2,099 research outputs found
A return to first principles in unjust enrichment: Kerr v. Baranow
No full textThe article focuses on the advances made by the Supreme Court of Canada in the law of unjust enrichment on the case of Kerr versus Baranow which was clarified by Cromwell J. by returning to the first principles of unjust enrichment. The author states that the failure of the court to recognize the similarities between resulting trusts and restitution is regrettable. He states that the joint family venture concept of Cromwell J. that is dissociated from unjust enrichment is successful
Austin Papers: Series III, 1829
No full textCopy of transcript for a letter from Daniel J. Toler and Allen Reynold to Stephen F. Austin concerning lands purchased by Toler and Reynold from Peter Kerr
International Harmonization and the Gains from Trade
No full textInternational harmonization of standards and regulations is often a goal expressed in trade agreements because it is expected to yield gains from trade. Absence of progress toward harmonization is often interpreted as being motivated by protectionism, with differences in standards and regulations seen as non-tariff barriers. While protectionism may well be the source of resistance to harmonization, there may be other reasons it is not pursued. These alternative explanations have not received much attention from economists. In this article some of these alternatives are outlined - demand effects from altering standards, switching costs, proprietary technologies. The article concludes that proposals for international harmonization need to be scrutinized carefully.demand effects, harmonization, regulation, standards, switching costs, TBT, International Relations/Trade,
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Classical and thermodynamic stability of black holes
No full textWe consider the stability of black holes within both classical general relativity and
the semiclassical thermodynamic description. In particular, we study linearised perturbations and their contributions to the gravitational partition function. Exploring the connection between classical and thermodynamic stability, we find classical instabilities and new families of vacuum black holes.
We start by studying negative modes of black hole partition functions, which represent pathologies in the one-loop quantum corrections. In particular, we extend this study to charged black holes (Reissner-Nordstr¨om), using a method based on gauge-invariant perturbations, and to rotating black holes (Kerr-AdS), where a numerical technique is employed. In the both cases, we find a negative mode in the region where local thermodynamic stability fails, as expected.
We then present the first examples of linearised classical instabilities of vacuum
asymptotically flat black holes. We analyse numerically perturbations of Myers-Perry
solutions, both in the single spin and in the equal spins (odd D) cases. For sufficiently
high rotation, in the so-called ultraspinning regime, new negative modes of the partition function may arise whose threshold marks both the onset of a classical instability of the black hole (not just of the associated black branes) and the bifurcation to a new family of black hole solutions. In the case of singly-spinning solutions, we find the threshold stationary modes signalling the instabilities, confirming a conjecture by Emparan and Myers. In the case of solutions with equal spins, we are able to find perturbations that grow exponentially in time in D = 9 (we believe that this extends to higher odd D).
Furthermore, the new family of solutions bifurcating at the onset of the instability should have a single rotational symmetry, saturating the rigidity theorem
Isolation of steroidal glycosides from the Caribbean SpongePandaros acanthifolium
No full textFour new steroidal glycosides, acanthifoliosides G-J (1-4), were isolated as minor constituents from the Caribbean marine sponge Pandaros acanthifolium. These metabolites are characterized by a highly oxygenated D ring and the presence of a disaccharide rhamnose-glucose residue and a rhamnose at positions C-3 and C-15, respectively. Their structures were established on the basis of extensive interpretation of 1D and 2D NMR data and HRESIMS analyses. The absolute configurations of the glucose and rhamnose sugars were determined by preparing aldose o-tolylthiocarbamate derivatives and comparison to authentic standards by LC/HRESIMS. Acanthifolioside G (1) exhibited antioxidant and cytoprotective activities
Petaurus norfolcensis
No full textSciurus norfolcensis Kerr, 1792 (Figs 93-95) Sciurus norfolcensis Kerr, 1792: 270. COMMON NAME. — Squirrel Glider. CURRENT NAME. — Petaurus norfolcensis (Kerr, 1792). See Jackson & Groves (2015: 112). COLLECTOR/S. — No data. COLLECTION LOCALITY. — No data. COMMENT. — Probably observed near Port Jackson (Sydney), New South Wales, Australia. COLLECTION DATE. — Between 20 June and 18 November 1802. SPECIMEN NUMBER/S. — No data. ILLUSTRATIONS. — Illustrated by Lesueur – Muséum d’Histoire naturelle du Havre, Inv. no. 80278 (Fig. 93; skull, second from left), Inv. no. 80087 and 80088 (Figs 94; 95; one living animal).Published as part of Jackson, Stephen M., Jansen, Justin J. F. J., Baglione, Gabrielle & Callou, Cécile, 2021, Mammals collected and illustrated by the Baudin Expedition to Australia and Timor (1800 - 1804): A review of the current taxonomy of specimens in the Muséum national d'Histoire naturelle de Paris and the illustrations in the Muséum d'Histoire naturelle du Havre, pp. 387-548 in Zoosystema 43 (21) on page 407, DOI: 10.5252/zoosystema2021v43a21, http://zenodo.org/record/514297
General hidden conformal symmetry of 4D Kerr-Newman and 5D Kerr black holes
No full textThere are two known CFT duals, namely the J-picture and the Q-picture, for a four-dimensional Kerr-Newman black hole, corresponding to the angular momentum J and the electric charge Q respectively. In our recent study we found a one-parameter class of CFT duals for extremal Kerr-Newman black hole, connecting these two pictures. In this paper we study these novel CFT duals for the generic non-extremal Kerr-Newman black hole. We investigate the hidden conformal symmetry in the low frequency scattering off Kerr-Newman black hole, from which the dual temperatures could be read. We find that there still exists a hidden conformal symmetry for a general CFT dual. We reproduce the correct Bekenstein-Hawking entropy from the Cardy formula, assuming the form of the central charge being invariant. Moreover we compute the retarded Green's function in the general CFT dual picture and find it is in good match with the CFT prediction. Furthermore we discuss the hidden conformal symmetries of the five dimensional Kerr black hole and obtain the similar evidence to support the general dual CFT pictures.Physics, Particles & FieldsSCI(E)0ARTICLE8nul
Recession, International Trade and the Fallacies of Composition
No full textA truly global recession has not been manifest since the Great Depression of the 1930s. As a result, the multilateral institutions put in place at the end of the Second World War to ensure that a major depression never happened again have not been tested. One of the lessons of the Great Depression was that governments had a major role to play in managing the economy. The use of subsidies to affect economic outcomes was one manifestation of this expanded role. In a recession, sector specific subsidies will likely be requested by firms. Subsidies can distort trade, leading to the potential for beggar thy neighbour subsidy wars. Subsidies will be difficult to discipline in a global recession.beggar thy neighbour, deficits, paradox of thrift, recession, subsidies, International Relations/Trade,
Polynomial rings over Goldie-Kerr commutative rings
No full textAll rings in this paper are commutative, and
acc
⊥
\operatorname {acc} \bot
(resp.,
acc
⊕
\operatorname {acc} \, \oplus
) denotes the acc on annihilators (resp., on direct sums of ideals). Any subring of an
acc
⊥
\operatorname {acc} \bot
ring, e.g., of a Noetherian ring, is an
acc
⊥
\operatorname {acc} \bot
ring. Together,
acc
⊥
\operatorname {acc} \bot
and
acc
⊕
\operatorname {acc} \, \oplus
constitute the requirement for a ring to be a Goldie ring. Moreover, a ring
R
R
is Goldie iff its classical quotient ring
Q
Q
is Goldie. A ring
R
R
is a Kerr ring (the appellation is for J. Kerr, who in 1990 constructed the first Goldie rings not Kerr) iff the polynomial ring
R
[
x
]
R[x]
has
acc
⊥
\operatorname {acc} \bot
(in which case
R
R
must have
acc
⊥
\operatorname {acc} \bot
). By the Hilbert Basis theorem, if
S
S
is a Noetherian ring, then so is
S
[
x
]
S[x]
; hence, any subring
R
R
of a Noetherian ring is Kerr. In this note, using results of Levitzki, Herstein, Small, and the author, we show that any Goldie ring
R
R
such that
Q
=
Q
c
(
R
)
Q = {Q_c}(R)
has nil Jacobson radical (equivalently, the nil radical of
R
R
is an intersection of associated prime ideals) is Kerr in a very strong sense:
Q
Q
is Artinian and, hence, Noetherian (Theorems 1.1 and 2.2). As a corollary we prove that any Goldie ring
A
A
that is algebraic over a field
k
k
is Artinian, and, hence, any order
R
R
in
A
A
is a Kerr ring (Theorem 2.5 and Corollary 2.6). The same is true of any algebra
A
A
over a field
k
k
of cardinality exceeding the dimension of
A
A
(Corollary 2.7). Other Kerr rings are: reduced
acc
⊥
\operatorname {acc} \bot
rings and valuation rings with
acc
⊥
\operatorname {acc} \bot
(see 3.3 and 3.4).</p
Special and Differential Treatment: A Mechanism to Promote Development?
No full textMuch has been made of "special and differential" treatment in the Doha Development Round of WTO negotiations. In particular, a conscious effort has been made to infer that special and differential treatment will promote development. While special and differential treatment may be a necessary evil given developing countries' higher adjustment costs, dignifying it as a development mechanism plays into the hands of protectionist interests. In particular, by allowing a general increase in the ability of developing countries to isolate their economies, it may reduce the efficacy of important forces that prod institutional reforms in developing countries. As institutional reform is one of the keys to economic development, lionizing special and differential treatment in the WTO is likely to be counterproductive.development, institutional reform, protectionism, special and differential treatment, WTO, International Development,
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