1,721,213 research outputs found
Appunti per una lettura 'allargata' di D. 41,2,34,2
No full textIl contributo esamina un passo del Digesto escerpito dal settimo libro delle Disputationes di Ulpiano (D. 41, 2, 34, 2) relativo all’ac- quisto del possesso domino ignoranti ad opera del servo proprio e del servus alienus comunque posseduto o posseduto da nessuno. Sebbene sia stato sospettato di molteplici interpolazioni formali e sostanziali, l’autore ne afferma la sostanziale genuinità, alla luce di un confronto col precedente § 1 del medesimo frammento.The contribution tends to examine a Digest text extracted from the seventh book of Ulpian’s Disputationes (D. 41, 2, 34, 2) related to the acquisition of possession domino ignoranti by his own servus and by the servus alienus in any case possessed by himself or possessed by no one. Although suspected of being a lot interpolated in form and substance, the author claims its substancial authenticity, also com- paring it with the previous § 1 of the same text
UBI EST PECULII NOMEN, IBI SEMPER NODUS VEL SCRUPULUS ALIQUIS. LA PARAFRASI GRECA DELLE ISTITUZIONI DI GIUSTINIANO E LA DEFINIZIONE DI PECULIO NEL COMMENTO ANTECESSORIALE DI PT. 4, 7, 4C
No full textL’articolo esamina gli aspetti sostanziali e formali del commen- to che la Parafrasi greca delle Istituzioni dedica a I. 4, 7, 4c, riguar- dante la determinazione del peculio nell’ambito dell’actio de peculio e dell’actio de in rem verso, per mettere in luce le caratteristiche della methodus docendi costantinopolitana del VI secolo d.C.
Le Istituzioni si limitavano ad affermare che il peculio è ciò che resta, dedotti i debiti intra-domum del servo, esclusi quelli del ser- vo ordinario nei confronti del vicario, che fa parte del peculio del pri- mo. La Parafrasi, anziché tradurre e commentare il testo, imbastisce una brillante ed unitaria lezione antecessoriale che offre agli studen- ti, seppur nell’economia di un commento paragrafico, un quadro d’in- sieme più completo, contenente la definizione di peculio e un accenno a come lo stesso si costituisca nonché la precisazione che i debiti da dedurre sono debiti naturali. Quanto all’eccezione sui debiti nei con- fronti del vicario, il testo greco sostituisce alla laconicità del testo- base un esempio destinato a spiegare plasticamente agli studenti la portata dell’eccezione.
Passando dall’esame del merito a quello delle fonti impiegate dal Parafraste nel suo commento, l’autore individua nel 29o libro del commento ulpianeo alla clausola dumtaxat de peculio dell’editto del pretore nonché nel primo titolo del XVo libro del Digesto la probabi- le falsariga del discorso antecessoriale, evidenziando così la funzio- ne di raccordo dei commenti paragrafici con le nozioni che gli studen- ti avrebbero appreso negli anni successivi di studio: nel caso di spe- cie, nel secondo o nel terzo anno accademico, studiando la pars de re- bus del Digesto
A novel approach for the prevention of ionizing radiation-induced bone loss using a designer multifunctional cerium oxide nanozyme
No full textThis repository provides additional computational data to accompany the paper: A Novel approach for the prevention of ionizing radiation-induced bone loss using a designer multifunctional cerium oxide nanozyme, Fei Wei, Craig J. Neal, Tamil Selvan Sakthivel, Yifei Fu, Mahmoud Omer, Amitava Adhikary, Samuel Ward, Khoa Minh Ta, Samuel Moxon, Marco Molinari, Jackson Asiatico, Michael Kinzel, Sergey N. Yarmolenko, Vee San Cheong, Nina Orlovskaya, Ranajay Ghosh, Sudipta Seal, Melanie Coathup, Bioactive Materials, 2023, 21, 547-565, https://doi.org/10.1016/j.bioactmat.2022.09.01
Cerebellar information processing and visuospatial functions
No full textAlthough there are consistent reports of altered visuospatial abilities in subjects with cerebellar pathologies, and although experimental evidence indicates the importance of this part of the brain in spatial processing, the role of the cerebellum in this area remains elusive. In the present essay, experimental and clinical studies from our group, focussing relations between cerebellum and visuospatial functions are reviewed. Explorative behaviour, visuospatial abilities and sequential spatial processing functions are analyzed to focus cerebellar involvement in spatial data processing. Reviewed evidence enlightens the importance of the cerebellum for scanning sensory data to extract relevant spatial information and for the acquisition of spatial-related procedures. This hypothesis is discussed within the general framework of cerebellar involvement in cognition.Although there are consistent reports of altered visuospatial abilities in subjects with cerebellar pathologies, and although experimental evidence indicates the importance of this part of the brain in spatial processing, the role of the cerebellum in this area remains elusive. In the present essay, experimental and clinical studies from our group, focussing relations between cerebellum and visuospatial functions are reviewed. Explorative behaviour, visuospatial abilities and sequential spatial processing functions are analyzed to focus cerebellar involvement in spatial data processing. Reviewed evidence enlightens the importance of the cerebellum for scanning sensory data to extract relevant spatial information and for the acquisition of spatial-related procedures. This hypothesis is discussed within the general framework of cerebellar involvement in cognition
The cerebellum and neural networks for rhythmic sensorimotor synchronization in the human brain
No full textSensorimotor synchronization (SMS) is the rhythmic synchronization between a timed sensory stimulus and a motor response. This rather simple function requires complex cerebral processing whose basic mechanisms are far from clear. The importance of SMS is related to its hypothesized relevance in motor recovery following brain lesions. This is witnessed by the large number of studies in different disciplines addressing this issue. In the present review we will focus on the role of the cerebellum by referring to the general modeling of SMS functioning. Although at present no consensus exists on cerebellar timekeeping function it is generally accepted that cerebellar input and output flow process time information. Reviewed data are considered within the framework of the 'sensory coordination' hypothesis of cerebellar functioning. The idea that timing might be within the parameters that are under cerebellar control to optimize cerebral cortical functioning is advanced.Sensorimotor synchronization (SMS) is the rhythmic synchronization between a timed sensory stimulus and a motor response. This rather simple function requires complex cerebral processing whose basic mechanisms are far from clear. The importance of SMS is related to its hypothesized relevance in motor recovery following brain lesions. This is witnessed by the large number of studies in different disciplines addressing this issue. In the present review we will focus on the role of the cerebellum by referring to the general modeling of SMS functioning. Although at present no consensus exists on cerebellar timekeeping function it is generally accepted that cerebellar input and output flow process time information. Reviewed data are considered within the framework of the 'sensory coordination' hypothesis of cerebellar functioning. The idea that timing might be within the parameters that are under cerebellar control to optimize cerebral cortical functioning is advanced
Cerebellar contribution to feedforward control of locomotion
No full textThe cerebellum is an important contributor to feedforward control mechanisms of the central nervous system, and sequencing—the process that allows spatial and temporal relationships between events to be recognized—has been implicated as the fundamental cerebellar mode of operation. By adopting such a mode and because of cerebellar activity patterns are sensitive to a variety of sensorimotor-related tasks, the cerebellum is believed to support motor and cognitive functions that are encoded in the frontal and parietal lobes of the cerebral cortex. In this model, the cerebellum is hypothesized to make predictions about the consequences of a motor or cognitive command that originates from the cortex to prepare the entire system to cope with ongoing changes. In this framework, cerebellar predictive mechanisms for locomotion are addressed, focusing on sensorial and motoric sequencing. The hypothesis that sequence recognition is the mechanism by which the cerebellum functions in gait control is presented and discussed
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
Cerebellar sequencing for cognitive processing
No full textThe idea that cerebellar processing is required in a variety of cognitive functions is well accepted in the neuroscience community. Nevertheless, the definition of the cerebellar role in the different cognitive domains remains obscure. Current data from lesion studies in humans and from experimental lesion in rats on perceptual and cognitive processing are reviewed with special emphasis on cerebellar sequencing properties. Evidence converges in highlighting sequence detection as the key stone of cerebellar functioning across modalities. The hypothesis that sequence detection might represent the main contribution of cerebellar physiology to brain functioning is presented and discussed
Phonological short-term store impairment after cerebellar lesion: A single case study
No full textThe cerebellum is a recent addition to the growing list of cerebral areas involved in the multifaceted structural system that sustains verbal working memory (vWM), but its contribution is still a matter of debate. Here, we present a patient with a selective deficit of vWM resulting from a bilateral cerebellar ischemic lesion. After this acute event, the patient had impaired immediate and delayed word-serial recall and auditory-verbal delayed recognition. The digit span, however, was completely preserved. To investigate the cerebellar contribution to vWM, four experiments addressing the function of different vWM phonological loop components were performed 18 months after the lesion, and results were compared with normative data or, when needed, with a small group of matched controls. In Experiment 1, digit span was assessed with different presentation and response modalities using lists of digits of varying lengths. In Experiment 2, the articulatory rehearsal system was analyzed by measurement of word length and articulatory suppression effects. Experiment 3 was devoted to analyzing the phonological short-term store (ph-STS) by the recency effect, the phonological similarity effect, short-term forgetting, and unattended speech. Data suggested a possible key role of the semantic component of the processed material, which was tested in Experiment 4, in which word and nonword-serial recall with or without interpolating activity were analyzed. The patient showed noticeably reduced scores in the tasks that primarily or exclusively engaged activity of the ph-STS, namely those of Experiment 3, and good performance in the tests that investigated the recirculation of verbal information. This pattern of results implicates the ph-STS as the cognitive locus of the patient's deficit. This report demonstrates a cerebellar role in encoding and/or strengthening the phonological traces in vWM. (c) 2008 Elsevier Ltd. All rights reserved.The cerebellum is a recent addition to the growing list of cerebral areas involved in the multifaceted structural system that sustains verbal working memory (vWM), but its contribution is still a matter of debate. Here, we present a patient with a selective deficit of vWM resulting from a bilateral cerebellar ischemic lesion. After this acute event, the patient had impaired immediate and delayed word-serial recall and auditory-verbal delayed recognition. The digit span, however, was completely preserved. To investigate the cerebellar contribution to vWM, four experiments addressing the function of different vWM phonological loop components were performed 18 months after the lesion, and results were compared with normative data or, when needed, with a small group of matched controls. In Experiment 1, digit span was assessed with different presentation and response modalities using lists of digits of varying lengths. In Experiment 2, the articulatory rehearsal system was analyzed by mea
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