Judul: Penyelesaian Masalah Dynamic Lot Sizing dengan Algoritme Wagelmans-Hoesel-Kolen
Abstrak: Suatu perusahaan baik perusahaan perdagangan atau perusahaan industri selalu mempertimbangkan masalah persediaan barang. Tanpa adanya persediaan, perusahaan akan menghadapi risiko tidak dapat memenuhi permintaan pelanggannya. Masalah persediaan pada dasarnya akan menimbulkan biaya antara lain biaya pemesanan, biaya penyimpanan, dan biaya pembelian. Karya ilmiah ini membahas pengoptimuman biaya yang dikeluarkan perusahaan dalam masalah persediaan barang dengan banyak periode menggunakan algoritme Wagelmans- Hoesel-Kolen untuk mengetahui pada periode berapa pemesanan akan dilakukan serta banyaknya barang yang akan dipesan.
Keyword: Kata kunci: inventori, ukuran lot dinamis, Wagelmans-Hoesel-Kolen, inventori, ukuran lot dinamis, Wagelmans-Hoesel-Kolen

Judul: Pengoptimuman Masalah Persediaan dalam Menghadapi Penawaran Diskon dan Dua Jenis Biaya Backorder
Abstrak: Persediaan adalah stok bahan yang digunakan untuk mempermudah produksi pada suatu perusahaan manufaktur. Perusahaan perlu mampu mengatur jumlah kuantitas produk dan waktu pemesanan yang efektif. Terkadang perusahaan tidak memiliki persediaan yang cukup sehingga mengganggu proses pendistribusian produk. Kondisi tersebut disebut dengan backorder. Selain kondisi backorder, terkadang pemasok juga memberikan potongan harga kepada perusahaan manufaktur. Penawaran diskon akan mengakibatkan perusahaan membeli kuantitas pesanan khusus yang jumlahnya perlu ditentukan agar mendapatkan keuntungan maksimal. Salah satu model untuk masalah persediaan adalah Model Economic Order Quantity (EOQ). Karya ilmiah ini membahas Model EOQ dengan diskon dan Model EOQ dengan backorder yang dikembangkan untuk tiga skenario berbeda. Setiap skenario dibedakan berdasarkan waktu dan objek penerapan diskon. Selanjutnya, akan dihasilkan formulasi masalah persediaan untuk menentukan kuantitas pesanan khusus agar biaya total persediaan minimum pada setiap skenario., Inventory is the stock of materials used to facilitate production in a manufacturing company. Companies need to be able to manage the number of quantities and order time effectively. Sometimes the company does not have enough inventory, it interferes with the product distribution processes. This condition is known as backorders. In addition to backorder conditions, sometimes suppliers also provide price discounts to manufacturing companies. A discount offer makes the company buy an additional order quantity whose amount needs to be determined to get maximum profit. One of the models for inventory problems is the Economic Order Quantity (EOQ) model. This paper discusses the EOQ Model with discounts and the EOQ Model with backorders developed for three different scenarios. Each scenario based on the time and object of applying the discounts. Next, an inventory problem formulation is generated to determine the number of additional orders so that the total inventory cost is minimum in each scenario.
Keyword: backorder, discount, EOQ model, inventory control

Judul: Pengaruh Pemberian Ekstrak Minyak Jinten Hitam (Nigella sativa) Terhadap Gambaran Mikroskopis Paruparu Mencit (Mus musculus)
Abstrak: This study was aimed to get information about the effect of blackseed (Nigella sativa) effect on the histopathology of mice lung. Twelve male mice of 4 weeks old were divided into four groups, each group consisted of three mice. Group K or negative control received aquadest, group HS 0.1 was received 0.1 ml blackseed oil, group HS 0.2 was received 0.2 blackseed oil and group HS Madu was received 0.3 ml mixed of blackseed oil and honey (1:20) for two months. At the end of the experiment, the mice were euthanized by atlanto occipital dislocation and necropsied to collect the lung sample. The lungs were processed to prepare the histopathology slides with Hematoxyllin-Eosin and Periodic Acid Schiff (PAS) stain. The parameters observed include counting percentage of bronchus and bronchial presenting exudates, counting the goblet cell between the respiratory epithelial cell, calculating the BALT area, counting the limfoid cell density of the BALT, counting the congestion, hemorrhage, inflammation and emphysema area on the certain fields of view, measuring the thickness of smooth muscle surround bronchial using Image J® for Microsoft® Windows®. Quantitative data were analyzed using SPSS® 16.0 software and ANOVA test followed Duncan test. The result showed that Nigella sativa treatment does not lead to increase exudation in the bronchus and bronchioles lumen,a decrease in the activity of goblet cells, a decrease the BALT area and an increase in the lymphoid cell density,a reduce the area of congestion and hemorrhage, inflammation and emphysema, reduction at the smooth muscle thickness. The blackseed content such thymoquinone and longifolene were thought to provide a favorable effect on lung histomorphology.
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