1,721,094 research outputs found
Il valore aggiunto della limnologia comparata: un confronto tra laghi delle Terre Alte
Full text linkAssodato che il cambiamento climatico è in corso, molte sono ancora le incertezze sulla conseguente risposta da parte degli ecosistemi, in particolare di quelli acquatici. Come emerso sia dall’analisi delle serie storiche di dati, sia da indagini paleolimnologiche, questi ambienti, a differenza di quelli terrestri, presentano dei meccanismi di riposta più complessi, spesso non lineari, o no riconducibili ad una semplice relazione causa-effetto.
Sono qui discussi esempi o casi di studio che evidenziano come le comunità biologiche che vivono in ambienti acquatici abbiamo strutture peculiari e come queste caratteristiche siano rispondano agli impatti climatici.
Per valutare in modo appropriato quale sarà l’evoluzione di questi ecosistemi nel prossimo futuro è necessario aumentare la conoscenza di questi ambienti su scala sia spaziale sia temporale, in modo da poter discriminare il contributo di fattori locali o globali, antropici o naturali. In questo contesto gli ambienti acquatici delle Terra Alte possono dare un contributo significativo alla comprensione degli impatti del clima sugli ecosistemi acquatici
Platone. Fedone Introd., prem. al testo e note di A. Lami; traduzione italiana di P. Fabrini
No full textSTIMULATED ELECTRON-ION (ELECTRON-ATOM) RECOMBINATION AT A RESONANCE
No full textLAMI A, RAHMAN NK, Faisal F. STIMULATED ELECTRON-ION (ELECTRON-ATOM) RECOMBINATION AT A RESONANCE. PHYSICAL REVIEW A. 1984;30(5):2433-2440
PHOTON GAIN FROM STIMULATED ELECTRON-ION (ATOM) RECOMBINATION
No full textFaisal F, LAMI A, RAHMAN NK. PHOTON GAIN FROM STIMULATED ELECTRON-ION (ATOM) RECOMBINATION. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS. 1981;14(17):L569-L574
Deep lakes south of the Alps
Full text linkThe large subalpine lakes (Garda Iseo, Como, Lugano and Maggiore) concentrate around 80% of all Italian lake waters.
Due to their location at the Alpine margin in the most densely populated and productive region in Italy they play a
crucial socio-economic role as water resource for drinking, agriculture, industry, tourism, hydroelectric production,
biodiversity conservation. They are exposed to steadily increasing human impact and, as their catchments extend
into the glacial Alpine range, they are particularly exposed to global warming effects. Italian subalpine lakes share
many morphological, physical and ecological characteristics, which justify their inclusion as a separate typology in
the Italian LTER network. Despite these lakes have been extensively investigated since the early 20th Century, their
regular monitoring started only in the 1980s in relation to eutrophication issues, which still represents the major
cause of deterioration of these lakes.
Limnological surveys indicate a coherent response by subalpine lakes to the nutrient enrichment in the 1960s–1970s,
while the recent development is quite heterogeneous. Past and ongoing palaeolimnological studies confirmed the
pronounced coherence of the lakes’ secular evolution. Even after the end of the Little Ice Age and till the 1960s these
lakes were very oligotrophic and extremely inert toward climatic variability. The successive nutrient increase was
accompanied by the displacement of oligotraphentic by meso-to eutraphentic planktonic taxa (especially diatoms,
cyanobacteria, cladocera). As regards, for instance, the planktonic diatoms, the dominant small centric taxa were
partially substituted by colony-forming, pennate species. Ongoing palaeolimnological studies confirm the differences
in the recent evolution of the lakes within a secular perspective, which is partly due to locally differences in the
current lake management and restoration measures. However, the incomplete lake’s re-oligotrophication and return
to the original status is also hindered by superimposed effects of climate change, as outlined, for example, by the
coherent response of the subalpine lakes to the warm early 2000s. Current sediment studies are also contributing at
outlining the impact of hydroelectric exploitation on the lakes’ ecological evolution
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
Short-Term Efficacy and Safety of Non-Ablative Laser Treatment Alone or with Estriol or Moisturizers in Postmenopausal Women with Vulvovaginal Atrophy
No full textBackground: Among treatments for vulvo-vaginal atrophy (VVA), there is a new kind of energy-based device, the non-ablative CO2 laser. Aim: This study aimed to assess the efficacy and safety of the non-ablative CO2 laser in menopausal women with VVA as a monotherapy or in association with vaginal estriol or moisturizer. Methods: Seventy-five women with VVA received laser treatment (Laser group), laser plus estriol gel (Laser+E) or laser plus moisturizers (Laser+M). The study protocol consisted of 3 monthly laser sessions (t0, t1, t2) and a gynecological examination at baseline and 1 month after last laser treatment (t3). Objective measures included VHI (Vaginal Health Index) and VuHI (Vulvar Health Index); subjective symptoms of VVA (Dryness, Burning, Itching, Dysuria) evaluated via visual analog scales, sexual function evaluated by FSFI (Female Sexual Function Index), FSDS (Female Sexual Distress Score) and MENQOL (Mopause-specific Quality Of Life). Adverse events and discomfort encountered during the procedure were also assessed. Outcomes: Primary outcomes were the evaluation of VHI and VuHI and secondary outcomes were changes in VVA symptoms (VAS), sexual function (MENQOL, FSFI, FSDS) and discomfort during the procedure. Results: Seventy-five women (25 in Laser, 25 in Laser+E and 25 in Laser+M group) completed the study. At t3, mean VHI, VuHI, dryness, burning and itching VAS scores improved significantly with no differences between the groups. The lubrication domain of FSFI improved significantly only in the Laser+M group, while the pain domain improved significantly in all women with no differences between the groups. FSFI and FSDS overall scores and MENQOL sexual domain improved in all women with no significant difference between the groups. The mean score of the pain during the procedure was low at t0 and did not change throughout the study. Clinical implications: This study extends knowledge concerning the effectiveness of a new non-ablative CO2 laser in post-menopausal women with VVA. Strengths & limitations: This is one of the first studies on this kind of laser and is the first to compare the effectiveness of laser treatment alone or in combination with vaginal estriol or moisturizers. Parameters of VVA and sexual function were evaluated using validated tools. Study limitations include short follow-up time, the limited number of participants and the absence of a sham-controlled group. Conclusion: Non-ablative CO2 laser seems to be an effective treatment for VVA in menopausal women. Our preliminary data shows that it can be effective as monotherapy or with adjuvant treatments. Alvisi S, Lami A, Baldassarre M, et al. Short-Term Efficacy and Safety of Non-Ablative Laser Treatment Alone or with Estriol or Moisturizers in Postmenopausal Women with Vulvovaginal Atrophy. J Sex Med 2022;19:761–770
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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