1,721,408 research outputs found
Potential and actual bud fruitfulness: A tool for predicting and managing the yield of table grape varieties
Full text linkMicroscopic bud dissection can be used to assess grapevine bud fruitfulness prior to winter pruning and long before actual bud fruitfulness can be measured in the vineyard the following spring. Bud dissections should be performed by qualified and trained personnel because inflorescence primordia are difficult to distinguish in some varieties. In the Puglia region, Southeastern Italy, in 2018 and 2019, potential fruitfulness using bud dissection and actual fruitfulness observed in the vineyard were compared for seventeen table grape varieties. The percentage of fertile buds, the number of inflorescence primordia (IP) per node, and the incidence of primary bud necrosis (PBN) were detected with bud dissection to be used either for managing winter pruning or for predicting yield during the successive season. The data were successively compared with fertile buds and actual bud fruitfulness observed in the vineyard during spring. The table grape varieties examined had similar values of fertile buds and fruitfulness both with bud dissection and in the vineyard. The application of longitudinal sections in bud dissections can be an alternative approach (or can be integrated into traditional cross sections) to distinguish IP in some difficult varieties, but the two techniques can be used together for more repeatable results. The bud dissection technique (with both cross and longitudinal sections) can provide useful insights for viticulturist to help guide winter pruning (intensity of pruning and number of canes) and to predict potential yield
Parallel Program Analysis and Restructuring by Detection of Point-To-Point Interaction Patterns and their Transformation into Collective Communication Constructs
No full textHigh-Performance and Interoperable Security Services for Mobile Environments
No full textThis paper presents a multi-tier architecture, which combines a hardware-accelerated back-end and a Web Services based web tier to deliver high-performance, fully interoperable Public Key Infrastructure (PKI) and digital time stamping services to mobile devices. The paper describes the organization of the multi-tier architecture and provides a thorough description of individual components
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
Exploring the Grape Agrivoltaic System: Climate Modulation and Vine Benefits in the Puglia Region, Southeastern Italy
No full textClimate change poses significant challenges to agriculture, a sector with a long-standing tradition in the Mediterranean basin. The region faces altered rainfall patterns, extreme temperatures, aridification, loss of biodiversity, and changes in crop yield and quality. These impacts, combined with intensive farming practices, threaten long-term agricultural sustainability. This study investigates agrivoltaics (AVs), a dual-use technology that integrates solar energy production (photovoltaic panels) with agriculture, as a potential solution to enhance resilience and adaptation of crops. Research at an AV system in Puglia (Southeastern Italy), combined with grapevine (Vitis vinifera L.), assessed soil moisture, temperature, and microclimate conditions together with vine yield and fruitfulness. Results showed that shading from photovoltaic panels increased soil moisture and moderated soil temperature, thus benefiting crops. Vines beneath the panels yielded more grapes (+277%) than in the full sun, confirmed by even the better bud fruitfulness of the shaded canes. While panels had minimal impact on air temperature, they reduced wind speed and vapor pressure deficit, creating a better microenvironment for vines. Spectral analysis revealed an increase in UV and blue light under the panels, potentially affecting photosynthesis. The AV system also produced substantial electricity, more than 90% compared to a ground-mounted system, demonstrating its dual-use application. The higher land equivalent ratio (LER) achieved by the AV system (3.54) confirmed that such systems can be advantageous in areas with a Mediterranean climate, allowing crop and energy production on the same land
Authenticating IoT Devices with Physically Unclonable Functions Models
No full textWirelessly connected smart embedded devices, forming the so called Internet of Things network, have achieved unprecedented levels of diffusion as they are adopted in many application domains, ranging from goods transportation to eHealth monitoring infrastructure. As they are always inherently connected, hence exposed to attacks, and as they densely populate our daily life collecting, managing and elaborating data, security has drawn a lot of attention in the literature. In a crowded network, classical security approaches may be not adequate, since they require secret sharing or public key distribution infrastructures. Physically Unclonable Functions (PUFs), introduced so far, are exploitable as security primitives, providing easy authentication and secure key storage mechanisms. Traditional PUF authentication schemes rely on the enrollment of some challenge/response pairs (CRPs), extracted before each device is issued, as it is not feasible to retrieve the whole CRPs set. Moreover, accomplishing such a procedure may introduce a significant overhead due to the cardinality of extracted CRPs and due to size of the device population. To avoid these issues, in this paper we exploit the knowledge of a PUF model in order to make available the whole CRPs set, and, by adopting an encryption scheme, we hide it to avoid model based attacks which can be performed on CRPs sent in clear. To this aim, we show an implementation based on the Anderson PUF and on AES, realized on a Xilinx Zynq-7000 Field Programmable Gate Array
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