cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota tangerang selatan,
Banten
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
 14   15   16   17   18 
PEMANFAATAN SEREH (Cymbopogon Cytratus) DALAM MENURUNKAN BAU PADA PUPUK ORGANIK CAIR DAN POTENSINYA DALAM MENINGKATKAN PRODUKSI TANAMAN CABAI (Capsicum Annum) Nurhasanah, Nurhasanah
Jurnal Matematika Sains dan Teknologi Vol 14 No 1 (2013)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Research in the use of lemongrass (Cymbopogon citratus) to reduce odors in liquid organic fertilizer has been conducted in Bogor for 6 months. This study begin with a liquid organic fertilizer produced from 1 kg of shrimp waste, 1 kg of maize, 1 kg of bean sprouts, 10 liters of coconut water, 500 ml of EM4 and 500 g of sugar through fermentation process for 6 weeks. Then the result of liquid organic fertilizer was added by an ingredient lemongrass as deodorizing with doses of 0, 10%, 20% and 30% (w/v). After that it is fermented for 2 weeks. The next stage was the application of liquid organic fertilizer as a foliar fertilizer at chillies (Capsicum annum) planting using a completely randomized design (CRD) 1 factors type of using liquid organic fertilizer (control, liquid organic fertilizer without lemongrass, liquid organic fertilizer + 10% lemongrass, liquid organic fertilizer + 20% lemongrass and liquid organic fertilizer + 30% lemongrass) respectively at doses of 0, 6, 12 and 18 ppm. The parameters measured were odor (NH3 and H2S), levels of macro nutrients (N, P, K, Ca, Mg, and S) and micro nutrients (Cu, Zn, Mn, and Fe) after fermenting process, and the production of crops (fruit number and fruit weight) after planting. Research results show that the higher dose of lemongrass added cause levels of odor (NH3 and H2S) in the liquid organic fertilizer decreased and content of macro nutrients, micro nutrients, and phytohormones increased. The planting results indicate liquid organic fertilizer which added 20% lemongrass in a dose of 12 ppm was the optimal dose in increasing crop production. Penelitian penggunaan sereh (Cymbopogon citratus) dalam menurunkan bau pada pupuk organik cair telah dilakukan di Bogor selama 6 bulan. Penelitian ini diawali dengan membuat pupuk organik cair yang dihasilkan dari 1 kg limbah udang, 1 kg jagung, 1 kg touge, 10 Liter air kelapa, 500 ml EM4 dan 500 g gula pasir melalui proses fermentasi selama 6 minggu. Kemudian pada pupuk organik cair yang dihasilkan ditambahkan sereh sebagai bahan penghilang bau dengan dosis 0, 10%, 20% dan 30% (w/v). Setelah itu didiamkan selama 2 minggu. Tahapan berikutnya merupakan pengaplikasian pupuk organik cair tersebut sebagai pupuk daun pada pertanaman cabai (Capsicum annum) dengan menggunakan Rancangan Acak Lengkap (RAL) 1 faktor jenis pupuk organik cair yang digunakan (kontrol, pupuk organik cair tanpa sereh, pupuk organik cair + 10% sereh, pupuk organik cair + 20% sereh dan pupuk organik cair + 30% sereh) masing-masing pada dosis 0, 6, 12 dan 18 ppm. Parameter yang diukur adalah parameter kebauan (NH3 dan H2S), kadar hara makro (N, P, K, Ca, Mg, dan S) dan kadar hara mikro (Cu, Zn, Mn, dan Fe) setelah proses pemeraman, dan produksi tanaman (jumlah buah dan bobot buah) setelah pertanaman. Hasil penelitian menunjukkan bahwa semakin tinggi dosis sereh yang ditambahkan menyebabkan kadar gas penyebab bau (NH3 dan H2S) pada pupuk organik cair makin berkurang dan kadar hara makro, hara mikro maupun fitohormon makin meningkat. Hasil pertanaman menunjukkan pemberian pupuk organik cair yang ditambahkan 20% sereh pada dosis 12 ppm merupakan dosis paling optimal dalam meningkatkan produksi tanaman.
PENGELOMPOKKAN DAN KLASIFIKASI PENGGUNAAN KONTRASEPSI DI INDONESIA Suwardika, Gede
Jurnal Matematika Sains dan Teknologi Vol 17 No 1 (2016)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The use of contraception is crucial, given the growth rate can decrease. The election to use or not to use contraceptives is one of the problems of classification. Classification problem can be solved by methods of binary Logistic Regression, Support Vector Machine (SVM), and CART (Classification and Regression Trees). However, due to the variable response will be made binary then the done method of grouping in advance with its own assumptions, the k-means cluster and cluster the kernel k-means. In this study data about the use of classification taken contraceptives that were affected by the 9 free variables. Such data is data the secondary National Contraceptive Prevalence Survey results Indonesia in 1987. The number of respondennya is 1.473 people. The end results were obtained grouping the results turned out to be assuming themselves better than other methods. While on the method of classification SVM classification that results obtained are better than the other two methods. However, if the method of grouping and classification are merged, acquired that classification with SVM where the variable response is obtained based on the k-means cluster groupings or clusters of the kernel k-means can make Apperant Error Rate (APER) the least. Penggunaan kontrasepsi merupakan hal yang penting, mengingat dapat menurunkan laju pertumbuhan. Pemilihan menggunakan atau tidak menggunakan alat kontrasepsi merupakan salah satu permasalahan klasifikasi. Permasalahan klasifikasi dapat diselesaikan salah satunya dengan metode Regresi logistik biner, Support Vector Machine (SVM), dan CART (Classification and Regression Trees). Namun dikarenakan variabel respon akan dijadikan biner maka dilakukan metode pengelompokan terlebih dahulu dengan asumsi sendiri, cluster k-means dan cluster kernel k-means.Dalam penelitian ini diambil data mengenai klasifikasi penggunaan kontrasepsi yang dipengaruhi oleh 9 variabel bebas. Data tersebut adalah data sekunder hasil Survey Prevalensi Kontrasepsi Nasional Indonesia tahun 1987. Jumlah respondennya adalah 1.473 orang. Hasil akhir yang diperoleh ternyata hasil pengelompokan dengan asumsi sendiri lebih baik dibandingkan metode yang lain. Sedangkan pada metode pengklasifikasian diperoleh bahwa hasil klasifikasi SVM lebih baik dibanding dua metode yang lain. Namun apabila metode pengelompokan dan klasifikasi digabung, diperoleh bahwa pengklasifikasian dengan SVM dimana variabel respon diperoleh berdasarkan hasil pengelompokan cluster k-means atau cluster kernel k-means dapat menghasilkan Apperant Error Rate (APER) yang paling kecil.
PEMANFAATAN IDEF0 UNTUK ANALISIS KINERJA SISTEM MANUFAKTUR (STUDI KASUS: THE ORDER HANDLING MANUFACTURING SYSTEMS) Budiarto, Slamet
Jurnal Matematika Sains dan Teknologi Vol 8 No 1 (2007)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The IDEF0 (Integration Definition Language 0) developed by Douglas T.Ross and SoftTech.Inc is a procedure for modeling functionality as part of the Air Force programmed on computer-aided-manufacturing which based on SADT (Structured Analisys and Design Technique). Wang and Smith (1988) suggested that IDEF0 could be combined with SSM. IDEF0 is used to analysis manufacture systems, in this case OHMS. Data from research (Budiarto, 2005) on Division of General Engineering at PT.PAL use OHMS further analyzed in this study. Data analysis shows that IDEF0 can be used to mapping activity system, both at the global as well as detail views, and performance indicators for each detail activities can be developed trough IDEF0. In addition IDEF0 can be used as a tool in providing recommendation of performance improvement of manufacturing systems.   
STATUS HARA MAKRO TANAH YANG DITUMBUHI POPULASI BINTANGUR (Calophyllum Spp.) (Studi Kasus Di Hutan Lindung Sei Tembesi Dan Bukit Tiban, Batam) Adisti Yuliastrin
Jurnal Matematika Sains dan Teknologi Vol. 17 No. 2 (2016)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This research was conducted by the problem of population differences bintangur in Sei Tembesi and Bukit Tiban Protected Forest allegedly influenced by macro nutrient content in the soil. The study was conducted using a survey method. Samples were taken by purposive by following along a 100 m transect lines that divide the contour lines. Transect were initiated at least 50 m from the edge of the forest that are placed propossionally and prioritized on location around bintangur population. Soil sampling conducted on the soil surface of ± 5 cm to a depth of ± 25 cm from the soil surface. Based on the research that there are differences in soil organic matter content in the protected forest and macro nutrient in the soil. Soil pH is at the same relativity value, but that value is an extreme value when compared with the value according to criteria of Soil Chemical Properties. This soil conditions is able to inhibit the growth of bintangur. Bintangur population in both of the protected forest can be maintained through soil conservation biological. Penelitian ini dilatarbelakangi oleh permasalahan perbedaan populasi bintangur di Hutan Lindung Sei Tembesi dan Bukit Tiban yang diduga dipengaruhi oleh kandungan hara makro di dalam tanah. Penelitian dilakukan menggunakan metode survei. Sampel diambil dengan cara purposive dengan mengikuti jalur transek sepanjang 100 m yang membelah garis kontur. Jalur transek tersebut dimulai minimal 50 m dari tepi hutan yang ditempatkan secara proporsional dan diprioritaskan pada lokasi sekitar populasi bintangur. Pengambilan sampel tanah dilakukan pada permukaan tanah ± 5 cm pada kedalaman ± 25 cm dari permukaan tanah. Berdasarkan hasil penelitian diperoleh informasi bahwa terdapat perbedaan kandungan bahan organik tanah di kedua hutan lindung tersebut dan kandungan hara makro di dalam tanah. pH tanah berada pada nilai yang relatif sama, namun nilai tersebut merupakan nilai yang ekstrim bila dibandingkan dengan Kriteria Penilaian Sifat Kimia Tanah. Kondisi tanah seperti itu mampu menghambat pertumbuhan bintangur. Populasi bintangur di kedua hutan lindung tersebut dapat dipertahankan melalui konservasi tanah secara biologi.
PEMANFAATAN UMBI TALAS SEBAGAI BAHAN SUBTITUSI TEPUNG TERIGU DALAM PEMBUATAN COOKIES YANG DISUPLEMENTASI DENGAN KACANG HIJAU Welli Yuliatmoko; Dian Indrayani Satyatama
Jurnal Matematika Sains dan Teknologi Vol. 13 No. 2 (2012)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Taro flour can be used as a wheat flour substitution in cookies making, although its quality is still relatively low, especially in terms of taste and nutritional composition. An alternative way to improve its nutritional composition is by the addition of green beans, as a protein source. This study was aimed to obtain the cookies formulation that use Lampung Taro flour enriched with green beans flour as a wheat flour substitution. The cookies were tested organoleptically by panelists using hedonic scale including color, aroma, taste, texture and general appearance. The acceptable cookies were analyzed their chemical characteristics. The results showed that Taro flour cookies with the content of 30%, 50%, and 60% Lampung Taro flour have received the best judgment from panelists. From the nutritional point these cookies were considered meet the nutritional value specified by SNI 1992 but the protein content was still below standard. The addition of 10% green beans flour was not able to improve the nutritional value of protein in the cookies. Taro flour can be used as a wheat flour substitution in cookies making, although its quality is still relatively low, especially in terms of taste and nutritional composition. An alternative way to improve its nutritional composition is by the addition of green beans, as a protein source. This study was aimed to obtain the cookies formulation that use Lampung Taro flour enriched with green beans flour as a wheat flour substitution. The cookies were tested organoleptically by panelists using hedonic scale including color, aroma, taste, texture and general appearance. The acceptable cookies were analyzed their chemical characteristics. The results showed that Taro flour cookies with the content of 30%, 50%, and 60% Lampung Taro flour have received the best judgment from panelists. From the nutritional point these cookies were considered meet the nutritional value specified by SNI 1992 but the protein content was still below standard. The addition of 10% green beans flour was not able to improve the nutritional value of protein in the cookies.
PERHITUNGAN INTEGRAL FUNGSI REAL MENGGUNAKAN TEKNIK RESIDU Warsito Warsito
Jurnal Matematika Sains dan Teknologi Vol. 8 No. 1 (2007)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

SISTEM PENENTU GERAKAN MOBILE ROBOT YANG BELAJAR SENDIRI CARA UNTUK BERGERAK MAJU DAN MENGINDARI TRABRAKAN MENGGUNAKAN NEURAL NETWORK (NN) Puspita, Eru
Jurnal Matematika Sains dan Teknologi Vol 12 No 2 (2011)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Commonly used for driving mobile robot is by using certain pre defined algorithm. This research will try to develop driving technique using continuous self learning NN while mobile robot on go. This research only observe about how mobile robot by it self can move forward an how to avoid a collision. Program NN will try to learn how to move forward, backward, turn left, turn right or other possibility depend on or by using collision experience. The test results obtained 82% successful runs forward and approximately 90% managed to avoid a collision.
KERJA PASAK BUMI (Eurycoma Longifolia. JACK) TERHADAP TINGKAH LAKU DAN LIBIDO TIKUS PUTIH JANTAN Pratomo, Hurip; Winarto, Adi; Rusdiyanto, Edi
Jurnal Matematika Sains dan Teknologi Vol 11 No 1 (2010)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A research to observe sexual behavior or libido because of the treatment of pasak bumi (Eurycoma longifolia Jack) boiled water was conducted. Observation used a designed cage within an estrus female white rat partitioned by wire net. There were four variations doses of pasak bumi boiled water administered to white male mature rats. The first dose was 18 mg/200 g bw (bw= body weight), the second dose was 100 mg/200 g bw, the third dose was 200 mg/200 bw, and the control that administered aquadest 1 ml. Male rat sexual behavior characteristics were: 1. Coming near female partition, 2. Scratching/nipping partition, 3. Meet face to face. The result of the analysis showed that libido stimulated by administered pasak bumi boiled water. The best effect of libido raised by administered the first dose = 18 mg/200 g bw. Meanwhile the effect of libido of dose 2 and 3 better than the control group aquadest but lower than the effect of dose 1 did.  
REGRESI ROBUST UNTUK MEMODELKAN PENDAPATAN USAHA INDUSTRI MAKANAN NON-MAKLOON BERSKALA MIKRO DAN KECIL DI JAWA BARAT TAHUN 2013 Utomo, Agung Priyo
Jurnal Matematika Sains dan Teknologi Vol 15 No 2 (2014)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Kontribusi subsektor industri makanan, minuman, dan tembakau merupakan penyumbang terbesar Produk Domestik Bruto (PDB) sektor industri pengolahan non-migas Indonesia yaitu sebesar 36,27%. Industri ini mampu menyerap 29,29% tenaga kerja sektor industri. Industri tersebut pada umumnya merupakan industri berskala mikro dan kecil. Penelitian ini bertujuan untuk menganalisis variabel-variabel yang mempengaruhi pendapatan usaha industri makanan bukan jasa (non-makloon) skala mikro dan kecil. Data yang digunakan bersumber dari Survei Tahunan Industri Mikro dan Kecil (IMK) tahun 2013 yang dilakukan oleh Badan Pusat Statistik (BPS). Metode analisis yang digunakan adalah regresi robust karena data menunjukkan terjadinya nilai pencilan (outlier). Hasil penelitian menunjukkan bahwa variabel jumlah pengeluaran, jumlah tenaga kerja, dan jumlah modal berpengaruh terhadap pendapatan usaha industri makanan non-makloon skala mikro dan kecil. Pengeluaran untuk material memiliki nilai elastisitas lebih besar dibandingkan jumlah tenaga kerja dan jumlah modal. Usaha industri makanan non-makloon skala mikro dan kecil, sebaiknya lebih fokus pada peningkatan bahan baku dan bahan-bahan lainnya yang digunakan untuk keperluan produksi jika ingin meningkatkan pendapatan.
ESTIMASI EMISI DIOKSIN/FURAN DAN FAKTOR-FAKTOR YANG MEMPENGARUHI KONSENTRASI EMISI KE UDARA YANG BERASAL DARI INDUSTRI LOGAM Warlina, Lina; Noor, Erliza; Fauzi, Akhmad; Tarumingkeng, Rudy C; Sutjahjo, Surjono H
Jurnal Matematika Sains dan Teknologi Vol 9 No 1 (2008)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Dioxin/furan is one of the persistent organic pollutants (POPs) that the government and public in Indonesia has not taken care of, as there is currently no policy on reducing dioxin/furan emission, even according to previous research dioxin/furan emission has already high. Steel industries produce dioxin/furan emission that will give negative impact to the people (cancer and death) and environment. The objective of this research was to estimate dioxin/furan emission and to determine factors that influence dioxin/furan emission concentration on the air, especially from steels industries. Methods employed in this research used emission factors to estimate dioxin/furan emission and Gaussian dispersion modeling to estimate emission concentration. The result showed that dioxin/furan emission is 9,38-13,54 gTEQ and it has to be reduced. Production is main factor to contribute dioxin/furan emission to the air. Besides that, emission concentration also depends on temperature, wind speed, height of stacks and radius from the site to the recipient. The conclusion of the research is dioxin/furan emission should be reduced, by means of first or second treatment.

Page 16 of 41 | Total Record : 403

 14   15   16   17   18 

Filter by Year

2003 2024


Reset
Filter By Issues
All Issue Vol. 25 No. 2 (2024): September (in Progress) Vol. 25 No. 1 (2024) Vol. 24 No. 2 (2023) Vol. 24 No. 1 (2023) Vol. 23 No. 2 (2022) Vol. 23 No. 1 (2022) Vol. 22 No. 2 (2021) Vol. 22 No. 1 (2021) Vol. 21 No. 2 (2020) Vol. 21 No. 1 (2020) Vol. 20 No. 2 (2019) Vol 20 No 2 (2019) Vol. 20 No. 1 (2019) Vol 20 No 1 (2019) Vol 20 No 1 (2019) Vol 19 No 2 (2018) Vol. 19 No. 2 (2018) Vol 19 No 1 (2018) Vol. 19 No. 1 (2018) Vol. 18 No. 2 (2017) Vol 18 No 2 (2017) Vol 18 No 1 (2017) Vol. 18 No. 1 (2017) Vol 17 No 2 (2016) Vol. 17 No. 2 (2016) Vol 17 No 1 (2016) Vol. 17 No. 1 (2016) Vol. 16 No. 2 (2015) Vol 16 No 2 (2015) Vol 16 No 1 (2015) Vol. 16 No. 1 (2015) Vol 15 No 2 (2014) Vol. 15 No. 2 (2014) Vol 15 No 1 (2014) Vol. 15 No. 1 (2014) Vol. 14 No. 2 (2013) Vol 14 No 2 (2013) Vol. 14 No. 1 (2013) Vol 14 No 1 (2013) Vol 13 No 2 (2012) Vol. 13 No. 2 (2012) Vol. 13 No. 1 (2012) Vol 13 No 1 (2012) Vol 12 No 2 (2011) Vol. 12 No. 2 (2011) Vol. 12 No. 1 (2011) Vol 12 No 1 (2011) Vol. 11 No. 2 (2010) Vol 11 No 2 (2010) Vol. 11 No. 1 (2010) Vol 11 No 1 (2010) Vol. 10 No. 2 (2009) Vol 10 No 2 (2009) Vol. 10 No. 1 (2009) Vol. 9 No. 2 (2008) Vol 9 No 2 (2008) Vol 9 No 1 (2008) Vol. 9 No. 1 (2008) Vol 8 No 2 (2007) Vol. 8 No. 2 (2007) Vol. 8 No. 1 (2007) Vol 8 No 1 (2007) Vol 7 No 2 (2006) Vol. 7 No. 2 (2006) Vol 7 No 1 (2006) Vol. 7 No. 1 (2006) Vol 6 No 2 (2005) Vol. 6 No. 2 (2005) Vol. 6 No. 1 (2005) Vol 6 No 1 (2005) Vol 5 No 2 (2004) Vol. 5 No. 2 (2004) Vol 5 No 1 (2004) Vol. 5 No. 1 (2004) Vol. 4 No. 2 (2003) Vol. 4 No. 1 (2003) Vol 4 No 1 (2003) More Issue