Home About us Contact
|
Home About us Contact | ||
|
|
||
Today's Technology (today + technology)
Selected AbstractsNonrobustness of the normal approximation of lead-time demand in a (Q, R) systemNAVAL RESEARCH LOGISTICS: AN INTERNATIONAL JOURNAL, Issue 2 2003Hon-Shiang Lau For computing an optimal (Q, R) or kindred inventory policy, the current literature provides mixed signals on whether or when it is safe to approximate a nonnormal lead-time-demand ("LTD") distribution by a normal distribution. The first part of this paper examines this literature critically to justify why the issue warrants further investigations, while the second part presents reliable evidence showing that the system-cost penalty for using the normal approximation can be quite serious even when the LTD-distribution's coefficient of variation is quite low,contrary to the prevalent view of the literature. We also identify situations that will most likely lead to large system-cost penalty. Our results indicate that, given today's technology, it is worthwhile to estimate an LTD-distribution's shape more accurately and to compute optimal inventory policies using statistical distributions that more accurately reflect the LTD-distributions' actual shapes. © 2003 Wiley Periodicals, Inc. Naval Research Logistics, 2003 [source] Computer Addiction: Implications for Nursing Psychotherapy PracticePERSPECTIVES IN PSYCHIATRIC CARE, Issue 4 2005Diane M. Wieland PhD TOPIC.,Nurse psychotherapists will encounter the impact of today's technology on the daily lives of people including computer addiction. Computer addiction may also present with comorbidities such as depression, gambling, substance abuse, and marital infidelity and divorce. PURPOSE.,This overview article presents what is currently documented in the literature regarding the incidence, symptomatology, and nursing psychotherapy interventions relevant to computer addiction and its treatment. Issues presented include computer addiction, virtual relationships, online marital infidelity, and compulsive online sexual behavior. SOURCES.,Review of literature from Medline, Psychoinfo, CINAHL, and current texts. CONCLUSIONS., Given the increased use of computers in today's society, there is the potential for overuse of technology and neglect of others and self as a result of computer addiction. Computer disorders also present themselves as marital or couple discord with the potential for online extramarital affairs and compulsive sexual online behavior. A summary and an assessment tool are provided to guide the nurse psychotherapist in practice. [source] Parallel, distributed and GPU computing technologies in single-particle electron microscopyACTA CRYSTALLOGRAPHICA SECTION D, Issue 7 2009Martin Schmeisser Most known methods for the determination of the structure of macromolecular complexes are limited or at least restricted at some point by their computational demands. Recent developments in information technology such as multicore, parallel and GPU processing can be used to overcome these limitations. In particular, graphics processing units (GPUs), which were originally developed for rendering real-time effects in computer games, are now ubiquitous and provide unprecedented computational power for scientific applications. Each parallel-processing paradigm alone can improve overall performance; the increased computational performance obtained by combining all paradigms, unleashing the full power of today's technology, makes certain applications feasible that were previously virtually impossible. In this article, state-of-the-art paradigms are introduced, the tools and infrastructure needed to apply these paradigms are presented and a state-of-the-art infrastructure and solution strategy for moving scientific applications to the next generation of computer hardware is outlined. [source] The role of biomass in America's energy future: framing the analysisBIOFUELS, BIOPRODUCTS AND BIOREFINING, Issue 2 2009Lee R. Lynd Abstract The Role of Biomass in America's Energy Future (RBAEF) project, initiated during the first half of 2003, has sought to identify and evaluate paths by which biomass can make a large contribution to energy services and determine means to accelerate biomass energy use. In addressing these issues, the study has focused on future, mature, technologies rather than today's technology. This perspective , the first of eight papers that comprise this issue , introduces the project, providing an operative definition of and method for estimating mature technology, a rationale for choosing the model feedstock, a list of the conversion technologies considered, and as a point of reference, a brief overview of the energy flows through a typical petroleum refinery. The subsequent papers are introduced as well. © 2009 Society of Chemical Industry and John Wiley & Sons, Ltd [source] | ||||||||||