KRIZA I NESTABILNOST U RAZDOBLJU POSLIJE TITA: POČETAK PROCESA RASPADA JUGOSLAVENSKE FEDERACIJE (1981 .-1985.)

Questo articolo affronta alcuni cruciali problemi che si manifestarono in Jugoslavia all \u27indomani della morte di Tito e che negli anni successivi si acuirono ulteriormente. Si tratta di problemi politici, sociali ed economici che erano diretta conseguenza del titoismo quale prassi e metodo di governo. La crisi che investì la Jugoslavia dopo il 1980, innescò un processo degenerativo che riguardò diversi ambiti da quello economico, costituzionale e politico fino a quello nazionale, con interazioni evidentemente molteplici, data la complessità della sua natura. Le élites politiche e i vari soggetti istituzionali non furono in grado di rispondere univocamente a questa crisi policentrica, anzi ingaggiarono ripetuti confronti a vari livelli dell \u27apparato federale, palesando i limiti dell \u27edificio costituzionale. Gli anni in questione furono punteggiati dalla caduta di molti tabù e da notevole vivacità culturale, che diffusero nella società nuove sensibilità e plasmarono un \u27opinione pubblica più matura e consapevole. Cercando di non cadere nel "sofisma dello storico ", cioè in una costruzione cognitiva indotta dalla conoscenza degli avvenimenti successivi, l \u27autore individua in questo periodo e nell\u27incapacità del sistema ad avviare le riforme necessarie i presupposti per la fine della Federazione jugoslava.Ovaj clanak razmatra nekoliko temeljnih problema koji su se poj avili u Jugoslaviji po Titovoj smrti, a u narednim su se godinama jos vise zaostrili. Radi se o politickim, drustvenim i gospodarskim problemima nastali m kao neposredna posljedica titoizma kao prakse i metode vladanj a. Kriza sto je zahvatila Jugoslaviju nakon 1980-te pokrenula je proces degeneracije na razliciti m podrucjima, od ekonomskog, ustavnog i politickog sve do nacionalnog, jasno uz visestruko preplitanje zbog njezine kompleksnosti. Politicke vrhuske i razliciti institucionalni subjekti nisu se uspjeli jednodusno suprotstaviti ovoj policentricnoj krizi, stovise neprekidno su se sukobljavali na svim razinama federa! ne uprave, javno ukazujuéi na limite ustavne tvorevine. Karakteristika je ti h godina da su sruseni mnogi tabui, a kultura je znatno zivnula, pa se drustvom prosirio novi senzibilitet i oblikovalo se zrelije i svjesnije javno misljenje. Pokusavajuéi izbjeéi zarnku «povjesnicarskog sofizma», tj . izvodenja zakljucaka pod utjecajem saznanja o dogadanjima koji su uslijedili, autor, u tom razdoblju i nesposobnosti si stema da pokrene neophodne reforme, prepoznaje uzroke kraja Jugoslavenske federacije

Nanotechnology for Humans and Humanoids A vision of the use of nanotechnology in future robotics

Humanoids will soon co-exist with humans, helping us at home and at work, assisting elder people, replacing us in dangerous environments and somewhat adding to our personal communication devices the capability to actuate motion. In order for humanoids to be compatible with our everyday tools and our lifestyle it is however mandatory to reproduce (at least partially) the body-mind nexus that makes humans so superior to machines. This requires a totally new approach to humanoid technologies, combining new responsive and soft materials, bioinspired sensors, high efficiency power sources and cognition/intelligence of low computational cost: in other words, an unprecedented merge of nanotechnology, cognition and mechatronics

Are the glasses in mantle xenoliths witness of the metasomatic agent composition?

Glass veins and pockets in mantle xenoliths are often considered as indicators of the composition of metasomatic agents affecting the mantle. Here we demonstrate that infiltration of, and reaction with, the host basalt may produce glassy veins and pockets whose composition encompasses that of different potential metasomatic agents. The xenoliths studied are 4-19 cm large, equigranular, spinel-facies harzburgites and lherzolites from the Patagonia lithospheric mantle. A reaction rim occurs at the contact with the basalt. Peridotite orthopyroxene is in reaction with the basalt and a glassy pocket (up to 600 μm in diameter) is thereby formed. New crystals of euhedral olivine (Fo = 84) and Ti-oxides crystallise in the glass pocket close to the basalt, while euhedral crystals of clinopyroxene (mg# = 85-89) and olivine crystallise close to orthopyroxene. The reaction-crystallisation processes induce dramatic compositional variations in theglass pocket from phonotephryte to trachyte. Trace element concentration and patterns and the element anomalies are controlled by the reaction-crystallisation process. Orthopyroxene dissolution has mainly a dilution effect, whereas clinopyroxene crystallisation and the crystallization of Ti oxides (and apatite) largely controls the trace element fractionation and element anomalies. The largest trace element variations are documented in the veins. The studied glasses obviously do not represent metasomatic agents that affected the lithospheric mantle, but the large compositional variations they document encompass those of glasses quoted in literature (Wulff-Pedersen et al., 1996; Coltorti et al., 2000) and believed to represent metasomatic agents, thus suggesting caution in drawing inferences on mantle processes and components from glass pockets and veins in xenoliths

Equivocal carbonatite markers in the mantle xenoliths of the Patagonia backarc: the Gobernador Gregores case (Santa Cruz Province, Argentina)

Amphibole ± phlogopite ± apatite-bearing mantle xenoliths at Gobernador Gregores display modal, bulk-rock and phase geochemical characteristics held as indicators of carbonatitic metasomatism. However, part of these xenoliths has high TiO₂/Al₂O3 and those displaying the most pronounced carbonatitic geochemical markers modally trend towards harzburgite. Bulk-rock, clinopyroxene and amphibole show Zr, Hf and Ti negative anomalies, which increase at decreasing Na₂O and high field strength elements (HFSE) concentrations. Steady variation trends between xenoliths which have and do not have carbonatitic characteristics suggest a control by reactive porous flow of only one agent, inferred to be initially a ne-normative hydrous basalt (because of the presence of wehrlites) evolving towards silica saturation. Variation trends exhibit cusps when amphibole appears in the mode. Appearance of amphibole may explain the Ti anomaly variations, but not those of Zr and Hf. Numerical modelling [Plate Model (Vernieres et al. in J Geophys Res 102:24771–24784, 1997)] gives results consistent with the observed geochemical features by assuming the presence of loveringite. Modest HFSE anomalies in the infiltrating melt may be acquired during percolation in the garnet-facies.Facultad de Ciencias Naturales y MuseoCentro de Investigaciones Geológica

The design and validation of the R1 personal humanoid

In recent years the robotics field has witnessed an interesting new trend. Several companies started the production of service robots whose aim is to cooperate with humans. The robots developed so far are either rather expensive or unsuitable for manipulation tasks. This article presents the result of a project which wishes to demonstrate the feasibility of an affordable humanoid robot. R1 is able to navigate, and interact with the environment (grasping and carrying objects, operating switches, opening doors etc). The robot is also equipped with a speaker, microphones and it mounts a display in the head to support interaction using natural channels like speech or (simulated) eye movements. The final cost of the robot is expected to range around that of a family car, possibly, when produced in large quantities, even significantly lower. This goal was tackled along three synergistic directions: use of polymeric materials, light-weight design and implementation of novel actuation solutions. These lines, as well as the robot with its main features, are described hereafter

Effect of Lockdowns on Hospital Staff in a COVID Center: A Retrospective Observational Study

At the onset of the SARS-CoV-2 pandemic, individual and social measures were strengthened through restrictive non-pharmaceutical interventions, labelled with the term "lockdown". In Italy, there were two lockdowns (9 March 2020-3 May 2020 and 3 November 2020-27 March 2021). As part of preventive measures, healthcare workers and the administrative staff population of Policlinico A. Gemelli underwent nasopharyngeal swab tests from 1 March 2020 to 9 February 2022, a long time interval that includes the two aforementioned lockdowns. The population included 8958 people from 1 March 2020 to 31 December 2020; 8981 people from 1 January 2021 to 31 December 2021; and 8981 people from 1 January 2022 to 9 February 2022. We then analysed pseudo-anonymized data, using a retrospective observational approach to evaluate the impact of the lockdown on the incidence of SARS-CoV-2 infections within the population. Given the 14 day contagious period, the swab positivity rate (SPR) among the staff decreased significantly at the end of the first lockdown, every day prior to 18 May 2020, by 0.093 (p < 0.0001, CI = (-0.138--0.047)). After the fourteenth day post the end of the first lockdown (18 May 2020), the SPR increased daily at a rate of 0.024 (p < 0.0001, 95% CI = (0.013-0.034)). In addition, the SPR appeared to increase significantly every day prior to 17 November 2020 by 0.024 (p < 0.0001, CI = (0.013-0.034)). After the fourteenth day post the start of the second lockdown (17 November 2020), the SPR decreased daily at a rate of 0.039 (p < 0.0001, 95% CI = (-0.050--0.027)). These data demonstrate that, in our Institution, the lockdowns helped to both protect healthcare workers and maintain adequate standards of care for COVID and non-COVID patients for the duration of the state of emergency in Italy

Eps8 Regulates Axonal Filopodia in Hippocampal Neurons in Response to Brain-Derived Neurotrophic Factor (BDNF)

A novel signaling cascade controlling actin polymerization in response to extracellular signals regulates filopodia formation and likely also neuronal synapse formation

COVID-19 atypical Parsonage-Turner syndrome: a case report

Background Neurological manifestations of Sars-CoV-2 infection have been described since March 2020 and include both central and peripheral nervous system manifestations. Neurological symptoms, such as headache or persistent loss of smell and taste, have also been documented in COVID-19 long-haulers. Moreover, long lasting fatigue, mild cognitive impairment and sleep disorders appear to be frequent long term neurological manifestations after hospitalization due to COVID-19. Less is known in relation to peripheral nerve injury related to Sars-CoV-2 infection. Case presentation We report the case of a 47-year-old female presenting with a unilateral chest pain radiating to the left arm lasting for more than two months after recovery from Sars-CoV-2 infection. After referral to our post-acute outpatient service for COVID-19 long haulers, she was diagnosed with a unilateral, atypical, pure sensory brachial plexus neuritis potentially related to COVID-19, which occurred during the acute phase of a mild Sars-CoV-2 infection and persisted for months after resolution of the infection. Conclusions We presented a case of atypical Parsonage-Turner syndrome potentially triggered by Sars-CoV-2 infection, with symptoms and repercussion lasting after viral clearance. A direct involvement of the virus remains uncertain, and the physiopathology is unclear. The treatment of COVID-19 and its long-term consequences represents a relatively new challenge for clinicians and health care providers. A multidisciplinary approach to following-up COVID-19 survivors is strongly advised