Search results for "raft"

El prestigio de los objetos: mangos de marfil en el mundo ibérico

2020

El estudio se centra en una serie de mangos de marfil de características morfotécnicas similares, recuperados en espacios de hábitat y funerarios ibéricos y datados entre el s. IV y el s. II a. C. Se trata de objetos de prestigio al alcance de una élite aristocrática, que han sido elaborados con materias primas exóticas (marfil) y técnicas decorativas inusuales que indican una especialización. A través de análisis de composición por infrarrojo cercano por Transformada de Fourier (FT-NIR) y de fluorescencia de rayos X (pXRF) se ha podido documentar la presencia de incrustaciones de ámbar adheridas a la superficie de los mangos mediante el uso del estaño como soldadura blanda y el empleo de a…

Characterization of Color Production in Xalla´s Palace Complex, Teotihuacan

2020

A multi-analytical approach was used to characterize color remains from Xalla, a Teotihuacan palace complex (project Teotihuacan, Elite and Government. Excavations in Xalla led by Linda R. Manzanilla). Color samples were obtained from polished lithic instruments and pigment ores. Those samples were analyzed combining microscopic and spectroscopic techniques. Our results coincide with previous studies in Teotihuacan, with the chromatic palette displaying a predominance of iron oxides such as hematite, yellow ochre and natural earths, as well as malachite, celadonite and glauconite. We have enlarged the corpus of raw materials with the characterization of jarosite and bone white and mica as a…

Fanny Churbergin kirjoitukset tekstiilisuunnittelusta : heijastumia 1800-luvun kansainväliseen muotoilukeskusteluun

1998

Artilleriâ Velikogo Knâžestva Litovskogo v XVII v. : finansirovanie, voennye transportnye rashody, remeslennaâ rabota

2015

State artillery in Lithuania in the seventeenth century was relatively neglected area of military and only from 1637 years it constituted a separate body. In the second half of the seventeenth century cannon in the arsenals of Lithuania were outdated and there were rarely works with new ones. During this period, it also struggled with the problem of its unification. In the Grand Duchy of Lithuania there was also a private artillery, and the law allowed anyone nobleman, if he could afford it, to have a cannon. The private fortresses they were much more modern than the artillery State. Another issue was transporting artillery to the war,which was associated with the employment of many people,…

NUOVI TERRITORI DEL DESIGN TRA ARTIGIANATO E LUOGHI STORICI DELLA CITTÀ _ NEW TERRITORIES OF DESIGN BETWEEN ARTISAN HERITAGE AND HISTORICAL SITES OF …

2017

La riscoperta del lavoro artigiano supera i confini dell’economia e ci invita a riflettere su cosa può essere oggi la creatività. Nel prossimo decennio, gli innovatori più brillanti non dovranno più affidare ad altri la realizzazione delle loro idee, ma potranno produrre e distribuire da soli, sfruttando web e nuove tecnologie. Il progetto CREZI_FOOD_KIT si muove all’interno di questo sistema. Coinvolge il Centro Storico di Palermo partendo dal cibo e prova a creare una filiera i cui prodotti si sostengono a vicenda alla ricerca di una nuova via in cui tradizione e innovazione camminano fianco a fianco. The rediscovery of craftsmanship transcends the boundaries of economy and invites us to …

Imaging in the catheterization laboratory

1993

Recent work confirms that visual assessment of the effect of widely employed coronary interventions is highly inaccurate. Rapid and reliable on-line angiographic quantitation is a useful advance, but problems in the application of the technique are encountered in a substantial number of cases. New algorithms have been devised to provide a comprehensive assessment of the geometry and likely functional significance of lesions as well as an objective evaluation of lesion morphology, and recent work has provided the framework for the quantitation of diffuse disease. Studies with intravascular ultrasound confirm the inadequate sensitivity of angiography in demonstrating mild to moderate atheroma…

SOUTHTRAC-GW: An airborne field campaign to explore gravity wave dynamics at the world’s strongest hotspot

2021

The southern part of South America and the Antarctic peninsula are known as the world’s strongest hotspot region of stratospheric gravity wave (GW) activity. Large tropospheric winds are deflected by the Andes and the Antarctic Peninsula and excite GWs that might propagate into the upper mesosphere. Satellite observations show large stratospheric GW activity above the mountains, the Drake Passage, and in a belt centered along 60°S. This scientifically highly interesting region for studying GW dynamics was the focus of the Southern Hemisphere Transport, Dynamics, and Chemistry–Gravity Waves (SOUTHTRAC-GW) mission. The German High Altitude and Long Range Research Aircraft (HALO) was deployed …

Mixed-Phase Clouds: Progress and Challenges

2017

Mixed-phase clouds represent a three-phase colloidal system consisting of water vapor, ice particles, and coexisting supercooled liquid droplets. Mixed-phase clouds are ubiquitous in the troposphere, occurring at all latitudes from the polar regions to the tropics. Because of their widespread nature, mixed-phase processes play critical roles in the life cycle of clouds, precipitation formation, cloud electrification, and the radiative energy balance on both regional and global scales. Yet, in spite of many decades of observations and theoretical studies, our knowledge and understanding of mixed-phase cloud processes remains incomplete. Mixed-phase clouds are notoriously difficult to represe…

ML-CIRRUS: The Airborne Experiment on Natural Cirrus and Contrail Cirrus with the High-Altitude Long-Range Research Aircraft HALO

2017

Abstract The Midlatitude Cirrus experiment (ML-CIRRUS) deployed the High Altitude and Long Range Research Aircraft (HALO) to obtain new insights into nucleation, life cycle, and climate impact of natural cirrus and aircraft-induced contrail cirrus. Direct observations of cirrus properties and their variability are still incomplete, currently limiting our understanding of the clouds’ impact on climate. Also, dynamical effects on clouds and feedbacks are not adequately represented in today’s weather prediction models. Here, we present the rationale, objectives, and selected scientific highlights of ML-CIRRUS using the G-550 aircraft of the German atmospheric science community. The first combi…

Report of the COSPAR Mars special regions colloquium

2010

International audience; In this paper we present the findings of a COSPAR Mars Special Regions Colloquium held in Rome in 2007. We review and discuss the definition of Mars Special Regions, the physical parameters used to define Mars Special Regions, and physical features on Mars that can be interpreted as Mars Special Regions. We conclude that any region experiencing temperatures > -25 degrees C for a few hours a year and a water activity > 0.5 can potentially allow the replication of terrestrial microorganisms. Physical features on Mars that can be interpreted as meeting these conditions constitute a Mars Special Region. Based on current knowledge of the martian environment and the conser…