Automorphisms and periods of cubic fourfolds

We classify the symplectic automorphism groups for cubic fourfolds. The main inputs are the global Torelli theorem for cubic fourfolds and the classification of the fixed-point sublattices of the Leech lattice. Among the highlights of our results, we note that there are 34 possible groups of symplectic automorphisms, with 6 maximal cases. The six maximal cases correspond to 8 non-isomorphic, and isolated in moduli, cubic fourfolds; six of them previously identified by other authors. Finally, the Fermat cubic fourfold has the largest possible order (174,960) for the automorphism group (non-necessarily symplectic) among all smooth cubic fourfolds

CONSIDERATIONS ON THE TECHNOLOGIES FOR SEPARATING FRUIT SEEDS WITH APPLICATIONS ON THE SEPARATION OF SEABUCKTHORN PULP FROM SEEDS

Sea-buckthorn is a shrub fruit whose benefits have been known since antiquity. The whole plant is considered medicinal by specialists in the field, but the most active part is the sea-buckthorn fruit because it has a beneficial effect on the entire human body and more recently on animal breeding. A high-value by-product is sea-buckthorn oil, which is currently gaining traders’ attention at international level and which is obtained from both fruit and pomace resulting from the extraction of juice (shells and seeds). This paper presents some representative technolo-gies and installations used for fruit processing in general, technologies that will be the basis for the realization by INMA Bucharest of a technical equipment for separating sea-buckthorn pulp from the seeds

Constructing deliberative agents with case-based reasoning technology

This article shows how autonomous agents may be constructed with the help of case-based reasoning (CBR) systems. The advantages and disadvantages of deliberative agents are discussed, and it is shown how to solve some of their inconveniences, especially those related to their implementation and adaptation. The Internet is one of the most popular vehicles for disseminating and sharing information through computer networks and it is influencing the business world. An agent-based solution is presented to show how the proposed technology may facilitate and improve an e-business strategy. © 2003 Wiley Periodicals, Inc

Creation of deliberative agents using a CBR model.

This paper shows how to build deliberative agents, with learning capacity, using a Case-based Reasoning model. The concept of deliberative agent is introduced and the Case-based Reasoning model is presented. Once the advantages and disadvantages of such agents have been discussed, it is shown how to solve some of their problems, especially those related to their implementation and adaptation using a Casebased Reasoning System

An autonomous agent based engineering sales support system.

The Internet has emerged as one of the most popular vehicle for disseminating and sharing information through computer networks. A distributed agent-based solution for e-businesses is presented and evaluated in this paper. The system has been developed to help the salesmen, of a construction firm, in their jobs. This business system has a high degree of autonomy, which has been achieved by the use of deliberative agents. A special type of agents has been developed for this particular system. Such agents use a case-base reasoning system to generate their action plans. These agents can be easily constructed from numerical specifications and have the ability of reasoning and adapting to the environmental changes without human supervision. The paper describes in detail both the multiagent based system and the deliberative agents used in it

Poly(styrene-co-vinylbenzylchloride-co-divinylbenzene) coated iron oxide: Synthesis and effects on size and morphology

Iron oxide nanoparticles were coated with a polymer synthesized from the monomers of styrene, divinylbenzene, and vinylbenzylchloride. The resultant polymer microspheres from synthesis without nanoparticle loading are primarily monodispersed with a diameter of 3.45 μm as measured by scanning electron microscopy. The addition of 1% nanoparticles by mass appears to decrease the size of the microspheres down to 2.04 μm as well as increase the polydispersity. This trend is also seen to continue as you add more nanoparticles to the system going from 3.45 μm with 0% nanoparticles down to below 1 μm for 5% nanoparticles. This indicates that the particles are not just incorporated into the polymer matrix but act as nucleation sites to begin the polymerization process. The polymerization process was found to have no effect on the nanoparticles themselves as the magnetic characterization showed only a mass dilution in saturation when corrected by thermal gravimetric analysis

Improving the revision stage of a CBR system with belief revision techniques.

This paper presents a method for automating the revise phase of case-based reasoning systems. The revision is carried out using a rule -based system, which adapts its rules or knowledge base as the working environment, to which the system is applied, evolves in time. This actualisation is carried out by a belief revision technique. An example has been introduced to illustrate the working mode of the revision techniqu

Giant cell granuloma of the maxilla: global management, review of literature and case report

Giant cell granuloma is a relatively rare benign entity but can be locally aggressive. Histologically characterized by intense proliferation of multinucleated giant cells and fibroblasts. Affects bone supported tissues. Definitive diagnosis is given by biopsy. Clinically manifest as a mass or nodule of reddish color and fleshy, occasionally ulcerated surface. They can range from asymptomatic to destructive lesions that grow quickly. It is a lesion to be considered in the differential diagnosis of osteolytic lesions affecting the maxilla or jaw. Its management passed from conservative treatment with intralesional infiltration of corticosteroids, calcitonin or interferon, to the surgical resection and reconstruction, for example with microvascular free flaps. Keywords: giant cell granuloma, intralesional injection, microvascular free flap, fibula

Compactifications of the moduli space of plane quartics and two lines

We study the moduli space of triples (C,L₁,L₂) consisting of quartic curves C and lines L₁ and L₂. Specifically, we construct and compactify the moduli space in two ways: via geometric invariant theory (GIT) and by using the period map of certain lattice polarized K3 surfaces. The GIT construction depends on two parameters t₁ and t₂ which correspond to the choice of a linearization. For t₁=t₂=1 we describe the GIT moduli explicitly and relate it to the construction via K3 surfaces