A set D of vertices of a graph G = (V, E) is called k-dominating if every vertex v ∈V-D is adjacent to some k vertices of D. The k-domination number of a graph G, γk (G), is the order of a smallest k-dominating set ...A set D of vertices of a graph G = (V, E) is called k-dominating if every vertex v ∈V-D is adjacent to some k vertices of D. The k-domination number of a graph G, γk (G), is the order of a smallest k-dominating set of G. In this paper we calculate the k-domination number (for k = 2) of the product of two paths Pm × Pn for m = 1, 2, 3, 4, 5 and arbitrary n. These results were shown an error in the paper [1].展开更多
A large amount of palm oil mill effluent is one of the issues faced by palm oil producers in Indonesia. To alleviate the environmental pollution, it is necessary to reduce the problem by using it as a liquid organic f...A large amount of palm oil mill effluent is one of the issues faced by palm oil producers in Indonesia. To alleviate the environmental pollution, it is necessary to reduce the problem by using it as a liquid organic fertilizer. A pot experiment to determine the effects of mill effluent on growth of palm oil seedlings （Elaeis guineensis Jacq.）, availability and uptake of macronutrients was conducted in Tandun Plantation Unit, province of Riau, Indonesia. The experiment used a randomized block design, consisting nine combinations of mill effluent doses （3.2, 6.4 and 9.6 L） and recommended fertilizer doses （100%, 75%, 50% NPKMg） in 20 kg soil and one control. The experiment was replicated three times. The results showed that plant height, stem diameter and number of fronds of palm oil seedlings at 26 weeks after planting （WAP） were significantly affected by application of 9.6 L mill effluent with 50%-75% NPKMg, The enhancement of soil organic C （Co,g） content, soil pH and cation exchange capacity due to the application of 9.6 L mill effluent combined with 50% NPKMg caused the availability of soil P and total N （Ntot） increased significantly, while exchangeable K was affected by application of 6.4 L mill effluent combined with 100% NPKMg. All treatments did not affect soil exchangeable Mg. A positive correlation between availability of soil N, P, K and its uptake by palm oil seedlings at 26 WAP were indicated by r = 0.61, 0.63 and 0.57, respectively.展开更多
Purpose: To evaluate the topographic concordance between sensibility values of short wave automated perimetry (SWAP) and frequency doubling technology (FDT) in ocular hypertension. Methods: 22 eyes of 22 patients diag...Purpose: To evaluate the topographic concordance between sensibility values of short wave automated perimetry (SWAP) and frequency doubling technology (FDT) in ocular hypertension. Methods: 22 eyes of 22 patients diagnosed of ocular hypertension underwent SWAP (24-2 test, Humphrey analyser) and FDT (C-20 threshold test). According the 17 points examined展开更多
文摘A set D of vertices of a graph G = (V, E) is called k-dominating if every vertex v ∈V-D is adjacent to some k vertices of D. The k-domination number of a graph G, γk (G), is the order of a smallest k-dominating set of G. In this paper we calculate the k-domination number (for k = 2) of the product of two paths Pm × Pn for m = 1, 2, 3, 4, 5 and arbitrary n. These results were shown an error in the paper [1].
文摘A large amount of palm oil mill effluent is one of the issues faced by palm oil producers in Indonesia. To alleviate the environmental pollution, it is necessary to reduce the problem by using it as a liquid organic fertilizer. A pot experiment to determine the effects of mill effluent on growth of palm oil seedlings （Elaeis guineensis Jacq.）, availability and uptake of macronutrients was conducted in Tandun Plantation Unit, province of Riau, Indonesia. The experiment used a randomized block design, consisting nine combinations of mill effluent doses （3.2, 6.4 and 9.6 L） and recommended fertilizer doses （100%, 75%, 50% NPKMg） in 20 kg soil and one control. The experiment was replicated three times. The results showed that plant height, stem diameter and number of fronds of palm oil seedlings at 26 weeks after planting （WAP） were significantly affected by application of 9.6 L mill effluent with 50%-75% NPKMg, The enhancement of soil organic C （Co,g） content, soil pH and cation exchange capacity due to the application of 9.6 L mill effluent combined with 50% NPKMg caused the availability of soil P and total N （Ntot） increased significantly, while exchangeable K was affected by application of 6.4 L mill effluent combined with 100% NPKMg. All treatments did not affect soil exchangeable Mg. A positive correlation between availability of soil N, P, K and its uptake by palm oil seedlings at 26 WAP were indicated by r = 0.61, 0.63 and 0.57, respectively.
文摘Purpose: To evaluate the topographic concordance between sensibility values of short wave automated perimetry (SWAP) and frequency doubling technology (FDT) in ocular hypertension. Methods: 22 eyes of 22 patients diagnosed of ocular hypertension underwent SWAP (24-2 test, Humphrey analyser) and FDT (C-20 threshold test). According the 17 points examined
