Articles

Performance of Maize Single-Cross Hybrids Evaluated on Acidic Soils Hayati, P.K. Dewi; Sutoyo, Sutoyo; Syarif, A.; Prasetyo, T.
International Journal on Advanced Science, Engineering and Information Technology Vol 4, No 3 (2014)
Publisher : International Journal on Advanced Science, Engineering and Information Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (994.593 KB) | DOI: 10.18517/ijaseit.4.3.390

Abstract

Soil acidity is one of a number of limiting factor of maize production. Planting maize hybrid varieties tolerant to acid soils along with the use of sustainable agronomic practices offers an effective solution for improving maize productivity on acidic soils.  Thirty-six single-cross hybrids derived from a 9x9 diallel cross, nine parental inbred lines and two check varieties i.e. a commercial hybrid and a composite variety Sukmaraga were evaluated in 2013 on acid aluminum-toxic soil at Limau Manis Padang in a randomized compelete block design in order to evaluate and select maize hybrids for high yield potential in acid soils and tolerant to acid soils. Data were subjected to the analysis of variance using the Proc GLM of the SAS software, while analysis of diallel was conducted using DIALLEL-SAS05 software. Results showed that several hybrids which were progenies of crossess between acid soil-tolerant or moderately acid soil-tolerant inbred lines revealed high grain yield on acidic soils. The hybrids also revealed high heterosis magnitudes and high and positive specific combining abilities, low yield reduction and stress sensitivity indices, while they revealed high relative yield and stress tolerance indices. Hence, it is suggested that these promising hybrids can be further evaluated in large scale locational trials on acidic soils.
Analisis Pengaruh Penerapan Sistem Manajemen Mutu ISO 9001:2000 terhadap Kinerja Karyawan (Studi Kasus PT. Brantas Abipraya Wilayah I Medan) Sutoyo, Sutoyo
JURNAL VARIASI Vol 2, No 6 (2011): Vol 2 No 6 Februari 2011
Publisher : JURNAL VARIASI

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Abstract

The application of quality management system in a construction service company is a need to help the company is able to compete and to continuously improve its performance in line with technology development and changes of circumstance. Quality management system of ISO 9001:2000 is an international standard aimed at providing quality guarantee through documented requirements to meet customer’s  satisfaction.The problem of this research is how the application of  ISO 9001:2000 based quality management system including competency, awareness and training, infrastructure and work environment influences the work  performance of the  employees of PT. Brantas Abipraya Regional  I Medan. This research is intended to examine the influence of the application of ISO 9001:2000 based quality management system including competency, awareness and training, infrastructure and work environment on the work performance of the employees of PT. Brantas Abipraya  Regional  I Medan. This research use the theories of production management and human  resources management related to the  ISO 9001:2000 based quality management system including competency, awareness and training, infrastructure and work environment. The descriptive explanatory research uses  survey method in the form of case study and the data obtained were analyzed through multiple linear regression method. The result of this research  shows that there is a simultaneous significant influence beween competency, awareness and training (X1), infrastructure (X2), work environment (X3), upon the employee’s performance (Y), at PT. Brantas  Abipraya Regional  I Medan, at  the level of  confidence of 95. Partially each variable with the level of confidence of 95%  (significance  α = 0.05), has a significant influence on teh employee’s performance
ANALISIS PERFORMANSI PENGGUNAAN SENTRAL TELEPON OTOMATIS (STO) PADA MULTI EXCHANGE AREA (MEA) PEKANBARU (STUDI KASUS PT. TELKOM RIAU DARATAN) Amillia, Fitri; Sutoyo, Sutoyo; Taruna, Brian
Jurnal Sains dan Teknologi Industri Vol 10, No 2 (2013): Juni 2013
Publisher : Fakultas Sains dan Teknologi

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Abstract

Sentral telepon otomatis (STO) merupakan  perangkat switching telekomunikasi sebagai  penyambung dan pemutus  informasi yang kirimkan dengan terpusat dan terdistribusi. Penggunaan STO harus memperhatikan performansi untuk melihat kualitas STO dalam melayani traffic yang ditawarkan. Penelitian ini menganalisis performansi STO host di multi exchange area (MEA) pekanbaru dengan studikasus di PT.Telkom Riau daratan. Hasil pengolahan data traffic outgoing STO host selama setahun  nilai performansi  ASR PBR1 58,05 % dan PBR2 59,28%. Untuk performansi SCH PBR1 6,98 call/sirkit dan PBR2 9,11 call/sirkit. Untuk performansi MHTS PBR1 0,09 menit dan  PBR2 0,97 menit. Untuk performansi OCC PBR1 1,06 % dan PBR2 14,77 %. Untuk performansi sirkit block PBR1 1,32 % dan PBR2 2,02 %. Untuk performansi GOS PBR1 0,42 % dan PBR2 0,41 %.  Nilai performansi ini masih dalam kondisi baik dalam pengoperasion STO karena sesuai dengan standar performansi di PT.Telkom. Performansi STO host PBR2 lebih baik dari STO host PBR1 dikarnakan performansi PBR2 mendekati standar performansi.
Pemodelan Data Statistik Melalui Pendekatan Distribusi Diskrit Sutoyo, Sutoyo
Jurnal Sains dan Teknologi Industri Vol 10, No 1 (2012): Desember 2012
Publisher : Fakultas Sains dan Teknologi

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Abstract

Perkembangan teknologi menempatkan pada penerapan teknologi yang tepat guna yang dapat bemanfaat bagi masyarakat pada umumnya. Salah satu penerapan teknologi khususnya dalam bidang telekomunikasi seperti penerapan sistem komunikasi nirkabel dengan pemanfaatan kanal high frequency (HF) yang dapat digunakan bagi nelayan sebagai sarana untuk berkomunikasi. Untuk menentukan ketersediaan kanal untuk komunikasi suara diperlukan suatu pemodelan terhadap karekteristikdata statistik kanal. Pada tulisan sebelumnya pemodelan dilakukan dengan melakukan pendekatan distribusi gabungan yaitu distribusi kontinu dan distribusi diskrit sehingga menghasilkan model data statistik pemakaian kanal radio HF terdistribusi eksponential. Permasalahan yang terjadi bahwa model yang dihasilkan merupakan distribusi kontinu sedangkan data yang dianalisis merupakan suara hasil sampel yang terdistribusi diskrit. Untuk itu diperlukan pemodelan distribusi diskrit agar model yang didapat disesuaikan berdasarkan input data sebenarnya. Dari hasil pemodelan melalui pendekatan distribusi diskrit diperoleh bahwa data pemakaian kanal radio HF terdistribusi Negative Binomial dengan ketersediaan waktu layanan sebesar 27.9 detik
POTENSI LANSKAPKAWASAN PERKAMPUNGAN TLOGOMAS KOTA MALANG Kota, Wilhelmina Medho; Sutoyo, Sutoyo; Astutik, Astutik
Fakultas Pertanian Vol 1, No 1 (2012)
Publisher : Universitas Tribhuwana Tunggadewi

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Abstract

Green open spaceis dominated by plants which are producers of oxygen (O2) and the ecology cycle stabilizer. Green open space function sustain ecology as balance to city ecosystem.Developmentof the city with uncontrolled population growth tends to change the natural landscape thereby reducing the area of green open space. Green open space is reduced to reduce environmental qualities city residents. Therefore, it takes the role of goverment and increase comfortable and aesthetic area. The study aims ; 1) to knowthe type and amount of vegetation, 2) to know the layout of vegetation,3) to createcool environment and free by air pollution in Tlogomas. The method used was a survey. Results showed Tlogomas Village Lowokwaru Malang City has the potential to support the creation of green open space. The type of vegetation totaling 55 types of vegetation are trees and shrubs. The dominant vegetation types is Bougenvil especlobilisi, Araceae, Orcidaceae, Aglaonema sp, Ceysaltheheum sp, Acaliphamicriphila, Euphorbia, rosa sp, Jasminum sp, Bonsai, and Araceae. The structureof landscape plants that served the aesthetic function of mass, continue, and linier along the way by using a variation of canopy shape, color, and texture of the leaves. The structuring plants grown horizontally along the way and the continuous linear shape. While plant height varied vertically to create an atmosphere of diversity
Phosphate Solubilizing Bacteria Adaptive to Vinasse Muzakhar, Kahar; Sutoyo, Sutoyo; Saragih, Ahmad Bukhari
Journal of Mathematical and Fundamental Sciences Vol 47, No 2 (2015)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (161.009 KB) | DOI: 10.5614/j.math.fund.sci.2015.47.2.8

Abstract

Microorganisms identified as phosphate solubilizing bacteria (PSB) adaptive to vinasse were successfully screened from sugarcane soil from an agriculatural estate in Jatiroto. By conducting a screening on Pikovskaya’s agar medium (PAM), we found that five different isolates were detected as PSB (pvk-5a, pvk-5b, pvk-6b, pvk-7a, and pvk-8a). Of the five isolates only three could be grown and were found to be adaptive to vinasse based medium without any nutrients added (pvk-5a, pvk-5b and pvk-7a). The three isolates were  characterized as coccus and Gram negative with no endospores detected. We suggest that these three isolates can be used as biofertilizer agent to  support organic farming.
Analisis Pembuatan Prototype Penyimpanan Data Pengamatan Stasiun ALE RIAU sutoyo, sutoyo; Putratama, Firman
Seminar Nasional Teknologi Informasi Komunikasi dan Industri 2018: SNTIKI 10
Publisher : UIN Sultan Syarif Kasim Riau

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Abstract

Untuk menghindari terjadinya kehilangan informasi keberhasilan komunikasi radio HF dari stasiun pengamatan Ionosfer yang disebabkan oleh faktor suplai daya listrik dilokasi stasiun serta operator yang bekerja kurang maksimal yang dilakukan secara manual, maka diperlukan sebuah perancangan prototype yang dapat bekerja secara otomatis melakukan penyimpanan data secara otomatis serta mampu terintegrasi dengan software MARS ALE yang dimiliki oleh stasiun. Hasil perancangan bertujuan dapat meminimalisir kehilangan data informasi keberhasilan komunikasi. Penelitian ini merupakan penelitian lanjutan dari penelitian sebelumnya terkait dengan perancangan prototype dalam penyimpanan data stasiun ALE yaitu melakukan analisis hasil kajian pembuatan perancangan prototype penyimpanan data otomatis dalam memperoleh informasi keberhasilan komunikasi kanal Radio HF. Hasil penelitian menunjukkan bahwa hasil perancangan prototype telah mampu melakukan penyimpanan data keberhasilan komunikasi yang ditunjukkan dengan adanya variasi durasi penyimpanan, namun memiliki kekurangan yaitu dapat dilakukan dalam kondisi pengaturan secara manual atau dalam kondisi offline dalam penyesuaian antara perancangan prototype dengan software MARS ALE.
Peramalan Data Parameter Indeks SN Menggunakan Metode ARIMA sutoyo, sutoyo; Tetuko, Bambang; Marsal, Arif; Hidayati, Fitri
Seminar Nasional Teknologi Informasi Komunikasi dan Industri 2018: SNTIKI 10
Publisher : UIN Sultan Syarif Kasim Riau

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Abstract

Pemanfaatan data pengamatan lapisan ionosfer pada stasiun jaringan ALE Nasional seperti jaringan ALE Riau dapat digunakan untuk mengatur penggunaan frekuensi kerja atau dikenal dengan manajemen frekuensi. Keberhasilan dalam komunikasi dapat ditentukan dengan indeks kualitas sinyal signal to noise (SN) dan Bit Error Rate (BER). Penelitian ini akan melakukan peramalan data parameter indeks SN dalam menunjang keberhasilan komunikasi radio HF untuk sirkuit Pekanbaru - Watukosek pada bulan Februari – April 2017. Hasil penelitian diperoleh, model ARIMA untuk indeks SN jam 00.00 – 23.00 WIB yaitu (1,1,1), (1,1,0), (0,1,1), (1,0,0), dan (0,0,1). Hasil peramalan menunjukkan SN pada nilai indeks 4 – 9 dengan kualitas sinyal noisy dan clear. MAPE untuk SN jam 00.00 – 23.00 WIB  berturut-turut pada interval 9% - 34%. Persentase MAPE  paling kecil untuk SN pada jam 10.00 WIB sebesar 9%. Persentase MAPE  paling besar untuk SN yaitu 34% pada pukul 02.00 WIB dan 34% pada pukul 20.00 WIB.
PENGARUH BEBAN KERJA, LINGKUNGAN KERJA DAN MOTIVASI TERHADAP KINERJA PEGAWAI PADA DINAS BINA MARGA PROPINSI SULAWESI TENGAH Sutoyo, Sutoyo
Katalogis Vol 4, No 3 (2016)
Publisher : Katalogis

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.22487/j23022019,2016.v4.i3.6565

Abstract

This research aims to explore and analyze simultaneous and partial impacts of workload, wor environment, and motivation on employee performance in Bina Marga Agency of Centra Sulawesi. It involves 99 employees as respondentsand applies multiple linear regressions analysis with descriptive approach. The results indicate that workload, work environment, and motivation simultaneously and partially have significant influence on employees’ performance in Bina marga Agency of Central Sulawesi.
Efektifitas Atraktan terhadap Lalat Buah Belimbing di Jawa Timur SODIQ, MOCH; SUDARMADJI, SUDARMADJI; SUTOYO, SUTOYO
Agrotrop: Journal on Agriculture Science Vol 5, No 1 (2015)
Publisher : Fakultas Pertanian Universitas Udayana

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Abstract

Effectiveness of Attractants to Star Fruit Flies in East Java. Fruit flies have become one of the important pests in plants carambola (Averrhoa carambola L.). In order to overcome the attack of fruit flies, always wrap the fruit growers and install attractant methyl eugenol atcarambola crop during the flowering plants to the star fruit is harvested, but the results are not optimal in controlling fruit flies, making it necessary to find other ways to control the star fruit flies were more effective. The research objective was to test the effectiveness of a combination of substances towing / attractants, feeding stimulants odor, color and volume to a fly attractant a star fruit. Research was conducted on land farmers in Blitar and Tuban. As for knowing the type of fruit flies that attack the star fruit, be identified in laboratory Plant Pests. Research using completely randomized design and each treatment was repeated 4 times. Parameters measured were the type, number, and trapped fruit fly sex attractant. Results of the study is a combination of the type of attractant M. bracteata, stimulating smell of guavajuice feed, as well as yellow and a volume of 1.5 ? most effective attractant to lure star fruit fly males and females. The fruit flies were trapped only one type that is Bactrocera carambolae.