Trapping a particle of a quantum walk on the line

We observe that changing a phase at a single point in a discrete quantum walk results in a rather surprising localization effect. For certain values of this phase change the possibility of localization strongly depends on the internal coin-state of the walker.Comment: 5 pages, 4 figure

Unmodulated spin chains as universal quantum wires

We study a quantum state transfer between two qubits interacting with the ends of a quantum wire consisting of linearly arranged spins coupled by an excitation conserving, time-independent Hamiltonian. We show that if we control the coupling between the source and the destination qubits and the ends of the wire, the evolution of the system can lead to an almost perfect transfer even in the case in which all nearest-neighbour couplings between the internal spins of the wire are equal.Comment: 4 pages, 5 figure

Influence of sky radiance distribution on soil image in the optical domain

W niniejszej pracy przedstawiona jest funkcja opisująca rozkład radiacji nieba, wykorzystywana w hemisferyczno-kierunkowym modelu odbicia od powierzchni gleby, umożliwiającym przewidywanie obrazu gleby o zdefiniowanym kształcie powierzchni, pokrywającej dowolnie zorientowany stok, oświetlonej światłem widzialnym i podczerwonym oraz obserwowanej z jakiegoś kierunku przez sensor zawieszony nad nią. Naziemne pomiary kierunkowego odbicia od powierzchni gleb uprawnych, zgromadzone w pobliżu jednej ze stacji sieci AERONET w Sede Boker w Izraelu, pozwoliły na odpowiednio wiarygodne przeanalizowanie wpływu światła dyfuzyjnego nieba na obraz gleb uprawnych nie pokrytych roślinnością. Posłużono się przykładem dwóch bardzo podobnych powierzchni glebowych zbudowanych z tego samego materiału glebowego, z agregatami glebowymi rozrzuconymi losowo i rozłożonymi kierunkowo w postaci mikroreliefu bruzdowego. Analizowano możliwość ich odróżnienia w różnych warunkach oświetlenia

Wirtualne powierzchnie do przewidywania obrazu gleb w zmieniających się warunkach oświetlenia i obserwacji ich powierzchni

W niniejszej pracy przedstawiono syntetyczne powierzchnie, symulujące geometrię powierzchni gleb, za pośrednictwem których, przy udziale nowego modelu, generowane są rozkłady hemisferyczno-kierunkowego odbicia od gleb uprawnych i nie uprawnych w zakresie optycznym. Model ten zakłada, że powierzchnie glebowe oświetlane są przez hemisferyczne źródło światła, o rozkładzie energii obliczanej funkcją empiryczną. Efekty widzenia wirtualnych powierzchni zależą od ich oświetlenia przez hemisferyczne źródło światła, jak i od właściwości odbiciowych rozważanych powierzchni. Odbicie to ma charakter niby lambertowski. Poprawność przewidywania obrazu gleb w zmieniających się warunkach oświetlenia i ich obserwacji przeanalizowano na przykładzie gleb o różnej szorstkości

Lupins (L. Luterus, L. Albus. L. Angustifolius) as a protein source for young pigs.

The nitrogen balance and growth performance of piglets (12-14 kg initial body weight) were measured to evaluate the nutritive value of meal from Lupinus luteus cultivars 'Amulet' and 'Cybis', Lupinus albus cultivar 'Hetman," Lupinus angustifolius cultivar 'Saturn' and a commercial batch of lupin seeds from Australia (ALS). The inclusion level of lupin seed meal in the barley-based diets ranged from 310 to 410 g kg-1 to provide 120 g of crude protein from each lupin species per kilogram of diet. The average apparent total tract digestibility of dry matter (0.91) and crude protein (0.90) in L. luteus diets was as high as in the control (soybean) diet. The lowest (P < 0.05) digestibility of dry matter (0.86) and crude protein (0.83) was found for the diet containing seed meal from L. albus. Utilization of the apparently digested nitrogen (nitrogen retained as a proportion of nitrogen digested) was highest in the soybean group and both groups with L. angustifolius ('Saturn' and ALS) with values of 0.71, 0.72 and 0.71, respectively. Intermediate values were found for L. luteus ('Amulet', 0.68; 'Cybis', 0.68) and the lowest (0.55) for the L. albus group. The growth performance of pigs given diets with seeds of L. luteus and L. angustifolius was not different from that of pigs given the soybean diet, but pigs given the L. albus diet had a higher (P < 0.05) feed conversion ratio. It was concluded that L. albus cultivar 'Hetman' was less suitable than other varieties as a source of supplementary protein for young growing pigs when included in the diet at the level of 37 g kg-1. Seeds of L. luteus cultivar 'Cybis' and both cultivars of L. angustifolius were used at levels of up to 41 g kg-1 in diets without depression of growth performance as compared with soybean diet

Effect of Australian sweet lupin (Lupinus angustifolius L.) inclusion levels and enzyme supplementation on the performance, carcass composition and meat quality of grower/finisher pigs

Two hundred and twenty-four crossbred male pigs (Large White × Landrace, initial bodyweight 27.2 kg ± 0.22) were used to determine the influence of dietary Australian sweet lupin (ASL) inclusion level and enzyme supplementation on growth performance, carcass composition and meat quality. The experiment was a 4 × 2 factorial design with the respective factors being ASL inclusion level (Lupinus angustifolius L., cv. Mandelup; 200, 250, 300 and 350 g/kg, in replacement of soybean meal) and enzyme supplementation (without or with supplemental enzyme; Allzyme SSF). Pigs (7 pigs per pen × 4 replicates per treatment = 28 pigs per enzyme by lupin-level combination) were fed grower diets between 27 and 50 kg, finisher diets between 50 and 75 kg and pre-sale diets between 75 and 107 kg, and daily gain and feed intake were measured weekly. At ~107 kg liveweight, the pigs were slaughtered at a commercial abattoir and carcass composition was measured. Meat quality (pH, surface exudate, drip loss, cooking loss, meat colour and shear force) was measured from selected pigs (n = 18) fed the lowest and highest lupin diets without enzyme supplementation. Increasing the ASL inclusion level to 350 g/kg did not alter (P \u3e 0.05) growth performance of pigs and did not influence (P \u3e 0.05) carcass composition and meat quality. Likewise, addition of supplemental enzyme had no effect (P \u3e 0.05) on growth performance and carcass composition. Lack of performance response to added enzyme complex is likely due either to the use of enzyme complex that was not substrate-specific for the lupin non-starch polysaccharides or to the high specification of the experimental diets, which was inevitable when increasing inclusion levels of lupins. The results show that a current variety (Mandelup) of ASL can be used in grower/finisher diets up to 350 g/kg without compromising growth, carcass composition or meat quality of pigs