Factors related to suicidal ideation in adolescents

Includes bibliographical references

Reconstructing Jets and Missing Transverse Energy using the CMS Detector

In 2007, the Large Hadron Collider (LHC) will circulate and collide proton-proton beams for the first time. The Compact Muon Solenoid (CMS) is one of four experiments at the LHC and is entering the final phases of construction and initial phases of commissioning. This report discusses the expected performance of reconstructing jets and missing transverse energy using the CMS Detector. In addition, strategies for calibrating the energy scale using real data are presented

Individual Differences and Usage of Learner Control

Past learner control research has shown discrepant findings for hypothesized learning outcomes. In order to shed light on these inconsistent findings, this study investigated adult learners\u27 use of learner control features in an online training program, and examined the usage in relation to individual differences. A sample of participants recruited from a crowd sourcing website was given a high level of learner control, and their progress was tracked as they completed an online Microsoft Excel training program. It was hypothesized that learner behavior during training partially mediated the relationship between individual differences and learning outcomes in a high learner control training environment. Results indicated that the relationship between cognitive ability and learning outcomes was partially mediated by the usage of learner control features. Hypotheses regarding other individual differences were generally unsupported, possibly due to the context of the study: a voluntary training program completed by adults who were compensated with a relatively small amount of money. Future research on learner control should be conducted on employee samples or in-person

Predicting Score Change: An Empirical Investigation of Cheating on Unproctored Employment Tests

Unproctored internet testing (UIT) is used widely to administer employment tests (Fallaw, Solomonson, & McClelland, 2009), although cognitively loaded tests delivered by UIT are suspected to offer test takers greater opportunities to cheat and increase the risk of test taker cheating (Chapman & Webster, 2003; Tippins et al., 2006; Tippins, 2009). Despite the wide use and suspected cheating concerns, there is a dearth of research investigating cheating on cognitively loaded UITs (Naglieri et al., 2004; Beaty et al., 2011). Based on the lack of theoretically-grounded empirical studies, the current study had two goals: (1) identify which cheating methods are used by test takers to effectively raise test scores and (2) investigate the roles of general cognitive ability and effective cheating methods in raising test scores. To test the specific hypotheses, 340 adult participants recruited from Amazon MTurk completed a UIT used for employee selection first under honest conditions and then under cheating conditions. Results indicated that not all test takers were able to increase their scores by cheating; cheating effectiveness depended upon the interaction between cognitive ability and the use of effective cheating methods. These results suggest that increased cognitive ability may lead to increased cheating effectiveness on selection tests, but that score change is contingent on applicant awareness of appropriate cheating methods for those tests

Earth Observing System (EOS)/Advanced Microwave Sounding Unit A (AMSU-A) configuration management plan

This plan describes methods and procedures Aerojet will follow in the implementation of configuration control for each established baseline. The plan is written in response to the GSFC EOS CM Plan 420-02-02, dated January 1990, and also meets he requirements specified in DOD-STD-480, DOD-D 1000B, MIL-STD-483A, and MIL-STD-490B. The plan establishes the configuration management process to be used for the deliverable hardware, software, and firmware of the EOS/AMSU-A during development, design, fabrication, test, and delivery. This revision includes minor updates to reflect Aerojet's CM policies

Integrated Advanced Sounding Unit-A (AMSU-A). Configuration Management Plan

The purpose of this plan is to identify the baseline to be established during the development life cycle of the integrated AMSU-A, and define the methods and procedures which Aerojet will follow in the implementation of configuration control for each established baseline. Also this plan establishes the Configuration Management process to be used for the deliverable hardware, software, and firmware of the Integrated AMSU-A during development, design, fabrication, test, and delivery

A Large Sample Comparison of Grade Based Student Learning Outcomes in Online vs. Face-to-Face Courses

Comparisons of grade based learning outcomes between online and face-to-face course formats have become essential because the number of online courses, online programs and institutional student enrollments have seen rapid growth in recent years. Overall, online education is largely viewed by education professionals as being equivalent to instruction conducted face-to-face. However, the research investigating student performance in online versus face-to-face courses has been mixed and is often hampered by small samples or a lack of demographic and academic controls. This study utilizes a dataset that includes over 5,000 courses taught by over 100 faculty members over a period of ten academic terms at a large, public, four-year university. The unique scale of the dataset facilitates macro level understanding of course formats at an institutional level. Multiple regression was used to account for student demographic and academic corollaries--factors known to bias course format selection and grade based outcomes--to generate a robust test for differences in grade based learning outcomes that could be attributed to course format. The final model identified a statistical difference between course formats that translated into a negligible difference of less than 0.07 GPA points on a 4 point scale. The primary influence on individual course grades was student GPA. Interestingly, a model based interaction between course type and student GPA indicated a cumulative effect whereby students with higher GPAs will perform even better in online courses (or alternatively, struggling students perform worse when taking courses in an online format compared to a face-to-face format). These results indicate that, given the large scale university level, multi course, and student framework of the current study, there is little to no difference in grade based student performance between instructional modes for courses where both modes are applicable

National trends in total hip arthroplasty for traumatic hip fractures: An analysis of a nationwide all-payer database.

BACKGROUND: Hemiarthroplasty (HA) has traditionally been the treatment of choice for elderly patients with displaced femoral neck fractures. Ideal treatment for younger, ambulatory patients is not as clear. Total hip arthroplasty (THA) has been increasingly utilized in this population however the factors associated with undergoing HA or THA have not been fully elucidated. AIM: To examine what patient characteristics are associated with undergoing THA or HA. To determine if outcomes differ between the groups. METHODS: We queried the Nationwide Inpatient Sample (NIS) for patients that underwent HA or THA for a femoral neck fracture between 2005 and 2014. The NIS comprises a large representative sample of inpatient hospitalizations in the United States. International Classifications of Disease, Ninth Edition (ICD-9) codes were used to identify patients in our sample. Demographic variables, hospital characteristics, payer status, medical comorbidities and mortality rates were compared between the two procedures. Multivariate logistic regression analysis was then performed to identify independent risk factors of treatment utilized. RESULTS: Of the total 502060 patients who were treated for femoral neck fracture, 51568 (10.3%) underwent THA and the incidence of THA rose from 8.3% to 13.7%. Private insurance accounted for a higher percentage of THA than hemiarthroplasty. THA increased most in urban teaching hospitals relative to urban non-teaching hospitals. Mean length of stay (LOS) was longer for HA. The mean charges were less for HA, however charges decreased steadily for both groups. HA had a higher mortality rate, however, after adjusting for age and comorbidities HA was not an independent risk factor for mortality. Interestingly, private insurance was an independent predictor for treatment with THA. CONLUSION: There has been an increase in the use of THA for the treatment of femoral neck fractures in the United States, most notably in urban hospitals. HA and THA are decreasing in total charges and LOS

Virtual Data in CMS Analysis

The use of virtual data for enhancing the collaboration between large groups of scientists is explored in several ways: - by defining ``virtual'' parameter spaces which can be searched and shared in an organized way by a collaboration of scientists in the course of their analysis; - by providing a mechanism to log the provenance of results and the ability to trace them back to the various stages in the analysis of real or simulated data; - by creating ``check points'' in the course of an analysis to permit collaborators to explore their own analysis branches by refining selections, improving the signal to background ratio, varying the estimation of parameters, etc.; - by facilitating the audit of an analysis and the reproduction of its results by a different group, or in a peer review context. We describe a prototype for the analysis of data from the CMS experiment based on the virtual data system Chimera and the object-oriented data analysis framework ROOT. The Chimera system is used to chain together several steps in the analysis process including the Monte Carlo generation of data, the simulation of detector response, the reconstruction of physics objects and their subsequent analysis, histogramming and visualization using the ROOT framework.Comment: Talk from the 2003 Computing in High Energy and Nuclear Physics (CHEP03), La Jolla, Ca, USA, March 2003, 9 pages, LaTeX, 7 eps figures. PSN TUAT010. V2 - references adde