Applying Altman\u27s Z-Score in the Classroom

Altman\u27s Z-score is introduced in an Excel framework to produce a quick calculation of the Z-score with actual financial data available through the Internet. The lesson plan developed is easily introduced with topics covering ratio analysis, financial risk, bond rating changes, and bankruptcy. Given the wide use of the Z-score in practice to evaluate credit risk (or bankruptcy risk), the lesson plan produces a skill set that is very marketable

Social Security Decisions: Should Recipients Opt for Early Payments?

Two Excel-based templates are developed to help determine when it is optimal for starting to receive monthly social security benefits. The decision information accounts for uncertain life expectancy by implementing a rate of return that should be set, at a minimum, to the individual’s expected return on investments or based on a metric provided in the article that considers potential life expectancy. Key Takeaways: Excel templates allow for a comparison of receiving lower monthly social security benefits at an earlier age versus waiting for higher monthly benefits at a later age. A “reserve rule of 72” metric allows for adjustments on comparing the different social security payment structures based on life expectancy. Other adjustments for comparing the different social security structures can made for those who work while receiving benefits

Required Minimum Distribution (RMD) Spreadsheet Calculators Based on the SECURE Act of 2019

The Setting Every Community Up for Retirement Enhancement Act (SECURE Act) of 2019 made significant changes to the required minimum distribution (RMD) schedule for individual retirement accounts (IRAs) and defined contribution retirement plans. Excel spreadsheet calculators are developed to calculate annual RMD cash flows throughout retirement for those who are retired and for those who are planning to retire. Unlike internet calculators, the spreadsheet calculators allow savings to earn monthly interest throughout retirement. Further, the calculators are easy to use and allow individuals to forecast long horizon RMD distributions for subsequent tax or reinvestment planning purposes

Required Minimum Distribution (RMD) Spreadsheet Calculators Based on the SECURE Act of 2022

Required Minimum Distribution (RMD) Spreadsheet Calculators Based on the SECURE Act of 2022 The Setting Every Community Up for Retirement Enhancement Act (SECURE Act) of 2022 made a second round of changes (relative to the SECURE Act of 2019) to the required minimum distribution (RMD) schedule for individual retirement accounts (IRAs) and defined contribution retirement plans. Excel spreadsheet calculators are developed to calculate the new annual RMD cash flows throughout retirement for those who are retired and for those who are planning to retire. The spreadsheet calculators also allow savings to accrue with interest if the RMD is in excess of expected annual costs. KEY TAKEAWAYS: The spreadsheet calculators require only basic inputs and can be updated and applied at any point in time during the planning period. The spreadsheet calculators allow for interest to accumulate before and after retirement in the IRA and in a savings account if the RMD is in excess of expected annual costs. The spreadsheet calculators allow for additional monthly contributions up to retirement

Non-local heat transport in Alcator C-Mod ohmic L-mode plasmas

Non-local heat transport experiments were performed in Alcator C-Mod ohmic L-mode plasmas by inducing edge cooling with laser blow-off impurity (CaF2) injection. The non-local effect, a cooling of the edge electron temperature with a rapid rise of the central electron temperature, which contradicts the assumption of 'local' transport, was observed in low collisionality linear ohmic confinement (LOC) regime plasmas. Transport analysis shows this phenomenon can be explained either by a fast drop of the core diffusivity, or the sudden appearance of a heat pinch. In high collisionality saturated ohmic confinement (SOC) regime plasmas, the thermal transport becomes 'local': the central electron temperature drops on the energy confinement time scale in response to the edge cooling. Measurements from a high resolution imaging x-ray spectrometer show that the ion temperature has a similar behaviour as the electron temperature in response to edge cooling, and that the transition density of non-locality correlates with the rotation reversal critical density. This connection may indicate the possible connection between thermal and momentum transport, which is also linked to a transition in turbulence dominance between trapped electron modes (TEMs) and ion temperature gradient (ITG) modes. Experiments with repetitive cold pulses in one discharge were also performed to allow Fourier analysis and to provide details of cold front propagation. These modulation experiments showed in LOC plasmas that the electron thermal transport is not purely diffusive, while in SOC the electron thermal transport is more diffusive like. Linear gyrokinetic simulations suggest the turbulence outside r/a = 0.75 changes from TEM dominance in LOC plasmas to ITG mode dominance in SOC plasmas.United States. Dept. of Energy (DoE Contract No DE-FC02-99ER54512)Oak Ridge Institute for Science and Education (DOE Fusion Energy Postdoctoral Research Program

20 years of research on the Alcator C-Mod tokamak

The object of this review is to summarize the achievements of research on the Alcator C-Mod tokamak [Hutchinson et al., Phys. Plasmas 1, 1511 (1994) and Marmar, Fusion Sci. Technol. 51, 261 (2007)] and to place that research in the context of the quest for practical fusion energy. C-Mod is a compact, high-field tokamak, whose unique design and operating parameters have produced a wealth of new and important results since it began operation in 1993, contributing data that extends tests of critical physical models into new parameter ranges and into new regimes. Using only high-power radio frequency (RF) waves for heating and current drive with innovative launching structures, C-Mod operates routinely at reactor level power densities and achieves plasma pressures higher than any other toroidal confinement device. C-Mod spearheaded the development of the vertical-target divertor and has always operated with high-Z metal plasma facing components—approaches subsequently adopted for ITER. C-Mod has made ground-breaking discoveries in divertor physics and plasma-material interactions at reactor-like power and particle fluxes and elucidated the critical role of cross-field transport in divertor operation, edge flows and the tokamak density limit. C-Mod developed the I-mode and the Enhanced Dα H-mode regimes, which have high performance without large edge localized modes and with pedestal transport self-regulated by short-wavelength electromagnetic waves. C-Mod has carried out pioneering studies of intrinsic rotation and demonstrated that self-generated flow shear can be strong enough in some cases to significantly modify transport. C-Mod made the first quantitative link between the pedestal temperature and the H-mode's performance, showing that the observed self-similar temperature profiles were consistent with critical-gradient-length theories and followed up with quantitative tests of nonlinear gyrokinetic models. RF research highlights include direct experimental observation of ion cyclotron range of frequency (ICRF) mode-conversion, ICRF flow drive, demonstration of lower-hybrid current drive at ITER-like densities and fields and, using a set of novel diagnostics, extensive validation of advanced RF codes. Disruption studies on C-Mod provided the first observation of non-axisymmetric halo currents and non-axisymmetric radiation in mitigated disruptions. A summary of important achievements and discoveries are included.United States. Dept. of Energy (Cooperative Agreement DE-FC02-99ER54512)United States. Dept. of Energy (Cooperative Agreement DE-FG03-94ER-54241)United States. Dept. of Energy (Cooperative Agreement DE-AC02-78ET- 51013)United States. Dept. of Energy (Cooperative Agreement DE-AC02-09CH11466)United States. Dept. of Energy (Cooperative Agreement DE-FG02-95ER54309)United States. Dept. of Energy (Cooperative Agreement DE-AC02-05CH11231)United States. Dept. of Energy (Cooperative Agreement DE-AC52-07NA27344)United States. Dept. of Energy (Cooperative Agreement DE-FG02- 97ER54392)United States. Dept. of Energy (Cooperative Agreement DE-SC00-02060

ACC/AHA guideline update for the management of patients with unstable angina and non-ST-segment elevation myocardial infarction - 2002: Summary article: A report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Committee on the Management of Patients with Unstable Angina)

The American College of Cardiology (ACC)/American Heart Association (AHA) guidelines for the management of unstable angina and non–ST-segment elevation myocardial infarction (UA/NSTEMI) were published in September 2000.1 Since then, a number of clinical trials and observational studies have been published or presented that, when taken together, alter significantly the recommendations made in that document. Therefore, the ACC/AHA Committee on the Management of Patients With Unstable Angina, with the concurrence of the ACC/AHA Task Force on Practice Guidelines, revised these guidelines. These revisions were prepared in December 2001, reviewed and approved, and then published on the ACC World Wide Web site (www.acc.org) and AHA World Wide Web site (www.americanheart.org) on March 15, 2002. The present article describes these revisions and provides further updates in this rapidly moving field. Minor clarifications in the wording of three recommendations that now appear differently from those that were previously published on the ACC and AHA Web sites are noted in footnotes