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All Journal EKUIVALEN - Pendidikan Matematika JURNAL ILMIAH GEOMATIKA AGRINESIA: Jurnal Ilmiah Agribisnis JURNAL GIZI DAN KESEHATAN Jurnal Sistem Informasi dan Manajemen LIMNOTEK Jurnal Mahasiswa Manajemen, Bisnis, Enterpreneurship
Dian Ratnasari
Program Studi Teknik Industri, Fakultas Teknik, Universitas Diponegoro
Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Materials Science & Nanotechnology Mathematics Public Health Other

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EKSTRAKSI KANDUNGAN AIR KANOPI DAUN TANAMAN PADI DENGAN DATA HYPERSPECTRAL Wibowo, Agus; Ratnasari, Dian; Sukojo, Bangun Muljo; Harianto, Teguh; Djajadihardja, Yusuf S.
GEOMATIKA Vol 16, No 1 (2010)
Publisher : Badan Informasi Geospasial in Partnership with MAPIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (521.784 KB) | DOI: 10.24895/JIG.2010.16-1.12

Abstract

The spectral reflectance of leaves from several paddy stumps in irrigated rice area of Indramayu - West Java Province was measured with field spectrometer which has wavelength range 350-2500 nm and spectral resolution of 1 nm. The measurement was performed from a distance of 10 cm (FS10) and 50 cm (FS50) of rice leaf canopy surface. Measurement point is selected such that represent different stages of rice growth i.e. vegetative, reproductive and ripening. Meanwhile, a airborne survey with hyperpectral mapper (HYMAP) sensor is done over the same area. The HYMAP sensor has wavelength length from 400-2500nm, 128 channels, 10-20 nm spectral resolution, and 4.5 m spatial resolution. Clumps of rice that has been measured withdrawn and separated into the leaf, stem and panicle. Those sample are weighed as fresh weight and then dried in the laboratory until the temperature of 60 ° C. The canopy water content is the difference between fresh weight and dry weight. Linear regression modeling is performed to find the relationship between canopy water content (CWC) with water index (R900/R970) and the normalised difference water index (R860-R1240)/(R860-R1240). To obtain a good model of cross-validation process is carried out by separating 30% of data randomly for validation and the remaining 70% is used to build the regression model. Furthermore, the resulting model is validated with 30% of data, good model selected by the criteria of a maximum of R2 model and the RMSE of cross validation (RMSEVC) minimum. Selected regression model was applied to the data HYMAP to create distribution maps of canopy water content. Results show that both spectral indices shows a positive correlation and also sensitive to changes in water content that make the detection of canopy water content is possible. Selected model that can be used are (1) CWC = 13078.0 * WI - 13183.00 (R2 = 0:58, RMSECV = 499.13) and (2) CWC = 7157.4 * NDWI + 396.26 (R2 = 0:51, RMSECV = 640.84). Selected model is implemented with HYMAP data to produce a canopy water content distribution map. The result shows that both spectra indices has a negative value that represent a dry land. High spectral indices value also identified in a vegetative growth stage which is sparse rice canopy and mixed with water or soil background. Wider implementation should be done cautiously and need improvements to accommodate the level of the leaf canopy cover.Keywords: Remote Sensing, Hyperspectral, Paddy/Rice, Canopy Water Content, HYMAP, Field Spectrometer.
ANALISIS HUBUNGAN MANAJEMEN USAHATANI PADI SAWAH DENGAN TINGKAT KEBERHASILAN GAPOKTAN SERUMPUN (Studi Kasus Gapoktan Serumpun Kota Gorontalo) Ratnasari, Dian; Rauf, Asda; Boekoesoe, Yuriko
AGRINESIA : Jurnal Ilmiah Agribisnis VOL 2, NO 1, 2017
Publisher : AGRINESIA : Jurnal Ilmiah Agribisnis

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (560.831 KB)

Abstract

This research aims to analyze the implementation of management of rice field paddy farming business at Gapoktan Serumpun, City of Gorontalo and the relation between management of rice field paddy farming business with level of successfulness of Gapoktan Serumpun, Village of Dembe Jaya, Sub-district of Kota Utara, City of Gorontalo, Province of Gorontalo. This research is conducted at Gapoktan Serumpun, Village of Dembe Jaya, Sub-district of Kota Utara, City of Gorontalo from April to June 2017 with 48 farmers as research samples. This research applies survey method. Research data are analyzed by descriptive analysis with percentage formula and Pearson Correlation analysis. Research finding reveals that based on assessment of farmer group and farmer as individual, management of rice field paddy farming business Gapoktan Serumpun, Village of Dembe Jaya, Sub-district of Kota Utara, City of Gorontalo remains in Very Good category with percentage value of 87% and 85%. Meanwhile, success of Gapoktan Serumpun, Village of Debe Jaya, Sub-district of Kota Utara, City of Gorontalo as learning unit, cooperation unit and production unit as well as enterprise unit shows good category with value of percentage of 81%. Then, finding of research about relation between management of farming business with level of successfulness of Gapoktan Serumpun shows there is relation of 0.70 at level of failure for 0.01 and it is included in category of strong relation.
KETERKAITAN KEMAMPUAN KOMUNIKASI MATEMATIS TERHADAP PRESTASI BELAJAR SISWA SMP NEGERI 31 PURWOREJO Ratnasari, Dian
EKUIVALEN - Pendidikan Matematika Vol 24, No 1 (2016): EKUIVALEN
Publisher : Universitas Muhammadiyah Purworejo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (70.872 KB)

Abstract

Penelitian ini bertujuan untuk mengetahui kemampuan komunikasi matematis siswa terhadap prestasi belajar siswa kelas VIII. Jenis penelitian ini adalah penelitian kualitatif. Subjek dalam penelitian ini adalah siswa kelas VIII SMP Negeri 31 Purworejo. Penentuan subjek menggunakan teknik purposive sampling yang bersifat snowball sampling. Teknik pengumpul-an data yang dipakai adalah teknik observasi, teknik wawancara dan tes. Pemeriksaan validitas data dilakukan dengan triangulasi metode. Tahapan analisa data yaitu data reduction, data display dan conclusion drawing/verification. Dari Hasil analisis diperoleh bahwa siswa dengan kemampuan komunikasi matematis yang tinggi menghasilkan prestasi belajar yang tinggi. Siswa tersebut ketika diberi soal atau permasalahan akan berusaha menyelesaikannya sendiri dan hasilnya hampir semuanya benar. Selain itu, ketika diwawancara pun siswa tersebut mampu menjawabnya dengan tepat. Kemudian, siswa dengan kemampuan komunikasi matematis yang rendah menghasilkan prestasi belajar yang tinggi dan prestasi belajar yang rendah, siswa dengan prestasi tinggi ketika diberi soal atau permasalahan hasilnya hampir semuanya terjawab dengan benar dan siswa yang mempunyai prestasi belajar rendah ketika diberi soal hasilnya masih belum tepat, dan ketika diwawancara siswa tersebut belum bisa menjawab dengan benar dan tepat.   Kata kunci: komunikasi matematis, prestasi belajar
ANALISIS HUBUNGAN MANAJEMEN USAHATANI PADI SAWAH DENGAN TINGKAT KEBERHASILAN GAPOKTAN SERUMPUN (Studi Kasus Gapoktan Serumpun Kota Gorontalo) Ratnasari, Dian; Rauf, Asda; Boekoesoe, Yuriko
Agrinesia: Jurnal Ilmiah Agribisnis VOL 2, NO 1, 2017
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (560.831 KB)

Abstract

This research aims to analyze the implementation of management of rice field paddy farming business at Gapoktan Serumpun, City of Gorontalo and the relation between management of rice field paddy farming business with level of successfulness of Gapoktan Serumpun, Village of Dembe Jaya, Sub-district of Kota Utara, City of Gorontalo, Province of Gorontalo. This research is conducted at Gapoktan Serumpun, Village of Dembe Jaya, Sub-district of Kota Utara, City of Gorontalo from April to June 2017 with 48 farmers as research samples. This research applies survey method. Research data are analyzed by descriptive analysis with percentage formula and Pearson Correlation analysis. Research finding reveals that based on assessment of farmer group and farmer as individual, management of rice field paddy farming business Gapoktan Serumpun, Village of Dembe Jaya, Sub-district of Kota Utara, City of Gorontalo remains in Very Good category with percentage value of 87% and 85%. Meanwhile, success of Gapoktan Serumpun, Village of Debe Jaya, Sub-district of Kota Utara, City of Gorontalo as learning unit, cooperation unit and production unit as well as enterprise unit shows good category with value of percentage of 81%. Then, finding of research about relation between management of farming business with level of successfulness of Gapoktan Serumpun shows there is relation of 0.70 at level of failure for 0.01 and it is included in category of strong relation.
HUBUNGAN ANTARA DEMI SPAN (SETENGAH RENTANG LENGAN) DENGAN TINGGI BADAN PADA DEWASA MUDA Ratnasari, Dian; Pontang, Galeh Septiar; Purbowati
JURNAL GIZI DAN KESEHATAN Vol 11 No 26 (2019): JURNAL GIZI DAN KESEHATAN
Publisher : UNIVERSITAS NGUDI WALUYO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35473/jgk.v11i25.18

Abstract

Background : Anthropometric measurements such as body height are important to determine energy requirements. Under certain conditions, a person cannot actually measure body height so that another of alternative measurement is needed.Demi span (half of arm span) is one of the long bones that is closest to estimate body height. Objective : The objectiveof the study isto analyze the relation between demi span with body height in young adult. Method : The type of research wasdescriptive correlation with cross sectional approach. Samples were students of Health Faculty and Nursing Faculty of Ngudi Waluyo University. There are 303 respondents for this researchtaken by disproportionate random sampling method. Demi span measured using a metline with accuracy of 0,1 cm and body height measured using microtoise with accuracy of 0,1 cm. The bivariate analysis usedSpearman Rank correlation test (α = 0.05). Result: The average demi span lengthmalerespondentsis 79.1 ± 3.34 cm and female is 72.2 ± 3 cm. Theaverage male body height is166.1 ± 5.7 cm and female 154.2 ± 4.9 cm. There is a relation between demi span andheight in young adult (p=0,0001) with a strong relationship (r=0,793). Conclusion : There is a relation between demi span andbody height in young adul Abstrak : Latar Belakang: Pengukuran antropometri seperti tinggi badan penting dilakukan untuk menentukan kebutuhan energi. Pada kondisi tertentu, seseorang tidak dapat diukur tinggi badan secara aktual sehingga diperlukan pengukuran alternatif lain. Demi span (setengah rentang lengan) merupakan salah satu tulang panjang yang paling mendekati untuk memperkirakan tinggi badan. Tujuan: Untuk mengetahui hubungan antara demi span dengan tinggi badan pada dewasa muda. Metode: Jenis penelitian ini adalah deskriptif korelasi dengan pendekatan cross sectional. Sampel adalah mahasiswa Fakultas Ilmu Kesehatan dan Fakultas Keperawatan Universitas Ngudi Waluyo. Jumlah sampel penelitian ini yaitu 303 responden diambil dengan metode disproportionate random sampling. Demi span diukur menggunakan metline dengan ketelitian 0,1 cm dan tinggi badan diukur menggunakan microtoise dengan ketelitian 0,1 cm. Analisis bivariat menggunakan uji korelasi Spearman Rank (α=0,05). Hasil: Rerata panjang demi span laki-laki 79,1 ± 3,34 cm dan perempuan 72,2 ± 3 cm. Rerata tinggi badan laki-laki 166,1 ± 5,7 cm dan perempuan 154,2 ± 4,9 cm. Terdapat hubungan antara demi span dengan tinggi dengan tinggi badan pada dewasa muda (p=0,0001) dengan keeratan hubungan kuat (r=0,793) Simpulan: Terdapat hubungan antara demi span dengan tinggi badan
MEMBANGUN SISTEM PENGELOLAAN STRES KERJA YANG EFEKTIF BAGI SOPIR BUS PT. HARAPAN JAYA PRIMA Ratnasari, Dian
JIMBIEN : JURNAL MAHASISWA MANAJEMEN, BISNIS, ENTREPRENEURSHIP Vol. 3 No. 2 (2024)
Publisher : Universitas Tulungagung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36563/jimbien.v3i2.1363

Abstract

Penelitian ini bertujuan untuk menganalisis penyebab dan strategi pengelolaan stres kerja pada sopir bus PT Harapan Jaya Prima Tulungagung. Dengan menggunakan pendekatan kualitatif dan analisis tematik, penelitian ini mengidentifikasi tiga faktor utama penyebab stres kerja: faktor organisasi, individu, dan lingkungan. Hasil penelitian menunjukkan bahwa strategi pengelolaan stres yang diterapkan perusahaan, seperti kegiatan keagamaan dan pemberian insentif, efektif dalam mengurangi tingkat stres. Namun, sopir bus mengusulkan perlunya tambahan program seperti olahraga bersama dan acara keluarga untuk meningkatkan kesejahteraan mereka. Penelitian ini merekomendasikan penguatan strategi pengelolaan stres melalui pendekatan holistik yang melibatkan kegiatan fisik, sosial, dan teknologi untuk menciptakan lingkungan kerja yang lebih sehat dan produktif.
Groundwater Potential Assessment in the Semarang-Demak Basin Using Geospatial and Multi-Criteria Analysis Ardiyanto, Ruki; Ratnasari, Dian; Santosa, Budi Heru; Anisah, Anisah; Hidayat, Wahyu; Gita Alamanda Sapan, Elenora; Priyadi, Hari; Purwana, Rachmadhi
LIMNOTEK Perairan Darat Tropis di Indonesia Vol. 31 No. 1 (2025)
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/limnotek.2025.8066

Abstract

Groundwater is a critical resource for meeting the increasing demands of urban, agricultural, and industrial sectors. However, overexploitation and contamination pose significant threats to its sustainability. This study aims to assess the groundwater potential zones (GWPZ) within the Semarang-Demak Groundwater Basin, a rapidly urbanizing region in Central Java, Indonesia, where clean water availability faces mounting challenges. A geospatial approach integrating Geographic Information Systems (GIS), Remote Sensing (RS), and the Analytical Hierarchy Process (AHP) was employed to identify and classify GWPZ. Key factors analyzed include geology, lithology, slope, soil type, drainage density, rainfall, geomorphology, and land use/land cover. The results delineate the basin into five classes of groundwater potential zones, ranging from very poor to very good, offering actionable insights into areas optimal for groundwater recharge and extraction. Validation using groundwater table measurements from 71 infiltration wells confirmed a significant correlation between predicted zones and observed water levels. The results showed that zones with very high groundwater potential are concentrated in the central part of the basin, primarily due to favorable conditions such as high rainfall, alluvial formations, and low drainage density. These findings provide actionable insights for stakeholders to implement targeted groundwater management strategies, ensuring sustainable water resource utilization in the face of growing urbanization and environmental pressures.
PENGARUH LITERASI KEUANGAN TERHADAP PERILAKU KEUANGAN PADA PELAKU UMKM DI SUKAMUKTI, CILAWU GARUT Ratnasari, Dian; Feriyanto, O.
JURSIMA Vol 12 No 3 (2025): Volume 12 Nomor 3 2025
Publisher : INSTITUT TEKNOLOGI DAN BISNIS INDOBARU NASIONAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47024/js.v12i3.1104

Abstract

Tujuan dari penelitian ini untuk mengetahui secara parsial pengaruh literasi keuangan (X), terhadap perilaku keuangan (Y) pada pelaku UMKM di Desa Sukamukti Kecamatan Cilawu kabupaten Garut. Dalam penelitian ini digunakan metode kuantitatif dengan teknik pengumpulan data menggunakan kuesioner atau angket. Populasi pada penelitian ini adalah seluruh UMKM di Desa Sukamukti Kecamatan Cilawu kabupaten Garut sebanyak 82 UMKM. Teknik sampling jenuh merupakan teknik penentuan sampel apabila seluruh anggota populasi di gunakan sebagai sampel. Berhubung jumlah UMKM di Desa Sukamukti Kecamatan Cilawu kabupaten Garut 82, maka semua UMKM diambil jadi objek penelitian. Metode analisis yang digunakan dalam penelitian ini adalah metode regresi linier sederhana dengan menggunakan program SPSS versi 27. Hasil dari penelitian ini secara parsial literasi keuangan (X) berpengaruh positif dan signifikan terhadap perilaku keuangan (Y). Hal ini berdasarkan nilai thitung untuk variabel literasi keuangan adalah thitung 7.404 > ttabel 1.664 dengan tingkat signifikan 0.000 < 0.05. Kata Kunci: Literasi Keuangan, Perilaku Keuangan, Pelaku UMKM
Co-Authors Anisah Asda Rauf Bangun Muljo Sukojo, Bangun Muljo Budi Heru Santosa Feriyanto, O. Galeh Septiar Pontang Gita Alamanda Sapan, Elenora Hari Priyadi Purbowati Rachmadhi Purwana Ruki Ardiyanto Teguh Harianto Wahyu Hidayat Wibowo, Agus Yuriko Boekoesoe Yusuf S. Djajadihardja, Yusuf S.