Search results for "ACC"

High-Gradient RF laboratory at IFIC for medical applications

2018

General interest has been shown over the last years for compact and more affordable facilities for hadron-therapy. The High-Gradient (HG) know-how and technology for normal-conducting accelerating RF (Radio-Frequency) electron linac (linear accelerator) structures recently developed for projects such as CLIC (CERN), has raised the achievable accelerating gradient from 20-30 MV/m up to 100-120 MV/m. This gain has come through a better understanding of the high-power RF vacuum arcs or breakdowns (BD) phenomena, the development of quantitative HG RF design methods and refinements in fabrication techniques. This can allow for more compact linacs also for protons, which is potentially important …

Transport and extraction of radioactive ions stopped in superfluid helium

2003

A new approach to convert a high energy beam to a low energy one, which is essential for the next generation radioactive ion beam facilities, has been proposed and tested at Jyvaskyla, Finland. An open Ra-223 alpha-decay-recoil source has been used to produce radioactive ions in superfluid helium. The alpha spectra demonstrate that the recoiling Rn-219 ions have been extracted out of liquid helium. This first observation of the extraction of heavy positive ions across the superfluid helium surface was possible thanks to the high sensitivity of radioactivity detection. An efficiency of 36% was obtained for the ion extraction out of liquid helium. (C) 2003 Elsevier Science B.V. All rights res…

Use of fragmentation beams at LNS with CHIMERA detector

2012

The recent intensity upgrade of the LNS fragmentation beam is discussed. The available beams, the tagging procedures and details on the beam quality are reported. The experimental program started with the CHIMERA detector using such beams is also discussed with preliminary results and future perspectives. © Owned by the authors, 2012.

Stock Market Integration and the Global Financial Crisis

2014

We study the dynamics of stock market integration and its consequences during the recent financial crisis for twenty-three developed and sixty emerging markets. We find that integration increased slightly for emerging markets but decreased for developed countries during the crisis. Moreover, we argue that the high degree of integration propagated the crisis across the global financial markets at the beginning of the crisis, but it had little effect during the crisis. We also find that integration is mostly affected by financial openness, the institutional environment, and global financial uncertainty but that these determinants vary slightly between emerging and developed markets.

Determinants of current account balances

2011

Melleņu rametu struktūras raksturojums dažādās mežaudzēs

2016

Bakalaura darbs – ‘’Melleņu rametu struktūras raksturojums dažādās mežaudzēs’’ izstrādāts laika posmā no 2014. gada augusta līdz 2016. gada maijam Latvijas Universitātes, Bioloģijas fakultātes, Botānikas un ekoloģijas katedrā un Latvijas Valsts mežzinātnes institūtā ‘’Silava’’. Darbā izmantoti Lindas Robaltes maģistra darba laikā ievāktie melleņu rametu struktūru dati (vecums, diametrs un augstums) (Robalte 2014). Par pētījuma vietu izvēlētas divas dažādas teritorijas – dabas liegums ‘’Gruzdovas meži’’ vecāko apzināto egļu dēļ (~ 273 gadi) un Slīteres nacionālā parka teritorija, jo arī tajā koki sasnieguši līdzīgu vecumu, bet tajā ir tipiskāki augšanas apstākļi mellenēm. Katrā no teritorijā…

Parastās mellenes Vaccinium myrtillus (L.) rametu vecuma un izmēru struktūras salīdzinājums dažāda vecuma mētrāju audzēs Slīteres nacionālā parka ter…

2018

Mellene ir sīkkrūmu suga, kas ir viena no biežāk sastopamajām zemsedzes veģetācijas sugām boreālo mežu ekosistēmās, tomēr tā netiek pietiekami novērtēta. Mellene pozitīvi ietekmē bioloģisko daudzveidību, un tās klātbūtne ir viens no rādītājiem par mežu augšanas apstākļu bagātināšanos. Līdzīgi kā kokiem arī mellenes gadskārtas sniedz informāciju par apstākļiem konkrētajā teritorijā, taču par īsāku laika periodu. Par pētījuma vietu izvēlēts Slīteres nacionālais parks un tā apkārtne, jo tajā pārstāvēti dažāda vecuma mētrāji, kā arī tādēļ, ka noteiktā Slīteres nacionālā parka teritorijā iepriekš veidojies degums. Šajā teritorijā kopumā izveidots 21 parauglaukums (10 x 10m). Seši parauglaukumi i…

Current Social and Rangeland Access Trends among Pastoralists in the Western Algerian Steppe

2021

International audience; In the western Algerian steppe, the public authorities have carried out actions aimed at rural development (agricultural development programs) and combating desertification (grazing reserves) to counter the significant and rapid loss of vegetation cover of pastures by overgrazing, and the consequent impacts on local livelihoods. In the Rogassa area, these actions have impacted land tenure and the ancestral and collective way of land use and access. These changes have caused transformations in lifestyle and pasture management. This research aims to characterize how such changes are affecting local pastoralists and what their perceptions are about them. A selective sam…

Reputation and financial reporting in Finnish public organizations

2021

PurposeThis article analyzes the links between financial reports and reputation in the context of Finnish public sector organizations. In general, the paper discusses the accounting treatment of intangible and tangible assets and the quality and relevance of public sector financial reporting.Design/methodology/approachFor data, we combine three data sets: financial statement information of eight anonymous Finnish public organizations, the results of a reputation survey among their key stakeholders (N = 914) and a sample of the social media sentiment around the organizations.FindingsOur findings suggest that a decrease in spending and, surprisingly in the nonprofit sector, an increase in the…

Rappresentazioni tattili

2020

Sebbene molto spesso le persone con disabilità debbano accontentarsi di vivere parzialmente alcune esperienze, da diversi anni è aumentata l’attenzione dei siti museali verso la realizzazione di progetti e percorsi dedicati che consentano una fruizione tattile di opere e manufatti ai disabili visivi. Il contributo presenta due casi studio, che utilizzano modelli 3D per installazioni tattili. In presenza di deficit visivo, è importante rafforzare le facoltà percettive connettendo il tatto con i sensi residui e fornendo stimoli cognitivi diversi e paralleli. L’approccio multisensoriale, tattile e uditivo, realizzato grazie alla commistione tra modelli 3D e componenti elettroniche, favorisce l…