Tra epigrafia e papirologia Q. Baienus Blassianus, cavaliere tergestino e prefetto d’Egitto

2nonemixedZaccaria C.; Mainardis F.Zaccaria, Claudio; Mainardis, Fulvi

Computing the dimension of the Majorana representation of the Harada-Norton Group

In this note we apply the theory of Association Schemes to com- pute the dimension of the subspace U of the 196,884-dimensional Conway- Norton-Griess algebra generated by the Majorana axes associated to the 2A- involutions of the Monster group that are contained in the Harada-Norton group

Energy and material recovery from high-loaded organic substrates: A territory-oriented approach

This Ph.D. research was aimed at liquid organic substrates valorisation, by means of energy and material recovery. The mountain area of Friuli-Venezia Giulia region was selected as case-study: Cheese Whey (CW), condensate Pulp and Paper (P&P) WW, OFMSW, brewery waste (spent grain, yeast, whirlpool residue, end-of-fermentation beer) and slaughterhouse waste were selected for AD process application, as well as for resource recovery. The work started with a literature study, followed by physicochemical characterization, BMP tests, continuous UASB tests, and it was then completed with an energetic analysis, as well as with some final remarks and suggestions. The Ph.D. thesis starts with a general introduction, aimed at describing EU perspective in renewable energy and waste management. Given the increasing importance of biomethane, the currently applied technologies for biogas upgrading are briefly discussed, as well. Then, UASB anaerobic treatment, as an interesting process for energy recovery from industrial wastewater, and Tolmezzo WWTP (143,000 PE) are described. Successively, the analysed substrates are introduced, and the obtained results are presented. The results from BMP tests follow: these data were useful to estimate potential methane yields and maximum methane fluxes, as well as to introduce continuous UASB tests, that were conducted on a pilot-UASB unit. In the final chapter, some energetic and material recovery considerations are drawn, considering the actual energetic costs in selected real plants and suggesting, for each substrate, an optimization route. The results underlined that a high potential is present for biogas production in dairies: CW can be successfully digested, and, if performed at plant level, AD process can provide most of the electricity and heat needed by the process. The installation of simple digesters can allow to reduce pay-back time. In larger dairies, instead, resource recovery should be privileged, due to the extra income that could be provided by the obtained products. Ultrasound (US) pre-treatment was shown to be effective in increasing biogas yields, but only at low applied US energy. OFMSW can be separated into a liquid fraction, highly biodegradable and having good methane potential, and a solid fraction, easily stabilized through composting. Given the general low amount of available organic waste in the analysed territory, co-digestion of OFMSW liquid fraction with other substrates, such as excess sewage sludge, can be an interesting option, to increase biogas yields and obtain a co-digestion mixture having optimum characteristics. Condensate water is a highly concentrated P&P WW, and is amenable to be pre-treated using UASB technology; this can reduce organic load to the aerobic basins, leading to a significant energy saving for aeration. Brewery organic waste is characterized by a pool of different substrates, including spent grain (trub), yeast, whirlpool residue and end-of-fermentation beer. A good potential for biogas production was shown to be present mainly in spent grain and yeast. The addition of little amounts of biochar and granular activated carbon increased obtainable methane yields in a significant way (more than 35%), so a synergistic effect between biomass plants and processing plants can be achieved, improving energy production. Co-digestion of brewery organic substrates at plant level can be successfully performed. Given the high energy demand of this plants, AD process appears to be a good solution to reduce operating costs. Slaughterhouse waste, finally, is a harsh substrate, difficult to hydrolyse, and rich of proteins and fats: in order to be successfully treated using AD process, efficient pre-treatments should be investigated. Moreover, sanitary protocols must be followed, for its proper management. It could be interesting to evaluate the effects of co-digestion with complementary substrates, rich in C

Fusion systems on a Sylow 3-subgroup of the McLaughlin group

We determine all saturated fusion systems \u2131 on a Sylow 3-subgroup of the sporadic McLaughlin group that do not contain any non-trivial normal 3-subgroup and show that they are all realizable

2-generated axial algebras of Monster type (2β,β)

Axial algebras of Monster type (α,β) are a class of non- associative algebras that includes, besides associative algebras, other important examples such as the Jordan algebras and the Griess algebra. 2-generated primitive axial algebras of Monster type (α,β) naturally split into three cases: the case when α ∈/ {2β, 4β}, the case α = 4β and α = 2β. In this paper we give a complete classification all 2-generated primitive axial algebras of Monster type (2β,β)

I pagani meteienses di CIL V 42*: La possibile riabilitazione di un "falso asquiniano"

Il contributo prende in esame un’iscrizione perduta ma segnalata nel XVIII secolo nella villa Michieli di Campolongo al Torre (Udine, Italia), una località non molto distante da Aquileia. Mommsen tuttavia schedò il testo tra le iscrizioni false di CIL V. Le ragioni di questo destino risiedono nella cattiva fama (come falsario) del conte Girolamo Asquini (1762-1837) e nel nome degli autori della dedica, i pagani Meteienses. Il toponimo Meteia da cui deriverebbe l’odierno Medea sarebbe per Asquini e per altri prova sicura dell’arrivo degli Argonauti in regione. In realtà le modalità di trasmissione dell’iscrizione, l’analisi linguistica del toponimo e elementi interni del testo epigrafico farebbero propendere per la genuinità della dedica

Permutation modules for the symmetric group

In this paper we present a general method for computing the irreducible components of the permutation modules of the symmetric groups over a field $F$ of characteristic 0. We apply this machinery to determine the decomposition into irreducible submodules of the $F[S_n]$-permutation module on the right cosets of the normaliser in $S_n$ of the subgroup generated by a permutation of type $(3,3)$

Up-Flow Anaerobic Sludge Blanket (UASB) Technology for Energy Recovery: A Review on State-of-the-Art and Recent Technological Advances

Up-flow anaerobic sludge blanket (UASB) reactor belongs to high-rate systems, able to perform anaerobic reaction at reduced hydraulic retention time, if compared to traditional digesters. In this review, the most recent advances in UASB reactor applications are critically summarized and discussed, with outline on the most critical aspects for further possible future developments. Beside traditional anaerobic treatment of soluble and biodegradable substrates, research is actually focusing on the treatment of refractory and slowly degradable matrices, thanks to an improved understanding of microbial community composition and reactor hydrodynamics, together with utilization of powerful modeling tools. Innovative approaches include the use of UASB reactor for nitrogen removal, as well as for hydrogen and volatile fatty acid production. Co-digestion of complementary substrates available in the same territory is being extensively studied to increase biogas yield and provide smooth continuous operations in a circular economy perspective. Particular importance is being given to decentralized treatment, able to provide electricity and heat to local users with possible integration with other renewable energies. Proper pre-treatment application increases biogas yield, while a successive post-treatment is needed to meet required effluent standards, also from a toxicological perspective. An increased full-scale application of UASB technology is desirable to achieve circular economy and sustainability scopes, with efficient biogas exploitation, fulfilling renewable energy targets and green-house gases emission reduction, in particular in tropical countries, where limited reactor heating is required