Judul: Analisis kestabilan model feline immunodeficiency virus (Fiv)
Abstrak: Feline Immunodeficiency Virus (FIV) dikenali sebagai virus yang menyebabkan penyakit AIDS ( penyakit hilangnya kekebalan tnbnh ) pada kocing. FIV merupakan bagian dari lentivirus subfamily dari retrovirus, yang didalamnya termasuk retrovirus pada manusia (HIf/) dan retrovirus pada kera (SIf/). Melalui interaksi antar kocing, FIV menyebar secara epidemi melalui gigitan. Penyebaran FIV ini digambarkan dengan suatn model matematis yang memuat sejumlah persamaan diferensial biasa non linear yang didasarkan pada prinsip-prinsip epidemi standar. Model iui mendeskripsikan penyebaran FIV dalam suatu populasi konstan. Populasi konstan ini dibagi menjadi dua kelas individu yakui rentan, terinfeksi.
Keyword: 

Judul: Analisis kestabilan titik tetap pada model penularan HIV
Abstrak: Virus HIV merupakan virus penyebab AIDS yang melumpuhkan sistem kekebalan tubuh. Penyebaran virus inj teros terjadi dan mempengaruhi semua wilayah. Peluang terbesar penulanm virus ini adalah me1alui hubungan seksual. Penularan HIV dalarn suatu populasi dijelaskan melalui suatu diagram alur. Dalam diagram tersebut terdapat empat kelompok popuiasi, yaitu kelompok wanita dengan aktivitas seksual tinggi (wanita inti). kelompok wanita dengan aktivitas seksual rendah (wanita noninti), poa single, dan kelompok pasangan yang telah menikah. Pada masing-masing kelompok populasi tersebut dibagi menjadi individu rentan dan individu terinfeksi. Berdasarkan
Keyword: 

Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell