipid content from single culture tempe was 17,28% & 3,92%, whereas in mix culture tempe was 17,24% & 3,96%; in tempe milk using single culture was 3,89% & 2,78%, whereas in mix culture produced 3,79% & 2,58%. Inoculum of Lactobacillus plantarum bacteria in variation of 5%, 7,5%, 10%, 12.5% and 15% v/v in tempe milk were optimized. The measured parameter were pH and formation rate of lactic acid. The best inoculums was 5% v/v. Organoleptic test showed that the best soygurt was soygurt from tempe milk fermentated with single inoculums followed by inoculation with L.plantarum. Protein and lipid content was 3,98% and 2,70%. Thin Layer Chromatography test showed that soygurt contain factor-2 isoflavone useful as antioxidant, antihaemolitic, and antifungi  
KAJIAN METODE BERBASIS MODEL PADA ANALISIS KELOMPOK DENGAN PERANGKAT LUNAK MCLUST Pardede, Timbul
Jurnal Matematika Sains dan Teknologi Vol 14 No 2 (2013)
Publisher : LPPM Universitas Terbuka

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Ward method and K-mean method are clustering method in which grouping only base on distance measure among observed objects, without considering statistical aspects. Model-based clustering is a method that use statistical aspects, as its  theoretical basis i.e. probability maximum criterion. This model has tenmodels with a variety of geometrical characteristics. Data partition is conducted by utilizing EM (expectation-maximization) algorithm. Then by using Bayesian Information Criterion (BIC) the best model is obtained. This research aimed to assess the effectiveness of ten models from the model-based clustereng and then tocompare result of grouping methods between model-based clustering with Ward clustering and K-mean clustering. This study used simulated data and applied data. Simulated data are generated with the R programs versions 2.14.1. Proses analysis was performed by using the Mclust programs vesions 4.0 with an interface the R programs versions 2.14.1. The results showed that model-based clustering was more effective in separating the condition of one separate group and two overlap groups than ward clustering and K-mean clustering. Metode Ward dan metode K-rataan adalah metode kelompok yang teknik-teknik pengelompokannya hanya memperhatikan ukuran jarak antar objek-objek pengamatan tanpa mempertimbangkan aspek statistiknya. Metode kelompok berbasis model adalah metode kelompok yang didasarkan pada aspek statistik, yaitu kriteria kemungkinan maksimum. Metode kelompok berbasis model mempunyai sepuluh model dengan berbagai macam sifat geometris. Penyekatan data dilakukan dengan menggunakan algoritma Ekspektasi-Maksimum (EM), kemudian dengan pendekatan Bayesian Information Criterion (BIC) diperoleh model terbaik. Penelitian ini bertujuan untuk mengkaji efektivitas dari sepuluh metode berbasis model dan kemudian membandingkan hasil pengelompokannya dengan metode Ward dan metode K-rataan. Penelitian ini menggunakan data simulasi yang dibangkitkan melali program R versi 2.14.1 dan dianalisis dengan menggunakan program Mclust versi 4.0 dengan interface program R. Hasil penelitian menunjukkan bahwa metode kelompok berbasis model lebih efektif memisahkan kelompok-kelompok yang saling tumpang tindih dibandingkan dengan metode gerombol Ward dan K-rataan.

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