scholarly journals Effect of manufacturing technique on material homogeneity of an implant made of polyetheretherketone

Polimery ◽  
2020 ◽  
Vol 65 (11/12) ◽  
pp. 771-775
Author(s):  
WIKTORIA WOJNAROWSKA ◽  
SLAWOMIR MIECHOWICZ ◽  
TOMASZ KUDASIK
Keyword(s):  
Manufacturing Technique ◽  
Material Homogeneity

scholarly journals Fabrication and Qualitative Analysis of an Optical Fibre EFPI-Based Temperature Sensor

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4445
Author(s):  
Fintan McGuinness ◽  
Aidan Cloonan ◽  
Mohamed Oubaha ◽  
Dinesh Babu Duraibabu ◽  
M. Mahmood Ali ◽  
...  
Keyword(s):  
Temperature Sensor ◽  
Single Mode ◽  
Outer Diameter ◽  
The Novel ◽  
Single Mode Fibre ◽  
Manufacturing Technique ◽  
Sensor Structure ◽  
Sensitive Sensor ◽  
Quartz Capillary ◽  
Mode Fibre

The following presents a comparison of an extrinsic Fabry–Perot interferometer (EFPI)-based temperature sensor, constructed using a novel diaphragm manufacturing technique, with a reference all-glass EFPI temperature sensor. The novel diaphragm was manufactured using polyvinyl alcohol (PVA). The novel sensor fabrication involved fusing a single-mode fibre (SMF) to a length of fused quartz capillary, which has an inner diameter of 132 μm and a 220 μm outer diameter. The capillary was subsequently polished until the distal face of the capillary extended approximately 60 μm beyond that of the single mode fibre. Upon completion of polishing, the assembly is immersed in a solution of PVA. Controlled extraction resulted in creation of a thin diaphragm while simultaneously applying a protective coating to the fusion point of the SMF and capillary. The EFPI sensor is subsequently sealed in a second fluid-filled capillary, thereby creating a novel temperature sensor structure. Both temperature sensors were placed in a thermogravimetric analyser and heated from an indicated 30 °C to 100 °C to qualitatively compare sensitivities. Initial results indicated that the novel manufacturing technique both expedited production and produces a more sensitive sensor when compared to an all-glass construction.

scholarly journals Ultra-Wideband Flat Metamaterial GRIN Lenses Assisted with Additive Manufacturing Technique

2020 ◽  
pp. 1-1
Author(s):  
Shiyu Zhang ◽  
Ravi Kumar Arya ◽  
William G. Whittow ◽  
Darren Cadman ◽  
Raj Mittra ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Ultra Wideband ◽  
Manufacturing Technique

The Manufacturing Technique of Etruscan Mirrors

1957 ◽  
Vol 3 (2) ◽  
pp. 49-63 ◽  
Author(s):  
CARLO PANSERI ◽  
MASSIMO LEONI
Keyword(s):  
Manufacturing Technique

scholarly journals THE MERCURIO GUNFLINTS: A TECHNO-TYPOLOGICAL AND CULTURAL ASSESSMENT

2016 ◽  
Vol 96 ◽  
pp. 363-389 ◽  
Author(s):  
Paolo Biagi ◽  
Elisabetta Starnini ◽  
Carlo Beltrame
Keyword(s):  
Nineteenth Century ◽  
Northern Italy ◽  
Size And Shape ◽  
Manufacturing Technique ◽  
The North ◽  
Major Significance ◽  
Cultural Assessment ◽  
The Mediterranean ◽  
Napoleonic Era ◽  
Small Finds

The discovery of the wreck of the brig Mercurio, which sank in 1812 in the waters of the north Adriatic, is of major significance for the study of Italic Kingdom vessels from the Napoleonic era. The underwater excavations carried out in 2004–11 led to the recovery of many small finds, among which are several gunflints of different size and shape. The Mercurio gunflints were produced mainly from blades using a technique in use in Britain and France, but also in the workshops of the Lessini Hills around Ceredo (Verona province, northern Italy). We suggest that the flint employed for their manufacture probably came from Monte Baldo, in the Trentino, or perhaps from the River Tagliamento, in Friuli. We can exclude the possibility that the specimens recovered from the shipwreck were made from French flint because of the typically north Italian manufacturing technique and the character of the grey Treveti-derived flint. Given the complexity of the period during which the Grado (or Pirano) battle took place, the study of even such small items can contribute to a better interpretation of the dramatic events that characterised the beginning of the nineteenth century in that part of the Mediterranean.

scholarly journals Capsule design for the National Ignition Facility

1999 ◽  
Vol 17 (2) ◽  
pp. 217-224 ◽  
Author(s):  
T.R. DITTRICH ◽  
S.W. HAAN ◽  
M.M. MARINAK ◽  
D.E. HINKEL ◽  
S.M. POLLAINE ◽  
...  
Keyword(s):  
Dopant Concentration ◽  
Three Dimensions ◽  
Initial Surface ◽  
National Ignition Facility ◽  
X Ray ◽  
Ongoing Effort ◽  
Surface Finishes ◽  
Material Homogeneity ◽  
Indirect Drive ◽  
Reduced Scale

Several choices exist in the design and production of capsules intended to ignite and propagate fusion burn of the deuterium–tritium (D–T) fuel when imploded by indirect drive at the National Ignition Facility (NIF). These choices include ablator material, ablator dopant concentration and distribution, capsule dimensions, and X-ray drive profile (shock timings and strengths). The choice of ablator material must also include fabrication and material characteristics, such as attainable surface finishes, permeability, strength, transparency to radio frequency and infrared radiation, thermal conductivity, and material homogeneity. Understanding the advantages and/or limitations of these choices is an ongoing effort for LLNL and LANL designers. At this time, simulations in one-, two-, and three-dimensions show that capsules with either a copper-doped beryllium or a polyimide (C22H10N2O4) ablator material have both the least sensitivity to initial surface roughnesses and favorable fabrication qualities. Simulations also indicate the existence of capsule designs based on these ablator materials which ignite and burn when imploded by less than nominal laser performance (900-kJ energy, 250-TW power, producing 250-eV peak radiation temperature). We will describe and compare these reduced-scale capsules, in addition to several designs which use the expected 300-eV peak X-ray drive obtained from operating the NIF laser at 1.3 MJ and 500 TW.

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