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Finding the Corridor Potential between Protected Areas in a Fragmented Landscape, Gunungkidul Regency, Indonesia
No full textFragmentation impacts disconnecting protected areas in Gunungkidul Regency, namely Bunder Forest Park (BFP) and the Paliyan Wildlife Reserve (PWR). This also decreases the carrying capacity in PWR, degrading the Long-Tailed Macaque (LTM) habitat. Therefore, this research aims to analyze the landscape structure between Protected areas, the habitat suitability of LTM in Gunungkidul Regency, and determine connectivity potential as an environmental management strategy. applied for this research to investigates the structure and fragmentation using Fragstat 4.2 and ArcGIS 10.8 software. Meanwhile, scoring and weighting methods analyze the LTM habitat, while Least Cost Patch Analysis (LCPA) supported by ArcGIS 10.8 determine the corridor. The results showed that the research land cover changed from 1999-2021. Agriculture, scrubs, and settlements are the dominant land cover suspected to cause forest fragmentation. Based on the habitat suitability analysis using parameters such as land cover, vegetation density, slope, altitude, distance from the river, and sources of threats, most of the research area is intermediate habitat suitability class. These findings can be integrated to determine connectivity between protected areas as one of the environment management strategies. Good forest cover can be used to designate a corridor that has the greatest potential to be developed between BFP and PWR and should be maintained as a wildlife crossing. © 2023 Madina Dwi Panuntun et al., published by Sciendo
Multitemporal water quality analysis of an epikarst spring for agricultural irrigation in the Gunungsewu Karst Area, Indonesia
No full textGuntur Spring provides clean domestic and agricultural irrigation water and is the only water source in Girijati Village (Gunungkidul Regency) and Sorotopo Village (Bantul Regency), Yogyakarta Indonesia. The research was designed to analyze the multitemporal suitability of an epikarst spring water in the tropics for irrigation, with Guntur Spring as an example. It employed Na analysis, Sodium Adsorption Ratio (SAR) calculation, and hydrogeochemical data plotting on the USSL and Wilcox diagrams. The observed elements were Ca2+, Na+, Mg2+, K+, and electrical conductivity. Based on the Na and SAR values, all samples of the Guntur Spring were excellent (S1). The USSL plot classified them as moderate to good (S2-C1), and the Wilcox diagram indicated excellent to good attributes. Guntur Spring has higher water suitability parameter values for irrigation (Na and SAR) than other springs in the Gunungsewu Karst Area that receive allogenic recharges. However, such a difference does not necessarily place these springs in different classes. Likewise, although extreme events like the tropical cyclone Savannah diminish the water quality, it does not lower the water suitability class for this purpose. © 2023 Author(s)
Landsat 8 OLI imagery based mapping of agricultural land change in 2014 to 2020 in Karawang Regency
No full textLand use change is a phenomenon that needs special attention, especially concerning the planning and development of a region. Agricultural land is the most vulnerable form of land use to change. Agricultural land was transformed or converted into other forms of land use for the industrial zone. Changes in agricultural land occur in various regions even in areas known for their rice productions, namely Karawang Regency. Information about changes or conversion of agricultural land, especially information with spatial references, is very important and needs to be kept up to date. This information is very useful as input in regional development planning. This study aims to map and analyze changes in agricultural lands in Karawang Regency. The study period was between 2014 and 2020. The method used was a combination of remote sensing image interpretation and spatial analysis. Interpretation of imagery was done using multispectral classification methods called maximum likelihood. The results showed that during the 2014-2020 period, agricultural land in Karawang Regency decreased by 27,659.57 hectares. © 2023 Author(s)
Verifikasi Kalibrasi Reaktivitas Batang Kendali Reaktor Kartini Dengan Simulasi Monte Carlo
No full textDilaksanakan kegiatan Kerja Praktik (KP) di Direktorat Pengelolaan Fasilitas Ketenaganukliran (DPFK) yang terletak di Yogyakarta mengenai Verifikasi Kalibrasi Reaktivitas Batang Kendali Reaktor Kartini Dengan Simulasi Monte Carlo. Kegiatan KP dilaksanakan pada tanggal 19 Desember 2022 hingga 19 Januari 2023. Tugas khusus kegiatan KP adalah untuk melakukan simulasi Monte Carlo untuk membandingkan hasil kalibrasi batang kendali Reaktor Kartini dari hasil pengukuran dengan hasil simulasi. Digunakan aplikasi MCNPX dan TRIGAMCNP untuk menjalankan simulasi dan memodelkan reaktor. Kalibrasi reaktivitas batang kendali Reaktor Kartini dilakukan pada tanggal 9 Januari 2023 dengan hasil karakteristik teras yang meliputi nilai integral masing-masing batang kendali pengatur, kompensasi, dan pengaman secara berurutan, 1,7159 ; 2,9814 . Nilai reaktivitas lebih teras bernilai 1,4696 ; 1,4584 yang memenuhi kriteria keselamatan operasi reaktor. Berdasarkan hasil tersebut, perlu dilakukan penyusunan kode simulasi yang lebih baik dengan data burnup terkini sehingga didapatkan hasil galat yang lebih kecil antar hasil pengukuran dengan hasil simulasi
Analisis Keberhasilan Pengolahan Limbah Radioaktif Cair Menggunakan Metode Evaporasi
No full textInstalasi Pengelolaan Limbah Radioaktif (IPLR) mempunyai tugas
melaksanakan perumusan dan pengendalian kebijakan teknis, pelaksanaan, dan
pembinaan dan bimbingan di bidang pengembangan teknologi dan pengelolaan
limbah. Ada banyak jenis limbah yang dikelola oleh IPLR dan salah satunya adalah
limbah radioaktif cair (LRC). Limbah radioaktif cair bisa diolah dengan berbagai
macam cara berdasarkan karakteristik limbahnya. Pada laporan ini dibahas lebih
lanjut mengenai pengolahan limbah radioaktif cair menggunakan metode evaporasi
dan analisis keberhasilan pengolahan LRC dengan metode evaporasi di IPLR.
Metode evaporasi berfungsi untuk memproses limbah cair melalui proses
penguapan. Rangkaian dari proses evaporasi dimulai dari menyalakan boiler,
mengumpankan limbah radioaktif ke tangki evaporasi, lalu mengumpankan steam
ke sistem evaporasi. Proses tersebut menghasilkan konsentrat dan uap. Uap limbah
dicuci dengan air demineral kemudian diembunkan dan masuk ke cooler. Produk
akhirnya adalah destilat yang dimasukkan ke tangki destilat. Seluruh proses diawasi
melalui panel kontrol evaporasi. Setelah proses selesai kemudian dilakukan
counting sampel konsentrat, destilat serta air kolam pemantauan buangan terpadu
(PBT) dengan menggunakan sistem detektor HPGe dan MCA, lalu dianalisis
menggunakan software Gamma Vision. Hasilnya adalah destilat sudah bersih dari
radionuklida karena semuanya sudah terakumulasi pada konsentrat. Air kolam PBT
juga sudah bisa untuk dilakukan klierens. Pengolahan limbah radioaktif cair dengan
metode evaporasi di IPLR berjalan dengan lancar dan aman
THE EFFECT OF BORON-10 CONCENTRATION AND IRRADIATION DIRECTION ON DOSE AND IRRADIATION TIME OF LEFT BREAST CANCER BORON NEUTRON CAPTURE THERAPY BASED ON PHITS
No full textIn 2020, 11.7% of all new cancer cases in Indonesia were breast cancer cases. Currently, photon radiotherapy causes unavoidable radiation exposure to healthy tissues. An alternative radiotherapy called Boron Neutron Capture Therapy (BNCT) uses boron-10 as a neutron-capturing agent to induce nuclear reactions that selectively destroy cancer cells. BNCT offers an aggressive and potentially curative treatment option for early-stage breast cancer. Dose analysis and irradiation timing are crucial to ensure the success and safety of BNCT.
The Particle and Heavy Ion Transport code System was chosen for the BNCT dose analysis due to the complex and diverse behavior of the neutrons. This tool has low memory consumption and computation time for phantom modeling. In this study, the concentration of boron-10 in the tumor was varied by 15, 30, 45, 60, and 75 ppm with front and side irradiation directions. Optimization was carried out on the Beam Shaping Assembly prior to irradiation to improve the quality of the neutron beam for BNCT.
The results of the BNCT simulation of left breast cancer using PHITS stated that boron-10 concentrations of 15, 30, 45, 60, and 75 ppm in the front and side irradiation directions resulted in a safe dose for organs at risk and resulted in a therapeutic time of less than 20 minutes which complies with IAEA criteria
Pengaruh Konsentrasi Boron dan Arah Penyinaran Terhadap Dosis dan Waktu Terapi Kanker Nasofaring dengan Boron Neutron Capture Therapy Menggunakan Program PHITS
No full textBoron Neutron Capture Therapy (BNCT) merupakan modalitas terapi kanker yang menggunakan boron-10 yang diinjeksikan dalam pasien dan selanjutnya diiradiasi dengan neutron. Pada terapi BNCT, diperlukan waktu iradiasi yang efektif agar dosis yang diterima Organ at Risk (OAR) berada dibawah dosis toleransi. Penelitian dilakukan menggunakan pendekatan probabilistik secara simulasi dengan Metode Monte Carlo. Program yang digunakan yaitu Particle and Heavy Ion Transport code System (PHITS) 3.30 yang dapat mensimulasikan berbagai macam partikel secara akurat dibanding program Monte Carlo lain. Pada penelitian ini dimodelkan fantom kepala dan leher dari Oak Ridge National Laboratory (ORNL) serta sumber neutron Beam Shaping Assembly (BSA). Simulasi dilakukan dengan memvariasikan arah penyinaran pada arah Posterior-Anterior dan Left-Lateral dengan konsentrasi boron sebesar 100, 110, 120, 130, dan 140 μg/g. Hasil yang didapatkan dari penelitian ini, menunjukkan waktu iradiasi yang efektif untuk kanker nasofaring pada terapi BNCT sebesar 47,17 menit pada konsentrasi boron yang diinjeksikan ke pasien sebesar 140 μg/g dan arah penyinaran left-lateral. Berdasarkan waktu iradiasi tersebut, organ sehat selama terapi masih berada di bawah dosis toleransi
Regulating Court Jurisdiction to Protect Weaker Parties: An Overview of the Indonesian Civil Justice System
No full textIt is necessary to facilitate easy access to courts to protect weaker parties. This can be achieved by regulating the personal jurisdiction of the court so that weaker parties can easily access it. In the Indonesian civil justice system, some regulations have been implemented to protect weaker parties through the jurisdiction of courts. This article elaborates on these regulations and their obstacles in protecting the access of consumers, workers, women and children, and foreigners to Indonesian courts. A statutory approach with reference to the general principles of the court’s personal jurisdiction and the principles of access to justice for weaker parties This article finds that some regulations related to the court’s personal jurisdiction in Indonesia provide protection to weaker parties by allowing them to submit their claim to the court where they reside against the counterparty. However, a lack of consistency may hinder its implementation
A proposal for disaster risk management in the local level: lesson learned from earthquake prone area in Sengon village, Central Java, Indonesia
No full textSengon Village is one of the regions affected by the Yogyakarta earthquake in 2006. This paper aims to propose a model for disaster risk management in the local level, i.e., in a village. This study uses a participatory method through Focused Group Discussion to map vulnerabilities, evacuation routes, and the location of evacuation shelters. A strength-weakness-opportunity-threat analysis is carried out to assess community preparedness, which is then used as one of the bases for preparing standard operating procedures (SOP) for earthquake preparedness. The results showed that the community was able to design and determine evacuation routes, potential evacuation sites, and to identify the elements at risk as well as the vulnerability to earthquakes. The earthquake SOP was generated from the FGDs with stakeholders at the village and district levels. Earthquake SOP have become a village regulation and are planned to be legalized at the district level. As a follow-up to this SOP, routine simulations are needed to test the success rate of earthquake risk reduction program. The disaster risk management for earthquake resulted through this approach can strengthen Sengon Village to become a major disaster resilient village (Desa Tangguh Bencana/DESTANA Utama), as a part of national disaster risk reduction program. © 2023 Elsevier Inc. All rights reserved
Students are Happier in Madrasah: The Results of Bayesian Analysis on Indonesian National Survey Data
No full textIslamic education is an important part of the Indonesian education system. This is not only because Indonesia is the biggest Muslim country in the world, but also because Islamic education has a social, cultural, and political role in Indonesian society. Nevertheless, madrasahs in Indonesia face several challenges entrenched from financial constraints. This leads to adverse consequences such as restrictions in the provision of infrastructure, inadequate quality of teachers, and low academic achievement in the national exam. Furthermore, students in madrasahs have more burdens than those in regular schools; for instance, students in madrasahs have more subjects to study, longer school hours, and must adhere to stricter rules and conduct. The challenges faced by madrasah raise concerns regarding its effects on students� subjective well-being. Therefore, the present study aims to investigate whether there is a difference in students� happiness between those who attend madrasahs and the regular schools. The data collected were based on the results of face-to-face interviews with 1,299 secondary education students in Indonesia. The results of the Bayesian ANCOVA analysis showed that the best-fitting model for predicting students� happiness contained type of school and wealth level as predictors. The results also showed that the happiness level of madrasah students was significantly higher than their counterparts in regular high school. The finding is noteworthy because students� happiness in madrasah is higher than in the regular school, despite the lower level of wealth. The results further discussed the literature on religiosity and happiness in the context of adolescent education. © 2023, Institut Agama Islam Ma'arif NU (IAIMNU) Metro Lampung. All rights reserved