Search results for " figure"

2018

CrN thin films with an N/Cr ratio of 95% were deposited by reactive magnetron sputtering onto (0 0 0 1) sapphire substrates. X-ray diffraction and pole figure texture analysis show CrN (1 1 1) epitaxial growth in a twin domain fashion. By changing the nitrogen versus argon gas flow mixture and the deposition temperature, thin films with different surface morphologies ranging from grainy rough textures to flat and smooth films were prepared. These parameters can also affect the CrN x system, with the film compound changing between semiconducting CrN and metallic Cr2N through the regulation of the nitrogen content of the gas flow and the deposition temperature at a constant deposition pressur…

Half-Heusler superlattices as model systems for nanostructured thermoelectrics

2015

The efficiency of thermoelectric materials is directly related to the dimensionless figure of merit , therefore, one of the means to improve ZT is to reduce the thermal conductivity. Our research focuses on half-Heusler superlattices (SLs) and the relationship between the SL period and the thermal conductivity. The cross-plane thermal conductivity of DC-sputtered TiNiSn/HfNiSn SLs was measured by the 3 method at room temperature and a clear reduction of was achieved for all SL periods, in particular for periods smaller than 20 nm. Moreover, the thermal conductivities of TiNiSn and HfNiSn single films display reduced values compared to the literature data for bulk materials. Furthermore, we …

The Chevroches zodiacal cap and its Burgundy relations

2009

AbstractThe excavation of an unexplored secondary agglomeration in Chevroches (France), from 2001 to 2002 has led to the discovery of a bronze dome of a type unknown in the Ancient world. It is inscribed with three lines in Greek transcribing Egyptian and Roman months, and the twelve signs of the Zodiac. This paper presents the first observations and some other finds from similar objects in Burgundy.

Genesi geometrica delle volte centriche

1996

Un'analisi completa degli organismi voltati comporta lo studio delle molteplici componenti necessarie alla loro definizione: configurazione geometrica, sistema costruttivo, area storico-geografica di appartenenza, interpretazioni Stilistiche. L’obiettivo di questo studio è indirizzato all' analisi delle volte continue su pianta centrica definibili attraverso le leggi della geometria euclidea. L’indagine si pone all'interno dei confini relativi alla loro configurazione geometrica e il criterio adottato, svincolato da classificazioni di carattere tipologico o stilistico, propone l'identificazione di famiglie geometriche in base alla figura del poligono di base dell'impianto. Si può identifica…

A novel noise figure and gain test set for microwave devices

2002

A new instrument for the measurement of noise and gain of microwave devices is presented. It differs from the commercial ones in the accomplishment of the gain measurement and is also useful for measuring mismatched devices such as transistors, The instrument is driven via HP-IB by a PC and a user-friendly virtual panel is designed to perform all the required operations. Also included is the possibility of removing the second-stage noise contribution and correcting various sources of error (source ENR variations, temperature variations, etc.). The test set provides a very good accuracy for both matched and mismatched devices, usually limited by source ENR accuracy and step attenuator repeat…

Obraz Hrista v romane Čingiza Ajtmatova "Plaha"

2011

Aitmatov introduced a biblical motif into his novel – he chose Christ examination by Pilate. The writer extended the meaning of the scene, he altered its essence and “genre,” changing it into philosophical disputation. He also invented the story of Christ sailing with his mother on the Nile and their miraculous rescue by a crocodile. These scenes are presented in such a way that they remind the myth of the birth and death of Christ which allows rating Aitmatov's figure of Christ to the fifth category of literary embodiment of Christ proposed by T. Ziołkowski and called CHRIST AS A MYTH. A figure of Christ in the novel is a symbol of the highest perfection of humanity.

Challenging the Victorian Nuclear Family Myth: The Incest Trope in Guillermo del Toro’s Crimson Peak

2020

espanolLa literatura (neo)victoriana ofrece conceptualizaciones contradictorias de la familia nuclear, ya que generalmente gira en torno a hogares tradicionales heteroparentales pero los presenta como fragmentados y profundamente disfuncionales. La pelicula Crimson Peak (2015) del director Guillermo del Toro se basa en tres motivos recurrentes en la ficcion gotica (neo) victoriana, los traumas domesticos, la familia disfuncional y lo sobrenatural. Mi objetivo principal es explorar como Del Toro utiliza la trama del incesto para subvertir las visiones preconcebidas e idealizadas sobre la familia victoriana. En primer lugar, analizo la casa ancestral y la figura materna como origen de los tra…

Miradas oblicuas : infancias, paisajes y comunidades interrumpidas en el cine de Dominga Sotomayor

2020

Dominga Sotomayor propone, en De jueves a domingo (2012), Mar (2014) y Tarde para morir joven (2018), exploraciones de la intimidad de una familia, una pareja y una comunidad. En estos acercamientos, la intimidad se configura en grados variables de tensión con el afuera y lo público. En estas oscilaciones se pone en evidencia una de las características más recurrentes y estudiadas del cine chileno contemporáneo: la conversión de la intimidad en el locus sobre el que se proyectan, de manera indirecta, los conflictos del pasado y el presente. Este artículo considera la forma en que el cine de Sotomayor se inscribe en el panorama actual del cine chileno y, a través de él, en su escenario socio…

Proposal of Up-to-Date Standards on Methods of Measuring Noise Parameters of Microwave Transistors

1994

One of the most interesting topics for microrwave community is the characterization of low-noise transistors. After so many years, the Standards suggested by IEEE in 1960 are considered obsolete by the experimenters. A new methodology is here proposed as a standard. To support this proposal, an original measuring system for the complete characterization of microwave transistors in terms of noise, gain and scattering parameters from noise figure measurements only is presented.

Comparison between complete and simplified methods for determining the microwave noise parameters of HEMTs

1994

Modem automatic noise parameter measuring systems are based on measurements of some values of F(rs ) for different values of IГs (more than four, for redundancy) realized by adjusting an admittance transformer (tuner) inserted between the noise source and the TUT mput . Such values are then manipulated by means of proper data processing techniques using eqn.( 1) [ 11. This measuring procedure is hereafter referred to as standard to point out that the old `Standards on methods of measuring noise in linear twoports´ published by the IRE Subcommittee on noise in 1960 is considered obsolete by all the experimenters.