Judul: Karakteristik Warna Benang Wol Domba Batur yang Diberi Pewarna Alami
Abstrak: Batur sheep wool can be used as handicraft with high economic value. All this time, during the processing of turning wool into handicraft, syntetic color is still used. Syntetic color has side effects to both health and environment. The aim of this research was to study Batur sheep wool quality given natural dyes treatment. The measured variables consisted of water absorbance, dimensional stability, color intensity, and color fade resistance. Repetition was done 3 times to observe water absorbance, dimension stability, color intensity, and color fade resistance. Data were analyzed using T-test. Result showed that comparison between natural and synthetic dyes in water absorbance and shrinkage of Batur sheep wool were not significantly different (P>0.05). Color intensity showed that wool given natural dyes treatment appeared darker than wool given synthetic dyes. Color fade resistance of wool given yellow natural dyes is the best from the other
Keyword: wool yarn, natural dye, batur sheep

Judul: Persentase Rendemen Berat Wol Domba Garut dan Domba Batur Selama Proses Pengolahan serta Kualitas Benang yang Dihasilkan
Abstrak: The wool of local sheep is still a by-product that can be used for some craft products. The aims of this research were to study the wool weight yield during the processing and to know quality of the wool yarn. Parameters were consisted of wool weight yield percentage during sorting I, washing, sorting II, carding and during spinning, and the quality of yarn, i.e, strength and elongation of the yarn. This research used the T-test analysis. There were 5 repetitions for observed wool weight yield during the process; 2 repetitions for strength and elongation of the wool yarn from garut sheep; and 5 repetitions for strength and elongation of the wool yarn from batur sheep. The results showed that percentage of wool weight yield from garut and batur sheep was not significantly different, except for the yield in spin stage that tended to be different. The yarn quality was statistically similar between two types of wool, but for the elongation they tended to be different. Sheep breed difference was not significant on wool weight yield and yarn quality. It is concluded that wool of garut sheep can be processed to make yarn, as same as wool of batur sheep.
Keyword: yarn quality, wool weight yield, garut sheep, batur sheep

Judul: A Continuous Vaccination Strategy in the SVIR Epidemic Model
Abstrak: Vaccination is conducted to minimize the spread of a disease. The vaccination is usually done several times within a fixed time interval. In the SVIR model, it is assumed that individuals do not get immediate immunity following a vaccination program. So according to process of vaccination on SVIR model, there are two strategies, i.e. the continuous vaccination strategy (CVS) and the pulse vaccination strategy (PVS). In this study, only the CVS strategy in epidemic model SVIR is considered. Results of the study indicate that dynamics of the CVS system depends on the basic reproductive number. If the basic reproductive number is less than one, then the disease-free fixed point is asymptotically stable. It means that the disease will eventually disappear from the population. Conversely, if the basic reproductive number is greater than one, then the endemic fixed point is asymptotically stable, which means that the disease will remain exist in the population. Simulation result shows that the vaccination would minimize the spread of disease by reducing the basic reproductive number. If the time for the vaccinated recipients to obtain the immunity, as well as a possibility of vaccinated recipients to be infected are neglected, then the disease will be eradicated. This condition is called an over-evaluating effect of vaccination.
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