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REGRESI LINIER FUZZY PADA DATA TIME SERIES

Gamatika Vol 3, No 1 (2012): GAMATIKA
Publisher : Gamatika

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Abstract

Abstrak Perkembangan teori dan aplikasi logika fuzzy cukup luas pada berbagai bidang, selain pada model regresi, teori dan aplikasi logika fuzzy juga berkembang pada metode peramalan data time series yang disebut dengan fuzzy time series. Pada penelitian ini dilakukan pengkajian dan penggabungan keunggulan dari regresi fuzzy dan metode Autoregressive (AR). Keuntungan dari menggunakan metode ini adalah dihasilkan interval (upper bound dan lower bound) pada hasil ramalan, sehingga dapat digunakan dalam pengambilan keputusan baik pada kemungkinan yang terbaik atau terburuk. Kata Kunci : Konsep Fuzzy, Autoregressive, Regresi Abstract The development of the theory and applications of fuzzy logic is quite wide in various fields, in addition to the regression model, the theory and application of fuzzy logic is also developed in time series forecasting method called fuzzy time series. In this research, assessment and incorporation advantage of fuzzy regression and autoregressive method (AR). The advantage of using this method is generated interval (upper bound and lower bound) on the results of the forecast, so it can be used in decision-making in both the best and worst possibilities. Key Words : Fuzzy Concept, Autoregressive, Regression

Analisis Potensi Lorong Pengatus Dangkal untuk Percepatan Jadwal Tanam Palawija di Tanah Sawah

Agritech Vol 35, No 4 (2015)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

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Abstract

Installing shallow mole drainage in paddy soil can increase the rate of lowering soil moisture into such a condition which is suitable for the early growth of non-rice crops. This study aimed to analyze the shallow mole drainage installation potential to plant crops early in paddy soil. The study was conducted in a laboratory scale using a soil bin, a model of mole plow, and soil kept homogeneous in boxes. The experiment was conducted at the Laboratory for Energy and Agricultural Machinery, Agricultural Engineering Department, Faculty of Agricultural Technology Universitas Gadjah Mada, Yogyakarta. Mole drainage was installed in 2 paddy soils, with different clay content, namely; 41.17% (soil B) and 53.36% (soil C). Soil moisture content was measured periodically by using gypsum blocks. The analysis showed that the mole drainage installed in soil B was able to speed up the time taken to reach field capacity. At the distance horizontally to the center of mole drainage (x) = 6.5 cm with the depth (z) =5 cm took 72 hours faster than the control. At z =10 needed 92 hours, at z = 15 cm needed 154 hours faster than the control. At the distance horizontally to the center of mole drainage (x) = 11.5 with z = 5 cm took 52 hours, with z = 10 cm took 161 hours, with z = 15 cm took 150 hours faster than the control. The installation of mole drainage in soil C was also able to speed up the time required to reach field capacity. At the distance horizontally to the center of mole drainage (x) = 6.5 cm with the depth (z) = 5 cm took 165 hours, with z = 10 cm took 184 hours, with z = 15 cm took 200 hours faster than the control. At x = 11.5 with z = 5 cm took 144 hours, with z = 10 cm took 154 hours, with z = 15 cm took 192 hours faster than the control. The lesser time required to reach field capacity indicated that mole drainage installed in soil B and C was potential to plant crops early in paddy soil.ABSTRAKLorong pengatus dangkal di lahan sawah berfungsi meningkatkan laju penurunan lengas tanah di lapisan olah, sehingga kondisi tanah yang sesuai untuk pertumbuhan awal tanaman palawija dapat segera tercapai. Penelitian ini bertujuan untuk menganalisis potensi pembentukan lorong pengatus terhadap peluang percepatan jadwal tanam palawija di tanah sawah. Penelitian dilakukan dalam skala laboratorium dengan menggunakan soil bin, model bajak lorong, dan tanah di dalam boks yang dijaga homogenitasnya. Penelitian dilaksanakan di Laboratorium Energi dan Mesin Pertanian, Jurusan Teknik Pertanian, Fakultas Teknologi Pertanian Universitas Gadjah Mada, Yogyakarta. Lorong pengatus dibuat pada 2 jenis tanah sawah bertekstur lempung, dengan kadar lempung yang berbeda, yaitu 41,17% (tanah B) dan 53,36% (tanah C). Pengukuran kadar lengas tanah dilakukan secara periodik menggunakan gypsum blok. Hasil penelitian menunjukkan bahwa pembentukan lorong pengatus pada tanah B dapat mempercepat waktu yang dibutuhkan untuk mencapai kapasitas lapang. Pada jarak horisontal dari pusat lorong (x)=6,5 cm dengan kedalaman (z)=5cm, membutuhkan waktu 72 jam lebih cepat dibanding kontrol, pada z=10 cm membutuhkan 192 jam, pada z=15 cm membutuhkan154 jam lebih cepat dibanding kontrol. Pada x=11,5 membutuhkan waktu 52 jam (z=5cm), 161 jam (z=10 cm), 150 jam (z=15 cm) lebih cepat dibanding kontrol. Pembentukan lorong pengatus pada tanah C juga dapat mempercepat waktu yang dibutuhkan untuk mencapai kapasitas lapang. Pada x=6,5 cm, membutuhkan waktu 165 jam (z=5cm), 184 jam (z=10 cm), 200 jam (z=15 cm) lebih cepat dibanding kontrol. Pada x=11,5 membutuhkan waktu 144 jam (z=5cm), 156 jam (z=10 cm), 192 jam (z=15 cm) lebih cepat dibanding kontrol. Menurunnya waktu yang dibutuhkan untuk mencapai kapasitas lapang menunjukkan bahwa pembentukan lorong pengatus di tanah B dan C berpotensi untuk mempercepat jadwal tanam palawija.

The Clay Content Effect on The Formation of Shallow Mole Drainage and The Rate of Lowering Soil Moisture Content

Agritech Vol 34, No 3 (2014)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

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Abstract

Installing shallow mole drainage in the soil is infl uenced by various factors, namely; the physical properties of soil and tools which are used. One of the physical properties of soil that infl uences the formation of the mole drainage is the clay content of soil. This study aimed to explore the condition of the mole drainage formed in paddy soil with different clay contents. The study was conducted in a laboratory scale using a soil bin, a model of mole plough, and soil which was kept homogeneous in the boxes. The experiment was conducted at the Laboratory for Energy and Agricultural Engineering, Agricultural Engineering Department, Universitas Gadjah Mada, Yogyakarta. Mole drainage was installed in 3 paddy soils with different clay content, namely; 13.12% (soil A; loam soil), 41.17% (soil B; clay soil) and 53.36% (soil C; clay soil). The study was conducted by analyzing the geometry of the mole drainage and observing the soil deformation which occurred due to the formation of the mole drainage. The study showed that perfect mole drainages were installed in all of those three types of soil. The mole drainages were quite good and stable with little cracks. Based on the soil crack and fi ssuring of soil, the largest soil deformation has occurred in soil with the highest clay content and the smallest one in soil with the lowest clay content. The characteristics of those three installed mole drainages were almost the same, but they had different effect on the rate of lowering soil moisture content. Here, the mole drainage installed in loam soil is different from which of installed in clay soil. The mole drainage installed in the loam soil did not infl uence the rate of lowering soil moisture content. Contrary, the mole drainage installed in clay soil has effected to increase the rate of lowering soil moisture content.

SISTEM INFORMASI PRODUK DAN DATA CALON JAMAAH HAJI DAN UMROH PADA PT. TRAVELLINDO LUSIYANA BANJARMASIN BERBASIS WEB

POSITIF Vol 1, No 1 (2015): POSITIF - Jurnal Sistem dan Teknologi Informasi
Publisher : POSITIF

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Abstract

Sebaran Lengas Tanah Akibat Pembuatan Lorong Pengatus Dangkal pada Tanah Sawah

Agritech Vol 33, No 3 (2013)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

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Abstract

Mole drainage is an alternative which can be used to increase the rate of soil moisture decrease in paddy soil at the end of the rainy season. By using mole drainage, the rate of soil moisture decrease goes up to a certain condition (from saturated to field capacity) which is suitable for early growth of crops. This study aimed at describing changes and distribution of soil moisture in paddy soil in which shallow mole drainage had been formed. Those changes and distribution were used to predict the rate of soil moisture decrease in paddy soil after mole drainage was formed. The study was conducted in the laboratory using a soil bin, a model of mole plough, and soils that was kept homogeneous in the boxes. The experiment was conducted in the Laboratory of Energy and Agricultural Engineering, Agricultural Engineering Department, Gadjah Mada University. The mole drainage was installed in three paddy soils with different clay content, namely 13.12% (A), 41.17% (B) and 53.36% (C). Soil moisture content was measured periodically by using gypsum blocks. The results showed that the three types of soils in which shallow mole drainage was formed had different characteristics of soil moisture changes. The formation of mole drainage in soil with low clay content (A) had no effect for the declining rate of soil moisture. On the contrary, the shallow mole drainage formed in the soil with higher contents of clay B and C influenced the rate of soil moisture decrease. High rate of soil moisture decrease in the soil B and C occurred at the beginning of the formation of mole drainage and went on up to the 3th hours of observation. Based on the distribution of soil moisture at different points at some distances from the center of mole drainage and the equation of the rate of soil moisture decrease found in the experiment, it could be inferred that moles formed in soils B and C could be used as mole drainage and the rate of soil moisture decrease in soil C was cumulatively higher than in soil B.ABSTRAKLorong pengatus merupakan salah satu alternatif guna mengatasi lamanya masa tunggu tanam palawija di lahan sawah pada akhir musim penghujan akibat kadar lengas tanah yang terlalu tinggi. Lorong pengatus dibuat untuk mempercepat laju penurunan kadar lengas sehingga sesuai untuk pertumbuhan awal tanaman palawija. Penelitian ini bertujuan mendeskripsikan perubahan dan sebaran lengas tanah yang terjadi akibat pembentukan lorong pengatus dangkal, untuk digunakan sebagai salah satu dasar memperhitungkan laju penurunan kadar lengas yang terjadi pada tanah sawah yang dibuat lorong pengatus. Penelitian dilakukan dalam skala laboratorium dengan menggunakan soil bin, model bajak lorong, dan tanah di dalam boks yang dijaga homogenitasnya. Penelitian dilaksanakan di Laboratorium Energi dan Mesin Pertanian, Jurusan Teknik Pertanian, FTP-UGM. Lorong pengatus dibuat pada 3 jenis tanah sawah dengan kadar lempung yang berbeda, yaitu 13,12% (tanah A), 41,17% (tanah B) dan 53,36% (tanah C). Pengukuran kadar lengas tanah dilakukan secara periodik menggunakan gypsum blok. Hasil penelitian menunjukkan bahwa ketiga jenis tanah yang dibuat lorong pengatus mempunyai karakteristik perubahan lengas tanah yang berbeda, Pembentukan lorong pengatus pada tanah dengan kadar lempung rendah (tanah A) tidak memberikan pengaruh terhadap laju penurunan lengas tanah, tetapi pada tanah dengan kadar lempung tinggi (tanah B dan C) berpengaruh terhadap laju penurunan lengas tanah. Laju penurunan lengas tanah kumulatif yang tinggi terjadi pada awal pembentukan lorong sampai 30 jam pasca pembentukan lorong. Dari distribusi lengas tanah pada jarak yang berbeda dari pusat lorong dan dari persamaan laju penurunan lengas hasil eksperimen, lorong yang dibuat pada tanah B dan C dapat berfungsi sebagai lorong pengatus. Peningkatan laju penurunan lengas tanah kumulatif tanah C lebih besar dibanding  tanah B.

PENGELOLAAN PROSES PEMBELAJARAN PENDIDIKAN KARAKTER DI SEKOLAH DASAR

Indonesian Journal of Curriculum and Educational Technology Studies Vol 3 No 1 (2015): April 2015
Publisher : Curriculum and Educational Technology Department

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Abstract

Dengan menggunakan pendekatan kualitatif penelitian ini fokus pada pengelolaan pendidikan karakter pada proses pembelajaran yang mencakup beberapa aspek yaitu proses perencanaan, pelaksanaan dan evaluasi. Hasil penelitian menunjukkan bahwa pengelolaan pendidikan karakter sudah diimplemetasikan dengan baik meskipun terdapat beberapa kendala. Proses perencanaan pembelajaran di SD Negeri Sendang dilaksanakan oleh tim penyusun kurikulum, terdiri dari kepala sekolah dan guru untuk menyusun silabus dan rencana pelaksanaan pembelajaran. Guru berperan sebagai pelaksana dan evaluator pendidikan karakter. Beberapa kendala yaitu keterbatasan waktu dan media. Dalam hal ini tiap guru bertanggung jawab atas pelaksanaan pendidikan karakter di sekolah. Solusi yang dilakukan dapat melalui catatan BK maupun berkonsultasi langsung kepada orang tua untuk mengetahui karakter atau sikap anak ketika di rumah.By employing qualitative research approach focusing on the management of learning process of character education including several aspects, i.e. the pro-cess of planing, implementation, and evaluation. The research result show that the management of character education has been implemented well while still leaving several obstacles. The process of lesson planning was conducted by curriculum designer team that consists of principals and teachers to develop syllabus and lesson plan. Teacher act as implementers and evaluators of character education. Several obstacles are the limitations of time and media. In this case each teacher have a responsibility on the implemen-tation of character education in school. The solution to solve its are trough the counseling records or direct consultation to the parents to find out the student characters at home.

Analisis Kinerja Mesin Pengupas Lada (Piper Nigrum L.) Tipe Silinder Putaran Vertikal

Agritech Vol 31, No 2 (2011)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

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Abstract

White pepper is produced by decorticating the pericarp of the pepper which commonly be done manually or mechani­ cally. A pepper decorticator without soaking process was developed in order to improve quality and capasity of decor­ tication. The decortication mechanism was designed by shearing the pepper on a gap between a static vertical cylinder and a vertical axis rotating tube. This research was done to analyze the decortication and working performances of the machine. Dimension analysis approach was applied in order to develope a mathematical relation to be used for prediction of the machine performance based on their design and operational variables. The machine variables varied were linear speed of tube (v), width of clearance (s), and length of rotated cylinder (L). The material variables were diameter of pepper (D ), decortication force (F ), and density of pepper (ρ ). From the analysis result, there were de­bkbfined mathematical equations for prediction of decorticated pepper (p ), damaged pepper (p ) and working capacity ofkrthe machine (K ). Validation analysis shows that the equations could be used for prediction and determination of themachine performances needed.ABSTRAKLada putih dihasilkan melalui proses pengupasan kulit lada yang dilakukan secara manual atau mekanis. Untuk meng­ atasi masalah rendahnya kapasitas dan kualitas pengupasan telah dikembangkan rancangbangun mesin pengupas kulit lada dengan sistem gesekan pada silinder dengan putaran poros secara vertikal tanpa melalui proses perendaman. Penelitian ini dilakukan untuk menganalisis kinerja pengupasan, kerusakan dan kapasitas kerja mesin. Pendekatan analisis dimensi diterapkan untuk mendapatkan persamaan matematis yang dapat digunakan untuk memprediksi dan merencanakan kinerja mesin berdasarkan variabel rancangbangun dan operasionalnya. Variabel bebas mesin yang di­ variasikan meliputi kecepatan linier silinder (v), lebar celah (s) dan panjang silinder pengupas (L). Variabel bahan yang dipertimbangkan meliputi diameter bahan (D ), gaya pengupasan (F ), dan massa jenis bahan (ρ ). Dari hasil analisis te­bkblah diperoleh persamaan prediksi kinerja mesin yaitu persentase pengupasan (p ), persentase kerusakan (p ) dan kapasi­krtas kerja mesin (K ). Analisis kesesuaian menunjukkan bahwa pada batas keberlakuannya persamaan­persamaan yangdiperoleh dapat diterima dan dapat digunakan untuk memprediksi dan merencanakan kinerja mesin yang diinginkan.

Aspek Mekanika Tanah dalam Interaksi Mesin-Tanah (Part II)

Agritech Vol 9, No 4 (1989)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

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Abstract

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Aksi Roda dan Efek Pemadatannya Pada Tanah

Agritech Vol 11, No 3 (1991)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

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Abstract

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Aspek Mekanika Tanah dalam Interaksi Mesin-Tanah Part III (terakhir)

Agritech Vol 10, No 1 (1990)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

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Abstract

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