Papers by Giuseppe Aiello
Lecture notes in civil engineering, 2023
Acta horticulturae, Jul 1, 2017
Greenhouse microclimate management (temperature, relative humidity) plays a very important role i... more Greenhouse microclimate management (temperature, relative humidity) plays a very important role in order to optimize the production process improving pest and disease control, irrigation and energy efficiency. The systems mostly used in Sicily (south Italy) to record the ambient parameters are made up of fixed measuring stations able to give useful information about the climate inside the greenhouse limited to some prefixed points. In this study we texted a novel system made up of humidity and temperature data loggers (iButton ®) placed inside a greenhouse. The iButton ® temperature/humidity logger (DS1923) is a rugged, self-sufficient system that measures temperature and/or humidity and records the result in a protected memory section. The DS1923 is configured and communicates with a host-computing device through the serial 1-Wire ® protocol, which requires only a single data lead and a ground return. A total of 8192 8-bit readings or 4096 16-bit readings taken at equidistant intervals ranging from 1 s to 273 hours can be stored. The data loggers reduced dimensions (16.3 mm diameter and 5.9 mm tall) allow to not disturb vegetation in positioning them. In this study, twenty iButton ® loggers were uniformly distributed inside the greenhouse also near to the vegetation and gave the opportunity of accurately control the ambient parameters with great flexibility due to the facility in positioning and moving them. Furthermore, the infrared camera FLIR P640 was used to obtain accurate temperature measurements in correspondence with the vegetation. The iButton ® data were also overlapped to those obtained by the infrared camera. They together allowed to identify the critical points of the ambient parameters as useful tool for the management of the farming operations inside the greenhouse.
Biosystems Engineering, Sep 1, 2019
Due to the ever increasing diffusion of Radio Frequency IDentification (RFID) in logistic process... more Due to the ever increasing diffusion of Radio Frequency IDentification (RFID) in logistic processes, the localization of the tags in the environment is becoming an important feature for many RFID-based inventory management systems. RFID-based Location system will allow offering value-added services logistics operators, and RFID tags can be used for more than just labeling items. This paper proposes a Received Signal Strength (RSS) based positioning system for perishable products equipped with active UHF RFID tags inside a refrigerated warehouse (4C\ub0). The major performance metrics of interest for indoor positioning systems are the accuracy and the precision in estimating signal strength within the coverage map. A fundamental problem in the design of RFID based localization system is the evaluation and mapping of the signals attenuation, which depends upon several parameters (fading from obstacles in the transmission path, reflections off surfaces and relative antenna orientation). Theoretical path loss models are therefore inadequate for a reliable prediction of the signal strength. In this paper, the design of the RFID localization system is tackled considering an initial experimental analysis of the ranging error with respect to the signal strength. The position of the antennas and the corresponding coverage map is finally obtained by means of a simulation tool based on 2D ray tracing algorithm, taking into account how the real environmental conditions in the warehouse, like temperature, humidity and the presence of the storage infrastructures, influence the attenuation of the signal
The mechanization of olives The mechanization of olives harvesting is very important both to redu... more The mechanization of olives The mechanization of olives harvesting is very important both to reduce the costs of d i d h production and to assure the oil quality. The manual harvest does not allow to operate at the right time and also need a long g period to be completed.
International Journal of Rf Technologies: Research and Applications, 2010
In the industrial warehouse design domain, today's computerized information systems have gain... more In the industrial warehouse design domain, today's computerized information systems have gained a relevant interest due to the issues related to asset tracking and traceability. In such context, the employment of new information technologies on warehouse management systems has opened new business opportunities due to the sensible price reduction in the last years. This paper focuses on the technical issues related to the realization of wireless localization systems for warehouses, which are necessary for the implementation of random allocation policies, and in particular investigates the opportunities offered by RFID technology in such context. The enforcement of random allocation policies allows to increase the utilization coefficient of warehouses which is a critical issue, for example in refrigerated warehouses for perishable products. In particular, the development of localization systems based on trilateration is here considered, and an experimental model which links the received signal strength to the reading distance has been determined in order to take into account the specific features of the technology employed. A methodology is hence proposed to overcome the simplifying assumptions theoretical attenuation models rely on, by fitting a mathematical model on experimental observations. The problem of the accuracy level required to locate Stock Keeping Units (SKUs) of fixed dimensions is also considered, resulting in the evaluation of the maximum allowed reading distance. On the basis of the obtained results, the optimal configuration of the fixed infrastructure in terms of the number of antennas and their position is finally defined.
Computers and Electronics in Agriculture, Feb 1, 2022
Powered by Editorial Manager® and ProduXion Manager® from Aries Systems Corporation To Editorial ... more Powered by Editorial Manager® and ProduXion Manager® from Aries Systems Corporation To Editorial Department of Computers and Electronics in Agriculture Object: Cover Letter for the manuscript "Worker safety in agriculture 4.0: a new approach for mapping operator's vibration risk through Machine Learning activity recognition". Dear Editor, I am submitting the manuscript entitled "Worker safety in agriculture 4.0: a new approach for mapping operator's vibration risk through Machine Learning activity recognition", for consideration of publication in Computers and Electronics in Agriculture. The manuscript discusses the application of machine learning methods for activity recognition and risk assessment in agriculture, and reports the results of experimental tests in olive harvesting.
Materials
To realize the benefits of a hydrogen economy, hydrogen must be produced cleanly, efficiently and... more To realize the benefits of a hydrogen economy, hydrogen must be produced cleanly, efficiently and affordably from renewable resources and, preferentially, close to the end-users. The goal is a sustainable cycle of hydrogen production and use: in the first stage of the cycle, hydrogen is produced from renewable resources and then used to feed a fuel cell. This cycle produces no pollution and no greenhouse gases. In this context, the development of electrolyzers producing high-purity hydrogen with a high efficiency and low cost is of great importance. Electrode materials play a fundamental role in influencing electrolyzer performances; consequently, in recent years considerable efforts have been made to obtain highly efficient and inexpensive catalyst materials. To reach both goals, we have developed electrodes based on Pd–Co alloys to be potentially used in the PEMEL electrolyzer. In fact, the Pd–Co alloy is a valid alternative to Pt for hydrogen evolution. The alloys were electrodep...
Batteries
Nanostructured Pb electrodes consisting of nanowire arrays were obtained by electrodeposition, to... more Nanostructured Pb electrodes consisting of nanowire arrays were obtained by electrodeposition, to be used as negative electrodes for lead–acid batteries. Reduced graphene oxide was added to improve their performances. This was achieved via the electrochemical reduction of graphene oxide directly on the surface of nanowire arrays. The electrodes with and without reduced graphene oxide were tested in a 5 M sulfuric acid solution using a commercial pasted positive plate and an absorbed glass mat separator in a zero-gap configuration. The electrodes were tested in deep cycling conditions with a very low cut-off potential. Charge–discharge tests were performed at 5C. The electrode with reduced graphene oxide outperformed the electrode without reduced graphene oxide, as it was able to work with a very high utilization of active mass and efficiency. A specific capacity of 258 mAhg−1–very close to the theoretical one–was achieved, and the electrode lasted for more than 1000 cycles. On the o...
Sensors
Wearable sensors for sweat biomarkers can provide facile analyte capability and monitoring for se... more Wearable sensors for sweat biomarkers can provide facile analyte capability and monitoring for several diseases. In this work, a green wearable sensor for sweat absorption and chloride sensing is presented. In order to produce a sustainable device, polylactic acid (PLA) was used for both the substrate and the sweat absorption pad fabrication. The sensor material for chloride detection consisted of silver-based reference, working, and counter electrodes obtained from upcycled compact discs. The PLA substrates were prepared by thermal bonding of PLA sheets obtained via a flat die extruder, prototyped in single functional layers via CO2 laser cutting, and bonded via hot-press. The effect of cold plasma treatment on the transparency and bonding strength of PLA sheets was investigated. The PLA membrane, to act as a sweat absorption pad, was directly deposited onto the membrane holder layer by means of an electrolyte-assisted electrospinning technique. The membrane adhesion capacity was i...
Polymers
In this work, composite coatings of chitosan and silver nanoparticles were presented as an antiba... more In this work, composite coatings of chitosan and silver nanoparticles were presented as an antibacterial coating for orthopedic implants. Coatings were deposited on AISI 304L using the galvanic deposition method. In galvanic deposition, the difference of the electrochemical redox potential between two metals (the substrate and a sacrificial anode) has the pivotal role in the process. In the coupling of these two metals a spontaneous redox reaction occurs and thus no external power supply is necessary. Using this process, a uniform deposition on the exposed area and a good adherence of the composite coating on the metallic substrate were achieved. Physical-chemical characterizations were carried out to evaluate morphology, chemical composition, and the presence of silver nanoparticles. These characterizations have shown the deposition of coatings with homogenous and porous surface structures with silver nanoparticles incorporated and distributed into the polymeric matrix. Corrosion t...
Over the past 50 years, vertically integrated multinationals dominated global food markets by pro... more Over the past 50 years, vertically integrated multinationals dominated global food markets by providing huge product diversity at low prices. Such systems are characterized by long supply chains capable of achieving high cost efficiencies resulting from the use of cheap raw materials, high chemical inputs, industrial shelf-life extension processes, economies of scale and mechanization. This dominant position on the market, however, has been achieved at a heavy cost on the global environment, generated by massive food wastage, and by a steady supply of fossil fuels. For such reasons, global supply chains are considered unsustainable and new food systems are being promoted in order to replace them on the long run. It is generally recognized that, in order to be sustainable and competitive a food system must be based on shortened/local supply chains thus reducing the inefficiencies of multiple marginalization. The current market situation, characterized an ever increasing request for h...
Procedia Computer Science, 2021
International journal of applied engineering research, 2015
In this paper, we present a Multi Objective Genetic Algorithm (MOGA) for modelling and solving th... more In this paper, we present a Multi Objective Genetic Algorithm (MOGA) for modelling and solving the Multimode Job-shop Scheduling Problem (MJSP), which aims at finding the start times and execution modes for the operations of different jobs that optimize a given set of objective functions while verifying precedence and resource constraints. The proposed model can be used to generate alternative schedules based on the relative magnitude and importance of different objectives. Its main contributions are the mode assignment procedure in the chromosome generation and the use of three fitness functions. Its performance is demonstrated by computational results obtained on a set of standard instances and against the best currently available algorithms
International Journal of RF Technologies, 2012
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Papers by Giuseppe Aiello