Judul: Estimasi Bobot Badan berdasarkan Ukuran Tubuh pada Sapi Madura yang Dipelihara secara Intensif
Abstrak: Bobot badan menjadi parameter penting dalam manajemen pembibitan, namun pengukurannya sulit dilakukan karena keterbatasan fasilitas timbangan. Tujuan dari penelitian ini adalah menganalisa hubungan antara variabel antara ukuran linier tubuh dan bobot badan pada sapi madura dengan sistem pemeliharaan intensif. Penelitian ini menggunakan 85 sampel data morfometrik, seperti panjang badan, lingkar dada, tinggi pundak, dan bobot badan yang dikategorikan berdasarkan umur dan jenis kelamin lalu dianalisis dengan metode bivariat Pearson dan regresi linier sederhana. Analisis data dilakukan secara berurutan dari analisis deskriptif hingga uji signifikansi pada taraf 5%. Hasil penelitian menunjukkan bahwa nilai koefisien korelasi dan determinasi tertinggi serta nilai RMSE terendah dari persamaan regresi terdapat pada hubungan variabel lingkar dada dengan bobot badan pada setiap kategori. Salah satu contoh persamaan regresi pada hubungan variabel lingkar dada dengan bobot badan pada sapi madura jantan 205 hari adalah Y=-163,333+2,431X dengan nilai RMSE, R2, dan r masing-masing 2,092, 0,976, dan 0,988, serta memiliki hubungan yang signifikan. Oleh karena itu, variabel lingkar dada dapat digunakan untuk estimasi bobot badan pada sapi madura., Body weight is an important parameter in breeding management, but its measurement is difficult due to limited weighing facilities. This study aims to analyze the correlation between variables between linear body size and body weight in madura cattle cared under intensive rearing system. This study used 85 samples of morphometric data, such as body length, chest girth, wither height, and body weight which categorized based on age and sex, and then analyzed using the Bivariate Pearson method and simple linear regression. The analysis was carried out sequentially from descriptive analysis to significance test at the 5% level. The results showed that the highest correlation and determination coefficient values and the lowest RMSE values from the regression equation were found in the correlation between chest girth and body weight in each category. An example of a regression equation on the correlation between chest girth and body weight in a 205-day-old madura calf is Y=-163,333+2,431X with RMSE, R2, and r values of 2.092, 0.976, and 0.988, and has a significant result. Therefore, the chest girth can be used to estimate body weight in madura cattle.
Keyword: body weight, madura cattle, morphometric, simple linear regression

Judul: Estimasi Bobot hidup Berdasarkan Ukuran Linier Tubuh pada  Pedet Lepas Sapih Sapi Simmental dan Limousine
Abstrak: Estimasi bobot hidup pada seekor sapi dapat memudahkan dalam mengetahui bobot aktualnya. Salah satu cara mengestimasinya dengan menggunakan ukuran linier tubuh sapi. Penelitian ini bertujuan menduga bobot hidup berdasarkan ukuran linier tubuh pedet lepas sapih Simmental dan Limousine. Penelitian menggunakan data sekunder yang diperoleh dari Balai Pembibitan Ternak Unggul dan Hijauan Pakan Ternak Padang Mengatas. Total sebanyak 128 ekor Sapi Simmental dan Limousine dengan kisaran umur 6-18 bulan, dengan perbandingan 26 ekor jantan Simmental, 50 ekor betina Simmental, 19 ekor jantan Limousine, dan 33 ekor betina Limousine digunakan pada penelitian ini. Metode analisis data dengan regresi linier berganda. Penelitian ini menunjukkan bahwa pendugaan bobot hidup dengan menggunakan ukuran linier tubuh pada sapi Simmental dan Limousine pada fase pedet lepas sapih menghasilkan persamaan Y = -401,98 + 0,96(PB) + 2,71(LD) + 1,15(TP) dengan nilai koefisien determinasi (R2) sebesar 90,91% dan nilai standar error 13,07kg. Secara keseluruhan hasil pendugaan tidak berbeda nyata dengan bobot aktualnya., Live weight estimation in a cow can make it easier to know the actual weight. One way of estimating it is by using the linear size of the cow's body. The aim of this study was to estimate live weight based on body linear measurements of Simmental and Limousine weaning calves. The study used secondary data obtained from the Center for Superior Cattle Breeding and Forage Animal Feed Padang Atas. A total of 128 Simmental and Limousine cattle with an age range of 6-18 months, with a comparison of 26 Simmental males, 50 Simmental females, 19 Limousine males, and 33 Limousine females were used in this study. Method of data analysis with multiple linear regression. This study showed that the estimation of live weight using linear body measurements in Simmental and Limousine cattle in the weaning calf phase resulted in the equation Y = -401.98 + 0.96(PB) + 2.71(LD) + 1.15(TP). Result equation with a coefficient of determination (R2) of 90.91% and a standard error of 13.07kg. Overall, the estimation results are not significantly different from the actual weights.
Keyword: body linear, live weight, regression, body linear, live weight, 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