UPN (Universitas Pembangunan Nasional) Veteran Yogyakarta: Portal Journals
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Pertiwi, R.P.C. Pemanfaatan Manipulasi Fotoperiod dalam Produksi Ikan-ikan Budidaya (Update – Studi pada Ikan Cupang): (UPDATE – STUDI PADA IKAN CUPANG)
No full textFotoperiod merupakan tindakan manusia untuk mengatur duraspencahayaan dalam budidaya ikan. Hal ini telah dilakukan pada beberapa ikan laut atau pun ikan air tawar. Efek yang dapat dicapai adalah meningkatkan kelangsungan hidup, meningkatkan pertumbuhan, mempercepat atau menunda laju reproduksi ikan. Sinyal fotoperiod merangsang sistim saraf pusat di otak, selanjutnya mengirimkan sinyal ke organ-organ terkait pada metabolisme tubuh ikan. Hasil penelitian terbaru (update) pada ikan cupang jantan dengan penerapan fotoperiod berbeda. Fotoperiod dengan lama pencahayaan 14 jam terang (14L) dan 10 jam gelap (10D), dibandingkan dengan 10L:14D, dan kontrol (pencahayaan alami), telah dilakukan pada ikan cupang jantan. Ikan cupang untuk penelitian ini sudah memijah pertama dan bersiap menuju pemijahan berikutnya. Untuk itu, dipelihara di bawah pencahayaan 14L:10D, 10L:14D, dan kontrol. Hasil percobaan menunjukkan bahwa ikan jantan dengan pencahyaan 14L:10D mampu mempercepat waktu pemijahan kembali menjadi 30 hari. Normalnya mencapai 2-3 bulan, sebagaimana dicapai pada Kontrol. Pencahayaan 10L:14D tercapai pemijahan kembali pada 42 hari. Perkembangan testis tertinggi juga dihasilkan pencahyaan 14L:10D, dibanding 10L:14D, dan Kontrol. Hasil ini menunjukkan bahwa penerapan manipulasi fotoperiod mampu mempercepat pemijahan kembali ikan cupang jantan. Percepatan pemijahan kembali berarti ikan cupang jantan mampu siap memijah kembali dalam waktu lebih singkat. Hal ini memungkinkan peningkatan produksi ikan cupang dalam budidayanya.
Kata Kunci: Ikan Cupang, testis, fotoperiod, pemijahanFotoperiod merupakan tindakan manusia untuk mengatur durasi pencahayaan dalam budidaya ikan. Hal ini telah dilakukan pada beberapa ikan laut ataupun ikan air tawar. Efek yang dapat dicapai adalah menambah kelangsungan hidup, meningkatkan pertumbuhan, mempercepat atau menunda laju reproduksi ikan. Sinyal fotoperiod merangsang sistim saraf pusat di otak, selanjutnya mengirimkan sinyal ke organ-organ terkait pada metabolisme tubuh ikan. Hasil penelitian terbaru (update) pada ikan cupang jantan dengan penerapan fotoperiod berbeda. Fotoperiod dengan lama pencahayaan 14 jam terang (14L) dan 10 jam gelap (10D), dibandingkan dengan 10L:14D, dan kontrol (pencahayaan alami), telah dilakukan pada ikan cupang jantan. Ikan cupang untuk penelitian ini sudah memijah pertama dan bersiap menuju pemijahan berikutnya. Untuk itu, dipelihara di bawah pencahayaan 14L:10D, 10L:14D, dan kontrol. Hasil percobaan menunjukkan bahwa ikan jantan dengan pencahyaan 14L:10D mampu mempercepat waktu pemijahan kembali menjadi 30 hari. Normalnya mencapai 2-3 bulan, sebagaimana dicapai pada Kontrol. Pencahayaan 10L:14D tercapai pemijahan kembali pada 42 hari. Perkembangan testis tertinggi juga dihasilkan pencahyaan 14L:10D, dibanding 10L:14D, dan Kontrol. Hasil ini menunjukkan bahwa penerapan manipulasi foto[eriod mampu mempercepat pemijahan kembali ikan cupang jantan. Percepatan pemijahan kembali berarti ikan cupang jantan mampu siap memijah kembali dalam waktu lebih singkat. Hal ini memungkinkan peningkatan produksi ikan cupang dalam budidayanya
The BOOMERANG MECHANISM IN HUMAN RIGHTS ADVOCACY: BALOCH LONG MARCH AGAINST CHINA-PAKISTAN ECONOMIC
Full text linkTransnational advocacy networks (TANs) and the “boomerang” pattern of influence can bypass domestic repression and internationalise local human rights struggles, as shown by the 2023–2024 Baloch Long March. Pakistani activists led by the women\u27s organisation Baloch Yakjehti Committee (BYC) marched from Gwadar to Islamabad to demand justice for enforced disappearances and extrajudicial killings in Balochistan, facing censorship, arbitrary arrests, and state violence. When local channels were blocked, movement leaders allied with international NGOs (Amnesty International, Human Rights Watch) and global media to present their plight to the UN and international public. This strategy led to UN expert statements in early 2025 and international media coverage, increasing pressure on Pakistan\u27s government. This study examines how the Long March employed external pressure to highlight human rights violations associated with the China–Pakistan Economic Corridor, utilizing Keck and Sikkink\u27s “boomerang” framework and other norm-based theories. Despite Pakistani authorities\u27 repressive measures (information blackouts, protest bans), the international outcry raised the cost of rights abuses and internationalised the Baloch cause. This paper demonstrates how marginalized activists utilized global media and networks to advocate for domestic rights.
 
Perbandingan Akurasi UAV Multirotor dan Fixed Wing Berbasis Post Processing Kinematic (PPK) untuk Pemetaan Skala Besar
Full text linkAbstrak: Perkembangan teknologi Unmanned Aerial Vehicle (UAV) telah menghadirkan alternatif survei pemetaan yang lebih efisien dibandingkan metode terestrial konvensional. Namun demikian, akurasi hasil pemetaan sangat bergantung pada metode georeferencing, khususnya penggunaan Ground Control Point (GCP) dan pendekatan Post Processing Kinematic (PPK). Penelitian ini bertujuan membandingkan tingkat akurasi UAV tipe Multirotor (DJI Phantom 4 RTK) dan Fixed Wing (VTOL) berbasis PPK, baik dengan maupun tanpa kombinasi GCP, untuk menentukan efektivitasnya dalam pemetaan berskala besar. Lokasi penelitian berada di Kecamatan Badau, Kapuas Hulu, Kalimantan Barat dengan luas ±24 hektar. Data dikumpulkan melalui akuisisi udara dan pengukuran GCP/ICP, kemudian diolah menggunakan perangkat lunak Emlid Studio dan Agisoft Metashape. Hasil uji akurasi menunjukkan model DJI Phantom 4 RTK dengan 3 GCP menghasilkan ketelitian vertikal terbaik (LE90 = 0,104 m), sedangkan model tanpa GCP memiliki ketelitian horizontal tertinggi (CE90 = 0,059 m). Sementara itu, UAV VTOL memberikan akurasi vertikal lebih baik dibanding DJI Phantom 4 RTK tanpa GCP. Analisis visual memperlihatkan perbedaan tajam tekstur dan ketajaman objek akibat variasi tinggi terbang dan spesifikasi kamera. Kesimpulannya, kombinasi metode PPK dengan tambahan minimal GCP mampu meningkatkan akurasi vertikal secara signifikan, sedangkan UAV Multirotor lebih unggul pada akurasi horizontal
Analysis of Factors Affecting Sweet Bread Production
Full text linkThis study aims to (1) analyze the influence of raw materials, supporting materials, and labor on the production of sweet bread at Kedai Djoen Malioboro, (2) analyze the condition of the business scale on the production of sweet bread at Kedai Djoen Malioboro. The type of research used is quantitative descriptive with a case study approach. Data analysis techniques include classical assumption tests, multiple linear regression analysis, and return to scale analysis. The results of the study indicate that the factors that influence the production of sweet bread at Kedai Djoen include raw materials (wheat flour), supporting materials (chicken eggs, powdered milk, granulated sugar, salt, arrowroot flour, and chocolate) and labor. Meanwhile, supporting materials such as butter, roombutter, wet yeast, and bread improver do not affect production. The return to scale value is 0.892 <1, which means that the condition of sweet bread production at Kedai Djoen is on a decreasing return to scale business scale. The proportion of additional production factors for raw materials, supporting materials and labor is greater than the proportion of additional production of sweet bread
Analisis Faktor-Faktor yang Memengaruhi Keputusan Pembelian Kopi Rebus Robusta Merapi
Full text linkPenelitian ini bertujuan untuk (1) mendeskripsikan persepsi konsumen, pengetahuan produk, kelompok acuan, lingkungan dan situasi konsumen, serta keputusan pembelian terhadap kopi rebus robusta Merapi di Warung Kopi Merapi, (2) menganalisis pengaruh persepsi konsumen, pengetahuan produk, kelompok acuan, serta lingkungan dan situasi konsumen terhadap keputusan pembelian kopi rebus robusta Merapi di Warung Kopi Merapi. Penelitian ini menggunakan metode deskriptif kuantitatif dengan pendekatan studi kasus. Sampel ditentukan melalui accidental sampling sebanyak 60 responden, dengan analisis deskriptif dan regresi linier berganda sebagai teknik analisis data. Hasil penelitian menyatakan bahwa (1) Konsumen menilai positif kualitas rasa dan harga kopi rebus robusta Merapi, memiliki pengetahuan baik tentang produk, serta dipengaruhi kelompok acuan melalui rekomendasi dan pengalaman bersama. Lingkungan dan situasi, seperti suasana dan kenyamanan warung, juga berperan, sementara keputusan pembelian didorong oleh keyakinan, pengalaman, dan kepuasan terhadap kopi rebus robusta Merapi, (2) Persepsi konsumen, pengetahuan produk, kelompok acuan, serta lingkungan dan situasi konsumen berpengaruh terhadap keputusan pembelian kopi rebus robusta Merapi di Warung Kopi Merapi
The Effect of Audit Opinion, Size of Public Accounting Firms, Profitability, And Inflation on Stock Prices In Healthcare Sector Companies Listed (Indonesia Stock Exchange)
Full text linkThis study aims to determine the effect of audit quality, profitability, and inflation on stock prices. This research uses secondary data from the audited financial statements of healthcare sector companies listed on the Indonesia Stock Exchange (IDX) for 2020-2023. The population used in this study consists of 34 healthcare companies listed on the IDX during the years 2020-2023. There were 18 sample companies obtained by purposive sampling. The analysis method used is multiple regression analysis with IBM SPSS Statistics 25 as the tool to process the data and test the variables of audit quality, which is proxied by audit opinion and the size of the public accounting firm, profitability measured by earnings per share, and inflation on stock prices. The results of the study prove that partially, only the profitability variable has a significant positive effect on stock prices. Meanwhile, audit quality, proxied by audit opinion and the size of the public accounting firm, as well as inflation, do not have a significant effect on stock prices, both partially and simultaneously
Optimization of stock price prediction of PT Aneka Tambang Tbk (ANTM) using Long Short-Term Memory
Full text linkPurpose: Develop a machine learning model to predict stock market activity by finding the Root Mean Squared Error (RMSE) value.Design/methodology/approach: LSTM (Long Short-Term Memory) is one of the machine learning techniques that can be used to anticipate traffic in realtime. Using this method can be used to analyze stock market activity that has time series data.Findings/result: This research obtained a Root Mean Squared Error (RMSE) value of 43.32.Originality/value/state of the art: By using the same machine learning method as the previous research, namely LSTM. The research provides more efficient results
Achieving Net Zero Emissions Target: Development of Carbon Dioxide Handling Technologies, Its Challenges and Barriers
No full textAbatement of carbon emission to net zero level in 2050 is a serious work for Indonesia in all sectors. In this article, review on the current status of CC technologies was conducted including commercial scale and R&D works. The technologies performance was also inserted in order to provide the information that valuable and useful in technological selection. However, the challenges and barriers for Indonesia in their efforts to reduce carbon emissions are not only about technological aspects; the issues of policy, socio culture, law and human resources also play an important role. In order to ensure the project going well, regulations and policies are needed both at the national and provincial levels, besides the massive socialization efforts from various stakeholders
Analisis Potensi Tanah Longsor Menggunakan Metode Geolistrik di Dusun Plalar Kecamatan Banyubiru Kabupaten Semarang
No full textLandslide in 2019 was the worst incident in Sodong Hamlet and Plalar Hamlet in Kemambang Village. To date, no scientific research has been conducted to assess the landslide potential in this area. Accordingly, this research aims to model subsurface lithological structure in landslide-prone zones -specifically in Plalar Hamlet- using the geoelectrical resistivity geophysical method. Data acquisition was carried out using the Electrical Resistivity Tomography (ERT) technique with a dipole-dipole configuration across six profiles, each extending 160 meters in length. Complementary Vertical Electrical Sounding (VES) surveys employing the Schlumberger array were also conducted at two locations. Interpretation of the data reveals the presence of a slip surface at a depth of approximately 15 meters, with an average slope inclination of 31o. Analysis of rainfall records indicates that landslide occurrences in the region are primarily triggered by high precipitation frequency during the December to February period. The potential runout distance of landslide material is estimate to be around 320 meters, with a projected flow velocity ranging between 1.5 and 2.0 meters per second. Furthermore, the maximum volume of displaceable weathered soil is estimated at approximately 200,000 m3.
Keywords: geoelectrical; landslide; litholog