Trawling in bathyal and abyssal depths of the Venezuela Basin by USNS BARTLETT produced 107 specimens in four species of the anomuran genus Munidopsis (Galatheidae), and 6 specimens of the brachyuran ...crab Ethusina abyssicola (Doripiidae). Taxonomic analysis shows that Munidopsis aries (A. Milne Edwards 1880) is a senior synonym of Munidopsis sundi Sivertsen and Holthuis 1956, and that Munidopsis geyeri Pequegnat and Pequegnat 1970 is not synonymous with Munidopsis subsquamosa Henderson 1885 as recently suggested by Ambler (1980). Biological data on gut contents, sediment preference, and parasitism are provided for these species, as well as for Munidopsis bermudezi Chace 1939 and Munidopsis crassa Smith 1885. The question of deep sea basin endemicity is considered in relation to the known Atlantic distribution of the species; primary isolating mechanisms seem to be both geological and chronological in origin.
Currently, many electrical applications use brushless DC motors (BLDCs) and DC motors. However, recently, switched reluctance motors (SRMs) have become the best replacement for traditional motors and ...BLDC motors due to the high efficiency, fault tolerance, minimized cost and varying speed. Motors with switching reluctance (SRMs) are used in many industries such as the automation and aerospace as they have great torque. It lacks windings on the side of the rotor. For the Alternating current or the direct current drives, it is the customer's first choice due to its maintenance is easy. The main advantage of motors with the switch reluctance whose construction is simple. In starting it shows the characteristics and structure parameters of performance analysis of S.R.M. Then next a simulation and method of modeling is shown in the paper. The output result of this system is shown in gate pulse for 4 phase.
On April 5, 2019, while the Parker Solar Probe was at its 35 solar radius perihelion, the data set collected at 293 samples/sec contained more than 10,000 examples of spiky electric-field-like ...structures having durations less than 200 milliseconds and amplitudes greater than 10 mV/m. The vast majority of these events was caused by plasma turbulence. Defining dust events as those having similar, narrowly peaked, positive, single-ended signatures, resulted in finding 135 clear dust events, which, after correcting for the low detection efficiently, resulted in an estimate consistent with the 1000 dust events expected from other techniques. Defining time domain structures (TDS) as those having opposite polarity signals in the opposite antennas resulted in finding 238 clear TDS events which, after correcting for the detection efficiency, resulted in an estimated 500-1000 TDS events on this day. The TDS electric fields were bipolar, as expected for electron holes. Several events were found at times when the magnetic field was in the plane of the two measured components of the electric field such that the component of the electric field parallel to the magnetic field was measured. One example of significant parallel electric fields shows the negative potential that classified them as electron holes. Because the TDS observation rate was not uniform with time, it is likely that there were local regions below the spacecraft with field-aligned currents that generated the TDS.
Propositional modal provability logics like G and Grz have arithmetical interpretations where □φ can be read as ‘formula φ is provable in Peano Arithmetic’. These logics are decidable but are ...characterized by classes of Kripke frames which are not first‐order definable. By abstracting the aspects common to their characteristic axioms we define the notion of a formula generation map F(P) in one propositional variable. We then focus our attention on the properly displayable subset of all (first‐order definable) Sahlqvist modal logics. For any logic L from this subset, we consider the (provability) logic LF obtained by the addition of an axiom based upon a formula generation map F(P) so that LF = L + F(P). The class of such logics includes G and Grz. By appropriately modifying the right introduction rules for □, we give (not necessarily cut‐free) display calculi for every such logic. We define the pseudo‐displayable subset of these logics as those whose display calculi enjoy cut‐elimination for sequents of the form ⊤ ⊢ φ for any formula φ. We then show that for any provability logic LF having a conservative tense extension, there is a map f on formulae such that LF is pseudo‐displayable if and only if f maps theorems of LF to theorems of the underlying logic L and vice versa. By using a standard renaming technique we can guarantee that there is a polynomial‐time translation from LF into L. All proofs are purely syntactic and show the versatility of display calculi since similar results using traditional Gentzen calculi are not possible for as broad a range of logics and require further conditions. Our maps generalize previously known maps from G into K4. An application of our results gives an O(n.log n)3) translation from the (‘second order’) provability logic Grz into a decidable subset of first‐order logic. Since each of our logics L is a Sahlqvist logic, it is first‐order definable, and hence each L has a translation into first‐order logic. Our results therefore show that all pseudo‐displayable logics LF are ‘essentially first‐order’ even though their characteristic axiom may not be first‐order definable.
We define display calculi for nominal tense logics extending the minimal nominal tense logic (MNTL) by addition of primitive axioms. To do so, we use the natural translation ofMNTL into the minimal ...tense logic of inequality (L≠) which is known to be properly displayable by application of Kracht's results. The rules of the display calculus δMNTL for MNTL mimic those of the display calculus δL≠ for L≠. We show that every MNTL‐valid formula admits a cut‐free derivation in δMNTL. We also show that a restricted display calculus δ−MNTL, is not only complete for MNTL, but that it enjoys cut‐elimination for arbitrary sequents. Finally, we give a weak Sahlqvist‐type theorem for two semantically defined extensions of MNTL. Using Kracht's techniques we obtain sound and complete display calculi for these two extensions based upon δMNTL and δ−MNTL respectively. The display calculi based upon δMNTL enjoy cut‐elimination for valid formulae only, but those based upon δ−MNTL enjoy cut‐elimination for arbitrary sequents.
1. Artichoke tuber tissue contained RNA polymerase activity bound to the chromatin and in the supernatant after chromatin sedimentation. 2. The activity in the supernatant, the soluble polymerase, ...was fractionated into polymerases I and II by DEAE-cellulose chromatography, and the properties of each activity were determined. 3. The proportions of chromatin-bound and soluble activities varied with growth of the tissue, and there was a correlation between chromatin-bound activity and RNA accumulation. 4. The properties of the solubilized chromatin activity were compared with those of the soluble activity, and the relationship between these two activities is discussed.
Horizontal dislocation of the patella Gore, D R
JAMA : the journal of the American Medical Association,
11/1970, Letnik:
214, Številka:
6
Journal Article
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