cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Aria pesante sull’esopianeta? Te lo dice Harps-N
Creators: Ufficio stampa Inaf
Publisher: name: Media Inaf
Year: 2019

Scoperto da un team di ricercatori in gran parte dell'Inaf un nuovo effetto che l'atmosfera di un esopianeta molto caldo può indurre sulla misura della velocità radiale della stella madre durante il transito planetario. Tale effetto, individuato grazie alle osservazioni del Telescopio nazionale Galileo dell'Inaf, potrà permettere di rivelare in modo diretto la presenza di elementi pesanti come il ferro nelle atmosfere di altri pianeti extrasolari estremamente caldi
La porta delle comete
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2019

Studiando il particolare centauro 29P / Schwassmann-Wachmann 1, è stato scoperto il varco delle comete verso il Sistema solare interno. I centauri che attraversano questa regione, chiamata gateway, rappresentano la sorgente di oltre i due terzi di tutte le comete della famiglia di Giove. Tutti di dettagli della scoperta su The Astrophysical Journal Letters
Ionic liquid-Tween-20 based biocompatible microemulsion for the encapsulation of rifampicin
Creators: name: Patel, Rajan
name: Wani, Farooq Ahmad
name: Anand, Aashima
name: Sharma, Kajal
name: Bhat, Ab Raouf
name: Jawhari, Ahmed Hussain
name: Tasneem, Shadma
Publisher: name: Taylor & Francis
Year: 2025
Subjects: Space Science
Physical Sciences not elsewhere classified
Pharmacology
Biotechnology
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Computational Biology

description: Developing a universal drug delivery vehicle for sparingly soluble medications remains a challenge, with the most suited vehicles being ionic liquid and surfactant-based microemulsions. Microemulsions formed by two or more immiscible liquids stabilized by surfactants have been a subject of immense importance due to their potential applications in various fields. This study aimed to formulate a microemulsion, which comprises ionic liquid and surfactant, to investigate its potential toward the poorly water-soluble drug rifampicin. The formation and changes in the microstructure of IL-Tween-20 based microemulsion in the presence of a drug (rifampicin) have been established by using UV–visible, fluorescence, and FTIR spectroscopy. The hydrophobic optical/solvatochromic probes pyrene and p-nitroaniline have been used to observe the presence of ionic liquid-rich and bicontinuous microstructures. The incorporation of the drug into the microemulsion and its stability has been evaluated using pH and conductivity (σ) studies. In addition, the particle size analysis and optical microscopic images of the system help in understanding the presence of the drug in the structure of ionic liquid-in-water microemulsion. Lastly, the probes used can be valuable in locating the position of rifampicin, loaded in microemulsion.
Brachypodium phoenicoides
Creators: name: Cardona, Àngel Manuel Hernández
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Poales
Poaceae
Brachypodium
Brachypodium phoenicoides

description: Brachypodium phoenicoides (L.) Roem. et Schult.
(fenàs de marge). Propi de la regió mediterrània occidental i central. Forma prats mesoxeròfils (mitjanament secs), anomenats fenassars, i també prospera en marges de camps i camins. Abunda a les zones mitjanes i altes.
description: Published as part of Cardona, Àngel Manuel Hernández, 2022, Catàleg actualitzat i claus d'identificació de les gramínies de Sant Llorenç del Munt i l'Obac (Barcelona), pp. 64-86 in Nemus 12 on page 68, DOI: 10.5281/zenodo.12170499
Trafitta da un lampo radio, ed è subito luce
Creators: Redazione Eso
Publisher: name: Media Inaf
Year: 2019

Gli astronomi che utilizzano il Very Large Telescope dell’Eso hanno osservato per la prima volta un lampo radio veloce attraverso un alone galattico. L’enigmatica esplosione di onde radio cosmiche è passata quasi indisturbata, suggerendo che l'alone abbia una densità sorprendentemente bassa e un campo magnetico debole.
Agathidium atronitens Fall 1934
Creators: name: Majka, Christopher
name: Langor, David
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Leiodidae
Agathidium
Agathidium atronitens

description: Agathidium atronitens Fall, 1934 NEW BRUNSWICK: Kent Co.: Kouchibouguac National Park, 20.IX.1977, J.M. Campbell and A. Smetana, (6, CNC); Kouchibouguac National Park, 21.IX.1977, J.M. Campbell, (1, CNC). NOVA SCOTIA: Inverness Co.: MacKenzies Mountain, 25.VI.1983, Y. Bousquet, pan trap, (1, CNC). Agathidium atronitens is newly recorded in New Brunswick, Nova Scotia, and Atlantic Canada (Fig. 6). It was recorded from both deciduous and coniferous forests. There is a single host record from Trametes versicolor (Fr.) Pil. (Polyporaceae) (Miller and Wheeler 2005).
description: Published as part of Majka, Christopher & Langor, David, 2008, The Leiodidae (Coleoptera) of Atlantic Canada: new records, faunal composition, and zoogeography, pp. 357-402 in ZooKeys 2 (2) on page 376, DOI: 10.3897/zookeys.2.56, http://zenodo.org/record/576397
description: {"references": ["Wheeler QD, Miller KB (2005) Slime-mold beetles of the genus Agathidium Panzer in North and Central America, Part I. Coleoptera: Leiodidae. Bulletin of the American Museum of Natural History 290: 1 - 95."]}
title: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ° ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ð¸ ÑÐ±Ð¾ÑÐºÐ¸ Ð¸ ÑÐ²Ð°ÑÐºÐ¸ ÐºÐ¾Ð»Ð¾Ð½Ð½Ñ Ð-7
title: Ð´Ð¸Ð¿Ð»Ð¾Ð¼Ð½ÑÐ¹ Ð¿ÑÐ¾ÐµÐºÑ
titleType: Subtitle
Creators: name: Ð¢Ð°Ð¼Ð±Ð¾Ð²ÑÐµÐ², ÐÐ°Ð´Ð¸Ð¼
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2016
Subjects: ÑÐµÐ±ÐµÑÑÐ¾Ð¸Ð¼Ð¾ÑÑÑ
ÑÑÑÐ½Ð°Ñ Ð´ÑÐ³Ð¾Ð²Ð°Ñ ÑÐ²Ð°ÑÐºÐ°
ÐºÐ¾Ð½ÑÑÐ¾Ð»Ñ ÐºÐ°ÑÐµÑÑÐ²Ð°
ÑÐµÑ Ð½Ð¸ÐºÐ° Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸

description: Ð Ð´Ð¸Ð¿Ð»Ð¾Ð¼Ð½Ð¾Ð¼ Ð¿ÑÐ¾ÐµÐºÑÐµ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð° ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ñ ÑÐ±Ð¾ÑÐºÐ¸, ÑÐ²Ð°ÑÐºÐ¸ Ð¸ ÐºÐ¾Ð½ÑÑÐ¾Ð»Ñ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¸ "ÐÐ¾Ð»Ð¾Ð½Ð½Ð° Ð-7". ÐÐ·Ð´ÐµÐ»Ð¸Ðµ Ð¸Ð·Ð³Ð¾ÑÐ°Ð²Ð»Ð¸Ð²Ð°ÐµÑÑÑ Ð¸Ð· Ð½Ð¸Ð·ÐºÐ¾ÑÐ³Ð»ÐµÑÐ¾Ð´Ð¸ÑÑÐ¾Ð¹ Ð¸ Ð½Ð¸Ð·ÐºÐ¾Ð»ÐµÐ³Ð¸ÑÐ¾Ð²Ð°Ð½Ð½Ð¾Ð¹ ÑÑÐ°Ð»Ð¸ 09Ð2Ð¡. Ð ÑÐ°Ð±Ð¾ÑÐµ ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÐµÑÑÑ Ð´Ð²Ð° Ð²Ð°ÑÐ¸Ð°Ð½ÑÐ° ÑÐµÑ-Ð½Ð¾Ð»Ð¾Ð³Ð¸Ð¸: Ñ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸ÐµÐ¼ ÑÑÑÐ½Ð¾Ð¹ Ð´ÑÐ³Ð¾Ð²Ð¾Ð¹ ÑÐ²Ð°ÑÐºÐ¸ Ð¿Ð¾ÐºÑÑÑÑÐ¼Ð¸ ÑÐ»ÐµÐºÑÑÐ¾Ð´Ð°Ð¼Ð¸ Ð¸ Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÑÐ²Ð°ÑÐºÐ¸ Ð¿Ð¾Ð´ ÑÐ»ÑÑÐ¾Ð¼. ÐÐ»Ñ ÐºÐ°Ð¶Ð´Ð¾Ð³Ð¾ Ð²Ð°ÑÐ¸Ð°Ð½ÑÐ° Ð¿Ð¾Ð´Ð¾Ð±ÑÐ°Ð½Ñ ÑÐµÐ¶Ð¸Ð¼Ñ ÑÐ²Ð°ÑÐºÐ¸, Ð²ÑÐ¿Ð¾Ð¼Ð¾Ð³Ð°ÑÐµÐ»ÑÐ½Ð¾Ðµ, ÑÐ²Ð°ÑÐ¾ÑÐ½ÑÐµ Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ñ; Ð¾ÑÐµÐ½ÐµÐ½Ñ Ð¼ÐµÑÐ°Ð½Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐ²Ð¾Ð¹ÑÑÐ²Ð° ÑÐ²Ð°ÑÐ½Ð¾Ð³Ð¾ ÑÐ¾ÐµÐ´Ð¸Ð½ÐµÐ½Ð¸Ñ; Ð¾Ð¿Ð¸ÑÐ°Ð½Ð° Ð¿Ð¾ÑÐ»ÐµÐ´Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½Ð¾ÑÑÑ ÑÐ±Ð¾ÑÐºÐ¸ Ð¸ ÑÐ²Ð°ÑÐºÐ¸; Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½Ñ Ð¼ÐµÑÐ¾Ð´Ñ ÐºÐ¾Ð½ÑÑÐ¾Ð»Ñ ÐºÐ°ÑÐµÑÑÐ²Ð°; ÑÐ°ÑÑÑÐ¸ÑÐ°Ð½ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÑÑÐµÐºÑ Ð¿ÑÐ¸ ÑÑÐ»Ð¾Ð²Ð¸Ð¸ ÑÐµÑÐ¸Ð¹Ð½Ð¾ÑÑÐ¸ Ð¸Ð·Ð³Ð¾ÑÐ¾Ð²Ð»ÐµÐ½Ð¸Ñ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¸.
Phase Reversal Diffraction in incoherent light
Creators: name: Zhang, Su-Heng
name: Gan, Shu
name: Cao, De-Zhong
name: Xiong, Jun
name: Zhang, Xiangdong
name: Wang, Kaige
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Phase reversal occurs in the propagation of an electromagnetic wave in a negatively refracting medium or a phase-conjugate interface. Here we report the experimental observation of phase reversal diffraction without the above devices. Our experimental results and theoretical analysis demonstrate that phase reversal diffraction can be formed through the first-order field correlation of chaotic light. The experimental realization is similar to phase reversal behavior in negatively refracting media.
description: 8 pages, 5 figures
Gj 3512b, l’esopianeta che sfida le teorie
Creators: Giuseppe Fiasconaro
Publisher: name: Media Inaf
Year: 2019

Un gigantesco esopianeta simile a Giove in una posizione improbabile, quantomeno secondo il modello di formazione planetaria più accettato. È  la scoperta fatta da un team di scienziati analizzando i dati della survey Carmenes. Tra i coautori dell'articolo, pubblicato oggi sulla rivista Science, c'è anche Luigi Mancini, dell’Università di Roma Tor Vergata e associato Inaf. Lo abbiamo intervistato
Insuring against droughts: addressing issues of trust, transparency and liquidity in the demand for livestock index insurance
Creators: name: Linhoff, Maike
name: Mußhoff, Oliver
name: Parlasca, Martin C.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Science Policy

description: Pastoralists in sub-Saharan Africa are particularly vulnerable to changing climatic conditions and heavily affected by an increasing frequency of severe droughts. To increase drought resilience, livestock index insurance constitutes a promising tool that is aligned to mitigate covariate risks. Uptake rates for these products are, however, relatively low. This article uses choice-experimental data collected in Northern Kenya to analyse preferences for hypothetical livestock index insurance contracts among pastoralists. Results show that pastoralists prefer lower strike levels as well as transparency in the form of regular radio announcements and text messages informing the policyholder about the location-specific index readings. Highly valued are trust enhancing features such as an index certification. We do not find any indication that the option to split the premium payment into two instalments as a way to relax potential liquidity constraints could lead to higher demand.
Festa ad Arcetri per i 150 anni dell’Osservatorio
Creators: Rossella Spiga
Publisher: name: Media Inaf
Year: 2019

Oggi, giovedì 26 settembre 2019, l’Osservatorio astrofisico di Arcetri, a Firenze, una delle sedici sedi dell’Istituto nazionale di astrofisica, celebra i suoi primi 150 anni di storia, di scienza e di sviluppo di strumentazione astronomica
title: ÐÐ´Ð°Ð½Ð¸Ðµ ÑÐºÐ¾Ð»Ñ Ð½Ð° 700 ÑÑÐ°ÑÐ¸Ñ ÑÑ
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: Ð¡ÐµÐ½ÑÐ¾Ð², ÐÐ³Ð¾ÑÑ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2017
Subjects: Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
Ð¾Ð±ÑÐµÐ¼Ð½Ð¾-Ð¿Ð»Ð°Ð½Ð¸ÑÐ¾Ð²Ð¾ÑÐ½ÑÐµ ÑÐµÑÐµÐ½Ð¸Ñ
ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð²Ð½ÑÐµ ÑÐµÑÐµÐ½Ð¸Ñ

description: Ð Ð´Ð¸Ð¿Ð»Ð¾Ð¼Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð² ÑÐ¾Ð¾ÑÐ²ÐµÑÑÑÐ²Ð¸Ð¸ Ñ Ð·Ð°Ð´Ð°Ð½Ð¸ÐµÐ¼ Ð½Ð° Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½ Ð¿ÑÐ¾ÐµÐºÑ Ð¾Ð±ÑÐµÐ¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½Ð¾Ð¹ ÑÐºÐ¾Ð»Ñ Ð½Ð° 700 ÑÑÐ°ÑÐ¸ÑÑÑ. Ð ÑÐ¾Ð´Ðµ Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ñ ÑÐ°Ð·Ð´ÐµÐ»Ñ Ð¾Ð±ÑÐ°Ñ Ð¿Ð¾ÑÑÐ½Ð¸ÑÐµÐ»ÑÐ½Ð°Ñ Ð·Ð°Ð¿Ð¸ÑÐºÐ°, ÑÑÐµÐ¼Ð° Ð¿Ð»Ð°Ð½Ð¸ÑÐ¾Ð²Ð¾ÑÐ½Ð¾Ð¹ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð·ÐµÐ¼ÐµÐ»ÑÐ½Ð¾Ð³Ð¾ ÑÑÐ°ÑÑÐºÐ°, Ð°ÑÑÐ¸ÑÐµÐºÑÑÑÐ½ÑÐµ Ð¸ Ð¾Ð±ÑÐµÐ¼Ð½Ð¾-Ð¿Ð»Ð°Ð½Ð¸ÑÐ¾Ð²Ð¾ÑÐ½ÑÐµ ÑÐµÑÐµÐ½Ð¸Ñ, ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð²Ð½ÑÐµ ÑÐµÑÐµÐ½Ð¸Ñ, ÑÐ²ÐµÐ´ÐµÐ½Ð¸Ñ Ð¾Ð± Ð¸Ð½Ð¶ÐµÐ½ÐµÑÐ½Ð¾Ð¼ Ð¾Ð±Ð¾ÑÑÐ´Ð¾Ð²Ð°Ð½Ð¸Ð¸, Ð¿ÑÐ¾ÐµÐºÑ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸ ÑÑÑÐ¾Ð¸ÑÐµÐ»ÑÑÑÐ²Ð°, Ð¾ÑÑÐ°Ð½Ð° Ð¾ÐºÑÑÐ¶Ð°ÑÑÐµÐ¹ ÑÑÐµÐ´Ñ. Ð¡Ð´ÐµÐ»Ð°Ð½Ñ ÑÐ°ÑÑÐµÑÑ ÑÑÑÐ¾Ð¸ÑÐµÐ»ÑÐ½ÑÑ ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ð¹ Ð·Ð´Ð°Ð½Ð¸Ñ, ÑÐºÐ¾Ð»Ñ, Ð° ÑÐ°ÐºÐ¶Ðµ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½ ÑÐ°ÑÑÐµÑ Ð¸ Ð¿ÑÐ¾ÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¼ÐµÑÐ°Ð»Ð»Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ ÐºÐ°ÑÐºÐ°ÑÐ° ÑÐ¿Ð¾ÑÑÐ¸Ð²Ð½Ð¾Ð³Ð¾ Ð·Ð°Ð»Ð°. ÐÑÐ¾ÐµÐºÑÐ¾Ð¼ Ð¿ÑÐµÐ´ÑÑÐ¼Ð¾ÑÑÐµÐ½Ð¾ ÑÑÐ½ÐºÑÐ¸Ð¾Ð½Ð°Ð»ÑÐ½Ð¾Ðµ Ð·Ð¾Ð½Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ ÑÐµÑÑÐ¸ÑÐ¾ÑÐ¸Ð¸ Ð¸ Ð¿Ð¾Ð¼ÐµÑÐµÐ½Ð¸Ð¹ Ð·Ð´Ð°Ð½Ð¸Ñ ÑÐºÐ¾Ð»Ñ. ÐÑÐµ Ð¿Ð¾Ð¼ÐµÑÐµÐ½Ð¸Ñ Ð¾Ð±ÑÐµÐ´Ð¸Ð½ÐµÐ½Ñ Ð² ÑÑÐ½ÐºÑÐ¸Ð¾Ð½Ð°Ð»ÑÐ½ÑÐµ Ð³ÑÑÐ¿Ð¿Ñ. ÐÐ»Ñ ÐºÐ»Ð°ÑÑÐ¾Ð² ÑÐ°ÑÑÑÐ¸ÑÐ°Ð½, ÐºÐ¾ÑÑÑÐ¸ÑÐ¸ÐµÐ½Ñ ÐµÑÑÐµÑÑÐ²ÐµÐ½Ð½Ð¾Ð³Ð¾ Ð¾ÑÐ²ÐµÑÐµÐ½Ð¸Ñ. ÐÑÐ¾ÐµÐºÑ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½ Ð² ÑÐ¾Ð¾ÑÐ²ÐµÑÑÑÐ²Ð¸Ðµ Ð´ÐµÐ¹ÑÑÐ²ÑÑÑÐ¸Ð¼Ð¸ Ð½Ð¾ÑÐ¼Ð°ÑÐ¸Ð²Ð°Ð¼Ð¸.
Agathidium depressum Fall 1934
Creators: name: Majka, Christopher
name: Langor, David
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Leiodidae
Agathidium
Agathidium depressum

description: Agathidium depressum Fall, 1934 NOVA SCOTIA: Victoria Co.: Still Brook, Cape Breton Highlands National Park, 5.VII.1983, L. LeSage, temporary stream in spruce forest, (1, CNC). Agathidium depressum is newly recorded in Nova Scotia and in Atlantic Canada (Fig. 6). It was collected from a variety of litter sources including rotten logs and pine duff. In Alaska, it was collected on the slime molds (myxomycetes) Stemonitis fusca Roth and Badhamia sp. (Wheeler and Miller 2005).
description: Published as part of Majka, Christopher & Langor, David, 2008, The Leiodidae (Coleoptera) of Atlantic Canada: new records, faunal composition, and zoogeography, pp. 357-402 in ZooKeys 2 (2) on page 377, DOI: 10.3897/zookeys.2.56, http://zenodo.org/record/576397
description: {"references": ["Wheeler QD, Miller KB (2005) Slime-mold beetles of the genus Agathidium Panzer in North and Central America, Part I. Coleoptera: Leiodidae. Bulletin of the American Museum of Natural History 290: 1 - 95."]}
Il triangolo dei super buchi neri
Creators: Stefano Parisini
Publisher: name: Media Inaf
Year: 2019

Benché sia un fenomeno estremamente raro, la fusione di tre buchi neri supermassicci rappresenta un “salto evolutivo” rispetto a quella di una semplice coppia, perché la spinta aggiuntiva fornita dal terzo elemento potrebbe essere fondamentale per unire definitivamente i primi due. Una nuova ricerca ha ora individuato, con un metodo collaborativo, la migliore evidenza di una tripletta di tali mostri galattici
Kolmogorov scaling and intermittency in Rayleigh-Taylor turbulence
Creators: name: Boffetta, G.
name: Mazzino, A.
name: Musacchio, S.
name: Vozella, L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The Rayleigh--Taylor (RT) turbulence is investigated by means of high resolution numerical simulations. The main question addressed here is on whether RT phenomenology can be considered as a manifestation of universality of Navier--Stokes equations with respect to forcing mechanisms. At a theoretical level the situation is far from being firmly established and, indeed, contrasting predictions have been formulated. Our first aim here is to clarify the above controversy through a deep analysis of scaling behavior of relevant statistical observables. The effects of intermittency on the mean field scaling predictions is also discussed.
description: 4 pages, 5 figures
Particle Production in the Early Universe
Creators: name: Domcke, Valerie Fiona
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2019

description: GRAPPA Seminar, GRAPPA, Amsterdam, 2 May 2019
description: The paradigm of cosmic inflation explains our observations of the cosmic microwave background spectacularly well. To proceed in the quest of pinning down the particle physics model behind this very early phase of the Universe, multi-wavelength observations of the power spectra of the anisotropies generated during cosmic inflation are crucial. If the inflaton is a pseudo-Goldstone boson (a possible explanation for the required flatness of the inflaton potential), the couplings of this inflaton to the Standard Model may provide a window to probe inflation over a very wide range scales: as I will argue in this talk, different plausible couplings to gauge fields and fermions lead to unique signatures in the scalar and tensor power spectra at small scales. I will discuss possibilities to probe these scales, with a special focus on gravitational wave observatories.
Scoperto un ammasso insolitamente depresso
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2019

Usando i dati del telescopio spaziale Swift, un team di ricercatori guidato da Stefano Andreon dell’Inaf di Milano ha individuato, a circa 800 milioni di anni luce da noi, un ammasso di galassie dal profilo insolito: nelle regioni centrali contiene molta meno massa del previsto
Networking for gender equitable climate-smart agriculture
Creators: name: Friedman, Rachel S
name: Mackenzie, Ellis
name: Sloan, Tom
name: Sweaney, Nicole
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: Climate change presents a grave and growing threat to the productivity and resilience of smallholder farming systems, impacts on which are already being felt in Pacific Island nations. Climate information plays a critical role in adaptation to these threats. Yet its accessibility and use may differ dramatically between groups of farmers, highlighting the need to understand the different paths of information exchange within communities. In this study, we examined weather and climate information sharing networks of both male and female farmers, and their perceived barriers to information access and use through a survey in three provinces in Papua New Guinea. The results provided insights about the most prominent actors as well as information sharing relationships, highlighting key gender differences. Women demonstrated stronger information connectivity with family and friends, capitalizing on close-knit networks. Conversely, the men’s network showed the potential to bridge between external information sources like media, and community leaders, church groups, and friends and family. To ensure equitable communication and use of information for climate adaptation, it is important to strike a balance between the strong bonding and open exchange aspects of the network, and consider the central sources and perceived hurdles affecting access and use of this information.
Precision high voltage divider for the KATRIN experiment
Creators: name: Thümmler, Th.
name: Marx, R.
name: Weinheimer, Ch.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The Karlsruhe Tritium Neutrino Experiment (KATRIN) aims to determine the absolute mass of the electron antineutrino from a precise measurement of the tritium beta-spectrum near its endpoint at 18.6 keV with a sensitivity of 0.2 eV. KATRIN uses an electrostatic retardation spectrometer of MAC-E filter type for which it is crucial to monitor high voltages of up to 35 kV with a precision and long-term stability at the ppm level. Since devices capable of this precision are not commercially available, a new high voltage divider for direct voltages of up to 35 kV has been designed, following the new concept of the standard divider for direct voltages of up to 100 kV developed at the Physikalisch-Technische Bundesanstalt (PTB). The electrical and mechanical design of the divider, the screening procedure for the selection of the precision resistors, and the results of the investigation and calibration at PTB are reported here. During the latter, uncertainties at the low ppm level have been deduced for the new divider, thus qualifying it for the precision measurements of the KATRIN experiment.
description: 22 pages, 12 figures
title: ÐÐ½Ð°Ð»Ð¸Ð· ÑÐ¸ÑÑÐµÐ¼Ñ Ð²Ð¸Ð´ÐµÐ¾Ð½Ð°Ð±Ð»ÑÐ´ÐµÐ½Ð¸Ñ ÐºÐ°Ðº ÑÐ»ÐµÐ¼ÐµÐ½ÑÐ° ÑÐ¸ÑÑÐµÐ¼Ñ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ ooo Â«ÑÐ¸ÑÑÐ°Ð»- ÑÐµÑÐ²Ð¸ÑÂ»
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: ÐÐ¾Ð²Ð°Ð»ÐµÐ²Ð°, ÐÐ»ÐµÐ½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2017
Subjects: Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÑ
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description: ÐÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð°Ð½Ð°Ð»Ð¸Ð·Ñ ÑÐ¸ÑÑÐµÐ¼Ñ Ð·Ð°ÑÐ¸ÑÑ ÐÐÐ Â«Ð¦Ð¸ÑÑÐ°Ð»-Ð¡ÐµÑÐ²Ð¸ÑÂ» Ð³. Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³Ð° Ð¸ ÐµÑ ÑÐ¾Ð²ÐµÑÑÐµÐ½ÑÑÐ²Ð¾Ð²Ð°Ð½Ð¸Ñ. Ð ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¸Ð·Ð»Ð¾Ð¶ÐµÐ½Ñ ÑÐµÐ¾ÑÐµÑÐ¸ÑÐµÑÐºÐ¸Ðµ Ð¸ Ð¿ÑÐ°Ð²Ð¾Ð²ÑÐµ Ð¾ÑÐ½Ð¾Ð²Ñ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ¸ ÑÐ¸ÑÑÐµÐ¼ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ð¾ ÑÐ¾Ð²ÑÐµÐ¼ÐµÐ½Ð½Ð¾Ðµ ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ðµ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ ÐÐÐ Â«Ð¦Ð¸ÑÑÐ°Ð» Ð¡ÐµÑÐ²Ð¸ÑÂ». Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ð¾ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð½Ð¾Ðµ Ð¸ ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¾Ðµ Ð¾Ð±ÐµÑÐ¿ÐµÑÐµÐ½Ð¸Ðµ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ. Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð° ÑÐ¸ÑÑÐµÐ¼Ð° Ð²Ð¸Ð´ÐµÐ¾Ð½Ð°Ð±Ð»ÑÐ´ÐµÐ½Ð¸Ñ Ð´Ð»Ñ ÐÐÐ Â«Ð¦Ð¸ÑÑÐ°Ð» Ð¡ÐµÑÐ²Ð¸ÑÂ».
Agathidium fawcettae Miller and Wheeler 2005
Creators: name: Majka, Christopher
name: Langor, David
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Leiodidae
Agathidium
Agathidium fawcettae

description: Agathidium fawcettae Miller and Wheeler, 2005 NEW BRUNSWICK: Northumberland Co.: Tabusintac, 19.VI.1939, 20.VI.1939, W.J. Brown, (2, CNC); York Co.: Fredericton, 2.VII.1928, W.J. Brown, (1, CNC); Westmorland Co.: Shediac, 4.VII, 1939, W.J. Brown, (1, CNC). NOVA SCOTIA: One hundred and forty specimens were examined from Annapolis, Colchester, Cumberland, Guysborough, Halifax, Inverness, Lunenburg, Pictou, Queens, Victoria, and Yarmouth counties. The earliest record is from 1929 (Colchester Co.: Portapique, 25.VIII.1929, C.A. Frost, (1, CNC)). Agathidium fawcettae is newly recorded in New Brunswick. It was reported from Nova Scotia by Miller and Wheeler (2005) (Fig. 6). It was collected throughout the year in coniferous and deciduous forests from a wide variety of litter types. In Nova Scotia, it was found in variously aged deciduous forests (red maple, red oak, birch), in coniferous forests (red spruce, black spruce, hemlock, balsam fir), and in mixed and coastal forests. It was collected with flight-intercept traps, pitfall traps, and by hand collecting. There is one record from leaf litter, and one specimen found in a decomposing red spruce log. Recorded hosts include the slime molds Fulgio septica (L.) Wigg., Physarum viride (Bull.) Pers., Leocarpus fragilis (Dicks.) Rost., Hemitrichia clavata (Pers.) Rostaf., and Badhamia sp. (Miller and Wheeler 2005). Prior to the description of this species, several specimens in this series had been identified as Agathidium exiguum Melsheimer. These two species can only be reliably separated on the basis of the features of male genitalia. All the males examined and micro-dissected as part of this study proved to be A. fawcettae. Accordingly, the present authors conclude that there is no evidence that A. exiguum occurs in the region. Miller and Wheeler (2005) reported A. exiguum in North America east to Ontario and north to New Hampshire.
description: Published as part of Majka, Christopher & Langor, David, 2008, The Leiodidae (Coleoptera) of Atlantic Canada: new records, faunal composition, and zoogeography, pp. 357-402 in ZooKeys 2 (2) on page 378, DOI: 10.3897/zookeys.2.56, http://zenodo.org/record/576397
description: {"references": ["Wheeler QD, Miller KB (2005) Slime-mold beetles of the genus Agathidium Panzer in North and Central America, Part I. Coleoptera: Leiodidae. Bulletin of the American Museum of Natural History 290: 1 - 95."]}
Ecco ExaNeSt, il supercomputer “green”
Creators: Francesca Aloisio
Publisher: name: Media Inaf
Year: 2019

Testato con successo il precursore di un calcolatore elettronico ad elevate prestazioni tutto “made in Europe” che consuma fino a un decimo dell’energia richiesta dalle analoghe piattaforme di calcolo oggi operative. L’Italia è coinvolta nel progetto con l’Istituto nazionale di astrofisica e l’Istituto nazionale di fisica nucleare
Testing and simulation for fatigue master curve generation and small debris and acoustic wear testing at Fraunhofer
Creators: name: Kaulfersch, Eberhard
Publisher: name: Zenodo
Year: 2021
Subjects: fatigue, debris impact, high sound power testing

description: In this presentation the following three topics are presented: Fatigue evaluation methodology for (CROR facing) surface structures. Debris impact testing on coupons and analysis of failure High sound pressure acoustic testing on coupon level
Supersymmetric Wilson loops in N=4 SYM and pure spinors
Creators: name: Dymarsky, Anatoly
name: Pestun, Vasily
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study supersymmetric Wilson loop operators in four-dimensional N=4 super Yang-Mills theory. We show that the contour of a supersymmetric Wilson loop is either an orbit of some conformal transformation of the space-time (case I), or an arbitrary contour in the subspace where local superalgebra generator is a pure spinor (case II). In the more interesting case II we find and classify all pairs (Q,W) of the supercharges and the corresponding operators modulo the action of the global symmetry group.
description: 46 pages
title: ÐÑÑÑÐ¿Ð¸ÑÐµÐ»ÑÐ½ÑÐµ Ð¸ÑÐ¿ÑÑÐ°Ð½Ð¸Ñ Ð´Ð»Ñ Ð¸Ð½Ð¾ÑÑÑÐ°Ð½Ð½ÑÑ Ð°Ð±Ð¸ÑÑÑÐ¸ÐµÐ½ÑÐ¾Ð² Ð² Ð´Ð¸ÑÑÐ°Ð½ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¼ ÑÐ¾ÑÐ¼Ð°ÑÐµ: Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ñ Ð¸ ÑÐ¿Ð¾ÑÐ¾Ð±Ñ Ð¸Ñ ÑÐµÑÐµÐ½Ð¸Ñ
title: Entrance tests for foreign applicants in remote format: problems and methods of their solution
Creators: name: ÐÐ¾Ð²Ð¸ÐºÐ¾Ð²Ð°, ÐÐ»ÑÐ³Ð°
name: ÐÐµÐ»Ð»ÐµÑ, ÐÐ°ÐºÑÐ¸Ð¼
name: "ÐÐ½Ð¾ÑÑÑÐ°Ð½Ð½ÑÐµ ÑÑÑÐ´ÐµÐ½ÑÑ Ð² Ð²ÑÐ·Ð°Ñ  Ð Ð¤: ÑÑÑÐ°ÑÐµÐ³Ð¸Ð¸ Ð¿ÑÐ¸Ð²Ð»ÐµÑÐµÐ½Ð¸Ñ, Ð¿ÑÐ¸ÐµÐ¼Ð° Ð¸ Ð°Ð´Ð°Ð¿ÑÐ°ÑÐ¸Ð¸", Ð½Ð°ÑÑÐ½Ð¾-Ð¿ÑÐ°ÐºÑÐ¸ÑÐµÑÐºÐ°Ñ ÐºÐ¾Ð½ÑÐµÑÐµÐ½ÑÐ¸Ñ Ñ Ð¼ÐµÐ¶Ð´ÑÐ½Ð°ÑÐ¾Ð´Ð½ÑÐ¼ ÑÑÐ°ÑÑÐ¸ÐµÐ¼ (2021; Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³)
Publisher: name: ÐÐÐÐÐ¢ÐÐ¥-ÐÐ ÐÐ¡Ð¡
Year: 2021
Subjects: Ð¸Ð½Ð¾ÑÑÑÐ°Ð½Ð½ÑÐµ Ð°Ð±Ð¸ÑÑÑÐ¸ÐµÐ½ÑÑ
Ð²ÑÑÑÐ¿Ð¸ÑÐµÐ»ÑÐ½ÑÐµ Ð¸ÑÐ¿ÑÑÐ°Ð½Ð¸Ñ
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Ð¿ÑÐ¾ÐºÑÐ¾ÑÐ¸Ð½Ð³

description: Ð ÑÑÐ°ÑÑÐµ Ð°Ð½Ð°Ð»Ð¸Ð·Ð¸ÑÑÑÑÑÑ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ñ Ð¾ÑÐ³Ð°Ð½Ð¸Ð·Ð°ÑÐ¸Ð¸ Ð¸ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¸Ñ Ð²ÑÑÑÐ¿Ð¸ÑÐµÐ»ÑÐ½ÑÑ Ð¸ÑÐ¿ÑÑÐ°Ð½Ð¸Ð¹ Ð´Ð»Ñ Ð¸Ð½Ð¾ÑÑÑÐ°Ð½Ð½ÑÑ Ð°Ð±Ð¸ÑÑÑÐ¸ÐµÐ½ÑÐ¾Ð². ÐÐ²ÑÐ¾ÑÑ Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÑÑÑ Ð¿ÑÐ¸Ð½ÑÐ¸Ð¿Ñ ÑÐ¾ÑÐ¼Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ¾Ð´ÐµÑÐ¶Ð°Ð½Ð¸Ñ ÐºÐ¾Ð½ÑÑÐ¾Ð»ÑÐ½ÑÑ
Ð¼Ð°ÑÐµÑÐ¸Ð°Ð»Ð¾Ð², Ð¼ÐµÑÐ¾Ð´Ð¸ÐºÐ¸ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¸Ñ Ð¸ÑÐ¿ÑÑÐ°Ð½Ð¸Ð¹ Ð² ÑÐµÐ¶Ð¸Ð¼Ðµ Ð¾Ð½Ð»Ð°Ð¹Ð½ Ð¸ ÑÐ¾Ð¾ÑÐ²ÐµÑÑÑÐ²ÑÑÑÐ¸Ðµ ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐµÑÐµÐ½Ð¸Ñ, ÑÑÐ¸ÑÑÐ²Ð°ÑÑÐ¸Ðµ ÑÐ¿ÐµÑÐ¸ÑÐ¸ÐºÑ Ð°Ð±Ð¸ÑÑÑÐ¸ÐµÐ½ÑÐ¾Ð² Ð² ÑÐ°Ð·Ð½ÑÑ ÑÑÑÐ°Ð½Ð°Ñ.
description: The article analyzes the problems of organizing and conducting entrance examinations for foreign applicants. The authors present the principles
of forming the content of control materials, methods of conducting tests online and the corresponding technical solutions, taking into account the specifics of applicants in different countries.
Agathidium hatchi Wheeler 1977
Creators: name: Majka, Christopher
name: Langor, David
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Leiodidae
Agathidium
Agathidium hatchi

description: Agathidium hatchi Wheeler, 1977 Agathidium hatchi was reported by Miller and Wheeler (2005) from a series of female specimens collected in northwestern Oregon and a single male specimen apparently collected in Frederickton (sic), New Brunswick (20.III.1961, R.C. Clark, Utah State University). Miller and Wheeler (2005: 21) wrote, that “The distribution of the species is unusual in that specimens are known from Oregon and New Brunswick, but from nowhere in between. The Oregon specimens (including the type) are females and the New Brunswick specimen is a male. Therefore, there is some possibility the specimens represent different species...,” and “It is also possible that the New Brunswick specimen is mislabeled.” The preponderance of evidence indicates that the record from New Brunswick is erroneous and resulted from a mislabeled specimen. Several reasons indicate this: a) for most of his career R.C. Clark worked on control of balsam wooly adelgid [Adelges piceae (Ratzeburg)] and he never conducted research on Coleoptera (W. Varty, pers. comm.); b) the weather conditions on 20 March, 1961 Fredericton were fully winter-like. Temperatures ranged from -12.8°C (low) to -2.2°C (high) and there was 64 cm of snow on the ground (National Climate Archive 2007), highly improbable circumstances in which to find a slime mold beetle such as Agathidium; c) if R.C. Clark (who worked for the Canadian Forestry Service) had collected any Agathidium specimens incidentally as part of his research, some specimens would have been deposited in the Atlantic Forestry Centre research collection in Fredericton. There are no such specimens in the collection (G. Smith and J. Sweeney, pers. comm.); d) R.C. Clark lived in Fredericton for over three decades and it is highly unlikely that he would misspell the name of the capital city of New Brunswick as “Frederickton”; e) in the 1960s there were no scientific exchanges or research programs between Atlantic Forestry Centre and Utah State University (W. Varty, pers. comm.). Thus, there is no evidence that would indicate that this specimen was actually collected in New Brunswick. Accordingly, we remove this species form the New Brunswick faunal list.
description: Published as part of Majka, Christopher & Langor, David, 2008, The Leiodidae (Coleoptera) of Atlantic Canada: new records, faunal composition, and zoogeography, pp. 357-402 in ZooKeys 2 (2) on pages 378-379, DOI: 10.3897/zookeys.2.56, http://zenodo.org/record/576397
description: {"references": ["Wheeler QD, Miller KB (2005) Slime-mold beetles of the genus Agathidium Panzer in North and Central America, Part I. Coleoptera: Leiodidae. Bulletin of the American Museum of Natural History 290: 1 - 95.", "National Climate Archive (2007) http: // climate. weatheroffice. ec. gc. ca / [accessed 29 June 2008]"]}
Venerdì sera? Esco con i ricercatori dell’Inaf
Creators: Livia Giacomini
Publisher: name: Media Inaf
Year: 2019

La Notte dei ricercatori è ormai alle porte: l’appuntamento in tutt’Europa è per venerdì 27 settembre. E anche quest’anno le ricercatrici e i ricercatori dell’Istituto nazionale di astrofisica parteciperanno in massa, proponendo al pubblico numerose iniziative – incontri, giochi, spettacoli, osservazioni del cielo stellato – in tutt’Italia e non solo.
V3885 Sagittarius: a Comparison with a Range of Standard Model Accretion Disks
Creators: name: Linnell, Albert P.
name: Godon, Patrick
name: Hubeny, Ivan
name: Sion, Edward M.
name: Szkody, Paula
name: Barrett, Paul E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: A $\widetildeχ^2$ analysis of standard model accretion disk synthetic spectrum fits to combined $FUSE$ and STIS spectra of V3885 Sagittarius, on an absolute flux basis, selects a model that accurately represents the observed SED. Calculation of the synthetic spectrum requires the following system parameters. The cataclysmic variable secondary star period-mass relation calibrated by Knigge in 2007 sets the secondary component mass. A mean white dwarf (WD) mass from the same study, that is consistent with an observationally-determined mass ratio, sets the adopted WD mass of $0.7M_{\odot}$, and the WD radius follows from standard theoretical models. The adopted inclination, $i=65{\arcdeg}$, is a literature consensus, and is subsequently supported by $\widetildeχ^2$ analysis. The mass transfer rate is the remaining parameter to set the accretion disk $T_{\rm eff}$ profile, and the $Hipparcos$ parallax constrains that parameter to $\dot{M}=5.0{\pm}2.0{\times}10^{-9} M_{\odot} {\rm yr}^{-1}$ by a comparison with observed spectra. The fit to the observed spectra adopts the contribution of a $57,000{\pm}5000$K WD. The model thus provides realistic constraints on $\dot{M}$ and $T_{\rm eff}$ for a large $\dot{M}$ system above the period gap.
description: 41 pages, 7 figures, 9 tables. Astrophysical Journal (accepted)
Bromus diandrus Roth
Creators: name: Cardona, Àngel Manuel Hernández
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Poales
Poaceae
Bromus
Bromus diandrus

description: Bromus diandrus Roth
(estripa-sacs). Nadiu del sud i sud-oest d’Europa, nord d’Àfrica i sud-oest d’Àsia, i introduït en altres parts del món. Indiferent al substrat, creix en indrets herbosos de tendència ruderal i vores de camins. Hi és poc abundant.
description: Published as part of Cardona, Àngel Manuel Hernández, 2022, Catàleg actualitzat i claus d'identificació de les gramínies de Sant Llorenç del Munt i l'Obac (Barcelona), pp. 64-86 in Nemus 12 on page 69, DOI: 10.5281/zenodo.12170499
Agathidium mollinum Fall 1934
Creators: name: Majka, Christopher
name: Langor, David
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Leiodidae
Agathidium
Agathidium mollinum

description: Agathidium mollinum Fall, 1934 NEW BRUNSWICK: Kent Co.: Kouchibouguac National Park, 13.IX.1977, J.M. Campbell, CNC. NEWFOUNDLAND: Little Grand Lake, 2 km east of Martin Pond, 15.VII-25.VIII.1992, old fir forest, pitfall trap, (1, MUN). NOVA SCOTIA: Guysborough Co.: Seloam Lake, 2-15.VI.1997, D.J. Bishop, red spruce forest, flight-intercept trap, (1, NSMC); Inverness Co.: MacKenzies Mtn., 4.VI.1983, R. Vockeroth, pan trap, (1, CNC); MacKenzies Mtn., 27-29.VIII.1983, M. Sharkey, (1, CNC); MacKenzies Mtn., 18.IX.1983, J.M. Campbell and A. Davies, sifting mosses, (1, CNC); Victoria Co.: North Mtn., VIII.1983, D.E. and J.E. Bright, (1, CNC); Yarmouth Co.: Wellington, 12-20.VIII.1991, J. Cook, coastal forest, flight-intercept trap, (1, JCC). Agathidium mollinum is newly recorded in New Brunswick, Newfoundland, Nova Scotia, and in Atlantic Canada (Fig. 7). It was recorded from birch, fir, maple, and conifer litter and from a fern rhizome. Host records include the slime molds Cribraria purpurea Schrad., Diderma floriforme (Bull.) Pers., and Stemonitis axifera (Bull.) T. Macabr. (Miller and Wheeler 2005).
description: Published as part of Majka, Christopher & Langor, David, 2008, The Leiodidae (Coleoptera) of Atlantic Canada: new records, faunal composition, and zoogeography, pp. 357-402 in ZooKeys 2 (2) on page 379, DOI: 10.3897/zookeys.2.56, http://zenodo.org/record/576397
description: {"references": ["Wheeler QD, Miller KB (2005) Slime-mold beetles of the genus Agathidium Panzer in North and Central America, Part I. Coleoptera: Leiodidae. Bulletin of the American Museum of Natural History 290: 1 - 95."]}
A survey of fractured SrTiO$_3$ surfaces: from the micro-meter to nano-meter scale
Creators: name: Chien, TeYu
name: Guisinger, Nathan P.
name: Freeland, John W.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Cross-sectional scanning tunneling microscopy was utilized to study fractured perovskie oxide surfaces. It was found for the non-cleavable perovskite oxide, SrTiO$_{3}$, that atomically flat terraces could be routinely created with a controlled fracturing procedure. Optical and scanning electron microscopy as well as a profilometer were used to obtain the information from sub-millimeter to sub-micrometer scales of the fractured surface topography.
description: 9 pages, 4 figures
The Temperature of the Cosmic Microwave Background
Creators: name: Fixsen, D. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The FIRAS data are independently recalibrated using the WMAP data to obtain a CMB temperature of 2.7260 +/- 0.0013. Measurements of the temperature of the cosmic microwave background are reviewed. The determination from the measurements from the literature is cosmic microwave background temperature of 2.72548 +/- 0.00057 K.
description: 6 Pages 3 figures
Agathidium oniscoides Palisot de Beauvois 1817
Creators: name: Majka, Christopher
name: Langor, David
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Leiodidae
Agathidium
Agathidium oniscoides

description: Agathidium oniscoides Palisot de Beauvois, 1817 NOVA SCOTIA: Cumberland Co.: Wentworth, 21.V.1965, B. Wright, (1, NSMC); Queens Co.: Sixth Lake, 18.VI.2003, P. Dollin, old-growth hemlock forest, pitfall trap, (1, NSMC). Agathidium oniscoides is newly recorded in Nova Scotia and in Atlantic Canada as a whole (Fig. 6). This species was collected throughout the year (except for January) in various deciduous forest habitats in leaf and log litter samples. Host records include the fungi Bjerkandera adusta (Fr.) Kar., and “fleshy fungi,” and the slime molds Fulgio septica, Ceratiomyxa fruticulosa (Müll.) Mac., and other myxomycetes (Miller and Wheeler 2005). The Nova Scotia record in an old-growth hemlock forest is noteworthy.
description: Published as part of Majka, Christopher & Langor, David, 2008, The Leiodidae (Coleoptera) of Atlantic Canada: new records, faunal composition, and zoogeography, pp. 357-402 in ZooKeys 2 (2) on page 380, DOI: 10.3897/zookeys.2.56, http://zenodo.org/record/576397
description: {"references": ["Wheeler QD, Miller KB (2005) Slime-mold beetles of the genus Agathidium Panzer in North and Central America, Part I. Coleoptera: Leiodidae. Bulletin of the American Museum of Natural History 290: 1 - 95."]}
Diagnostic for new physics in $B \to πK$ decays
Creators: name: Baek, Seungwon
name: Chiang, Cheng-Wei
name: Gronau, Michael
name: London, David
name: Rosner, Jonathan L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A recent analysis of $B \to πK$ decays concludes that present data do not clearly indicate whether (i) the standard model (or $ΔI=0$ new physics) is sufficient, or (ii) $ΔI=1$ new physics is needed. We show that these two possibilities can be distinguished by whether a sum rule relating the CP asymmetries of the four $B \to πK$ decays is valid. If case (i) is favored, the sum rule holds, and one predicts $A_{CP}(π^0 K^0) = -0.15$, while in case (ii) fits to new physics involving large values of a color-suppressed tree amplitude entail $A_{CP}(π^0 K^0) = -0.03$. The current experimental average $A_{CP}(π^0 K^0) = -0.01 \pm 0.10$ must be measured a factor of at least three times more precisely in order to distinguish between the two cases.
description: 10 pages, no figures. Submitted to Physics Letters B. Slight clarification added
title: Ð¢ÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ñ ÐºÐ²Ð°ÑÐ° Ñ Ð´Ð¾Ð±Ð°Ð²ÐºÐ°Ð¼Ð¸ ÑÐµÐ´ÑÑ Ð¿Ð»Ð¾Ð´Ð¾Ð² Ð°Ð¿ÐµÐ»ÑÑÐ¸Ð½Ð° CÄ«trus sinÄnsis
title: Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÑÐºÐ°Ñ ÑÐ°Ð±Ð¾ÑÐ°
titleType: Subtitle
Creators: name: Ð¡Ð¾ÐºÐ¾Ð»Ð¾Ð²Ð°, ÐÐ½Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2016
Subjects: ÐºÐ²Ð°Ñ
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Ð²Ð¸ÑÐ°Ð¼Ð¸Ð½ Ð¡
ÑÐµÐ´ÑÐ° Ð°Ð¿ÐµÐ»ÑÑÐ¸Ð½Ð°

description: ÐÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¾ ÐºÐ¾Ð»Ð¸ÑÐµÑÑÐ²Ð¾ Ð²Ð¸ÑÐ°Ð¼Ð¸Ð½Ð° Ð¡ Ð² Ð¿Ð»Ð¾Ð´Ð°Ñ ÑÐ¸ÑÑÑÑÐ¾Ð²ÑÑ ÑÐ°ÑÑÐµÐ½Ð¸Ð¹ Ð¸ ÑÐµÐ´ÑÐµ Ð°Ð¿ÐµÐ»ÑÑÐ¸Ð½Ð°. ÐÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð° Ð¼Ð°ÑÑÐ¾Ð²Ð°Ñ Ð´Ð¾Ð»Ñ Ð²Ð»Ð°Ð³Ð¸ Ð² ÑÐµÐ´ÑÐµ. ÐÐ±Ð¾Ð³Ð°ÑÐµÐ½Ð¸Ðµ ÐºÐ²Ð°ÑÐ° ÑÐµÐ´ÑÐ¾Ð¹ Ð¿Ð»Ð¾Ð´Ð¾Ð² Ð°Ð¿ÐµÐ»ÑÑÐ¸Ð½Ð° Citrus sinensis. ÐÐ¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¾ ÑÐ¾Ð´ÐµÑÐ¶Ð°Ð½Ð¸Ðµ Ð°ÑÐºÐ¾ÑÐ±Ð¸Ð½Ð¾Ð²Ð¾Ð¹ ÐºÐ¸ÑÐ»Ð¾ÑÑ Ð¸ ÑÑÐ¼Ð¼Ñ ÑÐµÐ½Ð¾Ð»ÑÐ½ÑÑ ÑÐ¾ÐµÐ´Ð¸Ð½ÐµÐ½Ð¸Ð¹ Ð² ÐºÐ²Ð°ÑÐµ. Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð° ÑÐµÑÐµÐ¿ÑÑÑÐ° ÐºÐ²Ð°ÑÐ°, Ð¾Ð±Ð¾Ð³Ð°ÑÐµÐ½Ð½Ð¾Ð³Ð¾ ÑÐµÐ´ÑÐ¾Ð¹ Ð°Ð¿ÐµÐ»ÑÑÐ¸Ð½Ð°.
Agathidium pulchrum LeConte 1853
Creators: name: Majka, Christopher
name: Langor, David
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Leiodidae
Agathidium
Agathidium pulchrum

description: Agathidium pulchrum LeConte, 1853 NEWFOUNDLAND: Burgeo, Grandy Brook, 24.VI.1949, E. Palmen, (1, MZHF); Stephenville: Barachois Pond Park, 23.VII-19.VIII.1997, S. and J. Peck, fir-deciduous forest, flight-intercept trap, (1, MUN). NOVA SCOTIA: Yarmouth Co.: Cape Forchu, West Cape, 28.VI-4.VII.1995, J. and F. Cook, flight-intercept trap, (1, JCC). Agathidium pulchrum is newly recorded in Newfoundland, Nova Scotia, and in Atlantic Canada as a whole (Fig. 7). It has been collected in many different coniferous and deciduous forests, from moss duff, and in riparian areas between May and September. Host records include the slime molds Arcyria nutans (Bull.) Grev., Comatrichia sp., Stemonitis flavogenita E. Jahn, Trichia decipiens (Meyl.) Y. Yamam, and Tubifera ferruginosa (Batsch) J.F. Gmelin, and the fungi Lenzites betulina (Fr.) Fr., Tramates versicolor (Fr.) Pil., and Stereum sp. (Miller and Wheeler 2005).
description: Published as part of Majka, Christopher & Langor, David, 2008, The Leiodidae (Coleoptera) of Atlantic Canada: new records, faunal composition, and zoogeography, pp. 357-402 in ZooKeys 2 (2) on pages 380-381, DOI: 10.3897/zookeys.2.56, http://zenodo.org/record/576397
description: {"references": ["Wheeler QD, Miller KB (2005) Slime-mold beetles of the genus Agathidium Panzer in North and Central America, Part I. Coleoptera: Leiodidae. Bulletin of the American Museum of Natural History 290: 1 - 95."]}
Cambio di nome per la cometa interstellare
Creators: Rossella Spiga
Publisher: name: Media Inaf
Year: 2019

Chiamata in un primo momento C/2019 Q4 (Borisov), la “cometa aliena” è stata ora rinominata 2I/Borisov dall’Unione astronomica internazionale: il prefisso ‘2I’ indica che proviene dallo spazio interstellare e che si tratta del secondo oggetto di questo tipo mai osservato
Enhanced Fermi surface nesting in superconducting BaFe$_2$(As$_{1-x}$P$_x$)$_2$ revealed by de Haas-van Alphen effect
Creators: name: Analytis, J. G.
name: Chu, J. -H.
name: McDonald, R. D.
name: Riggs, S. C.
name: Fisher, I. R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The three-dimensional Fermi surface morphology of superconducting BaFe_2(As_0.37}P_0.63)_2 with T_c=9K, is determined using the de Haas-van Alphen effect (dHvA). The inner electron pocket has a similar area and k_z interplane warping to the observed hole pocket, revealing that the Fermi surfaces are geometrically well nested in the (π,π) direction. These results are in stark contrast to the Fermiology of the non-superconducting phosphides (x=1), and therefore suggests an important role for nesting in pnictide superconductivity.
description: 5 pages, 4 figures
Table S2: Paleoproterozoic metaluminous syenites synchronous with the c. 2.21 Ga mafic dyke swarms from the Eastern Dharwar Craton, India: implications for alkaline magmatism associated with the breakup of supercraton Superia
Creators: name: Pandey, Ashutosh
name: N.V. Chalapathi Rao
name: Waliur Rahaman
name: Seth, Vikas
name: Samarendra Sahoo
Publisher: name: Geological Society of London
Year: 2021
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Rb–Sr isotopic compositions for the studied syenites
Vulcani di lava metallica nel passato di Psyche
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2019

Si chiama ferrovulcanismo – un processo vulcanico in cui il magma è costituito di metallo liquido, invece che di roccia liquida – e potrebbe spiegare perché l’asteroide 16 Psyche, pur essendo ricoperto interamente di metallo, abbia una densità relativamente ridotta
title: ÐÐ½Ð°Ð»Ð¸Ð· Ð¸ Ð¿Ð»Ð°Ð½Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¾Ð±Ð¾ÑÐ¾ÑÐ° Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ ÑÐ¾ÑÐ³Ð¾Ð²Ð»Ð¸ Ð¸ Ð¾ÑÐµÐ½ÐºÐ° ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ ÐµÐ³Ð¾ Ñ Ð¾Ð·ÑÐ¹ÑÑÐ²ÐµÐ½Ð½Ð¾Ð¹ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
Creators: name: ÐÐµÑÐµÐ¿Ð»ÐµÑÐµÐ½ÐºÐ¾, ÐÐ¸ÐºÑÐ¾ÑÐ¸Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2018
Subjects: Ð¾Ð±ÑÐµÐ¼ Ð¿ÑÐ¾Ð´Ð°Ð¶
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ÑÑÑÑÐºÑÑÑÐ° ÑÐ¾Ð²Ð°ÑÐ¾Ð¾Ð±Ð¾ÑÐ¾ÑÐ°
Ð¿Ð»Ð°Ð½Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÐ¾Ð´Ð°Ð¶

description: ÐÐ±ÑÐµÐºÑÐ¾Ð¼ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑÐ²Ð»ÑÐµÑÑÑ ÐÐÐ Â«ÐÐ°Ð»ÐµÑÐ¸ÑÂ». Ð¦ÐµÐ»ÑÑ Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ ÑÐ²Ð»ÑÐµÑÑÑ Ð¿ÑÐ¾Ð°Ð½Ð°Ð»Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°ÑÑ Ð¸ Ð·Ð°Ð¿Ð»Ð°Ð½Ð¸ÑÐ¾Ð²Ð°ÑÑ Ð¾Ð±Ð¾ÑÐ¾Ñ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ ÑÐ¾ÑÐ³Ð¾Ð²Ð»Ð¸ Ð½Ð° Ð±ÑÐ´ÑÑÐ¸Ð¹ Ð¿ÐµÑÐ¸Ð¾Ð´ ÑÐµÑÐµÐ· Ð¾ÑÐµÐ½ÐºÑ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ ÐµÐ³Ð¾ ÑÐ¾Ð·ÑÐ¹ÑÑÐ²ÐµÐ½Ð½Ð¾Ð¹ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸. ÐÐ° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° ÑÑÐ½ÐºÐ° ÑÐ¾Ð²Ð°ÑÐ¾Ð² Ð¼ÐµÐ»ÐºÐ¾Ð¹ Ð±ÑÑÐ¾Ð²Ð¾Ð¹ ÑÐµÑÐ½Ð¸ÐºÐ¸ Ð±ÑÐ»Ð¸ Ð²ÑÐ´ÐµÐ»ÐµÐ½Ñ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ ÐºÐ¾Ð½ÐºÑÑÐµÐ½ÑÑ ÐÐÐ Â«ÐÐ°Ð»ÐµÑÐ¸ÑÂ». ÐÑÐ» Ð¿ÑÐ¾Ð°Ð½Ð°Ð»Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½ ÑÐ¾Ð²Ð°ÑÐ¾Ð¾Ð±Ð¾ÑÐ¾Ñ Ð¿Ð¾ Ð¾Ð±ÑÐµÐ¼Ñ Ð¸ ÑÑÑÑÐºÑÑÑÐµ Ð¸ Ð¾ÑÐµÐ½ÐµÐ½Ñ ÑÐ°ÐºÑÐ¾ÑÑ, Ð²Ð»Ð¸ÑÑÑÐ¸Ðµ Ð½Ð° Ð¾Ð±ÑÐµÐ¼ Ð¿ÑÐ¾Ð´Ð°Ð¶. Ð Ð°ÑÑÑÐ¸ÑÐ°Ð½Ð° ÑÐ¾ÑÐºÐ° Ð±ÐµÐ·ÑÐ±ÑÑÐ¾ÑÐ½Ð¾ÑÑÐ¸ ÑÐ°Ð±Ð¾ÑÑ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ. Ð¡Ð´ÐµÐ»Ð°Ð½ Ð¿ÑÐ¾Ð³Ð½Ð¾Ð· Ð²ÑÑÑÑÐºÐ¸ Ð¸ Ð·Ð°ÑÑÐ°Ñ Ñ ÑÑÐµÑÐ¾Ð¼ Ð¸Ð·Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ ÑÐ¾Ð¾ÑÐ²ÐµÑÑÑÐ²ÑÑÑÐ¸Ñ Ð¿Ð¾ÐºÐ°Ð·Ð°ÑÐµÐ»ÐµÐ¹.
Un ponte tra due culture
Creators: Anna Curir
Publisher: name: Media Inaf
Year: 2019

A 60 anni dall’uscita del pamphlet di Charles P. Snow “Le due culture”, venerdì 27 settembre si terrà alla Sapienza Università di Roma un incontro sul rapporto fra discipline scientifiche e umanistiche, con particolare riferimento ad alcune esperienze italiane
Optimization of cw sodium laser guide star efficiency
Creators: name: Holzlohner, R.
name: Rochester, S. M.
name: Calia, D. Bonaccini
name: Budker, D.
name: Higbie, J. M.
name: Hackenberg, W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context: Sodium laser guide stars (LGS) are about to enter a new range of laser powers. Previous theoretical and numerical methods are inadequate for accurate computations of the return flux and hence for the design of the next-generation LGS systems. Aims: We numerically optimize the cw (continuous wave) laser format, in particular the light polarization and spectrum. Methods: Using Bloch equations, we simulate the mesospheric sodium atoms, including Doppler broadening, saturation, collisional relaxation, Larmor precession, and recoil, taking into account all 24 sodium hyperfine states and on the order of 100 velocity groups. Results: LGS return flux is limited by "three evils": Larmor precession due to the geomagnetic field, atomic recoil due to radiation pressure, and transition saturation. We study their impacts and show that the return flux can be boosted by repumping (simultaneous excitation of the sodium D2a and D2b lines with 10-20% of the laser power in the latter). Conclusions: We strongly recommend the use of circularly polarized lasers and repumping. As a rule of thumb, the bandwidth of laser radiation in MHz (at each line) should approximately equal the launched laser power in Watts divided by six, assuming a diffraction-limited spot size.
description: 15 pages, 12 figures, to be published in Astronomy & Astrophysics, AA/2009/13108