A Citation-Based Ranking of Strategic Management Journals

Rankings of strategy journals are important for authors, readers, and promotion and tenure committees. We present several rankings, based either on the number of articles that cited the journal or the per-article impact. Our analyses cover various periods between 1991 and 2006, for most of which the Strategic Management Journal was in first place and Journal of Economics & Management Strategy (JEMS) second, although JEMS ranked first in certain instances. Long Range Planning and Technology Analysis & Strategic Management also achieve a top position. Strategic Organization makes an impressive entry and achieves a top position in 2003-2006.Journal rankings; Citation analysis; Strategic Management; Academic impact; Strategy

Revealing Compressed Stops Using High-Momentum Recoils

Searches for supersymmetric top quarks at the LHC have been making great progress in pushing sensitivity out to higher mass, but are famously plagued by gaps in coverage around lower-mass regions where the decay phase space is closing off. Within the common stop-NLSP / neutralino-LSP simplified model, the line in the mass plane where there is just enough phase space to produce an on-shell top quark remains almost completely unconstrained. Here, we show that is possible to define searches capable of probing a large patch of this difficult region, with S/B ~ 1 and significances often well beyond 5 sigma. The basic strategy is to leverage the large energy gain of LHC Run 2, leading to a sizable population of stop pair events recoiling against a hard jet. The recoil not only re-establishes a MET signature, but also leads to a distinctive anti-correlation between the MET and the recoil jet transverse vectors when the stops decay all-hadronically. Accounting for jet combinatorics, backgrounds, and imperfections in MET measurements, we estimate that Run 2 will already start to close the gap in exclusion sensitivity with the first few 10s of inverse-fb. By 300/fb, exclusion sensitivity may extend from stop masses of 550 GeV on the high side down to below 200 GeV on the low side, approaching the "stealth" point at m(stop) = m(top) and potentially overlapping with limits from top pair cross section and spin correlation measurements.Comment: 17 pages, 6 figure

Dynamic Model and Control of an Artificial Muscle Based on Contractile Polymers

A dynamic model and control system of an artificial muscle is presented. The artificial muscle is based on a contractile polymer gel which undergoes abrupt volume changes in response to variations in external conditions. The device uses an acid-base reaction to directly convert chemical to mechanical energy. A nonlinear sliding mode control system is proposed to track desired joint trajectories of a single link controlled by two antagonist muscles. Both the model and controller were implemented and produced acceptable tracking performance at 2Hz

Review of Artificial Muscle Based on Contractile Polymers

An artificial muscle with strength and speed equal to that of a human muscle may soon be possible. Polymer gels exhibit abrubt volume changes in response to variations in their external conditions -- shrinking or swelling up to 1000 times their original volume. Through the conversion of chemical or electrical energy into mechanical work, a number of devices have already been constructed which produce forces up to 100N/cm2 and contraction rates on the order of a second. Through the promise of an artificial muscle is real, many fundamental physical and engineering questions remain before the extent or limit of these devices is known

Compatible growth and yield equations for eastern redcedar forest types

The Tennessee Valley Authority (TVA) recognized the need for better resource management on nonindustrial private timberlands. To aid these landowners, the Woodlands Resource Analysis Program (WRAP) was developed. WRAP\u27S purpose is to identify the desires and objectives of a landowner and provide a series of management strategies which can be implemented by the owner. A limitation, however, exists in WRAP\u27S usefulness for eastern redcedar forest types. Because there is a lack of information on growth and yield in these forest types, WRAP\u27S simulators, presently, cannot carry out projections. The purpose of this study was to develop and provide compatible growth and yield equations for eastern redcedar forest types for use in WRAP. The data used in this study were gathered from TVA\u27s continuous forest inventory project. Plot summaries were developed with information divided into the three forest components of: eastern redcedar, pine species, and hardwood species. From this information, equations were fitted to predict the annual per-acre growth rates of total merchantable basal-area, total merchantable cubic-foot volume, and sawtimber basal area for each component. By integration of the growth rate functions, equations to predict the future values of total merchantable basal-area, total merchantable cubic-foot volume, and sawtimber basal-area were developed. Functions were also developed to estimate future cubic-foot volumes of sawtimber from estimates of sawtimber basal-area. Equations were then developed to convert sawtimber cubic-foot volume to board-foot volume yields. Overall accuracy of these equations were as good as projections based on mean growth rates, however no better. The limiting factor was the poor fit of the basal-area growth rate equations. Their fit was poor because the base data were not designed to be used in this type of study. Variables necessary to predict basal area growth rates were not available. Even with their various predictive abilities, these equations can be utilized because there exists no other system of this type to estimate the growth and yield of eastern redcedar forest types

Posttraumatic Stress and Parenting Behaviors: The Mediating Role of Emotion Regulation

Maternal trauma has been linked with problematic parenting, including both harsh and permissive behaviors. However, little is known about mechanisms accounting for this association. The current study examined the potential impact of posttraumatic stress disorder (PTSD) and emotion regulation on dysfunctional parenting behaviors in a sample of community mothers. We hypothesized a mediation model wherein PTSD would be associated with dysfunctional parenting (i.e., lax and overreactive behaviors) indirectly through deficits in maternal emotion regulation. Seventy-eight community mothers of 18- to 36-month-old children were administered the Clinician Administered PTSD Scale for DSM-5 (CAPS-5) and 19 mothers met criteria for PTSD. Mothers also completed self-report measures of difficulties with emotion regulation and maternal laxness and overreactivity in parenting. Results revealed that emotion dysregulation fully mediated relations between PTSD status and lax (but not overreactive) parenting behaviors. Compared to mothers without PTSD, those with PTSD reported greater lax parenting behaviors indirectly through greater emotion dysregulation. Mothers with PTSD may struggle to parent assertively when trauma symptoms interfere with emotion regulation abilities. The current study highlights the need to design interventions focused on helping trauma-exposed mothers manage distress, ultimately aiming to enhance parenting effectiveness and improve child outcomes

Automated Bearing Press

Our group was presented with a challenge to design an automated machine to replace Micro-Vu’s current manual pressing operation. We moved, planned, and scheduled our tasks for the three quarters we will be working on this project by using a Gantt chart. In designing the machine, we generated concepts and used analysis and prototyping to select the most promising ones. Our final design uses a pneumatic press to press the parts, and it includes magazines to hold the parts before pressing, pneumatic actuators to move the parts to and from the pressing location, and a lever to separate the defective parts from the parts within tolerance after they have been pressed. The electrical, pneumatic, and mechanical components of the machine are described, and part drawings and specifications are provided