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Cross-Covariance Weight of GSTAR-SUR Model for Rainfall Forecasting in Agricultural Areas Sulistyono, Agus Dwi; Hartawati, Hartawati; Suryawardhani, Ni Wayan; Iriany, Atiek; Iriany, Aniek
CAUCHY Vol 6, No 2 (2020): CAUCHY: Jurnal Matematika Murni dan Aplikasi
Publisher : Mathematics Department, Maulana Malik Ibrahim State Islamic University of Malang

The use of location weights on the formation of the spatio-temporalÂ model contributes to the accuracy of the model formed. The location weights that are often used include uniform location weight, inverse distance, and cross-correlation normalization. The weight of the location considers the proximity between locations. For data that has a high level of variability, the use of the location weights mentioned above is less relevant. This research was conducted with the aim of obtaining a weighting method that is more suitable for data with high variability. This research was conducted using secondary data derived from 10 daily rainfall data obtained from BMKG Karangploso. The data period used was January 2008 to December 2018. The points of the rain posts studied included the rain post of the Blimbing, Karangploso, Singosari, Dau, and Wagir regions. Based on the results of the research forecasting model obtained is the GSTAR ((1), 1,2,3,12,36) -SUR model. The cross-covariance model produces a better level of accuracy in terms of lower RMSE values and higher R2 values, especially for Karangploso, Dau, and Wagir areas.

Pelatihan Pembuatan Insektisida Hayati Pada Kelompok Tani Apel Di Batu Jawa Timur Indratmi, Dian; Hartawati, Hartawati; Wulandari, V. Safitri; Rachmawan, Muhammad Danang
JAST : Jurnal Aplikasi Sains dan Teknologi Vol 6, No 1 (2022): EDISI JUNI 2022
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/jast.v6i1.3176

Community service activities were carried out in the Batu area with apple farmer group partners in Giripurno Village, Bumiaji District. Apple farmer groups experienced a decline in apple production which was getting worse due to the widespread attack of apple pests and the challenge of conventionally controlling synthetic chemical pesticides. The activity aims to improve the household welfare of apple farmers and apple production through training on applying appropriate technology for biological insecticides as an alternative to controlling apple pests. The activities are carried out using training methods, counseling, consultation, demonstration plots, and assistance in manufacturing techniques, mass production, and application of biological insecticides. The activity results showed an income and apple production increase by 75%, reduced pest attacks, and healthier plant growth. Increased motivation of apple farmers from low to high.ABSTRAKKegiatan pengabdian pada masyarakat dilaksanakan di daerah Batu dengan mitra kelompok tani apel Desa Giripurno, Kecamatan Bumiaji. Kelompok tani apel mengalami penurunan produksi apel yang semakin parah akibat maraknya serangan hama apel dan sulit dikendalikan dengan cara konvensional menggunakan pestisida kimia sintetik. Kegiatan bertujuan meningkatkan kesejahteraan rumah tangga petani apel dan produksi apel melalui pelatihan penerapan teknologi tepat guna insektisida hayati sebagai alternatif pengendalian hama apel. Kegiatan dilaksanakan dengan metode pelatihan, penyuluhan, konsultasi, demplot, dan pendampingan dalam hal teknik pembuatan, produksi massal, dan aplikasi insektisida hayati di lapang. Hasil kegiatan menunjukkan bahwa terjadi peningkatan pendapatan dan produksi apel sebesar 75%; penurunan serangan hama, serta pertumbuhan tanaman yang lebih sehat. Meningkatnya motivasi petani apel yang semula rendah menjadi tinggi.

The impact of macroeconomic factors and internal company variables on the profit of textile and garment sector companies listed on the indonesian stock exchange Winarto, Jacinta; Susan, Marcellia; Hartawati, Hartawati
JPPI (Jurnal Penelitian Pendidikan Indonesia) Vol 10, No 4 (2024): JPPI (Jurnal Penelitian Pendidikan Indonesia)
Publisher : Indonesian Institute for Counseling, Education and Theraphy (IICET)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29210/020244876

The COVID-19 pandemic has profoundly influenced various sectors, including monetary, social, economic, and humanitarian aspects. Economically, one prominent consequence was the turmoil in global financial markets at the start of 2020, which prompted a shift in global asset allocations and caused currency depreciation in emerging markets such as Indonesia. The textile industry was also impacted due to disruptions in the supply chain for raw materials, leading to higher product costs and, consequently, inflation. Additionally, the implementation of work-from-home policies during this period led to reduced exports and domestic sales, resulting in liquidity challenges and difficulties in debt repayment within the textile sector. These circumstances suggest that exchange rates, inflation, debt, and liquidity were likely contributing factors to the decline in profitability. Profitability need to be considered as they can impact the sustainability of the company. This study aims to examine and evaluate the influence of inflation, exchange rates, debt, and liquidity on corporate profitability. The research focused on textile companies listed on the Indonesia Stock Exchange during 2021–2022, with samples chosen through purposive sampling method. The purposive sample is conducted based on companies that publish complete financial statements during the study period and are not outliers. The selected sample consists of 14 companies. Panel data regression analysis was employed to process the data. Panel data regression analysis is chosen to identify the relationship between macroeconomic factors, internal company variables, and company profitability. The results revealed that inflation, exchange rates, and liquidity had no significant effect on company profits, while debt had a negative impact. The coefficient for each variable's effect on profits are as follows: exchange rate is 0.00001, inflation is -1.0285, debt is -0.0996, and liquidity is -0.0001. Based on these findings, it is suggested that companies improve debt management by negotiating payment terms with suppliers to minimize reliance on bank credit and optimize profitability.

The Impact of Social Media on Political Engagement Among Urban and Rural Youth Noviyantho, Rino; Dasmawati, Andi; Hartawati, Hartawati
Journal Social Civilecial Vol. 2 No. 3 (2024): Journal Social Civilecial
Publisher : Journal Social Civilecial

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71435/610847

The present quantitative study examines how social media affects youth political engagement between urban-based and rural-based participants. Data acquisition occurred through surveys directed at 500 youth participants ranging from 18 to 24 years old who resided in urban as well as rural areas. Urban young participants demonstrated higher levels of political participation than young people in rural areas. The study discovered through its results that social media usage duration enhances political participation among young people. The available social media tools which urban fixated youths used for political discussions included Facebook and Instagram but rural youths expressed limited interaction because these platforms lack accessibility. This study addresses existing literature gaps about geographic variations of youth political activism to demonstrate why rural youth need higher digital literacy and their political activity levels increased. The conclusions offer different approaches that enhance political activism through increased use of social media recommendations in both city and country areas. The findings from this study will be beneficial for those in education and policymaking who wish to improve youth political participation via social media.

The impact of macroeconomic factors and internal company variables on the profit of textile and garment sector companies listed on the indonesian stock exchange Winarto, Jacinta; Susan, Marcellia; Hartawati, Hartawati
JPPI (Jurnal Penelitian Pendidikan Indonesia) Vol. 10 No. 4 (2024): JPPI (Jurnal Penelitian Pendidikan Indonesia)
Publisher : Indonesian Institute for Counseling, Education and Theraphy (IICET)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29210/020244876

The COVID-19 pandemic has profoundly influenced various sectors, including monetary, social, economic, and humanitarian aspects. Economically, one prominent consequence was the turmoil in global financial markets at the start of 2020, which prompted a shift in global asset allocations and caused currency depreciation in emerging markets such as Indonesia. The textile industry was also impacted due to disruptions in the supply chain for raw materials, leading to higher product costs and, consequently, inflation. Additionally, the implementation of work-from-home policies during this period led to reduced exports and domestic sales, resulting in liquidity challenges and difficulties in debt repayment within the textile sector. These circumstances suggest that exchange rates, inflation, debt, and liquidity were likely contributing factors to the decline in profitability. Profitability need to be considered as they can impact the sustainability of the company. This study aims to examine and evaluate the influence of inflation, exchange rates, debt, and liquidity on corporate profitability. The research focused on textile companies listed on the Indonesia Stock Exchange during 2021–2022, with samples chosen through purposive sampling method. The purposive sample is conducted based on companies that publish complete financial statements during the study period and are not outliers. The selected sample consists of 14 companies. Panel data regression analysis was employed to process the data. Panel data regression analysis is chosen to identify the relationship between macroeconomic factors, internal company variables, and company profitability. The results revealed that inflation, exchange rates, and liquidity had no significant effect on company profits, while debt had a negative impact. The coefficient for each variable's effect on profits are as follows: exchange rate is 0.00001, inflation is -1.0285, debt is -0.0996, and liquidity is -0.0001. Based on these findings, it is suggested that companies improve debt management by negotiating payment terms with suppliers to minimize reliance on bank credit and optimize profitability.

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