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Comparison of Estimated Glomerular Filtration Rate by the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) Equations with and without Cystatin C for Predicting Clinical Outcomes in Elderly Women  

PubMed Central

Background Reduced estimated glomerular filtration rate (eGFR) using the cystatin-C derived equations might be a better predictor of cardiovascular disease (CVD) mortality compared with the creatinine-derived equations, but this association remains unclear in elderly individuals. Aim The aims of this study were to compare the predictive values of the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI)-creatinine, CKD-EPI-cystatin C and CKD-EPI-creatinine-cystatin C eGFR equations for all-cause mortality and CVD events (hospitalizations±mortality). Methods Prospective cohort study of 1165 elderly women aged>70 years. Associations between eGFR and outcomes were examined using Cox regression analysis. Test accuracy of eGFR equations for predicting outcomes was examined using Receiver Operating Characteristic (ROC) analysis and net reclassification improvement (NRI). Results Risk of all-cause mortality for every incremental reduction in eGFR determined using CKD-EPI-creatinine, CKD-EPI-cystatin C and the CKD-EPI-creatinine-cystatic C equations was similar. Areas under the ROC curves of CKD-EPI-creatinine, CKD-EPI-cystatin C and CKD-EPI-creatinine-cystatin C equations for all-cause mortality were 0.604 (95%CI 0.561–0.647), 0.606 (95%CI 0.563–0.649; p?=?0.963) and 0.606 (95%CI 0.563–0.649; p?=?0.894) respectively. For all-cause mortality, there was no improvement in the reclassification of eGFR categories using the CKD-EPI-cystatin C (NRI -4.1%; p?=?0.401) and CKD-EPI-creatinine-cystatin C (NRI -1.2%; p?=?0.748) compared with CKD-EPI-creatinine equation. Similar findings were observed for CVD events. Conclusion eGFR derived from CKD-EPI cystatin C and CKD-EPI creatinine-cystatin C equations did not improve the accuracy or predictive ability for clinical events compared to CKD-EPI-creatinine equation in this cohort of elderly women. PMID:25265151

Turner, Robin M.; Lim, Ee M.; Thompson, Peter L.; Prince, Richard L.



A New Modified CKD-EPI Equation for Chinese Patients with Type 2 Diabetes  

PubMed Central

Objective To improve the performance of glomerular filtration rate (GFR) estimating equation in Chinese type 2 diabetic patients by modification of the CKD-EPI equation. Design and patients A total of 1196 subjects were enrolled. Measured GFR was calibrated to the dual plasma sample 99mTc-DTPA-GFR. GFRs estimated by the re-expressed 4-variable MDRD equation, the CKD-EPI equation and the Asian modified CKD-EPI equation were compared in 351 diabetic/non-diabetic pairs. And a new modified CKD-EPI equation was reconstructed in a total of 589 type 2 diabetic patients. Results In terms of both precision and accuracy, GFR estimating equations all achieved better results in the non-diabetic cohort comparing with those in the type 2 diabetic cohort (30% accuracy, P?0.01 for all comparisons). In the validation data set, the new modified equation showed less bias (median difference, 2.3 ml/min/1.73 m2 for the new modified equation vs. ranged from ?3.8 to ?7.9 ml/min/1.73 m2 for the other 3 equations [P<0.001 for all comparisons]), as was precision (IQR of the difference, 24.5 ml/min/1.73 m2 vs. ranged from 27.3 to 30.7 ml/min/1.73 m2), leading to a greater accuracy (30% accuracy, 71.4% vs. 55.2% for the re-expressed 4 variable MDRD equation and 61.0% for the Asian modified CKD-EPI equation [P?=?0.001 and P?=?0.02]). Conclusion A new modified CKD-EPI equation for type 2 diabetic patients was developed and validated. The new modified equation improves the performance of GFR estimation. PMID:25313918

Chen, Jinxia; Lv, Linsheng; Li, Ming; Lou, Tanqi



Tables for estimating the glomerular filtration rate using the new CKD-EPI equation from serum creatinine concentration.  


Chronic kidney disease (CKD) and its complications have become a major healthcare problem, both due to the resources that are required in the final stages of the disease and to secondary complications. As such, its early diagnosis is considered to be very important nowadays. The recently published 2013 KDIGO guidelines base the definition and classification of CKD on glomerular filtration values and albuminuria as staging criteria and prognostic markers of the disease. The MDRD and MDRD-IDMS equations (when creatinine values can be traced to the reference method) are those most used, but both the 2013 KDIGO international guidelines and the new 2013 CKD consensus document, in which ten scientific societies participated under the direction of the Spanish Society of Nephrology, recommend to be replaced by the CKD-EPI equation. Our objective has been, as with previous equations, to develop tables that display the estimated glomerular filtration rate value using the CKD-EPI equation from serum creatinine concentration, age and sex, and thereby provide an instrument that facilitates the dissemination of this new equation, particularly in settings where it is not calculated automatically. PMID:24658198

Canal, Cristina; Pellicer, Rodrigo; Facundo, Carme; Gràcia-Garcia, Silvia; Montañés-Bermúdez, Rosario; Ruiz-García, César; Furlano, Mónica; Da Silva, Iara K; Ballarín, José A; Bover, Jordi



Enzymatic creatinine assays allow estimation of glomerular filtration rate in stages 1 and 2 chronic kidney disease using CKD-EPI equation.  


The National Kidney Disease Education Program group demonstrated that MDRD equation is sensitive to creatinine measurement error, particularly at higher glomerular filtration rates. Thus, MDRD-based eGFR above 60 mL/min/1.73 m² should not be reported numerically. However, little is known about the impact of analytical error on CKD-EPI-based estimates. This study aimed at assessing the impact of analytical characteristics (bias and imprecision) of 12 enzymatic and 4 compensated Jaffe previously characterized creatinine assays on MDRD and CKD-EPI eGFR. In a simulation study, the impact of analytical error was assessed on a hospital population of 24084 patients. Ability using each assay to correctly classify patients according to chronic kidney disease (CKD) stages was evaluated. For eGFR between 60 and 90 mL/min/1.73 m², both equations were sensitive to analytical error. Compensated Jaffe assays displayed high bias in this range and led to poorer sensitivity/specificity for classification according to CKD stages than enzymatic assays. As compared to MDRD equation, CKD-EPI equation decreases impact of analytical error in creatinine measurement above 90 mL/min/1.73 m². Compensated Jaffe creatinine assays lead to important errors in eGFR and should be avoided. Accurate enzymatic assays allow estimation of eGFR until 90 mL/min/1.73 m² with MDRD and 120 mL/min/1.73 m² with CKD-EPI equation. PMID:24220551

Kuster, Nils; Cristol, Jean-Paul; Cavalier, Etienne; Bargnoux, Anne-Sophie; Halimi, Jean-Michel; Froissart, Marc; Piéroni, Laurence; Delanaye, Pierre



Impact on cardiovascular risk follow-up from a shift to the CKD-EPI formula for eGFR reporting: a cross-sectional population-based primary care study  

PubMed Central

Objective To assess the impact on cardiovascular risk factor management in primary care by the introduction of chronic kidney disease epidemiological collaboration (CKD-EPI) for estimated-glomerular filtration rate (eGFR) reporting. Design and setting Cross-sectional study of routine healthcare provision in 47 primary care practices in The Netherlands with Modification of Diet and Renal Disease Study eGFR reporting. Methods eGFR values were recalculated using CKD-EPI in patients with available creatine tests. Patients reclassified from CKD stage 3a to CKD stage 2 eGFR range were compared to those who remained in stage 3a for differences in demographic variables, blood pressure, comorbidity, medication usage and laboratory results. Results Among the 60?673 adult patients (37% of adult population) with creatine values, applying the CKD-EPI equation resulted in a 16% net reduction in patients with CKD stage 3 or worse. Patients reclassified from stage 3a to 2 had lower systolic blood pressure (139.7 vs 143.3?mm?Hg p<0.0001), higher diastolic blood pressure (81.5 vs 78.4?mm?Hg p<0.0001) and higher cholesterol (5.4 vs 5.1?mmol/L p<0.0001) compared to those who remained in stage 3a. Of those reclassified out of a CKD diagnosis 463 (32%) had no comorbidities that would qualify for annual CVD risk factor assessment and 20 (12% of those with sufficient data) had a EuroSCORE CVD risk >20% within 10?years. Conclusions Use of the CKD-EPI equation will result in many patients being removed from CKD registers and the associated follow-up. Current risk factor assessment in this group may be lacking from routine data and some patients within this group are at an increased risk for cardiovascular events. PMID:24071463

van Gelder, Vincent A; Scherpbier-de Haan, Nynke D; de Grauw, Wim J C; O'Callaghan, Christopher A; Wetzels, Jack F M; Lasserson, Daniel S



Comparison between Three Different Equations for the Estimation of Glomerular Filtration Rate in Omani Patients with Type 2 Diabetes Mellitus  

PubMed Central

Objectives: Estimated glomerular filtration rate (eGFR) is an important component of a patient’s renal function profile. The Modification of Diet in Renal Disease (MDRD) equation and the Chronic Kidney Disease-Epidemiology Collaboration (CKD-EPI) equation are both commonly used. The aim of this study was to compare the performance of the original MDRD186, revised MDRD175 and CKD-EPI equations in calculating eGFR in type 2 diabetes mellitus (T2DM) patients in Oman. Methods: The study included 607 T2DM patients (275 males and 332 females, mean age ± standard deviation 56 ± 12 years) who visited primary health centres in Muscat, Oman, during 2011 and whose renal function was assessed based on serum creatinine measurements. The eGFR was calculated using the three equations and the patients were classified based on chronic kidney disease (CKD) stages according to the National Kidney Foundation Kidney Disease Outcomes Quality Initiative guidelines. A performance comparison was undertaken using the weighted kappa test. Results: The median eGFR (mL/min/1.73 m2) was 92.9 for MDRD186, 87.4 for MDRD175 and 93.7 for CKD-EPI. The prevalence of CKD stage 1 was 55.4%, 44.7% and 57% while for stages 2 and 3 it was 43.2%, 54% and 41.8%, based on MDRD186, MDRD175 and CKD-EPI, respectively. The agreement between MDRD186 and CKD-EPI (? 0.868) was stronger than MDRD186 and MDRD175 (? 0.753) and MDRD175 and CKD-EPI (? 0.730). Conclusion: The performances of MDRD186 and CKD-EPI were comparable. Considering that CKD-EPI-based eGFR is known to be close to isotopically measured GFR, the use of MDRD186 rather than MDRD175 may be recommended. PMID:24790742

Al-Maqbali, Salima R. S.; Mula-Abed, Waad-Allah S.



A comparison of CKD-EPI estimated glomerular filtration rate and measured creatinine clearance in recently admitted critically ill patients with normal plasma creatinine concentrations  

PubMed Central

Background The Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) estimated glomerular filtration rate (eGFR) has been widely integrated into clinical practice. Although useful in screening for CKD, its’ application in critically ill patients with normal plasma creatinine concentrations remains uncertain. The aim of this study was to assess the performance of CKD-EPI eGFR in comparison to creatinine clearance (CLCR) in this setting. Methods This prospective observational study was performed in a tertiary level, university affiliated intensive care unit (ICU). Study participants had to have an expected ICU length of stay?>?24 hours, a plasma creatinine concentration?CKD-EPI eGFR was compared against 8-hour measured urinary CLCR. Data capture occurred within 48 hours of admission. Results One hundred and ten patients (n?=?110) were enrolled in the study. 63.6% were male, the mean age was 50.9 (16.9) years, 57.3% received invasive mechanical ventilation, and 30% required vasopressor support. The mean CLCR was 125 (45.1) ml/min/1.73 m2, compared to a CKD-EPI eGFR of 101 (23.7) ml/min/1.73 m2 (P?CKD-EPI eGFR between 60–119 ml/min/1.73 m2 (n?=?77), 41.6% displayed augmented renal clearance (CLCR???130 ml/min/1.73 m2), while 7.8% had a CLCR?CKD-EPI eGFR and measured CLCR produce significantly disparate results when estimating renal function in this population. Clinicians should consider carefully which value they employ in clinical practice, particularly drug dose modification. PMID:24225349



Estimation of glomerular filtration rate by MDRD equation in athletes: role of body surface area  

Microsoft Academic Search

Creatinine-based equations to estimate the glomerular filtration rate (GFR) have recently been advocated over serum creatinine\\u000a values as a valuable tool to more accurately assess kidney function. The Cockcroft–Gault (CG) equation requires a body weight\\u000a parameter, whereas the Chronic Kidney Disease-Epidemiology Collaboration (CKD-EPI) and Modification of Diet in Renal Disease\\u000a (MDRD) Study equations do not. In this study we evaluated

Radoje Milic; Alessandra Colombini; Giovanni Lombardi; Patrizia Lanteri; Giuseppe Banfi


Use of glomerular filtration rate estimating equations for drug dosing in HIV-positive patients  

PubMed Central

Background Current HIV treatment guidelines recommend using the Cockcroft-Gault equation for drug dosing adjustments. The use of newer glomerular filtration rate (GFR) estimating equations for drug dosing and the appropriateness of physician antiretroviral dosing based on estimated kidney function have not been studied in an HIV-positive population. Methods We evaluated concordance between measured and estimated GFR for the assignment of kidney function categories designated by the Food and Drug Administration (FDA) Guidance for Industry for pharmacokinetic studies, and appropriateness of physician antiretroviral drug dosing for level of kidney function in 200 HIV-positive patients on stable antiretroviral therapy. Estimated kidney function was determined using the Chronic Kidney Disease-Epidemiology collaboration (CKD-EPI), Modification of Diet in Renal Disease (MDRD) Study and Cockcroft-Gault equations. Results For assignment of FDA-designated kidney function categories, concordance rates between measured and estimated GFR using the CKD-EPI, MDRD Study and Cockcroft-Gault equations were 79%, 71% and 77%, respectively. This pattern was consistent across most subgroups. When actual prescribed dosages were compared to recommended dosages based on the level of estimated kidney function, 3% to 19% of study participants were prescribed higher than recommended dosages. The largest discordance between prescribed and recommended dosages was observed for the Cockcroft-Gault equation. Conclusions The CKD-EPI equation has the highest concordance with measured GFR for the assignment of FDA-designated kidney function categories. Its use may lead to lower dosing related errors in HIV-infected US adults on stable antiretroviral therapy. More education is required with respect to dose adjustment for level of kidney function. PMID:23963249

Okparavero, Aghogho A; Tighiouart, Hocine; Krishnasami, Zipporah; Wyatt, Christina M; Graham, Hiba; Hellinger, James; Inker, Lesley A



Glomerular Filtration Rate Equations Overestimate Creatinine Clearance in Older Individuals Enrolled in the Baltimore Longitudinal Study on Aging (BLSA): Impact on Renal Drug Dosing  

PubMed Central

Objectives To evaluate performance of kidney function estimation equations and to determine the frequency of drug dose discordance in an older population. Design Cross-sectional analysis of data from community-dwelling volunteers randomly selected from the Baltimore Longitudinal Study of Aging from January 1, 2005–December 31, 2010. Subjects Two hundred sixty-nine men and women with a mean ± SD age of 81 ± 6 years, mean serum creatinine concentration (Scr) of 1.1 ± 0.4 mg/dl, and mean measured 24-hour creatinine clearance (mClcr) of 53 ± 13 ml/minute. Measurements and Main Results Kidney function was estimated by using the following equations: Cockcroft-Gault (CG), Modification of Diet in Renal Disease Study (MDRD), and Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI). The performance of each equation was assessed by measuring bias and precision relative to mClcr. Dose calculation errors (discordance) were determined for 10 drugs requiring renal dosage adjustments to avoid toxicity when compared to the FDA-approved dosages. The CG equation was the least biased estimate of mClcr. The MDRD and CKD-EPI equations were significantly positively biased compared to CG (mean ± SD 34 ± 20% and 22 ± 15%, respectively, p<0.001) and mClcr (29 ± 47% and 18 ± 40%, respectively, p<0.001). Rounding low Scr values (< 1.0 mg/dl) up to an arbitrary value of 1.0 mg/dL resulted in CG values (44±10 mL/min) that were significantly lower than mClcr (56±12 mL/min, p<0.001) and CG (56±15 mL/min, p<0.001). The MDRD and CKD-EPI equations had median dose discordance rates of 28.6% and 22.9%, respectively. Conclusion The MDRD and CKD-EPI equations significantly overestimated creatinine clearance (mClcr and CG) in elderly individuals. This leads to dose calculation errors for many drugs, particularly in individuals with severe renal impairment. Thus, GFR-estimating equations should not be substituted in place of the CG equation in older adults for the purpose of renal dosage adjustments. In addition, the common practice of rounding or replacing low Scr values with an arbitrary value of 1.0 mg/dL for use in the CG equation should be avoided. Additional studies that evaluate alternative eGFR equations in the older populations that incorporate pharmacokinetic and pharmacodynamic outcomes measures are needed. PMID:23625813

Dowling, Thomas C.; Wang, En-Shih; Ferrucci, Luigi; Sorkin, John D.



Using Mathematical Algorithms to Modify Glomerular Filtration Rate Estimation Equations  

PubMed Central

Background The equations provide a rapid and low-cost method of evaluating glomerular filtration rate (GFR). Previous studies indicated that the Modification of Diet in Renal Disease (MDRD), Chronic Kidney Disease-Epidemiology (CKD-EPI) and MacIsaac equations need further modification for application in Chinese population. Thus, this study was designed to modify the three equations, and compare the diagnostic accuracy of the equations modified before and after. Methodology With the use of 99 mTc-DTPA renal dynamic imaging as the reference GFR (rGFR), the MDRD, CKD-EPI and MacIsaac equations were modified by two mathematical algorithms: the hill-climbing and the simulated-annealing algorithms. Results A total of 703 Chinese subjects were recruited, with the average rGFR 77.14±25.93 ml/min. The entire modification process was based on a random sample of 80% of subjects in each GFR level as a training sample set, the rest of 20% of subjects as a validation sample set. After modification, the three equations performed significant improvement in slop, intercept, correlated coefficient, root mean square error (RMSE), total deviation index (TDI), and the proportion of estimated GFR (eGFR) within 10% and 30% deviation of rGFR (P10 and P30). Of the three modified equations, the modified CKD-EPI equation showed the best accuracy. Conclusions Mathematical algorithms could be a considerable tool to modify the GFR equations. Accuracy of all the three modified equations was significantly improved in which the modified CKD-EPI equation could be the optimal one. PMID:23472113

Zhu, Bei; Wu, Jianqing; Zhu, Jin; Zhao, Weihong



Estimation of glomerular filtration rate by MDRD equation in athletes: role of body surface area.  


Creatinine-based equations to estimate the glomerular filtration rate (GFR) have recently been advocated over serum creatinine values as a valuable tool to more accurately assess kidney function. The Cockcroft-Gault (CG) equation requires a body weight parameter, whereas the Chronic Kidney Disease-Epidemiology Collaboration (CKD-EPI) and Modification of Diet in Renal Disease (MDRD) Study equations do not. In this study we evaluated the effect of the calculated body surface area (BSA) on MDRD values in professional athletes characterized from different body mass index, gender, and sport discipline. Serum creatinine concentration was measured by Jaffe reaction in 17 male rugby players and 28 male and 26 female swimmers, before the start of training and throughout the competitive season. The values of estimated GFR (eGFR) calculated for creatinine determination by means of CG and CDK-EPI with respect to MDRD formula showed a significant difference in different groups of athletes. The statistical significance was confirmed for BSA-corrected MDRD-derived eGFR values in rugby players and in male swimmers, but not in female swimmers, who showed a BSA close to the "standard" value of 1.73 m(2) traditionally included in MDRD equation. The CG equation can overestimate the eGFR in healthy overweight subjects such as rugby players, whereas the MDRD formula systematically underestimates it. The differences between the two equations increase as a function of BMI, appearing highest in rugby players and lowest in female swimmers. Real BSA correction of the MDRD equation could help to avoid an overestimation of renal excretory function in subjects with increased BSA. PMID:21519889

Milic, Radoje; Colombini, Alessandra; Lombardi, Giovanni; Lanteri, Patrizia; Banfi, Giuseppe



The Sask Formula to Estimate Glomerular Filtration Rate in Renal Transplant Patients  

Microsoft Academic Search

The aim of this study was to develop a glomerular filtration rate (GFR) equation for renal transplant and compare its performance with Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) and isotope dilution mass spectrometry (IDMS) equations. Using genetic symbolic regression analysis, the Sask equation was developed from a training sample of 772 isotope GFR (iGFR) scans performed in 99 transplanted patients.

Mohammad Akhtar Hossain; Hamdi Elmoselhi; Amin A. Elshorbagy; Ahmed Shoker



Determining Glomerular Filtration Rate in Homozygous Sickle Cell Disease: Utility of Serum Creatinine Based Estimating Equations  

PubMed Central

Background Various estimating equations have been developed to estimate glomerular filtration rate (GFR) for use in clinical practice. However, the unique renal physiological and pathological processes that occur in sickle cell disease (SCD) may invalidate these estimates in this patient population. This study aims to compare GFR estimated using common existing GFR predictive equations to actual measured GFR in persons with homozygous SCD. If the existing equations perform poorly, we propose to develop a new estimating equation for use in persons with SCD. Methods 98 patients with the homozygous SS disease (55 females: 43 males; mean age 34±2.3 years) had serum measurements of creatinine, as well as had GFR measured using 99mTc-DTPA nuclear renal scan. GFR was estimated using the Modification of Diet in Renal Disease (MDRD), Cockcroft-Gault (CG), and the serum creatinine based CKD-EPI equations. The Bland-Altman limit of agreement method was used to determine agreement between measured and estimated GFR values. A SCD-specific estimating equation for GFR (JSCCS-GFR equation) was generated by means of multiple regression via backward elimination. Results The mean measured GFR±SD was 94.9±27.4 mls/min/1.73 m2 BSA, with a range of 6.4–159.0 mls/min/1.73 m2. The MDRD and CG equations both overestimated GFR, with the agreement worsening with higher GFR values. The serum creatinine based CKD-EPI equation performed relatively well, but with a systematic bias of about 45 mls/min. The new equation developed resulted in a better fit to our sickle cell disease data than the MDRD equation. Conclusion Current estimating equations, other than the CKD-EPI equation, do not perform very accurately in persons with homozygous SS disease. A fairly accurate estimating equation, suitable for persons with GFR >60 mls/min/1.73 m2 has been developed from our dataset and validated within a simulated dataset. PMID:23894560

Asnani, Monika R.; Lynch, O'Neil; Reid, Marvin E.



Prevalence and determinants of chronic kidney disease in community-dwelling elderly by various estimating equations  

PubMed Central

Background Chronic kidney disease (CKD) represents a global public health problem. Few data exist in the elderly. The objective of the current study is to estimate the prevalence of CKD by means of various established and new equations and to identify the main determinants of CKD in elderly. Methods The ActiFE Ulm (Activity and Function in the Elderly in Ulm) study is a population-based cohort study in people of 65?years and older. Kidney function was assessed by means of estimated glomerular filtration rate (eGFR) based on two creatinine- (Cr-; MDRD, CKD-EPI) and one cystatin C - (CysC-) based method. The relationship between various potential risk factors and CKD was quantified using unconditional logistic regression. Results A total of 1471 subjects were in the final analysis (mean age 75.6?years, SD 6.56). Overall, prevalence of CKD (eGFR?CKD-EPI, and 14.6% by the CysC-based eGFR. All eGFRs showed statistically significant correlations with C-reactive protein, uric acid, as well as with lipid values. In multivariable analysis age was clearly related to prevalence of CKD and the risks were highest with the CysC-based equation. Females had a higher risk for CKD stages 3–5 with MDRD (OR 1.63; 95% CI: 1.23–2.16) whereas the OR was 1.23 (95% CI 0.92–1.65) with the CKD-Epi and OR?=?0.89 (95% CI 0.58–1.34) with the CysC-based equation after multivariable adjustment. Although the cystatin C based definition of CKD resulted in a lower prevalence compared to the creatinine based ones, other measures of renal damage such as albuminuria were more prevalent in those defined by CysC-eGFR. Conclusions Prevalence of CKD is very variable based on the used estimating equation. More work is needed to evaluate the various estimating equations especially in elderly before we are able to assess the practical consequences of the observed differences. PMID:22574773



Multicenter Study of Creatinine- and/or Cystatin C-Based Equations for Estimation of Glomerular Filtration Rates in Chinese Patients with Chronic Kidney Disease  

PubMed Central

Objective To establish equations for the estimation of glomerular filtration rates (eGFRs) based on serum creatinine (SCr) and/or serum cystatin C (SCysC) in Chinese patients with chronic kidney disease (CKD), and to compare the new equations with both the reference GFR (rGFR) and the literature equations to evaluate their applicability. Methods The 788 Chinese CKD patients were randomly divided into two groups, the training group and the testing group, to establish new eGFR-formulas based on serum CysC and to validate the established formulas, respectively. 99mTc-DTPA clearance (as the rGFR), serum Cr, and serum CysC were determined for all patients, and GFR was calculated using the Cockcroft-Gault equation (eGFR1), the MDRD formula (eGFR2), the CKD-EPI formulas (eGFR3, eGFR4), and the Chinese eGFR Investigation Collaboration formulas (eGFR5, eGFR6). The accuracy of each eGFR was compared with the rGFR. Results The training and testing groups' mean GFRs were 50.84±31.36 mL/min/1.73 m2 and 54.16±29.45 mL/min/1.73 m2, respectively. The two newly developed eGFR formulas were fitted using iterative computation: and . Significant correlation was observed between each eGFR and the rGFR. However, proportional errors and constant errors were observed between rGFR and eGFR1, eGFR2, eGFR4, eGFR5 or eGFR6, and constant errors were observed between eGFR3 and rGFR, as revealed by the Passing & Bablok plot analysis. The Bland-Altman analysis illustrated that the 95% limits of agreement of all equations exceeded the previously accepted limits of <60 mL/min •1.73 m2, except the equations of eGFR7 and eGFR8. Conclusion The newly developed formulas, eGFR7 and eGFR8, provide precise and accurate GFR estimation using serum CysC detection alone or in combination with serum Cr detection. Differences in detection methods should be carefully considered when choosing literature eGFR equations to avoid misdiagnosis and mistreatment. PMID:23526939

Zhang, Lin; Li, Xue-mei; Yang, Yu-wei; Zeng, Ping; Guo, Xiu-zhi; Qin, Yan; Liu, Hong-chun; Han, Xing-min; Li, Yan-peng; Xu, Wei; Sun, Shu-yan; Wang, Li-qiang; Quan, Hui; Xia, Li-jun; Hu, Hong-zhang; Zhong, Fang-cai; Duan, Rong




ERIC Educational Resources Information Center

This article explores different approaches that facilitate online collaboration. The newest efforts in collaboration revolve around wikis. These websites allow visitors to add, remove, edit, and change content directly online. Another fairly affordable approach involves open source, a programming language that is, in many ways, collaborative

Villano, Matt



Comparisons between validated estimated glomerular filtration rate (GFR) equations and isotopic GFR in HIV patients  

PubMed Central

Objective Understanding how best to measure renal function in HIV-infected patients is critical because estimated glomerular filtration rate (eGFR) in HIV-infected patients can be affected by ethnicity and body composition. We validated the available eGFR equations and compared them to the plasma 99mTc-diethylenetriaminepentaacetic acid (99mTc-DTPA) clearance in HIV-infected patients. Design Test of diagnostic accuracy. Methods 196 HIV-infected patients underwent measuring 99mTc-DTPA plasma clearance, 5 creatinine-based eGFR equations, cystatin-C GFR and 24-hour urine creatinine clearance (CrCl). Results Mean (SD) 99mTc-DTPA GFR was 117.7±29.2 mL/min per 1.73 m2. The re-expressed MDRD, CKD-EPI, re-expressed MDRD formula with Thai racial correction factor, Thai eGFR equation, Cockcroft & Gault, cystatin-C GFR, and 24 hr urine CrCl, underestimated the reference GFR. The bias estimated by the mean of differences the limits of agreement for the re-expressed MDRD equation, CKD-EPI, re-expressed MDRD formula with Thai racial correction factor, Thai eGFR, Cockcroft & Gault, cystatin C, and 24 hr urine CrCl can be expressed as 18.9±27.3, 11.1±25.5, 6.2±28.8, 13.5±27.0, 30.4±28.0, 3.2±36.1, and 5.0±12.1 mL/min per 1.73 m2 respectively. Conclusion The available eGFR equations underestimated GFR in HIV-infected adults. However, the eGFR by cystacin C GFR was the most precise and accurate. Among Cr-based eGFR equations, re-expressed MDRD formula with Thai racial correction factor was the most precise and accurate. The racial factor for each ethnicity is important and the existing eGFR equation should be validated before using it in the HIV population. PMID:22713478

Praditpornsilpa, Kearkiat; Avihingsanon, Anchalee; Chaiwatanarat, Tawatchai; Chaiyahong, Prachya; Wongsabut, Jiratchaya; Ubolyam, Sasiwimol; Chulakadabba, Adhisabandh; Avihingsanon, Yingyos; Ruxrungtham, Kiat; Tunsanga, Kriang; Eiam-Ong, Somchai; Phanuphak, Praphan



[New topics regarding equations for GFR estimation based on serum creatinine and cystatin C].  


Japanese GFR equations and CKD-EPI equations based on standardized serum creatinine and standardized cystatin C are recommended in recent Japanese CKD guides and KDIGO guidelines for CKD management, respectively. CKD-EPIcreat overestimates GFR in Japanese subjects, probably due to the difference in muscle mass between Japanese and Caucasians. Unlike CKD-EPIcreat, CKD-EPIcys performs well in Japanese subjects, indicating the advantages of using cystatin C as a GFR marker. KDIGO guidelines suggest measuring eGFRcys in adults with eGFRcreat of 45-59 ml/min/1.73 m2 who do not have markers of kidney damage if confirmation of CKD is required. Creatinine is excreted by glomerular filtration, but also secreted by the tubules. Alteration of the tubular secretion of creatinine may influence the performance of GFR equations based on serum creatinine. Multivariate analysis showed that GFR and serum albumin levels were independent parameters affecting the fractional excretion of creatinine (FE-Cr). Alteration of FE-Cr according to the serum albumin levels may be one of the reasons for the bias of GFR equations based on serum creatinine. Low GFR is a risk factor for all-cause and cardiovascular mortality in a general population. However, the relationship between eGFR and the hazard risk of events is different depending on whether cystatin C or creatinine is used to calculate eGFR. The association between eGFRcys and the hazard risk is much stronger compared with eGFRcreat. Cystatin C may be a useful alternative to creatinine for detecting a high risk of complications in a general population and subjects with CKD. PMID:24800491

Horio, Masaru



Importance of urinary NGAL, serum creatinine standardization and estimated glomerular filtration rate in resistant hypertension.  


In patients with resistant hypertension (RH) we investigated the importance of urinary neutrophil gelatinase-associated lipocalin (uNGAL- a chemiluminescent microparticle immunoassay (CMIA) method became using (Abbott Diagnostics) for the measurement of NGAL in urine samples) and incidence of chronic kidney disease using the Modification of Diet in Renal Disease Study (MDRD) and Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equations in estimating glomerular filtration rate (eGFR) based on standardised serum creatinine method traceable to isotope dilution mass spectrometry (IDMS) method. It would have been difficult to predict that levels of these biomarker would perform better organ damage than traditional measurements of kidney function such as standardised serum creatinine, MDRD, or CKD-EPI equations in special population such as RH. Serum creatinine concentrations were measured in 50 patients (24M:26F from RH Registar in Clinical Hospital Merkur) by the kinetic Jaffe method. There were no significant differences between the GFR values derived by MDRD and CKD-EPI equations in the group of patients with RH. 62% of patients have eGFR > 60 mL/minl/1.73 m2, while a 38% of patients have eGFR < 60 mL/min/1.73 m2. The measurement of NGAL in urine samples of 40 patients with RH showed no difference and seems to be of no use in further determination of renal impairement. Higher value of uNGAL in some resistant hypertension patients could have link in the repair stage after AKI and would reveal pathways that could link AKI and CKD. PMID:24308223

Prkacin, Ingrid; Ozvald, Ivan; Cavri?, Gordana; Balenovi?, Diana; Bulum, Tomislav; Flegar-Mestri?, Zlata



Association between Kidney Function and Framingham Global Cardiovascular Disease Risk Score: A Chinese Longitudinal Study  

PubMed Central

Background Chronic kidney disease (CKD) is generally considered an independent risk factor for cardiovascular disease (CVD) development, but rates in individuals with estimated glomerular filtration rate (eGFR) >60 ml/min/1.73 m2 are uncertain. The Framingham global CVD risk score (FRS) equation is a widely accepted tool used to predict CVD risk in the general population. The purpose of the present study was to examine whether an association exists between eGFR and FRS in a Chinese population with no CKD or CVD. Methods A total of 333 participants were divided into three groups based on FRS. The Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation and CKD-EPI equation for Asians (CKD-EPI-ASIA) were used to measure eGFR. Results A significant inverse association between eGFR and FRS was confirmed with Pearson correlation coefficients of –0.669, –0.698 (eGFRCKD-EPI, P<0.01) and –0.658, –0.690 (eGFRCKD-EPI-ASIA, P<0.01). This association gradually diminished with progression from the low- to high-risk groups (eGFRCKD-EPI, r?=?–0.615, –0.282, –0.197, P<0.01, P<0.01, P>0.05; similar results according to the CKD-EPI-ASIA equation). In the low- or moderate-risk new-groups, this association became stronger with increased FRS (eGFRCKD-EPI-ASIA, r?=?–0557, –0.622 or –0.326, –0.329, P<0.01). In contrast to the results from 2008, eGFR was independently associated with FRS following adjustment for traditional cardiovascular risk factors (P<0.05). Conclusion Renal function has multiple influences on predicting CVD risk in various populations. With increasing FRS and decreasing eGFR, it is also independently associated with CVD, even in individuals with eGFR >60 ml/min/1.73 m2. PMID:24465883

Jin, Bo; Bai, Xiaojuan; Han, Lulu; Liu, Jing; Zhang, Weiguang; Chen, Xiangmei



Collaborative Attack vs. Collaborative Defense  

NASA Astrophysics Data System (ADS)

We have witnessed many attacks in the cyberspace. However, most attacks are launched by individual attackers even though an attack may involve many compromised computers. In this paper, we envision what we believe to be the next generation cyber attacks — collaborative attacks. Collaborative attacks can be launched by multiple attackers (i.e., human attackers or criminal organizations), each of which may have some specialized expertise. This is possible because cyber attacks can become very sophisticated and specialization of attack expertise naturally becomes relevant. To counter collaborative attacks, we might need collaborative defense because each “chain” in a collaborative attack may be only adequately dealt with by a different defender. In order to understand collaborative attack and collaborative defense, we present a high-level abstracted framework for evaluating the effectiveness of collaborative defense against collaborative attacks. As a first step towards realizing and instantiating the framework, we explore a characterization of collaborative attacks and collaborative defense from the relevant perspectives.

Xu, Shouhuai


Industry Collaborations

Skip to Content Home | Investigator Resources | Protocol Development | Initiatives/Programs/Collaborations | Links to More Resources | Funding Opportunities | About CTEP Home | Sitemap | Contact CTEP Search this site Industry Collaborations Guidelines


Teacher Collaboration  

NSDL National Science Digital Library

In this group of three 5-minute videos for teachers of grades 3 through 8, three co-teaching teams describe how they work within the same classroom, collaborating on math instruction. Each pair, one classroom teacher and one special educator, talk of the benefits that collaborative teaching can offer and share their experiences of teaching mathematics in an inclusion classroom.



Symmetric factorization Riccati equations  

E-print Network

Symmetric factorization Riccati equations and Bezoutians collaboration with I. Karelin and L. Lerer() - C(I - A)-1B is analytic over the whole complex plane, and · (A, B, C) is minimal. #12;Special case�-invariant subspace is of the form M� = Im X I , where X = X satisfies the algebraic Riccati equation XCCX + X(A - BC


Differences in estimation of creatinine generation between renal function estimating equations in an Indian population: cross-sectional data from the Hyderabad arm of the Indian migration study  

PubMed Central

Background Creatinine based formulae for estimating renal function developed in white populations may be less valid in other ethnic groups. We assessed the performance of various estimating formulae in an Indian population. Methods 917 subjects were recruited from the Hyderabad arm of the Indian Migration Study. Data were collected on comorbidity, serum creatinine and body composition from DXA scans. Renal function was compared using the modified Cockcroft-Gault, MDRD and CKD-EPI formulae. 24-hour creatinine production was derived from each estimate and the agreement with measured muscle mass examined. 24-hour creatinine production estimates were compared to that derived from a formula by Rule incorporating DXA measured muscle mass. Potential systematic biases were examined by age and eGFR. We assessed the association of renal function by each formula with hypertension and self-reported measures of vascular disease. Results Mean modified Cockcroft-Gault eCCl was 98.8?ml/min/1.73?m2, MDRD eGFR 91.2?ml/min/1.73?m2 and CKD-EPI eGFR 96.3?ml/min/1.73?m2. MDRD derived 24-hour creatinine production showed the least age-related underestimation compared to the Rule formula. CKD-EPI showed a marked bias at higher eGFRs. All formulae showed similar strength associations with vascular disease and hypertension. Conclusions Our analyses support the use of MDRD for estimating renal function in Indian populations. Further work is required to assess the predictive value of formulae for incident disease and complications of CKD. PMID:23379609



Literacy Collaborative.  

ERIC Educational Resources Information Center

This paper provides an overview of Literacy Collaborative, a comprehensive, schoolwide program designed to provide long-term support to schools working toward successful literacy achievement for every child by the end of 2nd grade. There are currently (year 2000) 390 literacy coordinators or trainers serving 372 schools in 25 states. The…

Education Commission of the States, Denver, CO.


Innovative Collaboration  

Microsoft Academic Search

The focus of this paper is Innovative Collaboration and how this is achieved through using the successful assimilation of Moodle into the blended learning environment. Moodle is a course management system (CMS) ­ a free, Open Source software package designed using sound pedagogical principles, to help educators create effective online learning communities 1 . Teaching and learning in any subject

Gillian A Rawlings



Collaborative Spaces  

ERIC Educational Resources Information Center

When architects discuss the educational facilities of the next century and beyond, the conversation turns to collaborative spaces. They envision flexible and fluid spaces that will encourage creative and critical thinking, and free students to communicate clearly about the task at hand. While these are admirable ideals, there are some fundamental…

Lippman, Peter C.



Industry Collaboration

The goal of the Cancer Therapy Evaluation Program (CTEP) is to facilitate the process of bringing promising, novel, investigational anticancer and anti-HIV agents to the public as quickly and as safely as possible. CTEP offers a unique combination of resources and expertise to assist an Industry Collaborator in clinical development of new therapeutic agents and the ability to evaluate investigational agents in a wide variety of tumor types and disease settings.


Industry Collaboration

Phase 2 N01 Program The Phase 2 N01 Program is a CTEP-CIP collaboration includes 7 contractors, most of whom consist of multi-institutional consortia, and includes a total of 22 NCI-designated Cancer Centers. These sites carry out early clinical trials with CTEP and CIP-held IND agents, with an emphasis on phase 2 trials, but including phase 1 trials as well. These trials include the evaluation of novel imaging agents and methods to enhance the evaluation of novel therapeutics.


Estimated Glomerular Filtration Rate (eGFR): A Serum Creatinine-Based Test for the Detection of Chronic Kidney Disease and its Impact on Clinical Practice  

PubMed Central

Chronic kidney disease (CKD) is an important epidemic and public health problem that is associated with a significant risk for vascular disease and early cardiovascular mortality as well as progression of kidney disease. Currently it is classified into five stages based on the glomerular filtration rate (GFR) as recommended by many professional guidelines. Radiolabelled methods for measuring GFR are accurate but not practical and can be used only on a very limited scale while the traditional methods require timed urine collection with its drawback of inaccuracy, cumbersomeness and inconvenience for the patients. However, the development of formula- based calculation of estimated GFR (eGFR) has offered a very practical and easy approach for converting serum creatinine value into GFR result taking into consideration patient’s age, sex, ethnicity and weight (depending on equation type). The commonly used equations include Cockraft and Gault (1976), Modification of Diet in Renal Disease (MDRD) (1999) and Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) (2009). It is the implementation of these equations particularly the MDRD that has raised the medical awareness in the diagnosis and management of CKD and its adoption by many guidelines in North America and Europe. The impact and pitfalls of each of these equations in the screening, diagnosis and management of patients with CKD are presented and discussed in this review. PMID:22496934

Mula-Abed, Waad-Allah S.; Al Rasadi, Khalid; Al-Riyami, Dawood



Collaborative Understanding of Cyanobacteria in Lake Ecosystems  

ERIC Educational Resources Information Center

We describe a collaboration between mathematicians and ecologists studying the cyanobacterium "Gloeotrichia echinulata" and its possible role in eutrophication of New England lakes. The mathematics includes compartmental modeling, differential equations, difference equations, and testing models against high-frequency data. The ecology…

Greer, Meredith L.; Ewing, Holly A.; Cottingham, Kathryn L.; Weathers, Kathleen C.



Calibration and precision of serum creatinine and plasma cystatin C measurement: impact on the estimation of glomerular filtration rate.  


Serum creatinine (SCr) is the main variable for estimating glomerular filtration rate (GFR). Due to inter-assay differences, the prevalence of chronic kidney disease (CKD) varies according to the assay used, and calibration standardization is necessary. For SCr, isotope dilution mass spectrometry (IDMS) is the gold standard. Systematic differences are observed between Jaffe and enzymatic methods. Manufacturers subtract 0.30 mg/dl from Jaffe results to match enzymatic results ('compensated Jaffe method'). The analytical performance of enzymatic methods is superior to that of Jaffe methods. In the original Modification of Diet in Renal Disease (MDRD) equation, SCr was measured by a Jaffe Beckman assay, which was later recalibrated. A limitation of this equation was an underestimation of GFR in the high range. The Chronic Kidney Disease Epidemiology (CKD-EPI) consortium proposed an equation using calibrated and IDMS traceable SCr. The gain in performance was due to improving the bias whereas the precision was comparable. The CKD-EPI equation performs better at high GFR levels (GFR >60 ml/min/1.73 m(2)). Analytical limitations have led to the recommendation to give a grade (>60 ml/min/1.73 m(2)) rather than an absolute value with the MDRD equation. By using both enzymatic and calibrated methods, this cutoff-grade could be increased to 90 ml/min/1.73 m(2) (with MDRD) and 120 ml/min/1.73 m(2) (with CKD-EPI). The superiority of the CKD-EPI equation over MDRD is analytical, but the precision gain is limited. IDMS traceable enzymatic methods have been used in the development of the Lund-Malmö (in CKD populations) and Berlin Initiative Study equations (in the elderly). The analytical errors for cystatin C are grossly comparable to issues found with SCr. Standardization is available since 2011. A reference method for cystatin C is still lacking. Equations based on standardized cystatin C or cystatin C and creatinine have been proposed. The better performance of these equations (especially the combined CKD-EPI equation) has been demonstrated. PMID:24711159

Delanaye, Pierre; Cavalier, Etienne; Cristol, Jean-Paul; Delanghe, Joris R



Reliability of estimated glomerular filtration rate in patients treated with platinum containing therapy.  


Estimates of glomerular filtration rate (eGFR) are widely used when administering nephrotoxic chemotherapy. No studies performed in oncology patients have shown whether eGFR can safely substitute a measured GFR (mGFR) based on a marker method. We aimed to assess the validity of four major formulas based on PCr (Cockcroft-Gault, MDRD, Wright and CKD-EPI) in comparison to mGFR in an oncology setting. Patients included had disseminated germ cell cancer and received conventional chemotherapy: bleomycin, etoposide and cisplatin. The mGFR of the patients was compared to all estimates with focus on bias (median percentage error), precision (median absolute percentage error) and accuracy (p10 and p30). The precision of carboplatin dosage based on eGFR was calculated. Data on mGFR, eGFR, and PCr were available in 390 patients, with a total of ? 1,600 measurements. Median PCr and mGFR synchronically decreased after chemotherapy, yielding high bias and low precision of most estimates. Post-chemotherapy, bias ranged from -0.2% (MDRD after four cycles) to 33.8% (CKD-EPI after five cycles+), precision ranged from 11.6% (MDRD after four cycles) to 33.8% (CKD-EPI after five cycles+) and accuracy (p30) ranged from 37.5% (CKD-EPI after five cycles+) to 86.9% (MDRD after four cycles). Although MDRD appeared acceptable after chemotherapy because of high accuracy, this equation underestimated GFR in all other measurements. Before and years after treatment, Cockcroft-Gault and Wright offered best results. Precision of carboplatin dosage was low. In conclusion, bias, precision and accuracy were unacceptable in all equations due to a synchronous decrease of PCr and mGFR during chemotherapy. PMID:24585507

Lauritsen, Jakob; Gundgaard, Maria G; Mortensen, Mette S; Oturai, Peter S; Feldt-Rasmussen, Bo; Daugaard, Gedske



Collaborative Systems Testing  

ERIC Educational Resources Information Center

Collaborative systems are widely used today in various activity fields. Their complexity is high and the development involves numerous resources and costs. Testing collaborative systems has a very important role for the systems' success. In this paper we present taxonomy of collaborative systems. The collaborative systems are classified in many…

Pocatilu, Paul; Ciurea, Cristian



Network Collaboration with UNIX.  

ERIC Educational Resources Information Center

Discusses networking as a collaboration tool in the teaching of technical writing. Argues that some degree of collaboration is innate to all writing, that word processing already facilitates that collaboration, and that networking is the next enhancement to the collaborative process. (RS)

Horn, Wm. Dennis



The Effect of Renal Dysfunction on Circulating Sclerostin Level in Patients with Type 2 Diabetes  

PubMed Central

Objective. Sclerostin is a Wnt inhibitor produced specifically by osteocytes. However, it is not currently clear whether renal dysfunction has an effect on circulating sclerostin level in patients with type 2 diabetes. The aim of the study was to evaluate this relationship. Design and Patients. We conducted a cross-sectional observational study of 302 type 2 diabetic patients with or without chronic kidney disease. Serum sclerostin level was analyzed by ELISA, and renal function was assessed by estimated glomerular filtration rate (eGFR) using chronic kidney disease epidemiology collaboration (CKD-EPI) equation. Results. There was a strong correlation between sclerostin level with renal function presented as serum creatinine (r = 0.745, P < 0.001) and eGFR (r = ?0.590, P < 0.001). Serum sclerostin level was significantly higher in patients with CKD-G3 stage than those with CKD-G1/2 stages after adjusting for age, sex, and BMI (P = 0.011). Patients with CKD-G4/5 stages had dramatically increased level of circulating sclerostin. Multiple regression analyses found that age, sex, and eGFR were independent determining factors for circulating sclerostin level. Conclusion. Our data showed that serum sclerostin levels start to increase in diabetic patients with CKD-G3 stage. Further studies are needed to establish the potential role of elevated sclerostin in diabetic patients with CKD. PMID:25053944

Kim, Se Hwa; Yoon, Soo Young; Lim, Sung-Kil; Rhee, Yumie



The effect of renal dysfunction on circulating sclerostin level in patients with type 2 diabetes.  


Objective. Sclerostin is a Wnt inhibitor produced specifically by osteocytes. However, it is not currently clear whether renal dysfunction has an effect on circulating sclerostin level in patients with type 2 diabetes. The aim of the study was to evaluate this relationship. Design and Patients. We conducted a cross-sectional observational study of 302 type 2 diabetic patients with or without chronic kidney disease. Serum sclerostin level was analyzed by ELISA, and renal function was assessed by estimated glomerular filtration rate (eGFR) using chronic kidney disease epidemiology collaboration (CKD-EPI) equation. Results. There was a strong correlation between sclerostin level with renal function presented as serum creatinine (r = 0.745, P < 0.001) and eGFR (r = -0.590, P < 0.001). Serum sclerostin level was significantly higher in patients with CKD-G3 stage than those with CKD-G1/2 stages after adjusting for age, sex, and BMI (P = 0.011). Patients with CKD-G4/5 stages had dramatically increased level of circulating sclerostin. Multiple regression analyses found that age, sex, and eGFR were independent determining factors for circulating sclerostin level. Conclusion. Our data showed that serum sclerostin levels start to increase in diabetic patients with CKD-G3 stage. Further studies are needed to establish the potential role of elevated sclerostin in diabetic patients with CKD. PMID:25053944

Kim, Se Hwa; Yoon, Soo Young; Lim, Sung-Kil; Rhee, Yumie



Regional Research Collaborations  

E-print Network

Regional Research Collaborations Merrill Series on The Research Mission of Public Universities at Birmingham Regional Neuroscience Research Collaboration: The Alabama Experience Panel 1: Research ........................................................................................................5 Vice Chancellor for Research, University of Kansas Medical Center Evolution of Reproductive



E-print Network

agreed upon by the advanced practice registered nurse and one or more licensed physicians or dentists Practice Registered Nurse, which have entered into collaborative practices (List all physicians below licensed specialty in space) within collaborative practice guidelines agreed upon by the collaborative


Linear Equations  

NSDL National Science Digital Library

This unit is a full lesson on linear equations with many problems for students and notes to teachers embedded. It begins with a question which illustrates the eight points students most often do not understand in order to answer it correctly. The unit is divided into ten sections: Characteristics of Linear Equations, Tables of Values for Graphing, Using Intercepts for Graphing, Using Slope-Intercept Form with Graphs, Families of Linear Equations, Graphing Linear vs. Non-Linear Equations, Creating, Graphing and Using Linear Equations, Simple System of Equations, What Went Wrong? (in which students observe how another student incorrectly answered a question), and Exploring with a Graphing Calculator. This is an excellent unit, used whole or in its parts, for students beginning with linear equations.

Czajkowski, Katrine



Doing Collaborative Learning (CL)  

NSDL National Science Digital Library

This website focuses on the practical aspects of collaborative learning in the classroom. The author explains how collaborative learning should be implemented, including course structure and objectives. Other topics include creating goals, incorporating student goals so they "buy into" this teaching style, evaluation issues, creating groups and the roles within the groups, the new roles the students and the instructor face, and some ideas on group dynamics. Also covered are enhanced lectures, several collaborative learning structures, and risks associated with implementing collaborative learning structures into the classroom.

Education, National I.; Research, Wisconsin C.


Some Aspects of Mathematical Model of Collaborative Learning  

ERIC Educational Resources Information Center

There are some mathematical learning models of collaborative learning, with which we can learn how students obtain knowledge and we expect to design effective education. We put together those models and classify into three categories; model by differential equations, so-called Ising spin and a stochastic process equation. Some of the models do not…

Nakamura, Yasuyuki; Yasutake, Koichi; Yamakawa, Osamu



Equation Dictionary  

NSDL National Science Digital Library

When equations are presented in class or in the context of textbook reading, students first evaluate whether the equation is appropriate for use in the dictionary (is it useful in many situations or specific to one problem? Is it a "final" version of an equation, or can it be simplified? Is it likely to be used in solving geophysical problems?) Once an equation is selected for the dictionary, students add a "definition" that includes (a) a short description of each variable and relevant constants, including appropriate units, (b) a written description of the process or relationships presented within the equation, and (c) any additional notes that help them understand the equation. The dictionary may be used on homework and exams, which encourages students to describe the equations in a manner that is meaningful to them. Thus, rather than simply write down the equation for seismic moment, a student might add "Seismic moment is a function of the size of the fault as well as the rigidity of the rock. The larger the fault or the displacement, the larger the earthquake". This activity allows students to evaluate their understanding of equations and the underlying physical processes. Addresses student fear of quantitative aspect and/or inadequate quantitative skills Addresses student misconceptions

Caplan-Auerbach, Jacqueline


Advances in Collaborative Evaluation  

ERIC Educational Resources Information Center

Collaborative evaluation is an approach that offers, among others, many advantages in terms of access to information, quality of information gathered, opportunities for creative problem-solving, and receptivity to findings. In the last decade, collaborative evaluation has grown in popularity along with similar participatory, empowerment, and…

Rodriguez-Campos, Liliana



Web based collaborative CAAD  

Microsoft Academic Search

this paper we introduce a new framework that implements a collaborative CAAD software architectureto regulate multiple graphical web clients interacting with multiple distributed computationservers. The key components of the system are: (a) geometric modeling services for CAAD, (b) ashared language interface, (c) a distribution layer for hierarchical object communication and standardJDBC interfaces to database system, (d) collaboration layer for multi-user

Chandrajit L. Bajaj; S. Cutchin; C. Morgia; Alberto Paoluzzi; Valerio Pascucci



School-Community Collaboration.  

ERIC Educational Resources Information Center

Collaborations between schools and parents, and schools and other institutions, seek to improve or expand available resources. This issue of "Focus in Change" focuses on two elementary schools with different models of collaboration in place. At Columbia Park Elementary School (Maryland) parents have been involved in site-based management teams…

Focus in Change, 1991



Creating Collaborative Advantage.  

ERIC Educational Resources Information Center

Although interorganizational collaboration is becoming increasingly significant as a means of achieving organizational objectives, it is not an easy process to implement. Drawing on the work of authors with extensive experience, an accessible introduction to the theory and practice of creating collaborative advantage is presented in this volume.…

Huxham, Chris, Ed.


Design for Collaboration  

ERIC Educational Resources Information Center

Online learning environments offer new opportunities for learning and over the last decade or so a variety of online learning environments have been developed by researchers to facilitate collaborative learning among students. In this paper we will present a case study of a successful collaborative learning design. This involves a near synchronous…

Blake, Canan; Scanlon, Eileen



Proficiency and Collaborative Learning  

ERIC Educational Resources Information Center

This study reports on the effect of different levels of proficiency on the students' achievements in collaborative learning instruction among 30 Persian-speaking EFL college students. Having been divided into dyads with different levels of proficiency, these subjects participated in nine sessions of collaborative instruction based on the…

Shokouhi, Hossein; Alishaei, Zahra



Collaborative Quest for Quality.  

ERIC Educational Resources Information Center

A collaborative effort between an elementary school (P.S.86) and Lehman College, both located in New York City, is described in this paper. The project was designed with the objective of avoiding the usual "top-down" process and instead concentrating on cooperative and collaborative planning. The participants included one college faculty member, a…

Washington, Valerie M.


Collaboration for Educational Change.  

ERIC Educational Resources Information Center

This paper comments on three aspects of the educational reform movement in America: the current reform movement's aims and goals, community collaborations to assist systemic reform, and problems in pedagogy associated with school reform. An important accomplishment of the movement included collaborative partnerships among the corporate community,…

Gordon, Richard K.


Collaborative Solutions for Natural  

E-print Network

management and collaborative leadership. For more information about NRLI contact: Bruce L. Delaney PO BoxCollaborative Solutions for Natural Resource Challenges NRLI PROJECT TEAM University of Florida of a trained network of professionals prepared to effectively address natural resources issues through conflict

Jawitz, James W.


Putting the collaborator back into collaborative filtering  

Microsoft Academic Search

Most of the published approaches to collaborative filtering and recommender systems concentrate on mathematical approaches for identifying user \\/ item preferences. This paper demonstrates that by considering the psychological decision making processes that are being undertaken by the users of the system it is possible to achieve a significant improvement in results. This approach is applied to the Netflix dataset

Gavin Potter



Chimpanzees Recruit the Best Collaborators  

Microsoft Academic Search

Humans collaborate with non-kin in special ways, but the evolutionary foundations of these collaborative skills remain unclear. We presented chimpanzees with collaboration problems in which they had to decide when to recruit a partner and which potential partner to recruit. In an initial study, individuals recruited a collaborator only when solving the problem required collaboration. In a second study, individuals

Alicia P. Melis; Brian Hare; Michael Tomasello



Linear Equations: One Step Equations  

NSDL National Science Digital Library

This video, best for introductory algebra students, demonstrates solving linear equations by working backwards, using inverse or opposite operations. The video uses several examples to demonstrate balancing equations to solve them. This is an excellent resource to help students understand how to solve linear equations by undoing operations and balancing. Flash player is required to view the video. Running time for the video is 4:59.

Wallace, Tyler



Interdisciplinarity, Innovation, Collaboration and Creativity  

E-print Network

Interdisciplinarity, Innovation, Collaboration and Creativity: How to Manage a Research Portfolio, Collaboration and Creativity or How to Manage a Research Portfolio ABSTRACT I will discuss four much abused words Interdisciplinarity, Innovation, Collaboration and Creativity. I will describe what they mean

Borwein, Jonathan


Distributed Augmented Reality for Collaborative  

E-print Network

Distributed Augmented Reality for Collaborative Design Applications Klaus H. Ahlers, Andr´e Kramer, Maastricht, NL, 1995) Distributed Augmented Reality for Collaborative Design Applications Klaus H. Ahlers a system for constructing collaborative design applications based on distributed augmented reality

Tuceryan, Mihran


Collaboration With the Pharmaceutical Industry  

NSDL National Science Digital Library

A powerpoint presentation file from the EB 2007 Careers Symposium - Guide for Successful Collaboration: From the Handshake to the Collaborative Research Agreement a presentation on the why, what, and how of industry collaborations.

PhD Stephen A Douglas (GlaxoSmithKline)



Collaboration With the Pharmaceutical Industry  

NSDL National Science Digital Library

A recorded presentation from the EB 2007 Careers Symposium - Guide for Successful Collaboration: From the Handshake to the Collaborative Research Agreement a presentation on the why, what, and how of industry collaborations.

PhD Stephen A Douglas (GlaxoSmithKline)



Experiences in collaborating with academia  

E-print Network

Collaborative Skills and Mindset · Analysis of Core Competencies for Alliance and collaboration management collaborative skills and competencies Positioning skills Organisational agility Innovation management Cross Cultural Skills - Managing Diversity - Cross cultural Sensitivity Conflict management - Conflict management


Melbourne Collaborative Cohort Study

The Melbourne Collaborative Cohort Study is a longitudinal study established in the 1990s by Cancer Council Victoria to investigate prospectively the role of diet and other lifestyle factors in cancer.


The LCOGT Science Collaboration  

NASA Astrophysics Data System (ADS)

Las Cumbres Observatory Global Telescope (LCOGT) has deployed a global network of 1-m and 2m optical telescopes, optimized for work in time-domain astronomy. Since our scientific staff is rather small, and since network operation necessarily involves close collaborations with other astronomical institutions, we aim to extend the scientific depth and scope of the Observatory by creating a formal Science Collaboration. This poster explains the structure and membership of the Collaboration, with emphasis on the notion of Key Projects that we intend as vehicles to perform scientific programs for which LCOGT's facilities are uniquely suited, and which will have the greatest scientific impact. The general subjects of these projects are already defined (Supernovae, Extrasolar Planets, Solar System, AGN, and Stellar Astrophysics). A Collaboration-wide proposal process to be carried out in early 2014 will determine which problems within these categories will be addressed in the first round of Key Projects.

Brown, Timothy M.; Boroson, T. A.; Howell, D. A.; Street, R.; Lister, T.



CUAHSI Unidata Collaboration Opportunities  

E-print Network

and Analysis Lake Powell Inflow and Storage #12;HIS Team and Collaborators · University of Texas at Austin ­ David Maidment (PI), Tim Whiteaker, James Seppi, Fernando Salas, Jingqi Dong, Harish Sangireddy · San


Equation Grapher  

NSDL National Science Digital Library

This interactive simulation investigates graphing linear and quadratic equations. Users are given the ability to define and change the coefficients and constants in order to observe resulting changes in the graph(s).

Colorado, Phet A.



Collaborative research networks work.  


Brazil was heralded for completion of the first genome sequence of a plant pathogen following the development of a virtual research center - a collaborative network of laboratories throughout the state of São Paulo, drawing on the expertise of a dispersed and diverse scientific community and on investment from both the government and the private sector. Strategies key to the success of this model are discussed here in the context of continuing collaborative scientific endeavors in both developed and developing countries. PMID:12925684

Camargo, Anamaria A; Simpson, Andrew J G



Estimation of renal function in patients with diabetes.  


Diabetes is the leading cause of chronic kidney disease (CKD), which makes estimation of renal function crucial. Serum creatinine is not an ideal marker of glomerular filtration rate (GFR), which also depends on digestive absorption, and the production of creatinine in muscle and its tubular secretion. Formulas have been devised to estimate GFR from serum creatinine but, given the wide range of GFR, proteinuria, body mass index and specific influence of glycaemia on GFR, the uncertainty of these estimations is a particular concern for patients with diabetes. The most popular recommended formulas are the simple Cockcroft-Gault equation, which is inaccurate and biased, as it calculates clearance of creatinine in proportion to body weight, and the MDRD equation, which is more accurate, but systematically underestimates normal and high GFR, being established by a statistical analysis of results from renal-insufficient patients. This underestimation explains why the MDRD equation is repeatedly found to give a poor estimation of GFR in patients with recently diagnosed diabetes and is a poor tool for reflecting GFR decline when started from normal, as well as the source of unexpected results when applied to epidemiological studies with a 60mL/min/1.73m(2) threshold as the definition of CKD. The more recent creatinine-based formula, the Mayo Clinic Quadratic (MCQ) equation, and the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) improve such underestimation, as both were derived from populations that included subjects with normal renal function. Determination of cystatin C is also promising, but needs standardisation. PMID:21680218

Rigalleau, V; Beauvieux, M-C; Gonzalez, C; Raffaitin, C; Lasseur, C; Combe, C; Chauveau, P; De la Faille, R; Rigothier, C; Barthe, N; Gin, H



Joint collaborative technology experiment  

NASA Astrophysics Data System (ADS)

Use of unmanned systems is rapidly growing within the military and civilian sectors in a variety of roles including reconnaissance, surveillance, explosive ordinance disposal (EOD), and force-protection and perimeter security. As utilization of these systems grows at an ever increasing rate, the need for unmanned systems teaming and inter-system collaboration becomes apparent. Collaboration provides a means of enhancing individual system capabilities through relevant data exchange that contributes to cooperative behaviors between systems and enables new capabilities not possible if the systems operate independently. A collaborative networked approach to development holds the promise of adding mission capability while simultaneously reducing the workload of system operators. The Joint Collaborative Technology Experiment (JCTE) joins individual technology development efforts within the Air Force, Navy, and Army to demonstrate the potential benefits of interoperable multiple system collaboration in a force-protection application. JCTE participants are the Air Force Research Laboratory, Materials and Manufacturing Directorate, Airbase Technologies Division, Force Protection Branch (AFRL/RXQF); the Army Aviation and Missile Research, Development, and Engineering Center Software Engineering Directorate (AMRDEC SED); and the Space and Naval Warfare Systems Center - Pacific (SSC Pacific) Unmanned Systems Branch operating with funding provided by the Joint Ground Robotics Enterprise (JGRE). This paper will describe the efforts to date in system development by the three partner organizations, development of collaborative behaviors and experimentation in the force-protection application, results and lessons learned at a technical demonstration, simulation results, and a path forward for future work.

Wills, Michael; Ciccimaro, Donny; Yee, See; Denewiler, Thomas; Stroumtsos, Nicholas; Messamore, John; Brown, Rodney; Skibba, Brian; Clapp, Daniel; Wit, Jeff; Shirts, Randy J.; Dion, Gary N.; Anselmo, Gary S.



Distance collaborations with industry  

SciTech Connect

The college industry relationship has been identified as a key policy issue in Engineering Education. Collaborations between academic institutions and the industrial sector have a long history and a bright future. For Engineering and Engineering Technology programs in particular, industry has played a crucial role in many areas including advisement, financial support, and practical training of both faculty and students. Among the most important and intimate interactions are collaborative projects and formal cooperative education arrangements. Most recently, such collaborations have taken on a new dimension, as advances in technology have made possible meaningful technical collaboration at a distance. There are several obvious technology areas that have contributed significantly to this trend. Foremost is the ubiquitous presence of the Internet. Perhaps almost as important are advances in computer based imaging. Because visual images offer a compelling user experience, it affords greater knowledge transfer efficiency than other modes of delivery. Furthermore, the quality of the image appears to have a strongly correlated effect on insight. A good visualization facility offers both a means for communication and a shared information space for the subjects, which are among the essential features of both peer collaboration and distance learning.

Peskin, A.; Swyler, K.



Collaborative Computational Intelligence in Economics  

Microsoft Academic Search

In this chapter, we review the use of the idea of collaborative computational intelligence in economics. We examine two kinds\\u000a of collaboration: first, the collaboration within the realm of computational intelligence, and, second, the collaboration\\u000a beyond the realm of it. These two forms of collaboration have had a significant impact upon the current state of economics.\\u000a First, they enhance and

Shu-Heng Chen


The collaboration imperative.  


Addressing global sustainability challenges--including climate change, resource depletion, and ecosystem loss--is beyond the individual capabilities of even the largest companies. To tackle these threats, and unleash new value, companies and other stakeholders must collaborate in new ways that treat fragile and complex ecosystems as a whole. In this article, the authors draw on cases including the Latin American Water Funds Partnership, the Sustainable Apparel Coalition (led by Nike, Patagonia, and Walmart), and Action to Accelerate Recycling (a partnership between Alcoa, consumer packaged goods companies, and local governments, among others) to describe four new collaboration models that create shared value and address environmental protection across the value stream. Optimal collaborations focus on improving either business processes or outcomes. They start with a small group of key organizations, bring in project management expertise, link self-interest to shared interest, encourage productive competition, create quick wins, and, above all, build and maintain trust. PMID:24830283

Nidumolu, Ram; Ellison, Jib; Whalen, John; Billman, Erin



Securing collaborative environments  

SciTech Connect

The diverse set of organizations and software components involved in a typical collaboratory make providing a seamless security solution difficult. In addition, the users need support for a broad range of frequency and locations for access to the collaboratory. A collaboratory security solution needs to be robust enough to ensure that valid participants are not denied access because of its failure. There are many tools that can be applied to the task of securing collaborative environments and these include public key infrastructure, secure sockets layer, Kerberos, virtual and real private networks, grid security infrastructure, and username/password. A combination of these mechanisms can provide effective secure collaboration capabilities. In this paper, we discuss the requirements of typical collaboratories and some proposals for applying various security mechanisms to collaborative environments.

Agarwal, Deborah; Jackson, Keith; Thompson, Mary



Male sex and vascular risk factors affect cystatin C-derived renal function in older people without diabetes or overt vascular disease  

PubMed Central

Background/objectives: to explore the effect of ageing on renal function with cystatin C as the marker of glomerular filtration rate (GFR) in the general population without vascular disease or diabetes. Design: a cross-sectional analysis of a healthy subset from the Good Aging in Skåne-cohort study representative of the Swedish general population. Subjects: 1252 participants without vascular disease and diabetes (43.9% men) of whom 203 were over 80 years old were included from the original cohort of 2931. Methods: plasma cystatin C and plasma creatinine were used as markers for GFR. Estimated GFR (eGFR) was calculated with three chronic kidney disease epidemiology collaboration (CKD-EPI) formulas involving cystatin C, creatinine or both. Results: the median for plasma cystatin C was 0.93 mg/l (60–69 years old), 1.04 (70–79 years old) and 1.24 (80+ years old). The difference in mg/l between the 5th and 95th percentile was 0.46, 0.62 and 0.90 for these age groups. Male sex increased the age effect on plasma cystatin C levels with 0.004 mg/l/year (P = 0.03), adjusted for vascular risk factors. Smoking, lower HDL and higher diastolic blood pressure were associated with higher cystatin C levels. 54.7% (CKD-EPI creatinine) to 73.9% (CKD-EPI cystatin C) of the 80+ had an eGFR < 60 ml/min/1.73 m2. Conclusion: non-diabetics without overt vascular disease exhibit an age related but heterogeneous decline in renal function. The ageing effect is more pronounced in men. At least half of healthy 80+ years old could be expected to have at least CKD Stage 3 with eGFR < 60 ml/min/1.73 m2. PMID:24321840

Werner, Karin Birgitta; Elmstahl, Solve; Christensson, Anders; Pihlsgard, Mats



Exploring Equations  

NSDL National Science Digital Library

This lesson from Illuminations has students study equivalence and systems of equations while identifying and using related functions. It includes an interactive applet that can be used in class. Discussion questions are also included to supplement the interactive material. The lesson is appropriate for grades 9-12 and should require one class period to complete.



Student Teaching as Collaboration  

NSDL National Science Digital Library

For teachers who are trying to understand what their students think and how they feel, data can include notes found on the floor after class, the letters they as teachers write to their students, and the e-mails they send each other as they puzzle out the problems of teaching and learning. Claire Bove and Matt Reider use all of these data sources as they try to understand and respond to students' interests, strengths, experiences, and needs. In this story of their collaboration efforts to support a classroom community in which cooperation, shared responsibility, and respect among students are built upon their own collaboration as teachers.

Bove, Claire; Reider, Matthew



Internet Performance Measurement Collaborators  

E-print Network

Internet Performance Measurement Collaborators Cross Industry Working Team (XIWT) High Performance of the timestamp mechanism in the ANS Surveyor Probe device FY98 · GITS Internet Performance Measurement Toolkit in Internet performance measurement through improved statistical analysis of the data that is collected


Online Collaboration: Curriculum Unbound!  

ERIC Educational Resources Information Center

Freed from the nuisances of paper-based methods, districts are making creative use of digital tools to move their curricular documents online, where educators can collaborate on course development and lesson planning. Back in 2003, Amarillo Independent School District (Texas) had begun using the Blackboard Content System to provide lessons online.…

Waters, John K.



Cultivating Labor Management Collaboration  

ERIC Educational Resources Information Center

In many districts, the notion of labor groups and district administration working together conjures descriptions of war and battle rather than cooperation and collaboration. However, in San Juan Unified School District, the headline, "Union and District Exhibit Positive Partnership" exemplifies the changing relationship between teacher leaders and…

Spector, Stacy



Learning Music from Collaboration  

ERIC Educational Resources Information Center

I draw on two traditions of research: the social psychology of collaborative groups, and the ethnographic study of improvisational performance. I outline a general model of group creativity derived from these traditions. I show how the model can be used to better understand musical competence and performance, and I provide recommendations for how…

Sawyer, R. Keith



Home Alone! Still Collaborating  

ERIC Educational Resources Information Center

When the authors taught in traditional classroom settings, collaboration and communication were understood to be important. Part of every class session was spent in discussion because they knew the importance of students teaching students, and they believed that the teacher as a facilitator, rather than the supreme encyclopedia of knowledge, was a…

Bell, Mary Ann; Kuon, Tricia



February 2005 31 Collaboration  

E-print Network

curriculum developers with motivated elementary teachers? ... An awesome learning collaboration that benefits to show the class their ideas and the drawings they create on presentation boards and to share their ideas during which the children make sense of their observations and collectively create ideas that describe

Colorado at Boulder, University of


Collaboration 101 Guidebook.  

ERIC Educational Resources Information Center

Head Start has a long history of providing comprehensive child and family development services to low-income children and families. Noting that this history can serve as a model as early childhood and care programs work toward greater collaboration with other programs and agencies to improve child well-being and help move families toward…

Illinois State Dept. of Human Services, East St. Louis. Head Start State Collaboration Office.


Community Development Collaborative Program  

E-print Network

of many community agencies. Threats to funding have led in some cases to what might be considered a "policing" approach to clients and communities. Meanwhile, corpo- rate ideas about management have gainedCommunity Development Collaborative Program SEMINAR The Dynamics

Sokolowski, Marla


Team Collaboration Software  

NASA Technical Reports Server (NTRS)

The Ground Resource Allocation and Planning Environment (GRAPE 1.0) is a Web-based, collaborative team environment based on the Microsoft SharePoint platform, which provides Deep Space Network (DSN) resource planners tools and services for sharing information and performing analysis.

Wang, Yeou-Fang; Schrock, Mitchell; Baldwin, John R.; Borden, Charles S.



Investigacin Supply chain collaboration  

E-print Network

Centro de Investigación Operativa I-2007-31 Supply chain collaboration Ana Meca and Judith Timmer Hernández de Elche Avda. de la Universidad s/n 03202 Elche (Alicante) #12;Chapter Number Supply Chain and increased competition among firms. Further, more and more products reach the customer through supply chains

Boucherie, Richard J.


Collaborative Learning, Circa 1880.  

ERIC Educational Resources Information Center

Collaborative learning, such as student-team learning or work-group learning, has become the focus of inservice workshops for teachers, a theme in professional journals, and the daily routine in an increasing number of classrooms. The women's study clubs in late 19th-century United States used a similar pedagogy. By the early 1900s, perhaps as…

Martin, Theodora Penny


A Call for Collaboration  

ERIC Educational Resources Information Center

In this digital world, being a "viewer" is passe. Web 2.0 tools--social networks, wikis, blogs, voicestream, YouTube, Google Docs--allow users to be participants. Instead of creating isolated users, such technologies foster community and collaboration. In this article, the author describes how schools in New York, Florida, New Jersey, and North…

Vogel, Carl



Innovation Through Collaboration  

E-print Network

. 3c. The organiza0on creates effec0ve learning environments. 3d. The organiza0 IUPUI Town Hall, March 19, 2012 #12;Innovation Through Collaboration: The organiza and supports effec,ve teaching. · Professional Development Services and Resources (e

Zhou, Yaoqi


Collaborative Lesson Plans.  

ERIC Educational Resources Information Center

This collection consists of 41 collaborative lesson plans developed by 99 Virginia teachers at 18 primarily High Schools that Work (HSTW) and tech prep sites. It is divided into three sections: career connection, community connection, and consumer connection. Two types of lesson descriptions which support HSTW key practices, and Virginia's Tech…

Henrico County Public Schools, Glen Allen, VA. Virginia Vocational Curriculum and Resource Center.


Collaborative Teaching: Teaching Strangers  

ERIC Educational Resources Information Center

One calls people on the street strangers if he or she doesn't know who they are, so students whom the librarian has never dealt with are just that, strangers. When the school librarian gets involved in collaboration, most of the time they don't see the student's Individualized Education Programs (IEPs), language barriers, or anything else that…

Panter, Michael E.



Using Collaborative Strategic Reading.  

ERIC Educational Resources Information Center

Describes collaborative strategic reading (CSR), a technique for teaching students, such as those with learning disabilities, reading comprehension and vocabulary skills in a cooperative setting. Covers teaching the four strategies of CSR (preview, click and clunk, get the gist, and wrap up), as well as teaching students cooperative learning group…

Klingner, Janette K.; Vaughn, Sharon



Learning Collaborative Information Filters  

Microsoft Academic Search

Predicting items a user would like on the basis of other users' ratings for these items has become a well-established strategy adopted by many recommendation services on the Internet. Although this can be seen as a classification problem, algo- rithms proposed thus far do not draw on results from the ma- chine learning literature. We propose a representation for collaborative

Daniel Billsus; Michael J. Pazzani



Learning assessment collaboration  

Microsoft Academic Search

This edition of ACER’s Higher Education Update charts advice and insights generated through recent work. The briefing explores R&D conducted to plan growth at the system level, looking at student growth projections, the supply of academics and student retention. It reviews new thinking about assessment collaborations and the measurement of interpersonal understanding. Student engagement and experience counts, and we showcase

Hamish Bennett Coates



A Failure to Collaborate  

ERIC Educational Resources Information Center

Based on a successful scholarly collaboration experience, the writer assigned a group project in a graduate seminar that confronted a wave of resentment. Small clusters of students were to tackle a multi-layered research assignment requiring textual decisions, bibliographic work, critical theory, historical research, and editorial design. As the…

Sanders, Martin



CONTEXT AWARE COLLABORATION IN ENTERPRISES Keywords: Context, Collaboration, Agents  

E-print Network

in improving the overall enterprise productivity. Contextual information plays a role in achievingCONTEXT AWARE COLLABORATION IN ENTERPRISES Keywords: Context, Collaboration, Agents Abstract, and cooperation mechanisms. Within an organization, the major challenges are how to shorten the product

Ramamritham, Krithi


Readiness for Collaboration Assessment Approach in Collaborative Networked Organisations  

Microsoft Academic Search

Collaboration is essential to develop successful Collaborative Networked Organizations (CNOs). In order to know if an organization\\u000a is ready and has the needed characteristics for collaborate and participate in a CNO, either a Virtual Breeding Environment\\u000a (VBE) or a Virtual Organization (VO), a set of specific elements should be evaluated. These evaluation elements are referred\\u000a as Readiness for Collaboration Assessments

David Romero; Nathalie Galeano; Arturo Molina


Serum cystatin C predicts vancomycin trough levels better than serum creatinine in hospitalized patients: a cohort study  

PubMed Central

Introduction Serum cystatin C can improve glomerular filtration rate (GFR) estimation over creatinine alone, but whether this translates into clinically relevant improvements in drug dosing is unclear. Methods This prospective cohort study enrolled adults receiving scheduled intravenous vancomycin while hospitalized at the Mayo Clinic in 2012. Vancomycin dosing was based on weight, serum creatinine with the Cockcroft-Gault equation, and clinical judgment. Cystatin C was later assayed from the stored serum used for the creatinine-based dosing. Vancomycin trough prediction models were developed by using factors available at therapy initiation. Residuals from each model were used to predict the proportion of patients who would have achieved the target trough with the model compared with that observed with usual care. Results Of 173 patients enrolled, only 35 (20%) had a trough vancomycin level within their target range (10 to 15 mg/L or 15 to 20 mg/L). Cystatin C-inclusive models better predicted vancomycin troughs than models based upon serum creatinine alone, although both were an improvement over usual care. The optimal model used estimated GFR by the Chronic Kidney Disease Epidemiology Collaborative (CKD-EPI) creatinine-cystatin C equation (R2?=?0.580). This model is expected to yield 54% (95% confidence interval 45% to 61%) target trough attainment (P <0.001 compared with the 20% with usual care). Conclusions Vancomycin dosing based on standard care with Cockcroft-Gault creatinine clearance yielded poor trough achievement. The developed dosing model with estimated GFR from CKD-EPIcreatinine-cystatin C could yield a 2.5-fold increase in target trough achievement compared with current clinical practice. Although this study is promising, prospective validation of this or similar cystatin C-inclusive dosing models is warranted. PMID:24887089



Training for Collaboration: Collaborative Practice Skills for Mental Health Professionals  

ERIC Educational Resources Information Center

The purpose of the study was to identify skills that mental health practitioners need for successful collaborative practice in medical settings. Known experts in the field of collaborative health care completed a survey designed to elicit their suggestions about what is needed for successful collaborative care practice. Through qualitative…

Bischoff, Richard J.; Springer, Paul R.; Reisbig, Allison M. J.; Lyons, Sheena; Likcani, Adriatik



Exploring How Collaborative Dialogues Facilitate Synchronous Collaborative Writing  

ERIC Educational Resources Information Center

Collaborative writing (CW) research has gained prevalence in recent years. However, the ways in which students interact socially to produce written texts through synchronous collaborative writing (SCW) is rarely studied. This study aims to investigate the effects of SCW on students' writing products and how collaborative dialogues facilitate…

Yeh, Hui-Chin



Who Collaborates Successfully? Prior Experience Reduces Collaboration Barriers in Distributed  

E-print Network

Who Collaborates Successfully? Prior Experience Reduces Collaboration Barriers in Distributed Interdisciplinary Research Jonathon N. Cummings Fuqua School of Management Duke University 1 Towerview Drive, Durham. The question we asked is, "Does prior experience with a collaborator reduce the barriers of distance

Kiesler, Sara


A University/Government Collaboration  

E-print Network

A University/Government Collaboration Family medicine Expansion Report 2013 School of Medicine #12 ........................................................................................................................... i Family Medicine Expansion Report A University / Government Collaboration ............................................1 Attracting More Medical Students into Choosing a Career in Family Medicine

Sankoff, David


Stage Models for Collaboration, Levels of Collaboration Survey and Collaboration Map; Measuring Collaboration Among Grant Partners - Team Science Toolkit

Collaboration is a prerequisite for the sustainability of interagency programs, particularly those programs initially created with the support of time-limited grant-funding sources. From the perspective of evaluators, however, assessing collaboration among grant partners is often difficult. It is also challenging to present collaboration data to stakeholders in a way that is meaningful. In this article, the authors introduce the Levels of Collaboration Scale, which was developed from existing models and instruments.


International Scientific Collaboration of China: Collaborating Countries, Institutions and Individuals  

E-print Network

Using bibliometric methods, we investigate China's international scientific collaboration from 3 levels of collaborating countries, institutions and individuals. We design a database in SQL Server, and make analysis of Chinese SCI papers based on the corresponding author field. We find that China's international scientific collaboration is focused on a handful of countries. Nearly 95% international co-authored papers are collaborated with only 20 countries, among which the USA account for more than 40% of all. Results also show that Chinese lineage in the international co-authorship is obvious, which means Chinese immigrant scientists are playing an important role in China's international scientific collaboration, especially in English-speaking countries.

Wang, Xianwen; Wang, Zhi; Peng, Lian; Wang, Chuanli



Collaborative international research.  


The current age of globalization poses challenges as to how to promote professional interaction to further international scholarly efforts in nursing. Models of global research are defined. Global health priorities are explicated, with recommendations for the conduct of outcomes-focused research leading to the generation of cost-effective interventions that contribute to the health and well-being of individuals, families, communities, and nations throughout the world. The challenges and opportunities in international collaborative nursing research are described based on the experiences of the authors during nearly two decades of collaborative work. International partnerships in globally relevant research, which respect and value equity between nurse researchers practicing in developed and developing countries, are essential. PMID:16479848

Callister, Lynn Clark; Getmanenko, Nataliya Ivanovna; Khalaf, Inaam; Garvrish, Nataliya; Semenic, Sonia; Vehvilainen-Julkunen, Katri; Turkina, Nataliya Victorovna



The organization of scientific collaborations  

Microsoft Academic Search

Based on empirical analysis of 53 multi-institutional collaborations in physics and allied sciences, we find that generalizations about the essentially informal and collective social organization of collaborative projects in science stem largely from a narrow analysis of high-energy particle physics experiments. Cluster analysis reveals that the variety of organizational formats of collaborative projects can be grouped into four types, ranging

Ivan Chompalov; Joel Genuth; Wesley Shrum




Microsoft Academic Search

Collaboration entails working together toward a common goal, but what is the common goal we want students to work toward in classes? What kinds of interactions and outcomes do we value as collaboration, and how do we facilitate them? This paper addresses these questions, beginning with an examination of research on groups, community, and shared cognition that inform collaboration, and

Caroline Haythornthwaite


Collaborative architecture design and evaluation  

Microsoft Academic Search

In this paper we describe a collaborative environment created to support distributed evaluation of a complex system architecture. The approach couples an interactive architecture browser with collaborative walkthroughs of an evolving architectural representation. The collaborative architecture browser was created to facilitate involvement of project stakeholders from geographically dispersed, heterogeneous organizations. The paper provides a rationale for the approach, describes the

Steven R. Haynes; Amie L. Skattebo; Jonathan A. Singel; Mark A. Cohen; Jodi L. Himelright



Teaching Collaboration to Education Majors  

ERIC Educational Resources Information Center

Schools need collaboration to keep teachers and students learning and for the implementation of new ideas. Community college students who strive to become teachers can learn to collaborate with colleagues. Through a review of literature, this paper presents a variety of purposes, definitions, types and methods of collaboration. A practical guide…

Schneider, Florence J.




E-print Network

i GUIDE FOR APPLICANTS NMP COLLABORATIVE PROJECT FP7-NMP-2010-EU-USA Further copies of this Guide-site: #12;NMP Guide for Applicants: Collaborative projects FP7-NMP-2010-EU-USA i documents. #12;NMP Guide for Applicants: Collaborative projects FP7-NMP-2010-EU-USA ii Contents 1. GETTING

Milano-Bicocca, Università



E-print Network

i GUIDE FOR APPLICANTS NMP COLLABORATIVE PROJECT FP7-NMP-2010-EU-Mexico Further copies the following web-site: #12;NMP Guide for Applicants: Collaborative projects FP7-NMP documents. #12;NMP Guide for Applicants: Collaborative projects FP7-NMP-2010-EU-Mexico ii Contents 1

Milano-Bicocca, Università


DISSERTATION Distributed Collaborative Augmented Reality  

E-print Network

DISSERTATION Distributed Collaborative Augmented Reality ausgeführt zum Zwecke der Erlangung des COLLABORATIVE AUGMENTED REALITY - 2 - Abstract Augmented Reality is the mixture of computer graphics and text with real world and/or video images. This thesis presents improvements for collaborative augmented reality


Collaborative and Coordinated Product Configuration  

E-print Network

Collaborative and Coordinated Product Configuration Marcilio Mendonca1 , Toacy Oliveira2 , Donald. This process is error-prone and risky as requirements may lead to conflicting decisions at configuration time collaborative nature. In our research, we advocate that product configuration is enhanced by a collaborative

Waterloo, University of


Collaborative document production using quilt  

Microsoft Academic Search

Quilt is a computer-based tool for collaborative document production. It provides annotation, messaging, computer conferencing, and notification facilities to support communication and information sharing among the collaborators on a document. Views of a document tailored to individual collaborators or to other of the document's users are provided by Quilt based on the user's position in a permission hierarchy that reflects

Mary Diane Palmer Leland; Robert S. Fish; Robert E. Kraut



Advances in Collaborative Filtering  

Microsoft Academic Search

\\u000a The collaborative filtering (CF) approach to recommenders has recently enjoyed much interest and progress. The fact that it\\u000a played a central role within the recently completed Netflix competition has contributed to its popularity. This chapter surveys\\u000a the recent progress in the field. Matrix factorization techniques, which became a first choice for implementing CF, are described\\u000a together with recent innovations. We

Yehuda Koren; Robert M. Bell



CLTV: Collaborative learning television  

Microsoft Academic Search

There is evidence that, contrary to popular assumption, television viewing and learning involve a high degree of social interaction.\\u000a If so, then performance-motivated programing in educational television militates against learning. Collaborative learning\\u000a television would promote learning by taking advantage of the social nature of watching television and the social nature of\\u000a learning. Viewers would be organized into semiautonomous learning groups

Kenneth A. Bruffee



High Prevalence of Signs of Renal Damage Despite Normal Renal Function in a Cohort of HIV-Infected Patients: Evaluation of Associated Factors.  


Abstract Renal disorders are an emerging problem in HIV-infected patients. We performed a cross-sectional study of the first 1000 HIV-infected patients attended at our HIV unit who agreed to participate. We determined the frequency of renal alterations and its related risk factors. Summary statistics and logistic regression were applied. The study sample comprised 970 patients with complete data. Most were white (94%) and men (76%). Median (IQR) age was 48 (42-53) years. Hypertension was diagnosed in 19%, dyslipidemia in 27%, and diabetes mellitus in 3%. According to the Chronic Kidney Disease Epidemiology Collaboration (CKD EPI) equation, 29 patients (3%) had an eGFR<60?ml/min/1.73?m(2); 18 of them (62%) presented altered albumin/creatinine and protein/creatinine (UPC or UAC) ratios. Of the patients with eGFR>60?mL/min, it was present in 293 (30%), 38 of whom (7.1%) had UPC>300?mg/g. Increased risk of renal abnormalities was correlated with hypertension (OR, 1.821 [95%CI, 1.292;2.564]; p=0.001), age (OR, 1.015 [95%CI, 1.001;1.030], per one year; p=0.040), and use of tenofovir disoproxil fumarate (TDF) plus protease inhibitor (PI), (OR, 1.401 [95%CI, 1.078;1.821]; p=0.012). Current CD4 cell count was a protective factor (OR, 0.9995 [95%CI, 0.9991;0.9999], per one cell; p=0.035). A considerable proportion of patients presented altered UPC or UAC ratios, despite having an eGFR>60?mL/min. CD4 cell count was a protective factor; age, hypertension, and use of TDF plus PIs were risk factors for renal abnormalities. Based on our results, screen of renal abnormalities should be considered in all HIV-infected patients to detect these alterations early. PMID:25238104

Bonjoch, Anna; Juega, Javier; Puig, Jordi; Pérez-Alvarez, Nuria; Aiestarán, Aintzane; Echeverría, Patricia; Pérez, Vanessa; Clotet, Bonaventura; Romero, Ramon; Bonet, Josep; Negredo, Eugenia



Glomerular Filtration Rate and Proteinuria: Association with Mortality and Renal Progression in a Prospective Cohort of a Community-Based Elderly Population  

PubMed Central

Limited prospective data are available on the importance of estimated glomerular filtration rate (GFR) and proteinuria in the prediction of all-cause mortality (ACM) in community-based elderly populations. We examined the relationship between GFR or proteinuria and ACM in 949 randomly selected community-dwelling elderly subjects (aged ?65 years) over a 5-year period. A spot urine sample was used to measure proteinuria by the dipstick test, and GFR was estimated using the chronic kidney disease-epidemiology collaboration (CKD-EPI) equation. Information about mortality and causes of death was collected by direct enquiry with the subjects and from the national mortality data. Compared to subjects without proteinuria, those with proteinuria of grade ?1+ had a 1.725-fold (1.134–2.625) higher risk of ACM. Compared to subjects with GFR ?90 ml/min/1.73 m2, those with GFR<45 ml/min/1.73 m2 had a 2.357 -fold (1.170–4.750) higher risk for ACM. Among the 403 subjects included in the analysis of renal progression, the annual rate of GFR change during follow-up period was ?0.52±2.35 ml/min/1.73 m2/year. The renal progression rate was 7.315-fold (1.841–29.071) higher in subjects with GFR<60 ml/min/1.73 m2 than in those with GFR ?60 ml/min/1.73 m2. Among a community-dwelling elderly Korean population, decreased GFR of <45 ml/min/1.73 m2 and proteinuria were independent risk factors for ACM. PMID:24709896

Oh, Se Won; Kim, Sejoong; Na, Ki Young; Kim, Ki Woong; Chae, Dong-Wan; Chin, Ho Jun



Triglyceride Levels Are Closely Associated with Mild Declines in Estimated Glomerular Filtration Rates in Middle-Aged and Elderly Chinese with Normal Serum Lipid Levels  

PubMed Central

Objective To investigate the relationship between lipid profiles [including total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C) and high-density lipoprotein cholesterol (HDL-C)] and a mild decline in the estimated glomerular filtration rate (eGFR) in subjects with normal serum lipid levels. Design and Methods In this study, we included 2647 participants who were ?40 years old and had normal serum lipid levels. The Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation was used to estimate the GFR. A mildly reduced eGFR was defined as 60–90 mL/min/1.73 m2. First, multiple linear regression analysis was used to estimate the association of lipid profiles with the eGFR. Then, the levels of each lipid component were divided into four groups, using the 25th, 50th and 75th percentiles as cut-off points. Finally, multiple logistic regression analysis was used to investigate the association of different lipid components with the risk of mildly reduced eGFR. Results In the group with a mildly reduced eGFR, TG and LDL-C levels were significantly increased, but HDL-C levels were significantly decreased. After adjusting for age, gender, body mass index (BMI), systolic blood pressure (SBP), glycated hemoglobin (HbA1c), smoking and drinking, only TC and TG were independently related to the eGFR. Additionally, only TG showed a linear relationship with an increased risk of a mildly reduced eGFR, with the highest quartile group (TG: 108–150 mg/dl [1.22–1.70 mmol/L]) having a significantly increased risk after adjusting for the above factors. Conclusions Triglyceride levels are closely associated with a mildly reduced eGFR in subjects with normal serum lipid levels. Dyslipidemia with lower TG levels could be used as new diagnostic criteria for subjects with mildly reduced renal function. PMID:25275610

Zhang, Xiuping; Zhao, Xiangmin; Wang, Yulian; Li, Chengqiao; Li, Mei; Wang, Shaoyuan; Yang, Weifang; Ma, Zeqiang; Ma, Aixia; Zheng, Huizhen; Wu, Jiahui; Sun, Yu; Song, Jun; Lin, Peng; Liang, Kai; Gong, Lei; Wang, Meijian; Liu, Fuqiang; Li, Wenjuan; Xiao, Juan; Yan, Fei; Yang, Junpeng; Wang, Lingshu; Tian, Meng; Liu, Jidong; Zhao, Ruxing; Chen, Shihong; Chen, Li



State Technologies Advancement Collaborative  

SciTech Connect

The U. S. Department of Energy (DOE), National Association of State Energy Officials (NASEO), and Association of State Energy Research and Technology Transfer Institutions (ASERTTI) signed an intergovernmental agreement on November 14, 2002, that allowed states and territories and the Federal Government to better collaborate on energy research, development, demonstration and deployment (RDD&D) projects. The agreement established the State Technologies Advancement Collaborative (STAC) which allowed the states and DOE to move RDD&D forward using an innovative competitive project selection and funding process. A cooperative agreement between DOE and NASEO served as the contracting instrument for this innovative federal-state partnership obligating funds from DOE's Office of Energy Efficiency and Renewable Energy and Office of Fossil Energy to plan, fund, and implement RDD&D projects that were consistent with the common priorities of the states and DOE. DOE's Golden Field Office provided Federal oversight and guidance for the STAC cooperative agreement. The STAC program was built on the foundation of prior Federal-State efforts to collaborate on and engage in joint planning for RDD&D. Although STAC builds on existing, successful programs, it is important to note that it was not intended to replace other successful joint DOE/State initiatives such as the State Energy Program or EERE Special Projects. Overall the STAC process was used to fund, through three competitive solicitations, 35 successful multi-state research, development, deployment, and demonstration projects with an overall average non-federal cost share of 43%. Twenty-two states were awarded at least one prime contract, and organizations in all 50 states and some territories were involved as subcontractors in at least one STAC project. Projects were funded in seven program areas: (1) Building Technologies, (2) Industrial Technologies, (3) Transportation Technologies, (4) Distributed Energy Resources, (5) Hydrogen Technology Learning Centers, (6) Fossil Energy, and (7) Rebuild America.

David S. Terry



The Efficient Windows Collaborative  

SciTech Connect

The Efficient Windows Collaborative (EWC) is a coalition of manufacturers, component suppliers, government agencies, research institutions, and others who partner to expand the market for energy efficient window products. Funded through a cooperative agreement with the U.S. Department of Energy, the EWC provides education, communication and outreach in order to transform the residential window market to 70% energy efficient products by 2005. Implementation of the EWC is managed by the Alliance to Save Energy, with support from the University of Minnesota and Lawrence Berkeley National Laboratory.

Petermann, Nils



Collaborative Hypertext of Radiology  

NSDL National Science Digital Library

The Medical College of WisconsinâÂÂs Collaborative Hypertext of Radiology (CHORUS) website contains over one thousand documents and images related to anatomy and physiology, radiological findings, diagnostics, and diseases. The site links headings and reference information with images, providing access to case study images in a variety of formats. Not only are the documents and images helpful reference sources, but they are also great tool for those looking to practice their diagnostic skills. This is a valuable tool for students studying the basics of radiology and related fields.



Advances in Collaborative Filtering  

NASA Astrophysics Data System (ADS)

The collaborative filtering (CF) approach to recommenders has recently enjoyed much interest and progress. The fact that it played a central role within the recently completed Netflix competition has contributed to its popularity. This chapter surveys the recent progress in the field. Matrix factorization techniques, which became a first choice for implementing CF, are described together with recent innovations. We also describe several extensions that bring competitive accuracy into neighborhood methods, which used to dominate the field. The chapter demonstrates how to utilize temporal models and implicit feedback to extend models accuracy. In passing, we include detailed descriptions of some the central methods developed for tackling the challenge of the Netflix Prize competition.

Koren, Yehuda; Bell, Robert


Collaborative editing within the pervasive collaborative computing environment  

SciTech Connect

Scientific collaborations are established for a wide variety of tasks for which several communication modes are necessary, including messaging, file-sharing, and collaborative editing. In this position paper, we describe our work on the Pervasive Collaborative Computing Environment (PCCE) which aims to facilitate scientific collaboration within widely distributed environments. The PCCE provides a persistent space in which collaborators can locate each other, exchange messages synchronously and asynchronously and archive conversations. Our current interest is in exploring research and development of shared editing systems with the goal of integrating this technology into the PCCE. We hope to inspire discussion of technology solutions for an integrated approach to synchronous and asynchronous communication and collaborative editing.

Perry, Marcia; Agarwal, Deb



A Collaboration Readiness Assessment Approach  

Microsoft Academic Search

Collaboration readiness depends on “hard” factors such as competency fitness or technological preparedness, but also on several\\u000a other factors of a “soft” nature such as organization's character, willingness to collaborate, or affectivity \\/ empathy relationships.\\u000a A modeling approach to assess how prepared is an enterprise to join a collaborative network is proposed. The approach is based\\u000a on a notion of

João Rosas; Luis M. Camarinha-Matos


Collaboration Supported Automatic Examination Architecture  

Microsoft Academic Search

During the past few years, automatic computer examination systems have been widely used for computer-based tests. But these systems are based on the traditional question-answer examination style which is limited for the collaborative examination. The collaborative examination needs multiple examinees and can be parallel performed. The collaborative examination also should consider the context of the examinee, e.g. the order of

Song Luo; Jianbin Hu; Zhong Chen



Measuring and Estimating GFR and Treatment Effect in ADPKD Patients: Results and Implications of a Longitudinal Cohort Study  

PubMed Central

Trials failed to demonstrate protective effects of investigational treatments on glomerular filtration rate (GFR) reduction in Autosomal Dominant Polycystic Kidney Disease (ADPKD). To assess whether above findings were explained by unreliable GFR estimates, in this academic study we compared GFR values centrally measured by iohexol plasma clearance with corresponding values estimated by Chronic Kidney Disease Epidemiology Collaboration (CKD-Epi) and abbreviated Modification of Diet in Renal Disease (aMDRD) formulas in ADPKD patients retrieved from four clinical trials run by a Clinical Research Center and five Nephrology Units in Italy. Measured baseline GFRs and one-year GFR changes averaged 78.6±26.7 and 8.4±10.3 mL/min/1.73 m2 in 111 and 71 ADPKD patients, respectively. CKD-Epi significantly overestimated and aMDRD underestimated baseline GFRs. Less than half estimates deviated by <10% from measured values. One-year estimated GFR changes did not detect measured changes. Both formulas underestimated GFR changes by 50%. Less than 9% of estimates deviated <10% from measured changes. Extent of deviations even exceeded that of measured one-year GFR changes. In ADPKD, prediction formulas unreliably estimate actual GFR values and fail to detect their changes over time. Direct kidney function measurements by appropriate techniques are needed to adequately evaluate treatment effects in clinics and research. PMID:22393413

Cannata, Antonio; Carrara, Fabiola; Cella, Claudia; Ferrari, Silvia; Stucchi, Nadia; Prandini, Silvia; Ene-Iordache, Bogdan; Diadei, Olimpia; Perico, Norberto; Ondei, Patrizia; Pisani, Antonio; Buongiorno, Erasmo; Messa, Piergiorgio; Dugo, Mauro; Remuzzi, Giuseppe



National Girls Collaborative Project  

NSDL National Science Digital Library

The goal of the National Girls Collaborative Project (NGCP) "is to bring together organizations throughout the United States that are committed to informing and encouraging girls to pursue careers in science, technology, engineering, and mathematics (STEM)." The Project started as a regional organization in the Pacific Northwest in 2002, and the National Science Foundation funded the creation of the national group in 2004. Visitors interested in reading about how the NGCP has positively impacted STEM education for girls and women, should definitely read the NGCP Evaluation Summary PDF in the "Project Evaluation" link under the "About" tab. Visitors can find an archive of the NGCP e-newsletter dating back to 2006 under the "Resources" tab. There are also more than a dozen webcast videos that share effective strategies from around the nation, for working with girls in STEM. The "Stories" link provides encouraging success stories of regional groups that work with girls in STEM areas.


Collaborative Commerce: The Role of Intermediaries in e-Collaboration  

Microsoft Academic Search

We propose a model for implementing collaborative commerce in which independent companies form temporary alliances by combining their capabilities and capacity to meet market needs. Lessons from a case study of one of the earliest tests of agile collaboration among small firms, the Agile Web, Inc. guides implementation. The study illustrates that small firm owners may not have the expertise,

Susan A. Sherer; Bill Adams



Collaborative Resource Allocation  

NASA Technical Reports Server (NTRS)

Collaborative Resource Allocation Networking Environment (CRANE) Version 0.5 is a prototype created to prove the newest concept of using a distributed environment to schedule Deep Space Network (DSN) antenna times in a collaborative fashion. This program is for all space-flight and terrestrial science project users and DSN schedulers to perform scheduling activities and conflict resolution, both synchronously and asynchronously. Project schedulers can, for the first time, participate directly in scheduling their tracking times into the official DSN schedule, and negotiate directly with other projects in an integrated scheduling system. A master schedule covers long-range, mid-range, near-real-time, and real-time scheduling time frames all in one, rather than the current method of separate functions that are supported by different processes and tools. CRANE also provides private workspaces (both dynamic and static), data sharing, scenario management, user control, rapid messaging (based on Java Message Service), data/time synchronization, workflow management, notification (including emails), conflict checking, and a linkage to a schedule generation engine. The data structure with corresponding database design combines object trees with multiple associated mortal instances and relational database to provide unprecedented traceability and simplify the existing DSN XML schedule representation. These technologies are used to provide traceability, schedule negotiation, conflict resolution, and load forecasting from real-time operations to long-range loading analysis up to 20 years in the future. CRANE includes a database, a stored procedure layer, an agent-based middle tier, a Web service wrapper, a Windows Integrated Analysis Environment (IAE), a Java application, and a Web page interface.

Wang, Yeou-Fang; Wax, Allan; Lam, Raymond; Baldwin, John; Borden, Chester



Collaborative Beamfocusing Radio (COBRA)  

NASA Astrophysics Data System (ADS)

A Ziva team has recently demonstrated a novel technique called Collaborative Beamfocusing Radios (COBRA) which enables an ad-hoc collection of distributed commercial off-the-shelf software defined radios to coherently align and beamform to a remote radio. COBRA promises to operate even in high multipath and non-line-of-sight environments as well as mobile applications without resorting to computationally expensive closed loop techniques that are currently unable to operate with significant movement. COBRA exploits two key technologies to achieve coherent beamforming. The first is Time Reversal (TR) which compensates for multipath and automatically discovers the optimal spatio-temporal matched filter to enable peak signal gains (up to 20 dB) and diffraction-limited focusing at the intended receiver in NLOS and severe multipath environments. The second is time-aligned buffering which enables TR to synchronize distributed transmitters into a collaborative array. This time alignment algorithm avoids causality violations through the use of reciprocal buffering. Preserving spatio-temporal reciprocity through the TR capture and retransmission process achieves coherent alignment across multiple radios at ~GHz carriers using only standard quartz-oscillators. COBRA has been demonstrated in the lab, aligning two off-the-shelf software defined radios over-the-air to an accuracy of better than 2 degrees of carrier alignment at 450 MHz. The COBRA algorithms are lightweight, with computation in 5 ms on a smartphone class microprocessor. COBRA also has low start-up latency, achieving high accuracy from a cold-start in 30 ms. The COBRA technique opens up a large number of new capabilities in communications, and electronic warfare including selective spatial jamming, geolocation and anti-geolocation.

Rode, Jeremy P.; Hsu, Mark J.; Smith, David; Husain, Anis



Collaborative Writing: Online versus Frontal  

ERIC Educational Resources Information Center

Students in higher education, most frequently, use the frontal approach while being asked to collaborate on a writing assignment. However, the difficulty in collaborative writing using conventional technologies such as pen and paper, board or computer is the limited ability to view the work of your peers during the process (Baeker, Glass,…

Passig, David; Schwartz, Gali



Recency-based collaborative filtering  

Microsoft Academic Search

Collaborative flltering is regarded as one of the most promising recommendation algorithms. Traditional approaches for collaborative flltering do not take con- cept drift into account. For example, user purchase interests may be volatile. A new mother may be in- terested in baby toys, although previously she had no interest in these. A man may like romantic fllms while he preferred

Yi Ding; Xue Li; Maria E. Orlowska



Crowdsourced sensing & collaboration using Twitter  

E-print Network

Crowdsourced sensing & collaboration using Twitter Murat Demirbas SUNY Buffalo Monday, November 22 goal We provide a crowdsourced sensing and collaboration service using Twitter to enable aggregation and sharing of data as well as tasking of other cellphones Monday, November 22, 2010 #12;Why Twitter? Open

Demirbas, Murat


Collaborative video editing for Wikipedia  

Microsoft Academic Search

Collaborative video for Wikipedia faces several challenges from social and community adoption to technology limitations. This presentation explores how each of these problems are being addressed. The presentation focuses on building a collaborative educational video community and how the html5 technology platform has evolved to better support rich media applications such as HTML5 video editing in the browser and standardization

Michael Dale



Leadership in online creative collaboration  

Microsoft Academic Search

Leadership plays a central role in the success of many forms of online creative collaboration, yet little is known about the challenges leaders must manage. In this paper, we report on a qualitative study of leadership in three online communities whose members collaborate over the Internet to create computer-animated movies called \\

Kurt Luther; Amy Bruckman




E-print Network

GUIDE FOR APPLICANTS NMP COLLABORATIVE PROJECT Two-stage submission process FP7-NMP-2010-LARGE-4 be downloaded from the following web-site: #12;NMP Guide for Applicants: Collaborative projects FP7-NMP-2010-LARGE-4 ii About this Guide This is version number 4 of the FP7 Guide for Applicants

Milano-Bicocca, Università



E-print Network

GUIDE FOR APPLICANTS NMP COLLABORATIVE PROJECT Two-stage submission process FP7-NMP-2010-SME-4 be downloaded from the following web-site: #12;NMP Guide for Applicants: Collaborative projects FP7-NMP-2009-SME-4 ii About this Guide This is version number 4 of the FP7 Guide for Applicants

Milano-Bicocca, Università



E-print Network

GUIDE FOR APPLICANTS NMP COLLABORATIVE PROJECT Two-stage submission process FP7-NMP-2010-SMALL-4 be downloaded from the following web-site: #12;NMP Guide for Applicants: Collaborative projects FP7-NMP-2010-SMALL-4 ii About this Guide This is version number 4 of the FP7 Guide for Applicants

Milano-Bicocca, Università


A Model of Transformative Collaboration  

ERIC Educational Resources Information Center

Two collaborative writing partners sought to deepen their understanding of transformative learning by conducting several spirals of grounded theory research on their own collaborative relationship. Drawing from adult education, business, and social science literature and including descriptive analysis of their records of activity and interaction…

Swartz, Ann L.; Triscari, Jacqlyn S.



Collaborative Relationships in Evaluation Consulting  

ERIC Educational Resources Information Center

People are often driven to become "independent" as part of the desire to go out on their own. Independent evaluation consultants, however, frequently collaborate with others on evaluation projects. This chapter explores such collaborative relationships from both sides: those leading evaluations with subcontracted consultants and those who work as…

Maack, Stephen C.; Upton, Jan



Collaborative Research and Teacher Education  

ERIC Educational Resources Information Center

In this article, the author explores how collaborative teacher research can reposition teachers to be powerful stakeholders and policymakers rather than skilled technicians and implementers. She begins with a brief review of the historical antecedents to collaborative teacher research in order to detail how teachers and their allies have fought…

Christianakis, Mary



Illinois: Child Care Collaboration Program  

ERIC Educational Resources Information Center

The Illinois Child Care Collaboration Program promotes collaboration between child care and other early care and education providers, including Early Head Start (EHS), by creating policies to ease blending of funds to extend the day or year of existing services. While no funding is provided through the initiative, participating programs may take…

Center for Law and Social Policy, Inc. (CLASP), 2012



English Language Learner Engineering Collaborative  

ERIC Educational Resources Information Center

In an effort to develop an engineering design project that would deliver the necessary content and reach out to the English Language Learner (ELL) community, faculty in the Engineering Academy at Springdale High School in Springdale, Arkansas instituted the ELL Engineering Collaborative. The ELL Engineering Collaborative has four primary goals…

Pendergraft, Katy; Daugherty, Michael K.; Rossetti, Charles



Collaboration: Staying on the Bandwagon.  

ERIC Educational Resources Information Center

Collaboration is a complex issue that is crucial in education and teacher education. This paper examines factors important in collaboration (interactive exchange of resources, decision making, problem solving, conflict management, interpersonal communication, cultural influences, and systemic influences) and discusses benefits of and barriers to…

Welch, Marshall



The Limits of Collaborative Evaluation.  

ERIC Educational Resources Information Center

Describes the development of a collaborative evaluation model and its application to a curricular innovation project within a secondary school system in Hong Kong. Focuses on the limits of collaboration in long-term evaluation projects with multiple stakeholders. (Author/VWL)

Lewkowicz, Jo A.; Nunan, David



Solving Single Step Equations  

NSDL National Science Digital Library

This is to practice and review single step equations. Have fun. Complete the following two sites. Follow the directions given for each site. One-Step Equations Add/Subtract One-Step Equations Mult/Division When you have finished the sites above, enter equation buster and work through level one. Equation buster ...

Reddish, Ms.



Equating Error in Observed-Score Equating  

ERIC Educational Resources Information Center

Traditionally, error in equating observed scores on two versions of a test is defined as the difference between the transformations that equate the quantiles of their distributions in the sample and population of test takers. But it is argued that if the goal of equating is to adjust the scores of test takers on one version of the test to make…

van der Linden, Wim J.



An emerging view of scientific collaboration: Scientists' perspectives on collaboration and factors that impact collaboration  

Microsoft Academic Search

Collaboration is often a critical aspect of scientific re- search, which is dominated by complex problems, rap- idly changing technology, dynamic growth of knowl- edge, and highly specialized areas of expertise. An indi- vidual scientist can seldom provide all of the expertise and resources necessary to address complex research problems. This paper describes collaboration among a group of scientists, and

Noriko Hara; Paul Solomon; Seung-lye Kim; Diane H. Sonnenwald



Collaborations in Underground Laboratories  

NASA Astrophysics Data System (ADS)

There are programs between underground physics labs into other studies. The Gran Sasso with large halls and dedicated tunnels in Italy and the Canfranc with newly completed space in Spain have geodynamic experiments (A. Bettini communication, 2011). The Low Noise Underground Lab (LSBB of Rustrel-pays d'Apt) converted a former French missiles launching command center to house a SQUID shielded electromagnetically above 10 Hz for global ionosphere and earthquake observations (G. Waysand et al. 2010). The China JingPing Lab has new physics room and tunnels excavated under 2.5 km overburden with rock mechanic changes evaluated (X. Feng, 2011). These are examples associated with tunnels through mountain ranges. In North America, we have Canada's SNO in an active mine with new space and the U.S. effort for reentry into the abandoned Homestake mine levels for physics and bio-geo-engineering studies. We also have underground research labs dedicated to nuclear waste research in Sweden, Switzerland, France, Germany, and candidate sites in Japan and China. All these underground labs are engaging in international collaborations to develop inter-disciplinary studies. The linkage/networking with International Physics is pursued.

Wang, Joseph S. Y.



Adaptation in collaborative governance regimes.  


Adaptation and the adaptive capacity of human and environmental systems have been of central concern to natural and social science scholars, many of whom characterize and promote the need for collaborative cross-boundary systems that are seen as flexible and adaptive by definition. Researchers who study collaborative governance systems in the public administration, planning and policy literature have paid less attention to adaptive capacity specifically and institutional adaptation in general. This paper bridges the two literatures and finds four common dimensions of capacity, including structural arrangements, leadership, knowledge and learning, and resources. In this paper, we focus on institutional adaptation in the context of collaborative governance regimes and try to clarify and distinguish collaborative capacity from adaptive capacity and their contributions to adaptive action. We posit further that collaborative capacities generate associated adaptive capacities thereby enabling institutional adaptation within collaborative governance regimes. We develop these distinctions and linkages between collaborative and adaptive capacities with the help of an illustrative case study in watershed management within the National Estuary Program. PMID:25073764

Emerson, Kirk; Gerlak, Andrea K



Adaptation in Collaborative Governance Regimes  

NASA Astrophysics Data System (ADS)

Adaptation and the adaptive capacity of human and environmental systems have been of central concern to natural and social science scholars, many of whom characterize and promote the need for collaborative cross-boundary systems that are seen as flexible and adaptive by definition. Researchers who study collaborative governance systems in the public administration, planning and policy literature have paid less attention to adaptive capacity specifically and institutional adaptation in general. This paper bridges the two literatures and finds four common dimensions of capacity, including structural arrangements, leadership, knowledge and learning, and resources. In this paper, we focus on institutional adaptation in the context of collaborative governance regimes and try to clarify and distinguish collaborative capacity from adaptive capacity and their contributions to adaptive action. We posit further that collaborative capacities generate associated adaptive capacities thereby enabling institutional adaptation within collaborative governance regimes. We develop these distinctions and linkages between collaborative and adaptive capacities with the help of an illustrative case study in watershed management within the National Estuary Program.

Emerson, Kirk; Gerlak, Andrea K.



Basic lubrication equations  

NASA Technical Reports Server (NTRS)

Lubricants, usually Newtonian fluids, are assumed to experience laminar flow. The basic equations used to describe the flow are the Navier-Stokes equation of motion. The study of hydrodynamic lubrication is, from a mathematical standpoint, the application of a reduced form of these Navier-Stokes equations in association with the continuity equation. The Reynolds equation can also be derived from first principles, provided of course that the same basic assumptions are adopted in each case. Both methods are used in deriving the Reynolds equation, and the assumptions inherent in reducing the Navier-Stokes equations are specified. Because the Reynolds equation contains viscosity and density terms and these properties depend on temperature and pressure, it is often necessary to couple the Reynolds with energy equation. The lubricant properties and the energy equation are presented. Film thickness, a parameter of the Reynolds equation, is a function of the elastic behavior of the bearing surface. The governing elasticity equation is therefore presented.

Hamrock, B. J.; Dowson, D.



Structuring Dimensions for Collaborative Systems PEDRO ANTUNES  

E-print Network

: Collaborative Systems Evaluation, Human-Computer Interaction, Interaction Assessment, Evaluation DimensionsStructuring Dimensions for Collaborative Systems Evaluation PEDRO ANTUNES University of Lisbon ________________________________________________________________________ Collaborative systems evaluation is always necessary to determine the impact a solution will have

Antunes, Pedro


Early Detection of Collaboration Conflicts and Risks  

E-print Network

Early Detection of Collaboration Conflicts and Risks Yuriy Brun, Member, IEEE, Reid Holmes, Michael developers identify, manage, and prevent conflicts. Crystal uses speculative analysis to make concrete advice unobtrusively available to developers. Index Terms--Collaborative development, collaboration conflicts

Ernst, Michael


Collaborative Requirements Elicitation with Visualization Techniques  

E-print Network

Collaborative Requirements Elicitation with Visualization Techniques Diogo Duarte Instituto which makes collaboration crucial for the success of this activity, especially in global software development projects with distributed teams and stakeholders. Despite the need for collaboration, lack of user

da Silva, Alberto Rodrigues


Asynchronous Online Collaboration as a Flexible Learning Activity and an Authentic Assessment Method in an Undergraduate Mathematics Course  

ERIC Educational Resources Information Center

Online collaboration exercises were used as part of a diverse assessment package for an undergraduate differential equations course. Online collaboration served as a highly effective method for promoting and assessing generic graduate capabilities such as writing in a context-relevant manner and the development of self-awareness with regard to…

Mallet, Dann G.



Interdisciplinary Educational Collaborations: Chemistry and Computer Science  

ERIC Educational Resources Information Center

Research collaborations between chemists and other scientists resulted in significant outcomes such as development of software. Such collaboration provided a realistic learning experience for computer science students.

Haines, Ronald S.; Woo, Daniel T.; Hudson, Benjamin T.; Mori, Joji C.; Ngan, Evey S. M.; Pak, Wing-Yee



Musicpainter : a collaborative composing environment  

E-print Network

This thesis presents the design and implementation of Musicpainter, a networked graphical composing environment that encourages sharing and collaboration within the composing process. Instead of building a computer-assisted ...

Li, Wu-Hsi



Collaborative Writing for Young Adults.  

ERIC Educational Resources Information Center

Presents a dialogue between the authors on what it is like to collaborate in writing young adult fiction. Discusses their writing processes, how they come up with ideas for their books, and how they get the books published. (RS)

Hadley, Lee; Irwin, Annabelle



Collaborative Inquiry for Adult Learning.  

ERIC Educational Resources Information Center

Collaborative inquiry is an effective strategy for facilitating experiential learning through the use of peer participation, multiple ways of knowing, and systematic validity processes for meaning making. (Contains 21 references.) (SK)

Kasl, Elizabeth; Yorks, Lyle



Collaborative Authoring of Walden's Paths  

E-print Network

The World Wide Web contains rich collections of digital materials that can be used in education and learning settings. The collaborative authoring prototype of Walden's Paths targets two groups of users: educators and learners. From the perspective...

Li, Yuanling




EPA Science Inventory

The goal of this task is to improve our understanding of atmospheric modeling research applications through collaborations with the international air pollution community and to demonstrate the applicability of our AQ models for their utility through technical applications by clie...


Doing Collaborative Learning (CL)- Groups  

NSDL National Science Digital Library

This site features a guide to all the benefits and challenges encountered when guiding groups through the process of collaborative learning. Included are tips for promoting positive interaction, creating a good group dynamic, and forming successful groups.

Research, Wisconsin C.; Wisconsin-Madison, University O.


Adaptive Support for Distributed Collaboration  

Microsoft Academic Search

Through interaction with others, a person develops multiple perspectives that become the basis for innovation and the construction\\u000a of new knowledge. This chapter discusses the challenges facing emerging web-based technologies that enable distributed users\\u000a to discover and construct new knowledge collaboratively. Examples include advanced collaborative and social information filtering\\u000a technology that not only helps users discover knowledge, peers, and relevant

Amy Soller



Are you a collaborative leader?  


Social media and technologies have put connectivity on steroids and made collaboration more integral to business than ever. But without the right leadership, collaboration can go astray. Employees who try to collaborate on everything may wind up stuck in endless meetings, struggling to reach agreement. On the other side of the coin, executives who came of age during the heyday of "command and control" management can have trouble adjusting their style to fit the new realities. In their research on top-performing CEOs, Insead professors Ibarra and Hansen have examined what it takes to be a collaborative leader. They've found that it requires connecting people and ideas outside an organization to those inside it, leveraging diverse talent, modeling collaborative behavior at the top, and showing a strong hand to keep teams from getting mired in debate. In this article, they describe tactics that executives from Akamai, GE, Reckitt Benckiser, and other firms use in those four areas and how they foster high-performance collaborative cultures in their organizations. PMID:21800471

Ibarra, Herminia; Hansen, Morten T



Achieving integrative, collaborative ecosystem management.  


Although numerous principles have been identified as being important for successfully integrating social and ecological factors in collaborative management, few authors have illustrated how these principles are used and why they are effective. On the basis of a review of the ecosystem management and collaboration literature, we identified eight factors important for integrative, collaborative ecosystem management-integrated and balanced goals, inclusive public involvement, stakeholder influence, consensus group approach, collaborative stewardship, monitoring and adaptive management, multidisciplinary data, and economic incentives.We examined four cases of successful ecosystem management to illustrate how the factors were incorporated and discuss the role they played in each case's success. The cases illustrate that balancing social and ecosystem sustainability goals is possible. Collaborative efforts resulted in part from factors aimed at making plans economically feasible and from meaningful stakeholder participation in ongoing management. It also required participation in monitoring programs to ensure stakeholder interests were protected and management efforts were focused on agreed-upon goals. Data collection efforts were not all-inclusive and systematic; rather, they addressed the ecological, economic, and social aspects of key issues as they emerged over time. Economic considerations appear to be broader than simply providing economic incentives; stakeholders seem willing to trade some economic value for recreational or environmental benefits. The cases demonstrate that it is not idealistic to believe integrative, collaborative ecosystem management is possible in field applications. PMID:17002755

Keough, Heather L; Blahna, Dale J



Validation of Metrics for Collaborative Systems  

Microsoft Academic Search

This paper describe the new concepts of collaborative systems metrics validation. The paper define the quality characteristics of collaborative systems. There are proposed a metric to estimate the quality level of collaborative systems. There are performed measurements of collaborative systems quality using a specially designed software.

Cristian CIUREA; Ion IVAN



Collaborative Alliances: Moving from Practice to Theory  

Microsoft Academic Search

The Journal of Applied Behavioral Science presents two special issues on collaborative alliances that examine the contributions and limits of existing theories for explaining collaboration, and that clarify and expand our understanding of this phenomenon. In this introduction, the following major theoretical perspectives are applied to explain collaboration and collaborative alliances: resource dependence theory; corporate social performance\\/institutional economics theory; strategic

Barbara Gray; Donna J. Wood



Supporting Distance Learners for Collaborative Problem Solving.  

ERIC Educational Resources Information Center

This paper describes a computer-supported environment designed to facilitate distance learning through collaborative problem-solving. The goal is to encourage distance learning students to work together, in order to promote both learning of collaboration and learning through collaboration. Collaboration is defined as working together on a common…

Verdejo, M. F.; Barros, B.; Abad, M. T.


Collaboration for Diverse Learners: Viewpoints and Practices.  

ERIC Educational Resources Information Center

This book suggests that a solution to schools' lack of comprehensive literacy programs may be found through innovations in collaborative decision making about curriculum and instruction. It provides analyses of collaborative efforts, multiple ways to think about collaboration and its implementation, and examples of collaborative projects. After an…

Risko, Victoria J., Ed.; Bromley, Karen, Ed.



E-print Network

, and the analysis and assessment of group collaboration. Introduction Collaborative learning is a kind of socialAPPLICATIONS OF A COLLABORATIVE LEARNING ONTOLOGY Barros, B., Verdejo, M.F., Read, T. (1 the collaborative learning elements present in real practical environments, create an integrated ontology

Mizoguchi, Riichiro


Assessment of (Computer-Supported) Collaborative Learning  

ERIC Educational Resources Information Center

Within the (Computer-Supported) Collaborative Learning (CS)CL research community, there has been an extensive dialogue on theories and perspectives on learning from collaboration, approaches to scaffold (script) the collaborative process, and most recently research methodology. In contrast, the issue of assessment of collaborative learning has…

Strijbos, J. -W.



Baldrige Collaborative Let's Work on Your Challenges!  

E-print Network

Baldrige Collaborative Assessment Let's Work on Your Challenges! Baldrige Performance Excellence Program · Why Consider a Baldrige Collaborative Assessment A Baldrige Collaborative conducting self-assessments, the Baldrige Collaborative Assessment offers the opportunity to get an outside

Magee, Joseph W.


Collaboration in Distance Education. International Case Studies.  

ERIC Educational Resources Information Center

This book contains nine case studies of collaboration in distance education. The case studies focus on such aspects of collaboration in distance education as the following: roles of individual institutional partners; importance of personal relationships; benefits of collaboration to individual partners; conflicts between collaboration and…

Moran, Louise, Ed.; Mugridge, Ian, Ed.


Semantic interoperability in tools for intercultural collaboration  

Microsoft Academic Search

In software\\/content development in intercultural environments, collaboration among participants and effective administration are crucial for overall successful projects. Various tools are used to achieve the collaboration and the administration of the project: no single groupware is sufficient for both collaboration support and management. Therefore, interoperability among various tools employed in one project is essential for efficient collaboration. To establish semantic

Kaname Funakoshi; Kaori Sugiyamat; Toru Ishida; Takashi Yoshinot; Jun Munemori; Haijun ZhangS; Zhongzhi Shif



California Commissioning Collaborative: 2007 Program Plan  

E-print Network

California Commissioning Collaborative: 2007 Program Plan Presented by: Jim Parks, Chair CCC Board of Directors November 1, 2007 © California Commissioning Collaborative © California Commissioning Collaborative Mission and Organization • Improve... and RCx as a strategy for meeting efficiency goals • CCC projects provide support and resources © California Commissioning Collaborative 2007 Program Plan • Support for Retrocommissioning Programs – Verification of Savings • Retrocommissioning Market...

Parks, J.



The HotQCD Equation of State  

SciTech Connect

We present results from recent calculations of the QCD equation of state by the HotQCD Collaboration and review the implications for hydrodynamic modeling. The equation of state of QCD at zero baryon density was calculated on a lattice of dimensions 32{sup 3} x 8 with m{sub l} = 0.1 m{sub s} (corresponding to a pion mass of {approx}220 MeV) using two improved staggered fermion actions, p4 and asqtad. Calculations were performed along lines of constant physics using more than 100M cpu-hours on BG/L supercomputers at LLNL, NYBlue, and SDSC. We present parameterizations of the equation of state suitable for input into hydrodynamics models of heavy ion collisions.

Soltz, R A



A Single Good Mind: Collaboration, Cooperation, and the Writing Self.  

ERIC Educational Resources Information Center

Uses multiple typefaces to express multiple voices that call into question the conventional wisdom about collaboration and collaborative writing. Presents vignettes. Discusses "indefinite definitions," multivalent texts/ambivalent authors, collaboration and community, collaboration and identity, and collaboration qua textuality. (RS)

Yancey, Kathleen Blake; Spooner, Michael



IDEAS - Benefits of Creative Collaboration  

NASA Astrophysics Data System (ADS)

A key goal for the Initiative to Develop Education through Astronomy and Space Science (IDEAS) Grant Program is to enhance science education through astronomy and space science via creative collaboration between professional astronomers/space scientists and professional educators/informal science educators. Creative collaboration not only refers to the partnership formed by the team members of proposed programs team but also to the wider community of audiences and venues. There are many possible untapped audiences and/or communities that could be targeted with an astronomy/space science program. There are also dissemination possibilities, including publication in professional education journals, instruction and display, that could amplify the affect a program has on a broader community. The poster will provide examples of previous creative collaborations as well as information on the next proposal cycle.

Eisenhamer, B.



Heartland AEA's Technology Infusion Collaborative  

NSDL National Science Digital Library

For this TIC presentation, Cappie will share various integrated technologies that aid visual art instruction, foster engagement and encourage collaboration and community. Some of the shared online resources will include social platforms, interactive posters and website use. Connections to the Visual Arts in the Iowa Core website will also be showcased. Technology Integration Matrix is a framework for ?defining and evaluating? whether use is active, collaborative, constructive, authentic and goal-directed. Technology Integration Matrix Art Educators of Iowa's Visual Arts in the Iowa Core website guides educators ...

Dobyns, Ms.



GeoCollaborative: Crisis Management  

NSDL National Science Digital Library

The GeoCollaborative brings together researchers interested in finding ways to develop information science and technology to support crisis management. Managing crisis events, such as hurricanes, forest fires, disease outbreaks, chemical spills, and terrorist attacks, involves gathering "geospatial information about the event itself, its causes, the people and infrastructure affected, resources available to respond, and more." The research team addresses "two fundamental problems that impede effective coordinated work with geospatial information." Working from a cognitive systems engineering approach, the group is developing geospatial information and technologies to address these challenges. The website provides an overview of GeoCollaborative's approach and a few selected publications.


Improving Virtual Team Collaboration Outcomes through Collaboration Process Structuring  

ERIC Educational Resources Information Center

The ability to collaborate in a virtual team is a necessary skill set for today's knowledge workers and students to be effective in their work. Past research indicates that knowledge workers and students need to establish a formal process to perform work, develop clear goals and objectives, and facilitate better communication among team members.…

Dittman, Dawn R.; Hawkes, Mark; Deokar, Amit V.; Sarnikar, Surendra



Single wall penetration equations  

NASA Technical Reports Server (NTRS)

Five single plate penetration equations are compared for accuracy and effectiveness. These five equations are two well-known equations (Fish-Summers and Schmidt-Holsapple), two equations developed by the Apollo project (Rockwell and Johnson Space Center (JSC), and one recently revised from JSC (Cour-Palais). They were derived from test results, with velocities ranging up to 8 km/s. Microsoft Excel software was used to construct a spreadsheet to calculate the diameters and masses of projectiles for various velocities, varying the material properties of both projectile and target for the five single plate penetration equations. The results were plotted on diameter versus velocity graphs for ballistic and spallation limits using Cricket Graph software, for velocities ranging from 2 to 15 km/s defined for the orbital debris. First, these equations were compared to each other, then each equation was compared with various aluminum projectile densities. Finally, these equations were compared with test results performed at JSC for the Marshall Space Flight Center. These equations predict a wide variety of projectile diameters at a given velocity. Thus, it is very difficult to choose the 'right' prediction equation. The thickness of a single plate could have a large variation by choosing a different penetration equation. Even though all five equations are empirically developed with various materials, especially for aluminum alloys, one cannot be confident in the shield design with the predictions obtained by the penetration equations without verifying by tests.

Hayashida, K. B.; Robinson, J. H.



Solving Systems of Equations  

NSDL National Science Digital Library

Learn how to solve systems of linear equations by graphing, substitution, and elimination. As we discovered in our Pet Sitters Unit, systems of equations are a useful way to model and solve real-world situations in business. They are also useful in science and social science applications. This online unit will help you become an expert at solving systems of linear equations. 1) ...

Ball, Mrs.



Time fractional Schrödinger equation  

Microsoft Academic Search

The Schrödinger equation is considered with the first order time derivative changed to a Caputo fractional derivative, the time fractional Schrödinger equation. The resulting Hamiltonian is found to be non-Hermitian and nonlocal in time. The resulting wave functions are thus not invariant under time reversal. The time fractional Schrödinger equation is solved for a free particle and for a potential

Mark Naber



Fractional Schrödinger equation  

Microsoft Academic Search

Some properties of the fractional Schrödinger equation are studied. We prove the Hermiticity of the fractional Hamilton operator and establish the parity conservation law for fractional quantum mechanics. As physical applications of the fractional Schrödinger equation we find the energy spectra of a hydrogenlike atom (fractional ``Bohr atom'') and of a fractional oscillator in the semiclassical approximation. An equation for

Nick Laskin



Communication in Collaborative Discovery Learning  

ERIC Educational Resources Information Center

Background: Constructivist approaches to learning focus on learning environments in which students have the opportunity to construct knowledge themselves, and negotiate this knowledge with others. "Discovery learning" and "collaborative learning" are examples of learning contexts that cater for knowledge construction processes. We introduce a…

Saab, Nadira; van Joolingen, Wouter R.; van Hout-Wolters, Bernadette H. A. M.



Network-Based Collaborative Education.  

ERIC Educational Resources Information Center

Discusses telematics and the use of computer networks to support collaborative education, both among teachers for training and planning and among students in their learning process. Highlights include traditional class groups and groups using computer-mediated communication; teachers' roles; learning circles for teachers; online teacher training;…

Trentin, Guglielmo



Collaborative Websites Supporting Open Authoring  

E-print Network

College of Computing Georgia Institute of Technology Atlanta, GA 30332-0280 404-894-5618 Submission to Journal of the Learning Sciences #12;2 Collaborative Websites Supporting Open Authoring user can edit any existing page or creating new pages. Using the CoWeb, both teachers and students have

Guzdial, Mark


Actor Interdependence in Collaborative Telelearning.  

ERIC Educational Resources Information Center

This paper presents a model of collaborative telelearning and describes how coordination theory has provided a framework for the analysis of actor (inter)dependencies in this scenario. The model is intended to inform the instructional design of learning scenarios, the technological design of the telelearning environment, and the design of…

Wasson, Barbara; Bourdeau, Jacqueline


Collaborative Test Reviews: Student Performance  

ERIC Educational Resources Information Center

A group study method proved helpful in improving senior-level students' performance on unit tests through collaborative learning. Students of a History of Textiles course voluntarily attended study sessions to review course content and prepare for unit tests. The students who attended the group reviews scored better on tests than those who did…

Bhatia, Anuradha; Makela, Carole J.



Flex Your Classroom's Collaborative Muscles.  

ERIC Educational Resources Information Center

Describes the use of Zebu, a software tool accessed via a standard Web browser that is designed for constructing online collaborative-learning projects, with seventh-grade students. Discusses learning outcomes, student motivation, peer assessment and feedback, and class projects in poetry, social studies, and science. (LRW)

Jackson, Bonnie



PROJECT SUMMARY Collaborative Mathematics Environments  

E-print Network

communication protocols will be based on a typed formal language which provides the semantics for collaboration to provide formal and semi­formal semantic standards for communications and linkage on the proposed Math, using, for instance, string­to­string communication. They do not have a common semantic base that would

Keinan, Alon


Language models of collaborative filtering  

Microsoft Academic Search

Collaborative filtering is a major technique to make person- alized recommendations about information items (movies, books, web- pages etc) to individual users. In the literature, a common research ob- jective is to predict unknown ratings of items for a user, on the condition that the user has explicitly rated a certain amount of items. Neverthe- less, in many practical situations,

Jun Wang



Collaborative Stage Manual Part II

SEER Program Coding and Staging Manual 2004, Revision 1 Appendix C Site-Specific Coding Modules C-299 Collaborative Staging Codes Nasal Cavity C30.0 C30.0 Nasal cavity (excludes nose, NOS C76.0) Note: Laterality must be coded for this site,


Nonreaders Anonymous: Reading History Collaboratively.  

ERIC Educational Resources Information Center

Addresses the issue of teaching students in the U.S. history survey course to read historical works by shifting the focus from the lecture method to collaborative learning techniques. Describes various techniques that can be used in the classroom such as expert groups, Particulars into Generalizations (PIG), and making lists and evaluative…

Marcus, Robert D.



Managing the Collaborative Learning Environment.  

ERIC Educational Resources Information Center

The feature story in this issue, "Managing the Collaborative Learning Environment," focuses on the growing emphasis on teamwork in the workplace. It discusses how the concept of empowering employees in the workplace is evolving and the benefits--faster decision making, lower costs and absenteeism, higher productivity and quality, and increased…

Wagner, June G.



Collaboration in Iranian Scientific Publications  

Microsoft Academic Search

This study looks at international collaboration in Iranian scientific publications through the ISI Science Citation Index® (SCI) for the years 1995-1999, inclusive. These results are compared to and contrasted with the earlier findings for the periods covering 1985-1994 (Osareh & Wilson 2000). The results of Iran's increasing productivity over a 15-year pe- riod are presented. Iran doubled its output in

Farideh Osareh; Concepción S. Wilson



Mystery Boxes: Uncertainty and Collaboration  

NSDL National Science Digital Library

This lesson teaches students that scientific knowledge is fundamentally uncertain. Students manipulate sealed mystery boxes and attempt to determine the inner structure of the boxes which contain a moving ball and a fixed barrier or two. The nature and sources of uncertainty inherent in the process of problem-solving are experienced. The uncertainty of the conclusions is reduced by student collaboration.

Beard, Jean


Trans-world haptic collaboration  

Microsoft Academic Search

This sketch describes a collaborative virtual environment application involving haptic interaction over long Internet distances. We have developed algorithms to accommodate significant latency for certain applications, notably in the medical domain. The results have shown that we can manipulate simulated human body organs, as well as guide each other's 'hands' (and shake hands!) over 22,000 km.

Chris Gunn; Matthew A. Hutchins; Matt Adcock; Rhys Hawkins



A Formula for Achieving Collaboration  

ERIC Educational Resources Information Center

The school library media center has an abundance of resources for teachers and students, but library media specialists are frequently isolated, sometimes invisible, members of the faculty. In addition, many teachers mistakenly think of library media specialists as "the copyright police" or "The Controllers of Content" instead of collaborators. It…

Hickel, Dorian



Collaboration Recoil Polarisation Observables in  

E-print Network

Glazier, D. Watts University of Edinburgh and the Crystal Ball at MAMI collaboration #12;Beam chambers, PID scintillator barrel) s TAPS 384 BaF2 detectors Forward 21 degrees Crystal Ball 672 Na bremsstrahlung photons up to 1.4GeV Glasgow Tagger Target inside ball #12;OGL section of Crystal BAll, PID

Edinburgh, University of


TESLA Superconducting Linear TESLA Collaboration  

E-print Network

Chapter 3 TESLA Superconducting Linear Collider TESLA Collaboration 275 #12;276 CHAPTER 3. TESLA LINEAR COLLIDER24-Oct-9615:40:35I-DEASMasterSeries3:Design Database:/home/sass/ideas_work/ideas_linac/TESLA of Technology, Dep. of Mathematics, Otakaari 1, SF-02150 Espoo: E. Somersalo IHEP, 142284 Protvino, Moscow


Indigenous Continuance: Collaboration and Syncretism  

ERIC Educational Resources Information Center

In this keynote address, the author talks about Indigenous peoples who are presently in a dynamic circumstance of constant change that they are facing courageously with creative collaboration and syncretism. In the address, the author speaks "of" an Indigenous consciousness and he speaks "with" an Indigenous consciousness so that Indigenous…

Ortiz, Simon J.



Drama: An Interdisciplinary, Collaborative Exercise.  

ERIC Educational Resources Information Center

Teaching drama gave one instructor a chance to renew herself, and drama became an important part of a personal teaching renaissance. An elective class for grade 12 entitled "Humanities and the Arts" offered opportunity for collaborative teaching with colleagues in their areas of expertise. In a class on "Modern Drama" designed for honors students,…

Tomas, Linda


Collaboration: It Really Does Work!  

ERIC Educational Resources Information Center

Collaboration between classroom teachers and library media specialists will help overcome problems of increasing workload faced by teachers, students and parents in the aftermath of the No Child Left Behind program. One such experiment resulted in transforming a tedious assignment into an exciting and memorable project.

Youssef, Jennifer L.



Proactive detection of collaboration conflicts  

Microsoft Academic Search

Collaborative development can be hampered when conflicts arise because developers have inconsistent copies of a shared project. We present an approach to help developers identify and resolve conflicts early, before those conflicts become severe and before relevant changes fade away in the developers' memories. This paper presents three results. First, a study of open-source systems establishes that conflicts are frequent,

Yuriy Brun; Reid Holmes; Michael D. Ernst; David Notkin



Computer-mediated collaborative learning  

Microsoft Academic Search

The study reported here investigates collaborative learning at the computer. Ten pairs of students were presented with a series of comprehension questions about Mary Shelley's novel Frankenstein or a Modern Prometheus along with a CD-ROM, Frankenstein Illuminated, containing the novel and a variety of source material. Five students worked with an interface based on a behaviorist model of instruction and

Ken Beatty; David Nunan



Computer-Mediated Collaborative Learning  

ERIC Educational Resources Information Center

The study reported here investigates collaborative learning at the computer. Ten pairs of students were presented with a series of comprehension questions about Mary Shelley's novel "Frankenstein or a Modern Prometheus" along with a CD-ROM, "Frankenstein Illuminated," containing the novel and a variety of source material. Five students worked with…

Beatty, Ken; Nunan, David



A Comparison of IRT Equating and Beta 4 Equating  

ERIC Educational Resources Information Center

Four equating methods (3PL true score equating, 3PL observed score equating, beta 4 true score equating, and beta 4 observed score equating) were compared using four equating criteria: first-order equity (FOE), second-order equity (SOE), conditional-mean-squared-error (CMSE) difference, and the equi-percentile equating property. True score…

Kim, Dong-In; Brennan, Robert; Kolen, Michael



Tutorial on Balancing Equations  

NSDL National Science Digital Library

Dr. Yue-Ling Wong of the Wake Forest University Computer Science Department maintains the online Tutorial on Balancing Equations. Students interactively get to choose the types of atoms in a methane, ethane, propane, and ethanol equation; enter the atom counts for the equation and the product; and then attempt to balance the equation. The program tells you if you are right or wrong and gives the right answers whenever you request them. Twelve other more advance chemical equations are available as well, making the site more than just a Web programming example. In all, it's a good learning tool for introductory chemistry students.

Wong, Yue-Ling.



Learning to Collaborate by Collaborating: A Face-to-Face Collaborative Activity for Measuring and Learning Basics about Teamwork  

ERIC Educational Resources Information Center

In today's fast-changing business environment, teams have emerged as a requirement for business success. However, in schools and universities, students are usually not taught teamwork skills. In this paper, we introduce learning to collaborate by collaborating, a process that enables collaboration and teamwork skills to be taught and measured…

Cortez, C.; Nussbaum, M.; Woywood, G.; Aravena, R.



Enhancing distributed collaboration using sociometric feedback  

E-print Network

Distributed collaboration is often more challenging than co-located collaboration as many of the social signals become lost in computer-mediated communication. I propose a system that improves the performance of distributed ...

Kim, Taemie Jung



Lessons for Collaboration between Educational Agencies.  

ERIC Educational Resources Information Center

School-university collaboration occurs only as a result of deliberate effort. Using trade between Nepal and Tibet as an illustration, elements of a successful collaboration are discussed, and examples are presented from Florida's Teacher Education Centers. (MT)

Wu, P. C.



Web-based collaborative design environment  

E-print Network

This thesis explores the collaborative design process facing the challenge of the new era of information technology. Architecture design is often a tremendous collaboration process participated by multi-professions. ...

Ning, Hai, 1974-



Improved Neighborhood-based Collaborative Filtering  

Microsoft Academic Search

Recommender systems based on collaborative filtering predi ct user preferences for products or services by learning past user- item re- lationships. A predominant approach to collaborative filte ring is neighborhood based (\\

Robert M. Bell; Yehuda Koren



Discourse models for collaboratively edited corpora  

E-print Network

This thesis focuses on computational discourse models for collaboratively edited corpora. Due to the exponential growth rate and significant stylistic and content variations of collaboratively edited corpora, models based ...

Chen, Erdong, S.M. Massachusetts Institute of Technology




EPA Science Inventory

The NIMH Treatment of Depression Collaborative Research Program (TDCRP) was a collaborative agreement between NIMH (Mood, Anxiety and Personality Disorder Research Branch) and three research sites, George Washington University, University of Oklahoma and the University of Pittsbu...


Specification of Secure Distributed Collaboration Systems  

Microsoft Academic Search

The focus of this paper is on a specification model for defining security and coordination policies for distributed collaboration and workflow systems. This work is motivated by the objective to build distributed collaboration systems from their high level specifications. We identify here unique requirements for secure collaboration, specifically role ad- mission and activation constraints, separation of duties, dy- namic access

Anand R. Tripathi; Tanvir Ahmed; Richa Kumar




Microsoft Academic Search

As government devolves its responsibilities, service providers are competing for resources, but are working collectively to solve public problems. The divergent requirements of branding and collaboration create a paradox that helps to explain why collaborations are hard to sustain. We integrate ideas from literature exploring public sector management, marketing, social identity, resource dependence, collaboration, and paradox management. Public administration is




Evaluation Framework for Collaborative Educational Virtual Environments  

ERIC Educational Resources Information Center

In this paper we will focus on a specific category of Collaborative Virtual Environments that aims to support Collaborative Learning. We call these environments Collaborative Educational Virtual Environments. Our aim is to analyze the evaluation process through the study of relevant bibliography and by doing so reveal the existing research gap…

Tsiatsos, Thrasyvoulos; Andreas, Konstantinidis; Pomportsis, Andreas



Motivating and supporting collaboration in open innovation  

Microsoft Academic Search

Purpose – The purpose of this paper is to explore collaboration in open innovation (OI) communities. The paper focuses on the following two research problems: how can users be motivated to collaborate in OI communities and what kind of tools and methods can support collaboration in OI communities? Design\\/methodology\\/approach – The exploratory case study includes three innovation intermediaries originated in

Maria Antikainen; Marko Mäkipää; Mikko Ahonen



Toward a Comprehensive Theory of Collaboration  

Microsoft Academic Search

The Journal of Applied Behavioral Science presents two special issues in which nine research-based articles and two overviews address various theoretical and empirical perspectives on the process of collaboration and the forms of collaborative alliances. In the first overview, the articles are mapped onto six theoretical perspectives according to how they address the preconditions, process, and outcomes of collaboration. In

Donna J. Wood; Barbara Gray



Collaboration: A Framework for School Improvement  

ERIC Educational Resources Information Center

The ability to work collaboratively with others is becoming an essential component of contemporary school reform. This article reviews current trends in school reform that embody collaborative principles and also draws on the literature to provide a theoretical overview of collaboration itself. The article then outlines the findings from a…

Slater, Lorraine



Collaborative Technology Use by Healthcare Teams  

Microsoft Academic Search

This paper reviews the literature on the use of collaborative technologies by healthcare teams between 1980 and 2003. Multiple databases were searched with explicit inclusion criteria that yielded 17 conceptual and empirical papers. The discussions of these literatures centered on the individual, team, and technological dimensions of collaborative technology use within healthcare teams. Results show that collaborative healthcare technologies can

Mowafa Said Househ; Francis Y. Lau



A Game Theoretic Analysis of Collaboration in  

E-print Network

trustworthiness and combating vandalism. Prior stud- ies in the area deal with descriptive aspects of peer of trustworthy collaboration as well as vandalism. Index Terms-Peer production, Wikipedia, collaboration, non-cooperative game, trust- worthy collaboration, vandalism Proceedings of the 4th International Conference

Mandayam, Narayan


Adult Collaboration: The "Glue" for School Improvement  

ERIC Educational Resources Information Center

The act of collaboration is important when improving communication between administration and teachers, guiding school personnel to collectively clarify teaching and learning outcomes, and facilitating school stakeholders to engage in strategic institutional planning. As necessary as collaboration is, adults often do not know how to collaborate

Damore, Sharon; Wiggins, Kathryn



Utilizing Collaboration Theory to Evaluate Strategic Alliances  

ERIC Educational Resources Information Center

Increasingly, "collaboration" between business, non-profit, health and educational agencies is being championed as a powerful strategy to achieve a vision otherwise not possible when independent entities work alone. But the definition of collaboration is elusive and it is often difficult for organizations to put collaboration into practice and…

Gajda, Rebecca



KidPad: collaborative storytelling for children  

Microsoft Academic Search

Collaborative storytelling occurs frequently when children play, but few efforts have been made to support it with computers. This demonstration presents KidPad, a collaborative storytelling tool that supports children creating hyperlinked stories in a large two-dimensional zoomable space. Through the use of local tools, KidPad provides children with advanced interaction techniques in a collaborative environment.

Juan Pablo Hourcade; Benjamin B. Bederson; Allison Druin; Gustav Taxén



The Validity of Collaborative Assessment for Learning  

ERIC Educational Resources Information Center

This article explores the features relating to the validity of assessment for learning, in particular the features of a "collaborative" assessment for learning, because of the learning benefits associated with collaborative learning. The article indicates what some of the learning benefits of highly valid collaborative assessment for learning…

Hargreaves, Eleanore



Quantitative assessment of collaboration Stphanie Buisine  

E-print Network

32 Quantitative assessment of collaboration Stéphanie Buisine Arts et Métiers ParisTech, LCPI, 151 literature review of a research trend that endeavors to model collaboration by quantifying each group members contribution. In such a view, equity is considered as the ideal collaborative situation. We review some

Paris-Sud XI, Université de


The validity of collaborative assessment for learning  

Microsoft Academic Search

This article explores the features relating to the validity of assessment for learning, in particular the features of a collaborative assessment for learning, because of the learning benefits associated with collaborative learning. The article indicates what some of the learning benefits of highly valid collaborative assessment for learning might be, assuming that a valid assessment for learning actually promotes learning.

Eleanore Hargreaves



Methodological Challenges for Collaborative Learning Research  

ERIC Educational Resources Information Center

Research on collaborative learning, both face-to-face and computer-supported, has thrived in the past 10 years. The studies range from outcome-oriented (individual and group learning) to process-oriented (impact of interaction on learning processes, motivation and organisation of collaboration) to mixed studies. Collaborative learning research is…

Strijbos, Jan-Willem; Fischer, Frank



Learning Strategies in Online Collaborative Examinations  

Microsoft Academic Search

New forms of computer-mediated, online learning can benefit from new forms of assessment that fit the medium and the pedagogical style of the online environment. This paper investigates students' learning styles and learning strategies in taking online collaborative exams. Applying constructivist and collaborative learning theories, the collaborative examination features students' active participation in various phases of the exam process through

Jia Shen; Starr Roxanne Hiltz; Michael Bieber



Online Collaborative Learning: Theory and Practice  

ERIC Educational Resources Information Center

"Online Collaborative Learning: Theory and Practice" provides a resource for researchers and practitioners in the area of online collaborative learning (also known as CSCL, computer-supported collaborative learning), particularly those working within a tertiary education environment. It includes articles of relevance to those interested in both…

Roberts, Tim, Ed.



Collaborative Online Projects in a Global Community  

Microsoft Academic Search

Collaborative online projects use communication technologies to communicate and collaborate effectively with schools in various locations to participate in projects which may be interdisciplinary or cross curricular in nature, with a defined purpose or theme in order to facilitate meaningful and authentic student learning. Collaborative online projects may use online communication technologies such as email, mailing lists, newsgroups, discussion boards,

Muriel Wells


Designing collaborative media: a challenge for CHI?  

Microsoft Academic Search

Collaborative media refers to digital media where people outside the traditional media industries participate in production as well as infrastructural design. We argue that (1) people's use of computers today increasingly comprise communicating in collaborative media, and that (2) designing collaborative media implies fundamental changes to design processes and designer roles, which in turn (3) forms a challenge to the

Jonas Löwgren; Bo Reimer



Quilt: a collaborative tool for cooperative writing  

Microsoft Academic Search

Quilt is a computer-based tool for collaborative writing, which provides annotation, messaging, computer conferencing, and notification facilities to support communication and information sharing among the collaborators on a document. In addition, extensible sets of social roles and communication types are used to provide views of a document tailored to individual collaborators or to other users of the document based upon

Robert S. Fish; Robert E. Kraut; Mary D. P. Leland; Michael Cohen



Factors Affecting Teachers' Perceived Readiness for Online Collaborative Learning: A Case Study in Malaysia  

Microsoft Academic Search

This paper investigates factors affecting the perceived readiness for online collaborative learning (OCL) of a sample of 86 mathematics teachers from 12 secondary schools. Descriptive analysis, factor analysis, confirmatory factor analysis and structure equation modeling were used to analyze the data. A moderately fit model was generated and able to inform that time constraint and insufficient access to technology such

Ah-choo Koo



Collaborative Learning Enhances Critical Thinking  

Microsoft Academic Search

Abstract: solve problems, and make decisionsAnuradha A. Gokhale is an Associate Professor at Western Illinois University in the Departmentof Industrial Education and Technology, and is currently a Visiting Associate Professor at IllinoisState University.-23-as a team. Therefore, the development and enhancement of critical-thinkingskills through collaborative learning is one of the primary goals of technologyeducation. The present research was designed to study

Anuradha A. Gokhale



Computer Support for Collaborative Designing  

Microsoft Academic Search

The purpose of the present study was to examine how collaborative designing could be facilitated by a new generation networked\\u000a learning environment (Future Learning Environment, FLE-Tools) and to analyze whether and how students working in the environment\\u000a were able to share their design process. The study was carried out by analyzing qualitatively knowledge posted to FLE-Tools’\\u000a database by three courses

Pirita Seitamaa-Hakkarainen; Anna-Mari Raunio; Asta Raami; Hanni Muukkonen; Kai Hakkarainen



Evaluation of Collaborative GIS Usage  

NASA Astrophysics Data System (ADS)

Remote real-time shared displays of information in a GIS user interface or geobrowser can provide valuable support to multidisciplinary research teams spread across different locations, emergency management personnel, and teams in the field. In terms of the classic computer supported cooperative work (CSCW) application matrix, this falls in the "same time, different place" quadrant. This shared remote interaction with multiple active participants is distinct from typical "collaborative GIS" research, which has emphasized publishing GIS data for researchers to use, making data available to the public, and large screen support for multiple people to interact with the GIS. This is a research study of small groups of people using standard computer applications - off the shelf GIS and remote control software - to collaboratively perform spatial search and analytical tasks. This system architecture implements a floor control policy specifying only one user at a time controlling the input but with all users immediately seeing the results. A simple request and approval process allows the users to change between controlling and viewing roles. The objective of this research is to improve the design of remote real-time shared GIS software based on empirical data focused on user-software interaction in a realistic scenario. The focus is on the interaction of the people with the software. The participants in the study evaluate the system in terms of ease of use and related factors. The evaluation includes the core of the Computer Usability Satisfaction Questionnaire (Lewis, 1995) enhanced with questions specific to remote collaboration. The results from the study serve to identify requirements for a more robust and usable approach to remote collaboration using spatial data. In addition to the basic requirements for sharing, the factors for designing a highly usable and effective system are described. CSCW issues of awareness, concurrency, and remote deictic references are addressed specifically for implementation in GIS.

Campbell, J. D.; McGuire, M.



Language Models of Collaborative Filtering  

Microsoft Academic Search

Collaborative filtering is a major technique to make personalized recommendations about information items (movies, books,\\u000a webpages etc) to individual users. In the literature, a common research objective is to predict unknown ratings of items for\\u000a a user, on the condition that the user has explicitly rated a certain amount of items. Nevertheless, in many practical situations,\\u000a we may only have

Jun Wang


ATBC Study - Research Collaboration Procedures

The two international partners of this project - the National Cancer Institute (NCI) and the National Institute for Health and Welfare of Finland (THL) - have primary responsibility for project research management, coordination, and oversight. The Nutritional Epidemiology Branch (NEB) represents the NCI in this regard. Study proposals for collaboration are submitted to the NCI or NPHI Principal Investigators (Dr. Albanes and Dr. Virtamo, respectively), and are reviewed at both institutions.


Distributed Scalable Collaborative Filtering Algorithm  

Microsoft Academic Search

\\u000a Collaborative filtering (CF) based recommender systems have gained wide popularity in Internet companies like Amazon, Netflix,\\u000a Google News, and others. These systems make automatic predictions about the interests of a user by inferring from information\\u000a about like-minded users. Real-time CF on highly sparse massive datasets, while achieving a high prediction accuracy, is a\\u000a computationally challenging problem. In this paper, we

Ankur Narang; Abhinav Srivastava; Naga Katta


Fermilab-Latin America collaboration  

SciTech Connect

Fermilab`s program of collaboration with Latin America was initiated by then-Director Leon Lederman about 1980. His goal was to aid Latin American physics, and particularly its particle physics; this latter aim is in keeping with the Laboratory`s particle physics mission. The reasons for collaboration between institutions in the US and Latin America are many, including geographic and cultural, together with the existence of many talented scientists and many centers of excellence in the region. There are also broader reasons; for example, it has been stated frequently that physics is the basis of much technology, and advanced technology is a necessity for a country`s development. There is nothing unique about Fermilab`s program; other US institutions can carry out similar activities, and some have carried out individual items in the past. On the Latin American side, such collaboration enables institutions there to carry out forefront physics research, and also to have the advantages of particle physics spin-offs, both in expertise in related technologies and in scientist training. In addition to particle physics, collaboration is possible in many other related areas. Although particle physics is frequently viewed as {open_quotes}big science{close_quotes}, all of the large research groups in the field are composed of many small university groups, each of which contributes to the experiment, the analysis and the physics. Fermilab is an international laboratory, open to all users; a research proposal is accepted on scientific merit and technical competence, not on the country of origin of the scientists making the proposal. Currently, of Fermilab`s approximately 1400 users, about 30% are from non-US institutions. It should be noted here that Fermilab`s funds, which come from the US government, are for particle physics only; however, there is some flexibility in interpretation of this.

Rubinstein, R.



National Workforce Assistance Collaborative (NWAC)  

NSDL National Science Digital Library

The National Workforce Assistance Collaborative (NWAC) site is sponsored by a U. S. Department of Labor initiative established in 1993 through a cooperative agreement with the National Alliance of Business and its partners. The site provides online access to materials and products produced by NWAC as well as additional instructional and staff training materials, research studies, databases, bibliographies, programs guides, reports, and articles concerning small and mid-sized businesses and the challenges they face.



ARmonica: a collaborative sonic environment  

Microsoft Academic Search

ARmonica is a 3D audiovisual augmented reality environment in which players can position and edit virtual bars that play sounds when struck by virtual balls launched under the influence of physics. Players experience ARmonica through head-tracked head-worn displays and tracked hand-held ultramobile personal computers, and interact through tracked Wii remotes and touch-screen taps. The goal is for players to collaborate

Mengu Sukan; Ohan Oda; Xiang Shi; Manuel Entrena; Shrenik Sadalgi; Jie Qi; Steven Feiner



Rocinante, a virtual collaborative visualizer  

SciTech Connect

With the goal of improving the ability of people around the world to share the development and use of intelligent systems, Sandia National Laboratories` Intelligent Systems and Robotics Center is developing new Virtual Collaborative Engineering (VCE) and Virtual Collaborative Control (VCC) technologies. A key area of VCE and VCC research is in shared visualization of virtual environments. This paper describes a Virtual Collaborative Visualizer (VCV), named Rocinante, that Sandia developed for VCE and VCC applications. Rocinante allows multiple participants to simultaneously view dynamic geometrically-defined environments. Each viewer can exclude extraneous detail or include additional information in the scene as desired. Shared information can be saved and later replayed in a stand-alone mode. Rocinante automatically scales visualization requirements with computer system capabilities. Models with 30,000 polygons and 4 Megabytes of texture display at 12 to 15 frames per second (fps) on an SGI Onyx and at 3 to 8 fps (without texture) on Indigo 2 Extreme computers. In its networked mode, Rocinante synchronizes its local geometric model with remote simulators and sensory systems by monitoring data transmitted through UDP packets. Rocinante`s scalability and performance make it an ideal VCC tool. Users throughout the country can monitor robot motions and the thinking behind their motion planners and simulators.

McDonald, M.J. [Sandia National Labs., Albuquerque, NM (United States). Intelligent Systems and Robotics Center; Ice, L.G. [Univ. of New Mexico, Albuquerque, NM (United States)




E-print Network

Much of space science now involves cooperation between multiple organizations and people. Scientific activities are multi-disciplinary and require access to distributed resources. Design of new aircraft and space plaOCorms involves teams of contractors and NASA personnel spread across the country and beyond. Operations of both manned and unmanned pla(forms require teamwork among on-board personnel, mission control, and technical specialists. In all of these cases, coordination and collaboration among the players are key to the success of the mission and activity. At the same time, a significant body of technicaI capability is emerging in the computer science research community and the commercial computer and communications industry. The combination of advances in computing and communications has made possible automated support of team activity through a wide variety of tools ranging from simple electronic mail and electronic access to data bases through to networking for advanced planning and scheduling and scientist-to-scientist and engineer-to-engineer interaction. In this paper, we summarize available collaboration technologies and their potential applications to space science. We then describe the investigations into remote coaching paradigms and the role of a specific collaboration tool for distributed task coordination in supporting such teleoperations. Work reported herein was supported in part byCooperative Agreement NCC 2-387 from

R. L. Brown; R. F. Haines; _esearch Inst For; Bat Leiner; R. L. Brown; R. F. Haines; R L. Brown; R. F. Haines



Advanced engineering environment collaboration project.  

SciTech Connect

The Advanced Engineering Environment (AEE) is a model for an engineering design and communications system that will enhance project collaboration throughout the nuclear weapons complex (NWC). Sandia National Laboratories and Parametric Technology Corporation (PTC) worked together on a prototype project to evaluate the suitability of a portion of PTC's Windchill 9.0 suite of data management, design and collaboration tools as the basis for an AEE. The AEE project team implemented Windchill 9.0 development servers in both classified and unclassified domains and used them to test and evaluate the Windchill tool suite relative to the needs of the NWC using weapons project use cases. A primary deliverable was the development of a new real time collaborative desktop design and engineering process using PDMLink (data management tool), Pro/Engineer (mechanical computer aided design tool) and ProductView Lite (visualization tool). Additional project activities included evaluations of PTC's electrical computer aided design, visualization, and engineering calculations applications. This report documents the AEE project work to share information and lessons learned with other NWC sites. It also provides PTC with recommendations for improving their products for NWC applications.

Lamph, Jane Ann; Pomplun, Alan R.; Kiba, Grant W.; Dutra, Edward G.; Dankiewicz, Robert J.; Marburger, Scot J.



An Agent-based B2B Collaboration Platform for Executing Collaborative Business Processes  

E-print Network

. Inter-organizational collaboration is carried out through the execution of collaborative business of conducting face-to-face negotiations and agreements for executing collaborative processes. This implies on the setting up of Business-to-Business collaborations with their business partners in order to manage inter-organizational

Boyer, Edmond


Re-engineering of collaborative e-learning systems: evaluation of system, collaboration  

E-print Network

Re-engineering of collaborative e-learning systems: evaluation of system, collaboration an experimentation of a collaborative e-learning system. In this kind of system, tracks arising from communication the effective evaluation of the learners' activity. In this paper, we will focus on a particular collaborative e-learning

Paris-Sud XI, Université de


Solving Linear Equations  

NSDL National Science Digital Library

This webpage includes six examples of solving linear equations using balancing. Students learn to "keep the equation balanced by making the same changes to both sides of the equal sign." Six examples of this mathematical process are included, each one being slightly more challenging than the last. Equations include more than one operation, variables, multiple terms on the same side, parentheses and fractions. The process for solving each is explained step by step.

Murray, Michael



Generalized spin precession equations  

NASA Astrophysics Data System (ADS)

The Bloch equations, which describe spin precession and relaxation in external magnetic fields, can be generalized to include the evolution of polarization tensors of various ranks in arbitrary multipole fields. We show applications of the generalized spin precession equations using simple examples from atomic, nuclear and condensed matter physics, and compare the various approaches found in the literature. The derivation of the generalized Bloch equations can be considerably simplified using a particular bra-ket notation for irreducible tensors.

Stöckmann, Hans-Jürgen; Dubbers, Dirk



Writing Linear Equations  

NSDL National Science Digital Library

This chapter covers linear equations in slope-intercept form and point-slope form, standard form for linear equations, equations of parallel and perpendicular lines, and solving real world problems using linear models. There are a number of example questions (with solutions) covering each aspect for educators to either review with students or let students tackle on their own. Each section also ends with review problems for students to solve.

Gloag, Andrew; Gloag, Anne



Mathieu problem The equation  

E-print Network

Mathieu problem The equation: ¨y + (a + 2 cos t) = 0 with a = 1 4 n2 + a1 + 2 a2 We are interested) sin n 2 For n = 1, show that some of the inhomogeneous terms of the y1 equation are resonant: y1 + 1 4 terms". Eliminate the baddies, write a single equation for A, and show that the solution grows

Balmforth, Neil


Kinetic Equation with Electromagnetic Interactions.  

National Technical Information Service (NTIS)

A kinetic equation for a plasma with electromagnetic interactions is derived in the shielding approximation. The equation is the analog of the Landau equation and has the same structure as the Landau equation but with a velocity dependent interaction repl...

J. T. Hogan, M. B. Lewis



On the Snider equation  

NASA Astrophysics Data System (ADS)

We study the physical content of the Snider quantum transport equation and the origin of a puzzling feature of this equation, which implies contradictory values for the one-particle density operator. We discuss in detail why the two values are in fact not very different provided that the studied particles have sufficiently large wave packets and only a small interaction probability, a condition which puts a limit on the validity of the Snider equation. In order to improve its range of application, we propose a reinterpretation of the equation as a "mixed" equation relating the real one-particle distribution function (on the left-hand side of the equation) to the "free" distribution (on the right-hand side), which we have introduced in a recent contribution. In its original form, the Snider equation is valid only when used to generate Boltzmann-type equations where collisions are treated as point processes in space and time (no range, no duration); in this approximation, virial corrections are not included, so that the real and free distributions coincide. If the equation is used beyond this approximation to generate nonlocal and density corrections, we conclude that the results are not necessarily correct.

Laloë, F.; Mullin, W. J.



International Collaboration for Venus Exploration  

NASA Astrophysics Data System (ADS)

The Venus Exploration Analysis Group (VEXAG) was established by NASA in July 2005 to identify scientific priorities and strategy for exploration of Venus. From the outset, VEXAG has been open to the international community participation and has followed the progress of the ESA Venus Express Mission and the JAXA Akasuki mission as well exploring potential broad international partnerships for Venus exploration through coordinated science and missions. This paper discussed three mechanisms through which these collaborations are being explored in which VEXAG members participate One pathway for international collaboration has been through COSPAR. The International Venus Exploration Working Group (IVEWG) was formed during the 2012 COSPAR general assembly in Mysore, India. Another potentially significant outcome has been the IVEWG’s efforts to foster a formal dialog between IKI and NASA/PSD on the proposed Venera D mission resulting in a meeting in June 2013 to be followed by a discussion at the 4MS3 conference in October 2013. This has now resulted in an agreement between NASA/PSD and IKI to form a joint Science Definition Team for Venera D. A second pathway has been through an international focus on comparative climatology. Scientists from the established space faring nations participated in a first international conference on Comparative Climatology for Terrestrial Planet (CCTP) in Boulder Colorado in June 2012 sponsored by several international scientific organizations. A second conference is planned for 2015. The Planetary Robotics Exploration Coordinating Group (PRECG) of International Academy of Astronautics (IAA) the IAA has been focusing on exploring affordable contributions to the robotic exploration by non-space-faring nations wishing to get involved in planetary exploration. PRECG has sponsored a two year study of Comparative Climatology for which Venus is the focal point and focused on engaging nations without deep space exploration capabilities. A third area of interchange has been the International Planetary Probe Workshop (IPPW) , now in its eleventh year, which brings together scientists, technologists and mission designers interested in the exploration of planets with atmospheres and particularly in the challenges of entry, descent and landing and sustained flight on other planets. IPPW has been an opportunity for developing the collaborations at a grass roots level. With both NASA and ESA favoring competitive rather than strategic approaches for selecting planetary missions (except for Moon and Mars), future collaboration on Venus exploration will involve flexible partnerships. However, international standards for proximity communication frequencies and protocols will be vital to international collaboration.

Cutts, James; Limaye, Sanjay; Zasova, Ludmila; Wilson, Colin; Ocampo, Adriana; Glaze, Lori; Svedhem, H.; Nakamura, Masato; Widemann, Thomas


Designing Facilities for Collaborative Operations  

NASA Technical Reports Server (NTRS)

A methodology for designing operational facilities for collaboration by multiple experts has begun to take shape as an outgrowth of a project to design such facilities for scientific operations of the planned 2003 Mars Exploration Rover (MER) mission. The methodology could also be applicable to the design of military "situation rooms" and other facilities for terrestrial missions. It was recognized in this project that modern mission operations depend heavily upon the collaborative use of computers. It was further recognized that tests have shown that layout of a facility exerts a dramatic effect on the efficiency and endurance of the operations staff. The facility designs (for example, see figure) and the methodology developed during the project reflect this recognition. One element of the methodology is a metric, called effective capacity, that was created for use in evaluating proposed MER operational facilities and may also be useful for evaluating other collaboration spaces, including meeting rooms and military situation rooms. The effective capacity of a facility is defined as the number of people in the facility who can be meaningfully engaged in its operations. A person is considered to be meaningfully engaged if the person can (1) see, hear, and communicate with everyone else present; (2) see the material under discussion (typically data on a piece of paper, computer monitor, or projection screen); and (3) provide input to the product under development by the group. The effective capacity of a facility is less than the number of people that can physically fit in the facility. For example, a typical office that contains a desktop computer has an effective capacity of .4, while a small conference room that contains a projection screen has an effective capacity of around 10. Little or no benefit would be derived from allowing the number of persons in an operational facility to exceed its effective capacity: At best, the operations staff would be underutilized; at worst, operational performance would deteriorate. Elements of this methodology were applied to the design of three operations facilities for a series of rover field tests. These tests were observed by human-factors researchers and their conclusions are being used to refine and extend the methodology to be used in the final design of the MER operations facility. Further work is underway to evaluate the use of personal digital assistant (PDA) units as portable input interfaces and communication devices in future mission operations facilities. A PDA equipped for wireless communication and Ethernet, Bluetooth, or another networking technology would cost less than a complete computer system, and would enable a collaborator to communicate electronically with computers and with other collaborators while moving freely within the virtual environment created by a shared immersive graphical display.

Norris, Jeffrey; Powell, Mark; Backes, Paul; Steinke, Robert; Tso, Kam; Wales, Roxana



Classification Techniques for Assessing Student Collaboration in Shared Wiki Spaces  

E-print Network

Classification Techniques for Assessing Student Collaboration in Shared Wiki Spaces Chitrabharathi of collaboration, performance and work pace. Keywords: Collaborative learning assessment, Wiki Assessment, Topic-line collaborative learning environment, the shared Wiki space. 2 Wiki Document Classification and Assessment Using

Kim, Jihie


Sharing Digital Ink in Heterogeneous Collaborative Environments Birendra Keshari  

E-print Network

our implementation of a shared whiteboard collaboration system for sharing digital ink across dif (digital ink messaging in a collaborative environment), wherein several users collaborate by us- ing penSharing Digital Ink in Heterogeneous Collaborative Environments Birendra Keshari Muthuselvam

Watt, Stephen M.


Asynchronous Collaborative Visualization on a Stick Francis T. Marchese  

E-print Network

-oriented personal information manager that functions as well as an asynchronous collaborative visualization system, collaborative visualization, computer supported collaborative work. INDEX TERMS: H.2 [Database Management]: DataAsynchronous Collaborative Visualization on a Stick Francis T. Marchese Pace University ABSTRACT

Marchese, Francis


Maxwell's Equations, Part V  

Microsoft Academic Search

This is the fifth installment in a series devoted to explaining Maxwell’s equations, the four mathematical statements upon which the classical theory of electromagnetic fields – and light – is based. Previous installments can be found on Spectroscopy’s website (whose URL can be found throughout these issues). Maxwell’s equations are expressed in the language of vector calculus, so a significant

David W. Ball



Linear Equations: Equivalence = Success  

ERIC Educational Resources Information Center

The ability to solve linear equations sets students up for success in many areas of mathematics and other disciplines requiring formula manipulations. There are many reasons why solving linear equations is a challenging skill for students to master. One major barrier for students is the inability to interpret the equals sign as anything other than…

Baratta, Wendy



The String Deviation Equation  

E-print Network

The relative motion of many particles can be described by the geodesic deviation equation. This can be derived from the second covariant variation of the point particle's action. It is shown that the second covariant variation of the string action leads to a string deviation equation.

Mark D. Roberts



The stochastic Burgers Equation  

Microsoft Academic Search

We study Burgers Equation perturbed by a white noise in space and time. We prove the existence of solutions by showing that the Cole-Hopf transformation is meaningful also in the stochastic case. The problem is thus reduced to the anaylsis of a linear equation with multiplicativehalf white noise. An explicit solution of the latter is constructed through a generalized Feynman-Kac

L. Bertini; N. Cancrini; G. Jona-Lasinio



Burgers Equation Revisited  

Microsoft Academic Search

This paper studies the 1D pressureless turbulence (the Burgers equation). It shows that reliable numerics in this problem is very easy to produce if one properly discretizes the Burgers equation. The numerics it presents confirms the 7\\/2 power law proposed for probability of observing large negative velocity gradients in this problem. It also suggests that the entire probability function for

V. Gurarie



Forms of Linear Equations  

NSDL National Science Digital Library

Students learn about four forms of equations: direct variation, slope-intercept form, standard form and point-slope form. They graph and complete problem sets for each, converting from one form of equation to another, and learning the benefits and uses of each.

VU Bioengineering RET Program, School of Engineering,


Uniqueness of Maxwell's Equations.  

ERIC Educational Resources Information Center

Shows that, as a consequence of two feasible assumptions and when due attention is given to the definition of charge and the fields E and B, the lowest-order equations that these two fields must satisfy are Maxwell's equations. (Author/GA)

Cohn, Jack



Sweetly Balanced Equations  

NSDL National Science Digital Library

In this (edible) activity, learners balance chemical equations using different kinds and colors of candy that represent different atoms. Learners will work in pairs and explore conservation of atoms. One partner will use his/her candy to simulate the reactant (left) side of the equation and the other partner will use his/her candy to simulate the product (right) side.

Rathjen, Don



Differential Equations Textbook  

NSDL National Science Digital Library

This is a free textbook which covers material for an introductory course on differential equations with some partial differential equations material, though it assumes knowledge of matrix theory. It includes a section on computing Fourier series of polynomials. It also includes a link to the freely available student solutions manual.

Trench, William F.



Energy Conservation (Bernoulli's Equation)  

NSDL National Science Digital Library

Professor Chiang Shih's Thermal-Fluids I course at the FAMU-FSU College of Engineering combines "the traditional thermal disciplines in Thermodynamics, heat transfer and fluid mechanics." This PowerPoint presentation, from Shih's lecture notes, illustrates Benoulli's Equation and energy conservation. Along with mathematical equations, there are also a number of illustrations and examples which show the concepts discussed.

Shih, Chiang



The generalized Jacobi equation  

NASA Astrophysics Data System (ADS)

The Jacobi equation in pseudo-Riemannian geometry determines the linearized geodesic flow. The linearization ignores the relative velocity of the geodesics. The generalized Jacobi equation takes the relative velocity into account; that is, when the geodesics are neighbouring but their relative velocity is arbitrary the corresponding geodesic deviation equation is the generalized Jacobi equation. The Hamiltonian structure of this nonlinear equation is analysed in this paper. The tidal accelerations for test particles in the field of a plane gravitational wave and the exterior field of a rotating mass are investigated. In the latter case, the existence of an attractor of uniform relative radial motion with speed 2-1/2c ? 0.7c is pointed out. The astrophysical implication of this result for the terminal speed of a relativistic jet is briefly explored.

Chicone, C.; Mashhoon, B.



Improving collaborative documentation in CMS  

NASA Astrophysics Data System (ADS)

Complete and up-to-date documentation is essential for efficient data analysis in a large and complex collaboration like CMS. Good documentation reduces the time spent in problem solving for users and software developers. The scientists in our research environment do not necessarily have the interests or skills of professional technical writers. This results in inconsistencies in the documentation. To improve the quality, we have started a multidisciplinary project involving CMS user support and expertise in technical communication from the University of Turku, Finland. In this paper, we present possible approaches to study the usability of the documentation, for instance, usability tests conducted recently for the CMS software and computing user documentation.

Lassila-Perini, Kati; Salmi, Leena



Equations shorten pipe collapse calculations  

SciTech Connect

The API suggests collapse pressure equations for long, perfectly round, steel oil field casing, tubing, drill pipe, and line pipe. Operating and service company engineers can substitute two pipe collapse pressure equations for the 12 API equations now in general use. The shorthand results are almost the same as those from the API equations. The shorthand method has the additional advantage of allowing units from any measurement system. The API equations restrict calculations to US units only. The equation box lists the API (Equations 1--12) and the shorthand (Equations 13--14) equations. The API equations are based on work started shortly after the turn of the century.

Avakov, V.A. [Halliburton Energy Services, Duncan, OK (United States)



Polymorphic collaboration in the global grid  

NASA Astrophysics Data System (ADS)

Next generation collaborative systems must be able to represent the same information in different forms on a broad spectrum of devices and resources from low end personal digital assistants (PDA) to high performance computers (HPC). Users might be on a desktop then switch to a laptop and then to a PDA while accessing the global grid. The user preference profile for a collaboration session should be capable of moving with them as well as be automatically adjusted for the device type. Collaborative systems must be capable of representing the same information in many forms for different domains and on many devices and thus be polymorphic. Polymorphic collaboration will provide an ability for multiple heterogeneous resources (human to human, human to machine and machine to machine) to share information and activities, as well as the ability to regulate collaborative sessions based on client characteristics and needs; reuse user profiles, tool category choices, and settings in future collaboration session by same or different users; use intelligent agents to assist collaborative systems in learning user/resource preferences and behaviors, and autonomously derive optimal information to provide to users and decision makers. This paper discusses ongoing research in next generation collaborative environments with the goal of making electronic collaboration as easy to use as the telephone - collaboration at the touch of the screen.

McQuay, William K.



Nonlinear gyrokinetic equations  

SciTech Connect

Nonlinear gyrokinetic equations are derived from a systematic Hamiltonian theory. The derivation employs Lie transforms and a noncanonical perturbation theory first used by Littlejohn for the simpler problem of asymptotically small gyroradius. For definiteness, we emphasize the limit of electrostatic fluctuations in slab geometry; however, there is a straight-forward generalization to arbitrary field geometry and electromagnetic perturbations. An energy invariant for the nonlinear system is derived, and various of its limits are considered. The weak turbulence theory of the equations is examined. In particular, the wave kinetic equation of Galeev and Sagdeev is derived from an asystematic truncation of the equations, implying that this equation fails to consider all gyrokinetic effects. The equations are simplified for the case of small but finite gyroradius and put in a form suitable for efficient computer simulation. Although it is possible to derive the Terry-Horton and Hasegawa-Mima equations as limiting cases of our theory, several new nonlinear terms absent from conventional theories appear and are discussed.

Dubin, D.H.E.; Krommes, J.A.; Oberman, C.; Lee, W.W.



Deformed Fokker-Planck Equations  

E-print Network

Based on the well-known relation between Fokker-Planck equations and Schroedinger equations of quantum mechanics (QM), we propose new deformed Fokker-Planck (FP) equations associated with the Schroedinger equations of "discrete" QM. The latter is a natural discretization of QM and its Schroedinger equations are difference instead of differential equations. Exactly solvable FP equations are obtained corresponding to exactly solvable "discrete" QM, whose eigenfunctions include various deformations of the classical orthogonal polynomials.

Choon-Lin Ho; Ryu Sasaki



Collaborative virtual environments art exhibition  

NASA Astrophysics Data System (ADS)

This panel presentation will exhibit artwork developed in CAVEs and discuss how art methodologies enhance the science of VR through collaboration, interaction and aesthetics. Artists and scientists work alongside one another to expand scientific research and artistic expression and are motivated by exhibiting collaborative virtual environments. Looking towards the arts, such as painting and sculpture, computer graphics captures a visual tradition. Virtual reality expands this tradition to not only what we face, but to what surrounds us and even what responds to our body and its gestures. Art making that once was isolated to the static frame and an optimal point of view is now out and about, in fully immersive mode within CAVEs. Art knowledge is a guide to how the aesthetics of 2D and 3D worlds affect, transform, and influence the social, intellectual and physical condition of the human body through attention to psychology, spiritual thinking, education, and cognition. The psychological interacts with the physical in the virtual in such a way that each facilitates, enhances and extends the other, culminating in a "go together" world. Attention to sharing art experience across high-speed networks introduces a dimension of liveliness and aliveness when we "become virtual" in real time with others.

Dolinsky, Margaret; Anstey, Josephine; Pape, Dave E.; Aguilera, Julieta C.; Kostis, Helen-Nicole; Tsoupikova, Daria



Shared Understanding for Collaborative Control  

SciTech Connect

This paper presents results from three experiments in which human operators were teamed with a mixed-initiative robot control system to accomplish various indoor search and exploration tasks. By assessing human workload and error together with overall performance, these experiments provide an objective means to contrast different modes of robot autonomy and to evaluate both the usability of the interface and the effectiveness of autonomous robot behavior. The first experiment compares the performance achieved when the robot takes initiative to support human driving with the opposite case when the human takes initiative to support autonomous robot driving. The utility of robot autonomy is shown through achievement of better performance when the robot is in the driver’s seat. The second experiment introduces a virtual three-dimensional (3-D) map representation that supports collaborative understanding of the task and environment. When used in place of video, the 3-D map reduced operator workload and navigational error. By lowering bandwidth requirements, use of the virtual 3-D interface enables long-range, nonline-of-sight communication. Results from the third experiment extend the findings of experiment 1 by showing that collaborative control can increase performance and reduce error even when the complexity of the environment is increased and workload is distributed amongst multiple operators.

David Bruemmer; Douglas Few; Ronald Boring; Julie Marble; Miles Walton; Curtis Nielsen



Distributed and collaborative synthetic environments  

NASA Technical Reports Server (NTRS)

Fast graphics workstations and increased computing power, together with improved interface technologies, have created new and diverse possibilities for developing and interacting with synthetic environments. A synthetic environment system is generally characterized by input/output devices that constitute the interface between the human senses and the synthetic environment generated by the computer; and a computation system running a real-time simulation of the environment. A basic need of a synthetic environment system is that of giving the user a plausible reproduction of the visual aspect of the objects with which he is interacting. The goal of our Shastra research project is to provide a substrate of geometric data structures and algorithms which allow the distributed construction and modification of the environment, efficient querying of objects attributes, collaborative interaction with the environment, fast computation of collision detection and visibility information for efficient dynamic simulation and real-time scene display. In particular, we address the following issues: (1) A geometric framework for modeling and visualizing synthetic environments and interacting with them. We highlight the functions required for the geometric engine of a synthetic environment system. (2) A distribution and collaboration substrate that supports construction, modification, and interaction with synthetic environments on networked desktop machines.

Bajaj, Chandrajit L.; Bernardini, Fausto



Nonlinear ordinary difference equations  

NASA Technical Reports Server (NTRS)

Future space vehicles will be relatively large and flexible, and active control will be necessary to maintain geometrical configuration. While the stresses and strains in these space vehicles are not expected to be excessively large, their cumulative effects will cause significant geometrical nonlinearities to appear in the equations of motion, in addition to the nonlinearities caused by material properties. Since the only effective tool for the analysis of such large complex structures is the digital computer, it will be necessary to gain a better understanding of the nonlinear ordinary difference equations which result from the time discretization of the semidiscrete equations of motion for such structures.

Caughey, T. K.



Tie strength distribution in scientific collaboration networks  

NASA Astrophysics Data System (ADS)

Science is increasingly dominated by teams. Understanding patterns of scientific collaboration and their impacts on the productivity and evolution of disciplines is crucial to understand scientific processes. Electronic bibliography offers a unique opportunity to map and investigate the nature of scientific collaboration. Recent studies have demonstrated a counterintuitive organizational pattern of scientific collaboration networks: densely interconnected local clusters consist of weak ties, whereas strong ties play the role of connecting different clusters. This pattern contrasts itself from many other types of networks where strong ties form communities while weak ties connect different communities. Although there are many models for collaboration networks, no model reproduces this pattern. In this paper, we present an evolution model of collaboration networks, which reproduces many properties of real-world collaboration networks, including the organization of tie strengths, skewed degree and weight distribution, high clustering, and assortative mixing.

Ke, Qing; Ahn, Yong-Yeol



Tie Strength Distribution in Scientific Collaboration Networks  

E-print Network

Science is increasingly dominated by teams. Understanding patterns of scientific collaboration and their impacts on the productivity and evolution of disciplines is crucial to understand scientific processes. Electronic bibliography offers a unique opportunity to map and investigate the nature of scientific collaboration. Recent work have demonstrated a counter-intuitive organizational pattern of scientific collaboration networks: densely interconnected local clusters consist of weak ties, whereas strong ties play the role of connecting different clusters. This pattern contrasts itself from many other types of networks where strong ties form communities while weak ties connect different communities. Although there are many models for collaboration networks, no model reproduces this pattern. In this paper, we present an evolution model of collaboration networks, which reproduces many properties of real-world collaboration networks, including the organization of tie strengths, skewed degree and weight distribut...

Ke, Qing



Equations For Rotary Transformers  

NASA Technical Reports Server (NTRS)

Equations derived for input impedance, input power, and ratio of secondary current to primary current of rotary transformer. Used for quick analysis of transformer designs. Circuit model commonly used in textbooks on theory of ac circuits.

Salomon, Phil M.; Wiktor, Peter J.; Marchetto, Carl A.



Master equation - tutorial approach  

E-print Network

We do not present any original or new material. This is a tutorial addressed to students who need to study the microscopic derivation of the quantum-mechanical master equation encountered in many practical physical situations.

Stanislaw Kryszewski; Justyna Czechowska-Kryszk



Mathematica Tutor: Differential Equations  

NSDL National Science Digital Library

Created for the Connected Curriculum Project, the purpose of this module is to learn the basics of Mathematica for use with the differential equations modules. This is one lesson within a larger set of learning modules hosted by Duke University.

Holden, Joshua; Moore, Lang; Smith, David; Tomberg, Jim



The Constraint Equations  

E-print Network

We review the properties of the constraint equations, from their geometric origin in hypersurface geometry through to their roles in the Cauchy problem and the Hamiltonian formulation of the Einstein equations. We then review properties of the space of solutions and construction techniques, including the conformal and conformal thin sandwich methods, the thin sandwich method, quasi-spherical and generalized QS methods, gluing techniques and the Corvino-Schoen projection.

Robert Bartnik; Jim Isenberg



Equations of Attack  

NSDL National Science Digital Library

In this lesson, "students will plot points on a coordinate grid to represent ships before playing a graphing equations game with a partner. Points along the y-axis represent cannons and slopes are chosen randomly to determine the line and equation of attacks. Students will have to use their math skills and strategy to sink their opponent's ships and win the game. After the game, an algebraic approach to the game is investigated." (from NCTM's Illuminations)

Mathematics, Illuminations N.



Differential equations V: Oscillations  

NSDL National Science Digital Library

To describe how oscillations are supported in systems of differential equations, we present a classic "Romeo and Juliet" picture of two-dimensional oscillations, and we analyze how trajectories change as nullclines are arranged at different angles in the phase plane. In addition to models based on traditional systems of differential equations, dynamical systems with time delays and dynamical systems with stochastic fluctuation (i.e. stochastic resonance) can also support oscillations.

Liao, David


RIT Global Collaboration Grid February, 2011  

E-print Network

's Sponsors #12;Enables Advanced Applications · Telemedicine · Distance Learning · Cultural exchanges · Research Collaborations · Musical Events · Theatrical Performances #12;Telemedicine University of Puerto

Figer, Donald F.


Research, practice and the Cochrane Collaboration.  

PubMed Central

The Cochrane Collaboration coordinates the efforts of health care professionals and researchers around the world to prepare, maintain and disseminate systematic reviews of health care research. In carrying out the first two tasks the collaboration employs a rigorous method for analysing the findings of randomized controlled trials; this method was developed in the 1980s and has undergone continual improvement since then. The collaborators believe their work will consolidate and make available the accumulated results of sound research assessing the effectiveness of health care interventions and thus steer health care professionals and consumers toward the right treatments and help guide research into new therapies. Since the collaboration began, in 1993, Cochrane centres have been set up in the British Isles, Canada, Denmark, Italy, the Netherlands and the United States, and many new Cochrane review groups have been registered. Canadian scientists have played an important role in the collaboration. They have prepared and maintained systematic reviews, hosted the collaboration's second annual colloquium and are currently in the vanguard of efforts to facilitate the dissemination of collaboration documents. Although the collaboration uses new modes of communication it has not abandoned traditional ones. Nor has it underestimated the work that remains to be done to bring review findings to the attention of health care providers. Early indications suggest, however, that the collaboration's basic message about the importance of evidence-based practice is getting through. Images p885-a PMID:7697581

Robinson, A



Collaborative Surface Migration Behavior of Proteus mirabilis  

NSDL National Science Digital Library

Collaborative migration behavior exerted by Proteus mirabilis cells on the surface of a low-agar medium. The organisms were differentiating into elongated hyperflagellates and gathering for migration.

American Society For Microbiology;



Towards Collaborative Engineering in the Aerospace Industry  

E-print Network

This paper reports on the experiences and lessons learned from the implementation and utilisation of collaborative engineering applications that address the increasing demand for richer and faster communication in product development between different partners and locations in the aerospace industry. The paper outlines MTU’s Collaborative Engineering Initiative and highlights the requirements analysis and tool selection process for a first step towards engineering collaboration. Two web-based applications that were implemented and tested at MTU Aero Engines are presented and the experiences with the chosen tools are discussed. An outlook into the future of collaborative engineering at MTU is given.

Thomas M. Rupp


Collaborative Exploration with Dynamically Configurable Sensing Agents  

E-print Network

Collaborative Exploration with Dynamically Configurable Sensing Agents Darius Burschka Computer;2 Darius Burschka solution has the advantage of flexible task-dependent specification of their loca- tions

Boyer, Edmond


Computational Approaches for Predicting Biomedical Research Collaborations  

PubMed Central

Biomedical research is increasingly collaborative, and successful collaborations often produce high impact work. Computational approaches can be developed for automatically predicting biomedical research collaborations. Previous works of collaboration prediction mainly explored the topological structures of research collaboration networks, leaving out rich semantic information from the publications themselves. In this paper, we propose supervised machine learning approaches to predict research collaborations in the biomedical field. We explored both the semantic features extracted from author research interest profile and the author network topological features. We found that the most informative semantic features for author collaborations are related to research interest, including similarity of out-citing citations, similarity of abstracts. Of the four supervised machine learning models (naïve Bayes, naïve Bayes multinomial, SVMs, and logistic regression), the best performing model is logistic regression with an ROC ranging from 0.766 to 0.980 on different datasets. To our knowledge we are the first to study in depth how research interest and productivities can be used for collaboration prediction. Our approach is computationally efficient, scalable and yet simple to implement. The datasets of this study are available at PMID:25375164

Zhang, Qing; Yu, Hong



Collaborating Fuzzy Reinforcement Learning Agents  

NASA Technical Reports Server (NTRS)

Earlier, we introduced GARIC-Q, a new method for doing incremental Dynamic Programming using a society of intelligent agents which are controlled at the top level by Fuzzy Relearning and at the local level, each agent learns and operates based on ANTARCTIC, a technique for fuzzy reinforcement learning. In this paper, we show that it is possible for these agents to compete in order to affect the selected control policy but at the same time, they can collaborate while investigating the state space. In this model, the evaluator or the critic learns by observing all the agents behaviors but the control policy changes only based on the behavior of the winning agent also known as the super agent.

Berenji, Hamid R.



PCCR: Pancreatic Cancer Collaborative Registry.  


The Pancreatic Cancer Collaborative Registry (PCCR) is a multi-institutional web-based system aimed to collect a variety of data on pancreatic cancer patients and high-risk subjects in a standard and efficient way. The PCCR was initiated by a group of experts in medical oncology, gastroenterology, genetics, pathology, epidemiology, nutrition, and computer science with the goal of facilitating rapid and uniform collection of critical information and biological samples to be used in developing diagnostic, prevention and treatment strategies against pancreatic cancer. The PCCR is a multi-tier web application that utilizes Java/JSP technology and has Oracle 10 g database as a back-end. The PCCR uses a "confederation model" that encourages participation of any interested center, irrespective of its size or location. The PCCR utilizes a standardized approach to data collection and reporting, and uses extensive validation procedures to prevent entering erroneous data. The PCCR controlled vocabulary is harmonized with the NCI Thesaurus (NCIt) or Systematized Nomenclature of Medicine-Clinical Terms (SNOMED-CT). The PCCR questionnaire has accommodated standards accepted in cancer research and healthcare. Currently, seven cancer centers in the USA, as well as one center in Italy are participating in the PCCR. At present, the PCCR database contains data on more than 2,700 subjects (PC patients and individuals at high risk of getting this disease). The PCCR has been certified by the NCI Center for Biomedical Informatics and Information Technology as a cancer Biomedical Informatics Grid (caBIG(®)) Bronze Compatible product. The PCCR provides a foundation for collaborative PC research. It has all the necessary prerequisites for subsequent evolution of the developed infrastructure from simply gathering PC-related data into a biomedical computing platform vital for successful PC studies, care and treatment. Studies utilizing data collected in the PCCR may engender new approaches to disease prognosis, risk factor assessment, and therapeutic interventions. PMID:21552494

Sherman, Simon; Shats, Oleg; Ketcham, Marsha A; Anderson, Michelle A; Whitcomb, David C; Lynch, Henry T; Ghiorzo, Paola; Rubinstein, Wendy S; Sasson, Aaron R; Grizzle, William E; Haynatzki, Gleb; Feng, Jianmin; Sherman, Alexander; Kinarsky, Leo; Brand, Randall E



The Bernoulli-Poiseuille Equation.  

ERIC Educational Resources Information Center

Describes Bernoulli's equation and Poiseuille's equation for fluid dynamics. Discusses the application of the combined Bernoulli-Poiseuille equation in real flows, such as viscous flows under gravity and acceleration. (YP)

Badeer, Henry S.; Synolakis, Costas E.



PBL and beyond: trends in collaborative learning.  


Building upon the disruption to lecture-based methods triggered by the introduction of problem-based learning, approaches to promote collaborative learning are becoming increasingly diverse, widespread and generally well accepted within medical education. Examples of relatively new, structured collaborative learning methods include team-based learning and just-in-time teaching. Examples of less structured approaches include think-pair share, case discussions, and the flipped classroom. It is now common practice in medical education to employ a range of instructional approaches to support collaborative learning. We believe that the adoption of such approaches is entering a new and challenging era. We define collaborate learning by drawing on the broader literature, including Chi's ICAP framework that emphasizes the importance of sustained, interactive explanation and elaboration by learners. We distinguish collaborate learning from constructive, active, and passive learning and provide preliminary evidence documenting the growth of methods that support collaborative learning. We argue that the rate of adoption of collaborative learning methods will accelerate due to a growing emphasis on the development of team competencies and the increasing availability of digital media. At the same time, the adoption collaborative learning strategies face persistent challenges, stemming from an overdependence on comparative-effectiveness research and a lack of useful guidelines about how best to adapt collaborative learning methods to given learning contexts. The medical education community has struggled to consistently demonstrate superior outcomes when using collaborative learning methods and strategies. Despite this, support for their use will continue to expand. To select approaches with the greatest utility, instructors must carefully align conditions of the learning context with the learning approaches under consideration. Further, it is critical that modifications are made with caution and that instructors verify that modifications do not impede the desired cognitive activities needed to support meaningful collaborative learning. PMID:24246112

Pluta, William J; Richards, Boyd F; Mutnick, Andrew



Study of the Impact of Collaboration among Teachers in a Collaborative Authoring System  

ERIC Educational Resources Information Center

Several researchers have studied the impact of collaboration between the learners on their cognitive levels, but few studies have been carried out on the impact of collaboration between the teachers. The aim of our research is to study the effects on the knowledge levels of learners of collaborative construction of learning objects created by the…

Lafifi, Yacine; Touil, Ghassen



Research Methods for Collaboration Engineering: An Assessment of Applicability Using Collaborative PolicyMaking Example  

Microsoft Academic Search

Collaboration Engineering (CE) is a new field of research and practice which involves the design of recurring collaboration processes that are meant to cause predictable and success among organizations' recurring mission-critical collaborative tasks. To measure the effectiveness of CE research efforts, we would need to use a research methodology. This article therefore provides an overview of selected research methods, and

Josephine Nabukenya; Gert-Jan de Vreede



Collaborative Learning: Sourcebook for Collaborative Learning in the Arts and Sciences at Indiana University.  

ERIC Educational Resources Information Center

This sourcebook, prepared by the Intercampus Group on Collaborative Learning of Indiana University, offers suggestions to those who are already familiar with collaborative learning, but want to know how others are responding to the same or similar challenges. Papers are presented that examine general issues of collaborative learning in the Arts…

Hamilton, Sharon J., Ed.; Hansen, Edmund J., Ed.


Existing Collaborations at UMass at the Materials-Immunology Interface Collaborative Grants (active or recently finished)  

E-print Network

Existing Collaborations at UMass at the Materials-Immunology Interface Collaborative Grants (active.J. and Latz, E. (UMass Worcester, Immunology), UMass President's Science and Technology Funds (UMass patent filing 2/2010. Teaching Collaborations: Immunology lab (Microbio 542). This laboratory course

Mountziaris, T. J.


Use of an Interculturally Enriched Collaboration Script in Computer-Supported Collaborative Learning in Higher Education  

ERIC Educational Resources Information Center

In this exploratory study, the authors introduced an interculturally enriched collaboration script (IECS) for working in culturally diverse groups within a computer-supported collaborative learning (CSCL) environment and then assessed student online collaborative behaviour, learning performance and experiences. The question was if and how these…

Popov, Vitaliy; Biemans, Harm J. A.; Kuznetsov, Andrei N.; Mulder, Martin



A Data Mining Approach to Reveal Representative Collaboration Indicators in Open Collaboration Frameworks  

ERIC Educational Resources Information Center

Data mining methods are successful in educational environments to discover new knowledge or learner skills or features. Unfortunately, they have not been used in depth with collaboration. We have developed a scalable data mining method, whose objective is to infer information on the collaboration during the collaboration process in a…

Anaya, Antonio R.; Boticario, Jesus G.



Collaboration in Student Teaching: Introducing the Collaboration Self-Assessment Tool  

ERIC Educational Resources Information Center

The need to collaborate in the fields of business, health care, and technology is not a new concept. Educational institutions, however, have been slow to recognize the need to teach collaboration skills (Brownell & Walther-Thomas, 2002; Jackson, 2004). This article focuses on the development of the Collaboration Self-Assessment Tool (CSAT). The…

Ofstedal, Kathleen; Dahlberg, Kathryn



Evolution profiles and functional equations.  

SciTech Connect

Time evolution is formulated and discussed in the framework of Schroeder's functional equation. The proposed method yields smooth, continuous dynamics without the prior need for local propagation equations.

Curtright, T.; Zachos, C.; High Energy Physics; Univ. of Miami



Stochastic morphological evolution equations  

NASA Astrophysics Data System (ADS)

The inadequacy of locally defined set-valued differential equations to describe the evolution of shapes and morphological forms in biology, which are usually neither convex or nondecreasing, was recognised by J.-P. Aubin, who introduced morphological evolution equations, which are essentially nonlocally defined set-valued differential equations with the inclusion vector field also depending on the entire reachable set. This concept is extended here to the stochastic setting of set-valued Itô evolution equations in Hilbert spaces. Due to the nonanticipative nature of Itô calculus, the evolving reachable sets are nonanticipative nonempty closed random sets. The existence of solutions and their dependence on initial data are established. The latter requires the introduction of a time-oriented semi-metric in time-space variables. As a consequence the stochastic morphological evolution equations generate a deterministic nonautonomous dynamical system formulated as a two-parameter semigroup with the complication that the random subsets take values in different spaces at different time instances due to the nonanticipativity requirement. It is also shown how nucleation processes can be handled in this conceptual framework.

Kloeden, Peter E.; Lorenz, Thomas


Difference and Functional Equations  

NSDL National Science Digital Library

A short article designed to provide an introduction to functional equations, those in which a function is sought which is to satisfy certain relations among its values at all points. For example, we may look for functions satisfying f(x*y)=f(x)+f(y) and enquire whether the logarithm function f(x)=log(x) is the only solution. (It's not.) In some cases the nature of the answer is different when we insist that the functional equation hold for all real x, or all complex x, or only those in certain domains, for example. A special case involves difference equations, that is, equations comparing f(x) - f(x-1), for example, with some expression involving x and f(x). In some ways these are discrete analogues of differential equations; thus we face similar questions of existence and uniqueness of solutions, global behaviour, and computational stability. History; applications and related fields and subfields; textbooks, reference works, and tutorials; software and tables; other web sites with this focus.

Rusin, David J., 1957-



Cross-System Collaboration: Tools That Work.  

ERIC Educational Resources Information Center

This monograph reports on a collaborative initiative between Four Oaks, a private nonprofit family service agency in Iowa, and the Iowa Department of Human Services. The collaboration provided a series of community forums of local representatives to examine services available to delinquent youth and their families, to increase community awareness…

Hoel, James L.


Collaborative Job Training in Rural Areas  

ERIC Educational Resources Information Center

We examine collaborative efforts by employers to provide job training in rural areas and assess how this collaboration affects the willingness of employers to train workers. Data are drawn from a telephone survey conducted in 2001 of a stratified random sample of 1,590 nonmetropolitan firms in the U.S. The literature on job training suggests that…

Green, Gary Paul; Galetto, Valeria; Haines, Anna



Reminiscences of Collaborations with Joel Scherk  

E-print Network

I had the privilege of collaborating with Joel Scherk on three separate occasions: in 1970 at Princeton, in 1974 at Caltech, and in 1978-79 at the Ecole Normale Superieure. In this talk I give some reminiscences of these collaborations.

John H. Schwarz



Writing Together: An Arendtian Framework for Collaboration  

ERIC Educational Resources Information Center

This essay considers the long-standing challenges, in both practice and theory, to collaborative writing in the first-year classroom. I argue that Hannah Arendt's concepts of plurality and natality are useful frameworks for thinking constructively and practically about teaching argumentative writing through collaboration. I explore these…

Restaino, Jessica



Collaborative Assessment: Fostering Ownership in Assessment  

ERIC Educational Resources Information Center

This paper focuses on the results of a study conducted to explore the effects of collaborative assessment. Forty college students studying at the English Language Teaching Department participated in the study. During the study the participants were briefed about the principles and practices of collaborative and self-assessment and were given the…

Kurt, Mustafa



Web Based Collaboration-Aware Synthetic Environments  

Microsoft Academic Search

IntroductionThis short paper describes the Shastra collaborative Web substrate and presents four synthetic environmentsthat are under development, and take advantage of this substrate. The Shastra substrate providesan environment which streamlines the creation, experimentation and testing of Web1based collaborativeapplications. The applications provide useful interactions in collaborative geometric design prototyping,battlefield training, networked learning, and multi-user business...

Chandrajit Bajaj; Steve Cutchin



Examining Collaboration on Interdisciplinary Sport Science Teams  

Microsoft Academic Search

Abstract The attainment of optimal sport performance,has become increasingly scientific and requires sport scientists to collaborate on training programs in order totake a holistic view of performance (Cherebetiu, 1980; Patrick, 2001). Collaborative approaches range from multidisciplinary teams - where sport scientists work with athletes in a singular fashion (Reid, Stewart, & Thorne, 2004; Thomas, 2001), to interdisciplinary teams - where

Lisa J. Rogerson; William B. Strean


Common Ground. Feminist Collaboration in the Academy.  

ERIC Educational Resources Information Center

The fifteen articles in this anthology examine the process of collaboration as it fits into questions of gender. Articles include: "Educate, Organize, and Agitate: A Historical Overview of Feminist Collaboration in Great Britain and America, 1640-1930" (Melodie Andrews); "Beyond Feminism: An Intercultural Challenge for Transforming the Academy"…

Peck, Elizabeth G., Ed.; Mink, JoAnna Stephens, Ed.


Collaborative Knowledge Management Supporting Mars Mission Scientists  

E-print Network

Collaborative Knowledge Management Supporting Mars Mission Scientists Irene Tollinger NASA Ames a collaborative workspace for collocated mission scientists for the Mars Exploration Rovers (MER) 2003 mission. The purpose of the MER mission is to further Mars exploration through the deployment of twin robotic rovers


Google news personalization: scalable online collaborative filtering  

Microsoft Academic Search

Several approaches to collaborative filtering have been stud- ied but seldom have studies been reported for large (several million users and items) and dynamic (the underlying item set is continually changing) settings. In this paper we de- scribe our approach to collaborative filtering for generating personalized recommendations for users of Google News. We generate recommendations using three approaches: collabo- rative

Abhinandan S. Das; Mayur Datar; Ashutosh Garg; Shyamsundar Rajaram



Collaborative Leadership for Promoting Effective School Change.  

ERIC Educational Resources Information Center

When initiating major structural change in schools, collaboration among educators, community members, and business persons is vital. This publication describes the efforts of the Ysleta (Texas) Independent School District, which successfully used collaboration to promote effective school change. Within the district, the Del Valle High School has…

Mullen, Bennat; And Others



Peer Interaction in Three Collaborative Learning Environments  

ERIC Educational Resources Information Center

The aim of the study was to gain insight into the occurrence of different types of peer interaction and particularly the types of interaction beneficial for learning in different collaborative learning environments. Based on theoretical notions related to collaborative learning and peer interaction, a coding scheme was developed to analyze the…

Staarman, Judith Kleine; Krol, Karen; Meijden, Henny van der



Collaborative Learning and Computer-Supported Groups.  

ERIC Educational Resources Information Center

Discusses theoretical and empirical research relevant to the use of computer-supported collaborative learning (CSCL)--including including collaborative-learning research and computer-mediated communication research--using a descriptive model to categorize the literature. Shows how the model provides guidance in designing and utilizing CSCL…

Brandon, David P.; Hollingshead, Andrea B.



Collaborative Strategic Planning in Higher Education  

ERIC Educational Resources Information Center

This book outlines a simple, five-phase collaborative approach to strategic planning that has worked effectively on many campuses. Specifically, Collaborative Strategic Planning (CSP) refers to the disciplined and thoughtful process of meaningfully engaging relevant stakeholders in creating a shared future vision and goals for their institution.…

Sanaghan, Patrick



Report urges collaboration on inmate discharge planning.  


A report from the National Institute of Justice and the Centers for Disease Control and Prevention has recommended that prisons do more discharge planning for HIV-positive inmates being released to the community. Public health and correctional agencies should collaborate more in discharge planning and transitional services. Recommendations for how to obtain a closer collaboration are provided. PMID:11365680



Learning Strategies in Online Collaborative Examinations  

E-print Network

Abstract—New forms of computer-mediated, online learning can benefit from new forms of assessment that fit the medium and the pedagogical style of the online environment. This paper investigates students ’ learning styles and learning strategies in taking online collaborative exams. Applying constructivist and collaborative learning theories, the collaborative examination features students ’ active participation in various phases of the exam process through small group activities online. Students ’ learning strategies, including deep learning and collaborative learning, are investigated using a 1 2 3 field quasi-experiment to compare the team-based collaborative online exam with the traditional in-class exam and with the participatory exam, where students participate in the online exam processes individually. Data analysis using results from 485 students indicates that collaborative examinations significantly reduced surface learning in exam study, enhanced interactions and the sense of an online learning community, and increased perceived learning. The results also suggest learning predispositions were significantly correlated with exam study strategies, and provide indications of their effects on learning strategies. Index Terms—Collaborative examinations, collaborative learning, deep learning, online learning, peer assessment, surface learning. With over three million university students taking online courses in the US alone in 2005, and with

Jia Shen; Starr Roxanne Hiltz; Michael Bieber


Harnessing Collaborative Annotations on Online Formative Assessments  

ERIC Educational Resources Information Center

This paper harnesses collaborative annotations by students as learning feedback on online formative assessments to improve the learning achievements of students. Through the developed Web platform, students can conduct formative assessments, collaboratively annotate, and review historical records in a convenient way, while teachers can generate…

Lin, Jian-Wei; Lai, Yuan-Cheng



Unauthorized Collaboration on Facebook: Threats and Responses  

E-print Network

Unauthorized Collaboration on Facebook: Threats and Responses Recent events at FSU have uncovered and collaboration. The Problem: When students, faculty, and staff join Facebook using a valid FSU email address this and believe it is affiliated with or endorsed by Florida State University. Facebook also allows students

McQuade, D. Tyler


Collaboration using roles. [in computer network security  

NASA Technical Reports Server (NTRS)

Segregation of roles into alternative accounts is a model which provides not only the ability to collaborate but also enables accurate accounting of resources consumed by collaborative projects, protects the resources and objects of such a project, and does not introduce new security vulnerabilities. The implementation presented here does not require users to remember additional passwords and provides a very simple consistent interface.

Bishop, Matt



Developing Collaborative Partnerships. Practice Application Brief.  

ERIC Educational Resources Information Center

Collaboration has become a pervasive strategy for systemic change in human services, education, government, and community agencies. Collaborative partnerships require a change in thinking and in operating. Such changes can be intimidating or threatening. In addition, other barriers must be overcome to make partnerships work. Examples of successful…

Kerka, Sandra


Collaborative Editor Environments for Player Programs  

E-print Network

testing to perfect the standardized collaborative toolset. Thesis Supervisor: Alvar Saenz Otero, PhD Title of individuals must work together to produce a software project that will compete against other teams' projects in a well defined test. Collaboration is crucial in the overall learning experience and in determining


Cross Course Collaboration in Undergraduate Sociology Programs  

ERIC Educational Resources Information Center

In this article, the authors describe a cross course collaborative research project designed to provide students with an opportunity to integrate aspects of sociological study that are typically addressed in a compartmentalized course by course manner. They used this approach on two separate occasions. The first involved collaboration between a…

Waltermaurer, Eve; Obach, Brian



Real-Time Organigraphs for Collaboration Awareness  

Microsoft Academic Search

Collaboration awareness, as extension to organization awareness, is knowing how organizations do work and achieve their goals. This knowledge moves on a scale from stated prescribed ways of acting (such as procedures and protocols) to informal channels of communication, teamwork and decision-making. Based on available static and dynamic data, standardized insights can be given about collaboration in emergency situations in

A. H. J. Oomes


Collaboration technology impaction on flightline maintenance  

Microsoft Academic Search

In flightline maintenance, collaboration is an important factor in the maintainerpsilas quest to complete a difficult or unusual repair. When the aircraft maintenance intuitive troubleshooting (AMIT) research project design team was evaluating collaboration technologies to incorporate within the AMIT job performance aid (JPA), three questions kept coming to mind. First, what is truly needed? Second, what will improve performance? Thirdly,

Christopher Burneka; Vaughan Whited; Christopher Curtis; Derrick Barthol



Virtual Collaboration Environment for Aircraft Design  

Microsoft Academic Search

This paper presents a virtual collaboration environment for aircraft design. The presented system, abbreviated as VCEAD, provides virtual prototyping and communication features for synchronous collaboration between geographically distributed designers. Concurrent design reviews on large scale objects, such as aircraft fuselage, are possible over distance due to the technological choices of the system. These include XML, VRML and Java based solutions

Markus D. Durstewitz; Bernhard Kiefner; Reimund Kueke; Heikki Putkonen; Pertti Repo; Tuomo Tuikka



Collaboration Infrastructure for a Virtual Residency in  

E-print Network

1 Collaboration Infrastructure for a Virtual Residency in Game Culture and Technology Robert Nideffer and Walt Scacchi Game Culture and Technology Laboratory And Institute for Software Research-to-face interaction #12;4 What the Collaboration Infrastructure isn't A 3D persistent, immersive virtual world or game

Scacchi, Walt


Developing and Enhancing International Collaborative Learning  

Microsoft Academic Search

This paper is concerned with the role of international collaboration in the learning and teaching of geography in higher education. The dual aims are to provide a brief and selective review of the nature and range of international collaboration and to contextualize such observations within the internationalization project. It is argued that despite the growing interest and literature concerned with

David Higgitt; Karl Donert; Mick Healey; Phil Klein; Michael Solem; Sue Vajoczki



Assessing Online Collaborative Learning: Process and Product.  

ERIC Educational Resources Information Center

Explores the role of assessment with respect to the processes and products of online collaborative study. Describes a qualitative case study of staff and student perspectives on two United Kingdom Open University courses, which have used online collaborative assessment, and discusses results which underline the importance of assessment in ensuring…

Macdonald, Janet



Collaborative Assessment: An Alternative to Psychological Evaluation  

Microsoft Academic Search

Collaborative assessment is a problem-solving approach that applies ideas from narrative therapy as an alternative to psychological evaluation. Collaborative assessment seeks to invite the people who are affected by a problem to work together against the problem, rather than against each other. The \\

Bruce J. Chalmer


Collaborative research for assessment for learning  

Microsoft Academic Search

This paper reports on a collaborative research study between three secondary teachers and two university researchers, initiated by the teachers, into the practice and impacts of assessment for learning in science, geography and history classes. The research provides insights into how teachers and researchers can collaborate to develop a research and practice agenda. The study illustrates the need for a

Beverley Cooper; Bronwen Cowie



Collaborative Virtual Gaming Worlds in Higher Education  

ERIC Educational Resources Information Center

There is growing interest in the use of virtual gaming worlds in education, supported by the increased use of multi-user virtual environments (MUVEs) and massively multi-player online role-playing games (MMORPGs) for collaborative learning. However, this paper argues that collaborative gaming worlds have been in use much longer and are much wider…

Whitton, Nicola; Hollins, Paul



Teaching Reading Comprehension through Collaborative Strategic Reading.  

ERIC Educational Resources Information Center

Provides an overview of collaborative strategic reading (CSR) as an approach to enhancing the reading-comprehension skills of students with learning disabilities. Procedures for implementing CSR with collaborative groups and techniques for teaching reading-comprehension skills are provided. The role of the teacher is described and sample teaching…

Vaughn, Sharon; Klingner, Janette Kettman



Service-oriented architecture for mobile collaboration  

Microsoft Academic Search

In a business environment, effective communication is crucial for the employeepsilas productivity and creativity. In this paper, we propose a SOA-based Collaboration Framework for mobile collaboration applications. This framework aims at promoting the business communication to a new level by means of architectural flexibility, lightweight design approach and a substantially increased availability of cooperation support. As part of our approach,

Yuri Natchetoi; Viktor Kaufman; Yuecel Karabulut



Electronic collaboration across organizational borders in the  

E-print Network

Electronic collaboration across organizational borders in the health care sector Design:252 Printed by NTNU-trykk #12;i Electronic collaboration across organizational borders in the health care borders in the health care sector. I have studied this problem from a sociotechnical1 point of view

Langseth, Helge


Training Synchronous Collaborative E-Learning  

ERIC Educational Resources Information Center

In order to promote cooperation among students who work separately on their computers at home, the University of Essen has developed training courses with experienced tutors to teach students the required sensitivity and practical skills for tele-collaboration in small groups. A core problem in synchronous collaborative e-learning with speech…

Bliesener, Thomas



Communication and Collaboration with Schools: Pediatricians' Perspectives  

ERIC Educational Resources Information Center

The multifaceted effect of chronic illness in children has created a need for pediatricians and school personnel, specifically school psychologists, to engage in collaborative problem solving. However, the extent to which this collaboration actually occurs in practice is unknown. A survey was developed and administered to a national sample of…

Bradley-Klug, Kathy L.; Sundman, Ashley N.; Nadeau, Joshua; Cunningham, Jennifer; Ogg, Julia



First Person Shooters as Collaborative Multiprocess Instruments  

E-print Network

the most played computer video games. They combine navigation, interaction and collaboration in 3D virtual). These games feature rich 3D virtual environments that can be used to facilitate control and visualization brought by these games for musical interaction. We present the Couacs, a collaborative multiprocess

Paris-Sud XI, Université de


How Collaborative Is Structural Family Therapy?  

ERIC Educational Resources Information Center

In response to the charge by "collaborative" therapies, such as solution focused and narrative, that structural family therapy is an aggressive, confrontational, and impositional approach, this investigation examines the role of therapist empathy in creating a collaborative partnership in structural family therapy. Twenty-four videotaped therapy…

Hammond, Ryan T.; Nichols, Michael P.



Mock Interdisciplinary Staffing: Educating for Interprofessional Collaboration  

ERIC Educational Resources Information Center

Training for interprofessional collaboration is important because professionals are increasingly required to work together in a coordinated and collaborative manner to meet the complex needs of clients. However, few published reports exist on interprofessional training for community counselors and marriage and family therapists. The authors…

Quealy-Berge, Diana; Caldwell, Karen



Suitability of Java for Virtual Collaboration  

Microsoft Academic Search

Multiuser virtual collaborative systems and applications are hard to be developed, due to the inherit complexity of their distributed nature and their big demands on 3D content modeling. The maintenance of collaborative virtual environments, integrated with naturally captured media streams like audio and video, is an even more complicated task. The purpose of this paper is to describe how to

Vasilios Darlagiannis; Ralf Ackermann; Abdulmotaleb El-Saddik; Nicolas Georganas; Ralf Steinmetz



Suitability of Java for Virtual Collaboration  

Microsoft Academic Search

Collaborative Virtual Environments (CVEs) support the co-existence of many users in shared virtual worlds, permitting a productive collaboration among them. Due to the inherit complexity of their distributed nature and their big demands on 3D content modeling, CVEs are hard to be developed. The maintenance of CVEs, integrated with naturally captured media streams like audio and video, is an even



Neurophysiologic Collaboration Patterns During Team Problem Solving  

Microsoft Academic Search

We have explored using neurophysiologic collaboration patterns as an approach for developing a deeper understanding of how teams collaborate when solving time-critical, complex real-world problems. Teams of three students solved substance abuse management simulations using IMMEX software while measures of mental workload (WL) and engagement (E) were generated by electroencephalography (EEG). Levels of high and low workload and engagement were

Ron Stevens; Trysha Galloway; Chris Berka; Marcia Sprang



Lessons Learned from the Collaborative Writing Process  

ERIC Educational Resources Information Center

We reflect on how to implement the instrumental aspect of collaborative writing in such a way that the developmental aspect of collaborative writing is maximally fostered, based on conditions necessary for socially constructed learning. We discuss four instrumental strategies that bolster mutual ownership of the writing and protect the social…

Bhavsar, Victoria; Ahn, Ruth



Collaborative Strategic Planning: Myth or Reality?  

ERIC Educational Resources Information Center

The concept and practice of strategic planning, while entrenched in educational institutions in the West, is just catching on in Kenya. While literature emphasizes the importance of collaborative strategic planning, it does not indicate the challenges presented by collaboratively engaging in strategic planning. This article reports on findings of…

Mbugua, Flora; Rarieya, Jane F. A.




E-print Network

social media use. My research focuses on collaborative technologies (including social computingCOLLABORATIVE AND SOCIAL COMPUTING Faculty: Mark Ackerman We are in the midst of unprecedented) and increasingly pervasive (ubiquitous) computing. My group is currently working on topics such as privacy; ways

Eustice, Ryan


Collaborative Interactions for Medical e-Diagnosis  

E-print Network

Collaborative Interactions for Medical e-Diagnosis D. Fuin, E. Garcia, H. Guyennet and J-C. Lapayre) gained solid expertise on medical e- diagnosis in the area of remote collaboration through continued research and findings. TeNeCi (Cooperative Teleneurology) is a European remote diagnosis project applied

Paris-Sud XI, Université de


Ten Simple Rules for a Successful Collaboration  

E-print Network

considered the study of living systems; many of us now think of it as the study of complex systems collaborators as you would want to be treated yourself--empathy is key. Rule 1: Do Not Be Lured into Just Any of money and/or if it is a collaboration with someone more established and well-known. It is easier to say


3D Worlds for Collaborative Work  

E-print Network

important part of collaboration, and therefore one of the major benefits of traveling as a solution to facilitate remote working, such as video conferencing, Second Life meetings, wiki pages, blogs, etc to develop the virtual world needed for this experiment, from general game engines to collaboration

Emmerich, Michael


The affordances of media spaces for collaboration  

Microsoft Academic Search

In this paper, I discuss the affordances offered by media spaces for collaboration, contrasting their properties with those of the everyday medium and exploring the implications for perception and interaction. Collaboration is situated in a physical environment which supports or constrains the various forms social interactions might take. An analysis of the affordances of the environment - the properties that

William W. Gaver



Doing Collaborative Learning (CL) - CL Structures  

NSDL National Science Digital Library

This site describes a variety of commonly used collaborative learning structures. These collaborative learning structures are frameworks and not specific activities. They provide a general structure that can be adapted to many situations, content, and disciplines. Links to a variety of related topics are included.

Research, Wisconsin C.; Wisconsin-Madison, University O.


Doing Collaborative Learning (CL) - Starting Out  

NSDL National Science Digital Library

This website presents a guide to planning, preparing, and structuring a collaborative learning exercise, striking a balance between structure and independence. In the traditional lecture setting, the authority, control, and course structures are well defined. Collaborative learning techniques not only change the teaching and learning styles, but also the authority and control structure.

Research, Wisconsin C.; Wisconsin-Madison, University O.


The evolution of research on collaborative learning  

Microsoft Academic Search

For many years, theories of collaborative learning tended to focus on how individuals function in a group. More recently, the focus has shifted so that the group itself has become the unit of analysis. In terms of empirical research, the initial goal was to establish whether and under what circumstances collaborative learning was more effective than learning alone. Researchers controlled

P. Dillenbourg; M. Baker; A. Blaye; C. O'Malley



Teaching Primary & Secondary Sources: An Earthshaking Collaboration  

ERIC Educational Resources Information Center

Does history have to be boring and dry? Not if a person takes the familiar and adds an earthshaking twist! To begin the collaborative process, work with a willing teacher. This article talks about a teaching collaboration between the author as a library media specialist and Beth who was interested in literature circle titles for her 6th grade…

Gustafson, Chris



Collaborative technologies for children with autism  

Microsoft Academic Search

The COSPATIAL (Communication and social participation: collaborative technologies for interaction and learning) project explores how we can develop effective and useful educational technologies in the form of shared active surfaces (SASs) and collaborative virtual environments (CVEs) to support the enhancement of social competence skills for children with autism spectrum conditions (ASC). This paper presents a description of the COSPATIAL suite

Laura Millen; Tessa Hawkins; Sue Cobb; Massimo Zancanaro; Tony Glover; Patrice L. Weiss; Eynat Gal



Messy Collaboration: Learning from a Learning Study  

ERIC Educational Resources Information Center

Messy collaboration refers to complexity, unpredictability and management dilemmas when educators work together. Such messiness was evident in a Hong Kong English Learning Study, a structured cyclical process in which teachers and researcher-participants from a teacher education institution work collaboratively on effective student learning. This…

Adamson, Bob; Walker, Elizabeth



Putting together a scientific team: collaborative science.  


One of the most enjoyable parts of a science career is collaborative team experiences and developing life-long social networks. When the hypothesis being tested requires innovative efforts greater than any single laboratory, collaboration becomes an essential component for success - everyone is a stakeholder and trust is the driving force. PMID:24894627

Adams, L Garry



Distributed Collaborations using Network Mobile Agents ?  

E-print Network

on behalf of a user. The main advantages of the mobile agent paradigm lie in its ability to move client code, there are several motivations for exploring the use of mo­ bile agents in building distributed collaborations objects, coordination operations, roles of various people involved in a collaboration, and security poli

Tripathi, Anand


Clinical Impact of Indirect Markers of Renal Function in Elderly Patients With Hip Fracture  

PubMed Central

Introduction: There are risk factors associated with mortality in patients older than 70 years with hip fracture, including kidney function. However, indirect formulas to calculate glomerular filtration rate are not validated in patients older than 70 years. We analyzed whether the formula hematocrit, urea, and gender (HUGE) can be used as a prognostic factor. Material and Methods: A retrospective cohort study of 88 patients older than 70 years with a diagnosis of hip fracture. At admission, clinical and biochemical parameters were measured and glomerular filtration rate by Cockcroft-Gault, Modification Of Diet In Renal Disease (MDRD), Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI), and HUGE value. Accuracy to assess long-term mortality was analyzed with receiver–operating curve analysis. Cox regression analysis was performed to identify risk factor for mortality. Results: Sample included 88 patients; overall mortality was 13.63%, 17.85%, 28.57%, and 75.85% at 6 months, 1, 2, and 3 years, respectively. There was no significant difference in glomerular filtration rate by different formulas, contrary to HUGE, with higher values in the mortality group (1.83 ± 6.38 vs ?2.61 ± 2.70, P = .0001). Survival was lower in patients with higher HUGE values (22.7 months, 95% confidence interval [CI] 16.1-29.5 vs 32.9 months, 95% CI 30.2-35.7; P ? .001). In the Cox regression analysis, a negative HUGE value is associated with lower mortality (hazards ratio = 0.238; 95% CI 0.568-0.099). Conclusion: The HUGE formula is an independent risk factor for mortality in elderly patients with hip fracture, but not the glomerular filtration rate determined by Cockcroft-Gault, MDRD, and CKD-EPI.

Tovar-Rivera, Emanuel; Becerra-Laparra, Ivonne K.; Chavez-Tapia, Norberto C.



Intravenous colistin in a patient with serious burns and borderline syndrome: the benefits of therapeutic drug monitoring.  


Colistin is a decades-old drug that fell out of favour due to its nephrotoxicity. Today, colistin is experiencing a renaissance as a treatment against multiresistant Gram-negative bacteria such as Pseudomonas and Acinetobacter in critically ill patients. The optimal dosing of colistin for most infections is unknown. Here we present the intravenous dosing, optimised by therapeutic drug monitoring (TDM), of a borderline patient with severe burns and a consecutive transfemoral amputation. A 32-year-old woman with severe burns (35% total body surface area) and sepsis exhibited normal serum creatinine (SCr) concentrations at the beginning of her intensive care unit (ICU) stay, but over the course of her ICU stay her SCr increased to 100 ?mol/L. With the colistin standard dose of 3 × 3 million units (MU) colistin/day after a loading dose of 9 MU, she failed to achieve effective plasma concentrations. The estimated glomerular filtration rate (eGFR) via CKD-EPI (Chronic Kidney Disease Epidemiology Collaboration) revealed GFRs between 180 mL/min and 63 mL/min after correcting for body surface. The patient required a high daily dosage of colistin (3 × 6 MU) that exceeded the approved maximum dose. Most clinicians rely heavily on SCr concentrations as the primary biochemical marker of GFR. At most, the CKD-EPI formula is helpful in determining creatinine clearance. The pharmacokinetics of colistin are currently poorly understood. TDM of colistin methanesulfonate and colistin may represent an invaluable approach to optimise colistin drug exposure in ICU patients with fluctuating renal clearance. PMID:24011987

Bode-Böger, Stefanie M; Schopp, Brigitte; Tröger, Uwe; Martens-Lobenhoffer, Jens; Kalousis, Konstantin; Mailänder, Peter



Information Equation of State  

E-print Network

Landauer's principle is applied to information in the universe. Once stars began forming, the increasing proportion of matter at high stellar temperatures compensated for the expanding universe to provide a near constant information energy density. The information equation of state was close to the dark energy value, w = -1, for a wide range of redshifts, 10> z >0.8, over one half of cosmic time. A reasonable universe information bit content of only 10^87 bits is sufficient for information energy to account for all dark energy. A time varying equation of state with a direct link between dark energy and matter, and linked to star formation in particular, is clearly relevant to the cosmic coincidence problem.In answering the "Why now?" question we wonder "What next?" as we expect the information equation of state to tend towards w = 0 in the future.

Paul Gough



Lindblad rate equations  

E-print Network

In this paper we derive an extra class of non-Markovian master equations where the system state is written as a sum of auxiliary matrixes whose evolution involve Lindblad contributions with local coupling between all of them, resembling the structure of a classical rate equation. The system dynamics may develops strong non-local effects such as the dependence of the stationary properties with the system initialization. These equations are derived from alternative microscopic interactions, such as complex environments described in a generalized Born-Markov approximation and tripartite system-environment interactions, where extra unobserved degrees of freedom mediates the entanglement between the system and a Markovian reservoir. Conditions that guarantees the completely positive condition of the solution map are found. Quantum stochastic processes that recover the system dynamics in average are formulated. We exemplify our results by analyzing the dynamical action of non-trivial structured dephasing and depola...

Budini, A A



Lindblad rate equations  

E-print Network

In this paper we derive an extra class of non-Markovian master equations where the system state is written as a sum of auxiliary matrixes whose evolution involve Lindblad contributions with local coupling between all of them, resembling the structure of a classical rate equation. The system dynamics may develops strong non-local effects such as the dependence of the stationary properties with the system initialization. These equations are derived from alternative microscopic interactions, such as complex environments described in a generalized Born-Markov approximation and tripartite system-environment interactions, where extra unobserved degrees of freedom mediates the entanglement between the system and a Markovian reservoir. Conditions that guarantees the completely positive condition of the solution map are found. Quantum stochastic processes that recover the system dynamics in average are formulated. We exemplify our results by analyzing the dynamical action of non-trivial structured dephasing and depolarizing reservoirs over a single qubit.

Adrian A. Budini



Inverse Euler equations  

NASA Astrophysics Data System (ADS)

Following previous work by Keller [2], that is extended to compressible flow, the general time-independent Euler equations for inviscid fluid flow are first written in a perfectly antisymmetric form, using a pair of stream functions as the dependent variables. In a second step the equations are written in an inverse form, using the two stream functions and the natural coordinate as independent variables. As a special case the Bragg-Hawthorne equation for axisymmetric flow is first extended to compressible flow and also transformed to its inverse form. The main advantage of using these inverse equations is associated with the possibilities of using static pressure distributions, Mach number distributions, geometric constraints, etc., or any combination of geometric constraints and specifications of physical quantities to define the boundary conditions. In contrast to conventional inverse methods, that are based on iterative approximations to a desired pressure distribution along the surface of a flow device, for example, the use of inverse Euler equations offers the possibility to arrive at the solution for any kind of boundary conditions in a single step. Furthermore, there is no need for complicated grid generation procedures, because the domain of definition in inverse space is typically a cube with Cartesian coordinates. In the original space, the surfaces on which the natural coordinate is constant are orthogonal to the streamlines. As a consequence, the computation time can be kept small and the accuracy is remarkably high. This semi-orthogonal curvilinear grid is generated automatically together with the solution. The density of grid lines is automatically getting large in domains where gradients are large. Possible difficulties with using inverse Euler equations are mainly related to the topology of the flow field. The transform to inverse coordinates must correspond to a one-to-one mapping. Hence, if the domain of definition is not simply connected it must be cut suitably to obtain piecewise domains for which one-to-one mappings exist.

Keller, J. J.


Fredholm resolvents, Wiener-Hopf equations, and Riccati differential equations  

Microsoft Academic Search

We shall show that the solution of Fredholm equations with symmetric kernels of a certain type can be reduced to the solution of a related Wiener-Hopf integral equation. A least-squares filtering problem is associated with this equation. When the kernel has a separable form, this related problem suggests that the solution can be obtained via a matrix Riccati differential equation,




Evaluating Equating Results: Percent Relative Error for Chained Kernel Equating  

ERIC Educational Resources Information Center

This article presents a method for evaluating equating results. Within the kernel equating framework, the percent relative error (PRE) for chained equipercentile equating was computed under the nonequivalent groups with anchor test (NEAT) design. The method was applied to two data sets to obtain the PRE, which can be used to measure equating

Jiang, Yanlin; von Davier, Alina A.; Chen, Haiwen



J. Differential Equations 195 (2003) 284312 Generalized MHD equations  

E-print Network

J. Differential Equations 195 (2003) 284­312 Generalized MHD equations Jiahong Wu� Department September 16, 2002; revised June 4, 2003 Abstract Solutions of the d-dimensional generalized MHD (GMHD and Z ¼ 0; the GMHD equations reduce to the ideal MHD equations. It is shown here that the ideal MHD

Wu, Jiahong


Comparison of Kernel Equating and Item Response Theory Equating Methods  

ERIC Educational Resources Information Center

The kernel method of test equating is a unified approach to test equating with some advantages over traditional equating methods. Therefore, it is important to evaluate in a comprehensive way the usefulness and appropriateness of the Kernel equating (KE) method, as well as its advantages and disadvantages compared with several popular item…

Meng, Yu



Collaborative PLM - The Next Generation AKA Cars on Mars  

NASA Technical Reports Server (NTRS)

In this slide presentation the importance of collaboration in developing the next systems for space exploration is stressed. The mechanism of this collaboration are reviewed, and particular emphasis is given to our planned exploration of Mars and how this will require a great deal of collaboration. A system architecture for this collaboration is shown and the diagram for the collaborative environment is conceptualized.

Soderstrom, Tom; Stefanini, Mike



Activity Theoretical Framework for Wiki-Based Collaborative Content Creation  

Microsoft Academic Search

Most recently, the use of collaboration element within information behavior research namely Collaborative Information Behavior (CIB) has been increasing. In addition, the success of wiki-based, large-scale, open collaborative content creation systems such as Wikipedia has aroused increasing interests of studies on their collaborative model. In contrast to previous related work, this paper focuses on an integrated theoretical framework of collaborative

Weiwei Zhang; Xiaodong Zhu



The QuarkNet Collaboration  

NASA Astrophysics Data System (ADS)

QuarkNet is a long-term high school education project, supported by NSF and DOE and carried out by a collaboration of university and laboratory research groups. These research groups are part of major international particle physics experiments, including those at CERN in Switzerland, Fermilab in Illinois, and SLAC in California. Goals and Objectives: A major goal is to engage students and teachers in authentic scientific research; they gain a first-hand understanding of research and its application in the inquiry method of learning. Teachers enhance their content knowledge, increase their abilities to solve science-related problems, engage students in scientific inquiry, and develop responsibility for their own professional development. Students learn fundamental physics and are motivated by current research questions as they analyze real data. A second goal is to engage particle physicists with current issues in science education, including their understanding of the National Science Education Standards and local science education needs and what constitutes age-appropriate content. Project Design: Working with physicists nationwide, we have established a project framework with three program areas-teacher research experience, teacher development programs, and online resources and inquiry-based activities. Eight-week research appointments allow teachers to experience scientific research first-hand. In teacher institutes the next summer these teachers and scientists lead a group of teachers through a short research scenario lasting two to three weeks and assist them in creating similar scenarios for their students. When fully implemented QuarkNet will support centers associated with 60 particle physics research groups at universities and laboratories in the U. S. The QuarkNet website provides: - Experimental data for use in inquiry-based activities. - Opportunities for communication and collaboration among physicists, teachers and students. - A place for students to publish and share their ideas. - Resources including background information, simulations, ideas for data analysis, inquiry activities, etc. Future Scope: Many students are engaged in research in their schools, but in the second five years, we will add a student component to the summer research experience.

Erzberger, A.



Fluctuation between Fasting and 2-H Postload Glucose State Is Associated with Glomerular Hyperfiltration in Newly Diagnosed Diabetes Patients with HbA1c < 7%  

PubMed Central

Objective To investigate whether fluctuations between the fasting and 2-h postload glucose ([2-hPBG]-fasting blood glucose [FBG]) states are associated with glomerular hyperfiltration (GHF) in middle-aged and elderly Chinese patients with newly diagnosed diabetes. Design and Methods In this study, we included 679 newly diagnosed diabetes patients who were ?40 years old. All the subjects were divided into two groups; those with HbA1c<7% and ?7%. The Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation was used to estimate the glomerular filtration rate (GFR). GHF was defined as an eGFR ? the 90th percentile. First, a multiple linear regression analysis was used to estimate the association of 2-hPBG-FBG with eGFR. Then, a generalized additive model was used to explore the possible nonlinear relationship between 2-hPBG-FBG and eGFR. Next, the 2-hPBG-FBG values were divided into four groups as follows: 0–36, 36–72, 72–108 and ?108 mg/dl. Finally, a multiple logistic regression analysis was used to investigate the association of 2-hPBG-FBG with the risk of GHF. Results For the group with HbA1c<7%, the eGFR and the percentage of GHF were significantly higher compared with the group with HbA1c?7%. After adjusting for age, gender, body mass index (BMI), systolic blood pressure (BP), diastolic BP, fasting insulin, cholesterol, triglycerides, smoking, drinking and glycated hemoglobin (HbA1c), 2-hPBG-FBG was significantly associated with increased eGFR and an increased risk of GHF (the GHF risk increased by 64.9% for every 36.0 mg/dl [2.0 mmol/L] 2-hPBG-FBG increase) only in those patients with HbA1c<7%. Additionally, 2-hPBG-FBG and eGFR showed a nonlinear association (P<0.001). Conclusions Increased fluctuations between the fasting and 2-h postload glucose states are closely associated with increased eGFR and an increased risk of GHF in newly diagnosed diabetes patients with HbA1c<7%. PMID:25360521

Hou, Xinguo; Wang, Chuan; Wang, Shaoyuan; Yang, Weifang; Ma, Zeqiang; Wang, Yulian; Li, Chengqiao; Li, Mei; Zhang, Xiuping; Zhao, Xiangmin; Sun, Yu; Song, Jun; Lin, Peng; Liang, Kai; Gong, Lei; Wang, Meijian; Liu, Fuqiang; Li, Wenjuan; Yan, Fei; Yang, Junpeng; Wang, Lingshu; Tian, Meng; Liu, Jidong; Zhao, Ruxing; Chen, Shihong; Chen, Li



Quasi Geostrophic Vorticity Equation  

NSDL National Science Digital Library

This learning object/widget is designed for upper-level undergraduates or forecaster interns who want to apply their knowledge of the Quasi-geostrophic Vorticity Equation to forecast situations. The interactivity helps users see how each variable interacts within the equation and shows data for different phase shifts of 500hPa and 1000hPa heights. Instructors can use this learning object with their own question sets as well to build more understanding and application into their dynamics/synoptic courses.




Gas Dynamics Equations: Computation  

E-print Network

Shock waves, vorticity waves, and entropy waves are fundamental discontinuity waves in nature and arise in supersonic or transonic gas flow, or from a very sudden release (explosion) of chemical, nuclear, electrical, radiation, or mechanical energy in a limited space. Tracking these discontinuities and their interactions, especially when and where new waves arise and interact in the motion of gases, is one of the main motivations for numerical computation for the gas dynamics equations. In this paper, we discuss some historic and recent developments, as well as mathematical challenges, in designing and formulating efficient numerical methods and algorithms to compute weak entropy solutions for the Euler equations for gas dynamics.

Chen, Gui-Qiang G



Graphing Linear Equations  

NSDL National Science Digital Library

We graph equations to find where the line lies on the graph and thus are able to use this information to see or predict where it will cross at any given point. If you were absent or need a review you can watch the tutorial videos in our Holt on line text or you can read through this site. graphing equations tutorial If you need a review of the quadrants and points of the coordinate plane then work through these activities. Review of coordinate points and graphing. Please work through the activities ...

Arnold, Mrs.



Quasi Geostrophic Omega Equation  

NSDL National Science Digital Library

This learning object/widget is designed for upper-level undergraduates or forecaster interns who want to apply their knowledge of the Quasi-geostrophic Omega Equation to forecast situations. The interactivity helps users see how each variable interacts within the equation and shows data for different phase shifts of 500hPa and 1000hPa heights. Instructors can use this learning object with their own question sets as well to build more understanding and application into their dynamics/synoptic course.




Multicenter breast cancer collaborative registry.  


The Breast Cancer Collaborative Registry (BCCR) is a multicenter web-based system that efficiently collects and manages a variety of data on breast cancer (BC) patients and BC survivors. This registry is designed as a multi-tier web application that utilizes Java Servlet/JSP technology and has an Oracle 11g database as a back-end. The BCCR questionnaire has accommodated standards accepted in breast cancer research and healthcare. By harmonizing the controlled vocabulary with the NCI Thesaurus (NCIt) or Systematized Nomenclature of Medicine-Clinical Terms (SNOMED-CT), the BCCR provides a standardized approach to data collection and reporting. The BCCR has been recently certified by the National Cancer Institute's Center for Biomedical Informatics and Information Technology (NCI CBIIT) as a cancer Biomedical Informatics Grid (caBIG(®)) Bronze Compatible product.The BCCR is aimed at facilitating rapid and uniform collection of critical information and biological samples to be used in developing diagnostic, prevention, treatment, and survivorship strategies against breast cancer. Currently, seven cancer institutions are participating in the BCCR that contains data on almost 900 subjects (BC patients and survivors, as well as individuals at high risk of getting BC). PMID:21918596

Sherman, Simon; Shats, Oleg; Fleissner, Elizabeth; Bascom, George; Yiee, Kevin; Copur, Mehmet; Crow, Kate; Rooney, James; Mateen, Zubeena; Ketcham, Marsha A; Feng, Jianmin; Sherman, Alexander; Gleason, Michael; Kinarsky, Leo; Silva-Lopez, Edibaldo; Edney, James; Reed, Elizabeth; Berger, Ann; Cowan, Kenneth



Multicenter Breast Cancer Collaborative Registry  

PubMed Central

The Breast Cancer Collaborative Registry (BCCR) is a multicenter web-based system that efficiently collects and manages a variety of data on breast cancer (BC) patients and BC survivors. This registry is designed as a multi-tier web application that utilizes Java Servlet/JSP technology and has an Oracle 11g database as a back-end. The BCCR questionnaire has accommodated standards accepted in breast cancer research and healthcare. By harmonizing the controlled vocabulary with the NCI Thesaurus (NCIt) or Systematized Nomenclature of Medicine-Clinical Terms (SNOMED-CT), the BCCR provides a standardized approach to data collection and reporting. The BCCR has been recently certified by the National Cancer Institute’s Center for Biomedical Informatics and Information Technology (NCI CBIIT) as a cancer Biomedical Informatics Grid (caBIG®) Bronze Compatible product. The BCCR is aimed at facilitating rapid and uniform collection of critical information and biological samples to be used in developing diagnostic, prevention, treatment, and survivorship strategies against breast cancer. Currently, seven cancer institutions are participating in the BCCR that contains data on almost 900 subjects (BC patients and survivors, as well as individuals at high risk of getting BC). PMID:21918596

Sherman, Simon; Shats, Oleg; Fleissner, Elizabeth; Bascom, George; Yiee, Kevin; Copur, Mehmet; Crow, Kate; Rooney, James; Mateen, Zubeena; Ketcham, Marsha A.; Feng, Jianmin; Sherman, Alexander; Gleason, Michael; Kinarsky, Leo; Silva-Lopez, Edibaldo; Edney, James; Reed, Elizabeth; Berger, Ann; Cowan, Kenneth



Collaboration in Complex Medical Systems  

NASA Technical Reports Server (NTRS)

Improving our understanding of collaborative work in complex environments has the potential for developing effective supporting technologies, personnel training paradigms, and design principles for multi-crew workplaces. USing a sophisticated audio-video-data acquisition system and a corresponding analysis system, the researchers at University of Maryland have been able to study in detail team performance during real trauma patient resuscitation. The first study reported here was on coordination mechanisms and on characteristics of coordination breakdowns. One of the key findings was that implicit communications were an important coordination mechanism (e.g. through the use of shared workspace and event space). The second study was on the sources of uncertainty during resuscitation. Although incoming trauma patients' status is inherently uncertain, the findings suggest that much of the uncertainty felt by care providers was related to communication and coordination. These two studies demonstrate the value of and need for creating a real-life laboratory for studying team performance with the use of comprehensive and integrated data acquisition and analysis tools.

Xiao, Yan; Mankenzie, Colin F.



Regional Interagency Disaster Response Collaboration  

NASA Astrophysics Data System (ADS)

In affiliation with the "Great Worden Quake II" (GWQII) disaster preparedness exercise, the NASA Ames Research Center, Moffett Field California, the Air Force National Guard (ANG) 129th Rescue Wing, Moffett Field, California, and the Bay Area Automated Mapping Association,led by the IT group for the City of Walnut Creek, California, will engage in a technology transfer demonstration utilizing the collaborative environment developed for NASA's very successful wildfire mapping campaigns during the years 2006-2008. The aircraft platform will be the ANG C-130, a viable candidate to substitute for the Ikana UAV, which cannot fly from Ames because of FAA restrictions on UAV flights over populated areas. In this technology transfer demonstration, we will: (1) Prove, document and train Regional Fire departments how to link and use NASA real-time data with existing software (ESRI, IRRIS, etc). (2) Demonstrate how to access and use this data as a bridge between the real-time (3) Refine the questions and capabilities that would be involved and developed with this type of real-time data available This paper describes this exercise.

Moe, K.; Sullivan, D.; Butow, S.; Beilin, P.



The unified quantum wave equation  

Microsoft Academic Search

The quaterionic formulation of quantum mechanics yields the unified quantum wave equation (UQWEs). From these equations, Dirac, Klein - Gordon and Schrodinger equations can be derived. While the UQWEs represent a matter wave (de Broglie), the Maxwell equations represent a transverse wave (field). Owing to UQWEs, the spin-0 and spin-1\\/2 particle are described by a wavepacket consisting of waves traveling

Arbab I. Arbab



Exploring Linear Equations  

NSDL National Science Digital Library

This multimedia mathematics resource shows how math is used at the Calgary Zoo to calculate how much it costs to feed the animals. An interactive activity allows students to change variables in linear equations to create unique ways of obtaining the same solution. A print activity is provided.



Structural Equation Model Trees  

ERIC Educational Resources Information Center

In the behavioral and social sciences, structural equation models (SEMs) have become widely accepted as a modeling tool for the relation between latent and observed variables. SEMs can be seen as a unification of several multivariate analysis techniques. SEM Trees combine the strengths of SEMs and the decision tree paradigm by building tree…

Brandmaier, Andreas M.; von Oertzen, Timo; McArdle, John J.; Lindenberger, Ulman



Fixing Einstein's equations  

E-print Network

Einstein's equations for general relativity, when viewed as a dynamical system for evolving initial data, have a serious flaw: they cannot be proven to be well-posed (except in special coordinates). That is, they do not produce unique solutions that depend smoothly on the initial data. To remedy this failing, there has been widespread interest recently in reformulating Einstein's theory as a hyperbolic system of differential equations. The physical and geometrical content of the original theory remain unchanged, but dynamical evolution is made sound. Here we present a new hyperbolic formulation in terms of $g_{ij}$, $K_{ij}$, and $\\bGam_{kij}$ that is strikingly close to the space-plus-time (``3+1'') form of Einstein's original equations. Indeed, the familiarity of its constituents make the existence of this formulation all the more unexpected. This is the most economical first-order symmetrizable hyperbolic formulation presently known to us that has only physical characteristic speeds, either zero or the speed of light, for all (non-matter) variables. This system clarifies the relationships between Einstein's original equations and the Einstein-Ricci and Frittelli-Reula hyperbolic formulations of general relativity and establishes links to other hyperbolic formulations.

Arlen Anderson; James W. York, Jr



System of Linear Equations  

NSDL National Science Digital Library

To futher our knowledge of science and engineering, we try to formulate mathematical models that quantify behaviors. We trust these models only when they predict observed behavior. Normally this requires the solution of the unknown quantities in our model when written in a system of equations.

Baker, Greg


Applications of Differential Equations  

E-print Network

electrical circuits, projectile motion and Newton's law of cooling recognise and solve second-order ordinary's law of cooling In section 19.1 we introduced Newton's law of cooling. The model equation was d dt = -k several techniques for solving commonly-occurring first- order and second-order ordinary differential

Vickers, James


Student-Generated Equations  

ERIC Educational Resources Information Center

We are frequently told that Hong Kong has a model system for learning mathematics. In this article Daniela Vasile notes one short-coming in that the pupils are not taught to problem-solve. She begins with a new class by asking them to write down the craziest equation they can come up with and bases her whole lesson, and the following homework,…

Vasile, Daniela



ARTEMIS: a collaborative framework for health care.  


Patient centered healthcare delivery is an inherently collaborative process. This involves a wide range of individuals and organizations with diverse perspectives: primary care physicians, hospital administrators, labs, clinics, and insurance. The key to cost reduction and quality improvement in health care is effective management of this collaborative process. The use of multi-media collaboration technology can facilitate timely delivery of patient care and reduce cost at the same time. During the last five years, the Concurrent Engineering Research Center (CERC), under the sponsorship of DARPA (Defense Advanced Research Projects Agency, recently renamed ARPA) developed a number of generic key subsystems of a comprehensive collaboration environment. These subsystems are intended to overcome the barriers that inhibit the collaborative process. Three subsystems developed under this program include: MONET (Meeting On the Net)--to provide consultation over a computer network, ISS (Information Sharing Server)--to provide access to multi-media information, and PCB (Project Coordination Board)--to better coordinate focussed activities. These systems have been integrated into an open environment to enable collaborative processes. This environment is being used to create a wide-area (geographically distributed) research testbed under DARPA sponsorship, ARTEMIS (Advance Research Testbed for Medical Informatics) to explore the collaborative health care processes. We believe this technology will play a key role in the current national thrust to reengineer the present health-care delivery system. PMID:8130536

Reddy, R; Jagannathan, V; Srinivas, K; Karinthi, R; Reddy, S M; Gollapudy, C; Friedman, S



Direct Collaboration Between Amateur and Professional Astronomers  

NASA Astrophysics Data System (ADS)

The authors (Boltwood an amateur, Sadun a professional) have successfully collaborated for the photometry of Blazars and subsequent analysis. Both have been in other collaborations. These experiences are drawn upon to give advice to future collaborators. Collaborations are usually formed because each party has (or can provide) something that the others don't have. The amateur and the professional usually have different motivations. Some of these may be inappropriate and must be properly managed. For example, the taking excess credit by the professional, or the expectation of too much "fun" by the amateur. Mutual respect and trust are essential, but are often not present on either side. Both sides must be sure that they can hold up their ends of the bargain. The amateur especially needs to understand the large amount of work and the high quality needed. He needs to do what is needed for the project, and do it very well. The most crucial time is at the formation of the collaboration. Care must be taken on both sides to learn how to run a collaboration, and to be sure that it will work. Clear agreements are needed. Possible mistaken assumptions on both sides must be identified. Nut and bolts problems such as money, library access, conference access, and equipment, software, and file compatibility must be recognized and sorted out. Successful collaborations are certainly possible, but all parties need to understand what is involved to avoid conflict.

Boltwood, P.; Sadun, A.



Collaborative Research Agreements: Getting Through the Legal Hurdles  

NSDL National Science Digital Library

A powerpoint presentation file from the EB 2007 Careers Symposium - Guide for Successful Collaboration: From the Handshake to the Collaborative Research Agreement a presentation on the ethics and legal issues involved in a collaboration.

Jay B Winchester (Judge Advocate, US Army Medical Research and Material Command)



Collaborative Research Agreements: Getting Through the Legal Hurdles  

NSDL National Science Digital Library

A recorded presentation from the EB 2007 Careers Symposium - Guide for Successful Collaboration: From the Handshake to the Collaborative Research Agreement a presentation on the ethics and legal issues involved in a collaboration.

Jay B Winchester (Judge Advocate, US Army Medical Research and Material Command)




E-print Network

Hunting the Quark Gluon Plasma ASSESSMENTS BY THE EXPERIMENTAL COLLABORATIONS Relativistic Heavy in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC: Experimental Evaluation by the PHENIX Collaboration .................... 33 The PHOBOS Perspective


Assisting Instructional Assessment of Undergraduate Collaborative Wiki and SVN Activities  

E-print Network

Assisting Instructional Assessment of Undergraduate Collaborative Wiki and SVN Activities Jihie Kim examine the collaborative performance of undergraduate engineering students who used shared project collaboration. We present an initial implementation of TeamAnalytics, an instructional tool that facilitates

Kim, Jihie


Research Councils UK Joint Vision For Collaborative Training  

E-print Network

Research Councils UK Joint Vision For Collaborative Training Objectives: Research Council Collaborative Training will provide doctoral students with a first- rate, challenging research training organisations in the private, public and civil society sectors. Benefits to the student ­ Collaborative Training

Berzins, M.


Interpersonal Privacy Management in Distributed Collaboration: Situational Characteristics and  

E-print Network

Interpersonal Privacy Management in Distributed Collaboration: Situational Characteristics} Abstract. To understand how collaborators reconcile the often conflicting needs of awareness and privacy. Keywords: Privacy, Awareness, Distributed collaboration, Privacy management. 1 Introduction High

Patil, Sameer


Flexible Conflict Detection and Management In Collaborative Applications  

E-print Network

Flexible Conflict Detection and Management In Collaborative Applications W. Keith Edwards Xerox, collaborative infrastructure, conflict management, Timewarp. INTRODUCTION Most collaborative applications--consistency will be maintained and managed. More concretely, this work deals with the issue of conflicts

Edwards, Keith


Interpersonal Privacy Management in Distributed Collaboration: Situational Characteristics and  

E-print Network

Interpersonal Privacy Management in Distributed Collaboration: Situational Characteristics} Abstract. To understand how collaborators reconcile the often conflicting needs of awareness and privacy. Keywords: Privacy, Awareness, Distributed collaboration, Privacy management. 1 Introduction High

Kobsa, Alfred


Wave Equations on a Hyperplane  

Microsoft Academic Search

The Dirac equation, the Weaver-Hammer-Good wave equations, and the Weinberg wave equations are written in a manifestly covariant form in terms of hyperplane parameters according to Fleming's hyperplane formalism. A Fody-Wouthuysen-type wave equation is developed for the Weinberg theory and it, along with the usual Foldy-Wouthuysen wave equation and transformation, is also written in a manifestly covariant form for all

C. L. Hammer; S. C. McDonald; D. L. Pursey



Geometric Solutions to Algebraic Equations  

E-print Network

A method to the explict solutions of general systems of algebraic equations is presented via the metric form of affiliated K\\"ahler manifolds. The solutions to these systems arise from sets of geodesic second order non-linear differential equations. Algebraic equations in various fields such as integers and rational numbers, as well as transcendental equations, are amenable. The case of Fermat's set of equations is a subset.

Gordon Chalmers



Lesson 3: Graphs and Equations  

NSDL National Science Digital Library

This lesson begins with linear equations and inequalities in 1 variable and then moves on to linear equations in 2 variables. Graphs of linear equations in 2 variables are introduced as "a picture of all its solutions." Exercises targeting the links between equations, solutions, points, and graphs follows, with the final activities focusing on use of a graphing calculator to graph equations and find coordinates. There aren't any application problems in this lesson.



Brownian motion from Boltzmann's equation.  

NASA Technical Reports Server (NTRS)

Two apparently disparate lines of inquiry in kinetic theory are shown to be equivalent: (1) Brownian motion as treated by the (stochastic) Langevin equation and Fokker-Planck equation; and (2) Boltzmann's equation. The method is to derive the kinetic equation for Brownian motion from the Boltzmann equation for a two-component neutral gas by a simultaneous expansion in the density and mass ratios.

Montgomery, D.



National Transport Code Collaboration (NTCC)  

NASA Astrophysics Data System (ADS)

Progress continues toward achieving NTCC goals, which include the development of -- a library of modules which satisfy clearly defined standards, a framework using modern computer languages to write transport codes, a Web-invocable data server and demonstration code, and an education program to utilize modern computational tools. The development of a flexible framework (using five programming languages -- FORTRAN, C++, PYTHON, CORBA and JAVA, and modern software engineering) allows the design of new customizable, user-friendly, easily maintained transport codes that can address major physics issues facing the fusion program. The demo code runs on up to three computers simultaneously; the GUI Client runs on a local computer, the Physics server advances the transport equations, and the Data server accesses experimental data. The evolutions of plasma discharges using different transport models from the module library are compared using the demo code.

Kritz, A. H.; Bateman, G.; Kinsey, J.; Wiley, J.; Cary, J. R.; Luetkemeyer, K. G.; Cohen, R.; Jong, R.; Lodestro, L.; Yang, T. B.; Houlberg, W.; Greenwood, D.; McCune, D.; Mikkelsen, D.; Pletzer, A.; St. John, H.; Fredian, T.; Sugiyama, L.



Human Centered Hardware Modeling and Collaboration  

NASA Technical Reports Server (NTRS)

In order to collaborate engineering designs among NASA Centers and customers, to in clude hardware and human activities from multiple remote locations, live human-centered modeling and collaboration across several sites has been successfully facilitated by Kennedy Space Center. The focus of this paper includes innovative a pproaches to engineering design analyses and training, along with research being conducted to apply new technologies for tracking, immersing, and evaluating humans as well as rocket, vehic le, component, or faci lity hardware utilizing high resolution cameras, motion tracking, ergonomic analysis, biomedical monitoring, wor k instruction integration, head-mounted displays, and other innovative human-system integration modeling, simulation, and collaboration applications.

Stambolian Damon; Lawrence, Brad; Stelges, Katrine; Henderson, Gena



Experiential Collaborative Learning and Preferential Thinking  

NASA Astrophysics Data System (ADS)

The paper presents a Project-Based Learning (shortly, PBL) approach in a collaborative educational environment aimed to develop design ability and creativity of students coming from different engineering disciplines. Three collaborative learning experiences in product design were conducted in order to study their impact on preferred thinking styles of students. Using a thinking style inventory, pre- and post-survey data was collected and successively analyzed through ANOVA techniques. Statistically significant results showed students successfully developed empathy and an openness to multiple perspectives. Furthermore, data analysis confirms that the proposed collaborative learning experience positively contributes to increase awareness in students' thinking styles.

Volpentesta, Antonio P.; Ammirato, Salvatore; Sofo, Francesco


DSM collaboratives: What characteristics lead to success  

SciTech Connect

A new approach to reaching agreement on demand-side management (DSM) program design and policies emerged in 1988 when the Connecticut Department of Public Utility Control ordered Connecticut Light and Power Company to work jointly with the intervenors to enhance its DSM efforts in the aftermath of a contentious rate case. The interactive approach developed by the participants became known as the nation's first DSM collaborative, and it was soon followed by a wave of DSM collaboratives around the country. In this article, the authors suggest many ways in which current and future participants in collaboratives can improve their chances of achieving successful outcomes. 6 refs., 4 tabs., 1 fig.

Schweitzer, M. (Oak Ridge National Lab., TN (United States)); Raab, J.



Analytics and Management of Collaborative Intranets  

NASA Astrophysics Data System (ADS)

We present analytic framework for evidence-based management, design, and engineering of collaborative intranet environments. The analytics target elucidation of essential elements of human-system interactions. Temporal segmentation of human behavior in digital environments permits identification of crucial navigational points as well as higher order abstractions. Explorations of these elements provide fertile grounds for assessment of usability and behavioral characteristics that directly translate to actionable knowledge indispensable for improvements of collaboration portals. We extrapolate the analytic findings from a case study of a large scale collaborative organizational intranet; in order to identify three crucial domains facilitating alignment between observed evidence and best management and engineering practices.

Géczy, Peter; Izumi, Noriaki; Akaho, Shotaro; Hasida, Kôiti


Student Collaborative Networks and Academic Performance  

NASA Astrophysics Data System (ADS)

Undergraduate physics students commonly collaborate with one another on homework assignments, especially in more challenging courses. However, there currently exists a dearth of empirical research directly comparing the structure of students' collaborative networks to their academic performances in lower and upper division physics courses. We investigate such networks and associated performances through a mandated collaboration reporting system in two sophomore level and three junior level physics courses during the Fall 2012 and Spring 2013 semesters. We employ social network analysis to quantify the structure and time evolution of networks involving approximately 140 students. Analysis includes analytical and numerical assignments in addition to homework and exam scores. Preliminary results are discussed.

Schmidt, David; Bridgeman, Ariel; Kohl, Patrick



Global Collaborations - Prospects and Problems  

NASA Astrophysics Data System (ADS)

International collaboration has long been a feature of science. Collaborative investments in joint facilities and projects have grown considerably over the past 20-40 years, and many projects have been multinational from the start. This has been particularly true in Europe, where intergovernmental organizations such as CERN, ESA, and ESO have enabled European countries to carry out forefront science with state-of-art facilites which would have been beyond the capabilities of any one country. A brief survey of these organizations, their structure, and the possible reasons behind their success is given. The transition from regional to global creates new problems. Global scale projects face a range of generic issues which must be addressed and overcome if the project is to be a success. Each project has its own specific boundary conditions and each adopts an approach best fitted to its own objectives and constraints. Experience with billion dollar projects such as the SSC, LHC, and ITER shows the key problem areas and demonstrates the importance of preparatory work in the early stages to settle issues such as schedule, funding, location, legal and managerial structure, and oversight. A range of current and proposed intercontinental or global projects - so- called ``Megascience Projects" - is reviewed. Such projects, originally a feature of space and particle physics, are now becoming more common, and very large projects in astronomy, for example ALMA and 50 - 100m telescopes, and other areas of physics now fall into the `global' category. These projects are on such a large scale, from any scientific, managerial, financial or political perspective, and have such global importance, that they have necessarily been conceived as international from the outset. Increasing financial pressures on governments and funding agencies in the developed countries place additional demands on the project planning. The contrasting approaches, problems faced, and progress made in various projects will be analyzed and possible lessions drawn out. The role which can be played in the early stages by bodies such as the OECD Global Science Forum and G-8 Carnegie Meetings, where science policy makers meet, is examined. Experience shows that these valuable `scene setting' discussions have to be informed by coordinated input from the scientific community and must be followed up by more detailed discussions between funding agencies or their equivalent, because decision making requires the development of a consensus amongst the participants. This process can be illustrated most effectively by the care with which the ideas for the International Linear Collider have been and are being developed. Agreement on building and operating a facility is not the end of the story. The legitimate desire of scientists in all other countries to be able to participate in exploiting a major new facility has to be taken into account, and that introduces a range of proprietary and sociological issues over data access and rights, and now, with the explosion in computing and storage powers, in data archiving support. These are issues which can be addressed within the scientific community and taken to the political arena via such bodies as the OECD Global Science Forum.

Corbett, Ian



EB 2007 Careers Symposium - Guide for Successful Collaboration: From the Handshake to the Collaborative Research Agreement  

NSDL National Science Digital Library

Successful collaborations foster successful scientific careers. Scientific collaboration is a critical feature of the research process. Not only is it a requirement for the advancement of scientific knowledge, but it is also an important skill for scientists to possess for a successful and productive career. Initiating a successful collaboration is a skill that many scientists have little experience with early in their careers. Collaboration is key to expanding ones scientific reach, potentially tapping into resources (technologies, reagents, ideas) that might not be immediately available. But, how do you take the first step? How does one collaborate with the pharmaceutical industry? How does one tap into VA/Military research dollars and resources? What are the legal issues of a formal collaboration? What types of collaborations are common? This Symposium will help to answer these questions by describing various types of collaborations within academia, between academia and industry, and between basic and clinical scientists, and how to initiate them. The Symposium will also discuss more non-traditional collaborations, such as those with the US government and Veterans Administration. Finally, it will also cover what to expect from the legal perspective, specifically the common reasons why collaborations fail or fall through.

Stephanie W Watts (Michigan State University); PhD Stephen A Douglas (GlaxoSmithKline); PhD Janet Harris (Director, US Army Congressionally Directed Medical Research Programs); Jay B Winchester (Judge Advocate, US Army Medical Research and Material Command)



Multicenter Epidemiological Study to Assess the Population of CKD Patients in Greece: Results from the PRESTAR Study  

PubMed Central

Background Chronic Kidney Disease (CKD) is a relatively common condition not only associated with increased morbidity and mortality but also fuelling End Stage Renal Disease (ESRD). Among developed nations, Greece has one of the highest ESRD incidence rates, yet there is limited understanding of the epidemiology of earlier stages of CKD. Methods Cross-sectional survey of pre-dialysis CKD outpatients in nephrology clinics in the National Health Care system between October 2009 and October 2010. Demographics, cause of CKD, blood pressure, level of renal function, duration of CKD and nephrology care, and specialty of referral physician were collected and analyzed. Different methods for estimating renal function (Cockroft-Gault [CG], CKD-Epi and MDRD) and staging CKD were assessed for agreement. Results A total of 1,501 patients in 9 centers were enrolled. Diabetic nephropathy was the most common nephrologist assigned cause of CKD (29.7%). In total, 36.5% of patients had self-referred to the nephrologist; patients with diabetes or serum creatinine above 220 µmol/l (eGFR<40 ml/min/1.73 m2) were more likely to have been referred by a physician. Agreement between MDRD and CKD-Epi, but not between CG, the other estimating equations, was excellent. There was substantial heterogeneity with respect to renal diagnoses, referral patterns and blood pressure among participating centers. Conclusions In this first epidemiologic assessment of CKD in Greece, we documented delayed referral and high rates of self-referral among patients with CKD. eGFR reporting, currently offered by a limited number of laboratories, may facilitate detection of CKD at an earlier, more treatable stage. PMID:25406080

Sombolos, Konstantinos; Tsakiris, Demitrios; Boletis, John; Vlahakos, Demetrios; Siamopoulos, Kostas C.; Vargemezis, Vassilios; Nikolaidis, Pavlos; Iatrou, Christos; Dafnis, Eugene; Xynos, Konstantinos; Argyropoulos, Christos



Nikolaevskiy equation with dispersion.  


The Nikolaevskiy equation was originally proposed as a model for seismic waves and is also a model for a wide variety of systems incorporating a neutral "Goldstone" mode, including electroconvection and reaction-diffusion systems. It is known to exhibit chaotic dynamics at the onset of pattern formation, at least when the dispersive terms in the equation are suppressed, as is commonly the practice in previous analyses. In this paper, the effects of reinstating the dispersive terms are examined. It is shown that such terms can stabilize some of the spatially periodic traveling waves; this allows us to study the loss of stability and transition to chaos of the waves. The secondary stability diagram ("Busse balloon") for the traveling waves can be remarkably complicated. PMID:20365845

Simbawa, Eman; Matthews, Paul C; Cox, Stephen M



Multidimensional fractional Schrödinger equation  

NASA Astrophysics Data System (ADS)

This work is intended to investigate the multi-dimensional space-time fractional Schrödinger equation of the form (CDt0+?u)(t,x) = i?/2m(C??u)(t,x), with ? the Planck's constant divided by 2?, m is the mass and u(t,x) is a wave function of the particle. Here (CDt0+?,C?? are operators of the Caputo fractional derivatives, where ? ?]0,1] and ? ?]1,2]. The wave function is obtained using Laplace and Fourier transforms methods and a symbolic operational form of solutions in terms of the Mittag-Leffler functions is exhibited. It is presented an expression for the wave function and for the quantum mechanical probability density. Using Banach fixed point theorem, the existence and uniqueness of solutions is studied for this kind of fractional differential equations.

Rodrigues, M. M.; Vieira, N.



Causal electromagnetic interaction equations  

SciTech Connect

For the electromagnetic interaction of two particles the relativistic causal quantum mechanics equations are proposed. These equations are solved for the case when the second particle moves freely. The initial wave functions are supposed to be smooth and rapidly decreasing at the infinity. This condition is important for the convergence of the integrals similar to the integrals of quantum electrodynamics. We also consider the singular initial wave functions in the particular case when the second particle mass is equal to zero. The discrete energy spectrum of the first particle wave function is defined by the initial wave function of the free-moving second particle. Choosing the initial wave functions of the free-moving second particle it is possible to obtain a practically arbitrary discrete energy spectrum.

Zinoviev, Yury M. [Steklov Mathematical Institute, Gubkin Street 8, 119991, Moscow (Russian Federation)



A Persuasive Example of Collaborative Learning.  

ERIC Educational Resources Information Center

Describes the 12-week long collaborative learning project used in a persuasion and propaganda course. Explains that the students worked in groups on a persuasive campaign to change a target population. States that the student projects were persuasive. (CMK)

Carlsmith, Kevin M.; Cooper, Joel



Negotiation and Contracting in Collaborative Networks  

NASA Astrophysics Data System (ADS)

Due to the increasing market turbulence, companies, organizations and individuals need to tune their actuation forms so that they can prevail. It is particularly essential to create alliances and partnerships for collaborative problem solving when responding to new businesses or collaborative opportunities. In all types of alliances it is necessary to establish agreements that represent the rights and duties of all involved parts in a given collaboration opportunity. Therefore, it is important to deeply understand the structures and requirements of these alliances, i.e. what kind of members does the alliance have, what kind of protocols may be implied, how conflicts may possibly be resolved, etc. Moreover to these requirements, also the required support tools and mechanisms have to be identified. For that, this paper presents a research work that is being carried in the negotiation and contracting field, in order to promote agility in collaborative networks.

Oliveira, Ana Inês; Camarinha-Matos, Luis M.


Opportunistic, collaborative and synchronized, proximal device ecology  

E-print Network

CoSync is an on-device software framework for coordinating proximal consumer electronic devices in order to create a synchronized, opportunistic and collaborative device ecology. The CoSync device ecology combines multiple ...

Toledano, Eyal



Successful collaboration within an integrative practice model.  


The purpose of this article is to illustrate how collaboration is a key aspect in successful use of an integrative practice model. The integrative practice model depicts the clinical nurse manager, staff development specialist, and clinical nurse specialist roles as having a primary focus with shared secondary dimensions. Critical components of successful collaboration are described as: the establishment of a trusting relationship, ability to develop mutually satisfying goals, and effective communication. An example of the authors' successful implementation of the integrative practice model is given. Positive, measurable outcomes validated the effectiveness of this model when combined with effective collaboration. Striving for successful collaboration within an integrative practice model is recommended to other advanced practitioners who wish to increase individual effectiveness, enhance professional growth, and improve patient outcomes. PMID:7704875

Kopser, K G; Horn, P B; Carpenter, A D



Satish Bukkapatnam Ranga Komanduri Collaborating Faculty -OSU  

E-print Network

Satish Bukkapatnam Ranga Komanduri Collaborating Faculty - OSU Chuck Bunting (ECE) Venkatesh and Monitoring of CMP of Si Wafers Wireless RF/RFID Vibration Sensors for Container Integrity Monitoring Pipeline

Bukkapatnam, Satish T.S.


Seven Principles of Highly Collaborative PD  

NSDL National Science Digital Library

Convening professionals--physically or virtually--is necessary but certainly not sufficient for meaningful collaboration and networking to occur. Professional development (PD) must be designed and carried out in ways that encourage a culture of sustained co

Lee, Michele H.



Robot Partners: Collaborative Perceptual Robotic Systems  

E-print Network

Robot Partners: Collaborative Perceptual Robotic Systems Working paper Cooperative Distributed robotic systems, including remote-brained soccer players, visually guided mobile robots, and visual been supported by the the Networks of Centres of Excellence Institute for Robotics and Intelligent

Little, Jim


Best practices for university-industry collaboration  

E-print Network

This thesis reports findings from a study of best practices for university-industry collaboration. The study involved over 70 interviews at 17 large technology companies with company managers and individuals having ...

Calder, Edward Spencer



Something To Talk About: Six Collaborative Conversations.  

ERIC Educational Resources Information Center

Presents six conversations between school library media specialists and teachers that are based on true stories involving collaboration. Discusses pressures to relinquish individuality in lesson plans; planning; curriculum development; and child development classes and preschool programs. (LRW)

Bush, Gail



Collaboration inspires nuclear engineering student Alexis Kaplan  

E-print Network

Mountains, where relaxed conversations on a ski lift or coffee shop are likely to spur novel innovations stimulates a scientific culture connected to the natural world, it also nurtures a collaborative environment


Progress Report for C-Mod Collaboration  

SciTech Connect

The aims of the collaboration have not changed. The report describes progress in the areas of FRCECE system, charge exchange recombination spectroscopy, Beam-Emission spectroscopy (BES), as well as other contributions. A significant number of resulting publications are listed.

Dr. Kenneth W. Gentle, Dr. William Rowan, Dr. Perry Phillips



Collaborative Lab Reports with Google Docs  

NASA Astrophysics Data System (ADS)

Science is a collaborative endeavor. The solitary genius working on the next great scientific breakthrough is a myth not seen much today. Instead, most physicists have worked in a group at one point in their careers, whether as a graduate student, faculty member, staff scientist, or industrial researcher. As an experimental nuclear physicist with research at the Thomas Jefferson National Accelerator Facility, my collaboration consists of over 200 scientists, both national and international. A typical experiment will have a dozen or so principal investigators. Add in the hundreds of staff scientists, engineers, and technicians, and it is clear that science is truly a collaborative effort. This paper will describe the use of Google Docs for collaborative reports for an introductory physics laboratory.

Wood, Michael



Sociapedia : online collaboration over a social network  

E-print Network

This paper introduces Sociapedia, a collaborative social network application that encourages friends to contribute content about each other. Sociapedia is designed upon the same principles that allowed ordinary web users ...

Kedia, Mihir



NCI: SBIR & STTR - Investor Forum - Collaborators

The 2012 NCI SBIR Investor Forum was sponsored by The National Cancer Institute's SBIR Development Center in partnership with the Foundation for the National Institutes of Health (FNIH) and in collaboration with Prescience International.


CNP Project: Southwest American Indian Collaborative Network

The Inter Tribal Council of Arizona1 established the Southwest American Indian Collaborative Network (SAICN) to eliminate cancer health disparities among American Indians. Core partners in the project represent both local and regional programs and activities.


Spatial aspects of mobile ad hoc collaboration  

E-print Network

Traditionally, communication devices are designed to overcome distance in space or time. How can personal mobile tools augment local interaction and promote spontaneous collaboration between users in proximity? Mobile ad ...

Chardin, Ivan Sergeyevich, 1977-



Some collaboration-competition bipartite networks  

E-print Network

Recently, we introduced a quantity, "node weight", to describe the collaboration sharing or competition gain of the elements in the collaboration-competition networks, which can be well described by bipartite graphs. We find that the node weight distributions of all the networks follow the so-called "shifted power law (SPL)". The common distribution function may indicate that the evolution of the collaboration and competition in very different systems obeys a general rule. In order to set up a base of the further investigations on the universal system evolution dynamics, we now present the definition of the networks and their node weights, the node weight distributions, as well as the evolution durations of 15 real world collaboration-competition systems which are belonging to diverse fields.

Xu, Xiu-Lian; Shen, Dan; Liu, Ai-Fen; He, Da-Ren



Making together : creative collaboration for everyone  

E-print Network

This thesis explores how we can design learning environments to support broad participation in creative collaboration-that is, the process of working together on the construction of an artifact. I describe and analyze the ...

Roque, Ricarose Vallarta



Webbed Footnotes : collaborative annotation on the Web  

E-print Network

More and more, web users are moving from simply consuming content on the web to creating it as well, in the form of discussion boards, weblogs, wikis, and other collaborative and conversational media. Despite this, the web ...

Golder, Scott Andrew



The Human Equation  

E-print Network

This is a work in progress. It is Copyright ? Michael J. Natale. Star Trek characters are Copyright Paramount Pictures and are used without permission. Please don?t sue me. It is provided here for personal, non commercial use under a Creative... Commons Attribution-Non-Commercial-No Derivatives license. THE HUMAN EQUATION A work of Star Trek Fan Fiction by Michael J. Natale CHAPTER ONE STARDATE: 3228.6 Near the Klingon Neutral Zone...

Natale, Michael J.


Multinomial diffusion equation  

SciTech Connect

We describe a new, microscopic model for diffusion that captures diffusion induced fluctuations at scales where the concept of concentration gives way to discrete particles. We show that in the limit as the number of particles N {yields} {infinity}, our model is equivalent to the classical stochastic diffusion equation (SDE). We test our new model and the SDE against Langevin dynamics in numerical simulations, and show that our model successfully reproduces the correct ensemble statistics, while the classical model fails.

Balter, Ariel I.; Tartakovsky, Alexandre M.



Collaborative learning and computer?supported groups  

Microsoft Academic Search

Computer?supported collaborative learning (CSCL) is the educational use of on?line groups. Utilizing on?line groups for instruction requires an understanding of the multiple issues involved in CSCL, such as the pedagogy applicable to groups and how communication technology influences group interaction. Theoretical and empirical research relevant to the use of CSCL?including collaborative learning research and computer?mediated communication research?is discussed using a

David P. Brandon; Andrea B. Hollingshead



Designing for collaborative creative problem solving  

Microsoft Academic Search

Collaborative creativity is traditionally supported by formal techniques, such as brainstorming. These techniques im- prove the idea-generation process by creating group syner- gies, but also suffer from a number of negative effects (12). Current electronic tools to support collaborative creativity overcome some of these problems, but introduce new ones, by either losing the benefits of face-to-face communication or the immediacy

Otmar Hilliges; Lucia Terrenghi; Sebastian Boring; David Kim; Hendrik Richter; Andreas Butz



Collaborative home media community with semantic support  

Microsoft Academic Search

The great success of social technologies such as media sharing, blogs and wikis, is transforming the Internet into a collaborative community. This paper presents our research towards the exploitation of P2P networks, semantic metadata and social tagging for home media sharing, with a vision of P2P-based Collaborative Home Media Community (CHMC). The goal of the proposed CHMC is to enable

Hongguang Zhang; Marc Girod-Genet; Djamal Zeghlache; Tien Anh Le; Hang Nguyen; Noël Crespi



The collaborative emergence of group cognition.  


We extend Smaldino's approach to collaboration and social organization in cultural evolution to include cognition. By showing how recent work on emergent group-level cognition can be incorporated within Smaldino's framework, we extend that framework's scope to encompass collaborative memory, decision making, and intelligent action. We argue that beneficial effects arise only in certain forms of cognitive interdependence, in surprisingly fragile conditions. PMID:24970424

Theiner, Georg; Sutton, John



Does Action Learning Promote Collaborative Leadership?  

Microsoft Academic Search

Given the need to unlock the capacity of everyone in the organization, interest in collaborative leadership is growing. But how is such a practice developed? The author proposes the use of action learning—in its original formulation, namely, through reflection on real-time work experience dealing with unfamiliar problems—as a gateway to collaborative leadership. Action learning is portrayed as growing in acceptance




Leveraging Coordinative Conventions to Promote Collaboration Awareness  

Microsoft Academic Search

The paper discusses the conventions used by medical practitioners to improve their collaboration mediated by Clinical Records.\\u000a The case study focuses on the coordinative conventions identified in two wards of an Italian hospital and highlights their\\u000a role and importance in the definition of the requirements of any system supportive of collaborative work practices. These\\u000a requirements are expressed in terms of

Federico Cabitza; Carla Simone; Marcello Sarini



IRFCF: Iterative Rating Filling Collaborative Filtering Algorithm  

Microsoft Academic Search

\\u000a The aim of collaborative filtering is to make predictions for active user by utilizing the rating information of likeminded\\u000a users in a historical database. But previous methods suffered from problems: sparsity, scalability, rating bias etc. To alleviate\\u000a those problems, this paper presents a novel approach—Iterative Rating Filling Collaborative Filtering algorithm (IRFCF). Firstly,\\u000a based on the idea of iterative reinforcement process,

Jie Shen; Ying Lin; Gui-rong Xue; Fan-de Zhu; Ai-guo Yao



The Collaborative Digital Imaging Network Project  

NASA Astrophysics Data System (ADS)

The Digital Imaging Network (DIN) Project is a collaborative project among numerous components of the Department of Defense, Public Health Service, Veterans Administration, industry, academia, and the MITRE Corporation. The project is evaluating prototype DIN systems (DINS) at Georgetown University (in collaboration with George Washington University) in Washington, DC, and at the University of Washington in Seattle, WA. Results of the project will be used to plan DINS for implementation in fixed and deployable military medical care facilities in the 1990's.

Greberman, Melvyn; Goeringer, Fred; Shannon, Roger; Hagen, Raoul; Sweeney, Thomas; Ghaed, Victor; Thomas, Jerry



Gearbox Reliability Collaborative (GRC) Description and Loading  

SciTech Connect

This document describes simulated turbine load cases in accordance to the IEC 61400-1 Ed.3 standard, which is representative of the typical wind turbine design process. The information presented herein is intended to provide a broad understanding of the gearbox reliability collaborative 750kW drivetrain and turbine configuration. In addition, fatigue and ultimate strength drivetrain loads resulting from simulations are presented. This information provides the bases for the analytical work of the gearbox reliability collaborative effort.

Oyague, F.



Collaborative environments for capability-based planning  

NASA Astrophysics Data System (ADS)

Distributed collaboration is an emerging technology for the 21st century that will significantly change how business is conducted in the defense and commercial sectors. Collaboration involves two or more geographically dispersed entities working together to create a "product" by sharing and exchanging data, information, and knowledge. A product is defined broadly to include, for example, writing a report, creating software, designing hardware, or implementing robust systems engineering and capability planning processes in an organization. Collaborative environments provide the framework and integrate models, simulations, domain specific tools, and virtual test beds to facilitate collaboration between the multiple disciplines needed in the enterprise. The Air Force Research Laboratory (AFRL) is conducting a leading edge program in developing distributed collaborative technologies targeted to the Air Force's implementation of systems engineering for a simulation-aided acquisition and capability-based planning. The research is focusing on the open systems agent-based framework, product and process modeling, structural architecture, and the integration technologies - the glue to integrate the software components. In past four years, two live assessment events have been conducted to demonstrate the technology in support of research for the Air Force Agile Acquisition initiatives. The AFRL Collaborative Environment concept will foster a major cultural change in how the acquisition, training, and operational communities conduct business.

McQuay, William K.



10 years of the Medipix2 Collaboration  

NASA Astrophysics Data System (ADS)

The Medipix2 Collaboration was started officially in September 1999 with the aim of disseminating hybrid pixel detector technology from High Energy Physics to other fields. The Collaboration was initially composed of 13 European research institutes. Over the ensuing 10 years the Collaboration expanded to reach a peak of 17 member institutes. Although our main scientific focus has been the development of the Medipix2 and Timepix single photon counting pixel detector readout chips the Collaboration members have expanded the range of applications for the technology to many more scientific fields than initially foreseen. We have signed a number of Technology Transfer Agreements during that time, most notably with PANalytical, whose commercially available PIXcel detector is based on the second version of the Medipix2 chip. This paper will review the history of the Collaboration covering as much as possible the main technical highlights. The success of the Collaboration is testimony to the willingness of a large number of groups and individuals to pool efforts for a common purpose. The paper will also cover some of those aspects and summarize the lessons learnt.

Cambbell, Michael; Medipix2 Collaboration



Security and Policy for Group Collaboration  

SciTech Connect

“Security and Policy for Group Collaboration” was a Collaboratory Middleware research project aimed at providing the fundamental security and policy infrastructure required to support the creation and operation of distributed, computationally enabled collaborations. The project developed infrastructure that exploits innovative new techniques to address challenging issues of scale, dynamics, distribution, and role. To reduce greatly the cost of adding new members to a collaboration, we developed and evaluated new techniques for creating and managing credentials based on public key certificates, including support for online certificate generation, online certificate repositories, and support for multiple certificate authorities. To facilitate the integration of new resources into a collaboration, we improved significantly the integration of local security environments. To make it easy to create and change the role and associated privileges of both resources and participants of collaboration, we developed community wide authorization services that provide distributed, scalable means for specifying policy. These services make it possible for the delegation of capability from the community to a specific user, class of user or resource. Finally, we instantiated our research results into a framework that makes it useable to a wide range of collaborative tools. The resulting mechanisms and software have been widely adopted within DOE projects and in many other scientific projects. The widespread adoption of our Globus Toolkit technology has provided, and continues to provide, a natural dissemination and technology transfer vehicle for our results.

Ian Foster; Carl Kesselman



Study on affecting factors of collaborative product development based on collaboration hierarchy model  

Microsoft Academic Search

Aiming at the levels of collaborative degree in web-based product development, a collaboration hierarchy model of this product\\u000a development is developed in this paper. Based on the model, the affecting factors on collaboration levels are analyzed systematically\\u000a from many aspects, such as technology, organization and business. A gap analysis method is studied in detail, and is applied\\u000a in a real

Xiaodong Zhang; Yingzi Li; Zhiqiang Zhang



Collaborative Planning for Collaborative Learning: Designing and Promoting New Learning Spaces on Campus  

E-print Network

in October 2003 #0;? Collaborative Learning Spaces #0;? Digital Preservation #0;? Quality Services for Scholars #0;? Quality Services for Decision-Makers #0;? Quality Services for Students Collaborative Learning Spaces Working Group - Charge To evaluate... on ?information commons? model #0;? Provide new environment for information literacy instruction and IT training #0;? CTE + IDS #0;? Provide a laboratory for exploring and fostering collaborative learning on campus #0;? TLC #0;? Establish a location where group...

Walter, Scott



A Framework to Foster Collaboration between Students through a Computer Supported Collaborative Learning Environment  

Microsoft Academic Search

\\u000a Computer Supported Collaborative Learning (CSCL) environments facilitate the management of collaborative tasks. However, these\\u000a systems do not usually provide the personalization features required to adapt the learning experience to the student needs,\\u000a a drawback that can affect the collaboration objective and ultimately the learning process. Nevertheless, there have been\\u000a several research approaches that have progressed on providing intelligent features to

A. Bayón; O. C. Santos; J. Couchet; J. G. Boticario


Differential Equations Compatible with Boundary Rational qKZ Equation  

NASA Astrophysics Data System (ADS)

We give diffierential equations compatible with the rational qKZ equation with boundary reflection. The total system contains the trigonometric degeneration of the bispectral qKZ equation of type (C?en, Cn) which in the case of type GLn was studied by van Meer and Stokman. We construct an integral formula for solutions to our compatible system in a special case.

Takeyama, Yoshihiro



Raising the Profile of Innovative Teaching in Higher Education? Reflections on the EquATE Project  

ERIC Educational Resources Information Center

This paper presents a methodology developed by members of the Research Centre for Learning and Teaching (RCfLAT) to collaborate with university teaching colleagues to produce theoretically- and pedagogically-based case studies of innovations in teaching and learning. The Equal Acclaim for Teaching Excellence (EquATE) project investigates…

Robson, Sue; Wall, Kate; Lofthouse, Rachel



Collaborative Tracking of Image Features Based on Projective Invariance  

NASA Astrophysics Data System (ADS)

In past manned lunar landing missions, such as Apollo 14, spatial disorientation of astronauts substantially compromised the productivities of astronauts, and caused safety and mission success problems. The non-GPS lunar environment has micro-gravity field, and lacks both spatial recognition cues and reference objects which are familiar to the human biological sensors related to spatial recognition (e.g. eyes). Such an environment causes misperceptions of the locations of astronauts and targets and their spatial relations, as well as misperceptions of the heading direction and travel distances of astronauts. These spatial disorientation effects can reduce productivity and cause life risks in lunar manned missions. A navigation system, which is capable of locating astronauts and tracking the movements of them on the lunar surface, is critical for future lunar manned missions where multiple astronauts will traverse more than 100km from the lander or the base station with the assistance from roving vehicle, and need real-time navigation support for effective collaborations among them. Our earlier research to solve these problems dealt with developing techniques to enable a precise, flexible and reliable Lunar Astronaut Spatial Orientation and Information System (LASOIS) capable of delivering real-time navigation information to astronauts on the lunar surface. The LASOIS hardware was a sensor network composed of orbital, ground and on-suit sensors: the Lunar Reconnaissance Orbiter Camera (LROC), radio beacons, the on-suit cameras, and shoe-mounted Inertial Measurement Unit (IMU). The LASOIS software included efficient and robust algorithms for estimating trajectory from IMU signals, generating heading information from imagery acquired from on-suit cameras, and an Extended Kalman Filter (EKF) based approach for integrating these spatial information components to generate the trajectory of an astronaut with meter-level accuracy. Moreover, LASOIS emphasized multi-mode sensors for improving the flexibility and robustness of the system. From the experimental results during three field tests for the LASOIS system, we observed that most of the errors in the image processing algorithm are caused by the incorrect feature tracking. This dissertation addresses the feature tracking problem in image sequences acquired from cameras. Despite many alternatives to feature tracking problem, iterative least squares solution solving the optical flow equation has been the most popular approach used by many in the field. This dissertation attempts to leverage the former efforts to enhance feature tracking methods by introducing a view geometric constraint to the tracking problem, which provides collaboration among features. In contrast to alternative geometry based methods, the proposed approach provides an online solution to optical flow estimation in a collaborative fashion by exploiting Horn and Schunck flow estimation regularized by view geometric constraints. Proposed collaborative tracker estimates the motion of a feature based on the geometry of the scene and how the other features are moving. Alternative to this approach, a new closed form solution to tracking that combines the image appearance with the view geometry is also introduced. We particularly use invariants in the projective coordinates and conjecture that the traditional appearance solution can be significantly improved using view geometry. The geometric constraint is introduced by defining a new optical flow equation which exploits the scene geometry from a set drawn from tracked features. At the end of each tracking loop the quality of the tracked features is judged using both appearance similarity and geometric consistency. Our experiments demonstrate robust tracking performance even when the features are occluded or they undergo appearance changes due to projective deformation of the template. The proposed collaborative tracking method is also tested in the visual navigation algorithm of the LASOIS system instead of original KLT tracking method for the experiment data from

Jiang, Jinwei


Lesson 5: Equations of lines  

NSDL National Science Digital Library

Begins with the slope-intercept equation of a line and then introduces the coordinate formula for slope before the introduction of the point-slope equation of a line. Linear models are then revisited.



Nonlocal Evolution Equations Peter Constantin  

E-print Network

Nonlocal Evolution Equations Peter Constantin intro SQG Nonlinear Maximum Principle Long time behavior Nonlocal Evolution Equations Peter Constantin Department of Mathematics and PACM Princeton Peter Constantin intro SQG Nonlinear Maximum Principle Long time behavior Whence nonlocality Linear


Conservational PDF Equations of Turbulence  

NASA Technical Reports Server (NTRS)

Recently we have revisited the traditional probability density function (PDF) equations for the velocity and species in turbulent incompressible flows. They are all unclosed due to the appearance of various conditional means which are modeled empirically. However, we have observed that it is possible to establish a closed velocity PDF equation and a closed joint velocity and species PDF equation through conditions derived from the integral form of the Navier-Stokes equations. Although, in theory, the resulted PDF equations are neither general nor unique, they nevertheless lead to the exact transport equations for the first moment as well as all higher order moments. We refer these PDF equations as the conservational PDF equations. This observation is worth further exploration for its validity and CFD application

Shih, Tsan-Hsing; Liu, Nan-Suey




Microsoft Academic Search

We study the large deviation function and small time asymptotics near the diagonal for the heat equation associated to Geometric Fokker-Planck equations (GFK) on the cotangent bundle ? = TX of a Riemannian smooth compact connected variety X.

Gilles Lebeau



National Wind Distance Learning Collaborative  

SciTech Connect

Executive Summary The energy development assumptions identified in the Department of Energy's position paper, 20% Wind Energy by 2030, projected an exploding demand for wind energy-related workforce development. These primary assumptions drove a secondary set of assumptions that early stage wind industry workforce development and training paradigms would need to undergo significant change if the workforce needs were to be met. The current training practice and culture within the wind industry is driven by a relatively small number of experts with deep field experience and knowledge. The current training methodology is dominated by face-to-face, classroom based, instructor present training. Given these assumptions and learning paradigms, the purpose of the National Wind Distance Learning Collaborative was to determine the feasibility of developing online learning strategies and products focused on training wind technicians. The initial project scope centered on (1) identifying resources that would be needed for development of subject matter and course design/delivery strategies for industry-based (non-academic) training, and (2) development of an appropriate Learning Management System (LMS). As the project unfolded, the initial scope was expanded to include development of learning products and the addition of an academic-based training partner. The core partners included two training entities, industry-based Airstreams Renewables and academic-based Lake Area Technical Institute. A third partner, Vision Video Interactive, Inc. provided technology-based learning platforms (hardware and software). The revised scope yielded an expanded set of results beyond the initial expectation. Eight learning modules were developed for the industry-based Electrical Safety course. These modules were subsequently redesigned and repurposed for test application in an academic setting. Software and hardware developments during the project's timeframe enabled redesign providing for student access through the use of tablet devices such as iPads. Early prototype Learning Management Systems (LMS) featuring more student-centric access and interfaces with emerging social media were developed and utilized during the testing applications. The project also produced soft results involving cross learning between and among the partners regarding subject matter expertise, online learning pedagogy, and eLearning technology-based platforms. The partners believe that the most significant, overarching accomplishment of the project was the development and implementation of goals, activities, and outcomes that significantly exceeded those proposed in the initial grant application submitted in 2009. Key specific accomplishments include: (1) development of a set of 8 online learning modules addressing electrical safety as it relates to the work of wind technicians; (3) development of a flexible, open-ended Learning Management System (LMS): (3) creation of a robust body of learning (knowledge, experience, skills, and relationships). Project leaders have concluded that there is substantial resource equity that could be leverage and recommend that it be carried forward to pursue a Next Stage Opportunity relating to development of an online core curriculum for institute and community college energy workforce development programs.

Dr. James B. Beddow



Short communication Fractional Mathieu equation  

E-print Network

Short communication Fractional Mathieu equation R.H. Rand a,b,*, S.M. Sah c , M.K. Suchorsky of Mathieu's equation, x00 þ ðd þ cos t�x ¼ 0; ð10� being an equation which is important in questions the familiar damped Mathieu equation [19]. We begin the paper with a brief introduction to the fractional

Rand, Richard H.


Time Dilation Equation  

NSDL National Science Digital Library

This online article is from the Museum's Seminars on Science, a series of distance-learning courses designed to help educators meet the new national science standards. The article, which offers a simple demonstration of Einstein's Time Dilation Equation, is part of the Frontiers in Physical Science seminar. It uses the example of a light beam bouncing between two mirrors in a rocket to illustrate the theory, and includes a step-by-step look at the math involved in calculating the quantitative solution.


Learning about Mason: A Collaborative Lesson with a Struggling Reader  

ERIC Educational Resources Information Center

In this "Struggling Readers" department, the author describes a collaborative lesson--a professional development strategy adapted from Reading Recovery. Collaborative lessons involve a small group of educators who collaborate to help a student who is struggling with reading. While collaborative lessons were initially designed by Reading Recovery…

Compton-Lilly, Catherine



A Comparison of Collaborative and Traditional Instruction in Higher Education  

ERIC Educational Resources Information Center

Although collaborative instructional techniques have become popular in college courses, it is unclear whether collaborative techniques can replace more traditional instructional methods. We examined the efficacy of collaborative courses (in-class, collaborative activities with no lectures) compared to traditional lecture courses (in-class,…

Gubera, Chip; Aruguete, Mara S.



Shared Encoding and the Costs and Benefits of Collaborative Recall  

ERIC Educational Resources Information Center

We often remember in the company of others. In particular, we routinely collaborate with friends, family, or colleagues to remember shared experiences. But surprisingly, in the experimental collaborative recall paradigm, collaborative groups remember less than their potential, an effect termed "collaborative inhibition". Rajaram and…

Harris, Celia B.; Barnier, Amanda J.; Sutton, John



Collaborative Assessment of potential Value Generation in Development Projects  

E-print Network

Collaborative Assessment of potential Value Generation in Development Projects Ingo Westphal1 in this process. The objective of the paper is to suggest an approach for a collaborative assessment of potential. Keywords: Collaborative process, assessment, value proposition, collaboration capability. 1 Introduction

Paris-Sud XI, Université de


Solving the Human Problem: Investigation of a Collaboration Culture  

Microsoft Academic Search

It is often acknowledged that group work efficiency can only be achieved if co-workers adopt an adequate group culture. Collaboration should therefore be supported by the right culture, and tools aiming at enhancing collaboration should also facilitate the adoption of this collaboration culture. This paper therefore explores the underlying concepts involved in the creation of a collaboration culture within a

Gilles Gautier; May Bassanino; Terrence Fernando; Sylvia Kubaski



Design and Evaluation of a Collaborative Learning Environment  

ERIC Educational Resources Information Center

Collaboration becomes an essential competency in the current knowledge society. In this study, a collaborative learning environment was designed to facilitate students in group collaboration. Instructional support strategies of friendship and meaningful learning tasks were applied to promote collaboration. Scaffolding strategies such as writing…

Wang, Qiyun



Towards Quality of Experience in Advanced Collaborative Environments  

Microsoft Academic Search

Collaborative environments have the potential of truly supporting distributed teams but there are still a number of barriers preventing seamless collaboration. These barriers are a result of problems in the following four domains: 1) a lack of understanding of the tasks that people perform when they are collaborating; 2) a lack of understanding and fulfillment of users' needs during collaborations;

Brian Corrie; Hong-Yee Wong; Todd Zimmerman; Stephen Marsh; Andrew S. Patrick; Janice Singer; Bruno Emond; Sylvie Noël



Collaborative intelligent CAD framework incorporating design history tracking algorithm  

Microsoft Academic Search

This paper shows a new and efficient collaborative intelligent Computer Aided Design (CAD) framework in a theoretical study. While other collaborative CAD frameworks or protocols focus on decreasing the waiting time for updating design or communication methods for design review among collaborative designers, the suggested collaborative design protocol determines the next design ownership criterion with the objective of minimizing redundant

Hyunsoo Lee; Jonghyun Kim; Amarnath Banerjee



Liouville equation and schottky problem  

Microsoft Academic Search

An Ansatz for the Poincaré metric on compact Riemann surfaces is proposed. This implies that the Liouville equation reduces to an equation resembling a nonchiral analogous of the higher genus relationships (KP equation) arising within the framework of Schottky's problem solution. This approach connects uniformization (Fuchsian groups) and moduli space theories with KP hierarchy. Besides its mathematical interest, the Ansatz

Marco Matone; G. Galilei



Medical Math applications (Solving Equations)  

NSDL National Science Digital Library

Students use a formula to solve equations, for problems with a medical slant provided by Mesa Collegeâs Veterinary Program. This requires the use of subscript notation and the multiplication property of equality to solve. The equations are the simplest of linear equations however the application makes them more interesting.



On the Convergence of Collaboration and Knowledge Management  

E-print Network

Collaboration technology typically focuses on collaboration and group processes (cooperation, communication, coordination and coproduction). Knowledge Management (KM) technology typically focuses on content (creation, storage, sharing and use of data, information and knowledge). Yet, to achieve their common goals, teams and organizations need both KM and collaboration technology to make that more effective and efficient. This paper is interested in knowledge management and collaboration regarding their convergence and their integration. First, it contributes to a better understanding of the knowledge management and collaboration concepts. Second, it focuses on KM and collaboration convergence by presenting the different interpretation of this convergence. Third, this paper proposes a generic framework of collaborative knowledge management.

yahia, Nesrine Ben; Ghézala, Henda Ben



Two Dimensional Schrodinger Equation  

NSDL National Science Digital Library

The Two Dimensional Schrodinger Equation model simulates the time evolution of a two-dimensional wave packet as it moves towards a slit with an obstacle in it, both with variable widths. By changing three parameters via sliders provided, slit width, obstacle width, and initial position of the wave packet, different behaviors can be explored. These phenomena include interference, diffraction produced by a slit, a corner, and an obstacle, and bouncing of the wave packet. In addition, the angle of propagation for the diffracted part of the wave packet can be measured. This simulation is described by a paper in the European Journal of Physics, "A versatile applet to explore the wave behaviour of particles, " J I Fernández Palop, 2009 Eur. J. Phys. 30 771, which outlines the simulation and how the usefulness of the simulation has been tested in the subject of quantum physics. The Two Dimensional Schrodinger Equation model was created using the Easy Java Simulations (EJS) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_qm_schrodinger2d.jar file will run the program if Java is installed.

Palop, Jose I.



Improving the Odds Through the Collaboration Success Wizard.  


Collaboration has become a dominant mode of scientific inquiry, and good collaborative processes are important for ensuring scientific quality and productivity. Often the participants in these collaborations are not collocated, yet distance introduces challenges. There remains a need for evaluative tools that can identify potential collaboration problems early and provide strategies for managing and addressing collaboration issues. This paper introduces a new research and diagnostic tool, the Collaboration Success Wizard (CSW), and provides two case studies of its use in evaluating ongoing collaborative projects in the health sciences. The CSW is designed both to validate and refine existing theory about the factors that encourage successful collaboration and to promote good collaborative practices in geographically distributed team-based scientific projects. These cases demonstrate that the CSW can promote reflection and positive change in collaborative science. PMID:23338748

Bietz, Matthew J; Abrams, Steve; Cooper, Dan; Stevens, Kathleen R; Puga, Frank; Patel, Darpan; Olson, Gary M; Olson, Judith S



An Examination of the Characteristics Impacting Collaborative Tool Efficacy: The Uncanny Valley of Collaborative Tools  

ERIC Educational Resources Information Center

As collaboration among teams that are distributed in time and space is becoming increasingly important, there is a need to understand the efficacy of tools available to support that collaboration. This study employs a combination of the Technology Acceptance Model (TAM) and the Task-Technology Fit (TTF) model to compare four different technologies…

Dishaw, Mark T.; Eierman, Michael A.; Iversen, Jacob H.; Philip, George



Real-Time Mutual Gaze Perception Enhances Collaborative Learning and Collaboration Quality  

ERIC Educational Resources Information Center

In this paper we present the results of an eye-tracking study on collaborative problem-solving dyads. Dyads remotely collaborated to learn from contrasting cases involving basic concepts about how the human brain processes visual information. In one condition, dyads saw the eye gazes of their partner on the screen; in a control group, they did not…

Schneider, Bertrand; Pea, Roy



Small Group Collaboration in the Large Lecture Setting: Collaborative Process, Pedagogical Paradigms, and Institutional Constraints.  

ERIC Educational Resources Information Center

This paper focuses on some of the key issues involved in implementing a collaborative design project in the setting of the large undergraduate lecture course at a major research university, offering a preliminary analysis of the assignment mainly as a function of how students managed and interpreted it. The collaborative design project was…

Michalchik, Vera; Schaeffer, Evonne; Tovar, Lawrence; Steinbeck, Reinhold; Bhargava, Tina; Kerns, Charles; Engel, Claudia; Levtov, Ruti


Learning to Collaborate: Designing Collaboration in a 3-D Game Environment  

ERIC Educational Resources Information Center

To respond to learning needs, Computer-Supported Collaborative Learning (CSCL) must provide instructional support. The particular focus of this paper is on designing collaboration in a 3-D virtual game environment intended to make learning more effective by promoting student opportunities for interaction. The empirical experiment eScape, which…

Hamalainen, Raija; Manninen, Tony; Jarvela, Sanna; Hakkinen, Paivi



Collaborative Rhetorical Structure: A Discourse Analysis Method for Analyzing Student Collaborative Inquiry via Computer Conferencing  

ERIC Educational Resources Information Center

Various formats of online discussion have proven valuable for enhancing learning and collaboration in distance and blended learning contexts. However, despite their capacity to reveal essential processes in collaborative inquiry, current mainstream analytical frameworks, such as the cognitive presence framework (Garrison, Anderson, & Archer, 2001)…

Kou, Xiaojing



Developing and implementing an effective framework for collaboration: the experience of the CS2day collaborative.  


Organizations from varied sectors have pursued collaboration to better fulfill their missions, facilitate decision making, solve more complex problems, and respond more rapidly to a changing environment. While these benefits are evident through the products and services provided, few organizations evaluate the factors that contribute to the success or failure of the collaboration itself. The CS2day Collaborative was formed by 9 separate organizations with a common goal of increasing smoking quit rates through health care professional education. To better understand the factors that influence successful collaboration, the authors applied criteria established by the Wilder Foundation to the functioning of this health care education collaborative. Factors analyzed include the influence of the environment, membership, process and structure, communication, purpose, and resources. Factors relevant to continuing medical education/continuing professional development (CME/CPD) including accreditation, conflict of interest resolution and management, guideline dissemination, continuous assessment and interprofessional education influenced the collaborative structure. Specific examples provided illustrate how diverse organizations can work together effectively to address a public health need. While the CS2day Collaborative was not formed with prior knowledge of these factors, they provide a useful framework for examining how this collaborative was developed and has operated. PMID:22190096

Ales, Mary W; Rodrigues, Shelly B; Snyder, Robyn; Conklin, Mary



A Collaborative Digital Library for Children: A Descriptive Study of Children's Collaborative Behavior and Dialogue  

E-print Network

Over the last three years, we have been developing a collaborative digital library interface where two concerning animals. This technology, called "SearchKids" leverages our lab's past work in co in the digital library. In this study, half the children had to "confirm" their collaborative activities (e

Golbeck, Jennifer


A Collaborative Digital Library for Children: A Descriptive Study of Children's Collaborative Behavior and Dialogue  

E-print Network

Over the last three years, we have been developing a collaborative digital library interface where two concerning animals. This technology, called ``SearchKids'' leverages our lab's past work in co in the digital library. In this study, half the children had to ``confirm'' their collaborative activities (e

Golbeck, Jennifer


A new security model for collaborative environments  

SciTech Connect

Prevalent authentication and authorization models for distributed systems provide for the protection of computer systems and resources from unauthorized use. The rules and policies that drive the access decisions in such systems are typically configured up front and require trust establishment before the systems can be used. This approach does not work well for computer software that moderates human-to-human interaction. This work proposes a new model for trust establishment and management in computer systems supporting collaborative work. The model supports the dynamic addition of new users to a collaboration with very little initial trust placed into their identity and supports the incremental building of trust relationships through endorsements from established collaborators. It also recognizes the strength of a users authentication when making trust decisions. By mimicking the way humans build trust naturally the model can support a wide variety of usage scenarios. Its particular strength lies in the support for ad-hoc and dynamic collaborations and the ubiquitous access to a Computer Supported Collaboration Workspace (CSCW) system from locations with varying levels of trust and security.

Agarwal, Deborah; Lorch, Markus; Thompson, Mary; Perry, Marcia



Tools and collaborative environments for bioinformatics research  

PubMed Central

Advanced research requires intensive interaction among a multitude of actors, often possessing different expertise and usually working at a distance from each other. The field of collaborative research aims to establish suitable models and technologies to properly support these interactions. In this article, we first present the reasons for an interest of Bioinformatics in this context by also suggesting some research domains that could benefit from collaborative research. We then review the principles and some of the most relevant applications of social networking, with a special attention to networks supporting scientific collaboration, by also highlighting some critical issues, such as identification of users and standardization of formats. We then introduce some systems for collaborative document creation, including wiki systems and tools for ontology development, and review some of the most interesting biological wikis. We also review the principles of Collaborative Development Environments for software and show some examples in Bioinformatics. Finally, we present the principles and some examples of Learning Management Systems. In conclusion, we try to devise some of the goals to be achieved in the short term for the exploitation of these technologies. PMID:21984743

Giugno, Rosalba; Pulvirenti, Alfredo



Towards Efficient Collaboration in Cyber Security  

SciTech Connect

Cyber security analysts in different geographical and organizational domains are often largely tasked with similar duties, albeit with domain-specific variations. These analysts necessarily perform much of the same work independently— for instance, analyzing the same list of security bulletins released by largely the same set of software vendors. As such, communication and collaboration between such analysts would be mutually beneficial to the analysts involved, potentially reducing redundancy and offering the opportunity to preemptively alert each other to high-severity security alerts in a more timely fashion. However, several barriers to practical and efficient collaboration exist, and as such, no such framework exists to support such efforts. In this paper, we discuss the inherent difficulties which make efficient collaboration between cyber security analysts a difficult goal to achieve. We discuss preliminary ideas and concepts towards a collaborative cyber-security framework currently under development, whose goal is to facilitate analyst collaboration across these boundaries. While still in its early stages, we describe work-in-progress towards achieving this goal, including motivation, functionality, concepts, and a high-level description of the proposed system architecture.

Hui, Peter SY; Bruce, Joseph R.; Fink, Glenn A.; Gregory, Michelle L.; Best, Daniel M.; McGrath, Liam R.; Endert, Alexander



Collaborative robotic team design and integration  

NASA Astrophysics Data System (ADS)

Teams of heterogeneous mobile robots are a key aspect of future unmanned systems for operations in complex and dynamic urban environments, such as that envisions by DARPA's Tactical Mobile Robotics program. Interactions among such team members enable a variety of mission roles beyond those achievable with single robots or homogeneous teams. Key technologies include docking for power and data transfer, marsupial transport and deployment, collaborative team user interface, cooperative obstacle negotiation, distributed sensing, and peer inspection. This paper describes recent results in the integration and evaluation of component technologies within a collaborative system design. Integration considerations include requirement definition, flexible design management, interface control, and incremental technology integration. Collaborative system requirements are derived from mission objectives and robotic roles, and impact system and individual robot design at several levels. Design management is a challenge in a dynamic environment, with rapid evolution of mission objectives and available technologies. The object-oriented system model approach employed includes both software and hardware object representations to enable on- the-fly system and robot reconfiguration. Controlled interfaces among robots include mechanical, behavioral, communications, and electrical parameters. Technologies are under development by several organizations within the TMR program community. The incremental integration and validation of these within the collaborative system architecture reduces development risk through frequent experimental evaluations. The TMR system configuration includes Packbot-Perceivers, Packbot- Effectors, and Throwbots. Surrogates for these robots are used to validate and refine designs for multi-robot interaction components. Collaborative capability results from recent experimental evaluations are presented.

Spofford, John R.; Anhalt, David J.; Herron, Jennifer B.; Lapin, Brett D.



Translating Word Problems into Equations  

NSDL National Science Digital Library

This site shows students how to translate word problems into equations. It gives seven steps, from reading the problem carefully to checking the solution, to creating equations. The lesson moves on to a few simple exercises in which a natural language sentence is translated to an algebraic equation. It then moves on to more elaborate word problems which require students to identify the important data and follows the given seven steps to create and solve the equation. The more complex questions draw on student understanding of geometric formulae. There are six questions at the end for students to test their new knowledge of how to create and solve equations.

Taylor, Sharon



A collaborative approach to fall prevention.  


Collaboration among health-care providers has emerged as a key factor in improving client care. The authors describe the Geriatric Emergency Management-Falls Intervention Team (GEM-FIT) project, a nurse-led research initiative to improve fall prevention in older adults through interdisciplinary collaboration. Public health nurses and occupational therapists assessed participants before and after fall-prevention interventions and fou modest improvements in participant outcomes and reductions in modifiable risk factors. The project resulted in successful collaboration, interdisciplinary teamwork and improved service delivery to participants. Among the challenges were delayed timelines, complex issues outside the project protocol and communication difficulties. The authors, who served on the project team, make recommendations for health-care professionals interested in initiating similar projects. PMID:22128708

Merrett, Angela; Thomas, Patricia; Stephens, Anne; Moghabghab, Rola; Gruneir, Marilyn



Collaborative Product Line Requirements Engineering Using Rationale  

NASA Astrophysics Data System (ADS)

Variability management is the central part of software product line engineering. Due to the separation of domain and application engineering, product line requirements engineeringproduct line requirements engineering encounters several collaboration problems during variability management. These collaboration problems have an additional layer of complexity, in case, product line organizations are geographically distributed. To address the collaboration problems, we propose a new methodology called issue-based variability management, which is based on the extension of variability management using rationale management. In particular, variability meta-model is viewed as a part of rhetorical rationale model. The methodology is explained and evaluated based on a combination of orthogonal variability model (OVM) and a rationale management approach based on questions, options and criteria (QOC).

Thurimella, Anil K.


The Scottish Ten Project: Collaborative Heritage Documentation  

NASA Astrophysics Data System (ADS)

The Scottish Ten project is a five-year initiative of the Scottish Government to digitally document significant heritage sites around the world for future generations both in Scotland and overseas. The project is fundamentally grounded in collaboration and is delivered by Historic Scotland and the Digital Design Studio at Glasgow School of Art, in partnership with CyArk. In addition, the Scottish Ten team collaborate with local partners at each site to deliver products which will be of use to site managers in the ongoing conservation, management and interpretation of their sites. The project utilises diverse 3D data capture methods, as appropriate for each site, but the foundation of the documentation lies in terrestrial laser scanning. This paper explores the collaborations, methodologies and gives brief case studies from one Scottish and one international site.

Wilson, L.; Rawlinson, A.; Mitchell, D. S.; McGregor, H. C.; Parsons, R.