Alien Registration- Delong, Roy C. (Blaine, Aroostook County)

https://digitalmaine.com/alien_docs/27369/thumbnail.jp

Characterization of unicompositional GaInP2 ordering heterostructures grown by variation of V/III ratio

Journal ArticlePhotoluminescence (PL) and photoluminescence excitation (PLE) spectroscopies are employed to investigate single heterostructures based on two GaInP2 layers that have the same composition but different degrees of order on the cation sublattice. Four sample configurations are studied: two complementary single heterostructures, a more ordered layer grown on a less ordered layer and vice versa, and two single layers nominally equivalent to the constituent layers of the heterostructures. The degree of order of the two layers was controlled via the V/III ratio used during organometallic vapor phase epitaxial growth. From our measurements, the difference between the band gaps of the two layers is 20-30 meV. The PLE spectra show clearly that the emission comes from both layers of the heterostructures and that the PL is excited by direct absorption of the exciting light into each layer as well as the injection of carriers from the less ordered (higher band gap) layer into the more ordered (lower band gap) layer. The data clearly show that the heterostructures contain two layers, each very similar to the corresponding single layer sample

SETBP1 Mutations as a Biomarker for Myelodysplasia /Myeloproliferative Neoplasm Overlap Syndrome

Myelodysplasia (MDS) /myeloproliferative neoplasm (MPN) overlap syndrome has been described since the 2001 WHO classification as disorders that have both proliferative and dysplastic changes simultaneously. Specific disorders include chronic myelomonocytic leukemia (CMML), juvenile myelomonocytic leukemia (JMML), BCR-ABL negative atypical chronic myeloid leukemia (aCML) and unclassifiable MDS/MPN (MPN/MDS-U). Recurrent gene mutations in these conditions have been described. Among them, SETBP1 mutations have been identified in up to 32% of aCML, 24% of JMML, 18% of CMML and 10% of MDS/MPN-U patients. The mutation hotspot lies in the amino acid residues 858-871 in the SETBP1 protein. SETBP1 mutations in MDS/MPN overlap syndrome is associated with accelerated transformation to leukemia and poor prognosis. In this review, we summarized the latest data on the role of SETBP1 mutations in the overlap syndrome. SETBP1 mutations may serve as a biomarker for the diagnosis and poor prognosis of the overlap syndrome

Non-Fermi-liquid behavior in nearly ferromagnetic metallic SrIrO3 single crystals

We report transport and thermodynamic properties of single-crystal SrIrO3 as a function of temperature T and applied magnetic field H. We find that SrIrO3 is a non-Fermi-liquid metal near a ferromagnetic instability, as characterized by the following properties: (1) small ordered moment but no evidence for long-range order down to 1.7 K; (2) strongly enhanced magnetic susceptibility that diverges as T or T1/2 at low temperatures, depending on the applied field; (3) heat capacity C(T,H) ~ -Tlog T that is readily amplified by low applied fields; (4) a strikingly large Wilson ratio at T< 4K; and (5) a T3/2-dependence of electrical resistivity over the range 1.7 < T < 120 K. A phase diagram based on the data implies SrIrO3 is a rare example of a stoichiometric oxide compound that exhibits non-Fermi-liquid behavior near a quantum critical point (T = 0 and H = 0.23 T)

Tuning Jeff = 1/2 Insulating State via Electron Doping and Pressure in Double-Layered Iridate Sr3Ir2O7

Sr3Ir2O7 exhibits a novel Jeff=1/2 insulating state that features a splitting between Jeff=1/2 and 3/2 bands due to spin-orbit interaction. We report a metal-insulator transition in Sr3Ir2O7 via either dilute electron doping (La3+ for Sr2+) or application of high pressure up to 35 GPa. Our study of single-crystal Sr3Ir2O7 and (Sr1-xLax)3Ir2O7 reveals that application of high hydrostatic pressure P leads to a drastic reduction in the electrical resistivity by as much as six orders of magnitude at a critical pressure, PC = 13.2 GPa, manifesting a closing of the gap; but further increasing P up to 35 GPa produces no fully metallic state at low temperatures, possibly as a consequence of localization due to a narrow distribution of bonding angles {\theta}. In contrast, slight doping of La3+ ions for Sr2+ ions in Sr3Ir2O7 readily induces a robust metallic state in the resistivity at low temperatures; the magnetic ordering temperature is significantly suppressed but remains finite for (Sr0.95La0.05)3Ir2O7 where the metallic state occurs. The results are discussed along with comparisons drawn with Sr2IrO4, a prototype of the Jeff = 1/2 insulator.Comment: five figure

The Portable Floor Plate Brooder

To avoid being caught in the squeeze between lower prices and higher cost, poultrymen have been forced to seek more efficient methods of raising poultry. This is especially true in South Dakota where poultry is usually one phase of a diversified farm operation. The average farmer has not been able to depend upon a large volume to reduce the cost per unit. The cold climate is a further handicap to the farmer of South Dakota. He cannot overlook the most economical methods of brooding. For this reason there has been considerable interest in the floor plate brooder and its adaptability to this area

Parmenides' Theistic Metaphysics

The primary interpretative challenge for understanding Parmenides’ poem revolves around explaining both the meaning of, and the relationship between, its two primary sections: a) the positively endorsed metaphysical arguments which describe some unified, unchanging, motionless, and eternal “reality” (Aletheia), and b) the ensuing cosmology (Doxa), which incorporates the very principles explicitly denied in Aletheia. I will refer to this problem as the “A-D Paradox.” I advocate resolving this paradoxical relationship by reading Parmenides’ poem as a ring-composition, and incorporating a modified version of Palmer’s modal interpretation of Aletheia. On my interpretation, Parmenides’ thesis in Aletheia is not a counter-intuitive description of how all the world (or its fundamental, genuine entities) must truly be, but rather a radical rethinking of divine nature. Understanding Aletheia in this way, the ensuing “cosmology” (Doxa) can be straightforwardly rejected as an exposition of how traditional, mythopoetic accounts have misled mortals in their understanding of divinity. Not only does this interpretative view provide a resolution to the A-D Paradox, it offers a more holistic account of the poem by making the opening lines of introduction (Proem) integral to understanding Parmenides’ message. By setting forth its own unacceptable fiction, paralleling the elements of the Doxa in a ring-composition, the Proem simultaneously establishes the scope of the ensuing inquiry (divinity itself), and its target (traditional accounts of divinity). Maintaining Parmenides’ historical position as the “father of metaphysics,” the narrative that he advanced a strictly secular account of all reality is challenged. Instead, Parmenides is best understood as further advancing Xenophanes’ criticisms of traditional religion, an intellectual relationship which the ancient testimonia strongly supports

Parmenides 1.31-32 and the Status of Opinion: A Case for the Negative Reading on Orthodox and Unorthodox Arrangements

While the meaning of lines 31-32 of Fragment 1 (DK 1.31-32) in Parmenides' epic-style poem seem to have significant implications for the overall argument of the poem, attempts to understand them have resulted in generations of interpretative deadlock. After considering the problem, I argue that the best way to make sense of these lines in relation to the overall poem is to hold that Parmenides consistently holds mortal opinions in low-regard, and that the third section of the poem (Opinion) should be far more limited in scope than has been traditionally thought. Not only is this negative reading preferable on the traditional arrangement of the poem, but the case for it is significantly strengthened on certain suggested rearrangements of the poem--rearrangements which are strongly supported independently of any interpretative commitments. In what follows, readers will first find: a) an introduction to the overall poem, b) a survey and analysis of the variant Greek texts and modern translations of lines 31-32, and c) an explication of the primary interpretative dilemma modern commentators face in interpreting these lines. This provides both an in-depth summary and review of the literature on this particular topic, filling an important lacuna in the literature. With these considerations in hand, the essay will turn to its secondary aim--considering how the interpretative dilemma might best be resolved. The relevant challenges for both positive and negative readings are considered under the traditional ordering (Diels-Kranz) of the poem. Having established the negative reading of lines 1.31-32 to be preferable on the traditional arrangement, several recently proposed rearrangements are considered, in terms of what impacts the arguments for their respective changes to the poem, if acceptable, might have for our understanding of these problematic lines and the negative reading. Again, it is concluded that the particular arguments for rearrangement that are considered can only aid the negative reading