130 research outputs found
Seasonal concentrations and fluxes of dissolved, soluble, and colloidal Fe and dissolved organic matter amount and composition (DOC and PARAFAC)
No full textThese datasets accompany the following manuscript:
Logozzo, L.A.*, Hosen, J.D., McArthur, J., and Raymond, P.A. Distinct drivers of two size fractions of operationally dissolved Fe in a temperate river. Limnology and Oceanography.
*Corresponding Author: Laura A. Logozzo, [email protected]
Datasets:
1- Fe-DOM-EMMA-merged.xlsx: this dataset includes operationally dissolved (<0.22 µm), colloidal (0.02-0.22 µm), and soluble (<0.02 µm) DOC concentrations, total Fe concentrations, PARAFAC component scores <0.22 µm, and end-member mixing model scores <0.22 µm. Samples were collected approximately bi-weekly from the Connecticut River at Thompsonville from April 2018 to March 2020.
2- Loadest-merged.xlsx: this dataset includes LOADEST-modeled daily-average and monthly-average fluxes of operationally dissolved (<0.22 µm), colloidal (0.02-0.22 µm), and soluble (<0.02 µm) Fe, DOC <0.22 µm, and allochthonous-like DOC <0.22 µm.
All methodology is described in the accompanied manuscript
L'abuso del diritto nell'IVA
No full textIl principio dell'abuso del diritto è stato elaborato proprio con riguardo all'IVA. A partire dalla nota sentenza Halifax, la Corte di Giustizia ha elaborato le fattispecie sintomatiche dell'abuso del diritto a livello europeo. Tali principi devono essere coordinati a livello interno con l'art. 10-bis dello Statuto dei diritti del contribuente, che ha recepito, non senza difficoltà, la disciplina europea
A New Automated 2 DOFs 3D Desktop Optical Scanner
No full textThe goal of this research work was to create a completely automated desktop 3D optical measuring system for parts having freeform and complex surfaces, with high and certifiable resolution, precision and accuracy to be suitable for metrology. The proposed device is based on the principle of structured light active triangulation. The hardware system consists of an optical system, with a 2 degrees of freedom (DOFs) motorized tilt-rotational table and a framework providing fixtures for a proper location of the target specimen. The software module is able to synchronize the optical and mechanical systems after optical and mechanical calibrations. The mesh representing the measured object is registered automatically by stitching together all the single 3D data sets acquired at each movement of the positioning system. The quality of the result is evaluated by checking the difference between a certified reference model and the measured data
Root Morphology, Allometric Relations and Rhizosheath of Ancient and Modern Tetraploid Wheats (Triticum durum Desf.) in Response to Inoculation with Trichoderma harzianum T-22
No full textEarly root traits and allometrics of wheat are important for competition and use of resources. They are under-utilized in research and un-explored in many ancient wheats. This is especially true for the rhizosheath emerging from root-soil interactions. We investigated root morphology, root/shoot relations and the amount of rhizosheath of four tetrapoid wheat seedlings (30 days after emergence): the italian landrace Saragolle Lucana and modern varieties Creso, Simeto and Ciclope, and tested the hypothesis that inoculation with Trichoderma harzianum T-22 (T-22) enhances rhizosheath formation and affects wheat varieties differently. Overall growth of non-inoculated plants showed different patterns in wheat varieties, with Saragolle and Ciclope at the two extremes: Saragolle invests in shoot rather than root mass, and in the occupation of space with highest (p < 0.05) shoot height to the uppermost internode (5.02 cm) and length-to-mass shoot (97.8 cm g−1) and root (more than 140 m g−1) ratios. This may be interpreted as maximizing competition for light but also as a compensation for low shoot efficiency due to the lowest (p < 0.05) recorded values of optically-measured chlorophyll content index (22.8). Ciclope invests in biomass with highest shoot (0.06 g) and root (0.04 g) mass and a thicker root system (average diameter 0.34 mm vs. 0.29 in Saragolle) as well as a highest root/shoot ratio (0.95 g g−1 vs. 0.54 in Saragolle). Rhizosheath mass ranged between 22.14 times that of shoot mass in Ciclope and 43.40 in Saragolle (different for p < 0.05). Inoculation with Trichoderma increased the amount of rhizosheath from 9.4% in Ciclope to 36.1% in Simeto and modified root architecture in this variety more than in others. Ours are the first data on roots and seedling shoot traits of Saragolle Lucana and of Trichoderma inoculation effects on rhizosheath. This opens to new unreported interpretations of effects of Trichoderma inoculation on improving plant growth
Raccolta e caratterizzazione di germoplasma di specie orticole nelle aree interne della Basilicata
No full textAl fine di salvaguardare la diversità genetica del germoplasma vegetale ortivo della regione Basilicata, e per monitorare il grado di erosione genetica, in 14 comuni delle aree interne regionali è stata condotta una missione di raccolta di landraces di specie orticole. In totale sono state raccolte 348 accessioni appartenenti prevalentementeai generi Phaseolus, Capsicum e Lycopersicon. La ricerca ha evidenziato che le landraces sono conservate da agricoltori anziani (età media di 60 anni), che conducono aziende agricole isolate e che utilizzano sistemi produttivi tradizionali. il 12% delle accessioni sono state raccolte nei 'centri abitati'.
Per valutare la diversità morfologica e produttiva delle 68 accessioni di pomodoro, sono state allestite prove sperimentali in due ambienti molto diversificati. I risultati hanno mostrato che lke accessioni raccolte rappresentano un germoplasma interessante rappresentativo della vasta diversitàò genetica di pomodoro ancora disponibile nella Regione Basilicata.
Tutto questo mostra l'importanza del ruolo svolto dagli agricoltori nel conservare la diversità genetica biologica delle diverse razze locali. Per salvaguardare questo ricco patrimonio geneticoè ipotizzabile sviluppare una strategia di conservazione 'on farm'
Contact mechanics analysis of a soft robotic fingerpad
No full textThe precision grasping capabilities of robotic hands is a key feature which is more and more required in the manipulation of objects in several unstructured fields, as for instance industrial, medical, agriculture and food industry. For this purpose, the realization of soft robotic fingers is crucial to reproduce the human finger skills. From this point of view the fingerpad is the part which is mostly involved in the contact. Particular attention must be paid to the knowledge of the mechanical contact behavior of soft artificial fingerpads. In this paper, artificial silicone fingerpads are applied to the last phalanx of robotic fingers actuated by tendons. The mechanical interaction between the fingerpad and a flat surface is analyzed in terms of deformations, contact areas and indentations. A reliable model of fingertip deformation properties provides important information for understanding robotic hand performance, that can be useful both in the design phase and for defining control strategies. The approach is based on theoretical, experimental, and numerical methods. The results will be exploited for the design of more effective robotic fingers for precision grasping of soft or fragile objects avoiding damages
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