The Effects of Environment Dynamism and Heterogeneity on Salespeople\u27s Role Perceptions, Performance and Job Satisfaction

This article develops a structural equations model which examines the effects of environmental dynamism and heterogeneity on salespeople’s role conflict, role ambiguity, performance and job satisfaction. The model is tested with EQS, using data collected from 230 salespeople in multiple companies and industries. Indicates that environmental dynamism reduces satisfaction and performance, and increases role conflict and ambiguity. Notes that environmental heterogeneity also reduces performance and increases role conflict, but does not have a significant effect on role ambiguity

A Quantitative Framework for Automated Pre-Execution Thread Selection

Pre-execution attacks cache misses for which conventional address-prediction driven prefetching is ineffective. In pre-execution, copies of cache miss computations are isolated from the main program and launched as separate threads called p-threads whenever the processor anticipates an upcoming miss. P-thread selection is the task of deciding what computations should execute on p-threads and when they should be launched such that total execution time is minimized. P-thread selection is central to the success of pre-execution. We introduce a framework for automated static p-thread selection, a static p-thread being one whose dynamic instances are repeatedly launched during the course of program execution. Our approach is to formalize the problem quantitatively and then apply standard techniques to solve it analytically. The framework has two novel components. The slice tree is a new data structure that compactly represents the space of all possible static p-threads. Aggregate advantage is a formula that uses raw program statistics and computation structure to assign each candidate static p-thread a numeric score based on estimated latency tolerance and overhead aggregated over its expected dynamic executions. Our framework finds the set of p-threads whose aggregate advantages sum to a maximum. The framework is simple and intuitively parameterized to model the salient microarchitecture features. We apply our framework to the task of choosing p-threads that cover L2 cache misses. Using detailed simulation, we study the effectiveness of our framework, and pre-execution in general, under difference conditions. We measure the effect of constraining p-thread length, of adding localized optimization to p-threads, and of using various program samples as a statistical basis for the p-thread selection, and show that our framework responds to these changes in an intuitive way. In the microarchitecture dimension, we measure the effect of varying memory latency and processor width and observe that our framework adapts well to these changes. Each experiment includes a validation component which checks that the formal model presented to our framework correctly represents actual execution

The curvilinear and conditional effects of product line breadth on salesperson performance, role stress, and job satisfaction

The impact of how product line breadth affects a salesperson is unclear in the existing literature. While numerous product lines can provide certain benefits to the salesperson, they may also have a dark side. This research examines the impact of number product lines handled by the salespeople on their performance, role stress, and job satisfaction. Based on role and schema theories, we test a series of curvilinear and conditional effects, using data collected from salespeople across multiple industries. Our analysis indicates non-linear relationships between number of product lines handled by the salesperson and salesperson performance and role stress. Further, these relationships are contingent on the complexity of products, complementarity of product lines, and lines acquired through mergers and acquisitions. These results show the complex effects of product lines on the salesperson and recognize both the benefits and drawbacks of product line breadth

Evaluation of self-medication prevalence, diagnosis and prescription in migraine in Kerman, Iran

Objective: To investigate different diagnosis aspects, prescribed drugs and self-medications of migraine in Iran. Methods: We selected 210 migraineurs from high school and university students in Kerman, Iran over a period of 6 months in 2002 by multistage randomized screening based on the International Headache Society criteria. We classified them into 2 groups on the basis of whether they had consulted a physician or not. We then evaluated the physician prescriptions, and prevalence of self-medications. Results: Only 49 of migraineurs consulted a physician, and only 53 were correctly diagnosed by physicians according to the International Headache Society criteria. Our study shows that 69 of general practitioners diagnoses were wrong. In spite of indications for prophylactic treatment, it was not prescribed in 76 of the patients, and 50 of the general practitioners prescribed it without any indications. Furthermore, 91 of patients used self-medication; Acetaminophen and Codeine were the most common. Conclusion: General practitioners' misdiagnosis and mismanagement of the migraineurs, and easy access to various drugs in Iran, have led to a high rate of self-medication. Self-medication with Codeine, with regard to its side effects, such as increase of secondary headaches and dependency is the major problem. Consequently, medical education systems, physician reevaluating methods, and the concept of self-medication among patients have to be revised

Black and minority ethnic group involvement in health and social care research: a systematic review

BACKGROUND: Patient and public involvement (PPI) in research is growing internationally, but little is known about black and minority ethnic (BME) involvement and the factors influencing their involvement in health and social care research. OBJECTIVES: To characterize and critique the empirical literature on BME-PPI involvement in health and social care research. SEARCH STRATEGY: Systematic searches of six electronic bibliographic databases were undertaken, utilizing both MeSH and free-text terms to identify international empirical literature published between 1990 and 2016. INCLUSION CRITERIA: All study designs that report primary data that involved BME groups in health or social care research. Screening was conducted by two reviewers. DATA EXTRACTION AND SYNTHESIS: Data extraction and quality appraisal were performed independently. Data extraction focused on the level(s) of PPI involvement and where PPI activity occurred in the research cycle. Studies were quality-assessed using the guidelines for measuring the quality and impact of user involvement in research. Data were analysed using a narrative approach. MAIN RESULTS: Forty-five studies were included with the majority undertaken in the USA focusing on African Americans and indigenous populations. Involvement most commonly occurred during the research design phase and least in data analysis and interpretation. CONCLUSION: This is the first systematic review investigating BME involvement in health and social care research internationally. While there is a widespread support for BME involvement, this is limited to particular phases of the research and particular ethnic subgroups. There is a need to understand factors that influence BME involvement in all parts of the research cycle

Mixed-mode multicore reliability

Future processors are expected to observe increasing rates of hardware faults. Using Dual-Modular Redundancy (DMR), two cores of a multicore can be loosely coupled to redundantly execute a single software thread, providing very high coverage from many difference sources of faults. This reliability, however, comes at a high price in terms of per-thread IPC and overall system throughput. We make the observation that a user may want to run both applications requiring high reliability, such as financial software, and more fault tolerant applications requiring high performance, such as media or web software, on the same machine at the same time. Yet a traditional DMR system must fully operate in redundant mode whenever any application requires high reliability. This paper proposes a Mixed-Mode Multicore (MMM), which enables most applications, including the system software, to run with high reliability in DMR mode, while applications that need high performance can avoid the penalty of DMR. Though conceptually simple, two key challenges arise: 1) care must be taken to protect reliable applications from any faults occurring to applications running in high performance mode, and 2) the desire to execute additional independent software threads for a performance application complicates the scheduling of computation to cores. After solving these issues, an MMM is shown to improve overall system performance, compared to a traditional DMR system, by approximately 2X when one reliable and one performance application are concurrently executing

Interest Domination as a Framework for Exploring Channel Changes in Transitional Economies

Changes in political and economic power can affect channel structures and decisions. Western channel models may not be useful for understanding the process of change in Central and East European transforming economies. This discussion suggests that channels in transforming economies may be controlled by groups or networks of people with mutual interests, a phenomenon the authors call interest domination. The article examines interest domination by managers, Communist cadres, and other party elite in two transforming economies and describes how structural and behavioral components of command economies might be conducive to interest domination of marketing channels. Propositions for explaining the political, social, and economic factors that sustain interest domination and contribute to change in interest-dominated channels are offered. Examples from Hungary and Tajikistan are used to provide context for the discussion

Interest Domination as a Framework for Exploring Channel Changes in Transitional Economies

Changes in political and economic power can affect channel structures and decisions. Western channel models may not be useful for understanding the process of change in Central and East European transforming economies. This discussion suggests that channels in transforming economies may be controlled by groups or networks of people with mutual interests, a phenomenon the authors call interest domination. The article examines interest domination by managers, Communist cadres, and other party elite in two transforming economies and describes how structural and behavioral components of command economies might be conducive to interest domination of marketing channels. Propositions for explaining the political, social, and economic factors that sustain interest domination and contribute to change in interest-dominated channels are offered. Examples from Hungary and Tajikistan are used to provide context for the discussion

Aspects of topology of condensates and knotted solitons in condensed matter systems

The knotted solitons introduced by Faddeev and Niemi is presently a subject of great interest in particle and mathematical physics. In this paper we give a condensed matter interpretation of the recent results of Faddeev and Niemi.Comment: v2: Added a reference to the paper E. Babaev, L.D. Faddeev and A.J. Niemi cond-mat/0106152 where an exact equivalence was shown between the two-condensate Ginzburg-Landau model and a version of Faddeev model. Miscelaneous links related to knotted solitons are available at the author homepage at http://www.teorfys.uu.se/PEOPLE/egor/ . Animations of knotted solitons by Hietarinta and Salo are available at http://users.utu.fi/h/hietarin/knots/c45_p2.mp