Search results for "equipment and supplies"

Results on radiation hardness of black silicon induced junction photodetectors from proton and electron radiation

2020

Abstract The stability of black silicon induced junction photodetectors under high-energy irradiation was tested with 11 MeV protons and 12 MeV electrons using fluence of 1 ⋅ 10 10 protons/cm2 and dose of 67 krad(Si) for protons and electrons, respectively. The energies and dose levels were selected to test radiation levels relevant for space applications. The degradation was evaluated through dark current and external quantum efficiency changes during (within 1 h after each step) and after (some days after) full irradiation sequences. Furthermore, the black silicon photodetectors were compared to planar silicon induced junction and planar silicon pn-junction photodetectors to assess the co…

Heavy-Ion Induced Charge Yield in MOSFETs

2009

The heavy-ion induced electron/hole charge yield in silicon-oxide versus electric field is presented. The heavy-ion charge yield was determined by comparing the voltage shifts of MOSFET transistors irradiated with 10-keV X-rays and several different heavy ions. The obtained charge yield for the heavy ions is in average nearly an order of magnitude lower than for the X-rays for the entire range of measured electric fields.

Versuche zur Herstellung linolsäurearmen Ölsäureesters mit Rhodium‐Zinn‐Komplexen als Katalysatoren

1978

Der Linolsauremethylester last sich in Gegenwart eines hohen Uberschusses an Olsaureester mit Rhodiumkomplexen und metallorganischen Zinnverbindungen als Katalysatoren selektiv oligomerisieren. Die Isomerisierung des Olsaureesters kann uber die Wahl einer geeigneten Zinnverbindung inhibiert werden. The Preparation of Oleic Acid Ester with Reduced Linoleic Acid Content by Use of Rhodium-Tin Complexes as Catalysts The linoleic acid methylester can be oligomerized selectively in the presence of a high excess of oleic acid ester with rhodium complexes and metalorganic tin compounds as catalyst. The isomerisation of the oleic acid ester can be inhibited by the choice of a suitable tin compound.

Death by Facial and Skull Injuries of a Motorcyclist Wearing a Full-Face Helmet: Case Report and Literature Review

2016

We describe a case of death by facial and skull fractures with brain injuries of a motorcyclist wearing a full-face helmet. A 40-year-old man driving a high-powered motorcycle crashed violently into the rear of a stopped car. The main results from the autopsy revealed the deformation of the left orbito-zygomatic and fronto-temporoparietal regions corresponding to bone fractures with laceration at the left temporal lobe. The CT scan of the helmet revealed the detachment of the energy-absorbing liner. Moreover an impact speed of 93 Km/h resulted from the analysis of accident dynamics. We analysed the literature regarding the effectiveness of full-face helmets in reducing the risk of fatality …

Two-second standardization of the Harpenden Caliper.

1981

Asymmetric tungsten oxide nanobrushes via oriented attachment and Ostwald ripening

2011

Tungsten oxide nanobrushes were synthesized using a solvothermal approach that lead to self-branching in the presence of citric acid and hexadecylamine as surfactants. Our synthetic approach yielded branched nanorods of tungsten oxide in a single synthetic step. Based on our results, we propose a phenomenological pathway for the formation, branching, and assembly of these tungsten oxide brushes. The formation of tungsten oxide brushes proceeds by thermal decomposition of ammonium tungstate in the presence of citric acid and hexadecylamine. The pale blue powder obtained after solvothermal reaction was analyzed by X-ray diffraction (XRD), transmission electron microscopy (TEM) and high-resolu…

X-ray powder diffraction phase analysis and thermomechanical properties of silica and alumina porcelains

2004

Chemical and mineralogical characterization, using the Rietveld method, of some silica and alumina rich porcelains and its relationship with thermomechanical properties have been studied in this work. X-ray powder diffraction analysis allows to differ clearly between silica and alumina porcelains. X-ray study shows that both porcelains have a content of vitreous phase. This vitreous phase is higher in the silica than in the alumina porcelain. Dilatometric studies combined with powder diffraction methods shows a strong relationship between silica content and a lower expansion coefficients and between alumina content and a higher crash resistance. Lower contents in vitreous phase in porcelain…

"Table 8" of "Measurement of the cross section for W-boson production in association with jets in ppbar collisions at s**(1/2) = 1.96-TeV"

2008

Total cross sections for W production in association with 3 or more jets.

"Bull’s eye” appearance of hepatocellular adenomas in patients with glycogen storage disease type I — atypical magnetic resonance imaging findings: T…

2021

BACKGROUND Hepatocellular adenomas are rare tumors that can occur in patients with glycogen storage disease type I. CASE SUMMARY We herein report two cases of histologically proven hepatocellular adenomas in patients with glycogen storage disease type I. Magnetic resonance imaging (MRI) was performed after bolus injection of gadoxetate disodium, a liver-specific gadolinium-based MRI contrast agent. In the present cases, some of the hepatocellular adenomas showed unexpectedly a “bull’s eye” appearance on T2-weighted and post-contrast images, which was not previously described as imaging findings of hepatocellular adenomas in glycogen storage disease. A bull’s eye appearance on T2-weighted im…

Antiamphiphysin-positive stiff-person syndrome associated with small cell lung cancer

2006

The paraneoplastic amphiphysin(+) stiff-person syndrome (SPS) has so far only been described in women with breast adenocarcinoma. Here, we describe the rare case of a female patient with antiamphiphysin(+) SPS due to small cell cancer of the lung.