The investigation of the utilization of enriched 208Pb as a coolant to enhance the performance of a long-life fast reactor with a Modified CANDLE (Constant Axial shape of Neutron flux, nuclide ...densities, and power shape During Life of Energy production) burnup scheme has performed. The analyzes were performed on a reactor with thermal power of 800 MegaWatt Thermal (MWTh) with a refueling process every 15 years. Uranium Nitride (enriched 15N), 208Pb, and High-Cr martensitic steel HT-9 were employed as fuel, coolant, and cladding materials, respectively. One of the Pb-nat isotopes, 208Pb, has the smallest neutron capture cross-section (0.23 mb) among other liquid metal coolants. Furthermore, the neutron-producing cross-section (n, 2n) of 208Pb is larger than sodium (Na). On the other hand, the inelastic scattering energy threshold of 208Pb is the highest among Na, natPb, and Bi. The small inelastic scattering cross-section of 208Pb can harden the neutron energy spectrum. Therefore, 208Pb is a better neutron multiplier than any other liquid metal coolant. The excess neutrons cause more production than consumption of 239Pu. Hence, it can reduce the initial fuel loading of the reactor. The selective photoreaction process was developing to obtain enriched 208Pb. The neutronic was calculated using SRAC and JENDL 4.0 as a nuclear data library. We obtained that the modified CANDLE reactor with enriched 208Pb as coolant and reflector has the highest k-eff among all reactors. Meanwhile, the natPb cooled reactor has the lowest k-eff. Thus, the utilization of the enriched 208Pb as the coolant can reduce reactor initial fuel loading. Moreover, the enriched 208Pb-cooled reactor has the smallest power peaking factor among all reactors. Therefore, the enriched 208Pb can enhance the performance of a long-life Modified CANDLE fast reactor.
Perkembangan teknologi digital telah berdampak positif terhadap cara baru untuk mengevaluasi pembelajaran dan memberikan umpan balik kepada siswa melalui e-assessment. Namun, penyusunan e-assessment ...yang efisien di level sekolah menenah atas membutuhkan pelatihan. Dengan demikian, pengabdian ini bertujuan untuk memberikan pelatihan penyusunan soal interaktif menggunakan platform e-ujian bagi guru-guru kimia di Jakarta Timur, DKI Jakarta. Peserta adalah 61 guru kimia dari 10 SMA di Jakarta Timur. Pelatihan diselenggarakan pada tanggal 8 September 2022 secara hybrid. Keberhasilan pelatihan dievaluasi menggunakan survey dan dibagikan diakhir kegiatan. Hasilnya menunjukkan bahwa ada peningkatan keterampilan guru dalam mengonstruksi soal-soal dengan bantuan teknologi. Kegiatan ini telah memberikan alternatif solusi bagi guru kimia untuk memudahkan mereka dalam melakukan penilaian. Mitra mengharapkan adanya keberlanjutan program ini.
This study aims to evaluate the performance of the Alsintan Service Business (UPJA) in the Beginner class, Developing class, and Professional class. The research was conducted using survey ...techniques and analyzed descriptively and qualitatively using a balanced scorecard (BSC) approach. UPJA samples were determined purposively, namely UPJA that represents each class: UPJA Sumber Makmur as UPJA Professional class, UPJA OJHA as UPJA Beginner class in Sleman Regency, and UPJA Tirtosari as UPJA Developing class in Gunungkidul Regency. Respondents were UPJA managers and employees. The results showed that, based on the financial perspective, the performance of the UPJA Beginner class and UPJA Developing class was fairly good, while the UPJA Professional class was good. Based on the customer's perspective, UPJA's performance in all classes falls into the good category. Based on the perspective of internal business processes, the performance of the three UPJA classes has innovated the development of service business services and has carried out service business operations in the medium category. Based on the perspective of learning and growth, the performance of all UPJA classes already provides satisfactory facilities for their employees. However, the UPJA Beginner class and Developing class need to improve the ability of its operators through training. Keywords: agricultural machine tools service business, balanced scorecard, performance analysis, UPJA
Abstract The Molten Salt Reactor (MSR) is a type of reactor in which coolant and fuel are blended with liquid salts. Liquid fuel enhances heat transfer and temperature control, establishing the MSR ...as one of the Generation IV reactor types. This study aims to analyze the impact of temperature variations on MSR reactor criticality and evaluate the effect of different nuclear data libraries, namely JENDL 3.2, JENDL 3.3, and JENDL 4.0, in neutron analysis. The observed temperature variations are 600 K, 700 K, 833 K, 903 K, and 1000 K. The analysis spans low to operational temperatures to comprehend reactor performance under differing thermal conditions. The study is conducted on a 300 MWTh MSR design, utilizing SRAC2006 with PIJ and CITATION modules for calculations. The results reveal the impact of temperature variations and nuclear data library disparities on reactor criticality. The outcomes demonstrate that higher temperatures correspond to lower values of the effective multiplication factor. At lower temperatures, neutrons experience greater moderation compared to higher temperatures. As a result, a higher number of thermal neutrons influences an increased probability of fission reactions within the reactor. Different nuclear data libraries also yield varied criticality values due to differing cross-sectional areas and quantities of data within each JENDL library. JENDL 4.0 generates the highest criticality value, attributed to elevated cross-sectional regions of each respective nuclear data entry and a greater quantity of nuclear data entries than JENDL 3.2 and JENDL 3.3.
Skizofrenia adalah salah satu gangguan mental yang berat. Perjalanan penyakitnya kronis dan sering kambuh. Tidak lebih dari 10% ODS berfungsi baik hanya dengan pengobatan anti psikotik. Sembilan ...puluh persen sisanya tetap membutuhkan pendekatan dinamis termasuk juga terapi keluarga. Pendekatan dinamis berarti diperlukan kerjasama berbagai pihak untuk membantu pemulihan. Keluarga merupakan faktor penting, baik dalam etiologi maupun pemulihan ODS. Penelitian ini merupakan intervensi single case study dengan Bowen Family Therapy terhadap keluarga yang mengalami skizofrenia. Data diperoleh melalui wawancara terhadap ayah, ibu, Index Person, dan kakak perempuannya. Hasil penelitian menggambarkan bahwa kemampuan melakukan diferensiasi sangat dipengaruhi oleh intensitas relasi emosi dari anggota keluarga lain. Diferensiasi diri yang dari buruk ayah dan ibu (generasi kedua), menyebabkan munculnya gangguan skizofrenia pada salah satu anak perempuannya (generasi ketiga) yang terjebak dalam double bind-messages.
This paper presents a comprehensive bibliometric review of the development of artificial intelligence (AI) in journalism based on the analysis of 331 articles indexed in the Scopus database between ...2019 and 2023. This research combines bibliometric approaches and quantitative content analysis to provide an in-depth conceptual and structural overview of the field. In addition to descriptive measures, co-citation and co-word analyses are also presented to reveal patterns and trends in AI- and journalism-related research. The results show a significant increase in the number of articles published each year, with the largest contributions coming from the United States, Spain, and the United Kingdom, serving as the most productive countries. Terms such as “fake news”, “algorithms”, and “automated journalism” frequently appear in the reviewed articles, reflecting the main topics of concern in this field. Furthermore, ethical aspects of journalism were highlighted in every discussion, indicating a new paradigm that needs to be considered for the future development of journalism studies and professionalism.
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