Evaluating demand driven MRP: a case based simulated study

This study evaluates the assumption underpinning Material Requirements Planning (MRP), buffer management and DDMRP before analysing the case company and evaluating the potential benefits, utilizing simulated data from the existing ERP system. The purpose of this research is to evaluate DDMRP in the context of improving the performance of a printing ink manufacturing company. The main issues the company is facing using a traditional MRP system include poor due-date performance, stock levels not corresponding to the actual market needs and overall system instability leading to inefficiencies. The findings indicate the potential of DDMRP to improve system stability and product availability

Delay in diabetic retinopathy screening increases the rate of detection of referable diabetic retinopathy

Aims - To assess whether there is a relationship between delay in retinopathy screening after diagnosis of Type 2 diabetes and level of retinopathy detected. Methods - Patients were referred from 88 primary care practices to an English National Health Service diabetic eye screening programme. Data for screened patients were extracted from the primary care databases using semi-automated data collection algorithms supplemented by validation processes. The programme uses two-field mydriatic digital photographs graded by a quality assured team. Results - Data were available for 8183 screened patients with diabetes newly diagnosed in 2005, 2006 or 2007. Only 163 with Type 1 diabetes were identified and were insufficient for analysis. Data were available for 8020 with newly diagnosed Type 2 diabetes. Of these, 3569 were screened within 6 months, 2361 between 6 and 11 months, 1058 between 12 and 17 months, 366 between 18 and 23 months, 428 between 24 and 35 months, and 238 at 3 years or more after diagnosis. There were 5416 (67.5%) graded with no retinopathy, 1629 (20.3%) with background retinopathy in one eye, 753 (9.4%) with background retinopathy in both eyes and 222 (2.8%) had referable diabetic retinopathy. There was a significant trend (P = 0.0004) relating time from diagnosis to screening detecting worsening retinopathy. Of those screened within 6 months of diagnosis, 2.3% had referable retinopathy and, 3 years or more after diagnosis, 4.2% had referable retinopathy. Conclusions - The rate of detection of referable diabetic retinopathy is elevated in those who were not screened promptly after diagnosis of Type 2 diabetes

Organizing (Eternal) Identity and Identification: An Upward Glance into Religious Institutions

This dissertation disrupts at least two religious spaces: First, scholars religiously adhering to (social) scientific norms, and second, people identifying with religious organizations (i.e., churches). First, we begin constructing a theoretical lens using poststructural ideas offered by Foucault, Derrida, and Bakhtin to read and disrupt (religious) discourse. Second, we complicate organizational identification as a concept, deeming it fixed and fluid—a paradox within religious discourses that endorse Truth and Perfection. Here, we draw from the communication constitutes organization (CCO) approach. Third, we further curate the lens by applying poststructuralism, identification, and CCO in a specific context: The Church of Jesus Christ of Latter-day Saints (The Church). Doing so enables Restorationism—a fixed-fluid theoretical technique for scrutinizing identification paradoxes in religious spaces. Fourth, we try Restorationism on 89 addresses to reveal contradictions of organizational identification within The Church, followed by discussions of the (dis)organizing effect of language, including Scripture, on identity. Throughout the dissertation, we challenge (social) scientific norms—faithful to postmodernism—through performance techniques, including poetry, courtroom scenes, images, metaphors, and embodied discussions. Doing so, along with speculations on (religious organizational) identification, rouses at least three questions, including (1) who am I; (2) where did I come from; and (3) where am I going

A Case Study of the Integration of 21st Century Technology within the Place-Based, Expeditionary Learning Outward Bound (ELOB) Approach to Education

This study focused on the integration of 21st Century technology as determined by the International Society for Technology in Education (ISTE) Standards•T within a place-based curriculum framework supplemented by the Expeditionary Learning Outward Bound approach to education as presented in a rural Colorado mountain community K-8 charter school. The case study involved an in-depth look regarding how 21st century technology integration affected the place-based, Expeditionary Learning Outward Bound approach to teaching and learning practices specific to the North Routt Community Charter School (NRCCS). The particular research aimed to inform or enhance the charter school’s current practices by questioning: How has the charter school integrated 21st Century technology in support of 21st Century skills as identified by the International Society for Technology in Education (ISTE) Standards•T ? How has 21st Century technology integration enhanced or challenged the charter school’s place-based, Expeditionary Learning Outward Bound curriculum? The case study and data analysis answered the two stated research questions. The charter school’s Expeditionary Learning Outward Bound curriculum presented a natural conduit for technology integration in support of the International Society for Technology in Education (ISTE) Standards•T through their utilization of 21st century tools such as iPads, applications, laptops, and web sites. The findings also revealed certain barriers or challenges as highlighted in question two. The lack of time, knowledge, technology-centered college preparation courses, and professional development opportunities comprised the main obstacles, with ease of use and limited devices referred to secondary, yet, paralleling the shortcomings, the findings demonstrated the participants’ persistence and real-life skill with integrating the available technology in best practices to support the Expeditionary Learning curriculum

How Do Adolescents Spell Time Use?

We investigate how household disadvantage affects the time use of 15-18 year-olds using 2003-2006 data from the American Time Use Survey. Applying competing-risk hazard models, we distinguish between the incidence and duration of activities and incorporate the daily time constraint. We find that teens living in disadvantaged households spend less time in non-classroom schooling activities than other teens. Girls spend some of this time in work activities, suggesting they are taking on adult roles. However we find more evidence of substitution into unsupervised activities, suggesting that it may be less structured environments that reduce educational investment.event history models, adolescence, time use

Psychology and Life

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How do Adolescents Spell Time Use?

We investigate how household disadvantage affects the time use of 15-18 year-olds using 2003- 2006 data from the American Time Use Survey. Applying competing-risk hazard models, we distinguish between the incidence and duration of activities and incorporate the daily time constraint. We find that teens living in disadvantaged households spend less time in nonclassroom schooling activities than other teens. Girls spend some of this time in work activities, suggesting they are taking on adult roles. However we find more evidence of substitution into unsupervised activities, suggesting that it may be less structured environments that reduce educational investment.Time use, adolescence, event history models

"Parental Child Care in Single Parent, Cohabiting, and Married Couple Families: Time Diary Evidence from the United States and the United Kingdom"

This study uses time diary data from the 2003 American Time Use Survey and the United Kingdom Time Use Survey 2000 to examine the time that single, cohabiting, and married parents devote to caring for their children. Time spent in market work, in child care as a primary activity, and in child care as a passive activity are jointly modeled using a correlated, censored regression model. Separate estimates are provided by gender, by country, and by weekend/weekday day. We find no evidence that these time allocation decisions differ for cohabiting and married parents, but there is evidence that single persons allocate time differently - as might be expected, given different household time constraints. In the U.S. single fathers spend significantly more time in primary child care on weekdays and substantially less time in passive child care on weekends than their married or cohabiting counterparts, while in the UK single fathers spend significantly more time in passive child care on weekdays. Single fathers in each country report less time at work on weekdays than their married or cohabiting counterparts. In the U.S., single mothers work more than married or cohabiting mothers on weekdays, while single mothers in the United Kingdom work less than married or cohabiting mothers on all days.

Efficient channeling of fluorescence photons from single quantum dots into guided modes of optical nanofiber

We experimentally demonstrate the efficient channeling of fluorescence photons from single q-dots on optical nanofiber into the guided modes, by measuring the photon-count rates through the guided and radiation modes simultaneously. We obtain the maximum channeling efficiency to be 22.0 (\pm4.8)% at fiber diameter of 350 nm for the emission wavelength of 780 nm. The results may open new possibilities in quantum information technologies for generating single photons into single-mode optical-fibers.Comment: 5 pages, 4 figure