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At least 1,153 records · Page 64Linked to original sources
PubMed2003

Occupational corneal argyrosis in art silver solderers.

PURPOSE: To determine the value of confocal and specular microscopy in the examination of corneal argyrosis in art silver solderers. METHODS: Six patients with corneal argyrosis underwent a complete physical and ophthalmologic examination. Specular microscopy was performed in three cases, and in vivo confocal microscopy in four cases. Ultrasound biomicroscopy and corneal topography were performed in three cases. A conjunctival specimen of one patient was examined histologically in paraffin sections. RESULTS: Slit-lamp examination showed gray, diffuse opacities in the deep corneal stroma. Confocal microscopy showed highly reflective deposits with a granular pattern anterior to the corneal endothelium and hypereflective keratocyte nuclei with visible cytoplasm in the anterior stroma. Specular microscopy demonstrated round white bodies anterior to the corneal endothelium. Silver deposits were not found histologically. CONCLUSIONS: Silver solderers with long-term exposure to silver compounds are at high risk of developing corneal argyrosis. We conclude that specular microscopy and in vivo confocal microscopy provided important information for the diagnosis of corneal argyrosis.

Aged↗
PubMed1999

The first year as a neophyte RSO at a liberal arts college.

Union College is a small liberal arts college in the northeast with a good reputation in science. It is also one of the oldest schools in the nation, having been founded in 1795. Langmuir and Steinmetz taught here as did Chandler, the founder of the American Chemical Society and Ellery, one of the longest tenured Secretaries of Sigma Xi. Arthur and Carter became U.S. Presidents. We claim a Nobel Prize winner, the inventor of transistors, the person who developed the methods for producing quartz crystals and fiber optics. The presidents of du Pont and Kodak attended Union College. We are referred to as the "Mother of Fraternities," and we had the first radio station on a college campus (although not through the airways). Still, until recently, our reputation has been less than admirable among radiation safety experts. This article highlights some of the experiences of a new RSO at this well-acknowledged institution.

Health Physics↗
PubMed1996

Metacognition: state-of-the-art learning theory implications for clinical nursing education.

Clinical nursing education represents one of the most challenging aspects of the faculty role because nursing educators are being required to teach crucial aspects of comprehensive clinical practice to students in limited time periods and in increasingly demanding, high-acuity affiliation sites. State-of-the-art research in metacognition provides a stimulating array of instructional strategies that can assist in this process and provide an impetus for further cognitive inquiry in nursing. The article analyzes metacognition, explores its historical roots, delineates its relationship to memory theory, and describes a range of metacognitive strategies that are useful to faculty and students in nursing.

Clinical Competence↗
PubMed2001

Patient education: designing a state-of-the-art consumer health information library.

Many patients believe that the education they receive about their health and their illnesses is inadequate or lacking. Nurse executives are in a key position to influence their patients' abilities to become more informed and to take greater responsibility for their healthcare decisions. In the article, the authors discuss Massachusetts General Hospital's state-of-the-art consumer health information library, including how the project was planned, organized, and implemented.

Boston↗
PubMed1995

Mastering the art of delegation.

Delegation, an important, readily acquired management skill, promotes efficiency, increases productivity and improves time management. A four-step process guides the nurse manager through the art and science of delegation.

Decision Making, Organizational↗
PubMed1990

Direct evidence of a functional separation of alloreactive T lymphocytes from bystander cells infiltrating rat allografts. Interleukin 2 receptor-positive cells reacting with the monoclonal antibody ART 18 mediating second-set rejection.

In this study we examined the functional capacity of unseparated, IL-2R positive and IL-2R negative leukocytes infiltrating BN rat hearts or kidneys grafted into allogeneic LEW rats. Upon adoptive transfer into syngeneic LEW recipients, splenocytes or day-3 graft infiltrate cells of either cardiac or renal transplants were ineffective to alter BN cardiac test graft survival (controls 7.8 +/- 0.8 day). However, adoptive transfer of day-5 heart infiltrate cells resulted in a delay of test graft rejection (9.4 +/- 0.7 day, P less than 0.001), while day-5 kidney-graft-infiltrating cells produced second set rejection (6.2 +/- 0.5, P less than 0.001). Specificity controls of day-5 cells infiltrating DA heart or kidney grafts rejected at 7.8 +/- 0.8 or 7.7 +/- 0.5 days. Following separation into IL-2R positive and negative subpopulations by use of the mAB ART 18, IL-2R positive but not IL-2R negative cells caused second set rejection in both the renal and the cardiac model (6.2 +/- 0.4, respectively, 6.3 +/- 0.5 days, P less than 0.001 or P less than 0.005). Furthermore, in the kidney model IL-2R positive nylon-wool nonadherent cells also caused second set rejection (6.2 +/- 0.4, P less than 0.005) suggesting that IL-2R positive T cells present in the graft at maximal infiltration are the mediators of rejection. Thus, it appears that these cells can be phenotypically and functionally separated from bystander cells.

Animals↗
PubMed1999

The friendly art of persuasion.

The ability to persuade is a critical skill for the health care professional in relating to employees, colleagues, and groups of individuals if health care objectives are to be promoted. However, persuasion is an art, which requires careful preplanning and deliberative actions if it is to be carried out successfully. Persuasion done in a friendly manner is more likely to be effective. This article provides techniques that will enable the health care professional to use persuasive methods most advantageously.

Group Processes↗
PubMedDate not supplied

The lost art of the covenant: trust as a commodity in health care.

Physicians argue that the advent of managed care has turned medicine into a business and that they spend more time learning the art of doing business than practicing medicine, while losing their professional spirit, patient loyalty, autonomy, and income. Medicine was a business before it was a science. Holding on to Hippocratic ideals in a world of on-demand consumers has made the covenantal physician-patient relationship ineffective and devoid of mutual trust. Physicians have argued that trust is time-dependent and a casualty of time-bound managed care guidelines. The author suggests that the principle of trust is not outdated, not exclusively time-dependent, and is still relevant to a modern Hippocrates loyalist. A relationship of trust is built on the style and quality of verbal and nonverbal communication. Trust is not an acquired trait; it is an expectation resulting from an interactive process of human concern and caring.

Delivery of Health Care↗
PubMed2004

Nasal reconstruction: the state of the art.

PURPOSE OF REVIEW: Cutaneous malignancies of the nose are common problems and create the need for nasal reconstruction within many otolaryngology practices. In spite of the fact that such reconstruction is an ancient art, there continue to be innovations and advances that allow for more predictable and functional long-term results. RECENT FINDINGS: Analyzing the nasal defect through an organized algorithm can be useful in many circumstances, especially when one needs to consider vectors of tension, minimizing alar base asymmetry, resultant scars, and preservation of the intranasal airway. Application of the principle of aesthetic subunits has greatly improved the cosmetic results for many large nasal defects, and there have been some proposals to modify the original definitions and concept. Structural reconstruction is paramount with complex defects that involve the nasal framework or with those that are located in functionally critical areas. Autogenous cartilage grafting remains the gold standard, but the use of alloplastic and homograft materials for grafting continues to be reported as an alternative. Internal lining repair is essential with larger defects and the versatility of intranasal flaps is understood, but at times not available. Other flaps have been described and may be useful on such occasions. SUMMARY: There are many considerations during nasal reconstruction, and the surgeon must be facile with a variety of options within his/her armamentarium.

Algorithms↗
PubMed2005

Multifractal structure in nonrepresentational art.

Multifractal analysis techniques are applied to patterns in several abstract expressionist artworks, painted by various artists. The analysis is carried out on two distinct types of structures: the physical patterns formed by a specific color ("blobs") and patterns formed by the luminance gradient between adjacent colors ("edges"). It is found that the multifractal analysis method applied to "blobs" cannot distinguish between artists of the same movement, yielding a multifractal spectrum of dimensions between about 1.5 and 1.8. The method can distinguish between different types of images, however, as demonstrated by studying a radically different type of art. The data suggest that the "edge" method can distinguish between artists in the same movement and is proposed to represent a toy model of visual discrimination. A "fractal reconstruction" analysis technique is also applied to the images in order to determine whether or not a specific signature can be extracted which might serve as a type of fingerprint for the movement.

Journal Article↗
PubMed2002

X-ray absorption spectroscopy: state-of-the-art analysis.

State-of-the-art techniques for analysing X-ray absorption spectra are reviewed, with an eye to biological applications. Recent attempts to perform full spectral fitting of the XANES energy region and beyond for the purpose of structural analysis have met with encouraging success. The present paper analyses the theoretical motivations behind this success and indicates routes for future improvements. The theoretical background is not entirely new, although the point of view is, and some sections and appendices present material that the Authors believe has never been published before. The aim of this paper is to provide a theoretical analysis that is as self-contained as possible.

Absorptiometry, Photon↗
PubMed2005

Development of a new state-of-the-art beamline optimized for monochromatic single-crystal and powder X-ray diffraction under extreme conditions at the ESRF.

A new state-of-the art synchrotron beamline fully optimized for monochromatic X-ray diffraction at high pressure and high (or low) temperature is presented. In comparison with the old high-pressure beamline ID30, this new beamline exhibits outstanding performance in terms of photon flux and focusing capabilities. The main components of this new instrument will be described in detail and compared with the performance of beamline ID30. In particular, the choices in terms of X-ray source, X-ray optics, sample environment and detectors are discussed. The first results of the beamline commissioning are presented.

Journal Article↗
PubMed2002

Shape recovery algorithms using level sets in 2-D/3-D medical imagery: a state-of-the-art review.

The class of geometric deformable models, also known as level sets, has brought tremendous impact to medical imagery due to its capability of topology preservation and fast shape recovery. In an effort to facilitate a clear and full understanding of these powerful state-of-the-art applied mathematical tools, this paper is an attempt to explore these geometric methods, their implementations and integration of regularizers to improve the robustness of these topologically independent propagating curves/surfaces. This paper first presents the origination of level sets, followed by the taxonomy of level sets. We then derive the fundamental equation of curve/surface evolution and zero-level curves/surfaces. The paper then focuses on the first core class of level sets, known as "level sets without regularizers." This class presents five prototypes: gradient, edge, area-minimization, curvature-dependent and application driven. The next section is devoted to second core class of level sets, known as "level sets with regularizers." In this class, we present four kinds: clustering-based, Bayesian bidirectional classifier-based, shape-based and coupled constrained-based. An entire section is dedicated to optimization and quantification techniques for shape recovery when used in the level set framework. Finally, the paper concludes with 22 general merits and four demerits on level sets and the future of level sets in medical image segmentation. We present applications of level sets to complex shapes like the human cortex acquired via MRI for neurological image analysis.

Algorithms↗
PubMed2006

The state of the art of nanobioscience in Japan.

This paper reviews a part of the state of the art of nanobioscience in Japan. The importance of combination and integration of interdisciplinary principles is emphasized for the development of nanobioscience. Biomagnetics, biomechanics, nanomachining, self-replicating cell model, neuronal network, drug delivery system, and tissue engineering are discussed.

Biological Science Disciplines↗
PubMed2006

Prune-able fuzzy ART neural architecture for robot map learning and navigation in dynamic environments.

Mobile robots must be able to build their own maps to navigate in unknown worlds. Expanding a previously proposed method based on the fuzzy ART neural architecture (FARTNA), this paper introduces a new online method for learning maps of unknown dynamic worlds. For this purpose the new Prune-able fuzzy adaptive resonance theory neural architecture (PAFARTNA) is introduced. It extends the FARTNA self-organizing neural network with novel mechanisms that provide important dynamic adaptation capabilities. Relevant PAFARTNA properties are formulated and demonstrated. A method is proposed for the perception of object removals, and then integrated with PAFARTNA. The proposed methods are integrated into a navigation architecture. With the new navigation architecture the mobile robot is able to navigate in changing worlds, and a degree of optimality is maintained, associated to a shortest path planning approach implemented in real-time over the underlying global world model. Experimental results obtained with a Nomad 200 robot are presented demonstrating the feasibility and effectiveness of the proposed methods.

Algorithms↗
PubMed2006

A low-power current mode fuzzy-ART cell.

This paper presents a very large scale integration (VLSI) implementation of a low-power current-mode fuzzy-adaptive resonance theory (ART) cell. The cell is based on a compact new current source multibit memory cell with online learning capability. A small prototype of the designed cell and its peripheral block has been fabricated in the AustriaMicroSystems (AMS)-0.35-microm technology. The cell occupies a total area of 44 x 34 microm2 and consumes a maximum current of 22 nA.

Algorithms↗
PubMed2005

Large-scale evaluation of multimodal biometric authentication using state-of-the-art systems.

We examine the performance of multimodal biometric authentication systems using state-of-the-art Commercial Off-the-Shelf (COTS) fingerprint and face biometric systems on a population approaching 1,000 individuals. The majority of prior studies of multimodal biometrics have been limited to relatively low accuracy non-COTS systems and populations of a few hundred users. Our work is the first to demonstrate that multimodal fingerprint and face biometric systems can achieve significant accuracy gains over either biometric alone, even when using highly accurate COTS systems on a relatively large-scale population. In addition to examining well-known multimodal methods, we introduce new methods of normalization and fusion that further improve the accuracy.

Algorithms↗
PubMedDate not supplied

Full body virtual autopsies using a state-of-the-art volume rendering pipeline.

This paper presents a procedure for virtual autopsies based on interactive 3D visualizations of large scale, high resolution data from CT-scans of human cadavers. The procedure is described using examples from forensic medicine and the added value and future potential of virtual autopsies is shown from a medical and forensic perspective. Based on the technical demands of the procedure state-of-the-art volume rendering techniques are applied and refined to enable real-time, full body virtual autopsies involving gigabyte sized data on standard GPUs. The techniques applied include transfer function based data reduction using level-of-detail selection and multi-resolution rendering techniques. The paper also describes a data management component for large, out-of-core data sets and an extension to the GPU-based raycaster for efficient dual TF rendering. Detailed benchmarks of the pipeline are presented using data sets from forensic cases.

Algorithms↗