Observation of Rayleigh-Lamb waves generated by the 2022 Hunga-Tonga volcanic eruption with the POLA detectors at Ny-Ålesund.

The eruption of the Hunga-Tonga volcano in the South Pacific Ocean on January 15, 2022, at about 4:15 UTC, generated a violent explosion, which created atmospheric pressure disturbances in the form of Rayleigh-Lamb waves detected all over the globe. Here we discuss the observation of the Hunga-Tonga shock-wave performed at the Ny-Ålesund Research Station on the Spitsbergen island, by the detectors of the PolarquEEEst experiment and their ancillary sensors. Online pressure data as well as the results of dedicated offline analysis are presented and discussed in details. Results include wave arrival times, wave amplitude measurements and wave velocity calculation. We observed five passages of the shock wave with a significance larger than 3 [Formula: see text] and an amplitude up to 1 hPa. The average propagation velocity resulted to be (308 ± 0.6) m/s. Possible effects of the atmospheric pressure variation associated with the shock-wave multiple passages on the cosmic-ray rate at ground level are also investigated. We did not find any significant evidence of this effect.

Cosmic-ray antinuclei as messengers of new physics: status and outlook for the new decade.

The precise measurement of cosmic-ray antinuclei serves as an important means for identifying the nature of dark matter and other new astrophysical phenomena, and could be used with other cosmic-ray species to understand cosmic-ray production and propagation in the Galaxy. For instance, low-energy antideuterons would provide a "smoking gun" signature of dark matter annihilation or decay, essentially free of astrophysical background. Studies in recent years have emphasized that models for cosmic-ray antideuterons must be considered together with the abundant cosmic antiprotons and any potential observation of antihelium. Therefore, a second dedicated Antideuteron Workshop was organized at UCLA in March 2019, bringing together a community of theorists and experimentalists to review the status of current observations of cosmic-ray antinuclei, the theoretical work towards understanding these signatures, and the potential of upcoming measurements to illuminate ongoing controversies. This review aims to synthesize this recent work and present implications for the upcoming decade of antinuclei observations and searches. This includes discussion of a possible dark matter signature in the AMS-02 antiproton spectrum, the most recent limits from BESS Polar-II on the cosmic antideuteron flux, and reports of candidate antihelium events by AMS-02; recent collider and cosmic-ray measurements relevant for antinuclei production models; the state of cosmic-ray transport models in light of AMS-02 and Voyager data; and the prospects for upcoming experiments, such as GAPS. This provides a roadmap for progress on cosmic antinuclei signatures of dark matter in the coming years.

Voltage breakdown follower avoids hard thermal constraints in a Geiger mode avalanche photodiode.

A novel approach to single-photon detection by means of an avalanche photodiode is described and preliminary results obtained by implementation of a prototype are reported. The electronic circuit (breakdown voltage follower) avoids the use of complex temperature controls typically used with these devices, thus reducing system complexity and cost. Data obtained without any thermoregulation show the same behavior with respect to systems thermoregulated to within a few hundredths of a degree celsius.

Serum NSE, CEA, CT, CA 15-3 levels in human lung cancer.

The significance of neuron specific enolase (NSE) was investigated in comparison with other tumor markers (CEA, CT, CA 15-3) used in the diagnosis and treatment monitoring of lung cancer. As previously described, the calcitonin assay proved to have very low sensitivity for small cell lung cancer (SCLC). The serum NSE assay was, however, shown to be a useful diagnostic aid for discrimination between histologically different lung cancers, and therefore this assay may be a valuable tool for treatment monitoring in SCLC patients. CA 15-3, also an unspecific marker, showed similar sensitivity to the NSE assay in SCLC patients, the sensitivity being higher than CEA in non small cell lung cancer (NSCLC).

Cisplatin and etoposide combination in the treatment of bronchogenic carcinoma.

The authors investigated the activity of a combination of DDP 80 mg/m2 i.v. followed by VP16 50 mg/m2 on days 2-5 in bronchogenic carcinoma. Twenty-seven patients entered the study (10 small cell carcinoma, 9 squamous cell, 2 adenocarcinomas and 6 histologically undefined). Six patients evidenced partial response (22.3%); one patient (small cell) had complete remission. The toxicity of the regimen was scarce and well-tolerated by patients with an incidence of 88.8% alopecia, and 77.7% nausea and/or vomiting.

[Diagnostic significance of assaying glycoproteins, immunoglobulins, complement fractions and carcinoembryonic antigen in pleural and peritoneal exudates and transudates]. / Il significato diagnostico del dosaggio delle glicoproteine, delle immunoglobuline, delle frazioni del complemento e dell'antigene carcino-embrionario (CEA) negli essudati e trasudati pleurici e peritoneali.

The Authors have determinated the concentration of some glicoproteins, IgG, IgA and IgM, C3 and C4 and CEA in 61 peritoneal and pleuric effusions, of various aethiology. Results obtained for glicoproteins and C3 appear to have a diagnostic value in distinguishing inflammatory and neoplastic effusions from non-inflammatory and non-neoplastic forms. A greater diagnostic value can be attributed to the results of the CEA which is constantly and almost exclusively increased in neoplastic effusions.

[Comparative analysis between qualitative and quantitative features of orofaringeal and tracheo-bronchial bacterial flora in normal subject (author's transl)]. / Analisi comparativa tra le caratteristiche qualitative e quantitative della flora batterica dell'orofaringe e dell'albero tracheobronchiale del soggetto normale

In 28 subjects surely without tracheo-bronchial phlogosis it had been observed that the trachea and the bronchi are mostly sterile, only rarely there is a normal bacterial flora. In the mouth and in the pharynx there is instead, almost always, normal bacterial flora and only exceptionally potentially pathogenous strains at a concentration inferior to 10(7).