Quark-composites approach to QCD

We present a perturbative approach to QCD based on quark composites, that is barions and mesons, as fundamental variables.Comment: 4 pages LaTeX, to appear in the proceedings of ``Path Integrals from peV to TeV'', Florence-Italy, August 25-29, 199

Finite temperature QCD in the quark-composites approach

We investigate QCD at finite temperature in the quark composites approach, which is based on the use of quark composites with hadronic quantum numbers as fundamental variables. We find that chiral symmetry restoration and quark deconfinement are one and the same first order phase transition, whose critical temperature, in a one loop approximation, is $T= 2\sqrt{\Omega} \rho^{-2}m_{\pi}$, where $m_{\pi}$ is the pion mass, $\Omega=24$ the number of up and down quark components, and $\rho$ a parameter of order 1 whose precise value can be determined by the study of the pion-pion interaction.Comment: LaTex, 5 page

Ballistic one-dimensional holes with strong g-factor anisotropy in germanium

We report experimental evidence of ballistic hole transport in one-dimensional quantum wires gate-defined in a strained SiGe/Ge/SiGe quantum well. At zero magnetic field, we observe conductance plateaus at integer multiples of 2e2/h. At finite magnetic field, the splitting of these plateaus by Zeeman effect reveals largely anisotropic g-factors with absolute values below 1 in the quantum-well plane, and exceeding 10 out-of-plane. This g-factor anisotropy is consistent with a heavy-hole character of the propagating valence-band states, which is in line with a predominant confinement in the growth direction. Remarkably, we observe quantized ballistic conductance in device channels up to 600 nm long. These findings mark an important step toward the realization of novel devices for applications in quantum spintronics

Pathophisiology of Sickle Cell Disease and New Drugs for the Treatment

A homozygous mutation in the gene for β globin, a subunit of adult hemoglobin A (HbA), is the proximate cause of sickle cell disease (SCD). Sickle hemoglobin (HbS) shows peculiar biochemical properties, which lead to polymerizing when deoxygenated. HbS polymerization is associated with a reduction in cell ion and water content (cell dehydration), increased red cell density which further accelerate HbS polymerization. Dense, dehydrated erythrocytes are likely to undergo instant polymerization in conditions of mild hypoxia due to their high HbS concentration, and HbS polymers may be formed under normal oxygen pressure. Pathophysiological studies have shown that the dense, dehydrated red cells may play a central role in acute and chronic clinical manifestations of sickle cell disease, in which intravascular sickling in capillaries and small vessels leads to vaso-occlusion and impaired blood flow in a variety of organs and tissue. The persistent membrane damage associated with HbS polymerization also favors the generation of distorted rigid cells and further contributes to vaso-occlusive crisis (VOCs) and cell destruction in the peripheral circulation. These damaged, dense sickle red cells also show a loss of phospholipid asymmetry with externalization of phosphatidylserine (PS), which is believed to play a significant role in promoting macrophage recognition with removal of erythrocytes (erythrophagocytosis). Vaso-occlusive events in the microcirculation result from a complex scenario involving the interactions between different cell types, including dense, dehydrated sickle cells, reticulocytes, abnormally activated endothelial cells, leukocytes, platelets and plasma factors such as cytokine and oxidized pro-inflammatory lipids. Hydroxycarbamide (hydroxyurea) is currently the only drug approved for chronic administration in adult patients with sickle cell disease to prevent acute painful crises and reduce the incidence of transfusion and acute chest crises. Here, we will focus on consolidated and experimental therapeutic strategies for the treatment of sickle cell disease, including: agents which reduce or prevent sickle cell dehydrationagents which reduce sickle cell-endothelial adhesive eventsnitric oxide (NO) or NO-related compoundsanti-oxidant agent

" Le jansénisme face à la tentation thomiste. Antoine Arnauld et le thomisme de gratia après les cinq Articles de 1663 "

International audienceÀ partir des années 1650, la querelle catholique de la grâce voit l'affrontement de trois partis théologiques, celui des jésuites, acquis au molinisme, celui des dominicains, défenseurs du thomisme, et celui des jansénistes, partisans d'un retour au strict augustinisme mais soucieux également de se défendre des accusations d'hérésie en mettant en avant leur conformité au thomisme. Le présent article tente de suivre l'évolution philothomiste d'Antoine Arnauld (1612-1694) en exil après la rupture de la Paix de l'Église. À l'évidence, le docteur janséniste ne pardonne pas aux dominicains leur supposée passivité à l'égard des molinistes ; il finit même par se prétendre plus pur thomiste que les disciples attitrés de saint Thomas

Fénelon et la notion thomiste de prémotion physique. Le thomisme moderne au tribunal du molinisme

http://rhr.revues.org/7714As a Molinist, Fénelon never ceased to combat the assimilation of Jansenism to Thomism, which Jansenists used in order to discredit Roman condemnations against them. He was so fierce that his contemporaries wondered if he wished to proscribe the Thomist theses as well as Jansenism. Some, on the other hand, esteemed that Fénelon drew closer to Thomism when he acknowledged the orthodoxy of the thesis regarding physical premotion, a notion that Thomists used to characterize divine aide given to a will in action. Congruism and Thomism are, in the end, the only two systems in which Fénelon recognizes full orthodoxy. More precisely, in his view, true Thomism is only orthodox in that it is close to Congruism.Moliniste, Fénelon n'a cessé de combattre l'assimilation du jansénisme au thomisme dont les jansénistes se servaient pour discréditer les condamnations romaines à leur encontre. Il a été si acharné que les contemporains se sont demandé s'il n'avait pas voulu proscrire les thèses thomistes en même temps que le jansénisme. Certains ont au contraire estimé que Fénelon s'était rapproché du thomisme en reconnaissant l'orthodoxie de la thèse de la prémotion physique, notion par laquelle les thomistes caractérisaient le secours divin octroyé à une volonté en acte. Congruisme et thomisme sont finalement les deux seuls systèmes auxquels Fénelon reconnaisse une pleine orthodoxie. Davantage, pour lui, le vrai thomisme n'est orthodoxe que parce qu'il est proche du congruisme

COMMUNITY INTEGRATION THROUGH COOPERATIVE EDUCATION (CICE): A POST-SECONDARY WORLD FIT FOR ALL

Students with developmental disabilities are a growing and diverse population. Higher education landscapes are becoming increasingly complex. Despite academic and personal supports available to all Ontario college students through student services centers, Marshall College (a pseudonym) is experiencing a disconnect between the stated vision, mission, and values and the Community Integration Through Cooperative Education (CICE) program and its students. Diverse views have polarized senior administration, faculty, and staff on how to adapt to having students with developmental disabilities accessing post-secondary education through the CICE program. This Organizational Improvement Plan explores the organizational context of Marshall College and proposes an improvement plan to address the problem of practice, which is how to improve the lack of integration experienced by the CICE program and its students. As the faculty coordinator of the CICE program, I have created a change improvement plan to guide the change process. The problem of practice is framed with the interpretivist, social constructivism epistemology, and Capper’s (2019) Disabilities Studies in Education epistemology. The plan’s predominant leadership frameworks, transformational and authentic leadership, combined with Kotter’s (1996, 2012) eight-step change model is used to create a plan of action that encompasses key stakeholders with well-defined roles and responsibilities to enact the proposed change. The plan-do-study-act cycle is used to monitor and evaluate the plan and I incorporate detailed plans for communicating the need for change while ensuring collaboration amongst all stakeholders. I conclude with a pathway forward within this institution and set the groundwork for future change. Keywords: developmental disabilities, integration, post-secondary education, transformational leadership, authentic leadershi