The Rank of the Sandpile Group of Random Directed Bipartite Graphs

We identify the asymptotic distribution of $p$-rank of the sandpile group of a random directed bipartite graphs which are not too imbalanced. We show this matches exactly that of the Erd{\"o}s-R{\'e}nyi random directed graph model, suggesting the Sylow $p$-subgroups of this model may also be Cohen-Lenstra distributed. Our work builds on results of Koplewitz who studied $p$-rank distributions for unbalanced random bipartite graphs, and showed that for sufficiently unbalanced graphs, the distribution of $p$-rank differs from the Cohen-Lenstra distribution. Koplewitz [2] conjectured that for random balanced bipartite graphs, the expected value of $p$-rank is $O(1)$ for any $p$. This work proves his conjecture and gives the exact distribution for the subclass of directed graphs.Comment: 9 page

Autonomous Operations Planner: A Flexible Platform for Research in Flight-Deck Support for Airborne Self-Separation

The Autonomous Operations Planner (AOP), developed by NASA, is a flexible and powerful prototype of a flight-deck automation system to support self-separation of aircraft. The AOP incorporates a variety of algorithms to detect and resolve conflicts between the trajectories of its own aircraft and traffic aircraft while meeting route constraints such as required times of arrival and avoiding airspace hazards such as convective weather and restricted airspace. This integrated suite of algorithms provides flight crew support for strategic and tactical conflict resolutions and conflict-free trajectory planning while en route. The AOP has supported an extensive set of experiments covering various conditions and variations on the self-separation concept, yielding insight into the system s design and resolving various challenges encountered in the exploration of the concept. The design of the AOP will enable it to continue to evolve and support experimentation as the self-separation concept is refined

Dunavski rubin - nova indeterminantna sorta paradajza

Dunavski rubin is a medium early indeterminate cultivar with large fruits and average fruit weight of 180 g. It was developed by crossing cultivars Korona and Saint Pierre. Hybrid material was grown by using the pedigree method. Phenotypically uniform line V9 was selected and submitted to the Varietal Release Committee of the Republic of Serbia. Cultivar was released in 2014 by the Decision of Ministry of Agriculture, Forestry and Water Management of the Republic of Serbia under no. 320-04-1871/2/2013-11. Dunavski rubin represents successful combination of genes responsible for high fertility rate and fruit quality. Fruits of Dunavski rubin cultivar have high percentage of dry matter (6.30%), high level of lycopene (106.7 mg/100 g), and excellent total acidity (0.39%). Vitamin C content is 52.7 mg/100 g, while total sugars amount to 5.71%. High K content (1520 mg/kg) and low Na content (79.8 mg/kg) is what distinguishes this cultivar from the others. Comparing with other cultivars trough three year field experiments, it was concluded that Dunavski rubin is a cultivar intended for fresh consumption due to a long fruit-bearing period, but is also an excellent raw material for processing due to its high quality fruit. All of the above mentioned classifies Dunavski rubin as an enhancer in technological processing of tomato.Sorta Dunavski rubin je srednje rana indeterminantna sorta, krupnih plodova, prosečne mase 180 g. Nastala je ukrštanjem sorti Korona i Saint Pierre. Hibridni materijal je uzgajan po pedigre metodi. Fenotipski ujednačena linija V9 je odabrana i prijavljena Komisiji za priznavanje sorti. Sorta je registrovana 2014. godine rešenjem Ministarstva poljoprivrede, šumarstva i vodoprivrede Republike Srbije pod brojem 320-04-1871/2/2013-11. Dunavski rubin predstavlja uspešnu kombinaciju gena odgovornih za visok potencijal rodnosti i visok kvalitet ploda. Plodovi Dunavskog rubina imaju visok procenat suve materije od 6.30, visok nivo likopena od 106.7 mg/100 g i odličnu ukupnu kiselost od 0.39%. Sadržaj vitamina C iznosi 52.70 mg/100 g , dok ukupni šećeri čine 5.71%. Visok sadržaj K od 1520 mg/kg i nizak sadržaj Na od 79.8 mg/kg je ono što ovu sortu izdvaja od drugih. Na osnovu trogodišnjih poljskih ogleda i poređenja sa drugim sortama utvrđeno je da je Dunavski rubin pogodan za svežu potrošnju zbog dugog perioda plodonošenja ali je i odlična sirovina za preradu zbog visokog kvaliteta ploda koji je svrstavaju u red poboljšivača u tehnološkom procesu prerade paradajza

Experimental Performance of a Genetic Algorithm for Airborne Strategic Conflict Resolution

The Autonomous Operations Planner, a research prototype flight-deck decision support tool to enable airborne self-separation, uses a pattern-based genetic algorithm to resolve predicted conflicts between the ownship and traffic aircraft. Conflicts are resolved by modifying the active route within the ownship s flight management system according to a predefined set of maneuver pattern templates. The performance of this pattern-based genetic algorithm was evaluated in the context of batch-mode Monte Carlo simulations running over 3600 flight hours of autonomous aircraft in en-route airspace under conditions ranging from typical current traffic densities to several times that level. Encountering over 8900 conflicts during two simulation experiments, the genetic algorithm was able to resolve all but three conflicts, while maintaining a required time of arrival constraint for most aircraft. Actual elapsed running time for the algorithm was consistent with conflict resolution in real time. The paper presents details of the genetic algorithm s design, along with mathematical models of the algorithm s performance and observations regarding the effectiveness of using complimentary maneuver patterns when multiple resolutions by the same aircraft were required

Method and Apparatus for Providing In-Flight Pilot Interface for Trajectory Optimization

Systems and methods of an in-cockpit flight trajectory modification system for an aircraft are provided. A receiver is capable of receiving flight-related hazard information. A traffic aware planner (TAP) module is operably connected to the receiver to receive the flight-related hazard information. A user interface device is operably connected to the TAP module on board the aircraft to provide trajectory information associated with the aircraft and to receive user input corresponding to a request for a revised trajectory. A TAP application is capable of calculating one or more revised trajectories for the aircraft based at least on active trajectory information of the aircraft and the flight-related hazard information. The user interface device may be configured to display information related to the one or more revised trajectories, including a graphic display of the active trajectory and at least one revised trajectory in a visualization panel of the user interface device

Investigation of asymmetrical shaft power increase during ship maneuvers by means of simulation techniques

Marine propulsion plants can experience large power fluctuations during tight maneuvers, with increases of shaft torque up to and over 100% of the steady values in straight course and considerable asymmetry between internal and external shafts during turning circle. This phenomenon (studied in Viviani et al 2007a and 2007b can be of particular interest for twin screw ships propulsion systems with coupled shaftlines, in which asymmetrical loads can represent a challenge for the whole propulsion system (e.g. unique reduction gear, shaftlines, automation). A joint research has been set up in order to deeply investigate the phenomenon, by means of large scale model testing and related numerical simulations. In the present work, preliminary simulation results with different simplified automation systems and with an automation system more similar to the real one are reported, allowing to get a better insight into this complex problem

A Cooperative Company in Agriculture: Feasibility Analysis of a Start-up Project

Cel – Celem badania jest analiza dynamiki gospodarczej i finansowej spoldzielni rolniczej w fazie początkowej. Metodologia – Badanie rozpoczyna sie od analizy alternatywnych form produktow marketingowych, ktore są niezbedne do określenia pola operacyjnego firmy. Finansowanie przedsiebiorstw spoldzielczych zawsze bylo niezwykle istotną kwestią w zarządzanie tego typu dzialalności. Istotnie, parametry techniczne i prawne tych firm mają ograniczone mozliwości do źrodel finansowania. Oryginalnośc/wartośc – W calej tej pracy, staraliśmy sie zaproponowac instrumenty finansowe, ktore najlepiej odpowiadają na potrzeby spoldzielni rolnej w fazie początkowej

Precise Measurements of Atmospheric Muon Fluxes with the BESS Spectrometer

The vertical absolute fluxes of atmospheric muons and muon charge ratio have been measured precisely at different geomagnetic locations by using the BESS spectrometer. The observations had been performed at sea level (30 m above sea level) in Tsukuba, Japan, and at 360 m above sea level in Lynn Lake, Canada. The vertical cutoff rigidities in Tsukuba (36.2 N, 140.1 E) and in Lynn Lake (56.5 N, 101.0 W) are 11.4 GV and 0.4 GV, respectively. We have obtained vertical fluxes of positive and negative muons in a momentum range from 0.6 to 20 GeV/c with systematic errors less than 3 % in both measurements. By comparing the data collected at two different geomagnetic latitudes, we have seen an effect of cutoff rigidity. The dependence on the atmospheric pressure and temperature, and the solar modulation effect have been also clearly observed. We also clearly observed the decrease of charge ratio of muons at low momentum side with at higher cutoff rigidity region.Comment: 35 pages, 9 figures. Submitted to Astroparticle Physic

Measurement and simulation of the neutron response of the Nordball liquid scintillator array

The response of the liquid scintillator array Nordball to neutrons in the energy range 1.5 < T_n < 10 MeV has been measured by time of flight using a 252Cf fission source. Fission fragments were detected by means of a thin-film plastic scintillator. The measured differential and integral neutron detection efficiencies agree well with predictions of a Monte Carlo simulation of the detector which models geometry accurately and incorporates the measured, non-linear proton light output as a function of energy. The ability of the model to provide systematic corrections to photoneutron cross sections, measured by Nordball at low energy, is tested in a measurement of the two-body deuteron photodisintegration cross section in the range E_gamma=14-18 MeV. After correction the present 2H(gamma,n)p measurements agree well with a published evaluation of the large body of 2H(gamma,p)n data.Comment: 20 pages 10 figures, submitted Nucl. Instr. Meth.