Judul: Penerapan Hotspot Analysis dan Regresi Logistik pada Kasus Difteri di Jawa.
Abstrak: Difteri merupakan penyakit yang mudah menular, mematikan, dan ditetapkan sebagai Kejadian Luar Biasa (KLB) di Indonesia. Sebagai tindakan penanggulangan KLB, pemerintah melaksanakan Outbreak Response Immunization (ORI) yang bertujuan menutup kesenjangan imunitas (immunity gap). Penelitian ini bertujuan untuk mengidentifikasi daerah hotspot kasus difteri, faktor yang memengaruhinya, dan melihat dampak pelaksanaan ORI pada daerah hotspot dan bukan hotspot. Metode yang digunakan untuk mendeteksi hotspot adalah Getis-Ord . Untuk mengetahui faktor-faktor yang memengaruhi terbentuknya daerah hotspot, dilakukan uji parameter simultan dan parsial pada model regresi logistik. Data yang digunakan berasal dari profil kesehatan tiap provinsi di Jawa pada tahun 2017. Dari hasil penelitian, terdapat 20 daerah yang ditetapkan berstatus hotspot. Faktor yang memengaruhi terbentuknya daerah hotspot yaitu kepadatan penduduk dan persentase desa Universal Child Immunization (UCI). Berdasarkan hasil pembandingan kasus difteri pada tahun 2017 dan 2018, pelaksanaan ORI sebagai tindakan penanggulangan KLB difteri cukup baik. Penetapan lokasi ORI oleh Kementerian Kesehatan sudah tepat. Namun, cakupan imunisasi tidak merata sehingga masih terdapat daerah dengan peningkatan kasus yang tinggi meskipun ORI sudah dilaksanakan.
Keyword: difteri, hotspot analysis, ORI, regresi logistik

Judul: The Analysis of Factors Affecting Diphtheria Disease in East Java on 2017
Abstrak: Diphtheria is a contagious disease caused by the Corynebacterium diphtheria bacteria that attacks the upper respiratory system. Poisson regression method was used to model diphtheria data and its relations between diphtheria cases and various factors assuming equidispersion. However, data of contagious disease may produce overdispersion outcome. Hence, negative binomial regression was implemented. Akaike’s Information Criterion (AIC) was used to measure goodness of fit of the model. Negative binomial regression was chosen as a better model as it showed lower AIC value than Poisson regression. Factors that influenced number of diphtheria cases in East Java were immunization coverage, population density, and percentage of UCI village.
Keyword: Diphtheria, Negative Binomial regression, overdispersion, Poisson regression

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