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: Pengembangan Kandang Inovatif Sapi Pedaging untuk Pengelolaan Mikroklimat Melalui Sistem Pengabutan
Abstrak: Sapi pedaging merupakan ternak penghasil daging dari jenis ruminansia besar. Kondisi lingkungan ternak diupayakan tetap berada di thermoneutralzone. Diperlukan sebuah modifikasi lingkungan terkait pengelolaan mikroklimat melalui sistem pengabutan dengan menggunakan alat sprinkler water. Tujuan penelitian ini menganalisis pengelolaan mikroklimat kandang melalui sistem pengabutan dalam memperbaiki respon fisiologis sapi pedaging. Peubah yang diamati yaitu suhu komponen kandang, suhu udara, kelembapan udara, Temperature Humidity Index (THI), frekuensi pernapasan, frekuensi denyut jantung, dan suhu rektal. Metode analisis yang digunakan yaitu uji-T tidak berpasangan 5 kali ulangan. Hasil penelitian menunjukkan bahwa perlakuan sebelum dan setelah pengabutan air pengukuran pagi berbeda nyata (P<0,05) tinggi pada semua peubah yang diamati. Pengabutan air memberikan efek penurunan suhu komponen kandang, suhu udara, kelembapan udara, Temperature Humidity Index (THI), frekuensi pernapasan, frekuensi denyut jantung, dan suhu rektal., Beef cattle are meat-producing livestock of large ruminant species. The environmental conditions of livestock are kept in the thermoneutral zone. An environmental modification related to microclimate management is required through a misting system using a water sprinkler. The purpose of this study was to analyze the microclimate management of the barn through the misting system in improving the physiological response of beef cattle. The variables observed were the temperature of the components of the barn, the air temperature, the air humidity, the Temperature Humidity Index (THI), respiratory frequency, heart rate, and rectal temperature. The analytical method used in this is unpaired T-test five replications. The results showed that the treatment before and after the morning measurement water misting was significantly different (P<0.05) in all the observed variables. Water misting has the effect of decreasing the temperature of the barn components, air temperature, humidity, Temperature Humidity Index (THI), respiratory rate, heart rate, and rectal temperature.
Keyword: beef cattle, fogging process, Innovative barn, microclimate

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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