11,168 research outputs found
Set mapping reflection
In this note we will discuss a new reflection principle which follows from
the Proper Forcing Axiom. The immediate purpose will be to prove that the
bounded form of the Proper Forcing Axiom implies both that 2^omega = omega_2
and that L(P(omega_1)) satisfies the Axiom of Choice. It will also be
demonstrated that this reflection principle implies that combinatorial
principle Square(kappa) fails for all regular kappa > omega_1.Comment: 11 page
Scales for co-compact embeddings of virtually free groups
Let be a group which is virtually free of rank at least 2 and let
be the family of totally disconnected, locally
compact groups containing as a co-compact lattice.
We prove that the values of the scale function with respect to groups in
evaluated on the subset have only finitely
many prime divisors. This can be thought of as a uniform property of the family
.Comment: 12 pages; key words: uniform lattice, virtually free group, totally
disconnected group, scale function (Error in references corrected in version
2
Molecular mechanism of dominant expression in 3-methylcrotonyl-CoA carboxylase deficiency
Summary: Most enzyme deficiencies in humans are inherited as autosomal recessive traits. The term dominant negative is applied to mutant alleles in which a mutant protein interferes in one way or another with the function of the normal protein being produced from the wild-type allele in a heterozygote. Such a dominant negative effect usually involves homomeric or heteromeric proteins. 3-Methylcrotonyl-CoA carboxylase (MCC) is a heteromeric mitochondrial enzyme comprised of biotin containing MCCα subunits and smaller MCCβ subunits, encoded by the genes MCCA and MCCB, respectively. Mutations in these genes cause isolated MCC deficiency, an autosomal recessive disorder with a variable phenotype ranging from severe neonatal to asymptomatic adult forms. Patients with MCC deficiency have a characteristic organic aciduria with greatly increased excretion of 3-hydroxyisovaleric acid (3-HIVA) and 3-methylcrotonyl-glycine (3-MCG). Here, two patients with elevated excretion of 3-MCG and 3-HIVA and partial deficiency of MCC are discussed, one of them with severe neurological symptoms. Both showed evidence of biotin responsiveness and were heterozygous for the missense mutation MCCA-R385S. Evidence is presented that MCCA-R385S is a dominant negative allele leading to biochemical abnormalities and clinical symptoms in heterozygous individuals and that it is responsive to pharmacological doses of biotin in viv
Fork stamping of pristine carbon nanotubes onto ferromagnetic contacts for spin-valve devices
We present a fabrication scheme called 'fork stamping' optimized for the dry
transfer of individual pristine carbon nanotubes (CNTs) onto ferromagnetic
contact electrodes fabricated by standard lithography. We demonstrate the
detailed recipes for a residue-free device fabrication and in-situ current
annealing on suspended CNT spin-valve devices with ferromagnetic Permalloy (Py)
contacts and report preliminary transport characterization and
magnetoresistance experiments at cryogenic temperatures. This scheme can
directly be used to implement more complex device structures, including
multiple gates or superconducting contacts.Comment: 7 pages, 4 figures, submitted to IWEPNM 2015 conference proceedings
(physica status solidi (b)
The Perceived Effect of Time on HIV/AIDS Identity Incorporation
Individuals experience disease in a variety of contexts. In this study, I examined how the temporal context (e.g., historical time, social time, chronological age and the passage of time) affected the incorporation of the HIV/AIDS identity into the self. I used semi structured interviews to collect data from 36 individuals living with HIV/AIDS. Historical time did little to influence the initial reaction to the diagnosis. Chronological age shaped the initial reaction to the diagnosis for some participants. Social time affected immersion in the HIV/AIDS community and the passage of time influenced the integration of the HIV/AIDS identity into the self. The findings add depth to extant studies on the incorporation of the HIV/AIDS identity into the self
Narrative Analysis: Uncovering the Truth of Stories
The use of narratives as a data source has come under scrutiny (Phillips,1994, 1997). The purpose of this session will be to discuss truth as it relates to narratives and to demonstrate methods of narrative analysis using data from a study concerning identity formation in HIV-positive adults
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