Judul: Kohesi sosial dan aksi kolektif komunitas miskin perkotaan selama pandemi COVID-19
Abstrak: Salah satu elemen kunci keberhasilan dalam menghadapi pandemi COVID-19 di Indonesia adalah dengan membangun kerjasama. Kerjasama antara anggota komunitas adalah bentuk dari adanya kohesi sosial. Resiliensi komunitas dihasilkan dari kohesi sosial yang mendorong aksi bersama antar warga untuk mengurangi dampak bencana. Penelitian ini bertujuan menganalisis hubungan kohesi sosial dan aksi kolektif pada komunitas miskin perkotaan selama pandemi COVID-19 dengan menggunakan pendekatan kuantitatif melalui kuesioner dan didukung data kualitatif menggunakan wawancara mendalam. Lokasi penelitian ini adalah sebuah RW di Kecamatan Bogor Barat, Kota Bogor yang melibatkan 60 responden melalui metode proportional simple random sampling. Hasil penelitian menunjukkan bahwa walaupun komunitas miskin memiliki kohesi sosial yang sedang, namun mereka mampu memiliki aksi kolektif yang tinggi selama pandemi COVID-19, meskipun lebih rendah dibandingkan dengan aksi kolektif sebelum pandemi. Kohesi sosial dan aksi kolektif komunitas miskin perkotaan memiliki hubungan yang lemah. Kepemimpinan merupakan salah satu faktor yang berperan dalam tingginya aksi kolektif komunitas miskin perkotaan selama pandemi COVID-19., One of the key elements of success in dealing with the COVID-19 pandemic in Indonesia is to build cooperation. Cooperation between community members is a form of social cohesion. Community resilience results from social cohesion that encourages joint action among residents to reduce the impact of disasters. This study aims to analyze the relationship of social cohesion and collective action in urban poor communities during the COVID-19 pandemic using a quantitative approach through questionnaires and supported by qualitative data using in-depth interviews. The location of this research is an RW in West Bogor District, Bogor City which involves 60 respondents through the proportional simple random sampling method. The results show that although poor communities have moderate social cohesion, they are able to have high collective action during the COVID-19 pandemic, although lower than collective action before the pandemic. Social cohesion and collective action of urban poor communities have a weak relationship. Leadership is one of the factors that play a role in the high collective action of the urban poor community during the COVID-19 pandemic.
Keyword: collective action, social cohesion, COVID-19 pandemic

Judul: Resiliensi Komunitas Miskin di Pedesaan Menghadapi Pandemi Covid-19
Abstrak: Pandemi Covid-19 yang terjadi sejak awal tahun 2020 sampai saat ini memberikan dampak buruk bagi kesehatan, sosial, dan ekonomi. Menghadapi gangguan akibat bencana ini komunitas harus mampu beradaptasi agar dapat bertahan hidup, terutama komunitas miskin yang merupakan kelompok rentan. Komunitas miskin merupakan komunitas yang tidak berdaya serta memiliki keterbatasan ekonomi. Ancaman besar akibat pandemi ini ialah akan meningkatkan kemiskinan akibat guncangan ekonomi dan pembatasan aktivitas. Tujuan penelitian ini akan mengkaji ketahanan komunitas miskin di pedesaan menghadapi pandemi yang ditinjau melalui kapasitas adaptasi dan tindakan kolektif komunitas. Metode yang digunakan adalah survei menggunakan instrumen kuesioner, observasi, dan wawancara mendalam. Pemilihan responden menggunakan teknik sample random sampling dan didapatkan sample sebanyak 40 responden. Hasil penelitian menunjukkan bahwa ketahanan komunitas miskin di pedesaan tidak terbangun karena komunitas tidak mampu beradaptasi dalam menghadapi pandemi dan tidak adanya upaya kolektif yang dilakukan untuk mengatasi permasalahan bersama selama pandemi. Komunitas cenderung mengandalkan bantuan dan dukungan eksternal dari pihak luar komunitas untuk bertahan menghadapi pandemi Covid-19., The Covid-19 pandemic that has occurred since the beginning of 2020 until now has had a negative impact on health, social and economy. Facing the disruption caused by this disaster, the community must be able to adapt in order to survive, especially the poor who are a vulnerable group. The poor community is a community that is powerless and has economic limitations. The big threat due to this pandemic is to increase poverty due to economic shocks and restrictions on activities. The purpose of this research is to examine the resilience of rural poor communities to face pandemics in terms of adaptive capacity and community collective action. The method used is a survey using a questionnaire instrument, observation, and indepth interviews. Selection of respondents using a random sampling technique and obtained a sample of 40 respondents. The results showed that the resilience of poor rural communities was not developed because the community was unable to adapt to the pandemic and there was no collective effort to overcome common problems during the pandemic. Communities tend to rely on external assistance and support from outside the community to survive the Covid-19 pandemic
Keyword: adaptation capacity, collective action, community resilience

Judul: Separation of Neodymium from U3Si2/Al Fuel Plate for Burn-Up Determination
Abstrak: Neodymium is a common fission product produced in nuclear fission reactions. Neodymium in this study was chosen as a burn-up indicator for U3Si2/Al fuel element plates because the neodymium isotope is a stable fission product with a fairly high yield. Some procedures were carried out to separate neodymium, starting with the separation of cesium isotopes (137Cs, 134Cs) through the precipitation method, then separation of uranium isotopes (235U, 238U) and plutonium isotopes (239Pu, 238Pu) with Dowex 1x8 ion exchange resin, and separation of neodymium (Nd), samarium (Sm), as well as cerium (Ce) with Dowex 1x4 ion exchange resin. The Cs recovery reached 99.95%. The U and Pu isotopes resulting from the separation are subjected to an electrodeposition process and the weight of each isotope can be measured with an alpha spectrometer. The separation results of Nd from Sm and Ce have been proven using an XRF spectrometer. The neodymium isotopes separation was corrected using the standard addition method, and an average total Nd content of 2.4 ppm was obtained in the PEB U3Si2/Al bottom solution. It is hoped that this separation method can be applied in determining burn-up of nuclear fuel.
Keyword: neodymium, burn-up indicator, U3Si2/Al fuel plate