1,721,027 research outputs found
Heritage buildings management: the role of situational awareness and cyber-physical systems
Full text linkPatterns for visual management in industry 4.0
No full textThe technologies of Industry 4.0 provide an opportunity to improve the effectiveness of Visual Management in manufacturing. The opportunity of improvement is twofold. From one side, Visual Management theory and practice can inspire the design of new software tools suitable for Industry 4.0; on the other side, the technology of Industry 4.0 can be used to increase the effectiveness of visual software tools. The paper first explores how the theoretical result on Visual Management can be used as a guideline to improve human‐computer interaction, then a methodology is proposed for the design of visual patterns for manufacturing. Four visual patterns are presented that contribute to the solution of problems frequently encountered in discrete manufacturing industries; these patterns help to solve planning and control problems thus providing support to various management functions. Positive implications of this research concern people engagement and empowerment as well as improved problem solving, decision‐making and management of manufacturing processes
Optimization of a device for a fumigation process
No full textAn equipment was designed and realized that has allowed to perform the fumigating process optimization for the foodstuff. The equipment, easy to use, allow to exhaust completely the Magnesium of alluminium phosphide pellets and to reduce the phosphine production time from 5 days to 2 days. In addition it is particularly convenient during the fumigazion in cold periods
Proactive Contract Management through RSF Specification
No full textThe modeling and automation of e-contracts is an active
research area that aims at providing a valid support to organizations for
the definition and management of contractual relations. The approach
adopted in this paper allows the modelling and monitoring of contracts
specified in terms of RSF (Requirement Specification Formalism) rules.
Starting from the planning of events relied to contract clauses established
during the negotiation phase, we define a set of RSF rules that can be
used as patterns for the monitoring of both: contract fulfillments and
contract violations with respect to obligations, permissions and prohi-
bitions. We also extend the semantics of the RSF language in order to
allow the treatment of planned events, together with occurred and not
occurred events, in a single transition rule. This enriched semantics sup-
ports the proactive behaviour of a contract management system enabling
the immediate notification of fulfillments and non-compliances as well as
the detection of imminent contract violations
Optimization of a device for the fumigation process
No full textIt has been optimized a device that performs the dried agricultural products disinfestation by fumigation process with phosphine gas. Moreover, it allows to completely exhaust the active principle contained in the pellets of magnesium and aluminium phosphide used in the fumigation process, and to complete the phosphine production process, ordinarily of 5 days, in 2 days.
Further, the device results particularly convenient during the fumigation process performed in cold periods; in facts, it is equipped with a pellets heating device that improves the phosphine production. Further it allows the continuous remixing of the pellets during the fumigation process and the control of the humidity by mean of water injection. The prototype is composed of :
- cylindrical tray in stainless steel, containing the pellets of magnesium and aluminium phosphide, and it is connected to an electrical heater with a thermostatic device for the tray temperature control;
- electric engine for the rotation of the cylindrical tray;
- two bars that sustain 5 harmonic steel sheets with the extremity folded up downward with an angle of 90°. Such sheets, thanks to their elasticity, follow the fund of the tray. Besides they are of different length, so that they allow a good remixing. By mean ANSYS code it has been possible also to evaluate the goodness of the performed remixing.
- a water sprinkler connected to an electrical valve that performs the environmental hygrometric control. In such way the value of the environmental humidity is kept optimal to have the maximum phosphine production and therefore the considered process results very fast.
In the definition of the device geometries it has been used a 3D CAD program: Solid Works. It has allowed to define a parametric model of the considered device. Some experimental tests have been performed to determine the amount of water flow to obtain the optimal humidity value and to avoid dangers of fires caused by the pellets, sprinkling a water quantity ranged from 1/40 to 10 ml for every 1⁄4 of round of the cylindrical tray.
Moreover some tests have been performed to determine the optimal heating temperature considering 4 different temperatures: 30, 40, 50, 60 °C, and evaluating the phosphine quantity produced in such conditions. Besides the process of remixing has been optimized, performed by the steel sheets opportunely shaped. All of this has allowed to completely exhaust the magnesium and aluminium phosphide contained in the inlet pellet
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Determination of nicotine in the soil mixed with tobacco powder as fertilizer
No full textThe nicotine content of the tobacco powder completely degrades in one week when it is added to a non manured soil. If some organic manure is added to the soil so as to sensibly increase the microbial flora, then nicotine degrades in less than twenty-four hours. In sterilized soil nicotine content is constant over the time because of the total absence of microorganism. In the determination of the nicotine in the soil, accurate analytical results can be obtained by adding methanol to the soil sample at the moment of the sampling. Methanol degrades the enzymatic systems causing a soil sterilization and avoids, therefore, the degradation of the alkaloid. The extracted nicotine is analyzed by means of high performance liquid chromatography in a rapid and accurate manner
- …
