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Specific Procedures (specific + procedure)
Selected AbstractsSpecific aspects on crack advance during J -test method for structural materials at cryogenic temperaturesFATIGUE & FRACTURE OF ENGINEERING MATERIALS AND STRUCTURES, Issue 2 2006K. WEISS ABSTRACT Cryogenic elastic plastic, J -integral investigations on metallic materials often show negative crack extension values with respect to resistance curve J - R. According to the present ASTM standard, the use of unloading compliance technique relies on the estimation procedure of the crack lengths during the unloading sequences of the test. The current standard, however, does not give any specific procedure for treating such negative data. To date, the applied procedure uses the shifting of the negative crack extension values either to the onset of the blunting line or to the offset of the resistance curve. The present paper represents a solution of the negative crack length problem on the basis of a mechanical evaluation procedure of the unloading slopes. The achieved progress using this evaluation technique is demonstrated on different materials such as cryogenic high toughness stainless steels, low carbon ferritic steel and aluminum alloys from the series of 7000 and 5000. In addition, this work deals with the crack tunnelling phenomenon, observed for high toughness materials, and shows the reduction of this crack extension appearance by using electro discharge machining (EDM) side groove technique. The differences between EDM processed side grooves and standard V-notch machining have been investigated within these test series. [source] Analytical approach to the optimal adaptation rate of reconfigurable radio networksINTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS, Issue 7 2008R. Fraile Abstract Flexible radio resource management schemes are nowadays used within a wide range of systems. However, the optimal selection for their adaptation rate is still an open research issue. This paper presents an analytical approach to such problem, which consists in a combined analysis of the dynamics of the session-arrival process and the estimation of the mean traffic load from network measurements. From this study, it is concluded that both aspects pose an upper limit on the optimal system adaptation rate, being the most restrictive the one depending on the mean traffic load estimation. A specific procedure for deriving such limit on adaptation rate is provided. It is shown that the derived value directly depends on the mean service duration. The application of the whole analysis is illustrated with an example based on a set of measurements from a live network. Copyright © 2008 John Wiley & Sons, Ltd. [source] Application of Histomorphometric Methods to the Study of Bone Repair,JOURNAL OF BONE AND MINERAL RESEARCH, Issue 10 2005Louis C Gerstenfeld Abstract ABSTRACT: Standardized methods for the histomorphometric assessment of bone are essential features of most studies of metabolic bone diseases and their treatments. These methodologies were developed to assess coupled remodeling, focusing primarily on osteoblasts and osteoclasts, the anabolic and catabolic rates of these cells, and structural features of mature bone. Research studies on bone healing and the development of new therapeutic approaches for the enhancement of bone repair also require a comprehensive understanding of the basic cellular and tissue level mechanisms that underlie these processes. However, the histological methods developed for metabolic bone disease studies are not completely suitable for studies of bone repair because they are based on assumptions that there is little variation in tissue composition within a sample of bone and not generally designed to quantify other types of tissues, such as cartilage, that contribute to bone healing. These techniques also do not provide tissue-based structural measurements that are relatable to the specific types of biomechanical and radiographic structural assessments that are used to determine rates of bone healing. These deficiencies in current histological approaches therefore point to the need to establish standardized criteria for the histomorphometric assessments that are specifically adapted for the study of bone repair in models of fracture healing and bone regeneration. In this Perspective, we outline what we believe to be the specific structural, tissue. and cellular aspects that need to be addressed to establish these standardized criteria for the histomorphometric assessment of bone repair. We present the specific technical considerations that need to be addressed to appropriately sample repair tissues to obtain statistically meaningful results and suggest specific procedures and definitions of nomenclatures for the application of this technology to bone repair. Finally, we present how aspects of histomorphometric measurements of bone repair can be related to biomechanical and radiographic imaging properties that functionally define rates of bone healing, and thus, how these tools can be used to provide corroborating data. [source] Experimental analysis of specific treatment factors: Efficacy and practice implicationsJOURNAL OF CLINICAL PSYCHOLOGY, Issue 7 2005Jeffrey M. Lohr Interest in the empirical demonstration of the clinical efficacy of psychosocial treatments has been rekindled by societal concerns over accountability and cost effectiveness of mental health services. The result has been the identification of specific treatments for specific disorders. The prescription of treatment content should be based on the theory of therapeutic action and/or the disorder to which it is applied. The demonstration of specific treatment efficacy requires experimental evidence showing the influence of specific procedures beyond nonspecific factors of treatment. We provide an analysis of these factors and their effects in evaluating the specific efficacy of prescriptive psychosocial treatments. Experimental procedures and designs that test the validity of specific treatments are described and applied to cognitive-behavioral treatments of generalized anxiety disorder. The empirical and professional implications of specific treatment efficacy in evidence-based practice are discussed. © 2005 Wiley Periodicals, Inc. J Clin Psychol 61: 819,834, 2005. [source] Clinical outcomes with unfractionated heparin or low-molecular-weight heparin as bridging therapy in patients on long-term oral anticoagulants: the REGIMEN registry,JOURNAL OF THROMBOSIS AND HAEMOSTASIS, Issue 6 2006A. C. SPYROPOULOS Summary.,Background: Patients who receive long-term oral anticoagulant (OAC) therapy often require interruption of OAC for an elective surgical or an invasive procedure. Heparin bridging therapy has been used in these situations, although the optimal method has not been established. No large prospective studies have compared unfractionated heparin (UFH) with low-molecular-weight heparin (LMWH) for the perioperative management of patients at risk of thromboembolism requiring temporary interruption of long-term OAC therapy. Patients/methods: This multicenter, observational, prospective registry conducted in North America enrolled 901 eligible patients on long-term OAC who required heparin bridging therapy for an elective surgical or invasive procedure. Practice patterns and clinical outcomes were compared between patients who received either UFH alone (n = 180) or LMWH alone (n = 721). Results: Overall, the majority of patients (74.5%) requiring heparin bridging therapy had arterial indications for OAC. LMWH, in mostly twice-daily treatment doses, represented approximately 80% of the study population. LMWH-bridged patients had significantly fewer arterial indications for OAC, a lower mean Charlson comorbidity score, and were less likely to undergo major or cardiothoracic surgery, receive intraprocedural anticoagulants or thrombolytics, or receive general anesthesia than UFH-bridged patients (all P < 0.05). The LMWH group had significantly more bridging therapy completed in an outpatient setting or with a < 24-h hospital stay vs. the UFH group (63.6% vs. 6.1%, P < 0.001). In the LMWH and UFH groups, similar rates of overall adverse events (16.2% vs. 17.1%, respectively, P = 0.81), major composite adverse events (arterial/venous thromboembolism, major bleed, and death; 4.2% vs. 7.9%, respectively, P = 0.07) and major bleeds (3.3% vs. 5.5%, respectively, P = 0.25) were observed. The thromboembolic event rates were 2.4% for UFH and 0.9% for LMWH. Logistic regression analysis revealed that for postoperative heparin use a Charlson comorbidity score > 1 was an independent predictor of a major bleed and that vascular, general, and major surgery were associated with non-significant trends towards an increased risk of major bleed. Conclusions: Treatment-dose LMWH, mostly in the outpatient setting, is used substantially more often than UFH as bridging therapy in patients with predominately arterial indications for OAC. Overall adverse events, including thromboembolism and bleeding, are similar for patients treated with LMWH or UFH. Postoperative heparin bridging should be used with caution in patients with multiple comorbidities and those undergoing vascular, general, and major surgery. These findings need to be confirmed using large randomized trials for specific patient groups undergoing specific procedures. [source] Classification for coding procedures in the intensive care unitACTA ANAESTHESIOLOGICA SCANDINAVICA, Issue 8 2002H. Flaatten Background: There is no commonly accepted coding system for non-operative procedures in general, including intensive care unit (ICU) procedures. In order to create a classification of codes for ICU procedures, a system developed at the University Hospital of Bergen was evaluated in four Nordic countries. Methods: Classification codes were constructed using seven main groups of related procedures that were given a letter from A to G. Within each group major procedures were given a number from 00 to 99, with the possibility of up to 10 subclassifications within each procedure. A simple questionnaire regarding the use of coding general ICU procedures and some specific procedures was sent to 171 ICUs in Sweden, Finland, Denmark, and Norway. They were also asked to give their comments on the new classification coding system, which was attached. Results: One hundred and fifty-four questionnaires were returned (response rate 90%). Some or most of the ICU procedures were registered in the ICUs (82.2%). However 38% did not use any coding system and 24% used a specific internal system. The new classification coding system was well received, and was given a mean value of 7.5 using a VAS scale from 0 to 10 (best). Most ICUs would consider using this system if introduced at a national level. Conclusion: Most Nordic ICUs do register some or most of the procedures performed. Such procedures are however, registered in very different ways, using several different systems, and are often home-made. The new classification system of ICU procedures was well rated. [source] Prioritizing patients for elective surgery: a systematic reviewANZ JOURNAL OF SURGERY, Issue 8 2003Andrew D. MacCormick Background: Priority scoring tools are mooted as means for dealing with burgeoning elective surgical waiting lists. There is ongoing development work in New Zealand, Canada and the UK. This emerging international perspective is invaluable in determining the application of these tools and addressing any pitfalls. Methods: A systematic electronic literature review was performed. Information was also retrieved using a search of reference lists of all papers included in the review and contact with those who were involved in the development of such criteria. Results: The ethical basis of prioritization differed among priority scoring tools and in a number was not stated. The majority of tools covered criteria for specific procedures. Delphi consensus methods and regression were the predominant methods for determining specific criteria. Authors' opinions were the main source of generic criteria. Linear and non-linear models or matrices summated criteria. Conclusion: There is debate over the ethical basis for prioritization. It is a concern that it is not addressed in many studies. The development of generic criteria showed a dearth of consensus approaches that represents a significant gap in our knowledge. On the aspects of summation and weighting, the impact of assumptions on the prioritization of patients may not have been fully explored. [source] Identification of behavioral function in public schools and a clarification of termsBEHAVIORAL INTERVENTIONS, Issue 1 2007Kelly Kates-McElrath The discipline-related component of Individuals with Disabilities Education Act (IDEA) requires that schools conduct a Functional Behavioral Assessment (FBA) when a student's behavior disrupts the educational environment and/or results in suspension from school. Applied behavior analysts often make a distinction between the terms functional assessment/functional behavioral assessment, and functional analysis yet there exists no consensus on how that distinction should be made. A relevant review of the literature was conducted to identify research articles using functional analysis or functional assessment methodology in public school settings in an effort to identify the specific procedures employed by each. Results of the review support the existence of a discrepancy between proposed and actual school-based assessment models, as well as other claims regarding functional assessment research. We address the problem of distinguishing between the terms assessment and analysis as they relate to procedures employed to determine behavioral function of students exhibiting aberrant behavior. A clarification of terms is proposed. Copyright © 2007 John Wiley & Sons, Ltd. [source] U.S. Trends in Obstetric Procedures, 1990,2000BIRTH, Issue 3 2002Lola Jean Kozak PhD ABSTRACT: Background: During the 1980s the rate of obstetric procedures performed during delivery rose precipitously. This study follows the use of obstetric procedures through the 1990s to explore whether the patterns witnessed in the previous decade continued through the next. Methods: Data on total obstetric procedures and eight specific procedures (cesarean section, medical and surgical induction of labor, other artificial rupture of membranes, episiotomy, repair of current obstetric laceration, vacuum extraction, forceps delivery) were obtained from the National Hospital Discharge Survey, a nationally representative survey of discharges from short-stay non-Federal hospitals. Approximately 32,000 records for women with deliveries were included in the survey each year. Results: The total rate of all obstetric procedures did not change significantly from 1990 through 2000. However, as during the 1980s, rates increased for induction of labor, vacuum extraction, and repair of current obstetric laceration. Rates decreased for forceps delivery and episiotomy, also continuing 1980s trends. After a long period of increase, the rate of cesarean section declined from 1988 to 1995 but increased again from 1995 to 2000. Conclusions: Unlike the 1980s, the overall rate of obstetric procedures did not increase from 1990 to 2000, but the mix of obstetric procedures performed continued to change during this period. (BIRTH 29:3 September2002) [source] Working together: neonatal nurse practitioners in practiceACTA PAEDIATRICA, Issue 2 2002ME Redshaw The aim of this study was to examine the relatively new role of neonatal nurse practitioners (NNPs) in the United Kingdom, comparing practice in different types of neonatal units and work undertaken by junior medical staff (JMS). Diary checklists sent to the total population of qualified NNPs in neonatal units (NNUs) and JMS in six regional centres with qualified NNPs were returned from 68 out of 109 qualified NNPs (62%), working in 50 different NNUs and from 25 out of 48 JMS (52%). Direct observations (totalling 263.5 h) were made by an experienced neonatal nurse researcher on 30 different NNPs. Frequencies of activities and specific procedures were compared between groups. Observational measures included type and duration of activity and interactions with other members of staff. NNPs were found to be undertaking a range of activities: in the NNU, which usually involved blood sampling, siting of intravenous cannulae, presenting at ward rounds and teaching. Outside the unit, NNPs attended the delivery suite and the postnatal ward. Significant differences were found in the nature and organization of their work in different types of NNUs. A comparison between NNPs and JMS showed similar activities, with greater direct involvement by NNPs in the NNU and in teaching. The diary data were supported by observations and together these are evidence of current NNP practice. Conclusion: To a large extent there is an overlap in the work of JMS and NNPs in neonatal units, but although the clinical work and areas of activity are similar, there are differences in emphasis and in work organization. [source] | |||||||||||||