Judul: Merino Sheep Resting Behavior Response to Different Airflow  Velocity
Abstrak: Domba merupakan salah satu hewan yang potensinya terus dikembangkan di Indonesia. Salah satu domba yang dikembangkan di Indonesia adalah domba merino, domba dwiguna yang dimanfaatkan daging dan wolnya. Akan tetapi, kenyamanan ternak seringkali terkendala oleh faktor lingkungan seperti suhu, kelembapan, dan kecepatan angin yang dapat menyebabkan cekaman panas dan perubahan tingkah laku pada ternak. Tujuan penelitian ini untuk mengkaji pengaruh kecepatan aliran udara terhadap respon tingkah laku istirahat domba merino guna memperbaiki manajemen lingkungan mikro pada kandang. penelitian dilakukan selama 30 hari (15 hari tanpa pemberian kipas angin (V0) dan 15 hari dengan pemberian kipas angin (V1)), menggunakan 6 ekor domba merino. Suhu dan kelembapan diukur setiap 1 jam menggunakan thermohygrometer digital mulai pukul 10.00-15.00 WIB setiap harinya. Kecepatan angin diukur dengan anemometer, sedangkan durasi dan frekuensi istirahat diamati menggunakan CCTV. Resiko heat stress yang dialami ternak diukur menggunakan rumus temperature humidity index (THI) untuk mengetahui klasifikasi heat stress pada ternak. Perhitungan perbandingan rata-rata tingkah laku istirahat domba digunakan rumus uji-t dengan bantuan software SPSS dan microsoft excel. Hasil penelitian menunjukan bahwa pemberian kipas efektif menurunkan suhu lingkungan dan THI pada ternak. Selain itu, penggunaan kipas dapat meningkatkan durasi istirahhat pada ternak (P<0,01)., Sheep is one of the potential animal that keep to be developed in Indonesia. One of the bred sheep in is used for its meat and wool. However, livestock's comfort is often constrained by environmental factors such as temperature, humidity, and wind velocity which cause livestock's heat stress and behavioral changes. The purpose of this study is to determine the effect of air flow velocity on the response of merino sheep's resting behavior in order to improve micro environment management in the cage. The study was conducted in 30 days (15 days without a fan (V0) and 15 days with a fan (V1)), using 6 merino sheep. Temperature and humidity were measured every 1 hour using a digital thermohygrometer starting at 10.00-15.00 WIB every day. Wind speed was measured by anemometer, while the duration and frequency of rest were observed using CCTV. The risk of animal's heat stress is measured using the temperature-humidity index (THI) formula to determine the classification of livestock's heat stress. Calculation the average comparison of sheep resting behavior used the t-test formula and support by SPSS software and Microsoft Excel. The results showed that giving a fan is effectively reducing environmental temperature and THI in livestock.In addition, the use of fan increase the duration (P<0,01) and decrease the rest frequency in livestock
Keyword: domba, kecepatan aliran udara, merino, suhu, tingkah laku istirahat, air flow speed, merino, sheep, rest behavior, temperature

Judul: The effect of shearing wool on sheep's behavior
Abstrak: Sheep are homeotherms or warm-blooded animals that can maintain their body temperature in a safe range, known as the thermoneutral zone, without making any impacts on their bodies. Environmental and genetic factors could affect the productivity of sheep, but the most influential is environmental factors. Temperature and humidity are some environmental factors that have a direct impact on animals. The purpose of this study is to analyze the effect of shearing wool on sheep's behavior. Ten sheep are classified into 2 treatment groups, shorn sheep (P) and unshorn sheep (TP) will be observed in the field laboratory of small ruminants, Faculty of Animal Science, IPB University for thirty days from February until March 2021. The results of this research show the effect of shearing was significant (P<0,05) on ingestive, drinking, agonistic, eliminative, resting, sleeping, caregiving, locomotion, standing and rumination behavior., Domba merupakan hewan homeoterm atau hewan berdarah panas yang mampu mempertahankan suhu tubuhnya pada kisaran tertentu, yang disebut zona termoneutral, tanpa menimbulkan dampak apa pun pada tubuhnya. Faktor lingkungan dan genetik dapat mempengaruhi produktivitas domba, namun faktor yang paling berpengaruh adalah faktor lingkungan. Penelitian ini bertujuan mengevaluasi pengaruh pencukuran wol terhadap tingkah laku domba. Penelitian ini menggunakan 10 ekor domba yang dibagi menjadi 2 perlakuan yaitu domba yang dilakukan pencukuran (P) dan domba tanpa pencukuran (TP) di Laboratorium Lapang Ruminansia Kecil, Fakultas Peternakan, IPB University dari Bulan Februari sampai Maret 2021. Hasil analisis menunjukkan bahwa pencukuran wol pada domba berpengaruh nyata (P<0,5) terhadap tingkah laku ingestive, minum, agonistic, eliminative, berbaring, tidur caregiving, locomotion, berdiri dan ruminasi
Keyword: behavior, humidity, sheep, temperature

Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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