Judul: Physiological Responses and Milk Productivity of Etawa Crossbreed Goats to Water Mist
Abstrak: Kambing Peranakan Etawa cenderung mengalami perubahan perilaku dan respon fisiologis di lingkungan yang panas. Manipulasi suhu lingkungan kandang seperti pengabutan dapat digunakan untuk menghindari ternak dari cekaman panas. Tujuan dari penelitian ini adalah mengetahui pengaruh pengabutan terhadap respon fisiologis berupa frekuensi denyut jantung, frekuensi respirasi, suhu rektal, dan kuantitas susu yang diproduksi kambing Peranakan Etawa. Penelitian ini dilaksanakan pada bulan November-Desember 2021 di Peternakan Al Hafidz Etawa Farm dengan menggunakan sampel sebanyak lima ekor kambing Peranakan Etawa betina dengan usia 32−36 bulan yang berada pada fase akhir laktasi. Data yang diperoleh diolah secara statistik menggunakan uji ANOVA dua arah dan menggunakan uji T berpasangan. Hasil penelitian menunjukkan bahwa respon fisiologis sebelum dan setelah pengabutan menunjukkan hasil yang berbeda nyata (p<0,05) pada setiap waktu pengambilan data. Produksi harian susu setelah pengabutan mengalami penurunan disebabkan pengambilan data pada fase akhir laktasi. Sistem pengabutan sebagai upaya mengurangi stres cekaman panas dapat mempengaruhi respon fisiologis ternak., Etawa Crossbreed goats tend to have behavioral and physiological responses in high-temperature environments. Hence, temperature manipulation of the stall, such as water mist, can be used to prevent the livestock from heat stress. This research aimed to discover the effect of water misting on physiological responses in the form of heart rate, respiration rate, rectal temperature, and quantity of milk produced by Etawa Crossbreed goats. This research was conducted in November-December 2021 at Al Hafidz Etawa Farm using five female Etawa Crossbreed goats aged 32−36 months at the last stage of lactation as the samples. The data obtained were processed statistically using a two-way ANOVA and a paired t-test. The results showed that the livestock psychological responses before andafter the water misting session had significantly different results (p <0.05) at each time of data collection. Daily milk production is decreasing because the data was taken during the last stage of lactation. Inconclusion, the water misting system reduces heat stress in goats and can affect the physiological response of livestock.
Keyword: kambing Peranakan Etawa, pengabutan, produksi susu, respon fisiologis, Etawa Crossbreed goats, milk production, physiological responses, water misting

Judul: Physiological Responses to Water Misting Using Water Sprinkler on Dairy Cattle
Abstrak: Peternakan sapi perah di dataran rendah dengan iklim tropis memerlukan rekayasa mikroklimat agar ternak berada pada Temperature Humidity Index (THI) yang mendekati zona nyaman sehingga produktivitas sapi perah meningkat. Penelitian ini bertujuan mempelajari pengaruh pengabutan air dengan sprinkler water terhadap mikroklimat kandang dan respon fisiologis sapi perah. Penelitian dilakukan pada tiga ekor sapi perah selama lima hari di Kandang Sapi Perah J’rami Farm, Desa Kebon Pedes, Kota Bogor. Pengambilan data mikroklimat dan respon fisiologis dilakukan sebelum dan sesudah pengabutan air pada siang hari selama satu jam. Metode analisis yang digunakan adalah uji-T berpasangan untuk variabel mikroklimat kandang dan respon fisiologis, serta Two Way Anova untuk mengetahui perbedaan suhu permukaan tubuh. Hasil penelitian menunjukkan bahwa perlakuan sebelum dan sesudah pengabutan air pada siang hari berbeda nyata (P<0,05). Hasil perlakuan pengabutan air mampu memperbaiki kondisi mikroklimat kandang dan respon fisiologis sapi perah yang ditandai dengan penurunan nilai THI, frekuensi denyut jantung, frekuensi pernapasan, suhu rektal, dan suhu permukaan tubuh., Dairy farming in the lowlands with tropical climate requires microclimate engineering, so the cattleshed are at Temperature Humidity Index (THI) which is close to the comfort zone and the productivity of dairy cattles increases. This study aims to study the effect of misting water with sprinkler water on the cattleshed microclimate and the physiological response of dairy cattles. The study was conducted on three dairy cows for 5 days located at the J'rami Farm Dairy Cattle, Kebon Pedes Village, Bogor City. Microclimatic data collection and physiological response were carried out before and after the misting water during the day for one hour. The analytical method used was a paired T-test for cattleshed microclimate and physiological response variables, and Two Way Anova to determine differences in body surface temperature. The results showed that the treatment before and after misting water during the day was significantly different (P<0.05). The results of the misting water treatment were able to improve the cattleshed conditions and the physiological response of dairy cattles which was marked by a decrease in the value of THI, heart rate frequency, respiratory frequency, rectal temperature, and body surface temperature.
Keyword: Mikroklimat, pengabutan air, respon fisiologis, sapi perah, sprinkler water

Judul: Konstruksi Kode Linear Biner Optimal Kuat Berjarak Minimum 13 Dan 15
Abstrak: A linear binary code of length n over is defined as subspace of . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d]-code. The main problem in algebra coding theory is optimizing one of parameters n, k and d. Given two that others were known. Based on Gilbert-Varshamov bound, if a [n, k, d]-code is exist and the code can not be expanded, we call it strongly optimal code. In this thesis, we construct strongly optimal code with minimum distance of 13 and 15. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound, then we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 9 for d = 13 and d = 15.
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