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Your search keyword '"Dedy D. Prastyo"' showing total 4 results
Start Over Author "Dedy D. Prastyo" Publication Year Range Last 50 years
4 results on '"Dedy D. Prastyo"'

1. Modelling causality between agricultural and meteorological drought indices in the Corong River basin, East Java Indonesia

Author

Nur A. Affandy, Data Iranata, Nadjadji Anwar, Mahendra A. Maulana, Dedy D. Prastyo, Lalu M. Jaelani, and F.X. Suryadi

Subjects
drought, river basin, standard normalisation difference vegetation index ndvi, andardised precipitation evapotranspiration index spei, time series regression, River, lake, and water-supply engineering (General), TC401-506, Irrigation engineering. Reclamation of wasteland. Drainage, TC801-978
Abstract

The Lamongan Regency is an area in East Java, Indonesia, which often experiences drought, especially in the south. The Corong River basin is located in the southern part of Lamongan, which supplies the irrigation area of the Gondang Reservoir. Drought monitoring in the Corong River basin is very important to ensure the sustainability of the agricultural regions. This study aims to analyse the causal relationship between meteorological and agricultural drought indices represented by standardised precipitation evapotranspiration index ( SPEI) and standard normalisation difference vegetation index ( NDVI), using time series regression. The correlation between NDVI and SPEI lag 4 has the largest correlation test results between NDVI and SPEI lag, which is 0.41. This suggests that the previous four months of meteorological drought impacted the current agricultural drought. A time series regression model strengthens the results, which show a causal relationship between NDVI and SPEI lag. According to the NDVI–SPEI-1 lag 4 time series model, NDVI was influenced by NDVI in the previous 12 periods, and SPEI-1 in the last four periods had a determinant coefficient value of 0.4. This shows that the causal model between SPEI-1 and NDVI shows a fairly strong relationship for drought management in agricultural areas (irrigated areas) and is considered a reliable and effective tool in determining the severity and duration of drought in the study area.

Published
2023
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2. Mixed Spline Smoothing and Kernel Estimator in Biresponse Nonparametric Regression

Author

Dyah P. Rahmawati, I. N. Budiantara, Dedy D. Prastyo, and Made A. D. Octavanny

Subjects
Mathematics, QA1-939
Abstract

Mixed estimators in nonparametric regression have been developed in models with one response. The biresponse cases with different patterns among predictor variables that tend to be mixed estimators are often encountered. Therefore, in this article, we propose a biresponse nonparametric regression model with mixed spline smoothing and kernel estimators. This mixed estimator is suitable for modeling biresponse data with several patterns (response vs. predictors) that tend to change at certain subintervals such as the spline smoothing pattern, and other patterns that tend to be random are commonly modeled using kernel regression. The mixed estimator is obtained through two-stage estimation, i.e., penalized weighted least square (PWLS) and weighted least square (WLS). Furthermore, the proposed biresponse modeling with mixed estimators is validated using simulation data. This estimator is also applied to the percentage of the poor population and human development index data. The results show that the proposed model can be appropriately implemented and gives satisfactory results.

Published
2021
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4. PENGUATAN KAPASITAS PEREMPUAN MELALUI KEWIRAUSAAN ECOPRINT

Author

Setiawan Setiawan, Djoko Kuswanto, Muhammaf Sjahid Akbar, Dedy D. Prastyo, Santi Puteri Rahayu, Neni Alya Firdausanti, and Ahmad Saikhu

Abstract

Adanya kewajiban dosen (Perguruan Tinggi) untuk pengabdian kepada masyarakat, KKN mahasiswa , serta Program pemerintah kota Surabaya untuk pengentasan Masyarakat Berpenghasilan Rendah (MBR), merupakan tantangan bagi Perguruan Tinggi untuk berpartisiasi. Di sisi lain, salah satu kerajinan yang sedang booming adalah ecoprint. Beberapa alasannya adalah : (i) proses produksi tidak terlalu sulit, tidak sesulit membatik, serta (ii) di wilayah Kelurahan Keputih kaya akan tanaman yang daunnya dapat digunakan untuk produksi ecoprint. Tim Pengabdian Masyarakat ITS menggandeng UMKM Sinawa Ecoprint dan Any’s Art & Craft untuk memberdayakan ibu-ibu rumah tangga (pemberdayaan Wanita) warga Kelurahan Keputih, khususnya Masyarakat Berpenghasilan Rendah. Kegiatan ini meliputi pelatihan produksi ecoprint, dilanjutkan dengan mengadopsi konsep sistem intiplasma, UMKM Sinawa Ecoprint dan Any’s Art & Craft sebagai inti yang akan menyediakan sarana produksi, menampung dan memasarkan hasil kerajinan ecoprint ibu-ibu rumah tangga warga Keputih, secara berkelanjutan. Setelah ibu-ibu rumah tangga terampil menghasilkan ecoprint, mereka dapat mejual hasil ecoprint, sehingga mendapatkan tambahan penghasilan bagi keluarga. Selain itu, dampak kegiatan ini diharapkan turut serta berperan dalam upaya PEMKOT Surabaya untuk pengentasan kemiskinan melalui pemberdayaan wanita. Kata Kunci : pemberdayaan wanita; ecoprint; inti-plasma; berkelanjutan; MBR ABSTRACTThe existence of the obligation of lecturers (Universities) for community service, student community service activities (KKN), and the Surabaya city government program for alleviating Low-Income Communities (MBR), is a challenge for universities to participate. On the other hand, one of the booming crafts is ecoprint. Some of the reasons are: (i) the production process is not too difficult, not as difficult as batik, and (ii) the Keputih Village area is rich in plants whose leaves can be used for ecoprint production. The ITS Community Service Team collaborates with the Sinawa Ecoprint and Any's Art & Craft SMEs to empower housewives (Women Empowerment) residents of Keputih Village, especially Low-Income Community. This activity includes training on ecoprint production, followed by adopting the concept of the nucleus plasma system, the MSME Sinawa Ecoprint and Any's Art & Craft as the core which will provide production facilities, accommodate and market the ecoprint handicrafts of Keputih housewives, in a sustainable manner. After skilled housewives produce ecoprints, they can sell the ecoprints, thereby earning additional income for the family. In addition, the impact of this activity is expected to play a role in the Surabaya City Government's efforts to alleviate poverty through empowering women. Keywords: women empowerment; ecoprints; nucleus-plasma system; sustainable; low-income community

Published
2022
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