Core-popping

Slipping through clamps, improper seizing, improper socketing or splicing, kinks, dog legs, and core popping. 

BIrd-cagIng or core-popping. Sudden unloading of line such as hitting fluid with excessive speed. Improper drilling motion or jar action. Use of sheaves of too small diameter or passing line around sharp bend. 

Figure 7.10 Transmission ioss spectrum of PC core POP. (From Tanaka, A., etai., Proc. SPIE, 840, 19, 1987. With permission.)...

Figure 7.13 Experimental 3 dB bandwidth for a PMMA core POP for different iaunching... 

In the present chapter, the role of the atmosphere in the distribution of POP in the European environments will be considered (Sect. 3). Data on atmospheric concentration and deposition collected between 2000 and 2009 shows that these compounds are still impacting the European ecosystems. Complementary data from sediment cores allows reconstruction of the historical input of these compounds into the European environments (Sect. 4). Both types of data sets are... 

Recognize that good interview questions seldom magically pop into your head during an interview — you cannot really listen to a candidate s answer to one question if you are trying to think up the next question at the same time. So it is always a good idea to develop in advance a written set of core questions fhaf you will ask every candidafe. 

Core vibrational frequencies obtained by Raman or resonance Raman spectrophotometric technique are summarized in Table V (53, 113, 116-118). The p(Pt—Pt) bands for the pop complexes [Pt2(pop)4] " (PtdDa), [Pt2(pop)4X] - (Ptdl,111)2), and [Pt2(pop)4X2] - (Pt(III)2) increase in the order expected from increasing Pt—Pt interaction (53). Resonance Raman spectra have been used frequently for the assignment of the electronic transitions of complexes as listed in the table. Also, observation of the vibrational structure in the low-temperature luminescence spectra coupled with the data in the table has been useful for considering the nature of the transition of these diplatinum complexes. The resonance Raman spectra at the intervalence band of the three mixed-valence complexes, which are stable only in the solid state, indicate that [Pt2(pop)4Cl] is a localized valence species and the bromo and iodo analogues are nearly delocalized valence species (53). 

Figure 21 X-ray elemental scanning maps using Mg K (a), Si K (b) and Ni K (c), plus backscattered electron images ((d) and (e)) of a typical type I porphyritic chondmle in the QUE 99177 CR2 chondrite, which has a forsterite-rich core, a porphyritic olivine-pyroxene rim (POP) and an outermost silica-rich rim (SIR). The Ni K map (c) shows that metallic Fe,Ni grains in the chondrule core are richer in nickel than those in the outer portions. The zoned stmcture of the chondrule can be explained by gas-melt fractional condensation or gas-solid condensation followed...

The partial meltdown of the reactor core at Three Mile Island nuclear power plant was mainly due to human error (Heppenheimer, 2002). On March 28, 1979, maintenance workers were cleaning sludge from a small pipe when they inadvertently blocked the flow of cooling water. Heat in the core flashed some water into steam and the resulting pressure surge popped a relief valve. Emergency pumps started up to restore water flow, but two valves to the reactor core had been left closed. The water poured, instead, out of the relief valve. Unaware of the open valve, and... 

Single mode glass fiber is widely used in the trunk area of the telecommunication system and the optical fiber system is expected to extend to the subscriber area and the network in building, offices, and homes. However, use of the single mode glass fiber system in short distance network is not necessarily suitable because it requires the precise handling and connection due to the small core size (5-10 [im) and thus it would be expensive in broadband residential area network, ATM-LAN, interconnection, etc. In contrast, polymer optical fiber (POP) which has more than 500 jim of core is promising candidate to solve such problems. 

Figure 15. Case B7. Stereoptical microscope images of the gold-coated molar unit that broke off the end. The initial starting point of fracture is in the upper left in (a). A thermal crack popped in more than halfway through the piece as shown by the first set of arrows Final fracture radiated in steps outwards towards the lingual side as shown by the second set of arrows, (b) shows a close-up of the origin site A. The core ceramic had some surface irregularities in the surface including waviness. The veneer also had grinding-adjustments that penetrated through the veneer into the core ceramic.

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