Judul: Sintesis dan Simulasi Kinerja Perisai Radiasi Nuklir Terhadap Paparan Sinar-x/Sinar Gamma dan Berkas Neutron
Abstrak: Telah dilakukan sintesis dan simulasi komposit beton sebagai perisai sinarx/ sinar gamma dan neutron. Sampel yang digunakan sebagai perisai sinarx/ gamma yaitu Beton+Baja Paduan, Beton+Co, Beton+Mn, Beton+Cr, dan Beton kontrol tanpa filler dengan variasi ketebalan masing-masing 2 mm, 4 mm, 6 mm, 8 mm, 10 mm, dan 12 mm. Hasil uji eksperimen dan simulasi perisai sinar-x/sinar gamma menunjukkan bahwa Beton+Baja Paduan memiliki kinerja paling baik dalam menahan radiasi. Koefisien atenuasi linier Beton+Baja Paduan hasil simulasi menggunakan energi foton 0.03295 MeV yaitu 3.8568 cm-1, menggunakan energi foton 0.04295 MeV yaitu 1.8794 cm-1, dan eksperimen yaitu 2.3884 cm-1. Sampel perisai neutron terdiri dari Beton+B4C 6%, Beton+B4C 12%, Beton+B4C 18%, dan Beton kontrol tanpa filler dengan variasi ketebalan masingmasing 3 mm, 5 mm, dan 7 mm. Koefisien atenuasi linier yang didapatkan berturut-turut yaitu 2.6590 cm-1, 3.8822 cm-1, 4.0029 cm-1, 0.1151 cm-1. Beton+B4C 18% memiliki kemampuan terbaik dalam menahan radiasi neutron termal.
Keyword: Beton, Neutron, Perisai radiasi, Sinar Gamma, Sinar-X

Judul: Synthesis of Neutron Radiation Shields Based on Concrete With filler Palm Fiber and Coconut Shell Powder.
Abstrak: Radiasi neutron merupakan radiasi pengion yang memiliki daya tembus yang tinggi, sehingga diperlukan perisai radiasi untuk mengurangi bahaya radiasi neutron. Telah dilakukan sintesis beton dengan filler serat ijuk dan serbuk batok kelapa sebagai perisai radiasi neutron. Bahan perisai radiasi dibuat dengan menggunakan pasir lukulo, semen, kapur, split, air dan penambahan filler serat ijuk dan serbuk batok kelapa sebesar 5%, 10%, dan 20%. Eksperimen ini menggunakan Energy-dispersive X-ray spectroscopy (EDS) untuk analisis unsur. Pengujian serapan neutron menggunakan teknik radiografi neutron dengan metode film menunjukkan bahwa nilai tampang lintang makroskopik (Ʃ) memiliki karakteristik fungsi eksponensial terhadap tebal perisai beton untuk filler serat ijuk 5% yaitu 0,2538 cm-1, filler serat ijuk 10% yaitu 0,2604 cm-1, filler serat ijuk 20% yaitu 0,2754 cm-1, filler serbuk batok kelapa 5% yaitu 0,214 cm-1, filler serbuk batok kelapa 10% yaitu 0,2179 cm-1, filler serbuk batok kelapa 20% yaitu 0,2408 cm-1. Nilai tampang lintang makroskopik (Ʃ) meningkat seiring bertambahnya kadar filler., Neutron radiation is ionizing radiation that has high penetrating power, so radiation shielding is needed to reduce the danger of neutron radiation. Concrete synthesis has been carried out using palm fiber filler and coconut shell powder as a shield for neutron radiation. Radiation shielding material was made by using lukulo sand, cement, lime, split, water, and the addition of 5%, 10%, and 20% of filler fibers and coconut shell powder. The experiment used Energy-dispersive Xray spectroscopy (EDS) for elemental analysis. The neutron absorption test using the neutron radiography technique with the film method showed that the value of the macroscopic cross section had a characteristic exponential function of the thickness of the concrete shield for 5% palm fiber filler, namely 0,2538 cm-1, 10% palm fiber filler that was 0,2604 cm-1, palm fiber filler 20% is 0,2754 cm-1, coconut shell powder filler is 5% that was 0,214 cm-1, 10% coconut shell powder filler was 0,2179 cm-1, coconut shell powder filler 20% was 0,2408 cm-1. The value of the macroscopic cross section rose as filler content increasing.
Keyword: Beton, perisai radiasi neutron, serat ijuk, serbuk batok kelapa, tampang lintang makroskopik, Coconut shell powder, concrete, macroscopic cross section, neutron radiation shielding, palm fiber

Judul: Etno-ornitologi Burung Kancilan Flores (Pachycephala nudigula nudigula Hartert 1897) pada Masyarakat Lio di Taman Nasional Kelimutu
Abstrak: Bare-throathed whistler is one of several wild birds in Kelimutu National Park (TNKL) that is believed to have correlation with Lio Community‟s belief. The estimation of Bare-throated whistler‟s population in Kelimutu National Park was about 186.41-1668.07 individual by the density about 0.0389-0.3481 ind/ha with the sex ratio 6.2:1 that spreaded on area with height of 1100 – 1600 masl. The characteristic of Bare-throated whistler‟s habitat is a natural forest with various canopy level, high plant species diversity and high density. The habitat characteristics related to the availability of food in the form of insects, cover, safety and a nesting site. Generally the most of Lio community knew the existence of Bare-throated whistler directly or from their parents‟ stories. The perceptions of Lio Community to the Bare-throated whistler‟s existence is generally support the conservation efforts. The perceptions construct the Lio Community‟s atitude that tend to be conservative to the existence of Bare-throated whistler. The attitude shown by their behavior that not cathing the Bare-throated whistler from the TNKL‟s area or the outside. The attitude have an important role to the existence of Bare-throated whistler in Kelimutu National Park‟s area.
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