The MAEROS aerosol model is being incorporated into the MELCOR code system for the calculation of... more The MAEROS aerosol model is being incorporated into the MELCOR code system for the calculation of risk from severe reactor accidents. To gain insight to assist in this incorporation, a computational test problem involving a five-component aerosol in the containment of a pressurized water reactor was analyzed with MAEROS. The following topics were investigated: (1) the CRAY-1 CPU time requirements to implement and solve the system of differential equations on which MAEROS is based, (2) the effects on computational time and representational accuracy due to the use of different overall section boundaries and numbers of sections and components, and (3) the behavior of the aerosol and the variables which influence this behavior. Uncertainty and sensitivity analysis techniques based on Latin hypercube sampling and regression analysis were used in the investigation. Ten sections and overall section boundaries from 0.1E-6 m to 50.E-6 m were found to be adequate for the problem under consideration. Further, solution time was generally found to be a thousand times or more faster than real time, which is felt to be adequate for MELCOR. Stepwise regression, standardized regression coefficients and partial correlation coefficients were used to investigate the sources of variation in computational time and suspended aerosolmore » concentration. 18 refs., 27 figs., 11 tabs.« less
Proceedings of the 28th conference on Winter simulation - WSC '96, 1996
The overwhelming cOTI1plexity of influencing factors determining the performance of parallel simu... more The overwhelming cOTI1plexity of influencing factors determining the performance of parallel simulation executions demands a performance oriented development of logical process simulators. This paper presents an incremental code developTI1ent process that supports early performance predictions of Time Warp protocols and several of its optimizations. A set of tools, N-MAP, for performance prediction and visualization has been developed, representing a testbed for a detailed sensitivity analysis of the various Time Warp execution parameters. As an exan1ple, the effects of various performance factors like the event structure underlying the siTI1ulation task, the average LVT progression per simulation step, the con1mitment rate, state saving overhead, etc. are den10nstrated. We show how the scenario management features provided by the N-NIAP tool can be efficiently utilized to predict performance sensitivities. For the particular example, the Time Warp protocol, though highly involved, N-IvIAP was able to predict the performance sensitivity that was measured from the full implementation executing on the Meiko CS-2.
International Research Handbook on Values Education and Student Wellbeing, 2010
This chapter outlines the practicalities and potentialities of Imaginative Education (IE) for the... more This chapter outlines the practicalities and potentialities of Imaginative Education (IE) for the development of ethical character. The planning frameworks and theoretical grounds of Imaginative Education, as developed by Kieran Egan, offer a workable and effective pedagogical method for the implementation of Values Education. After a brief review of some major principles of IE – the connection between the imagination
Proceedings of the 1985 ACM annual conference on The range of computing : mid-80's perspective mid-80's perspective - ACM '85, 1985
ABSTRACT It has been almost thirty years since the Dartmouth Conference on artificial intelligenc... more ABSTRACT It has been almost thirty years since the Dartmouth Conference on artificial intelligence. Since then, AI has emerged from a laboratory curiosity to a blossoming technology with world wide strategic implications. As this technology proliferates, the PC ...
Managed Ventricular Pacing (MVP) and Search AV+ (SAV+) are two pacing algorithms designed to redu... more Managed Ventricular Pacing (MVP) and Search AV+ (SAV+) are two pacing algorithms designed to reduce ventricular pacing. MVP promotes conduction by operating in AAI/R mode with backup ventricular pacing during atrioventricular block (AVB). SAV+ operates in DDD/R mode with a nominal AV extension of 290 ms during atrial sensing and 320 ms during atrial pacing. The reduction in ventricular pacing was compared with these two algorithms in pacemaker patients. The EnRhythm and EnPulse clinical studies assessed the percentage of ventricular pacing (%VP) after 1 month. Each patient's AVB status was assigned using the following hierarchical categories: persistent third-degree AVB (p3AVB), episodic third-degree AVB (e3AVB), second-degree AVB (2AVB), first-degree AVB (1AVB), and no AVB (nAVB). The%VP was tabulated for each AVB status category. Data were available from 322 patients of whom 129 received DDD(R) pacing with the MVP algorithm activated and 193 patients with DDD(R) pacing and the SAV+ function activated, each for a month period. MVP resulted in a significantly lower median%VP than SAV+ in all AVB categories except for p3AVB: nAVB (0.3 vs 2.9, P < 0.0001), 1AVB (0.9% vs 80.6%, P…
Research in Social and Administrative Pharmacy, 2012
The role of pharmacists has transformed significantly because of changes in pharmacists' training... more The role of pharmacists has transformed significantly because of changes in pharmacists' training and population health demands. Within this context, community pharmacists are recognized as important health personnel for the provision of extended health services. Similarly, in Malaysia, the need to transform community pharmacy practice has been discussed by all interested parties; however, the transition has been slow due in part to the nonexistence of a dispensing separation policy between pharmacists and medical doctors in private community practices. For decades, medical doctors in private community practices have had the right to prescribe and dispense, thus diluting the role of community pharmacists because of overlapping roles. This article explores dispensing separation in Malaysia and, by taking into account the needs of health professionals and health care consumers, suggests a mechanism for how dispensing separation practice can be implemented.
OBJECTIVE To determine pharmacokinetics and sedative effects of buprenorphine after IV and oral t... more OBJECTIVE To determine pharmacokinetics and sedative effects of buprenorphine after IV and oral transmucosal (OTM) administration in guinea pigs. ANIMALS 14 male guinea pigs (6 adults for preliminary experiment; eight 8-to 11-week-old animals for primary study). PROCEDURES A preliminary experiment was conducted to determine an appropriate buprenorphine dose. In the primary study, buprenorphine (0.2 mg/kg) was administered IV or OTM, and blood samples were obtained. The pH of the oral cavity was measured before OTM administration. Sedation was scored for 6 hours on a scale of 0 to 3 (0 = no sedation and 3 = heavy sedation). After a 7-day washout period, procedures were repeated in a crossover manner. Plasma buprenorphine concentration was quantified, and data were analyzed with a noncompartmental pharmacokinetic approach. RESULTS Mean peak plasma buprenorphine concentrations were 46.7 and 2.4 ng/ mL after IV and OTM administration, respectively. Mean time to maximum plasma buprenorphine concentration was 1.5 and 71.2 minutes, and mean terminal half-life was 184.9 and 173.0 minutes for IV and OTM administration, respectively. There was a range of sedation effects (0 to 2) for both routes of administration, which resolved within the 6-hour time frame. CONCLUSIONS AND CLINICAL RELEVANCE On the basis of pharmacokinetic parameters for this study, buprenorphine at 0.2 mg/kg may be administered IV every 7 hours or OTM every 4 hours to maintain a target plasma concentration of 1 ng/mL. Further studies are needed to evaluate administration of multiple doses and sedative effects in guinea pigs with signs of pain.
The success of microarrays for analyzing nucleic acid and, more recently, protein-protein interac... more The success of microarrays for analyzing nucleic acid and, more recently, protein-protein interactions illustrates the advantages of bioassay miniaturization. However, the current level of miniaturization of useful bioanalytical tools still creates limits in terms of breadth of application. For example, analyses of picoliter sample volumes containing protein analytes that cannot be amplified or replaced (e.g., cancer biopsy material) require unprecedented levels of miniaturization and novel analytical approaches. Novel platform technologies comprised of instrumentation, methods and software must be developed to achieve the goals of ultraminiaturized biodiagnostics. We will describe one such system and its real-world application to biomarker profiling.
... The amount of caliose was usually estimated by counting ali deposits larger than 3.9 [tm in t... more ... The amount of caliose was usually estimated by counting ali deposits larger than 3.9 [tm in the 1 mm wide field at 200 ... The callose deposits, which appeared at opposing si-eve plates, were connected by fluorescing strands and were, in face view, penetrated by many boles. ...
We examine the scattering of longitudinal W , Z and Higgs bosons in the Standard Model using the ... more We examine the scattering of longitudinal W , Z and Higgs bosons in the Standard Model using the equivalent Goldstone-boson Lagrangian. Our calculations include the full one-loop scattering matrix between the states W + L W − L , Z L Z L and HH with no restrictions on the relative sizes of M H and √ s. In addition to deriving the perturbative eigen-amplitudes, we also obtain quite striking results by unitarizing the amplitudes with the use of the K-matrix and Padé techniques.
W elcome to the first issue of the second volume of Perspectives on Politics—a milestone for thos... more W elcome to the first issue of the second volume of Perspectives on Politics—a milestone for those of us who worried that political scientists might not have enough interest in such a journal to sustain it beyond the first flush of enthusiasm. Whatever our problems, that is not one; we are receiving an increasing number of unsolicited manuscripts, and authors are becoming more attuned to the unusual nature of this journal. All of that makes the job of selection more difficult for the editors (see comments below), but also more rewarding. Inadvertently, every article in this issue of Perspectives follows the same theme: depicting and analyzing a process of change. The issue opens with “Voice and Inequality,” a revised version of the presidential address that Theda Skocpol delivered at the 2003 annual meeting of the American Political Science Association. Skocpol turns her distinctive theoretical lens of historical institutional analysis onto the now-canonical issue of social capital, to excellent effect. She shows how organizations with political salience have moved from having a mass-membership base in units integrated within and across communities and states to having a small professional staff in Washington, D.C., or a state capital, and a large fund-raising list. Elites now serve on boards of foundations rather than participating as members of fraternal associations. Skocpol points out the implications for practical politics of this rather unappealing transformation and suggests that it may attenuate democratic practices and worsen political (and perhaps others forms of ) inequality. Zsuzsa Csergo and James Goldgeier, in “Nationalist Strategies and European Integration,” focus on another sort of transformation, accompanying a different institutional dynamic. They reject the possibility that partial unification of European states through the European Union will eliminate old-fashioned nationalism. Nationalism is here to stay, at least in the foreseeable future. It is, however, splintering into four related but distinct ways of reconciling commitment to one’s group with the fact that state boundaries often do not coincide with nationality boundaries. Csergo and Goldgeier use their typology to explicate political choices in Eastern European politics, and they show how one form of nationalism morphs into another. It is probably not possible or even desirable to eliminate the passions and jealousies of nationalistic fervor; but as this article suggests, they can at least be understood better and at most be managed better—though whether through the European Union remains to be seen. Steven Teles and Matthew Kaliner, in “The Public Policy of Skepticism,” address the question of change from a more explicitly normative angle than the other articles in this issue. They start by analyzing Michael Oakeshott’s distinction between the politics of faith and the politics of skepticism. Oakeshott is (as are Teles and Kaliner) by and large more sympathetic to the latter, which generally encourages a move toward conservatism in politics and policy. But skepticism is not always the right choice, and it is not always conservative— and therein lies the value of Oakeshott’s framework. The authors then apply the Oakeshottian approach to three complex and controversial policy arenas: school choice, public health, and Social Security. In so doing, Teles and Kaliner exemplify Perspectives’ bridge-building mission and contribute a more sophisticated frame of reference to these policy disputes than they usually enjoy. The next article takes us from politics to policies and back again. In “The Consequences of Public Policy for Democratic Citizenship,” Suzanne Mettler and Joe Soss point to a curious lacuna in political scientists’ study of citizenship and policy debate. As a group, we appear to be more inclined to adopt a paradigm from another discipline—economics, psychology, sociology, history, or even literature—for studying politics than to focus on a purely political framework, even though we do not lack the concepts to develop the latter. Mettler and Soss bring together an array of scattered political tools and use them to construct a political argument about how policy choices shape the citizenry, who then face a new set of choices about priorities and alternatives that reshapes the citizenry, who then face . . . This dynamic affects who engages, how, why, what participants get from government, and how the government itself is thereby changed. Mettler and Soss do not themselves investigate the normative implications of their new framework, but it could easily extend into discussions of distributive justice, democratic deliberation, and theories of rights. The final article in the opening section of Perspectives takes the broadest and most ambitious look at change of them all. C. Mantzavinos, Douglass North, and Syed Shariq provide a bird’s-eye view of all learning, from individual to institutional and societal, in “Learning,…
We demonstrate a scalable approach for the generation of high average power femtosecond (fs) puls... more We demonstrate a scalable approach for the generation of high average power femtosecond (fs) pulse trains from Ti:sapphire by optically injection locking a resonant amplification cavity. We generate up to 7 W average power with over 30% optical extraction efficiency in a 68 fs pulse train operating at 95 MHz. This master oscillator power amplifier approach allows independent optimization of the fs laser while enabling efficient amplification to high average powers. The technique also enables coherent synchronization among multiple fs laser sources.
Success of oromandibular reconstructions is increasingly achieved through fundamental microvascul... more Success of oromandibular reconstructions is increasingly achieved through fundamental microvascular techniques that incorporate innovative adjunct modalities. We report a complex case of a large anterior mandibular plexiform ameloblastoma reconstructed with an iliac crest free flap in a young woman with bilateral peronea arteria magna. This article serves to highlight the application of several new technologies in an effort to provide a functional and cosmetically acceptable result.
The Journal of Bone and Joint Surgery-American Volume, 2009
BACKGROUND: Insertion of a radial head implant that results in radial overlengthening has been as... more BACKGROUND: Insertion of a radial head implant that results in radial overlengthening has been associated with altered elbow kinematics, increased radiocapitellar joint forces, capitellar erosions, early-onset arthritis, and loss of elbow flexion. The purpose of this study was to identify clinical and radiographic features that may be used to diagnose overlengthening of the radius intraoperatively and on postoperative radiographs.
The MAEROS aerosol model is being incorporated into the MELCOR code system for the calculation of... more The MAEROS aerosol model is being incorporated into the MELCOR code system for the calculation of risk from severe reactor accidents. To gain insight to assist in this incorporation, a computational test problem involving a five-component aerosol in the containment of a pressurized water reactor was analyzed with MAEROS. The following topics were investigated: (1) the CRAY-1 CPU time requirements to implement and solve the system of differential equations on which MAEROS is based, (2) the effects on computational time and representational accuracy due to the use of different overall section boundaries and numbers of sections and components, and (3) the behavior of the aerosol and the variables which influence this behavior. Uncertainty and sensitivity analysis techniques based on Latin hypercube sampling and regression analysis were used in the investigation. Ten sections and overall section boundaries from 0.1E-6 m to 50.E-6 m were found to be adequate for the problem under consideration. Further, solution time was generally found to be a thousand times or more faster than real time, which is felt to be adequate for MELCOR. Stepwise regression, standardized regression coefficients and partial correlation coefficients were used to investigate the sources of variation in computational time and suspended aerosolmore » concentration. 18 refs., 27 figs., 11 tabs.« less
Proceedings of the 28th conference on Winter simulation - WSC '96, 1996
The overwhelming cOTI1plexity of influencing factors determining the performance of parallel simu... more The overwhelming cOTI1plexity of influencing factors determining the performance of parallel simulation executions demands a performance oriented development of logical process simulators. This paper presents an incremental code developTI1ent process that supports early performance predictions of Time Warp protocols and several of its optimizations. A set of tools, N-MAP, for performance prediction and visualization has been developed, representing a testbed for a detailed sensitivity analysis of the various Time Warp execution parameters. As an exan1ple, the effects of various performance factors like the event structure underlying the siTI1ulation task, the average LVT progression per simulation step, the con1mitment rate, state saving overhead, etc. are den10nstrated. We show how the scenario management features provided by the N-NIAP tool can be efficiently utilized to predict performance sensitivities. For the particular example, the Time Warp protocol, though highly involved, N-IvIAP was able to predict the performance sensitivity that was measured from the full implementation executing on the Meiko CS-2.
International Research Handbook on Values Education and Student Wellbeing, 2010
This chapter outlines the practicalities and potentialities of Imaginative Education (IE) for the... more This chapter outlines the practicalities and potentialities of Imaginative Education (IE) for the development of ethical character. The planning frameworks and theoretical grounds of Imaginative Education, as developed by Kieran Egan, offer a workable and effective pedagogical method for the implementation of Values Education. After a brief review of some major principles of IE – the connection between the imagination
Proceedings of the 1985 ACM annual conference on The range of computing : mid-80's perspective mid-80's perspective - ACM '85, 1985
ABSTRACT It has been almost thirty years since the Dartmouth Conference on artificial intelligenc... more ABSTRACT It has been almost thirty years since the Dartmouth Conference on artificial intelligence. Since then, AI has emerged from a laboratory curiosity to a blossoming technology with world wide strategic implications. As this technology proliferates, the PC ...
Managed Ventricular Pacing (MVP) and Search AV+ (SAV+) are two pacing algorithms designed to redu... more Managed Ventricular Pacing (MVP) and Search AV+ (SAV+) are two pacing algorithms designed to reduce ventricular pacing. MVP promotes conduction by operating in AAI/R mode with backup ventricular pacing during atrioventricular block (AVB). SAV+ operates in DDD/R mode with a nominal AV extension of 290 ms during atrial sensing and 320 ms during atrial pacing. The reduction in ventricular pacing was compared with these two algorithms in pacemaker patients. The EnRhythm and EnPulse clinical studies assessed the percentage of ventricular pacing (%VP) after 1 month. Each patient's AVB status was assigned using the following hierarchical categories: persistent third-degree AVB (p3AVB), episodic third-degree AVB (e3AVB), second-degree AVB (2AVB), first-degree AVB (1AVB), and no AVB (nAVB). The%VP was tabulated for each AVB status category. Data were available from 322 patients of whom 129 received DDD(R) pacing with the MVP algorithm activated and 193 patients with DDD(R) pacing and the SAV+ function activated, each for a month period. MVP resulted in a significantly lower median%VP than SAV+ in all AVB categories except for p3AVB: nAVB (0.3 vs 2.9, P < 0.0001), 1AVB (0.9% vs 80.6%, P…
Research in Social and Administrative Pharmacy, 2012
The role of pharmacists has transformed significantly because of changes in pharmacists' training... more The role of pharmacists has transformed significantly because of changes in pharmacists' training and population health demands. Within this context, community pharmacists are recognized as important health personnel for the provision of extended health services. Similarly, in Malaysia, the need to transform community pharmacy practice has been discussed by all interested parties; however, the transition has been slow due in part to the nonexistence of a dispensing separation policy between pharmacists and medical doctors in private community practices. For decades, medical doctors in private community practices have had the right to prescribe and dispense, thus diluting the role of community pharmacists because of overlapping roles. This article explores dispensing separation in Malaysia and, by taking into account the needs of health professionals and health care consumers, suggests a mechanism for how dispensing separation practice can be implemented.
OBJECTIVE To determine pharmacokinetics and sedative effects of buprenorphine after IV and oral t... more OBJECTIVE To determine pharmacokinetics and sedative effects of buprenorphine after IV and oral transmucosal (OTM) administration in guinea pigs. ANIMALS 14 male guinea pigs (6 adults for preliminary experiment; eight 8-to 11-week-old animals for primary study). PROCEDURES A preliminary experiment was conducted to determine an appropriate buprenorphine dose. In the primary study, buprenorphine (0.2 mg/kg) was administered IV or OTM, and blood samples were obtained. The pH of the oral cavity was measured before OTM administration. Sedation was scored for 6 hours on a scale of 0 to 3 (0 = no sedation and 3 = heavy sedation). After a 7-day washout period, procedures were repeated in a crossover manner. Plasma buprenorphine concentration was quantified, and data were analyzed with a noncompartmental pharmacokinetic approach. RESULTS Mean peak plasma buprenorphine concentrations were 46.7 and 2.4 ng/ mL after IV and OTM administration, respectively. Mean time to maximum plasma buprenorphine concentration was 1.5 and 71.2 minutes, and mean terminal half-life was 184.9 and 173.0 minutes for IV and OTM administration, respectively. There was a range of sedation effects (0 to 2) for both routes of administration, which resolved within the 6-hour time frame. CONCLUSIONS AND CLINICAL RELEVANCE On the basis of pharmacokinetic parameters for this study, buprenorphine at 0.2 mg/kg may be administered IV every 7 hours or OTM every 4 hours to maintain a target plasma concentration of 1 ng/mL. Further studies are needed to evaluate administration of multiple doses and sedative effects in guinea pigs with signs of pain.
The success of microarrays for analyzing nucleic acid and, more recently, protein-protein interac... more The success of microarrays for analyzing nucleic acid and, more recently, protein-protein interactions illustrates the advantages of bioassay miniaturization. However, the current level of miniaturization of useful bioanalytical tools still creates limits in terms of breadth of application. For example, analyses of picoliter sample volumes containing protein analytes that cannot be amplified or replaced (e.g., cancer biopsy material) require unprecedented levels of miniaturization and novel analytical approaches. Novel platform technologies comprised of instrumentation, methods and software must be developed to achieve the goals of ultraminiaturized biodiagnostics. We will describe one such system and its real-world application to biomarker profiling.
... The amount of caliose was usually estimated by counting ali deposits larger than 3.9 [tm in t... more ... The amount of caliose was usually estimated by counting ali deposits larger than 3.9 [tm in the 1 mm wide field at 200 ... The callose deposits, which appeared at opposing si-eve plates, were connected by fluorescing strands and were, in face view, penetrated by many boles. ...
We examine the scattering of longitudinal W , Z and Higgs bosons in the Standard Model using the ... more We examine the scattering of longitudinal W , Z and Higgs bosons in the Standard Model using the equivalent Goldstone-boson Lagrangian. Our calculations include the full one-loop scattering matrix between the states W + L W − L , Z L Z L and HH with no restrictions on the relative sizes of M H and √ s. In addition to deriving the perturbative eigen-amplitudes, we also obtain quite striking results by unitarizing the amplitudes with the use of the K-matrix and Padé techniques.
W elcome to the first issue of the second volume of Perspectives on Politics—a milestone for thos... more W elcome to the first issue of the second volume of Perspectives on Politics—a milestone for those of us who worried that political scientists might not have enough interest in such a journal to sustain it beyond the first flush of enthusiasm. Whatever our problems, that is not one; we are receiving an increasing number of unsolicited manuscripts, and authors are becoming more attuned to the unusual nature of this journal. All of that makes the job of selection more difficult for the editors (see comments below), but also more rewarding. Inadvertently, every article in this issue of Perspectives follows the same theme: depicting and analyzing a process of change. The issue opens with “Voice and Inequality,” a revised version of the presidential address that Theda Skocpol delivered at the 2003 annual meeting of the American Political Science Association. Skocpol turns her distinctive theoretical lens of historical institutional analysis onto the now-canonical issue of social capital, to excellent effect. She shows how organizations with political salience have moved from having a mass-membership base in units integrated within and across communities and states to having a small professional staff in Washington, D.C., or a state capital, and a large fund-raising list. Elites now serve on boards of foundations rather than participating as members of fraternal associations. Skocpol points out the implications for practical politics of this rather unappealing transformation and suggests that it may attenuate democratic practices and worsen political (and perhaps others forms of ) inequality. Zsuzsa Csergo and James Goldgeier, in “Nationalist Strategies and European Integration,” focus on another sort of transformation, accompanying a different institutional dynamic. They reject the possibility that partial unification of European states through the European Union will eliminate old-fashioned nationalism. Nationalism is here to stay, at least in the foreseeable future. It is, however, splintering into four related but distinct ways of reconciling commitment to one’s group with the fact that state boundaries often do not coincide with nationality boundaries. Csergo and Goldgeier use their typology to explicate political choices in Eastern European politics, and they show how one form of nationalism morphs into another. It is probably not possible or even desirable to eliminate the passions and jealousies of nationalistic fervor; but as this article suggests, they can at least be understood better and at most be managed better—though whether through the European Union remains to be seen. Steven Teles and Matthew Kaliner, in “The Public Policy of Skepticism,” address the question of change from a more explicitly normative angle than the other articles in this issue. They start by analyzing Michael Oakeshott’s distinction between the politics of faith and the politics of skepticism. Oakeshott is (as are Teles and Kaliner) by and large more sympathetic to the latter, which generally encourages a move toward conservatism in politics and policy. But skepticism is not always the right choice, and it is not always conservative— and therein lies the value of Oakeshott’s framework. The authors then apply the Oakeshottian approach to three complex and controversial policy arenas: school choice, public health, and Social Security. In so doing, Teles and Kaliner exemplify Perspectives’ bridge-building mission and contribute a more sophisticated frame of reference to these policy disputes than they usually enjoy. The next article takes us from politics to policies and back again. In “The Consequences of Public Policy for Democratic Citizenship,” Suzanne Mettler and Joe Soss point to a curious lacuna in political scientists’ study of citizenship and policy debate. As a group, we appear to be more inclined to adopt a paradigm from another discipline—economics, psychology, sociology, history, or even literature—for studying politics than to focus on a purely political framework, even though we do not lack the concepts to develop the latter. Mettler and Soss bring together an array of scattered political tools and use them to construct a political argument about how policy choices shape the citizenry, who then face a new set of choices about priorities and alternatives that reshapes the citizenry, who then face . . . This dynamic affects who engages, how, why, what participants get from government, and how the government itself is thereby changed. Mettler and Soss do not themselves investigate the normative implications of their new framework, but it could easily extend into discussions of distributive justice, democratic deliberation, and theories of rights. The final article in the opening section of Perspectives takes the broadest and most ambitious look at change of them all. C. Mantzavinos, Douglass North, and Syed Shariq provide a bird’s-eye view of all learning, from individual to institutional and societal, in “Learning,…
We demonstrate a scalable approach for the generation of high average power femtosecond (fs) puls... more We demonstrate a scalable approach for the generation of high average power femtosecond (fs) pulse trains from Ti:sapphire by optically injection locking a resonant amplification cavity. We generate up to 7 W average power with over 30% optical extraction efficiency in a 68 fs pulse train operating at 95 MHz. This master oscillator power amplifier approach allows independent optimization of the fs laser while enabling efficient amplification to high average powers. The technique also enables coherent synchronization among multiple fs laser sources.
Success of oromandibular reconstructions is increasingly achieved through fundamental microvascul... more Success of oromandibular reconstructions is increasingly achieved through fundamental microvascular techniques that incorporate innovative adjunct modalities. We report a complex case of a large anterior mandibular plexiform ameloblastoma reconstructed with an iliac crest free flap in a young woman with bilateral peronea arteria magna. This article serves to highlight the application of several new technologies in an effort to provide a functional and cosmetically acceptable result.
The Journal of Bone and Joint Surgery-American Volume, 2009
BACKGROUND: Insertion of a radial head implant that results in radial overlengthening has been as... more BACKGROUND: Insertion of a radial head implant that results in radial overlengthening has been associated with altered elbow kinematics, increased radiocapitellar joint forces, capitellar erosions, early-onset arthritis, and loss of elbow flexion. The purpose of this study was to identify clinical and radiographic features that may be used to diagnose overlengthening of the radius intraoperatively and on postoperative radiographs.
Uploads
Papers by James Johnson