Non-Markovianity of local dephasing channels and time-invariant discord

We study non-Markovianity and information flow for qubits experiencing local dephasing with an Ohmic class spectrum. We demonstrate the existence of a temperature-dependent critical value of the Ohmicity parameter s for the onset of non-Markovianity and give a physical interpretation of this phenomenon by linking it to the form of the reservoir spectrum. We demonstrate that this link holds also for more general spectra. We unveil a class of initial states for which discord is forever frozen at a positive value. We connect time invariant discord to non-Markovianity and propose a physical system in which it could be observed

Penggunaan Beberapa Sumber Dan Dosis Aktivator Organik Untuk Meningkatkan Laju Dekomposisi Kompos Tandan Kosong Kelapa Sawit

This research aim to determine the effect of several source and dosage of organic activators ondecomposition rate of empty fruit bunch. This study used a factorial randomized block design (RBD)consist of two factors and three replications. The first factor was the source of organic activatorsconsist of three treatments (chicken manure, cow manure, goat manure) and the second factor wasthe dosage of activator consist of 4 treatments (0, 15, 30 and 45% (w/w)). The results showed thatthe best organic activator in decreasing C/N ratio of compost was chicken manure, withdecomposition rate 10,77 unit/week. The best dosage activator in decreasing C/N ratio of compostwas 45% (w/w), with decomposition rate 17,51 unit/week. Increasing dosage of activator increasedthe decomposition rate, except for chicken manure. The best dosage of chicken manure to increasedecomposition rate of EFB was 30% (w/w)

The Impact of Compost Dose and SP36 Fertilizer Application on Soil Chemical Properties and Growth of Corn Plants (Zea mays L.) in Ultisol Soils

Ultisol soil has complex problems that result in low nutrient availability, especially P. This research aim was to determine the effect of the application of a mixture of compost and SP 36 fertilizer to increase the growth of corn plants on Ultisol soil. The research was conducted from October 17, 2017, to March 13, 2018. This research was conducted in the village of Aek Goti, Silangkit District, Labuhan Batu Selatan Regency, Sumatera Utara Province. The experimental method used was factorial Randomized Block Design (RBD) with 2 factors and 3 replications. The first factor was a dose of compost in the form of Tithonia diversifolia and chicken manure with 4 levels of treatments (B0 : 0 ton/ha, B1: 10 tons/ha, B2: 20 tons/ha, B3: 30 tons/ha). Factor II was the dose of SP36 fertilizer with 3 treatments levels (P0: Control, P1: 100 kg SP36/ha, P2: 200 kg SP36/ha). The parameters observed were pH H2O, P Potential, Soil CEC, root dry weight (g), canopy dry weight (g) of corn (Zea mays L.). The results showed that the application of a mixture of compost Tithonia diversifolia and chicken manure at the rate of 30 tons/ha significantly increased pH H2O, P Potential, CEC, canopy dry weight, and root dry weight

Evaluasi Sifat Biologi Tanah Tanaman Kopi Arabika (Coffea Arabica L.) Pada Beberapa Kecamatan Di Kabupaten Mandailing Natal

Kopi merupakan salah satu komoditas pertanian yang mempunyai nilai ekonomi cukup tinggi. Daerah Mandailing Natal merupakan salah satu daerah penghasil kopi di Indonesia. Penelitian ini bertujuan untuk mengevaluasi sifat biologi tanah antara lain C-organik, N-total, respirasi tanah dan total mikroorganisme tanah terhadap produksi kopi. Penelitian ini dilakukan metode survei. Sampel diambil dengan metode acak sengaja berdasarkan produksi dengan parameter yang diukur yaitu C-organik, N-total, respirasi tanah dan total mikroorganisme tanah. Data dianalisis dengan metode analisis komponen utama. Hasil penelitian menunjukkan bahwa sifat biologi tanah terbagi atas dua faktor, yaitu faktor “Nitrogen dan Mikroorganisme” dan faktor “Bahan Organik”. Baik faktor “Nitrogen dan Mikroorganisme” maupun faktor “Bahan Organik” mempengaruhi produksi secara positif

Campuran Tulang Sapi Dengan Asam Organik Untuk Meningkatkan PTersedia Dan Pertumbuhan Tanaman Jagung Di Inceptisol

The research aimed to determine the effect of a mixture of cow bone ash with organic acids on Pavailable inceptisol soil and growth of maize (Zea mays L.). The research was conducted in thegreenhouse and analyzed in the laboratory of research and technology of Agriculture Faculty ofNorth Sumatera University of Medan from May-October 2013. The research design was nonfactorialrandomized block design consisting of 13 treatments with 3 replications that is: Control,T1K (cow bone ash 166.7 g), T1S1 (cow bone ash 166.7 g + citric acid 2% 500.1 mL), T1A1 (cowbone ash 166.7 g + acetic acid 2% 500.1 mL), T1L1 (cow bone ash 166.7 g + lactic acid 2%500.1mL), T2K (cow bone ash 333.4 g), T2S2 (cow bone ash 333.4 g + citric acid 2% 1000.2 mL),T2A2 (cow bone ash 333.4 g + acetic acid 2% 1000.2 mL), T2L2 (cow bone ash 333.4 g + lactic acid2% 1000.2 mL), T3K (cow bone ash 500.1 g), T3S3 (cow bone ash 500.1 g + citric acid 2% 1500.3mL), T3A3 (cow bone ash 500.1 g + acetic acid 2% 1500.3 mL), dan T3L3 (cow bone ash 500.1 g +lactic acid 2% 1500.3 mL).The result of research indicated that application of 500.1 g cow bone ash+ citric 1000.2 mL citric acid 2% was the highest increasing soil pH (6.78), P available (20 ppm),P-uptake of plants (0.26 g P/plant), plant shoot dry weight (51.66 g), plant root dry weight (14.23),and plant height (187.27 cm) compared with other treatments