Judul: Pengoptimuman Biaya Persediaan Barang yang Mudah Rusak dalam Sistem Dua Gudang dan dengan Penundaan Pembayaran
Abstrak: Setiap pelaku usaha pada umumnya memiliki persediaan bahan atau barang yang harus disimpan di dalam gudang. Jika gudang yang dimiliki mempunyai kapasitas penyimpanan yang terbatas maka pelaku usaha harus menambah gudang, antara lain dengan menyewa gudang kedua untuk menyimpan kelebihan barang. Dalam karya ilmiah ini, dibahas model persediaan untuk barang yang mudah rusak yang disimpan di dua gudang dengan penundaan pembayaran dan diasumsikan permintaan konstan. Di sini gudang kedua diasumsikan menawarkan fasilitas yang lebih baik sehingga menghasilkan tingkat kerusakan yang lebih rendah tetapi dengan biaya penyimpanan yang lebih tinggi. Dari model ini akan diperoleh banyak barang yang harus dipesan dan waktu pemesanan yang meminimumkan total biaya persediaan dan sesuai dengan waktu penundaan pembayaran. Solusi hampiran dari model persediaan diperoleh dengan menggunakan metode Newton-Raphson, Every business actor has a stock of materials stored in the warehouse. Their own warehouse has limited storage capacity, so they must add another warehouse, among others, by renting a second warehouse to store excess goods. They must rent the other warehouse for excess of units. This paper discusses the inventory model for two warehouses for deteriorating items with delayed payment assumed constant demand. The second warehouse is assumed to offer better facilities with a lower rate of deterioration but charges higher holding costs. From this model, it will be obtained the number of items that must be ordered and the time of order which minimizes the total cost of inventory and under the time of delay in payment. The approximate solution of the inventory model is obtained using the Newton-Raphson method.
Keyword: sistem dua gudang, kerusakan, metode Newton-Raphson, model persediaan, penundaan pembayaran

Judul: Optimization of Inventory Model with Constant Level of Deterioration and Credit Payment
Abstrak: Persediaan adalah stok barang yang disimpan oleh distributor atau perusahaan yang dijual kepada pelanggan di waktu yang akan datang. Untuk memenuhi permintaan pelanggan, diperlukan pengendalian persediaan dengan menentukan kapan barang akan dipesan dan kuantitas barang yang dipesan agar biaya total yang dikeluarkan minimum. Dalam sistem ini terjadi beberapa jenis barang yang dapat mengalami kerusakan sehingga tidak dapat disimpan dalam jangka waktu yang lama. Selain itu, distributor memiliki situasi tidak dapat membayar biaya pembelian secara tunai kepada pemasok atau manufacturer sehingga dilakukan pembayaran dengan sistem kredit. Karya ilmiah ini membahas model Economic Order Quantity dengan tingkat kerusakan konstan dan pembayaran secara kredit. Untuk itu diformulasikan masalah persediaan untuk menentukan banyak pesanan dan periode pengisian ulang sehingga dapat meminimumkan biaya total persediaan. Selain itu, ditinjau pula pengaruh tingkat kerusakan, tingkat suku bunga, dan batas waktu kredit terhadap periode pengisian ulang, kuantitas barang yang dipesan, dan biaya total persediaan., Inventory is stock items stored by distributors or companies that are sold to customers in the future. In order to meet customer demand, inventory control is needed by determining the order time and the order quantity so that the total costs incurred are minimum. In this system, several types of items can deteriorate so that they cannot be stored for a long period of time. Furthermore, the distributor has a situation where he cannot pay the purchase cost in cash to the supplier or manufacturer so that payment is made using the credit system. In this work, we discuss the Economic Order Quantity model with constant level of deterioration and credit payments. For this purpose, an inventory problem is formulated to determine the number of orders and the replenishment period so as to minimize the total cost of inventory. In addition, it is also examined the effect of the level of deterioration, interest rates, and credit times limits on the replenishment period, the quantity of items ordered, and the total cost of inventory.
Keyword: credit, Economic Order Quantity, inventory, optimization

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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