Finite compressibility in the low-doping region of the two-dimensional t−Jt{-}J model

We revisit the important issue of charge fluctuations in the two-dimensional $t{-}J$ model by using an improved variational method based on a wave function that contains both the antiferromagnetic and the d-wave superconducting order parameters. In particular, we generalize the wave function introduced some time ago by J.P. Bouchaud, A. Georges, and C. Lhuillier [J. de Physique {\bf 49}, 553 (1988)] by considering also a {\it long-range} spin-spin Jastrow factor, in order to correctly reproduce the small-$q$ behavior of the spin fluctuations. We mainly focus our attention on the physically relevant region $J/t \sim 0.4$ and find that, contrary to previous variational ansatz, this state is stable against phase separation for small hole doping. Moreover, by performing projection Monte Carlo methods based on the so-called fixed-node approach, we obtain a clear evidence that the $t{-}J$ model does not phase separate for $J/t \lesssim 0.7$ and that the compressibility remains finite close to the antiferromagnetic insulating state.Comment: 10 page

Designing a New Model for Clinical Education: An Innovative Approach.

To keep pace with the ever-changing health care delivery system, it is important to transform the way future nurses are educated, both in classroom and in clinical settings, to care for people along the life and care continuum, not only in acute-care settings. The purpose of this article is to describe a new approach to educating baccalaureate nursing students using immersion practicums that expose students to population health, transitions of care, care coordination, and the multiple roles a nurse engages in along the continuum. The curriculum includes 5 immersions, each with a specific life and care continuum focus to develop anticipatory thinkers

A Retrospective Analysis of Nursing Students\u27 Clinical Experience in an All-Male Maximum Security Prison.

Prisons provide an ideal learning experience to prepare prelicensure students with the knowledge and skill set needed for practice in the 21st century. Beginning descriptive evidence demonstrates that correctional health is an innovative community resource to educate nursing students in today\u27s changing model of health care delivery and practice. This article shares results from a retrospective analysis of the perceptions and experiences of nursing students during their community clinical rotation in an all-male maximum security prison

Reply to "Comment on 'Scaling of the linear response in simple ageing systems without disorder' "

The value of the non-equilibrium exponent $a$ is measured in the two-dimensional (2D) Ising model quenched to below criticality from the dynamical scaling of the zero-field-cooled and the intermediate susceptibility. Our results fully reconfirm the expected value $a=1/2$ but are inconsistent with the value $a=1/4$, advocated by Corberi, Lippiello and Zannetti (cond-mat/0506139).Comment: 3 pages, 2 figures, submitted to Phys. Rev.

Disentangling Scaling Properties in Anisotropic Fracture

Structure functions of rough fracture surfaces in isotropic materials exhibit complicated scaling properties due to the broken isotropy in the fracture plane generated by a preferred propagation direction. Decomposing the structure functions into the even order irreducible representations of the SO(2) symmetry group (indexed by $m=0,2,4...$) results in a lucid and quickly convergent description. The scaling exponent of the isotropic sector ($m=0$) dominates at small length scales. One can reconstruct the anisotropic structure functions using only the isotropic and the first non vanishing anisotropic sector ($m=2$) (or at most the next one ($m=4$)). The scaling exponent of the isotropic sector should be observed in a proposed, yet unperformed, experiment.Comment: 5 pages, 8 figure

Creating a new education paradigm to prepare nurses for the 21st Century

Nurse educators are accountable to keep baccalaureate education responsive to the ever changing healthcare delivery environment. The changing context of healthcare delivery requires focusing on population health and social determinants, providing interprofessional, team-based care, advancing innovation, and preparing practice ready baccalaureate nursing graduates. To be practice ready, nursing graduates must be agile and think and reason on their feet due to increasing care complexity beyond the hospital walls, changing care needs of individuals and families, advancing technology, shifting settings of care delivery, and managing multiple transitions. The purpose of this paper is to consider these healthcare changes and share a new baccalaureate nursing curriculum that radically shifts the paradigm from caring for patients to caring for people, and transforms from a diseased-based, acute care focused curriculum to one promoting a culture of health and multiple new and emerging roles of registered nurses

Experiments on Internet Response

This paper suggests a generalized distribution of response times to new information $\sim t^{-b}$ for human populations in the absence of deadlines. This has important implications for psychological and social studies as well the study of dynamical networks such as the WWW.Comment: 4 figures 6 page

Integrating Correctional and Community Health Care: An Innovative Approach for Clinical Learning in a Baccalaureate Nursing Program.

PROBLEM: With an evolving focus on primary, community-based, and patient-centered care rather than acute, hospital-centric, disease-focused care, and recognition of the importance of coordinating care and managing transitions across providers and settings of care, registered nurses need to be prepared from a different and broader knowledge base and skills set. A culture change among nurse educators and administrators and in nursing education is needed to prepare competent registered nurses capable of practicing from a health promotion, disease prevention, community- and population-focused construct in caring for a population of patients who are presenting health problems and conditions that persist across decades and/or lifetimes. While healthcare delivery is moving from the hospital to ambulatory and community settings, community-based educational opportunities for nursing students are shrinking due to a variety of reasons, including but not limited to increased regulatory requirements, the presence of competing numbers of nursing schools and their increased enrollment of students, and decreasing availability of community resources capable and willing to precept students in an all-day interactive learning environment. METHODS: A detailed discussion of one college of nursings\u27 journey to find an innovative solution and approach to the dilemma of limited and decreasing available community clinical sites to prepare senior level prelicensure baccalaureate nursing students for healthcare practice in the twenty-first century. FINDINGS: This article demonstrated how medium/maximum prisons can provide an ideal learning experience for not only technical nursing skills but more importantly for reinforcing key learning goals for community-based care, raising population-based awareness, and promoting cultural awareness and sensitivity. In addition, this college of nursing overcame the challenges of initiating and maintaining clinical placement in a prison facility, collaboratively developed strategies to insure student and faculty safety satisfying legal and administrative concerns for both the college of nursing and the prison, and developed educational postclinical assignments that solidified clinical course and nursing program objectives. Lastly, this college of nursing quickly learned that not only did nursing students agree to clinical placement in an all-male medium- to maximum-security prison despite its accompanying restrictive regulations especially as it relates to their access to personal technology devices, but there was an unknown desire for a unique clinical experience. CONCLUSION: The initial pilot program of placing eight senior level prelicensure baccalaureate nursing students in a 4,000-person all male medium- to maximum-security prison for their community clinical rotation has expanded to include three state-run maximum all male prisons in two states, a 3,000-person male/female federal prison, and several juvenile detention centers. Clinical placement of students in these sites is by request only, resulting in lengthy student waiting lists. This innovative approach to clinical learning has piqued the interest of graduate nurse practitioner (NP) students as well. One MSN, NP student has been placed in the federal prison every semester for over a year. Due to increasing interest from graduate students to learn correctional health nursing, the college of nursing is now expanding NP placement to the other contracted maximum-security prisons. This entire experience has changed clinical policies within a well-established academic culture and promoted creative thinking regarding how and where to clinically educate and prepare registered baccalaureate nurses for the new culture of health and wellness