Judul: Rapid test for organophosphate and organochlorine insecticide residues with digital multimeter
Abstrak: Pengembangan metode untuk pemantauan residu pestisida di lapangan yang cepat, akurat, serta murah sangat dibutuhkan, salah satunya dengan alat multimeter digital. Metode pengujian ini berdasarkan adanya perbedaan tahanan arus yang dimiliki oleh berbagai bahan aktif. Nilai hasil pengujian standar dan contoh divalidasi dengan beberapa parameter, yaitu linearitas, ketepatan, ketelitian, dan batas deteksi. Validasi metode yang dilakukan pada insektisida klorpirifos, diazinon, dan diklorvos dari golongan organofosfat serta DDT, aldrin, dan heptaklor dari golongan organoklorin dalam contoh sayuran bawang merah, cabai merah, dan kubis, memberikan ketelitian dan batas deteksi yang cukup baik. Akan tetapi, linearitas dan ketepatannya masih kurang baik. Berdasarkan hasil ini, metode analisis residu pestisida dalam sayuran dengan bantuan multimeter digital berpotensi untuk dikembangkan sebagai metode pengujian, dengan melakukan beberapa perbaikan pada tahap ekstraksi contoh. Kata kunci: multimeter digital, organofosfat, organoklorin, pestisida, validasi, Development of rapid, acurate, and affordable method for monitoring of insecticide residues in the field is a need, for example is by using digital multimeter. This testing method is based on the various current resistance of the active components. Testing results of pesticide standards and samples were validated by several parameters, namely linearity, accuracy, precision, and limit of detection. The method validation performed on chlorpyrifos, diazinone, and dichlorvos from the organophospate group as well as DDT, aldrine, and heptachlor from the organochlorine group in onion, chilli, and cabbage, gave good results for precision and limit of detection. However, the linearity and accuracy were still below the acceptable requirements. These results show that the analytical method of pesticide residues in vegetables by means of a digital multimeter has the potential to be used as a test method, by improving the extraction phase of samples. Key words: digital multimeter, organochlorine, organophosphate, pesticide, validation
Keyword: multimeter digital, organofosfat, organoklorin, pestisida, validasi

Judul: Quick Detection of Storage-product Pests Sitophilus zeamais (Coleoptera: Curculionidae) and Callosobruchus maculatus (Coleoptera: Bruchidae) using Thermal Imagine Camera FLIR ONE Pro
Abstrak: Sitophilus zeamais dan Callosobruchus maculatus adalah hama pada produk penyimpanan yang serius. Pemantauan populasi dan dinamika hama saat ini menjadi salah satu aspek terpenting dari pengelolaan hama gudang. Diperlukan metode pendeteksian yang cepat dan akurat tanpa merusak komoditas. Penelitian ini bertujuan untuk mengetahui potensi kamera termal FLIR ONER Pro dalam mendeteksi keberadaan hama gudang S. zeamais pada beras dan jagung serta C. maculatus pada wadah plastik berisi kacang hijau. Penelitian ini dilakukan dengan cara merekam citra termal untuk mengetahui suhu masing-masing perlakuan menggunakan kamera FLIR ONER Pro untuk mendeteksi hama di dalam wadah plastik. Ada empat perlakuan untuk populasi hama yang berbeda di setiap wadah dan satu kontrol. Percobaan dirancang menggunakan rancangan acak lengkap dengan tiga ulangan. Perekaman citra termal dilakukan setiap minggu selama 10 minggu. Itu data dianalisis secara statistik menggunakan analysis of variance (ANOVA), dilanjutkan dengan uji Duncan pada taraf 5%. Hasil percobaan menunjukkan bahwa kamera termal FLIR ONER Pro dapat dengan cepat dan akurat mendeteksi keberadaan hama gudang pada populasi yang berbeda. Kata kunci: beras, gambar digital, jagung, kacang hijau, pengendalian hama., Quick Detection of Storage-product Pests Sitophilus zeamais (Coleoptera: Curculionidae) and Callosobruchus maculatus (Coleoptera: Bruchidae) using Thermal Imagine Camera FLIR ONER Pro. Supervised by PURNAMA HIDAYAT and DEWI SARTIAMI. Sitophilus zeamais and Callosobruchus maculatus are serious storage-product pests. Monitoring the present and population dynamic of the pests is one of the most important aspects of stored pest management. A quick and accurate detection method without destroying the commodities is needed. This research aimed to determine the potential of the FLIR ONER Pro thermal camera for detecting the presence of the storage pests S. zeamais in rice and corn and C. maculatus in mung bean-containing plastic containers. This research was carried out by recording thermal images to determine the temperature of each treatment using the FLIR ONER Pro camera to detect the pests inside plastic containers. There were four treatments for different populations of pests in each container and one control. The experiments were designed using a completely randomized with three replicates. Thermal image recording was done weekly for 10 weeks. The data were analyzed statistically using analysis of variance (ANOVA), followed by Duncan's test at the 5% level. The results of the experiments suggested that the thermal camera FLIR ONER Pro can quickly and accurately detect the presence of storage pests in different populations
Keyword: corn, digital image, mung bean, pest management, rice

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology