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
 10   11   12   13   14 
ANALISIS JARINGAN KOMUNIKASI PETANI TANAMAN SAYURAN (KASUS PETANI SAYURAN DI DESA EGON, KECAMATAN WAIGETTE, KABUPATEN SIKKA, PROVINSI NUSA TENGGARA TIMUR) Bulkis, Bulkis
Jurnal Matematika Sains dan Teknologi Vol 16 No 2 (2015)
Publisher : LPPM Universitas Terbuka

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

Abstract

In order to improve production and quality of vegetables, farmers need adequate information and reliable sources of information to achieve their goals. Meet their information needs on the behavior of vegetable farming;  farmers need to establish a network of communication among farmers. The purpose of this study was: (1) to describe the communication network among vegetable farmers in the village of Egon (2) to analyze the relationship between the characteristics of farmers and communication networks. The unit of analysis is a vegetable farmer. Samples of study are fifty-three farmers sampled using the census. Primary data collection and field observations were conducted during June to July 2012.  Data used in this study consisted of primary and secondary data. Sociometric analysis is used to view network communications occur among vegetable farmers. Communication network structures were analyzed using UCINET VI. Data analysis was performed by using Microsoft excel and followed by Spearman rank correlation analysis by using SPSS for windows.  The results show that: (1) the description of communication network of vegetable farmers are  radial personal network and interlocking personal network , while crop protection communication networks and communication networks of harvest and post harvest is central personal network (2)  there was a relation between farmer’ non formal education, farming experience, cosmopolitan level, land area, and tenure with network communications.Dalam rangka meningkatkan produksi dan kualitas sayuran, petani membutuhkan informasi yang memadai dan sumber informasi yang terpercaya untuk mencapai tujuan mereka. Untuk memenuhi kebutuhan informasi mereka tentang perilaku usahatani tanaman sayuran, petani membangun jaringan komunikasi antarpetani. Artikel ini membahas (1) gambaran jaringan komunikasi diantara petani sayuran di desa Egon, dan (2) hubungan antara karakteristik petani dengan jaringan komunikasi. Lima puluh tiga petani diambil sebagai sampel dengan menggunakan metode sensus. Pengumpulan data primer dan observasi lapangan dilakukan selama bulan Juni sampai Juli 2012. Data yang digunakan dalam penelitian ini terdiri dari data primer dan sekunder. Analisis sosiometri digunakan untuk melihat jaringan komunikasi yang terjadi di antara petani sayuran. Struktur jaringan komunikasi dianalisis dengan menggunakan UCINET VI. Analisis data dilakukan dengan menggunakan program excel dan SPSS for windows, yaitu analisis korelasi Person dan Rank Spearman. Hasil yang diperoleh: (1) gambaran jaringan komunikasi usahatani petani sayuran yang terbentuk adalah jaringan personal radial dan jaringan personal memusat (2) terdapat hubungan antara pendidikan non formal, pengalaman bertani, tingkat kosmopolitan, luas lahan, status kepemilikan lahan dengan jaringan komunikasi.
KAJIAN TENTANG PENGARUH TWO STAGE CLUSTER SAMPLING TERHADAP STATISTIK UJI-F Utomo, Agung Priyo
Jurnal Matematika Sains dan Teknologi Vol 8 No 2 (2007)
Publisher : LPPM Universitas Terbuka

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

Abstract

In regression analysis we make several assumptions about the error term. The following assumptions are often made: 1) the error terms are random variables with mean 0; 2) nonautocorrelation; 3) homoscedasticity, and 4) normality. The assumption of identically and independently distributed (iid) observations that underlies regression procedures is called into question when analyzing complex survey data. Particularly the existence of clusters in two stage samples usually exhibit positive intracluster correlation. If we use Ordinary Least Squares (OLS) procedures to make inferences in regression analysis for two stage cluster samples, we will be faced with a problem. This study aims to know the effect of two stage least squares on the F-Statistic. In general, although OLS procedures are unbiased but not fully efficient for estimation of the regression coefficients. Variance of the OLS estimators for the regression coefficients can be larger than the usual OLS variance expression would indicate. Failure to consider this possibility leads to underestimation of variances, with consequences for confidence intervals and the F-Statistic. The effect of intracluster correlation on the F-Statistic is the distortion of its distribution. The F-Statistic will not follow the Central F distribution anymore. Consequently, the hypothesis testing procedure is invalid.
PENGARUH BAHAN ORGANIK DAN TRACE ELEMENTS TERHADAP PERTUMBUHAN DAN KANDUNGAN GULA TANAMAN STEVIA (STEVIA REBAUDIANA BERTONI M.) Dewi, Lussana Rossita
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

The aims of research was to study the effect of organic material and trace elements added on growth and sugar content of Stevia rebaudiana. The research was designed using Complete Random Design (CRD) consist of 20 factors with 3 repeats. The factors given consist of combination of 0, 0,5, 1, and 1,5 kg of organic material, 0, 25, and 50 ppm of trace elements, and spraying time, unsprayed, sprayed once every 3 days, and sprayed once every 6 days, respectively. Observed variable includes plant height, number of leaves, fresh and dry weight of root and stem. The observation was conducted every 4 days, started from 1 week after planting up to harvest. Observation of fresh and dry weight of root and stem was conducted upon harvesting. The result indicated that application of organic material have significant influence on plant height, number of leaves, fresh and dry weight of root and stem. Concentration of trace elements showed significant influence on plant height, number of leaves, and stem fresh weight, but didnt influence on stem dry weight and fresh and dry weight of root. Spraying time of trace elements had significant influence on number of leaves, fresh and dry weight of stem and root fresh weight, but didnt show significant influence on plant height and root dry weight. The content of stevia sugar using treatment applications with organic material and trace elements was higher compared to control. Tujuan penelitian adalah untuk mengetahui pengaruh pemberian bahan organik dan unsur trace elements terhadap pertumbuhan dan kandungan gula stevia pada tanaman Stevia rebaudiana Bertoni M. Penelitian ini menggunakan Rancangan Acak Lengkap yang terdiri dari 20 perlakuan dengan 3 ulangan. Perlakuan yang digunakan adalah kombinasi bahan organik dengan dosis 0 kg, 0,5 kg, 1 kg, dan 1,5 kg, trace elements (dosis 0 ppm, 25 ppm, dan 50 ppm), dan waktu penyemprotan (tanpa disemprot, disemprot 3 hari sekali, dan disemprot 6 hari sekali). Peubah yang diamati meliputi tinggi tanaman, jumlah daun, bobot basah dan kering akar, serta bobot basah dan kering tajuk. Pengamatan dilakukan 4 hari sekali dimulai sejak tanaman berumur 1 minggu setelah tanam sampai panen. Pengamatan bobot kering tajuk dan akar dilakukan satu kali pada saat pemanenan. Hasil penelitian menunjukkan bahwa pemberian kompos berpengaruh nyata pada tinggi tanaman, jumlah daun, bobot basah tajuk, bobot kering tajuk, bobot basah akar, dan bobot kering akar. Konsentrasi trace elements berpengaruh nyata pada tinggi tanaman, jumlah daun, dan bobot basah tajuk. Sedangkan pada bobot kering tajuk dan bobot basah dan kering akar tidak berpengaruh nyata. Waktu penyemprotan trace elements berpengaruh nyata pada jumlah daun, bobot basah dan kering tajuk, dan bobot basah akar. Untuk tinggi tanaman dan bobot kering akar tidak berpengaruh nyata. Kandungan gula stevia pada tanaman stevia dengan perlakuan kombinasi bahan organik dan trace elements lebih tinggi daripada kontrol.  
PENGUJIAN ISOLAT MIKORIZA ARBUSKULA (GLOMUS GEOSPORUM) PADA TANAMAN MENTIMUN (CUCUMIS SATIVUS L.) Puspitasari, Rita Tri; Elfarisna, Elfarisna; Suryati, Yati; Pradana, Nosa Tirtajaya
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 arbuscular mycorrhizal (MA) in various studies proves that it can save up to 50% fertilizer because the MA can help absorpt nutrients, especially P. In addition, the MA can help plant resistance, pest attacks and can help plants cope with extreme circumstances, such as drought, high salinity, toxic materials and heavy metals. The study aimed to test the potential of arbuscular Mycorrhizal isolates (Glomus geosporum) in cucumbers. The test of its potentials is still in the early stages of laboratory scales due to the limitation of producing the isolates. The test parameters were as follows: the number of leaves, the number of male and female flowers, fruit length, fruit diameters and fruit weights. The results showed that mycorrhizal (Glomus geosporum) being tested + 50% NPK, compared with mycorrhizae from a proven institution + 50% of the recommended NPK fertilizers (NPK 100%), have no significant differences in all parameters. As a result of this, Isolates Glomus geosporum can save less than 50% of the recommended NPK in cucumber crop (Cucumis sativus L.). This therefore has a potential to be field-tested involving other plants. Penggunaan mikoriza arbuskula (MA) dalam berbagai penelitian sudah terbukti dapat menghemat pupuk sampai 50%, karena MA dapat membantu penyerapan unsur hara terutama P. Selain itu,  MA dapat membantu resistensi tanaman, serangan hama penyakit dan dapat membantu tanaman mengatasi keadaan ekstrim, seperti kekeringan, salinitas tinggi, bahan toksik dan logam berat. Penelitian ini bertujuan menguji potensi isolat Mikoriza arbuskula (Glomusgeosporum) pada tanaman mentimun. Pengujian isolat Mikoriza arbuskula (Glomusgeosporum) masih dalam taraf skala laboratorium, karena keterbatasan isolat yang dihasilkan. Parameter yang diuji adalah jumlah daun, jumlah bunga jantan dan betina, panjang buah, diameter buah, dan bobot buah. Hasil penelitian menunjukkan bahwa mikoriza (Glomusgeosporum) yang diuji + 50% NPK dibandingkan dengan mikoriza dari suatu institusi yang telah teruji + 50% NPK dan pupuk yang direkomendasikan (NPK 100%), terlihat  tidak berbeda nyata pada semua parameter. Dengan demikian, Isolat Glomusgeosporum dapat menghemat pupuk NPK sampai 50% dari NPK yang dianjurkan pada tanaman Mentimun (Cucumissativus L.), sehingga cukup berpotensi untuk diuji pada skala lapangan bagi tanaman mentimun.
KONTRIBUSI TEKNOLOGI PENGENDALIAN HAMA TERPADU PADA PENURUNAN PENGGUNAAN PESTISIDA: KASUS PRODUKSI PADI DI YOGYAKARTA Mariyono, Joko
Jurnal Matematika Sains dan Teknologi Vol 7 No 2 (2006)
Publisher : LPPM Universitas Terbuka

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

Abstract

The objective of this study is to examine the contribution of integtated pest management technology to significant decrease in use of pesticides in rice production.  This study was conducted in Yogyakarta, where the technology has been intensively disseminated through farmer’s field school. Aggregate data shows that the use of pesticides declines significantly after the introduction of the technology.  A constant elasticity of input demand model was employed in this study. The results of the study show that IPM technologi was increasingly disseminated during 1989-1998. At the same period, pesticide use declined significantly. The decrease in pesticide use was affected by the increase dissemination of IPM technology and the increase in relative price of pesticides.
PERAN MASYARAKAT PESISIR DALAM PENERAPAN STRATEGI KONSERVASI SUMBERDAYA LAUT (KASUS DI KELURAHAN PALABUHANRATU, KECAMATAN PALABUHANRATU, KABUPATEN SUKABUMI) Winata, Adi; Yuliana, Ernik
Jurnal Matematika Sains dan Teknologi Vol 11 No 2 (2010)
Publisher : LPPM Universitas Terbuka

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

Abstract

This article is objected to measure the coastal communities role in the implementation of marine resource conservation strategies. The population were all coastal communities in Palabuhanratu, Sukabumi. Respondents of 50 people were chosen randomly. Data were collected by using survey method, and were analyzed by Pearson correlation. The results indicated that the level of education of coastal communities was a primary school. Respondents have been working more than 10 years. Those who knew the meaning of the protection and conservation of marine resources was 56%, while 88% of them did not know the meaning of preservation of marine resources. The role of coastal communities in aspects of marine resource protection was low, in the aspects of marine resource conservation was high, and in the preservation of marine resources was low. The characteristics of coastal communities correlated positively with the level of knowledge of coastal communities (0,3 and ? = 0,05). Furthermore, the level of knowledge of coastal communities associated with the role of coastal communities in the implementation of conservation strategies (0,5 and ? = 0,05).
KOMPARASI NILAI GIZI SAYURAN ORGANIK DAN NON ORGANIK PADA BUDIDAYA PERTANIAN PERKOTAAN DI SURABAYA Iriyani, Dwi; Nugrahani, Pangesti
Jurnal Matematika Sains dan Teknologi Vol 18 No 1 (2017)
Publisher : LPPM Universitas Terbuka

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

Abstract

The developing of urban agriculture is having an important contribution in food supply to the citizen. One of urban agriculture commodity which is marketable is leaf vegetable, as the sources of protein, vitamin, minerals, essential amino acids that is cheap and available everydays. Even though the developing of urban agriculture commodity in the marginal land condition, but the result is a good product. This research conducted to make a comparison of nutrition value the leaf vegetable which planted in surabaya urban agriculture, such as Kangkung (Ipomea aquatic forsk), Mustard green (Brassica rapa), and Spinach (Spinacea oleracea L.), with its similar products which are produced organically. The method  used is descriptive quantitative. The total chlorophyll content and carotenoids are be measured by using spectrophotometric method at a wavelength of 480 nm, 645nm, and 663 nm.The content of vitamin C be measured by using the titration methods solution of Dichlorophenol Indophenol (DCPIP). The findings indicated that vegetable which planed in non organic agriculture, or organic, is having high enough in water content, more than 80%. The high vitamin C level is in non organic Mustard green (2,45 µg/g) and the lowest one in organic spinach (0,68 µg/g). The high chlorophyll level is in non organic spinach (23,81 mg/L) and the lowest one in non organic kangkung (3,29 mg/L). Likewise, the high carotene level is in non organic spinach (263,52 μmol/L) and the lowest one in non organic mustard green (168,02 μmol/L). The results of this study indicate that there is no particular type of leaf vegetables that has all the best nutrition value, both organic and non-organic. Pertanian perkotaan dikembangkan agar dapat memiliki kontribusi penting dalam memasok bahan pangan penduduk kota. Salah satu komoditi pertanian perkotaan yang cukup marketable adalah sayuran daun. Sayuran daun adalah sumber protein, vitamin, mineral, dan asam amino esensial paling murah dan tersedia setiap saat. Meskipun komoditi pertanian perkotaan dikembangkan di lahan yang marjinal, namun menghasilkan produk yang cukup baik. Penelitian ini dilakukan untuk membandingkan nilai gizi sayuran daun yang ditanam di pertanian perkotaan kota Surabaya, yaitu kangkung (Ipomea aquatic Forsk), sawi hijau (Brassica rapa), dan bayam (Spinacea oleracea L.), dengan produk serupa yang dihasilkan secara organik. Metode yang digunakan adalah deskriptif kuantitatif. Kandungan klorofil total dan karotenoid diukur dengan menggunakan metode spektrofotometri pada panjang gelombang 480 nm, 645 nm, dan 663 nm. Kandungan vitamin C diukur dengan metode titrasi larutan Dichlorophenol Indophenol (DCPIP). Hasil penelitian menunjukkan sayuran yang ditanam pada pertanian non organik, maupun organik, memiliki kadar air yang cukup  tinggi, yakni lebih dari 80%. Kadar vitamin C tertinggi pada Sawi non organik (2,45 µg/g) dan terendah pada bayam organik (0,68 µg/g).  Kadar klorofil tertinggi pada bayam non organik (23,81 mg/L) dan terendah pada kangkung non organik (3,29 mg/L). Demikian juga kadar karoten tertinggi pada bayam non organik (263,52 μmol/L) dan yang terendah pada sawi non organik (168,02 μmol/L). Hasil penelitian ini menunjukkan bahwa tidak ada jenis sayuran daun tertentu yang memiliki seluruh nilai gizi terbaik, baik yang organik maupun yang non organik.
BIOREMEDIATION OF SODA ASH CONTAMINATED WITH GREASE: THE APPLICATION OF COMPOSTING TECHNOLOGY Susilo, Adhi
Jurnal Matematika Sains dan Teknologi Vol 9 No 2 (2008)
Publisher : LPPM Universitas Terbuka

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

Abstract

Perubahan fisika dan kimia dalam timbunan kompos diteliti selama proses pengomposan limbah pembuatan botol yang terkontaminasi oleh gemuk (grease). Temperature awal menunjukkan peningkatan diikuti oleh penurunan secara bertahap pada akhir proses pengomposan. C:N rasio dan bahan tambahan nampaknya mempunyai pengaruh yang paling nyata dalam memproduksi temperatur tinggi. Proses pengomposan selama lima (5) bulan tidak menghilangkan kontaminan sampai batas yang dipersyaratkan. Oleh karena itu diperlukan waktu tambahan guna mengurangi kontaminan sampai level yang ditetapkan. Proses pengomposan ini berhasil dalam menghasilkan temperatur yang meningkat, namun parameter yang menyebabkan kenaikan temperatur tersebut masih belum jelas.
PEMODELAN DAYA TAHAN BELAJAR MAHASISWA PENDIDIKAN TINGGI JARAK JAUH DENGAN PENDEKATAN REGRESI LOGISTIK BINER (STUDI KASUS: MAHASISWA FAKULTAS EKONOMI JURUSAN MANAJEMEN) Dewi Juliah Ratnaningsih
Jurnal Matematika Sains dan Teknologi Vol. 12 No. 2 (2011)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33830/jmst.v12i2.512.2011

Abstract

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.
PROFIL VEGETASI PEKARANGAN DI DESA JABON MEKAR, KECAMATAN PARUNG, BOGOR Budi Prasetyo
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

Jabon Mekar village is well-known by people as the central of fruit producing at subdistrict of Parung. However it was estimated as a buffer zone of Jakarta and subject of the urban development. The aim of the research is to study the vegetation profile and the tree of model architecture at home-garden of community in the village of Jabon Mekar. The methods used for vegetation analysis were the quadrate method and the vegetation profile architecture method. The result of the vegetation profile at home-garden research shows that according to their formation of canopy coat, there were five stratums. Based on the vertical and horizontal of profile diagram, the dominant species of plants is Gnetum gnemon, with Fagerlind model of architecture; and the co-dominant species of plants is Musa sp., with Tomlinson model of architecture. The domination of these two trees of architecture models will give a limited chance of having an erotion process at the home-garden society.

Page 12 of 41 | Total Record : 403

 10   11   12   13   14 

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