Search results

In this commentary, I highlight a few of the assertions made by McDaniel et al. (2013) about the importance of complexity science guided management practices, and extend these ideas specifically to how we might think about reducing seemingly intractable problems in health care such as patient safety, patient falls, hospital acquired infection, and the rise of chronic illness and obesity. I suggest that such changes will require managers and providers to view health care organizations and patients as complex adaptive systems and include patients as full participants in co-producing their health care.

Although it is widely acknowledged that health care delivery systems are complex adaptive systems, there are gaps in understanding the application of systems engineering approaches to systems analysis and redesign in the health care domain. Commonly employed methods, such as statistical analysis of risk factors and outcomes, are simply not adequate to robustly characterize all system requirements and facilitate reliable design of complex care delivery systems. This is especially apparent in institutional-level systems, such as patient safety programs that must mitigate the risk of infections and other complications that can occur in virtually any setting providing direct and indirect patient care. The case example presented here illustrates the application of various system engineering methods to identify requirements and intervention candidates for a critical patient safety problem known as failure to rescue. Detailed descriptions of the analysis methods and their application are presented along with specific analysis artifacts related to the failure to rescue case study. Given the prevalence of complex systems in health care, this practical and effective approach provides an important example of how systems engineering methods can effectively address the shortcomings in current health care analysis and design, where complex systems are increasingly prevalent.

This paper gives the background to the measurement of metal cutting temperatures and a review of the practicality of the various methods of measuring cutting temperature while machining metals.

The review was compiled after a literature search, visits to other research establishments and discussions with other researchers in the machining/temperature measurement field.

Information about several methods of measuring cutting temperature during a machining process is given along with the limitations of the use of each method.

All the temperature measurement methods discussed have their limitations and these are described for each method listed.

The paper provides a review of all the cutting temperature measurement methods discovered in recent work. This will be a reference document of interest to others working in this field.

This paper aims to examine the use of a commercial pyrometer to measure the surface temperature of workpieces as machining takes place. The pyrometer readings are to be compared with model predictions.

The pyrometer was mounted on an industrial milling machine and the temperature of the workpiece was measured behind the cutting tool as it traversed the workpiece. A mathematical spreadsheet model was used to predict the temperatures at the point measured by the pyrometer and at the point where cutting took place.

It was found by selecting the “partition ratio” of the power being transmitted to the workpiece that agreement could be found between measured and predicted results.

The work was mainly carried out on aluminium samples, which exhibited low cutting temperatures.

The paper describes a method of finding the partition ratio of heat going into the workpiece.

The purpose of this paper is to develop an integrated approach for a green product cradle-to-cradle (C2C) fuzzy recycling production planning model.

This paper applies the failure mode and effects analysis technique and Taguchi experimental design method, develops a green product C2C performance evaluation system that considers the fuzzy impacts of environmental laws and regulations, green goodwill, and environmental efficiency of targeting countries, and decides both the optimal green production plan and estimated optimal life cycles.

This study compares the different degree of maturity in environmental regulations, and various recycling situations are simulated to demonstrate the successful applicability of the proposed model as well as the incentive policy for Taiwan, the USA and Bangladesh.

Previous studies failed both to develop a holistic recycling production plan which is able to consider both the optimal combination of recycled components used and final green products produced with the maximum total resultant sales profit and to consider the potential failure phenomenon of recycled components adopted in the final product. Furthermore, most prior studies ignored the influence of environmental law, goodwill of the product and the efficiency of recycling mechanism of the community.

Osteoporosis is increasingly affecting the young female adults of the Iranian population. The role of nutrition and physical activity on bone mineral content (BMC) and bone mineral density (BMD) in young female students has not been fully examined. This study aims to assess the dietary intake of several nutrients, such as calcium, phosphorus and protein; serum concentrations of vitamin D; and physical activity and their relationship with BMC and BMD in young female students.

Three-day dietary intakes of 67 female students were measured via duplicate portion sampling (DPS) method. Calcium and phosphorus content of the food samples were determined using atomic absorption spectrophotometer. Protein intake was determined by Kjeldahl method. Serum 25(OH) D concentrations were measured using enzyme-linked immunosorbent assay. Lumbar spine and femoral neck BMD were measured using dual-energy X-ray absorptiometry (DEXA).

The mean ±SD dietary intake of protein, calcium and phosphorus was 58.8 ± 16.9 g/day, 388 ± 135 mg/day and 1884 ± 682 mg/day, respectively. Significant positive correlation was found between serum vitamin 25(OH) D concentrations and BMC of lumbar spine (r = 0.28, p = 0.016) and BMD of femoral neck (r = 0.29, p = 0.016). Moreover, the authors observed a significant positive correlation between physical activity and femoral neck BMC (r = 0.26, p = 0.03) and BMD (r = 0.28, p = 0.02). This study found no significant associations between dietary intakes of protein, calcium and phosphorus and bone density measurements.

In this study, the authors measured the dietary intake of protein, calcium and phosphorus using DPS method. This study highlights the role of physical activity and serum vitamin 25(OH) D concentrations in female students’ bone health.

Presents a bibliography of literature published during 2001 on library instruction and information literacy. States that the majority of articles dealt with the implementation of the Association of College and Research Libraries standards for information literacy in higher education. Reveals that another theme is that students are increasingly turning to the Web for their information needs to the exclusion of other sources which has implications for those who teach those resources. Also reveals the theme in the literature of collaboration and partnerships between faculty, information technology staff, other librarians, students and administrators.

We discuss the impact of complexity science on the design and management of health care organizations over the past decade. We provide an overview of complexity science issues and their impact on thinking about health care systems, particularly with the rising importance of information systems. We also present a complexity science perspective on current issues in today’s health care organizations and suggest ways that this perspective might help in approaching these issues.

We review selected research, focusing on work in which we participated, to identify specific examples of applications of complexity science. We then take a look at information systems in health care organizations from a complexity viewpoint.

Complexity science is a fundamentally different way of understanding nature and has influenced the thinking of scholars and practitioners as they have attempted to understand health care organizations. Many scholars study health care organizations as complex adaptive systems and through this perspective develop new management strategies. Most important, perhaps, is the understanding that attention to relationships and interdependencies is critical for developing effective management strategies.

Increased understanding of complexity science can enhance the ability of researchers and practitioners to develop new ways of understanding and improving health care organizations.

This analysis opens new vistas for scholars and practitioners attempting to understand health care organizations as complex adaptive systems. The analysis holds value for those already familiar with this approach as well as those who may not be as familiar.