Judul: Studi Sistem Perencanaan Produksi Hirarkis dalam Penentuan Tingkat Produksi Detail pada Industri Pertanian
Abstrak: Masalah perencanaan produksi memerlukan sederetan keputusan melalui peride waktu yang panjang pada berbagai tingkat (level)dalam proses perencanaan . Untuk mendapatkan keputusan yang lebih operasional , manajer perlu mendisagregasikan hasil perencanaan produksi agregat ke dalam jadwal induk produksi . Hencana agregat memberikan petunjuk keseluruhan bagi jadwal induk produksi yang menentukan waktu dan besar produksi produk-produk individu . Umpan balik dari performansi jadwal induk aktual akan memberikan informasi perencanaan agregat periode berikut - nya.
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Judul: Model simulasi sistem pengendalian produksi pada industri pengolahan hasil holtikutura
Abstrak: Lokasi produsen hasil hortikultura dan skala produksi beragam, yang sifat alami dan sifat pasar hasil hortikultura yang umumnya merupakan pasar terbuka menyebabkan pengkajian produksi pada industri pengolahan hasil hortikultura menjadi Kompleks. Pengkajian pengendalian produksi perlu dilakukan untuk meningkat- kan efisiensi dan efektivitas penggunaan sumber daya yang terba- tas dalam produksi produk olahan hasil hortikultura. Studi pengendalian produksi pada industri pengolahan hasil hortikultura dilakukan dengan pendekatan sistem. yang Komponen utama. terlibat dalam sistem produksi yang dikaji adalah pemasok (supplier), produsen (pabrik) dan konsumen. Metoda dan teknik yang digunakan dalam studi adalah fungsi alih dengan transformasi Laplace dan teknik waktu tunda. Teknik simulasi digunakan melalui model PRODALJ untuk mengetahui perila- ku sistem dalam hubungannya dengan waktu dan peubah acak. Model PRODALI yang dikembangkan terdiri dari tiga sub-model. Sub-model INMACON untuk telaah pengendalian persediaan bahan mentah dengan penerapan teknik waktu tunda diskrit. Sub-model INPROCON untuk telaah pengendalian persediaan produk jadi penerapan Sub-model CESCON teknik waktu tunda kontinyu. pengkajian sistem pengendalian laju proses produksi. dengan untuk Pengendalian pada sub-model INMACON dan sub-model INPROCON dilakukan berdasarkan jumlah persediaan bahan mentah dan produk Jadi yang diinginkan berada di gudang. Pengendalian pada sub- model CESCON dilakukan berdasarkan laju masukan buah yang inginkan ke dalam proses pengolahan. Kendali-kendali yang rapkan adalah kendali proporsional (P), kendall diferensial Kendali (D), kendali kendali integral didite- (I), proporsional-integral (PI), proporsional-diferensial (PD) dan kendali Integral-diferensial (PID). Verifikasi model dilakukan berdasarkan data dan yang diperoleh dari PT Great Giant Pineapple Company, informasi Lampung. Verifikasi model. dan analisis tanggapan sistem digunakan untuk menilai hasil pengendalian. Hasil simulasi menunjukkan bahwa kendali proporsional dan Kendali proporsional-diferensial efektif diterapkan pada sistem pengendalian produksi…dst
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Judul: Seroprevalence of Chikungunya and The Risk of Transmission Transmitted Among Blood Donors In Sulawesi-Indonesia
Abstrak: Chikungunya (CHIK) is an arthritogenic alphavirus in the Togaviridae family of arboviruses with an enveloped RNA containing a positive single-stranded 11.8 kb genome. Transmission occurs through the bite of infected Aedes mosquitoes, which are commonly found in tropical and temperate regions. Primary vertebrate hosts include monkeys and humans, in whom this virus replicates efficiently (Diallo et al. 1999). Chikungunya virus (CHIKV) is known for causing acute illness, manifesting with fever, rash, and arthralgia known as Chikungunya fever (Horwood dan Buchy 2015). Despite the high number of Chikungunya cases in Indonesia, comprehensive data are lacking in CHIKV seroprevalence. Previous studies reported the median seroprevalence of anti-CHIKV antibodies in all situations 18.5%, ranging from 0.0 – 73.% (Harapan et al., 2019). However, the gap in epidemiological data of CHIKV in many regions of Indonesia including Sulawesi, is noteworthy. The objective of this study was to determine the seroprevalence of CHIKV infection among healthy individuals from North and South Sulawesi using archive samples. Additionally, an asymptomatic course of CHIKV infection and the high pre-symptomatic viral load as 108pfu/mL (Appassakij et al. 2013) suggest that the infection can threaten blood transfusion safety. Evidence of CHIKV infection among blood donors (Simmons et al. 2016) indicates transfusion-transmitted is probable, although it has not been documented (Petersen dan Epstein 2014). Our study also aimed to test the archive blood donor specimens from North Sulawesi for CHIKV IgM and viremia to determine blood safety in endemic areas. Samples were screened for anti-CHIKV IgG antibodies to determine exposure to CHIKV using an in-house IgG ELISA as previously described (Kosasih et al. 2013) with minor modifications. CHIKV IgM, a marker for recent infection and endemicity, was tested in 303 samples randomly selected from IgG-positive samples using a Euroimmun anti-CHIKV IgM ELISA kit (Luebeck, Germany) following the manufacturer’s instructions. CHIKV RNA detection was carried out using one-step-qRT-PCR. The data generated were analyzed with IBM-SPSS v20 (IBM Corporation, USA). Chi-square (χ2) test to determine significant differences between categorical variables, and a p-value less than 0.05 was considered statistically significant. As many as 1092 serum and plasma samples were analyzed, with CHIK IgG seropositivity at 53.48% (584/1092). The results also show a statistically significant difference in the seropositive rates based on gender (58.8% male and 48.5% female) and region (53.9% South Sulawesi versus 48.7% North Sulawesi). Seropositivity increased with age; approximately half of adults between their 40s and 60s had seroconverted. Most of the participants, 304 (27.8%), were between 21-30 years. The age groups with the least participants were those >60 years and <20 years, with 93 participants each (8.5%), followed by the 51–60-years age group with 142 (13.0%) participants. In addition to IgG, the overall anti-CHIKV IgM seropositivity comprised 12.9% (39/303). A Chi-square analysis shows a statistical significance of anti-CHIKV IgM seropositivity based on gender and region with p-values (p=0.047 and p=0.038, respectively). On the contrary, there was no significant difference in anti-CHIK IgM based on age. The age group with the most participants was the 21-30 years with 19.3% (16/83), while those with the least participants were those >60 years. The current study
Keyword: Chikungunya, Serosurvey, Sulawesi, Blood donors, ELISA, qRT-PCR.