Judul: Pengaruh Naungan Paranet terhadap Iklim Mikro dan Produktivitas Pucuk Tanaman Kolesom (Talinum triangulare (Jacq.)Willd.)
Abstrak: Water-leaf (Talinum triangulare (Jacq).Willd.) is one of medicinal plant which has many benefits. Part of the plant organ which often utilized is the shoot. This research, which was conducted using factor analysis of fixed model, aimed analyze the effect of paranet shading on micro climet and productivity of water-leaf’s shoot. The results showed that paranet shading had profound effects on radiation and temperature, and on growth and productivity of water-leaf. Shading using paranet 50% could reduced radiation transmission by 27%, reduced temperature by 0.3ᵒC, and reduced shoot productivity by 17%; while using paranet 75% could reduced radiation transmission by 36% and reduced temperature by 0.6ᵒC, and reduced shoot productivity by 59%, respectively.
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Judul: Intersepsi Radiasi Matahari dan Pertumbuhan Tanaman Cabai Merah pada Kondisi Tanpa Naungan dan Ternaungi
Abstrak: Applications of shading modifes the amount of radiation reaching the plants. This study was aimed to determine the influence of shading by paranet 50% and 75% on leaf area index (LAI), solar radiation use efficiency (RUE) and production of red pepper. For the duration of filed experiment of 127 days, total global radiation above the plant canopy in open areas was 1778 MJ/m², above the plant canopy in the shading by paranet 50% was 1629 MJ/m² and above the plant canopy in the shading by 75% was 1364 MJ/m². In plants without shading, the maximum value of LAI was 3.18 and the minimum was 0.75, while the maximum RUE was 2.8 g/MJ and minimum RUE was 1.5 g / MJ. In shading by paranet 50%, the maximum LAI was 2.75 and minimum LAI was 0.64, maximum RUE was 2.7 g/MJ and minimum RUE was 1.4 g/MJ. In plants with shading by paranet 75%, the maximum value of LAI was 2.58 and the minimum was 0.60, while the maximum RUE was 2.6 g/MJ and minimum RUE was 1.3 g/MJ. Plants under shading by paranet 75% only produced 7% of the biomass of plants without shading.
Keyword: red pepper, plant growth, paranet shading, Interception

Judul: Invers Drazin dari Matriks Toeplitz Singular
Abstrak: Matriks Toeplitz adalah matriks yang setiap unsur pada diagonal utama bernilai sama dan setiap unsur pada subdiagonal yang bersesuaian dengan diagonal utama juga bernilai sama. Matriks singular adalah matriks yang tidak bisa ditentukan inversnya. Akan tetapi, dapat diupayakan untuk ditentukan inversnya menggunakan invers matriks yang diperumum. Invers Drazin merupakan salah satu jenis invers matriks yang diperumum. Pada karya ilmiah ini ditentukan invers Drazin dari matriks Toeplitz singular dengan menggunakan metode Leverrier Faddeev. Kemudian, ditentukan invers Drazin dari matriks Toeplitz singular yang direpresentasikan sebagai penjumlahan segitiga bawah dan segitiga atas matriks Toeplitz berdasar pada teorema Gohberg dan Semencul., Toeplitz matrix is a matrix in with element on the main diagonal has the same value and on the subdiagonal corresponding to the main diagonal also has the same value. Singular matrix is a matrix that has no inverse. However, it can be attempted to determine the inverse using a generalized inverse matrix. Inverse Drazin is a type of generalized matrix inverse. This paper discussed the inverse Drazin for a singular Toeplitz matrix using the Leverrier Faddeev method. Then, the Drazin inverse of the singular Toeplitz matrix which is represented as a sum of products of lower and upper triangular Toeplitz matrix based on Gohberg and Semencul theorem.
Keyword: inverse Drazine, singular Toeplitz matrix